Objective To observe the effect of lanthanum chloride(LaCl_3) exoposure on tight junction proteins expression and genes transcription in hippocampus of offspring rats.Methods Forty pregnant Wistar rats were randomly divided into a control group and three LaCl_3 treated groups with 0.25%,0.5%,1.0%(w/v) of LaCl_3 in drinking water.The offspring rats were exposed to LaCl_3 through maternal milk during lactation,and through drinking water for one month after delectation.Claudin-5(Cldn5),occludin(Ocln),and zonul...