Abstract:
:The process of parturition involves the complex interplay of factors that change the excitability and contractile activity of the uterus. We have compared the relative gene expression profile of myometrium from rats before parturition (21 days pregnant) and during delivery, using high-density DNA microarray. Of 8,740 sequences available in the array, a total of 3,782 were detected as present. From the sequences that were significantly altered, 59 genes were upregulated and 82 genes were downregulated. We were able to detect changes in genes described to have altered expression level at term, including connexin 43 and 26, cyclooxygenase 2, and oxytocin receptor, as well as novel genes that have been not previously associated with parturition. Quantitative real-time PCR on selected genes further confirmed the microarray data. Here we report for the first time that aquaporin5 (AQP5), a member of the aquaporin water channel family, was dramatically downregulated during parturition (approximately 100-fold by microarray and approximately 50-fold by real-time PCR). The emerging profile highlights biochemical cascades occurring in a period of approximately 36 h that trigger parturition and the initiation of myometrium reverse remodeling postpartum. The microarray analysis uncovered genes that were previously suspected to play a role in parturition. This regulation involves genes from immune/inflammatory response, steroid/lipid metabolism, calcium homeostasis, cell volume regulation, cell signaling, cell division, and tissue remodeling, suggesting the presence of multiple and redundant mechanisms altered in the process of birth.
journal_name
Physiol Genomicsjournal_title
Physiological genomicsauthors
Helguera G,Eghbali M,Sforza D,Minosyan TY,Toro L,Stefani Edoi
10.1152/physiolgenomics.00290.2007subject
Has Abstractpub_date
2009-01-08 00:00:00pages
89-97issue
2eissn
1094-8341issn
1531-2267pii
00290.2007journal_volume
36pub_type
杂志文章abstract::We previously reported that markers on rat chromosome 1 are genetically linked to blood pressure in an F(2) population derived from Dahl salt hypertension-sensitive (S) and Lewis (LEW) rats. Because there was evidence for more than one blood pressure quantitative trait locus (QTL) on chromosome 1, an initial congenic ...
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