Dataset Information

Inhalation of the prodrug PI3K inhibitor CL27c improves lung function in asthma and fibrosis.

ABSTRACT: PI3K activation plays a central role in the development of pulmonary inflammation and tissue remodeling. PI3K inhibitors may thus offer an improved therapeutic opportunity to treat non-resolving lung inflammation but their action is limited by unwanted on-target systemic toxicity. Here we present CL27c, a prodrug pan-PI3K inhibitor designed for local therapy, and investigate whether inhaled CL27c is effective in asthma and pulmonary fibrosis. Mice inhaling CL27c show reduced insulin-evoked Akt phosphorylation in lungs, but no change in other tissues and no increase in blood glycaemia, in line with a local action. In murine models of acute or glucocorticoid-resistant neutrophilic asthma, inhaled CL27c reduces inflammation and improves lung function. Finally, inhaled CL27c administered in a therapeutic setting protects from bleomycin-induced lung fibrosis, ultimately leading to significantly improved survival. Therefore, local delivery of a pan-PI3K inhibitor prodrug reduces systemic on-target side effects but effectively treats asthma and irreversible pulmonary fibrosis.

SUBMITTER: Campa CC

PROVIDER: S-EPMC6290777 | biostudies-literature | 2018 Dec

REPOSITORIES: biostudies-literature

ACCESS DATA

Publications

Inhalation of the prodrug PI3K inhibitor CL27c improves lung function in asthma and fibrosis.

Campa Carlo C CC Silva Rangel L RL Margaria Jean P JP Pirali Tracey T Mattos Matheus S MS Kraemer Lucas R LR Reis Diego C DC Grosa Giorgio G Copperi Francesca F Dalmarco Eduardo M EM Lima-Júnior Roberto C P RCP Aprile Silvio S Sala Valentina V Dal Bello Federica F Prado Douglas Silva DS Alves-Filho Jose Carlos JC Medana Claudio C Cassali Geovanni D GD Tron Gian Cesare GC Teixeira Mauro M MM Ciraolo Elisa E Russo Remo C RC Hirsch Emilio E

Nature communications 20181212 1

PI3K activation plays a central role in the development of pulmonary inflammation and tissue remodeling. PI3K inhibitors may thus offer an improved therapeutic opportunity to treat non-resolving lung inflammation but their action is limited by unwanted on-target systemic toxicity. Here we present CL27c, a prodrug pan-PI3K inhibitor designed for local therapy, and investigate whether inhaled CL27c is effective in asthma and pulmonary fibrosis. Mice inhaling CL27c show reduced insulin-evoked Akt p ...[more]

PMID: 30542075

Similar Datasets

Project description:Background:Dupilumab, a fully human monoclonal antibody, blocks the shared receptor component for interleukin-4 and interleukin-13, key drivers of type 2 inflammation. In the phase 3 LIBERTY ASTHMA QUEST trial (NCT02414854) in patients with uncontrolled, moderate-to-severe asthma, add-on dupilumab 200?mg or 300?mg every 2?weeks reduced exacerbations and improved forced expiratory volume in 1?s (FEV1) and quality of life over 52?weeks. This analysis evaluates dupilimab's effect on lung function in the overall population, and subgroups with baseline elevated type 2 inflammatory biomarkers. Methods:Patients were randomised to 52?weeks of subcutaneous dupilumab 200?mg every 2 weeks, 300?mg every 2 weeks, or matched-volume placebos. Lung function outcomes were analysed in the overall population, in patients with ?150?eosinophils·µL-1, ?300?eosinophils·µL-1, ?25?ppb fractional exhaled nitric oxide (F eNO), and both ?150?eosinophils·µL-1 and ?25?ppb F eNO, at baseline. Results:Dupilumab treatment (200?mg and 300?mg every 2?weeks) resulted in significant improvements versus placebo after 52?weeks in pre-bronchodilator FEV1 (0.20 and 0.13?L, respectively, versus placebo) and post-bronchodilator FEV1 (0.19 and 0.13?L, respectively), forced vital capacity (FVC) (0.20 and 0.14?L, respectively), forced expiratory flow (0.19 and 0.13?L·s-1, respectively) and pre-bronchodilator FEV1/FVC ratio (1.75% and 1.61%, respectively) in the overall population (p<0.001). Difference versus placebo in post-bronchodilator FEV1 slope of change (weeks 4-52) was significant (0.04?L·year-1; p<0.05). Greater improvements were achieved in patients with elevated baseline blood eosinophil and/or F eNO levels for most outcomes. Conclusions:Dupilumab improves lung function outcomes, including large and small airway measurements and fixed airway obstruction, in patients with uncontrolled, moderate-to-severe asthma; particularly in patients with elevated biomarkers of type 2 inflammation.

Project description:Sulfur mustard (SM) inhalation causes debilitating pulmonary injury in humans which progresses to fibrosis. Herein, we developed a rat model of SM toxicity which parallels pathological changes in the respiratory tract observed in humans. SM vapor inhalation caused dose (0.2-0.6 mg/kg)-related damage to the respiratory tract within 3 days of exposure. At 0.4-0.6 mg/kg, ulceration of the proximal bronchioles, edema and inflammation were observed, along with a proteinaceous exudate containing inflammatory cells in alveolar regions. Time course studies revealed that the pathologic response was biphasic. Thus, changes observed at 3 days post-SM were reduced at 7-16 days; this was followed by more robust aberrations at 28 days, including epithelial necrosis and hyperplasia in the distal bronchioles, thickened alveolar walls, enlarged vacuolated macrophages, and interstitial fibrosis. Histopathologic changes were correlated with biphasic increases in bronchoalveolar lavage (BAL) cell and protein content and proliferating cell nuclear antigen expression. Proinflammatory proteins receptor for advanced glycation end product (RAGE), high-mobility group box protein (HMGB)-1, and matrix metalloproteinase (MMP)-9 also increased in a biphasic manner following SM inhalation, along with surfactant protein-D (SP-D). Tumor necrosis factor (TNF)-α and inducible nitric oxide synthase (iNOS), inflammatory proteins implicated in mustard lung toxicity, and the proinflammatory/profibrotic protein, galectin (Gal)-3, were upregulated in alveolar macrophages and in bronchiolar regions at 3 and 28 days post-SM. Inflammatory changes in the lung were associated with oxidative stress, as reflected by increased expression of heme oxygenase (HO)-1. These data demonstrate a similar pathologic response to inhaled SM in rats and humans suggesting that this rodent model can be used for mechanistic studies and for the identification of efficacious therapeutics for mitigating toxicity.

Dataset Information

Inhalation of the prodrug PI3K inhibitor CL27c improves lung function in asthma and fibrosis.

Publications

Inhalation of the prodrug PI3K inhibitor CL27c improves lung function in asthma and fibrosis.

Similar Datasets

OmicsDI is part of the ELIXIR infrastructure

Tweets