Knockout ofHsp70genes significantly affects locomotion speed and gene expression in leg skeletal muscles of Drosophila melanogaster

Makhnovskii, P.A.; Kukushkina, I.V.; Kurochkina, N.S.; Popov, D.V.

Авторы: Makhnovskii Pavel A., Kukushkina Inna V., Kurochkina Nadia S., Popov Daniil V.
Журнал: bioRxiv (The preprint server for biology)
Номер: 2023-12
Год издания: 2023
DOI: 10.1101/2023.12.01.569551
Аннотация: The functions of the Hsp70 genes were studied using a line of D. melanogaster with knockout of six these genes out of thirteen. Namely, the effect of knockout of Hsp70 genes on negative geotaxis climbing (locomotor) speed and the ability to adapt to climbing training (1.5 h/day, 7 days/week, 3 weeks) were examined. Seven- and 23-day-old Hsp70– flies demonstrated a comparable reduction (2-fold) in locomotor speed and widespread changes in leg skeletal muscle transcriptome (RNA-seq), compared to the w1118 flies. To identify the functions of genes related to decreased locomotor speed the overlapped differentially expressed genes at both time points were analyzed: the up-regulated genes encoded extracellular proteins, regulators of drug metabolism and antioxidant response, while down-regulated genes encoded regulators of carbohydrate metabolism and transmembrane proteins. Additionally, in the Hsp70– flies, activation of transcription factors related to disruption of the fibril structure and heat shock response (Hsf) were predicted, using the position weight matrix approach. In the control flies, adaptation to regular exercise training was associated mainly with gene response to a single exercise, while the predicted transcription factors were related to stress/immune (Hsf, NF-kB, etc.) and early gene response. In contrast, the Hsp70– flies demonstrated no adaptation to training, as well as significantly impaired gene response to a single exercise. In conclusion, the knockout of Hsp70 genes not only reduced physical performance, but also disrupted adaptation to regular physical training, which is associated with changes in leg skeletal muscle transcriptome and impaired gene response to an exercise.
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Knockout ofHsp70genes significantly affects locomotion speed and gene expression in leg skeletal muscles of Drosophila melanogasterстатья

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