Team:Arizona State

From 2012.igem.org

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<h1>Project Overview</h1>
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<b> Diarrheic pathogens </b>  account for approximately <b>  1.5 million annual deaths </b> worldwide. Most of these incidents occur in third-world countries. Unfortunately, there are currently no biosensors available that can detect for these pathogens in a fast, cheap, and efficient manner. As such, Arizona State University’s 2012 iGEM team aims to develop a water-borne pathogen <b> biosensor</b>  that is<b>  cheap, portable, robust, easily customizable, and produces a quick response</b>. Our vision is to build a user-friendly device that does not require any technical expertise to operate.
 
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<div class="figText">Figure 1: Biosensor Production Pipeline</div>
 
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<h1>Abstract</h1>
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Diarrheic pathogens including <i>E.coli</i> O157:H7 serotype, <i>Campylobacter</i>, <i>Shigella</i>, and <i>Salmonella</i> often contaminate drinking water supplies in developing nations and are responsible for approximately 1.5 million worldwide annual deaths.   Current technologies for detection of bacteria include DNA hybridization FRET signaling, electrical detection via immobilized antimicrobial peptides, and PCR amplification followed by gel visualization. Our method of bacterial detection fills a niche in biosensor technology. Our design implies lower costs, higher portability, and a more rapid signal output than most bacterial biosensors. Additionally, our interchangeable DNA probe confers modularity, allowing for a range of bacterial detection.  Using a novel split beta-galactosidase complementation assay, we have designed three unique chimeric proteins that recognize and bind to specific pathogenic markers and create a functioning beta-galactosidase enzyme. This functioning enzyme unit then cleaves X-gal and produces a colorimetric output signal. Our research demonstrates success in initial stages of chimeric protein assembly.  
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    <td width="415"><h2>The Problem:<br />
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      Childhood Diarrhea</h2></td>
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    <td colspan="2"><small>Viewed as a minor inconvenience in the developed world, diarrhea can be a death sentence in developing countries. Diarrhea can be life threatening as it causes severe dehydration as a result of extensive fluid loss. An estimated 2.0 billion cases of diarrhea occur each year amongst children under five years of age. Of these cases, 1.5 million children die. The major bacterial pathogens that most frequently cause acute childhood diarrhea are E. coli, Shigella, Campylobacter and Salmonella. Currently, existing biosensors for water-borne pathogens are either costly, unaccessible to developing countries, require large machinery to operate, difficult to use without training, and not very reliable...<a href="https://2012.igem.org/Team:Arizona_State/Problem"><strong>More &gt;</strong></a></small></td>
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          <td width="155"><p align="center"><a class="linkopacity" href="https://2012.igem.org/Team:Arizona_State/Overview">
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          <td width="155"><p align="center"><a class="linkopacity" href="https://2012.igem.org/Team:Arizona_State/Team">
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              <img src="https://static.igem.org/mediawiki/2012/a/ac/DNA_Biosensor.png" width="150" />
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          <td><p align="center"><a class="linkopacity" href="https://2012.igem.org/Team:Arizona_State/Data">
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          <td><p align="center"><a class="linkopacity" href="https://2012.igem.org/Team:Arizona_State/International">
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  <p>&nbsp;</p>
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<b>Contact Us</b>
 
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Arizona State University
 
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ECG 334, PO BOX 9709
 
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Tempe, Arizona 85287
 
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Revision as of 04:50, 25 October 2012



The Problem:
Childhood Diarrhea
Viewed as a minor inconvenience in the developed world, diarrhea can be a death sentence in developing countries. Diarrhea can be life threatening as it causes severe dehydration as a result of extensive fluid loss. An estimated 2.0 billion cases of diarrhea occur each year amongst children under five years of age. Of these cases, 1.5 million children die. The major bacterial pathogens that most frequently cause acute childhood diarrhea are E. coli, Shigella, Campylobacter and Salmonella. Currently, existing biosensors for water-borne pathogens are either costly, unaccessible to developing countries, require large machinery to operate, difficult to use without training, and not very reliable...More >

 


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Arizona State University
ECG 334, PO BOX 9709
Tempe, Arizona 85287
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