Abstract
Changing patterns of glycan distribution are described in porcine placentae at 15, 19, 26, 43, 58, 69 and 109 days gestation, using a carefully selected panel of lectins that allowed partial analysis of saccharide classes and sequences. The lectins used were from Galanthus nivalis, Pisum sativum, Phaseolus vulgaris (leukohaemagglutinin), Triticum vulgaris, Tetragonolobus purpureus, Ulex europaeus-1, Arachis hypogaea, Erythrina cristagalli, Glycine max, Maclura pomifera, Wisteria floribunda, Dolichos biflorus, Maackia amurensis, Sambucus nigra and Limax flavus. During the course of gestation the trophoblast developed from a smooth to a deeply folded membrane, while enlarging fetal and maternal capillaries grew closer to each other. The fetomaternal interface expressed many classes of saccharide, both O-and N-linked, but failed to bind DBA, MAA and SNA. Many granules were present in the maternal epithelium, and a striking feature was the appearance of staining with DBA and UEA-1 by day 43. This stage of pregnancy was also associated with changes in trophoblast glycan expression, with a diminution in staining intensity of AHA, MPA and LTA, but an increased intensity with ECA, SBA and WFA. Changes in lectin binding throughout gestation are correlated with previous ultrastructural findings and their relevance to the immunological and functional aspects of pregnancy is discussed.
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Jones, C.J.P., Dantzer, V. & Stoddart, R.W. Changes in glycan distribution within the porcine interhaemal barrier during gestation. Cell Tissue Res 279, 551–564 (1995). https://doi.org/10.1007/BF00318167
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DOI: https://doi.org/10.1007/BF00318167