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Epigenetic and aging

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https://www.readbyqxmd.com/read/29145503/zinc-sulfate-contributes-to-promote-telomere-length-extension-via-increasing-telomerase-gene-expression-telomerase-activity-and-change-in-the-tert-gene-promoter-cpg-island-methylation-status-of-human-adipose-derived-mesenchymal-stem-cells
#1
Raheleh Farahzadi, Ezzatollah Fathi, Seyed Alireza Mesbah-Namin, Nosratollah Zarghami
The use of mesenchymal stem cells (MSCs) for cell therapy and regenerative medicine has received widespread attention over the past few years, but their application can be complicated by factors such as reduction in proliferation potential, the senescent tendency of the MSCs upon expansion and their age-dependent decline in number and function. It was shown that all the mentioned features were accompanied by a reduction in telomerase activity and telomere shortening. Furthermore, the role of epigenetic changes in aging, especially changes in promoter methylation, was reported...
2017: PloS One
https://www.readbyqxmd.com/read/29144154/sleep-quality-and-methylation-status-of-selected-tumor-suppressor-genes-among-nurses-and-midwives
#2
Agnieszka Bukowska-Damska, Edyta Reszka, Pawel Kaluzny, Edyta Wieczorek, Monika Przybek, Shanbeh Zienolddiny, Beata Peplonska
Chronic sleep restriction may affect metabolism, hormone secretion patterns and inflammatory responses. Limited reports suggest also epigenetic effects, such as changes in DNA methylation profiles. The study aims to assess the potential association between poor sleep quality or sleep duration and the levels of 5-methylcytosine in the promoter regions of selected tumor suppressor genes. A cross-sectional study was conducted on 710 nurses and midwives aged 40-60 years. Data from interviews regarding sleep habits and potential confounders were used...
November 16, 2017: Chronobiology International
https://www.readbyqxmd.com/read/29143608/physical-activity-in-the-prevention-of-human-diseases-role-of-epigenetic-modifications
#3
REVIEW
Elisa Grazioli, Ivan Dimauro, Neri Mercatelli, Guan Wang, Yannis Pitsiladis, Luigi Di Luigi, Daniela Caporossi
Epigenetic modification refers to heritable changes in gene function that cannot be explained by alterations in the DNA sequence. The current literature clearly demonstrates that the epigenetic response is highly dynamic and influenced by different biological and environmental factors such as aging, nutrient availability and physical exercise. As such, it is well accepted that physical activity and exercise can modulate gene expression through epigenetic alternations although the type and duration of exercise eliciting specific epigenetic effects that can result in health benefits and prevent chronic diseases remains to be determined...
November 14, 2017: BMC Genomics
https://www.readbyqxmd.com/read/29138870/insig2-rs7566605-single-nucleotide-variant-and-global-dna-methylation-index-levels-are-associated-with-weight-loss-in-a-personalized-weight-reduction-program
#4
Francesca Pirini, Sebastian Rodriguez-Torres, Bola Grace Ayandibu, María Orera-Clemente, Alberto Gonzalez-de la Vega, Fahcina Lawson, Roland J Thorpe, David Sidransky, Rafael Guerrero-Preston
Single nucleotide polymorphisms associated with lipid metabolism and energy balance are implicated in the weight loss response caused by nutritional interventions. Diet‑induced weight loss is also associated with differential global DNA methylation. DNA methylation has been proposed as a predictive biomarker for weight loss response. Personalized biomarkers for successful weight loss may inform clinical decisions when deciding between behavioral and surgical weight loss interventions. The aim of the present study was to investigate the association between global DNA methylation, genetic variants associated with energy balance and lipid metabolism, and weight loss following a non‑surgical weight loss regimen...
November 14, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29138005/distinct-hypoxic-regulation-of-preadipocyte-factor-1-pref-1-in-preadipocytes-and-mature-adipocytes
#5
Yunwon Moon, Seongyeol Lee, Bongju Park, Hyunsung Park
Preadipocyte factor-1 (Pref-1) is a secretory soluble protein, which exerts pleiotropic effects on maintenance of cancer stem cell characteristics and commitment of mesenchymal stem cell lineages by inhibiting adipogenesis. Observations that obesity renders the microenvironment of adipose tissues hypoxic and that hypoxia inhibits adipogenesis lead us to investigate whether hypoxia increases the expression of anti-adipogenic Pref-1 in preadipocytes, mature adipocytes, and adipose tissues from obese mouse. In 3T3-L1 preadipocytes, hypoxia induces Pref-1 by a hypoxia-inducible factor 1 (HIF-1)-dependent mechanism accompanied by increase in the levels of the active histone mark, acetylated H3K9/14 (H3K9/14Ac)...
November 11, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/29132937/arsenic-exposure-during-embryonic-development-alters-the-expression-of-the-long-noncoding-rna-growth-arrest-specific-5-gas5-in-a-sex-dependent-manner
#6
Kevin K Caldwell, Alexander Hafez, Elizabeth Solomon, Matthew Cunningham, Andrea M Allan
Our previous studies suggest that prenatal arsenic exposure (50ppb) modifies epigenetic control of the programming of the glucocorticoid receptor (GR) signaling system in the developing mouse brain. These deficits may lead to long-lasting consequences, including deficits in learning and memory, increased depressive-like behaviors, and an altered set-point of GR feedback throughout life. To understand the arsenic-induced changes within the GR system, we assessed the impact of in utero arsenic exposure on the levels of the GR and growth arrest-specific-5 (Gas5), a noncoding RNA, across a key gestational period for GR programming (gestational days, GD 14-18) in mice...
November 10, 2017: Neurotoxicology and Teratology
https://www.readbyqxmd.com/read/29132028/dna-methylation-and-genetic-variation-of-the-angiotensin-converting-enzyme-ace-in-depression
#7
Dilys Lam, Marie-Laure Ancelin, Karen Ritchie, Richard Saffery, Joanne Ryan
BACKGROUND: Depression is one of the most prevalent psychiatric disorders, and in older persons is associated with high levels of comorbidity and under-treatment. Dysfunction of the hypothalamic-pituitary-adrenal (HPA) stress axis is consistently observed in the older population as well as depressed patients, with the angiotensin converting enzyme (ACE) a key regulator of the stress response. Epigenetic regulation of ACE may play an important role in HPA axis (dys)regulation. OBJECTIVE: To investigate ACE promoter methylation as a biomarker of late-life depression, and its association with genetic variation and cortisol secretion...
November 8, 2017: Psychoneuroendocrinology
https://www.readbyqxmd.com/read/29129676/exercise-enhances-cognitive-function-and-neurotrophin-expression-in-the-hippocampus-accompanied-by-changes-in-epigenetic-programming-in-senescence-accelerated-mice
#8
Hiroshi Maejima, Naohiko Kanemura, Takanori Kokubun, Kenji Murata, Kiyomi Takayanagi
Aerobic exercise is known to increase expression of neurotrophins, particularly brain-derived neurotrophic factor (BDNF), in the hippocampus and to improve cognitive function. Exercise exerts neuroprotective effects in the hippocampus by inducing epigenetic changes, which play crucial roles in aging and neurodegenerative diseases. Specifically, the activity levels of histone acetyltransferases (HATs) and histone deacetylases (HDACs) regulate histone acetylation and modulate gene transcription. The objective of the present study was to assess the interactive effects of exercise and aging on cognitive function, expression of neurotrophins (BDNF and neurotrophin-4) and their receptors (tyrosine receptor kinase B and p75), and epigenetic regulations, including the activity of HATs and HADCs in the hippocampus...
November 9, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/29129606/transgenerational-blunting-of-morphine-induced-corticosterone-secretion-is-associated-with-dysregulated-gene-expression-in-male-offspring
#9
Fair M Vassoler, Anika M Toorie, Elizabeth M Byrnes
A number of parental experiences, even when occurring prior to conception, have been shown to induce transgenerational effects beyond the first generation. In the case of exposure to drugs of abuse, studies in rodents suggest that offspring demonstrate significant differences in how they respond to the drug to which their parent was exposed. We have previously observed significant alterations in morphine analgesia, conditioned place preference and self-administration in the offspring of females exposed to morphine during adolescent development...
November 9, 2017: Brain Research
https://www.readbyqxmd.com/read/29124997/perinatal-exposure-to-environmental-tobacco-smoke-is-associated-with-changes-in-dna-methylation-that-precede-the-adult-onset-of-lung-disease-in-a-mouse-model
#10
Elizabeth Cole, Traci A Brown, Kent E Pinkerton, Britten Postma, Keegan Malany, Mihi Yang, Yang Jee Kim, Raymond F Hamilton, Andrij Holian, Yoon Hee Cho
Prenatal and early-life environmental tobacco smoke (ETS) exposure can induce epigenetic alterations associated with inflammation and respiratory disease. The objective of this study was to address the long-term epigenetic consequences of perinatal ETS exposure on latent respiratory disease risk, which are still largely unknown. C57BL/6 mice were exposed to prenatal and early-life ETS; offspring lung pathology, global DNA, and gene-specific methylation were measured at two adult ages. Significant alterations in global DNA methylation and promoter methylation of IFN-γ and Thy-1 were found in ETS-exposed offspring at 10-12 and 20 weeks of age...
August 2017: Inhalation Toxicology
https://www.readbyqxmd.com/read/29123662/chronic-postsurgical-pain-is-there-a-possible-genetic-link
#11
Sabu Kumar James
Persistent or chronic postsurgical pain (CPSP) has been defined as 'pain persisting beyond 2 months'. The cut-off limit of 2 months has been controversial, and some researchers argue for a 3-month period for the definition of CPSP. Multiple mechanisms, including both patient and surgical, have been shown to influence this transition. Patient factors include age, gender, anxiety, depression, somatisation, catastrophising, pre-existing pain anywhere and pain at the site of surgery. The various surgical factors include site and nature of surgery, infection, inflammation and repeat surgery...
November 2017: British Journal of Pain
https://www.readbyqxmd.com/read/29121143/mismatch-repair-deficiency-testing-in-patients-with-colorectal-cancer-and-nonadherence-to-testing-guidelines-in-young-adults
#12
Talha Shaikh, Elizabeth A Handorf, Joshua E Meyer, Michael J Hall, Nestor F Esnaola
Importance: Mismatch repair (MMR) deficiency of DNA has been observed in up to 15% of sporadic colorectal cancers (CRCs) and is a characteristic feature of Lynch syndrome, which has a higher incidence in young adults (age, <50 years) with CRC. Mismatch repair deficiency can be due to germline mutations or epigenetic inactivation, affects prognosis and response to systemic therapy, and results in unrepaired repetitive DNA sequences, which increases the risk of multiple malignant tumors...
November 9, 2017: JAMA Oncology
https://www.readbyqxmd.com/read/29119288/renal-macrophages-and-dendritic-cells-in-sle-nephritis
#13
REVIEW
Naomi I Maria, Anne Davidson
PURPOSE OF REVIEW: The purpose of the study was to review the characteristics of renal macrophages and dendritic cells during homeostasis and disease, with a particular focus on lupus nephritis. RECENT FINDINGS: Resident renal macrophages derive from embryonic sources and are long-lived and self-renewing; they are also replaced from the bone marrow with age. The unique characteristics of macrophages in each tissue are imposed by the microenvironment and reinforced by epigenetic modifications...
November 9, 2017: Current Rheumatology Reports
https://www.readbyqxmd.com/read/29118760/septic-shock-and-the-aging-process-a-molecular-comparison
#14
Fabiano Pinheiro da Silva, Marcel Cerqueira César Machado
Aging is a continuous process promoted by both intrinsic and extrinsic factors that each trigger a multitude of molecular events. Increasing evidence supports a central role for inflammation in this progression. Here, we discuss how the low-grade chronic inflammation that characterizes aging is tightly interconnected with other important aspects of this process, such as DNA damage, mitochondrial dysfunction, and epigenetic changes. Similarly, inflammation also plays a critical role in many morbid conditions that affect patients who are admitted to Intensive Care...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/29117360/racial-and-ethnic-disparities-in-the-incidence-of-pediatric-extracranial-embryonal-tumors
#15
Paola Friedrich, Elena Itriago, Carlos Rodriguez-Galindo, Karina Ribeiro
Background: Few studies have comparatively assessed differences in the incidence of childhood cancer by race and ethnicity that could inform etiologic research. We aimed to identify disparities in the incidence of pediatric extracranial embryonal tumors by race and ethnicity in the United States using a population-based cancer registry. Methods: Cases of extracranial embryonal tumors among children age 0 to 19 years diagnosed between 2000 and 2010 were retrieved from the Surveillance, Epidemiology, and End Results Program 18 (n = 8188)...
October 1, 2017: Journal of the National Cancer Institute
https://www.readbyqxmd.com/read/29115628/aberrant-hypermethylation-of-the-hoxd10-gene-in-papillary-thyroid-cancer-with-brafv600e-mutation
#16
Yi-Ming Cao, Jun Gu, Yan-Shu Zhang, Wen-Jun Wei, Ning Qu, Duo Wen, Tian Liao, Rong-Liang Shi, Ling Zhang, Qing-Hai Ji, Yu Wang, Guo-Hua Sun, Yang-Xing Zhao, Yuan-Jin Wang, Jian Yu, Yong-Xue Zhu
Epigenetic abnormalities as well as genetic abnormalities may play a vital role in the tumorigenesis of papillary thyroid cancer (PTC). The present study aimed to analyze the function and methylation status of the HOXD10 gene in PTC and aimed to identify relationships between HOXD10 methylation, HOXD10 expression, BRAF mutation and clinicopathological characteristics of PTC. A total of 152 PTC patients were enrolled in the present study. The methylation status of the HOXD10 promoter was analyzed by quantitative methylation-specific polymerase chain reaction (Q-MSP)...
October 25, 2017: Oncology Reports
https://www.readbyqxmd.com/read/29113959/age-related-epigenetic-changes-in-hippocampal-subregions-of-four-animal-models-of-alzheimer-s-disease
#17
Roy Lardenoije, Daniël L A van den Hove, Monique Havermans, Anne van Casteren, Kevin X Le, Roberta Palmour, Cynthia A Lemere, Bart P F Rutten
Both aging and Alzheimer's disease (AD) are associated with widespread epigenetic changes, with most evidence suggesting global hypomethylation in AD. It is, however, unclear how these age-related epigenetic changes are linked to molecular aberrations as expressed in animal models of AD. Here, we investigated age-related changes of epigenetic markers of DNA methylation and hydroxymethylation in a range of animal models of AD, and their correlations with amyloid plaque load. Three transgenic mouse models, including the J20, APP/PS1dE9 and 3xTg-AD models, as well as Caribbean vervets (a non-transgenic non-human primate model of AD) were investigated...
November 4, 2017: Molecular and Cellular Neurosciences
https://www.readbyqxmd.com/read/29113830/sex-and-age-associated-differences-in-episodic-like-memory-and-transcriptional-regulation-of-hippocampal-steroidogenic-enzymes-in-rats
#18
María F Rossetti, Jorgelina Varayoud, María F Andreoli, Cora Stoker, Enrique H Luque, Jorge G Ramos
The aim of this study was to evaluate the episodic-like memory (ELM) and the transcriptional regulation of the enzymes involved in hippocampal allopregnanolone synthesis in young adult and middle-aged male and female rats. Young adult males, but not middle-aged ones, showed a good performance in the ELM task. In contrast, neither young nor middle-aged females were able to discriminate the spatial order in which the objects were presented. In females, aging decreased the transcription of steroidogenic-related genes...
November 4, 2017: Molecular and Cellular Endocrinology
https://www.readbyqxmd.com/read/29113254/epigenetic-analysis-of-fhl1-tumor-suppressor-gene-in-human-liver-cancer
#19
Jun Wang, Fang Huang, Jian Huang, Jindan Kong, Shenglan Liu, Jun Jin
Liver cancer is one of the most common types of cancer among human malignancies. Four and a half LIM domains 1 (FHL1), as a tumor suppressor gene, is frequently downregulated in multiple types of human cancer. However, the role and specific mechanisms of FHL1 as a tumor suppressor in liver cancer are poorly understood. The present study aimed to investigate the role and associated mechanisms of FHL1 in human liver cancer. The level of FHL1 mRNA in hepatocellular carcinoma (HCC) tissue specimens and cell lines derived from the human liver was determined using reverse transcription polymerase chain reaction and western blot analysis...
November 2017: Oncology Letters
https://www.readbyqxmd.com/read/29112458/review-detrimental-effects-of-alcohol-exposure-around-conception-putative-mechanisms
#20
Jacinta I Kalisch-Smith, Karen M Moritz
In western countries, alcohol consumption is widespread in women of reproductive age, and in binge quantities. These countries also continue to have high incidences of unplanned pregnancies, with women often reported to cease drinking after discovering their pregnancy. This suggests the early embryo may be highly exposed to the detrimental effects of alcohol during this periconceptional period. The periconception and pre-implantation windows which includes maturation of the oocyte, fertilisation and morphogenesis of the pre-implantation embryo, are particularly sensitive times of development...
November 7, 2017: Biochemistry and Cell Biology, Biochimie et Biologie Cellulaire
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