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Bacterial signaling can occur within bacteria (intracellular) or between bacteria (intercellular). At times, a group of bacteria behaves like a community. To achieve this, they engage in quorum sensing, the perception of higher cell density that causes changes in gene expression. Quorum sensing involves both extracellular and intracellular signaling. The signaling cascade starts with a molecule called an autoinducer (AI). Individual bacteria produce AIs that move out of the bacterial cell...
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Global regulatory systems in bacteria enable rapid and coordinated responses to environmental changes by integrating sensory inputs with gene expression, ensuring efficient adaptation to fluctuating conditions. Key global regulatory mechanisms include regulons, two-component systems, sigma factors, and secondary messengers.Regulons and Global RegulatorsA regulon is a collection of genes and operons controlled by a common global regulator. These regulators enable bacteria to prioritize resource...
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Despite the protective membrane that separates a cell from the environment, cells need the ability to detect and respond to environmental changes. Additionally, cells often need to communicate with one another. Unicellular and multicellular organisms use a variety of cell signaling mechanisms to communicate with the environment.
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Signaling in Host-Associated Microbial Communities.

Michael A Fischbach1, Julia A Segre2

  • 1Department of Bioengineering and Therapeutic Sciences and California Institute for Quantitative Biosciences, University of California, San Francisco, San Francisco, CA 94143, USA.

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Summary
This summary is machine-generated.

Human microbiota communities are shaped by microbe-microbe and microbe-host interactions. Understanding these signals is key to developing therapies for microbial community dysfunction and promoting health.

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Area of Science:

  • Microbiology
  • Human Microbiome Research
  • Systems Biology

Background:

  • Human-associated microbiota are complex communities.
  • Interspecies interactions are fundamental to microbial community structure and stability.
  • These interactions evolve throughout a human's lifespan, influencing health and disease states.

Purpose of the Study:

  • To review how microbe-microbe and microbe-host interactions are communicated.
  • To understand how these communications shape human-associated microbial communities.
  • To highlight the importance of signaling in host-associated microbial communities for health and disease.

Main Methods:

  • Literature review of studies on microbial interactions and signaling.
  • Analysis of communication mechanisms within host-associated microbial communities.
  • Discussion of modeling approaches for dissecting microbial signaling.

Main Results:

  • Microbe-microbe and microbe-host interactions are mediated by complex communication systems.
  • These signaling pathways are critical for the formation, stabilization, and dynamics of human microbiota.
  • Dysfunctional signaling can lead to microbial community imbalance, impacting host health.

Conclusions:

  • Dissecting signaling in host-associated communities is crucial for understanding their function.
  • Targeting microbial signaling pathways offers potential for novel therapeutic strategies.
  • Interventions can be developed to prevent or correct microbial dysfunction for improved health outcomes.