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Circadian Proteomics Reassesses the Temporal Regulation of Metabolic Rhythms by Chlamydomonas Clock.

Plant Cell Environ

January 2025

Department of Biology, Trivedi School of Biosciences, Ashoka University, Sonipat, India.

Circadian clocks execute temporal regulation of metabolism by modulating the timely expression of genes. Clock regulation of mRNA synthesis was envisioned as the primary driver of these daily rhythms. mRNA oscillations often do not concur with the downstream protein oscillations, revealing the importance to study protein oscillations.

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Circadian rhythm is a physiological process that oscillates in a 24 h cycle. It has a complex connection with the function of the human immune system and even with the development of tumours. Previous studies demonstrated the time-dependent effects of chemotherapy and radiotherapy; however, there are few studies on the timing effects of immunotherapy.

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Effect of temperature on circadian clock functioning of trees in the context of global warming.

New Phytol

January 2025

Instituto de Investigaciones Forestales y Agropecuarias Bariloche, Instituto Nacional de Tecnología Agropecuaria, Estación Experimental Bariloche - Consejo Nacional de Investigaciones Científicas y Técnicas (INTA EEA Bariloche-CONICET), San Carlos de Bariloche, Río Negro, R8403DVZ, Argentina.

Plant survival in a warmer world requires the timely adjustment of biological processes to cyclical changes in the new environment. Circadian oscillators have been proposed to contribute to thermal adaptation and plasticity. However, the influence of temperature on circadian clock performance and its impact on plant behaviour in natural ecosystems are not well-understood.

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Purpose: Chronic jet lag (CJL) is known to disrupt circadian rhythms, which regulate various physiological processes, including ocular surface homeostasis. However, the specific effects of CJL on lacrimal gland function and the underlying cellular mechanisms remain poorly understood.

Methods: A CJL model was established using C57BL/6J mice.

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Individualized temporal patterns drive human sleep spindle timing.

Proc Natl Acad Sci U S A

January 2025

Division of Sleep and Circadian Disorders, Brigham and Women's Hospital, Boston, MA 02115.

Sleep spindles are cortical electrical oscillations considered critical for memory consolidation and sleep stability. The timing and pattern of sleep spindles are likely to be important in driving synaptic plasticity during sleep as well as preventing disruption of sleep by sensory and internal stimuli. However, the relative importance of factors such as sleep depth, cortical up/down-state, and temporal clustering in governing sleep spindle dynamics remains poorly understood.

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