keyword
MENU ▼
Read by QxMD icon Read
search

telomere length

keyword
https://www.readbyqxmd.com/read/28544158/molecular-and-physiological-manifestations-and-measurement-of-aging-in-humans
#1
REVIEW
Sadiya S Khan, Benjamin D Singer, Douglas E Vaughan
Biological aging is associated with a reduction in the reparative and regenerative potential in tissues and organs. This reduction manifests as a decreased physiological reserve in response to stress (termed homeostenosis) and a time-dependent failure of complex molecular mechanisms that cumulatively create disorder. Aging inevitably occurs with time in all organisms and emerges on a molecular, cellular, organ, and organismal level with genetic, epigenetic, and environmental modulators. Individuals with the same chronological age exhibit differential trajectories of age-related decline, and it follows that we should assess biological age distinctly from chronological age...
May 23, 2017: Aging Cell
https://www.readbyqxmd.com/read/28543303/effects-of-androgen-deprivation-therapy-on-telomere-length
#2
Ada S Cheung, Bu B Yeap, Rudolf Hoermann, Jennie Hui, John P Beilby, Mathis Grossmann
OBJECTIVE: Recent evidence suggests that androgens either directly or via aromatisation to oestradiol may regulate telomere length, hence providing a mechanism whereby reproductive steroids are linked to biological aging in men. Using men with prostate cancer initiating androgen deprivation therapy (ADT), we tested the hypothesis that severe sex steroid deprivation would accelerate telomere shortening. DESIGN: We conducted a secondary analysis of a 2-year prospective controlled study among 65 men with non-metastatic prostate cancer newly commencing adjuvant ADT (n=40) and age- and radiotherapy-matched prostate cancer controls (n=25)...
May 24, 2017: Clinical Endocrinology
https://www.readbyqxmd.com/read/28542264/child-mortality-hypothalamic-pituitary-adrenal-axis-activity-and-cellular-aging-in-mothers
#3
Cindy K Barha, Katrina G Salvante, Courtney W Hanna, Samantha L Wilson, Wendy P Robinson, Rachel M Altman, Pablo A Nepomnaschy
Psychological challenges, including traumatic events, have been hypothesized to increase the age-related pace of biological aging. Here we test the hypothesis that psychological challenges can affect the pace of telomere attrition, a marker of cellular aging, using data from an ongoing longitudinal-cohort study of Kaqchikel Mayan women living in a population with a high frequency of child mortality, a traumatic life event. Specifically, we evaluate the associations between child mortality, maternal telomere length and the mothers' hypothalamic-pituitary-adrenal axis (HPAA), or stress axis, activity...
2017: PloS One
https://www.readbyqxmd.com/read/28540339/leukocyte-telomere-length-and-serum-levels-of-high-molecular-weight-adiponectin-and-dehydroepiandrosterone-sulfate-could-reflect-distinct-aspects-of-longevity-in-japanese-centenarians
#4
Yuji Aoki, Masato Aoki, Kazuya Yamada
Leukocyte telomere length and serum levels of high-molecular-weight adiponectin and dehydroepiandrosterone-sulfate (DHEA-S) were assessed in association with nutrition and performance status (PS) in Japanese centenarians. Twenty-three centenarians (five men, 18 women) were classified according to their PS 1 (nearly fully ambulatory, n = 2), 2 (in bed less than 50% of daytime, n = 10), 3 (in bed greater than 50%, n = 6), and 4 (completely bedridden, n = 5). Leukocyte telomere length was determined by the hybridization protection assay, and the adiponectin and DHEA-S levels were measured by chemiluminescent enzyme immunoassay...
January 2017: Gerontology & Geriatric Medicine
https://www.readbyqxmd.com/read/28536575/inflammatory-long-pentraxin-3-is-associated-with-leukocyte-telomere-length-in-night-shift-workers
#5
Sofia Pavanello, Mariarita Stendardo, Giuseppe Mastrangelo, Melissa Bonci, Barbara Bottazzi, Manuela Campisi, Marco Nardini, Roberto Leone, Alberto Mantovani, Piera Boschetto
Aging is an emerging worldwide threat to public health, even in the workplace, as it links with risk of illness and death. Bewildered inflammatory responses and stressful conditions associate with age-related disorders. Additionally, circadian rhythm disruption, a critical health issue in night-shift workers, correlates with premature aging. We investigated the hypothesis of a link between altered inflammatory response, detected by plasmatic long pentraxin 3 (PTX3), and biological aging, measured by leukocyte telomere length (LTL), attrition, and possibly induced by night-shift work...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28535365/leukocyte-telomere-length-in-postmenopausal-women
#6
Holly J Jones, Susan L Janson, Kathryn A Lee
OBJECTIVE: To compare leukocyte telomere length (LTL) by race and describe demographic, health, and psychosocial factors associated with LTL in postmenopausal women. DESIGN: Descriptive study with comparative analyses and correlations. SETTING: Data were collected at the University of California-San Francisco, San Francisco Clinical and Translational Science Institute. PARTICIPANTS: Thirty-nine African American and White postmenopausal women between 58 and 65 years of age (mean age = 61...
May 20, 2017: Journal of Obstetric, Gynecologic, and Neonatal Nursing: JOGNN
https://www.readbyqxmd.com/read/28535013/htert-c250t-promoter-mutation-and-telomere-length-as-a-molecular-markers-of-cancer-progression-in-patients-with-head-and-neck-cancer
#7
Wojciech Barczak, Wiktoria M Suchorska, Agnieszka Sobecka, Karolina Bednarowicz, Piotr Machczynski, Pawel Golusinski, Blazej Rubis, Michal M Masternak, Wojciech Golusinski
Squamous cell carcinoma of the head and neck (HNSCC) is the sixth leading cause of cancer worldwide, representing over half a million incidents every year. Cancer cells, including HNSCC, are characterized by increased telomerase activity. This enzymatic complex is active in ~90% of all cancer types and is responsible for the lengthening of telomeres. Highly recurrent point mutations in the human telomerase reverse transcriptase (hTERT) promoter have recently been reported in a number of human neoplasms. The aim of the present study was to analyze the prevalence of the hTERT promoter C250T mutation and telomere length in the blood leukocytes of 61 patients with HNSCC and 49 healthy individuals...
May 17, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28524249/telomere-attrition-and-growth-a-life-history-framework-and-case-study-in-common-terns
#8
Oscar Vedder, Simon Verhulst, Christina Bauch, Sandra Bouwhuis
The relationship between growth and age-specific telomere length, as a proxy of somatic state, is increasingly investigated, but observed patterns vary and a predictive framework is lacking. We outline expectations based on the assumption that telomere maintenance is costly and argue that individual heterogeneity in resource acquisition is predicted to lead to positive covariance between growth and telomere length. However, canalization of resource allocation to the trait with a larger effect on fitness, rendering that trait relatively invariant, can cause the absence of covariance...
May 19, 2017: Journal of Evolutionary Biology
https://www.readbyqxmd.com/read/28522851/mouse-rif1-is-a-regulatory-subunit-of-protein-phosphatase-1-pp1
#9
Rasa Sukackaite, Daniela Cornacchia, Malene Ringkjøbing Jensen, Philippe J Mas, Martin Blackledge, Elin Enervald, Guangyou Duan, Tania Auchynnikava, Maja Köhn, Darren J Hart, Sara B C Buonomo
Rif1 is a conserved protein that plays essential roles in orchestrating DNA replication timing, controlling nuclear architecture, telomere length and DNA repair. However, the relationship between these different roles, as well as the molecular basis of Rif1 function is still unclear. The association of Rif1 with insoluble nuclear lamina has thus far hampered exhaustive characterization of the associated protein complexes. We devised a protocol that overcomes this problem, and were thus able to discover a number of novel Rif1 interactors, involved in chromatin metabolism and phosphorylation...
May 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28522577/shorter-leukocyte-telomere-length-is-associated-with-higher-risk-of-infections-a-prospective-study-of-75-309-individuals-from-the-general-population
#10
Jens Helby, Børge G Nordestgaard, Thomas Benfield, Stig E Bojesen
In the general population, older age is associated with short leukocyte telomere length and with high risk of infections. In a recent study of allogeneic hematopoietic cell transplantation for severe aplastic anemia, long donor leukocyte telomere length was associated with improved survival in the recipients. These findings suggest that leukocyte telomere length could possibly be a marker of immune competence. Therefore, we tested the hypothesis that shorter leukocyte telomere length is associated with higher risk of infectious disease hospitalization and infection related death...
May 18, 2017: Haematologica
https://www.readbyqxmd.com/read/28521619/processes-linking-religious-involvement-and-telomere-length
#11
Terrence D Hill, Preeti Vaghela, Christopher G Ellison, Sunshine Rote
Although numerous studies suggest that religious involvement is associated with better health and longer life expectancies, it is unclear whether these general patterns extend to cellular aging. The mechanisms linking indicators of religious involvement with indicators of cellular aging are also undefined. We employed longitudinal data from the 2004 and 2008 Health and Retirement Study, a national probability sample of Americans aged 50 and older, to test whether average telomere length varied according to level of religious attendance...
2017: Biodemography and Social Biology
https://www.readbyqxmd.com/read/28521363/a-cisplatin-derivative-tetra-pt-bpy-as-an-oncotherapeutic-agent-for-targeting-alt-cancer
#12
Xiao-Hui Zheng, Xin Nie, Yiming Fang, Zepeng Zhang, Yingnan Xiao, Zongwan Mao, Haiying Liu, Jian Ren, Feng Wang, Lixin Xia, Junjiu Huang, Yong Zhao
Background: In approximately 15% of human cancers, telomere length is maintained independently of telomerase by the homologous recombination (HR)-mediated alternative lengthening of telomeres (ALT) pathway. Whether the ALT pathway can be exploited for therapeutic treatment remains unknown. The purpose of this study is to develop oncotherapeutic agent to target ALT cancers. Methods: Surface plasmon resonance assay, antibody to G-quadruplex, and fluorescence in situ hybridization (FISH) were used to discover Tetra-Pt(bpy), a cisplatin derivative that specifically targets telomeric G-quadruplex...
October 1, 2017: Journal of the National Cancer Institute
https://www.readbyqxmd.com/read/28520570/long-term-exposure-to-mst-312-leads-to-telomerase-reverse-transcriptase-overexpression-in-mcf-7-breast-cancer-cells
#13
Karollyne S Morais, Ana Flávia R Guimarãesb, Doralina A R Ramos, Fábio P Silva, Diêgo M de Oliveira
Telomerase is an enzyme responsible for telomere maintenance in almost all human cancer cells, but generally not expressed in somatic ones. Therefore, antitelomerase therapy is a potentially revolutionary therapeutic strategy, and the antitumor activity of telomerase inhibitors (TI) has been studied extensively recently, mainly for breast cancer. However, the effects expected from treatment with TI will appear only after many cell divisions, but the effects of this long-term approach are unknown. In this work, the consequences of 3120 h exposure of human breast cancer cells to TI MST-312 were investigated...
May 17, 2017: Anti-cancer Drugs
https://www.readbyqxmd.com/read/28515879/sexual-signals-reflect-telomere-dynamics-in-a-wild-bird
#14
Conor Claverie Taff, Corey R Freeman-Gallant
Telomere dynamics in natural populations have been linked to survival, reproduction, and energetic investment. Given their putative role in mediating life-history trade-offs, telomeres are also a likely candidate for maintaining honesty in sexually selected signals; few studies to date, however, have demonstrated a correlation between sexual signals and telomere dynamics. Here, we show that plumage coloration in male common yellowthroats (Geothlypis trichas) is correlated with both relative telomere length and with the rate of telomere loss between years...
May 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/28515044/exploring-the-causal-pathway-from-telomere-length-to-coronary-heart-disease-a-network-mendelian-randomization-study
#15
Yiqiang Zhan, Ida K Karlsson, Robert Karlsson, Annika Tillander, Chandra A Reynolds, Nancy L Pedersen, Sara Hägg
Rationale: Observational studies have found shorter leukocyte telomere length to be a risk factor for coronary heart disease (CHD), and more recently the association was suggested to be causal. However, the relationship between telomere length and common metabolic risk factors for CHD is not well understood. Whether these risk factors could explain pathways from telomere length to CHD warrants further attention. Objective: To examine if metabolic risk factors for CHD mediate the causal pathway from short telomere length to increased risk of CHD using a network Mendelian randomization (MR) design...
May 17, 2017: Circulation Research
https://www.readbyqxmd.com/read/28512776/can-telomere-length-be-used-as-a-biomarker-for-cardiovascular-diseases-insights-from-a-large-clinical-study
#16
Shin-Hann Lee, Nigel Griffiths, Lisa Shao
Cardiovascular diseases (CVDs) remain among the leading causes of death worldwide. An accurate identification of individuals who are at risk of a cardiovascular event plays a critical role in successful preventative intervention This article is protected by copyright. All rights reserved.
May 17, 2017: Journal of Physiology
https://www.readbyqxmd.com/read/28510637/telomeres-nutrition-and-longevity-can-we-really-navigate-our-aging
#17
Nikolina Škrobot Vidacek, Lucia Nanic, Sanda Ravlic, Mary Sopta, Marko Geric, Goran Gajski, Vera Garaj-Vrhovac, Ivica Rubelj
Telomeres are dynamic chromosome-end structures that serve as guardians of genome stability. They are known to be one of the major determinants of aging and longevity in higher mammals. Studies have demonstrated a direct correlation between telomere length and life expectancy, stress, DNA damage, and onset of aging-related diseases. This review discusses the most important factors that influence our telomeres. Various genetic and environmental factors such as diet, physical activity, obesity, and stress are known to influence health and longevity as well as telomere dynamics...
May 16, 2017: Journals of Gerontology. Series A, Biological Sciences and Medical Sciences
https://www.readbyqxmd.com/read/28507575/association-between-telomere-length-and-complete-blood-count-in-us-adults
#18
Mohsen Mazidi, Peter Penson, Maciej Banach
INTRODUCTION: Telomere length (TL) is related to age-related health outcomes, but little is known about the relationship between TL and complete blood count (CBC) parameters. We aimed to determine the relationship between TL and CBC in a sample of healthy US adults. MATERIAL AND METHODS: Participants in the National Health and Nutrition Examination Survey (NHANES) recruited between 1999 and 2002 who had essential data on total CBC and TL were studied. We computed age- and race-adjusted mean values for total CBC using analysis of covariance (ANCOVA)...
April 1, 2017: Archives of Medical Science: AMS
https://www.readbyqxmd.com/read/28506770/prognostic-role-of-telomere-length-in-malignancies-a-meta-analysis-and-meta-regression
#19
Roman Adam, Laura Díez-González, Alberto Ocaña, Boštjan Šeruga, Eitan Amir, Arnoud J Templeton
Telomere length (TL) has been associated with several health conditions including cancer. To quantify the effect of TL on outcomes in malignancies and explore the role of type of TL measurement we conducted a librarian-led systematic search of electronic databases identified publications exploring the prognostic role of TL on cancer outcomes. Overall survival (OS) was the primary outcome measure while other time-to-event endpoints were secondary outcomes. Data from studies reporting a hazard ratio (HR) with 95% confidence interval (CI) and/or p-value were pooled in a meta-analysis...
May 12, 2017: Experimental and Molecular Pathology
https://www.readbyqxmd.com/read/28506636/multiple-dna-interactions-contribute-to-the-initiation-of-telomerase-elongation
#20
Ahu Karademir Andersson, Cecilia Gustafsson, Roopesh Krishnankutty, Marita Cohn
Telomerase maintains telomere length and chromosome integrity by adding short tandem repeats of single-stranded DNA to the 3' ends, via reverse transcription of a defined template region of its RNA subunit. To further understand the telomerase elongation mechanism, we studied the primer utilization and extension activity of the telomerase from the budding yeast Naumovozyma castellii (Saccharomyces castellii), which displays a processive nucleotide and repeat addition polymerization. For the efficient initiation of canonical elongation, telomerase required 4nt primer 3' end complementarity to the template RNA...
May 12, 2017: Journal of Molecular Biology
keyword
keyword
73405
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"