Molecular and Cellular Biochemistry

, Volume 276, Issue 1–2, pp 113–119 | Cite as

Changes in electric charge and phospholipids composition in human colorectal cancer cells

  • Izabela Dobrzyńska
  • Barbara Szachowicz-Petelska
  • Stanisław Sulkowski
  • Zbigniew Figaszewski


Cancer cells perform their malicious activities through own cell membranes that screen and transmit inhibitory and stimulatory signals out of the cells and into them. This work is focused on changes of phospholipids content (PI—phosphatidylinositol, PS—phosphatidylserine, PE—phosphatidylethanolamine, PC—phosphatidylcholine) and electric charge that occur in cell membranes of colorectal cancer of pT3 stage, various grades (G2, G3) and without/with metastasis. Qualitative and quantitative composition of phospholipids in the membrane was determined by HPLC (high-performance liquid chromatography). The surface charge density of colorectal cancer cell membranes was measured using electrophoresis. The measurements were carried out at various pH of solution. It was shown that the process of cancer transformation was accompanied by an increase in total amount of phospholipids as well as an increase in total positive charge at low pH and total negative charge at high pH. A malignant neoplasm cells with metastases are characterized by a higher PC/PE ratio than malignant neoplasm cells without metastases. (Mol Cell Biochem 276: 113–119, 2005)


phospholipids electric charge colorectal cancer cells 


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Copyright information

© Springer Science + Business Media, Inc. 2005

Authors and Affiliations

  • Izabela Dobrzyńska
    • 1
  • Barbara Szachowicz-Petelska
    • 1
  • Stanisław Sulkowski
    • 2
  • Zbigniew Figaszewski
    • 1
    • 3
  1. 1.Institute of ChemistryUniversity in BiałystokBiałystokPoland
  2. 2.Department of PathologyMedical University of BiałystokBiałystokPoland
  3. 3.Laboratory of Electrochemical Power Sources, Faculty of ChemistryUniversity of WarsawWarsawPoland

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