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Chromatin Position Affects Gene Expression

Chromatin is the massive complex of DNA and proteins packaged inside the nucleus. The complexity of chromatin folding and how it is packaged inside the nucleus greatly influences  access to genetic information. Generally, the nucleus' periphery is considered transcriptionally repressive, while the cell's interior is considered a transcriptionally active area. 
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Patient Derived Cell Culture and Isolation of CD133+ Putative Cancer Stem Cells from Melanoma
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Published on: March 13, 2013

CCN2 expression and localization in melanoma cells.

Wei Sha1, Andrew Leask

  • 1Department of Dentistry, Schulich School of Medicine of Dentistry, Dental Sciences Building, University of Western Ontario, London, ON, Canada, N6A 5C1.

Journal of Cell Communication and Signaling
|June 14, 2011
PubMed
Summary
This summary is machine-generated.

Connective tissue growth factor (CTGF, CCN2) is expressed in B16(F10) melanoma cells. Its expression is regulated by FAK/src and MEK/ERK pathways, suggesting CCN2 as a potential target for melanoma therapy.

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Area of Science:

  • Oncology
  • Molecular Biology
  • Biochemistry

Background:

  • The matricellular protein connective tissue growth factor (CTGF, CCN2) is overexpressed in various cancers.
  • Its role and expression in melanoma remain largely unknown.
  • Identifying novel therapeutic targets is crucial for effective anti-cancer strategies.

Purpose of the Study:

  • To investigate the expression of CCN2 in melanoma cells.
  • To elucidate the signaling pathways regulating CCN2 expression in melanoma.
  • To assess the potential of CCN2 as a therapeutic target in melanoma.

Main Methods:

  • Utilized the highly metastatic murine melanoma cell line B16(F10).
  • Employed real-time polymerase chain reaction (PCR) for mRNA detection of CCN family members.
  • Applied Western blot and immunofluorescence for CCN2 protein analysis.
  • Investigated signaling pathways using FAK/src inhibitor (PP2) and MEK/ERK inhibitor (U0126).

Main Results:

  • CCN2 mRNA and protein were detected in B16(F10) melanoma cells.
  • CCN2 expression was significantly reduced by PP2 and U0126, indicating downstream regulation by FAK/src and MEK/ERK pathways.
  • CCN1, CCN3, and CCN4 mRNA levels were unaffected or increased by PP2 and U0126.
  • CCN2 protein was localized exclusively to the nucleus of B16(F10) cells.

Conclusions:

  • CCN2 is expressed in murine melanoma cells and its expression is regulated by key oncogenic signaling pathways.
  • The nuclear localization of CCN2 suggests a specific functional role within melanoma cells.
  • CCN2 warrants further investigation as a potential therapeutic target for melanoma growth and progression.