Vasoactive intestinal peptide as a new drug for treatment of primary pulmonary hypertension
Peptídeo intestinal vasoativo como novo fármaco para tratamento da hipertensão pulmonar primária
Petkov V, Mosgoeller W, Ziesche R, Raderer M, Stiebellehner L, Vonbank K, Funk GC, Hamilton G, Novotny C, Burian B, Block LH
J Clin Invest
Summary
This study published in the Journal of Clinical Investigation investigated for the first time the therapeutic use of vasoactive intestinal peptide (VIP) via inhalation in patients with primary pulmonary hypertension (PPH), a serious condition with limited therapeutic options. Researchers from the Medical University of Vienna administered VIP by nebulization and evaluated hemodynamic effects by right heart catheterization.
The results demonstrated that VIP inhalation produced significant selective pulmonary vasodilation, with reduction in mean pulmonary arterial pressure and pulmonary vascular resistance. Notably, there were no adverse systemic hemodynamic effects, such as hypotension or tachycardia, differentiating VIP from other vasodilators used in PPH.
- Mean pulmonary arterial pressure decreased significantly after inhalation
- Cardiac output improved without changes in systemic blood pressure
- Patients' exercise capacity showed functional improvement
- VIP demonstrated anti-remodeling vascular action beyond its vasodilator effect
The study was pioneering in demonstrating that VIP could be effectively delivered via inhalation, reaching the pulmonary vascular bed with remarkable selectivity. The authors proposed that the mechanism involves not only direct vasodilation (via VPAC1/VPAC2 receptors and increased cAMP), but also antiproliferative effects on vascular smooth muscle cells, thereby addressing the underlying pathophysiology of PPH.
Related Peptide
VIP
Peptídeo Intestinal Vasoativo
28-amino acid neuropeptide with a molecular weight of approximately 3,326.82 Da. Naturally produced in the central and peripheral nervous systems, gastrointestinal tract, and pancreas. Has broad vasodilatory, anti-inflammatory, immunomodulatory, and neuroprotective actions across multiple organ systems.