Read by QxMD icon Read


Selene Cansino, Frine Torres-Trejo, Cinthya Estrada-Manilla, Joyce Graciela Martínez-Galindo, Evelia Hernández-Ramos, Mariana Ayala-Hernández, Tania Gómez-Fernández, María Dolores Ramírez-González, Silvia Ruiz-Velasco
Working memory abilities significantly decrease with advancing age; hence, the search for factors that may increase or mitigate this decline is critical. Several factors have been identified that influence working memory; however, their effects have been mainly assessed separately and rarely together with other factors in the same sample. We examined 120 variables to search for factors that jointly act as mediators of working memory decay across the adult life span. A sample of 1652 healthy adults was assessed in spatial and verbal working memory domains...
July 2, 2018: GeroScience
Dain P LaRoche, Edward L Melanson, Morgan P Baumgartner, Breanna M Bozzuto, Victoria M Libby, Brittany N Marshall
Older adults do not get enough physical activity increasing risk for chronic disease and loss of physical function. The purpose of this study was to determine whether neuromuscular, metabolic, and cardiorespiratory indicators of walking effort explain daily activity in community-dwelling older adults. Sixteen women and fourteen men, 78 ± 8 years, performed a steady-state walk on a treadmill at 1.25 m s-1 while muscle activation, heart rate, lactate, respiratory exchange ratio, oxygen consumption (VO2 ), ventilation, and rating of perceived exertion (RPE) were recorded as markers of Walking Effort...
June 30, 2018: GeroScience
Per Wändell, Axel C Carlsson, Jan Sundquist, Kristina Sundquist
Risk of dementia is increased in patients with atrial fibrillation (AF). We aimed to study associations between relevant comorbidities and prevalent as well as incident dementia in AF patients. Study population included all adults (n = 12,283) ≥ 45 years diagnosed with AF at 75 primary care centers in Sweden 2001-2007. Logistic regression was used to calculate odds ratios (OR) with 95% confidence intervals (95% CI) for associations between comorbidities and prevalent dementia. In a subsample (n = 12,096), (excluding patients with dementia diagnosed before AF onset), Cox regression was used to estimate hazard ratios (HR) with 95% CIs for association between comorbidities, and incident dementia, after adjustment for age, socioeconomic factors and anticoagulant treatment...
June 22, 2018: GeroScience
Timothy Nacarelli, Ashley Azar, Oya Altinok, Zulfiya Orynbayeva, Christian Sell
Inhibition of mTOR signaling using rapamycin has been shown to increase lifespan and healthspan in multiple model organisms; however, the precise mechanisms for the beneficial effects of rapamycin remain uncertain. We have previously reported that rapamycin delays senescence in human cells and that enhanced mitochondrial biogenesis and protection from mitochondrial stress is one component of the benefit provided by rapamycin treatment. Here, using two models of senescence, replicative senescence and senescence induced by the presence of the Hutchinson-Gilford progeria lamin A mutation, we report that senescence is accompanied by elevated glycolysis and increased oxidative phosphorylation, which are both reduced by rapamycin...
June 21, 2018: GeroScience
Tamas Csipo, Gabor A Fulop, Agnes Lipecz, Stefano Tarantini, Tamas Kiss, Priya Balasubramanian, Anna Csiszar, Zoltan Ungvari, Andriy Yabluchanskiy
Obesity is one of the major risk factors for cardiovascular diseases and its prevalence is increasing in all age groups, with the biggest impact observed in middle-aged and older adults. A critical mechanism by which obesity promotes vascular pathologies in these patients involves impairment of endothelial function. While endothelial dysfunction in large vessels promotes atherogenesis, obesity-induced microvascular endothelial dysfunction impairs organ perfusion and thereby is causally related to the pathogenesis of ischemic heart disease, chronic kidney disease, intermittent claudication, exercise intolerance, and exacerbates cognitive decline in aging...
June 18, 2018: GeroScience
Primož Rožman
Aging is a complex multifactorial process, a prominent component being the senescence of the immune system. Consequently, immune-related diseases develop, including atherosclerosis, cancer, and life-threatening infections, which impact on health and longevity. Rejuvenating the aged immune system could mitigate these diseases, thereby contributing to longevity and health. Currently, an appealing option for rejuvenating the immune system is heterochronous autologous hematopoietic stem cell transplantation (haHSCT), where healthy autologous bone marrow/peripheral blood stem cells are collected during the youth of an individual, cryopreserved, and re-infused when he or she has reached an older age...
June 14, 2018: GeroScience
Thomas W Buford, Christy S Carter, William J VanDerPol, Dongquan Chen, Elliot J Lefkowitz, Peter Eipers, Casey D Morrow, Marcas M Bamman
Advanced age has been associated with alterations to the microbiome within the intestinal tract as well as intestinal permeability (i.e., "leaky gut"). Prior studies suggest that intestinal permeability may contribute to increases in systemic inflammation-an aging hallmark-possibly via microorganisms entering the circulation. Yet, no studies exist describing the state of the circulating microbiome among older persons. To compare microbiota profiles in serum between healthy young (20-35 years, n = 24) and older adults (60-75 years, n = 24) as well as associations between differential microbial populations and prominent indices of age-related inflammation...
June 5, 2018: GeroScience
Siva S V P Sakamuri, Jared A Sperling, Venkata N Sure, Monica H Dholakia, Nicholas R Peterson, Ibolya Rutkai, Padmini S Mahalingam, Ryosuke Satou, Prasad V G Katakam
Mitochondria play a critical role in the cardiomyocyte physiology by generating majority of the ATP required for the contraction/relaxation through oxidative phosphorylation (OXPHOS). Aging is a major risk factor for cardiovascular diseases (CVD) and mitochondrial dysfunction has been proposed as potential cause of aging. Recent technological innovations in Seahorse XFe24 Analyzer enhanced the detection sensitivity of oxygen consumption rate and proton flux to advance our ability study mitochondrial function...
June 2, 2018: GeroScience
Kaitlyn N Lewis, Nimrod D Rubinstein, Rochelle Buffenstein
The original version of this article unfortunately contained an error.
May 31, 2018: GeroScience
Nico A Contreras, Luigi Fontana, Valeria Tosti, Janko Nikolich-Žugich
Calorie restriction (CR) without malnutrition increases life span and health span in multiple model organisms. In non-human and human primates, CR causes changes that protect against several age-related pathologies, reduces inflammation, and preserves or improves cell-mediated immunity. However, CR has also been shown to exhibit adverse effects on certain organs and systems, including the immune system, and to impact genetically different organisms of the same species differentially. Alternately, short periods of fasting followed by refeeding may result in the proliferation of bone marrow stem cells, suggesting a potential rejuvenation effect that could impact the hematopoietic compartment...
May 26, 2018: GeroScience
Barbara W Carlson, Melissa A Craft, John R Carlson, Wajeeha Razaq, Kelley K Deardeuff, Doris M Benbrook
Advances in breast cancer treatment have markedly increased survivorship over the past three decades, with over 3.1 million survivors expected to live into their 70s and 80s. Without symptom relief interventions, nearly 35% of these survivors will have life-altering and distressing cognitive symptoms. This pilot study explored associations between serum markers of vascular aging, laterality in cerebral oxygenation, and severity of cognitive impairment in women, 12-18 months after chemotherapy for stage 2/3 invasive ductal breast cancer...
May 26, 2018: GeroScience
Adam B Salmon, Jonathan Dorigatti, Hillary F Huber, Cun Li, Peter W Nathanielsz
Compelling data exist for programming of chronic later-life diseases and longevity by perinatal developmental programming challenges. Understanding mechanisms by which life course health trajectory and longevity are set is fundamental to understanding aging. Appropriate approaches are needed to determine programming effects on cellular function. We have developed a baboon model in which control mothers eat ad libitum while a second group eat 70% of the global diet fed controls, leading to male and female offspring intrauterine growth restriction (IUGR)...
May 25, 2018: GeroScience
Ashley Gillon, Kathrine Nielsen, Charlotte Steel, Jon Cornwall, Philip Sheard
Life expectancy continues to extend, although frailty caused by loss of skeletal muscle mass continues unimpeded. Muscle atrophy caused by withdrawal of motor nerves is a feature of old age, as it is in amyotrophic lateral sclerosis (ALS) in which skeletal muscle denervation results from motoneuron death. In ALS, direct links have been established between motoneuron death and altered nucleocytoplasmic transport, so we ask whether similar defects accompany motoneuron death in normal ageing. We used immunohistochemistry on mouse tissues to explore potential links between neuromuscular junction (NMJ) degeneration, motoneuron death and nucleocytoplasmic transport regulatory proteins...
April 2018: GeroScience
Hak Joo Lee, Denis Feliers, Jeffrey L Barnes, Sae Oh, Goutam Ghosh Choudhury, Vivian Diaz, Veronica Galvan, Randy Strong, James Nelson, Adam Salmon, Christopher G Kevil, Balakuntalam S Kasinath
Aging is associated with replacement of normal kidney parenchyma by fibrosis. Because hydrogen sulfide (H2 S) ameliorates kidney fibrosis in disease models, we examined its status in the aging kidney. In the first study, we examined kidney cortical H2 S metabolism and signaling pathways related to synthesis of proteins including matrix proteins in young and old male C57BL/6 mice. In old mice, increase in renal cortical content of matrix protein involved in fibrosis was associated with decreased H2 S generation and AMPK activity, and activation of insulin receptor (IR)/IRS-2-Akt-mTORC1-mRNA translation signaling axis that can lead to increase in protein synthesis...
April 2018: GeroScience
Courtney Scerbak, Elena Vayndorf, Alicia Hernandez, Colin McGill, Barbara Taylor
Medicinal berries are appreciated for their health benefits, in traditional ecological knowledge and nutrition science. Determining the cellular mechanisms underlying the effects of berry supplementation may contribute to our understanding of aging. Here, we report that lowbush cranberry (Vaccinium vitis-idaea) treatment causes marked nuclear localization of the central aging-related transcription factor DAF-16/FOXO in aged Caenorhabditis elegans. Further, functional DAF-16 is required for the lifespan extension, improved mechanosensation, and posterior touch receptor neuron morphological changes induced by lowbush cranberry treatments...
April 2018: GeroScience
Sreemathi Logan, Daniel Owen, Sixia Chen, Wei-Jen Chen, Zoltan Ungvari, Julie Farley, Anna Csiszar, Amanda Sharpe, Maarten Loos, Bastijn Koopmans, Arlan Richardson, William E Sonntag
Cognitive function declines substantially with age in both humans and animal models. In humans, this decline is associated with decreases in independence and quality of life. Although the methodology for analysis of cognitive function in human models is relatively well established, similar analyses in animal models have many technical issues (e.g., unintended experimenter bias, motivational issues, stress, and testing during the light phase of the light dark cycle) that limit interpretation of the results. These caveats, and others, potentially bias the interpretation of studies in rodents and prevent the application of current tests of learning and memory as part of an overall healthspan assessment in rodent models of aging...
April 2018: GeroScience
Marjana Rahman Sarker, Susan F Franks
Processes such as aberrant redox signaling and chronic low-grade systemic inflammation have been reported to modulate age-associated pathologies such as cognitive impairment. Curcumin, the primary therapeutic component of the Indian spice, Turmeric (Curcuma longa), has long been known for its strong anti-inflammatory and antioxidant activity attributable to its unique molecular structure. Recently, an interest in this polyphenol as a cognitive therapeutic for the elderly has emerged. The purpose of this paper is to critically review preclinical and clinical studies that have evaluated the efficacy of curcumin in ameliorating and preventing age-associated cognitive decline and address the translational progress of preclinical to clinical efficacy...
April 2018: GeroScience
Kaitlyn N Lewis, Nimrod D Rubinstein, Rochelle Buffenstein
Mouse-sized naked mole-rats (Heterocephalus glaber), unlike other mammals, do not conform to Gompertzian laws of age-related mortality; adults show no age-related change in mortality risk. Moreover, we observe negligible hallmarks of aging with well-maintained physiological and molecular functions, commonly altered with age in other species. We questioned whether naked mole-rats, living an order of magnitude longer than laboratory mice, exhibit different plasma metabolite profiles, which could then highlight novel mechanisms or targets involved in disease and longevity...
April 2018: GeroScience
Ibiyonu Lawrence, Michael Bene, Timothy Nacarelli, Ashley Azar, Justin Z Cohen, Claudio Torres, Gregg Johannes, Christian Sell
Cellular senescence is a central component of the aging process. This cellular response has been found to be induced by multiple forms of molecular damage and senescent cells increase in number with age in all tissues examined to date. We have examined the correlation with age of two key proteins involved in the senescence program, p16INK4a and HMGB2. These proteins are involved in cell cycle arrest and chromatin remodeling during senescence. Circulating levels of these markers increases with age and correlates with functional status...
April 2018: GeroScience
Chia-Ter Chao, Jui Wang, Hon-Yen Wu, Jenq-Wen Huang, Kuo-Liong Chien
The incidence of acute kidney injury (AKI) rises with age and is associated with multiple risk factors. Here, we compared the risk factors for AKI between younger and older incident diabetic patients to examine the trends in risk alteration for individual factors across different age groups. Between 2007 and 2013, we selected all incident type 2 diabetic adults from the Taiwan National Health Insurance registry, stratified based on age: young (< 65 years), old (≥ 65 but < 75 years), and older-old (≥ 75 years)...
April 2018: GeroScience
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"