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Published on: August 22, 2014
Moderate Exercise Mitigates Diabetes-Induced Hippocampal Dysfunction in Aged Rats
Saltuk Bugra Baltaci1, Gözde Acar2, Elif Gulbahce-Mutlu3
1Research Institute for Health Sciences and Technologies (SABITA), Department of Physiology, Medical Faculty, Istanbul Medipol University, 34810 Istanbul, Türkiye.
International Journal of Molecular Sciences
|July 28, 2026
Summary
Moderate chronic exercise improved hippocampal integrity and motor learning in diabetic aged rats. Exercise reversed diabetes-induced increases in Nogo-A and oxidative stress, while boosting neuroplasticity markers like KLOTHO and NZF-2b.
Area of Science:
- Neuroscience
- Endocrinology
- Exercise Physiology
Background:
- Diabetes and aging are associated with impaired hippocampal function and neuroplasticity.
- Oxidative stress and altered gene expression in the hippocampus contribute to cognitive deficits in diabetic conditions.
- Nogo-A, KLOTHO, and NZF-2b are key markers involved in neuroplasticity and neuronal health.
Purpose of the Study:
- To investigate the effects of moderate chronic exercise on hippocampal integrity, motor learning, and neuroplasticity markers in diabetic aged female Wistar rats.
- To determine if exercise can mitigate diabetes-induced neurodegeneration and oxidative stress in the hippocampus.
- To explore the potential role of specific gene expressions (Nogo-A, KLOTHO, NZF-2b) in exercise-mediated neuroprotection.
Main Methods:
- Induction of diabetes using streptozotocin in aged female Wistar rats.
- Implementation of a 4-week moderate chronic exercise program (daily treadmill sessions).
- Assessment of motor coordination using the rotarod test and analysis of hippocampal gene expression (Nogo-A, KLOTHO, NZF-2b) and oxidative stress markers (MDA, GSH) via RT-PCR and ELISA.
Main Results:
- Diabetic rats exhibited increased Nogo-A and MDA levels, decreased KLOTHO, NZF-2b, and GSH levels, and impaired rotarod performance.
- Chronic exercise significantly reversed these pathological changes, decreasing Nogo-A and MDA, and increasing KLOTHO, NZF-2b, and GSH.
- Exercise intervention led to a significant improvement in motor coordination in diabetic rats.
Conclusions:
- Diabetes and aging negatively impact hippocampal neuroplasticity and increase oxidative stress, leading to motor deficits.
- Moderate chronic exercise demonstrates significant neuroprotective effects against diabetes-induced hippocampal damage.
- Exercise-induced upregulation of NZF-2b suggests a potential mechanism for supporting neuroplasticity and preventing hippocampal degeneration in diabetic conditions.
