Fig. 5

IL-15 promoted trophoblasts invasion and tube formation. a, b Representative images of invasion and mean number of invasion cells of HTR8/SVneo, JEG-3 and JAR in different groups as detected by a transwell invasion assay. Bar = 50um. c, d Representative images of tube formation and mean number of total tube length of HTR8/SVneo in different groups as measured by the tube formation assay. Bar = 100um. *P < 0.05, **P < 0.01, ***P < 0.001