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Tsigelny I, Burton DW, Sharikov Y, et al. Coherent expression chromosome cluster analysis reveals differential regulatory functions of amino-terminal and distal parathyroid hormone-related protein domains in prostate carcinoma. J Biomed Biotechnol. 2005;2005(4):353-63doi: 10.1155/JBB.2005.353.
Tsigelny, I., Burton, D. W., Sharikov, Y., Hastings, R. H., & Deftos, L. J. (2005). Coherent expression chromosome cluster analysis reveals differential regulatory functions of amino-terminal and distal parathyroid hormone-related protein domains in prostate carcinoma. Journal of biomedicine & biotechnology, 2005(4), 353-63. https://doi.org/10.1155/JBB.2005.353
Tsigelny, I, et al. "Coherent expression chromosome cluster analysis reveals differential regulatory functions of amino-terminal and distal parathyroid hormone-related protein domains in prostate carcinoma." Journal of biomedicine & biotechnology vol. 2005,4 (2005): 353-63. doi: https://doi.org/10.1155/JBB.2005.353
Tsigelny I, Burton DW, Sharikov Y, Hastings RH, Deftos LJ. Coherent expression chromosome cluster analysis reveals differential regulatory functions of amino-terminal and distal parathyroid hormone-related protein domains in prostate carcinoma. J Biomed Biotechnol. 2005;2005(4):353-63. doi: 10.1155/JBB.2005.353. PMID: 16489268; PMCID: PMC1361488.
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J Biomed Biotechnol. 2005;2005(4):353-63. doi: 10.1155/JBB.2005.353.

Coherent expression chromosome cluster analysis reveals differential regulatory functions of amino-terminal and distal parathyroid hormone-related protein domains in prostate carcinoma.

Journal of biomedicine & biotechnology

I Tsigelny, D W Burton, Y Sharikov, R H Hastings, L J Deftos

Affiliations

  1. Department of Chemistry and Biochemistry, University of California, San Diego, CA 92093-0654, USA. [email protected]

PMID: 16489268 PMCID: PMC1361488 DOI: 10.1155/JBB.2005.353

Abstract

Parathyroid hormone-related protein (PTHrP) has a number of cancer-related actions. While best known for causing hypercalcemia of malignancy, it also has effects on cancer cell growth, apoptosis, and angiogenesis. Studying the actions of PTHrP in human cancer is complicated because there are three isoforms and many derived peptides. Several peptides are biologically active at known or presumed cell surface receptors; in addition, the PTHrP-derived molecules can exert effects at the cell nucleus. To address this complexity, we studied gene expression in a DU 145 prostate cancer cell line that was stably transfected with control vector, PTHrP 1-173 and PTHrP 33-173. With this model, regulatory effects of the amino-terminal portion of PTHrP would result only from transduction with the full-length molecule, while effects pertaining to distal sequences would be evident with either construct. Analysis of the expression profiles by microarrays demonstrated nonoverlapping groups of differentially expressed genes. Amino-terminal PTHrP affected groups of genes involved in apoptosis, prostaglandin and sex steroid metabolism, cell-matrix interactions, and cell differentiation, while PTHrP 33-173 caused substantial increases in MHC class I antigen expression. This work demonstrates the distinct biological actions of the amino-terminus compared to distal mid-molecule or carboxy-terminal sequences of PTHrP in prostate carcinoma cells and provides targets for further study of the malignant process.

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