An Oxidative Central Metabolism Enables Salmonella to Utilize Microbiota-Derived Succinate

作者：Spiga Luisella; Winter Maria G; de Carvalho Tatiane Furtado; Zhu Wenhan; Hughes Elizabeth R; Gillis Caroline C; Behrendt Cassie L; Kim Jiwoong; Chessa Daniela; Andrews Polymenis Helene L; Beiting Daniel P; Santos Renato L; Hooper Lora V; Winter Sebastian E^*

来源：Cell Host & Microbe, 2017, 22(3): 291-+.

DOI：10.1016/j.chom.2017.07.018

The mucosal inflammatory response induced by Salmonella serovar Typhimurium creates a favorable niche for this gut pathogen. Conventional wisdom holds that S. Typhimurium undergoes an incomplete tricarboxylic acid (TCA) cycle in the anaerobic mammalian gut. One change during S. Typhimurium-induced inflammation is the production of oxidized compounds by infiltrating neutrophils. We show that inflammation-derived electron acceptors induce a complete, oxidative TCA cycle in S. Typhimurium, allowing the bacteria to compete with the microbiota for colonization. A complete TCA cycle facilitates utilization of the microbiota-derived fermentation product succinate as a carbon source. S. Typhimurium succinate utilization genes contribute to efficient colonization in conventionally raised mice, but provide no growth advantage in germ-free mice. Mono-association of gnotobiotic mice with Bacteroides, a major succinate producer, restores succinate utilization in S. Typhimurium. Thus, oxidative central metabolism enables S. Typhimurium to utilize a variety of carbon sources, including microbiota-derived succinate.

• 出版日期2017-9-13