It is the long term goal of these experiments to define, eventually at the molecular level, the mechanisms by which malignant transformation is induced and the mechanisms by which it is suppressed. Direct induction of transformation in hamster cells by methylating agents which are carcinogenic but not mutagenic will be measured and correlated with alterations in cellular DNA methylation levels and with tumorigenicity to determine if methylation-associated changes in gene regulation can be responsible for carcinogenesis. Cell fusions will be performed among hamster cells and between hamster and human cells which have been treated to induce tetraploidy in order to determine if the suppression of neoplastic transformation observed in fusions between normal and transformed diploid cells can be overcome by increased dosage of transformed cell chromosomes. DNA from tumor cell lines will be transfected into an unusual BHK hamster cell line which is unable to suppress transformation in order to attempt to detect and identify human oncogenes which are distinct from those isolated to date from human cells either in the way in which they are regulated or in their primary sequence. A dominant selective marker will be introduced to normal human chromosome #1 and used as a marker in cell fusions designed to test whether or not this human chromosome can suppress the malignancy of human tumor cell lines.

Agency
National Institute of Health (NIH)
Institute
National Cancer Institute (NCI)
Type
Research Project (R01)
Project #
2R01CA027306-07
Application #
3167548
Study Section
Chemical Pathology Study Section (CPA)
Project Start
1979-06-01
Project End
1988-05-31
Budget Start
1985-06-01
Budget End
1986-05-31
Support Year
7
Fiscal Year
1985
Total Cost
Indirect Cost
Name
Northwestern University at Chicago
Department
Type
School of Medicine & Dentistry
DUNS #
005436803
City
Chicago
State
IL
Country
United States
Zip Code
60611
Dameron, K M; Volpert, O V; Tainsky, M A et al. (1994) The p53 tumor suppressor gene inhibits angiogenesis by stimulating the production of thrombospondin. Cold Spring Harb Symp Quant Biol 59:483-9
Klein, K G; Bouck, N P (1994) The distal region of the long arm of human chromosome 1 carries tumor suppressor activity for a human fibrosarcoma line. Cancer Genet Cytogenet 73:109-21
Tolsma, S S; Cohen, J D; Ehrlich, L S et al. (1993) Transformation of NIH/3T3 to anchorage independence by H-ras is accompanied by loss of suppressor activity. Exp Cell Res 205:232-9
Benton, B K; Volpert, O V; Bouck, N P (1993) Influence of a hamster tumor suppressor gene on transformation by viral and cellular oncogenes. Carcinogenesis 14:1209-14
Rastinejad, F; Polverini, P J; Bouck, N P (1989) Regulation of the activity of a new inhibitor of angiogenesis by a cancer suppressor gene. Cell 56:345-55
Bouck, N P; Benton, B K (1989) Loss of cancer suppressors, a driving force in carcinogenesis. Chem Res Toxicol 2:1-11
Cohen, J D; Robins, H I; Mulcahy, R T et al. (1988) Interactions between hyperthermia and irradiation in two human lymphoblastic leukemia cell lines in vitro. Cancer Res 48:3576-80
Weitzman, S; Schmeichel, C; Turk, P et al. (1988) Phagocyte-mediated carcinogenesis: DNA from phagocyte-transformed C3H 10T1/2 cells can transform NIH/3T3 cells. Ann N Y Acad Sci 551:103-9;discussion 110
Tolsma, S S; Thomas, E; Bauer, K D et al. (1988) Genetic assessment of the strength of a cancer suppressor gene in hamster cells. Cancer Res 48:46-51
Bouck, N; Stoler, A; Polverini, P J (1986) Coordinate control of anchorage independence, actin cytoskeleton, and angiogenesis by human chromosome 1 in hamster-human hybrids. Cancer Res 46:5101-5

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