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Related Concept Videos

Obesity01:24

Obesity

1.5K
The Body Mass Index (BMI) is a numerical value derived from a person's weight and height, used to categorize individuals into weight ranges. It is calculated using the formula: weight in kilograms divided by height in meters squared. Obesity is a health condition characterized by excessive accumulation of adipose tissue that poses health risks, often diagnosed with a BMI ≥ 30. This excess fat storage occurs when surplus dietary calories are converted into triglycerides and stored in...
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Gut-Brain Axis01:22

Gut-Brain Axis

190
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...
190
Functions of the Gut Microbiota01:18

Functions of the Gut Microbiota

119
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...
119
Pharmacokinetics in Obese Patients: Drug Absorption and Distribution01:25

Pharmacokinetics in Obese Patients: Drug Absorption and Distribution

430
Obesity significantly alters the pharmacokinetic processes of drug absorption and distribution, presenting unique challenges in medical treatment. The increased fat tissue and decreased lean muscle in obese individuals can significantly affect how drugs are absorbed into the body and distributed across different tissues. This alteration can lead to variances in the effectiveness and safety of medications, necessitating adjustments in dosing or drug selection for obese patients.One notable...
430
Pharmacokinetics in Obese Patients: Drug Metabolism and Excretion01:20

Pharmacokinetics in Obese Patients: Drug Metabolism and Excretion

317
Drug metabolism, a critical process in the liver, involves two primary phases: Phase I reactions and Phase II conjugation. Obesity introduces significant alterations in this metabolic process, primarily due to fatty infiltration of the liver, leading to conditions such as nonalcoholic fatty liver disease (NAFLD). This condition can modify the activities of both Phase I and II enzymes, impacting how drugs are metabolized in obese patients.Phase I metabolism sees variable effects across...
317
Irritable Bowel Syndrome I: Introduction01:17

Irritable Bowel Syndrome I: Introduction

1.4K
Irritable Bowel Syndrome (IBS) is characterized by functional disturbances in the gastrointestinal system, presenting a cluster of symptoms without evident structural or biochemical abnormalities. It primarily affects the large intestine and may cause abdominal pain, bloating, excessive gas, diarrhea, constipation, or both.
IBS is a chronic condition that can persist over a long period or recur frequently.
The pathogenesis of IBS involves a complex interplay of the following factors:
Altered...
1.4K

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Related Experiment Video

Updated: Apr 21, 2026

Microbiota Analysis Using Two-step PCR and Next-generation 16S rRNA Gene Sequencing
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Microbiota Analysis Using Two-step PCR and Next-generation 16S rRNA Gene Sequencing

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Obesity and the gut microbiome: pathophysiological aspects.

H Leon Bradlow

    Hormone Molecular Biology and Clinical Investigation
    |November 6, 2014
    PubMed
    Summary

    Obesity is linked to gut microbiome alterations, with specific bacteria imbalances promoting inflammation and energy harvest. Manipulating the gut microbiome may offer a novel strategy for weight management and obesity prevention.

    Area of Science:

    • Microbiome research
    • Obesity and cancer link
    • Gut health and metabolism

    Background:

    • Obesity is a known risk factor for various cancers, but causal links remain unclear.
    • Chronic low-grade inflammation is associated with obesity, with its origins not fully understood.
    • The gut microbiome's role in metabolism has only recently been recognized.

    Purpose of the Study:

    • To explore the correlation between obesity and alterations in the gut microbiome.
    • To investigate the mechanisms by which gut bacteria influence obesity and inflammation.
    • To assess the potential of microbiome manipulation for weight management.

    Main Methods:

    • Analysis of gut microbiome composition in obese and lean individuals.
    • Identification of bacterial metabolites, such as deoxycholic acid and lipopolysaccharides (LPS).

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  • Studies involving fecal microbiota transplantation in germ-free mice to establish causality.

    • Main Results:

    • Obesity is associated with a shift in gut bacteria, favoring Firmacutes over Bacteroidetes.
    • Reduced Akkermansia muciniphila in obese individuals leads to a weakened intestinal barrier and increased endotoxin translocation.
    • Transplantation of obese gut microbiota into germ-free mice induced obesity, while lean microbiota induced weight loss.

    Conclusions:

    • Gut microbiome alterations contribute to obesity by promoting inflammation and increasing energy extraction from food.
    • The gut microbiome plays a significant metabolic role, influencing host weight and inflammation.
    • Targeting the gut microbiome presents a promising avenue for developing interventions for obesity and potentially related diseases.