MrgprX2 antagonist-5, which acts as a potent antagonist of MrgprX2. It exhibits the ability to effectively inhibit the activity of MrgprX2, making it an ideal candidate for research related to inflammatory skin disorders.

MRGPRX2, a member of the Mas-related gene family, was found to be expressed in sensory neurons, mast cells and, most recently, in keratinocytes. MRGPRX2 mRNA is present in adipose tissue, esophagus, urinary bladder, lungs with the highest levels found in skin. Activation of MRGPRX2 leads to mast cell degranulation with subsequent pseudo-allergic reactions[2].