Abstract:
:Endothelin-like immunoreactivity (-LI) was detected in the kidney, spleen, skeletal muscle, lung and in plasma of the pig. The highest tissue levels were found in the lung (1.5 +/- 0.07 pmol/g) and the lowest in the muscle (0.08 +/- 0.02 pmol/g). I.v. infusion of endothelin (20 pmol/kg/min for 20 min) increased plasma endothelin-LI from 18 +/- 3 to 628 +/- 109 pM and renal, splenic and femoral vascular resistance by 570, 430 and 50%, respectively. There was a close correlation between the increase in plasma endothelin-LI and the vasoconstrictor effects. During the infusion 92, 82 and 76% of arterial endothelin-LI was removed by the kidney, spleen and hindlimb, respectively, whereas there was no clearance over the lung or degradation in plasma. After the infusion, arterial endothelin-LI decreased with a half life of 77 s, while the renal and splenic vasoconstriction persisted for 60 min. Characterization by reversed phase HPLC revealed that endothelin-LI in plasma and tissue co-eluted with synthetic endothelin. It is concluded that endothelin has tissue specific distribution, clearance and vascular effects in the pig.
journal_name
Biochem Biophys Res Communjournal_title
Biochemical and biophysical research communicationsauthors
Pernow J,Hemsén A,Lundberg JMdoi
10.1016/0006-291x(89)92648-xsubject
Has Abstractpub_date
1989-06-15 00:00:00pages
647-53issue
2eissn
0006-291Xissn
1090-2104pii
0006-291X(89)92648-Xjournal_volume
161pub_type
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