ArticleEinstein (Sao Paulo, Brazil)2019
Pharmacological characterization of the calcium influx pathways involved in nitric oxide production by endothelial cells.
Article in Einstein (Sao Paulo, Brazil), 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
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5 citing papers in PubMed, 12 citations in OpenAlex.
- Rap1A Modulates Store-Operated Calcium Entry in the Lung Endothelium: A Novel Mechanism Controlling NFAT-Mediated Vascular Inflammation and Permeability.Arteriosclerosis, thrombosis, and vascular biology · 2024Article
- Cracking the Endothelial Calcium (CaInternational journal of molecular sciences · 2023Review
- Nanoparticles for active combination radio mitigating agents of zinc coumarate and zinc caffeinate in a rat model.Environmental science and pollution research international · 2022Article
- Increased transient receptor potential canonical 3 activity is involved in the pathogenesis of detrusor overactivity by dynamic interaction with NaLaboratory investigation; a journal of technical methods and pathology · 2022Article
- Review
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2 authors at 1 institution in 1 country.
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Abstract
objectiveTo characterize the calcium influx pathways implicated in the sustained elevation of endothelial intracellular calcium concentration, required for the synthesis and release of relaxing factors.
methodsWe evaluated the effect of the newly synthesized pyrazole derivatives, described as selective inhibitors for ORAI (BTP2/Pyr2 and Pyr6) and TRPC3 (Pyr3 and Pyr10) channels, upon endothelium- and extracellular calcium-dependent relaxations stimulated by acetylcholine and thapsigargin, in pre-constricted rat thoracic aortic rings.
resultsAcetylcholine and thapsigargin responses were completely reverted by Pyr2 and Pyr6 (1 to 3μM). Pyr3 (0.3 to 3μM) caused a rapid reversal of acetylcholine (6.2±0.08mg.s-1) and thapsigargin (3.9±0.25mg.s-1) relaxations, whereas the more selective TRPC3 blocker Pyr10 (1 to 3μM) had no effect. The recently described TRPC4/5 selective blocker, ML204 (1 to 3μM), reverted completely acetylcholine relaxations, but minimally thapsigargin induced ones. Noteworthy, relaxations elicited by GSK1016790A (TRPV4 agonist) were unaffected by pyrazole compounds or ML204. After Pyr2 and Pyr6 pre-incubation, acetylcholine and thapsigargin evoked transient relaxations similar in magnitude and kinetics to those observed in the absence of extracellular calcium. Sodium nitroprusside relaxations as well as phenylephrine-induced contractions (denuded aorta) were not affected by any of pyrazole compounds (1 to 3μM).
conclusionThese observations revealed a previously unrecognized complexity in rat aorta endothelial calcium influx pathways, which result in production and release of nitric oxide. Pharmacologically distinguishable pathways mediate acetylcholine (ORAI/TRPC other than TRPC3/TRPC4 calcium-permeable channels) and thapsigargin (TRPC4 not required) induced calcium influx.
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