FIG. 1.

Relative mRNA expression of the TH transporters in human term placenta (A) and BeWo cells (B). The mRNA expression level of the TH transporters was normalized to GAPDH. Data are represented as mean ± SEM of three experiments in duplicates or three placentas. Unpaired two-tailed t-test was used for the statistical analysis to compare the mRNA expression level of the known TH transporters in placental tissues collected from the maternal and fetal sides and they are not significant. GAPDH, glyceraldehyde 3-phosphate dehydrogenase; LAT, L-type amino acid transporter; MCT, monocarboxylate transporter; mRNA, messenger RNA; N.D., not detected; OATP, organic anion transporting peptide; SEM, standard error of the mean; TH, thyroid hormone.