CXCR4

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CXCR4

A gene on chromosome 2q21 that encodes a seven-transmembrane G protein-coupled receptor belonging to the CXC chemokine receptor family, which binds specifically to stromal cell-derived factor-1, transducing a signal by increasing intracellular calcium ions and enhancing MAPK1/MAPK3 activation. It acts as a receptor for extracellular ubiquitin, is involved in haematopoiesis and in cardiac ventricular septum formation, plays a role in gastrointestinal tract vascularisation by regulating vascular branching and/or remodelling in endothelial cells, may be involved in cerebellar development and, in the CNS, may mediate hippocampal-neuron survival.

Molecular pathology
CXCR4 acts with the CD4 to support HIV entry into cells; it is highly expressed in breast cancer cells. CXCR4 mutations cause WHIM (warts, hypogammaglobulinaemia, infections, and myelokathexis) syndrome.
References in periodicals archive ?
Schwartz et al (20) demonstrated high levels of the neural stem cell markers like CD133, CD44, CD81, CD184, CD90, and CD29 positive but CD133 cell population was decreased in high-passage, lineage-restricted cultures.
FITC PE PE-Cy5 APC 1 [kappa] CD34 CD62L CD38 2 [kappa] CD14 CD44 CD38 3 [kappa] CD126 HLA-DR CD38 4 [kappa] CD117 CD128 CD38 5 [kappa] CD11b CD38 CD3 6 [kappa] CD184 CD38 CD19 7 [kappa] CD45ro CD38 CD10 8 [kappa] CD31 CD38 CD54 9 [kappa] CD50 CD38 CD49d 10 [kappa] CD130 CD38 CD44 11 [kappa] CD56 CD38 CD20 12 [lambda] CD34 CD62L CD38 13 [lambda] CD14 CD44 CD38 14 [lambda] CD126 HLA-DR CD38 15 [lambda] CD117 CD128 CD38 16 [lambda] CD11b CD38 CD3 17 [lambda] CD184 CD38 CD19 18 [lambda] CD45ro CD38 CD10 19 [lambda] CD31 CD38 CD54 20 [lambda] CD50 CD38 CD49d 21 [lambda] CD130 CD38 CD44 22 [lambda] CD56 CD38 CD20 Abbreviations: APC, allophycocyanin; FITC, fluorescein isothiocyanate; PE, phycoerythrin; PE-Cy5, phycoerythrin-Cy5.