Stimulation of tumor cell growth in vitro by a monoclonal antibody to a tumor specific protein (TSP-180) present on the cell surface of 3LL cells

A. Sacchi, G. Piaggio, M. A. Rizzo, R. Falcioni, Stephen Kennel

Research output: Contribution to journalArticle

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Abstract

Proliferation capacity and MHC class I antigen expression of two Lewis lung carcinoma (3LL) metastatic variants (C87, BC215) grown under defined experimental conditions (serum-free defined medium or 10 per cent serum) have been studied following exposure to Mo Ab 135-13C which recognizes on these cells a tumor surface protein of 180000 daltons (TSP-180). The results of this study indicate that the high metastatic clone (C87) binds higher amounts of MoAb to TSP-180 and Db antigens than does the low metastatic one (BC215), while both clones express very low amounts of Kb antigens. 3LL clones grown in 10 per cent serum or adapted in serum-free, defined medium show the same metastatic phenotype and MHC class I antigen expression, but when grown in defined medium exhibit increased capacity to bind MoAb 135-13C. However, the relative binding rate of 3LL clones grown in 10 per cent serum or in defined medium is unchanged: the high metastatic clone always showing higher capacity to bind MoAb to TSP-180. Furthermore, comparison of EGF binding sites on the cell surface of 3LL clones, grown in different culture conditions, demonstrates that the C87 clone binds higher amounts of labelled EGF and that this amount increases in serum-free defined medium, exactly as reported for TSP-180. In addition, competition experiments demonstrated that MoAb 135-13C does not compete for EGF binding sites on 3LL cell surface. Studies on cell proliferation following exposure to MoAb 135-13C, revealed that the low metastatic clone (BC215) is more actively stimulated than the high metastatic one. Moreover, similar data were obtained after exposure of 3LL clones to physiological amounts of different growth factors (i.e. EGF, MSA, insulin). Analysis of MHC class I antigen expression following exposure to MoAb 13S-13C indicated that MoAb 135-13C induces on the cell surface of the C87 clone a transient low modulation of Db antigens. These results suggest that 3LL cells endowed with lower metastatic potential are more dependent on the microenvironmental conditions than the high metastasizing ones, and that MoAb 135-13C binding to 3LL cell surface stimulates proliferation as reported for several known growth factors.

Original languageEnglish (US)
Pages (from-to)41-54
Number of pages14
JournalClinical & Experimental Metastasis
Volume7
Issue number1
DOIs
StatePublished - Jan 1 1989
Externally publishedYes

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Membrane Proteins
Clone Cells
Monoclonal Antibodies
Growth
Neoplasms
Proteins
Epidermal Growth Factor
Histocompatibility Antigens Class I
Serum-Free Culture Media
Antigens
Intercellular Signaling Peptides and Proteins
Serum
Binding Sites
In Vitro Techniques
Lewis Lung Carcinoma
Cell Proliferation
Insulin
Phenotype

All Science Journal Classification (ASJC) codes

  • Oncology
  • Cancer Research

Cite this

Stimulation of tumor cell growth in vitro by a monoclonal antibody to a tumor specific protein (TSP-180) present on the cell surface of 3LL cells. / Sacchi, A.; Piaggio, G.; Rizzo, M. A.; Falcioni, R.; Kennel, Stephen.

In: Clinical & Experimental Metastasis, Vol. 7, No. 1, 01.01.1989, p. 41-54.

Research output: Contribution to journalArticle

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abstract = "Proliferation capacity and MHC class I antigen expression of two Lewis lung carcinoma (3LL) metastatic variants (C87, BC215) grown under defined experimental conditions (serum-free defined medium or 10 per cent serum) have been studied following exposure to Mo Ab 135-13C which recognizes on these cells a tumor surface protein of 180000 daltons (TSP-180). The results of this study indicate that the high metastatic clone (C87) binds higher amounts of MoAb to TSP-180 and Db antigens than does the low metastatic one (BC215), while both clones express very low amounts of Kb antigens. 3LL clones grown in 10 per cent serum or adapted in serum-free, defined medium show the same metastatic phenotype and MHC class I antigen expression, but when grown in defined medium exhibit increased capacity to bind MoAb 135-13C. However, the relative binding rate of 3LL clones grown in 10 per cent serum or in defined medium is unchanged: the high metastatic clone always showing higher capacity to bind MoAb to TSP-180. Furthermore, comparison of EGF binding sites on the cell surface of 3LL clones, grown in different culture conditions, demonstrates that the C87 clone binds higher amounts of labelled EGF and that this amount increases in serum-free defined medium, exactly as reported for TSP-180. In addition, competition experiments demonstrated that MoAb 135-13C does not compete for EGF binding sites on 3LL cell surface. Studies on cell proliferation following exposure to MoAb 135-13C, revealed that the low metastatic clone (BC215) is more actively stimulated than the high metastatic one. Moreover, similar data were obtained after exposure of 3LL clones to physiological amounts of different growth factors (i.e. EGF, MSA, insulin). Analysis of MHC class I antigen expression following exposure to MoAb 13S-13C indicated that MoAb 135-13C induces on the cell surface of the C87 clone a transient low modulation of Db antigens. These results suggest that 3LL cells endowed with lower metastatic potential are more dependent on the microenvironmental conditions than the high metastasizing ones, and that MoAb 135-13C binding to 3LL cell surface stimulates proliferation as reported for several known growth factors.",
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N2 - Proliferation capacity and MHC class I antigen expression of two Lewis lung carcinoma (3LL) metastatic variants (C87, BC215) grown under defined experimental conditions (serum-free defined medium or 10 per cent serum) have been studied following exposure to Mo Ab 135-13C which recognizes on these cells a tumor surface protein of 180000 daltons (TSP-180). The results of this study indicate that the high metastatic clone (C87) binds higher amounts of MoAb to TSP-180 and Db antigens than does the low metastatic one (BC215), while both clones express very low amounts of Kb antigens. 3LL clones grown in 10 per cent serum or adapted in serum-free, defined medium show the same metastatic phenotype and MHC class I antigen expression, but when grown in defined medium exhibit increased capacity to bind MoAb 135-13C. However, the relative binding rate of 3LL clones grown in 10 per cent serum or in defined medium is unchanged: the high metastatic clone always showing higher capacity to bind MoAb to TSP-180. Furthermore, comparison of EGF binding sites on the cell surface of 3LL clones, grown in different culture conditions, demonstrates that the C87 clone binds higher amounts of labelled EGF and that this amount increases in serum-free defined medium, exactly as reported for TSP-180. In addition, competition experiments demonstrated that MoAb 135-13C does not compete for EGF binding sites on 3LL cell surface. Studies on cell proliferation following exposure to MoAb 135-13C, revealed that the low metastatic clone (BC215) is more actively stimulated than the high metastatic one. Moreover, similar data were obtained after exposure of 3LL clones to physiological amounts of different growth factors (i.e. EGF, MSA, insulin). Analysis of MHC class I antigen expression following exposure to MoAb 13S-13C indicated that MoAb 135-13C induces on the cell surface of the C87 clone a transient low modulation of Db antigens. These results suggest that 3LL cells endowed with lower metastatic potential are more dependent on the microenvironmental conditions than the high metastasizing ones, and that MoAb 135-13C binding to 3LL cell surface stimulates proliferation as reported for several known growth factors.

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