Gene Summary

Gene:COIL; coilin
Aliases: CLN80, p80-coilin
Summary:The protein encoded by this gene is an integral component of Cajal bodies (also called coiled bodies). Cajal bodies are nuclear suborganelles of varying number and composition that are involved in the post-transcriptional modification of small nuclear and small nucleolar RNAs. The N-terminus of the coilin protein directs its self-oligomerization while the C-terminus influences the number of nuclear bodies assembled per cell. Differential methylation and phosphorylation of coilin likely influences its localization among nuclear bodies and the composition and assembly of Cajal bodies. This gene has pseudogenes on chromosome 4 and chromosome 14. [provided by RefSeq, Jul 2008]
Databases:VEGA, OMIM, HGNC, Ensembl, GeneCard, Gene
Source:NCBIAccessed: 11 March, 2017


What does this gene/protein do?
Show (9)

Cancer Overview

Research Indicators

Publications Per Year (1992-2017)
Graph generated 11 March 2017 using data from PubMed using criteria.

Literature Analysis

Mouse over the terms for more detail; many indicate links which you can click for dedicated pages about the topic.

  • Gene Expression
  • Neoplasm Invasiveness
  • Cancer Gene Expression Regulation
  • Mutation
  • Protein Structure, Tertiary
  • Microtubule-Associated Proteins
  • Carrier Proteins
  • Sequence Alignment
  • Breast Cancer
  • Proto-Oncogene Proteins
  • Chromosome Mapping
  • Proteins
  • Cloning, Molecular
  • Oncogene Fusion Proteins
  • Apoptosis
  • Transfection
  • Neoplasm Proteins
  • DNA-Binding Proteins
  • Protein Binding
  • Receptor Protein-Tyrosine Kinases
  • Zinc Fingers
  • Gene Expression Profiling
  • Molecular Sequence Data
  • DNA, Complementary
  • Messenger RNA
  • FISH
  • Neoplastic Cell Transformation
  • Cell Line
  • HeLa Cells
  • Amino Acid Sequence
  • Chromosome 17
  • Immunohistochemistry
  • Uterine Cancer
  • Base Sequence
  • Restriction Mapping
  • Nuclear Proteins
  • Cell Movement
  • Cell Proliferation
  • Protein-Tyrosine Kinases
  • Thymus Neoplasms
Tag cloud generated 11 March, 2017 using data from PubMed, MeSH and CancerIndex

Specific Cancers (3)

Data table showing topics related to specific cancers and associated disorders. Scope includes mutations and abnormal protein expression.

Note: list is not exhaustive. Number of papers are based on searches of PubMed (click on topic title for arbitrary criteria used).

Latest Publications: COIL (cancer-related)

Chang CD, Lin PY, Hsu JL, Shih WL
Ursolic Acid Suppresses Hepatitis B Virus X Protein-mediated Autophagy and Chemotherapeutic Drug Resistance.
Anticancer Res. 2016; 36(10):5097-5107 [PubMed] Related Publications
Hepatitis B virus X (HBx) protein is a multifunctional oncoprotein that affects diverse cell activities via regulation of various host cell signaling pathways. The current investigation demonstrated that ursolic acid (UA), a pentacyclic triterpenoid, protected hepatoma cells and reduced HBx-mediated autophagy through modulation of Ras homolog gene family member A (RhoA). Low-level ectopic HBx expression in Huh7 cells induced more significant autophagosome formation than high-level HBx expression. HBx activated beclin-1 promoter and enhanced the beclin-1 protein expression under low HBx expression. Transcription factor AP-1 played an essential function in HBx-mediated beclin-1 promoter activation. Inhibition of RhoA and its downstream effector Rho-associated coiled-coil-containing protein kinase 1 (ROCK1) alleviated HBx-mediated autophagy significantly. Transiently-expressed HBx elicited an increased RhoA-GTP level, as well as phospho-ROCK1 transient accumulation. Utilization of transactivation-deficient HBx demonstrated that the transactivation activity of HBx is required for autophagy induction. Furthermore, UA suppressed HBx-mediated RhoA activation, beclin-1 promoter activation and subsequent autophagy induction, while, most importantly, reversed HBx-induced anti-cancer drug resistance.

Banerjee A, Ray S
Structural insight with mutational impact on tyrosinase and PKC-β interaction from Homo sapiens: Molecular modeling and docking studies for melanogenesis, albinism and increased risk for melanoma.
Gene. 2016; 592(1):99-109 [PubMed] Related Publications
Human tyrosinase, is an important protein for biosynthetic pathway of melanin. It was studied to be phosphorylated and activated by protein kinase-C, β-subunit (PKC-β) through earlier experimentations with in vivo evidences. Documentation documents that mutation in two essentially vital serine residues in C-terminal end of tyrosinase leads to albinism. Due to the deficiency of protective shield like enzyme; melanin, albinos are at an increased peril for melanoma and other skin cancers. So, computational and residue-level insight including a mutational exploration with evolutionary importance into this mechanism lies obligatory for future pathological and therapeutic developments. Therefore, functional tertiary models of the relevant proteins were analyzed after satisfying their stereo-chemical features. Evolutionarily paramount residues for the activation of tyrosinase were perceived via multiple sequence alignment phenomena. Mutant-type tyrosinase protein (S98A and S102A) was thereby modeled, maintaining the wild-type proteins' functionality. Furthermore, this present comparative study discloses the variation in the stable residual participation (for mutant-type and wild-type tyrosinase-PKCβ complex). Mainly, an increased number of polar negatively charged residues from the wild-type tyrosinase participated with PKC-β, predominantly. Fascinatingly supported by evaluation of statistical significances, mutation even led to a destabilizing impact in tyrosinase accompanied by conformational switches with a helix-to-coil transition in the mutated protein. Even the allosteric sites in the protein got poorly hampered upon mutation leading to weaker tendency for binding partners to interact.

Kwon YC, Kim S, Lee YS, et al.
Novel nuclear targeting coiled-coil protein of Helicobacter pylori showing Ca(2+)-independent, Mg(2+)-dependent DNase I activity.
J Microbiol. 2016; 54(5):387-95 [PubMed] Related Publications
HP0059, an uncharacterized gene of Helicobacter pylori, encodes a 284-aa-long protein containing a nuclear localization sequence (NLS) and multiple leucine-rich heptad repeats. Effects of HP0059 proteins in human stomach cells were assessed by incubation of recombinant HP0059 proteins with the AGS human gastric carcinoma cell line. Wild-type HP0059 proteins showed cytotoxicity in AGS cells in a concentration-dependent manner, whereas NLS mutant protein showed no effect, suggesting that the cytotoxicity is attributed to host nuclear localization. AGS cells transfected with pEGFP-HP0059 plasmid showed strong GFP signal merged to the chromosomal DNA region. The chromosome was fragmented into multiple distinct dots merged with the GFP signal after 12 h of incubation. The chromosome fragmentation was further explored by incubation of AGS chromosomal DNA with recombinant HP0059 proteins, which leaded to complete degradation of the chromosomal DNA. HP0059 protein also degraded circular plasmid DNA without consensus, being an indication of DNase I activity. The DNase was activated by MgCl2, but not by CaCl2. The activity was completely blocked by EDTA. The optimal pH and temperature for DNase activity were 7.0-8.0 and 55°C, respectively. These results indicate that HP0059 possesses a novel DNase I activity along with a role in the genomic instability of human gastric cells, which may result in the transformation of gastric cells.

Zhang WD, Chen HX, Wang YX, et al.
Bioinformatic analysis of c-Myc target from laryngeal cancer cell gene of laryngeal cancer.
J Cancer Res Ther. 2016 Jan-Mar; 12(1):58-61 [PubMed] Related Publications
AIM OF STUDY: The aim was to explore the structure and functions of new target spot c-Myc target from laryngeal cancer cell. (MTLC) of c-Myc gene.
METHODS: This study adopted bioinformatic methods to analyze the physicochemical property, secondary structure, hydrophobic region, a transmembrane region, and prediction of functions.
RESULTS: The results showed that the whole length of the open reading frames was 708 bp, coding was 235 amino acids. This protein was a basic protein possessed two transmembrane structures and weight was about 26592.5 Da. The main elements of secondary structure were alpha-helix and random coil. MTLC was a membrane constitutive protein that possessed signal transduction and regulation may locate on karyotheca as results of subcellular localization and function prediction.
CONCLUSION: This study has provided the theoretical basis for the further discussion of the effect and mechanism of action of MTLC in the occurrence of laryngeal cancer.

Li L, Dong L, Qu X, et al.
Tripartite motif 16 inhibits hepatocellular carcinoma cell migration and invasion.
Int J Oncol. 2016; 48(4):1639-49 [PubMed] Related Publications
Tripartite motif 16 (TRIM16), a member of the RING B-box coiled-coil (RBCC)/tripartite totif (TRIM) protein family, has been demonstrated to have significant effects on tumor migration by previous studies, but its specific contribution to hepatocellular carcinoma (HCC) is currently unknown. The aim of this study was to evaluate the prognostic value of TRIM16 and investigate its functional roles in HCC. The expression of TRIM16 in HCC patient samples were examined using qRT-PCR and western blotting. HCC cell lines with either TRIM16 overexpression or knockdown were established. The effect of TRIM16 on HCC cell migration and invasion was investigated using these cells. Compared with paired normal liver tissues in clinical cancer samples, we found that the expression of TRIM16 was significantly downregulated in HCC lesions. We also found knockdown of TRIM16 promoted epithelial-mesenchymal transition (EMT) in a manner associated with HCC metastasis in vitro and in vivo. Mechanistically, TRIM16 inhibited ZEB2 expression, which in turn inhibited transcription of the pivotal ZEB2 target gene E-cadherin. RNA interference-mediated silencing of ZEB2 attenuated shTRIM16-enhanced cell migration and invasion. In conclusion, our findings define TRIM16 as an inhibitor of EMT and metastasis in HCC that predicts poor clinical outcomes.

Jattani RP, Tritapoe JM, Pomerantz JL
Cooperative Control of Caspase Recruitment Domain-containing Protein 11 (CARD11) Signaling by an Unusual Array of Redundant Repressive Elements.
J Biol Chem. 2016; 291(16):8324-36 [PubMed] Article available free on PMC after 15/04/2017 Related Publications
Several classes of signaling proteins contain autoinhibitory domains that prevent unwarranted signaling and coordinate the induction of activity in response to external cues. CARD11, a scaffold protein critical for antigen receptor signaling to NF-κB, undergoes autoregulation by a poorly understood inhibitory domain (ID), which keeps CARD11 inactive in the absence of receptor triggering through inhibitory intramolecular interactions. This autoinhibitory strategy makes CARD11 highly susceptible to gain-of-function mutations that are frequently observed in diffuse large B cell lymphoma (DLBCL) and that disrupt ID-mediated autoinhibition, leading to constitutive NF-κB activity, which can promote lymphoma proliferation. Although DLBCL-associated CARD11 mutations in the caspase recruitment domain (CARD), LATCH domain, and coiled coil have been shown to disrupt intramolecular ID binding, surprisingly, no gain-of-function mutations in the ID itself have been reported and validated. In this study, we solve this paradox and report that the CARD11 ID contains an unusual array of four repressive elements that function cooperatively with redundancy to prevent spontaneous NF-κB activation. Our quantitative analysis suggests that potent oncogenic CARD11 mutations must perturb autoinhibition by at least three repressive elements. Our results explain the lack of ID mutations in DLBCL and reveal an unusual autoinhibitory domain structure and strategy for preventing unwarranted scaffold signaling to NF-κB.

Jattani RP, Tritapoe JM, Pomerantz JL
Intramolecular Interactions and Regulation of Cofactor Binding by the Four Repressive Elements in the Caspase Recruitment Domain-containing Protein 11 (CARD11) Inhibitory Domain.
J Biol Chem. 2016; 291(16):8338-48 [PubMed] Article available free on PMC after 15/04/2017 Related Publications
The CARD11 signaling scaffold transmits signaling between antigen receptors on B and T lymphocytes and the transcription factor NF-κB during the adaptive immune response. CARD11 activity is controlled by an inhibitory domain (ID), which participates in intramolecular interactions and prevents cofactor binding prior to receptor triggering. Oncogenic CARD11 mutations associated with the activated B cell-like subtype of diffuse large B cell lymphoma somehow perturb ID-mediated autoinhibition to confer CARD11 with the dysregulated spontaneous signaling to NF-κB that is required for the proliferation and survival of the lymphoma. Here, we investigate how the four repressive elements (REs) we have discovered in the CARD11 ID function to inhibit CARD11 activity with cooperativity and redundancy. We find that each RE contributes to the maintenance of the closed inactive state of CARD11 that predominates in the absence of receptor engagement. Each RE also contributes to the prevention of Bcl10 binding in the basal unstimulated state. RE1, RE2, and RE3 participate in intramolecular interactions with other CARD11 domains and share domain targets for binding. Remarkably, diffuse large B cell lymphoma-associated gain-of-function mutations in the caspase recruitment domain, LATCH, or coiled coil can perturb intramolecular interactions mediated by multiple REs, suggesting how single amino acid oncogenic CARD11 mutations can perturb or bypass the action of redundant inhibitory REs to achieve the level of hyperactive CARD11 signaling required to support lymphoma growth.

Fish L, Pencheva N, Goodarzi H, et al.
Muscleblind-like 1 suppresses breast cancer metastatic colonization and stabilizes metastasis suppressor transcripts.
Genes Dev. 2016; 30(4):386-98 [PubMed] Article available free on PMC after 15/04/2017 Related Publications
Post-transcriptional deregulation is a defining feature of metastatic cancer. While many microRNAs have been implicated as regulators of metastatic progression, less is known about the roles and mechanisms of RNA-binding proteins in this process. We identified muscleblind-like 1 (MBNL1), a gene implicated in myotonic dystrophy, as a robust suppressor of multiorgan breast cancer metastasis. MBNL1 binds the 3' untranslated regions (UTRs) of DBNL (drebrin-like protein) and TACC1 (transforming acidic coiled-coil containing protein 1)-two genes that we implicate as metastasis suppressors. By enhancing the stability of these genes' transcripts, MBNL1 suppresses cell invasiveness. Consistent with these findings, elevated MBNL1 expression in human breast tumors is associated with reduced metastatic relapse likelihood. Our findings delineate a post-transcriptional network that governs breast cancer metastasis through RNA-binding protein-mediated transcript stabilization.

Chai P, Tian J, Zhao D, et al.
GSE1 negative regulation by miR-489-5p promotes breast cancer cell proliferation and invasion.
Biochem Biophys Res Commun. 2016; 471(1):123-8 [PubMed] Related Publications
Gse1 coiled-coil protein (GSE1), also known as KIAA0182, is a proline rich protein. However, the function of GSE1 is largely unknown. In this study, we reported that GSE1 is overexpression in breast cancer and silencing of GSE1 significantly suppressed breast cancer cells proliferation, migration and invasion. Furthermore, GSE1 was identified as a direct target of miR-489-5p, which is significantly reduced in breast cancer tissues. In addition, forced expression of miR-489-5p suppressed breast cancer cells proliferation, migration and invasion. Moreover, depletion of GSE1 by siRNAs significantly abrogated the enhanced proliferation, migration and invasion of breast cancer cells consequent to miR-489-5p depletion. Taken together, these findings suggest that GSE1 may function as a novel oncogene in breast cancer and it can be regulated by miR-489-5p.

Zhang LY, Wu JL, Qiu HB, et al.
PSCA acts as a tumor suppressor by facilitating the nuclear translocation of RB1CC1 in esophageal squamous cell carcinoma.
Carcinogenesis. 2016; 37(3):320-32 [PubMed] Related Publications
Esophageal squamous cell carcinoma (ESCC) is an aggressive malignancy; its mechanisms of development and progression are poorly understood. By high-throughput transcriptome sequencing (RNA-Seq) profiling of three pairs of primary ESCCs and their corresponding non-tumorous tissues, we identified that prostate stem cell antigen (PSCA), a gene that encodes a glycosylphosphatidylinositol-anchored protein, is significantly downregulated in ESCC. Here, we reported decreased expression of PSCA in 188/218 (86.2%) of primary ESCC cases and was negatively regulated by its transcription factor sex-determining region Y-box5 that was significantly associated with the poor differentiation (P = 0.003), increased lymph node metastasis (P < 0.0001), advanced stage (P = 0.007), and disease-specific survival (P < 0.0001), but not associated with the recently reported transcrible rs2294008 (C > T) polymorphism in ESCC. Functional studies showed that PSCA could arrest cell cycle progression and promote cell differentiation independent of the start codon polymorphism. Further mechanistic studies revealed that retinoblastoma 1-inducible coiled-coil 1 (RB1CC1), a key signaling node to regulate cellular proliferation and differentiation, interacted specifically with PSCA in ESCC cells. Binding of PSCA and RB1CC1 in cytoplasm resulted in stabilization and translocation of RB1CC1 into nucleus, thereby activating key factors involved in cell cycle arrest and differentiation. Collectively, our data provide a novel molecular mechanism for the tumor suppressor role of PSCA and may help design effective therapy targeting PSCA-RB1CC1 pathway to control esophageal cancer growth and differentiation.

Liu Y, Kheradmand F, Davis CF, et al.
Focused Analysis of Exome Sequencing Data for Rare Germline Mutations in Familial and Sporadic Lung Cancer.
J Thorac Oncol. 2016; 11(1):52-61 [PubMed] Article available free on PMC after 15/04/2017 Related Publications
INTRODUCTION: The association between smoking-induced chronic obstructive pulmonary disease (COPD) and lung cancer (LC) is well documented. Recent genome-wide association studies (GWAS) have identified 28 susceptibility loci for LC, 10 for COPD, 32 for smoking behavior, and 63 for pulmonary function, totaling 107 nonoverlapping loci. Given that common variants have been found to be associated with LC in genome-wide association studies, exome sequencing of these high-priority regions has great potential to identify novel rare causal variants.
METHODS: To search for disease-causing rare germline mutations, we used a variation of the extreme phenotype approach to select 48 patients with sporadic LC who reported histories of heavy smoking-37 of whom also exhibited carefully documented severe COPD (in whom smoking is considered the overwhelming determinant)-and 54 unique familial LC cases from families with at least three first-degree relatives with LC (who are likely enriched for genomic effects).
RESULTS: By focusing on exome profiles of the 107 target loci, we identified two key rare mutations. A heterozygous p.Arg696Cys variant in the coiled-coil domain containing 147 (CCDC147) gene at 10q25.1 was identified in one sporadic and two familial cases. The minor allele frequency (MAF) of this variant in the 1000 Genomes database is 0.0026. The p.Val26Met variant in the dopamine β-hydroxylase (DBH) gene at 9q34.2 was identified in two sporadic cases; the minor allele frequency of this mutation is 0.0034 according to the 1000 Genomes database. We also observed three suggestive rare mutations on 15q25.1: iron-responsive element binding protein neuronal 2 (IREB2); cholinergic receptor, nicotinic, alpha 5 (neuronal) (CHRNA5); and cholinergic receptor, nicotinic, beta 4 (CHRNB4).
CONCLUSIONS: Our results demonstrated highly disruptive risk-conferring CCDC147 and DBH mutations.

Yin de T, Xu J, Lei M, et al.
Characterization of the novel tumor-suppressor gene CCDC67 in papillary thyroid carcinoma.
Oncotarget. 2016; 7(5):5830-41 [PubMed] Article available free on PMC after 15/04/2017 Related Publications
BACKGROUND: Some studies showed an association of coiled-coil domain-containing (CCDC) genes with cancers. Our previous limited data specifically suggested a possible pathogenic role of CCDC67 in papillary thyroid cancer (PTC), but this has not been firmly established. The present study was to further investigate and establish this role of CCDC67 in PTC.
RESULTS: The expression of CCDC67, both at mRNA and protein levels, was sharply down-regulated in PTC compared with normal thyroid tissues. Lower CCDC67 expression was significantly associated with aggressive tumor behaviors, such as advanced tumor stages and lymph node metastasis, as well as BRAF mutation. Introduced expression of CCDC67 in TPC-1 cells robustly inhibited cell proliferation, colony formation and migration, induced G1 phase cell cycle arrest, and increased cell apoptosis.
METHODS: Primary PTC tumors and matched normal thyroid tissues were obtained from 200 unselected patients at the initial surgery for detection of CCDC67 mRNA and protein by RT-PCR and Western blotting analyses, respectively. Genomic DNA sequencing was performed to detect BRAF mutation in PTC tumors. Clinicopathological data were retrospectively reviewed for correlation analyses. PTC cell line TPC-1 with stable transfection of CCDC67 was used to investigate the functions of CCDC67.
CONCLUSIONS: This large study demonstrates down-regulation of CCDC67 in PTC, an inverse relationship between CCDC67 expression and PTC aggressiveness and BRAF mutation, and a robust inhibitory effect of CCDC67 on PTC cellular activities. These results are consistent with CCDC67 being a novel and impaired tumor suppressor gene in PTC, providing important prognostic and therapeutic implications for this cancer.

Hsu CY, Chang ZF, Lee HH
Immunohistochemical evaluation of ROCK activation in invasive breast cancer.
BMC Cancer. 2015; 15:943 [PubMed] Article available free on PMC after 15/04/2017 Related Publications
BACKGROUND: Two isoforms of Rho-associated coiled-coil kinase (ROCK), ROCKI and ROCKII, play an important role in many cellular processes. Despite the accumulating evidence showing that ROCK could be a potential cancer therapeutic target, the relevant tumor types to ROCK activation are not well clarified. The aim of this study was to evaluate the ROCK activation status in different tumor types of breast cancer.
RESULTS: We evaluated the immunoreactivities of phosphorylation-specific antibodies of ROCKI and ROCKII to inform their kinase activation in 275 of breast carcinoma tissues, including 56 of carcinoma in situ, 116 of invasive carcinoma, and 103 of invasive carcinoma with metastasis. ROCKII activation signal detected in nucleus was significantly correlated with tumor metastasis, while ROCKI and cytosolic ROCKII activation signals made no significant difference in that metastasis. Furthermore, nuclear ROCKII activation signal was associated with poor clinical outcome and correlated with late tumor stage, low expression of estrogen receptor (ER) and progesterone receptor (PR), overexpression of human epidermal growth factor receptor 2 (HER2) and high Ki67 labeling index.
CONCLUSIONS: Nuclear ROCKII activation signal might contribute to the tumor metastasis in breast cancer. Differences in ROCK activation that underlie the phenotypes of breast cancer could enhance our understanding for the use of ROCK inhibitors in cancer therapy.

Jiang F, Kuang B, Que Y, et al.
The clinical significance of transforming acidic coiled-coil protein 3 expression in non-small cell lung cancer.
Oncol Rep. 2016; 35(1):436-46 [PubMed] Related Publications
The relationship between TACC3, a member of the transforming acidic coiled-coil proteins (TACCs) family, and lung carcinoma remains unclear. The present study was designed to explore the prognostic and clinical significance of TACC3 in non-small cell lung cancer (NSCLC). An immunohistochemistry (IHC) assay was performed to analyze the expression of TACC3 in 195 lung cancer cases. The mRNA and protein levels of TACC3 were examined by quantitative reverse transcription-PCR or western blotting. The correlation between TACC3 expression and clinicopathological factors was analyzed by χ2 analysis and Fisher's exact test. Kaplan-Meier analysis and the Cox proportional hazards model were used to examine the correlation of prognostic outcomes with TACC3. The results showed that the levels of TACC3 mRNA and total protein were higher in lung cancer lesions than paired non-cancerous tissues. IHC analysis revealed that TACC3 was highly expressed in 94 (48.2%) cases. The expression of TACC3 was strongly correlated with smoking status, histological classification, differentiation, cytokeratin 19 fragment levels, T stage and the clinical stage of NSCLC patients. Univariate and multivariate analyses demonstrated that TACC3 is a useful biomarker for NSCLC prognosis. The low TACC3 expression group exhibited better progression-free survival (PFS) among patients who received anti-microtubule chemotherapy. In conclusion, the results showed that a high level of TACC3 expression was correlated with advanced clinicopathological classifications, poor overall survival (OS) and poor recurrence-free survival (RFS) in NSCLC patients. Our findings indicate that TACC3 is a potential prognostic marker and therapeutic target for NSCLC.

Chin VT, Nagrial AM, Chou A, et al.
Rho-associated kinase signalling and the cancer microenvironment: novel biological implications and therapeutic opportunities.
Expert Rev Mol Med. 2015; 17:e17 [PubMed] Article available free on PMC after 15/04/2017 Related Publications
The Rho/ROCK pathway is involved in numerous pivotal cellular processes that have made it an area of intense study in cancer medicine, however, Rho-associated coiled-coil containing protein kinase (ROCK) inhibitors are yet to make an appearance in the clinical cancer setting. Their performance as an anti-cancer therapy has been varied in pre-clinical studies, however, they have been shown to be effective vasodilators in the treatment of hypertension and post-ischaemic stroke vasospasm. This review addresses the various roles the Rho/ROCK pathway plays in angiogenesis, tumour vascular tone and reciprocal feedback from the tumour microenvironment and explores the potential utility of ROCK inhibitors as effective vascular normalising agents. ROCK inhibitors may potentially enhance the delivery and efficacy of chemotherapy agents and improve the effectiveness of radiotherapy. As such, repurposing of these agents as adjuncts to standard treatments may significantly improve outcomes for patients with cancer. A deeper understanding of the controlled and dynamic regulation of the key components of the Rho pathway may lead to effective use of the Rho/ROCK inhibitors in the clinical management of cancer.

Wu SH, Hsiao YT, Kuo CL, et al.
Bufalin Inhibits NCI-H460 Human Lung Cancer Cell Metastasis In Vitro by Inhibiting MAPKs, MMPs, and NF-κB Pathways.
Am J Chin Med. 2015; 43(6):1247-64 [PubMed] Related Publications
Bufalin, a component of Chan Su (a traditional Chinese medicine), has been known to have antitumor effects for thousands of years. In this study, we investigated its anti-metastasis effects on NCI-H460 lung cancer cells. Under sub-lethal concentrations (from 25 up to 100 nM), bufalin significantly inhibits the invasion and migration nature of NCI-H460 cells that were measured by Matrigel Cell Migration Assay and Invasion System. Bufalin also suppressed the enzymatic activity of matrix metalloproteinase (MMP)-9, which was examined by gelatin zymography methods. Western blotting revealed that bufalin depressed several key metastasis-related proteins, such as NF-κB, MMP-2, MMP-9, protein kinase C (PKC), phosphatidylinositol 3-kinase (PI3-K), phosphorylated Akt, growth factor receptor-bound protein 2 (GRB2), phosphorylated extracellular signal-regulated kinase (ERK), phosphorylated p38, and phosphorylated c-Jun NH2-terminal kinase (JNK). As evidenced by immunostaining and the electrophoretic mobility shift assay (EMSA), bufalin induced not only a decreased cytoplasmic NF-κB production, but also decreased its nuclear translocation. Several metastasis-related genes, including Rho-associated (Rho A), coiled-coil-containing protein kinase 1 (ROCK1), and focal adhesion kinase (FAK), were down-regulated after bufalin treatment. In conclusion, bufalin is effective in inhibiting the metastatic nature of NCI-H460 cells in low, sub-lethal concentrations. Such an effect involves many mechanisms including MMPs, mitogen-activated protein kinases (MAPKs) and NF-κB systems. Bufalin has a potential to evolve into an anti-metastasis drug for human lung cancer in the future.

Gong Y, Qiu W, Ning X, et al.
CCDC34 is up-regulated in bladder cancer and regulates bladder cancer cell proliferation, apoptosis and migration.
Oncotarget. 2015; 6(28):25856-67 [PubMed] Article available free on PMC after 15/04/2017 Related Publications
The coiled coil is a superhelical structural protein motif involved in a diverse array of biological functions, and the abnormal expression of the coiled-coil domain containing proteins has a direct link with the phenotype of tumor cell migration, invasion and metastasis. The aim of this study was to investigate the critical role of Coiled-coil domain-containing protein 34 (CCDC34) in bladder carcinogenesis, which has never been reported to date. Here, we found CCDC34 expression was elevated in bladder cancer tissues and cell lines. The knockdown of CCDC34 via lentivirus-mediated siRNA significantly suppressed bladder cancer cells proliferation and migration, and induced cell cycle arrest at G2/M phase and increased apoptosis in vitro. In addition, CCDC34 knockdown suppressed bladder tumor growth in nude mice. Moreover, CCDC34 silencing decreased the phosphorylation of MEK, ERK1/2, JNK, p38 and Akt, and the expressions of c-Raf and c-Jun, indicating MAPK and AKT pathways (ERK/MAPK, p38/MAPK, JNK/MAPK and PI3K/Akt) might be involved in CCDC34 regulation of bladder cancer cell proliferation and migration. Our findings revealed for the first time a potential oncogenic role for CCDC34 in bladder carcinoma pathogenesis and it may serve as a biomarker or even a therapeutic target for bladder cancer.

Xu B, Huang Y, Niu X, et al.
Hsa-miR-146a-5p modulates androgen-independent prostate cancer cells apoptosis by targeting ROCK1.
Prostate. 2015; 75(16):1896-903 [PubMed] Related Publications
BACKGROUND: MicroRNAs (miRNAs) have been demonstrated playing important roles in the procession of prostate cancer cells transformation from androgen-dependence to androgen-independence.
METHODS: We conducted the miRNA microarray and realtime PCR analyses in both androgen-dependent (ADPC) and androgen-independent prostate cancer (AIPC) tissues. We also explored the role of hsa-miR-146a-5p (miR-146a) in MSKCC prostate cancer clinical database. Moreover, the impact of miR-146a on prostate cancer cells apoptosis were detected by Hoechst staining and fluorescence-activated cell sorter (FACS). Its target is predicted by DIANA LAB online database and the result was assumed by western blotting and luciferase assay.
RESULTS: We demonstrated that miR-146a was down-regulated in AIPC tissues and cell lines compared to that in the ADPC tissues. In MSKCC data re-analyses, we found that miR-146a was underexpressed in metastatic prostate cancer tissues and those with Gleason score >8, moreover, low level of miR-146a represented a high biochemical relapse rate after radical prostatectomy. In the functional analyses, we transfected miR-146a mimics into CPRC cell lines and found miR-146a induced cells apoptosis. In mechanic analyses, we found that miR-146a inhibited the basal level of Rho-associated, coiled-coil containing protein kinase 1 (ROCK1) expression by targeting its 3'UTR and an inverse correlation of expression between miR-146a and ROCK1 was observed. Moreover, caspase 3 activity was stimulated by miR-146a overexpression.
CONCLUSION: miR-146a has a critical role in the process of AIPC prostate cancer cells apoptosis through regulation of ROCK/Caspase 3 pathway. Targeting this pathway may be a promising therapeutic strategy for future personalized anti-cancer treatment.

Anoosha P, Huang LT, Sakthivel R, et al.
Discrimination of driver and passenger mutations in epidermal growth factor receptor in cancer.
Mutat Res. 2015; 780:24-34 [PubMed] Related Publications
Cancer is one of the most life-threatening diseases and mutations in several genes are the vital cause in tumorigenesis. Protein kinases play essential roles in cancer progression and specifically, epidermal growth factor receptor (EGFR) is an important target for cancer therapy. In this work, we have developed a method to classify single amino acid polymorphisms (SAPs) in EGFR into disease-causing (driver) and neutral (passenger) mutations using both sequence and structure based features of the mutation site by machine learning approaches. We compiled a set of 222 features and selected a set of 21 properties utilizing feature selection methods, for maximizing the prediction performance. In a set of 540 mutants, we obtained an overall classification accuracy of 67.8% with 10 fold cross validation using support vector machines. Further, the mutations have been grouped into four sets based on secondary structure and accessible surface area, which enhanced the overall classification accuracy to 80.2%, 81.9%, 77.9% and 75.1% for helix, strand, coil-buried and coil-exposed mutants, respectively. The method was tested with a blind dataset of 60 mutations, which showed an average accuracy of 85.4%. These accuracy levels are superior to other methods available in the literature for EGFR mutants, with an increase of more than 30%. Moreover, we have screened all possible single amino acid polymorphisms (SAPs) in EGFR and suggested the probable driver and passenger mutations, which would help in the development of mutation specific drugs for cancer treatment.

Nahm JH, Kim H, Lee H, et al.
Transforming acidic coiled-coil-containing protein 3 (TACC3) overexpression in hepatocellular carcinomas is associated with "stemness" and epithelial-mesenchymal transition-related marker expression and a poor prognosis.
Tumour Biol. 2016; 37(1):393-403 [PubMed] Related Publications
There is accumulating evidence that hepatocellular carcinomas (HCCs) expressing "stemness"-related markers, e.g., keratin 19 (K19) and epithelial cell adhesion molecule (EpCAM), are associated with aggressive biological behavior. In order to further investigate the molecular characteristics of this subgroup of HCCs, we examined copy number alterations of K19-positive and K19-negative HCCs and found frequent amplifications of the 4p16.3 locus containing the TACC3 gene, which has previously not been described in HCCs. We performed an immunohistochemical analysis of transforming acidic coiled-coil-containing protein 3 (TACC3) expression in HCCs in whole tissue sections and tissue microarrays and examined the clinicopathological characteristics of TACC3-overexpressing HCCs in relation to stemness-related marker (K19, EpCAM) expression, epithelial-mesenchymal transition (EMT)-related proteins, and survival. Cytoplasmic TACC3 protein expression was seen in 7/7 whole tissue sections of K19-positive HCCs, while TACC3 expression was negative or patchy in K19-negative cases. In the tissue microarray cohort, TACC3 was overexpressed in 105/188 (55.9 %) HCCs and was associated with poor differentiation (p = 0.028), major vascular invasion (p = 0.039), higher tumor stages (p = 0.015), younger age (p = 0.003), higher proliferative activity (p < 0.001), and more frequent multipolar mitoses (p < 0.001). TACC3 expression was significantly correlated with K19 (p = 0.010) and EpCAM (p < 0.001) positivity. In addition, TACC3 overexpression was associated with frequent expression of S100A4, uPAR, and ezrin (p < 0.001, all) and loss of E-cadherin expression (p = 0.014), and overall survival was significantly decreased in patients with TACC3-positive HCCs (p = 0.014). In conclusion, TACC3 overexpression was associated with clinicopathological features of aggressiveness, increased EMT-related protein expression, and poor survival, suggesting a potential role for TACC3 as a prognostic biomarker and therapeutic target in HCC.

Zhou DS, Wang HB, Zhou ZG, et al.
TACC3 promotes stemness and is a potential therapeutic target in hepatocellular carcinoma.
Oncotarget. 2015; 6(27):24163-77 [PubMed] Article available free on PMC after 15/04/2017 Related Publications
Transforming acidic coiled-coil protein 3 (TACC3) is essential for cell mitosis and transcriptional functions. In the present study, we first demonstrated that both TACC3 protein and mRNA levels were elevated in HCC tissue samples compared with non-cancerous tissue biopsies according to western blot analyses, immunohistochemistry (IHC) and quantitative real-time PCR (qRT-PCR) assays. Moreover, high TACC3 expression was positively correlated with poor overall survival (OS) and disease-free survival (DFS) (p < 0.001). Using HCC cell lines, we then demonstrated that either TACC3 knockdown or treatment with the potential TACC3 inhibitor KHS101 suppressed cell growth and sphere formation as well as the expression of stem cell transcription factors, including Bmi1, c-Myc and Nanog. Silencing TACC3 may suppress the Wnt/β-catenin and PI3K/AKT signaling pathways, which regulate cancer stem cell-like characteristics. Taken together, these data suggest that TACC3 is enriched in HCC and that TACC3 down-regulation inhibits the proliferation, clonogenicity, and cancer stem cell-like phenotype of HCC cells. KHS101, a TACC3 inhibitor, may serve as a novel therapeutic agent for HCC patients with tumors characterized by high TACC3 expression.

Watt SA, Purdie KJ, den Breems NY, et al.
Novel CARD11 Mutations in Human Cutaneous Squamous Cell Carcinoma Lead to Aberrant NF-κB Regulation.
Am J Pathol. 2015; 185(9):2354-63 [PubMed] Article available free on PMC after 15/04/2017 Related Publications
NF-κB signaling plays a crucial role in regulating proliferation and differentiation in the epidermis. Alterations in the NF-κB pathway can lead to skin pathologies with a significant burden to human health such as psoriasis and cutaneous squamous cell carcinoma (cSCC). Caspase recruitment domain (CARD)-containing scaffold proteins are key regulators of NF-κB signaling by providing a link between membrane receptors and NF-κB transcriptional subunits. Mutations in the CARD family member, CARD14, have been identified in patients with the inflammatory skin diseases psoriasis and pityriasis rubra pilaris. Here, we describe that the gene coding for another CARD scaffold protein, CARD11, is mutated in more than 38% of 111 cSCCs, and show that novel variants outside of the coiled-coil domain lead to constitutively activated NF-κB signaling. CARD11 protein expression was detectable in normal skin and increased in all cSCCs tested. CARD11 mRNA levels were comparable with CARD14 in normal skin and CARD11 mRNA was increased in cSCC. In addition, we identified CARD11 mutations in peritumoral and sun-exposed skin, suggesting that CARD11-mediated alterations in NF-κB signaling may be an early event in the development of cSCC.

Chiba S, Enami T, Ogawa S, Sakata-Yanagimoto M
G17V RHOA: Genetic evidence of GTP-unbound RHOA playing a role in tumorigenesis in T cells.
Small GTPases. 2015; 6(2):100-3 [PubMed] Article available free on PMC after 15/04/2017 Related Publications
RHOA is a member of RHO family small GTPases. Over the past 2 decades, numerous biochemical and cell biological studies on RHOA have demonstrated signalings such as activation of RHO-associated coiled-coil forming kinases through guanine nucleotide exchange and GTP hydrolysis, cellular responses such as actin fiber formation and myocin activation, biological consequences such as cell motility and cytokineses, etc. There have also been a plenty of active discussion on the roles of RHOA in tumorigenesis, primarily based on gain- and loss-of-function experiments. However, cell-type-specific functions of RHOA have only recently been delineated by conditional gene targeting strategies. Furthermore, very little information had been available on human cancer genetics until we and others recently reported frequent somatic RHOA mutations in a distinct subtype of T-cell-type malignant lymphoma called angioimmunoblastic T-cell lymphoma (AITL), and other T-cell lymphoma with AITL-like features. The RHOA mutations were very specific to these types of lymphoma among hematologic malignancies, and a single hotspot, glycine at the 17th position, was affected by the replacement with valine (G17V). Remarkably, G17V RHOA did not bind GTP, and moreover, it inhibited the GTP binding to wild-type RHOA. How G17V RHOA contributes to T-cell lymphomagenesis needs to be clarified.

Luo Y, Jiang QW, Wu JY, et al.
Regulation of migration and invasion by Toll-like receptor-9 signaling network in prostate cancer.
Oncotarget. 2015; 6(26):22564-74 [PubMed] Article available free on PMC after 15/04/2017 Related Publications
Toll-like receptors (TLRs) play an important role in tumorigenesis and progress of prostate cancer. However, the function and mechanism of Toll-like receptor-9 (TLR9) in prostate cancer is not totally understood. Here, we found that high expression of TLR9 was associated with a higher probability of lymph node metastasis and poor prognosis. Further in vitro functional study verified that silence of TLR9 inhibited migration and invasion of PC-3 cells, indicating expression of TLR9 involving in the migration and invasion of cancer cells. The data of microarray exhibited silence of TLR9 induced 205 genes with larger than 2-fold changes in expression levels, including 164 genes down-regulated and 41 genes up-regulated. Functional Gene Ontology (GO) processes annotation demonstrated that the top three scores of molecular and cellular functions were regulation of programmed cell death, regulation of locomotion and response to calcium ion. TLR9 signaling network analysis of the migration and invasion related genes identified several genes, like matrix metallopeptidase 2 (MMP2), matrix metallopeptidase 9 (MMP9), chemokine receptor 4 (CXCR4) and interleukin 8 (IL8), formed the core interaction network based on their known biological relationships. A few genes, such as odontogenic ameloblast-associated protein (ODAM), claudin 2 (CLDN2), gap junction protein beta 1 (GJB1) and Rho-associated coiled-coil containing protein kinase 1 pseudogene 1 (ROCK1P1), so far have not been found to interact with the other genes. This study provided the foundation to discover the new molecular mechanism in signaling networks of invasion and metastasis in prostate cancer.

Huang J, Shi Y, Li H, et al.
MicroRNA-144 acts as a tumor suppressor by targeting Rho-associated coiled-coil containing protein kinase 1 in osteosarcoma cells.
Mol Med Rep. 2015; 12(3):4554-9 [PubMed] Related Publications
MicroRNAs (miRs) have been demonstrated to be associated with multiple processes in the development and progression of human malignancies. Previous studies have observed aberrant downregulation of miR‑144 in several types of cancer, including osteosarcoma. However, the function of miR‑144 and the underlying mechanism in osteosarcoma remain to be elucidated. The present study indicated that miR‑144 was markedly downregulated in osteosarcoma tissues and cell lines compared with that in the normal controls. Restoration of miR‑144 significantly inhibited cell proliferation, migration and invasion of MG‑63 osteosarcoma cells. In addition, Rho‑associated coiled‑coil containing protein kinase 1 (ROCK1) was identified as a novel target of miR‑144 in MG‑63 osteosarcoma cells. Furthermore, knockdown of ROCK1 suppressed the proliferation, migration and invasion of MG‑63 osteosarcoma cells to a similar extent to the effects of miR‑144 overexpression. In addition, the mRNA expression of ROCK1 was increased in osteosarcoma tissues and was negatively correlated with the expression of miR‑144. In conclusion, the results of the present study suggested that miR‑144 acts as a tumor suppressor by targeting ROCK1 in osteosarcoma.

Park GB, Hur DY, Kim D
Combining CAL-101 with Celecoxib Enhances Apoptosis of EBV-transformed B-Cells Through MAPK-induced ER Stress.
Anticancer Res. 2015; 35(5):2699-708 [PubMed] Related Publications
BACKGROUND: Phosphoinositide-3 kinase (PI3K) inhibition attenuates proliferation and survival in B-cell malignancies. Celecoxib induces endoplasmic reticulum (ER) stress-induced apoptosis via a cyclo-oxgenase-2 (COX2)-independent manner in certain types of cancer cells. In the present study, we assessed the effects of combinations of drugs with a p110δ-specific inhibitor, CAL-101, and celecoxib to induce apoptosis in Epstein-Barr virus (EBV)-transformed B-cells and non-Hodgkin's lymphoma (NHL) cells.
MATERIALS AND METHODS: The apoptotic effect of combination treatment with CAL-101 and celecoxib on B-cell malignancies was determined by flow cytometry and immunoblotting.
RESULTS: Exposure to CAL-101 and celecoxib significantly increased apoptosis, which was accompanied by the inactivation of AKT, Ras homolog gene family, member A (RHOA), Rho-associated coiled-coil containing protein kinase 1 (ROCK1), and ROCK2 as well as up-regulation of Phosphatase and tensin homolog (PTEN). Co-treatment with CAL-101 and celecoxib triggered the ER stress response and the down-regulation of BCL2 and BCL-XL. SB203580, SP600125, and salubrinal effectively inhibited apoptosis and attenuated expression of phosphorylated protein kinase RNA-like endoplasmic reticulum kinase (PERK) and CCAAT-enhancer-binding protein homologous protein (CHOP). Levels of apoptosis signal-regulating kinase 1 (ASK1) were also increased after treatment with CAL-101 and celecoxib.
CONCLUSION: The apoptosis of EBV-transformed B-cells and NHL cells caused by CAL-101 and celecoxib might be related to inhibiting the RHOA/ROCK pathway and might also be associated with mitogen-activated protein kinase (MAPK)-mediated ER stress.

Neychev V, Straughan D, Pacak K, Kebebew E
Multidisciplinary management of locally advanced and widely metastatic paraganglioma in a patient with life-threatening compressive symptoms.
Head Neck. 2015; 37(12):E205-8 [PubMed] Related Publications
BACKGROUND: Patients presenting with locally advanced, metastatic paraganglioma with life-threatening compressive symptoms of critical anatomic structure pose a significant management challenge.
METHODS: We present a case of a 15-year-old patient with enlarging right neck mass causing dysphagia and respiratory compromise from near complete obstruction of the oropharynx.
RESULTS: Evaluation of the patient's family history led to the identification of a mutation in the succinate dehydrogenase subunit B (SDSD) gene (G725A). Laboratory and imaging workup revealed an 8.8 × 6.6 × 4.1 cm metabolically and biochemically active right neck mass, a tumor in the left para-aortic region, and multiple bony lesions consistent with widely metastatic disease. Multidisciplinary management included preoperative clinical optimization, coil embolization, and palliative resection of the neck mass.
CONCLUSION: Although the currently available treatment options for patients with advanced metastatic paraganglioma render no survival benefit, a multidisciplinary management approach aimed at relief of tumor-related symptoms and catecholamine excess should be undertaken.

Kim WJ, Wittner BS, Amzallag A, et al.
The WTX Tumor Suppressor Interacts with the Transcriptional Corepressor TRIM28.
J Biol Chem. 2015; 290(23):14381-90 [PubMed] Article available free on PMC after 15/04/2017 Related Publications
WTX encodes a tumor suppressor implicated in the pediatric kidney cancer Wilms tumor and in mesenchymal differentiation with potentially distinct functions in the cytoplasm, at the plasma membrane, and in the nucleus. Although modulating components of the WNT signaling pathway is a proposed function for cytoplasmic and membrane-bound WTX, its nuclear properties are not well understood. Here we report that the transcriptional corepressor TRIM28 is the major binding partner for nuclear WTX. WTX interacted with the coiled coil domain of TRIM28 required for its binding to Krüppel-associated box domains of transcription factors and for its chromatin recruitment through its own coiled coil and proline-rich domains. Knockdown of endogenous WTX reduced the recruitment of TRIM28 to a chromatinized reporter sequence and its ability to repress a target transcript. In mouse embryonic stem cells where TRIM28 plays a major role in repressing endogenous retroviruses and long interspersed elements, knockdown of either TRIM28 or WTX combined with single molecule RNA sequencing revealed a highly significant shared set of differentially regulated transcripts, including derepression of non-coding repetitive sequences and their neighboring protein encoding genes (p < 1e-20). In mesenchymal precursor cells, depletion of WTX and TRIM28 resulted in analogous β-catenin-independent defects in adipogenic and osteogenic differentiation, and knockdown of WTX reduced TRIM28 binding to Pparγ promoter. Together, the physical and functional interaction between WTX and TRIM28 suggests that the nuclear fraction of WTX plays a role in epigenetic silencing, an effect that may contribute to its function as a regulator of cellular differentiation and tumorigenesis.

Wei Y, Vellanki RN, Coyaud É, et al.
CHCHD2 Is Coamplified with EGFR in NSCLC and Regulates Mitochondrial Function and Cell Migration.
Mol Cancer Res. 2015; 13(7):1119-29 [PubMed] Related Publications
UNLABELLED: Coiled-coil-helix-coiled-coil-helix domain-containing 2, a mitochondrial protein, encoded by CHCHD2 is located at chromosome 7p11.2 and proximal to the EGFR gene. Here, bioinformatic analyses revealed that CHCHD2 is consistently coamplified with EGFR in non-small cell lung carcinoma (NSCLC). In addition, CHCHD2 and EGFR protein expression levels were positively correlated and upregulated relative to normal lung in NSCLC tumor-derived xenografts. Knockdown of CHCHD2 expression in NSCLC cells attenuated cell proliferation, migration, and mitochondrial respiration. CHCHD2 protein-protein interactions were assessed by the complementary approaches of affinity purification mass spectrometry and in vivo proximity ligation. The CHCHD2 interactome includes the apparent hub proteins C1QBP (a mitochondrial protein) and YBX1 (an oncogenic transcription factor), and an overlapping set of hub-associated proteins implicated in cell regulation.
IMPLICATIONS: CHCHD2 influences mitochondrial and nuclear functions and contributes to the cancer phenotype associated with 7p11.2 amplification in NSCLC.

Huang ZL, Lin ZR, Xiao YR, et al.
High expression of TACC3 in esophageal squamous cell carcinoma correlates with poor prognosis.
Oncotarget. 2015; 6(9):6850-61 [PubMed] Article available free on PMC after 15/04/2017 Related Publications
To analyze the expression of the transforming acidic coiled-coil protein 3 (TACC3) in esophageal squamous cell carcinoma (ESCC) samples, and to identify whether TACC3 can serve as a biomarker for the diagnosis and prognosis of ESCC, qPCR, western blotting and immunohistochemistry staining (IHC) were utilized to detect the expression of TACC3. Furthermore, cell growth, colony formation, migration ability and the epithelial-mesenchymal transition markers of ESCC cells in which TACC3 were knocked-down were measured. The mRNA and protein levels of TACC3 were higher in ESCC specimens compared to non-tumorous esophageal epithelial tissues. IHC results revealed TACC3 expression was significantly correlated to differentiation (p = 0.017) and lymphoid nodal status (p = 0.028). The patients with high-expression of TACC3 had a significantly poor prognosis compared to those of low-expression (p = 0.017), especially in the patients at stages I-II (p = 0.028). Multivariate analysis indicated that TACC3 expression was an independent prognostic factor for ESCC patients (p = 0.025). Knockdown of TACC3 inhibited the ability of cell proliferation, colony formation and migration. This study first identifies TACC3 not only as a useful biomarker for diagnose and prognosis of ESCC, but also as a potential therapeutic target for patients with ESCC.

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