Team:Evry/flush model

From 2013.igem.org

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A healthy person absorbs about 10% (2mg a day) of the daily iron uptake, while a hemochromatosic patient's absorption varies between 50% and 100% of the daily iron uptake<sup><a href="#Ref">[1]</a></sup>.
A healthy person absorbs about 10% (2mg a day) of the daily iron uptake, while a hemochromatosic patient's absorption varies between 50% and 100% of the daily iron uptake<sup><a href="#Ref">[1]</a></sup>.
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  <a title="Absorption" href="https://static.igem.org/mediawiki/2013/3/37/Regulation.png">
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    <img alt="Absorption" src="https://static.igem.org/mediawiki/2013/3/37/Regulation.png" class="Picture"/>
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    <b>Figure 1 : </b> Overview of the iron regulation system in human body.
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<p>
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Iron absorption is normally regulated by the liver through hepcidin production (depicted in <a href="#Fig1">Figure 1</a>). This means that after a certain delay, iron absorption eventually reaches a stationary phase.
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Once our genetically modified bacteria are released in the duodenum lumen, they produce siderophores to chelate the solved iron, thus making it unavailable for intestinal absorption. Then, <b>they eventually flush out of the duodenum</b>. The main hypothesis in this model is that the bacteria do not colonize the duodenum : they only flow through. They do not even have time to grow, for the time required to flush through is close to 40 seconds.<br/>
Once our genetically modified bacteria are released in the duodenum lumen, they produce siderophores to chelate the solved iron, thus making it unavailable for intestinal absorption. Then, <b>they eventually flush out of the duodenum</b>. The main hypothesis in this model is that the bacteria do not colonize the duodenum : they only flow through. They do not even have time to grow, for the time required to flush through is close to 40 seconds.<br/>
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Because some of the parameters remain unknown, it is a theoretical simulation which will <b>not</b> give any numerical results, only qualitative results.
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<h2>Goals</h2>
<h2>Goals</h2>
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We first wanted to build a generic duodenal iron absorption model, and
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<h2>Materials and Methods</h2>
<h2>Materials and Methods</h2>

Revision as of 17:42, 28 October 2013

Iron coli project

Flush model overview

Introduction

In the very beginning of the project, we focused on iron absorption by the duodenum. We first had to model the behaviour of the duodenum regarding iron absorption to determine if a flush treatment strategy was viable. Then we want to model the flush treatment by simulating a flush of iron-chelating bacteria.

Observations

We know that 60% of iron is absorbed in the duodenum and 40% in the jejunum. The duodenum is located in the upper intestines, right after the stomach, and is usually 300mm long.
A healthy person absorbs about 10% (2mg a day) of the daily iron uptake, while a hemochromatosic patient's absorption varies between 50% and 100% of the daily iron uptake[1].

Absorption
Figure 1 : Overview of the iron regulation system in human body.

Iron absorption is normally regulated by the liver through hepcidin production (depicted in Figure 1). This means that after a certain delay, iron absorption eventually reaches a stationary phase. Once our genetically modified bacteria are released in the duodenum lumen, they produce siderophores to chelate the solved iron, thus making it unavailable for intestinal absorption. Then, they eventually flush out of the duodenum. The main hypothesis in this model is that the bacteria do not colonize the duodenum : they only flow through. They do not even have time to grow, for the time required to flush through is close to 40 seconds.

Goals

We first wanted to build a generic duodenal iron absorption model, and

    Materials and Methods

    Model

    Results

    Conclusion

    Models and Scripts

    img1 img2 img3
    txt1 txt3

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