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Roles of Chemokine CXCL12 and its Receptors in Ischemic Stroke

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Chemokine CXC ligand 12 (CXCL12), originally named stromal cell-derived factor-1 (SDF-1), is a member of the CXC chemokine subfamily. CXCL12 is found to be expressed by all cell types that are presented in the central nervous system (CNS). It works in conjunction with the G-protein coupled receptor CXCR4, which is found at the surface of a variety of cells including neurons, astrocytes, microglia, bone marrow-derived cells, as well as other progenitor cells. Recent studies revealed that CXCL12 could also bind and signal through receptor CXCR7. CXCL12 and CXCR4 are constitutively expressed in the brain but are up-regulated in the ischemic penumbra regions following ischemic stroke. CXCL12/CXCR4 play important roles in multiple processes after ischemic stroke, which include inflammatory response, focal angiogenesis, and the recruitment of bone marrow-derived cells (BMCs) and neural progenitor cell (NPC) to injury. In addition to its roles in stroke pathology, CXCL12 is also thought to be a key regulator in stroke repairing. This review will focus on the function of CXCL12/CXCR4 in post-stroke inflammation and neurovascular repairing. The potential application of CXCL12 modulation in clinical stroke treatment is also discussed.

Keywords: Angiogenesis; CXCL12; CXCR4; CXCR7; chemokine; inflammation; ischemia; receptor; signaling pathways; stroke

Document Type: Research Article

Publication date: February 1, 2012

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  • Current Drug Targets aims to cover the latest and most outstanding developments on the medicinal chemistry and pharmacology of molecular drug targets e.g. disease specific proteins, receptors, enzymes, genes. Each issue of the journal will be devoted to a single timely topic, with series of in-depth reviews, written by leaders in the field, covering a range of current topics on drug targets. These issues will be organized and led by a guest editor who is a recognized expert in the overall topic. As the discovery, identification, characterisation and validation of novel human drug targets for drug discovery continues to grow; this journal will be essential reading for all pharmaceutical scientists involved in drug discovery and development.
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