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Concept

Hallmarks of aging

Publications associées (24)

Regulation and impact of TERRA R-loops at human telomeres

Rita Valador Fernandes

Telomeres are the nucleoprotein structures found at the ends of linear chromosomes. They ensure that the termini of chromosomes are not inappropriately recognized as sites of DNA damage, and are therefore crucial for genome stability. In spite of the heter ...

EPFL2023

Gamified Motor Training With Tangible Robots in Older Adults: A Feasibility Study and Comparison With the Young

Pierre Dillenbourg, Friedhelm Christoph Hummel, Wafa Monia Benkaouar Johal, Maximilian Jonas Wessel, Arzu Güneysu Özgür, Ayberk Özgür, Jennifer Kaitlyn Olsen

Background: An increasing lifespan and the resulting change in our expectations of later life stages are dependent on a good health state. This emphasizes the importance of the development of strategies to further strengthen healthy aging. One important as ...

2020

Brain NAD Is Associated With ATP Energy Production and Membrane Phospholipid Turnover in Humans

Rolf Gruetter, Lijing Xin, Özlem Ipek, Maya Shevlyakova

The brain requires a large amount of energy, mostly derived from the metabolism of glucose, which decreases substantially with age and neurological diseases. While mounting evidence in model organisms illustrates the central role of brain nicotinamide aden ...

FRONTIERS MEDIA SA2020

Cross-species functional modules link proteostasis to human normal aging

Johan Auwerx, Hao Li, Vincenzo Sorrentino

The evolutionarily conserved nature of the few well-known anti-aging interventions that affect lifespan, such as caloric restriction, suggests that aging-related research in model organisms is directly relevant to human aging. Since human lifespan is a com ...

2019

Systems Phytohormone Responses to Mitochondrial Proteotoxic Stress

Johan Auwerx, Xu Wang

Mitochondrial function is controlled by two separate genomes. This feature makes mitochondria prone to proteotoxic stress when a stoichiometric imbalance occurs in the protein complexes that perform oxidative phosphorylation, which consist of both nucleara ...

Cell Press2017

Enhancing mitochondrial proteostasis reduces amyloid-beta proteotoxicity

Johan Auwerx, Adrian Schmid, Norman Lionel Moullan, Hongbo Zhang, Vincenzo Sorrentino, Davide D'Amico, Mario Romani

Alzheimer's disease is a common and devastating disease characterized by aggregation of the amyloid-beta peptide. However, we know relatively little about the underlying molecular mechanisms or how to treat patients with Alzheimer's disease. Here we provid ...

2017

Tandem affinity purification of AtTERT reveals putative interaction partners of plant telomerase in vivo

Jana Majerská

The life cycle of telomerase involves dynamic and complex interactions between proteins within multiple macromolecular networks. Elucidation of these associations is a key to understanding the regulation of telomerase under diverse physiological and pathol ...

Springer Wien2017

On-chip microfluidic biocommunication assay for studying male-induced demise in C. elegans hermaphrodites

Martinus Adela Maria Gijs, Thomas Lehnert, Matteo Cornaglia, Li Dong

Like other animals, C. elegans nematodes have the ability to socially interact and to communicate through exchange and sensing of small soluble signaling compounds that help them cope with complex environmental conditions. For the time being, worm biocommu ...

Royal Soc Chemistry2016

Two Conserved Histone Demethylases Regulate Mitochondrial Stress-Induced Longevity

Johan Auwerx, Laurent Mouchiroud, Evan Graehl Williams, Virginija Jovaisaite

Across eukaryotic species, mild mitochondrial stress can have beneficial effects on the lifespan of organisms. Mitochondrial dysfunction activates an unfolded protein response (UPR(mt)), a stress signaling mechanism designed to ensure mitochondrial homeost ...

Cell Press2016

SIRT1 Gain of Function Does Not Mimic or Enhance the Adaptations to Intermittent Fasting

Carlos Canto Alvarez, Patrick Descombes

Caloric restriction (CR) has been shown to prevent the onset of insulin resistance and to delay age-related physiological decline in mammalian organisms. SIRT1, a NAD(+) -dependent deacetylase enzyme, has been suggested to mediate the adaptive responses to ...

Elsevier2016

No DDRama at chromosome ends: TRF2 takes centre stage

Liuh-Yow Chen, Antonio Porro, Sascha Feuerhahn

Telomeres are nucleoprotein structures capping the natural termini of eukaryotic linear chromosomes. Telomeres possess an inherent ability to circumvent the activation of a full-blown DNA damage response (DDR), and hence fusion reactions, by limiting inapp ...

Elsevier Science London2015

Serum profiling of healthy aging identifies phospho- and sphingolipid species as markers of human longevity

As centenarians well represent the model of healthy aging, there are many important implications in revealing the underlying molecular mechanisms behind such successful aging. By combining NMR metabonomics and shot-gun lipidomics in serum we analyzed metab ...

Impact Journals Llc2014

Proteostasis: Bad news and good news from the endoplasmic reticulum

Maurizio Molinari

The endoplasmic reticulum (ER) is an intracellular compartment dedicated to the synthesis and maturation of secretory and membrane proteins, totalling about 30% of the total eukaryotic cells proteome. The capacity to produce correctly folded polypeptides a ...

E M H Swiss Medical Publishers Ltd2014

A Quantitative Telomeric Chromatin Isolation Protocol (Q-TIP) to Characterize Telomere Composition Changes

Larissa Grolimund

Telomeres protect linear ends of eukaryotic chromosomes by preventing chromosomal end-to-end fusions and telomere attrition. They consist of repetitive DNA sequences, telomeric repeat containing RNAs (TERRAs) and proteins. Telomeres play a crucial role in ...

EPFL2013

A three-state model for the regulation of telomerase by TERRA and hnRNPA1

Joachim Lingner, Sophie Redon, Ivo Zemp

Telomeres, the physical ends of eukaryotic chromosomes, are transcribed into telomeric repeat-containing RNA (TERRA), a large non-coding RNA, which forms an integral part of telomeric heterochromatin. In vitro, naked TERRA molecules are efficient inhibitor ...

Oxford University Press2013

Telomeric Repeat Containing RNAs and the Response to Telomere Deprotection in Saccharomyces Cerevisiae

Andrea Bernardo Panza

Telomeres are the DNA/RNA/protein structures at the end of linear eukaryotic chromosomes, which protect them against the DNA damage repair machinery, preventing chromosome end-to-end fusions and aberrant recombination. Moreover, telomeres compensate for th ...

EPFL2012

Role of the FoxO3a Transcription Factor in alpha-synuclein Induced Neurodegeneration

Emilda Pino

Increased expression of α-synuclein and point mutations in its amino acid sequence play a causative role in familial forms of Parkinson's disease (PD). In addition, circumstances affecting the level of α-synuclein expression significantly increase the risk ...

EPFL2012

The human CST complex is a terminator of telomerase activity

Joachim Lingner, Liuh-Yow Chen, Sophie Redon

The lengths of human telomeres, which protect chromosome ends from degradation and end fusions(1,2), are crucial determinants of cell lifespan(3). During embryogenesis and in cancer, the telomerase enzyme counteracts telomeric DNA shortening. As shown in c ...

Nature Publishing Group2012

Calorie restriction: is AMPK a key sensor and effector?

Johan Auwerx, Carlos Canto Alvarez

Dietary restriction can extend life span in most organisms tested to date, suggesting that mechanisms sensing nutrient and energy availability might regulate longevity. The AMP-activated protein kinase (AMPK) has emerged as a key energy sensor with the abi ...

2011

Telomere dysfunction induces environmental alterations limiting hematopoietic stem cell function and engraftment

Cell-intrinsic checkpoints limit the proliferative capacity of primary cells in response to telomere dysfunction. It is not known, however, whether telomere dysfunction contributes to cell-extrinsic alterations that impair stem cell function and organ home ...

2007