جستجوی مقالات مرتبط با کلیدواژه "بافت بیضه" در نشریات گروه "بیوتکنولوژی و ژنتیک گیاهی"

One of the most important costs of sheep breeding is feed and the concentrated part of the ration. This research was conducted in order to investigate the effect of different rates of concentrate and fodder in lambs.

27 Lori Bakhtiari male lambs with an average age of 75 days and a weight of 26kg were selected and divided into three treatments and nine replications. Treatment one was 55:45 concentrate to fodder, second treatment was 70:30 and third treatment was 15:85 and feeding was done individually in morning and evening. After the end of the 100-day period, blood sampling was done and all the lambs were slaughtered. The testicles were removed from the scrotum and after measuring the morphometric parameters, the testicular tissue sample with dimensions of 1x1cm was prepared in 10% formalin solution and tissue sections were prepared.

The results showed that the rate of concentrate and fodder made a significant difference in the macroscopic parameters of testicular tissue (P˂0.05). The weight of the testis in the treatment of three lambs decreased. In this treatment, the thickness of the coating of spermatogenic tubes, tube diameter, lumen diameter and tube area decreased. Also, the rate of hematocrit, red blood cells and hemoglobin of this treatment was significantly higher than other treatments (P˂0.05).

increasing the percentage of concentrate more than 70% will have a negative effect.

Immunosuppressive drugs cause destructive changes and atrophy of seminiferous tubules, decrease in sperm count and motility and sperm deformities in epididymal ducts, resulting in male infertility. Therefore, in this study, the role of vitamin A in preventing these effects was on spermatogenesis in male rats.

 In this study using 40 NMRI mice in 5 groups of 8 for 8 weeks including control group, prednisolone control group 1.5 mg/kg, prednisolone control group 2.5 mg/kg (intramuscular) And 2 groups treated with vitamin A50 mg/kg (gavage). Finally, testicular tissue and sperm parameters were examined and the obtained data were analyzed using ANOVA software.

 Prednisolone treatment had an effect on body weight, testicular weight to body weight ratio, testicular seminiferous tubules diameter and serum testosterone concentration and a significant decrease (P <0.05). It also affected other parameters including sperm motility and testicular tissue cells and caused a so-called significant decrease in surface area (p <0.05) and caused a significant decrease in other parameters such as sperm count, percentage of live sperm.

This study shows that prednisolone increases the process of spermatogenesis by increasing oxidative stress and apoptosis, and vitamin A prevents the damaging effects of prednisolone on spermatogenesis and testicular tissue by reducing oxidative stress and inhibiting apoptosis.