HOXA5 and inflammatory bowel disease: These included the interferon-alpha antiviral effector gene IQ motif-containing GTPase-activating protein 2 (IQGAP2), the neuronal pro-survival factor ninjurin 2 (NINJ2) that has previously been linked with Inflammatory Bowel Disease and Peripheral Autonomic Neuropathy, Fibroblast growth factor receptor 2 (FGFR2) that plays a role in bone growth during embryonic development, and Homeobox protein Hox-A5 (HOXA5) that is part of a developmental regulatory system providing cells with positional identities.