2. Academic Validation
  3. Glutamate rescues heat stress-induced apoptosis of Sertoli cells by enhancing the activity of antioxidant enzymes and activating the Trx1-Akt pathway in vitro

Glutamate rescues heat stress-induced apoptosis of Sertoli cells by enhancing the activity of antioxidant enzymes and activating the Trx1-Akt pathway in vitro

  • Theriogenology. 2024 Apr 17:223:1-10. doi: 10.1016/j.theriogenology.2024.04.005.
Xia-Qing Cai 1,  Huan Yang 2,  Bing-Qian Liang 3,  Cheng-Chen Deng 4,  Hong-Yan Xue 5,  Jiao-Jiao Zhang 6,  Xian-Zhong Wang 7
Affiliations

Affiliations

  • 1 Chongqing Key Laboratory of Forage & Herbivore, College of Veterinary Medicine, Southwest University, Beibei, Chongqing, 400715, PR China. Electronic address: 1426331386@qq.com.
  • 2 Chongqing Key Laboratory of Forage & Herbivore, College of Veterinary Medicine, Southwest University, Beibei, Chongqing, 400715, PR China. Electronic address: 1638432002@qq.com.
  • 3 Chongqing Key Laboratory of Forage & Herbivore, College of Veterinary Medicine, Southwest University, Beibei, Chongqing, 400715, PR China. Electronic address: 2271477798@qq.com.
  • 4 Chongqing Key Laboratory of Forage & Herbivore, College of Veterinary Medicine, Southwest University, Beibei, Chongqing, 400715, PR China. Electronic address: 997982408@qq.com.
  • 5 Chongqing Key Laboratory of Forage & Herbivore, College of Veterinary Medicine, Southwest University, Beibei, Chongqing, 400715, PR China. Electronic address: 1363517080@qq.com.
  • 6 Chongqing Key Laboratory of Forage & Herbivore, College of Veterinary Medicine, Southwest University, Beibei, Chongqing, 400715, PR China. Electronic address: zhangjjff@126.com.
  • 7 Chongqing Key Laboratory of Forage & Herbivore, College of Veterinary Medicine, Southwest University, Beibei, Chongqing, 400715, PR China. Electronic address: wang1973@swu.edu.cn.
PMID: 38642435 DOI: 10.1016/j.theriogenology.2024.04.005
Abstract

Heat stress reduces the number of Sertoli cells, which is closely related to an imbalanced redox status. Glutamate functions to maintain the equilibrium of redox homeostasis. However, the role of glutamate in heat treated Sertoli cells remains unclear. Herein, Sertoli cells from 3-week-old piglets were treated at 44 °C for 30 min (heat stress). Glutamate levels increased significantly following heat stress treatment, followed by a gradual decrease during recovery, while glutathione (GSH) showed a gradual increase. The addition of exogenous glutamate (700 μM) to Sertoli cells before heat stress significantly reduced the heat stress-induced Apoptosis rate, mediated by enhanced levels of antioxidant substances (superoxide dismutase (SOD), total antioxidant capacity (TAC), and GSH) and reduced levels of oxidative substances (Reactive Oxygen Species (ROS) and malondialdehyde (MDA)). Glutamate addition to Sertoli cells before heat stress upregulated the levels of glutamate-cysteine Ligase, modifier subunit (Gclm), glutathione synthetase (Gss), thioredoxin (Trx1) and B-cell leukemia/lymphoma 2 (Bcl-2), and the ratio of phosphorylated Akt (protein kinase B)/total Akt. However, it decreased the levels of Bcl2-associated X protein (Bax) and cleaved-caspase 3. Addition of the inhibitor of Glutaminase (Gls1), Bptes (Bis-2-(5-phenylacetamido-1,3,4-thiadiazol-2-yl)ethyl sulfide, 30 μM)to Sertoli cells before heat stress reversed these effects. These results inferred that glutamate rescued heat stress-induced Apoptosis in Sertoli cells by enhancing activity of antioxidant Enzymes and activating the Trx1-Akt pathway. Thus, glutamate supplementation might represent a novel strategy to alleviate the negative effect of heat stress.

Keywords

Boar; Glutamate-cysteine ligase; Glutathione synthetase (Gss); Glutathione(GSH); Modifier subunit (Gclm); Oxidate stress.

Figures
Products
  • Cat. No.
    Product Name
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    Target
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  • HY-12683
    98.98%, Glutaminase Inhibitor