Taurine and isolated mitochondria: A concentration-response study

Document Type: Original Article

Authors

1 Pharmaceutical Sciences Research Center, Shiraz University of Medical Sciences, Shiraz Iran Department of Pharmacology and Toxicology, School of Pharmacy, Shiraz University of Medical Sciences, Shiraz, Iran

2 College of Life Sciences, Shanxi Agricultural University, Taigu, Shanxi 030801, Peoples’ Republic of China

3 Pharmaceutical Sciences Research Center, Shiraz University of Medical Sciences, Shiraz Iran

4 Department of Physiology and Pharmacology, School of Medicine, Yasuj University of Medical Sciences, Yasuj, Iran.

5 Department of Pharmacology-Toxicology, School of Pharmacy, Shiraz University of Medical Sciences, Shiraz, Iran.

6 Shiraz University of Medical Sciences, Pharmaceutical Sciences Research Center

10.30476/tips.2020.84851.1037

Abstract

Taurine (TAU) is the most abundant free amino acid in the human body. High concentrations of this amino acid are found in tissues such as the skeletal muscle, brain, and kidney. Recently, a focus has emerged on the effects of TAU on cellular mitochondria. It has been found that TAU could positively affect this organelle by enhancing mitochondrial membrane potential, increasing ATP levels, and mitigating mitochondria-mediated ROS formation. The current study aimed to evaluate the effect of a wide range of TAU concentrations (0.01 mM-1000 mM) on mitochondrial function. Mice liver mitochondria were isolated and exposed to different concentrations of TAU (30 min). Several indices, including mitochondrial depolarization, dehydrogenases activity, permeabilization, and ATP content, were monitored. It was found that TAU supplementation significantly enhanced parameters such as mitochondrial ATP levels and mitochondrial membrane potential in comparison with the control group. Moreover, TAU prevented Ca2+-induced mitochondrial permeabilization. This amino acid revealed no significant adverse effect on isolated mitochondria even at very high and supra-physiological concentrations (e.g., 100, 250, and 500 mM). These data suggest TAU as an ideal and safe agent to protect mitochondria against toxic insults or regulating cellular function in different mitochondria-linked disorders.

Keywords