Role of aspirin activated nitric oxide synthase in controlling DOCA-salt-induced hypertension in rats through the stimulation of renal r-cortexin in kidney cortex cells

Role of Aspirin in controlling hypertension

Abstract

Objectives: Because the damage of kidney tissue is associated with hypertension and impaired nitric oxide (NO) synthesis, and as aspirin is reported to stimulate the synthesis of renal r-cortexin, an anti-hypertensive protein, we investigated the role of aspirin as bolus dose on elevated blood pressure induced by deoxycorticosterone acetate (DOCA)-salt in animal model.
Methods: The chronic antihypertensive effect of aspirin on DOCA treated with ASA group of rats (n = 6) was evaluated after ingestion of 0.35 μM aspirin as a bolus dose in every 24 h using tail cuff methods. The plasma aspirin, NO, and r-cortexin levels were determined by spectrophotometric, methemoglobin, and ELISA methods, respectively. Synthesis of r-cortexin mRNA was determined. Aspirin activated nitric oxide synthase (AANOS) was purified by chromatographic methods.
Results: Our results showed after 3 h of administration of aspirin (0.35 μM) to the DOCA treated with ASA group of rats decreased the systolic blood pressure from 139.39 ± 7.36 mm of Hg to 116.57 ± 6.89 mm of Hg and diastolic blood pressure from 110.4 ± 7 mm of Hg to 86.4 ± 2.76 mm of Hg. The reduction of BPs was found to be related to the increased plasma aspirin from 0.00 μM to 0.042 μM, plasma NO from 0.4 ± 0.19 nM to 1.9 ± 0.5 nM, and cortexin levels from 64.36 ± 12.6 nM to 216.7 ± 21.3 nM. The molecular weight of purified AANOS is 18 kDa.
Conclusion: It can be concluded that aspirin possesses antihypertensive effect on blood pressure in chronic administration. Aspirin can stimulate NO synthesis through the activation of AANOS, which stimulated the production of r-cortexin in kidney cortex cells and thereby reducing elevated BP in hypertensive rats.

Keywords:

Hypertension aspirin r-cortexin nitric oxide DOCA
Uttam Kumar Maji, Tamal Kanti Ghosh, Mitali Chatterjee, Bhattacharya, S. ., Sarbashree Bank, & Jana, P. (2022). Role of aspirin activated nitric oxide synthase in controlling DOCA-salt-induced hypertension in rats through the stimulation of renal r-cortexin in kidney cortex cells: Role of Aspirin in controlling hypertension. International Journal of Health Sciences, 16(4), 39–50. Retrieved from https://ijhs.qu.edu.sa/index.php/journal/article/view/6325
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