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Ageing Research Reviews

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https://www.readbyqxmd.com/read/28414155/recent-advances-in-cochlear-hair-cell-regeneration-a-promising-opportunity-for-the-treatment-of-age-related-hearing-loss
#1
REVIEW
Miren Revuelta, Francisco Santaolalla, Olatz Arteaga, Antonia Alvarez, Ana Sánchez-Del-Rey, Enrique Hilario
The objective of this paper is to review current information regarding the treatment of age-related hearing loss by using cochlear hair cell regeneration. Recent advances in the regeneration of the inner ear, including the usefulness of stem cells, are also presented. Based on the current literature, cochlear cell regeneration may well be possible in the short term and cochlear gene therapy may also be useful for the treatment of hearing loss associated with ageing. The present review provide further insight into the pathogenesis of Inner Ear senescence and aged-related hearing loss and facilitate the development of therapeutic strategies to repair hair cells damaged by ageing...
April 13, 2017: Ageing Research Reviews
https://www.readbyqxmd.com/read/28396185/from-lymphopoiesis-to-plasma-cells-differentiation-the-age-related-modifications-of-b-cell-compartment-are-influenced-by-inflamm-ageing
#2
REVIEW
Matteo Bulati, Calogero Caruso, Giuseppina Colonna-Romano
Ageing is a complex process characterized by a general decline in physiological functions with increasing morbidity and mortality. The most important aspect of ageing is the chronic inflammatory status, named "inflamm-ageing", strictly associated with the deterioration of the immune function, termed "immunosenescence". Both are causes of increased susceptibility of elderly to infectious diseases, cancer, dementia, cardiovascular diseases and autoimmunity, and of a decreased response to vaccination. It has been widely demonstrated that ageing has a strong impact on the remodelling of the B cell branch of immune system...
April 7, 2017: Ageing Research Reviews
https://www.readbyqxmd.com/read/28390891/aging-and-cancer-the-role-of-macrophages-and-neutrophils
#3
REVIEW
Connie Jackaman, Federica Tomay, Lelinh Duong, Norbaini Bintu Abdol Razak, Fiona J Pixley, Pat Metharom, Delia J Nelson
Impaired immune function has been implicated in the declining health and higher incidence of cancer in the elderly. However, age-related changes to immunity are not completely understood. Neutrophils and macrophages represent the first line of defence yet their ability to phagocytose pathogens decrease with aging. Cytotoxic T lymphocytes are critical in eliminating tumors, but T cell function is also compromised with aging. T cell responses can be regulated by macrophages and may depend on the functional phenotype macrophages adopt in response to microenvironmental signals...
April 6, 2017: Ageing Research Reviews
https://www.readbyqxmd.com/read/28366616/relationship-between-depression-and-frailty-in-older-adults-a-systematic-review-and-meta-analysis
#4
REVIEW
Pinar Soysal, Nicola Veronese, Trevor Thompson, Kai G Kahl, Brisa S Fernandes, A Matthew Prina, Marco Solmi, Patricia Schofield, Ai Koyanagi, Ping-Tao Tseng, Pao-Yao Lin, Che-Sheng Chu, Theodore D Cosco, Matteo Cesari, Andre F Carvalho, Brendon Stubbs
AIM: Depression and frailty are prevalent and burdensome in older age. However, the relationships between these entities are unclear and no quantitative meta- analysis exists. We conducted a systematic review and meta-analysis to investigate the associations between depression and frailty. METHODS: Two authors searched major electronic databases from inception until November-2016 for cross-sectional/longitudinal studies investigating depression and frailty. The strength of the reciprocal associations between frailty and depression was assessed through odds ratios (ORs) adjusted for potential confounders...
March 31, 2017: Ageing Research Reviews
https://www.readbyqxmd.com/read/28351686/dna-damage-response-and-autophagy-in-the-degeneration-of-retinal-pigment-epithelial-cells-implications-for-age-related-macular-degeneration-amd
#5
REVIEW
Juha M T Hyttinen, Janusz Błasiak, Minna Niittykoski, Kati Kinnunen, Anu Kauppinen, Antero Salminen, Kai Kaarniranta
In this review we will discuss the links between autophagy, a mechanism involved in the maintenance of cellular homeostasis and controlling cellular waste management, and the DNA damage response (DDR), comprising various mechanisms preserving the integrity and stability of the genome. A reduced autophagy capacity in retinal pigment epithelium has been shown to be connected in the pathogenesis of age-related macular degeneration (AMD), an eye disease. This degenerative disease is a major and increasing cause of vision loss in the elderly in developed countries, primarily due to the profound accumulation of intra- and extracellular waste: lipofuscin and drusen...
March 27, 2017: Ageing Research Reviews
https://www.readbyqxmd.com/read/28342882/functional-neuroimaging-findings-in-healthy-middle-aged-adults-at-risk-of-alzheimer-s-disease
#6
REVIEW
Mirette Habib, Elijah Mak, Silvy Gabel, Li Su, Guy Williams, Adam Waldman, Katie Wells, Karen Ritchie, Craig Ritchie, John T O'Brien
It is well established that the neurodegenerative process of Alzheimer's disease (AD) begins many years before symptom onset. This preclinical phase provides a crucial time-window for therapeutic intervention, though this requires biomarkers that could evaluate the efficacy of future disease-modification treatments in asymptomatic individuals. The last decade has witnessed a proliferation of studies characterizing the temporal sequence of the earliest functional and structural brain imaging changes in AD. These efforts have focused on studying individuals who are highly vulnerable to develop AD, such as those with familial genetic mutations, susceptibility genes (i...
March 22, 2017: Ageing Research Reviews
https://www.readbyqxmd.com/read/28323064/the-relevance-of-%C3%AE-klotho-to-the-central-nervous-system-some-key-questions
#7
REVIEW
Marina Minto Lopes-Cararo, Caio Henrique Yokoyama Mazucanti, Cristoforo Scavone, Elisa Mitiko Kawamoto, Daniel Charles Berwick
α-Klotho is well described as an anti-aging protein, with critical roles in kidney function as a transmembrane co-receptor for FGF23, and as a soluble factor in serum. α-Klotho is also expressed in the choroid plexus, where it is released into the cerebrospinal fluid. Nonetheless, α-Klotho is also expressed in the brain parenchyma. Accumulating evidence indicates that this pool of α-Klotho, which we define as brain α-Klotho, may play important roles as a neuroprotective factor and in promoting myelination, thereby supporting healthy brain aging...
March 18, 2017: Ageing Research Reviews
https://www.readbyqxmd.com/read/28315409/in-vivo-tau-pet-imaging-in-dementia-pathophysiology-radiotracer-quantification-and-a-systematic-review-of-clinical-findings
#8
REVIEW
Benjamin Hall, Elijah Mak, Simon Cervenka, Franklin I Aigbirhio, James B Rowe, John T O'Brien
In addition to the deposition of β-amyloid plaques, neurofibrillary tangles composed of aggregated hyperphosphorylated tau are one of the pathological hallmarks of Alzheimer's disease and other neurodegenerative disorders. Until now, our understanding about the natural history and topography of tau deposition has only been based on post-mortem and cerebrospinal fluid studies, and evidence continues to implicate tau as a central driver of downstream neurodegenerative processes and cognitive decline. Recently, it has become possible to assess the regional distribution and severity of tau burden in vivo with the development of novel radiotracers for positron emission tomography (PET) imaging...
March 15, 2017: Ageing Research Reviews
https://www.readbyqxmd.com/read/28284872/cognitive-functioning-of-individuals-aged-90-years-and-older-without-dementia-a-systematic-review
#9
REVIEW
N Legdeur, T T Binnekade, R H Otten, M Badissi, P Scheltens, P J Visser, A B Maier
INTRODUCTION: Reference values to define cognitive impairment in individuals aged 90 years and older are lacking. We systematically reviewed the literature to determine the level of cognitive functioning of individuals aged 90 years and older without dementia. METHODS: The search identified 3972 articles of which 20 articles were included in the review. We calculated mean cognitive test scores and cut-off scores for cognitive tests published in two or more articles...
March 8, 2017: Ageing Research Reviews
https://www.readbyqxmd.com/read/28274839/dietary-protein-aging-and-nutritional-geometry
#10
REVIEW
Stephen J Simpson, David G Le Couteur, David Raubenheimer, Samantha M Solon-Biet, Gregory J Cooney, Victoria C Cogger, Luigi Fontana
Nearly a century of research has shown that nutritional interventions can delay aging and age- related diseases in many animal models and possibly humans. The most robust and widely studied intervention is caloric restriction, while protein restriction and restriction of various amino acids (methionine, tryptophan) have also been shown to delay aging. However, there is still debate over whether the major impact on aging is secondary to caloric intake, protein intake or specific amino acids. Nutritional geometry provides new perspectives on the relationship between nutrition and aging by focusing on calories, macronutrients and their interactions across a landscape of diets, and taking into account compensatory feeding in ad libitum-fed experiments...
March 6, 2017: Ageing Research Reviews
https://www.readbyqxmd.com/read/28238941/theoretical-and-practical-aspects-of-using-fetal-fibroblasts-for-skin-regeneration
#11
REVIEW
Meirong Li, Yali Zhao, Haojie Hao, Weidong Han, Xiaobing Fu
Cutaneous wounding in late-gestational fetal or postnatal humans results in scar formation without any skin appendages. Early or mid- gestational skin healing in humans is characterized by the absence of scaring in a process resembling regeneration. Tremendous cellular and molecular mechanisms contribute to this distinction, and fibroblasts play critical roles in scar or scarless wound healing. This review discussed the different repair mechanisms involved in wound healing of fibroblasts at different developmental stages and further confirmed that fetal fibroblast transplantation resulted in reduced scar healing in vivo...
February 24, 2017: Ageing Research Reviews
https://www.readbyqxmd.com/read/28235660/targeting-the-tlr4-signaling-pathway-by-polyphenols-a-novel-therapeutic-strategy-for-neuroinflammation
#12
REVIEW
Mahban Rahimifard, Faheem Maqbool, Shermineh Moeini-Nodeh, Kamal Niaz, Mohammad Abdollahi, Nady Braidy, Seyed Mohammad Nabavi, Seyed Fazel Nabavi
A wide array of cell signaling mediators and their interactions play vital roles in neuroinflammation associated with ischemia, brain trauma, developmental disorders and age-related neurodegeneration. Along with neurons, microglia and astrocytes are also affected by the inflammatory cascade by releasing pro-inflammatory cytokines, chemokines and reactive oxygen species. The release of pro-inflammatory mediators in response to neural dysfunction may be helpful, neutral or even deleterious to normal cellular survival...
February 21, 2017: Ageing Research Reviews
https://www.readbyqxmd.com/read/28235659/suspected-non-alzheimer-s-pathology-is-it-non-alzheimer-s-or-non-amyloid
#13
REVIEW
Melanie Dani, David J Brooks, Paul Edison
Neurodegeneration, the progressive loss of neurons, is a major process involved in dementia and age-related cognitive impairment. It can be detected clinically using currently available biomarker tests. Suspected Non Alzheimer Pathology (SNAP) is a biomarker-based concept that encompasses a group of individuals with neurodegeneration, but no evidence of amyloid deposition (thereby distinguishing it from Alzheimer's disease (AD)). These individuals may often have a clinical diagnosis of AD, but their clinical features, genetic susceptibility and progression can differ significantly, carrying crucial implications for precise diagnostics, clinical management, and efficacy of clinical drug trials...
February 21, 2017: Ageing Research Reviews
https://www.readbyqxmd.com/read/28223244/frailty-and-sarcopenia-the-potential-role-of-an-aged-immune-system
#14
REVIEW
Daisy Wilson, Thomas Jackson, Elizabeth Sapey, Janet M Lord
Frailty is a common negative consequence of ageing. Sarcopenia, the syndrome of loss of muscle mass, quality and strength, is more common in older adults and has been considered a precursor syndrome or the physical manifestation of frailty. The pathophysiology of both syndromes is incompletely described with multiple causes, inter-relationships and complex pathways proposed. Age-associated changes to the immune system (both immunesenescence, the decline in immune function with ageing, and inflammageing, a state of chronic inflammation) have been suggested as contributors to sarcopenia and frailty but a direct causative role remains to be established...
February 20, 2017: Ageing Research Reviews
https://www.readbyqxmd.com/read/28219777/nutrition-metabolism-and-targeting-aging-in-nonhuman-primates
#15
REVIEW
Priya Balasubramanian, Julie A Mattison, Rozalyn M Anderson
This short review focuses on the importance of nonhuman primate nutrition and aging studies and makes the case that a targeted expansion of the use of this highly translatable model would be advantageous to the biology of aging field. First, we describe the high degree of similarity of the model in terms of aging phenotypes including incidence and prevalence of common human age-related diseases. Second, we discuss the importance of the nonhuman primate nutrition and aging studies and the extent to which the outcomes of two ongoing long-term studies of caloric restriction are congruent with short-term equivalent studies in humans...
February 20, 2017: Ageing Research Reviews
https://www.readbyqxmd.com/read/28216454/protective-effects-of-short-term-dietary-restriction-in-surgical-stress-and-chemotherapy
#16
REVIEW
Sebastian Brandhorst, Eylul Harputlugil, James R Mitchell, Valter D Longo
Reduced caloric intake including fasting, as well as the dietary composition or the timing of food intake, impact longevity, likely through a modification in the onset or the severity of chronic aging-related diseases such as cancer. As with pre- and post-operative dietary recommendations, evidence-based nutritional advice from healthcare professionals during and after cancer treatment is often vague or conflicting. We hypothesize that preventive dietary recommendations can help in the context of both chronic cancer treatment efficacy and the avoidance of development of secondary malignancies, as well as in the context of protection from the acute stress of surgery...
February 20, 2017: Ageing Research Reviews
https://www.readbyqxmd.com/read/28189666/handgrip-strength-as-a-means-of-monitoring-progression-of-cognitive-decline-a-scoping-review
#17
REVIEW
Nora E Fritz, Caitlin J McCarthy, Diane E Adamo
Cognitive decline in older adults contributes to reduced ability to perform daily tasks and continued disuse leads to muscle weakness and potentiates functional loss. Despite explicit links between the motor and cognitive systems, few health care providers assess motor function when addressing the needs of individuals with cognitive loss. Early and easy measurable biomarkers of cognitive decline have the potential to improve care for individuals with dementia and mild cognitive impairment. The aim of this study was to conduct a systematic search to determine the relationship among handgrip strength, as a measure of global muscle strength, and cognitive decline over time...
February 8, 2017: Ageing Research Reviews
https://www.readbyqxmd.com/read/28179128/pain-perception-in-parkinson-s-disease-a-systematic-review-and-meta-analysis-of-experimental-studies
#18
REVIEW
Trevor Thompson, Katy Gallop, Christoph U Correll, Andre F Carvalho, Nicola Veronese, Ellen Wright, Brendon Stubbs
While hyperalgesia (increased pain sensitivity) has been suggested to contribute to the increased prevalence of clinical pain in Parkinson's disease (PD), experimental research is equivocal and mechanisms are poorly understood. We conducted a meta-analysis of studies comparing PD patients to healthy controls (HCs) in their response to experimental pain stimuli. Articles were acquired through systematic searches of major databases from inception until 10/2016. Twenty-six studies met inclusion criteria, comprising 1292 participants (PD=739, HCs=553)...
February 4, 2017: Ageing Research Reviews
https://www.readbyqxmd.com/read/28143778/risk-of-cardiovascular-disease-morbidity-and-mortality-in-frail-and-pre-frail-older-adults-results-from-a-meta-analysis-and-exploratory-meta-regression-analysis
#19
REVIEW
Nicola Veronese, Emanuele Cereda, Brendon Stubbs, Marco Solmi, Claudio Luchini, Enzo Manzato, Giuseppe Sergi, Peter Manu, Tamara Harris, Luigi Fontana, Timo Strandberg, Helene Amieva, Julien Dumurgier, Alexis Elbaz, Christophe Tzourio, Monika Eicholzer, Sabine Rohrmann, Claudio Moretti, Fabrizio D'Ascenzo, Giorgio Quadri, Alessandro Polidoro, Roberto Alves Lourenço, Virgilio Garcia Moreira, Juan Sanchis, Valeria Scotti, Stefania Maggi, Christoph U Correll
Frailty is common and associated with poorer outcomes in the elderly, but its role as potential cardiovascular disease (CVD) risk factor requires clarification. We thus aimed to meta-analytically evaluate the evidence of frailty and pre-frailty as risk factors for CVD. Two reviewers selected all studies comparing data about CVD prevalence or incidence rates between frail/pre-frail vs. robust. The association between frailty status and CVD in cross-sectional studies was explored by calculating and pooling crude and adjusted odds ratios (ORs) ±95% confidence intervals (CIs); the data from longitudinal studies were pooled using the adjusted hazard ratios (HRs)...
May 2017: Ageing Research Reviews
https://www.readbyqxmd.com/read/28089523/corrigendum-to-inflammation-and-frailty-in-the-elderly-a-systematic-review-and-meta-analysis-ageing-res-rev-31-2016-1-8
#20
Pinar Soysal, Brendon Stubbs, Paola Lucato, Claudio Luchini, Marco Solmi, Roberto Peluso, Giuseppe Sergi, Ahmet Turan Isik, Enzo Manzato, Stefania Maggi, Marcello Maggio, A Matthew Prina, Theodore D Cosco, Yu-Tzu Wu, Nicola Veronese
No abstract text is available yet for this article.
May 2017: Ageing Research Reviews
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