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Interleukin 1 receptor antagonist (IL-1ra) prevents or cures pulmonary fibrosis elicited in mice by bleomycin or silica.

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Cytokine

“We explored the role of interleukin 1 (IL-1) in two models of pulmonary fibrosis (PF), elicited in mice by the intra-tracheal instillation of bleomycin or silica

This study indicates that IL-1ra might be useful for the treatment of incipient or established pulmonary fibrosis.”

https://www.ncbi.nlm.nih.gov/pubmed/7683505

http://www.sciencedirect.com/science/article/pii/104346669390024Y?via%3Dihub

“Endogenous interleukin-1 receptor antagonist mediates anti-inflammatory and neuroprotective actions of cannabinoids in neurons and glia. Cannabinoids (CBs) also exert potent anti-inflammatory and neuroprotective effects.  We report for the first time that both CB1 and CB2 receptors modulate release of endogenous IL-1ra. Endogenous IL-1ra is essential for the neuro-protective effects of CBs against excessive activation of glutamate receptors (excitotoxicity). These data suggest a novel neuroprotective mechanism of action for CBs in response to inflammatory or excitotoxic insults that is mediated by both CB1 and CB2 receptor-dependent pathways.”  https://www.ncbi.nlm.nih.gov/pubmed/12878687