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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Multidrug-resistant protein inhibitor and phosphodiesterase inhibitor potentiate the vasodilator effect induced by photobiomodulation in isolated aortic rings

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Author(s):
Oliveira de Moraes, Luis Henrique [1] ; Terroni, Barbara [2] ; da Silva Mayer, Nayara Formenton [1] ; Rodrigues, Gerson Jhonatan [1]
Total Authors: 4
Affiliation:
[1] Univ Fed Sao Carlos UFSCar, Dept Ciencias Fisiol, Sao Carlos, SP - Brazil
[2] Univ Estadual Paulista, Dept Ciencias Farmaceut, Araraquara, SP - Brazil
Total Affiliations: 2
Document type: Journal article
Source: Lasers in Medical Science; JUL 2021.
Web of Science Citations: 0
Abstract

A previous work indicates that the red LASER (660 nm) induces vascular relaxation by nitric oxide (NO)-dependent mechanism. NO activates soluble guanylate cyclase (sGC) which produces cGMP, the main effector in the vasodilation pathway. An interesting pharmacological strategy is to control the levels of intracellular cGMP, preventing its efflux (with multidrug-resistant protein blockers, such as MK-571), or preventing its degradation (such as sildenafil, which inhibits the enzyme responsible for cGMP degradation, the phosphodiesterase-5 PDE5). This study aimed to look for pharmacological strategies to improve vasodilation LASER effect in normotensive and hypertensive rats (l-NAME model). The vascular reactivity study was performed in isolated aortic rings from normotensive and hypertensive rats, with a single LASER application and sodium nitroprusside (SNP) treatment. In aortic rings from normotensive rats, MK-571 and sildenafil potentiated the relaxation induced by LASER, compared to control. The vasodilation induced by SNP was potentiated by MK-571 and sildenafil, compared to control. In aortic rings from hypertensive rats, vasodilation effect induced by LASER and by SNP was potentiated just by MK-571, compared to control, with no potentiation by sildenafil. In addition, it was seen that the withdrawal of nitric oxide stocks carried out by l-cysteine is capable of being reversed with the use of the SNP. The results support the evidence that the vasodilation induced by red LASER is potentiated by MK-571 and sildenafil in aortic rings from normotensive rats. However, in aortic rings from l-NAME hypertensive rats, the potentiation in vasodilation was induced just by MK-571. (AU)

FAPESP's process: 18/10588-9 - Characterization of the hypotensive effect by photobiomodulation in different hypertension animal models and pharmacological strategies to enhance this effect
Grantee:Gerson Jhonatan Rodrigues
Support Opportunities: Regular Research Grants