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Exosomes as Biomarker Enriched Microvesicles: Characterization of Exosomal Proteins Derived from a Panel of Prostate Cell Lines with Distinct AR Phenotypes
Prostate cancer is the leading type of cancer diagnosed in men. In 2010, ∼217,730 new cases of prostate cancer were reported in the United States. Prompt diagnosis of the disease can substantially improve its clinical outcome. Improving capability for early detection, as well as developing new thera...
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Published in: | Molecular & cellular proteomics 2012-10, Vol.11 (10), p.863-885 |
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description | Prostate cancer is the leading type of cancer diagnosed in men. In 2010, ∼217,730 new cases of prostate cancer were reported in the United States. Prompt diagnosis of the disease can substantially improve its clinical outcome. Improving capability for early detection, as well as developing new therapeutic targets in advanced disease are research priorities that will ultimately lead to better patient survival. Eukaryotic cells secrete proteins via distinct regulated mechanisms which are either ER/Golgi dependent or microvesicle mediated. The release of microvesicles has been shown to provide a novel mechanism for intercellular communication. Exosomes are nanometer sized cup-shaped membrane vesicles which are secreted from normal and cancerous cells. They are present in various biological fluids and are rich in characteristic proteins. Exosomes may thus have potential both in facilitating early diagnosis via less invasive procedures or be candidates for novel therapeutic approaches for castration resistance prostate cancer. Because exosomes have been shown previously to have a role in cell-cell communication in the local tumor microenvironment, conferring activation of numerous survival mechanisms, we characterized constitutive lipids, cholesterol and proteins from exosomes derived from six prostate cell lines and tracked their uptake in both cancerous and benign prostate cell lines respectively. Our comprehensive proteomic and lipidomic analysis of prostate derived exosomes could provide insight for future work on both biomarker and therapeutic targets for the treatment of prostate cancer. |
doi_str_mv | 10.1074/mcp.M111.014845 |
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In 2010, ∼217,730 new cases of prostate cancer were reported in the United States. Prompt diagnosis of the disease can substantially improve its clinical outcome. Improving capability for early detection, as well as developing new therapeutic targets in advanced disease are research priorities that will ultimately lead to better patient survival. Eukaryotic cells secrete proteins via distinct regulated mechanisms which are either ER/Golgi dependent or microvesicle mediated. The release of microvesicles has been shown to provide a novel mechanism for intercellular communication. Exosomes are nanometer sized cup-shaped membrane vesicles which are secreted from normal and cancerous cells. They are present in various biological fluids and are rich in characteristic proteins. Exosomes may thus have potential both in facilitating early diagnosis via less invasive procedures or be candidates for novel therapeutic approaches for castration resistance prostate cancer. Because exosomes have been shown previously to have a role in cell-cell communication in the local tumor microenvironment, conferring activation of numerous survival mechanisms, we characterized constitutive lipids, cholesterol and proteins from exosomes derived from six prostate cell lines and tracked their uptake in both cancerous and benign prostate cell lines respectively. Our comprehensive proteomic and lipidomic analysis of prostate derived exosomes could provide insight for future work on both biomarker and therapeutic targets for the treatment of prostate cancer.</description><identifier>ISSN: 1535-9476</identifier><identifier>EISSN: 1535-9484</identifier><identifier>DOI: 10.1074/mcp.M111.014845</identifier><identifier>PMID: 22723089</identifier><language>eng</language><publisher>United States: Elsevier Inc</publisher><subject>Biomarkers, Tumor - genetics ; Biomarkers, Tumor - metabolism ; Cell Communication ; Cell Line, Tumor ; Cholesterol - analysis ; Chromatography, Liquid ; Cytoplasmic Vesicles - chemistry ; Exosomes - chemistry ; Gene Expression ; Humans ; Male ; Mass Spectrometry ; Microscopy, Electron, Transmission ; Neoplasm Proteins - genetics ; Neoplasm Proteins - metabolism ; Prostate - chemistry ; Prostate - pathology ; Prostatic Neoplasms - chemistry ; Prostatic Neoplasms - diagnosis ; Prostatic Neoplasms - pathology ; Receptors, Androgen - genetics ; Receptors, Androgen - metabolism ; Sphingolipids - analysis ; Tumor Microenvironment</subject><ispartof>Molecular & cellular proteomics, 2012-10, Vol.11 (10), p.863-885</ispartof><rights>2012 © 2012 ASBMB. 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In 2010, ∼217,730 new cases of prostate cancer were reported in the United States. Prompt diagnosis of the disease can substantially improve its clinical outcome. Improving capability for early detection, as well as developing new therapeutic targets in advanced disease are research priorities that will ultimately lead to better patient survival. Eukaryotic cells secrete proteins via distinct regulated mechanisms which are either ER/Golgi dependent or microvesicle mediated. The release of microvesicles has been shown to provide a novel mechanism for intercellular communication. Exosomes are nanometer sized cup-shaped membrane vesicles which are secreted from normal and cancerous cells. They are present in various biological fluids and are rich in characteristic proteins. Exosomes may thus have potential both in facilitating early diagnosis via less invasive procedures or be candidates for novel therapeutic approaches for castration resistance prostate cancer. Because exosomes have been shown previously to have a role in cell-cell communication in the local tumor microenvironment, conferring activation of numerous survival mechanisms, we characterized constitutive lipids, cholesterol and proteins from exosomes derived from six prostate cell lines and tracked their uptake in both cancerous and benign prostate cell lines respectively. Our comprehensive proteomic and lipidomic analysis of prostate derived exosomes could provide insight for future work on both biomarker and therapeutic targets for the treatment of prostate cancer.</description><subject>Biomarkers, Tumor - genetics</subject><subject>Biomarkers, Tumor - metabolism</subject><subject>Cell Communication</subject><subject>Cell Line, Tumor</subject><subject>Cholesterol - analysis</subject><subject>Chromatography, Liquid</subject><subject>Cytoplasmic Vesicles - chemistry</subject><subject>Exosomes - chemistry</subject><subject>Gene Expression</subject><subject>Humans</subject><subject>Male</subject><subject>Mass Spectrometry</subject><subject>Microscopy, Electron, Transmission</subject><subject>Neoplasm Proteins - genetics</subject><subject>Neoplasm Proteins - metabolism</subject><subject>Prostate - chemistry</subject><subject>Prostate - pathology</subject><subject>Prostatic Neoplasms - chemistry</subject><subject>Prostatic Neoplasms - diagnosis</subject><subject>Prostatic Neoplasms - pathology</subject><subject>Receptors, Androgen - genetics</subject><subject>Receptors, Androgen - metabolism</subject><subject>Sphingolipids - analysis</subject><subject>Tumor Microenvironment</subject><issn>1535-9476</issn><issn>1535-9484</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2012</creationdate><recordtype>article</recordtype><recordid>eNp1kU9vEzEQxVcIREvhzA35yCWp7bV31xyQShr-SKmIEJwtxzsmA7t2sJ1A-Sp8WRxtieDAybbmN28871XVU0bnjLbicrS7-Q1jbE6Z6IS8V50zWcuZKo_7p3vbnFWPUvpCKaeslQ-rM85bXtNOnVe_lj9CCiMkYhJ5hWE08StEsvQR7RZ6coM2hgMktAOkF2SxNdHYDBF_mozBk-DIpGAGso4hA_pErkv9UJpdDCMxZG08DEeyACmbDGQBw0BW6MvY75i35BpTRm8zufpA1lvwId_uID2uHjgzJHhyd15Un14vPy7ezlbv37xbXK1mVog6z7hrReMa2THuQDELXNWgXC-ltRtQknK3MbyvlauFUhyMAFd3tqFSmqYrRlxULyfd3X4zQm_B52gGvYtY3LjVwaD-t-Jxqz-Hgy56gglWBJ7fCcTwbQ8p6xGTLTuWxcM-aUY7VgZ1VBT0ckKLrSlFcKcxjOpjpLpEqo-R6inS0vHs79-d-D8ZFkBNABSPDghRJ4vgLfQYwWbdB_yv-G8uKbQ0</recordid><startdate>20121001</startdate><enddate>20121001</enddate><creator>Hosseini-Beheshti, Elham</creator><creator>Pham, Steven</creator><creator>Adomat, Hans</creator><creator>Li, Na</creator><creator>Tomlinson Guns, Emma S.</creator><general>Elsevier Inc</general><general>The American Society for Biochemistry and Molecular Biology</general><scope>6I.</scope><scope>AAFTH</scope><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7X8</scope><scope>5PM</scope></search><sort><creationdate>20121001</creationdate><title>Exosomes as Biomarker Enriched Microvesicles: Characterization of Exosomal Proteins Derived from a Panel of Prostate Cell Lines with Distinct AR Phenotypes</title><author>Hosseini-Beheshti, Elham ; 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Because exosomes have been shown previously to have a role in cell-cell communication in the local tumor microenvironment, conferring activation of numerous survival mechanisms, we characterized constitutive lipids, cholesterol and proteins from exosomes derived from six prostate cell lines and tracked their uptake in both cancerous and benign prostate cell lines respectively. Our comprehensive proteomic and lipidomic analysis of prostate derived exosomes could provide insight for future work on both biomarker and therapeutic targets for the treatment of prostate cancer.</abstract><cop>United States</cop><pub>Elsevier Inc</pub><pmid>22723089</pmid><doi>10.1074/mcp.M111.014845</doi><tpages>23</tpages><oa>free_for_read</oa></addata></record> |
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subjects | Biomarkers, Tumor - genetics Biomarkers, Tumor - metabolism Cell Communication Cell Line, Tumor Cholesterol - analysis Chromatography, Liquid Cytoplasmic Vesicles - chemistry Exosomes - chemistry Gene Expression Humans Male Mass Spectrometry Microscopy, Electron, Transmission Neoplasm Proteins - genetics Neoplasm Proteins - metabolism Prostate - chemistry Prostate - pathology Prostatic Neoplasms - chemistry Prostatic Neoplasms - diagnosis Prostatic Neoplasms - pathology Receptors, Androgen - genetics Receptors, Androgen - metabolism Sphingolipids - analysis Tumor Microenvironment |
title | Exosomes as Biomarker Enriched Microvesicles: Characterization of Exosomal Proteins Derived from a Panel of Prostate Cell Lines with Distinct AR Phenotypes |
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