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Objective: This study investigated the effect of crocin in methylglyoxal (MGO)-induced diabetic male mice.Methods: Seventy 1-month-old male NMRI mice weighing 20–25 g were divided into seven groups (n=10): sham, MGO (600 mg/kg/day), MGO+crocin (15, 30, and 60 mg/kg/day), MGO+metformin (150 mg/kg/day), and crocin (60 mg/kg/day). MGO was administered orally for 30 days. Starting on day 14, after confirming hyperglycemia, metformin and crocin were administered orally. On day 31, plasma and tissue samples were prepared for experimental assessments. Results: Blood glucose and insulin levels in the MGO group were higher than those in the sham group (p&lt;0.001), and decreased in response to metformin (p&lt;0.001) and crocin treatment (not at all doses). Testis width and volume decreased in the MGO mice and improved in the crocin-treated mice (p&lt;0.05), but not in the metformin group. Superoxide dismutase levels decreased in diabetic mice (p&lt;0.05) and malondialdehyde levels increased (p&lt;0.001). Crocin and metformin improved malondialdehyde and superoxide dismutase. Testosterone (p&lt;0.001) and sperm count (p&lt;0.05) decreased in the diabetic mice, and treatment with metformin and crocin recovered these variables. Luteinizing hormone levels increased in diabetic mice (p&lt;0.001) and crocin treatment (but not metformin) attenuated this increase. Seminiferous diameter and height decreased in the diabetic mice and increased in the treatment groups. Vacuoles and ruptures were seen in diabetic testicular tissue, and crocin improved testicular morphology (p&lt;0.01). Conclusion: MGO increased oxidative stress, reduced sex hormones, and induced histological problems in male reproductive organs. Crocin and metformin improved the reproductive damage caused by MGO-induced diabetes.

Effects of crocin and metformin on methylglyoxal-induced reproductive system dysfunction in diabetic male mice