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2017 ; 13
(ä): 228-234
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Redox signaling during hypoxia in mammalian cells
#MMPMID28595160
Smith KA
; Waypa GB
; Schumacker PT
Redox Biol
2017[Oct]; 13
(ä): 228-234
PMID28595160
show ga
Hypoxia triggers a wide range of protective responses in mammalian cells, which
are mediated through transcriptional and post-translational mechanisms. Redox
signaling in cells by reactive oxygen species (ROS) such as hydrogen peroxide
(H(2)O(2)) occurs through the reversible oxidation of cysteine thiol groups,
resulting in structural modifications that can change protein function
profoundly. Mitochondria are an important source of ROS generation, and studies
reveal that superoxide generation by the electron transport chain increases
during hypoxia. Other sources of ROS, such as the NAD(P)H oxidases, may also
generate oxidant signals in hypoxia. This review considers the growing body of
work indicating that increased ROS signals during hypoxia are responsible for
regulating the activation of protective mechanisms in diverse cell types.