백서 상부 소화기계의 발달 시기별 Telomerase 활성 및 PCNA(proliferating cell nuclear antigen)의 발현 변화

• 영문명: THE CHANGES OF TELOMERASE ACTIVITY AND PROLIFERATING CELL NUCLEAR ANTIGEN(PCNA) EXPRESSION IN THE DEVELOPMENTAL STAGES OF RAT’S UPPER DIGESTIVE SYSTEM
• 발행기관: 대한구강악안면외과학회
• 저자명: 성일용(Iel-Yong Sung) 김종렬(Jong-Ryoul Kim)
• 간행물 정보: 『대한구강악안면외과학회지』대한구강악안면외과학회지 제30권 제2호, 85~99쪽, 전체 15쪽
• 주제분류: 의약학 > 내과학
• 파일형태: PDF
• 발행일자: 2004.04.30

영문 초록

Purpose: This study observed the changes in the telomerase activity, it’s developmental regulation, PCNA expression, and their correlation in rat’s upper digestive organs during growth and aging. Materials and Methods: Upper digestive organs(buccal mucosa, gingiva, palate, submandibular and parotid glands, and tongue) were aseptically removed from Sprague-Dawley rats of fetal(gestational 20 days), growing(1, 2, 3, 5, and 7 weeks after birth) and adult(12 week old). Samples for telomerase activity were frozen on liquid nitrogen immediately after sacrifice, and stored until the use at -75℃ in order to measure it. Telomerase activity was measured by a PCR-based telomeric repeat amplication protoco(TRAP) assay and quantitated with Photometric Telo TAGGG Telomerase PCR ELISA plus(Roche Diagnostics GmbH. Mannheim. Germany). PCNA expression were measured immunohistochemistry with anti PCNA Ab-1, Clone PC10(NeoMark. California. USA). Results: 1. Telomerase activities in buccal mucosa, palate and gingiva were the highest in fetus and decreased gradually or rapidly after birth and then diminished, but In salivary gland and tongue were the highest in fetus and also high at 1 week and then decreased rapidly. 2. PCNA expression in buccal mucosa, gingiva, Tongue and salivary gland was the highest in fetus and decreased gradually and then diminished. but only in palate decreased rapidly after birth and then diminished. Conclusion: The highest telomerase activity of embryonic stage decreased rapidly after birth in ra‘t s upper digestive organs. There may be a developmental regulation of telomerase activity, but not a tissue-specific. This telomerase activity seems correlated closely with PCNA expression in rat’s upper digestive system.

키워드

Telomerase PCNA Upper digestive system