Decreased tumorigenicity correlates with expression of altered cell surface carbohydrates in Lec9 CHO cells

J. Ripka, S. I. Shin, Pamela Stanley

Research output: Contribution to journalArticle

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Abstract

To investigate a role for surface carbohydrates in cellular malignancy, 15 different glycosylation-defective CHO cell mutants were examined for their tumorigenic and metastatic capacities after subcutaneous injection into nude mice. Most of the glycosylation mutants displayed similar or slightly decreased tumorigenicity compared with parental CHO cells. Neither parental CHO cells nor any of the mutants were observed to metastasize. However, independent isolates of one mutant type, Lec9, showed a dramatic reduction in tumor formation. The altered carbohydrates expressed at the surface of Lec9 cells appeared to be responsible for their loss of tumorigenicity, because revertants for lectin resistance were able to form tumors, and a double mutant (Lec9.Lec1) that expressed a Lec1 glycosylation phenotype also formed tumors. Finally, Lec9 cells were able to form tumors in γ-irradiated nude mice, suggesting that recognition by an irradiation-sensitive host cell(s) was responsible for their reduced tumorigenicity in untreated nude mice.

Original languageEnglish (US)
Pages (from-to)1268-1275
Number of pages8
JournalMolecular and Cellular Biology
Volume6
Issue number4
StatePublished - 1986

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CHO Cells
Carbohydrates
Glycosylation
Nude Mice
Neoplasms
Subcutaneous Injections
Lectins
Phenotype

ASJC Scopus subject areas

  • Cell Biology
  • Genetics
  • Molecular Biology

Cite this

Decreased tumorigenicity correlates with expression of altered cell surface carbohydrates in Lec9 CHO cells. / Ripka, J.; Shin, S. I.; Stanley, Pamela.

In: Molecular and Cellular Biology, Vol. 6, No. 4, 1986, p. 1268-1275.

Research output: Contribution to journalArticle

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