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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Ann+Med
2014 ; 46
(4
): 208-20
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Circadian gene variants in cancer
#MMPMID24901356
Kettner NM
; Katchy CA
; Fu L
Ann Med
2014[Jun]; 46
(4
): 208-20
PMID24901356
show ga
Humans as diurnal beings are active during the day and rest at night. This daily
oscillation of behavior and physiology is driven by an endogenous circadian clock
not environmental cues. In modern societies, changes in lifestyle have led to a
frequent disruption of the endogenous circadian homeostasis leading to increased
risk of various diseases including cancer. The clock is operated by the feedback
loops of circadian genes and controls daily physiology by coupling cell
proliferation and metabolism, DNA damage repair, and apoptosis in peripheral
tissues with physical activity, energy homeostasis, immune and neuroendocrine
functions at the organismal level. Recent studies have revealed that defects in
circadian genes due to targeted gene ablation in animal models or single
nucleotide polymorphism, deletion, deregulation and/or epigenetic silencing in
humans are closely associated with increased risk of cancer. In addition,
disruption of circadian rhythm can disrupt the molecular clock in peripheral
tissues in the absence of circadian gene mutations. Circadian disruption has
recently been recognized as an independent cancer risk factor. Further study of
the mechanism of clock-controlled tumor suppression will have a significant
impact on human health by improving the efficiencies of cancer prevention and
treatment.