Broad gut microbiota

The gut microbiota is a vast and diverse community of microorganisms, including bacteria, archaea, fungi, and viruses, that inhabit the human gastrointestinal tract and function as a virtual metabolic organ [1]. It is essential for maintaining host health by facilitating the digestion of complex polysaccharides, synthesizing vitamins such as K and B12, and producing short-chain fatty acids (SCFAs) that regulate systemic inflammation and energy homeostasis [2][3]. A balanced microbiota is crucial for the maturation of the host immune system and provides a protective barrier against the colonization of enteric pathogens through competitive exclusion [4]. Disruptions to this ecosystem, known as dysbiosis, are linked to various conditions, including Clostridioides difficile infection, inflammatory bowel disease (IBD), obesity, and even neurodevelopmental disorders via the gut-brain axis [5][6]. Therapeutic interventions targeting the broad gut microbiota include the use of probiotics, prebiotics, and fecal microbiota transplantation (FMT) to restore ecological stability [7]. Recently, the development of live biotherapeutic products (LBPs) has provided a standardized approach to modulating the microbiota for clinical benefit, particularly in preventing recurrent infections [8]. [1] NIH Human Microbiome Project. [2] Lynch & Pedersen (2016) NEJM. [3] Fan & Pedersen (2021) Nat Rev Microbiol. [4] Belkaid & Hand (2014) Cell. [5] Carding et al. (2015) Microb Ecol Health Dis. [6] Cryan et al. (2019) Physiol Rev. [7] Khoruts & Sadowsky (2016) Gastroenterology. [8] FDA (2022) Rebyota Approval.

Other names

Gut microbiomeIntestinal floraGastrointestinal microbiotaGut microfloraHuman intestinal tract microbiome

Restoration of microbial diversity and ecological balance through the introduction of commensal organisms or selective suppression of pathogens, leading to improved metabolic output and immune regulation [7][8].