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Zhuang Z, Zhao Y, Huang N, Li Y, Wang W, Song Z, Dong X, Xiao W, Jia J, Liu Z, Qi L, Huang T. Associations of healthy aging index and all-cause and cause-specific mortality: a prospective cohort study of UK Biobank participants. GeroScience 2024; 46:1241-1257. [PMID: 37526907 PMCID: PMC10828282 DOI: 10.1007/s11357-023-00891-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2023] [Accepted: 07/24/2023] [Indexed: 08/02/2023] Open
Abstract
The healthy aging index (HAI) has been recently developed as a surrogate measure of biological age. However, to what extent the HAI is associated with all-cause and cause-specific mortality and whether this association differs in younger and older adults remains unknown. We aimed to quantify the association between the HAI and mortality in a population of UK adults. In the prospective cohort study, data are obtained from the UK Biobank. Five HAI components (systolic blood pressure, reaction time, cystatin C, serum glucose, forced vital capacity) were scored 0 (healthiest), 1, and 2 (unhealthiest) according to sex-specific tertiles or clinically relevant cut-points and summed to construct the HAI (range 0-10). Cox proportional hazard regression models were used to estimate the associations of the HAI with the risk of all-cause and cause-specific mortality. 387,794 middle-aged and older participants were followed up for a median of 8.9 years (IQR 8.3-9.5). A total of 14,112 all-cause deaths were documented. After adjustments, each 1-point increase in the HAI was related to a higher risk of all-cause mortality (hazards ratio [HR], 1.17; 95%CI, 1.15-1.18). Such association was stronger among adults younger than 60 years (1.19, 1.17-1.21) than that among those 60 years and older (1.15, 1.14-1.17) (P interaction < 0.001). For each unit increment of the HAI, the multivariate-adjusted HRs for risk of death were 1.28 (1.25-1.31) for cardiovascular diseases, 1.09 (1.07-1.10) for cancer, 1.36 (1.29-1.44) for digestive disease, 1.42 (1.35-1.48) for respiratory disease, 1.42 (1.33-1.51) for infectious diseases, and 1.15 (1.09-1.21) for neurodegenerative disease, respectively. Our findings indicate that the HAI is positively associated with all-cause and cause-specific mortality independent of chronological age. Our results further underscore the importance of effective early-life interventions to slow aging and prevent premature death.
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Affiliation(s)
- Zhenhuang Zhuang
- Department of Epidemiology & Biostatistics, School of Public Health, Peking University, Beijing, China
| | - Yimin Zhao
- Department of Epidemiology & Biostatistics, School of Public Health, Peking University, Beijing, China
| | - Ninghao Huang
- Department of Epidemiology & Biostatistics, School of Public Health, Peking University, Beijing, China
| | - Yueying Li
- Department of Epidemiology & Biostatistics, School of Public Health, Peking University, Beijing, China
| | - Wenxiu Wang
- Department of Epidemiology & Biostatistics, School of Public Health, Peking University, Beijing, China
| | - Zimin Song
- Department of Epidemiology & Biostatistics, School of Public Health, Peking University, Beijing, China
| | - Xue Dong
- Department of Epidemiology & Biostatistics, School of Public Health, Peking University, Beijing, China
| | - Wendi Xiao
- Department of Epidemiology & Biostatistics, School of Public Health, Peking University, Beijing, China
| | - Jinzhu Jia
- Department of Biostatistics, School of Public Health, Peking University, Beijing, China
| | - Zhonghua Liu
- Department of Biostatistics, Columbia University, New York, NY, USA
| | - Lu Qi
- Department of Epidemiology, School of Public Health and Tropical Medicine, Tulane University, New Orleans, LA, USA.
- Department of Nutrition, Harvard T.H. Chan School of Public Health, Boston, MA, USA.
| | - Tao Huang
- Department of Epidemiology & Biostatistics, School of Public Health, Peking University, Beijing, China.
- Key Laboratory of Epidemiology of Major Diseases (Peking University), Ministry of Education, Beijing, China.
- Center for Intelligent Public Health, Institute for Artificial Intelligence, Peking University, Beijing, China.
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Prévot D'Alvise N, Ascensio E, Richard S. Influence of EE2 exposure, age and sex on telomere length in European long-snouted seahorse (Hippocampus guttulatus). Gen Comp Endocrinol 2024; 346:114419. [PMID: 38040384 DOI: 10.1016/j.ygcen.2023.114419] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/15/2023] [Revised: 11/17/2023] [Accepted: 11/26/2023] [Indexed: 12/03/2023]
Abstract
After a Telomere Lengthening in juvenile stage, a progressive telomere shortening occurs with age despite higher telomerase level. Telomere Length (TL) may also reflect past physiological state such as a chronic chemical stress. Several studies have revealed a correlation between TL, ageing and/or sex in vertebrates, including teleosts; however, the patterns of telomere dynamics with telomerase mRNA expression, sex, lifespan or chemical stress in teleosts are unclear. The first aim of this study is to verify if telomere length is age and sex-dependent. The second aim is to consider if TL is a useful indicator of stress response in European long-snouted seahorse, Hippocampus guttulatus, an ectothermic and non-model system. We showed that after telomere lengthening during the juvenile stage, a telomeric attrition became significant in sexually mature individuals (p = 0.042). TL decreased in older seahorses despite the presence of somatic telomerase mRNA expression at all life stages studied. There was no difference in TL between males and females, but telomerase mRNA expression was consistently higher in females than males. Exposure to EE2 had no effect on TL in young seahorses, but was correlated with a significant increase in telomerase mRNA expression and various physiological disruptions. Here, a growth retardation of -10 % for body length (p = 0.016) and approximately -45 % for mass (p = 0.001) compared to healthy juvenile seahorses was observed. Our data suggest that telomere dynamics alone should not be used as a marker of EE2 exposure in juvenile seahorses.
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Affiliation(s)
- Nathalie Prévot D'Alvise
- Mediterranean Institute of Oceanography (MIO), UMR 7294, Équipe EMBIO, Université de Toulon, CS 60584 - 83 041 Toulon Cedex 9, France.
| | - Eliette Ascensio
- Mediterranean Institute of Oceanography (MIO), UMR 7294, Équipe EMBIO, Université de Toulon, CS 60584 - 83 041 Toulon Cedex 9, France
| | - Simone Richard
- Mediterranean Institute of Oceanography (MIO), UMR 7294, Équipe EMBIO, Université de Toulon, CS 60584 - 83 041 Toulon Cedex 9, France
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Xenidis VA, Martsikalis PV, Kotsanopoulos KV, Palaiokostas C, Gkafas GA, Parlapani FF, Boziaris IS, Exadactylos A. The use of telomeric length as authenticity marker in fish and seafood - a new perspective in the detection of adulteration. Crit Rev Food Sci Nutr 2023; 63:12625-12636. [PMID: 35894643 DOI: 10.1080/10408398.2022.2103643] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
In this review we propose the use of telomeric length (TL) as an authenticity marker that could provide an alternative method for differentiating fish and seafood samples or detecting fraud. Considering the ever-growing number of incidents of economically motivated fish and seafood adulteration using even more sophisticated methods to overcome current authenticity markers, the need to identify novel authenticity markers becomes essential. The TL of fish and seafood depends on individual characteristics (e.g., sex, age) and the environmental stimuli (e.g., temperature, water quality) to which these are exposed. Hence, both wild marine and freshwater populations occupying different geographical origin habitats might differ substantially because of the environmental cues affecting them. Moreover, the implementation of various rearing practices in aquaculture, such as different levels of fish and seafood density and increased ambient noise combined with site-specific environmental cues could affect TL, providing regulatory authorities with valuable information by distinguishing wild from reared populations and organic from conventional ones. In the present review the effects of both the environmental conditions and individual characteristics on the telomeric stability of fish and seafood telomeres are discussed, suggesting TL as a potential prospect authenticity marker that could be used to prevent fish and seafood adulteration.
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Affiliation(s)
- Vasileios A Xenidis
- Department of Food Science and Technology, School of Agriculture, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Petros V Martsikalis
- Department of Ichthyology and Aquatic Environment, School of Agricultural Sciences, University of Thessaly, Volos, Greece
| | - Konstantinos V Kotsanopoulos
- Department of Ichthyology and Aquatic Environment, School of Agricultural Sciences, University of Thessaly, Volos, Greece
| | - Christos Palaiokostas
- Department of Animal Breeding and Genetics, Swedish University of Agricultural Sciences, Uppsala, Sweden
| | - Georgios A Gkafas
- Department of Ichthyology and Aquatic Environment, School of Agricultural Sciences, University of Thessaly, Volos, Greece
| | - Foteini F Parlapani
- Department of Ichthyology and Aquatic Environment, School of Agricultural Sciences, University of Thessaly, Volos, Greece
| | - Ioannis S Boziaris
- Department of Ichthyology and Aquatic Environment, School of Agricultural Sciences, University of Thessaly, Volos, Greece
| | - Athanasios Exadactylos
- Department of Ichthyology and Aquatic Environment, School of Agricultural Sciences, University of Thessaly, Volos, Greece
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Sapozhnikova YP, Koroleva AG, Yakhnenko VM, Volkova AA, Avezova TN, Glyzina OY, Sakirko MV, Tolstikova LI, Sukhanova LV. Thermal Preconditioning Alters the Stability of Hump-Snout Whitefish ( Coregonus fluviatilis) and Its Hybrid Form, Showing Potential for Aquaculture. BIOLOGY 2023; 12:1348. [PMID: 37887058 PMCID: PMC10603914 DOI: 10.3390/biology12101348] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2023] [Revised: 10/16/2023] [Accepted: 10/18/2023] [Indexed: 10/28/2023]
Abstract
One of the little-studied ways that climate warming or temperature increases in aquaculture could affect aquatic animals is through accelerated aging. This study is dedicated to understanding the principles of molecular and cellular aging in the target tissues of juvenile whitefishes (Yenisei hump-snout whitefish and its hybrid) under the influence of acute heat stress (up to 26 °C), and the effects of thermal preconditioning as pre-adaptation. Non-adapted stressed hump-snout whitefish showed a higher induction threshold for functionally active mitochondria in the blood and a decrease in telomerase activity in the liver after heat shock exposure as a long-term compensatory response to prevent telomere shortening. However, we observed heat-induced telomere shortening in non-adapted hybrids, which can be explained by a decrease in mitochondrial membrane stability and a gradual increase in energy demand, leading to a decrease in protective telomerase activity. The pre-adapted groups of hump-snout whitefish and hybrids showed a long-term or delayed response of telomerase activity to heat shock, which served as a therapeutic mechanism against telomere shortening. We concluded that the telomerase and telomere responses to thermal stress demonstrate plasticity of tolerance limits and greater stability in hump-snout whitefish compared with hybrids.
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Affiliation(s)
- Yulia P. Sapozhnikova
- Limnological Institute Siberian Branch of the Russian Academy of Sciences, 3 Ulan-Batorskaya, 664033 Irkutsk, Russia; (V.M.Y.); (A.A.V.); (T.N.A.); (O.Y.G.); (M.V.S.); (L.I.T.); (L.V.S.)
| | - Anastasia G. Koroleva
- Limnological Institute Siberian Branch of the Russian Academy of Sciences, 3 Ulan-Batorskaya, 664033 Irkutsk, Russia; (V.M.Y.); (A.A.V.); (T.N.A.); (O.Y.G.); (M.V.S.); (L.I.T.); (L.V.S.)
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McLennan D, Auer SK, McKelvey S, McKelvey L, Anderson G, Boner W, Duprez JS, Metcalfe NB. Habitat restoration weakens negative environmental effects on telomere dynamics. Mol Ecol 2022; 31:6100-6113. [PMID: 33973299 DOI: 10.1111/mec.15980] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2021] [Revised: 04/16/2021] [Accepted: 04/27/2021] [Indexed: 02/01/2023]
Abstract
Habitat quality can have far-reaching effects on organismal fitness, an issue of concern given the current scale of habitat degradation. Many temperate upland streams have reduced nutrient levels due to human activity. Nutrient restoration confers benefits in terms of invertebrate food availability and subsequent fish growth rates. Here we test whether these mitigation measures also affect the rate of cellular ageing of the fish, measured in terms of the telomeres that cap the ends of eukaryotic chromosomes. We equally distributed Atlantic salmon eggs from the same 30 focal families into 10 human-impacted oligotrophic streams in northern Scotland. Nutrient levels in five of the streams were restored by simulating the deposition of a small number of adult Atlantic salmon Salmo salar carcasses at the end of the spawning period, while five reference streams were left as controls. Telomere lengths and expression of the telomerase reverse transcriptase (TERT) gene that may act to lengthen telomeres were then measured in the young fish when 15 months old. While TERT expression was unrelated to any of the measured variables, telomere lengths were shorter in salmon living at higher densities and in areas with a lower availability of the preferred substrate (cobbles and boulders). However, the adverse effects of these habitat features were much reduced in the streams receiving nutrients. These results suggest that adverse environmental pressures are weakened when nutrients are restored, presumably because the resulting increase in food supply reduces levels of both competition and stress.
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Affiliation(s)
- Darryl McLennan
- Institute of Biodiversity, Animal Health and Comparative Medicine, University of Glasgow, Glasgow, UK
| | - Sonya K Auer
- Institute of Biodiversity, Animal Health and Comparative Medicine, University of Glasgow, Glasgow, UK.,Department of Biology, Williams College, Williamstown, MA, USA
| | | | | | - Graeme Anderson
- Institute of Biodiversity, Animal Health and Comparative Medicine, University of Glasgow, Glasgow, UK
| | - Winnie Boner
- Institute of Biodiversity, Animal Health and Comparative Medicine, University of Glasgow, Glasgow, UK
| | - Jessica S Duprez
- Institute of Biodiversity, Animal Health and Comparative Medicine, University of Glasgow, Glasgow, UK
| | - Neil B Metcalfe
- Institute of Biodiversity, Animal Health and Comparative Medicine, University of Glasgow, Glasgow, UK
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6
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Lu H, Ma L, Zhang Y, Feng Y, Zhang J, Wang S. Current Animal Model Systems for Ovarian Aging Research. Aging Dis 2022; 13:1183-1195. [PMID: 35855343 PMCID: PMC9286907 DOI: 10.14336/ad.2021.1209] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2021] [Accepted: 12/07/2021] [Indexed: 11/15/2022] Open
Abstract
Ovarian aging leads to menopause, loss of fertility and other disorders in multiple organs, which brings great distress to women. For ethical reasons, it is impossible to use humans as direct study subjects for aging research. Therefore, biomedical researchers have employed different non-human organisms to study ovarian aging, including worms, fruit flies, fishes, amphibians, birds, mice, rats, cavies, rabbits, pigs, sheep, cows, horses, monkeys, and apes. Because each of these model organisms has its own features, multiple factors, such as size, anatomical structure, cost, ease of operation, fertility, generation time, lifespan, and gene heredity, should be carefully considered when selecting a model system to study ovarian aging. An appropriate model organism would help researchers explore the risk factors and elucidate molecular mechanisms underlying declined ovarian functions, which might be conducive to preventing or delaying the ovarian aging process. This article will offer an overview on several currently available and commonly used model organisms for ovarian aging research by comparing their pros and cons. In doing so, we hope to provide useful information for ovarian aging researchers.
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Affiliation(s)
- Huan Lu
- Department of Obstetrics and Gynecology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, China.
- National Clinical Research Center for Obstetrical and Gynecological Diseases, Wuhan, Hubei 430030, China.
- Key Laboratory of Cancer Invasion and Metastasis, Ministry of Education, Wuhan, Hubei 430030, China.
| | - Lingwei Ma
- Department of Obstetrics and Gynecology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, China.
- National Clinical Research Center for Obstetrical and Gynecological Diseases, Wuhan, Hubei 430030, China.
- Key Laboratory of Cancer Invasion and Metastasis, Ministry of Education, Wuhan, Hubei 430030, China.
| | - Yan Zhang
- Department of Obstetrics and Gynecology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, China.
- National Clinical Research Center for Obstetrical and Gynecological Diseases, Wuhan, Hubei 430030, China.
- Key Laboratory of Cancer Invasion and Metastasis, Ministry of Education, Wuhan, Hubei 430030, China.
| | - Yanzhi Feng
- Department of Obstetrics and Gynecology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, China.
- National Clinical Research Center for Obstetrical and Gynecological Diseases, Wuhan, Hubei 430030, China.
- Key Laboratory of Cancer Invasion and Metastasis, Ministry of Education, Wuhan, Hubei 430030, China.
| | - Jinjin Zhang
- Department of Obstetrics and Gynecology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, China.
- National Clinical Research Center for Obstetrical and Gynecological Diseases, Wuhan, Hubei 430030, China.
- Key Laboratory of Cancer Invasion and Metastasis, Ministry of Education, Wuhan, Hubei 430030, China.
- Correspondence should be addressed to: Dr. Shixuan Wang () and Dr. Jinjin Zhang (), Department of Obstetrics and Gynecology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology; Wuhan, Hubei, China
| | - Shixuan Wang
- Department of Obstetrics and Gynecology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, China.
- National Clinical Research Center for Obstetrical and Gynecological Diseases, Wuhan, Hubei 430030, China.
- Key Laboratory of Cancer Invasion and Metastasis, Ministry of Education, Wuhan, Hubei 430030, China.
- Correspondence should be addressed to: Dr. Shixuan Wang () and Dr. Jinjin Zhang (), Department of Obstetrics and Gynecology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology; Wuhan, Hubei, China
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Sex Associated Effects of Noise Pollution in Stone Sculpin ( Paracottus knerii) as a Model Object in the Context of Human-Induced Rapid Environmental Change. BIOLOGY 2021; 10:biology10101063. [PMID: 34681163 PMCID: PMC8533501 DOI: 10.3390/biology10101063] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/03/2021] [Revised: 10/06/2021] [Accepted: 10/15/2021] [Indexed: 12/12/2022]
Abstract
Simple Summary In this comprehensive multidisciplinary study, we applied a novel multilevel approach to stone sculpins Paracottus knerii Dybowski, 1874, as model organisms and test for the first time the hypothesis of sex-dependent differences in response to long-term noise exposure in fish. The results testify that the stone sculpin females appeared to experience excessive stress, while the males showed adaptive recalibrations. These effects may be explained by a unique adaptive strategy of offspring care in the stone sculpin males and their biological role in reproductive behavior within the species. The findings obtained may help to elucidate the links between noise exposure in the context of human-induced rapid environmental change (HIREC), long-term sex-related changes in fishes, and the possible further evolutionary success of a species. Such HIREC modeling not only provides information about the potential consequences under anthropogenic pressure but also can help identify the natural mechanisms of stress resistance in different species, including those related to sex, and also contribute to the development of effective environmental management practices. Abstract This work simulates the consequences of HIREC using stone sculpins as model organisms. Sex-dependent effects of long-term noise exposure at mean sound pressure levels of 160–179 dB re 1 μPa (SPLpk–pk) were measured. We applied a multilevel approach to testing the stress response: a comparative analysis of the macula sacculi and an assessment of hematological and molecular stress responses. Noise exposure resulted in hair cell loss, changes in some cytometric parameters in blood, and an increase in the number of functionally active mitochondria in the red blood cells of males and its decrease in females, demonstrating a mitochondrial allostatic load and depletion of functional reserve. Finally, a statistically significant decrease in the telomerase activity of the auditory epithelium and a shortening of telomere length in the brain as molecular markers of stress were observed after noise exposure only in females. No significant decrease in telomerase activity and shortening of telomere length in nerve target tissues were observed in stressed males. However, we recorded an increase in the telomerase activity in male gonads. This sex-dependent difference in load may be associated with accelerated cellular aging in females and lower stress-related long-term risk in males. In this article, we discuss possible reasons for these noise-induced stress effects.
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Badmus KA, Idrus Z, Meng GY, Sazili AQ, Mamat-Hamidi K. Telomere Length and Regulatory Genes as Novel Stress Biomarkers and Their Diversities in Broiler Chickens ( Gallus gallus domesticus) Subjected to Corticosterone Feeding. Animals (Basel) 2021; 11:ani11102759. [PMID: 34679783 PMCID: PMC8532957 DOI: 10.3390/ani11102759] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2021] [Revised: 08/16/2021] [Accepted: 08/23/2021] [Indexed: 12/15/2022] Open
Abstract
Simple Summary Assessment of poultry welfare is very crucial for sustainable production in the tropics. There is a demand for alternatives to plasma corticosterone levels as they have received much criticism as an unsuitable predictor of animal welfare due to inconsistency. In this study, we noticed no effect of age on plasma corticosterone (CORT) although it was altered by CORT treatment. However, growth performances and organ weight were affected by CORT treatment and age. The broad sense evaluation of telomere length in this study revealed that telomere length in the blood, muscle, liver and heart was shortened by chronic stress induced by corticosterone administration. The expression profile of the telomere regulatory genes was altered by chronic stress. This study informed us of the potential of telomere length and its regulatory genes in the assessment of animal welfare in the poultry sector for sustainable production. Abstract This study was designed to characterize telomere length and its regulatory genes and to evaluate their potential as well-being biomarkers. Chickens were fed a diet containing corticosterone (CORT) for 4 weeks and performances, organ weight, plasma CORT levels, telomere lengths and regulatory genes were measured and recorded. Body weights of CORT-fed chickens were significantly suppressed (p < 0.05), and organ weights and circulating CORT plasma levels (p < 0.05) were altered. Interaction effect of CORT and duration was significant (p < 0.05) on heart and liver telomere length. CORT significantly (p < 0.05) shortened the telomere length of the whole blood, muscle, liver and heart. The TRF1, chTERT, TELO2 and HSF1 were significantly (p < 0.05) upregulated in the liver and heart at week 4 although these genes and TERRA were downregulated in the muscles at weeks 2 and 4. Therefore, telomere lengths and their regulators are associated and diverse, so they can be used as novel biomarkers of stress in broiler chickens fed with CORT.
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Affiliation(s)
- Kazeem Ajasa Badmus
- Department of Animal Science, Universiti Putra Malaysia, Seri Kembangan 43400, Selangor, Malaysia; (K.A.B.); (Z.I.); (A.Q.S.)
- Institute of Tropical Agriculture and Food Security, Universiti Putra Malaysia, Seri Kembangan 43400, Selangor, Malaysia;
| | - Zulkifli Idrus
- Department of Animal Science, Universiti Putra Malaysia, Seri Kembangan 43400, Selangor, Malaysia; (K.A.B.); (Z.I.); (A.Q.S.)
- Institute of Tropical Agriculture and Food Security, Universiti Putra Malaysia, Seri Kembangan 43400, Selangor, Malaysia;
| | - Goh Yong Meng
- Institute of Tropical Agriculture and Food Security, Universiti Putra Malaysia, Seri Kembangan 43400, Selangor, Malaysia;
- Department of Veterinary Pre-Clinical Science, Universiti Putra Malaysia, Seri Kembangan 43400, Selangor, Malaysia
| | - Awis Qurni Sazili
- Department of Animal Science, Universiti Putra Malaysia, Seri Kembangan 43400, Selangor, Malaysia; (K.A.B.); (Z.I.); (A.Q.S.)
- Institute of Tropical Agriculture and Food Security, Universiti Putra Malaysia, Seri Kembangan 43400, Selangor, Malaysia;
| | - Kamalludin Mamat-Hamidi
- Department of Animal Science, Universiti Putra Malaysia, Seri Kembangan 43400, Selangor, Malaysia; (K.A.B.); (Z.I.); (A.Q.S.)
- Institute of Tropical Agriculture and Food Security, Universiti Putra Malaysia, Seri Kembangan 43400, Selangor, Malaysia;
- Correspondence:
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Akcha F, Cahuc C, Rouxel J, Munschy C, Aminot Y, Chouvelon T, Mahe K, Budzinski H, Mauffret A. Development in the European flounder (Platichthys flesus) of a q-PCR assay for the measurement of telomere length, a potential biomarker of pollutant effects for biomonitoring studies. MARINE POLLUTION BULLETIN 2021; 170:112610. [PMID: 34146858 DOI: 10.1016/j.marpolbul.2021.112610] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/05/2021] [Revised: 06/02/2021] [Accepted: 06/03/2021] [Indexed: 06/12/2023]
Abstract
Telomeres protect the coding sequence of chromosome ends and Telomere Length (TL) has been proposed as a biomarker of cellular aging, cumulative stress exposure and life-span in humans. With the aim to propose new biomarkers, a q-PCR protocol was adapted for the measurement of TL in the European flounder Platichthys flesus. The protocol was then applied in 2-year-old flounders from the Seine Estuary. The absolute TL in the flounder is 54 ± 13 kbp per genome (mean ± standard error). Considering relative or absolute TL, no correlation was observed with DNA damage and any of the measured contaminant concentrations (trace elements, metabolites of polycyclic aromatic hydrocarbons, polychlorobiphenyls, organochlorinated pesticides, polybrominated diphenyl ethers, perfluoroalkyl substances). Because sampling was limited, further investigations are required to state a possible impact of chemical pollution on flatfish telomeres. This is motivated by correlations observed with organochlorinated compounds when decreasing statistical significance (p ≤ 0.10).
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Affiliation(s)
- F Akcha
- Ifremer, Biogeochemistry and Ecotoxicology Research Unit, Nantes, France.
| | - C Cahuc
- Ifremer, Biogeochemistry and Ecotoxicology Research Unit, Nantes, France
| | - J Rouxel
- Ifremer, Biogeochemistry and Ecotoxicology Research Unit, Nantes, France
| | - C Munschy
- Ifremer, Biogeochemistry and Ecotoxicology Research Unit, Nantes, France
| | - Y Aminot
- Ifremer, Biogeochemistry and Ecotoxicology Research Unit, Nantes, France
| | - T Chouvelon
- Ifremer, Biogeochemistry and Ecotoxicology Research Unit, Nantes, France
| | - K Mahe
- Ifremer, Laboratory of Fisheries Resources, Boulogne-Sur-Mer, France
| | - H Budzinski
- UMR CNRS 5805 EPOC, Laboratory of Physico- and Toxico-Chemistry of the Environment, Bordeaux, France
| | - A Mauffret
- Ifremer, Biogeochemistry and Ecotoxicology Research Unit, Nantes, France
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10
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Stabilization of telomere by the antioxidant property of polyphenols: Anti-aging potential. Life Sci 2020; 259:118341. [PMID: 32853653 DOI: 10.1016/j.lfs.2020.118341] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2020] [Revised: 08/19/2020] [Accepted: 08/22/2020] [Indexed: 12/28/2022]
Abstract
Aging is a form of a gradual loss of physiological integrity that results in impaired cellular function and ultimately increased vulnerability to disease and death. This process is a significant risk factor for critical age-related disorders such as cancer, diabetes, cardiovascular disease, and neurological conditions. Several mechanisms contribute to aging, most notably progressive telomeres shortening, which can be counteracted by telomerase enzyme activity and increasing in this enzyme activity associated with partly delaying the onset of aging. Individual behaviors and environmental factors such as nutrition affect the life-span by impact the telomerase activity rate. Healthy eating habits, including antioxidant intakes, such as polyphenols, can have a positive effect on telomere length by this mechanism. In this review, after studying the underlying mechanisms of aging and understanding the relationships between telomeres, telomerase, and aging, it has been attempted to explain the effect of polyphenols on reversing the oxidative stress and aging process.
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Sapozhnikova YP, Koroleva AG, Yakhnenko VM, Tyagun ML, Glyzina OY, Coffin AB, Makarov MM, Shagun AN, Kulikov VA, Gasarov PV, Kirilchik SV, Klimenkov IV, Sudakov NP, Anoshko PN, Kurashova NA, Sukhanova LV. Molecular and cellular responses to long-term sound exposure in peled (Coregonus peled). THE JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA 2020; 148:895. [PMID: 32873010 DOI: 10.1121/10.0001674] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/01/2020] [Accepted: 07/08/2020] [Indexed: 06/11/2023]
Abstract
This research examined the impacts of acoustic stress in peled (Coregonus peled Gmelin, 1788), a species commonly cultivated in Russia. This study presents a comparative analysis of the macula sacculi and otoliths, as well as primary hematological and secondary telomere stress responses, in control and sound-exposed peled. The authors measured the effects of long-term (up to 18 days) exposure to a 300 Hz tone at mean sound pressure levels of 176-186 dB re 1 μPa (SPLpk-pk); the frequency and intensity were selected to approximate loud acoustic environments associated with cleaning equipment in aquaculture settings. Acoustic exposure resulted in ultrastructure changes to otoliths, morphological damage to sensory hair cells of the macula sacculi, and a gradual decrease in the number of functionally active mitochondria in the red blood cells but no changes to telomeres. Changes were apparent following at least ten days of acoustic exposure. These data suggest that acoustic exposure found in some aquaculture settings could cause stress responses and auditory damage to peled and, potentially, other commercially important species. Reducing sound levels in fish rearing facilities could contribute to the formation of effective aquaculture practices that mitigate noise-induced stress in fishes.
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Affiliation(s)
- Yulia P Sapozhnikova
- Laboratory of Ichthyology, Limnological Institute Siberian Branch of the Russian Academy of Sciences, 3 Ulan-Batorskaya, Irkutsk 664033, Russia
| | - Anastasia G Koroleva
- Laboratory of Ichthyology, Limnological Institute Siberian Branch of the Russian Academy of Sciences, 3 Ulan-Batorskaya, Irkutsk 664033, Russia
| | - Vera M Yakhnenko
- Laboratory of Ichthyology, Limnological Institute Siberian Branch of the Russian Academy of Sciences, 3 Ulan-Batorskaya, Irkutsk 664033, Russia
| | - Marina L Tyagun
- Laboratory of Ichthyology, Limnological Institute Siberian Branch of the Russian Academy of Sciences, 3 Ulan-Batorskaya, Irkutsk 664033, Russia
| | - Olga Yu Glyzina
- Experimental Hydrobiology Group, Limnological Institute Siberian Branch of the Russian Academy of Sciences, 3 Ulan-Batorskaya, Irkutsk 664033, Russia
| | - Allison B Coffin
- Department of Integrative Physiology and Neuroscience, Washington State University Vancouver, 14204 Northeast Salmon Creek Avenue, Vancouver, Washington 98686, USA
| | - Mikhail M Makarov
- Laboratory of Interdisciplinary Environmental and Economic Research and Technology, Limnological Institute Siberian Branch of the Russian Academy of Sciences, 3 Ulan-Batorskaya, Irkutsk 664033, Russia
| | - Artem N Shagun
- Laboratory of General and Engineering Seismology and Seismogeology, Institute of the Earth's Crust Siberian Branch of the Russian Academy of Sciences, 128 Lermontova Street, Irkutsk 664033, Russia
| | - Viktor A Kulikov
- Center for Computational and Data-Intensive Science and Engineering, Skolkovo Institute of Science and Technology, 1 Nobel Street, Moscow 143026, Russia
| | - Polikarp V Gasarov
- Department of Plant Physiology, Cell Biology, and Genetics, Irkutsk State University, 1 K. Marksa Street, Irkutsk 664003, Russia
| | - Sergey V Kirilchik
- Laboratory of Ichthyology, Limnological Institute Siberian Branch of the Russian Academy of Sciences, 3 Ulan-Batorskaya, Irkutsk 664033, Russia
| | - Igor V Klimenkov
- Department of Cell Ultrastructure, Limnological Institute Siberian Branch of the Russian Academy of Sciences, 3 Ulan-Batorskaya, Irkutsk 664033, Russia
| | - Nikolay P Sudakov
- Department of Cell Ultrastructure, Limnological Institute Siberian Branch of the Russian Academy of Sciences, 3 Ulan-Batorskaya, Irkutsk 664033, Russia
| | - Pavel N Anoshko
- Laboratory of Interdisciplinary Environmental and Economic Research and Technology, Limnological Institute Siberian Branch of the Russian Academy of Sciences, 3 Ulan-Batorskaya, Irkutsk 664033, Russia
| | - Nadezhda A Kurashova
- Scientific Center of Family Health Problems and Human Reproduction, Irkutsk 664003, Russia
| | - Lyubov V Sukhanova
- Laboratory of Ichthyology, Limnological Institute Siberian Branch of the Russian Academy of Sciences, 3 Ulan-Batorskaya, Irkutsk 664033, Russia
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Louzon M, Coeurdassier M, Gimbert F, Pauget B, de Vaufleury A. Telomere dynamic in humans and animals: Review and perspectives in environmental toxicology. ENVIRONMENT INTERNATIONAL 2019; 131:105025. [PMID: 31352262 DOI: 10.1016/j.envint.2019.105025] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2019] [Revised: 06/19/2019] [Accepted: 07/15/2019] [Indexed: 06/10/2023]
Abstract
Telomeres (TLs) play major roles in stabilizing the genome and are usually shortened with ageing. The maintenance of TLs is ensured by two mechanisms involving telomerase (TA) enzyme and alternative lengthening telomeres (ALT). TL shortening and/or TA inhibition have been related to health effects on organisms (leading to reduced reproductive lifespan and survival), suggesting that they could be key processes in toxicity mechanisms (at molecular and cellular levels) and relevant as an early warning of exposure and effect of chemicals on human health and animal population dynamics. Consequently, a critical analysis of knowledge about relationships between TL dynamic and environmental pollution is essential to highlight the relevance of TL measurement in environmental toxicology. The first objective of this review is to provide a survey on the basic knowledge about TL structure, roles, maintenance mechanisms and causes of shortening in both vertebrates (including humans) and invertebrates. Overall, TL length decreases with ageing but some unexpected exceptions are reported (e.g., in species with different lifespans, such as the nematode Caenorhabditis elegans or the crustacean Homarus americanus). Inconsistent results reported in various biological groups or even between species of the same genus (e.g., the microcrustacean Daphnia sp.) indicate that the relation usually proposed between TL shortening and a decrease in TA activity cannot be generalized and depends on the species, stage of development or lifespan. Although the scientific literature provides evidence of the effect of ageing on TL shortening, much less information on the relationships between shortening, maintenance of TLs, influence of other endogenous and environmental drivers, including exposure to chemical pollutants, is available, especially in invertebrates. The second objective of this review is to connect knowledge on TL dynamic and exposure to contaminants. Most of the studies published on humans rely on correlative epidemiological approaches and few in vitro experiments. They have shown TL attrition when exposed to contaminants, such as polycyclic aromatic hydrocarbons (PAH), polychlorinated biphenyls (PCB), pesticides and metallic elements (ME). In other vertebrates, the studies we found deals mainly with birds and, overall, report a disturbance of TL dynamic consecutively to exposure to chemicals, including metals and organic compounds. In invertebrates, no data are available and the potential of TL dynamic in environmental risk assessment remains to be explored. On the basis of the main gaps identified some research perspectives (e.g., impact of endogenous and environmental drivers, dose response effects, link between TL length, TA activity, longevity and ageing) are proposed to better understand the potential of TL and TA measurements in humans and animals in environmental toxicology.
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Affiliation(s)
- Maxime Louzon
- Department Chrono-Environnement, UMR UFC/CNRS 6249 USC INRA University of Bourgogne Franche-Comté, 16 route de Gray, 25000 Besançon, France
| | - Michael Coeurdassier
- Department Chrono-Environnement, UMR UFC/CNRS 6249 USC INRA University of Bourgogne Franche-Comté, 16 route de Gray, 25000 Besançon, France
| | - Frédéric Gimbert
- Department Chrono-Environnement, UMR UFC/CNRS 6249 USC INRA University of Bourgogne Franche-Comté, 16 route de Gray, 25000 Besançon, France
| | - Benjamin Pauget
- TESORA, Le Visium, 22 avenue Aristide Briand, 94110 Arcueil, France
| | - Annette de Vaufleury
- Department Chrono-Environnement, UMR UFC/CNRS 6249 USC INRA University of Bourgogne Franche-Comté, 16 route de Gray, 25000 Besançon, France.
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Saghebjoo M, Sadeghi-Tabas S, Saffari I, Ghane A, Dimauro I. Sex Differences in antiaging response to short- and long-term high-intensity interval exercise in rat cardiac muscle: Telomerase activity, total antioxidant/oxidant status. CHINESE J PHYSIOL 2019; 62:261-266. [DOI: 10.4103/cjp.cjp_52_19] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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Tonoyama Y, Shinya M, Toyoda A, Kitano T, Oga A, Nishimaki T, Katsumura T, Oota H, Wan MT, Yip BWP, Helen MOL, Chisada S, Deguchi T, Au DWT, Naruse K, Kamei Y, Taniguchi Y. Abnormal nuclear morphology is independent of longevity in a zmpste24-deficient fish model of Hutchinson-Gilford progeria syndrome (HGPS). Comp Biochem Physiol C Toxicol Pharmacol 2018; 209:54-62. [PMID: 29567411 DOI: 10.1016/j.cbpc.2018.03.006] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/11/2017] [Revised: 03/11/2018] [Accepted: 03/16/2018] [Indexed: 12/21/2022]
Abstract
Lamin is an intermediate protein underlying the nuclear envelope and it plays a key role in maintaining the integrity of the nucleus. A defect in the processing of its precursor by a metalloprotease, ZMPSTE24, results in the accumulation of farnesylated prelamin in the nucleus and causes various diseases, including Hutchinson-Gilford progeria syndrome (HGPS). However, the role of lamin processing is unclear in fish species. Here, we generated zmpste24-deficient medaka and evaluated their phenotype. Unlike humans and mice, homozygous mutants did not show growth defects or lifespan shortening, despite lamin precursor accumulation. Gonadosomatic indices, blood glucose levels, and regenerative capacity of fins were similar in 1-year-old mutants and their wild-type (WT) siblings. Histological examination showed that the muscles, subcutaneous fat tissues, and gonads were normal in the mutants at the age of 1 year. However, the mutants showed hypersensitivity to X-ray irradiation, although p53target genes, p21 and mdm2, were induced 6 h after irradiation. Immunostaining of primary cultured cells from caudal fins and visualization of nuclei using H2B-GFP fusion proteins revealed an abnormal nuclear shape in the mutants both in vitro and in vivo. The telomere lengths were significantly shorter in the mutants compared to WT. Taken together, these results suggest that zmpste24-deficient medaka phenocopied HGPS only partially and that abnormal nuclear morphology and lifespan shortening are two independent events in vertebrates.
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Affiliation(s)
- Yasuhiro Tonoyama
- Branch Laboratory of Gene Medicine, School of Medicine, Keio University, 2 Okubo, Tsukuba, Ibaraki 300-2611, Japan
| | - Minori Shinya
- Department of Biology, Keio University, 4-1-1 Hiyoshi, Kohoku-ku, Yokohama, Kanagawa 223-8521, Japan
| | - Atsushi Toyoda
- Center for Information Biology, National Institute of Genetics, Yata 1111, Mishima, Shizuoka 411-8540, Japan
| | - Takeshi Kitano
- Department of Biological Sciences, Graduate School of Science and Technology, Kumamoto University, 2-39-1 Kurokami, Chuo-ku, Kumamoto 860-8555, Japan
| | - Atsunori Oga
- Department of Pathology, Yamaguchi University Graduate School of Medicine, 1-1-1 Minamikogushi, Ube, Yamaguchi 755-8505, Japan
| | - Toshiyuki Nishimaki
- Department of Anatomy, Kitasato University School of Medicine, Sagamihara, Kanagawa 252-0674, Japan
| | - Takafumi Katsumura
- Department of Anatomy, Kitasato University School of Medicine, Sagamihara, Kanagawa 252-0674, Japan
| | - Hiroki Oota
- Department of Anatomy, Kitasato University School of Medicine, Sagamihara, Kanagawa 252-0674, Japan
| | - Miles T Wan
- State Key Laboratory in Marine Pollution, Department of Chemistry, City University of, Hong Kong, China
| | - Bill W P Yip
- State Key Laboratory in Marine Pollution, Department of Chemistry, City University of, Hong Kong, China
| | - Mok O L Helen
- State Key Laboratory in Marine Pollution, Department of Chemistry, City University of, Hong Kong, China
| | - Shinichi Chisada
- Department of Preventive Medicine and Public Health, Kyorin University, School of Medicine, Tokyo 181-8611, Japan
| | - Tomonori Deguchi
- Advanced Genome Design Research Group, Biomedical Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Midorigaoka 1-8-31, Ikeda, Osaka, 563-8577, Japan
| | - Doris W T Au
- State Key Laboratory in Marine Pollution, Department of Chemistry, City University of, Hong Kong, China
| | - Kiyoshi Naruse
- Laboratory of Bioresources, National Institute for Basic Biology, National Institutes of Natural Sciences, Okazaki, Aichi 444-8585, Japan
| | - Yasuhiro Kamei
- Spectrography and Bioimaging Facility, National Institute for Basic Biology, National Institutes of Natural Sciences, Okazaki, Aichi 444-8585, Japan
| | - Yoshihito Taniguchi
- Department of Preventive Medicine and Public Health, Kyorin University, School of Medicine, Tokyo 181-8611, Japan.
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McLennan D, Armstrong JD, Stewart DC, Mckelvey S, Boner W, Monaghan P, Metcalfe NB. Telomere elongation during early development is independent of environmental temperatures in Atlantic salmon. ACTA ACUST UNITED AC 2018; 221:jeb.178616. [PMID: 29636409 PMCID: PMC6031317 DOI: 10.1242/jeb.178616] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2018] [Accepted: 03/29/2018] [Indexed: 12/31/2022]
Abstract
There is increasing evidence from endothermic vertebrates that telomeres, which cap the ends of chromosomes and play an important role in chromosome protection, decline in length during postnatal life and are a useful indicator of physiological state and expected lifespan. However, much less is currently known about telomere dynamics in ectothermic vertebrates, which are likely to differ from that of endotherms, at least in part due to the sensitivity of ectotherm physiology to environmental temperature. We report here on an experiment in which Atlantic salmon (Salmo salar) were reared through the embryonic and larval stages of development, and under differing temperatures, in order to examine the effects of environmental temperature during early life on telomere dynamics, oxidative DNA damage and cellular proliferation. Telomere length significantly increased between the embryonic and larval stages of development. Contrary to our expectations, variation in telomere length at the end of the larval stage was unrelated to either cell proliferation rate or the relative level of oxidative DNA damage, and did not vary between the temperature treatments. This study suggests that salmon are able to restore the length of their telomeres during early development, which may possibly help to buffer potentially harmful environmental effects experienced in early life. Summary: The authors show that, in salmon, telomeres significantly lengthen between the embryonic and larval stages of development, and that this is not influenced by environmental temperature.
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Affiliation(s)
- Darryl McLennan
- Institute of Biodiversity, Animal Health and Comparative Medicine, Graham Kerr Building, University of Glasgow, Glasgow, G12 8QQ, UK
| | - John D Armstrong
- Marine Scotland-Science, Freshwater Laboratory, Faskally, Pitlochry, PH16 5LB, UK
| | - David C Stewart
- Marine Scotland-Science, Freshwater Laboratory, Faskally, Pitlochry, PH16 5LB, UK
| | - Simon Mckelvey
- Cromarty Firth Fishery Trust, CKD Galbraith, Reay House, 17 Old Edinburgh Road, Inverness, IV2 3HF
| | - Winnie Boner
- Institute of Biodiversity, Animal Health and Comparative Medicine, Graham Kerr Building, University of Glasgow, Glasgow, G12 8QQ, UK
| | - Pat Monaghan
- Institute of Biodiversity, Animal Health and Comparative Medicine, Graham Kerr Building, University of Glasgow, Glasgow, G12 8QQ, UK
| | - Neil B Metcalfe
- Institute of Biodiversity, Animal Health and Comparative Medicine, Graham Kerr Building, University of Glasgow, Glasgow, G12 8QQ, UK
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Siebert C, dos Santos TM, Bertó CG, Parisi MM, Coelho RP, Manfredini V, Barbé-Tuana FM, Wyse ATS. Vitamin D Supplementation Reverses DNA Damage and Telomeres Shortening Caused by Ovariectomy in Hippocampus of Wistar Rats. Neurotox Res 2018; 34:538-546. [DOI: 10.1007/s12640-018-9909-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2017] [Revised: 04/25/2018] [Accepted: 04/25/2018] [Indexed: 12/15/2022]
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17
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McLennan D, Armstrong JD, Stewart DC, McKelvey S, Boner W, Monaghan P, Metcalfe NB. Links between parental life histories of wild salmon and the telomere lengths of their offspring. Mol Ecol 2018; 27:804-814. [DOI: 10.1111/mec.14467] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2017] [Revised: 11/13/2017] [Accepted: 11/29/2017] [Indexed: 01/02/2023]
Affiliation(s)
- Darryl McLennan
- Institute of Biodiversity; Animal Health and Comparative Medicine; University of Glasgow; Glasgow UK
| | | | | | - Simon McKelvey
- Cromarty Firth Fishery Trust; CKD Galbraith; Inverness UK
| | - Winnie Boner
- Institute of Biodiversity; Animal Health and Comparative Medicine; University of Glasgow; Glasgow UK
| | - Pat Monaghan
- Institute of Biodiversity; Animal Health and Comparative Medicine; University of Glasgow; Glasgow UK
| | - Neil B. Metcalfe
- Institute of Biodiversity; Animal Health and Comparative Medicine; University of Glasgow; Glasgow UK
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