Acute Effects of Vardenafil on Pulmonary Artery Responsiveness in Pulmonary Hypertension
Joint Authors
Ozbudak, Irem Hicran
Ozbilim, Gulay
Karasu-Minareci, Edibe
Sadan, Gulay
Source
Issue
Vol. 2012, Issue 2012 (31 Dec. 2012), pp.1-6, 6 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2012-05-02
Country of Publication
Egypt
No. of Pages
6
Main Subjects
Natural & Life Sciences (Multidisciplinary)
Medicine
Information Technology and Computer Science
Abstract EN
Phosphodiesterase type-5 (PDE-5) inhibitors are novel and important options for the treatment of pulmonary arterial hypertension (PAH).
Therefore, we aimed to examine effects of vardenafil, a PDE-5 inhibitor, on the pulmonary arteries isolated from rats with monocrotaline- (MCT-) induced pulmonary hypertension.
MCT (60 mg/kg) or its vehicle was administered by a single intraperitoneal injection to 6-week-old male Sprague Dawley rats.
Rats were sacrificed 21 days after MCT injection, and the main pulmonary arteries were isolated and then mounted in 20 mL organ baths.
Concentration-response curves for vardenafil (10−10–10−5 M) were constructed in phenylephrine- (Phe-) precontracted rings.
PAH caused marked rightward shift in the curves to vardenafil whereas maximal responses were not affected.
Inhibition of NO synthase (L-NAME, 10−4 M) or guanylyl cyclase (ODQ, 10−5 M) caused similar attenuation in responses evoked by vardenafil.
Moreover, contraction responses induced by CaCl2 (3×10−5–3×10−2 M) were significantly reduced in concentration-dependent manner by vardenafil.
In conclusion, vardenafil induced pulmonary vasodilatation via inhibition of extracellular calcium entry in addition to NO-cGMP pathway activation.
These results provide evidence that impaired arterial relaxation in PAH can be prevented by vardenafil.
Thus, vardenafil represents a valuable therapeutic approach in PAH besides other PDE-5 inhibitors.
American Psychological Association (APA)
Karasu-Minareci, Edibe& Ozbudak, Irem Hicran& Ozbilim, Gulay& Sadan, Gulay. 2012. Acute Effects of Vardenafil on Pulmonary Artery Responsiveness in Pulmonary Hypertension. The Scientific World Journal،Vol. 2012, no. 2012, pp.1-6.
https://search.emarefa.net/detail/BIM-493052
Modern Language Association (MLA)
Karasu-Minareci, Edibe…[et al.]. Acute Effects of Vardenafil on Pulmonary Artery Responsiveness in Pulmonary Hypertension. The Scientific World Journal No. 2012 (2012), pp.1-6.
https://search.emarefa.net/detail/BIM-493052
American Medical Association (AMA)
Karasu-Minareci, Edibe& Ozbudak, Irem Hicran& Ozbilim, Gulay& Sadan, Gulay. Acute Effects of Vardenafil on Pulmonary Artery Responsiveness in Pulmonary Hypertension. The Scientific World Journal. 2012. Vol. 2012, no. 2012, pp.1-6.
https://search.emarefa.net/detail/BIM-493052
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-493052