Abstract:
:Avid Na+ retention is a hallmark of liver cirrhosis. The aim of this study was to investigate whether and how bradykinin is involved in Na+ retention in rats with CCl4-induced liver cirrhosis. To this end the bradykinin B2 receptor antagonist Icatibant (HOE 140) was used. On one hand, bradykinin has a renal natriuretic action. On the other hand, bradykinin is a potent mediator of both vasodilation and microvascular leakage. Both vascular mechanisms, which are reported for cirrhosis, could cause vascular underfilling and Na+ retention by activating the renin-angiotensin-aldosterone system. Icatibant normalised Na+ retention and reduced the hyperactivity of the renin-angiotensin-aldosterone system, suggesting a bradykinin-induced vascular disturbance. Icatibant had no significant effect on the mild hypotension which developed with CCl4 treatment. However, there was indirect evidence for enhanced microvascular leakage that was strongly inhibited by Icatibant. Our experimental results demonstrate that bradykinin is a key mediator of Na+ retention in liver cirrhosis and suggest that a bradykinin-induced increase in microvascular leakage is mainly responsible.
journal_name
Eur J Pharmacoljournal_title
European journal of pharmacologyauthors
Wirth KJ,Bickel M,Hropot M,Günzler V,Heitsch H,Ruppert D,Schölkens BAdoi
10.1016/s0014-2999(97)01281-8subject
Has Abstractpub_date
1997-10-15 00:00:00pages
45-53issue
1eissn
0014-2999issn
1879-0712pii
S0014-2999(97)01281-8journal_volume
337pub_type
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