This proposal represents a continuation of our studies on the structure and metabolism of cell surfaces glycoconjugates with special emphasis on Ehrlich ascites tumor (EAT) cells and activated murine peritoneal macrophages. It is proposed to continue study of the biosynthesis and degradation of the family of unique alpha-D-galactosyl-terminated glycoproteins which occur on the surface of EAT cells. Isolation and characterization of the biosynthetic and degradative enzymes will be undertaken. Similarly, structural and biosynthetic studies of a specific macrophage activation glycoprotein (MAG) will be conducted. In addition, structural studies on the carbohydrate residues of a basement membrane glycoprotein of great biological importance - laminin, of murine and human origin, are in progress. The methodologies to be employed in these investigations include chemical and physical techniques of carbohydrate chemistry, affinity chromatographic isolation of glycosyltransferases, lectin binding and precipitation studies, generation of clonal variants of EAT cells and the production of monoclonal antibodies against glycoproteins and defined sequences of carbohydrate, e.g. the Ga1 alpha1, 3Ga1 beta1, 4G1cNAc trisaccharide which occurs on the surface of EAT cells and on the laminin molecule. Using this monoclonal antibody we shall attempt to confer passive immunity in mice against Ehrlich ascites tumor cells.

Agency
National Institute of Health (NIH)
Institute
National Cancer Institute (NCI)
Type
Research Project (R01)
Project #
5R01CA020424-15
Application #
3165296
Study Section
Pathobiochemistry Study Section (PBC)
Project Start
1984-12-01
Project End
1995-02-28
Budget Start
1991-03-01
Budget End
1992-02-29
Support Year
15
Fiscal Year
1991
Total Cost
Indirect Cost
Name
University of Michigan Ann Arbor
Department
Type
Schools of Medicine
DUNS #
791277940
City
Ann Arbor
State
MI
Country
United States
Zip Code
48109
Roth, J; Goldstein, I J (1995) Subcellular distribution of terminal alpha-D- and beta-D-galactosyl residues in Ehrlich tumour cells studied by lectin-gold techniques. Glycoconj J 12:142-9
Song, Z; Varani, J; Goldstein, I J (1995) Expression and function of beta 1 integrins on adherent and nonadherent Ehrlich ascites tumor cells. Exp Cell Res 218:96-104
Roth, J; Li, W P; Knibbs, R N et al. (1994) Differential expression of cell surface sialoglycoconjugates on wild-type and cultured Ehrlich tumor cells as revealed by quantitative lectin-gold ultrastructural cytochemistry. Proc Natl Acad Sci U S A 91:11353-7
Chen, Y F; Boland, C R; Kraus, E R et al. (1994) The lectin Griffonia simplicifolia I-A4 (GS I-A4) specifically recognizes terminal alpha-linked N-acetylgalactosaminyl groups and is cytotoxic to the human colon cancer cell lines LS174t and SW1116. Int J Cancer 57:561-7
Knibbs, R N; MacCallum, D K; Lillie, J H et al. (1994) Wild-type and cultured Ehrlich ascites tumour cells differ in tumorigenicity, lectin binding patterns and binding to basement membranes. Glycobiology 4:419-28
Shigeta, S; Winter, H C; Goldstein, I J (1994) Alpha-(2-->3)- and alpha-(2-->6)-sialyltransferase activities present in three variants of Ehrlich tumor cells: identification of the products derived from N-acetyllactosamine and beta-D-Gal-(1-->3)-alpha-D-GalNAc-(1-->O)-Bn. Carbohydr Res 264:111-21
Knibbs, R N; Agrwal, N; Wang, J L et al. (1993) Carbohydrate-binding protein 35. II. Analysis of the interaction of the recombinant polypeptide with saccharides. J Biol Chem 268:14940-7
Song, Z; Varani, J; Goldstein, I J (1993) Differences in cell surface carbohydrates, and in laminin and fibronectin synthesis, between adherent and non-adherent Ehrlich ascites tumor cells. Int J Cancer 55:1029-35
Takagaki, M; Knibbs, R N; Roth, J et al. (1993) Monoclonal antibodies that recognize the trisaccharide epitope Gal alpha 1-3Gal beta 1-4GlcNAc present on Ehrlich tumor cell membrane glycoproteins. Histochemistry 100:139-47
Knibbs, R N; Osborne, S E; Glick, G D et al. (1993) Binding determinants of the sialic acid-specific lectin from the slug Limax flavus. J Biol Chem 268:18524-31

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