Reduced interleukin-2 receptor subunit γ expression in Crohn's disease: A potential mechanism for γδ T cell deficiency

Crohn’s disease (CD) is a chronic inflammatory disorder characterized by dysregulated immune responses and significant disruption of intestinal immunity. A recent case-control study by Andreu-Ballester et al revealed decreased expression of interleukin (IL)-2 receptor subunit γ (CD132) in CD tissues, a finding that has profound implications for understanding immune dysregulation in CD. CD132, an essential component of the IL-7/IL-2 signaling axis, is critical for γδ T cell survival and function, which are pivotal for maintaining gut integrity and modulating inflammation. Here, we propose that reduced CD132 expression represents a key mechanism underlying γδ T cell deficiencies in CD, contributing to impaired immune surveillance and exacerbated inflammation. This hypothesis integrates emerging evidence from cytokine signaling and immunopathology in CD, offering new insights into its pathogenesis. These findings highlight the therapeutic potential of targeting the IL-7/IL-2 axis to restore immune homeostasis in CD, presenting a novel avenue for future research and intervention.