Mechanisms of disease articles from across Nature Portfolio

How mucosal-associated invariant T (MAIT) cells acquire memory-like features after infection and the factors that control this process have been unclear. A study now defines two subsets of antigen-adapted MAIT cells emerging after immunization that differ in functions, lung localization and metabolic requirements.

Accumulation of senescent cells and compositional changes in gut microbiota have been independently reported to occur as a function of age. A study now suggests that these two seemingly disparate processes are more intimately linked than previously appreciated via a B cell–IgA–microbiota axis.