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Interleukin-17A-producing γδ T cells drive cognitive dysfunction in periodontitis.

Cell reports · Kishikawa S, Nagao JI, Toyonaga K, Iwanuma A, Iwai S, Aosaka A, Tanaka Y · 2026-08-27

Porphyromonas gingivalis-induced periodontitis triggered anxiety and cognitive decline in mice by driving IL-17A-producing γδ T cells to migrate to the brain via cervical lymph nodes, a pathway that blocking antibodies could reverse.

A plain-English summary of the study's own findings — we don't add our own claims or interpretation. Read the full paper for the complete methods and results, and apply your own clinical judgement.

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