Study of Serum FSH, LH and Prolactin in Female Albino Rats by Experimentally Creating Hypothyroidism

Abstract

Objective: The current research was draft to contrast the variation in levels of Prolactin (PRL), Luteinizing Hormone (LH) and Follicle stimulating hormone (FSH) in female rodents by experimentally producing hypothyroidism. Methods: The Animal House of Dow University of Health science was used for the purpose of doing this research which was almost completed in a period of 10 months. The total number of 30 rodents of Wistar Albino species were taken to use in this research. Only adult healthy female rodents weighing between 180-200 gm were included in the study and animals which were found to be slow and lethargic were excluded from the study. These rats were separated into two parts by dividing them into two groups of fifteen animals each. The primary group received the regular normal diet and routine tap water for six weeks and was labeled as the control group whereas the other group was forced to accept Carbimazole (Antithyroid drug) through feeding tube by mixing 0.02% / ml of regular drinking water for a period of six weeks. After six weeks all the rats were slaughtered. The cardiac puncture of animal was done in order to collect blood. Analysis of Follicle Stimulating Hormone, Luteinizing Hormone and Prolactin was carried out by using the ELISA kits on serum of animal which was centrifuged and separated. Results: The result observed for control group showed a mean value ± standard deviation(SD) of 5.13 ± 1.39 mIU/ml for Follicle Stimulating Hormone. In the same group the mean value ± SD observed for Luteinizing Hormone was 8.38 ± 16.02 mIU/ml and for PRL was 0.40 ± 0.05 ng/ml respectively. The second group that is the hypothyroid group revealed a mean value ± (SD) of 5.89 ± 1.63 mIU/ml for Follicle Stimulating Hormone. For Luteinizing Hormones in hypothyroid group, the mean value ± SD turned out to be 9.30 ± 13.34 mIU/ml whereas the mean value ± SD observed for Prolactin in hypothyroid group was 0.62 ± 0.12 ng/ml. The information was entered on SPSS version 16. This information was analysed by applying an independent sample t-test in between the two groups to compare the levels of Follicle Stimulating Hormone, Luteinizing Hormone and PRL. The p-value was observed which turned out to be insignificant for Follicle Stimulating Hormone and Luteinizing Hormone but quite remarkable for Prolactin. Conclusion: Hypothyroidism created by an antithyroid drug (Carbimazole) leads to a remarkable rise in the levels of PRL regardless of the changes in levels of gonadotropins which may lead to the sterility in females.

Keywords

• Hypothyroidism
• Antithyroid agents
• Prolactin (PRL)
• Gonadotropins