Buffering the pH of the culture medium does not extend yeast replicative lifespan
نویسندگان
چکیده
During chronological aging of budding yeast cells, the culture medium can become acidified, and this acidification limits cell survival. As a consequence, buffering the culture medium to pH 6 significantly extends chronological life span under standard conditions in synthetic medium. In this study, we assessed whether a similar process occurs during replicative aging of yeast cells. We find no evidence that buffering the pH of the culture medium to pH levels either higher or lower than the initial pH of the medium is able to significantly extend replicative lifespan. Thus, we conclude that, unlike chronological life span, replicative life span is not limited by acidification of the culture medium or by changes in the pH of the environment.
منابع مشابه
Chronological and replicative lifespan in yeast
Budding yeast is a preeminent model organism in studies of cellular aging pathways that are conserved in eukaryotes, including humans. There are two primary ways to query the lifespan of this organism.1 if one asks how many times a cell can divide, the answer will be its replicative lifespan (RLS). if, on the other hand, one asks how long a cell can stay alive without dividing, the answer will ...
متن کاملAcetic acid and acidification accelerate chronological and replicative aging in yeast
Budding yeast is a preeminent model organism in studies of cellular aging pathways that are conserved in eukaryotes, including humans. There are two primary ways to query the lifespan of this organism.1 if one asks how many times a cell can divide, the answer will be its replicative lifespan (RLS). if, on the other hand, one asks how long a cell can stay alive without dividing, the answer will ...
متن کاملCyclin D1 goes metabolic
Budding yeast is a preeminent model organism in studies of cellular aging pathways that are conserved in eukaryotes, including humans. There are two primary ways to query the lifespan of this organism.1 if one asks how many times a cell can divide, the answer will be its replicative lifespan (RLS). if, on the other hand, one asks how long a cell can stay alive without dividing, the answer will ...
متن کاملA role for protein phosphatase 4 in regulating non-homologous end-joining
Budding yeast is a preeminent model organism in studies of cellular aging pathways that are conserved in eukaryotes, including humans. There are two primary ways to query the lifespan of this organism.1 if one asks how many times a cell can divide, the answer will be its replicative lifespan (RLS). if, on the other hand, one asks how long a cell can stay alive without dividing, the answer will ...
متن کاملIndependent and Additive Effects of Glutamic Acid and Methionine on Yeast Longevity
It is established that glucose restriction extends yeast chronological and replicative lifespan, but little is known about the influence of amino acids on yeast lifespan, although some amino acids were reported to delay aging in rodents. Here we show that amino acid composition greatly alters yeast chronological lifespan. We found that non-essential amino acids (to yeast) methionine and glutami...
متن کامل