Androgen regulation of the androgen receptor coregulators

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dc.contributor.author Urbanucci, Alfonso -
dc.contributor.author Waltering, Kati K -
dc.contributor.author Suikki, Hanna E -
dc.contributor.author Helenius, Merja A -
dc.contributor.author Visakorpi, Tapio -
dc.date.accessioned 2012-06-17T20:13:48Z
dc.date.available 2012-06-15 07:11:37 -
dc.date.available 2012-06-17T20:13:48Z
dc.date.issued 2008 -
dc.identifier.issn 1471-2407 -
dc.identifier.uri http://tampub.uta.fi/handle/10024/65804
dc.description BioMed Central Open access -
dc.description.abstract Background The critical role of the androgen receptor (AR) in the development of prostate cancer is well recognized. The transcriptional activity of AR is partly regulated by coregulatory proteins. It has been suggested that these coregulators could also be important in the progression of prostate cancer. The aim of this study was to identify coregulators whose expression is regulated by either the androgens and/or by the expression level of AR. Methods We used empty vector and AR cDNA-transfected LNCaP cells (LNCaP-pcDNA3.1, and LNCaP-ARhi, respectively), and grew them for 4 and 24 hours in the presence of dihydrotestosterone (DHT) at various concentrations. The expression of 25 AR coregulators (SRC1, TIF2, PIAS1, PIASx, ARIP4, BRCA1, β-catenin, AIB3, AIB1, CBP, STAT1, NCoR1, AES, cyclin D1, p300, ARA24, LSD1, BAG1L, gelsolin, prohibitin, JMJD2C, JMJD1A, MAK, PAK6 and MAGE11) was then measured by using real-time quantitative RT-PCR (Q-RT-PCR). Results Five of the coregulators (AIB1, CBP, MAK, BRCA1 and β-catenin) showed more than 2-fold induction and 5 others (cyclin D1, gelsolin, prohibitin, JMJD1A, and JMJD2C) less than 2-fold induction. Overexpression of AR did not affect the expression of the coregulators alone. However, overexpression of AR enhanced the DHT-stimulated expression of MAK, BRCA1, AIB1 and CBP and reduced the level of expression of β-catenin, cyclinD1 and gelsolin. Conclusion In conclusion, we identified 5 coactivators whose expression was induced by androgens suggesting that they could potentiate AR signaling. Overexpression of AR seems to sensitize cells for low levels of androgens. -
dc.language.iso en -
dc.title Androgen regulation of the androgen receptor coregulators -
dc.type fi=Artikkeli aikakauslehdessä | en=Journal article| -
dc.identifier.urn urn:nbn:uta-3-569 -
dc.identifier.doi 10.1186/1471-2407-8-219 -
dc.type.version fi=Kustantajan versio | en=Publisher's version| -
dc.subject.okm fi=Biolääketieteet | en=Biomedicine| -
dc.journal.title BMC Cancer -
dc.journal.volume 8 -
dc.journal.number 219 -
dc.journal.volumepagerange 1-10 -
dc.oldstats 71 -

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