Mitochondria dysfunction in lung cancer-induced muscle wasting in C2C12 myotubes.
Mitochondria dysfunction in lung cancer-induced muscle wasting in C2C12 myotubes.
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DOI:
10.3389/fphys.2014.00503
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发表时间:
2014
影响因子:
4
通讯作者:
Andrade FH
中科院分区:
文献类型:
--
作者:
McLean JB;Moylan JS;Andrade FH
Aims: Cancer cachexia is a syndrome which results in severe loss of muscle mass and marked fatigue. Conditioned media from cachexia-inducing cancer cells triggers metabolic dysfunction in skeletal muscle, including decreased mitochondrial respiration, which may contribute to fatigue. We hypothesized that Lewis lung carcinoma conditioned medium (LCM) would impair the mitochondrial electron transport chain (ETC) and increase production of reactive oxygen species, ultimately leading to decreased mitochondrial respiration. We incubated C2C12 myotubes with LCM for 30 min, 2, 4, 24 or 48 h. We measured protein content by western blot; oxidant production by 2′,7′-dichlorofluorescin diacetate (DCF), 4-amino-5-methylamino-2′,7′-difluorofluorescein diacetate (DAF), and MitoSox; cytochrome c oxidase activity by oxidation of cytochrome c substrate; and oxygen consumption rate (OCR) of intact myotubes by Seahorse XF Analyzer. Results: LCM treatment for 2 or 24 h decreased basal OCR and ATP-related OCR, but did not alter the content of mitochondrial complexes I, III, IV and V. LCM treatment caused a transient rise in reactive oxygen species (ROS). In particular, mitochondrial superoxide (MitoSOX) was elevated at 2 h. 4-Hydroxynonenal, a marker of oxidative stress, was elevated in both cytosolic and mitochondrial fractions of cell lysates after LCM treatment. Conclusion: These data show that lung cancer-conditioned media alters electron flow in the ETC and increases mitochondrial ROS production, both of which may ultimately impair aerobic metabolism and decrease muscle endurance.
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影响因子:
4.8
作者:
Cho, Sunghee;Szeto, Hazel H.;Pinto, John T.
通讯作者:
Pinto, John T.
DOI:
10.1042/bj20111451
发表时间:
2012-01-15
期刊:
The Biochemical journal
影响因子:
--
作者:
Lee J;Giordano S;Zhang J
通讯作者:
Zhang J
DOI:
10.3233/jad-2010-100564
发表时间:
2010
期刊:
Journal of Alzheimer's disease : JAD
影响因子:
--
作者:
Manczak M;Mao P;Calkins MJ;Cornea A;Reddy AP;Murphy MP;Szeto HH;Park B;Reddy PH
通讯作者:
Reddy PH
影响因子:
3.3
作者:
Hardin, Brian J.;Campbell, Kenneth S.;Reid, Michael B.
通讯作者:
Reid, Michael B.
影响因子:
3.7
作者:
Lemire J;Mailloux RJ;Appanna VD
通讯作者:
Appanna VD