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Expression of serotonin receptors 2B and 4 in human prostate cancer tissue and effects of their antagonists on prostate cancer cell lines.
Department of Urology, Malmö University Hospital, Lund University, Malmö, Sweden.
Department of Urology, Malmö University Hospital, Lund University, Malmö, Sweden.
Department of Clinical Pharmacology, Malmö University Hospital, Lund University, Malmö, Sweden.
Oslo Urological University Clinic, Aker University Hospital, Faculty Division Aker University Hospital, University of Oslo, Oslo, Norwaytal, Faculty Division Aker University Hospital, University of Oslo.
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2005 (English)In: European Urology, ISSN 0302-2838, E-ISSN 1873-7560, Vol. 47, no 6, 895-900 p.Article in journal (Refereed) Published
Abstract [en]

OBJECTIVES: Overexpression of receptors to neuroendocrine (NE) cell products has been suggested to contribute to development of hormone-refractory prostate cancer (HRPC). In this study, we evaluated the expression of 5-HTR2B and 5-HTR4 in HRPC, and the effects of their antagonist on PC cell line growth.

METHODS: Proteins and mRNA expression was determined by immunohistochemistry, western blot and RT-PCR. Growth inhibition of PC cell lines was determined in vitro using ELISA-BrdU proliferation assay and cell cycle was evaluated by flow cytometry.

RESULTS: Immunostaining of 5-HTR2B was observed in low-grade and high-grade tumours, PIN and BPH cells, and in vascular endothelial cells, whereas 5-HTR4 was found predominantly in high-grade tumours. This result was confirmed by western blot analysis. At the mRNA level, 5-HTR4 mRNA was expressed in DU145 and LNCaP cells. Antagonists to both receptor subtypes inhibited proliferation of PC cells in a dose-dependent manner.

CONCLUSIONS: The present result indicate that 5-HTRs are present at various tumour stages and that antagonists to these receptors can inhibit the proliferative activity of androgen-independent PC cell lines.

Place, publisher, year, edition, pages
2005. Vol. 47, no 6, 895-900 p.
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Medical and Health Sciences
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URN: urn:nbn:se:liu:diva-77642DOI: 10.1016/j.eururo.2005.02.006PubMedID: 15925089OAI: oai:DiVA.org:liu-77642DiVA: diva2:528170
Available from: 2012-05-24 Created: 2012-05-24 Last updated: 2017-12-07

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Hedlund, Petter

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