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Regulation of Expression Occurs at Multiple Steps02:24

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Gene expression can be regulated at almost every step from gene to protein. Transcription is the step that is most commonly regulated. This involves the binding of proteins to short regulatory sequences on the DNA. This association can either promote or inhibit the transcription of a gene associated with the respective sequence.
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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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Gene expression in prokaryotes is governed by constitutive and regulated systems, allowing cells to balance the production of essential proteins with adaptive responses to environmental changes.Constitutive Gene ExpressionConstitutive, or housekeeping, genes are continuously expressed as they encode proteins vital for fundamental cellular processes. These include enzymes for glycolysis, ribosomal components for protein synthesis, and proteins involved in DNA replication. Their constant...
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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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C5L2 Regulates DMP1 Expression during Odontoblastic Differentiation.

F Chmilewsky1, R Liang1, M Kanazawa1

  • 11 Department of Oral Biology, University of Illinois at Chicago, Chicago, IL, USA.

Journal of Dental Research
|February 1, 2019
PubMed
Summary
This summary is machine-generated.

Dental pulp stem cells express C5L2, a receptor involved in odontoblastic differentiation. This study identifies C5L2 as a negative regulator of dentin matrix protein 1 expression, impacting dentin-pulp regeneration.

Keywords:
TNF-alphadentin matrix protein 1inflammationpulp biologyreparative dentinogenesisstem cell

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Area of Science:

  • Biomedical Science
  • Stem Cell Biology
  • Regenerative Medicine

Background:

  • Dentin-pulp regeneration involves stem cell differentiation into odontoblasts.
  • Complement system activation is crucial for progenitor recruitment and nerve sprouting.
  • The role of complement receptor C5a receptor-like 2 (C5L2) in odontoblastic differentiation remains unexplored.

Purpose of the Study:

  • To investigate C5L2 expression in human dental pulp stem cells (hDPSCs).
  • To determine the role of C5L2 in odontoblastic differentiation of hDPSCs.
  • To elucidate the impact of C5L2 on dentin matrix protein 1 (DMP1) expression.

Main Methods:

  • Immunohistochemistry on human molar pulp sections.
  • In vitro immunofluorescence staining of hDPSCs.
  • Real-time polymerase chain reaction (RT-PCR) for gene expression analysis.
  • C5L2-siRNA silencing to inhibit receptor expression.

Main Results:

  • C5L2 co-localizes with mesenchymal stem cell markers (STRO1) in a perivascular pattern.
  • hDPSCs express C5L2, with its expression modulated during odontoblastic differentiation.
  • Tumor necrosis factor alpha (TNFα) potentiates C5L2 expression.
  • C5L2 silencing negatively impacts DMP1 expression, indicating C5L2 is a negative regulator.

Conclusions:

  • C5L2 expression correlates with odontoblastic differentiation in hDPSCs.
  • C5L2 acts as a negative regulator of DMP1 expression during odontoblastic differentiation and inflammation.
  • Findings offer insights into stem cell function and potential applications in dentin-pulp engineering.