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Channel: February 2019 – www.thctotalhealthcare.com
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Cannabinoid receptor 2 deficiency exacerbates inflammation and neutrophil recruitment.

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“Cannabinoid receptor (CB)2 is an immune cell-localized GPCR that has been hypothesized to regulate the magnitude of inflammatory responses.

However, there is currently no consensus as to the mechanism by which CB2 mediates its anti-inflammatory effects in vivo. To address this question, we employed a murine dorsal air pouch model with wild-type and CB2-/- 8-12-wk-old female and male C57BL/6 mice and found that acute neutrophil and lymphocyte antigen 6 complex, locus Chi monocyte recruitment in response to Zymosan was significantly enhanced in CB2-/- mice.

Additionally, levels of matrix metalloproteinase 9 and the chemokines C-C motif chemokine ligand (CCL)2, CCL4, and C-X-C motif chemokine ligand 10 in CB2-/- pouch exudates were elevated at earlier time points. Importantly, using mixed bone marrow chimeras, we revealed that the proinflammatory phenotype in CB2-/- mice is neutrophil-intrinsic rather than stromal cell-dependent. Indeed, neutrophils isolated from CB2-/- mice exhibited an enhanced migration-related transcriptional profile and increased adhesive phenotype, and treatment of human neutrophils with a CB2 agonist blocked their endothelial transmigration.

Overall, we have demonstrated that CB2 plays a nonredundant role during acute neutrophil mobilization to sites of inflammation and, as such, it could represent a therapeutic target for the development of novel anti-inflammatory compounds to treat inflammatory human diseases.”

https://www.ncbi.nlm.nih.gov/pubmed/30799631

https://www.fasebj.org/doi/10.1096/fj.201802524R


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