Effect of the heat shock protein HSP27 on androgen receptor expression and function in prostate cancer cells. 2012

Matthias B Stope, and Tina Schubert, and Doreen Staar, and Cindy Rönnau, and Andreas Streitbörger, and Nils Kroeger, and Constanze Kubisch, and Uwe Zimmermann, and Reinhard Walther, and Martin Burchardt
Department of Urology, Ernst Moritz Arndt University of Greifswald, Ferdinand-Sauerbruch-Straße, 17475, Greifswald, Germany. matthias.stope@uni-greifswald.de

OBJECTIVE Heat shock proteins (HSP) are involved in processes of folding, activation, trafficking and transcriptional activity of most steroid receptors including the androgen receptor (AR). Accumulating evidence links rising heat shock protein 27 (HSP27) levels with the development of castration-resistant prostate cancer. In order to study the functional relationship between HSP27 and the AR, we modulated the expression of the small heat shock protein HSP27 in human prostate cancer (PC) cell lines. METHODS HSP27 protein concentrations in LNCaP and PC-3 cells were modulated by over-expression or silencing of HSP27. The effects of HSP27 on AR protein and mRNA levels were monitored by Western blotting and quantitative RT-PCR. RESULTS Treatment for the AR-positive LNCaP with HSP27-specific siRNA resulted in a down-regulation of AR levels. This down-regulation of protein was paralleled by a decrease in AR mRNA. Most interestingly, over-expression of HSP27 in PC-3 cells led to a significant increase in AR mRNA although the cells were unable to produce functional AR protein. CONCLUSIONS The observation that HSP27 is involved in the regulation of AR mRNA by a yet unknown mechanism highlights the complexity of HSP27-AR signaling network.

UI MeSH Term Description Entries
D008297 Male Males
D011471 Prostatic Neoplasms Tumors or cancer of the PROSTATE. Cancer of Prostate,Prostate Cancer,Cancer of the Prostate,Neoplasms, Prostate,Neoplasms, Prostatic,Prostate Neoplasms,Prostatic Cancer,Cancer, Prostate,Cancer, Prostatic,Cancers, Prostate,Cancers, Prostatic,Neoplasm, Prostate,Neoplasm, Prostatic,Prostate Cancers,Prostate Neoplasm,Prostatic Cancers,Prostatic Neoplasm
D011944 Receptors, Androgen Proteins, generally found in the CYTOPLASM, that specifically bind ANDROGENS and mediate their cellular actions. The complex of the androgen and receptor migrates to the CELL NUCLEUS where it induces transcription of specific segments of DNA. Androgen Receptors,5 alpha-Dihydrotestosterone Receptor,Androgen Receptor,Dihydrotestosterone Receptors,Receptor, Testosterone,Receptors, Androgens,Receptors, Dihydrotestosterone,Receptors, Stanolone,Stanolone Receptor,Testosterone Receptor,5 alpha Dihydrotestosterone Receptor,Androgens Receptors,Receptor, 5 alpha-Dihydrotestosterone,Receptor, Androgen,Receptor, Stanolone,Stanolone Receptors,alpha-Dihydrotestosterone Receptor, 5
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000230 Adenocarcinoma A malignant epithelial tumor with a glandular organization. Adenocarcinoma, Basal Cell,Adenocarcinoma, Granular Cell,Adenocarcinoma, Oxyphilic,Adenocarcinoma, Tubular,Adenoma, Malignant,Carcinoma, Cribriform,Carcinoma, Granular Cell,Carcinoma, Tubular,Adenocarcinomas,Adenocarcinomas, Basal Cell,Adenocarcinomas, Granular Cell,Adenocarcinomas, Oxyphilic,Adenocarcinomas, Tubular,Adenomas, Malignant,Basal Cell Adenocarcinoma,Basal Cell Adenocarcinomas,Carcinomas, Cribriform,Carcinomas, Granular Cell,Carcinomas, Tubular,Cribriform Carcinoma,Cribriform Carcinomas,Granular Cell Adenocarcinoma,Granular Cell Adenocarcinomas,Granular Cell Carcinoma,Granular Cell Carcinomas,Malignant Adenoma,Malignant Adenomas,Oxyphilic Adenocarcinoma,Oxyphilic Adenocarcinomas,Tubular Adenocarcinoma,Tubular Adenocarcinomas,Tubular Carcinoma,Tubular Carcinomas
D012333 RNA, Messenger RNA sequences that serve as templates for protein synthesis. Bacterial mRNAs are generally primary transcripts in that they do not require post-transcriptional processing. Eukaryotic mRNA is synthesized in the nucleus and must be exported to the cytoplasm for translation. Most eukaryotic mRNAs have a sequence of polyadenylic acid at the 3' end, referred to as the poly(A) tail. The function of this tail is not known for certain, but it may play a role in the export of mature mRNA from the nucleus as well as in helping stabilize some mRNA molecules by retarding their degradation in the cytoplasm. Messenger RNA,Messenger RNA, Polyadenylated,Poly(A) Tail,Poly(A)+ RNA,Poly(A)+ mRNA,RNA, Messenger, Polyadenylated,RNA, Polyadenylated,mRNA,mRNA, Non-Polyadenylated,mRNA, Polyadenylated,Non-Polyadenylated mRNA,Poly(A) RNA,Polyadenylated mRNA,Non Polyadenylated mRNA,Polyadenylated Messenger RNA,Polyadenylated RNA,RNA, Polyadenylated Messenger,mRNA, Non Polyadenylated
D014162 Transfection The uptake of naked or purified DNA by CELLS, usually meaning the process as it occurs in eukaryotic cells. It is analogous to bacterial transformation (TRANSFORMATION, BACTERIAL) and both are routinely employed in GENE TRANSFER TECHNIQUES. Transfections
D015398 Signal Transduction The intracellular transfer of information (biological activation/inhibition) through a signal pathway. In each signal transduction system, an activation/inhibition signal from a biologically active molecule (hormone, neurotransmitter) is mediated via the coupling of a receptor/enzyme to a second messenger system or to an ion channel. Signal transduction plays an important role in activating cellular functions, cell differentiation, and cell proliferation. Examples of signal transduction systems are the GAMMA-AMINOBUTYRIC ACID-postsynaptic receptor-calcium ion channel system, the receptor-mediated T-cell activation pathway, and the receptor-mediated activation of phospholipases. Those coupled to membrane depolarization or intracellular release of calcium include the receptor-mediated activation of cytotoxic functions in granulocytes and the synaptic potentiation of protein kinase activation. Some signal transduction pathways may be part of larger signal transduction pathways; for example, protein kinase activation is part of the platelet activation signal pathway. Cell Signaling,Receptor-Mediated Signal Transduction,Signal Pathways,Receptor Mediated Signal Transduction,Signal Transduction Pathways,Signal Transduction Systems,Pathway, Signal,Pathway, Signal Transduction,Pathways, Signal,Pathways, Signal Transduction,Receptor-Mediated Signal Transductions,Signal Pathway,Signal Transduction Pathway,Signal Transduction System,Signal Transduction, Receptor-Mediated,Signal Transductions,Signal Transductions, Receptor-Mediated,System, Signal Transduction,Systems, Signal Transduction,Transduction, Signal,Transductions, Signal
D015972 Gene Expression Regulation, Neoplastic Any of the processes by which nuclear, cytoplasmic, or intercellular factors influence the differential control of gene action in neoplastic tissue. Neoplastic Gene Expression Regulation,Regulation of Gene Expression, Neoplastic,Regulation, Gene Expression, Neoplastic
D045744 Cell Line, Tumor A cell line derived from cultured tumor cells. Tumor Cell Line,Cell Lines, Tumor,Line, Tumor Cell,Lines, Tumor Cell,Tumor Cell Lines

Related Publications

Matthias B Stope, and Tina Schubert, and Doreen Staar, and Cindy Rönnau, and Andreas Streitbörger, and Nils Kroeger, and Constanze Kubisch, and Uwe Zimmermann, and Reinhard Walther, and Martin Burchardt
September 2017, Cancer science,
Matthias B Stope, and Tina Schubert, and Doreen Staar, and Cindy Rönnau, and Andreas Streitbörger, and Nils Kroeger, and Constanze Kubisch, and Uwe Zimmermann, and Reinhard Walther, and Martin Burchardt
December 2009, Oncogene,
Matthias B Stope, and Tina Schubert, and Doreen Staar, and Cindy Rönnau, and Andreas Streitbörger, and Nils Kroeger, and Constanze Kubisch, and Uwe Zimmermann, and Reinhard Walther, and Martin Burchardt
January 2012, International journal of clinical pharmacology and therapeutics,
Matthias B Stope, and Tina Schubert, and Doreen Staar, and Cindy Rönnau, and Andreas Streitbörger, and Nils Kroeger, and Constanze Kubisch, and Uwe Zimmermann, and Reinhard Walther, and Martin Burchardt
October 2014, Zhongguo yi xue ke xue yuan xue bao. Acta Academiae Medicinae Sinicae,
Matthias B Stope, and Tina Schubert, and Doreen Staar, and Cindy Rönnau, and Andreas Streitbörger, and Nils Kroeger, and Constanze Kubisch, and Uwe Zimmermann, and Reinhard Walther, and Martin Burchardt
February 2010, International journal of oncology,
Matthias B Stope, and Tina Schubert, and Doreen Staar, and Cindy Rönnau, and Andreas Streitbörger, and Nils Kroeger, and Constanze Kubisch, and Uwe Zimmermann, and Reinhard Walther, and Martin Burchardt
December 1995, Clinical cancer research : an official journal of the American Association for Cancer Research,
Matthias B Stope, and Tina Schubert, and Doreen Staar, and Cindy Rönnau, and Andreas Streitbörger, and Nils Kroeger, and Constanze Kubisch, and Uwe Zimmermann, and Reinhard Walther, and Martin Burchardt
October 2019, Journal of cellular biochemistry,
Matthias B Stope, and Tina Schubert, and Doreen Staar, and Cindy Rönnau, and Andreas Streitbörger, and Nils Kroeger, and Constanze Kubisch, and Uwe Zimmermann, and Reinhard Walther, and Martin Burchardt
October 2019, World journal of urology,
Matthias B Stope, and Tina Schubert, and Doreen Staar, and Cindy Rönnau, and Andreas Streitbörger, and Nils Kroeger, and Constanze Kubisch, and Uwe Zimmermann, and Reinhard Walther, and Martin Burchardt
January 2020, Journal of cellular biochemistry,
Matthias B Stope, and Tina Schubert, and Doreen Staar, and Cindy Rönnau, and Andreas Streitbörger, and Nils Kroeger, and Constanze Kubisch, and Uwe Zimmermann, and Reinhard Walther, and Martin Burchardt
September 2000, The Prostate,
Copied contents to your clipboard!