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Research Lab Results for sodium

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  • Gabelli Lab

    Lab Website
    Principal Investigator:
    Sandra Gabelli, Ph.D.
    Medicine

    The Gabelli lab research is focused on structural, mechanistic and functional aspects of enzyme... activation that play a role in the biology of human diseases such as cancer, parasitic infection and cardiovascular disease. Their work seeks to:

    1. Understand how molecular events at the recognition level coordinate and trigger events in the cells
    2. Translate structural and mechanistic information on protein:protein interactions at the cytoplasmic level into preventive and therapeutic treatment for human disease.

    To achieve a comprehensive understanding, they are studying cytoplasmic protein-protein interactions involved in regulation of pathways such as PI3K and Sodium Voltage gated channels. Their research integrates structural biology and chemical biology and it is focused on drug discovery for targeted therapies.
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    Research Areas: biochemistry, chemical biology, cell biology, structural biology, proteomics, cancer, diarrhea, diabetes, drugs, cellular signaling, inflammation, pharmacology
  • Intestinal Na/H Exchangers

    Principal Investigator:
    Ming-Tseh Lin, M.D., Ph.D.
    Medicine

    Secretory diarrhea is a leading cause of childhood morbidity and mortality in developing countr...ies. While diarrhea can be treated with oral rehydration solution (ORS), inclusion of zinc with oral ORS has been shown to reduce the duration of diarrhea. However, how zinc improves diarrhea is not known.

    It has been shown that zinc acts as an intestinal epithelial cell basolateral potassium channel blocker of cyclic AMP-mediated chloride secretion. We discovered that zinc also stimulates intestinal sodium and water absorption via the epithelial Na/H exchanger, NHE3. Zinc reverses the effect of cyclic AMP inhibition of NHE3 activity. The effect of zinc on NHE3 cannot be duplicated with other divalent metal ions. It has been well established that Na/H exchanger regulatory proteins are involved in NHE3 regulation.

    Whether these regulatory proteins are involved in zinc stimulation of NHE3 is a focus of our study. Our goal is to reveal mechanisms to explain how zinc improves diarrhea and to understand the role of zinc in salt and water homeostasis in the gut. Our study will provide a scientific basis to justify the inclusion of zinc in ORS for the treatment of secretory diarrhea.
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    Research Areas: gastroenterology, diarrhea
  • Lima Lab

    Lab Website
    Principal Investigator:
    Joao Lima, M.D., M.B.A.
    Medicine

    The Lima Lab’s research is concentrated on the development and application of imaging and techn...ology to address scientific and clinical problems involving the heart and vascular system.

    Specifically, our research is focused on developing magnetic resonance imaging (MRI) contrast techniques to investigate microvascular function in patients and experimental animals with myocardial infarction; functional reserve secondary to dobutamine stimulation and myocardial viability assessed by sodium imaging; and cardiac MRI and computed tomography (CT) program development of techniques to characterize atherosclerosis in humans with cardiovascular or cerebrovascular disease.

    Current projects include:
    • The Coronary Artery Risk Development in Young Adults (CARDIA) Study
    • The MESA (Multi-Ethnic Study of Atherosclerosis) Study
    • The Coronary Artery Evaluation using 64-row Multidetector Computed Tomography Angiography (CORE64) Study

    Joao Lima, MD, is a professor of medicine, radiology and epidemiology at the Johns Hopkins School of Medicine.
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    Research Areas: magnetic resonance, cerebrovascular, imaging, cardiovascular, cardiology, atherosclerosis, computed tomography, vascular, myocardial infarction
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