Endothelin levels in experimental diabetes combined with cardiac hypertrophy.
Diabetes mellitus is associated with endothelial and cardiac dysfunction, and endothelin has been suggested to alter cardiac function by being a positive inotropic agent, modulating the Frank-Starling response, contracting the coronary arteries and inducing tissue proliferation. We investigated endothelin levels in diabetic and in healthy dogs, 1 and 3 days after placing arteriovenous shunts (8 weeks after diabetes induction) in the femoral regions. Right and left ventricular weight/body weight ratios and Nterminal- atrial natriuretic peptide were increased in shunted animals (P < 0.05). Plasma endothelin levels were comparable in healthy and diabetic dogs. Shunted circulation did not change systemic endothelin levels in healthy dogs but reduced endothelin levels in diabetic dogs. The functional significance of altered endothelin responses to acute hemodynamic burden in experimental diabetes needs further investigation.
Skoumal
Réka
R
First Department of Internal Medicine, Semmelweis University, Budapest, Hungary. sreka78@hotmail.com
Seres
Leila
L
Soós
Pál
P
Balogh
Eva
E
Kovàts
Tìmea
T
Rysa
Jaana
J
Ruskoaho
Heikki
H
Tóth
Miklós
M
Horkay
Ferenc
F
D000818:Animals; D001166:Arteriovenous Shunt, Surgical; D009320:Atrial Natriuretic Factor / Q000097:blood; D001794:Blood Pressure; D006332:Cardiomegaly / Q000150:complications / Q000378:metabolism* / Q000473:pathology / Q000503:physiopathology; D003921:Diabetes Mellitus, Experimental / Q000150:complications / Q000378:metabolism* / Q000473:pathology / Q000503:physiopathology; D004195:Disease Models, Animal; D004285:Dogs; D019332:Endothelin-1 / Q000097:blood*; D005260:Female; D008297:Male; D011498:Protein Precursors / Q000097:blood; D013997:Time Factors
D019332:Endothelin-1; C099254:N-terminal proatrial natriuretic peptide; D011498:Protein Precursors; D009320:Atrial Natriuretic Factor