Abstract
A better understanding of the molecular basis of polycation-mediated impairment of mitochondrial bioenergetics might improve the design and synthesis of more efficient and safer polymeric transfectants. Here we utilize the phosphorylation control protocol for studying the effect of polycations on mitochondrial respiration in intact mammalian cells using Oxygraph-2k (OROBOROS). The protocol offers an opportunity to comprehensively monitor mitochondrial respiration through consecutive additions of various cell membrane permeable compounds that alter mitochondrial respiration, thus providing useful information on different states of mitochondrial respiration. Furthermore, we demonstrate how to analyze the data obtained with the phosphorylation control protocol and how to calculate the respiratory flux ratios, which can be used as indicators of respiratory functionality and mitochondrial health.
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