The long term goals of this proposal are to study the basic mechanisms of gene regulation in hepatoma cells at the molecular level, and to better understand the characteristics and possible function of hepatoma-associated nonhistone proteins. We have produced antibodies to hepatoma nonhistone proteins which are present in active chromatin of hepatoma. In this application we propose to isolate and characterize these nonhistone proteins. Antibodies to hepatoma-associated nonhistone proteins will be linked to agarose and used to isolate immunogenic hepatoma nonhistone proteins associated with active chromatin. Purified nonhistone proteins will be characterized by analytical electrofocusing, tryptic peptide mapping, amino acid analysis and sequencing. Chemical modification of these nonhistone proteins will also be studied. In addition to these, proteins will be used to raise monospecific antibodies in rabbits or to produce monoclonal antibodies in hybridoma cells. Monospecific antibodies will be used to isolate specific mRNA for cloning or will be used as probes to screen specific cDNA clones from a rat hepatoma cDNA library in Lambda gt 11. Cloned cDNAs complimentary to hepatoma-associated nonhistone protein mRNAs will be used as probes to study the differential expression of the corresponding genes in normal rat liver, hepatoma and other tissus.

Agency
National Institute of Health (NIH)
Institute
National Cancer Institute (NCI)
Type
Research Project (R01)
Project #
1R01CA042969-01
Application #
3184758
Study Section
Pathobiochemistry Study Section (PBC)
Project Start
1986-08-01
Project End
1991-07-31
Budget Start
1986-08-01
Budget End
1987-07-31
Support Year
1
Fiscal Year
1986
Total Cost
Indirect Cost
Name
University of Vermont & St Agric College
Department
Type
Schools of Medicine
DUNS #
066811191
City
Burlington
State
VT
Country
United States
Zip Code
05405
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Kilianska, Z; Krajewska, W M; Xie, R L et al. (1991) Hepatoma-associated nuclear matrix nonhistone antigens. J Cell Biochem 45:303-10
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Fukuda, K; Xie, R L; Chiu, J F (1991) Demonstration of cross-linked cytokeratin polypeptides in transplantable rat hepatoma cells. Biochem Biophys Res Commun 176:441-6
Fukuda, K; Xie, R L; Chiu, J F (1991) Bidirectional morphological changes induced by dexamethasone in Morris hepatoma cell lines McA-RH7777 and McA-RH8994: independence of fibronectin and its receptor. Exp Cell Res 195:207-13
Kilianska, Z; Ditulio, P; Chiu, J F (1990) Hepatoma-associated non-histone proteins are phosphoproteins preferentially localized in nuclear matrix. Int J Biochem 22:969-75
Fukuda, K; Dong, J M; Chiu, J F (1990) Association of fibronectin-like antigens in chromatin preparations from rat hepatoma cells. Arch Biochem Biophys 283:401-8
Dong, J M; Kilianska, Z; Fukuda, K et al. (1990) The appearance of hepatoma-associated chromosomal non-histone proteins in rat liver after a single dose of 3'-MDAB followed by treatment of phenobarbital. Cancer Lett 51:259-67
Zhang, X K; Huang, D P; Qiu, D K et al. (1990) The expression of c-myc and c-N-ras in human cirrhotic livers, hepatocellular carcinomas and liver tissue surrounding the tumors. Oncogene 5:909-14

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