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Sirtuins, melatonin and circadian rhythms: building a bridge between aging and cancer
Brittney Jung-Hynes1, Russel J Reiter, Nihal Ahmad
1Department of Dermatology, University of Wisconsin, Madison, WI 53706, USA.
Abstract:
Histone deacetylases (HDAC) have been under intense scientific investigation for a number of years. However, only recently the unique class III HDAC, sirtuins, have gained increasing investigational momentum. Originally linked to longevity in yeast, sirtuins and more specifically, SIRT1 have been implicated in numerous biological processes having both protective and/or detrimental effects. SIRT1 appears to play a critical role in the process of carcinogenesis, especially in age-related neoplasms. Similarly, alterations in circadian rhythms as well as production of the pineal hormone melatonin have been linked to aging and cancer risk. Melatonin has been found act as a differentiating agent in some cancer cells and to lower their invasive and metastatic status. In addition, melatonin synthesis and release occurs in a circadian rhythm fashion and it has been linked to the core circadian machinery genes (Clock, Bmal1, Periods, and Cryptochromes). Melatonin has also been associated with chronotherapy, the timely administration of chemotherapy agents to optimize trends in biological cycles. Interestingly, a recent set of studies have linked SIRT1 to the circadian rhythm machinery through direct deacetylation activity as well as through the nicotinamide adenine dinucleotide (NAD(+)) salvage pathway. In this review, we provide evidence for a possible connection between sirtuins, melatonin, and the circadian rhythm circuitry and their implications in aging, chronomodulation, and cancer.
Insights
This review explores the link between sirtuins (class III HDACs), melatonin, and circadian rhythms. These factors are implicated in aging, cancer, and chronotherapy, suggesting potential therapeutic strategies.
Area of Science:
- Molecular Biology
- Oncology
- Chronobiology
Background:
- Sirtuins (class III HDACs) are increasingly studied for roles in aging and cancer.
- Melatonin, a pineal hormone, influences circadian rhythms and has anti-cancer properties.
- Circadian rhythm disruptions are linked to aging and increased cancer risk.
Purpose of the Study:
- To review the interconnectedness of sirtuins, melatonin, and circadian rhythms.
- To explore their combined implications in aging, cancer, and chronomodulation.
- To highlight potential therapeutic applications in chronotherapy.
Main Methods:
- Literature review of studies on sirtuins, melatonin, and circadian rhythms.
- Analysis of molecular mechanisms linking these pathways.
- Synthesis of evidence regarding their roles in aging and cancer.
Main Results:
- SIRT1 is linked to carcinogenesis and circadian machinery.
- Melatonin exhibits anti-cancer effects and is tied to circadian genes.
- SIRT1 interacts with circadian pathways via deacetylation and NAD+ salvage.
Conclusions:
- A potential connection exists between sirtuins, melatonin, and circadian circuitry.
- This interplay is relevant to aging, cancer development, and treatment strategies.
- Further research may uncover novel therapeutic targets for age-related diseases and cancer.
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