Detection of prostate cancer‐specific transcripts in extracellular vesicles isolated from post‐DRE urine

Background: The measurement of gene expression in post‐digital rectal examination (DRE) urine specimens provides a non‐invasive method to determine a patient's risk of prostate cancer. Many currently available assays use whole urine or cell pellets for the analysis of prostate cancer‐associated...

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Veröffentlicht in:The Prostate 2017-06, Vol.77 (9), p.990-999
Hauptverfasser: Pellegrini, Kathryn L., Patil, Dattatraya, Douglas, Kristen J.S., Lee, Grace, Wehrmeyer, Kathryn, Torlak, Mersiha, Clark, Jeremy, Cooper, Colin S., Moreno, Carlos S., Sanda, Martin G.
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container_end_page 999
container_issue 9
container_start_page 990
container_title The Prostate
container_volume 77
creator Pellegrini, Kathryn L.
Patil, Dattatraya
Douglas, Kristen J.S.
Lee, Grace
Wehrmeyer, Kathryn
Torlak, Mersiha
Clark, Jeremy
Cooper, Colin S.
Moreno, Carlos S.
Sanda, Martin G.
description Background: The measurement of gene expression in post‐digital rectal examination (DRE) urine specimens provides a non‐invasive method to determine a patient's risk of prostate cancer. Many currently available assays use whole urine or cell pellets for the analysis of prostate cancer‐associated genes, although the use of extracellular vesicles (EVs) has also recently been of interest. We investigated the expression of prostate‐, kidney‐, and bladder‐specific transcripts and known prostate cancer biomarkers in urine EVs. Methods: Cell pellets and EVs were recovered from post‐DRE urine specimens, with the total RNA yield and quality determined by Bioanalyzer. The levels of prostate, kidney, and bladder‐associated transcripts in EVs were assessed by TaqMan qPCR and targeted sequencing. Results: RNA was more consistently recovered from the urine EV specimens, with over 80% of the patients demonstrating higher RNA yields in the EV fraction as compared to urine cell pellets. The median EV RNA yield of 36.4 ng was significantly higher than the median urine cell pellet RNA yield of 4.8 ng. Analysis of the post‐DRE urine EVs indicated that prostate‐specific transcripts were more abundant than kidney‐ or bladder‐specific transcripts. Additionally, patients with prostate cancer had significantly higher levels of the prostate cancer‐associated genes PCA3 and ERG. Conclusions: Post‐DRE urine EVs are a viable source of prostate‐derived RNAs for biomarker discovery and prostate cancer status can be distinguished from analysis of these specimens. Continued analysis of urine EVs offers the potential discovery of novel biomarkers for pre‐biopsy prostate cancer detection.
doi_str_mv 10.1002/pros.23355
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Many currently available assays use whole urine or cell pellets for the analysis of prostate cancer‐associated genes, although the use of extracellular vesicles (EVs) has also recently been of interest. We investigated the expression of prostate‐, kidney‐, and bladder‐specific transcripts and known prostate cancer biomarkers in urine EVs. Methods: Cell pellets and EVs were recovered from post‐DRE urine specimens, with the total RNA yield and quality determined by Bioanalyzer. The levels of prostate, kidney, and bladder‐associated transcripts in EVs were assessed by TaqMan qPCR and targeted sequencing. Results: RNA was more consistently recovered from the urine EV specimens, with over 80% of the patients demonstrating higher RNA yields in the EV fraction as compared to urine cell pellets. The median EV RNA yield of 36.4 ng was significantly higher than the median urine cell pellet RNA yield of 4.8 ng. Analysis of the post‐DRE urine EVs indicated that prostate‐specific transcripts were more abundant than kidney‐ or bladder‐specific transcripts. Additionally, patients with prostate cancer had significantly higher levels of the prostate cancer‐associated genes PCA3 and ERG. Conclusions: Post‐DRE urine EVs are a viable source of prostate‐derived RNAs for biomarker discovery and prostate cancer status can be distinguished from analysis of these specimens. Continued analysis of urine EVs offers the potential discovery of novel biomarkers for pre‐biopsy prostate cancer detection.</description><identifier>ISSN: 0270-4137</identifier><identifier>ISSN: 1097-0045</identifier><identifier>EISSN: 1097-0045</identifier><identifier>DOI: 10.1002/pros.23355</identifier><identifier>PMID: 28419548</identifier><language>eng</language><publisher>United States: Wiley Subscription Services, Inc</publisher><subject>Adult ; Aged ; Antigens, Neoplasm - genetics ; Antigens, Neoplasm - urine ; Biomarkers ; Biomarkers, Tumor - urine ; Biopsy ; Bladder ; Digital Rectal Examination - methods ; Early Detection of Cancer - methods ; ERG ; Extracellular vesicles ; Extracellular Vesicles - metabolism ; Extracellular Vesicles - pathology ; Gene expression ; Gene Expression Profiling ; Humans ; Kidneys ; Male ; Middle Aged ; PCA3 ; Prostate - metabolism ; Prostate - pathology ; Prostate cancer ; Prostatic Neoplasms - diagnosis ; Prostatic Neoplasms - genetics ; Prostatic Neoplasms - pathology ; Prostatic Neoplasms - urine ; Rectum ; Reproducibility of Results ; Ribonucleic acid ; RNA ; Transcriptional Regulator ERG - genetics ; Transcriptional Regulator ERG - urine ; Urinalysis - methods ; Urinary bladder ; Urine</subject><ispartof>The Prostate, 2017-06, Vol.77 (9), p.990-999</ispartof><rights>2017 Wiley Periodicals, Inc.</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c4485-7660de09905f3e2051f20d5de2b7e41d8abe11357af4e59f0015497212a4a993</citedby><cites>FETCH-LOGICAL-c4485-7660de09905f3e2051f20d5de2b7e41d8abe11357af4e59f0015497212a4a993</cites><orcidid>0000-0002-5089-5477</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://onlinelibrary.wiley.com/doi/pdf/10.1002%2Fpros.23355$$EPDF$$P50$$Gwiley$$H</linktopdf><linktohtml>$$Uhttps://onlinelibrary.wiley.com/doi/full/10.1002%2Fpros.23355$$EHTML$$P50$$Gwiley$$H</linktohtml><link.rule.ids>230,314,780,784,885,1417,27924,27925,45574,45575</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/28419548$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Pellegrini, Kathryn L.</creatorcontrib><creatorcontrib>Patil, Dattatraya</creatorcontrib><creatorcontrib>Douglas, Kristen J.S.</creatorcontrib><creatorcontrib>Lee, Grace</creatorcontrib><creatorcontrib>Wehrmeyer, Kathryn</creatorcontrib><creatorcontrib>Torlak, Mersiha</creatorcontrib><creatorcontrib>Clark, Jeremy</creatorcontrib><creatorcontrib>Cooper, Colin S.</creatorcontrib><creatorcontrib>Moreno, Carlos S.</creatorcontrib><creatorcontrib>Sanda, Martin G.</creatorcontrib><title>Detection of prostate cancer‐specific transcripts in extracellular vesicles isolated from post‐DRE urine</title><title>The Prostate</title><addtitle>Prostate</addtitle><description>Background: The measurement of gene expression in post‐digital rectal examination (DRE) urine specimens provides a non‐invasive method to determine a patient's risk of prostate cancer. Many currently available assays use whole urine or cell pellets for the analysis of prostate cancer‐associated genes, although the use of extracellular vesicles (EVs) has also recently been of interest. We investigated the expression of prostate‐, kidney‐, and bladder‐specific transcripts and known prostate cancer biomarkers in urine EVs. Methods: Cell pellets and EVs were recovered from post‐DRE urine specimens, with the total RNA yield and quality determined by Bioanalyzer. The levels of prostate, kidney, and bladder‐associated transcripts in EVs were assessed by TaqMan qPCR and targeted sequencing. Results: RNA was more consistently recovered from the urine EV specimens, with over 80% of the patients demonstrating higher RNA yields in the EV fraction as compared to urine cell pellets. The median EV RNA yield of 36.4 ng was significantly higher than the median urine cell pellet RNA yield of 4.8 ng. Analysis of the post‐DRE urine EVs indicated that prostate‐specific transcripts were more abundant than kidney‐ or bladder‐specific transcripts. Additionally, patients with prostate cancer had significantly higher levels of the prostate cancer‐associated genes PCA3 and ERG. Conclusions: Post‐DRE urine EVs are a viable source of prostate‐derived RNAs for biomarker discovery and prostate cancer status can be distinguished from analysis of these specimens. 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Medical Complete (Alumni)</collection><collection>Biotechnology and BioEngineering Abstracts</collection><collection>Genetics Abstracts</collection><collection>MEDLINE - Academic</collection><collection>PubMed Central (Full Participant titles)</collection><jtitle>The Prostate</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Pellegrini, Kathryn L.</au><au>Patil, Dattatraya</au><au>Douglas, Kristen J.S.</au><au>Lee, Grace</au><au>Wehrmeyer, Kathryn</au><au>Torlak, Mersiha</au><au>Clark, Jeremy</au><au>Cooper, Colin S.</au><au>Moreno, Carlos S.</au><au>Sanda, Martin G.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Detection of prostate cancer‐specific transcripts in extracellular vesicles isolated from post‐DRE urine</atitle><jtitle>The Prostate</jtitle><addtitle>Prostate</addtitle><date>2017-06</date><risdate>2017</risdate><volume>77</volume><issue>9</issue><spage>990</spage><epage>999</epage><pages>990-999</pages><issn>0270-4137</issn><issn>1097-0045</issn><eissn>1097-0045</eissn><abstract>Background: The measurement of gene expression in post‐digital rectal examination (DRE) urine specimens provides a non‐invasive method to determine a patient's risk of prostate cancer. Many currently available assays use whole urine or cell pellets for the analysis of prostate cancer‐associated genes, although the use of extracellular vesicles (EVs) has also recently been of interest. We investigated the expression of prostate‐, kidney‐, and bladder‐specific transcripts and known prostate cancer biomarkers in urine EVs. Methods: Cell pellets and EVs were recovered from post‐DRE urine specimens, with the total RNA yield and quality determined by Bioanalyzer. The levels of prostate, kidney, and bladder‐associated transcripts in EVs were assessed by TaqMan qPCR and targeted sequencing. Results: RNA was more consistently recovered from the urine EV specimens, with over 80% of the patients demonstrating higher RNA yields in the EV fraction as compared to urine cell pellets. The median EV RNA yield of 36.4 ng was significantly higher than the median urine cell pellet RNA yield of 4.8 ng. Analysis of the post‐DRE urine EVs indicated that prostate‐specific transcripts were more abundant than kidney‐ or bladder‐specific transcripts. Additionally, patients with prostate cancer had significantly higher levels of the prostate cancer‐associated genes PCA3 and ERG. Conclusions: Post‐DRE urine EVs are a viable source of prostate‐derived RNAs for biomarker discovery and prostate cancer status can be distinguished from analysis of these specimens. Continued analysis of urine EVs offers the potential discovery of novel biomarkers for pre‐biopsy prostate cancer detection.</abstract><cop>United States</cop><pub>Wiley Subscription Services, Inc</pub><pmid>28419548</pmid><doi>10.1002/pros.23355</doi><tpages>10</tpages><orcidid>https://orcid.org/0000-0002-5089-5477</orcidid><oa>free_for_read</oa></addata></record>
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source MEDLINE; Wiley Online Library Journals Frontfile Complete
subjects Adult
Aged
Antigens, Neoplasm - genetics
Antigens, Neoplasm - urine
Biomarkers
Biomarkers, Tumor - urine
Biopsy
Bladder
Digital Rectal Examination - methods
Early Detection of Cancer - methods
ERG
Extracellular vesicles
Extracellular Vesicles - metabolism
Extracellular Vesicles - pathology
Gene expression
Gene Expression Profiling
Humans
Kidneys
Male
Middle Aged
PCA3
Prostate - metabolism
Prostate - pathology
Prostate cancer
Prostatic Neoplasms - diagnosis
Prostatic Neoplasms - genetics
Prostatic Neoplasms - pathology
Prostatic Neoplasms - urine
Rectum
Reproducibility of Results
Ribonucleic acid
RNA
Transcriptional Regulator ERG - genetics
Transcriptional Regulator ERG - urine
Urinalysis - methods
Urinary bladder
Urine
title Detection of prostate cancer‐specific transcripts in extracellular vesicles isolated from post‐DRE urine
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