Ovarian cancer is defined as a condition of abnormal ovarian cells growth of ovaries. It is one of most common cancer in US, according to the statistics adapted from the American Cancer Society's publication, Cancer Facts & Figures 2010, an estimated 21,880 women in the United States will be diagnosed with ovarian cancer and 13,850 deaths.
Vitamin B12, also known as cobalamin, a water-soluble vitamin, found abundantly in a variety of foods, such as fish, shellfish, meat, eggs, dairy products, etc. plays an important role in regulating the functions of nervous system and formation of blood.
Epidemiological studies, linking vitamin B12 in reduced risk of ovarian cancer have drawn into inconclusive results. Suggestion of Folate, methionine, vitamin B(6) and vitamin B(12) may influence carcinogenesis due to their roles in the one-carbon metabolism pathway. In a study among 1910 women with ovarian cancer and 1989 controls from a case-control study conducted in eastern Massachusetts and New Hampshire from 1992 to 2008, have indicated that One-carbon metabolism(metabolic network of interdependent biosynthetic pathways) related nutrients, may lower ovarian cancer risk(1). Nitrosylcobalamin (NO-Cbl), a chemotherapeutic pro-drug derived from vitamin B12 has been found effectively in antiproliferative activity against several human cancer cell lines, including ovarian carcinoma (NIH-OVCAR-3) cells, through induction of apoptosis via a death receptor/caspase-8 pathway(2). In patients with epithelial ovarian cancer under treatment of Paclitaxel (T) and Carboplatin (J) combination chemotherapy, vitamin B12 was effective in relieving symptoms of arthralgia and muscular pain(3).
Taking altogether, vitamin B12 may be effective in reduced riak and treatment of ovarian cancer, but large sample and multu centers studies to validate its effects are necessary. As always, all articles written by Kyle J. Norton are for information & education only, please consult your Doctor & Related field specialist before applying. Over doses of the vitamin may induce symptoms of toxicity, including headache, giddiness and abnormal heart functioning, etc., please make sure to follow the guideline of the Institute of Medicine of the National Academies.
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(1) Folate, vitamin B(6) , vitamin B(12) , methionine and alcohol intake in relation to ovarian cancer risk by Harris HR1, Cramer DW, Vitonis AF, DePari M, Terry KL.(PubMed)
(2) Nitrosylcobalamin promotes cell death via S nitrosylation of Apo2L/TRAIL receptor DR4 by Tang Z1, Bauer JA, Morrison B, Lindner DJ.(PubMed)
(3) [The efficacy of Shakuyaku-Kanzo-to for peripheral nerve dysfunction in paclitaxel combination chemotherapy for epithelial ovarian carcinoma].
[Article in Japanese by Fujii K1, Okamoto S, Saitoh K, Sasaki N, Takano M, Tanaka S, Kudoh K, Kita T, Tode T, Kikuchi Y.(PubMed)