Interleukin-7 receptor alpha – common gamma chain complex (IL-7R) (IL-7R)

The Interleukin-7 receptor alpha – common gamma chain complex (IL-7R) is a heterodimeric type I cytokine receptor primarily expressed on lymphoid cells, including T cells, B cells, and innate lymphoid cells (NIH, 2022). It consists of the IL-7 receptor alpha subunit (IL-7Rα, CD127) and the common gamma chain (γc, CD132), which is shared with other cytokine receptors such as those for IL-2 and IL-15 (Wikipedia, 2024). Binding of the ligand Interleukin-7 (IL-7) to this complex initiates critical signaling pathways, most notably the JAK1/JAK3-STAT5 pathway, which regulates the development, survival, and homeostatic proliferation of lymphocytes (NIH, 2021). Dysregulation of the IL-7R complex is linked to several clinical conditions: genetic deficiencies in either subunit lead to severe combined immunodeficiency (SCID), while overactivation or gain-of-function mutations are associated with autoimmune diseases like multiple sclerosis and hematologic malignancies such as T-cell acute lymphoblastic leukemia (T-ALL) (PNAS, 2012). Therapeutic interventions targeting this complex include monoclonal antibodies like lusvertikimab designed to block signaling in autoimmune and oncological contexts, as well as recombinant IL-7 or agonists aimed at boosting immune recovery in patients with HIV, sepsis, or post-transplant lymphopenia (NIH, 2020).

Other names

CD127/CD132 complexIL-7 receptorIL-7RIL-7Rα/γc complexInterleukin-7 receptor

IL-7 receptor alpha antagonism, IL-7 receptor agonism, JAK/STAT signaling inhibition