Accumulating studies have demonstrated the presence of viable and metabolically active bacterial communities within a range of solid tumor types. However, the precise mechanisms by which these microbes modulate their infected tumor niches or impact patient responses to cancer treatments remain to be elucidated. Recently, Colbert et al. revealed that L-lactate produced by intratumoral Lactobacillus iners reprograms metabolic capabilities of cervical tumors to support chemoradiotherapy resistance. This finding has implications for many solid cancer types.
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