Sentence examples for causes of lifespan from inspiring English sources

Experimentally, the addition of EAAs to DR (DR+EAA) offers a sharper instrument with which to dissect the potential causes of lifespan change in response to nutritional balance than the FF condition, which is achieved by increasing the concentration of dietary yeast.

Furthermore, oxygen saturation is >95% that of air at all food concentrations (Table S1), ruling out hypoxia as the cause of lifespan shortening at control food levels.

4) Why do daf-7 and tph-1 mutants cause extension of lifespan at some food concentrations but reduce it at others?

age-1 encodes the C. elegans ortholog of the phosphoinositide 3-kinase (PI3K) and the mutation hx546 causes an extension of lifespan by ~40% [ 14, 35].

Deletion of the SIR2 gene causes a decrease of lifespan, while insertion of an extra copy of SIR2 extends lifespan, indicating that like in S. cerevisiae, Sir2 regulates cellular aging in C. albicans.

Others have also observed that in yeast a decrease in TOR signaling resulted in lifespan extension, although these previous studies have implicated alterations in the stress resistance as the cause of this lifespan extension [ 5].

We analyzed the cause of this lifespan shortening and found that it depended on rDNA instability, which was only detectable in the mother cell (Fig. 3).

Recognizing that early control deaths might cause an overestimation of lifespan extension in mutants, we plotted and analyzed all survival curves with the first 20 days censored.

These observations point to the intricate nature of nutrient sensing and differential use of signalling cascades to transduce signals downstream of DR. Over the last few decades, several theories have evolved to explain causes of aging and lifespan extension.

Consistent with the involvement of this pathway, supplementation of the media with shikimic acid causes the lifespan of C. elegans on aroD mutant bacteria to revert to normal.

GHR−/− mice are completely resistance to GH action, which causes a reproducible extension of lifespan regardless of the genetic strain of mice [ 1, 2] and is officially recognized as the longest-lived laboratory mouse (http://methuselahfoundation.org/).org/