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- W3014861036 abstract "New Findings What is the central question of this study? We previously demonstrated that quercetin transiently preserved respiratory function in dystrophin‐deficient mice. To gain lasting therapeutic benefits, we tested quercetin in combination with nicotinamide riboside, lisinopril and prednisolone in the D2‐mdx model. What is the main finding and its importance? We demonstrated that these quercetin‐based cocktails did not preserve respiratory or diaphragmatic function or reduce histological damage after 7 months of treatment starting at 4 months of age. Abstract Duchenne muscular dystrophy is characterized by the absence of dystrophin protein and causes muscle weakness and muscle injury, culminating in respiratory failure and cardiomyopathy. Quercetin transiently improved respiratory function but failed to maintain long‐term therapeutic benefits in mdx mice. In this study, we combined quercetin with nicotinamide riboside (NR), lisinopril and prednisolone to assess the efficacy of quercetin‐based cocktails. We hypothesized that quercetin, NR and lisinopril independently would improve respiratory function and decrease diaphragmatic injury and when combined would have additive effects. To address this hypothesis, in vivo respiratory function, in vitro diaphragmatic function and histological injury were assessed in DBA (healthy), D2‐mdx (dystrophic) and D2‐mdx mice treated with combinations of quercetin, NR and lisinopril from 4 to 11 months of age. Respiratory function, assessed using whole‐body plethysmography, was largely similar between healthy and dystrophin‐deficient mice. Diaphragm specific tension was decreased by ∼50% in dystrophic mice compared with healthy mice ( P < 0.05), but fatigue resistance was similar between groups. Contractile area was decreased by ∼10% ( P < 0.05) and fibrotic area increased from 3.5% in healthy diaphragms to 27% ( P < 0.05) in dystrophic diaphragms. Contrary to expectations, these functional and histological parameters of disease were not offset by any intervention. These data suggest that quercetin, NR and lisinopril, independently and in combination, did not prevent diaphragmatic injury or preserve respiratory function." @default.
- W3014861036 created "2020-04-10" @default.
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- W3014861036 date "2020-05-19" @default.
- W3014861036 modified "2023-09-27" @default.
- W3014861036 title "Nutraceutical and pharmaceutical cocktails did not preserve diaphragm muscle function or reduce muscle damage in D2‐mdx mice" @default.
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- W3014861036 doi "https://doi.org/10.1113/ep087887" @default.
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