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Gene expression of atrial natriuretic peptide in rat papillary muscle Rapid induction by mechanical loading
Author(s) -
C Jarygin,
Jörg Hänze,
Lang Re
Publication year - 1994
Publication title -
febs letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.593
H-Index - 257
eISSN - 1873-3468
pISSN - 0014-5793
DOI - 10.1016/0014-5793(94)00464-1
Subject(s) - atrial natriuretic peptide , medicine , endocrinology , papillary muscle , gene expression , messenger rna , chemistry , in vitro , biology , gene , biochemistry
The effect of mechanical stretch on protein synthesis and the expression of the gene for atrial natriuretic peptide (ANP) was examined in electrically paced, isolated papillary muscles from rat heart. Incorporation of [ 3 H]phenylalanine into protein increased only in stretched but not in unloaded muscles. Five hours of stretching increased ANP mRNA levels more than threefold as compared to freshly excised papillary muscles. A drastic fall in ANP mRNA levels was observed in unloaded muscles over this time. These data indicate that papillary muscles similar to other ventricular tissue are capable of activating ANP gene expression in response to increased load. The effect occurs in vitro and does not depend on circulating or nervous factors. The unexpected rapid induction of ANP gene expression in such a particular structure of the heart raises the possibility of local actions of ventricular ANP.