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Updated: Jun 11, 2026
Germ Cell Transplantation and Testis Tissue Xenografting in Mice
Published on: February 6, 2012
Toxic effects of dexamethasone on mouse testicular germ cells
M Orazizadeh1, L S Khorsandi, M Hashemitabar
1Cell and molecular research center, Faculty of Medicine, University of Medical Sciences, Ahwaz Jundi-Shapour, Iran.
Abstract:
Exposure to glucocorticoids (GCs) leads to numerous changes in various biological systems including the reproductive system. This work evaluated effects of dexamethasone (Dex), a widely used GC, on mouse testicular germ cells. Experimental groups (E1-E3) received one of the following treatments daily for 7 days: 4, 7 and 10 mg kg(-1) Dex respectively. Control groups were treated with equivalent volumes of saline. Testicular histopathology, morphometric analysis and deoxy-UTP-digoxigenin nick end labeling (TUNEL) assessment were performed for evaluation of the toxic effects of Dex and detection of the apoptotic cells. The results showed that Dex induces histopathological alterations such as epithelial vacuolisation, atrophy and reduction in testicular spermatozoid. Morphometrical data showed that Dex significantly reduced tubular diameter and epithelial height (P < 0.05). Johnsen's scoring also showed poor spermatogenesis in E2 and E3 groups (P < 0.05). Apoptotic index of germ cells was significantly increased in E2 (18.9% versus 1.76%, P < 0.01) and E3 (24.6 versus 1.76%, P < 0.001) groups. It is concluded that Dex acts as testicular toxicant and that further studies are needed to establish its mechanism of action upon spermatogenesis.
Insights
Dexamethasone (Dex), a glucocorticoid, causes testicular toxicity in mice. This study found Dex significantly reduces sperm count and increases germ cell apoptosis, indicating its harmful effects on male reproduction.
Area of Science:
- Reproductive Toxicology
- Endocrinology
- Cell Biology
Background:
- Glucocorticoids (GCs) impact various biological systems, including the reproductive system.
- Dexamethasone (Dex) is a commonly used synthetic GC with potential systemic effects.
Purpose of the Study:
- To evaluate the toxic effects of dexamethasone (Dex) on mouse testicular germ cells.
- To assess the impact of Dex on spermatogenesis and germ cell apoptosis.
Main Methods:
- Mice were treated daily for 7 days with varying doses of Dex (4, 7, 10 mg/kg) or saline control.
- Testicular histopathology, morphometric analysis, and TUNEL assay were performed.
- Johnsen's scoring was used to evaluate sperm quality.
Main Results:
- Dex induced histopathological changes, including epithelial vacuolization, atrophy, and reduced spermatozoid count.
- Significant reductions in testicular tubular diameter and epithelial height were observed with Dex treatment (P < 0.05).
- Dex significantly increased germ cell apoptosis, with the apoptotic index rising in a dose-dependent manner (E2: 18.9%, E3: 24.6% vs. control: 1.76%).
Conclusions:
- Dexamethasone acts as a testicular toxicant, impairing spermatogenesis and inducing germ cell death.
- Further research is necessary to elucidate the precise mechanisms underlying Dex-induced testicular toxicity.
