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• W4293428207 endingPage "1183" @default.
• W4293428207 startingPage "1164" @default.
• W4293428207 abstract "Macroautophagy/autophagy is a multistep degradative process that is essential for maintaining cellular homeostasis and is often dysregulated during disease. Systematically quantifying flux through this pathway is critical for gaining fundamental insights and effectively modulating this process. Established methods to quantify flux use steady-state measurements, which provide limited information about the perturbation and the cellular response. We present a theoretical and experimental framework to measure autophagic steps in the form of rates under non-steady-state conditions. We use this approach to measure temporal responses to rapamycin and wortmannin treatments, two commonly used autophagy modulators. We quantified changes in autophagy rates in as little as 10 min, which can establish direct mechanisms for autophagy perturbation before feedback begins. We identified concentration-dependent effects of rapamycin on the initial and temporal progression of autophagy rates. We also found variable recovery time from wortmannin’s inhibition of autophagy, which is further accelerated by rapamycin. Furthermore, we applied this approach to study the effect of serum and glutamine starvation on autophagy. Serum starvation led to a rapid and transient increase in all the rates. Glutamine starvation led to a decrease in the rates on a longer timescale. In summary, this new approach enables the quantification of autophagy flux with high sensitivity and temporal resolution and facilitates a comprehensive understanding of this process." @default.
• W4293428207 created "2022-08-29" @default.
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• W4293428207 date "2022-09-24" @default.
• W4293428207 modified "2023-10-01" @default.
• W4293428207 title "Quantitative and temporal measurement of dynamic autophagy rates" @default.
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• W4293428207 doi "https://doi.org/10.1080/15548627.2022.2117515" @default.
• W4293428207 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/36026492" @default.
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