Transplanted Adipose-Derived Stem Cells Ameliorate Testicular Dysfunction In A D-Galactose-Induced Aging Rat Model
Chun Yang1,2, Yi-Kuan Du3, Jun Wang2
1Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen, China.
Journal of Cellular Physiology
|March 3, 2015
Summary
Adipose-derived stem cells (ADSCs) combat aging in rat testes by reducing oxidative stress and glycation. These stem cells promote testicular regeneration and improve function, offering potential for anti-aging therapies.
Area of Science:
- Gerontology
- Stem Cell Biology
- Reproductive Medicine
Background:
- Accumulation of glycation products contributes to aging in slowly renewing tissues like the testis.
- Adipose-derived stem cells (ADSCs) show potential in tissue regeneration and anti-aging therapies, but their mechanisms are unclear.
- Testicular aging is associated with decreased testosterone, impaired steroidogenesis, reduced antioxidant capacity, and increased apoptosis.
Purpose of the Study:
- To investigate the anti-aging effects of ADSCs in a D-galactose-induced rat model of testicular aging.
- To elucidate the underlying mechanisms of ADSC-mediated anti-aging effects in the testis.
Main Methods:
- Male Sprague-Dawley rats were induced to age using daily D-galactose injections for 8 weeks.
- Aging rats received caudal vein injections of 5-bromo-2'-deoxyuridine-labeled ADSCs or phosphate-buffered saline.
- Evaluated serum testosterone, steroidogenic enzyme activity, superoxide dismutase (SOD) activity, lipid peroxidation, spermatogenic cell apoptosis, and methane dicarboxylic aldehyde (MDA) expression.
Main Results:
- D-galactose induced significant decreases in serum testosterone, steroidogenic enzymes, and SOD activity, while increasing lipid peroxidation, apoptosis, and MDA levels.
- ADSC treatment increased SOD levels and decreased MDA levels in aging rats.
- ADSCs restored serum testosterone, steroidogenic enzyme levels, and reduced spermatogenic cell apoptosis, indicating testicular regeneration.
Conclusions:
- ADSCs promote testicular regeneration and functional recovery in a rat model of aging.
- ADSCs exert anti-aging effects through glycation suppression and antioxidant mechanisms.
- While some ADSCs differentiate into Leydig cells, paracrine signaling is the primary mechanism for reducing apoptosis.
