|Cancer||Cell death||Cell cycle||Cytoskeleton||Exo/endocytosis||Differentiation||Division||Organelles||Signalling||Stem cells||Trafficking|
Differential expression of LeY and fucosyltransferase IV correlates with the receptivity of RL95-2 and HEC-1A human uterine epithelial cells
Shuai Liu*, Xuesong Yang*, Jiao Wang*, Jianxin Wei*, Dongmei Zhang*, Xiaoqi Wang† and Qiu Yan*1
*Department of Biochemistry and Molecular Biology, Dalian Medical University, Liaoning Provincial Core Lab of Glycobiology and Glycoengineering, Dalian, Peoples Republic of China, and †Department of Dermatology and Pediatrics, Northwestern Universitys Feinberg School of Medicine, Chicago, IL, U.S.A.
Adhesion molecules expressed on the uterine endometrium are potential receptive markers in embryo implantation. RL95-2 and HEC-1A cell lines represent the high- and low-receptive endometrial epithelium respectively. LeY (Lewis Y) is a difucosylated oligosaccharide highly expressed in the endometrium of some species during implantation. α1, 3 fucosylation of LeY is catalysed by FUT4 (fucosyltransferase IV), the key synthesis enzyme for LeY. We investigated whether the difference in receptivity between the 2 cell lines was related to different expressions of LeY and FUT4. RL95-2 cells expressed a higher level of LeY and FUT4 than HEC-1A cells, as shown by immunofluorescent staining, RT–PCR (reverse transcription–PCR) or Western blotting. FUT4-siRNA (small interfering RNA) transfection down-regulated FUT4 and LeY in RL95-2 cells, and inhibited the adhesion of the embryonic cells (JAR) to RL95-2 cell monolayer. FUT4-cDNA, however, increased the expression of FUT4 and LeY in HEC-1A cells, and increased the adhesion of embryonic cells to HEC-1A cell monolayer. Alterations of LeY level by up- or down-regulation of FUT4 also mediated EGFR (epidermal growth factor receptor)/MAPK (mitogen-activated protein kinase) signalling pathway. To conclude, the expression of LeY and FUT4 correlates with endometrial receptivity, making them potential new markers for the evaluation of endometrial receptivity.
Key words: adhesion, embryo, endometrium, fucosyltransferase IV (FUT4), Lewis Y (LeY), receptivity
Abbreviations: EGFR, epidermal growth factor receptor, ERK1/2, extracellular-signal-regulated kinase 1/2, FUT4, fucosyltransferase IV, HRP, horseradish peroxidase, LeY, Lewis Y, MAPK, mitogen-activated protein kinase, RT–PCR, reverse transcription–PCR, siRNA, small interfering RNA
1To whom correspondence should be addressed (email firstname.lastname@example.org).
Received 10 September 2010/10 June 2011; accepted 6 December 2011
Published as Cell Biology International Immediate Publication 6 December 2011, doi:10.1042/CBI20100644
© The Author(s) Journal compilation © 2012 International Federation for Cell Biology