Location: Brightman, Fell, 2000 @ ae78ca0381b5 / brightman_fell_2000.cellml

Author:
Hanne <Hanne@hanne-nielsens-macbook.local>
Date:
2009-11-27 14:59:58+13:00
Desc:
Added image in ai format
Permanent Source URI:
https://models.physiomeproject.org/workspace/brightman_fell_2000/rawfile/ae78ca0381b585af01e7ee273cbecf9cf7d27f02/brightman_fell_2000.cellml

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This CellML file was generated on 10/07/2009 at 10:18:19 at a.m. using:

COR (0.9.31.1207)
Copyright 2002-2009 Dr Alan Garny
http://COR.physiol.ox.ac.uk/ - COR@physiol.ox.ac.uk

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http://www.CellML.org/
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				<title>Differential Feedback Regulation of the MAPK Cascade Underlies the
Quantitative Differences in EGF and NGF Signalling in PC12 Cells</title>
				<author>
					<firstname>Jeelean</firstname>
					<surname>Lim</surname>
					<affiliation>
						<shortaffil>Bioengineering Institute, University of Auckland</shortaffil>
					</affiliation>
				</author>
			</articleinfo>
			<section id="sec_status">
				<title>Model Status</title>
				<para>
            This is the initial translation of the model into CellML. Concentrations have no dimensions in order to balance units. The percentage activation variables used to produce the graphs in the paper have not yet been added to this model. The model can therefore run in Opencell and COR but does not reproduce the figures in the paper.
          </para>
			</section>
			<sect1 id="sec_structure">
				<title>Model Structure</title>
				<para>
ABSTRACT: Although epidermal growth factor (EGF) induces transient activation of Ras and the mitogen-activated protein kinase (MAPK) cascade in PC12 cells, whereas nerve growth factor (NGF) stimulates sustained activation, the basis for these contrasting responses is not known. We have developed a computer simulation of EGF-induced MAPK cascade activation, which provides quantitative evidence that feedback inhibition of the MAPK cascade is the most important factor in determining the duration of cascade activation. Hence, we propose that the observed quantitative differences in EGF and NGF signalling can be accounted for by differential feedback regulation of the MAPK cascade.
</para>
				
				<para>
The complete original paper reference is cited below:
</para>
				<para>
					Differential feedback regulation of the MAPK cascade underlies the quantitative differences in EGF and NGF signalling in PC12 cells, Frances A. Brightman, David A. Fell, 2000,<emphasis>Federation of European Biochemical Societies Letters</emphasis>, 482(3), 169-174.  <ulink url="http://www.ncbi.nlm.nih.gov/pubmed/11024454">PubMed ID: 11024454</ulink>
				</para>
				
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								<title>reaction diagram</title>
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					<caption>Schematic representation of the computer simulation of EGF signal transduction.</caption>
				</informalfigure>
			</sect1>
		</article>
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      <variable name="MEKP" units="dimensionless" public_interface="in"/>
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      <variable name="K_20" units="dimensionless" initial_value="600000"/>
      <math xmlns="http://www.w3.org/1998/Math/MathML">
         <apply>
            <eq/>
            <ci>v20</ci>
            <apply>
               <divide/>
               <apply>
                  <times/>
                  <ci>V_20</ci>
                  <ci>MEKP</ci>
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                  <plus/>
                  <ci>K_20</ci>
                  <ci>MEKP</ci>
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            </apply>
         </apply>
      </math>
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   <component name="v21">
      <variable name="v21" units="first_order_rate_constant" public_interface="out"/>
      <variable name="Rafa" units="dimensionless" public_interface="in"/>
      <variable name="MEKP" units="dimensionless" public_interface="in"/>
      <variable name="k21" units="first_order_rate_constant" initial_value="50"/>
      <variable name="K_21" units="dimensionless" initial_value="9000"/>
      <math xmlns="http://www.w3.org/1998/Math/MathML">
         <apply>
            <eq/>
            <ci>v21</ci>
            <apply>
               <divide/>
               <apply>
                  <times/>
                  <ci>Rafa</ci>
                  <ci>MEKP</ci>
                  <ci>k21</ci>
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               <apply>
                  <plus/>
                  <ci>K_21</ci>
                  <ci>MEKP</ci>
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            </apply>
         </apply>
      </math>
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   <component name="v22">
      <variable name="v22" units="first_order_rate_constant" public_interface="out"/>
      <variable name="MEKPP" units="dimensionless" public_interface="in"/>
      <variable name="V_22" units="first_order_rate_constant" initial_value="920000"/>
      <variable name="K_22" units="dimensionless" initial_value="600000"/>
      <math xmlns="http://www.w3.org/1998/Math/MathML">
         <apply>
            <eq/>
            <ci>v22</ci>
            <apply>
               <divide/>
               <apply>
                  <times/>
                  <ci>V_22</ci>
                  <ci>MEKPP</ci>
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               <apply>
                  <plus/>
                  <ci>K_22</ci>
                  <ci>MEKPP</ci>
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            </apply>
         </apply>
      </math>
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   <component name="v23">
      <variable name="v23" units="first_order_rate_constant" public_interface="out"/>
      <variable name="ERK" units="dimensionless" public_interface="in"/>
      <variable name="MEKP" units="dimensionless" public_interface="in"/>
      <variable name="MEKPP" units="dimensionless" public_interface="in"/>
      <variable name="k23" units="first_order_rate_constant" initial_value="8.3"/>
      <variable name="K_23" units="dimensionless" initial_value="90000"/>
      <math xmlns="http://www.w3.org/1998/Math/MathML">
         <apply>
            <eq/>
            <ci>v23</ci>
            <apply>
               <divide/>
               <apply>
                  <times/>
                  <ci>k23</ci>
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                     <plus/>
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               <apply>
                  <plus/>
                  <ci>K_23</ci>
                  <ci>ERK</ci>
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      </math>
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   <component name="v24">
      <variable name="v24" units="first_order_rate_constant" public_interface="out"/>
      <variable name="ERKP" units="dimensionless" public_interface="in"/>
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      <variable name="K_24" units="dimensionless" initial_value="600000"/>
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            <eq/>
            <ci>v24</ci>
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               <divide/>
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                  <times/>
                  <ci>V_24</ci>
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                  <plus/>
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   <component name="v25">
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      <variable name="ERKP" units="dimensionless" public_interface="in"/>
      <variable name="MEKP" units="dimensionless" public_interface="in"/>
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      <math xmlns="http://www.w3.org/1998/Math/MathML">
         <apply>
            <eq/>
            <ci>v25</ci>
            <apply>
               <divide/>
               <apply>
                  <times/>
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                     <plus/>
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                  <plus/>
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                  <ci>ERKP</ci>
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            <eq/>
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               <divide/>
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                  <times/>
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                  <plus/>
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               <divide/>
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                  <times/>
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               <divide/>
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               <times/>
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        The Brightman, Fell Model of Differential Feedback Regulation of the MAPK Cascade Underlying the Quantitative Differences in EGF and NGF Signalling in PC12 Cells
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      <!-- A comment regarding the model. -->
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        <rdf:value>
          This is the CellML description of Brightman and Fell's model of differential feedback regulation of the MAPK cascade underlying the quantitative differences in EGF and NGF signalling in PC12 cells  
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        <!-- The creator of the comment. -->
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            Differential feedback regulation of the MAPK cascade underlies the quantitative differences in EGF and NGF signalling in PC12 cells.
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            <dc:title>Federation of European Biochemical Societies Letters</dc:title>
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