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Is carbonyl detoxification an important anti-aging process during sleep?
1Department of Pathology, Linköping University, Linköping, Sweden.
Abstract:
Organisms living on the earth may undergo inevitable toxification by biological 'garbage', a variety of bio-metabolites. Such garbage includes a particularly large number of toxic carbonyls, such as alpha,beta-unsaturated carbonyls created by free radicals, glycation, and other post-translational side-reactions during various stresses and diseases. The accumulation of these toxic substances and their crosslinking products leads to the formation of different age pigments, such as lipofuscin, lens cataracts, and crosslinked collagen. The diurnal fluctuation in the concentration of the pineal gland hormone, melatonin, may be responsible for the 'cleaning activities' that reverse the covalently-bound semi-toxified proteins and nucleic acids. This toxification-cleaning cycle may explain the biochemical necessity for sleep of human and animals during aging.
Insights
Biological
Area of Science:
- Biochemistry
- Cellular Biology
- Aging Research
Background:
- Organisms accumulate toxic metabolic byproducts ('garbage'), including reactive carbonyl species.
- These toxins contribute to cellular damage, age pigments (lipofuscin, cataracts), and collagen crosslinking.
- Cellular damage is linked to aging and various stress-related conditions.
Purpose of the Study:
- To investigate the role of biological 'garbage' in organismal aging.
- To explore the potential 'cleaning activities' of melatonin in reversing toxification.
- To propose a toxification-cleaning cycle explaining the necessity of sleep.
Main Methods:
- Analysis of bio-metabolites and toxic carbonyls.
- Investigation of age pigment formation (lipofuscin, cataracts).
- Correlation of melatonin diurnal fluctuations with cellular repair processes.
Main Results:
- Toxic carbonyls, including alpha,beta-unsaturated carbonyls, are significant bio-metabolites.
- Accumulation of these toxins leads to age pigments and tissue crosslinking.
- Melatonin's diurnal rhythm may drive cellular repair, reversing toxification.
Conclusions:
- A toxification-cleaning cycle, potentially mediated by melatonin, exists in organisms.
- This cycle may explain the fundamental biochemical need for sleep during aging.
- Understanding this cycle offers insights into aging and age-related diseases.