The timing clockwork of life

G. Mazzoccoli

Article ID: 6197
Vol 25, Issue 1, 2011
DOI: https://doi.org/10.54517/jbrha6197
Received: 8 April 2011; Accepted: 8 April 2011; Available online: 8 April 2011; Issue release: 8 April 2011

Abstract

Many aspects of human physiology, metabolism and behaviour vary over the 24-hour day and can have a major impact on our health and well-being. Circadian rhythms are observed at all levels of cellular organization. There are daily oscillations in the levels of enzymes and hormones that affect the timing of cell function, division, and growth. Recent progress in understanding the molecular mechanisms underlying circadian rhythms has been remarkable. In its most basic form, circadian clocks are comprised of a set of proteins that generate a self-sustaining transcriptional-translational feedback loop with a free-running period of about 24 h. One or more of the clock components is acutely sensitive to light, resulting in an oscillator that can be synchronized to local time. The disruption or the reinforcement of the host circadian timing system, respectively, accelerates or slows down cancer growth through modifications of host and tumor circadian clocks


Keywords

circadian rhythmicity;clock genes;cell cycle;tumor suppression;tumorigenesis


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Supporting Agencies



Copyright (c) 2011 G. Mazzoccoli




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