악성 섬유성 조직구종에서 Telomerase 활성과 Telomerase RNA의 발현
Telomerase Activity and Expression of Telomerase RNA in Malignant Fibrous Histiocytoma
유진영, 강석진, 김병기,
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유진영 ( Yoo Jin-Young )
가톨릭대학교 의과대학 임상병리학교실
강석진 ( Kang Seok-Jin )
가톨릭대학교 의과대학 임상병리학교실
김병기 ( Kim Byung-Kee )
가톨릭대학교 의과대학 임상병리학교실
KMID : 0357920000340080581
Abstract
Telomerase is an RNA-dependent DNA polymerase that synthesizes TTAGGG telomeric DNA onto chromosomal ends to compensate for sequence loss during replication. It has been detected in a variety of human malignancies, suggesting that such activity may play a role in the tumorigenic process. To determine whether telomerase is reactivated in malignant fibrous histiocytoma, 12 tissue samples with this tumor were analyzed for the telomerase activity by a radioactive PCR-based TRAP (telomeric repeat amplification protocol) assay. All of the tumors were further investigated for the expression of human telomerase RNA (hTR) by an in situ hybridization (ISH). Telomerase activity was detected in one (8.3%) sample. Expression of hTR was demonstrated in 7 (58.3%): one telomerase-positive and six telomerase-negatives. These data indicate that the reactivation of telomerase is an uncommon event and not an important factor involved in tumorigenesis in malignant fibrous histiocytoma. It is noteworthy that 50% of the patients with grade 2 tumors expressed hTR, suggesting that telomerase RNA may be useful as a marker for identifying tumor aggressiveness earlier than the conventional histopathologic grading scale.
키워드
Telomerase activity;Telomerase RNA;Malignant fibrous histiocytoma
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