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Comparing the blockage of the S1PR1 receptor to silencing microRNA miR-155

This study investigates the correlation between the blockage of S1PR1 receptor using Fingolomid and the reduction of microRNAs, specifically miR-155, in T cells. The experiment aims to compare the effects of miR-155 silencing using siRNA with the addition of Fingolomid to block S1PR1. The study also examines the expression of pro-inflammatory cytokines to evaluate the potential therapeutic implications for Crohn's disease.

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Comparing the blockage of the S1PR1 receptor to silencing microRNA miR-155

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  1. Comparing the blockage of the S1PR1 receptor to silencing microRNA miR-155 Rachel Miller BNFO 300 Spring 2017

  2. Crohn’s Disease • Autoimmune Disease • Classified by the Inflammation of the GI tract • 400,000 people affected in the United States

  3. S1P and S1PR1 Sphingosine-1-phosphate (S1P) • Involved in regulation of lymphocyte migration, maturation and trafficking • S1PR1 main S1P receptor involved in the immune system Sphingosine-1-phosphate receptor 1 (S1PR1)

  4. MicroRNAs

  5. BACKGROUND EXPERIMENT

  6. The Results from Background Experiment When Fingolomid was present, the number of microRNAs decreased in both T cells and exosomes Which leads us to our big question....

  7. Big Question Is the reduction of microRNAs in T cells caused by the blockage of S1PR1 using Fingolomid or is it correlated?

  8. Experiment:Step 1 T cell S1PR1 Fingolomid

  9. Experiment:Step 1 T cell S1PR1 Fingolomid

  10. Experiment:Step 1 T cell S1PR1 Fingolomid

  11. Experiment:Step 1 T cell S1PR1

  12. Experiment:Step 1 T cell S1PR1

  13. Experiment:Step 1 T cell S1PR1 S1P

  14. Experiment:Step 1 T cell S1PR1 Measure miR-155 S1P

  15. Experiment:Step 1 T cell S1PR1 Measure miR-155 S1P Measure Cytokines: IL-2 IL-17 IFN-gamma

  16. Experiment:Step 2 T cell S1PR1 S1P

  17. Experiment:Step 2 T cell S1PR1 S1P

  18. Experiment:Step 2 T cell siRNA S1PR1 miR-155 S1P Measure

  19. Experiment:Step 2 T cell siRNA S1PR1 miR-155 S1P Measure Measure Cytokines: IL-2 IL-17 IFN-gamma

  20. How we are measuring our results: miRNAs • qPCR – quantitative polymerase chain reaction • Real time PCR with • Fluorescent dye binds to DNA • Fluorescent light will increase as qPCR continues

  21. Quantify microRNA Expression

  22. How we are measuring our results: Cytokines • ELISA • Targets are pro-inflammatory cytokines • IL-2 • IL-17 • IFN-gamma

  23. Quantify Cytokine Expression

  24. Expected Results • When Fingolomid is blocking the S1PR1 receptor, microRNA-155 expression will decrease AND cytokine expression will decreased • When miRNA-155 is silenced with siRNA, cytokine expression will match the results with Fingolomid was present • What would these results tell us?

  25. Recap • Is the reduction of microRNAs in T cells caused by the blockage of S1PR1 using Fingolomid or is it correlated? • Experiment: • Compare silencing of miR-155 using siRNA to adding Fingolomid to block S1PR1 • Compare microRNA expressions between the two tests using qPCR • Compare cytokine expression between the two tests using ELISA

  26. Why it Matters • One step closer in understanding Crohn’s disease and other autoimmune diseases • Shows evidence that S1PR1 and microRNAs are tied together • Possible treatment for patients with Crohn’s disease

  27. Questions?

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