journal
MENU ▼
Read by QxMD icon Read
search

Mechanisms of Ageing and Development

journal
https://www.readbyqxmd.com/read/28431907/telomere-shortening-during-aging-attenuation-by-antioxidants-and-anti-inflammatory-agents
#1
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
#2
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
#3
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
https://www.readbyqxmd.com/read/28408139/the-anti-inflammatory-effect-of-melatonin-in-sh-sy5y-neuroblastoma-cells-exposed-to-sublethal-dose-of-hydrogen-peroxide
#4
Chutikorn Nopparat, Varunya Chantadul, Kannika Permpoonputtana, Piyarat Govitrapong
Brain inflammaging is considered as one of the underlying factors of neurodegenerative diseases. The present study aimed to investigate the effects of melatonin, an endogenous indoleamine mainly synthesized by the pineal gland, on hydrogen peroxide (H2O2)-induced inflammaging state in SH-SY5Y cells. Our data showed that p21(Cip1) and p16(INK4a), cell cycle arrest markers, and the number of senescence-associated β-galactosidase (SA-βgal) staining increased significantly in H2O2-treated cells. Melatonin treatment could reverse this effect...
April 10, 2017: Mechanisms of Ageing and Development
https://www.readbyqxmd.com/read/28390822/the-genetics-of-human-longevity-an-intricacy-of-genes-environment-culture-and-microbiome
#5
REVIEW
Serena Dato, Giuseppina Rose, Paolina Crocco, Daniela Monti, Paolo Garagnani, Claudio Franceschi, Giuseppe Passarino
Approximately one-quarter of the variation in lifespan in developed countries can be attributed to genetic factors. However, even large population based studies investigating genetic influence on human lifespan have been disappointing, identifying only a few genes accounting for genetic susceptibility to longevity. Some environmental and lifestyle determinants associated with longevity have been identified, which interplay with genetic factors in an intricate way. The study of gene-environment and gene-gene interactions can significantly improve our chance to disentangle this complex scenario...
April 5, 2017: Mechanisms of Ageing and Development
https://www.readbyqxmd.com/read/28373051/telomere-length-profiles-in-primary-human-peritoneal-mesothelial-cells-are-consistent-with-senescence
#6
Melisa Lopez-Anton, András Rudolf, Duncan M Baird, Laureline Roger, Rhiannon E Jones, Janusz Witowski, Donald J Fraser, Timothy Bowen
Mesothelial cell (MC) senescence contributes to malignancy and tissue fibrosis. The role of telomere erosion in MC senescence remains controversial, with evidence for both telomere-dependent and telomere-independent mechanisms reported. Single telomere length analysis revealed considerable telomere length heterogeneity in freshly isolated human peritoneal MCs, reflecting a heterogeneous proliferative history and providing high-resolution evidence for telomere-dependent senescence. By contrast the attenuated replicative lifespan, lack of telomere erosion and induction of p16 expression in in vitro-aged cells was consistent with stress-induced senescence...
April 1, 2017: Mechanisms of Ageing and Development
https://www.readbyqxmd.com/read/28347693/ctt1-overexpression-increases-the-replicative-lifespan-of-mms-sensitive-saccharomyces-cerevisiae-deficient-in-ksp1
#7
Wei Zhao, Hua-Zhen Zheng, Tao Zhou, Xiao-Shan Hong, Hong-Jing Cui, Zhi-Wen Jiang, Hui-Ji Chen, Zhong-Jun Zhou, Xin-Guang Liu
Ksplp is a nuclear-localized Ser/Thr kinase that is not essential for the vegetative growth of yeast. A global gene function analysis in yeast suggested that Ksplp was involved in the oxidative stress response; however, the underlying mechanism remains unclear. Here, we showed that KSP1-deficient yeast cells exhibit hypersensitivity to the DNA alkylating agent methyl methanesulphonate (MMS), and treatment of the KSP1-deficient strain with MMS could trigger abnormal mitochondrial membrane potential and up-regulate reactive oxygen species (ROS) production...
March 25, 2017: Mechanisms of Ageing and Development
https://www.readbyqxmd.com/read/28347692/mir-21-5p-203a-3p-promote-ox-ldl-induced-endothelial-cell-senescence-through-down-regulation-of-mitochondrial-fission-protein-drp1
#8
Jie-Jie Zhang, Wei-Qi Liu, Jing-Jie Peng, Qi-Lin Ma, Jun Peng, Xiu-Ju Luo
This study aims to identify both endothelia-specific/enriched and senescence-associated miRNAs as well as their functions. The rats were fed on high-fat diet to establish a hyperlipidemic model, which showed an increase in plasma lipids and acceleration in endothelial senescence and endothelial dysfunction, accompanied by alterations in 7 endothelia-specific/enriched and senescence-associated miRNAs. Among the 7 selected miRNAs, miR-21-5p and miR-203a-3p were significantly up-regulated in a human umbilical vein endothelial cells (HUVECs) senescent model induced by ox-LDL, consistent with their changes in the hyperlipidemic rats...
March 24, 2017: Mechanisms of Ageing and Development
https://www.readbyqxmd.com/read/28343910/anti-skin-aging-effect-of-epigallocatechin-gallate-by-regulating-epidermal-growth-factor-receptor-pathway-on-aging-mouse-model-induced-by-d-galactose
#9
Jiming Chen, Yifan Li, Qiangqiang Zhu, Tong Li, Hao Lu, Nan Wei, Yewei Huang, Ruoyu Shi, Xiao Ma, Xuanjun Wang, Jun Sheng
Epigallocatechin gallate(EGCG) is a monomer separated from tea catechins, as an well-known antioxidant, which helps fight wrinkles and rejuvenate skin cells. In this study, we investigated the anti-aging effect of EGCG, and to clarify underlying mechanism of skin aging in a d-galactose-induced aging mouse model. Forty-five male mice were divided into 5 groups and treated with different dose of EGCG, Vitamin C (VitC) to mice as a positive control. All groups except vehicle were established aging model induced by d-galactose (200mg/kg/day) that was subcutaneously injected to mice for 8 weeks...
March 24, 2017: Mechanisms of Ageing and Development
https://www.readbyqxmd.com/read/28327364/telomere-length-analysis-in-down-syndrome-birth
#10
Pranami Bhaumik, Mandar Bhattacharya, Priyanka Ghosh, Sujay Ghosh, Subrata Kumar Dey
Human reproductive fitness depends upon telomere chemistry. Maternal age, meiotic nondisjunction error and telomere length of mother of trisomic child are someway associated. Reports exhibiting maternal inheritance of telomere length in Down syndrome child are very scanty. To investigate this, we collected peripheral blood from 170 mothers of Down syndrome child and 186 age matched mothers of euploid child with their newly born babies. Telomere length was measured by restriction digestion - southern blotting technique...
March 19, 2017: Mechanisms of Ageing and Development
https://www.readbyqxmd.com/read/28322848/cd34-cell-count-predicts-long-lasting-life-in-the-oldest-old
#11
Giuseppe Mandraffino, Caterina Oriana Aragona, Giorgio Basile, Valentina Cairo, Federica Mamone, Carmela Morace, Angela D'Ascola, Angela Alibrandi, Alberto Lo Gullo, Saverio Loddo, Antonino Saitta, Egidio Imbalzano
Circulating progenitor cells (CPCs) represent a pool of cells capable of differentiating into mature cells of different organs and systems, promoting tissue maintenance and repair. Among CPCs, CD34+cells (CD34+CPCs) seem to predict outcome in CV disease, also in elderly people. A decline in CD34+CPCs was reported with advancing age. Moreover, aging is associated with a state of chronic inflammation, influencing life expectancy. Our purpose was to investigate a 10-year predictive ability of CD34+CPCs, inflammatory marker levels, classic CV risk factors (CVRFs), and Framingham Risk Score (FRS) in a population of healthy, self-sufficient octogenarians...
March 16, 2017: Mechanisms of Ageing and Development
https://www.readbyqxmd.com/read/28315697/the-role-of-the-tor-pathway-in-mediating-the-link-between-nutrition-and-longevity
#12
REVIEW
Oleh Lushchak, Olha Strilbytska, Veronika Piskovatska, Kenneth B Storey, Alexander Koliada, Alexander Vaiserman
The target of rapamycin (TOR) pathway integrates signals from extracellular and intracellular agents, such as growth factors, nutrients, mediators of energy balance, oxygen availability and other environmental cues. It allows the regulation of multiple cellular processes including protein and lipid synthesis, ribosome biogenesis, autophagy and metabolic processes. Being conserved across different phyla, TOR regulates longevity of various organisms in response to dietary conditions. In this review we described the main components of the TOR pathway and its upstream effectors and downstream processes in relation to aging...
March 16, 2017: Mechanisms of Ageing and Development
https://www.readbyqxmd.com/read/28315698/worldwide-demography-of-centenarians
#13
REVIEW
Jean-Marie Robine, Sarah Cubaynes
The global number of centenarians should strongly increase during the 21 st century. According to the Population Division of the United Nations it should reach more than 25 million people in 2100. To better understand the dynamics of the emergence and growth of the centenarian population, we focused on four European countries having long chronological series and high quality data about centenarians, Denmark, France, Sweden, and Switzerland, and Japan which has had the highest life expectancy at birth for several years...
March 15, 2017: Mechanisms of Ageing and Development
https://www.readbyqxmd.com/read/28286215/thyroid-hormones-in-extreme-longevity
#14
REVIEW
Sabrina Garasto, Alberto Montesanto, Andrea Corsonello, Fabrizia Lattanzio, Sergio Fusco, Giuseppe Passarino, Valeria Prestipino Giarritta, Francesco Corica
The aim of the present review was to summarize knowledge about thyroid hormones (THs) and longevity. Longevity is a complex multifactorial phenomenon on which specific biological pathways, including hormonal networks involved in the regulation of homeostasis and survival, exert a strong impact. THs are the key responsible for growth, metabolism rate and energy expenditure, and help in maintaining cognition, bone and cardiovascular health. THs production and metabolism are fine tuned, and may help the organism to cope with a variety of environmental challenges...
March 9, 2017: Mechanisms of Ageing and Development
https://www.readbyqxmd.com/read/28286214/cognitive-status-in-the-oldest-old-and-centenarians-a-condition-crucial-for-quality-of-life-methodologically-difficult-to-assess
#15
REVIEW
Beatrice Arosio, Rita Ostan, Daniela Mari, Sarah Damanti, Francesco Ronchetti, Sara Arcudi, Maria Scurti, Claudio Franceschi, Daniela Monti
Human life expectancy and the number of the oldest old are rapidly increasing worldwide. Advanced age is the main risk factor for dementia, representing one of the major causes of disability/dependency among older people with a strong impact on their families/caregivers. Centenarians have reached the extreme limits of human life escaping or delaying the major age-related diseases. Thus, these extraordinary individuals embody the best model to answer the crucial question if cognitive decline and dementia are progressive and unavoidable occurrences of increasing age...
March 9, 2017: Mechanisms of Ageing and Development
https://www.readbyqxmd.com/read/28284714/strain-specificities-in-cellular-and-molecular-immunopathogenic-mechanisms-underlying-development-of-experimental-autoimmune-encephalomyelitis-in-aged-rats
#16
Mirjana Nacka-Aleksić, Zorica Stojić-Vukanić, Ivan Pilipović, Ivana Vujnović, Biljana Bufan, Mirjana Dimitrijević, Gordana Leposavić
To understand strain-specificities of immune system in aged rats and their immunopathological implications, CD4+ T lymphocyte-mediated neuroinflammation in experimental autoimmune encephalomyelitis (EAE) was studied in two strains. Upon immunization for EAE, 22-24-month-old Albino Oxford (AO) rats developed milder neurological deficit of prolonged duration compared with their Dark Agouti (DA) counterparts. Consistently, they exhibited: (i) diminished neuroantigen-specific CD4+ T lymphocyte generation in draining lymph nodes (reflecting lower density of high-affinity IL-2 receptor complex on their surface and higher CD4+FoxP3+CD25+ regulatory cell frequency); (ii) less favorable spinal cord expression of CXCL12 and CCL2, and consequently diminished infiltration of neuroantigen-specific CD4+ T lymphocytes, including highly pathogenic IL-17+IFN-γ+ ones, and inflammatory monocytes into the spinal cord and (iii) subsequently impaired CD4+ T lymphocyte reactivation/survival and differentiation into highly pathogenic IL-17+ cells (reflecting downregulated expression of IL-1β, IL-6 and IL-23/p19)...
March 8, 2017: Mechanisms of Ageing and Development
https://www.readbyqxmd.com/read/28267566/aging-and-efficiency-in-living-systems-complexity-adaptation-and-self-organization
#17
Atanu Chatterjee, Georgi Georgiev, Germano Iannacchione
Living systems are open, out-of-equilibrium thermodynamic entities, that maintain order by locally reducing their entropy. Aging is a process by which these systems gradually lose their ability to maintain their out-of-equilibrium state, as measured by their free-energy rate density, and hence, their order. Thus, the process of aging reduces the efficiency of those systems, making them fragile and less adaptive to the environmental fluctuations, gradually driving them towards the state of thermodynamic equilibrium...
March 3, 2017: Mechanisms of Ageing and Development
https://www.readbyqxmd.com/read/28259747/exosome-based-immunomodulation-during-aging-a-nano-perspective-on-inflamm-aging
#18
REVIEW
Francesco Prattichizzo, Luigina Micolucci, Monica Cricca, Sabrina De Carolis, Emanuela Mensà, Antonio Ceriello, Antonio Domenico Procopio, Massimiliano Bonafè, Fabiola Olivieri
Exosomes are nanovesicles formed by inward budding of endosomal membranes. They exert complex immunomodulatory effects on target cells, acting both as antigen-presenting vesicles and as shuttles for packets of information like proteins, coding and non-coding RNA, and nuclear and mitochondrial DNA fragments. Albeit different, all such functions seem to be encompassed in the adaptive mechanism mediating the complex interactions of the organism with a variety of stressors, providing both for defense and for the evolution of symbiotic relationships with others organisms (gut microbiota, bacteria, and viruses)...
March 1, 2017: Mechanisms of Ageing and Development
https://www.readbyqxmd.com/read/28249716/conserved-effect-of-aging-on-dna-methylation-and-association-with-ezh2-polycomb-protein-in-mice-and-humans
#19
Khyobeni Mozhui, Ashutosh K Pandey
In humans, DNA methylation at specific CpG sites can be used to estimate the 'epigenetic clock', a biomarker of aging and health. The mechanisms that regulate the aging epigenome and level of conservation are not entirely clear. We performed affinity-based enrichment with methyl-CpG binding domain protein followed by high-throughput sequencing (MBD-seq) to assay DNA methylation in mouse samples. Consistent with previous reports, aging is associated with increase in methylation at CpG islands that likely overlap regulatory regions of genes that have been implicated in cancers (e...
February 27, 2017: Mechanisms of Ageing and Development
https://www.readbyqxmd.com/read/28242236/centenarians-as-extreme-phenotypes-an-ecological-perspective-to-get-insight-into-the-relationship-between-the-genetics-of-longevity-and-age-associated-diseases
#20
REVIEW
Cristina Giuliani, Chiara Pirazzini, Massimo Delledonne, Luciano Xumerle, Patrick Descombes, Julien Marquis, Giacomo Mengozzi, Daniela Monti, Dina Bellizzi, Giuseppe Passarino, Donata Luiselli, Claudio Franceschi, Paolo Garagnani
In this review we address the genetic continuum between aging and age-related diseases, with particular attention to the ecological perspective. We describe the connections between genes that promote longevity and genes associated to age-related diseases considering trade-off mechanisms in which the same genetic variants could have different effect according to the tissue considered and could be involved in several biological pathways. Then we describe mechanisms of antagonistic pleiotropy, focusing on the complex interplay between genetic variants and environmental changes (internal or external)...
February 24, 2017: Mechanisms of Ageing and Development
journal
journal
22971
1
2
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"