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  • Title: Increase in lysosomal numbers and activity in the rat uterine luminal and glandular epithelium during early pregnancy: a histochemical study.
    Author: Kirk AT, Murphy CR.
    Journal: Acta Anat (Basel); 1991; 141(1):63-9. PubMed ID: 1950421.
    Abstract:
    Lysosomal acid phosphatase was studied at both the light and electron microscope level in the rat uterine luminal and glandular epithelium, at oestrous, late dioestrous and day 6 of pregnancy. At the light-microscopic level lysosomal numbers were quantified and statistically analysed. A morphological study was also carried out on the lysosomes at the electron-microscopic level in the above-mentioned stages. Quantification of lysosomal numbers found day 6 of pregnancy to have a significantly higher lysosomal population in the luminal and glandular epithelium compared to non-pregnant states. At the electron-microscopic level the luminal epithelial lysosomes were frequently observed in an invaginated or vesiculated form whereas these characteristics were rarely observed during late dioestrous and were non-existent during oestrous. Generally, the lysosomes appeared more active in the luminal epithelium at day 6 of pregnancy compared to the non-pregnant state. The findings are discussed in reference to the role of the lysosome at the time of blastocyst implantation.
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