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The oral microbiome includes a complex ecosystem comprising over 700 microbial species, identified through genomic sequencing and culture-based analyses to date. This community includes a core microbiome, found universally among individuals, and a variable component influenced by environmental factors such as diet, lifestyle, and host genetics. Site-specific conditions, including oxygen gradients, pH levels, and nutrient availability, determine the spatial distribution of these microorganisms...
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Functions of the Gut Microbiota01:18

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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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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...
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Microbiota Analysis Using Two-step PCR and Next-generation 16S rRNA Gene Sequencing
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Obesity and the microbiome.

Ruchi Mathur1, Gillian M Barlow

  • 1Division of Endocrine Diabetes and Metabolism, Cedars-Sinai Medical Center, Los Angeles, CA, USA.

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|June 18, 2015
PubMed
Summary
This summary is machine-generated.

Gut microbes, including the Firmicutes to Bacteroidetes ratio and methanogenic Archaea, play a role in obesity development and weight gain. Further research is needed for targeted treatments.

Keywords:
Methanobrevibacter smithiigut microbesmethanogensmicrobiomeobesity

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Area of Science:

  • Microbiome research
  • Obesity science
  • Human gut microbiota

Background:

  • Obesity is a growing public health concern with substantial co-morbidities and costs.
  • Gut microbes are increasingly recognized as contributors to obesity development.
  • The gut microbiome influences nutrient absorption, inflammation, and gut barrier function.

Purpose of the Study:

  • To explore the role of gut microbial populations in obesity.
  • To investigate the mechanisms by which microbes contribute to weight gain.
  • To identify potential targets for obesity treatment based on microbial insights.

Main Methods:

  • Analysis of gut microbial composition in relation to obesity status.
  • Investigation of microbial metabolic functions.
  • Examination of host-microbe interactions affecting metabolism and weight.

Main Results:

  • The ratio of Firmicutes to Bacteroidetes is elevated in obesity and decreases with weight loss.
  • Methanogenic Archaea are implicated in altered host metabolism and weight gain.
  • Specific gut microbial populations demonstrate roles in polysaccharide breakdown and nutrient absorption.

Conclusions:

  • The gut microbiome, including specific bacterial and archaeal populations, significantly influences obesity.
  • Understanding these microbial roles is crucial for developing targeted obesity interventions.
  • Further research is required to elucidate the precise mechanisms for therapeutic development.