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Differences in gene modulation in Saccharomyces cerevisiae indicate that maturity plays an important role in the high hydrostatic pressure stress response and resistance
Fungal Biology ( IF 2.9 ) Pub Date : 2020-05-01 , DOI: 10.1016/j.funbio.2019.11.010
Brígida A A Spagnol 1 , Tathiana F S Antunes 1 , Oeber F Quadros 1 , A Alberto R Fernandes 1 , Patricia M B Fernandes 1
Affiliation  

There is a strong relationship between the regulatory pathways to oxidative stress, longevity, and aging. High hydrostatic pressure (HHP) induces oxidative stress and activates cellular defense mechanisms. The understanding of these mechanisms is a strategy to delay damage associated with aging. Addressing resistance to stress and aging in Saccharomyces cerevisiae is a well-accepted approach since pathways involved in energy balance, damage accumulation and stress response are preserved among eukaryotes. The purpose of this study was to correlate the environmental stress response to cell maturity. HHP stress response on S. cerevisiae mother and daughter cells was evaluated through survival, reactive oxygen species (ROS) accumulation and gene expression. Mature cells were yeasts that had budded and originated at least one descendant, and young cells were the ones that did not form a bud. Mature cells were more resistant to HHP, although they showed a decrease in expression of antioxidants enzymes genes, and a higher intracellular levels of ROS. Young cells had less resistance to HHP despite a tendency of positively regulating these same antioxidant encoders. The TOR1 gene, related to aging and apoptosis, was unchanged in mother cells and showed a tendency toward increased expression in daughter cells submitted to HHP. The gene modulation differences of the mother and daughter cells indicates that maturity plays an important role in the HHP stress response and resistance. Thus, even accumulating high levels of ROS, mature cells were more tolerant to HHP stress and survived better, despite aging.

中文翻译:

酿酒酵母中基因调控的差异表明成熟度在高静水压力应激反应和抵抗中起着重要作用

氧化应激、长寿和衰老的调节途径之间存在密切关系。高静水压 (HHP) 会诱导氧化应激并激活细胞防御机制。了解这些机制是一种延缓衰老相关损伤的策略。解决酿酒酵母对压力和衰老的抵抗是一种广为接受的方法,因为参与能量平衡、损伤积累和压力反应的途径在真核生物中得以保留。本研究的目的是将环境应激反应与细胞成熟相关联。HHP 对酿酒酵母母细胞和子细胞的应激反应通​​过存活、活性氧 (ROS) 积累和基因表达进行评估。成熟细胞是出芽并起源于至少一个后代的酵母,年轻的细胞是那些没有形成芽的细胞。成熟细胞对 HHP 的抵抗力更强,尽管它们表现出抗氧化剂酶基因的表达减少,以及细胞内 ROS 的水平更高。尽管倾向于积极调节这些相同的抗氧化剂编码器,但年轻细胞对 HHP 的抵抗力较低。与衰老和细胞凋亡相关的 TOR1 基因在母细胞中没有变化,并且在接受 HHP 的子细胞中表现出表达增加的趋势。母细胞和子细胞的基因调控差异表明成熟在HHP应激反应和抵抗中起重要作用。因此,即使积累了高水平的 ROS,成熟细胞对 HHP 压力的耐受性也更强,尽管会老化,但存活得更好。尽管它们表现出抗氧化剂酶基因表达的减少和更高的细胞内活性氧水平。尽管倾向于积极调节这些相同的抗氧化剂编码器,但年轻细胞对 HHP 的抵抗力较低。与衰老和细胞凋亡相关的 TOR1 基因在母细胞中没有变化,并且在接受 HHP 的子细胞中表现出表达增加的趋势。母细胞和子细胞的基因调控差异表明成熟在HHP应激反应和抵抗中起重要作用。因此,即使积累了高水平的 ROS,成熟细胞对 HHP 压力的耐受性也更强,尽管会老化,但存活得更好。尽管它们表现出抗氧化剂酶基因表达的减少和更高的细胞内活性氧水平。尽管倾向于积极调节这些相同的抗氧化剂编码器,但年轻细胞对 HHP 的抵抗力较低。与衰老和细胞凋亡相关的 TOR1 基因在母细胞中没有变化,并且在接受 HHP 的子细胞中表现出表达增加的趋势。母细胞和子细胞的基因调控差异表明成熟在HHP应激反应和抵抗中起重要作用。因此,即使积累了高水平的 ROS,成熟细胞对 HHP 压力的耐受性也更强,尽管会老化,但存活得更好。尽管倾向于积极调节这些相同的抗氧化剂编码器,但年轻细胞对 HHP 的抵抗力较低。与衰老和细胞凋亡相关的 TOR1 基因在母细胞中没有变化,并且在接受 HHP 的子细胞中表现出表达增加的趋势。母细胞和子细胞的基因调控差异表明成熟在HHP应激反应和抵抗中起重要作用。因此,即使积累了高水平的 ROS,成熟细胞对 HHP 压力的耐受性也更强,尽管会老化,但存活得更好。尽管倾向于积极调节这些相同的抗氧化剂编码器,但年轻细胞对 HHP 的抵抗力较低。与衰老和细胞凋亡相关的 TOR1 基因在母细胞中没有变化,并且在接受 HHP 的子细胞中表现出表达增加的趋势。母细胞和子细胞的基因调控差异表明成熟在HHP应激反应和抵抗中起重要作用。因此,即使积累了高水平的 ROS,成熟细胞对 HHP 压力的耐受性也更强,尽管会老化,但存活得更好。母细胞和子细胞的基因调控差异表明成熟在HHP应激反应和抵抗中起重要作用。因此,即使积累了高水平的 ROS,成熟细胞对 HHP 压力的耐受性也更强,尽管会老化,但存活得更好。母细胞和子细胞的基因调控差异表明成熟在HHP应激反应和抵抗中起重要作用。因此,即使积累了高水平的 ROS,成熟细胞对 HHP 压力的耐受性也更强,尽管会老化,但存活得更好。
更新日期:2020-05-01
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