Mutations in the mitochondrial DNA D-loop region are frequent in cervical cancerReportar como inadecuado

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Cancer Cell International

, 5:34

First Online: 16 December 2005Received: 27 December 2004Accepted: 16 December 2005


BackgroundMitochondrial DNA mtDNA is known for high mutation rates caused by lack of protective histones, inefficient DNA repair systems, and continuous exposure to mutagenic effects of oxygen radicals. Alterations in the non-coding displacement D loop of mitochondrial DNA are present in many cancers. It has been suggested that the extent of mitochondrial DNA mutations might be useful in the prognosis of cancer outcome and-or the response to certain therapies. In order to investigate whether a high incidence of mutations exist in mitochondrial DNA of cervical cancer patients, we examined the frequency of mutations in the D-loop region in 19 patients of cervical cancer.

ResultsMutations, often multiple, were detected in 18 of 19 95% patients. The presence of mutations correlated with Human Papilloma Virus HPV infection in these patients. Mutations were also detected in normal samples and lymphocytes obtained from cervical cancer patients, but their frequency of occurrence was much lower as compared to the cervical cancer tissues.

ConclusionOur findings indicate that D-loop alterations are frequent in cervical cancers and are possibly caused by HPV infection. There was no association of mtDNA D-loop mutations with the histopathological grade and tumor staging.

Electronic supplementary materialThe online version of this article doi:10.1186-1475-2867-5-34 contains supplementary material, which is available to authorized users.

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Autor: Himani Sharma - Archna Singh - Chandresh Sharma - Sunesh Kumar Jain - Neeta Singh


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