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Nature Immunology 9, 1213 (1 November 2008) | doi:10.1038/ni1108-1213

Research Highlights

Terminating LPS 'tolerance' After encountering microbial products such as the Toll-like receptor 4 (TLR4) ligand lipopolysaccharide (LPS), macrophages undergo temporary 'reprogramming' that results in less release of proinflammatory mediators after subsequent microbial stimulation. In Cell Host & Microbe, Lu et al. show that the lipase acyloxyacyl hydrolase (AOAH), which removes secondary acyl chains required for the LPS stimulatory ability, ends this period of LPS 'tolerance'.