Circadian rhythm in mRNA expression of the glutathione synthesis gene Gclc is controlled by peripheral glial clocks in Drosophila melanogaster

Physiological Entomology
Eileen S ChowJadwiga M Giebultowicz

Abstract

Circadian coordination of metabolism, physiology, and behaviour is found in all living kingdoms. Clock genes are transcriptional regulators, and their rhythmic activities generate daily rhythms in clock-controlled genes which result in cellular and organismal rhythms. Insects provide numerous examples of rhythms in behaviour and reproduction, but less is known about control of metabolic processes by circadian clocks in insects. Recent data suggest that several pathways involved in protecting cells from oxidative stress may be modulated by the circadian system, including genes involved in glutathione (GSH) biosynthesis. Specifically, rhythmic expression of the gene encoding the catalytic subunit (Gclc) of the rate-limiting GSH biosynthetic enzyme was detected in Drosophila melanogaster heads. The aim of this study was to determine which clocks in the fly multi-oscillatory circadian system are responsible for Gclc rhythms. Genetic disruption of tissue-specific clocks in D. melanogaster revealed that transcriptional rhythms in Gclc mRNA levels occur independently of the central pacemaker neurons, because these rhythms persisted in heads of behaviourally arrhythmic flies with a disabled central clock but intact peripheral clocks. D...Continue Reading

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Citations

Jan 30, 2018·Frontiers in Physiology·Dani M Long, Jadwiga M Giebultowicz
Aug 28, 2020·Frontiers in Physiology·Milena DamulewiczElzbieta M Pyza
Dec 5, 2021·FEBS Letters·Evrim YildirimDae-Sung Hwangbo

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