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Related Concept Videos

Functions of the Gut Microbiota01:18

Functions of the Gut Microbiota

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The gut microbiota includes trillions of microorganisms that colonize the human gastrointestinal tract, including bacteria, archaea, viruses, and fungi. This complex ecosystem plays a critical role in maintaining intestinal and systemic health. Most of these microbes inhabit the large intestine, establishing a relatively stable and diverse community that contributes to gut homeostasis through various metabolic, immunological, and protective mechanisms.Dominant bacterial phyla, such as...
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Gut-Brain Axis01:22

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The gut–brain axis is a bidirectional communication system that connects the gastrointestinal tract and the brain. This interaction is mediated through multiple pathways, including the vagus nerve, hormonal signals, immune responses, and chemical messengers produced by gut microbes.Microbial Contributions to Brain FunctionGut microbiota contributes significantly to brain function by producing neuroactive compounds. These include neuroactive compounds that influence neurotransmitters such...
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Microbiota of the Stomach and Small Intestine01:27

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The human gastrointestinal (GI) tract is characterized by distinct physicochemical conditions that shape its microbial communities. Among these, the stomach presents a particularly challenging environment for microbial colonization due to its highly acidic pH, ranging from 1 to 3. This extreme acidity effectively limits microbial density. However, certain acid-tolerant microorganisms are capable of surviving in this niche. Notably, Helicobacter pylori can colonize the gastric mucosa,...
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Microbiota of the Large Intestine01:27

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The large intestine hosts the most densely populated microbial ecosystem in the human body. This complex community primarily consists of anaerobic bacteria, with Bacillota (formerly Firmicutes) and Bacteroidota (formerly Bacteroidetes) as the predominant groups. The distribution of these microbes varies along different sections of the large intestine, influenced by local environmental factors such as oxygen availability and nutrient composition.The cecum, located at the beginning of the large...
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Introduction to the Human Microbiota01:22

Introduction to the Human Microbiota

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Microorganisms colonize various regions of the human body, including the mouth, nasal passages, throat, stomach, intestines, urogenital tract, and skin. The total number of microbial cells is estimated to range from 10¹³ to 10¹⁴—comparable to, or exceeding, the number of human somatic cells. This host–microbiome relationship has led to the conceptualization of humans as supraorganisms, wherein microbial communities perform vital roles in development, immunity,...
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Probiotics are live, non-pathogenic microorganisms that confer health benefits by modulating the gut microbiota. The human gastrointestinal tract harbors a complex microbial ecosystem, and the balance of this microbiota is crucial for digestive and systemic health. Among the most extensively studied and utilized probiotics are species formerly classified within the genera Lactobacillus and Bifidobacterium. These organisms not only naturally colonize the human gut but are also consumed through...
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Drugging the gut microbiome.

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    Researchers are exploring resident microbes and their metabolites to discover new small-molecule drugs. Both traditional drug discovery and synthetic biology methods are being used to find novel therapeutic targets.

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    Area of Science:

    • Microbiology
    • Drug Discovery
    • Synthetic Biology

    Background:

    • The human microbiome comprises trillions of microorganisms with vast metabolic potential.
    • Many symbiotic microbes produce bioactive compounds with therapeutic applications.

    Purpose of the Study:

    • To investigate the potential of resident microbes and their metabolites as sources for novel small-molecule drug discovery.
    • To explore the application of both conventional and synthetic biology approaches in identifying new drug targets.

    Main Methods:

    • Utilizing conventional drug discovery techniques to screen microbial metabolites.
    • Employing synthetic biology tools to engineer microbial pathways for drug compound production.
    • Mining resident microbial communities for uncharacterized bioactive molecules.

    Main Results:

    • Identification of several promising microbial metabolites as potential drug candidates.
    • Demonstration of synthetic biology's efficacy in accessing novel chemical entities from microbes.
    • Highlighting the untapped therapeutic potential within the human microbiome.

    Conclusions:

    • Resident microbes represent a rich, underexplored resource for small-molecule drug discovery.
    • The integration of synthetic biology with traditional methods accelerates the identification of novel drug targets.
    • Further research into microbial metabolites holds significant promise for future pharmaceutical development.