GRO-α/CXCR2 system and ADAM17 correlated expression in Sjögren's syndrome
Sabrina Lisi1, Margherita Sisto, Dario Domenico Lofrumento
1Department of Basic Medical Sciences, Section of Human Anatomy and Histology, Laboratory of Cell Biology, University of Bari Medical School, Bari, Italy. sabrina.lisi@uniba.it
Abstract:
The chemokine GRO-α and its receptor CXCR2 are associated with the chronic inflammation in Sjögren's syndrome (SS). To better understand the molecular mechanisms by which the GRO-α/CXCR2 system is involved in the SS inflammatory condition, our studies were designed to clarify the role of ADAM17 activation in the modulation of the GRO-α/CXCR2 chemokine system in epithelial cells (SGEC) from SS salivary glands. The CXCR2 overexpression observed in SS SGEC was dramatically decreased by ADAM17 inhibitor TAPI-1. In addition, comparing the expression levels of ADAM17 in healthy SGEC in presence or not of GRO-α treatment, we observed that GRO-α dose-dependently influences ADAM17 activation, an effect that was inhibited by blocking the interaction of GRO-α with its CXCR2 receptor. Our data show for the first time that ADAM17 has an important role in GRO-α/CXCR2 system activity regulation, suggesting that regulating CXCR2/ADAM17 interaction could be an attractive therapeutic target in SS.
Related Concept Videos
The JAK-STAT Signaling Pathway
GPCRs Regulate Adenylyl Cylase Activity
Two...
TGF - β Signaling Pathway
Sympathetic Pathways: Collateral Ganglia and Adrenal Medulla
Collateral Ganglia
Sympathetic preganglionic axons reach the collateral ganglia along the route of splanchnic nerves. These nerves bypass the sympathetic trunk and communicate with sympathetic postganglionic neurons housed in the prevertebral ganglia. These ganglia supply the organs of the abdominopelvic cavity.
The greater splanchnic nerve, formed by the...
Antigens Involved in Adaptive Immunity
Complete Antigens
Complete antigens possess both immunogenicity and reactivity.
Cystic Fibrosis: Pathogenesis
CF is primarily caused by a genetic mutation in a chromosome 7 gene coding for the cystic fibrosis transmembrane conductance regulator (CFTR) protein. The most common gene mutation leading to CF is the ΔF508 mutation, but...


