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Mutation of Threonine 34 in Mouse Podoplanin-Fc Reduces CLEC-2 Binding and Toxicity in Vivo While Retaining Anti-lymphangiogenic Activity*

Identifieur interne : 002E94 ( Pmc/Corpus ); précédent : 002E93; suivant : 002E95

Mutation of Threonine 34 in Mouse Podoplanin-Fc Reduces CLEC-2 Binding and Toxicity in Vivo While Retaining Anti-lymphangiogenic Activity*

Auteurs : Roberta Bianchi ; Eliane Fischer ; Don Yuen ; Ellen Ernst ; Alexandra M. Ochsenbein ; Lu Chen ; Vivianne I. Otto ; Michael Detmar

Source :

RBID : PMC:4110307

Abstract

Background: Podoplanin-Fc inhibits lymphangiogenesis, but also causes a bleeding disorder by binding to CLEC-2 expressed on platelets.

Results: Mutation of threonine 34 in mouse Pdpn-Fc reduces 30-fold the binding to CLEC-2 and does not hamper its anti-lymphangiogenic activity.

Conclusion: PdpnT34A-Fc is an active lymphangiogenesis inhibitor with a better tolerability.

Significance: Mutagenesis of Pdpn-Fc is a valid approach to improve this tool for anti-lymphangiogenic therapy.


Url:
DOI: 10.1074/jbc.M114.550525
PubMed: 24907275
PubMed Central: 4110307

Links to Exploration step

PMC:4110307

Le document en format XML

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<title xml:lang="en">Mutation of Threonine 34 in Mouse Podoplanin-Fc Reduces CLEC-2 Binding and Toxicity
<italic>in Vivo</italic>
While Retaining Anti-lymphangiogenic Activity
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<name sortKey="Bianchi, Roberta" sort="Bianchi, Roberta" uniqKey="Bianchi R" first="Roberta" last="Bianchi">Roberta Bianchi</name>
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<name sortKey="Fischer, Eliane" sort="Fischer, Eliane" uniqKey="Fischer E" first="Eliane" last="Fischer">Eliane Fischer</name>
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<name sortKey="Yuen, Don" sort="Yuen, Don" uniqKey="Yuen D" first="Don" last="Yuen">Don Yuen</name>
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<name sortKey="Ochsenbein, Alexandra M" sort="Ochsenbein, Alexandra M" uniqKey="Ochsenbein A" first="Alexandra M." last="Ochsenbein">Alexandra M. Ochsenbein</name>
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<name sortKey="Chen, Lu" sort="Chen, Lu" uniqKey="Chen L" first="Lu" last="Chen">Lu Chen</name>
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<name sortKey="Otto, Vivianne I" sort="Otto, Vivianne I" uniqKey="Otto V" first="Vivianne I." last="Otto">Vivianne I. Otto</name>
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<name sortKey="Detmar, Michael" sort="Detmar, Michael" uniqKey="Detmar M" first="Michael" last="Detmar">Michael Detmar</name>
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<title xml:lang="en" level="a" type="main">Mutation of Threonine 34 in Mouse Podoplanin-Fc Reduces CLEC-2 Binding and Toxicity
<italic>in Vivo</italic>
While Retaining Anti-lymphangiogenic Activity
<xref ref-type="fn" rid="FN1">*</xref>
</title>
<author>
<name sortKey="Bianchi, Roberta" sort="Bianchi, Roberta" uniqKey="Bianchi R" first="Roberta" last="Bianchi">Roberta Bianchi</name>
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<name sortKey="Fischer, Eliane" sort="Fischer, Eliane" uniqKey="Fischer E" first="Eliane" last="Fischer">Eliane Fischer</name>
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<name sortKey="Yuen, Don" sort="Yuen, Don" uniqKey="Yuen D" first="Don" last="Yuen">Don Yuen</name>
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<name sortKey="Ernst, Ellen" sort="Ernst, Ellen" uniqKey="Ernst E" first="Ellen" last="Ernst">Ellen Ernst</name>
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<author>
<name sortKey="Ochsenbein, Alexandra M" sort="Ochsenbein, Alexandra M" uniqKey="Ochsenbein A" first="Alexandra M." last="Ochsenbein">Alexandra M. Ochsenbein</name>
<affiliation>
<nlm:aff id="aff1"></nlm:aff>
</affiliation>
</author>
<author>
<name sortKey="Chen, Lu" sort="Chen, Lu" uniqKey="Chen L" first="Lu" last="Chen">Lu Chen</name>
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<nlm:aff id="aff3"></nlm:aff>
</affiliation>
</author>
<author>
<name sortKey="Otto, Vivianne I" sort="Otto, Vivianne I" uniqKey="Otto V" first="Vivianne I." last="Otto">Vivianne I. Otto</name>
<affiliation>
<nlm:aff id="aff1"></nlm:aff>
</affiliation>
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<author>
<name sortKey="Detmar, Michael" sort="Detmar, Michael" uniqKey="Detmar M" first="Michael" last="Detmar">Michael Detmar</name>
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<series>
<title level="j">The Journal of Biological Chemistry</title>
<idno type="ISSN">0021-9258</idno>
<idno type="eISSN">1083-351X</idno>
<imprint>
<date when="2014">2014</date>
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<div type="abstract" xml:lang="en">
<p>
<bold>Background:</bold>
Podoplanin-Fc inhibits lymphangiogenesis, but also causes a bleeding disorder by binding to CLEC-2 expressed on platelets.</p>
<p>
<bold>Results:</bold>
Mutation of threonine 34 in mouse Pdpn-Fc reduces 30-fold the binding to CLEC-2 and does not hamper its anti-lymphangiogenic activity.</p>
<p>
<bold>Conclusion:</bold>
PdpnT34A-Fc is an active lymphangiogenesis inhibitor with a better tolerability.</p>
<p>
<bold>Significance:</bold>
Mutagenesis of Pdpn-Fc is a valid approach to improve this tool for anti-lymphangiogenic therapy.</p>
</div>
</front>
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<pmc article-type="research-article">
<pmc-comment>The publisher of this article does not allow downloading of the full text in XML form.</pmc-comment>
<front>
<journal-meta>
<journal-id journal-id-type="nlm-ta">J Biol Chem</journal-id>
<journal-id journal-id-type="iso-abbrev">J. Biol. Chem</journal-id>
<journal-id journal-id-type="hwp">jbc</journal-id>
<journal-id journal-id-type="pmc">jbc</journal-id>
<journal-id journal-id-type="publisher-id">JBC</journal-id>
<journal-title-group>
<journal-title>The Journal of Biological Chemistry</journal-title>
</journal-title-group>
<issn pub-type="ppub">0021-9258</issn>
<issn pub-type="epub">1083-351X</issn>
<publisher>
<publisher-name>American Society for Biochemistry and Molecular Biology</publisher-name>
<publisher-loc>9650 Rockville Pike, Bethesda, MD 20814, U.S.A.</publisher-loc>
</publisher>
</journal-meta>
<article-meta>
<article-id pub-id-type="pmid">24907275</article-id>
<article-id pub-id-type="pmc">4110307</article-id>
<article-id pub-id-type="publisher-id">M114.550525</article-id>
<article-id pub-id-type="doi">10.1074/jbc.M114.550525</article-id>
<article-categories>
<subj-group subj-group-type="heading">
<subject>Cell Biology</subject>
</subj-group>
</article-categories>
<title-group>
<article-title>Mutation of Threonine 34 in Mouse Podoplanin-Fc Reduces CLEC-2 Binding and Toxicity
<italic>in Vivo</italic>
While Retaining Anti-lymphangiogenic Activity
<xref ref-type="fn" rid="FN1">*</xref>
</article-title>
<alt-title alt-title-type="short">mPdpnT34A-Fc as an Improved Lymphangiogenesis Inhibitor</alt-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname>Bianchi</surname>
<given-names>Roberta</given-names>
</name>
<xref ref-type="aff" rid="aff1">
<sup></sup>
</xref>
</contrib>
<contrib contrib-type="author">
<name>
<surname>Fischer</surname>
<given-names>Eliane</given-names>
</name>
<xref ref-type="aff" rid="aff2">
<sup>§</sup>
</xref>
</contrib>
<contrib contrib-type="author">
<name>
<surname>Yuen</surname>
<given-names>Don</given-names>
</name>
<xref ref-type="aff" rid="aff3">
<sup></sup>
</xref>
</contrib>
<contrib contrib-type="author">
<name>
<surname>Ernst</surname>
<given-names>Ellen</given-names>
</name>
<xref ref-type="aff" rid="aff1">
<sup></sup>
</xref>
</contrib>
<contrib contrib-type="author">
<name>
<surname>Ochsenbein</surname>
<given-names>Alexandra M.</given-names>
</name>
<xref ref-type="aff" rid="aff1">
<sup></sup>
</xref>
</contrib>
<contrib contrib-type="author">
<name>
<surname>Chen</surname>
<given-names>Lu</given-names>
</name>
<xref ref-type="aff" rid="aff3">
<sup></sup>
</xref>
</contrib>
<contrib contrib-type="author">
<name>
<surname>Otto</surname>
<given-names>Vivianne I.</given-names>
</name>
<xref ref-type="aff" rid="aff1">
<sup></sup>
</xref>
</contrib>
<contrib contrib-type="author">
<name>
<surname>Detmar</surname>
<given-names>Michael</given-names>
</name>
<xref ref-type="aff" rid="aff1">
<sup></sup>
</xref>
<xref ref-type="corresp" rid="cor1">
<sup>1</sup>
</xref>
</contrib>
<aff id="aff1">From the
<label></label>
Institute of Pharmaceutical Sciences, ETH Zurich, 8093 Zurich, Switzerland,</aff>
<aff id="aff2">the
<label>§</label>
Center for Radiopharmaceutical Sciences, Paul Scherrer Institute PSI, 5232 Villigen, Switzerland, and</aff>
<aff id="aff3">the
<label></label>
Center for Eye Disease and Development, Program in Vision Science and School of Optometry, University of California at Berkeley, Berkeley, California 94720</aff>
</contrib-group>
<author-notes>
<corresp id="cor1">
<label>1</label>
To whom correspondence should be addressed:
<addr-line>ETH Zurich, Vladimir-Prelog-Weg 3, HCI H303, CH-8093 Zurich, Switzerland.</addr-line>
Tel.:
<phone>41-44-633-7361</phone>
; Fax:
<fax>41-44-633-1364</fax>
; E-mail:
<email>michael.detmar@pharma.ethz.ch</email>
.</corresp>
</author-notes>
<pub-date pub-type="ppub">
<day>25</day>
<month>7</month>
<year>2014</year>
</pub-date>
<pub-date pub-type="epub">
<day>6</day>
<month>6</month>
<year>2014</year>
</pub-date>
<volume>289</volume>
<issue>30</issue>
<fpage>21016</fpage>
<lpage>21027</lpage>
<history>
<date date-type="received">
<day>15</day>
<month>1</month>
<year>2014</year>
</date>
<date date-type="rev-recd">
<day>20</day>
<month>5</month>
<year>2014</year>
</date>
</history>
<permissions>
<copyright-statement>© 2014 by The American Society for Biochemistry and Molecular Biology, Inc.</copyright-statement>
<copyright-year>2014</copyright-year>
</permissions>
<self-uri xlink:title="pdf" xlink:type="simple" xlink:href="zbc03014021016.pdf"></self-uri>
<abstract abstract-type="teaser">
<p>
<bold>Background:</bold>
Podoplanin-Fc inhibits lymphangiogenesis, but also causes a bleeding disorder by binding to CLEC-2 expressed on platelets.</p>
<p>
<bold>Results:</bold>
Mutation of threonine 34 in mouse Pdpn-Fc reduces 30-fold the binding to CLEC-2 and does not hamper its anti-lymphangiogenic activity.</p>
<p>
<bold>Conclusion:</bold>
PdpnT34A-Fc is an active lymphangiogenesis inhibitor with a better tolerability.</p>
<p>
<bold>Significance:</bold>
Mutagenesis of Pdpn-Fc is a valid approach to improve this tool for anti-lymphangiogenic therapy.</p>
</abstract>
<abstract>
<p>The lymphatic system plays an important role in cancer metastasis and inhibition of lymphangiogenesis could be valuable in fighting cancer dissemination. Podoplanin (Pdpn) is a small, transmembrane glycoprotein expressed on the surface of lymphatic endothelial cells (LEC). During mouse development, binding of Pdpn to the C-type lectin-like receptor 2 (CLEC-2) on platelets is critical for the separation of the lymphatic and blood vascular systems. Competitive inhibition of Pdpn functions with a soluble form of the protein, Pdpn-Fc, leads to reduced lymphangiogenesis
<italic>in vitro</italic>
and
<italic>in vivo</italic>
. However, the transgenic overexpression of human Pdpn-Fc in mouse skin causes disseminated intravascular coagulation due to platelet activation via CLEC-2. In the present study, we produced and characterized a mutant form of mouse Pdpn-Fc, in which threonine 34, which is considered essential for CLEC-2 binding, was mutated to alanine (PdpnT34A-Fc). Indeed, PdpnT34A-Fc displayed a 30-fold reduced binding affinity for CLEC-2 compared with Pdpn-Fc. This also translated into fewer side effects due to platelet activation
<italic>in vivo</italic>
. Mice showed less prolonged bleeding time and fewer embolized vessels in the liver, when PdpnT34A-Fc was injected intravenously. However, PdpnT34A-Fc was still as active as wild-type Pdpn-Fc in inhibiting lymphangiogenesis
<italic>in vitro</italic>
and also inhibited lymphangiogenesis
<italic>in vivo</italic>
. These data suggest that the function of Pdpn in lymphangiogenesis does not depend on threonine 34 in the CLEC-2 binding domain and that PdpnT34A-Fc might be an improved inhibitor of lymphangiogenesis with fewer toxic side effects.</p>
</abstract>
<kwd-group>
<kwd>Glycosylation</kwd>
<kwd>Lymphangiogenesis</kwd>
<kwd>Mutagenesis</kwd>
<kwd>Platelet</kwd>
<kwd>Recombinant Protein Expression</kwd>
<kwd>CLEC-2</kwd>
<kwd>Podoplanin</kwd>
</kwd-group>
<funding-group>
<award-group>
<funding-source id="CS100">National Institutes of Health</funding-source>
<award-id rid="CS100">31003A-130627</award-id>
</award-group>
</funding-group>
</article-meta>
</front>
</pmc>
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