Expression of the transient receptor potential vanilloid 1 (TRPV1) in LNCaP and PC-3 prostate cancer cells and in human prostate tissue.
Vanilloid receptor subtype-1 (TRPV1), the founding member of the vanilloid receptor-like transient receptor potential channel family, is a non-selective cation channel that responds to noxious stimuli such as low pH, painful heat and irritants. In the present study, we show, as means of reverse transcriptase-polymerase chain reaction and Western blot analysis, that the vanilloid TRPV1 receptor is expressed in the prostate epithelial cell lines PC-3 and LNCaP as well as in human prostate tissue. The kinetic parameters inferred from [(125)I]-resiniferatoxin binding were in concordance with data of TRPV1 receptors expressed in other tissues. The contribution of the endogenously expressed TRPV1 channel to intracellular calcium concentration increase in the prostate cells was studied by measuring changes in Fura-2 fluorescence by fluorescence microscopy. Addition of capsaicin, (R)-methanandamide and resiniferatoxin to prostate cells induced a dose-dependent increase in the intracellular calcium concentration that was reversed by the vanilloid TRPV1 receptor antagonist capsazepine. These results indicate that the vanilloid TRPV1 receptor is expressed and functionally active in human prostate cells.
Sanchez
Maria G
MG
Department of Biochemistry and Molecular Biology, School of Medicine, University of Alcala, Alcala de Henares, 28871 Madrid, Spain.
Sanchez
Ana M
AM
Collado
Beatriz
B
Malagarie-Cazenave
Sophie
S
Olea
Nuria
N
Carmena
Maria J
MJ
Prieto
Juan C
JC
Diaz-Laviada I
Ines
I
D001095:Arachidonic Acids / Q000378:metabolism / Q000494:pharmacology; D001667:Binding, Competitive / Q000187:drug effects; D015153:Blotting, Western; D002118:Calcium / Q000378:metabolism; D002211:Capsaicin / Q000378:metabolism / Q000494:pharmacology; D045744:Cell Line, Tumor; D004224:Diterpenes / Q000378:metabolism; D004305:Dose-Response Relationship, Drug; D015870:Gene Expression / Q000235:genetics*; D006801:Humans; D007457:Iodine Radioisotopes; D007473:Ion Channels / Q000819:agonists / Q000235:genetics* / Q000378:metabolism; D008297:Male; D011467:Prostate / Q000378:metabolism*; D011471:Prostatic Neoplasms / Q000235:genetics / Q000378:metabolism / Q000473:pathology; D011869:Radioligand Assay; D020133:Reverse Transcriptase Polymerase Chain Reaction; D050916:TRPV Cation Channels
D001095:Arachidonic Acids; D004224:Diterpenes; D007457:Iodine Radioisotopes; D007473:Ion Channels; D050916:TRPV Cation Channels; C494482:TRPV1 protein, human; C088155:methanandamide; C024353:resiniferatoxin; D002211:Capsaicin; D002118:Calcium