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Glycosphingolipid expression in solid tumours and transformed cell lines

B Berra1, I Colombo, E Monteggia

  • 1Institute of General Physiology and Biochemistry, School of Pharmacy, University of Milano, Italy. Berra@imiucca.csi.unimi.it

Indian Journal of Biochemistry & Biophysics
|February 1, 1997
PubMed
Summary

Changes in glycosphingolipids, crucial for cell interactions, are linked to cancer. This study analyzes ganglioside profiles in tumors and transformed cells, revealing specific alterations and enzyme correlations.

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Area of Science:

  • Biochemistry
  • Cell Biology
  • Oncology

Background:

  • Glycosphingolipids are vital for cell-cell and cell-substrate interactions.
  • Altered cell surface glycolipid profiles are observed in malignant transformations and
  • social disorders".

Purpose of the Study:

  • To investigate ganglioside composition changes in various solid tumors and transformed cell lines.
  • To correlate ganglioside patterns with key metabolic enzymes.

Main Methods:

  • Analysis of ganglioside composition in tumor models and cell lines.
  • Correlation of ganglioside profiles with sialyltransferase (SAT) and neuraminidase activities.

Main Results:

  • Meningiomas showed GD3 predominance with chromosome 22 deletion and GM3 predominance without, correlating with SAT-2 activity.

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  • Mammary carcinomas exhibited GM3 accumulation, correlating with tumor size.
  • Transformed cells (SGS/3A, SVT2) displayed altered ganglioside profiles (e.g., GM3, GM2) and reduced sialyltransferase activity compared to normal fibroblasts (FG, 3T3).

    • Conclusions:

    • Ganglioside profile alterations are associated with malignant transformation.
    • Specific gangliosides (GM3, GD3) and enzyme activities (SATs) show correlations with tumor type and progression.