인간치수세포에 Mineral Trioxide Aggregate와 수산화칼슘 제재 적용 시 유전자 발현 양상 비교
Comparison of gene expression profiles of human dental pulp cells treated with mineral trioxide aggregate and calcium hydroxide
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초록
연구목적: 이 연구에서는 mineral trioxide aggregate 제재인 white ProRoot MTA (wMTA)와 수산화칼슘 제재인 Dycal 을 인간치수세포에 적용한 후 치수세포의 분화와 증식, 석회화, 신생혈관형성(angiogenesis) 그리고 염증에 관여하는 유전자들의 발현 변화를 비교하였다. 연구 재료 및 방법: 실험군은 wMTA와 Dycal을 테플론 튜브(내경 10 mm, 길이 1 mm)에 담아 4시간 경화시킨 후 일차세포배양한 인간치수세포에 적용하였고, 대조군은 빈 튜브만을 적용하였다. 3시간, 6시간, 9시간, 24시간 후 total RNA를 추출하고 oligonucleotide microarray 방법을 통하여 유전자 발현 양상을 분석하였다. 위의 결과를 역전사 중합효소 연쇄반응(reverse transcriptase polymerase chain reaction)으로 재확인하였다. 결과: wMTA를 적용한 실험군에서 24,546개의 유전자 중 43개 유전자의 발현이 2배 이상 증가하였으며(예. BMP2,FOSB, THBS1, EDN1, IL11, COL10A1, TUFT1, HMOX1) 25개 유전자의 발현이 50% 이하로 감소하였다(예. SMAD6, TIMP2, DCN, SOCS2, CEBPD, KIAA1199). Dycal을 적용한 실험군에서 239개 유전자의 발현이 2배 이상증가하였으며(예. BMP2, BMP6, SMAD6, IL11, FOS, VEGFA, PlGF, HMOX1, SOCS2, CEBPD, KIAA1199) 358개 유전자의 발현이 50% 이하로 감소하였다(예. EDN1, FGF). 결론: wMTA를 적용한 치수세포에서는 분화와 증식 그리고 석회화에 관여하는 유전자들의 변화가 관찰되었다. Dycal을 적용한 치수세포에서는 분화와 증식 그리고 신생혈관형성에 관여하는 유전자들의 변화가 관찰되었다. 또 Dycal이 염증에 관여하는 유전자들을 더 많이 발현시키는 양상을 보였다.
Abstract
Objectives: This study investigated changes in gene expressions concerning of differentiation, proliferation,mineralization and inflammation using Human-8 expression bead arrays when white Mineral Trioxide Aggregate and calcium hydroxide-containing cement were applied in vitro to human dental pulp cells (HDPCs). Materials and Methods: wMTA (white ProRoot MTA, Dentsply) and Dycal (Dentsply Caulk) in a Teflon tube (inner diameter 10 mm, height 1 mm) were applied to HDPCs. Empty tube-applied HDPCs were used as negative control. Total RNA was extracted at 3, 6, 9 and 24 hr after wMTA and Dycal application. The results of microarray were confirmed by reverse transcriptase polymerase chain reaction. Results: Out of the 24,546 genes, 43 genes (e.g., BMP2, FOSB, THBS1, EDN1, IL11, COL10A1, TUFT1,HMOX1) were up-regulated greater than two-fold and 25 genes (e.g., SMAD6, TIMP2, DCN, SOCS2,CEBPD, KIAA1199) were down-regulated below 50% by wMTA. Two hundred thirty nine genes (e.g.,BMP2, BMP6, SMAD6, IL11, FOS, VEGFA, PlGF, HMOX1, SOCS2, CEBPD, KIAA1199) were up-regulated greater than two-fold and 358 genes (e.g., EDN1, FGF) were down-regulated below 50% by Dycal. Conclusions: Both wMTA and Dycal induced changes in gene expressions related with differentiation and proliferation of pulp cells. wMTA induced changes in gene expressions related with mineralization, and Dycal induced those related with angiogenesis. The genes related with inflammation were more expressed by Dycal than by wMTA. It was confirmed that both wMTA and Dycal were able to induce gene expression changes concerned with the pulp repair in different ways.
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