Fig. 2From: Impaired neurodevelopmental pathways in autism spectrum disorder: a review of signaling mechanisms and crosstalkPossible interactions between ASD causal genes and SHH signaling. The genes encoded for PTCHD1, EN2, and DHCR7 are potential ASD genes. Note: minus sign indicates downregulation; question mark indicates undefined role of PTCHD1 in SHH signalingBack to article page