Hydrogen Sulphide Treatment Prevents Renal Ischemia-Reperfusion Injury by Inhibiting the Expression of ICAM-1 and NF-kB Concentration in Normotensive and Hypertensive Rats.

Syed F Hashmi,Edward J Johns,Chee-Yuen Gan,Ashfaq Ahmad,Tan Yong Chia,Munavvar A Sattar,Hassaan Anwer Rathore

doi:10.3390/biom11101549

Abstract

Our main objective was to investigate the effect of chronic administration of hydrogen sulphide donor (sodium hydrosulphide) on the expression of intercellular adhesion molecule-1 (ICAM-1) and concentration of nuclear factor-kappa B (NF-kB) in a renal ischemia-reperfusion injury (IRI) model of WKY and L-nitro-arginine-methyl-ester (L-NAME)-induced hypertensive rats. Sodium hydrosulphide (NaHS) was administered intraperitoneally (i.p.) for 35 days while cystathionine gamma lyase (CSE) inhibitor dL-propargylglycine (PAG) was administered at a single dose of 50 mg/kg. Animals were anesthetised using sodium pentobarbitone (60 mg/kg) and then prepared to induce renal ischemia by clamping the left renal artery for 30 min followed by 3 h of reperfusion. Pre-treatment with NaHS improved the renal functional parameters in both WKY and L-NAME-induced hypertensive rats along with reduction of blood pressure in hypertensive groups. Oxidative stress markers like malondialdehyde (MDA), total superoxide dismutase (T-SOD) and glutathione (GSH) were also improved by NaHS treatment following renal IRI. Levels of ICAM-1 and NF-kB concentration were reduced by chronic treatment with NaHS and increased by PAG administration after renal IRI in plasma and kidney. Treatment with NaHS improved tubular morphology and glomerulus hypertrophy. Pre-treatment with NaHS reduced the degree of renal IRI by potentiating its antioxidant and anti-inflammatory mechanism, as evidenced by decreased NF-kB concentration and downregulation of ICAM-1 expression.

Highlights

systolic blood pressure (SBP), mean arterial pressure (MAP) and heart rate (HR) were measured on days 0, 21 and 35 with a non-invasive method in both Wistar Kyoto rats (WKY) and L-NAME-induced hypertensive rats (Table 1)
The present study resulted in two key findings: first, exogenous administration of hydrogen sulphide (H2 S) reduced the extent of ischemia-reperfusion injury (IRI) by improving antioxidant markers such as SOD and GSH and attenuating the MDA in normotensive and L-NAME-induced hypertensive rats
The results of this study indicate that exogenous administration of

Summary

Introduction

Ischemia-reperfusion injury (IRI) is a common cause of functional impairment of reperfused organs associated with increased production of reactive oxygen species (ROS). ROS during IRI induce initial inflammatory responses, which in turn results in the adhesion of leukocytes [1]. Leukocytes’ adhesion, rolling and migration to the ischemic tissues, followed by reperfusion, is initiated by initial inflammatory responses [2]. The expression of ICAM-1 on the surface of leukocytes [3] and endothelium [4] plays an important role in potentiating the initiation of inflammatory responses [5], which are involved in the pathogenesis of post-ischemic organ damage.

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Discussion

Conclusion