数据日期 2026-10-29 · 生成时间 2026-10-29 06:03
研究问题
We hypothesized that exercise would differentially affect these markers by intensity and by model group, and that D-galactose-treated rats would show a distinct pattern of response compared with young rats.
方法
Three-month-old male Wistar Albino rats (initial body weight: 220–350 g) were obtained from the Experimental Animals Laboratory of Van Yüzüncü Yıl University.；Only male rats were used to eliminate potential confounding effects of hormonal fluctuations related to the estrous cycle on the measured outcomes.；The rats were maintained in a standard laboratory environment (temperature: 22 ± 2 °C, relative humidity: 55% ± 5%, and a 12/12 h light/dark cycle).；This study was approved by the Van Yüzüncü Yıl University Local Ethics Committee for Animal Experiments (Protocol No: 2022/11-07, date: 3 November 2022) and supported by the Scientific Research Projects Unit of Mersin University (Project No: 2023-2-TP3-4927).
核心结论
In young rats, a statistically significant difference was observed among groups in terms of malondialdehyde (MDA) and sirtuin 2 (SIRT2) levels (p < 0.05), whereas no significant difference was found for peroxisome proliferator-activated receptor gamma coactivator 1-alpha (PGC-1α), brain-derived neurotrophic factor (BDNF), and irisin levels (p > 0.05).；In young rats, analysis revealed a significant difference among groups in MDA levels [F(3,28) = 4.23, p = 0.013, η2 = 0.312]; specifically, MDA levels in the young moderate-intensity exercise group (103.2 ± 10.2 ng/mL) were significantly higher compared to the young control group (90.3 ± 10.4 ng/mL; p = 0.042) and the young high-intensity exercise group (85.9 ± 8.5 ng/mL; p = 0.011).；For SIRT2, the Kruskal–Wallis test showed a significant overall difference among groups [H(3) = 8.224, p = 0.042, ε2 = 0.265]. ‖ 结论：Overall, treadmill exercise produced statistically demonstrated, model-dependent biochemical changes in young rats (SIRT2, MDA, and a significant MDA model × exercise interaction).
局限
This may reflect the D-galactose model not fully replicating the metabolic features of natural chronological aging (Section 2.2), the relatively short 7-week induction period, and/or the possibility that serum PGC-1α does not track tissue-level (muscle or brain) expression of this fundamentally intracellular co-activator protein—a limitation we did not have the means to resolve with tissue-level assays in this study.；[38] reported statistically significant PGC-1α increases in aged animals under different conditions; differences may reflect our shorter 6-week exercise duration (versus 8–12 weeks in some comparator studies) or the serum-versus-tissue limitation noted above.；Given the small…
对本项目的价值
★★★★☆ 脑老化是最大未满足需求，也是终点最难量化的领域；biomarker 与认知读数选择最敏感。命中核心 线粒体；最大样本量约 32；设计 定性研究。
全文来源
PMC JATS 全文（正文 49,047 字符，已过标题/DOI 逐字归属校验）
原文题录
- 英文标题：Effects of Fixed-Speed Treadmill Exercise on Oxidative Stress and Sirtuin Biomarkers in Young and D-Galactose-Treated Rats: A Biochemical Study with Exploratory Hippocampal Observations.
- 期刊与标识：Biomolecules · PMID 42939675 · DOI 10.3390/biom16101421**
B 级证据分级：B 级（同行评议临床前研究，主要为动物模型）
本文核心结论来自动物模型或体外细胞学，属临床前证据，不能外推至人体。「延长健康寿命」「改善功能」等表述在小鼠中的意义，与人类临床结局之间仍有距离。
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