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Modern Molecular Taxonomy01:29

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Advancements in molecular biology have revolutionized the identification and characterization of bacteria, with multiple methods leveraging DNA sequencing for enhanced precision. As sequencing technologies improve and costs decline, these approaches are increasingly used in clinical, environmental, and evolutionary studies.Multilocus Sequence Typing (MLST) examines several housekeeping genes, essential chromosomal genes encoding cellular functions, to distinguish strains. Approximately...
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The biological clock is involved in many aspects of regulating complex physiology in all animals. It was in 1935 when German zoologists, Hans Kalmus and Erwin Bünning, discovered the existence of circadian rhythm in Drosophila melanogaster. However, the internal molecular mechanisms behind the circadian clock remained a mystery until 1984, when Jeffrey C. Hall, Michael Rosbash, and Michael W. Young discovered the expression of the Per gene oscillating over a 24-hour cycle. In subsequent...
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The Use of Mouse Splenocytes to Assess Pathogen-associated Molecular Pattern Influence on Clock Gene Expression
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Time in motion: the molecular clock meets the microbiome.

Xue Liang1, Frederic D Bushman2, Garret A FitzGerald1

  • 1Department of Systems Pharmacology and Translational Therapeutics, Perelman School of Medicine, University of Pennsylvania, PA 19104, USA.

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The gut microbiome fluctuates daily, influenced by when we eat. Disrupting the body

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Area of Science:

  • Microbiology
  • Chronobiology
  • Metabolic Health

Background:

  • The intestinal microbiota exhibits daily rhythms.
  • Host feeding schedules regulate these microbial oscillations.
  • Circadian clock disruption is linked to gut dysbiosis.

Purpose of the Study:

  • To investigate the relationship between host feeding time and intestinal microbiota diurnal oscillations.
  • To explore the consequences of circadian clock disruption on gut microbial composition and host metabolism.

Main Methods:

  • Analysis of intestinal microbiota composition.
  • Monitoring of host circadian rhythms.
  • Assessment of host metabolic parameters.

Main Results:

  • Host feeding time dictates the diurnal oscillation patterns of the intestinal microbiota.
  • Disruption of the host circadian clock leads to significant gut dysbiosis.
  • Induced dysbiosis is associated with the development of host metabolic disorders.

Conclusions:

  • Host feeding schedules are critical regulators of intestinal microbiota daily rhythms.
  • Circadian disruption negatively impacts gut microbial ecology and host metabolic health.
  • Targeting feeding times may offer a strategy to manage gut dysbiosis and metabolic disorders.