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Sci Adv. 2016 Jul 27;2(7):e1600031. eCollection 2016 Jul.

Nuclear respiratory factor 1 and endurance exercise promote human telomere transcription.

Author information

1
de Duve Institute, Université catholique de Louvain, Avenue Hippocrate 75, 1200 Brussels, Belgium.
2
Institute of Neuroscience, Université catholique de Louvain, Place Pierre de Coubertin 1, 1348 Louvain-la-Neuve, Belgium.
3
de Duve Institute, Université catholique de Louvain, Avenue Hippocrate 75, 1200 Brussels, Belgium.; Institute of Neuroscience, Université catholique de Louvain, Place Pierre de Coubertin 1, 1348 Louvain-la-Neuve, Belgium.
4
Pole of Cardiovascular Research, Institut de Recherche Expérimentale et Clinique, Université catholique de Louvain, Avenue Hippocrate 55, 1200 Brussels, Belgium.

Abstract

DNA breaks activate the DNA damage response and, if left unrepaired, trigger cellular senescence. Telomeres are specialized nucleoprotein structures that protect chromosome ends from persistent DNA damage response activation. Whether protection can be enhanced to counteract the age-dependent decline in telomere integrity is a challenging question. Telomeric repeat-containing RNA (TERRA), which is transcribed from telomeres, emerged as important player in telomere integrity. However, how human telomere transcription is regulated is still largely unknown. We identify nuclear respiratory factor 1 and peroxisome proliferator-activated receptor γ coactivator 1α as regulators of human telomere transcription. In agreement with an upstream regulation of these factors by adenosine 5'-monophosphate (AMP)-activated protein kinase (AMPK), pharmacological activation of AMPK in cancer cell lines or in normal nonproliferating myotubes up-regulated TERRA, thereby linking metabolism to telomere fitness. Cycling endurance exercise, which is associated with AMPK activation, increased TERRA levels in skeletal muscle biopsies obtained from 10 healthy young volunteers. The data support the idea that exercise may protect against aging.

KEYWORDS:

AMPK; NRF1; TERRA; Telomere; exercise

PMID:
27819056
PMCID:
PMC5087959
DOI:
10.1126/sciadv.1600031
[Indexed for MEDLINE]
Free PMC Article

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