BACKGROUND: The prevalence of human papillomavirus (HPV) infection in India is high. HPV infection is known to cause cervical cancer and has also been implicated in the pathogenesis of retinoblastoma (RB), a common intraocular malignant tumor of childhood which can be familial or sporadic. Despite the high incidence of RB in India, its familial form is rare. Hence this study was undertaken to investigate whether high-risk HPV types 16 and 18 are involved in the development of RB. METHODS: Formalin fixed paraffin embedded RB tissues (n = 76) including prospective cases with corresponding maternal cervical smears (n = 10) were analyzed for the presence of HPV DNA sequences. Expression of the cell cycle regulatory proteins viz; p105, p107, p30, p16, E2F-1, E2F-4, and MiB-1 was studied by immunohistochemistry (IHC) (n = 34). RESULTS: A total of 53 out of 76 (69.7%) cases were positive for HPV, of these 3 cases were positive for HPV-16, 23 for HPV-18, and 27 for both HPV-16 and -18. Of the prospective cases (n = 10) studied, five cases along with the corresponding maternal cervical cytology smear had identical HPV status. HPV-16 positive tumors were classified as well differentiated (P = 0.013). Nuclear expression of pRB2/p130 showed significant association with HPV-16 infection (P = 0.04) or dual infection of HPV-16/-18 (P = 0.02). CONCLUSIONS: Our study lends support to the hypothesis that infection of HPV-16/-18 may play an important role in the development of nonfamilial form of RB in children in India.
BACKGROUND: The prevalence of human papillomavirus (HPV) infection in India is high. HPV infection is known to cause cervical cancer and has also been implicated in the pathogenesis of retinoblastoma (RB), a common intraocular malignant tumor of childhood which can be familial or sporadic. Despite the high incidence of RB in India, its familial form is rare. Hence this study was undertaken to investigate whether high-risk HPV types 16 and 18 are involved in the development of RB. METHODS:Formalin fixed paraffin embedded RB tissues (n = 76) including prospective cases with corresponding maternal cervical smears (n = 10) were analyzed for the presence of HPV DNA sequences. Expression of the cell cycle regulatory proteins viz; p105, p107, p30, p16, E2F-1, E2F-4, and MiB-1 was studied by immunohistochemistry (IHC) (n = 34). RESULTS: A total of 53 out of 76 (69.7%) cases were positive for HPV, of these 3 cases were positive for HPV-16, 23 for HPV-18, and 27 for both HPV-16 and -18. Of the prospective cases (n = 10) studied, five cases along with the corresponding maternal cervical cytology smear had identical HPV status. HPV-16 positive tumors were classified as well differentiated (P = 0.013). Nuclear expression of pRB2/p130 showed significant association with HPV-16 infection (P = 0.04) or dual infection of HPV-16/-18 (P = 0.02). CONCLUSIONS: Our study lends support to the hypothesis that infection of HPV-16/-18 may play an important role in the development of nonfamilial form of RB in children in India.
Authors: Julia E Heck; Christina A Lombardi; Travis J Meyers; Myles Cockburn; Michelle Wilhelm; Beate Ritz Journal: Cancer Causes Control Date: 2012-07-29 Impact factor: 2.506
Authors: Julia E Heck; Negar Omidakhsh; Saeedeh Azary; Beate Ritz; Ondine S von Ehrenstein; Greta R Bunin; Arupa Ganguly Journal: BMC Cancer Date: 2015-10-19 Impact factor: 4.430
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Eddy Supriyadi; Supawan Surukrattanaskul; Shigenobu Suzuki; Karel Svojgr; Fatoumata Sylla; Gevorg Tamamyan; Deborah Tan; Alketa Tandili; Fanny F Tarrillo Leiva; Maryam Tashvighi; Bekim Tateshi; Edi S Tehuteru; Luiz F Teixeira; Kok Hoi Teh; Tuyisabe Theophile; Helen Toledano; Doan L Trang; Fousseyni Traoré; Sumalin Trichaiyaporn; Samuray Tuncer; Harba Tyau-Tyau; Ali B Umar; Emel Unal; Ogul E Uner; Steen F Urbak; Tatiana L Ushakova; Rustam H Usmanov; Sandra Valeina; Milo van Hoefen Wijsard; Adisai Varadisai; Liliana Vasquez; Leon O Vaughan; Nevyana V Veleva-Krasteva; Nishant Verma; Andi A Victor; Maris Viksnins; Edwin G Villacís Chafla; Vicktoria Vishnevskia-Dai; Tushar Vora; Antonio E Wachtel; Werner Wackernagel; Keith Waddell; Patricia D Wade; Amina H Wali; Yi-Zhuo Wang; Avery Weiss; Matthew W Wilson; Amelia D C Wime; Atchareeya Wiwatwongwana; Damrong Wiwatwongwana; Charlotte Wolley Dod; Phanthipha Wongwai; Daoman Xiang; Yishuang Xiao; Jason C Yam; Huasheng Yang; Jenny M Yanga; Muhammad A Yaqub; 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