scholarly journals Erratum for Bandyopadhaya et al., “Pseudomonas aeruginosa Quorum Sensing Molecule Alters Skeletal Muscle Protein Homeostasis by Perturbing the Antioxidant Defense System”

mBio ◽  
2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Arunava Bandyopadhaya ◽  
A. Aria Tzika ◽  
Laurence G. Rahme
Keyword(s):  
Skeletal Muscle ◽  
Pseudomonas Aeruginosa ◽  
Quorum Sensing ◽  
Antioxidant Defense ◽  
Muscle Protein ◽  
Antioxidant Defense System ◽  
Protein Homeostasis ◽  
Defense System ◽  
Skeletal Muscle Protein ◽  
Quorum Sensing Molecule

Skeletal muscle uncoupling-induced longevity in mice is linked to increased substrate metabolism and induction of the endogenous antioxidant defense system

2013 ◽  
Vol 304 (5) ◽  
pp. E495-E506 ◽  
Author(s):  
S. Keipert ◽  
M. Ost ◽  
A. Chadt ◽  
A. Voigt ◽  
V. Ayala ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Skeletal Muscle ◽  
Antioxidant Defense ◽  
Antioxidant Defense System ◽  
Mapk Signaling ◽  
Redox Signaling ◽  
Defense System ◽  
High Fat ◽  
Substrate Metabolism ◽  
Endogenous Antioxidant

Ectopic expression of uncoupling protein 1 (UCP1) in skeletal muscle (SM) mitochondria increases lifespan considerably in high-fat diet-fed UCP1 Tg mice compared with wild types (WT). To clarify the underlying mechanisms, we investigated substrate metabolism as well as oxidative stress damage and antioxidant defense in SM of low-fat- and high-fat-fed mice. Tg mice showed an increased protein expression of phosphorylated AMP-activated protein kinase, markers of lipid turnover (p-ACC, FAT/CD36), and an increased SM ex vivo fatty acid oxidation. Surprisingly, UCP1 Tg mice showed elevated lipid peroxidative protein modifications with no changes in glycoxidation or direct protein oxidation. This was paralleled by an induction of catalase and superoxide dismutase activity, an increased redox signaling (MAPK signaling pathway), and increased expression of stress-protective heat shock protein 25. We conclude that increased skeletal muscle mitochondrial uncoupling in vivo does not reduce the oxidative stress status in the muscle cell. Moreover, it increases lipid metabolism and reactive lipid-derived carbonyls. This stress induction in turn increases the endogenous antioxidant defense system and redox signaling. Altogether, our data argue for an adaptive role of reactive species as essential signaling molecules for health and longevity.

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