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A Mr 7 kDa protein is present in both plasma and nuclear membranes in multidrug-resistant ovarian cancer cells

X Yang1, M Page

  • 1UNIV LAVAL,FAC MED,DEPT BIOCHEM,ST FOY,PQ G1K 7P4,CANADA.

Oncology Reports
|May 20, 2011
PubMed

Insights

A 7 kDa protein (P7) overexpressed in ovarian cancer cells is found in both plasma and nuclear membranes. This protein

Area of Science:

  • Oncology
  • Cell Biology
  • Molecular Biology

Background:

  • A 7 kDa protein, designated P7, is overexpressed on the plasma membrane of ovarian cancer cells.
  • Previous studies indicated P7's involvement in the proliferation of multidrug-resistant (MDR) ovarian cancer cells.

Purpose of the Study:

  • To investigate the subcellular localization of P7 in ovarian cancer cells.
  • To explore the potential role of P7 in signal transduction pathways within these cells.

Main Methods:

  • Cell fractionation to isolate cellular components.
  • Indirect immunofluorescence microscopy to confirm protein localization.

Main Results:

  • P7 was detected in both microsomal and nuclear fractions of ovarian cancer cells.
  • Immunofluorescence confirmed P7 presence on both plasma and nuclear membranes.
  • P7's localization on the nuclear membrane was observed.

Conclusions:

  • P7 is not exclusively located on the plasma membrane but also present in the nucleus.
  • The nuclear membrane localization of P7 suggests a potential role in mediating signal transduction in ovarian cancer cells.
  • Further research is warranted to elucidate P7's precise function in ovarian cancer proliferation and survival.

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