“Role of the linear ubiquitination assembly complex in the regulation of lung injury and inflammation

“Role of the linear ubiquitination assembly complex in the regulation of lung injury and inflammation

Laura Dada, Ph.D.
Northwestern University
Wed, 10/12/2016 - 4:00pm

221 Integrated Sciences Building

The major goal of our research is to study the role of the Na,K-ATPase subunits in the regulation of alveolar epithelial function in normal and hypoxic conditions. We will shift the emphasis from the transport function of the Na,K-ATPase to its important role in stabilizing intercellular junctions and hence in alveolar epithelial integrity. Hypoxemia and injury of the alveolar-capillary barrier might result not only in a decrease in Na,K-ATPase activity but also in weakening interactions between the Na,K-ATPase ß1 subunits in neighboring cells. We will determine the molecular mechanisms regulating these ß1:ß1 interactions and design strategies to strengthen them as a way to enhance the function of the alveolar epithelial barrier. We are also interested in the role of FXYD5, which regulates cell-cell adhesion and the integrity of the alveolar epithelium by inhibiting the intercellular interaction between the Na,K-ATPase ß1 subunits of neighboring cells in a competitive mode. Given the fact that FXYD proteins are expressed and interact with the Na,K-ATPase in a tissue-specific way, understanding the molecular mechanisms of FXYD5-mediated regulation of ß1:ß1 interactions and thus alveolar epithelial barrier function may lead to novel, more effective treatment of acute lung injury.


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