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Mechanisms of Ageing and Development

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https://www.readbyqxmd.com/read/28705548/age-dependent-ventricular-arrhythmias-risk-structural-and-molecular-remodeling-in-systemic-arterial-hypertension
#1
Alina Scridon, Rosa Doñate Puertas, Waheed Manati, Emmanuelle Fouilloux-Meugnier, Emmanuelle Loizon, Valérie Oréa, Bruno Chapuis, Claude Julien, Christian Barrès, Alain Tabib, Philippe Chevalier
INTRODUCTION: The left ventricular hypertrophy (LVH)-ventricular arrhythmias relationship associated with arterial hypertension and aging remains controversial. We aimed to assess the age-dependency of ventricular arrhythmias in spontaneously hypertensive rats (SHRs) and the corresponding ventricular structural and molecular remodeling. MATERIALS AND METHODS: Ventricular arrhythmias were quantified using 24-h radiotelemetry ECG monitoring in eight SHRs and four Wistar-Kyoto (WKY) rats at 14 (young), 24 (adult), and 48 (aging) weeks of age...
July 10, 2017: Mechanisms of Ageing and Development
https://www.readbyqxmd.com/read/28688962/stress-cell-senescence-and-organismal-ageing
#2
REVIEW
João Pedro de Magalhães, João F Passos
Cellular senescence was first described by Hayflick and Moorhead in the 1960s as the irreversible arrest of cells following prolonged cultivation. Telomere shortening is the key mechanism driving replicative senescence in human fibroblasts. Later, pioneering work by Olivier Toussaint and others showed that stress plays a major role in the induction of senescence in vitro, a phenomenon known as stress-induced premature senescence or SIPS. It is also now widely accepted that senescence plays a role in vivo. An emerging body of evidence from animal models, and particularly mice, has demonstrated an important role for senescence in several processes such as embryonic development, wound healing, tumour suppression and ageing...
July 5, 2017: Mechanisms of Ageing and Development
https://www.readbyqxmd.com/read/28684270/in-memoriam-olivier-toussaint-stress-induced-premature-senescence-and-the-role-of-dna-damage
#3
Alexander Bürkle
In the present paper, a concise review on the major contribution of our recently deceased colleague, Dr Olivier Toussaint, to the topic of stress-induced premature senescence (SIPS) of cells is presented together with a hypothesis on a mechanistic role of DNA damage, based on accumulating evidence for an important role of DNA damage as a driving factor in ageing.
July 3, 2017: Mechanisms of Ageing and Development
https://www.readbyqxmd.com/read/28684269/a-novel-role-of-the-mitochondrial-permeability-transition-pore-in-gossypol-induced-mitochondrial-dysfunction
#4
Verena Warnsmann, Nina Meyer, Andrea Hamann, Donat Kögel, Heinz D Osiewacz
Gossypol, a natural polyphenolic compound from cotton seeds, is known to trigger different forms of cell death in various types of cancer. Gossypol acts as a Bcl-2 inhibitor that induces apoptosis in apoptosis-competent cells. In apoptosis-resistant cancers such as glioblastoma, it triggers a non-apoptotic type of cell death associated with increased oxidative stress, mitochondrial depolarisation and fragmentation. In order to investigate the impact of gossypol on mitochondrial function, the mitochondrial permeability transition pore and on oxidative stress in more detail, we used the aging model Podospora anserina that lacks endogenous Bcl-2 proteins...
July 3, 2017: Mechanisms of Ageing and Development
https://www.readbyqxmd.com/read/28651996/centenarians-as-a-21st-century-healthy-aging-model-a-legacy-of-humanity-and-the-need-for-a-world-wide-consortium-wwcc100
#5
EDITORIAL
Claudio Franceschi, Giuseppe Passarino, Daniela Mari, Daniela Monti
No abstract text is available yet for this article.
June 23, 2017: Mechanisms of Ageing and Development
https://www.readbyqxmd.com/read/28636901/the-effect-of-cd34-cell-telomere-length-and-htert-expression-on-the-outcome-of-autologous-cd34-cell-transplantation-in-patients-with-chronic-heart-failure
#6
Jasmina-Ziva Rozman, Maja Pohar Perme, Mojca Jez, Elvira Malicev, Metka Krasna, Srdjan Novakovic, Bojan Vrtovec, Primoz Rozman
Age-related telomere attrition in stem/progenitor cells may diminish their functional capacity and thereby impair the outcome of cell-based therapies. The aim of the present study was to investigate the effect of CD34(+) cell telomere length and hTERT expression on the clinical outcome of autologous CD34(+) cell transplantation. We studied 43 patients with cardiomyopathy. Their peripheral blood CD34(+) cells were mobilized with granulocyte colony-stimulating factor, enriched by immunoselection and delivered transendocardially...
June 18, 2017: Mechanisms of Ageing and Development
https://www.readbyqxmd.com/read/28502821/sasp-regulation-by-noncoding-rna
#7
REVIEW
Amaresh C Panda, Kotb Abdelmohsen, Myriam Gorospe
Noncoding RNAs (ncRNAs), including micro (mi)RNAs, long noncoding (lnc)RNAs, and circular (circ)RNAs, control specific gene expression programs by regulating transcriptional, post-transcriptional, and post-translational processes. Through their broad influence on protein expression and function, ncRNAs have been implicated in virtually all cellular processes such as proliferation, senescence, quiescence, differentiation, apoptosis, and the stress and immune responses. Senescence is a cellular phenotype associated with the physiologic decline of aging and with age-related pathologies...
May 11, 2017: Mechanisms of Ageing and Development
https://www.readbyqxmd.com/read/28502819/functional-relevance-of-mirnas-in-premature-ageing
#8
REVIEW
Xurde M Caravia, David Roiz-Valle, Alba Morán-Álvarez, Carlos López-Otín
Ageing is a complex biological process characterized by the progressive loss of biological fitness due to the accumulation of macromolecular and cellular damage that affects most living organisms. Moreover, ageing is an important risk factor for many pathologies, including cardiovascular diseases, neurological disorders, and cancer. However, the ageing rate can be modulated by genetic, nutritional, and pharmacological factors, highlighting the concept of "ageing plasticity". Progeroid syndromes are a group of rare genetic diseases that resemble many characteristics of physiological ageing...
May 11, 2017: Mechanisms of Ageing and Development
https://www.readbyqxmd.com/read/28487181/environmental-conditions-can-modulate-the-links-among-oxidative-stress-age-and-longevity
#9
Valeria Marasco, Antoine Stier, Winnie Boner, Kate Griffiths, Britt Heidinger, Pat Monaghan
Understanding the links between environmental conditions and longevity remains a major focus in biological research. We examined within-individual changes between early- and mid-adulthood in the circulating levels of four oxidative stress markers linked to ageing, using zebra finches (Taeniopygia guttata): a DNA damage product (8-hydroxy-2'-deoxyguanosine; 8-OHdG), protein carbonyls (PC), non-enzymatic antioxidant capacity (OXY), and superoxide dismutase activity (SOD). We further examined whether such within-individual changes differed among birds living under control (ad lib food) or more challenging environmental conditions (unpredictable food availability), having previously found that the latter increased corticosterone levels when food was absent but improved survival over a three year period...
May 6, 2017: Mechanisms of Ageing and Development
https://www.readbyqxmd.com/read/28477984/mechanisms-of-endothelial-dysfunction-during-aging-predisposition-to-thrombosis
#10
REVIEW
Cesar Sepúlveda, Iván Palomo, Eduardo Fuentes
One of the risk factors for developing cardiovascular disease (CVD) is aging. In the elderly endothelial dysfunction occurs as altered endothelial ability to regulate hemostasis, vascular tone and cell permeability. In addition, there are changes in the expression and plasma levels of important endothelial components related to endothelial-mediated modulation in hemostasis. These include alterations in the metabolism of nitric oxide and prostanoides, endothelin-1, thrombomodulin and Von Willebrand factor. These alterations potentiate the pro-coagulant status developed with aging, highlighting the endothelial role in the development of thrombosis in aging...
May 3, 2017: Mechanisms of Ageing and Development
https://www.readbyqxmd.com/read/28476532/skin-melanocytes-and-fibroblasts-show-different-changes-in-choline-metabolism-during-cellular-senescence
#11
Cordula Windler, Claudia Gey, Karsten Seeger
Unmodified cells undergo only a limited number of cell divisions until they enter a state termed cellular senescence. Other triggers like cytotoxic compounds can also induce cell senescence. Since cell senescence represents a major mechanism of tumor suppression this cellular state has attracted increasing attention. Different markers like senescence-associated β-galactosidase (SAβGal), senescence-associated heterochromatic foci (SAHF) or certain metabolic changes have been identified to be characteristic for senescent cells; however, data is often limited to fibroblasts - the cardinal model system for cellular senescence...
May 2, 2017: Mechanisms of Ageing and Development
https://www.readbyqxmd.com/read/28472635/the-growth-differentiation-factor-11-gdf11-and-myostatin-mstn-in-tissue-specific-aging
#12
REVIEW
Xiaolan Fan, Uma Gaur, Lin Sun, Deying Yang, Mingyao Yang
Growth differentiation factor 11 (GDF11) and myostatin (MSTN) are evolutionarily conserved homologues proteins which are closely related members of the transforming growth factor β superfamily. They are often perceived to serve similar or overlapping roles. Recently, GDF11 has been identified as playing a role during aging, however there are conflicting reports as to the nature of this role. In this review, we will discuss the literature regarding functions of GDF11 and myostatin in the heart, brain, and skeletal muscle during aging...
May 1, 2017: Mechanisms of Ageing and Development
https://www.readbyqxmd.com/read/28472634/learning-of-nature-the-curious-case-of-the-naked-mole-rat
#13
REVIEW
Francisco Alejandro Lagunas-Rangel, Venice Chávez-Valencia
Naked mole rats (NMRs) are the longest-living rodents known, living up to approximately 30 years and showing sustained good health. Nowadays, NMRs are considered excellent models for aging and, additionally, for cancer research, due to the evidence of a remarkable cancer resistance demonstrated through thousands of necropsies performed with very few cases that describe this pathology, which is believed to be a disease that unavoidably accompanies aging. Since some years ago, several studies have tried to explain the possible mechanisms underlying longevity and cancer resistance in NMRs through different perspectives and directions, creating new knowledge that subsequently could be used for cancer prevention and delaying aging in humans...
May 1, 2017: Mechanisms of Ageing and Development
https://www.readbyqxmd.com/read/28461103/demographic-genetic-and-phenotypic-characteristics-of-centenarians-in-italy-focus-on-gender-differences
#14
REVIEW
Alberto Montesanto, Francesco De Rango, Chiara Pirazzini, Giulia Guidarelli, Filippo Domma, Claudio Franceschi, Giuseppe Passarino
An impressive and coherent series of epidemiological data from different populations (New England Americans, Mormons, Ashkenazi Jewish, Icelandic, Okinawan Japanese, Italians) suggests that long-lived subjects able to reach the extreme limits of human life, such as centenarians and supercentenarians, represent an extraordinary and informative model to identify the mechanisms responsible for healthy aging and human longevity. In most studies, genetic, demographic and phenotypic characteristics of longevity are discussed separately...
April 28, 2017: Mechanisms of Ageing and Development
https://www.readbyqxmd.com/read/28502820/cancer-incidence-prevalence-and-mortality-in-the-oldest-old-a-comprehensive-review
#15
REVIEW
Shantell C Nolen, Marcella A Evans, Avital Fischer, Maria M Corrada, Claudia H Kawas, Daniela A Bota
Chronic health conditions are commonplace in older populations. The process of aging impacts many of the world's top health concerns. With the average life expectancy continuing to climb, understanding patterns of morbidity in aging populations has become progressively more important. Cancer is an age-related disease, whose risk has been proven to increase with age. Limited information is published about the epidemiology of cancer and the cancer contribution to mortality in the 85+ age group, often referred to as the oldest-old...
June 2017: Mechanisms of Ageing and Development
https://www.readbyqxmd.com/read/28445698/editorial-dna-damage-immunity
#16
EDITORIAL
George A Garinis, Bjoern Schwer, Björn Schumacher
No abstract text is available yet for this article.
April 23, 2017: Mechanisms of Ageing and Development
https://www.readbyqxmd.com/read/28438470/how-inflammation-underlies-physical-and-organ-function-in-acutely-admitted-older-medical-patients
#17
Henrik Hedegaard Klausen, Ann Christine Bodilsen, Janne Petersen, Thomas Bandholm, Thomas Haupt, Ditte Maria Sivertsen, Ove Andersen
OBJECTIVES: To investigate whether systemic inflammation in acutely admitted older medical patients (age >65 years) is associated with physical performance and organ dysfunction. Organ dysfunction´s association with physical performance, and whether these associations are mediated by systemic inflammation, was also investigated. METHODS: A cross-sectional study in an Emergency Department. Physical performance was assessed by handgrip strength and de Morton Mobility Index (DEMMI), and organ dysfunction by FI-OutRef, the number of standard blood tests outside the reference range...
April 22, 2017: Mechanisms of Ageing and Development
https://www.readbyqxmd.com/read/28431907/telomere-shortening-during-aging-attenuation-by-antioxidants-and-anti-inflammatory-agents
#18
REVIEW
Kedar N Prasad, Meixia Wu, Stephen C Bondy
Telomeres are a repeated sequence -of bases found at the ends of chromosomes. In humans, this sequence is TTAGGG, which is repeated over 2000 times. Telomeres protect the ends chromosomes from fusion with nearby chromosomes, and allow effective replication of DNA. Each time a cell divides, 25-200 base pairs are lost from the terminal sequence of chromosomes. By becoming truncated during cell division, telomeres protect essential genes from being shortened and thus inactivated. In addition, telomeres are sensitive to inflammation and oxidative stress, which can further promote telomere shortening...
April 18, 2017: Mechanisms of Ageing and Development
https://www.readbyqxmd.com/read/28414025/alterations-of-the-translation-apparatus-during-aging-and-stress-response
#19
REVIEW
Yulia Gonskikh, Norbert Polacek
Aging is a biological process characterized by the irreversible and time-dependent deterioration of cell functions, tissues, and organs. Accumulating studies in a wide range of species from yeast to human revealed changes associated with the aging process to be conserved throughout evolution. The main characteristics of aging are (i) genomic instability, (ii) loss of telomere function, (iii) epigenetic changes,(iv) increased cellular senescence, (v) depletion of the stem cell pool, (vi) altered intercellular communication and (vii) loss of protein homeostasis...
April 13, 2017: Mechanisms of Ageing and Development
https://www.readbyqxmd.com/read/28408140/differential-menopause-versus-aging-induced-changes-in-oxidative-stress-and-circadian-rhythm-gene-markers
#20
Oriol A Rangel-Zuñiga, Cristina Cruz-Teno, Carmen Haro, Gracia M Quintana-Navarro, Fernando Camara-Martos, Pablo Perez-Martinez, Antonio Garcia-Rios, Marta Garaulet, Manuel Tena-Sempere, Jose Lopez-Miranda, Francisco Perez-Jimenez, Antonio Camargo
Menopause is characterized by the depletion of estrogen that has been proposed to cause oxidative stress. Circadian rhythm is an internal biological clock that controls physiological processes. It was analyzed the gene expression in peripheral blood mononuclear cells and the lipids and glucose levels in plasma of a subgroup of 17 pre-menopausal women, 19 men age-matched as control group for the pre-menopausal women, 20 post-menopausal women and 20 men age-matched as control group for the post-menopausal women; all groups were matched by body mass index...
April 10, 2017: Mechanisms of Ageing and Development
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