Effects of creatinine, creatol and methylguanidine on renal function

Area of Science:

• Nephrology
• Toxicology
• Biochemistry

Background:

• Creatinine, creatol, and methylguanidine are guanidino compounds with potential physiological and toxicological roles.
• Understanding their impact on renal function is crucial for assessing potential health risks.

Purpose of the Study:

• To investigate the effects of creatinine (Cr), creatol, and methylguanidine (MG) on renal function in normal rats.
• To clarify the pathological mechanisms underlying the administration of these compounds.

Main Methods:

• Intraperitoneal administration of Cr, creatol, or MG to normal rats.
• Monitoring of key renal function parameters, including glomerular filtration rate, renal plasma flow, and renal blood flow.
• Measurement of serum methylguanidine levels.

Main Results:

• Creatinine administration did not significantly alter renal function parameters compared to controls.
• Creatol administration led to a significant decrease in glomerular filtration rate, renal plasma flow, and renal blood flow.
• Methylguanidine administration caused further decreases in these renal functions.
• Serum methylguanidine levels were markedly elevated in rats treated with creatol or MG.

Conclusions:

• Creatinine does not appear to possess significant nephrotoxic effects at the tested dosage.
• Creatol and methylguanidine exhibit dose-dependent nephrotoxicity, evidenced by impaired renal function and elevated serum MG levels.
• High serum MG levels suggest a potential role in the observed toxic effects of creatol and MG on the kidneys.