Proteasome inhibitors suppress expression of NPM and ARF proteins.
Summary of "Proteasome inhibitors suppress expression of NPM and ARF proteins."
Proteasome inhibitors stabilize numerous proteins by inhibiting their degradation. Previously we have demonstrated that proteasome inhibitors thiostrepton, MG132 and bortezomib paradoxically inhibit transcriptional activity and mRNA/protein expression of FOXM1. Here we demonstrate that, in addition to FOXM1, the same proteasome inhibitors also decrease mRNA and protein expression of NPM and ARF genes. These data suggest that proteasome inhibitors may suppress gene expression by stabilizing their transcriptional inhibitors.
Affiliation
Department of Medicine; University of Illinois at Chicago; Chicago, IL USA.
Journal Details
This article was published in the following journal.
Name: Cell cycle (Georgetown, Tex.)
ISSN: 1551-4005
Pages:
Links
- PubMed Source: http://www.ncbi.nlm.nih.gov/pubmed/22071628
- DOI: http://dx.doi.org/
Medical and Biotech [MESH] Definitions
Ubiquitination
The act of ligating UBIQUITINS to PROTEINS to form ubiquitin-protein ligase complexes to label proteins for transport to the PROTEASOME ENDOPEPTIDASE COMPLEX where proteolysis occurs.
Gaba Uptake Inhibitors
Compounds that suppress or block the plasma membrane transport of GAMMA-AMINOBUTYRIC ACID by GABA PLASMA MEMBRANE TRANSPORT PROTEINS.
Proteasome Endopeptidase Complex
A large multisubunit complex that plays an important role in the degradation of most of the cytosolic and nuclear proteins in eukaryotic cells. It contains a 700-kDa catalytic sub-complex and two 700-kDa regulatory sub-complexes. The complex digests ubiquitinated proteins and protein activated via ornithine decarboxylase antizyme.
Homeodomain Proteins
Proteins encoded by homeobox genes (GENES, HOMEOBOX) that exhibit structural similarity to certain prokaryotic and eukaryotic DNA-binding proteins. Homeodomain proteins are involved in the control of gene expression during morphogenesis and development (GENE EXPRESSION REGULATION, DEVELOPMENTAL).
Neoplasm Proteins
Proteins whose abnormal expression (gain or loss) are associated with the development, growth, or progression of NEOPLASMS. Some neoplasm proteins are tumor antigens (ANTIGENS, NEOPLASM), i.e. they induce an immune reaction to their tumor. Many neoplasm proteins have been characterized and are used as tumor markers (TUMOR MARKERS, BIOLOGICAL) when they are detectable in cells and body fluids as monitors for the presence or growth of tumors. Abnormal expression of ONCOGENE PROTEINS is involved in neoplastic transformation, whereas the loss of expression of TUMOR SUPPRESSOR PROTEINS is involved with the loss of growth control and progression of the neoplasm.
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