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NTIS 바로가기Journal of genetic medicine, v.7 no.2, 2010년, pp.111 - 118
서을주 (울산의대 서울아산병원 진단검사의학과)
Chromosomal microarray analysis (CMA) enables the genome-wide detection of submicroscopic chromosomal imbalances with greater precision and accuracy. In most other countries, CMA is now a commonly used clinical diagnostic test, replacing conventional cytogenetics or targeted detection such as FISH o...
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핵심어 | 질문 | 논문에서 추출한 답변 |
---|---|---|
미세결손 증후군이란 무엇인가? | 500-600 band 해상도의 염색체 검사로는 5 Mb 미만의 염색체 이상을 검출하기 어렵기 때문에 5 Mb 미만의 염색체 결손을 미세결손이라고 한다. 특징적인 표현형을 나타내면서 그 원인이 특정 유전체부위의 미세결손인 질환을 미세결손 증후군이라고 하며4), 미세결손 증후군을 진단하기 위해서 원인 유전체 부위를 표적한 형광제자리부합법 (fluorescence in situ hybridization, FISH)이나 PCR 기반의 유전학적 검사를 시행한다. 이러한 표적 검사법은 검출하고자 하는 유전체 부위에 대한 결과만을 알 수 있다3, 5). | |
인간 유전체의 크기는 어느정도인가? | 인간 유전체의 크기가 3,100 Mb (http://www.ncbi. | |
분열중기 comparative genomic hybridization 기법의 단점은 무엇인가? | Test 세포와 re-ference 세포로부터 추출한 DNA를 각각 다른 두 가지 형광으로 표지하여 정상 분열중기 염색체에 동시에 부합한 후에 염색체 지도상에 나타나는 형광 강도비로 test 게놈과 reference 게놈의 염색체 양을 상대적으로 분석함으로써 test 세포에서 염색체 특정 부위의 양적 변이를 파악할 수 있다. 그러나 분열중기 CGH는 염색대 수준의 해상도를 가지기 때문에 5 Mb 이하의 염색체 양적 변이를 검출하기 어렵다. 특정 DNA 조각들을 슬라이드상에 정렬한 microarray가 개발되기 시작하면서 1997년에 약 20종류의 표적 DNA가 고정된 유리슬라이드상에서 CGH를 시행한 matrix-based CGH가 소개되었다7). |
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