PARP1 and phospho-p65 protein expression is increased in human HER2-positive breast cancers

Previous studies have shown that basal breast cancers, which may have an inherent “BRCAness” phenotype and sensitivity to inhibitors of poly (ADP-Ribose) polymerase (PARP), express elevated levels of PARP1. Our lab recently reported that HER2+ breast cancers also exhibit sensitivity to PARP inhibito...

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Veröffentlicht in:Breast cancer research and treatment 2015-04, Vol.150 (3), p.569-579
Hauptverfasser: Stanley, Jennifer, Klepczyk, Lisa, Keene, Kimberly, Wei, Shi, Li, Yufeng, Forero, Andres, Grizzle, William, Wielgos, Monica, Brazelton, Jason, LoBuglio, Albert F., Yang, Eddy S.
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container_end_page 579
container_issue 3
container_start_page 569
container_title Breast cancer research and treatment
container_volume 150
creator Stanley, Jennifer
Klepczyk, Lisa
Keene, Kimberly
Wei, Shi
Li, Yufeng
Forero, Andres
Grizzle, William
Wielgos, Monica
Brazelton, Jason
LoBuglio, Albert F.
Yang, Eddy S.
description Previous studies have shown that basal breast cancers, which may have an inherent “BRCAness” phenotype and sensitivity to inhibitors of poly (ADP-Ribose) polymerase (PARP), express elevated levels of PARP1. Our lab recently reported that HER2+ breast cancers also exhibit sensitivity to PARP inhibitors (PARPi) by attenuating the NF-κB pathway. In this study, we assessed PARP1 and phospho-p65, a marker of activated NF-κB levels in human breast cancer tissues. PARP1 and PARP2 copy number, mRNA, and protein expression was assessed by interrogating the PAM-50 defined breast cancer patient set from the TCGA using cBioPortal. PARP1 and phospho-p65 immunohistochemistry and correlation to clinical parameters was conducted using 307 primary breast cancer specimens (132 basal, 82 luminal, 93 HER2+) through univariate and multivariate analyses. In the PAM50 breast cancer data set, PARP1 and 2 expression was altered in 24/58 (41 %) HER2+, 32/81 (40 %) basal, and 75/324 (23 %) luminal A/B breast cancer patients. This correlated with a statistically significant increase in PARP1 protein levels in HER2+ and basal but not luminal breast cancers ( p  = 0.003, p  = 0.027, p  = 0.289, respectively). No change in PARP2 protein level was observed. Interestingly, using breast cancer specimens from 307 patients, HER2 positivity correlated with elevated PARP1 expression ( p  
doi_str_mv 10.1007/s10549-015-3359-6
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Our lab recently reported that HER2+ breast cancers also exhibit sensitivity to PARP inhibitors (PARPi) by attenuating the NF-κB pathway. In this study, we assessed PARP1 and phospho-p65, a marker of activated NF-κB levels in human breast cancer tissues. PARP1 and PARP2 copy number, mRNA, and protein expression was assessed by interrogating the PAM-50 defined breast cancer patient set from the TCGA using cBioPortal. PARP1 and phospho-p65 immunohistochemistry and correlation to clinical parameters was conducted using 307 primary breast cancer specimens (132 basal, 82 luminal, 93 HER2+) through univariate and multivariate analyses. In the PAM50 breast cancer data set, PARP1 and 2 expression was altered in 24/58 (41 %) HER2+, 32/81 (40 %) basal, and 75/324 (23 %) luminal A/B breast cancer patients. This correlated with a statistically significant increase in PARP1 protein levels in HER2+ and basal but not luminal breast cancers ( p  = 0.003, p  = 0.027, p  = 0.289, respectively). No change in PARP2 protein level was observed. Interestingly, using breast cancer specimens from 307 patients, HER2 positivity correlated with elevated PARP1 expression ( p  &lt; 0.0001) and was three times more likely than HER2 negative breast cancers to exhibit high PARP1 levels. No significant differences were noted between race, ER status, or PR status for PARP1 expression. Additionally, we found a significant correlation between HER2 status and phospho-p65 expression ( p  &lt; 0.0001). Lastly, a direct correlation between PARP1 and phospho-p65 ( p  &lt; 0.0001) was noted. These results indicate a potential connection between HER2, PARP1, and phospho-p65. Furthermore, these data suggest that the PARPi sensitivity we previously observed in HER2+ breast cancer cells may be due to elevated PARP1 expression.</description><identifier>ISSN: 0167-6806</identifier><identifier>EISSN: 1573-7217</identifier><identifier>DOI: 10.1007/s10549-015-3359-6</identifier><identifier>PMID: 25833211</identifier><identifier>CODEN: BCTRD6</identifier><language>eng</language><publisher>Boston: Springer US</publisher><subject>Adult ; Aged ; Aged, 80 and over ; Analysis ; Breast cancer ; Breast Neoplasms - genetics ; Breast Neoplasms - metabolism ; Breast Neoplasms - pathology ; Cancer research ; Cancer therapies ; Female ; Genetic markers ; Humans ; Immunohistochemistry ; Medicine ; Medicine &amp; Public Health ; Middle Aged ; Oncology ; Phosphorylation ; Poly (ADP-Ribose) Polymerase-1 ; Poly(ADP-ribose) Polymerases - genetics ; Poly(ADP-ribose) Polymerases - metabolism ; Preclinical Study ; Protein expression ; Receptor, ErbB-2 - metabolism ; RNA ; Signal Transduction ; Transcription Factor RelA - metabolism ; Young Adult</subject><ispartof>Breast cancer research and treatment, 2015-04, Vol.150 (3), p.569-579</ispartof><rights>Springer Science+Business Media New York 2015</rights><rights>COPYRIGHT 2015 Springer</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c568t-fbbb68f5499273211de48832650b081f327786b8abb943cac6ecca588d4cada93</citedby><cites>FETCH-LOGICAL-c568t-fbbb68f5499273211de48832650b081f327786b8abb943cac6ecca588d4cada93</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://link.springer.com/content/pdf/10.1007/s10549-015-3359-6$$EPDF$$P50$$Gspringer$$H</linktopdf><linktohtml>$$Uhttps://link.springer.com/10.1007/s10549-015-3359-6$$EHTML$$P50$$Gspringer$$H</linktohtml><link.rule.ids>230,314,780,784,885,27923,27924,41487,42556,51318</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/25833211$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Stanley, Jennifer</creatorcontrib><creatorcontrib>Klepczyk, Lisa</creatorcontrib><creatorcontrib>Keene, Kimberly</creatorcontrib><creatorcontrib>Wei, Shi</creatorcontrib><creatorcontrib>Li, Yufeng</creatorcontrib><creatorcontrib>Forero, Andres</creatorcontrib><creatorcontrib>Grizzle, William</creatorcontrib><creatorcontrib>Wielgos, Monica</creatorcontrib><creatorcontrib>Brazelton, Jason</creatorcontrib><creatorcontrib>LoBuglio, Albert F.</creatorcontrib><creatorcontrib>Yang, Eddy S.</creatorcontrib><title>PARP1 and phospho-p65 protein expression is increased in human HER2-positive breast cancers</title><title>Breast cancer research and treatment</title><addtitle>Breast Cancer Res Treat</addtitle><addtitle>Breast Cancer Res Treat</addtitle><description>Previous studies have shown that basal breast cancers, which may have an inherent “BRCAness” phenotype and sensitivity to inhibitors of poly (ADP-Ribose) polymerase (PARP), express elevated levels of PARP1. Our lab recently reported that HER2+ breast cancers also exhibit sensitivity to PARP inhibitors (PARPi) by attenuating the NF-κB pathway. In this study, we assessed PARP1 and phospho-p65, a marker of activated NF-κB levels in human breast cancer tissues. PARP1 and PARP2 copy number, mRNA, and protein expression was assessed by interrogating the PAM-50 defined breast cancer patient set from the TCGA using cBioPortal. PARP1 and phospho-p65 immunohistochemistry and correlation to clinical parameters was conducted using 307 primary breast cancer specimens (132 basal, 82 luminal, 93 HER2+) through univariate and multivariate analyses. In the PAM50 breast cancer data set, PARP1 and 2 expression was altered in 24/58 (41 %) HER2+, 32/81 (40 %) basal, and 75/324 (23 %) luminal A/B breast cancer patients. This correlated with a statistically significant increase in PARP1 protein levels in HER2+ and basal but not luminal breast cancers ( p  = 0.003, p  = 0.027, p  = 0.289, respectively). No change in PARP2 protein level was observed. Interestingly, using breast cancer specimens from 307 patients, HER2 positivity correlated with elevated PARP1 expression ( p  &lt; 0.0001) and was three times more likely than HER2 negative breast cancers to exhibit high PARP1 levels. No significant differences were noted between race, ER status, or PR status for PARP1 expression. Additionally, we found a significant correlation between HER2 status and phospho-p65 expression ( p  &lt; 0.0001). Lastly, a direct correlation between PARP1 and phospho-p65 ( p  &lt; 0.0001) was noted. These results indicate a potential connection between HER2, PARP1, and phospho-p65. Furthermore, these data suggest that the PARPi sensitivity we previously observed in HER2+ breast cancer cells may be due to elevated PARP1 expression.</description><subject>Adult</subject><subject>Aged</subject><subject>Aged, 80 and over</subject><subject>Analysis</subject><subject>Breast cancer</subject><subject>Breast Neoplasms - genetics</subject><subject>Breast Neoplasms - metabolism</subject><subject>Breast Neoplasms - pathology</subject><subject>Cancer research</subject><subject>Cancer therapies</subject><subject>Female</subject><subject>Genetic markers</subject><subject>Humans</subject><subject>Immunohistochemistry</subject><subject>Medicine</subject><subject>Medicine &amp; Public Health</subject><subject>Middle Aged</subject><subject>Oncology</subject><subject>Phosphorylation</subject><subject>Poly (ADP-Ribose) Polymerase-1</subject><subject>Poly(ADP-ribose) Polymerases - genetics</subject><subject>Poly(ADP-ribose) Polymerases - metabolism</subject><subject>Preclinical Study</subject><subject>Protein expression</subject><subject>Receptor, ErbB-2 - metabolism</subject><subject>RNA</subject><subject>Signal Transduction</subject><subject>Transcription Factor RelA - metabolism</subject><subject>Young Adult</subject><issn>0167-6806</issn><issn>1573-7217</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2015</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><sourceid>8G5</sourceid><sourceid>ABUWG</sourceid><sourceid>AFKRA</sourceid><sourceid>AZQEC</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><sourceid>GNUQQ</sourceid><sourceid>GUQSH</sourceid><sourceid>M2O</sourceid><recordid>eNp1kt9r1TAUx4so7jr9A3yRgCC-ZOZHk6YvwmVMJwwcQ598CGl6epvRJjVph_73ptw57xUlhIScz_km5-RbFC8pOaOEVO8SJaKsMaECcy5qLB8VGyoqjitGq8fFhlBZYamIPCmepXRLCKkrUj8tTphQnDNKN8W36-3NNUXGt2jqQ8oTT1KgKYYZnEfwY4qQkgseuYSctxFMgjbvUL-MxqPLixuGp5Dc7O4ANWt4RtZ4CzE9L550Zkjw4n49Lb5-uPhyfomvPn_8dL69wlZINeOuaRqpulxJzar1VS2USnEmBWmIoh1nVaVko0zT1CW3xkqw1gil2tKa1tT8tHi_152WZoTWgp-jGfQU3WjiTx2M08cR73q9C3e65LWUrMwCb-8FYvi-QJr16JKFYTAewpI0lbJWnApFM_r6L_Q2LNHn8jKVCyBMcPaH2pkBtPNdyPfaVVRvS054yVlZZersH1QeLYzOBg-dy-dHCW8OEnoww9ynMCxz_p90DNI9aGNIKUL30AxK9GodvbeOztbRq3W0zDmvDrv4kPHbKxlgeyDlkN9BPCj9v6q_AEu6zBU</recordid><startdate>20150401</startdate><enddate>20150401</enddate><creator>Stanley, Jennifer</creator><creator>Klepczyk, Lisa</creator><creator>Keene, Kimberly</creator><creator>Wei, Shi</creator><creator>Li, Yufeng</creator><creator>Forero, Andres</creator><creator>Grizzle, William</creator><creator>Wielgos, Monica</creator><creator>Brazelton, Jason</creator><creator>LoBuglio, Albert F.</creator><creator>Yang, Eddy S.</creator><general>Springer US</general><general>Springer</general><general>Springer Nature B.V</general><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>3V.</scope><scope>7TO</scope><scope>7X7</scope><scope>7XB</scope><scope>88E</scope><scope>8AO</scope><scope>8C1</scope><scope>8FI</scope><scope>8FJ</scope><scope>8FK</scope><scope>8G5</scope><scope>ABUWG</scope><scope>AFKRA</scope><scope>AZQEC</scope><scope>BENPR</scope><scope>CCPQU</scope><scope>DWQXO</scope><scope>FYUFA</scope><scope>GHDGH</scope><scope>GNUQQ</scope><scope>GUQSH</scope><scope>H94</scope><scope>K9-</scope><scope>K9.</scope><scope>M0R</scope><scope>M0S</scope><scope>M1P</scope><scope>M2O</scope><scope>MBDVC</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PRINS</scope><scope>Q9U</scope><scope>7X8</scope><scope>5PM</scope></search><sort><creationdate>20150401</creationdate><title>PARP1 and phospho-p65 protein expression is increased in human HER2-positive breast cancers</title><author>Stanley, Jennifer ; 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Our lab recently reported that HER2+ breast cancers also exhibit sensitivity to PARP inhibitors (PARPi) by attenuating the NF-κB pathway. In this study, we assessed PARP1 and phospho-p65, a marker of activated NF-κB levels in human breast cancer tissues. PARP1 and PARP2 copy number, mRNA, and protein expression was assessed by interrogating the PAM-50 defined breast cancer patient set from the TCGA using cBioPortal. PARP1 and phospho-p65 immunohistochemistry and correlation to clinical parameters was conducted using 307 primary breast cancer specimens (132 basal, 82 luminal, 93 HER2+) through univariate and multivariate analyses. In the PAM50 breast cancer data set, PARP1 and 2 expression was altered in 24/58 (41 %) HER2+, 32/81 (40 %) basal, and 75/324 (23 %) luminal A/B breast cancer patients. This correlated with a statistically significant increase in PARP1 protein levels in HER2+ and basal but not luminal breast cancers ( p  = 0.003, p  = 0.027, p  = 0.289, respectively). No change in PARP2 protein level was observed. Interestingly, using breast cancer specimens from 307 patients, HER2 positivity correlated with elevated PARP1 expression ( p  &lt; 0.0001) and was three times more likely than HER2 negative breast cancers to exhibit high PARP1 levels. No significant differences were noted between race, ER status, or PR status for PARP1 expression. Additionally, we found a significant correlation between HER2 status and phospho-p65 expression ( p  &lt; 0.0001). Lastly, a direct correlation between PARP1 and phospho-p65 ( p  &lt; 0.0001) was noted. These results indicate a potential connection between HER2, PARP1, and phospho-p65. Furthermore, these data suggest that the PARPi sensitivity we previously observed in HER2+ breast cancer cells may be due to elevated PARP1 expression.</abstract><cop>Boston</cop><pub>Springer US</pub><pmid>25833211</pmid><doi>10.1007/s10549-015-3359-6</doi><tpages>11</tpages><oa>free_for_read</oa></addata></record>
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1573-7217
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source MEDLINE; SpringerLink Journals - AutoHoldings
subjects Adult
Aged
Aged, 80 and over
Analysis
Breast cancer
Breast Neoplasms - genetics
Breast Neoplasms - metabolism
Breast Neoplasms - pathology
Cancer research
Cancer therapies
Female
Genetic markers
Humans
Immunohistochemistry
Medicine
Medicine & Public Health
Middle Aged
Oncology
Phosphorylation
Poly (ADP-Ribose) Polymerase-1
Poly(ADP-ribose) Polymerases - genetics
Poly(ADP-ribose) Polymerases - metabolism
Preclinical Study
Protein expression
Receptor, ErbB-2 - metabolism
RNA
Signal Transduction
Transcription Factor RelA - metabolism
Young Adult
title PARP1 and phospho-p65 protein expression is increased in human HER2-positive breast cancers
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