흰쥐 구강안면발생과정에서 Igf-2 및 H19의 대립유전자-특이적 발현

서지정보

· 발행기관 : 대한구강악안면병리학회
· 수록지 정보 : 대한구강악안면병리학회지 / 27권 / 4호
· 저자명 : 박동철, 김효분, 추정여, 조남표, 김정기

목차

I. 서 론
II. 재료 및 방법
1. 실험재료
2. 실험방법
III. 결 과
1. 흰쥐 악안면영역 발생과정에서의 Igf-2 및 H19genomic imprinting
2. 흰쥐 악안면 발생과정에서의 Igf-2 promoterspecificity의 확인
IV. 고 찰
V. 결 론
참 고 문 헌

영어초록

Insulin-like growth factor 2 (Igf-2) and H19 genes are closely linked imprinted genes which have a pivotal role in embryogenesis and fetal development. Igf-2 and H19 are coexpressed in tissues of mesodermal, endodermal and neuroectodermal origin. Rat Igf-2 has a complex structure with three promoters and a complicate imprinting mechanism having an exception of biallelic expression in the choroid plexus, leptomeninges, and fetal tissues of neuroectodermal origin. To detect the expression of maternal and paternal alleles of Igf-2 and H19 during orofacial development, fetal and neonatal hybrid rats, obtained from Wistar and Fisher interstrain rat crosses were used. We also detected the promoter-specificity of Igf-2 transcripts by primers selected from P1, P2, and P3 of Igf-2 gene. RT-PCR analysis of Igf-2 and H19 showed the monoallelic expression of Igf-2 from the paternal allele and H19 from the maternal allele in E15.5 to E19.5 orofaciall structures including the maxilla, tongue, and salivary gland. P3 promoters were active in all tested samples, whereas transcripts derived from P2 promoter arised with approximately half of the tested cases and showed variable alternation. P1 promoter was not transcribed in all tested samples. These results suggest that Igf-2 and H19 may be involved in orofacial development and exhibit parent-of-origin monoallelic expression. On the other hand, in orofaciall development, P2 and P3 promoters except for P1 promoter are transcribed with variable alternative transcripts

참고자료

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