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Related Concept Videos

Master Transcription Regulators02:23

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Master transcription regulators are regulatory proteins that are predominantly responsible for regulating the expression of multiple genes. Often these genes work in concert to drive a  complex process. Activation of a master transcription regulator can lead to a cascade of transcriptional activation necessary for that outcome. These regulators can directly bind to the regulatory sequences of the various genes involved, or they can indirectly regulate transcription by binding to regulatory...
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Nuclear protein sorting regulates nucleus composition and gene expression, crucial for determining the fate of a eukaryotic cell. Hence, the entry and exit of molecules across the nuclear envelope is a tightly controlled process. Nuclear protein sorting can be inhibited by one of the following ways: 1) masking cargo signal sequences, 2) modifying the nuclear receptor's affinity for cargo, 3) controlling the nuclear pore size, 4) retaining the cargo during its transit to the cytosol or the...
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Common myeloid progenitors (CMPs) are oligopotent cells that can differentiate into granulocytes and macrophages. Granulocytes and macrophages are essential for protecting the body against bacterial, viral, or fungal infections. They migrate from the bone marrow into the circulating blood to reach specific tissue sites where they differentiate and help in immune surveillance. However, they survive only for a few days and must be continuously made available to the organism to maintain a robust...
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The gene expression in cells is regulated at different stages: (i) transcription, (ii) RNA processing, (iii) RNA localization, and (iv) translation. Transcriptional regulation is mediated by regulatory proteins such as transcription factors, activators, or repressors—these control gene expression by initiating or inhibiting the transcription of genes. Once a precursor or pre-mRNA is produced, it undergoes post-transcriptional modification, including 5' capping, splicing, and the...
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Preparation of Rat Oligodendrocyte Progenitor Cultures and Quantification of Oligodendrogenesis Using Dual-infrared Fluorescence Scanning
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Karyopherin Alpha Proteins Regulate Oligodendrocyte Differentiation.

Benjamin M Laitman1,2,3, John N Mariani1,2,3, Chi Zhang1,2,3

  • 1Friedman Brain Institute, New York, New York, United States of America.

Plos One
|January 21, 2017
PubMed
Summary
This summary is machine-generated.

Karyopherin alpha (Kpna) proteins regulate oligodendrocyte differentiation essential for myelin repair. Specific Kpnas play distinct roles, offering therapeutic targets for central nervous system repair.

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Area of Science:

  • Neuroscience
  • Cell Biology
  • Molecular Biology

Background:

  • Oligodendrocyte (OL) differentiation is crucial for central nervous system (CNS) myelin formation and repair.
  • Nuclear import, regulated by karyopherin alpha (Kpna) proteins, controls transcription factor access to the genome.

Purpose of the Study:

  • To investigate the role of Kpna proteins in OL differentiation.
  • To understand how nuclear import regulates genomic access during OL differentiation.
  • To identify potential therapeutic targets for stimulating myelination and remyelination.

Main Methods:

  • Pharmacologic inactivation of Kpna proteins.
  • Analysis of OL differentiation rates, proliferation, and viability.
  • Differential expression analysis of Kpna subtypes in response to pro-myelinating cues (T3 and CNTF).

Main Results:

  • Kpna family members are expressed in OLs and regulate differentiation.
  • Pharmacologic inactivation of Kpnas dose-dependently decreased OL differentiation.
  • Specific Kpna subtypes (P/α2, Q/α3, S/α1) showed differential responses to T3 and CNTF.
  • Kpna4 (Q/α3) was upregulated by CNTF and its inactivation inhibited CNTF-induced OL differentiation without affecting proliferation or viability.

Conclusions:

  • Canonical nuclear import is integral to OL differentiation.
  • Specific Kpnas may have distinct functions downstream of different pro-myelinating stimuli.
  • Targeting specific Kpnas could be a therapeutic strategy for CNS repair.