ABSTRACT
Aim of the work: bisphenol A [BPA] is a synthetic monomer that is polymerized to manufacture polycarbonate plastic products and resins, including those used in food packaging and dental sealants. It is used in the manufacture of a great variety of products including: compact disks, food can linings, plastic windows, car parts, adhesives, protective coatings and powder paints. This work aimed to study the effect of prenatal exposure to BPA on the endometrium of female rats
Materials and methods: thirty adult female albino rats were divided into three groups: rats in group 1 served as a control [G1] and received an equal amount of sesame oil to those of the treated groups; those in group 2 [G2] were administered by gavage 5.0 microg BPA/kg/day [low-dose group]; the third group [G3] received 50 microg BPA/kg/day [high-dose group]. The female offspring of each group were weaned at day 21 and maintained until 3 months old. The uteri were dissected for the histological and immuno-histochemical examination
Results: low-dose group showed degeneration of the epithelial lining of the endometrium with focal patches of increased epithelial cell layers. The high dose group revealed cytoplasmic hydropic degeneration and pyknotic nuclei of the epithelial cells. Estrogen receptors showed a significant decrease of positive cells in low dose treated group and this decrease markedly accentuated in the high dose one. Positive nuclei for Ki-67 were markedly increased with increasing doses of BPA
Conclusion: BPA showed obvious endometrial degenerative and proliferative histological changes. Therefore, the use of this substance in food packaging materials and in the manufacture of substances liable to come into contact with food and drink should be phased out