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A new variant of glycoprotein CD44 confers metastatic potential to rat carcinoma cells
U Günthert1, M Hofmann, W Rudy
1Institut für Genetik, Universität Karlsruhe, Federal Republic of Germany.
Cell
|April 5, 1991
Summary
Researchers identified a novel CD44 variant, pMeta-1, associated with cancer metastasis. Overexpression of this variant in non-metastasizing cells induced full metastatic behavior, highlighting its crucial role in tumor spread.
Area of Science:
- Molecular Biology
- Cancer Research
- Immunology
Background:
- CD44 is a cell surface glycoprotein implicated in cell adhesion.
- Metastasis is a complex process involving multiple molecular changes in cancer cells.
Purpose of the Study:
- To identify molecular markers associated with cancer metastasis.
- To investigate the role of novel CD44 variants in tumor progression.
Main Methods:
- Monoclonal antibody-based screening of rat pancreatic carcinoma cell lines.
- cDNA cloning and sequencing to identify novel gene variants.
- Expression analysis in metastasizing and non-metastasizing tumor cell lines and normal tissues.
- Functional studies involving gene overexpression in cell lines.
Main Results:
- Isolation of cDNA clones encoding glycoproteins with partial CD44 homology.
- Identification of a novel variant, pMeta-1, with an inserted extracellular domain.
- pMeta-1 expression is restricted to metastasizing tumor cell lines (BSp73 and 13762NF).
- Overexpression of pMeta-1 in non-metastasizing cells conferred full metastatic potential.
Conclusions:
- pMeta-1 represents a novel variant of CD44 associated with cancer metastasis.
- The pMeta-1 variant plays a critical role in establishing metastatic behavior.
- This finding offers potential diagnostic and therapeutic targets for metastatic cancers.
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