Angiopoietin-2

A forum to discuss Chronic Cerebrospinal Venous Insufficiency and its relationship to Multiple Sclerosis.
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Petr75
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Angiopoietin-2

Post by Petr75 »

2020 Mar 9
Wihuri Research Institute and Translational Cancer Medicine Program, Faculty of Medicine, University of Helsinki, Helsinki, Finland
Angiopoietin-2 Blockade Ameliorates Autoimmune Neuroinflammation by Inhibiting Leukocyte Recruitment Into the CNS
https://pubmed.ncbi.nlm.nih.gov/3214973 ... o-the-cns/

Abstract

Angiopoietin-2 (Ang2), a ligand of the endothelial Tie2 tyrosine kinase, is involved in vascular inflammation and leakage in critically ill patients. However, the role of Ang2 in demyelinating central nervous system (CNS) autoimmune diseases is unknown. Here, we report that Ang2 is critically involved in the pathogenesis of experimental autoimmune encephalomyelitis (EAE), a rodent model of multiple sclerosis. Ang2 expression was induced in CNS autoimmunity, and transgenic mice overexpressing Ang2 specifically in endothelial cells (ECs) developed a significantly more severe EAE. In contrast, treatment with Ang2-blocking Abs ameliorated neuroinflammation and decreased spinal cord demyelination and leukocyte infiltration into the CNS. Similarly, Ang2-binding and Tie2-activating Ab attenuated the development of CNS autoimmune disease. Ang2 blockade inhibited expression of EC adhesion molecules, improved blood-brain barrier integrity, and decreased expression of genes involved in antigen presentation and proinflammatory responses of microglia and macrophages, which was accompanied by inhibition of α5β1 integrin activation in microglia. Taken together, our data suggest that Ang2 provides a target for increasing Tie2 activation in ECs and inhibiting proinflammatory polarization of CNS myeloid cells via α5β1 integrin in neuroinflammation. Thus, Ang2 targeting may serve as a therapeutic option for the treatment of CNS autoimmune disease.
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frodo
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Re: Angiopoietin-2

Post by frodo »

Petr75 wrote: Thu Mar 12, 2020 10:58 am Angiopoietin-2 (Ang2), a ligand of the endothelial Tie2 tyrosine kinase, is involved in vascular inflammation and leakage in critically ill patients. However, the role of Ang2 in demyelinating central nervous system (CNS) autoimmune diseases is unknown. Here, we report that Ang2 is critically involved in the pathogenesis of experimental autoimmune encephalomyelitis (EAE), a rodent model of multiple sclerosis.
Interesting. It is related to EAE and that is not the same, but it could open a new way of research.
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Petr75
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Re: Angiopoietin-2

Post by Petr75 »

yes


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Angiopoietin-2 Blockade Ameliorates Autoimmune Neuroinflammation by Inhibiting Leukocyte Recruitment Into the CNS
https://pubmed.ncbi.nlm.nih.gov/32149735/

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Angiopoietin-1 and C16 Peptide Attenuate Vascular and Inflammatory Responses in Experimental Allergic Encephalomyelitis
https://pubmed.ncbi.nlm.nih.gov/26553158/
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