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Communication Dans Un Congrès Année : 2006

Role of Cannabinoid Receptors in an Experimental Model of Inflammatory Angiogenesis

Résumé

Introduction: Angiogenesis depends on a complex network of cells and mediators. The activation or blockade of annabinoid receptors showed to be an interesting pharmacological strategy to attenuate the angiogenic and/or inflammatory response in many experimental models. Here we investigated how this strategy may interfere in inflammatory angiogenesis. Methods: Polyester-polyurethane sponges were implanted in C57BL/6 mice. Animals received daily doses (10 mg/kg, s.c.) of the cannabinoid antagonists SR141716A (CB1) and SR144528 (CB2), separately, or 3 mg/Kg (s.c.) of the cannabinoid CB1/CB2 agonist WIN 55212-2, for 7 or 14 days. The implants were then collected for ELISA, hemoglobin, myeloperoxidase and N-acetylglucosaminidase measurements, used as indexes for angiogenesis, neutrophil and macrophage accumulation, respectively. Results: CB1 or CB2 receptor antagonist treatment was able to reduce cellular influx to the sponge at 7 and 14 days, with distinctive pattern for macrophages and neutrophils. The CB1/CB2 agonist also reduced cellular influx. Both treatments affected angiogenesis. These alterations were accompanied by changes in the levels of TNF-a, VEGF, CXCL1-3/KC, CCL2/JE and RANTES in all treatments. Discussion: The blockade or activation of cannabinoid receptors showed to be effective in reducing inflammatory and angiogenic responses. Altough acting in a similar way, different levels of cytokines and chemokines may help explain this paradoxal response.
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Dates et versions

hal-02752404 , version 1 (03-06-2020)

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  • HAL Id : hal-02752404 , version 1
  • PRODINRA : 274754

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Rodrigo Guabiraba, Amanda M. Coelho, Remo Castro Russo, Lucíola S. Barcelos, Silvia P. Andrade, et al.. Role of Cannabinoid Receptors in an Experimental Model of Inflammatory Angiogenesis. 38. Congresso Brasileiro de Farmacologia e Terapêutica Experimental, 2006. ⟨hal-02752404⟩

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