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Determination of Mammalian Cell Counts, Cell Size and Cell Health Using the Moxi Z Mini Automated Cell Counter
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Published on: June 21, 2012

Cell density sensing and size determination.

Richard H Gomer1, Wonhee Jang, Derrick Brazill

  • 1Department of Biology, ILSB MS 3474, Texas A&M University, College Station, Texas 77843-3474, USA. rgomer@tamu.edu

Development, Growth & Differentiation
|April 28, 2011
PubMed
Summary
This summary is machine-generated.

Dictyostelium discoideum uses three systems to count cells. These mechanisms, involving secreted signals and feedback loops, help regulate cell density and tissue development in higher eukaryotes.

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Area of Science:

  • Cell Biology
  • Developmental Biology
  • Biochemistry

Background:

  • Dictyostelium discoideum is a model organism for studying cell-cell communication and density sensing.
  • Understanding how cells count themselves is crucial for tissue development and regulation in multicellular organisms.

Purpose of the Study:

  • To review and describe three distinct cell-density sensing systems in Dictyostelium discoideum.
  • To elucidate the molecular mechanisms underlying cell counting in this model system.
  • To provide insights into how higher eukaryotes regulate tissue size and composition.

Main Methods:

  • Description of three cell-density sensing systems: negative feedback loop, starvation-induced signaling, and aggregation stream signaling.
  • Review of experimental findings and computer simulations.
  • Analysis of secreted factors and their effects on cell behavior.

Main Results:

  • A negative feedback loop with two mutually authenticating signals inhibits proliferation as cell density increases.
  • A starvation-specific signal allows sensing of specific cell types within a population.
  • A signal in aggregation streams modulates cell motility and adhesion to regulate stream and fruiting body size.

Conclusions:

  • Dictyostelium employs sophisticated systems for cell density sensing, offering models for higher eukaryotes.
  • These systems involve complex interactions of secreted signals and feedback mechanisms.
  • Studying Dictyostelium provides fundamental insights into the regulation of tissue size and cellular composition.