Abstract

In preliminary studies we have observed the overexpression and overproduction of P-glycoprotein in precancerous liver and hepatocellular carcinoma (HCC) tissue from woodchuck hepatitis virus (WHV) carrier woodchucks and its absence or low level in uninfected liver. Immunocytochemical studies have localized the protein to the canalicular face of hepatocytes. Northern blot analysis of total cellular RNA using cDNA probes specific for P-glycoprotein has identified a high level of transcription in tumor tissue. These studies provide the foundation for a pilot project to study the expression of P-glycoprotein in different pathophysiological states in the liver and the possible role of WHV in P- glycoprotein expression. The tools are available to study both the cellular localization and the molecular mechanism of transcription and translation of the protein. These studies may enable us to understand the selective mechanisms which result in the development of clonal tumors which express multidrug resistance.

  Funding Agency

Agency
National Institute of Health (NIH)
Institute
National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
Type
Center Core Grants (P30)
Project #
1P30DK041296-01
Application #
3897667
Study Section
Project Start
Project End
Budget Start
Budget End
Support Year
1
Fiscal Year
1989
Total Cost
Indirect Cost

  Institution

Name
Albert Einstein College of Medicine
Department
Type
DUNS #
009095365
City
Bronx
State
NY
Country
United States
Zip Code
10461

  Publications

Walters, Ryan O; Arias, Esperanza; Diaz, Antonio et al. (2018) Sarcosine Is Uniquely Modulated by Aging and Dietary Restriction in Rodents and Humans. Cell Rep 25:663-676.e6
Liu, Zhongbo; Apontes, Pasha; Fomenko, Ekaterina V et al. (2018) Mangiferin Accelerates Glycolysis and Enhances Mitochondrial Bioenergetics. Int J Mol Sci 19:
Tekirdag, Kumsal; Cuervo, Ana Maria (2018) Chaperone-mediated autophagy and endosomal microautophagy: Joint by a chaperone. J Biol Chem 293:5414-5424
Zhao, Rongbao; Najmi, Mitra; Aluri, Srinivas et al. (2018) Concentrative Transport of Antifolates Mediated by the Proton-Coupled Folate Transporter (SLC46A1); Augmentation by a HEPES Buffer. Mol Pharmacol 93:208-215
Amengual, Jaume; Guo, Liang; Strong, Alanna et al. (2018) Autophagy Is Required for Sortilin-Mediated Degradation of Apolipoprotein B100. Circ Res 122:568-582
Schneider, Michael; Kumar, Vivek; Nordstrøm, Lars Ulrik et al. (2018) Inhibition of Delta-induced Notch signaling using fucose analogs. Nat Chem Biol 14:65-71
Iqbal, Niloy Jafar; Lu, Zhonglei; Liu, Shun Mei et al. (2018) Cyclin-dependent kinase 4 is a preclinical target for diet-induced obesity. JCI Insight 3:
Galsgaard, Katrine D; Winther-Sørensen, Marie; Ørskov, Cathrine et al. (2018) Disruption of glucagon receptor signaling causes hyperaminoacidemia exposing a possible liver-alpha-cell axis. Am J Physiol Endocrinol Metab 314:E93-E103
Shen, Ling; Liu, Yin; Tso, Patrick et al. (2018) Silencing steroid receptor coactivator-1 in the nucleus of the solitary tract reduces estrogenic effects on feeding and apolipoprotein A-IV expression. J Biol Chem 293:2091-2101
Dulyaninova, Natalya G; Ruiz, Penelope D; Gamble, Matthew J et al. (2018) S100A4 regulates macrophage invasion by distinct myosin-dependent and myosin-independent mechanisms. Mol Biol Cell 29:632-642

Showing the most recent 10 out of 451 publications