Gut Microbes: A Plausible Association Between Inflammaging and Metabolic Disorders

Aging is associated with deterioration of cellular homeostasis and increased risk for several age-related metabolic disorders like obesity, diabetes mellitus, and cardiovascular diseases. Chronic and low-grade inflammation is linked with metabolic syndromes especially during aging (inflammaging). This inflammaging may enhance the risk for late-onset diseases. Gut microbes show a significant role in the regulation and pathogenesis of various metabolic disorders. Gut mucosal lining is a mechanical obstruction between gut microbiota and the host. Deterioration of the gut mucosal barrier may expedite biological aging by enabling exposure of gut microbes to the mucosal immunity. Further, the compromised mucosal immunity may lead to inflammation and if immunogenic microbial peptide(s) present in the gut mimics host protein(s), they can induce mild autoimmunity. Therefore, the pathology of metabolic disorders may be related to molecular mimicry stimulated by exposure of gut microbial peptide(s) during aging. This article reviews gut microbes induced inflammaging which can be a potential probiotic target for the treatment of non-communicable diseases.