Abstract
본 연구는 DNA 상해유도기작을 규명하기 위하여 꼬마선충 (Caenorhabditis elegans) 으로 부터 subtraction hybridization 방법을 이용하여 자외선 유도 유전자인 UV100과 UV150을 분리하고 그 유전자 구조와 발현양상을 조사하였다. 분리한 유전자의 발현양상을 Northern hybridization 방법으로 살펴본 결과 자외선 조사 후에 최대 2배 이상의 발현 증가를 나타내었다. 이 결과 이미 밝혀진 다른 UV-inducible 유전자와 유사하게 UV100과 UV150 유전자는 자외선에 의해서만 발현이 증가됨을 알 수 있었다. 또한 분리한 유전자의 기능을 알기 위하여 RNAi 실험을 한 결과 분리한 자외선 유도유전자는 발생단계에 따라 다양한 DNA 회복기작을 나타냄을 알 수 있었다. The present study intends to characterize the DNA damage-inducible responses in Caenorhabditis elegans. To study UV-inducible responses in C. elegans, two UV-inducible cDNA clones were isolated from C. elegans by using subtration hybridization method. To investigate the expression of isolated genes, UV100 and UV150, the cellular levels of the transcript were determined by Northern blot analysis after UV-irradiation. The transcripts of isolated gene increased rapidly and reached maximum accumulation after UV-irradiation. Compared to the message levels of control, the levels of maximal increase were approximately 2 folds to UV-irradiation. These results implied that the effects of damaging agents are complex and different regulatory pathways exist for the induction of these genes. To study the function of UV100 and UV150 gene in response to UV irradiation, we carried out a RNAi experiment and investigated the UV sensivity. This result indicated that UV100 gene involved in stage-specific repair pathway or regulated by development.
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