Mitochondrial signals initiate the activation of c-Jun N-terminal kinase (JNK) by hypoxia-reoxygenation

Christopher J. Dougherty, Lori A. Kubasiak, Donna P. Frazier, Huifang Li, Wen Cheng Xiong, Nanette Bishopric, Keith A Webster

Research output: Contribution to journalArticle

79 Citations (Scopus)

Abstract

C-Jun N-terminal kinase (JNK) is part of the mitogen-activated protein kinase (MAPK) family of signaling pathways that are induced in response to extracellular stimuli. JNK is primarily a stress-response pathway and can be activated by proinflammatory cytokines and growth factors coupled to membrane receptors or through non-receptor pathways by stimuli such as heat shock, UV irradiation, protein synthesis inhibitors, and conditions that elevate the levels of reactive oxygen intermediates (ROI). The molecular initiators of MAPKs by non-receptor stimuli have not been described. Ischemia followed by reperfusion or hypoxia with reoxygenation represents a condition of high oxidative stress where JNK activation is associated with elevated ROI. We show here that the activation of JNK by this condition is initiated in the mitochondria and requires coupled electron transport, ROI generation, and calcium flux. These signals cause the selective, sequential activation of the calcium-dependent, proline-rich kinase Pyk2 and the small GTP binding factors Rac-1 and Cdc42. Interruption of these interactions with inactivated dominant negative mutant proteins, blocking calcium flux, or inhibiting electron transport through mitochondrial complexes II, III, or IV prevents JNK activation and results in a proapoptotic phenotype that is characteristic of JNK inhibition in this model of ischemia-reperfusion. The signaling pathway is unique for the reoxygenation stimulus and provides a framework for other non-receptor-mediated pathways of MAPK activation.

Original languageEnglish
Pages (from-to)1060-1070
Number of pages11
JournalFASEB Journal
Volume18
Issue number10
DOIs
StatePublished - Jul 1 2004

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JNK Mitogen-Activated Protein Kinases
mitogen-activated protein kinase
hypoxia
Chemical activation
Oxygen
Electron Transport
Mitogen-Activated Protein Kinases
Calcium
Reperfusion
Phosphotransferases
Ischemia
ischemia
oxygen
calcium
Fluxes
succinate dehydrogenase (quinone)
Mitochondria
Protein Synthesis Inhibitors
Oxidative stress
phosphotransferases (kinases)

Keywords

  • Apoptosis
  • Calcium
  • Cardiac myocyte
  • Mitochondria
  • Pyk2
  • Rac-1
  • ROI

ASJC Scopus subject areas

  • Agricultural and Biological Sciences (miscellaneous)
  • Biochemistry, Genetics and Molecular Biology(all)
  • Biochemistry
  • Cell Biology

Cite this

Dougherty, C. J., Kubasiak, L. A., Frazier, D. P., Li, H., Xiong, W. C., Bishopric, N., & Webster, K. A. (2004). Mitochondrial signals initiate the activation of c-Jun N-terminal kinase (JNK) by hypoxia-reoxygenation. FASEB Journal, 18(10), 1060-1070. https://doi.org/10.1096/fj.04-1505com

Mitochondrial signals initiate the activation of c-Jun N-terminal kinase (JNK) by hypoxia-reoxygenation. / Dougherty, Christopher J.; Kubasiak, Lori A.; Frazier, Donna P.; Li, Huifang; Xiong, Wen Cheng; Bishopric, Nanette; Webster, Keith A.

In: FASEB Journal, Vol. 18, No. 10, 01.07.2004, p. 1060-1070.

Research output: Contribution to journalArticle

Dougherty, CJ, Kubasiak, LA, Frazier, DP, Li, H, Xiong, WC, Bishopric, N & Webster, KA 2004, 'Mitochondrial signals initiate the activation of c-Jun N-terminal kinase (JNK) by hypoxia-reoxygenation', FASEB Journal, vol. 18, no. 10, pp. 1060-1070. https://doi.org/10.1096/fj.04-1505com
Dougherty CJ, Kubasiak LA, Frazier DP, Li H, Xiong WC, Bishopric N et al. Mitochondrial signals initiate the activation of c-Jun N-terminal kinase (JNK) by hypoxia-reoxygenation. FASEB Journal. 2004 Jul 1;18(10):1060-1070. https://doi.org/10.1096/fj.04-1505com
Dougherty, Christopher J. ; Kubasiak, Lori A. ; Frazier, Donna P. ; Li, Huifang ; Xiong, Wen Cheng ; Bishopric, Nanette ; Webster, Keith A. / Mitochondrial signals initiate the activation of c-Jun N-terminal kinase (JNK) by hypoxia-reoxygenation. In: FASEB Journal. 2004 ; Vol. 18, No. 10. pp. 1060-1070.
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