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De novo expression of EphA2 in osteosarcoma modulates activation of the mitogenic signalling pathway

Identifieur interne : 000E49 ( Istex/Corpus ); précédent : 000E48; suivant : 000E50

De novo expression of EphA2 in osteosarcoma modulates activation of the mitogenic signalling pathway

Auteurs : Raphaela Fritsche-Guenther ; Aurelia Noske ; Ute Ungethüm ; Ralf-Jürgen Kuban ; Peter M. Schlag ; Per-Ulf Tunn ; Janine Karle ; Veit Krenn ; Manfred Dietel ; Christine Sers

Source :

RBID : ISTEX:3DED41F38E4370408E0F64A502D887FC33CDB4AD

English descriptors

Abstract

Fritsche‐Guenther R, Noske A, Ungethüm U, Kuban R‐J, Schlag PM, Tunn P‐U, Karle J, Krenn V, Dietel M & Sers C (2010) Histopathology57, 836–850

Url:
DOI: 10.1111/j.1365-2559.2010.03713.x

Links to Exploration step

ISTEX:3DED41F38E4370408E0F64A502D887FC33CDB4AD

Le document en format XML

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<p>De novo expression of EphA2 in osteosarcoma modulates activation of the mitogenic signalling pathway</p>
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<p>Aims:  In osteosarcoma patients the development of metastases, often to the lungs, is the most frequent cause of death. The aim of this study was to elucidate the molecular mechanisms governing osteosarcoma development and dissemination and, thereby, to identify possible novel drug targets for improved treatment.</p>
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<p>Methods and results:  Osteosarcoma samples were characterized using genome‐wide microarrays: increased expression of the EphA2 receptor and its ligand EFNA1 was detected. In addition, increased expression of EFNB1, EFNB3 and EphA3 was suggested. Immunohistochemistry revealed an absence of EphA2 in normal bone, and de novo expression in osteosarcomas. EFNA1 was expressed in normal bone, but was significantly elevated in tumours. Further in vitro investigations on the functional role of EphA2 and EFNA1 showed that EFNA1 ligand binding induced increased tyrosine phoshorylation, receptor degradation and downstream mitogen‐activated protein kinase (MAPK) activation. Interference with the MAPK pathway unravelled a potential autoregulatory loop governing mainly EFNA1 expression via the same pathway.</p>
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<p>Conclusion:  Upregulation and de novo expression of ephrins in osteosarcomas are involved in oncogenic signalling and thus might stimulate osteosarcoma metastasis.</p>
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<personName>
<givenNames>Veit</givenNames>
<familyName>Krenn</familyName>
</personName>
</creator>
<creator creatorRole="author" xml:id="cr9" affiliationRef="#a1">
<personName>
<givenNames>Manfred</givenNames>
<familyName>Dietel</familyName>
</personName>
</creator>
<creator creatorRole="author" xml:id="cr10" affiliationRef="#a1">
<personName>
<givenNames>Christine</givenNames>
<familyName>Sers</familyName>
</personName>
</creator>
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<affiliation xml:id="a1" countryCode="DE">
<unparsedAffiliation>Institute of Pathology, Charitè Universitätsmedizin Berlin, Berlin, Germany</unparsedAffiliation>
</affiliation>
<affiliation xml:id="a2" countryCode="DE">
<unparsedAffiliation>Laboratory for Functional Genome Research, Charitè Universitätsmedizin Berlin, Berlin, Germany</unparsedAffiliation>
</affiliation>
<affiliation xml:id="a3" countryCode="DE">
<unparsedAffiliation>Robert‐Rössle‐Klinikum, Charitè Universitätsmedizin Berlin, Berlin, Germany</unparsedAffiliation>
</affiliation>
<affiliation xml:id="a4" countryCode="DE">
<unparsedAffiliation>Center for Histology, Cytology and Molecular Diagnostic, Wissenschaftspark Trier, Trier, Germany</unparsedAffiliation>
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<keyword xml:id="k1">EphA2</keyword>
<keyword xml:id="k2">EFNA1</keyword>
<keyword xml:id="k3">MAPK</keyword>
<keyword xml:id="k4">osteosarcoma</keyword>
</keywordGroup>
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<abstract type="main" xml:lang="en">
<p>Fritsche‐Guenther R, Noske A, Ungethüm U, Kuban R‐J, Schlag PM, Tunn P‐U, Karle J, Krenn V, Dietel M & Sers C (2010)
<i>Histopathology</i>
<b>57,</b>
836–850</p>
<p>
<b>
<i>De novo</i>
expression of EphA2 in osteosarcoma modulates activation of the mitogenic signalling pathway</b>
</p>
<p>
<b>Aims: </b>
In osteosarcoma patients the development of metastases, often to the lungs, is the most frequent cause of death. The aim of this study was to elucidate the molecular mechanisms governing osteosarcoma development and dissemination and, thereby, to identify possible novel drug targets for improved treatment.</p>
<p>
<b>Methods and results: </b>
Osteosarcoma samples were characterized using genome‐wide microarrays: increased expression of the
<i>EphA2</i>
receptor and its ligand
<i>EFNA1</i>
was detected. In addition, increased expression of
<i>EFNB1</i>
,
<i>EFNB3</i>
and
<i>EphA3</i>
was suggested. Immunohistochemistry revealed an absence of EphA2 in normal bone, and
<i>de novo</i>
expression in osteosarcomas. EFNA1 was expressed in normal bone, but was significantly elevated in tumours. Further
<i>in vitro</i>
investigations on the functional role of EphA2 and EFNA1 showed that EFNA1 ligand binding induced increased tyrosine phoshorylation, receptor degradation and downstream mitogen‐activated protein kinase (MAPK) activation. Interference with the MAPK pathway unravelled a potential autoregulatory loop governing mainly EFNA1 expression via the same pathway.</p>
<p>
<b>Conclusion: </b>
Upregulation and
<i>de novo</i>
expression of ephrins in osteosarcomas are involved in oncogenic signalling and thus might stimulate osteosarcoma metastasis.</p>
</abstract>
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<title>De novo expression of EphA2 in osteosarcoma modulates activation of the mitogenic signalling pathway</title>
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<title>Ephrin expression in osteosarcoma</title>
</titleInfo>
<titleInfo type="alternative" contentType="CDATA" lang="en">
<title>De novo expression of EphA2 in osteosarcoma modulates activation of the mitogenic signalling pathway</title>
</titleInfo>
<name type="personal">
<namePart type="given">Raphaela</namePart>
<namePart type="family">Fritsche‐Guenther</namePart>
<affiliation>Institute of Pathology, Charitè Universitätsmedizin Berlin, Berlin, Germany</affiliation>
<role>
<roleTerm type="text">author</roleTerm>
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<name type="personal">
<namePart type="given">Aurelia</namePart>
<namePart type="family">Noske</namePart>
<affiliation>Institute of Pathology, Charitè Universitätsmedizin Berlin, Berlin, Germany</affiliation>
<role>
<roleTerm type="text">author</roleTerm>
</role>
</name>
<name type="personal">
<namePart type="given">Ute</namePart>
<namePart type="family">Ungethüm</namePart>
<affiliation>Laboratory for Functional Genome Research, Charitè Universitätsmedizin Berlin, Berlin, Germany</affiliation>
<role>
<roleTerm type="text">author</roleTerm>
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<name type="personal">
<namePart type="given">Ralf‐Jürgen</namePart>
<namePart type="family">Kuban</namePart>
<affiliation>Laboratory for Functional Genome Research, Charitè Universitätsmedizin Berlin, Berlin, Germany</affiliation>
<role>
<roleTerm type="text">author</roleTerm>
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</name>
<name type="personal">
<namePart type="given">Peter M.</namePart>
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<affiliation>Robert‐Rössle‐Klinikum, Charitè Universitätsmedizin Berlin, Berlin, Germany</affiliation>
<role>
<roleTerm type="text">author</roleTerm>
</role>
</name>
<name type="personal">
<namePart type="given">Per‐Ulf</namePart>
<namePart type="family">Tunn</namePart>
<affiliation>Robert‐Rössle‐Klinikum, Charitè Universitätsmedizin Berlin, Berlin, Germany</affiliation>
<role>
<roleTerm type="text">author</roleTerm>
</role>
</name>
<name type="personal">
<namePart type="given">Janine</namePart>
<namePart type="family">Karle</namePart>
<affiliation>Institute of Pathology, Charitè Universitätsmedizin Berlin, Berlin, Germany</affiliation>
<role>
<roleTerm type="text">author</roleTerm>
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<name type="personal">
<namePart type="given">Veit</namePart>
<namePart type="family">Krenn</namePart>
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<role>
<roleTerm type="text">author</roleTerm>
</role>
</name>
<name type="personal">
<namePart type="given">Manfred</namePart>
<namePart type="family">Dietel</namePart>
<affiliation>Institute of Pathology, Charitè Universitätsmedizin Berlin, Berlin, Germany</affiliation>
<role>
<roleTerm type="text">author</roleTerm>
</role>
</name>
<name type="personal">
<namePart type="given">Christine</namePart>
<namePart type="family">Sers</namePart>
<affiliation>Institute of Pathology, Charitè Universitätsmedizin Berlin, Berlin, Germany</affiliation>
<role>
<roleTerm type="text">author</roleTerm>
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<place>
<placeTerm type="text">Oxford, UK</placeTerm>
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<dateIssued encoding="w3cdtf">2010-12</dateIssued>
<edition>Date of submission 5 August 2009 Accepted for publication 25 March 2010</edition>
<copyrightDate encoding="w3cdtf">2010</copyrightDate>
</originInfo>
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<extent unit="figures">7</extent>
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<abstract>Fritsche‐Guenther R, Noske A, Ungethüm U, Kuban R‐J, Schlag PM, Tunn P‐U, Karle J, Krenn V, Dietel M & Sers C (2010) Histopathology57, 836–850</abstract>
<abstract>De novo expression of EphA2 in osteosarcoma modulates activation of the mitogenic signalling pathway</abstract>
<abstract>Aims:  In osteosarcoma patients the development of metastases, often to the lungs, is the most frequent cause of death. The aim of this study was to elucidate the molecular mechanisms governing osteosarcoma development and dissemination and, thereby, to identify possible novel drug targets for improved treatment.</abstract>
<abstract>Methods and results:  Osteosarcoma samples were characterized using genome‐wide microarrays: increased expression of the EphA2 receptor and its ligand EFNA1 was detected. In addition, increased expression of EFNB1, EFNB3 and EphA3 was suggested. Immunohistochemistry revealed an absence of EphA2 in normal bone, and de novo expression in osteosarcomas. EFNA1 was expressed in normal bone, but was significantly elevated in tumours. Further in vitro investigations on the functional role of EphA2 and EFNA1 showed that EFNA1 ligand binding induced increased tyrosine phoshorylation, receptor degradation and downstream mitogen‐activated protein kinase (MAPK) activation. Interference with the MAPK pathway unravelled a potential autoregulatory loop governing mainly EFNA1 expression via the same pathway.</abstract>
<abstract>Conclusion:  Upregulation and de novo expression of ephrins in osteosarcomas are involved in oncogenic signalling and thus might stimulate osteosarcoma metastasis.</abstract>
<subject lang="en">
<genre>keywords</genre>
<topic>EphA2</topic>
<topic>EFNA1</topic>
<topic>MAPK</topic>
<topic>osteosarcoma</topic>
</subject>
<relatedItem type="host">
<titleInfo>
<title>Histopathology</title>
</titleInfo>
<genre type="journal">journal</genre>
<identifier type="ISSN">0309-0167</identifier>
<identifier type="eISSN">1365-2559</identifier>
<identifier type="DOI">10.1111/(ISSN)1365-2559</identifier>
<identifier type="PublisherID">HIS</identifier>
<part>
<date>2010</date>
<detail type="volume">
<caption>vol.</caption>
<number>57</number>
</detail>
<detail type="issue">
<caption>no.</caption>
<number>6</number>
</detail>
<extent unit="pages">
<start>836</start>
<end>850</end>
<total>15</total>
</extent>
</part>
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<identifier type="DOI">10.1111/j.1365-2559.2010.03713.x</identifier>
<identifier type="ArticleID">HIS3713</identifier>
<accessCondition type="use and reproduction" contentType="copyright">© 2010 Blackwell Publishing Limited</accessCondition>
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