Insulin-Like Growth Factor (IGF) System Components in Human Prostatic Cancer Cell-Lines: LNCaP, DU145, and PC-3 Cells

Background: Evidence has been accumulating that in many tumors, insulin‐like growth factors (ICFs) promote cancer cell growth in an autocrine/paracrine manner via the IGF‐1 receptor. In an effort to understand the role of ICFs in prostate cancer cell growth, we characterized the IGF system component...

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Veröffentlicht in:International journal of urology 1996-01, Vol.3 (1), p.39-46
Hauptverfasser: Kimura, Go, Kasuya, Junko, Giannini, Stefano, Honda, Yoko, Mohan, Subburaman, Kawachi, Mark H., Akimoto, Masato, Fujita-Yamaguchi, Yoko
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container_end_page 46
container_issue 1
container_start_page 39
container_title International journal of urology
container_volume 3
creator Kimura, Go
Kasuya, Junko
Giannini, Stefano
Honda, Yoko
Mohan, Subburaman
Kawachi, Mark H.
Akimoto, Masato
Fujita-Yamaguchi, Yoko
description Background: Evidence has been accumulating that in many tumors, insulin‐like growth factors (ICFs) promote cancer cell growth in an autocrine/paracrine manner via the IGF‐1 receptor. In an effort to understand the role of ICFs in prostate cancer cell growth, we characterized the IGF system components produced by human prostatic cancer cell‐lines, LNCaP, DU145, and PC‐3, grown in serum‐free medium. Methods: IGFs, their receptors, and IGF binding proteins (IGFBPs) produced by the three human prostate cell lines were characterized by reverse transcriptase‐polymerase chain reaction (RT‐PCR), radioimmunoassay (RIA), Western ligand blot, Western immunoblot, and Northern blot analyses. Results: mRNA for IGF‐II and receptors for IGF‐I and IGF‐II were detected in all three cell‐lines by RT‐PCR. In contrast to the published study, only LNCaP cells expressed a trace amount of IGF‐I mRNA. RIA on conditioned media collected from these cells revealed that all three cell‐lines produced measurable IGF‐II but not IGF‐I. Western ligand blot, Western immunoblot, and Northern blot analyses revealed that LNCaP, DU145, and PC‐3 cells expressed IGFBP‐2, IGFBP‐2/‐3/‐4/‐6, and IGFBP‐2/‐3/‐4/‐5/‐6, respectively. IGF‐II stimulated [3H]thymidine incorporation into DNA in DU145 and PC‐3 cells significantly although the effect was small. DNA synthesis in PC‐3 cells but not in LNCaP and DU145 cells was significantly inhibited by the IGF‐I receptor‐specific monoclonal antibody. Conclusion: These results suggest potentially important roles of IGFs and IGFBPs in prostate cancer cell growth, and that in particular, IGF‐II may play a critical role in prostate cancer cell growth.
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In an effort to understand the role of ICFs in prostate cancer cell growth, we characterized the IGF system components produced by human prostatic cancer cell‐lines, LNCaP, DU145, and PC‐3, grown in serum‐free medium. Methods: IGFs, their receptors, and IGF binding proteins (IGFBPs) produced by the three human prostate cell lines were characterized by reverse transcriptase‐polymerase chain reaction (RT‐PCR), radioimmunoassay (RIA), Western ligand blot, Western immunoblot, and Northern blot analyses. Results: mRNA for IGF‐II and receptors for IGF‐I and IGF‐II were detected in all three cell‐lines by RT‐PCR. In contrast to the published study, only LNCaP cells expressed a trace amount of IGF‐I mRNA. RIA on conditioned media collected from these cells revealed that all three cell‐lines produced measurable IGF‐II but not IGF‐I. Western ligand blot, Western immunoblot, and Northern blot analyses revealed that LNCaP, DU145, and PC‐3 cells expressed IGFBP‐2, IGFBP‐2/‐3/‐4/‐6, and IGFBP‐2/‐3/‐4/‐5/‐6, respectively. IGF‐II stimulated [3H]thymidine incorporation into DNA in DU145 and PC‐3 cells significantly although the effect was small. DNA synthesis in PC‐3 cells but not in LNCaP and DU145 cells was significantly inhibited by the IGF‐I receptor‐specific monoclonal antibody. 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In an effort to understand the role of ICFs in prostate cancer cell growth, we characterized the IGF system components produced by human prostatic cancer cell‐lines, LNCaP, DU145, and PC‐3, grown in serum‐free medium. Methods: IGFs, their receptors, and IGF binding proteins (IGFBPs) produced by the three human prostate cell lines were characterized by reverse transcriptase‐polymerase chain reaction (RT‐PCR), radioimmunoassay (RIA), Western ligand blot, Western immunoblot, and Northern blot analyses. Results: mRNA for IGF‐II and receptors for IGF‐I and IGF‐II were detected in all three cell‐lines by RT‐PCR. In contrast to the published study, only LNCaP cells expressed a trace amount of IGF‐I mRNA. RIA on conditioned media collected from these cells revealed that all three cell‐lines produced measurable IGF‐II but not IGF‐I. Western ligand blot, Western immunoblot, and Northern blot analyses revealed that LNCaP, DU145, and PC‐3 cells expressed IGFBP‐2, IGFBP‐2/‐3/‐4/‐6, and IGFBP‐2/‐3/‐4/‐5/‐6, respectively. IGF‐II stimulated [3H]thymidine incorporation into DNA in DU145 and PC‐3 cells significantly although the effect was small. DNA synthesis in PC‐3 cells but not in LNCaP and DU145 cells was significantly inhibited by the IGF‐I receptor‐specific monoclonal antibody. 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Kasuya, Junko ; Giannini, Stefano ; Honda, Yoko ; Mohan, Subburaman ; Kawachi, Mark H. ; Akimoto, Masato ; Fujita-Yamaguchi, Yoko</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c4698-b60e21af9f90ba08ca0158d0dc6a9744931077a4eaa0ba9077effad2d83b10fa3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1996</creationdate><topic>Antibodies, Monoclonal</topic><topic>Base Sequence</topic><topic>Blotting, Northern</topic><topic>Cell Division - drug effects</topic><topic>Cell Division - immunology</topic><topic>cell growth</topic><topic>Culture Media, Conditioned - chemistry</topic><topic>Humans</topic><topic>IGF-I receptor monoclonal antibody</topic><topic>IGFBPs</topic><topic>IGFs</topic><topic>Insulin-Like Growth Factor Binding Protein 3 - analysis</topic><topic>Insulin-Like Growth Factor Binding Protein 3 - genetics</topic><topic>Insulin-Like Growth Factor Binding Protein 4 - genetics</topic><topic>Insulin-Like Growth Factor Binding Protein 4 - metabolism</topic><topic>Insulin-Like Growth Factor Binding Protein 5 - genetics</topic><topic>Insulin-Like Growth Factor Binding Protein 5 - metabolism</topic><topic>Insulin-Like Growth Factor Binding Protein 6 - genetics</topic><topic>Insulin-Like Growth Factor Binding Protein 6 - metabolism</topic><topic>Insulin-Like Growth Factor Binding Proteins - analysis</topic><topic>Insulin-Like Growth Factor Binding Proteins - genetics</topic><topic>Insulin-Like Growth Factor Binding Proteins - secretion</topic><topic>Insulin-Like Growth Factor I - analysis</topic><topic>Insulin-Like Growth Factor I - genetics</topic><topic>Insulin-Like Growth Factor II - analysis</topic><topic>Insulin-Like Growth Factor II - genetics</topic><topic>Insulin-Like Growth Factor II - pharmacology</topic><topic>Male</topic><topic>Molecular Sequence Data</topic><topic>prostate cancer cells</topic><topic>Prostatic Neoplasms</topic><topic>Receptor, IGF Type 1 - analysis</topic><topic>Receptor, IGF Type 1 - genetics</topic><topic>Receptor, IGF Type 1 - metabolism</topic><topic>Receptor, IGF Type 2 - analysis</topic><topic>Receptor, IGF Type 2 - genetics</topic><topic>Receptor, IGF Type 2 - metabolism</topic><topic>RNA, Messenger - analysis</topic><topic>Tumor Cells, Cultured - chemistry</topic><topic>Tumor Cells, Cultured - cytology</topic><topic>Tumor Cells, Cultured - physiology</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Kimura, Go</creatorcontrib><creatorcontrib>Kasuya, Junko</creatorcontrib><creatorcontrib>Giannini, Stefano</creatorcontrib><creatorcontrib>Honda, Yoko</creatorcontrib><creatorcontrib>Mohan, Subburaman</creatorcontrib><creatorcontrib>Kawachi, Mark H.</creatorcontrib><creatorcontrib>Akimoto, Masato</creatorcontrib><creatorcontrib>Fujita-Yamaguchi, Yoko</creatorcontrib><collection>Istex</collection><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>MEDLINE - Academic</collection><jtitle>International journal of urology</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Kimura, Go</au><au>Kasuya, Junko</au><au>Giannini, Stefano</au><au>Honda, Yoko</au><au>Mohan, Subburaman</au><au>Kawachi, Mark H.</au><au>Akimoto, Masato</au><au>Fujita-Yamaguchi, Yoko</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Insulin-Like Growth Factor (IGF) System Components in Human Prostatic Cancer Cell-Lines: LNCaP, DU145, and PC-3 Cells</atitle><jtitle>International journal of urology</jtitle><addtitle>Int J Urol</addtitle><date>1996-01</date><risdate>1996</risdate><volume>3</volume><issue>1</issue><spage>39</spage><epage>46</epage><pages>39-46</pages><issn>0919-8172</issn><eissn>1442-2042</eissn><abstract>Background: Evidence has been accumulating that in many tumors, insulin‐like growth factors (ICFs) promote cancer cell growth in an autocrine/paracrine manner via the IGF‐1 receptor. In an effort to understand the role of ICFs in prostate cancer cell growth, we characterized the IGF system components produced by human prostatic cancer cell‐lines, LNCaP, DU145, and PC‐3, grown in serum‐free medium. Methods: IGFs, their receptors, and IGF binding proteins (IGFBPs) produced by the three human prostate cell lines were characterized by reverse transcriptase‐polymerase chain reaction (RT‐PCR), radioimmunoassay (RIA), Western ligand blot, Western immunoblot, and Northern blot analyses. Results: mRNA for IGF‐II and receptors for IGF‐I and IGF‐II were detected in all three cell‐lines by RT‐PCR. In contrast to the published study, only LNCaP cells expressed a trace amount of IGF‐I mRNA. RIA on conditioned media collected from these cells revealed that all three cell‐lines produced measurable IGF‐II but not IGF‐I. Western ligand blot, Western immunoblot, and Northern blot analyses revealed that LNCaP, DU145, and PC‐3 cells expressed IGFBP‐2, IGFBP‐2/‐3/‐4/‐6, and IGFBP‐2/‐3/‐4/‐5/‐6, respectively. IGF‐II stimulated [3H]thymidine incorporation into DNA in DU145 and PC‐3 cells significantly although the effect was small. DNA synthesis in PC‐3 cells but not in LNCaP and DU145 cells was significantly inhibited by the IGF‐I receptor‐specific monoclonal antibody. Conclusion: These results suggest potentially important roles of IGFs and IGFBPs in prostate cancer cell growth, and that in particular, IGF‐II may play a critical role in prostate cancer cell growth.</abstract><cop>Oxford, UK</cop><pub>Blackwell Publishing Ltd</pub><pmid>8646598</pmid><doi>10.1111/j.1442-2042.1996.tb00628.x</doi><tpages>8</tpages><oa>free_for_read</oa></addata></record>
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identifier ISSN: 0919-8172
ispartof International journal of urology, 1996-01, Vol.3 (1), p.39-46
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subjects Antibodies, Monoclonal
Base Sequence
Blotting, Northern
Cell Division - drug effects
Cell Division - immunology
cell growth
Culture Media, Conditioned - chemistry
Humans
IGF-I receptor monoclonal antibody
IGFBPs
IGFs
Insulin-Like Growth Factor Binding Protein 3 - analysis
Insulin-Like Growth Factor Binding Protein 3 - genetics
Insulin-Like Growth Factor Binding Protein 4 - genetics
Insulin-Like Growth Factor Binding Protein 4 - metabolism
Insulin-Like Growth Factor Binding Protein 5 - genetics
Insulin-Like Growth Factor Binding Protein 5 - metabolism
Insulin-Like Growth Factor Binding Protein 6 - genetics
Insulin-Like Growth Factor Binding Protein 6 - metabolism
Insulin-Like Growth Factor Binding Proteins - analysis
Insulin-Like Growth Factor Binding Proteins - genetics
Insulin-Like Growth Factor Binding Proteins - secretion
Insulin-Like Growth Factor I - analysis
Insulin-Like Growth Factor I - genetics
Insulin-Like Growth Factor II - analysis
Insulin-Like Growth Factor II - genetics
Insulin-Like Growth Factor II - pharmacology
Male
Molecular Sequence Data
prostate cancer cells
Prostatic Neoplasms
Receptor, IGF Type 1 - analysis
Receptor, IGF Type 1 - genetics
Receptor, IGF Type 1 - metabolism
Receptor, IGF Type 2 - analysis
Receptor, IGF Type 2 - genetics
Receptor, IGF Type 2 - metabolism
RNA, Messenger - analysis
Tumor Cells, Cultured - chemistry
Tumor Cells, Cultured - cytology
Tumor Cells, Cultured - physiology
title Insulin-Like Growth Factor (IGF) System Components in Human Prostatic Cancer Cell-Lines: LNCaP, DU145, and PC-3 Cells
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