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Research Lab Results for photon microscopy

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  • Mark Donowitz Lab

    Lab Website
    Principal Investigator:
    Mark Donowitz, M.D.
    Medicine

    Research in the Mark Donowitz Lab is primarily focused on the development of drug therapy for d...iarrheal disorders, intestinal salt absorption and the proteins involved including their regulation, and the use of human enteroids to understand intestinal physiology and pathophysiology. We study two gene families initially recognized by this laboratory: mammalian Na/H exchangers and the subgroup of PDZ domain containing proteins present in the brush border of epithelial cells called NHERF family. A major finding is that NHE3 exists simultaneously in different sized complexes in the brush border, which change separately as part of signal transduction initiated by mimics of the digestive process. Relevance to the human intestine is being pursued using mini-human intestine made from Lgr5+ stems cells made from intestinal biopsies and measuring function via two-photon microscopy. view more

    Research Areas: gastrointestinal system, gastroenterology, pathophysiology, diarrhea, drugs, physiology
  • Nicholas Zachos Lab

    Principal Investigator:
    Nicholas Zachos, Ph.D.
    Medicine

    Researchers in the Nicholas Zachos Lab work to understand variations in protein trafficking tha...t occur during pathophysiological conditions that cause ion and water transport that result in diarrhea. We recently identified a clathrin-independent endocytic pathway responsible for elevated intracellular calcium-mediated inhibition of NHE3 activity in intestinal epithelial cells. We use advanced imaging techniques, including confocal and multi-photon microscopy, to characterize protein trafficking of intestinal transporters. We also perform functional assays using fluorescent probes (ratiometric and non-ratiometric) to measure ion transport in cell culture models, intact intestinal tissues and human small intestinal enteroids. view more

    Research Areas: imaging, protein trafficking, diarrhea, bioinformatics, molecular biology
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