Isolation and cardiovascular activity of a second bradykinin-related peptide ([Arg(0),Trp(5),Leu(8)] bradykinin) from trout

被引:29
作者
Conlon, JM
LeMevel, JC
Conklin, D
Weaver, L
Duff, DW
Olson, KR
机构
[1] UNIV BRETAGNE OCCIDENTALE,LAB NEUROPHYSIOL EA 1798,UFR MED,F-29285 BREST,FRANCE
[2] UNIV NOTRE DAME,INDIANA UNIV,SCH MED,S BEND CTR MED EDUC,NOTRE DAME,IN 46556
[3] INDIANA UNIV,DEPT BIOL,S BEND,IN 46634
关键词
bradykinin; teleost; cardiovascular regulation;
D O I
10.1016/0196-9781(96)00024-1
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
Previous work has shown that incubation of heat-denatured plasma from the rainbow trout Oncorhynchus mykiss with porcine pancreatic kallikrein generates [Lys(0),Trp(5),Leu(8)] bradykinin (trout [Lys(0)]BK). We have now isolated a second BK-related peptide from kallikrein-treated trout plasma with the primary structure: Arg-Arg-Pro-Pro-Gly-Trp-Ser-Pro-Leu-Arg (trout [Arg(0)]BK). Bolus injections of both trout [Arg(0)]BK and [Lys(0)]BK (> 100 pmol/kg) into the dorsal aorta of conscious trout produced multiphasic effects on arterial blood pressure. An initial presser response of short duration (1-2 min) was followed by a fall in pressure (to below basal values in 11 out of 15 animals) and then by a sustained rise in pressure lasting up to 60 min. The maximum rise in pressure produced by trout [Arg(0)] BK (10 nmol/kg) was approximately one-fourth of the maximum rise produced by angiotensin II in the same animals. Intracerebroventricular injections of trout [Arg(0)]BK (500 pmol) into conscious trout had no effect on arterial blood pressure or heart rate. Trout [Arg(0)]BK did not affect the tension of vascular rings from trout efferent branchial and caeliacomesenteric arteries and anterior cardinal vein. Trout des[Arg(9)]BK had no effect on cardiovascular parameters, either in vivo or in vitro, indicating that the C-terminal arginine residue of the peptide is important in interaction with the trout kinin receptor(s).
引用
收藏
页码:531 / 537
页数:7
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