The impact of α-lipoic acid, coenzyme Q10, and caloric restriction on life span and gene expression patterns in mice
ABSTRACT We evaluated the efficacy of three dietary interventions started at middle age (14 months) to retard the aging process in mice. These were supplemental alpha-lipoic acid (LA) or coenzyme Q(10) (CQ) and caloric restriction (CR, a positive control). LA and CQ had no impact on longevity or tumor patterns compared with control mice fed the same number of calories, whereas CR increased maximum life span by 13% (p <.0001) and reduced tumor incidence. To evaluate these interventions at the molecular level, we used microarrays to monitor the expression of 9977 genes in hearts from young (5 months) and old (30 months) mice. LA, CQ, and CR inhibited age-related alterations in the expression of genes involved in the extracellular matrix, cellular structure, and protein turnover. However, unlike CR, LA and CQ did not prevent age-related transcriptional alterations associated with energy metabolism. LA supplementation lowered the expression of genes encoding major histocompatibility complex components and of genes involved in protein turnover and folding. CQ increased expression of genes involved in oxidative phosphorylation and reduced expression of genes involved in the complement pathway and several aspects of protein function. Our observations suggest that supplementation with LA or CQ results in transcriptional alterations consistent with a state of reduced oxidative stress in the heart, but that these dietary interventions are not as effective as CR in inhibiting the aging process in the heart.
- SourceAvailable from: Gerald Rimbach
[Show abstract] [Hide abstract]
- "Received 17 December 2013; accepted 24 January 2014 DOI 10.1002/biof.1160 Published online 27 February 2014 in Wiley Online Library (wileyonlinelibrary.com) biosynthesis as well as a cofactor of uncoupling proteins  and has also been identified as a modulator of gene expression   , inflammatory processes   , and apoptosis  . Due to these roles, deficiency of CoQ is involved in several diseases most of them associated with the ageing process including neuromuscular disorders . "
ABSTRACT: Coenzyme Q derivatives (CoQ) are lipid soluble antioxidants that are synthesized endogenously in almost all species and function as an obligatory cofactor of the respiratory chain. There is evidence that CoQ status is altered by age in several species. Here we determined level and redox-state of CoQ in different age groups of pigs, mice and Caenorhabditis elegans. Since these species are very different with respect to lifespan, reproduction and physiology, our approach could provide some general tendencies of CoQ status in ageing organisms. We found that CoQ level decreases with age in pigs and mice, whereas CoQ content increases in older worms. As observed in all three species, ubiquinone, the oxidized form of CoQ, increases with age. Additionally, we were able to show that supplementation of ubiquinol-10, the reduced form of human CoQ10 , slightly increases lifespan of post-reproductive worms. In conclusion, the percentage of the oxidized form of CoQ increases with age indicating higher oxidative stress or rather a decreased anti-oxidative capacity of aged animals. © 2014 BioFactors, 2014.BioFactors 05/2014; 40(3). DOI:10.1002/biof.1160 · 3.00 Impact Factor
[Show abstract] [Hide abstract]
- "Species Treatment 1 Treatment 2 M1 (g) M2 (g) LS1 (days) LS2 (days) References Balb/C mice DR started at 22-day old DR started at 120-day old 29.3 29.2 641 647 Stoltzner (1977) B/W mice Free fed; 49% protein in diet; same calorie as treatment 2 Free fed; 15% protein in diet; same calorie as treatment 1 38 38.6 280 295 Gajjar et al. (1987) C57BL/6 mice Add Alpha lipoic acid to diet add Coenzyme Q10 to diet 44 44 939 926 Lee et al. (2004) "
ABSTRACT: Understanding the trade-offs between organisms' life history traits has been a major goal of physiology, ecology and evolution. In the last few decades, two types of intra-specific studies have highlighted the trade-off between growth and longevity. First, diet restriction (DR), as an environmental intervention, has been shown to suppress growth and extend the lifespan of a broad range of animals. Second, genetic studies have also shown that mice, whose growth hormone function is genetically modified (GM), grow slower and live longer than their wild-type siblings. Despite a wealth of empirical data, still largely missing is a theoretical framework that specifies and makes quantitative predictions on this trade-off. Here, I present a mechanistic model based on the principles of energy conservation. The model quantifies explicitly how DR and GM alter the animal's energy budget, and channel metabolic energy to somatic maintenance by suppressing growth, thereby extending lifespan. Data from a diverse set of empirical studies on small rodents supports the predictions of the model. More importantly, the model reveals that although DR and GM are two different methods to extend lifespan, i.e., environmental vs. genetic, the underlying mechanisms of them are the same from the energetic viewpoint.Mechanisms of ageing and development 07/2013; 134(9). DOI:10.1016/j.mad.2013.07.001 · 3.51 Impact Factor
[Show abstract] [Hide abstract]
- "Pre-treatment with coenzyme Q 10 improves the functional recovery of senescent rat hearts after aerobic stress and the heart contractile function of elderly patients after cardiac surgery (Rosenfeldt et al., 2002). α-lipoic acid and coenzyme Q 10 supplementation inhibit age-related alterations in the expression of genes involved in the extracellular matrix, cellular structure, and protein turnover, but have no impact on longevity or tumor patterns compared with those in control mice (Lee et al., 2004). Dietary supplementation with acetyl-Lcarnitine in rats reverses the age-associated decline in mitochondrial function (Hagen et al., 1998). "
ABSTRACT: Buckwheat (Fagopyrum esculentum) has been known for having strong anti-oxidant, anti-mutagenic, and anti-carcinogenic activities. The free radical theory of aging, also known as the oxidative stress theory of aging, claims that cellular oxidative damage accumulated with time is a major causal factor of aging. In the present study, we investigated the effect of buckwheat extracts on resistance to oxidative stress and aging using Caenorhabditis elegans as a model system. Survival under an oxidative-stress condition induced by paraquat increased markedly following 500mg/L buckwheat extracts treatment, suggesting lower cellular oxidative damage by buckwheat extracts. A lifespan assay also revealed that treatment of buckwheat extracts significantly extended both the mean and maximum lifespan in C. elegans. Interestingly, this lifespan-extension by buckwheat extracts was not accompanied by reduced fertility. These findings suggest that buckwheat extracts can confer longevity phenotype to C. elegans through its strong anti-oxidant activity and support the aging theory which emphasizes a pivotal role of oxidative stress during aging.02/2013; 21(1). DOI:10.7783/KJMCS.2013.21.1.1