Difference between revisions of "Team:AQA Unesp"

 
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document.getElementById("text").innerHTML="<img src='https://static.igem.org/mediawiki/2017/3/35/T--AQA_Unesp--administration.png' id='man_title1'>We want our bacteria to be easily taken: our idea is having a final product that can be ingested by a fermented milk or a lyophilized that can be mixed with other beverages, so it can easily taken by children, adults and elder people without causing any discomforts. Once ingested, the bacteria will be set up in the gut, where it will sense and actuate.";
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document.getElementById("text").innerHTML="<img src='https://static.igem.org/mediawiki/2017/d/d7/T--AQA_Unesp--sensing.png' id='man_title2'>We don’t want to produce insulin the whole time  without any control! So, the bacteria needs to sense and control its production. We will build a control system based on the natural L. lactis system for catabolite repression along with regulation by a small RNA (sRNA). <br /> The CcpA protein is the protein responsible for control the gene expression in gram-positive bacteria, this protein is activated when glucose is present and then it binds to the DNA at the catabolite repression site (CRE) and represses the expression of downstream gene. We will put a coding sequence for a sRNA under the control of a promoter containing a CRE site, that targets the RBS site and the start codon of the mRNA coding the insulin gene, blocking its translation. <br />  This way, when there is no glucose, the expression of our sRNA will be on and will block the production of insulin. Where there is glucose, the expression of our sRNA will be off and we will have the production of insulin. The produced insulin then is ready to be secreted and absorbed.";
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<div class="insubiota-text">INSUBIOTA</div>
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<div class="insubiota-subtext">treating diabetes with genetically engineered probiotic</div>
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Our project was inspired on the alarming and increasing number of diabetic people, especially diabetes mellitus type 1 patients, who are insulin dependent. The lack of less invasive treatments has motivated us to develop a new treatment based on the probiotic bacteria <i>Lactococcus lactis</i>, that was engineered to produce a single-chain analog insulin in human diabetic’s microbiota. The bacteria will be able to produce the insulin associated with a secretion signal sequence and cell-penetrating peptides, to ensure its uptake. Moreover, the synthesis of the insulin will be controlled by the natural bacteria system of catabolite repression with regulation by a small RNA. At the presence of glucose, the insulin gene expression will be activated, and then, it will be ready to be secreted and absorbed, reaching the blood and performing its biological function. Also, in order to contain the release of our engineered probiotic to the environment, we built a kill switch based on light exposure that uses the CRISPR/Cas9 system to destroy essential genes for the bacterial survival. The final product could be a fermented milk or a lyophilized that could be easily ingested by patients.
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<h2 font-color='black'>Treating diabetes with probiotics</h2>
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Latest revision as of 18:13, 15 December 2017



iGEM AQA_Unesp

INSUBIOTA
treating diabetes with genetically engineered probiotic
ABSTRACT
Our project was inspired on the alarming and increasing number of diabetic people, especially diabetes mellitus type 1 patients, who are insulin dependent. The lack of less invasive treatments has motivated us to develop a new treatment based on the probiotic bacteria Lactococcus lactis, that was engineered to produce a single-chain analog insulin in human diabetic’s microbiota. The bacteria will be able to produce the insulin associated with a secretion signal sequence and cell-penetrating peptides, to ensure its uptake. Moreover, the synthesis of the insulin will be controlled by the natural bacteria system of catabolite repression with regulation by a small RNA. At the presence of glucose, the insulin gene expression will be activated, and then, it will be ready to be secreted and absorbed, reaching the blood and performing its biological function. Also, in order to contain the release of our engineered probiotic to the environment, we built a kill switch based on light exposure that uses the CRISPR/Cas9 system to destroy essential genes for the bacterial survival. The final product could be a fermented milk or a lyophilized that could be easily ingested by patients.
Team: AQA_Unesp