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From a molecular biological viewpoint, does endothelin type A receptor antagonist therapy reduce diabetes-induced
Buket Kosova1, Vildan Bozok Cetintaş, Altuğ Yavaşoğlu
1Department of Medical Biology, Ege University School of Medicine, Izmir, Turkey.
Objectives:
To evaluate the therapeutic effects of a selective endothelin type A receptor antagonist (ERA-A) on testis of streptozotocin (STZ)-induced diabetic rats.
Methods:
Eighty rats were analyzed in 4 groups: healthy controls, diabetic rats, diabetic rats treated with ERA-A, and healthy rats treated with ERA-A. Diabetes was induced in 40 rats by a single intraperitoneal injection of STZ and followed for 2 months. A total of 20 diabetic and 20 healthy rats were also intravenously treated with ERA-A at days 7 and 15. The remaining untreated healthy rats served as controls. Blood glucose levels of ≥ 250 mg/dL were considered to indicate diabetes and were measured at the end of the second month. Formalin-fixed paraffin-embedded testis tissue sections were analyzed after staining with hematoxylin and eosin or specific antibodies for apoptotic markers. mRNA expressions of genes involved in the apoptotic pathway or spermatogenesis were evaluated by real-time reverse transcription-polymerase chain reaction.
Results:
Major therapeutic effects of ERA-A could be achieved for damages caused by oxidative stress. Although a decrease in apoptotic cell death could be detected, no statistically meaningful results could be obtained for the duration of spermatogenesis.
Conclusions:
ERA-A could prevent germ cell death by apoptosis and testicular damage in diabetic rats.
Insights
A selective endothelin type A receptor antagonist (ERA-A) shows therapeutic effects in diabetic rats, preventing germ cell death and testicular damage. ERA-A helps mitigate oxidative stress-induced damage in the testes of diabetic rats.
Area of Science:
- Reproductive biology
- Endocrinology
- Pharmacology
Background:
- Diabetes mellitus, induced by streptozotocin (STZ), causes significant testicular damage.
- Oxidative stress and apoptosis are key mechanisms contributing to diabetic testicular dysfunction.
Purpose of the Study:
- To investigate the therapeutic potential of a selective endothelin type A receptor antagonist (ERA-A) in mitigating testicular damage in STZ-induced diabetic rats.
- To evaluate the impact of ERA-A on germ cell apoptosis and oxidative stress markers in the diabetic rat testis.
Main Methods:
- STZ-induced diabetes model in rats (n=80) divided into four groups: control, diabetic, diabetic+ERA-A, and control+ERA-A.
- Assessment of blood glucose levels, testicular histology (H&E staining), apoptotic markers, and gene expression related to apoptosis and spermatogenesis via RT-PCR.
Main Results:
- ERA-A demonstrated significant therapeutic effects against oxidative stress-induced testicular damage.
- A reduction in apoptotic cell death was observed in diabetic rats treated with ERA-A.
- No statistically significant improvements were noted in the duration of spermatogenesis.
Conclusions:
- ERA-A effectively prevents germ cell apoptosis and reduces testicular damage in STZ-induced diabetic rats.
- The findings suggest ERA-A as a potential therapeutic agent for diabetic testicular complications.
