5‐HT also inhibits the neural invasion of prostate cancer cells through semaphorin 3C (SEMA3C)/PlexinA2/neuropilin‐1 (NRP1)/cellular‐mesenchumal epithelial transition factor (cMET) signaling, which reduces the density of tumor‐infiltrating nerve fibers and promotes the growth and migration of mouse xenograft tumors [366]. Here, SEMA3C is linked to neoplasm.