10.6084/m9.figshare.5128636.v1 Nio-Kobayashi J. Nio-Kobayashi J. Abidin H.B.Z. Abidin H.B.Z. Brown J.K. Brown J.K. Iwanaga T. Iwanaga T. Horne A.W. Horne A.W. Duncan W.C. Duncan W.C. Supplementary Material for: The Expression and Cellular Localization of Galectin-1 and Galectin-3 in the Fallopian Tube Are Altered in Women with Tubal Ectopic Pregnancy Karger Publishers 2015 Galectin Human fallopian tube Menstrual cycle Ectopic pregnancy Cilia 2015-09-12 00:00:00 Dataset https://karger.figshare.com/articles/dataset/Supplementary_Material_for_The_Expression_and_Cellular_Localization_of_Galectin-1_and_Galectin-3_in_the_Fallopian_Tube_Are_Altered_in_Women_with_Tubal_Ectopic_Pregnancy/5128636 Galectin-1 and galectin-3 are abundantly expressed at implantation sites in the uterus, suggesting their involvement in the establishment of pregnancy. In this study, we examined the expression and localization of galectin-1 and galectin-3 in fallopian tubes from nonpregnant women, and in those presenting with tubal ectopic pregnancy. There was no significant difference in the expression of either galectin-1 <i>(LGALS1)</i> or galectin-3 <i>(LGALS3)</i> transcripts in the fallopian tube across the menstrual cycle. Their expressions in the fallopian tube were inversely correlated to each other (r = −0.5134, p < 0.0001) and differentially localized. Galectin-1 protein was abundant in the stroma of nonpregnant fallopian tubes, whereas galectin-3 was mainly localized to the epithelium, notably to the cilia of ciliated cells and the apical cytoplasm of secretory cells. In ectopic pregnancies,<i> LGALS3</i> expression was significantly reduced (p < 0.0001), but <i>LGALS1</i> expression did not change when compared to nonpregnant fallopian tubes collected during the mid-secretory phase. The percentage of fallopian tube epithelial cells expressing galectin-3 in cilia tended to be reduced (p = 0.0685), with an accompanying loss of a normal ciliary structure, while nuclear galectin-3 increased (p < 0.05) in ectopic pregnancies. Epithelial immunostaining for galectin-1 tended to be elevated in fallopian tubes from women with ectopic pregnancy. Coculture of human trophoblast origin SW71 cells significantly increased <i>LGALS1</i> expression in human fallopian tube epithelial OE-E6/E7 cells, suggesting that trophoblast-derived products regulate <i>LGALS1</i> expression in the oviductal epithelium. These findings imply a differential contribution of galectin-1 and galectin-3 in the homeostasis of human fallopian tubes and in the pathophysiology of ectopic pregnancy.