Lower airway dysbiosis exacerbates lung cancer

Accumulating evidence supports the impact of the gut microbiota on the clinical efficacy of cancer immunotherapies against extraintestinal tumors, but it has not yet been addressed whether local commensals could also dictate the prognosis of patients with cancer. In this issue of Cancer Discovery, Tsay and colleagues demonstrate that the lower airway microbiota may harbor oral commensals that turn on IL17-mediated infl ammatory pathways and reprogram host transcription to exacerbate lung cancer progression.