Global Transcriptome analyses in METTL3_high and METTL3_Low Human Trophoblast Stem Cells from idiopathic recurrent pregnancy losses (RPLs)

We established RPL-Patient specific TSC lines from placental tissues collected after patients undergoing procedures at the REI clinic at the University of Kansas Medical Center. Two groups of RPL-TSC lines were established. A control RPL-TSC group, which were established from placental tissues without any apparent defect in placental ultra-structure and trophoblast layers and also maintained high expressions of Methyl Transferase-Like3 (METTL3) in villous cytotrophoblast cells (CTBs). The second group is the experimental RPL-TSC group, which were established from RPL-Placentae with defects in placental villi structure and trophoblast layers and showed strong repression of PRMT1 expression in villous CTBs. The established RPL-TSCs were tested for PRMT1 expression. TSCs showed similar expression patterns of METTL3 with respect to CTBs, from which they were established. Thus, RPL-TSC lines with high expression of METTL3 are called METTL3_high RPL-TSCs and The experimental RPL TSCs are called METTL3_low RPL-TSCs. Six METTL3_high RPL TSC lines and three METTL3_low RPL-TSC lines were used for global RNA-sequencing to identify global gene expression patterns.