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Cervical cancer pathogenesis is associated with one-carbon metabolism

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Abstract

Cervical cancer is the most common cancer among women in India and a leading cause of death in these women. Most cases of cervical cancer are associated with human papillomavirus (HPV) infection of the high-risk type. It has been reported that aberrant DNA methylation can be associated with HPV infection and cervical cancer, and folate is directly involved in DNA methylation via one-carbon metabolism. We aimed to study the importance of one-carbon metabolism in the progression of cervical carcinogenesis by examining serum levels of vitamin B12 (cobalamin), homocysteine, and folate and DNA methylation of tumor suppressor genes CDH1, HIC1, and Retinoic acid receptor beta (RARβ) amid these women ranging from normal to squamous intraepithelial neoplastic lesions (SIL) to cervical cancer. Blood and tissue samples were collected from normal (n = 35), SILs (n = 27), and cervical cancer patients (n = 38) in the age group of 26–70 years. Measurement of serum vitamin B12, folate, and homocysteine were done using kits (Immulite). Promoter methylation was examined using methylation-specific PCR. The frequency of promoter hypermethylation for all the three tumor suppressor genes CDH1, HIC1, and RARβ showed an increasing trend from normal to dysplastic to invasive cervical cancer (p < 0.05). We observed that lower folate and vitamin B12 status were associated with HPV infection. Taken together, our findings suggest a role of folate and vitamin B12 in modulating the risk of cervical cancer and HPV infection. CDH1, HIC1, and RARβ genes can be used as potential biomarkers of cervical cancer risk assessment.

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Authors and Affiliations

  1. Department of Biochemistry, All India Institute of Medical Sciences, Room No. 3027-A, Ansari Nagar, New Delhi, 110029, India

    Sujata Pathak & Neeta Singh

  2. Department of Obstetrics & Gynaecology, All India Institute of Medical Sciences, New Delhi, India

    Neerja Bhatla

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  1. Sujata Pathak
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  2. Neerja Bhatla
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  3. Neeta Singh
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Correspondence to Neeta Singh.

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Pathak, S., Bhatla, N. & Singh, N. Cervical cancer pathogenesis is associated with one-carbon metabolism. Mol Cell Biochem 369, 1–7 (2012). https://doi.org/10.1007/s11010-012-1362-3

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  • DOI: https://doi.org/10.1007/s11010-012-1362-3

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