IL23R (Interleukin 23 Receptor): IL23R is a gene that encodes the receptor for interleukin-23 (IL-23), a cytokine involved in immune regulation. The IL23R receptor is primarily found on immune cells, where its activation is crucial for the differentiation and function of T helper 17 (Th17) cells, which play a role in inflammatory responses and the development of autoimmune diseases.