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Related Concept Videos

Cytoplasm01:16

Cytoplasm

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The cytoplasm consists of organelles and a framework of protein scaffolds called the cytoskeleton suspended in an aqueous solution, the cytosol. The cytosol is a rich broth of water, ions, salts, and various organic molecules.
Protein Folding and Misfolding
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Cytoplasm01:24

Cytoplasm

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The cytoplasm consists of organelles and a framework of protein scaffolds called the cytoskeleton suspended in an aqueous solution, the cytosol. The cytosol is a rich broth of water, ions, salts, and various organic molecules.
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Distribution of Cytoplasmic Content02:33

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Cytokinesis segregates a cell’s chromosomes and organelles into its daughter cells. Organelles divide and grow prior to cell division but cannot be synthesized de novo; therefore, cells must receive at least one copy of each organelle to survive. Currently, many of the details of how the organelles are distributed are not yet fully elucidated.
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One of the distinguishing features of eukaryotic cells is that they contain membrane-bound organelles, such as the nucleus and mitochondria, that carry out specialized functions. Since biological membranes are only selectively permeable to solutes, they help create a compartment with controlled conditions inside an organelle. These microenvironments are tailored to the organelle's specific functions and help isolate them from the surrounding cytosol.
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Eukaryotic Compartmentalizations01:46

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One of the distinguishing features of eukaryotic cells is that they contain membrane-bound organelles, such as the nucleus and mitochondria, that carry out specialized functions. Since biological membranes are only selectively permeable to solutes, they help create a compartment with controlled conditions inside an organelle. These microenvironments are tailored to the organelle's specific functions and help isolate them from the surrounding cytosol.
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Lysosomes are the site for the degradation of macromolecules and biological polymers released during membrane trafficking events such as secretory, endocytic, autophagic, and phagocytic pathways. The membrane-enclosed area of the lysosome, called the lumen, contains hydrolytic enzymes active in an acidic environment. These acid hydrolases are functional at a pH between 4.5 and 5 and are involved in cellular processes such as cell signaling, energy metabolism, restoration of the plasma membrane,...
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Aip1p Dynamics Are Altered by the R256H Mutation in Actin
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More Cytoplasm, More Problems.

Predrag Jevtić1, Daniel L Levy1

  • 1Department of Molecular Biology, University of Wyoming, Laramie, WY 82071, USA.

Developmental Cell
|May 10, 2017
PubMed
Summary
This summary is machine-generated.

Large cytoplasmic volume impairs chromosome segregation fidelity during meiosis in mouse oocytes. This impacts spindle pole formation, chromosome alignment, and checkpoint signaling, leading to errors in meiosis.

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Area of Science:

  • Cell Biology
  • Developmental Biology
  • Genetics

Background:

  • Meiosis is a critical cell division process for sexual reproduction.
  • Accurate chromosome segregation is essential for preventing aneuploidy.
  • Factors influencing meiotic fidelity in oocytes are not fully understood.

Purpose of the Study:

  • To investigate the impact of cytoplasmic volume on chromosome segregation during mouse oocyte meiosis.
  • To identify specific cellular processes affected by increased cytoplasmic volume.

Main Methods:

  • Analysis of mouse oocytes with varying cytoplasmic volumes.
  • Microscopy techniques to assess spindle pole morphology and chromosome alignment.
  • Evaluation of checkpoint signaling stringency.

Main Results:

  • Increased cytoplasmic volume alters spindle pole morphology.
  • Chromosome alignment is compromised in large oocytes.
  • Checkpoint signaling stringency is reduced, leading to errors.
  • Meiotic errors, such as aneuploidy, are more frequent.

Conclusions:

  • Cytoplasmic volume is a critical determinant of meiotic fidelity in mouse oocytes.
  • Large cytoplasmic volume predisposes oocytes to chromosome segregation errors.
  • Understanding these mechanisms is crucial for reproductive health research.