Stress-Activated Cap'n'collar Transcription Factors in Aging and Human Disease

Sci. Signal., 9 March 2010
Vol. 3, Issue 112, p. re3
DOI: 10.1126/scisignal.3112re3

Stress-Activated Cap'n'collar Transcription Factors in Aging and Human Disease

  1. Gerasimos P. Sykiotis1,2,* and
  2. Dirk Bohmann1
  1. 1Department of Biomedical Genetics, University of Rochester Medical Center, Rochester, NY 14642, USA.
  2. 2Harvard Reproductive Endocrine Sciences Center and Reproductive Endocrine Unit, Department of Internal Medicine, Massachusetts General Hospital, Boston, MA 02114, USA.
  1. *Corresponding author. E-mail: gerasimos_sykiotis{at}


Cap’n’collar (Cnc) transcription factors are conserved in metazoans and have important developmental and homeostatic functions. The vertebrate Nrf1, Nrf2, and Nrf3; the Caenorhabditis elegans SKN-1; and the Drosophila CncC comprise a subgroup of Cnc factors that mediate adaptive responses to cellular stress. The most studied stress-activated Cnc factor is Nrf2, which orchestrates the transcriptional response of cells to oxidative stressors and electrophilic xenobiotics. In rodent models, signaling by Nrf2 defends against oxidative stress and aging-associated disorders, such as neurodegeneration, respiratory diseases, and cancer. In humans, polymorphisms that decrease Nrf2 abundance have been associated with various pathologies of the skin, respiratory system, and digestive tract. In addition to preventing disease in rodents and humans, Cnc factors have life-span–extending and anti-aging functions in invertebrates. However, despite the pro-longevity and antioxidant roles of stress-activated Cnc factors, their activity paradoxically declines in aging model organisms and in humans suffering from progressive respiratory disease or neurodegeneration. We review the roles and regulation of stress-activated Cnc factors across species, present all reported instances in which their activity is paradoxically decreased in aging and disease, and discuss the possibility that the pharmacological restoration of Nrf2 signaling may be useful in the prevention and treatment of age-related diseases.


G. P. Sykiotis and D. Bohmann, Stress-Activated Cap'n'collar Transcription Factors in Aging and Human Disease. Sci. Signal. 3, re3 (2010).

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