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Research Lab Results for epithelial cells

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  • Andrew Lane Lab

    The Lane laboratory is focused on understanding molecular mechanisms underlying chronic rhinosi...nusitis, particularly the pathogenesis of nasal polyps, as well as inflammation on the olfactory epithelium. Diverse techniques in molecular biology, immunology, and physiology are utilized to study epithelial cell innate immunity, olfactory loss, and response to viral infection. Ongoing work explores how epithelial cells of the sinuses and olfactory mucosa participate in the immune response and contribute to chronic inflammation. The lab creates and employs transgenic mouse models of chronic nasal/sinus inflammation to support research in this area. Collaborations are in place with the School of Public Health to explore mechanisms of anti-viral immunity in influenza and COVID-19. view more

    Research Areas: nasal polyps, immunology, COVID-19, olfaction, cell culture, transgenic mice, chronic rhinosinusitis, innate immunity, neuroscience, molecular biology
  • Brendan Cormack Laboratory

    The Brendan Cormack Laboratory studies fungal pathogenesis, particularly the host-pathogen inte...raction for the yeast pathogen Candida glabrata.

    We are trying to identify virulence genes (genes that evolved in response to the host environment) by screening transposon mutants of C. glabrata for mutants that are specifically altered in adherence to epithelial cells, in survival in the presence of macrophages and PMNs. We also screen mutants directly in mice for those unable to colonize or persist in the normal target organs (liver, kidney and spleen).

    We also focus research on a family of genes--the EPA genes--that allow the organism to bind to host cells. Our research shows that a subset of them are able to mediate adherence to host epithelial cells. We are trying to understand the contribution of this family to virulence in C. glabrata by figuring out what the ligand specificity is of different family members, how genes are normally regulated during infection, and what mechanisms normally act to keep the genes transcriptionally silent and how that silence is regulated.
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    Research Areas: candida glabrata, pathogenesis, virulence genes, yeast, molecular biology
  • Center for Epithelial Disorders

    Principal Investigator:
    Mark Donowitz, M.D.
    Medicine

    The Johns Hopkins Center for Epithelial Disorders focuses on research into the physiology and p...athophysiology of epithelial cells (cells that line the cavities and interior surfaces of the body) of the gastrointestinal (GI) tract, liver, pancreas and kidney. Specifically, the center’s research seeks to:

    -Understand the mechanisms regulating the activity of transport proteins (including channels) of epithelial cells
    Characterize the mechanisms by which polarity of epithelial cells are maintained
    -Investigate the mechanisms controlling transcription of epithelial-specific genes
    Understand the pathophysiological basis of GI and renal diseases that involve the preceding three components
    -The center also provides a framework for training fellows in gastroenterology and hepatology to become independent investigators.

    The center is funded primarily through individual investigator-initiated extramural research grant support from the National Institutes of Health (NIH) as well as multi-investigator grants including RO1, PO1, UO1 and R24.
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    Research Areas: gastroenterology, epithelial cells
  • Linda Smith-Resar Lab

    Lab Website
    Principal Investigator:
    Linda Smith Resar, M.D.
    Medicine

    The Linda Smith-Resar Lab primarily investigates hematologic malignancy and molecular mechanism...s that lead to cancer as well as sickle cell anemia. Recent studies suggest that education is an important and effective component of a patient blood management program and that computerized provider order entry algorithms may serve to maintain compliance with evidence-based transfusion guidelines. Another recent study indicated that colonic epithelial cells undergo metabolic reprogramming during their evolution to colorectal cancer, and the distinct metabolites could serve as diagnostic tools or potential targets in therapy or primary prevention. view more

    Research Areas: blood disorders, sickle cell diseases, blood management programs, hematologic malignancies
  • 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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