Artigos Científicos 680 results

Nutrição e Envelhecimento – Artigo 20

Vitamin D deficiency in older adults and its associated factors: a cross-sectional analysis of the Mexican Health and Aging Study Abstract Summary—Vitamin D deficiency was common in older adults from a country with adequate sun exposure. The variables associated with this deficiency provide insight into the next steps needed to characterize older adults with this deficiency and to treat it accordingly. Purpose—The aim of this study was to describe the prevalence of and factors ...

Nutrição e Envelhecimento – Artigo 19

Vitamin C, Aging and Alzheimer’s Disease Abstract: Accumulating evidence in mice models of accelerated senescence indicates a rescuing role of ascorbic acid in premature aging. Supplementation of ascorbic acid appeared to halt cell growth, oxidative stress, telomere attrition, disorganization of chromatin, and excessive secretion of inflammatory factors, and extend lifespan. Interestingly, ascorbic acid (AA) was also found to positively modulate inflamm-aging and immunosenescence, two ...

Nutrição e Envelhecimento – Artigo 18

Vitamin B12 deficiency and impaired expression of amnionless during aging Abstract Background: Physical frailty and loss of mobility in elderly individuals lead to reduced independence, quality of life, and increased mortality. Vitamin B12 deficiency has been linked to several age-related chronic diseases, including in the musculo-skeletal system, where vitamin B12 deficiency is generally believed to be linked to poor nutritional intake. In the present study, we asked whether aging and ...

Nutrição e Envelhecimento – Artigo 17

TOR-mediated regulation of metabolism in aging Summary Cellular metabolism is regulated by the mTOR kinase, a key component of the molecular nutrient sensor pathway that plays a central role in cellular survival and aging. The mTOR pathway promotes protein and lipid synthesis and inhibits autophagy, a process known for its contribution to longevity in several model organisms. The nutrient-sensing pathway is regulated at the lysosomal membrane by a number of proteins for which defic...

Nutrição e Envelhecimento – Artigo 16

The influence of vitamins E and C and exercise on brain aging Abstract Age-related declines in motor and cognitive function have been associated with increases in oxidative stress. Accordingly, interventions capable of reducing the oxidative burden would be capable of preventing or reducing functional declines occurring during aging. Popular interventions such as antioxidant intake and moderate exercise are often recommended to attain healthy aging and have the capacity to alter redox ...

Nutrição e Envelhecimento – Artigo 15

Serum Tocopherol Levels and Vitamin E Intake are Associated with Lung Function in the Normative Aging Study Abstract Background and Aims—The results of studies assessing relationships between vitamin E intake and status and lung function are conflicting. This study aimed to evaluate the effect of vitamin E intake and serum levels of tocopherol isoforms on lung function in a cross-sectional sample of 580 men from the Normative Aging Study, a longitudinal aging study. Methods—Re...

Nutrição e Envelhecimento – Artigo 14

Regulation of metabolic health and aging by nutrient-sensitive signaling pathways Abstract All organisms need to be capable of adapting to changes in the availability and composition of nutrients. Over 75 years ago, researchers discovered that a calorie restricted (CR) diet could significantly extend the lifespan of rats, and since then a CR diet has been shown to increase lifespan and healthspan in model organisms ranging from yeast to non-human primates. In this review, we discuss ...

Nutrição e Envelhecimento – Artigo 13

Proteostasis, oxidative stress and aging ABSTRACT The production of reactive species is an inevitable by-product of metabolism and thus, life itself. Since reactive species are able to damage cellular structures, especially proteins, as the most abundant macromolecule of mammalian cells, systems are necessary which regulate and preserve a functional cellular protein pool, in a process termed “proteostasis”. Not only the mammalian protein pool is subject of a constant turnover, ...

Nutrição e Envelhecimento – Artigo 12

Nutritional Considerations for Healthy Aging and Reduction in Age-Related Chronic Disease  ABSTRACT A projected doubling in the global population of people aged $60 y by the year 2050 has major health and economic implications, especially in developing regions. Burdens of unhealthy aging associated with chronic noncommunicable and other age-related diseases may be largely preventable with lifestyle modification, including diet. However, as adults age they become at risk of “nutritio...

Nutrição e Envelhecimento – Artigo 11

Nutrition and other Lifestyle Influences on Arterial Aging Abstract As our world’s population ages, cardiovascular diseases (CVD) will become an increasingly urgent public health problem. A key antecedent to clinical CVD and many other chronic disorders of aging is age-related arterial dysfunction, characterized by increased arterial stiffness and impaired arterial endothelial function. Accumulating evidence demonstrates that diet and nutrition may favorably modulate these arterial ...