• Asian Pacific Journal of Cancer Prevention
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• 제14권2호
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• pp.1023-1026
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• 2013

Cervical cancer is the most important female gynecological cancer, the second leading cause of cancer mortality in women worldwide and the second most common cancer in Thai women. The major cause of cervical cancer is persistent infection of human papillomavirus (HPV), leading to abnormal epithelial lesions, with progression to precancerous and invasive cancer. This study was conducted to investigate the frequency and type distribution of HPV in Thai women who had abnormal cytology. HPV detection from FFPE confirmed abnormal of high grade cervical intraepithelial lesions were for SPF-10-Innogenic Line Probe Assay. HPV-positivity was detected in 320/355 cases (90.14%) and HPV-negativity in 35/355 (9.86%). HPV-positive was found 147/320 cases (41.4%) of single infection, whereas 173/320 cases (48.7%) showed the multiple HPV infection. The most common seven types were HPV-16, -52, -18, -11, -51, -31 and -33, in that order. HPV 16 and 18, the important oncogenic HPV type, were observed in 64.8% of HSIL cases. Interestingly, a high proportion of multiple infections was found in this study and more than ten types could be detected in one case. Therefore, HPV infection screening program in women is essential, particularly in Thailand. Effective primary and secondary prevention campaigns that reinforce HPV screening for HPV detection and typing may be decrease the incidence and mortality of cervical cancer in the future and may lead to significantly improve the quality of life in Thai women.

• 미생물학회지
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• 제44권4호
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• pp.346-351
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• 2008

본 연구에서는 임신진단등의 간편 현장진단(point of care test, POCT)에 주로 사용되고 있는 멤브레인 측면흐름 분석기법을 사용하여 인유두종 바이러스(Human papillomavirus, HPV)의 특정 서열을 검출할 수 있는 DNA array를 개발하였다. HPV type 6, 11, 16, 18, 31, 45에 특이적인 DNA 탐침들을 측면흐름 분석용 멤브레인 표면에 고정하고, biotin이 label된 MY09/11 primer를 사용하여 얻어진 HPV PCR 반응 결과물과 탐침 사이에 hybridization 반응을 유도하였다. 이후 streptavidin이 label된 colloidal gold가 교잡물의 biotin과 반응함으로써 DNA hybridization 결과를 육안으로 확인할 수 있었다. 본 연구를 통해 개발된 HPV DNA lateral flow membrane array는 기존의 HPV DNA chip 기법과 비교하여 경제적이고 편리하게 주요 HPV type을 확인할 수 있음을 보여주었다.

• Asian Pacific Journal of Cancer Prevention
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• 제16권18호
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• pp.8473-8477
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• 2016

Background: High risk human papilloma virus (HPV) types 16 and 18 have been proven as central causes of cervical cancer and safety and immunogenicity of HPV vaccines are sufficiently established. Knowledge and practices of HPV vaccination among medical and paramedical students is vital as these may strongly determine intention to recommend vaccination to others in the future. The present study was therefore undertaken to assess the knowledge, attitude and practices regarding cervical cancer screening and HPV vaccination among medical and paramedical students and to analyze factors influencing them. Materials and Methods: The present cross sectional study, conducted in a tertiary care teaching hospital in south India, included undergraduate students aged 18 years and above, belonging to medical, dental and nursing streams, after informed written consent. Results: Out of 957 participants, only 430 (44.9%) displayed good knowledge and only 65 (6.8%) had received HPV vaccination. Among the unvaccinated, 433 (48.54%), were not willing to take the vaccine. Concerns regarding the efficacy (30.5%), safety (26.1%) and cost of the vaccine (21.7%) were responsible for this. Age, gender, family history of malignancy and mother's education had no influence on knowledge. Compared to medical students, nursing students had better knowledge (OR-1.49, 95% CI 0.96 to 2.3, p = 0.072) and students of dentistry had poor knowledge (OR-0.50 95% CI 0.36 to 0.70, p<0.001). Conclusions: The knowledge and uptake of HPV vaccination among medical and paramedical students in India is poor. Targeted health education interventions may have huge positive impact not only on the acceptance of vaccination among them, but also on their intention to recommend the vaccine in future.

• Asian Pacific Journal of Cancer Prevention
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• 제16권13호
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• pp.5525-5529
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• 2015

Background: Currently it is believed that human papillomaviruses (HPV) are associated with the development of some oral/oropharyngeal cancers. It has been suggested that these viruses influence carcinogenesis in both smokers and non-smokers. Data on the prevalence of HPV in healthy adults are thus needed to estimate the risk of oral/oropharyngeal cancer. The aim of this study was to assess the prevalence of oral HPV in healthy female adults in Indonesia and Thailand. Materials and Methods: Healthy female students from the Faculties of Dentistry of Universitas Indonesia and Chiang Mai University were asked to participate in this pilot study. DNA was extracted from saliva specimens and screened for HPV16 and HPV18 using PCR. Results: The age, marital status and sexual experience of the subjects between the two countries were not significantly different. Eight (4%) and 4 (2%) samples were positive for HPV16 and HPV18, respectively. Fisher's Exact test found a significant difference between HPV16 positivity in subjects who were married and had sexual intercourse but not for HPV18. Conclusions: This study successfully detected presence of HPV16 and HPV18 DNA in a number of saliva samples from female dental school students. Marital status, experience of sexual intercourse and safe sexual practice are related to the possibility of finding HPV DNA finding in saliva. Dentists, physicians and other health care professionals may gain significant value from the findings of this study, which provide an understanding of the nature of HPV infection and its risk to patient health and disease.

• Asian Pacific Journal of Cancer Prevention
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• 제15권17호
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• pp.7029-7035
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• 2014

Certain types of human papillomaviruses (HPVs) are undoubtedly involved in genesis of human malignancies. HPV plays an etiological role in cervical cancer, but also in many vaginal, vulvar, anal and penile cancers, as well as head and neck cancers. In addition, a number of non-malignant diseases such as genital warts and recurrent respiratory papillomatosis are attributable to HPV. Moreover, HPV forms have detected in several other cancers including esophageal squamous cell carcinoma, lung, prostate, ovarian, breast, skin, colorectal and urinary tract cancers, but associations with etiology in these cases is controversial. The aim of this systematic assessment was to estimate the prevalence of HPV infection and HPV types in HPV-associated cancers, HPV-related non-malignant diseases and in cancers that may be associated with HPV in Iran. The present investiagtion covered 61 studies on a variety of cancers in Iranian populations. HPV prevalence was 77.5 % and 32.4% in cervical cancer and head and neck cancers, respectively. HPV was detected in 23.1%, 22.2%, 10.4%, 30.9%, 14% and 25.2% of esophageal squamous cell, lung, prostate, urinary tract cancers, breast and skin cancers, respectively. HPV16 and 18 were the most frequent HPV types in all cancers. The findings of present study imply that current HPV vaccines for cervical cancer may decrease the burden of other cancers if they are really related to HPV.

• 생명과학회지
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• 제24권9호
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• pp.1025-1029
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• 2014

자궁경부암은 전세계 여성의 사망원인 2위를 차지하며, 인유두종바이러스 감염과 상관성이 있다. 인유두종바이러스의 백신정책, 병인론, 추적관찰, 역학에서 유전형 검사는 중요하다. 후향적 연구를 위하여 파라핀 조직에서 역교잡반응을 이용하여 인유두종바이러스의 유전형을 검사하는 것은 명확하게 증명된 것은 아니다. 본 연구에서는 자궁경부암 파라핀 조직에서 역교잡반응을 사용하여 인유두종바이러스의 유전형 검사의 유용성을 평가하였다. 총 52개의 자궁경부암 파라핀 조직을 사용하여 역교잡반응을 실시하여 인유두종바이러스의 유전형을 검출하였다. 52개의 파라핀 조직중에서 32(61.5%) 건에서 인유두종바이러스가 검출되었으며, 단순감염이 27(84.4%) 건, 복합감염이 5(15.6%) 건으로 검출되었다. 단순감염에서 인유두종바이러스 유전형은 고위험군 18(8), 58(6), 16(5), 33(1), 35(1), 39(1), 56(1) 유전형과, 저위험군 11(2), 6(1), 70(1) 유전형으로 분석되었다. 복합감염에서 인유두종바이러스 유전형은 16/18(2), 18/52(1), 16/56(1), 16/18/33(1) 유전형으로 검출되었다. 본 연구를 통하여, 파라핀 조직으로 후향적 연구를 위한 인유두종바이러스 유전형 검사가 가능할 것으로 기대된다.

• Asian Pacific Journal of Cancer Prevention
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• 제16권17호
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• pp.7883-7887
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• 2015

Background: Colorectal cancer is one of the most common cancers worldwide. Viruses including human papillomavirus (HPV) have been reported to be associated with different cancers but any association with colorectal cancers remains controversial. Aim: To evaluate any association between HPV infection and adenocarcinoma of the colon and adenomatous polyps. Materials and Methods: Paraffin-embedded tissue specimens of 70 colorectal adenocarcinomas, 70 colorectal adenomatous polyps, and 70 colorectal normal tissues were subjected to DNA extraction. The quality of the extracted DNA was confirmed by amplification of a ${\beta}$-globin fragment using polymerase chain reaction (PCR). PCR using specific primers were performed to detect HPV DNA. Specific primers targeting the E6 region of the HPVs 16 and 18 were used for genotyping. Results: HPV DNA was detected in 2 (2.85%) out of 70 adenocarcinoma colorectal tissues and 4 (5.71 %) out of 70 adenomatous colorectal tissues. All normal colorectal tissues were negative for HPV DNA. HPV-16 was the most predominant genotype (5 sample) followed by HPV-18 (4 sample). Despite the above observations, statistical analyses indicated no significant differences in the frequencies of HPV positive subjects between the cancerous and normal samples. Conclusions: Although the differences observed in the frequencies of HPV positive cases in our study was not significant relative to those of control subjects, the fact of 6 positive samples among cancerous tissues, may still suggest a role of HPV in colorectal carcinogenesis. The study collectively indicated that some colorectal cancerous tissues are infected with high risk HPV genotype. The findings merit more investigation.

• Asian Pacific Journal of Cancer Prevention
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• 제14권10호
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• pp.6065-6068
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• 2013

Background: Primary aim of this study is to assess whether or not there is an increase at rate of HPV positive oropharyngeal cancers during 1996-2011 in Turkey, for comparison with prior reports from Western countries. Materials and Methods: A total of 138 newly diagnosed patients with oropharyngeal cancer were identified, 39 of which had no primary tumor specimen available and 18 patients with invalid HPV status, therefore HPV status for remaining 81 patients was evaluated. The presence and type of HPV DNA were determined with formalin-fixed paraffin embedded specimens, using an HPV DNA-based multiplex PCR assay. Associations between HPV status and clinicopathological characteristics were evaluated using a two-sample t-test for the continuous variables and the categorical variables were compared by chi-square test. Overall survival (OS) periods were calculated with Kaplan-Meier method. Results: The proportion of HPV-positive cancer has continued to increase during 2004-2011 as compared with 1996-2003. Notably, 33% (6/18) of the cases were HPV-positive in 1996-1999, 43% (9/21) in 2000-2003, 55% (11/20) in 2004-2007 and 70% (16/23) in 2008-2011. Thus, when we compared the results obtained during the 2004-2011with results of 1996-2003 period, we found that increase at HPV-positivity ratio was statistically significant (38% vs 64% p=0.012). Conclusions: This study demonstrated that HPV positive oropharyngeal cancers are increasing in Turkish patients as in the Western world.

• Asian Pacific Journal of Cancer Prevention
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• 제15권8호
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• pp.3773-3778
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• 2014

Background: The study was aimed to evaluate the prevalence and genotype distribution of HPV infection in vulvar squamous cell carcinoma (SCC) in northern Thailand and the clinicopathological difference with regard to HPV infection status. Materials and Methods: Formalin-fixed paraffin-embedded tissue samples of vulvar SCC diagnosed between January 2006 and December 2012 were collected. HPV infection was detected by nested polymerase chain reaction (PCR) with primers MY09/11 and GP5+/6+. HPV genotyping was performed using the Linear Array Genotyping Test, followed by type-specific PCR targeting the E6/E7 region of HPV16/18/52 if the Linear Array test was negative. The histologic slides of vulvar lesions and the medical records were reviewed. Results: There were 47 cases of vulvar SCC included in the study (mean patient age $57.9{\pm}13.2$ years). HPV infection was detected in 29 cases (62%), all of which had single HPV infections. HPV16 accounted for 23 (49%). The patients with HPV-positive SCC had a significantly younger mean age than those with HPV-negative tumors (52.7 years vs 66.2 years, p<0.001). There was no significant difference in tumor stage distribution with regard to the status of HPV infection. The presence of vulvar intraepithelial neoplasia (VIN) of usual type (basaloid or warty) was significantly more frequent in HPV-positive cases compared with HPV-negative cases (62% vs 6%, p<0.001), whereas differentiated-type VIN was more common in HPV-negative cases (24% vs 0%, p=0.019). Conclusions: HPV infection was detected in 62% of vulvar SCC in northern Thailand. HPV16 was the predominant genotype similar to the data reported from other regions. HPV-positive SCC occurred in younger patients compared with HPV-negative SCC, and was associated with usual-type VIN. Vaccination against HPV16/18 may potentially prevent almost one half of vulvar SCC in northern Thailand.

• Annals of Clinical Microbiology
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• 제21권4호
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• pp.86-91
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• 2018

배경: PANA RealTyper HPV kit (PANAGENE, Korea; PANA RealTyper)는 multiplex real-time PCR과 melting curve analysis를 이용하여 human papillomavirus (HPV)의 유전자형을 검출한다. 본 연구에서는 PANA Real Typer와 AdvanSure HPV GenoBlot assay (LG Life Sciences, Korea; AdvanSure assay)를 비교하였다. 방법: 자궁경부암 검진을 받은 환자에서 채취한 검체를 60개 수집하였다. AdvanSure assay와 PANA RealTyper는 고위험군 HPV 20종을 검출할 수 있다. 저위험군 HPV의 경우 AdvanSure assay는 15종을, PANA RealTyper는 2종의 유전자형을 구별할 수 있고 18종의 유전자형을 검출할 수 있다. 결과: 총 60개 중 40개 검체에서 54개의 고위험군 유전자형이 검출되었으며 18개 검체에서 20개의 저위험군 유전자형이 검출되었다. 고위험군에서 두 방법 간 일치율은 94.4-100%였다. PANA Real Typer에서만 양성으로 검출된 9개 유전자형 중 7개(HPV 16 (n=1), 39 (n=1), 52 (n=1), 58 (n=2), 68 (n=2))은 진양성으로 판별되었다. AdvanSure assay에서만 양성으로 나온 4개 유전자형 중 3개는 HPV 59였다. 저위험군에서 AdvanSure assay에서 검출된 19개 유전자형 중 HPV 6 2개, HPV 11 1개였다. HPV 6 중 한 개는 PANA RealTyper에서만 양성이었다. 결론: PANA RealTyper는 AdvanSure assay와 동등한 검출력을 보였으며, 임상 검사실에서 HPV 유전자형 검사에 유용하게 쓰일 수 있을 것으로 생각한다.