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  • Title: Isolation, mapping, and regulated expression of the gene encoding mouse C-type natriuretic peptide.
    Author: Huang H, Acuff CG, Steinhelper ME.
    Journal: Am J Physiol; 1996 Oct; 271(4 Pt 2):H1565-75. PubMed ID: 8897953.
    Abstract:
    Genomic sequences encoding mouse C-type natriuretic peptide (CNP) were isolated from bacteriophage libraries and characterized by restriction enzyme and sequence analysis. The mouse CNP gene (Nppc) comprised at least two exons and one intron and included several cis-regulatory elements in the 5'-flanking sequence. The deduced amino acid sequence of mouse CNP-22 was identical to other mammalian CNPs. Analysis of allele distributions in interspecific back-cross and recombinant inbred strains assigned Nppc to chromosome 1. CNP transcripts were detected by ribonuclease protection analysis in brain, ovary, and uterus, with lower levels in testes and epididymus. Uterine CNP transcripts and protein were low in sexually immature mice and adults at estrus and increased at proestrus, but similar variations in ovarian CNP expression were not statistically significant. Atrial natriuretic peptide and B-type natriuretic peptide transcripts were not detected in mouse ovary or uterus. Thus CNP gene expression is regulated by tissue-specific and inducible mechanisms in female reproductive organs. Correlations between CNP expression and uterine fluid content suggest that CNP may regulate uterine fluid balance in mice and other mammals.
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