Decoding the contextual duality of CD40 functions

Hum Immunol. 2023 Aug 16:S0198-8859(23)00310-5. doi: 10.1016/j.humimm.2023.08.142. Online ahead of print.ABSTRACTPreviously, we established that as a function of its mode of interaction with its ligand or cellular conditions such as membrane lipids, preexisting signaling intermediates activation status, a transmembrane receptor, as represented here with CD40, can induce counteractive cellular responses. Using CD40-binding peptides, recombinant mutated CD40-ligands, and an agonistic antibody, we have established the functional duality of CD40. CD40 builds up two constitutionally different signalosomes on lipid raft and non-raft membrane domains initiating two different signaling pathways. Although this initial signaling may be modified by the pre-existing signaling conditions downstream and may be subjected to feed-forward or negative signaling effects, the initial CD40-CD40L interaction plays a crucial role in the functional outcome of CD40. Herein, we have reviewed the influence of interaction between the CD40-CD40L evoking the functional duality of CD40 contingent upon different physiological states of the cells.PMID:37596136 | DOI:10.1016/j.humimm.2023.08.142
Source: Human Immunology - Category: Allergy & Immunology Authors: Source Type: research