<?xml version="1.0" encoding="ISO-8859-1"?><cms:container xmlns:cms="http://edoc.hu-berlin.de/diml/module/cms"><cms:document><cms:meta><cms:entry id="front" part="front" ref="front" type="front"/><cms:entry type="title">Identifizierung neuer E2F-Zielgene in der Wachstumskontrolle und Tumorprogression</cms:entry><cms:entry type="author">Dipl. Biol. Caroline Schreiber</cms:entry><cms:entry ref="N100B3" type="preface">Zusammenfassung</cms:entry><cms:entry ref="N100BA" type="citenumber">1</cms:entry><cms:entry id="chapter1" part="chapter1" ref="chapter1" type="chapter">1</cms:entry><cms:entry id="N100DD" part="chapter1" ref="N100DD" type="citenumber">2</cms:entry><cms:entry id="N100E9" part="chapter1" ref="N100E9" type="section">1.1</cms:entry><cms:entry id="N10123" part="chapter1" ref="N10123" type="citenumber">3</cms:entry><cms:entry id="N10136" part="chapter1" ref="N10136" type="section">1.2</cms:entry><cms:entry id="N10176" part="chapter1" ref="N10176" type="citenumber">4</cms:entry><cms:entry id="N1019F" part="chapter1" ref="N1019F" type="mm">432#255</cms:entry><cms:entry id="N101AB" part="chapter1" ref="N101AB" type="subsection">1.2.1</cms:entry><cms:entry id="N101F1" part="chapter1" ref="N101F1" type="citenumber">5</cms:entry><cms:entry id="N1023F" part="chapter1" ref="N1023F" type="subsection">1.2.2</cms:entry><cms:entry id="N10273" part="chapter1" ref="N10273" type="citenumber">6</cms:entry><cms:entry id="N1029E" part="chapter1" ref="N1029E" type="mm">550#380</cms:entry><cms:entry id="N102BF" part="chapter1" ref="N102BF" type="citenumber">7</cms:entry><cms:entry id="N10322" part="chapter1" ref="N10322" type="mm">430#189</cms:entry><cms:entry id="N10334" part="chapter1" ref="N10334" type="subsection">1.2.3</cms:entry><cms:entry id="N1033B" part="chapter1" ref="N1033B" type="citenumber">8</cms:entry><cms:entry id="N1039B" part="chapter1" ref="N1039B" type="subsection">1.2.4</cms:entry><cms:entry id="N103E8" part="chapter1" ref="N103E8" type="subsection">1.2.5</cms:entry><cms:entry id="N103F5" part="chapter1" ref="N103F5" type="citenumber">9</cms:entry><cms:entry id="N104B3" part="chapter1" ref="N104B3" type="citenumber">10</cms:entry><cms:entry id="N10518" part="chapter1" ref="N10518" type="section">1.3</cms:entry><cms:entry id="N1054A" part="chapter1" ref="N1054A" type="citenumber">11</cms:entry><cms:entry id="N10587" part="chapter1" ref="N10587" type="mm">575#128</cms:entry><cms:entry id="N105D4" part="chapter1" ref="N105D4" type="citenumber">12</cms:entry><cms:entry id="N1061A" part="chapter1" ref="N1061A" type="section">1.4</cms:entry><cms:entry id="N1064C" part="chapter1" ref="N1064C" type="citenumber">13</cms:entry><cms:entry id="N1064F" part="chapter1" ref="N1064F" type="mm">434#313</cms:entry><cms:entry id="N106AB" part="chapter1" ref="N106AB" type="citenumber">14</cms:entry><cms:entry id="N106B3" part="chapter1" ref="N106B3" type="subsection">1.4.1</cms:entry><cms:entry id="N106C5" part="chapter1" ref="N106C5" type="mm">287#150</cms:entry><cms:entry id="N106D7" part="chapter1" ref="N106D7" type="block">1.4.1.1</cms:entry><cms:entry id="N106DE" part="chapter1" ref="N106DE" type="citenumber">15</cms:entry><cms:entry id="N1075D" part="chapter1" ref="N1075D" type="block">1.4.1.2</cms:entry><cms:entry id="N10764" part="chapter1" ref="N10764" type="citenumber">16</cms:entry><cms:entry id="N10791" part="chapter1" ref="N10791" type="block">1.4.1.3</cms:entry><cms:entry id="N107B0" part="chapter1" ref="N107B0" type="block">1.4.1.4</cms:entry><cms:entry id="N107C2" part="chapter1" ref="N107C2" type="citenumber">17</cms:entry><cms:entry id="N107E6" part="chapter1" ref="N107E6" type="subsection">1.4.2</cms:entry><cms:entry id="N10863" part="chapter1" ref="N10863" type="subsection">1.4.3</cms:entry><cms:entry id="N1086A" part="chapter1" ref="N1086A" type="citenumber">18</cms:entry><cms:entry id="N108A9" part="chapter1" ref="N108A9" type="citenumber">19</cms:entry><cms:entry id="N108B1" part="chapter1" ref="N108B1" type="section">1.5</cms:entry><cms:entry id="chapter2" part="chapter2" ref="chapter2" type="chapter">2</cms:entry><cms:entry id="N108DD" part="chapter2" ref="N108DD" type="section">2.1</cms:entry><cms:entry id="N108EA" part="chapter2" ref="N108EA" type="citenumber">20</cms:entry><cms:entry id="N10911" part="chapter2" ref="N10911" type="mm">512#384</cms:entry><cms:entry id="N1096A" part="chapter2" ref="N1096A" type="citenumber">21</cms:entry><cms:entry id="N1098D" part="chapter2" ref="N1098D" type="section">2.2</cms:entry><cms:entry id="N109C0" part="chapter2" ref="N109C0" type="citenumber">22</cms:entry><cms:entry id="N109C3" part="chapter2" ref="N109C3" type="mm">456#384</cms:entry><cms:entry id="N10A6F" part="chapter2" ref="N10A6F" type="section">2.3</cms:entry><cms:entry id="N10ABD" part="chapter2" ref="N10ABD" type="citenumber">23</cms:entry><cms:entry id="N10B15" part="chapter2" ref="N10B15" type="mm">459#538</cms:entry><cms:entry id="N10B6C" part="chapter2" ref="N10B6C" type="section">2.4</cms:entry><cms:entry id="N10B76" part="chapter2" ref="N10B76" type="citenumber">24</cms:entry><cms:entry id="N10B92" part="chapter2" ref="N10B92" type="mm">476#422</cms:entry><cms:entry id="N10C36" part="chapter2" ref="N10C36" type="citenumber">25</cms:entry><cms:entry id="N10C58" part="chapter2" ref="N10C58" type="section">2.5</cms:entry><cms:entry id="N10C69" part="chapter2" ref="N10C69" type="citenumber">26</cms:entry><cms:entry id="N10C9F" part="chapter2" ref="N10C9F" type="mm">434#384</cms:entry><cms:entry id="N10CCB" part="chapter2" ref="N10CCB" type="citenumber">27</cms:entry><cms:entry id="N10CDE" part="chapter2" ref="N10CDE" type="section">2.6</cms:entry><cms:entry id="N10CFD" part="chapter2" ref="N10CFD" type="citenumber">28</cms:entry><cms:entry id="N10D21" part="chapter2" ref="N10D21" type="mm">438#480</cms:entry><cms:entry id="N10DC2" part="chapter2" ref="N10DC2" type="citenumber">29</cms:entry><cms:entry id="N10DFB" part="chapter2" ref="N10DFB" type="citenumber">30</cms:entry><cms:entry id="N10E11" part="chapter2" ref="N10E11" type="mm">375#178</cms:entry><cms:entry id="N10E41" part="chapter2" ref="N10E41" type="section">2.7</cms:entry><cms:entry id="N10E48" part="chapter2" ref="N10E48" type="citenumber">31</cms:entry><cms:entry id="N10E94" part="chapter2" ref="N10E94" type="mm">559#353</cms:entry><cms:entry id="N10ED5" part="chapter2" ref="N10ED5" type="citenumber">32</cms:entry><cms:entry id="N10EF6" part="chapter2" ref="N10EF6" type="mm">555#309</cms:entry><cms:entry id="N10F13" part="chapter2" ref="N10F13" type="citenumber">33</cms:entry><cms:entry id="N10F1A" part="chapter2" ref="N10F1A" type="section">2.8</cms:entry><cms:entry id="N10F62" part="chapter2" ref="N10F62" type="citenumber">34</cms:entry><cms:entry id="N10FB5" part="chapter2" ref="N10FB5" type="mm">547#373</cms:entry><cms:entry id="N11020" part="chapter2" ref="N11020" type="citenumber">35</cms:entry><cms:entry id="N11039" part="chapter2" ref="N11039" type="section">2.9</cms:entry><cms:entry id="N1105B" part="chapter2" ref="N1105B" type="citenumber">36</cms:entry><cms:entry id="N11064" part="chapter2" ref="N11064" type="mm">387#672</cms:entry><cms:entry id="N1110E" part="chapter2" ref="N1110E" type="citenumber">37</cms:entry><cms:entry id="N11118" part="chapter2" ref="N11118" type="section">2.10</cms:entry><cms:entry id="N11137" part="chapter2" ref="N11137" type="subsection">2.10.1</cms:entry><cms:entry id="N1114A" part="chapter2" ref="N1114A" type="citenumber">38</cms:entry><cms:entry id="N11151" part="chapter2" ref="N11151" type="subsection">2.10.2</cms:entry><cms:entry id="N11167" part="chapter2" ref="N11167" type="mm">545#198</cms:entry><cms:entry id="N11175" part="chapter2" ref="N11175" type="citenumber">39</cms:entry><cms:entry id="N11178" part="chapter2" ref="N11178" type="table"/><cms:entry id="N11449" part="chapter2" ref="N11449" type="subsection">2.10.3</cms:entry><cms:entry id="N1145C" part="chapter2" ref="N1145C" type="citenumber">40</cms:entry><cms:entry id="N114AD" part="chapter2" ref="N114AD" type="mm">561#325</cms:entry><cms:entry id="N11504" part="chapter2" ref="N11504" type="subsection">2.10.4</cms:entry><cms:entry id="N11517" part="chapter2" ref="N11517" type="citenumber">41</cms:entry><cms:entry id="N11550" part="chapter2" ref="N11550" type="mm">575#307</cms:entry><cms:entry id="N115A6" part="chapter2" ref="N115A6" type="mm">572#308</cms:entry><cms:entry id="N115D2" part="chapter2" ref="N115D2" type="citenumber">42</cms:entry><cms:entry id="chapter3" part="chapter3" ref="chapter3" type="chapter">3</cms:entry><cms:entry id="N11606" part="chapter3" ref="N11606" type="helpercitenumber">42</cms:entry><cms:entry id="N11612" part="chapter3" ref="N11612" type="section">3.1</cms:entry><cms:entry id="N11619" part="chapter3" ref="N11619" type="citenumber">43</cms:entry><cms:entry id="N1168B" part="chapter3" ref="N1168B" type="section">3.2</cms:entry><cms:entry id="N116FE" part="chapter3" ref="N116FE" type="citenumber">44</cms:entry><cms:entry id="N1170B" part="chapter3" ref="N1170B" type="section">3.3</cms:entry><cms:entry id="N117C6" part="chapter3" ref="N117C6" type="citenumber">45</cms:entry><cms:entry id="N1181E" part="chapter3" ref="N1181E" type="section">3.4</cms:entry><cms:entry id="N11828" part="chapter3" ref="N11828" type="citenumber">46</cms:entry><cms:entry id="N11890" part="chapter3" ref="N11890" type="section">3.5</cms:entry><cms:entry id="N118AF" part="chapter3" ref="N118AF" type="citenumber">47</cms:entry><cms:entry id="N11906" part="chapter3" ref="N11906" type="citenumber">48</cms:entry><cms:entry id="N11924" part="chapter3" ref="N11924" type="section">3.6</cms:entry><cms:entry id="N1195F" part="chapter3" ref="N1195F" type="citenumber">49</cms:entry><cms:entry id="N1196F" part="chapter3" ref="N1196F" type="section">3.7</cms:entry><cms:entry id="N119B4" part="chapter3" ref="N119B4" type="citenumber">50</cms:entry><cms:entry id="N11A10" part="chapter3" ref="N11A10" type="citenumber">51</cms:entry><cms:entry id="N11A1F" part="chapter3" ref="N11A1F" type="mm">427#247</cms:entry><cms:entry id="chapter4" part="chapter4" ref="chapter4" type="chapter">4</cms:entry><cms:entry id="N11A40" part="chapter4" ref="N11A40" type="section">4.1</cms:entry><cms:entry id="N11A45" part="chapter4" ref="N11A45" type="subsection">4.1.1</cms:entry><cms:entry id="N11A4A" part="chapter4" ref="N11A4A" type="helpercitenumber">51</cms:entry><cms:entry id="N11A50" part="chapter4" ref="N11A50" type="subsection">4.1.2</cms:entry><cms:entry id="N11A57" part="chapter4" ref="N11A57" type="citenumber">52</cms:entry><cms:entry id="N11A5D" part="chapter4" ref="N11A5D" type="table"/><cms:entry id="N11F95" part="chapter4" ref="N11F95" type="subsection">4.1.3</cms:entry><cms:entry id="N11F9C" part="chapter4" ref="N11F9C" type="table"/><cms:entry id="N123A0" part="chapter4" ref="N123A0" type="subsection">4.1.4</cms:entry><cms:entry id="N123A7" part="chapter4" ref="N123A7" type="citenumber">53</cms:entry><cms:entry id="N123AA" part="chapter4" ref="N123AA" type="table"/><cms:entry id="N1248E" part="chapter4" ref="N1248E" type="section">4.2</cms:entry><cms:entry id="N124A4" part="chapter4" ref="N124A4" type="subsection">4.2.1</cms:entry><cms:entry id="N124B8" part="chapter4" ref="N124B8" type="subsection">4.2.2</cms:entry><cms:entry id="N124BF" part="chapter4" ref="N124BF" type="citenumber">54</cms:entry><cms:entry id="N124F3" part="chapter4" ref="N124F3" type="subsection">4.2.3</cms:entry><cms:entry id="N12500" part="chapter4" ref="N12500" type="citenumber">55</cms:entry><cms:entry id="N12510" part="chapter4" ref="N12510" type="subsection">4.2.4</cms:entry><cms:entry id="N12520" part="chapter4" ref="N12520" type="citenumber">56</cms:entry><cms:entry id="N12538" part="chapter4" ref="N12538" type="citenumber">57</cms:entry><cms:entry id="N12542" part="chapter4" ref="N12542" type="subsection">4.2.5</cms:entry><cms:entry id="N1254D" part="chapter4" ref="N1254D" type="subsection">4.2.6</cms:entry><cms:entry id="N1255D" part="chapter4" ref="N1255D" type="citenumber">58</cms:entry><cms:entry id="N12572" part="chapter4" ref="N12572" type="citenumber">59</cms:entry><cms:entry id="N12589" part="chapter4" ref="N12589" type="section">4.3</cms:entry><cms:entry id="N1258E" part="chapter4" ref="N1258E" type="subsection">4.3.1</cms:entry><cms:entry id="N12599" part="chapter4" ref="N12599" type="subsection">4.3.2</cms:entry><cms:entry id="N125A0" part="chapter4" ref="N125A0" type="citenumber">60</cms:entry><cms:entry id="N125A7" part="chapter4" ref="N125A7" type="subsection">4.3.3</cms:entry><cms:entry id="N125BB" part="chapter4" ref="N125BB" type="subsection">4.3.4</cms:entry><cms:entry id="N125C8" part="chapter4" ref="N125C8" type="section">4.4</cms:entry><cms:entry id="N125CD" part="chapter4" ref="N125CD" type="subsection">4.4.1</cms:entry><cms:entry id="N125D4" part="chapter4" ref="N125D4" type="citenumber">61</cms:entry><cms:entry id="N125DE" part="chapter4" ref="N125DE" type="subsection">4.4.2</cms:entry><cms:entry id="N125EF" part="chapter4" ref="N125EF" type="subsection">4.4.3</cms:entry><cms:entry id="N12606" part="chapter4" ref="N12606" type="subsection">4.4.4</cms:entry><cms:entry id="N12610" part="chapter4" ref="N12610" type="citenumber">62</cms:entry><cms:entry id="N12620" part="chapter4" ref="N12620" type="subsection">4.4.5</cms:entry><cms:entry id="N1262E" part="chapter4" ref="N1262E" type="subsection">4.4.6</cms:entry><cms:entry id="N12638" part="chapter4" ref="N12638" type="citenumber">63</cms:entry><cms:entry id="N12645" part="chapter4" ref="N12645" type="subsection">4.4.7</cms:entry><cms:entry id="N12653" part="chapter4" ref="N12653" type="subsection">4.4.8</cms:entry><cms:entry id="N12661" part="chapter4" ref="N12661" type="subsection">4.4.9</cms:entry><cms:entry id="N12668" part="chapter4" ref="N12668" type="citenumber">64</cms:entry><cms:entry id="N12681" part="chapter4" ref="N12681" type="subsection">4.4.10</cms:entry><cms:entry id="N12695" part="chapter4" ref="N12695" type="subsection">4.4.11</cms:entry><cms:entry id="N1269C" part="chapter4" ref="N1269C" type="citenumber">65</cms:entry><cms:entry ref="N126B8" type="back"/><cms:entry id="N126BA" part="N126BA" ref="N126BA" type="appendix">Anhang</cms:entry><cms:entry id="N126BC" part="N126BA" ref="N126BC" type="head"/><cms:entry id="N126BF" part="N126BA" ref="N126BF" type="p"/><cms:entry id="N126C1" part="N126BA" ref="N126C1" type="table"/><cms:entry id="N14263" part="N126BA" ref="N14263" type="p"/><cms:entry id="N14266" part="N126BA" ref="N14266" type="p"/><cms:entry id="N14269" part="N126BA" ref="N14269" type="p"/><cms:entry id="N1426C" part="N126BA" ref="N1426C" type="p"/><cms:entry id="N1426F" part="N126BA" ref="N1426F" type="p"/><cms:entry id="N14271" part="N126BA" ref="N14271" type="table"/><cms:entry id="N15BC9" part="N126BA" ref="N15BC9" type="p"/><cms:entry id="N15BCC" part="N126BA" ref="N15BCC" type="p"/><cms:entry id="N15BCF" part="N126BA" ref="N15BCF" type="p"/><cms:entry id="N15BD2" part="N126BA" ref="N15BD2" type="p"/><cms:entry id="N15BD5" part="N126BA" ref="N15BD5" type="p"/><cms:entry id="N15BD8" part="N15BD8" ref="N15BD8" type="abbreviation">Abkürzungsverzeichnis</cms:entry><cms:entry 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type="appendix">Publikationsliste</cms:entry><cms:entry id="N1914F" part="N1914D" ref="N1914F" type="head"/><cms:entry id="N19152" part="N1914D" ref="N19152" type="p"/><cms:entry id="N19158" part="N1914D" ref="N19158" type="p"/><cms:entry id="N1915E" part="N1914D" ref="N1915E" type="p"/><cms:entry id="N19164" part="N1914D" ref="N19164" type="p"/><cms:entry id="N1916A" part="N1914D" ref="N1916A" type="p"/><cms:entry id="N19170" part="N1914D" ref="N19170" type="p"/><cms:entry id="N19176" part="N1914D" ref="N19176" type="p"/><cms:entry id="N1917C" part="N1914D" ref="N1917C" type="p"/><cms:entry id="N19182" part="N1914D" ref="N19182" type="p"/><cms:entry id="N1918B" part="N1914D" ref="N1918B" type="p"/><cms:entry part="N100B3" type=":current"/><cms:entry type=":lang">de</cms:entry><cms:entry id=":contents" part="front" ref=":contents" type=":contents">Inhaltsverzeichnis</cms:entry><cms:entry type=":help"><url href="http://...">Hilfe</url></cms:entry></cms:meta><cms:content><preface id="N100B3">
         <head>Zusammenfassung</head>
         <p>
            <citenumber id="N100BA" start="1"/>Der pRB/E2F-Signalweg ist ein wichtiger Schlüsselpunkt für die Wachstumskontrolle in Säugerzellen und in vielen Tumoren sind Komponenten des Signalwegs dereguliert. E2F3, als einer der Schlüsselpartner von pRB, spielt eine wichtige Rolle bei der Wachstumskontrolle und Tumorprogression. Durch die Nullmutation von E2F3 in Mausembryonalen Fibroblasten (MEFs) und Mäusen konnte gezeigt werden, dass E2F3 essentiell für das zelluläre Wachstum ist und in der Maus organspezifisch sowohl als Tumorsuppressor als auch Onkogen agieren kann. Jedoch sind dafür die zugrunde liegenden Mechanismen noch nicht genau geklärt. Möglicherweise tragen verschiedene Signalwege, die durch den Verlust von E2F3 dereguliert werden, zu den Defekten bei. Der TGF&#946;1-Signalweg ist ein wichtiger Regulator des Zellwachstums und ebenfalls in vielen Tumoren mutiert. TGF&#946;1 selbst hat sowohl tumorsuppressive als auch tumorprogressive Eigenschaften, wobei verschiedene Faktoren beeinflussen können, wie sich die TGF&#946;1-Aktivität auf die Tumorentwicklung auswirkt.</p>
         <p>In dieser Arbeit wurde zum ersten Mal eine direkte Verbindung zwischen E2F3-Expression und TGF&#946;1-Signalwirkung untersucht und es konnte gezeigt werden, dass sich E2F3 und TGF&#946;1 gegenseitig beeinflussen können. Durch den Verlust von E2F3 werden <em>Tgfb1</em> und die TGF&#946;1-regulierten Gene <em>PAI-1</em>, <em>p21</em>, <em>Vimentin</em> und <em>Fibronectin</em> in MEFs dereprimiert. Darüber hinaus werden MEFs und humane Lungenkarzinomzellen durch den Verlust von E2F3 gegenüber TGF&#946;1 sensibilisiert und reagieren verstärkt auf TGF&#946;1-induzierte Prozesse wie Wachstumsarrest, EMT und Genexpression. Somit wird E2F3 nicht nur durch TGF&#946;1 reguliert, sondern kann damit auch auf TGF&#946;1 und die TGF&#946;1-Signalwirkung Einfluss nehmen, was für die Tumorprogression weit reichende Auswirkung haben kann. </p>
         <p>Im Hinblick auf die tumorsuppressiven Eigenschaften von E2F3 konnte durch den Vergleich von murinen medullären Schilddrüsentumoren mit unterschiedlichem metastatischem Potential neue E2F-Zielgene identifiziert werden. Analysen von humanen Struma nodosa-Biopsien und metastatischen medullären Schilddrüsentumoren ergaben, dass die in den Mäusen gefundenen Gene künftig auch als humane Metastasemarker Verwendung finden können.</p>
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