Mitochondrial DNA alterations in thyroid cancer.

Abstract:

BACKGROUND:Alterations in mitochondrial DNA have been identified in a number of solid tumor types, including gastric, head and neck, breast, colorectal, lung, and bladder carcinomas. Recently, a homopolymeric C stretch (D310) located within the noncoding D-loop of the mitochondrial genome was identified and described as a mutational hotspot. The objective of the present study was to examine a series of thyroid cancers for genetic alterations in this region. METHODS:Seventy-two (72) thyroid cancers were examined for alterations in D310 using PCR-based methods. The primary tumors tested included 35 papillary carcinomas, 18 medullary carcinomas, 9 anaplastic carcinomas, 9 follicular carcinomas, and 1 insular carcinoma. RESULTS:Alterations in D310 were observed in 2/35 papillary carcinomas (5.7%), 1/18 medullary carcinomas (5.6%), 1/9 anaplastic carcinomas (11.1%), and 1/9 follicular carcinomas (11.1%). Overall, the rate of alterations was 5/72 (6.9%). CONCLUSIONS:Mutations in the D310 region of the D-loop of mitochondrial DNA are found in thyroid tumors of varying histologic types and grades. This mutation rate is lower than the reported rate of alteration in tumors of epithelial origin, and shows no relationship to histologic grade.

journal_name

J Surg Oncol

authors

Tong BC,Ha PK,Dhir K,Xing M,Westra WH,Sidransky D,Califano JA

doi

10.1002/jso.10202

subject

Has Abstract

pub_date

2003-03-01 00:00:00

pages

170-3

issue

3

eissn

0022-4790

issn

1096-9098

journal_volume

82

pub_type

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