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High-intensity interval training reduces Tau and beta-amyloid accumulation by improving lactate-dependent mitophagy in rats with type 2 diabetes
Objective(s):This study aimed to investigate the effect of 8-week high-intensity interval training (HIIT) on lactate-induced mitophagy in the hippocampus of rats with type 2 diabetes. Materials and
Methods: 28 Wistar male rats were divided into four groups randomly: (i) control (Co), (ii) exercise (EX), (iii) type 2 diabetes (T2D), and (iv) type 2 diabetes + exercise (T2D + Ex). The rats in the T2D and T2D + Ex groups were fed a high-fat diet for two months, then a single dose of STZ (35 mg/kg) was injected to induce diabetes. The EX and T2D + Ex groups performed 4–10 intervals of treadmill running at 80–100% of Vmax. Serum and hippocampal levels of lactate, as well as hippocampal levels of monocarboxylate transporter2 (MCT2), sirtuin1 (SIRT1), forkhead box protein O (FOXO3), light chain 3 (LC3), PTEN-induced kinase 1 (PINK1), parkin, beta-amyloid (Aβ), hyperphosphorylated tau protein (TAU), Malondialdehyde (MDA), and antioxidant enzymes were meas ured. One-way ANOVA and Tukey post-hoc tests were used to analyze the data.
Results: Serum and hippocampal levels of lactate as well as hippocampal levels of MCT2, SIRT1, FOXO3, LC3, PINK1, Parkin, and antioxidant enzymes were higher while hippocampal levels of Aβ, TAU, and MDA were lower in T2D+EX compared to T2D group (P-value<0.05)
Conclusion: HIIT could improve mitophagy through Lactate-SIRT1-FOXO3-PINK1/Parkin signaling in the hippocampus of rats with T2D reducing the accumulation of Tau and Aβ, which may reduce the risk of memory impairments. © 2024 mums.ac.ir All rights reserved.
Authors : Khosravi P.; Shahidi F.; Eskandari A.; Khoramipour K.
Source : Mashhad University of Medical Sciences
Article Information
| Year | 2024 |
| Type | Article |
| DOI | 10.22038/IJBMS.2024.77038.16664 |
| ISSN | 20083866 |
| Volume | 27 |
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