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Induced hyperglycemia protects rats against mercuric chloride nephrotoxicity
Abstract:
Male Sprague-Dawley rats made diabetic (n = 20) by injection of streptozotocin 65 mg/kg and weight matched controls (n = 19) were divided into unilaterally nephrectomized and intact groups prior to challenge with HgCl2 (3 mg/kg). Diabetic rats (D2, n = 9) did not show a rise in serum creatinine concentration (0.56 +/- 0.10 vs 0.48 +/- 0.10 mg/dl) after HgCl2 challenge, while control rats (C2, n = 10) had a significant (p less than 0.001) rise in serum creatinine levels (0.40 +/- 0.14 vs 2.60 +/- 0.42 mg/dl). Uninephrectomized rats (D1, n = 11) did not alter the protection afforded by diabetes (creatinine 0.69 +/- 0.14 vs 0.67 +/- 0.13 mg/dl), but control uninephrectomized rats (C1, n = 9) had a substantial rise (p less than 0.001) in serum creatinine (0.51 +/- 0.13 vs 3.81 +/- 0.72 mg/dl). We conclude that induced hyperglycemia protects rats against mercuric chloride toxicity.
Insights
Induced hyperglycemia protects rats against mercuric chloride toxicity. Diabetic rats showed no significant increase in serum creatinine after HgCl2 challenge, unlike control rats, indicating a protective effect of diabetes.
Area of Science:
- Nephrology
- Toxicology
- Endocrinology
Background:
- Diabetes mellitus is a metabolic disorder characterized by hyperglycemia.
- Mercuric chloride (HgCl2) is a nephrotoxic agent.
- Kidney function is often compromised in diabetic individuals.
Purpose of the Study:
- To investigate the effect of induced hyperglycemia on mercuric chloride (HgCl2) induced nephrotoxicity in a rat model.
- To determine if diabetes offers protection against HgCl2 toxicity.
Main Methods:
- Male Sprague-Dawley rats were induced with diabetes using streptozotocin.
- Rats were divided into diabetic and control groups, with subgroups undergoing uninephrectomy or remaining intact.
- All groups were challenged with HgCl2 (3 mg/kg), and serum creatinine levels were monitored.
Main Results:
- Diabetic rats (intact and uninephrectomized) showed no significant rise in serum creatinine post-HgCl2 challenge.
- Control rats (intact and uninephrectomized) exhibited a significant increase in serum creatinine levels after HgCl2 exposure.
- Uninephrectomy did not alter the protective effect of diabetes against HgCl2 toxicity.
Conclusions:
- Induced hyperglycemia in rats confers significant protection against acute mercuric chloride nephrotoxicity.
- The protective mechanism of hyperglycemia against HgCl2 toxicity warrants further investigation.