Butyrate inhibits LPC-induced endothelial dysfunction by regulating nNOS-produced NO and ROS production

• Published in: Nitric oxide Vol. 138-139; pp. 42 - 50
• Main Authors: Dias, Melissa Tainan Silva, Aguilar, Edenil Costa, Campos, Gianne Paul, do Couto, Natalia Fernanda, Capettini, Luciano dos Santos Aggum, Braga, Weslley Fernandes, Andrade, Luciana de Oliveira, Alvarez-Leite, Jacqueline
• Format: Journal Article
• Language: English
• Published: United States Elsevier Inc 01-09-2023
• ISSN: 1089-8603; 1089-8611
• DOI: 10.1016/j.niox.2023.05.006

Lipids oxidation is a key risk factor for cardiovascular diseases. Lysophosphatidylcholine (LPC), the major component of oxidized LDL, is an important triggering agent for endothelial dysfunction and atherogenesis. Sodium butyrate, a short-chain fatty acid, has demonstrated atheroprotective properties. So, we evaluate the role of butyrate in LPC-induced endothelial dysfunction. Vascular response to phenylephrine (Phe) and acetylcholine (Ach) was performed in aortic rings from male mice (C57BL/6J). The aortic rings were incubated with LPC (10 μM) and butyrate (0.01 or 0.1 Mm), with or without TRIM (an nNOS inhibitor). Endothelial cells (EA.hy296) were incubated with LPC and butyrate to evaluate nitric oxide (NO) and reactive oxygen species (ROS) production, calcium influx, and the expression of total and phosphorylated nNOS and ERK½. We found that butyrate inhibited LPC-induced endothelial dysfunction by improving nNOS activity in aortic rings. In endothelial cells, butyrate reduced ROS production and increased nNOS-related NO release, by improving nNOS activation (phosphorylation at Ser1412). Additionally, butyrate prevented the increase in cytosolic calcium and inhibited ERk½ activation by LPC. In conclusion, butyrate inhibited LPC-induced vascular dysfunction by increasing nNOS-derived NO and reducing ROS production. Butyrate restored nNOS activation, which was associated with calcium handling normalization and reduction of ERK½ activation.
[Display omitted]
•Butyrate improves cell migration.•Butyrate inhibits LPC-induced ERK1/2 phosphorylation.•Butyrate restores the balance in the flow of intracellular calcium.•GPR43 regulates nitric oxide production.