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2017 ; 7
(1
): 15336
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Suppression of Th17-polarized airway inflammation by rapamycin
#MMPMID29127369
Joean O
; Hueber A
; Feller F
; Jirmo AC
; Lochner M
; Dittrich AM
; Albrecht M
Sci Rep
2017[Nov]; 7
(1
): 15336
PMID29127369
show ga
Because Th17-polarized airway inflammation correlates with poor control in
bronchial asthma and is a feature of numerous other difficult-to-treat
inflammatory lung diseases, new therapeutic approaches for this type of airway
inflammation are necessary. We assessed different licensed anti-inflammatory
agents with known or expected efficacy against Th17-polarization in mouse models
of Th17-dependent airway inflammation. Upon intravenous transfer of in vitro
derived Th17 cells and intranasal challenge with the corresponding antigen, we
established acute and chronic murine models of Th17-polarised airway
inflammation. Consecutively, we assessed the efficacy of methylprednisolone,
roflumilast, azithromycin, AM80 and rapamycin against acute or chronic
Th17-dependent airway inflammation. Quantifiers for Th17-associated inflammation
comprised: bronchoalveolar lavage (BAL) differential cell counts,
allergen-specific cytokine and immunoglobulin secretion, as well as flow
cytometric phenotyping of pulmonary inflammatory cells. Only rapamycin proved
effective against acute Th17-dependent airway inflammation, accompanied by
increased plasmacytoid dendritic cells (pDCs) and reduced neutrophils as well as
reduced CXCL-1 levels in BAL. Chronic Th17-dependent airway inflammation was
unaltered by rapamycin treatment. None of the other agents showed efficacy in our
models. Our results demonstrate that Th17-dependent airway inflammation is
difficult to treat with known agents. However, we identify rapamycin as an agent
with inhibitory potential against acute Th17-polarized airway inflammation.