Human Papillomavirus (HPV), Vaccination, and Cervical Cancer
Human papillomavirus (HPV) is a common cause of infection. There are over 100 different sub-types of HPV. HPV types 16 and 18 cause 70% of cervical cancers and are also linked to cancers of the anus, vulva, vagina, penis, as well as the mouth and throat. Over time these can cause cells in the cervix to change, leading to precancerous conditions - cervical intraepithelial neoplasia (CIN), with a higher risk of developing cancer. Vaccination against HPV 16, 18 and other 'high risk' types of HPV reduces the risk of developing cervical and other HPV-related cancers.Information for Patients and the Public
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MeSH term: Uterine Cervical Neoplasms
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This list of publications is regularly updated (Source: PubMed).
Human Papillomavirus types distribution among women with cervical preneoplastic, lesions and cancer in Luanda, Angola.
Pan Afr Med J. 2016; 24:268 [PubMed] Free Access to Full Article Related Publications
AIM: To determine the frequency of HPV among women with squamous intraepithelial lesions from women in Luanda, Angola.
METHODS: Study participants included women diagnosed with cytological abnormalities that voluntarily provided Pap smears (n = 64). Genomic DNA was extracted from the samples for use as templates in the PCR amplification of HPV sequences. PCR products were sequenced to determine HPV type.
RESULTS: HPV DNA was detected in 71.9% (46/64) in the samples. A higher diversity of HPV types was found in the cytological lesions, such as ASCUS and LSIL (HPV16, 6, 18, 31, 58, 66, 70 and 82, in order of frequency) than that detected for HSIL and SSC (HPV16, 18, 6 and 33). The most prevalent HPV type were: HPV16, HPV6 and HPV18.
CONCLUSION: This is the first report on HPV type diversity and frequency in woman of Angola. The results suggest that large-scale studies across Africa would improve our understanding of interrelationship between HPV infections and cervical cancer. More directly, the identification of the HPV types most prevalent suggests that women in Angola would benefit from currently available HPV vaccines.
Multiple preinvasive and invasive HPV-related lesions of the anogenital tract in a female patient with HIV infection: A case report.
Medicine (Baltimore). 2017; 96(4):e5948 [PubMed] Free Access to Full Article Related Publications
PATIENT CONCERNS: We reported the case of an HIV-positive female patient on HAART with a good virological and immunological response and with a long history of HPV-related intraepithelial and invasive lesions of the anogenital tract.
DIAGNOSES: From 1996 to 2016, this patient was diagnosed with a high grade cervical intraepithelial neoplasia; a HR-HPV positive inguinal lymph node metastasis from clinically undetectable primary squamous cell carcinoma; a HPV-related vulvar high-grade squamous intraepithelial lesion and an invasive squamous cell carcinoma of the anus.
INTERVENTIONS: All the intraepithelial and invasive lesions detected were properly treated, and subsequent follow up visits with gynecologic examination, anoscopy, pap smear and anal cytology were performed.
OUTCOMES: After a recurrence of the anal cancer and a subsequent salvage surgery with abdominoperineal resection, at the last available follow up visit no sign of disease recurrence was found.
LESSONS: This case stresses the importance of an accurate multidisciplinary follow-up in HIV-positive patients, including not only the routine medical, immunological, and virological evaluation, but also a periodical complete examination of the anogenital tract with cervicovaginal and anal cytology, colposcopy, high resolution anoscopy, and vulvar examination.
Significance of "Not Detected but Amplified" Results by Real-Time PCR Method for HPV DNA Detection.
Biomed Res Int. 2016; 2016:5170419 [PubMed] Free Access to Full Article Related Publications
Knowledge of Greek adolescents on human papilloma virus (HPV) and vaccination: A national epidemiologic study.
Medicine (Baltimore). 2017; 96(1):e5287 [PubMed] Free Access to Full Article Related Publications
Vaccines against human papillomavirus infections: protection against cancer, genital warts or both?
Clin Microbiol Infect. 2016; 22 Suppl 5:S125-S127 [PubMed] Related Publications
Identificaiton of Novel Immunogenic Human Papillomavirus Type 16 E7-Specific Epitopes Restricted to HLA-A*33;03 for Cervical Cancer Immunotherapy.
Yonsei Med J. 2017; 58(1):43-50 [PubMed] Free Access to Full Article Related Publications
MATERIALS AND METHODS: We synthesized fourteen overlapping 15-amino acid peptides and measured intracellular interferon-γ (IFN-γ) production in PBMC and CD8+ cytotoxic T lymphocytes (CTLs) after sensitization with these peptides using flow cytometry and ELISpot assay. The immunogenicity of epitopes was verified using a ⁵¹Cr release assay with SNU1299 cells.
RESULTS: Among the fourteen 15-amino acid peptides, E7₄₉₋₆₃ (RAHYNIVTFCCKCDS) demonstrated the highest IFN-γ production from peripheral blood mononuclear cells (PBMCs), and CD8+ CTLs sensitized with E7₄₉₋₆₃ showed higher cytotoxic effect against SNU1299 cells than did CD8+ CTLs sensitized with other peptides or a negative control group. Thirteen 9- or 10-amino acid overlapping peptides spanning E7₄₉₋₆₃, E7₅₀₋₅₉ (AHYNIVTFCC), and E7₅₂₋₆₁ (YNIVTFCCKC) induced significantly higher IFN-γ production and cytotoxic effects against SNU1299 cells than the other peptides and negative controls, and the cytotoxicity of E7₅₀₋₅₉- and E7₅₂₋₆₁-sensitized PBMCs was induced via the cytolytic effect of CD8+ CTLs.
CONCLUSION: We identified E7₅₀₋₅₉ and E7₅₂₋₆₁ as novel HPV 16 E7 epitopes for HLA-A*33;03. CD8+ CTL sensitized with these peptides result in an antitumor effect against cervical cancer cells. These epitopes could be useful for immune monitoring and immunotherapy for cervical cancer and HPV 16-related diseases including anal cancer and oropharyngeal cancer.
Performance of mRNA- and DNA-based high-risk human papillomavirus assays in detection of high-grade cervical lesions.
Acta Obstet Gynecol Scand. 2017; 96(1):61-68 [PubMed] Related Publications
MATERIAL AND METHODS: Two separate cervical cell samples for Aptima and HC2 testing were collected from women referred to colposcopy or a cervical follow-up visit. Altogether, 481 paired samples were analyzed and all positive samples were also tested using the Aptima HPV 16 18/45 Genotype Assay. Results from the two assays were compared directly and with stratification by histology and cytology from the same sampling visit.
RESULTS: The overall agreement between HC2 and Aptima assays was 92.9% (Kappa coefficient of 0.855). The sensitivity and specificity of the assays in detecting CIN2(+) were 92.5 and 58.2% for HC2, and 94.0 and 59.3% for Aptima, respectively. No significant differences between the assays were found (p-values >0.5). Both assays detected all CIN3 (n = 30) and carcinoma (n = 2) cases.
CONCLUSIONS: The mRNA-based Aptima assay and the extensively studied DNA-based HC2 test performed equally well in detecting high-grade cervical lesions. Our data contribute to the growing evidence base indicating that the mRNA-based Aptima assay could be used for the triage of patients with HPV-associated cervical disease.
IκB kinase b Mediating the Downregulation of p53 and p21 by Lipopolysaccharide in Human Papillomavirus 16(+) Cervical Cancer Cells.
Chin Med J (Engl). 2016 20th Nov; 129(22):2703-2707 [PubMed] Free Access to Full Article Related Publications
METHODS: Thirty-six matched specimens of cervical cancer and adjacent normal tissues were collected and analyzed in the study. The expression of IKKβ in the tissue specimens was determined by immunohistochemical staining. In addition, Western blot was used to detect the expression level changes of IKKβ, IκBα, p53, and p21 after LPS stimulated in the HPV16+ (SiHa) and HPV16- (C33A) cervical cancer cell lines. Furthermore, the effects of IKKβ inhibitor SC-514 on LPS-induced expression change of these proteins were investigated.
RESULTS: The expression of IKKβ was higher in cervical cancer than adjacent normal tissues, and there was no significant difference between tumor differentiation, size, and invasive depth with IKKβ expression. The LPS, which increased the expression level of IKKβ protein but decreased in the IκBα, p53 and p21 proteins, was illustrated in HPV16+ (SiHa) but not in HPV16- (C33A) cells. Moreover, IKKβ inhibitor SC-514 totally reversed the upregulation of IKKβ and downregulation of p53 and p21 by LPS in SiHa cells.
CONCLUSIONS: IKKβ may mediate the downregulation of p53 and p21 by LPS in HPV16+ cervical cancer cells.
Cytology at the Time of HPV: Some Things to Think about when Discussing HPV.
Acta Cytol. 2016; 60(6):527-533 [PubMed] Related Publications
Association Between Type-specific HPV Infections and hTERT DNA Methylation in Patients with Invasive Cervical Cancer.
Cancer Genomics Proteomics. 2016 11-12; 13(6):483-491 [PubMed] Free Access to Full Article Related Publications
MATERIALS AND METHODS: Eighty-seven frozen samples were analyzed for type-specific HPV infection using a GP5(+)/GP6(+) PCR-RLB assay (RLB). hTERT DNA methylation analysis was performed using a newly developed PCR-RLB-hTERT.
RESULTS: Ninety-three percent of samples were HPV-positive and fifteen different types were detected. hTERT methylation analysis of region 1 revealed no methylation in 78.8% of the samples and partial methylation in 21.2%. In region two, 68.2% showed no methylation and 31.8% showed a pattern of partial methylation. An association between the alpha 9 and alpha 7 species with a pattern of no methylation of hTERT in the region 1 was established (p=0.02 and p=0.03, respectively).
CONCLUSION: Differences in patterns of methylation of the hTERT core promoter [region 1 (nt -208 to -1) and region 2 (nt +1 to +104) relative to first ATG] are related to the HPV species present.
Prevalence of human papillomavirus infection among women presenting for cervical cancer screening in Chile, 2014-2015.
Med Microbiol Immunol. 2016; 205(6):585-594 [PubMed] Related Publications
Experience of Combined Liquid Based Cervical Cytology and High-Risk HPV mRNA for Cervical Cancer Screening in Thammasat University Hospital.
Asian Pac J Cancer Prev. 2016; 17(9):4409-4413 [PubMed] Related Publications
MATERIALS AND METHODS: This study was conducted at the Gynecologic Clinic, Thammasat University, Pathum Thani, Thailand. A total of 2,144 cases who underwent annual cervical cancer screening by co-testing (liquid based cytology and HPV testing, DNA versus mRNA) during the priod from July 2013 to June 2016 were recruited in this study.
RESULTS: Prevalence of positive high risk (HR) HPV DNA and mRNA test were 19.7 and 8.4%, respectively with a statistically significant difference. Majority of cases of abnormal cytology in this study were atypical squamous cells of undetermined significance (ASC-US). In patients with ASC-US, positive HR HPV DNA was greater than in the mRNA group (10.1 and 4.5%, p<0.001). Nonetheless, there was no significant difference in participants with cervical intraepithelial neoplasia (CIN). HPV mRNA test had slightly lower sensitivity but higher negative predictive value (NPV) than the DNA test to detect abnormal cytology during cervical cancer screening (p<0.001). Both HPV test (DNA and mRNA) had equally efficacy to detect high grade precancerous lesion or higher (CIN 2+).
CONCLUSIONS: Prevalence of HR HPV DNA and mRNA were 19.7 and 8.4 percent, respectively. NPV of HPV mRNA was higher than DNA test. Both tests had equal efficacy to detect CIN 2+ with sensitivity and specificity of 63% vs 55.7% and 83% vs 92%, respectively.
Human papillomavirus test with cytology triage in organized screening for cervical cancer.
Acta Obstet Gynecol Scand. 2016; 95(11):1220-1227 [PubMed] Related Publications
MATERIAL AND METHODS: Since 2012, 35- to 60-year-old women living in the city of Tampere have been screened with the Abbott RealTime hrHPV test. HPV-negative women are referred to the next screening round in five years. HPV-positive women are triaged with conventional cytology, and women with at least low-grade squamous intraepithelial lesion (LSIL(+) ) are referred to colposcopy. The remaining HPV-positive women are referred for re-testing after 12 months, and then all HPV-positive women are referred to colposcopy. The data from the last cohort with cytological screening (screened in 2011) is presented for comparison.
RESULTS: A total 5637 (70%) women attended the first round of HPV screening, and 369 were HPV-positive. Of them, 54 women LSIL(+) were referred to colposcopy, resulting in 16 CIN2(+) lesions found. Of the remaining HPV-positive women, 66% were still positive one year later, and were referred to colposcopy, with 18 additional CIN2(+) lesions found. The attendance rate to the last round of cytological screening was 71% (5814 women). Sixty-four women with LSIL(+) cytology were referred to colposcopy, and 11 CIN2(+) lesions were found. Of the 777 women with borderline cytology and scheduled for reflex screening in the following year, 109 (19%) had ASC-US(+) , and 57 underwent colposcopy, resulting in six additional CIN2(+) lesions found. The total detection rate of CIN2(+) was significantly higher in the HPV-screened cohort (6.0/1000 vs. 2.9/1000, p = 0.015). However, the total colposcopy rate was 4% vs. 2%, respectively (p < 0.001).
CONCLUSION: Human papillomavirus testing also seems to be more sensitive than cytology in detecting CIN2(+) lesions in the setting of a routine organized screening program, besides in the context of randomized trials. The problem of an increased colposcopy rate needs to be addressed in the future.
Age and HPV type as risk factors for HPV persistence after loop excision in patients with high grade cervical lesions: an observational study.
BMC Surg. 2016; 16(1):70 [PubMed] Free Access to Full Article Related Publications
METHODS: An observational study was conducted aiming to estimate the rate of HPV infection persistence after LEEP in patients with high grade squamous intraepithelial lesions (HSIL). Moreover, the study investigated if persistence is age related. For this reason a total of 110 patients were included between January 2010 and June 2015.
RESULTS: At 6 months after LEEP the overall HPV infection persistence rate was 40.9 %, at 12 months 20 % and at 18 months 11.8 %. Type 16 showed the highest persistence rate: 27.3 % at 6 months, 12.7 % at 12 months and 10 % at 18 months after LEEP. The persistence for HPV type 16 at 6 months after LEEP was significantly higher in the group > =36.5 years old compared to the persistence rate in the group <36.5 years old (p = 0.0027, RR = 2.75, 95 %ϵ(1.34; 5.64)) (see Table 3).
CONCLUSIONS: LEEP does not completely eradicate HPV infection. HPV persistence rate after LEEP is higher in infections with type 16 and in women older than 36.5 years.
HPV and Cervical Cancer Epidemiology - Current Status of HPV Vaccination in India.
Asian Pac J Cancer Prev. 2016; 17(8):3663-73 [PubMed] Related Publications
Genotype Distribution of Human Papillomavirus among Women with Cervical Cytological Abnormalities or Invasive Squamous Cell Carcinoma in a High-Incidence Area of Esophageal Carcinoma in China.
Biomed Res Int. 2016; 2016:1256384 [PubMed] Free Access to Full Article Related Publications
Time to viral clearance after successful conservative treatment for high-risk HPV-infected high-grade cervical intraepithelial neoplasia and early invasive squamous cervical carcinoma.
Diagn Microbiol Infect Dis. 2016; 86(3):270-272 [PubMed] Related Publications
Retrospective analysis of HPV 16/18-related disease burden using archival clinical samples.
J Cancer Res Clin Oncol. 2016; 142(11):2367-73 [PubMed] Related Publications
METHODS: A total of 49 paraffin-embedded cervical cancer biopsy sections representing patients from the northwest region of the country were collected from the tertiary care hospital for this study. Genotyping for HPV 16 and 18 was carried out through PCR. The HPV 16/18 E6 protein expression was evaluated by IHC and was compared with the clinicopathological features of cervical cancer.
RESULTS: Molecular analysis of 33 (67 %), E6-expressing paraffin-embedded cervical cancer biopsy sections revealed the presence of HPV 16 (n = 23; 47 %), HPV 18 (n = 6; 12 %) and co-infection (n = 4; 8 %) in 49 tumors through PCR. Despite the PCR-based detection of viral DNA in 37 cervical cancer samples, IHC analysis of E6 expression revealed the etiological involvement of HPV 16/18 in 33 out of 37 cervical cancer samples. Overall, there was 85 % concordance in the results of the two techniques.
CONCLUSION: IHC analysis provides more conclusive evidence regarding the etiological involvement of the viral subtypes, especially in the presence of multiple infections. About two-thirds (67 %) of cervical cancer samples were found to be caused due to HPV 16/18. Latent occurrence of HPV 16 and 18 is suggested in less than 10 % cervical cancer samples which were found to harbor viral DNA without E6 expression. Furthermore, E6 expression was found to be significantly correlated with the tumor grade.
Prevalence of HPV genotypes in cervical adenocarcinoma: a study in Greek women.
J BUON. 2016 May-Jun; 21(3):666-72 [PubMed] Related Publications
METHODS: The study group comprised 78 adenocarcinoma cases (20 in situ and 58 invasive). HPV DNA was amplified using polymerase chain reaction (PCR) and HPV genotypes were identified by reverse hybridization.
RESULTS: There was a high prevalence of HPV infection both for in situ (95%) or invasive (94.83%) adenocarcinomas, comprising also cancers of unusual morphology. HPV 16 was the commonest strain (N=57, 73.08%) followed by HPV 18 (N=28, 35.90%). Interestingly, 13 cases (16.67%) were also HPV 52 positive (as co-infection with HPV 16 or 18). All other strains with the exception of HPV 66 were found only as co-infections. No significant age difference was noted in terms of any HPV strain positivity.
CONCLUSIONS: HPV DNA was found in the large majority of cervical adenocarcinomas. As opposed to other studies, HPV 52 was the third most commonly encountered strain after HPV 16 and HPV 18. The above findings would probably be of help in decision making concerning vaccination policy for the prevention of HPV infection in Greece.
Association of human papillomavirus infection with cytology, colposcopy, histopathology, and risk factors in the development of low and high-grade lesions of the cervix.
J BUON. 2016 May-Jun; 21(3):659-65 [PubMed] Related Publications
METHODS: The study included 784 patients tested by in situ hybridization for HPV type 6/11, 16/18 and 31/33/35 infection. The participants were divided into three categories according to the presence of high squamous intraepithelial lesions (H-SIL), low squamous intraepithelial lesions (L-SIL) and benign histologic findings.
RESULTS: Patients that had L-SIL and H-SIL demonstrated a significantly higher percentage of HPV infection than patients with benign histologic findings. The percentage of H-SIL was highest in patients infected with high risk (HR)-HPV types 16/18, who had sexual intercourse before the age of 16 years, with two to five sexual partners.
CONCLUSION: Among high-grade intraepithelial neoplasia, there is a high prevalence of HR-HPV types 16/18, which is associated with the number of sexual partners and early sexual activity. There was a significant association between the presence of abnormal cytology and HR-HPV 16/18 in both groups (H-SIL and L-SIL). Benign colposcopic findings were not found in any patient with H-SIL, where no patient had only one sexual partner.
Update on the College of American Pathologists Experience With High-Risk Human Papillomavirus Proficiency Testing for Cytology.
Arch Pathol Lab Med. 2016; 140(12):1371-1374 [PubMed] Related Publications
OBJECTIVES: - To provide an update on trends in proficiency testing performance in the College of American Pathologists CHPV program during the 4-year period from 2011 through 2014 and to compare those trends with the preceding first 3 years of the program.
DESIGN: - Responses of laboratories participating in the CHPV program from 2011 through 2014 were analyzed using a nonlinear mixed model to compare different combinations of testing medium and platform.
RESULTS: - In total, 818 laboratories participated in the CHPV program at least once during the 4 years, with participation increasing during the study period. Concordance of participant responses with the target result was more than 98% (38 280 of 38 892). Overall performance with all 3 testing media-ThinPrep (Hologic, Bedford, Massachusetts), SurePath (Becton, Dickinson and Company, Franklin Lakes, New Jersey), or Digene (Qiagen, Valencia, California)-was equivalent (P = .51), and all 4 US Food and Drug Administration (FDA)-approved platforms-Hybrid Capture 2 (Qiagen), Cervista (Hologic), Aptima (Hologic), and cobas (Roche Molecular Systems, Pleasanton, California)-outperformed laboratory-developed tests, unspecified commercial kits, and other (noncommercial) methods in ThinPrep medium (P < .001). However, certain off-label combinations of platform and medium, most notably Cervista with SurePath, demonstrated suboptimal performance (P < .001).
CONCLUSIONS: - Laboratories demonstrated proficiency in using various combinations of testing media and platforms offered in the CHPV program, with statistically significant performance differences in certain combinations. These observations may be relevant in the current discussions about FDA oversight of laboratory-developed tests.
Association of human papillomavirus type 16 and its genetic variants with cervical lesion in Korea.
APMIS. 2016; 124(11):950-957 [PubMed] Related Publications
Prevalence and Associated Factors of Abnormal Cervical Cytology and HighRisk HPV DNA among Bangkok Metropolitan Women.
Asian Pac J Cancer Prev. 2016; 17(7):3147-53 [PubMed] Related Publications
AIMS: To assess the prevalence of abnormal cervical cytology and/or HPV DNA and associated factors, including sexual behavior, among Bangkok Metropolitan women.
MATERIALS AND METHODS: Thai women, aged 25to65 years old, had lived in Bangkok for ≥5 years were invited into the study. Liquidbased cervical cytology and HPV DNA tests were performed. Personal data were collected.
MAIN OUTCOMES MEASURES: Rates of abnormal cytology and/ or highrisk HPV (HRHPV) and factors associated with abnormal test(s) were studied.
RESULTS: Abnormal cytology and positive HRHPV were found in 6.3% (279/4442 women) and 6.7% (295/4428), respectively. The most common abnormal cytology was ASCUS (3.5%) while the most common HRHPV genotype was HPV 16 (1.4%) followed by HPV 52 (1.0%), HPV 58 (0.9%), and HPV 18 and HPV 51 at equal frequency (0.7%). Both tests were abnormal in 1.6% (71/4428 women). Rates of HRHPV detection were directly associated with severity of abnormal cytology: 5.4% among normal cytology and 13.0%, 30.8%, 40.0%, 39.5%, 56.3% and 100.0% among ASCUS, ASCH, AGCNOS, LSIL, HSIL, and SCC, respectively. Some 5% of women who had no HRHPV had abnormal cytology, in which 0.3% had ≥ HSIL. Factors associated with abnormal cytology or HRHPV were: age ≤40 years, education lower than (for cytology) or higher than bachelor for HRHPV), history of sexual intercourse, and sexual partners ≥2.
CONCLUSIONS: Rates for abnormal cytology and HRHPV detection were 6.3% and 6.7% HRHPV detection was directly associated with severity of abnormal cytology. Significant associated factors were age ≤40 years, lower education, history of sexual intercourse, and sexual partners ≥2.
Human Papillomavirus Genotyping Testing Practice in 2014: Results of a College of American Pathologists National Survey.
Arch Pathol Lab Med. 2016; 140(12):1364-1370 [PubMed] Related Publications
OBJECTIVE: - To investigate human papillomavirus (HPV) genotyping testing practice patterns in laboratories in 2014.
DESIGN: - Data were analyzed from the CAP HPV Genotyping Practices Supplemental Questionnaire distributed to 749 laboratories participating in the CAP Human Papillomavirus (High Risk) for Cytology Program.
RESULTS: - Six hundred four of 749 laboratories (80.6%) responded to the survey. More laboratories offered HPV genotyping testing and performed in-house HPV genotyping testing as compared to previous surveys. The Roche cobas HPV test was the most commonly used genotyping method (37.0%; 160 of 433), followed by Hologic Aptima HPV16 18/45 (26.1%; 113 of 433) and Hologic Cervista HPV16/18 (14.3%; 62 of 433). Most laboratories (287 of 399; 71.9%) offered HPV genotyping for high-risk HPV cases regardless of Papanicolaou (Pap) test results and patient age; this pattern was more common in laboratories using cobas. The remaining laboratories specifically offered testing to women with a negative Pap test result at age 30 years and older (65.2%, 73 of 112) or all ages (37.5%, 42 of 112). The median reporting rates of HPV16 and/or HPV18 positivity were 20.6%, 25.7%, 21.1%, and 57.4% for women with positive high-risk HPV adjunctive negative Pap results, atypical squamous cells of undermined significance, low-grade squamous intraepithelial lesion, and high-grade squamous lesion, respectively.
CONCLUSIONS: - Human papillomavirus genotyping testing has increased. Roche cobas and Hologic Aptima genotype methods were the most common, and laboratories using cobas usually offered genotyping regardless of Pap test result and age. The data provide a baseline and trend of HPV genotyping test practices in 2014.
Establishment and Application of a Method for High-Risk Human Papillomavirus Genotyping in Cervical Cancer Tissue.
Clin Lab. 2016; 62(6):1075-85 [PubMed] Related Publications
METHODS: Based on alignment, specific primers were designed for HPV E6/E7 genes, the sequences of which came from five5 high-risk papillomaviruses that are common in China. This enabled an E6/E7 gene detection method based on multiplex PCR to be established. E6/E7 and Li gene testing were then performed on 65 cervical cancer tissue samples. The gene copy number of HPV E6/E7 genes and the Li gene were detected from different classifications by real-time fluorescence quantitative PCR.
RESULTS: Out of the 65 cervical cancer tissue samples, 47 (72.31%) showed positive results in E6/E7 multiplex PCR, 21 (32.31%) showed positive results in the Ll gene PCR, and out of the 219 cervical exfoliate cell samples, 56 (25.57%) showed positive results in E6/E7 multiplex PCR, 21 (13.24%) showed positive results in the L1 gene PCR. There were significant differences (p < 0.05) between these two test results. Fluorescent quantitative PCR showed that the ratio of gene copy number of L1 genes and E6/E7 genes was below 1 (p < 0.05) in cervical cancer tissue, in which both the Li and E6/E7 genes coexist.
CONCLUSIONS: The established HPV multiplex PCR assay based on the design of E6/E7 gene is a specific and sensitive method for the detection and genotype of five high-risk HPVs.
Human papillomavirus oncoproteins differentially modulate epithelial-mesenchymal transition in 5-FU-resistant cervical cancer cells.
Tumour Biol. 2016; 37(10):13137-13154 [PubMed] Related Publications
A study on the predictors of Korean male students' intention to receive human papillomavirus vaccination.
J Clin Nurs. 2016; 25(21-22):3354-3362 [PubMed] Related Publications
BACKGROUND: Human papillomavirus is a sexually transmitted infectious agent causing uterine cervical, anal, and/or penile cancer and genital warts in males and females. Infection rate of human papillomavirus increases from the age when sexual intercourse first occurs. Therefore, motivation to receive human papillomavirus vaccination is needed to protect infection.
DESIGN: Cross-sectional descriptive survey was performed only in male students. They are less aware of human papillomavirus than females, because human papillomavirus vaccination has been targeted on females for preventing cervical cancer in Korea.
METHODS: Data were collected using a self-reporting questionnaire for male high school and university students sampled from a city in Korea. Human papillomavirus vaccine-related knowledge, health beliefs, demographic, and sexual history information variables relating to intentions to vaccinate were assessed.
RESULTS: The human papillomavirus vaccination rate was very low and the levels of knowledge and health beliefs were low. The significant predictors that raised the intention of human papillomavirus vaccination were a university student, experience of sexual intercourse and perceiving the benefits of human papillomavirus vaccination.
CONCLUSIONS: To promote human papillomavirus vaccination, educational programming targeting males should include health beliefs and knowledge, emphasising that vaccination is important to prevent uterine cervical cancer and to role as a preventative measure against common male diseases.
RELEVANCE TO CLINICAL PRACTICE: Male high school students should be included as a major target population for school human papillomavirus education programmes, as they are at the age of commencing sexual intercourse. In addition, public health policies including human papillomavirus vaccination in the national immunisation programme are warranted.
Immunohistochemical Evaluation of E6/E7 HPV Oncoproteins Staining in Cervical Cancer.
Anticancer Res. 2016; 36(6):3195-8 [PubMed] Related Publications
MATERIAL AND METHODS: Paraffin sections of uterine cervical cancer and 130 were analyzed. Immunohistochemical staining protocols were evaluated with tissue slides from patients with cervical dysplasia (CIN III) and squamous epithelial carcinoma tissue with HPV infection. Liver and placental tissues were used as negative controls. E6-Specific antibody (Biorbyt) was used as primary antibody. The polymer staining method and diaminobenzidine were applied for further development. Panels of E7-specific antibodies were tested. Again, the polymer staining method and diaminobenzidine were applied for further development.
RESULTS: E6-Specific antibody revealed specific and intense staining after pre-incubation of tissue slides with citrate buffer solution. Only the E7 antibody obtained from Chemicon showed intense and specific staining in patients with CIN III and squamous epithelial carcinoma tissue. Pre-incubation with proteinase K diminished non-specific reaction.
CONCLUSION: Our results revealed a useful staining protocol for the immunohistochemical evaluation of E6/E7 oncoprotein expression in uterine cervical cancer, as well as in HPV-positive oropharyngeal cancer. Advantages of this method compared to mRNA in situ hybridization of E6/E7 are the much lower costs, as well as the broader applicability in pathological practice.
Distribution of High Risk Human Papillomavirus Types in Western Kazakhstan - Retrospective Analysis of PCR Data.
Asian Pac J Cancer Prev. 2016; 17(5):2667-72 [PubMed] Related Publications
MATERIALS AND METHODS: A retrospective analysis was conducted of data obtained from PCR laboratories in 4 regional centers for the time period covering 12 months, 2013-2014, using AmpliSens® Real-Time PCR kits for HPV testing of 12 genotypes (16, 18, 31, 33, 35, 39, 45, 51, 52, 56, 58, and 59).
RESULTS: A total of 1,661 persons were HPV tested within 2013-14, but a proprotion examined for 16 and 18 genotypes only (563) was not been included for statistic analysis of distribution and ratio of the most common genotypes. Males accounted for only a small number (N=90 in total).
CONCLUSIONS: Total number of the HPV-positive appeared to be 26.0%, or 286 of N=1098. Types distribution was as follows: type 16 (10.7%), 39 (5.83%), 51 (5.27%), 31 (4.85%), 56 (4.58%), 18 (3.61%), 59 (2.64%), 58 (2.22%), 35 (1.94%), 33 (1.25%). Overall the HPV infection was highest in 16-29 years old (62.4%) and decreased with age. Total prevalence of the HR-HPVs amongst male population was 21.4% with top five types 16, 18, 39, 51, 31. Trends forcorrelations between Aktau site and type 33 (Cramer's V 0.2029), between Caucasian ethnicity and type 33 (Cramer's V .1716), and between European ethnicities in Uralsk and type 45 (Cramer's V .1752) were found. Of N 563 tested separately for 16 or 18 types, 13.6% were positive. As a whole, the distribution of 16/18 types had a ratio of 3.53:1. Given the vaccine-targeted type 16 is widely spread amongst this regional population, HPV immunization program of adolescent girls 10-13 years should be implemented appropriately.
Knowledge and Attitudes of Bangkok Metropolitan Women towards HPV and Self-Sampled HPV Testing.
Asian Pac J Cancer Prev. 2016; 17(5):2445-51 [PubMed] Related Publications
MATERIALS AND METHODS: Thai women who had lived in Bangkok for more than 5 years, aged 25-to-65 years old, were invited to join the study. Participating women were asked to a complete self-questionnaire (Thai language), with literate assistance as needed. The questionnaire was divided into 3 parts: (I) demographic data, (II) knowledge and (III) attitudes towards self-sampled HPV testing. Before proceeding to Part III of the questionnaire, a 15-minute educational video of self-sampled HPV testing was presented to all participants.
RESULTS: Among 2,810 women who answered the questionnaires, 33.7% reported that they did not know about HPV. The characteristic features of these women were older age (>50 years), lower income (<600 USD/month), unemployed status, and non-attendees at cervical cancer screening. Only small numbers of women (4.6%) responded that they had heard about self-sampled HPV testing. After having information, 59.6% would not use the self-sampled HPV testing as a method of cervical cancer screening (non-acceptance). Factors significantly associated with the non-acceptance were older age, lower income, having no knowledge about HPV or self-collected HPV testing, a perception that the testing was unreliable and a concern that they might not be able to perform it correctly.
CONCLUSIONS: Nearly half and almost all Bangkok women did not know about HPV and self-sampled HPV testing, respectively. Approximately 60% of Bangkok women refused to do the self-sampled HPV testing. Significant negative attitudes were concerns that the testing would be unreliable and a lack of confidence to perform the procedure correctly. Education about HPV and self-sampled HPV testing, ease of the procedure, or the testing models may increase rate of acceptability or positive attitudes.