Mitochondria from females exhibit higher antioxidant gene expression and lower oxidative damage than males

Borrás, Consuelo; Sastre, Juan; García-Sala, David; Lloret, Ana; Pallardó, Federico V.; Viña, José

doi:10.1016/s0891-5849(02)01356-4

Cited by 555 publications

(445 citation statements)

References 35 publications

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“…Also, our results showed that in aged males the level of LPO in the serum was more than that in females. This may result from the protective role of estrogen against agerelated diseases due to estrogen replacement [32].…”

Section: Discussionmentioning

confidence: 99%

Protictive effects of green tea and garlic on the morphological and oxidative stress changes of hippocampus in aged male and female albino rats

El‐Sokkary¹,

Alghriany²,

Atia³

2018

J Histol Histopathol

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Objective: Green tea is an extremely popular drink and particularly rich in strong antioxidants, flavonoids. Also, garlic is important dietary and has medicinal role for centuries and possess both antioxidant and antiinflammatory action in several oxidative stress conditions. Materials and methods: Four groups of both male and female rats [young (3 months-old), aged (26 months-old), aged+green tea (200 mg/kg) and aged+garlic (100 mg/kg)] were used. Histological changes in the pyramidal cells of the hippocampus were examined. Levels of oxidized lipids (LPO), superoxide dismutase (SOD) activity and glutathione concentration (GSH) were measured in the serum. Results: Irregular, shrinked and deeply stained large and small pyramidal cells with fragmented nuclei and basophilic cytoplasm observed in the hippocampus of aged male and female rats. Green tea and garlic administration preserve these changes in the pyramidal cells in both genders. Aging increased the level of LPO, decreased the activity of SOD and the concentration of GSH of both male and female rats versus those of young ones. Again, green tea and garlic ameliorated these changes. Conclusion: our results showed that the protective role of green tea and garlic against oxidative stress parameters was more effective in males than females. Morphologically, garlic exerted preservation to the pyramidal cells of hippocampus more than green tea in both genders. This study suggests that the use of both green tea and garlic may inhibit the bodily changes related to aging.

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Section: Discussionmentioning

confidence: 99%

Protictive effects of green tea and garlic on the morphological and oxidative stress changes of hippocampus in aged male and female albino rats

El‐Sokkary¹,

Alghriany²,

Atia³

2018

J Histol Histopathol

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“…Additionally, testosterone increases susceptibility to oxidative stress (44) and reduces immunocompetence (45). Sex differences in body size and antioxidant capacity (46,47) may be relevant but could not be evaluated in this investigation.…”

Section: Discussionmentioning

confidence: 99%

Shorter telomeres with high telomerase activity are associated with raised allostatic load and impoverished psychosocial resources

Zalli

Carvalho

Lin

et al. 2014

Proc. Natl. Acad. Sci. U.S.A.

162

118

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Recent work has linked psychological stress with premature cellular aging as indexed by reduced leukocyte telomere length. The combination of shorter telomeres with high telomerase activity (TA) may be indicative of active cell stress. We hypothesized that older individuals characterized by shorter telomeres with high TA in unstimulated leukocytes would show signs of high allostatic load and low levels of protective psychosocial resources. We studied 333 healthy men and women aged 54-76 y who underwent laboratory testing in which we measured cardiovascular, neuroendocrine, and inflammatory responses to standardized mental stress tasks. The tasks elicited prompt increases in blood pressure (BP), heart rate, cortisol, and mediators of inflammation and reductions in heart rate variability, returning toward baseline levels following stress. However, men having shorter telomeres with high TA showed blunted poststress recovery in systolic BP, heart rate variability, and monocyte chemoattractant protein-1, together with reduced responsivity in diastolic BP, heart rate, and cortisol, in comparison to men with longer telomeres or men with shorter telomeres and low TA. Shorter telomeres with high TA were also associated with reduced social support, lower optimism, higher hostility, and greater early life adversity. These effects were independent of age, socioeconomic status, and body mass index. We did not observe differences among older women. Our findings suggest that active cell stress is associated with impaired physiological stress responses and impoverished psychosocial resources, reflecting an integration of cellular, systemic, and psychological stress processes potentially relevant to health in older men. cellular senescence | allostasis | psychological distress T elomeres are nucleoprotein structures composed of tandem hexanucleotide repeats of the sequence TTAGGG that cap the ends of eukaryotic chromosomes, protecting them from end-to-end fusion and degradation during cell division. Human telomeric DNA naturally shortens with age during somatic cell divisions and as a result of oxidative attack (1, 2). At critical shortness, telomeres exhibit impaired function, leading to genomic instability, apoptosis, and cell senescence, often with altered transcriptional programming and mitochondrial dysfunction (1). Telomere attrition represents one of the hallmarks of aging (3). In humans, Mendelian singlegene mutations that directly compromise telomere maintenance cause premature mortality and onset of a spectrum of diseases overlapping with the age-related diseases common in the population (4). In addition, genome-wide association studies show that certain combinations of SNPs at genetic loci encoding known telomere-maintenance factors are associated with increased relative risks for pulmonary and coronary diseases (5). Shorter telomere length (TL) in white blood cells is linked and, in some cases, anticipates aging-related morbidity and mortality from conditions with immune system involvement, such as infectious disease...

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“…S1), although no differences were measured in brain or in reduced and oxidized GSH (Table S1). Female rats have better mitochondrial capacity showing less oxidative stress generation based in estrogen levels (Borras et al, 2003;Guevara et al, 2011). Sex hormones have neuroprotective effects, which have also been shown to increase mitochondrial efficiency (Nilsen and Brinton, 2004).…”

Section: Discussionmentioning

confidence: 99%

Resveratrol affects differently rat liver and brain mitochondrial bioenergetics and oxidative stress in vitro: Investigation of the role of gender

Moreira

Silva

Santos

et al. 2013

Food and Chemical Toxicology

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a b s t r a c tResveratrol (3,5,4 0 -trihydroxy-trans stilbene) is commonly recognized by its antioxidant properties. Despite its beneficial qualities, the toxic effects of this natural compound are still unknown. Since mitochondria are essential to support the energy-dependent regulation of several cell functions, the objective of this study was to evaluate resveratrol effects on rat brain and liver mitochondrial fractions from male and females regarding oxidative stress and bioenergetics. No basal differences were observed between mitochondrial fractions from males and females, except in liver mitochondria, the generation of H 2 O 2 by the respiratory chain is lower for female preparations. Resveratrol inhibited lipid peroxidation in preparations from both genders and organs. Furthermore, brain mitochondria in both gender groups appeared susceptible to resveratrol as seen by a decrease in state 3 respiration and alterations in mitochondrial membrane potential fluctuations during ADP phosphorylation. As opposed, liver mitochondria were less affected by resveratrol. Our data also demonstrates that resveratrol inhibits complex I activity in all mitochondrial preparations. The results suggest that brain mitochondria appear to be more susceptible to resveratrol effects, and gender appears to play a minor role. It remains to be determined if resveratrol effects on brain mitochondria contribute to deterioration of mitochondrial function or instead to mediate hormesis-mediated events.

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Mitochondria from females exhibit higher antioxidant gene expression and lower oxidative damage than males

Cited by 555 publications

References 35 publications

Protictive effects of green tea and garlic on the morphological and oxidative stress changes of hippocampus in aged male and female albino rats

Protictive effects of green tea and garlic on the morphological and oxidative stress changes of hippocampus in aged male and female albino rats

Shorter telomeres with high telomerase activity are associated with raised allostatic load and impoverished psychosocial resources

Resveratrol affects differently rat liver and brain mitochondrial bioenergetics and oxidative stress in vitro: Investigation of the role of gender

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