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Type: Journal article
Title: Discovery and characterization of an epithelial-specific galectin in the endometrium that forms crystals in the trophectoderm
Author: Gray, C.
Adelson, D.
Bazer, F.
Burghardt, R.
Meeusen, E.
Spencer, T.
Citation: Proceedings of the National Academy of Sciences of USA, 2004; 101(21):7982-7987
Publisher: Natl Acad Sciences
Issue Date: 2004
ISSN: 0027-8424
Statement of
C. Allison Gray, David L. Adelson, Fuller W. Bazer, Robert C. Burghardt, Els N. T. Meeusen, and Thomas E. Spencer
Abstract: Secretions of the uterus support survival and growth of the conceptus (embryo/fetus and associated membranes) during pregnancy. Galectin-15, also known as OVGAL11 and a previously uncharacterized member of the galectin family of secreted beta-galactoside lectins containing a conserved carbohydrate recognition domain and a separate putative integrin binding domain, was discovered in the uterus of sheep. In endometria of cyclic and pregnant sheep, galectin-15 mRNA was expressed specifically in the endometrial luminal epithelium but not in the conceptus. In pregnant sheep, galectin-15 mRNA expression appeared in the epithelia between days 10 and 12 and increased between days 12 and 16. Progesterone induced and IFN-tau stimulated galectin-15 mRNA in the endometrial epithelium. Galectin-15 protein was concentrated near and on the apical surface of the endometrial luminal epithelia and localized within discrete cytoplasmic crystalline structures of conceptus trophectoderm (Tr). In the uterine lumen, secreted galectin-15 protein increased between days 14 and 16 of pregnancy. Galectin-15 protein was functional in binding lactose and mannose sugars and immunologically identical to the unnamed Mr 14,000 (14K) protein from the ovine uterus that forms crystalline inclusion bodies in endometrial epithelia and conceptus Tr. Based on the functional studies of other galectins, galectin-15 is hypothesized to function extracellularly to regulate Tr migration and adhesion to the endometrial epithelium and intracellularly to regulate Tr cell survival, growth, and differentiation. Galectins may be useful as cellular and molecular markers for endometrial function and receptivity, to enhance conceptus survival and development, and to evaluate and enhance fertility.
Keywords: Endometrium
RNA, Messenger
Gene Expression Profiling
Cell Division
Cell Differentiation
Cell Survival
Gene Expression Regulation
Amino Acid Sequence
Time Factors
Molecular Sequence Data
Description: Copyright © 2004 by The National Academy of Sciences of the USA
DOI: 10.1073/pnas.0402669101
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Appears in Collections:Aurora harvest
Environment Institute publications
Molecular and Biomedical Science publications

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