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Study on the Mitochondrial Dysfunction by p53 Regulation inCeramide-induced Neuronal Cell Death

이도연 1 이현정 1 노유헌 1 윤지영 1 한인숙 1 Chung Yoon Hee 1 김경용 1 김성수 1 이원복 1

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이 논문은 대한체질인류학회 윤리위원회 회의(2020.2.27.) 결과 일부 그림이나 내용이 중복된 점이 확인되어 게재가 철회된 논문임

ABSTRACT

Ceramide induces cell death in a dose- and time-dependent manner in neuroblastoma SK-N-SH cells. To investigate the mechanism of SK-N-SH cell death by C2-ceramide, morphological features and Hoechst 33258 staining were analyzed. In these morphlogic study the cell death by ceramide showed typical apoptotic features, nuclear condensation,fragmentation, and membrane blebbing. Ceramide-induced apoptosis was accompanied by nuclear accumulation of p53. Inhibition of p53 expression with p53 antisense oligonucleotides inhibited apoptosis evoked by ceramide. Also, ceramide induced mitochondrial event, collapse of mitochondrial membrane potential (∆ψm) and interestingly, inhibition of p53 attenuated collapse of mitochondrial membrane potential, suggests that ceramide induces mitochondrial dysfunction through upregulation of p53 expression. These results suggest that ceramide-induced apoptosis is dependent upon increase in cellular p53 levels which play a critical role in the regulation of apoptotic cell death and p53 modulates mitochondrial function such as mitochondrial membrane potential level.

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