Hemodynamic basis for cocaine-induced pulmonary edema in dogs.
Animals; Blood Pressure/drug effects; Cardiac Output/drug effects; Cocaine/*toxicity; Coronary Circulation/drug effects; Dogs; Female; Heart Rate/drug effects; Hemodynamics/*drug effects; Male; Pulmonary Circulation/drug effects; Pulmonary Edema/chemically induced/*physiopathology; Stroke Volume/drug effects; Vascular Resistance/drug effects
We tested the hypothesis that cocaine-induced impairment of left ventricular function results in cardiogenic pulmonary edema. Mongrel dogs, anesthetized with alpha-chloralose, were injected with two doses of cocaine (5 mg/kg iv) 27 min apart. Cocaine produced transient decreases in aortic and left ventricular systolic pressures that were followed by increases exceeding control. As aortic pressure recovered, left ventricular end-diastolic, left atrial (Pla), pulmonary arterial (Ppa), and central venous pressures rose. Cardiac output and stroke volume were reduced when measured 4-5 min after cocaine administration. Peak Ppa and Pla were 31 +/- 5 (SE) mmHg (range 17-51 mmHg) and 26 +/- 5 mmHg (range 12-47 mmHg), respectively. Increases in extravascular lung water content (4.10 to 6.24 g H2O/g dry lung wt) developed in four animals in which Pla exceeded 30 mmHg. Analysis of left ventricular function curves revealed that cocaine depressed the inotropic state of the left ventricle. Cocaine-induced changes in hemodynamics spontaneously recovered and could be elicited again by the second dose of the drug. Our results show that cocaine-induced pulmonary hypertension, associated with decreased left ventricular function, produces pulmonary edema if pulmonary vascular pressures rise sufficiently.
Lang S A; Maron M B
Journal of applied physiology (Bethesda, Md. : 1985)
1991
1991-09
Article information provided for research and reference use only. All rights are retained by the journal listed under publisher and/or the creator(s).
<a href="http://doi.org/10.1152/jappl.1991.71.3.1166" target="_blank" rel="noreferrer noopener">10.1152/jappl.1991.71.3.1166</a>
4-Hydroxynonenal dependent alteration of TRPV1-mediated coronary microvascular signaling.
*4-Hydroxynonenal; *Coronary regulation; *Lipid peroxidation; *Post-translational modification; *Protein Processing; *Reactive oxygen species; *Signal Transduction; *TRPV1; Action Potentials/drug effects; Aldehydes/antagonists & inhibitors/metabolism/*pharmacology; Animal; Animals; Blood Flow Velocity; Calcium Signaling/drug effects; Capsaicin/*pharmacology; Cardiovascular Agents/*pharmacology; Coronary Circulation/drug effects; Coronary Vessels/metabolism/physiopathology; Cysteine/genetics/metabolism; Diabetes Mellitus/drug therapy/*metabolism/physiopathology; Disease Models; Femoral Artery/metabolism/physiopathology; HEK293 Cells; Humans; Inbred C57BL; Lipid Peroxidation; Male; Mice; Patch-Clamp Techniques; Post-Translational; TRPV Cation Channels/genetics/*metabolism; Vasodilation/drug effects
We demonstrated previously that TRPV1-dependent regulation of coronary blood flow (CBF) is disrupted in diabetes. Further, we have shown that endothelial TRPV1 is differentially regulated, ultimately leading to the inactivation of TRPV1, when exposed to a prolonged pathophysiological oxidative environment. This environment has been shown to increase lipid peroxidation byproducts including
DelloStritto Daniel J; Sinharoy Pritam; Connell Patrick J; Fahmy Joseph N; Cappelli Holly C; Thodeti Charles K; Geldenhuys Werner J; Damron Derek S; Bratz Ian N
Free radical biology & medicine
2016
2016-12
Article information provided for research and reference use only. All rights are retained by the journal listed under publisher and/or the creator(s).
<a href="http://doi.org/10.1016/j.freeradbiomed.2016.09.021" target="_blank" rel="noreferrer noopener">10.1016/j.freeradbiomed.2016.09.021</a>