Why the study?
Activities of TNF family members are associated with their targeting to lipid rafts, prompting investigation into their physical association with the lipid raft resident protein caveolin-1.
This study provides the first evidence of a direct interaction between TNF, CD40L, and caveolin-1, suggesting caveolin-1 mediates their recruitment to lipid rafts.
No immediate clinical implications; leaves open caveolin-1 as modulator of TNF family signaling in inflammation.
Activities of the tumour necrosis factor (TNF) family members are associated with their targeting to lipid rafts, specialised regions of the plasma membrane. Herein, we investigated the physical association of TNF and its family members cluster of differentiation 40 ligand (CD40L) and tumour necrosis factor-related apoptosis-inducing ligand with caveolin-1, a lipid raft resident protein. We discovered that the intracellular domains of TNF and CD40L interact with caveolin-1, and the membrane proximal region of TNF is required for the binding of caveolin-1 domains. Full-length TNF can form a complex with caveolin-1 in membrane rafts of HeLa cells, and caveolin-1 knockdown leads to impaired TNF transport to rafts. These findings provide the first evidence of a direct interaction between TNF, CD40L and caveolin-1 and suggest that caveolin-1 may be responsible for recruiting TNF to lipid rafts.
No takes yet. Share an insight, caveat, or question.
Trizna et al. (2021) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: