Kapil Bhatia1, Pratibha Misra2, Yan Naing Soe3, M K Sibin4, H S Batra5, Divya Shelly6, Sangeetha Sampath7, Rakhi Negi8, Bhasker Mukherjee8, Rajat Jagani9. 1. Classified Specialist (Path & Biochemistry), Command Hospital (Eastern Command), Kolkata, India. 2. Professor & Head, Department of Biochemistry, Armed Forces Medical College, Pune, India. 3. Assistant Lecturer (Biochemistry), Defence Services Medical Academy, Mingalardon, Yangon, Myanmar. 4. Scientist 'C' (DRDO), Department of Biochemistry, Armed Forces Medical College, Pune, India. 5. Prof & Head (Biochemistry), Symbiosis Medical College for Women, Lavle, Pune, India. 6. Classified Specialist (Path & Oncopath), INHS Asvini, Mumbai, India. 7. Professor (Biochemistry), Command Hospital (Air Force), Bengaluru, India. 8. Associate Professor, Department of Biochemistry, Armed Forces Medical College, Pune, India. 9. Brig Med, HQ MB Area, C/o 56 APO, India.
Abstract
Background: Epigenetic modification of cancer-related genes plays a role over and above their genetic alterations and contributes to the tumor initiation and progression of breast cancer. Promoter methylation of tumor suppressor genes is one such epigenetic modification, which can be potential biomarker. In this study, promoter methylation status of p16 gene was studied in blood samples of patients with breast carcinoma. Methods: Seventy-five patients, freshly diagnosed with carcinoma of breast and 20 age and sex matched healthy control subjects were recruited for the study. DNA extracted from EDTA blood sample was bisulfite converted and subjected to methylation-specific PCR to amplify the p16 promoter region. Results: Out of 75 patients, 25 (33%) patients showed hypermethylation in promoter region of p16 gene, which was statistically significant in comparison with the control group (p < 0.05). In subgroup analysis, lymph node involvement, cancer grade, and histopathological finding did not show any difference with methylation status of p16 promoter. Conclusion: Significant hypermethylation of p16 promoter region in the blood of histopathologically proven cases of breast cancer was observed suggesting promoter hypermethylation of p16 may be a possible mechanism accounting for sporadic carcinoma of breast.
Background: Epigenetic modification of cancer-related genes plays a role over and above their genetic alterations and contributes to the tumor initiation and progression of breast cancer. Promoter methylation of tumor suppressor genes is one such epigenetic modification, which can be potential biomarker. In this study, promoter methylation status of p16 gene was studied in blood samples of patients with breast carcinoma. Methods: Seventy-five patients, freshly diagnosed with carcinoma of breast and 20 age and sex matched healthy control subjects were recruited for the study. DNA extracted from EDTA blood sample was bisulfite converted and subjected to methylation-specific PCR to amplify the p16 promoter region. Results: Out of 75 patients, 25 (33%) patients showed hypermethylation in promoter region of p16 gene, which was statistically significant in comparison with the control group (p < 0.05). In subgroup analysis, lymph node involvement, cancer grade, and histopathological finding did not show any difference with methylation status of p16 promoter. Conclusion: Significant hypermethylation of p16 promoter region in the blood of histopathologically proven cases of breast cancer was observed suggesting promoter hypermethylation of p16 may be a possible mechanism accounting for sporadic carcinoma of breast.
Authors: Ee Ming Wong; Melissa C Southey; Stephen B Fox; Melissa A Brown; James G Dowty; Mark A Jenkins; Graham G Giles; John L Hopper; Alexander Dobrovic Journal: Cancer Prev Res (Phila) Date: 2010-10-26
Authors: Xinran Xu; Marilie D Gammon; Yujing Zhang; Timothy H Bestor; Steven H Zeisel; James G Wetmur; Sylvan Wallenstein; Patrick T Bradshaw; Gail Garbowski; Susan L Teitelbaum; Alfred I Neugut; Regina M Santella; Jia Chen Journal: Breast Cancer Res Treat Date: 2008-06-03 Impact factor: 4.872
Authors: Freddie Bray; Jacques Ferlay; Isabelle Soerjomataram; Rebecca L Siegel; Lindsey A Torre; Ahmedin Jemal Journal: CA Cancer J Clin Date: 2018-09-12 Impact factor: 508.702
Authors: Christina Fitzmaurice; Tomi F Akinyemiju; Faris Hasan Al Lami; Tahiya Alam; Reza Alizadeh-Navaei; Christine Allen; Ubai Alsharif; Nelson Alvis-Guzman; Erfan Amini; Benjamin O Anderson; Olatunde Aremu; Al Artaman; Solomon Weldegebreal Asgedom; Reza Assadi; Tesfay Mehari Atey; Leticia Avila-Burgos; Ashish Awasthi; Huda Omer Ba Saleem; Aleksandra Barac; James R Bennett; Isabela M Bensenor; Nickhill Bhakta; Hermann Brenner; Lucero Cahuana-Hurtado; Carlos A Castañeda-Orjuela; Ferrán Catalá-López; Jee-Young Jasmine Choi; Devasahayam Jesudas Christopher; Sheng-Chia Chung; Maria Paula Curado; Lalit Dandona; Rakhi Dandona; José das Neves; Subhojit Dey; Samath D Dharmaratne; David Teye Doku; Tim R Driscoll; Manisha Dubey; Hedyeh Ebrahimi; Dumessa Edessa; Ziad El-Khatib; Aman Yesuf Endries; Florian Fischer; Lisa M Force; Kyle J Foreman; Solomon Weldemariam Gebrehiwot; Sameer Vali Gopalani; Giuseppe Grosso; Rahul Gupta; Bishal Gyawali; Randah Ribhi Hamadeh; Samer Hamidi; James Harvey; Hamid Yimam Hassen; Roderick J Hay; Simon I Hay; Behzad Heibati; Molla Kahssay Hiluf; Nobuyuki Horita; H Dean Hosgood; Olayinka S Ilesanmi; Kaire Innos; Farhad Islami; Mihajlo B Jakovljevic; Sarah Charlotte Johnson; Jost B Jonas; Amir Kasaeian; Tesfaye Dessale Kassa; Yousef Saleh Khader; Ejaz Ahmad Khan; Gulfaraz Khan; Young-Ho Khang; Mohammad Hossein Khosravi; Jagdish Khubchandani; Jacek A Kopec; G Anil Kumar; Michael Kutz; Deepesh Pravinkumar Lad; Alessandra Lafranconi; Qing Lan; Yirga Legesse; James Leigh; Shai Linn; Raimundas Lunevicius; Azeem Majeed; Reza Malekzadeh; Deborah Carvalho Malta; Lorenzo G Mantovani; Brian J McMahon; Toni Meier; Yohannes Adama Melaku; Mulugeta Melku; Peter Memiah; Walter Mendoza; Tuomo J Meretoja; Haftay Berhane Mezgebe; Ted R Miller; Shafiu Mohammed; Ali H Mokdad; Mahmood Moosazadeh; Paula Moraga; Seyyed Meysam Mousavi; Vinay Nangia; Cuong Tat Nguyen; Vuong Minh Nong; Felix Akpojene Ogbo; Andrew Toyin Olagunju; Mahesh Pa; Eun-Kee Park; Tejas Patel; David M Pereira; Farhad Pishgar; Maarten J Postma; Farshad Pourmalek; Mostafa Qorbani; Anwar Rafay; Salman Rawaf; David Laith Rawaf; Gholamreza Roshandel; Saeid Safiri; Hamideh Salimzadeh; Juan Ramon Sanabria; Milena M Santric Milicevic; Benn Sartorius; Maheswar Satpathy; Sadaf G Sepanlou; Katya Anne Shackelford; Masood Ali Shaikh; Mahdi Sharif-Alhoseini; Jun She; Min-Jeong Shin; Ivy Shiue; Mark G Shrime; Abiy Hiruye Sinke; Mekonnen Sisay; Amber Sligar; Muawiyyah Babale Sufiyan; Bryan L Sykes; Rafael Tabarés-Seisdedos; Gizachew Assefa Tessema; Roman Topor-Madry; Tung Thanh Tran; Bach Xuan Tran; Kingsley Nnanna Ukwaja; Vasiliy Victorovich Vlassov; Stein Emil Vollset; Elisabete Weiderpass; Hywel C Williams; Nigus Bililign Yimer; Naohiro Yonemoto; Mustafa Z Younis; Christopher J L Murray; Mohsen Naghavi Journal: JAMA Oncol Date: 2018-11-01 Impact factor: 31.777