Hydrogen Saline Protects Kidneys from Surgery-Related Damage in Rats
- Authors
- Jie Li, Zhijian Hong, Hong Liu, Jihong Zhou, Lei Cui, Siming Yuan, Xianghua Chu, Pan Yu
- Journal
- Frontiers in Pharmacology
- Year
- 2016
- DOI
- 10.3389/fphar.2016.00106
- Study Type
- Rat
- Outcome
- Positive
- Peer Reviewed
- Yes
- Country
- China
- Health Condition
- Acute Kidney Injury
- Body System
- Renal
TL;DR
Hydrogen-rich saline solution helps protect and heal rat kidneys from damage caused by temporary blood supply interruption and restoration.
Key Finding
Hydrogen-rich saline accelerated recovery of kidney function in rats after ischemia/reperfusion injury, with treated animals showing faster decreases in blood markers of kidney damage (BUN and creatinine) and reduced cell death and inflammation compared to controls.
Summary
Researchers tested whether hydrogen-rich saline (a salt solution containing dissolved hydrogen) could protect rat kidneys from damage caused by temporarily cutting off blood flow and then restoring it—a type of injury that can occur during surgery. Rats treated with hydrogen-rich saline recovered kidney function faster and showed less cell death and inflammation compared to rats given regular saline, suggesting hydrogen may help kidneys bounce back from this type of injury.
Practical Takeaway
This rat study suggests hydrogen-rich saline may help protect kidneys from ischemia/reperfusion injury through anti-inflammatory and anti-cell-death mechanisms. However, this is early-stage animal research; human studies would be needed to determine whether these findings apply to people undergoing surgery or organ transplantation.
Abstract
Purpose: Hydrogen is a proven novel antioxidant that selectively reduces hydroxyl radicals. In this study, we investigated the effects of hydrogen-rich saline solution on the prevention of renal injury induced by ischemia/reperfusion (I/R) and on renal function recovery. Methods: A rat model of renal I/R injury was induced by 45 min occlusion of the left renal pedicle, followed by 108 h reperfusion. The right kidney was surgically removed. Then, 0.9% NaCl solution (1 ml/kg) or hydrogen-rich saline solution (HRSS; 1 ml/kg) was injected into the abdominal cavity at 4 h intervals. We assessed the influence of HRSS or control saline solution on the recovery of renal function after I/R injury. Kidney tissues were taken at different time points (24, 36, 48, 72, and 108 h after reperfusion) and frozen (-80°C). Kidney cell apoptosis was evaluated using terminal deoxynucleotidyl transferase dUTP nick end labeling (TUNEL)-positive staining. Additionally, the apoptotic factors (Bcl-2, Bax, caspase-3, caspase-9, and caspase-8) and the pro-inflammatory cytokines (IL-6 and TNF-α) were measured in the kidney tissues. Finally, serum blood urea nitrogen (BUN) and creatinine (Cr) levels were measured. Results: Histological analyses revealed a marked reduction of interstitial congestion, edema and hemorrhage in renal tissue after HRSS treatment compared to saline treatment. After I/R injury, BUN, Cr, Bcl-2, caspase-3, caspase-9, caspase-8, IL-6, and TNF-α were all significantly increased, while Bax expression was decreased. HRSS remarkably reversed these changes. Moreover, BUN and Cr decreased more rapidly in the rats treated with HRSS compared to the rats treated with control saline solution. Conclusions: HRSS showed a protective effect in the prevention of renal injury and could promote renal function recovery after I/R injury in rats. HRSS might partially exert its role through an anti-apoptotic and anti-inflammatory action in kidney cells.