Stress response in tardigrades: differential gene expression of molecular chaperones.

Cell Stress & Chaperones
A ReunerRalph O Schill

Abstract

Semi-terrestrial tardigrades exhibit a remarkable tolerance to desiccation by entering a state called anhydrobiosis. In this state, they show a strong resistance against several kinds of physical extremes. Because of the probable importance of stress proteins during the phases of dehydration and rehydration, the relative abundance of transcripts coding for two alpha-crystallin heat-shock proteins (Mt-sHsp17.2 and Mt-sHsp19.5), as well for the heat-shock proteins Mt-sHsp10, Mt-Hsp60, Mt-Hsp70 and Mt-Hsp90, were analysed in active and anhydrobiotic tardigrades of the species Milnesium tardigradum. They were also analysed in the transitional stage (I) of dehydration, the transitional stage (II) of rehydration and in heat-shocked specimens. A variable pattern of expression was detected, with most candidates being downregulated. Gene transcripts of one Mt-hsp70 isoform in the transitional stage I and Mt-hsp90 in the anhydrobiotic stage were significantly upregulated. A high gene expression (778.6-fold) was found for the small alpha-crystallin heat-shock protein gene Mt-sHsp17.2 after heat shock. We discuss the limited role of the stress-gene expression in the transitional stages between the active and anhydrobiotic tardigrades and o...Continue Reading

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Citations

Oct 11, 2011·Neurochemical Research·Jonathan E FernsNorbert W Seidler
Mar 29, 2011·Journal of Insect Physiology·Weronika WełniczMarcus Frohme
Jun 17, 2016·Scientific Reports·Jian ZhangJianjun Qiao
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Sep 29, 2019·Journal of Cell Science·Maria B HeimlicherDamian Brunner
Oct 6, 2020·Communicative & Integrative Biology·Ricardo Cardoso NevesNadja Møbjerg
Feb 22, 2018·Proceedings of the National Academy of Sciences of the United States of America·Pavel V MazinOleg Gusev
Nov 17, 2020·Frontiers in Physiology·Jonathan D HibshmanBob Goldstein

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