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• W2105734879 endingPage "H842" @default.
• W2105734879 startingPage "H829" @default.
• W2105734879 abstract "Redox status has emerged as critical in modulating stemness and lineage commitment in several precursor cell types. However, a role for redox genes, specifically NADPH oxidases (Nox), in cardiac precursor cells (CPCs) has not been established. We tested whether CPCs marked by type III receptor tyrosine kinase c-kit (c-kit(+)) exhibit a unique NADPH oxidase signature that confers precursor status and whether alterations in this profile are functionally linked to changes in lineage specification. Dihydroethidium (DHE) microfluorography indicated reduced basal reactive oxygen species (ROS) formation within early postnatal c-kit(+) CPCs. Real-time quantitative PCR revealed downregulation of ROS generator Nox2 and its subunit p67(phox) in c-kit(+) CPCs under basal conditions but upregulation of Nox2 and Nox4 over the course of differentiation. Adenoviral silencing of Nox2 and Nox4 increased expression of CPC markers c-kit and Flk-1 and blunted smooth and cardiac muscle differentiation, respectively, while overexpression of Nox2 and Nox4 significantly reduced c-kit expression. These changes were accompanied by altered expression of transcription factors regulating cardiac lineage commitment, Gata6 and Gata4, and cytokine transforming growth factor (TGF)-β1. Similar to other precursor cell types, RT(2)Profiler PCR Arrays revealed that c-kit(+) CPCs also exhibit enhanced antioxidant capacity at the mRNA level. In conclusion, we report that c-kit(+) CPCs demonstrate reduced Nox2 expression and ROS levels and that increases in Nox2 and Nox4 influence their differentiation into mature cells. We speculate that ROS generators Nox2 and Nox4, along with the antioxidant genes identified by PCR Arrays, may be novel targets in CPCs that could prove useful in cell-based therapy of the heart." @default.
• W2105734879 created "2016-06-24" @default.
• W2105734879 creator A5002019649 @default.
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• W2105734879 date "2013-09-15" @default.
• W2105734879 modified "2023-09-27" @default.
• W2105734879 title "Nox2 and Nox4 influence neonatal c-kit⁺ cardiac precursor cell status and differentiation" @default.
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• W2105734879 doi "https://doi.org/10.1152/ajpheart.00761.2012" @default.
• W2105734879 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/3761344" @default.
• W2105734879 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/23832701" @default.
• W2105734879 hasPublicationYear "2013" @default.
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