Comparable respiratory activity in attached and suspended human fibroblasts

Measurement of oxygen consumption of cultured cells is widely used for diagnosis of mitochondrial diseases, drug testing, biotechnology, and toxicology. Fibroblasts are cultured in monolayers, but physiological measurements are carried out in suspended or attached cells. We address the question whet...

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Veröffentlicht in:PloS one 2022-03, Vol.17 (3), p.e0264496-e0264496
Hauptverfasser: Zdrazilova, Lucie, Hansikova, Hana, Gnaiger, Erich
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Hansikova, Hana
Gnaiger, Erich
description Measurement of oxygen consumption of cultured cells is widely used for diagnosis of mitochondrial diseases, drug testing, biotechnology, and toxicology. Fibroblasts are cultured in monolayers, but physiological measurements are carried out in suspended or attached cells. We address the question whether respiration differs in attached versus suspended cells using multiwell respirometry (Agilent Seahorse XF24) and high-resolution respirometry (Oroboros O2k), respectively. Respiration of human dermal fibroblasts measured in culture medium was baseline-corrected for residual oxygen consumption and expressed as oxygen flow per cell. No differences were observed between attached and suspended cells in ROUTINE respiration of living cells and LEAK respiration obtained after inhibition of ATP synthase by oligomycin. The electron transfer capacity was higher in the O2k than in the XF24. This could be explained by a limitation to two uncoupler titrations in the XF24 which led to an underestimation compared to multiple titration steps in the O2k. A quantitative evaluation of respiration measured via different platforms revealed that short-term suspension of fibroblasts did not affect respiratory activity and coupling control. Evaluation of results obtained by different platforms provides a test for reproducibility beyond repeatability. Repeatability and reproducibility are required for building a validated respirometric database.
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subjects Antibiotics
ATP synthase
Biology and Life Sciences
Biotechnology
Calibration
Cell culture
Cell Respiration - physiology
Electron transfer
Fibroblasts
Glucose
Health aspects
Hospitals
Humans
Medical research
Medicine and Health Sciences
Medicine, Experimental
Metabolic disorders
Mitochondria
Morphology
Oligomycin
Oxidative Phosphorylation
Oxygen
Oxygen consumption
Oxygen Consumption - physiology
Pediatrics
Physical Sciences
Physiological aspects
Physiology
Platforms
Reproducibility
Reproducibility of Results
Residual oxygen
Respiration
Respirometry
Sensors
Titration
Toxicology
title Comparable respiratory activity in attached and suspended human fibroblasts
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