PLXNA1 and neoplasm: At the endpoint of 7 weeks, mean tumor diameter of NT-BTSCs (13.1 mm ± 2.4) was greater than that of Nrp1-KD BTSCs (0.0 mm ± 0.0), and approached significance for PlxnA1-KD BTSCs (5.6 mm ± 1.4) (Fig. 5b).