IL5RA (Interleukin 5 Receptor Alpha): IL5RA is a component of the receptor for interleukin 5, a cytokine involved in the growth and differentiation of eosinophils. It plays an important role in immune responses, especially in allergic reactions and asthma, where eosinophils act as key effector cells. Targeting IL5RA is a therapeutic approach for diseases with eosinophilia, offering potential treatments for severe asthma and other eosinophil-related conditions.