CACNA1C and bipolar disorder: A recent study published by the Psychiatric Genomics Consortium (PGC) has identified that several SNPs (including SNPs in CACNA1C) were significantly associated with five major psychiatric disorders including ASD, attention deficit-hyperactivity disorder, bipolar disorder, major depressive disorder, and schizophrenia in 33,332 cases and 27,888 controls of European ancestry [22].