한국동물학회지 (The Korean Journal of Zoology)
- 제37권4호
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- Pages.437-477
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- 1994
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- 0440-2510(pISSN)
배양 인체 백혈구의 chromosome replication에 미치는 DNA hypomethylation의 영향
Hypomethvlation of DNA with 5-Azacvtidine Alters Chromosome Replication Patterns in Cultured Human Lvmphocvtes
초록
The DNA replication of human Iyrnphocvtes was studied using Bromodeo3fyuridine incorporation. The characteristic patterns of dvnamlc banding were analysed. Human chromosomal ONA was synthesized in a segmental but highly coordinated fashion. Each chromosome replicates according to its innate pattern of chromosome structure (bandinsl. R-positive bands are demonstrated as the initiation sites of DNA synthesis, and G-bnads initiate replication after it has been completed in the autosomal R-bands. Many researchers demonstrated that developmental or induced methvlation of DNA can inactivate the associated gene loci. Such DNA methylation can be reversed and specific genes reactivated by treatment with 5-azacvtidine. We treated the hvpomethvlating agent 5-azacvtidine and tested for changes of DNA replication pattern. Treatment with 5-azacytidine causes an advance in the time of replication. These observed changes in timing of replication suggest that DNA methvlation may modify regional groups of genes in concert.