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The lipid-sensing CD1 system could help improve vaccines and cancer therapies

Science reports that CD1 proteins display pathogen lipids to T cells but can also trigger skin inflammation in response to some lipids.

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Illustration of an immune reaction to urushiol. The first panel shows an inflammatory rash on hands and forearms. An inset illustration shows a zoomed-in view of a T cell and an antigen-presenting cell making contact, while surrounded by smaller lipid molcules. Another inset zooms in on the contact between the cells, showing how a lipid fits into the CD1 protein on the antigen-presenting cell. A T cell receptor can be triggered by touching CD1 and the lipid it holds, but sometimes the lipid is hidden due to where it sits in the protein, so only CD1 makes contact.

TLDR

Science reports that the CD1 system responds to lipids rather than proteins. CD1 proteins on antigen-presenting cells display pathogen lipids to T cells, driving protective immune responses, but can also trigger skin inflammation in response to some lipids. Science says this little-known part of the immune system could be key to better vaccines and cancer therapies.

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The lipid-sensing CD1 system could help improve vaccines and cancer therapies

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