Abstract
The effects of expression of Drosophila melanoga ster Ca2+ permeable transient receptor potential-like (TRPL) channels, under the control of the cytomegalovirus (CMV) or prostate cell-specific promoters, on cell survival and apoptosis in the androgen-sensitive LNCaP prostate cancer cell line were investigated. A prostate-specific antigen (PSA) promoter construct (designated PSAEn/PSAPr) composed of a 0.6 kb region of the promoter and a 1.45 kb region of the enhancer resulted in androgen-dependent and prostate-specific expression of a luciferase reporter gene in transiently transfected LNCaP cells. Expression of the enhanced green fluorescence protein-TRPL chimeric protein under the control of the CMV promoter was confirmed by Western blot. Whereas the majority of the expressed protein was located in the cytoplasmic space, confocal microscopy with the CD-9 protein as a plasma membrane marker demonstrated that approximately 10% of the expressed TRPL protein was located in a band in the plasma membrane. Using recombinant adenoviruses, expression of the TRPL protein was associated with an increase in both the initial and sustained rates of Ca2+ inflow. Expression of TRPL under the control of the CMV promoter for 96 hours decreased cell number and increased the number of cells undergoing apoptosis by 23 and 27%, respectively. Apoptosis was inhibited by a caspase-3 inhibitor, Z-DEVD-fmk. It is concluded that, when heterologously expressed in LNCaP cells, the TRPL protein leads to a reduction in cell survival due, in part, to the induction of apoptosis. The effects of TRPL are likely caused by enhanced Na+ and Ca2+ inflow to the cells. This finding suggests a novel approach to modify the growth of prostate cancer cells that fail to undergo apoptosis following androgen ablation therapy.
This is a preview of subscription content, access via your institution
Access options
Subscribe to this journal
Receive 12 print issues and online access
$259.00 per year
only $21.58 per issue
Buy this article
- Purchase on SpringerLink
- Instant access to the full article PDF.
USD 39.95
Prices may be subject to local taxes which are calculated during checkout







Similar content being viewed by others
References
Scher HI, Steineck G, Kelly WK . Hormone-refractory (D3) prostate cancer: refining the concept. Urology. 1995;46:142–148.
Isaacs JT, Lundmo PI, Berges R, et al. Androgen regulation of programmed death of normal and malignant prostatic cells. J Androl. 1992;13:457–464.
Gschwend JE . Apoptosis — principles and importance of programmed cell death for prostatic carcinoma. Urologe A. 1996;35:390–399.
Denmeade SR, Isaacs JT . Activation of programmed (apoptotic) cell death for the treatment of prostate cancer. Adv Pharmacol. 1996;35:281–306.
Gutierrez AA, Arias JM, Garcia L, et al. Activation of a Ca2+-permeable cation channel by two different inducers of apoptosis in a human prostatic cancer cell line. J Physiol. 1999;517:95–107.
Furuya Y, Lundmo P, Short AD, et al. The role of calcium, pH, and cell proliferation in the programmed (apoptotic) death of androgen-independent prostatic cancer cells induced by thapsigargin. Cancer Res. 1994;54: 6167–6175.
Kyprianou NEHF, Isaacs JT . Activation of a Ca2+–Mg2+-dependent endonuclease as an early event in castration-induced prostatic cell death. Prostate. 1998;13:103–117.
Thastrup O, Cullen PJ, Drobak BK, et al. Thapsigargin, a tumor promoter, discharges intracellular Ca2+ stores by specific inhibition of the endoplasmic reticulum Ca2(+)-ATPase. Proc Natl Acad Sci USA. 1990;87:2466–2470.
Skryma R, Mariot P, Bourhis XL, et al. Store depletion and store-operated Ca2+ current in human prostate cancer LNCaP cells: involvement in apoptosis. J Physiol. 2000; 527(Part 1): 71–83.
Marcelli M, Cunningham GR, Haidacher SJ, et al. Caspase-7 is activated during lovastatin-induced apoptosis of the prostate cancer cell line LNCaP. Cancer Res. 1998;58:76–83.
Lin XS, Denmeade SR, Cisek L, et al. Mechanism and role of growth arrest in programmed (apoptotic) death of prostatic cancer cells induced by thapsigargin. Prostate. 1997;33:201–207.
Martikainen P, Isaacs JT . Role of calcium in the programmed death of rat prostatic glandular cells. Prostate. 1990;17:175–187.
Phillips AM, Bull A, Kelly LE . Identification of a Drosophila gene encoding a calmodulin-binding protein with homology to the trp phototransduction gene. Neuron. 1992;8:631–642.
Clapham DE, Runnels LW, Strubing C . The TRP ion channel family. Nat Rev Neurosci. 2001;2:387–396.
Lan L, Bawden MJ, Auld AM, et al. Expression of Drosophila trp1 cRNA in Xenopus laevis oocytes leads to the appearance of a Ca2+ channel activated by Ca2+ and calmodulin, and by guanosine 5′[gamma-thio]triphosphate. Biochem J. 1996;316:793–803.
Gillo B, Chorna I, Cohen H, et al. Coexpression of Drosophila TRP and TRP-like proteins in Xenopus oocytes reconstitutes capacitative Ca2+ entry. Proc Natl Acad Sci USA. 1996;93:14146–14151.
Zimmer S, Trost C, Wissenbach U, et al. Modulation of recombinant transient-receptor-potential-like (TRPL) channels by cytosolic Ca2+. Pflugers Arch. 2000;440:409–417.
Westfall MV, Rust EM, Albaya F, et al. Adenovirus-mediated myofilament gene transfer into adult cardiac myocytes. Meth Cell Biol. 1997;52:307–322.
Thomsen DR, Stenberg RM, Goins WF, et al. Promoter-regulatory region of the major immediate early gene of human cytomegalovirus. Proc Natl Acad Sci USA. 1984;81:659–663.
He TC, Zhou S, da Costa LT, et al. A simplified system for generating recombinant adenoviruses. Proc Natl Acad Sci USA. 1998;95:2509–2514.
Niemeyer BA, Suzuki E, Scott K, et al. The Drosophila light-activated conductance is composed of the two channels TRP and TRPL. Cell. 1996;85:651–659.
Harlow E, Lane D . Antibodies: A Laboratory Manual. New York: Cold Spring Harbor Laboratories; 1988;313–315.
Xu HJ, Umapathysivam K, McNeilage J, et al. An enhanced chemiluminescence detection system combined with a modified immunoblot technique for the detection of low molecular weight IgM in sera from healthy adults and neonates. J Immunol Methods. 1992;146:241–247.
Imamura N, Mtasiwa DM, Ota H, et al. Distribution of cell surface glycoprotein CD9 (P24) antigen on megakaryocyte lineage leukemias and cell lines. Am J Hematol. 1990;35:65–67.
Grzegorz G, Poenie M, Tsien RY . A new generation of Ca2+ indicators with greatly improved fluorescence properties. J Biol Chem. 1985;260:3440–3450.
Park JG, Kramer BS, Steinberg SM, et al. Chemosensitivity testing of human colorectal carcinoma cell lines using a tetrazolium-based colorimetric assay. Cancer Res. 1987;47:5875–5879.
Ferguson DJ, Anderson TJ . Ultrastructural observations on cell death by apoptosis in the “resting” human breast. Virch Arch A Pathol Anat Histol. 1981;393:193–203.
Yanagihara K, Tsumuraya M . Transforming growth factor beta 1 induces apoptotic cell death in cultured human gastric carcinoma cells. Cancer Res. 1992;52:4042–4045.
Pang S, Taneja S, Dardashti K, et al. Prostate tissue specificity of the prostate-specific antigen promoter isolated from a patient with prostate cancer. Hum Gene Ther. 1995;6:1417–1426.
Schuur ER, Henderson GA, Kmetec LA, et al. Prostate-specific antigen expression is regulated by an upstream enhancer. J Biol Chem. 1996;271:7043–7051.
Rennie PS, Bruchovsky N, Leco KJ, et al. Characterization of two cis-acting DNA elements involved in the androgen regulation of the probasin gene. Mol Endocrinol. 1993;7:23–36.
Tilley WD, Bentel JM, Aspinall JO, et al. Evidence for a novel mechanism of androgen resistance in the human prostate cancer cell line, PC-3. Steroids. 1995; 60:180–186.
Uchida S, Shimada Y, Watanabe G, et al. Motility-related protein (MRP-1/CD9) and KAI1/CD82 expression inversely correlate with lymph node metastasis in oesophageal squamous cell carcinoma. Br J Cancer. 1999;79:1168–1173.
Chalfie M, Tu Y, Euskirchen G, et al. Green fluorescent protein as a marker for gene expression. Science. 1994;263:802–805.
Strasser A, O'Connor L, Dixit VM . Apoptosis signaling. Ann Rev Biochem. 2000;69:217–245.
Coffey RN, Watson RW, Fitzpatrick JM . Signaling for the caspases: their role in prostate cell apoptosis. J Urol. 2001;165:5–14.
Cohen GM . Caspases: the executioners of apoptosis. Biochem J. 1997;326:1–16.
Alnemri ES, Livingston DJ, Nicholson DW, et al. Human ICE/CED-3 protease nomenclature. Cell. 1996;87:171.
Pastorino JG, Chen ST, Tafani M, et al. The overexpression of Bax produces cell death upon induction of the mitochondrial permeability transition. J Biol Chem. 1998;273:7770–7775.
Juin P, Pelletier M, Oliver L, et al. Induction of a caspase-3-like activity by calcium in normal cytosolic extracts triggers nuclear apoptosis in a cell-free system. J Biol Chem. 1998;273:17559–17564.
Reuss H, Mojet MH, Chyb S, et al. In vivo analysis of the Drosophila light-sensitive channels, TRP and TRPL. Neuron. 1997;19:1249–1259.
Gomez-Angelats M, Bortner CD, Cidlowski JA . Cell volume regulation in immune cell apoptosis. Cell Tissue Res. 2000;301:33–42.
Bortner CD, Cidlowski JA . Flow cytometric analysis of cell shrinkage and monovalent ions during apoptosis. Meths Cell Biol. 2001;66:49–67.
Latham JP, Searle PF, Mautner V, et al. Prostate-specific antigen promoter/enhancer driven gene therapy for prostate cancer: construction and testing of a tissue-specific adenovirus vector. Cancer Res. 2000;60:334–341.
Lee C, Sutkowski DM, Sensibar JA, et al. Regulation of proliferation and production of prostate-specific antigen in androgen-sensitive prostatic cancer cells, LNCaP, by dihydrotestosterone. Endocrinology. 1995;136:796–803.
Wang LG, Liu XM, Kreis W, et al. Phosphorylation/dephosphorylation of androgen receptor as a determinant of androgen agonistic or antagonistic activity. Biochem Biophys Res Commun. 1999;259:21–28.
Lan L, Brereton H, Barritt GJ . The role of calmodulin-binding sites in the regulation of the Drosophila TRPL cation channel expressed in Xenopus laevis oocytes by Ca2+, inositol 1,4,5-trisphosphate and GTP-binding proteins. Biochem J. 1998;330:1149–1158.
Bennett V, Lambert S, Davis JQ, et al. Molecular architecture of the specialized axonal membrane at the node of Ranvier. Soc Gen Physiol Ser. 1997;52:107–120.
Bourguignon LY, Chu A, Jin H, et al. Ryanodine receptor-ankyrin interaction regulates internal Ca2+ release in mouse T-lymphoma cells. J Biol Chem. 1995;270:17917–17922.
Bourguignon LY, Jin H, Ida N, et al. The involvement of ankyrin in regulation of inositol 1,4,5 trisphosphate receptor-mediated internal Ca2+ release from Ca2+ storage vehicles ion mouse T-lymphoma cells. J Biol Chem. 1993;268:7280–7297.
Drenckhahn D, Bennett V . Polarized distribution of Mr 210,000 and 190,000 analogs of erythrocyte ankyrin along the plasma membrane of transporting epithelia, neurons and photoreceptors. Eur J Cell Biol. 1987;43:479–486.
Bahri SM, Yang X, Chia W . The Drosophila biofocal gene encodes a novel protein which co-localizes with actin and is necessary for photoreceptor morphogenesis. Mol Cell Biol. 1997;17:5521–5529.
Welsh CF, Zhu D, Bourguigon LY . Interaction of CD44 variant isoforms with hyaluronic acid and the cytoskeleton in human prostate cancer cells. J Cell Physiol. 1995;164:605–612.
Horoszewicz JS, Leong SS, Chu TM, et al. The LNCaP cell line — a new model for studies on human prostatic carcinoma. Prog Clin Biol Res. 1980;37:115–132.
Wang W, O'Connell B, Dykeman R, et al. Cloning of TRP1 beta isoform from rat brain: immunodetection and localisation of the endogenous TRP1 protein. Am J Physiol 1999;276:C969–C979.
Bahner M, Frechter S, Silva ND, et al. Light-regulated subcellular translocation of Drosophila TRPL channels induces long-term adaptation and modifies the light-induced current. Neuron. 2002;34:83–93.
Acknowledgements
The authors are grateful to Mrs Diana Kassos for typing the manuscript, Ms Jenny Hiscock for assistance with the confocal microscopy, Mr Miao Yang for advice on prostate cell-specific promoters, the Anti-Cancer Foundation of the Universities of South Australia for grant support, and to the Australian Government for the provision of an International Postgraduate Research Scholarship to Lei Zhang.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Zhang, L., Brereton, H., Hahn, M. et al. Expression of Drosophila Ca2+ permeable transient receptor potential-like channel protein in a prostate cancer cell line decreases cell survival. Cancer Gene Ther 10, 611–625 (2003). https://doi.org/10.1038/sj.cgt.7700608
Received:
Published:
Issue date:
DOI: https://doi.org/10.1038/sj.cgt.7700608


