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Cell Diversity01:13

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The concept of a cell started with microscopic observations of dead cork tissue by Robert Hooke in 1665. Hooke coined the term "cell" based on the resemblance of the small subdivisions in the cork to the rooms that monks inhabited, called cells. About ten years later, Antonie van Leeuwenhoek became the first person to observe the living and moving cells under a microscope. In the century that followed, the theory that cells represented the basic unit of life developed.
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Diversity in Cell Signaling Responses01:22

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The physiological function of a cell and cellular communication are outcomes of a range of extrinsic signals, intracellular signaling pathways, and cellular responses. No two cell types express the same repertoire of signaling components. Receptors are highly selective for their cognate ligands, but once activated, they can alter multiple cellular processes such as DNA transcription, protein synthesis, and metabolic activity. 
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Diversity of Archaea I01:30

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Archaea, a domain of single-celled microorganisms, are classified into five major phyla based on genetic and biochemical characteristics: Euryarchaeota, Crenarchaeota, Thaumarchaeota, Korarchaeota, and Nanoarchaeota. Among these, the phylum Euryarchaeota is notable for its remarkable diversity in morphology, metabolism, and ecological adaptations.Morphological and Metabolic DiversityMembers of Euryarchaeota exhibit a variety of cellular shapes, including rods and cocci. Their metabolic pathways...
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Archaea, one of the three domains of life, exhibit remarkable diversity and adaptability, thriving in both extreme and moderate environments. Historically, most identified archaea have been classified into two major phyla: Euryarchaeota and Crenarchaeota. However, recent molecular studies have expanded this classification to include three additional phyla: Thaumarchaeota, Nanoarchaeota, and Korarchaeota, each exhibiting unique characteristics and ecological roles.Thaumarchaeota: Mesophiles...
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Excavata is a diverse group of protists that includes both chemoorganotrophic and phototrophic species, with some thriving in anaerobic environments. Among the key groups within Excavata are diplomonads and parabasalids, which are flagellated protists that lack mitochondria and chloroplasts. These microorganisms typically inhabit anoxic environments, such as the intestines of animals, where they exist either symbiotically or as parasites, relying on fermentation for energy production. Some...
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T and B Cell Receptor Immune Repertoire Analysis using Next-generation Sequencing
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Sequencing Diversity One Cell at a Time.

Michael C Oldham1, Anatol C Kreitzer2

  • 1Department of Neurological Surgery, UCSF, San Francisco, CA 94143, USA; Weill Institute for Neurosciences, UCSF, San Francisco, CA 94158, USA.

Cell
|August 11, 2018
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Summary
This summary is machine-generated.

Single-cell RNA sequencing offers new insights into cellular diversity. Three studies used this technology to map distinct cell types in mouse and fly nervous systems.

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Area of Science:

  • Neuroscience
  • Genomics
  • Cell Biology

Background:

  • Understanding cellular diversity is crucial for studying complex biological systems.
  • Traditional methods struggle to capture the full spectrum of cell types.

Purpose of the Study:

  • To apply single-cell RNA sequencing on a large scale.
  • To identify and characterize distinct cell populations within nervous systems.

Main Methods:

  • Utilizing single-cell RNA sequencing (scRNA-seq).
  • Analyzing transcriptional profiles of individual cells.
  • Comparing data from mouse and fly nervous systems.

Main Results:

  • Revealed novel transcriptional patterns distinguishing cell types.
  • Provided a high-resolution map of cellular diversity in the nervous system.
  • Identified specific gene expression signatures for different neuronal and glial cells.

Conclusions:

  • Single-cell RNA sequencing is a powerful tool for dissecting cellular heterogeneity.
  • These findings advance our understanding of nervous system development and function.
  • The study establishes a foundation for future research into cell-specific mechanisms.