Breast cancer expresses functional NMDA receptors

We demonstrate here that functional NMDAR1 and NMDAR2 receptors are expressed by Mcf-7 and SKBR3 breast cancer cell lines, and possibly by most or all high-grade breast tumors, and that these receptors are important for the growth of human breast cancer xenografts in mice. RT-PCR demonstrated mRNA f...

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Veröffentlicht in:Breast cancer research and treatment 2010-07, Vol.122 (2), p.307-314
Hauptverfasser: North, William G, Gao, Guohong, Memoli, Vincent A, Pang, Roy H, Lynch, Launa
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container_issue 2
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container_title Breast cancer research and treatment
container_volume 122
creator North, William G
Gao, Guohong
Memoli, Vincent A
Pang, Roy H
Lynch, Launa
description We demonstrate here that functional NMDAR1 and NMDAR2 receptors are expressed by Mcf-7 and SKBR3 breast cancer cell lines, and possibly by most or all high-grade breast tumors, and that these receptors are important for the growth of human breast cancer xenografts in mice. RT-PCR demonstrated mRNA for both NMDAR1 and NMDAR2 receptors are expressed in both Mcf-7 and SKBR3 cell lines, and these messages likely have sequences identical to those reported for human mRNAs. Proteins of the expected respective sizes 120 and 170 kD are generated from these mRNAs by the tumor cells. Cell growth was found to be significantly (P < 0.0001) impaired down to 10% of normal growth by the irreversible NMDAR1 antagonists MK-801 and memantine with IC 50s ranging from 600 to >800 µM and from 200 to 300 µM for the two lines. Paradoxically, memantine with a lower binding affinity had the greater influence of the two inhibitors on cell viability. Immunohistochemical examination of high-grade invasive ductal and lobular breast cancer with our polyclonal antibodies against a peptide (-Met-Ser-Ile-Tyr-Ser-Asp-Lys-Ser-Ile-His-) in the extracellular domain of the NMDAR1 receptor gave specific positive staining for the receptor in all 10 cases examined. Positive staining was chiefly concentrated at the membranes of these tumor tissues. No staining with these antibodies was found for normal breast and kidney tissues. When Mcf-7 cells were grown as tumor xenografts in nu/nu mice, the growth of these tumors was completely arrested by daily treatments with MK-801 over 5 days. All of these data point to active NMDAR receptors being expressed by most breast cancers, and having an important influence on their survival.
doi_str_mv 10.1007/s10549-009-0556-1
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RT-PCR demonstrated mRNA for both NMDAR1 and NMDAR2 receptors are expressed in both Mcf-7 and SKBR3 cell lines, and these messages likely have sequences identical to those reported for human mRNAs. Proteins of the expected respective sizes 120 and 170 kD are generated from these mRNAs by the tumor cells. Cell growth was found to be significantly (P &lt; 0.0001) impaired down to 10% of normal growth by the irreversible NMDAR1 antagonists MK-801 and memantine with IC 50s ranging from 600 to &gt;800 µM and from 200 to 300 µM for the two lines. Paradoxically, memantine with a lower binding affinity had the greater influence of the two inhibitors on cell viability. Immunohistochemical examination of high-grade invasive ductal and lobular breast cancer with our polyclonal antibodies against a peptide (-Met-Ser-Ile-Tyr-Ser-Asp-Lys-Ser-Ile-His-) in the extracellular domain of the NMDAR1 receptor gave specific positive staining for the receptor in all 10 cases examined. Positive staining was chiefly concentrated at the membranes of these tumor tissues. No staining with these antibodies was found for normal breast and kidney tissues. When Mcf-7 cells were grown as tumor xenografts in nu/nu mice, the growth of these tumors was completely arrested by daily treatments with MK-801 over 5 days. 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RT-PCR demonstrated mRNA for both NMDAR1 and NMDAR2 receptors are expressed in both Mcf-7 and SKBR3 cell lines, and these messages likely have sequences identical to those reported for human mRNAs. Proteins of the expected respective sizes 120 and 170 kD are generated from these mRNAs by the tumor cells. Cell growth was found to be significantly (P &lt; 0.0001) impaired down to 10% of normal growth by the irreversible NMDAR1 antagonists MK-801 and memantine with IC 50s ranging from 600 to &gt;800 µM and from 200 to 300 µM for the two lines. Paradoxically, memantine with a lower binding affinity had the greater influence of the two inhibitors on cell viability. Immunohistochemical examination of high-grade invasive ductal and lobular breast cancer with our polyclonal antibodies against a peptide (-Met-Ser-Ile-Tyr-Ser-Asp-Lys-Ser-Ile-His-) in the extracellular domain of the NMDAR1 receptor gave specific positive staining for the receptor in all 10 cases examined. Positive staining was chiefly concentrated at the membranes of these tumor tissues. No staining with these antibodies was found for normal breast and kidney tissues. When Mcf-7 cells were grown as tumor xenografts in nu/nu mice, the growth of these tumors was completely arrested by daily treatments with MK-801 over 5 days. 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Obstetrics</topic><topic>Humans</topic><topic>Inhibitory Concentration 50</topic><topic>Mammary gland diseases</topic><topic>Medical sciences</topic><topic>Medicine</topic><topic>Medicine &amp; Public Health</topic><topic>Memantine - pharmacology</topic><topic>Methyl aspartate</topic><topic>Mice</topic><topic>Mice, Nude</topic><topic>Nerve Tissue Proteins - antagonists &amp; inhibitors</topic><topic>Nerve Tissue Proteins - genetics</topic><topic>Nerve Tissue Proteins - metabolism</topic><topic>NMDA receptors</topic><topic>Oncology</topic><topic>Preclinical Study</topic><topic>Proteins</topic><topic>Receptors, N-Methyl-D-Aspartate - antagonists &amp; inhibitors</topic><topic>Receptors, N-Methyl-D-Aspartate - genetics</topic><topic>Receptors, N-Methyl-D-Aspartate - metabolism</topic><topic>RNA</topic><topic>RNA, Messenger - metabolism</topic><topic>Rodents</topic><topic>Time Factors</topic><topic>Tumor Burden</topic><topic>Tumor growth</topic><topic>Tumor markers</topic><topic>Tumors</topic><topic>Viral antibodies</topic><topic>Xenograft Model Antitumor Assays</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>North, William G</creatorcontrib><creatorcontrib>Gao, Guohong</creatorcontrib><creatorcontrib>Memoli, Vincent A</creatorcontrib><creatorcontrib>Pang, Roy H</creatorcontrib><creatorcontrib>Lynch, Launa</creatorcontrib><collection>AGRIS</collection><collection>Pascal-Francis</collection><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>ProQuest Central (Corporate)</collection><collection>Oncogenes and Growth Factors Abstracts</collection><collection>Health &amp; Medical Collection</collection><collection>ProQuest Central (purchase pre-March 2016)</collection><collection>Medical Database (Alumni Edition)</collection><collection>ProQuest Pharma Collection</collection><collection>Public Health Database</collection><collection>Hospital Premium Collection</collection><collection>Hospital Premium Collection (Alumni Edition)</collection><collection>ProQuest Central (Alumni) (purchase pre-March 2016)</collection><collection>Research Library (Alumni Edition)</collection><collection>ProQuest Central (Alumni Edition)</collection><collection>ProQuest Central UK/Ireland</collection><collection>ProQuest Central Essentials</collection><collection>ProQuest Central</collection><collection>ProQuest One Community College</collection><collection>ProQuest Central Korea</collection><collection>Health Research Premium Collection</collection><collection>Health Research Premium Collection (Alumni)</collection><collection>ProQuest Central Student</collection><collection>Research Library Prep</collection><collection>AIDS and Cancer Research Abstracts</collection><collection>Consumer Health Database (Alumni Edition)</collection><collection>ProQuest Health &amp; Medical Complete (Alumni)</collection><collection>Consumer Health Database</collection><collection>Health &amp; Medical Collection (Alumni Edition)</collection><collection>Medical Database</collection><collection>Research Library</collection><collection>Research Library (Corporate)</collection><collection>ProQuest One Academic Eastern Edition (DO NOT USE)</collection><collection>ProQuest One Academic</collection><collection>ProQuest One Academic UKI Edition</collection><collection>ProQuest Central Basic</collection><collection>Neurosciences Abstracts</collection><collection>PubMed Central (Full Participant titles)</collection><jtitle>Breast cancer research and treatment</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>North, William G</au><au>Gao, Guohong</au><au>Memoli, Vincent A</au><au>Pang, Roy H</au><au>Lynch, Launa</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Breast cancer expresses functional NMDA receptors</atitle><jtitle>Breast cancer research and treatment</jtitle><stitle>Breast Cancer Res Treat</stitle><addtitle>Breast Cancer Res Treat</addtitle><date>2010-07-01</date><risdate>2010</risdate><volume>122</volume><issue>2</issue><spage>307</spage><epage>314</epage><pages>307-314</pages><issn>0167-6806</issn><eissn>1573-7217</eissn><coden>BCTRD6</coden><abstract>We demonstrate here that functional NMDAR1 and NMDAR2 receptors are expressed by Mcf-7 and SKBR3 breast cancer cell lines, and possibly by most or all high-grade breast tumors, and that these receptors are important for the growth of human breast cancer xenografts in mice. RT-PCR demonstrated mRNA for both NMDAR1 and NMDAR2 receptors are expressed in both Mcf-7 and SKBR3 cell lines, and these messages likely have sequences identical to those reported for human mRNAs. Proteins of the expected respective sizes 120 and 170 kD are generated from these mRNAs by the tumor cells. Cell growth was found to be significantly (P &lt; 0.0001) impaired down to 10% of normal growth by the irreversible NMDAR1 antagonists MK-801 and memantine with IC 50s ranging from 600 to &gt;800 µM and from 200 to 300 µM for the two lines. Paradoxically, memantine with a lower binding affinity had the greater influence of the two inhibitors on cell viability. Immunohistochemical examination of high-grade invasive ductal and lobular breast cancer with our polyclonal antibodies against a peptide (-Met-Ser-Ile-Tyr-Ser-Asp-Lys-Ser-Ile-His-) in the extracellular domain of the NMDAR1 receptor gave specific positive staining for the receptor in all 10 cases examined. Positive staining was chiefly concentrated at the membranes of these tumor tissues. No staining with these antibodies was found for normal breast and kidney tissues. When Mcf-7 cells were grown as tumor xenografts in nu/nu mice, the growth of these tumors was completely arrested by daily treatments with MK-801 over 5 days. All of these data point to active NMDAR receptors being expressed by most breast cancers, and having an important influence on their survival.</abstract><cop>New York</cop><pub>Boston : Springer US</pub><pmid>19784770</pmid><doi>10.1007/s10549-009-0556-1</doi><tpages>8</tpages><oa>free_for_read</oa></addata></record>
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subjects Animals
Antibodies
Antineoplastic Agents - pharmacology
Biological and medical sciences
Breast cancer
breast neoplasms
Breast Neoplasms - drug therapy
Breast Neoplasms - genetics
Breast Neoplasms - metabolism
Breast Neoplasms - pathology
Cancer research
Cancer therapies
Carrier Proteins - antagonists & inhibitors
Carrier Proteins - genetics
Carrier Proteins - metabolism
Cell Line, Tumor
Cell Proliferation - drug effects
Cell Survival
Cellular biology
Dizocilpine Maleate - pharmacology
Dose-Response Relationship, Drug
Excitatory Amino Acid Antagonists - pharmacology
Female
Gene Expression Regulation, Neoplastic
Gynecology. Andrology. Obstetrics
Humans
Inhibitory Concentration 50
Mammary gland diseases
Medical sciences
Medicine
Medicine & Public Health
Memantine - pharmacology
Methyl aspartate
Mice
Mice, Nude
Nerve Tissue Proteins - antagonists & inhibitors
Nerve Tissue Proteins - genetics
Nerve Tissue Proteins - metabolism
NMDA receptors
Oncology
Preclinical Study
Proteins
Receptors, N-Methyl-D-Aspartate - antagonists & inhibitors
Receptors, N-Methyl-D-Aspartate - genetics
Receptors, N-Methyl-D-Aspartate - metabolism
RNA
RNA, Messenger - metabolism
Rodents
Time Factors
Tumor Burden
Tumor growth
Tumor markers
Tumors
Viral antibodies
Xenograft Model Antitumor Assays
title Breast cancer expresses functional NMDA receptors
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