Mechanisms of gentamicin-induced dysfunction of renal cortical mitochondria. II. Effects on mitochondrial monovalent cation transport.

نویسندگان

  • J M Weinberg
  • P G Harding
  • H D Humes
چکیده

Mitochondrial swelling techniques were used to evaluate the effects of the aminoglycoside antibiotic gentamicin on renal cortical mitochondrial monovalent cation permeability. Gentamicin behaved like EDTA to enhance energy-dependent Na+and K+-acetate uptake with a relatively greater effect on Na+-acetate uptake. MgZ+ prevented and reversed the effects of both EDTA and gentamicin. Neither agent affected energy-independent uptake of Na+ and K+-acetate. Gentamicin did not enhance energy-independent uptake of K+and Na+-nitrate. Gentamicin enhanced energy-dependent swelling in a chlorideand phosphate-containing medium as a function of the medium Na+ and K+ concentration. This effect occurred simultaneously with gentamicin-induced stimulation of State 4 respiration and was blocked by Mg2+. Gentamicin did not affect phosphate transport. The results are taken to indicate a specific action of gentamicin to enhance mitochondrial monovalent cation permeability at an Mg*+sensitive site and it is proposed that this accounts for the effects of gentamicin on mitochondrial respiration.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Toxicity mechanisms of Cigarette Smoke on Eye and Kidney using Isolated Mitochondria

Cigarette smoking is one of the main risk factors for premature human death associated to a variety of respiratory and vascular diseases, and cancer due to containing Hundreds of toxicants. Rat mitochondria were obtained by differential ultracentrifugation and incubated with different concentrations (1, 10 and 100%) of standardized cigarette smoke extract (CSE). Our results showed that cigarett...

متن کامل

Inhibitory Effects of Resveratrol against Mitochondrial Toxicity Induced by Perfluorooctanoic Acid in Isolated Liver Mitochondria of Male Rats

 Background and purpose: Resveratrol (RSV) is a naturally polyphenolic compound found in grapes and other plant sources. It has potent free radical scavenger and antioxidative properties.The aim of this study was to evaluate the protective effect of resveratrol against Perfluorooctanoic acid (PFOA) induced mitochondrial toxicity in isolated liver mitochondria. Materials and methods: Mitochondr...

متن کامل

Comparison of the Protective Effects of Curcumin and Nanocurcumin on Acrolein Induced Mitochondrial Toxicity Isolated from Rat Liver

Background and Objectives: Contact with acrolein rapidly reduces intracellular glutathione and its antioxidant capacity and causes mitochondrial dysfunction. The use of some polymeric nanocurcumin increases the stability of curcumin. In this study, the effect of these two, was investigated on acrolein-induced toxicity in mitochondria isolated from rat liver cells.   Methods: In this experiment...

متن کامل

اثرات محافظتی رسوراترول در برابر اختلال عملکرد میتوکندریایی ناشی از پاراکوات

Background and purpose: Resveratrol (RSV) is a naturally existing polyphenolic compound abundantly found in grapes and several plants. It has potent free radical scavenger and antioxidative properties with significant effects in reducing oxidative damage. Oxidative stress and mitochondrial dysfunction contribute to PQ induced tissue damage. In this study, the protective effect of RSV was invest...

متن کامل

The effect of gentamicin on calcium uptake by renal mitochondria.

The effect of the nephrotoxic aminoglycoside antibiotic, gentamicin, on calcium uptake by renal cortical mitochondria was assessed in vitro. Gentamicin was found to be a competitive inhibitor of mitochondrial Ca++ uptake. This effect displayed a dose response with a Ki of 233 microM and occurred at gentamicin concentrations below those that inhibit mitochondrial electron transport. These result...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:
  • Archives of biochemistry and biophysics

دوره 205 1  شماره 

صفحات  -

تاریخ انتشار 1980