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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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Gene Regulation in Microbial Communities: Quorum Sensing01:28

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Quorum sensing is a mechanism of bacterial communication that enables coordinated gene expression in response to changes in population density. This facilitates collective behaviors that enhance survival, resource acquisition, and ecological adaptation. This process relies on small signaling molecules called autoinducers that accumulate as bacterial populations grow. When a critical threshold concentration of autoinducers is reached, bacterial cells collectively modify gene expression,...
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Yeasts are single-celled organisms, but unlike bacteria, they are eukaryotes (cells with a nucleus). Cell signaling in yeast is similar to signaling in other eukaryotic cells. A ligand, such as a protein or a small molecule released from a yeast cell, attaches to a receptor on the cell surface. The binding stimulates second-messenger kinases to activate or inactivate transcription factors that further regulate gene expression. Many of the yeast intracellular signaling cascades have similar...
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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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Overview of Cell Signaling01:23

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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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Updated: Mar 24, 2026

Investigation of Microbial Cooperation via Imaging Mass Spectrometry Analysis of Bacterial Colonies Grown on Agar and in Tissue During Infection
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La señalización en las comunidades microbianas asociadas al huésped

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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|March 12, 2016
PubMed
Resumen

Las comunidades de microbiota humana están formadas por las interacciones microbio-microbio y microbio-huésped. Comprender estas señales es clave para desarrollar terapias para la disfunción de la comunidad microbiana y promover la salud.

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Área de la Ciencia:

  • Microbiología
  • Investigación del microbioma humano
  • Biología de sistemas

Sus antecedentes:

  • La microbiota asociada al hombre son comunidades complejas.
  • Las interacciones entre especies son fundamentales para la estructura y la estabilidad de la comunidad microbiana.
  • Estas interacciones evolucionan a lo largo de la vida de un ser humano, influyendo en los estados de salud y enfermedad.

Objetivo del estudio:

  • Revisar cómo se comunican las interacciones microbio-microbio y microbio-huésped.
  • Comprender cómo estas comunicaciones dan forma a las comunidades microbianas asociadas con los humanos.
  • Resaltar la importancia de la señalización en las comunidades microbianas asociadas al huésped para la salud y la enfermedad.

Principales métodos:

  • Revisión de la literatura de estudios sobre las interacciones y la señalización microbiana.
  • Análisis de los mecanismos de comunicación dentro de las comunidades microbianas asociadas al huésped.
  • Discusión de los enfoques de modelado para la disección de la señalización microbiana.

Principales resultados:

  • Las interacciones microbio-microbio y microbio-anfitrión están mediadas por sistemas de comunicación complejos.
  • Estas vías de señalización son críticas para la formación, la estabilización y la dinámica de la microbiota humana.
  • La señalización disfuncional puede conducir a un desequilibrio de la comunidad microbiana, lo que afecta la salud del huésped.

Conclusiones:

  • La disección de la señalización en las comunidades asociadas al huésped es crucial para comprender su función.
  • Dirigirse a las vías de señalización microbiana ofrece potencial para nuevas estrategias terapéuticas.
  • Se pueden desarrollar intervenciones para prevenir o corregir la disfunción microbiana para mejorar los resultados de salud.