Distribution of High-Risk Human Papillomavirus Genotypes among Women with Colposcopic Diagnosis of Cervical Intraepithelial Neoplasia in Bangladesh

Background: The incidence of cervical cancer is high in Bangladesh and there is a high prevalence of preinvasive lower genital tract disease among women of reproductive age. Persistent high-risk Human Papilloma Virus (HPV) infection is the main underlying cause of cervical cancer and its precursor, cervical intraepithelial neoplasia (CIN). Objective: The aim of the study was to identify the subtypes of high-risk HPV infection among women with the colposcopic diagnosis of cervical intraepithelial neoplasia in Bangladesh. Methods: This cross-sectional observational study was conducted in the colposcopy clinic of Dhaka Medical College Hospital over a six-month period. A total of 100 participants were enrolled. Married women, between 30 - 60 years of age with colposcopically diagnosed cervical intra epithelial neoplasia were enrolled. Women with chronic illness, pregnancy, and women unable to consent were excluded from this study. After counselling, colposcopically directed punch biopsies were taken from each CIN case concurrently with high-risk HPV testing by polymerase chain reaction (PCR). Results: The mean age of the patients was 38.69 (SD ±7.76) years. CIN 1 was diagnosed in 57% of participants, while 24% had CIN II and 19% had CIN III lesions. High-risk HPV was present in 52 patients. HPV 16 was the most common identified in 28 (53.84%) and HPV 18 was the second most common with 20 (38.46%) either singly or in combination with other high-risk subtypes. The other HPV strains, HPV 31, 33, 35, 52, 56 and 58, were also detected either as mono or co-infections. Out of the 52 HPV positive cases, 29 (55.8%) had mono infection and 23 (44.2%) had co-infection with several subtypes. The highest incidence (50%) of oncogenic HPV infections was present among women aged 35 - 45 years. Risk factors associated with HPV positive cases were high parity (P 0.05), early age at marriage (P = 0.754) and early age of first child. Conclusion: This study identified a high prevalence of HPV 16 and 18 genotypes. HPV vaccination with the current 9-valent HPV vaccine, which contains HPV types 6, 11, 16, 18, 31, 33, 45, 52, and 58. Will be an effective public health measure to eradicate cervical cancer in Bangladesh.

The role of human papillomavirus in oral squamous cell carcinoma

Aim:The causative role of human papillomavirus(HPV)has been established into the aetiology of oral squamous cell carcinoma(OSCC).Some authors believe that HPV can determinate the prognosis and module treatment response from this kind of malignancies.Methods:Articles published in the last 10 years,focusing on the role of HPV in the development,molecular biology,prognosis and treatment of OSCC were reviewed.Results:Thirty-nine articles from 252 were selected,highlighting 4 meta-analysis,3 prospective and 2 retrospective studies.According to its role in the development of cervical cancer,HPV is classified into a high risk for malignant lesions subtype and a low-grade malignant lesions subtype.Epidemiology and prevalence of HPV varies according to the published data:large studies tend to have lower rates of HPV(<50%)than smaller ones(0-100%).Interestingly,HPV+patients are usually diagnosed at a younger age,mainly those with oropharyngeal tumours.There is a predilection for the oropharynx and Waldeyer ring tumours.Regarding prognosis,OSCC HPV+patients tend to have better outcome and treatment response.Conclusion:HPV divides OSCC in two types of tumours with different prognostic and therapeutic implications,with increased survival,better treatment response rates and lower risk of death and recurrences.

A review of the risk factors associated with juvenile-onset recurrent respiratory papillomatosis:genetic,immune and clinical aspects

Background Juvenile-onset recurrent respiratory papillomatosis(JoRRP)is one of the most common benign lesions of hyperplastic respiratory epithelial tissue in children and is predominantly caused by human papillomaviruses(HPVs)6 and 11.The clinical course of the disease is variable,and some patients even develop a malignancy.The purpose of this review was to summarize the related factors affecting the disease course in patients with JoRRP.Data sources We used databases,including PubMed and Google Scholar,to search for publications on factors associated with the genetic,immune,and clinical aspects of JoRRP.The most relevant articles to the scope of this review were chosen for analysis.Results Mother-to-child transmission is the most important mode of disease transmission;other factors,such as immune condition or genetic susceptibility,may be important determinants of JoRRP occurrence.Genetically,the presence of DRBI*0301 and HFV 6/11 E6/E7 is associated with a more severe disease.Immunewise,patients have an enhanced T helper 2-like response.In addition,regulatory T cells are enriched in tumors and may become one of the effective prognostic indicators.For clinical characteristics,patients infected with HPV-11 have more aggressive disease.However,compared with HPV type,age at first onset is a more important factor related to the aggressiveness of JoRRP.Furthermore,socioeconomic status may also affect the course.Conclusions Genetic,immune,and some clinical factors have been noted to play an important role in the course of JoRRP.Exploring definite influencing factors will be an important direction of research in the future.