Phospholipid Containing Choline Histochemistry of Mouse Uterine Epithelia during Preimplantation Stage |
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Authors: | Cintia Sade Paiva Maria do Carmo Alberto Rincon Sonia Minervino Paiva Ivanira Jos Bechara Aureo Tatsumi Yamada |
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Institution: |
a Laboratory of Cytochemistry and Immunocytochemistry, Department of Histology and Embryology, Institute of Biology, State University of Campinas, Brazil |
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Abstract: | The physiological role of high lipid content in endometrial cells during pregnancy has not been well established. In the present work we used histochemical techniques to analyze the total lipids and phospholipid containing choline (PCC) in the mouse uterine glandular and luminal epithelia during preimplantation stage. Sudan black histochemistry showed the highest intensity during the second day of pregnancy in both the basal and apical portions of luminal epithelium. Peaks of PCC staining were seen both in the luminal and glandular epithelia at the second and fifth days of pregnancy. Changes in localization and in the amount of lipid in the uterine epithelia suggest high mobility and metabolic rates of this substance, which maybe related to morphological and/or functional changes occurring at the same time in the pregnant uterus. The increase and depletion timing of PCC content in the uterine epithelia during preimplantation stage, when uterine prostaglandin is also oscillating, suggest a possible involvement of PCC in prostaglandin biosynthesis. Therefore, the fate of lipid droplets found in the uterine epithelia may be related to critical changes of the pregnant endometrium, rather than the nourishment of developing embryos alone. |
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Keywords: | endometrium lipid histochemistry phospholipid preimplantation uterine epithelium |
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