Spatio-temporal expression of the trans-acting splicing factors SF2/ASF and heterogeneous ribonuclear proteins A1/A1(B) in the myometrium of the pregnant human uterus: A molecular mechanism for regulating regional protein isoform expression in vivo

Pollard, A. J., Sparey, C., Robson, S. C., Krainer, A. R., Europe-Finner, G. N. (2000) Spatio-temporal expression of the trans-acting splicing factors SF2/ASF and heterogeneous ribonuclear proteins A1/A1(B) in the myometrium of the pregnant human uterus: A molecular mechanism for regulating regional protein isoform expression in vivo. Journal of Clinical Endocrinology & Metabolism, 85 (5). pp. 1928-1936. ISSN 0021-972X

URL: http://www.ncbi.nlm.nih.gov/pubmed/10843177
DOI: 10.1210/jc.85.5.1928

Abstract

Many of the human myometrial proteins associated with uterine quiescence and the switch to coordinated contractions at the onset of labor exist as alternatively spliced isoforms. There is now extensive evidence to indicate that the nuclear concentrations of the transacting splicing regulators SF2/ASF and hnRNP A1/A1(B) are fundamental in regulating the expression of specific protein isoforms derived from alternative splicing of single precursor messenger ribonucleic acid transcripts. The question thus arose as to whether these factors were also involved in regulating the expression of specific myometrial protein species within different uterine regions during human gestation and parturition. SF2/ASF and hnRNP A1/A1(B) expression was therefore determined in paired upper (corpus) and lower segment myometrial samples taken from individual women at term/during spontaneous labor and compared with nonpregnant control samples using specific monoclonal antibodies. We report that SF2/ASF levels were substantially increased in the lower uterine region, and this was associated with a parallel decrease in levels of hnRNP A1/A1(B) during gestation. Conversely, the opposite pattern was observed within the upper uterine region during pregnancy, where hnRNP A1/A1(B) was significantly up-regulated and SF2/ASF levels were much less than those found in the lower uterine segment. The differential expression of hnRNP A1/A1(B) and SF2/ASF in the upper and lower uterine segments may have a primary role in defining the formation of specific myometrial protein species associated with the known contractile and relaxatory properties of these regions before and during parturition.

Item Type: Paper
Uncontrolled Keywords: pre-messenger-rna oxytocin receptor differential expression down-regulation sr proteins labor term cyclooxygenase-1 connexin-43 parturition
Subjects: bioinformatics > genomics and proteomics > genetics & nucleic acid processing > DNA, RNA structure, function, modification
bioinformatics > genomics and proteomics > genetics & nucleic acid processing > DNA, RNA structure, function, modification > nuclear ribonucleoprotein
bioinformatics > genomics and proteomics > genetics & nucleic acid processing > DNA, RNA structure, function, modification > pre-mRNA
bioinformatics > genomics and proteomics > genetics & nucleic acid processing > protein structure, function, modification > protein types > splicing factor
CSHL Authors:
Communities: CSHL labs > Krainer lab
Depositing User: Matt Covey
Date Deposited: 11 Dec 2013 20:13
Last Modified: 11 Dec 2013 20:13
Related URLs:
URI: http://repository.cshl.edu/id/eprint/28916

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