Loss of CXCL12, a leukocyte localizing cue, from abluminal surfaces of the blood-brain barrier occurs in multiple sclerosis (MS) lesions. However, the mechanisms and consequences of reduced abluminal CXCL12 abundance remain unclear. Here, we show that activation of CXCR7, which scavenges CXCL12, is essential for leukocyte entry via endothelial barriers into the central nervous system (CNS) pare...

BACKGROUND AND OBJECTIVES The chemokine stroma-derived factor 1a (SDF-1a or CXCL12) is essential for proliferation of B lineage acute lymphoblastic leukemia (ALL) cells in their physiological microenvironment, bone marrow stroma. CXCL12 synergizes with cytokines that stimulate myeloid cells, but its interaction with cytokines affecting lymphoid cells has not been examined. We investigated wheth...

OBJECTIVES Placental derived vasculogenic/angiogenic substances in maternal blood are dysregulated in pre-eclampsia. We hypothesized that CXCL12, a chemokine with vasculogenic actions, is amongst such molecules. STUDY DESIGN CXCL12, CXCL16, CXCR4, and CXCR6 immunolocalization in placental tissue was analyzed in pre-eclampsia (n=8) in comparison to controls (n=8). CXCL12, measured by ELISA in ...

BACKGROUND AND AIM Chemokine/receptor axis is a predominant actor of clinical disorders. They are key factors of pathogenesis of almost all clinical situations including asthma. Correspondingly, CXCL12 is involved in the immune responses. Therefore, this study was designed to explore the association between gene polymorphism at position +801 of CXCL12, known as SDF-1α3'A, and susceptibility to ...

The chemokine stromal cell-derived factor-1 (C-X-C motif chemokine ligand 12; CXCL12) is important in the recruitment of leukocytes to the peritoneal cavity and the regulation of endometriotic tissue growth in endometriosis patients. However, the alterations in microRNA (miRNA) expression induced by CXCL12 remain to be fully elucidated. The present study evaluated key miRNAs in CXCL12‑stimulate...

The C-X-C-type chemokine Cxcl12, also known as stromal cell–derived factor-1, plays a critical role in hematopoiesis during fetal development. However, the functional requirement of Cxcl12 in the adult hematopoietic stem/progenitor cell (HSPC) regulation was still unclear. In this report, we developed a murine Cxcl12 conditional deletion model in which the target gene can be deleted at the adul...

The formation of blood vessels in embryos and tumors are different processes but under the control of common molecular mechanisms. Chemokine CXCL12 involved in both embryonic and tumor angiogenesis. In this review, we summarize recent advances in understanding the roles of CXCL12 in brain tumor angiogenesis/vasculogenesis. CXCL12 and its cognate receptors are abnormally induced in brain tumors,...

Gonadotropin-releasing hormone (GnRH) neurons are neuroendocrine cells, located in the hypothalamus, that play an essential role in mammalian reproduction. These neurons originate in the nasal placode and migrate during embryonic development, in association with olfactory/vomeronasal nerves, first in the nose, then through the cribriform plate to enter the forebrain, before settling in the hypo...

INTRODUCTION The ectodomain shedding of epidermal growth factor receptor (EGFR) ligands, such as amphiregulin (AREG), by ADAMs (A Disintegrin And Metalloproteases) can be stimulated by G protein-coupled receptor (GPCR) agonists. Interactions between the CXCR4 GPCR and the CXCL12 chemokine have been shown to mediate gene transcription and cellular proliferation in non-transformed and transformed...

Cerebral ischemia is known to induce cell death through hypoxia and oxidative stress following reperfusion. However, cell death can spread beyond the ischemic core when toxic glutamate levels act on NMDA receptors of surrounding regions. Levels of CXCL12, a chemokine primarily released from glia, reportedly elevate following ischemia. Acute activation of its receptor, CXCR4, appears to serve a ...