The slim, the fat, and the obese: guess who lives the longest?
| Autor: | Min Hao Kuo, Witawas Handee, Xiaobo Li |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
0301 basic medicine
Senescence Aging Longevity Population Overweight Biology 03 medical and health sciences Life Expectancy Stress Physiological Yeasts Phenomenon Genetics medicine Animals Humans Obesity Positive economics education Triglycerides Simple (philosophy) education.field_of_study Body Weight General Medicine Lipid Metabolism medicine.disease 030104 developmental biology Adipose Tissue Biochemistry Energy expenditure medicine.symptom Reactive Oxygen Species Obesity paradox |
| Zdroj: | Current Genetics. 63:43-49 |
| ISSN: | 1432-0983 0172-8083 |
| Popis: | In a modern society that is increasingly older and "heavier," it is understandable that the majority favors a slimmer body that helps to sail smoothly into the dusk of life. Given the association between obesity and many metabolic and cardiovascular disorders, there are stern criticisms over such a thought of "good fat". Ironically, a phenomenon called "obesity paradox", that is, the overweight population purportedly enjoys the lowest all-cause mortality, and baffles open-minded clinicians and scientists. Lipids are essential to all life forms. Fat, in particular, triacylglycerol, also exists in different forms and in different locations in the human body, making any simple statement that vilifies all fat invalid. Whether the phenomenon of obesity paradox, indeed, has its root in a hitherto unrealized pro-survival function of fat deserves a serious look. Indeed, a recent publication using yeast as the model showed that elevation in the cellular storage of triacylglycerol extends lifespan in an energy expenditure independent fashion. In stark contrast, lean cells devoid of triacylglycerol biosynthetic capability die upon entering the senescence phase. Together, a new cytoprotective function of fat emerges. This mini-review aims to discuss potential mechanisms for the observed lifespan preservation function of triacylglycerol. |
| Databáze: | OpenAIRE |
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