Wojtala 2014 Abstract MiP2014

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Proteomic analysis of mitochondrial Complex I deficient mouse model - impact of Complex I deficiency on p66Shc-Ser36 phosphorylation pathway in NDUFS4-/- mouse tissues.
Link:
Wojtala A
Mitochondr Physiol Network 19.13 - MiP2014

Wojtala A, Koopman WJH, Willems PH, Smeitink JA, Duszynski J, Wieckowski MR (2014)

Event: MiP2014

Key mitochondrial energy-providing reactions are carried out by the oxidative phosphorylation system (OXPHOS), involving the electron transfer and phosphorylation systems including F1Fo-ATP synthase. The most common OXPHOS disorder in humans is associated with Complex I deficiency, leading to fatal encephalomyopathies of early childhood- Leigh-like syndrome [1]. The growth factor adaptor protein p66Shc has a substantial impact on mitochondrial metabolism through regulation of cellular responses to oxidative stress. A low level of p66Shc protein or its complete ablation protects against numerous age-related disorders and may partially prevent pathologies caused by reactive oxygen species (ROS). On the other hand, a high level of p66Shc phosphorylation is correlated with increased intracellular ROS production [2,3].

Organs from NDUFS4-/- mice with Complex I deficiency were used as a model of self-propelling intracellular oxidative stress. The status of the antioxidant defense system, oxidative stress markers and the p66Shc-Ser36 phosphorylation pathway were measured in these tissues. Mass spectrometry analysis was also performed for selected NDUFS4-/- mouse tissues.

In our study, mice with defective Complex I were characterized by attenuated intracellular oxidative stress, connected with increased p66Shc phosphorylation. Mass spectrometry revealed aberrations in the level of Complex I proteins and oxidative stress- related proteins, as well as other proteins involved in metabolic processes.


O2k-Network Lab: NL Nijmegen Koopman WJ


Labels:

Stress:Oxidative stress;RONS  Organism: Mouse 


Enzyme: Complex I 



Event: A1, P-flash  MiP2014 

Affiliation

1-Dep Biochem, Nencki Inst Experimental Biol, Warsaw, Poland; 2-Radbound Univ Medical Centre, Nijmegen, The Netherlands. - a.wojtala@nencki.gov.pl

References and acknowledgements

This work was supported by the Statutory Founding from Nencki Institute of Experimental Biology and Polish Ministry of Science and Higher Education grant W100/HFSC/2011.

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  2. Pinton P, Rimessi A, Marchi S, Orsini F, Migliaccio E, Giorgio M, Contursi C, Minucci S, Mantovani F, Wieckowski MR, Del Sal G, Pelicci PG, Rizzuto R (2007) Protein kinase C beta and prolyl isomerase 1 regulate mitochondrial effects of the life-span determinant p66Shc. Science 315: 659-63.
  3. Suski JM, Karkucinska-Wieckowska A, Lebiedzinska M, Giorgi C, Szczepanowska J, Szabadkai G, Duszynski J, Pronicki M, Pinton P, Wieckowski MR (2011) p66Shc aging protein in control of fibroblasts cell fate. Int J Mol Sci 12: 5373-89.