Özet:

Purpose: The purpose of the current study was to evaluate the role of - tocopherol in inhibiting ovarian oxidative stress, changes in ovarian follicles, estradiol levels, and the thickness of the endometrium in rats exposed to tobacco smoke. Material and Methods: Forty female rats were divided into five groups consisting of a control group; group exposed to tobacco smoke; groups exposed to tobacco smokes receiving  - tocopherol supplementation at doses of 100; 200, and 400 mg/kg. Exposure to tobacco smoke was induced using smoke pumping equipment which was designed and made available in the Pharmacology Laboratory, Faculty of Medicine, Brawijaya University. Analysis of MDA level was done colorimetrically. Analysis of the number of ovarian follicles and endometrial thickness was done histopathologically with hematoxylin eosin staining. Analysis of estradiol level was done by ELISA technique. Results: Exposure to tobacco smoke in rats can increase ovarian MDA level (0.388 ± 0.085) significantly compared to the control (0.121 ± 0.026) (P> 0.05). -tocopherol in various doses can reduce MDA level significantly compared to the group exposed to tobacco smoke (P 0.05). The number of primary follicles in the -tocopherol group of the first dose (3.8 ± 1.095) was comparable to the control group (3.8 ± 1.095) (P> 0.05). The numbers of secondary follicles in the -tocopherol group of the first dose (5.2 ± 1.304) and of the second dose (5.4 ± 0.548) were significantly higher than the control group (3.6 ± 0.548) (P < 0.05). Tobacco smoke lowered estradiol level (10.815 ± 2.374) significantly compared with no exposure (21.354 ± 4.215) (P < 0.05). Administration of -tocopherol in different doses increased estradiol level, reaching the level in the control group (P > 0.05). Tobacco smoke lowered thickness of endometrium (209.491 ± 38.635) significantly compared with no exposure (600.265 ± 76.563) (P < 0.05). The -tocopherol of the first dose (604. 569 ± 33.621) and of the second dose (609.459 ± 37.105) increase estradiol levels, reaching the level in the control group (600.265 ± 76.563) (P > 0.05). Conclusion: Regarding the results describe above, it was concluded that -tocopherol could prevent oxidative damage and loss of ovarian function due to exposure to tobacco smoke characterized by decreased levels of MDA, increases in primary and secondary follicles, as well as the hormone estradiol. Furthermore, it also increased the thickness of endometrium.

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