Mitochondrial spare respiratory capacity: Mechanisms, regulation, and significance in non‐transformed and cancer cells

P. Marchetti,Quentin Fovez,Nicolas Germain,R. Khamari,J. Kluza

Published 2020 in The FASEB Journal

ABSTRACT

Mitochondrial metabolism must constantly adapt to stress conditions in order to maintain bioenergetic levels related to cellular functions. This absence of proper adaptation can be seen in a wide array of conditions, including cancer. Metabolic adaptation calls on mitochondrial function and draws on the mitochondrial reserve to meet increasing needs. Among mitochondrial respiratory parameters, the spare respiratory capacity (SRC) represents a particularly robust functional parameter to evaluate mitochondrial reserve. We provide an overview of potential SRC mechanisms and regulation with a focus on its particular significance in cancer cells.

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