期刊
MOLECULAR HUMAN REPRODUCTION
卷 8, 期 5, 页码 494-501出版社
OXFORD UNIV PRESS
DOI: 10.1093/molehr/8.5.494
关键词
amnion epithelial cells; extracellular matrix; genetic association; PPROM; transcriptional control
资金
- FIC NIH HHS [D43/TW01272] Funding Source: Medline
- NICHD NIH HHS [HD34612] Funding Source: Medline
Fetal membrane rupture is associated with increased expression of matrix metalloproteinase-9 (MMP-9) and matrix degradation. We have determined the functional significance of a variable number tandem repeat and a single nucleotide polymorphism (SNP) in the MMP-9 gene on promoter activity and their association with preterm premature rupture of membranes (PPROM). The 14 CA-repeat allele was a stronger promoter than the 20 CA-repeat allele in amnion epithelial cells and WISH amnion-derived cells, but in THP-1 monocyte/macropliage cells the 14 and 20 CA-repeat alleles had similar activities. An SNP at -1562 did not significantly affect promoter activity. A case-control study of African American neonates revealed that the 14 CA-repeat allele was more common in newborns delivered of mothers who had PPROM than in those delivered at term. There was no association between the -1562 SNP and PPROM. We conclude that there are cell host-dependent differences in MMP-9 promoter activity related to CA-repeat number and that fetal carriage of the 14 CA-repeat allele is associated with PPROM in African Americans.
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