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Михеев РК, Андреева ЕН, Григорян ОР, Шереметьева ЕВ, Абсатарова ЮС, Одарченко АС, Оплетаева ОН. [Molecular and cellular mechanisms of ageing: modern knowledge (literature review)]. PROBLEMY ENDOKRINOLOGII 2023; 69:45-54. [PMID: 37968951 PMCID: PMC10680502 DOI: 10.14341/probl13278] [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: 03/09/2023] [Revised: 05/05/2023] [Accepted: 05/15/2023] [Indexed: 11/17/2023]
Abstract
Ageing (as known as eldering, senescence) is a genetically and epigenetically programmed pathophysiological process. Velocity of biological ageing is defined as balance between alteration and reparation of body structures. According to last World Health Organization (WHO) highlights ageing still stays an extremely actual scientific, social and demographic problem: in 2020 total number of people older than 60 years and older was 1 billion people; in 2030 future number may be 1,4 billion people, in 2050 - 2,1 billion people. Absence of single universal theory of aging nowadays is reason for scientifical and clinical collaboration between biologists and doctors, including endocrinologists. Designing of potentially effective newest anti-ageing strategies (such as natural/synthetic telomerase regulators, mesenchymal stem cells etc.) is of interest to scientific community. The aim of present article is a review of modern omics (genomic, proteomic, metabolomic) ageing mechanisms, potential ways of targeted prevention and treatment of age-related disease according to conception of personalized medicine. Present review is narrative, it does not lead to systematic review, meta-analysis and does not aim to commercial advertisement. Review has been provided via PubMed article that have been published since 1979 until 2022.
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Affiliation(s)
- Р. К. Михеев
- Национальный медицинский исследовательский центр эндокринологии
| | - Е. Н. Андреева
- Национальный медицинский исследовательский центр эндокринологии; Московский государственный медико-стоматологический университет им. А.И. Евдокимова
| | - О. Р. Григорян
- Национальный медицинский исследовательский центр эндокринологии
| | | | | | - А. С. Одарченко
- Национальный медицинский исследовательский центр эндокринологии
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Devrajani T, Abid S, Shaikh H, Shaikh I, Devrajani DB, Memon SM, Waryah AM, Ujjan ID, Syed BM. Relationship between aging and control of metabolic syndrome with telomere shortening: a cross-sectional study. Sci Rep 2023; 13:17878. [PMID: 37857729 PMCID: PMC10587132 DOI: 10.1038/s41598-023-44715-1] [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] [Received: 05/05/2023] [Accepted: 10/11/2023] [Indexed: 10/21/2023] Open
Abstract
Aging is considered one of the major risk factors for several human disorders. The telomere plays a crucial role in regulating cellular responsiveness to stress and growth stimuli as well as maintaining the integrity of the Deoxyribonucleic Acid (DNA), and aging leads to the progressive decline in the telomere length (TL) due to continuous cell division. The aim of this study was to determine the relationship between TL and advancing age and the impact of metabolic syndrome (MetS) on TL. Firstly, we determined the association of advancing age and TL, by measuring telomere length (T/S ratio) in healthy volunteers (n = 90). The TL was compared between normal population and patients with metabolic syndrome (n = 298). The age matched controlled and uncontrolled MetS patients (n = 149) were also compared for their TL T/S ratio. The TL showed negative correlation with advancing age, whereas the significant change was observed at the cut-offs of 40 and 70 years defining 40 with longer TL and 70 as shorter TL. The longest T/S ratio at 2.46 was measured at the age range of 1 year in healthy volunteers, while elderly population showed considerably shorter TL. The patients older than 60 years with poor or uncontrolled MetS had shorter TL, as compared to the controlled MetS. In conclusion our findings suggest that TL was negatively correlated with advancing age. Uncontrolled metabolic syndrome appeared to have worsening effects on TL. Telomere length appears to have potential to be used a parameter to determine age. However, further large scale studies are recommended to make firm guidelines.
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Affiliation(s)
- Tarachand Devrajani
- Clinical Research Division, Medical Research Center, Liaquat University of Medical and Health Sciences, Jamshoro, Pakistan
- Department of Medicine, Liaquat University of Medical and Health Sciences, Jamshoro, Pakistan
| | - Shariq Abid
- Clinical Research Division, Medical Research Center, Liaquat University of Medical and Health Sciences, Jamshoro, Pakistan
| | - Hina Shaikh
- Department of Molecular Biology and Genetics, Medical Research Center, Liaquat University of Medical and Health Sciences, Jamshoro, Pakistan
| | - Iram Shaikh
- Department of Molecular Biology and Genetics, Medical Research Center, Liaquat University of Medical and Health Sciences, Jamshoro, Pakistan
| | - Durshana Bai Devrajani
- Department of Molecular Biology and Genetics, Medical Research Center, Liaquat University of Medical and Health Sciences, Jamshoro, Pakistan
| | - Sikander Munir Memon
- Clinical Research Division, Medical Research Center, Liaquat University of Medical and Health Sciences, Jamshoro, Pakistan
| | - Ali Muhammad Waryah
- Department of Molecular Biology and Genetics, Medical Research Center, Liaquat University of Medical and Health Sciences, Jamshoro, Pakistan
| | - Ikram Din Ujjan
- Department of Pathology, Liaquat University of Medical and Health Sciences, Jamshoro, Pakistan
| | - Binafsha Manzoor Syed
- Clinical Research Division, Medical Research Center, Liaquat University of Medical and Health Sciences, Jamshoro, Pakistan.
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Effects of Genistein on Common Kidney Diseases. Nutrients 2022; 14:nu14183768. [PMID: 36145144 PMCID: PMC9506319 DOI: 10.3390/nu14183768] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2022] [Revised: 09/06/2022] [Accepted: 09/06/2022] [Indexed: 12/16/2022] Open
Abstract
Genistein is a naturally occurring phytoestrogen (soy or soybean products) that is classified as an isoflavone, and its structure is similar to that of endogenous estrogens; therefore, genistein can exert an estrogen-like effect via estrogen receptors. Additionally, genistein is a tyrosine kinase inhibitor, which enables it to block abnormal cell growth and proliferation signals through the inhibition of tyrosine kinase. Genistein is also an angiogenesis inhibitor and an antioxidant. Genistein has effects on kidney cells, some of the kidney’s physiological functions, and a variety of kidney diseases. First, genistein exerts a protective effect on normal cells by reducing the inflammatory response, inhibiting apoptosis, inhibiting oxidative stress, inhibiting remodeling, etc., but after cell injury, the protective effect of genistein decreases or even has the opposite effect. Second, genistein can regulate renin intake to maintain blood pressure balance, regulate calcium uptake to regulate Ca2+ and Pi balances, and reduce vasodilation to promote diuresis. Third, genistein has beneficial effects on a variety of kidney diseases (including acute kidney disease, kidney cancer, and different chronic kidney diseases), such as reducing symptoms, delaying disease progression, and improving prognosis. Therefore, this paper reviews animal and human studies on the protective effects of genistein on the kidney in vivo and in vitro to provide a reference for clinical research in the future.
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Wen Y, Liu Y, Huang Q, Farag MA, Li X, Wan X, Zhao C. Nutritional assessment models for diabetes and aging. FOOD FRONTIERS 2022. [DOI: 10.1002/fft2.168] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Affiliation(s)
- Yuxi Wen
- College of Marine Sciences Fujian Agriculture and Forestry University Fuzhou China
- College of Food Science Fujian Agriculture and Forestry University Fuzhou China
| | - Yuanyuan Liu
- College of Food Science Fujian Agriculture and Forestry University Fuzhou China
| | - Qihui Huang
- College of Marine Sciences Fujian Agriculture and Forestry University Fuzhou China
- Department of Analytical and Food Chemistry Universidade de Vigo, Nutrition and Bromatology Group, Faculty of Sciences Ourense Spain
| | - Mohamed A. Farag
- Pharmacognosy Department, College of Pharmacy Cairo University Cairo Egypt
| | - Xiaoqing Li
- School of Food Science and Engineering South China University of Technology Guangzhou China
| | - Xuzhi Wan
- College of Biosystem Engineering and Food Science Zhejiang University Hangzhou China
| | - Chao Zhao
- College of Marine Sciences Fujian Agriculture and Forestry University Fuzhou China
- College of Food Science Fujian Agriculture and Forestry University Fuzhou China
- Key Laboratory of Marine Biotechnology of Fujian Province, Institute of Oceanology Fujian Agriculture and Forestry University Fuzhou China
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Liu T, Bowen RL, Wilson AC, Atwood CS. Estropause, Sex Hormones and Metal Homeostasis in the Mouse Brain. Front Neurol 2022; 13:841822. [PMID: 35645980 PMCID: PMC9130555 DOI: 10.3389/fneur.2022.841822] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2021] [Accepted: 02/07/2022] [Indexed: 12/02/2022] Open
Abstract
Alterations in brain metal ion homeostasis have been reported with aging and are implicated in the pathogenesis of neurodegenerative diseases. To assess whether age-related changes in hypothalamic-pituitary-gonadal (HPG) hormones might be involved in modulating brain metal ion homeostasis, we treated 7.5-month intact, sham-ovariecomized and ovariectomized C57B6SJL mice with vehicle or leuprolide acetate (for 9-months) to differentiate between whether sex steroids or gonadotropins might modulate brain metal ion concentrations. Unlike other aging mammals, there was no increase in plasma luteinizing hormone (LH) and follicle-stimulating hormone (FSH) concentrations following estropause in mice, suggesting there was sufficient residual production by the follicle depleted ovary, of sex steroids like estrogens and protein hormones like the inhibins, in order to suppress pituitary LH/FSH production. Castration on the other hand induced significant increases in circulating LH and FSH. Modulation of plasma sex steroid and gonadotropin levels did not significantly alter the concentrations of brain metals tested (Fe, Zn, Cu, Mn, Co, Ni, Al, Li), although there was a tendency for a decrease in all brain metals following ovariectomy (low estrogens and progesterone, high gonadotropins), a response that was reversed with leuprolide acetate treatment (low sex steroids, low gonadotropins). Brain Cu concentration was the only metal correlated with plasma LH (−0.37, n = 30, p < 0.05) and FSH (−0.42, n = 29, p < 0.01). This study demonstrates that sex hormones do not markedly alter brain metal ion homeostasis, unlike previously reported studies of circulating metal ion homeostasis. The role of gonadotropins in regulating metal ion homeostasis does however warrant further study.
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Affiliation(s)
- Tianbing Liu
- Institute of Pathology, Case Western Reserve University School of Medicine, Cleveland, OH, United States
- Department of Pathology and Laboratory Medicine, University of Wisconsin Madison School of Medicine and Public Health, Madison, WI, United States
| | | | - Andrea C. Wilson
- Institute of Pathology, Case Western Reserve University School of Medicine, Cleveland, OH, United States
- Department of Pathology and Laboratory Medicine, University of Wisconsin Madison School of Medicine and Public Health, Madison, WI, United States
| | - Craig S. Atwood
- Institute of Pathology, Case Western Reserve University School of Medicine, Cleveland, OH, United States
- Division of Geriatrics and Gerontology, Department of Medicine, University of Wisconsin Madison School of Medicine and Public Health, Madison, WI, United States
- Geriatric Research, Education and Clinical Center, Veterans Administration Hospital, Madison, WI, United States
- School of Exercise, Biomedical and Health Sciences, Edith Cowan University, Joondalup, WA, Australia
- *Correspondence: Craig S. Atwood
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Zheng J, Zhu T, Yang G, Zhao L, Li F, Park YM, Tabung FK, Steck SE, Li X, Wang H. The Isocaloric Substitution of Plant-Based and Animal-Based Protein in Relation to Aging-Related Health Outcomes: A Systematic Review. Nutrients 2022; 14:nu14020272. [PMID: 35057453 PMCID: PMC8781188 DOI: 10.3390/nu14020272] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2021] [Revised: 12/31/2021] [Accepted: 01/04/2022] [Indexed: 02/01/2023] Open
Abstract
Plant-based and animal-based protein intake have differential effects on various aging-related health outcomes, but less is known about the health effect of isocaloric substitution of plant-based and animal-based protein. This systematic review summarized current evidence of the isocaloric substitutional effect of plant-based and animal-based protein on aging-related health outcomes. PubMed and Embase databases were searched for epidemiologic observational studies published in English up to 15 March 2021. Studies that included adults ≥18 years old; use of a nutritional substitution model to define isocaloric substitution of plant protein and animal protein; health outcomes covering mortality, aging-related diseases or indices; and reported association estimates with corresponding 95% confidence intervals were included. Nine cohort studies and 3 cross-sectional studies were identified, with a total of 1,450,178 subjects included in this review. Consistent and significant inverse association of substituting plant protein for various animal proteins on all-cause mortality was observed among 4 out of 5 studies with relative risks (RRs) from 0.54 to 0.95 and on cardiovascular disease (CVD) mortality among all 4 studies with RRs from 0.58 to 0.91. Among specific animal proteins, the strongest inverse association on all-cause and CVD mortality was identified when substituting plant protein for red and/or processed meat protein, with the effect mainly limited to bread, cereal, and pasta protein when replacing red meat protein. Isocaloric substitution of plant-based protein for animal-based protein might prevent all-cause and CVD-specific mortality. More studies are needed on this topic, particularly for cancer incidence and other specific aging-related diseases.
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Affiliation(s)
- Jiali Zheng
- School of Public Health, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China; (J.Z.); (T.Z.); (G.Y.)
| | - Tianren Zhu
- School of Public Health, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China; (J.Z.); (T.Z.); (G.Y.)
| | - Guanghuan Yang
- School of Public Health, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China; (J.Z.); (T.Z.); (G.Y.)
| | - Longgang Zhao
- Department of Epidemiology and Biostatistics, Arnold School of Public Health, University of South Carolina, Columbia, SC 29208, USA; (L.Z.); (S.E.S.)
| | - Fangyu Li
- Department of Epidemiology, Division of Cancer Prevention and Population Sciences, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA;
| | - Yong-Moon Park
- Department of Epidemiology, Fay W. Boozman College of Public Health, University of Arkansas for Medical Sciences, Little Rock, AR 72205, USA;
| | - Fred K. Tabung
- Department of Internal Medicine, Division of Medical Oncology, The Ohio State University College of Medicine and Comprehensive Cancer Center, Columbus, OH 43210, USA;
| | - Susan E. Steck
- Department of Epidemiology and Biostatistics, Arnold School of Public Health, University of South Carolina, Columbia, SC 29208, USA; (L.Z.); (S.E.S.)
| | - Xiaoguang Li
- School of Public Health, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China; (J.Z.); (T.Z.); (G.Y.)
- State Key Laboratory of Oncogenes and Related Genes, Center for Single-Cell Omics, School of Public Health, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
- Correspondence: (X.L.); (H.W.)
| | - Hui Wang
- School of Public Health, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China; (J.Z.); (T.Z.); (G.Y.)
- State Key Laboratory of Oncogenes and Related Genes, Center for Single-Cell Omics, School of Public Health, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
- Correspondence: (X.L.); (H.W.)
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Barros PR, Costa TJ, Akamine EH, Tostes RC. Vascular Aging in Rodent Models: Contrasting Mechanisms Driving the Female and Male Vascular Senescence. FRONTIERS IN AGING 2021; 2:727604. [PMID: 35821995 PMCID: PMC9261394 DOI: 10.3389/fragi.2021.727604] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/19/2021] [Accepted: 08/25/2021] [Indexed: 12/12/2022]
Abstract
Increasing scientific interest has been directed to sex as a biological and decisive factor on several diseases. Several different mechanisms orchestrate vascular function, as well as vascular dysfunction in cardiovascular and metabolic diseases in males and females. Certain vascular sex differences are present throughout life, while others are more evident before the menopause, suggesting two important and correlated drivers: genetic and hormonal factors. With the increasing life expectancy and aging population, studies on aging-related diseases and aging-related physiological changes have steeply grown and, with them, the use of aging animal models. Mouse and rat models of aging, the most studied laboratory animals in aging research, exhibit sex differences in many systems and physiological functions, as well as sex differences in the aging process and aging-associated cardiovascular changes. In the present review, we introduce the most common aging and senescence-accelerated animal models and emphasize that sex is a biological variable that should be considered in aging studies. Sex differences in the cardiovascular system, with a focus on sex differences in aging-associated vascular alterations (endothelial dysfunction, remodeling and oxidative and inflammatory processes) in these animal models are reviewed and discussed.
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Affiliation(s)
- Paula R. Barros
- Department of Pharmacology, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, Brazil
| | - Tiago J. Costa
- Department of Pharmacology, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, Brazil
| | - Eliana H. Akamine
- Department of Pharmacology, Institute of Biomedical Science, University of São Paulo, São Paulo, Brazil
- *Correspondence: Rita C. Tostes, ; Eliana H. Akamine,
| | - Rita C. Tostes
- Department of Pharmacology, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, Brazil
- *Correspondence: Rita C. Tostes, ; Eliana H. Akamine,
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Yang J, Chen S, Li Y, Wang B, Xin X, Xue X, Pan Z, Lyu J. Incidence rate and risk factors for suicide death in patients with skin malignant melanoma: a Surveillance, Epidemiology, and End Results analysis. Melanoma Res 2021; 30:402-409. [PMID: 30489483 DOI: 10.1097/cmr.0000000000000559] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
The purpose of this study was to use the Surveillance, Epidemiology, and End Results database to identify the incidence rate and risk factors for suicide death in patients with skin malignant melanoma (MM) in the USA. We screened cases of skin MM in the SEER database. The balance of covariates between the two groups was examined by the χ-test and Fisher's exact test. Logistic regression was used to identify independent risk factors for committing suicide. A propensity 1: 2 matched analysis was applied to minimize the risk of bias. In total, 103 500 patients with skin MM were included in the study, of whom 623 had died of suicide. The rate of suicide death did not differ significantly between different time intervals. In logistic regression before propensity score matching, age, being divorced, separated, or widowed, receiving radiation or chemotherapy, and the elapsed time since diagnosis were independently associated with an increased rate of suicide death. Only age (P < 0.001) and being in the first year after a diagnosis (P < 0.001) significantly increased the risk of suicide death after propensity score matching. In addition, after the propensity score matching, age was a risk factor for localized, regional, and unstaged, and being the first year after a diagnosis was only a risk factor for regional. It is important to identify and treat people at risk of suicide as early as possible. These results can help clinicians to understand suicidal patients and provide them with appropriate support.
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Affiliation(s)
- Jin Yang
- Clinical Research Center.,School of Public Health
| | - Siying Chen
- Department of Pharmacy, The First Affiliated Hospital of Xi'an Jiaotong University
| | - Yuanjie Li
- Department of Human Anatomy, Histology and Embryology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center
| | - Bin Wang
- Outpatient Department, Qingdao Branch of Naval Aviation University, Qingdao, China
| | - Xiaojing Xin
- Outpatient Department, Qingdao Branch of Naval Aviation University, Qingdao, China
| | - Xia Xue
- Department of Pharmacy, The Affiliated Children Hospital of Xi'an Jiaotong University, Xi'an
| | - Zhenyu Pan
- Clinical Research Center.,School of Public Health.,Department of Pharmacy, The Affiliated Children Hospital of Xi'an Jiaotong University, Xi'an
| | - Jun Lyu
- Clinical Research Center.,School of Public Health
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Sugrue VJ, Zoller JA, Narayan P, Lu AT, Ortega-Recalde OJ, Grant MJ, Bawden CS, Rudiger SR, Haghani A, Bond DM, Hore RR, Garratt M, Sears KE, Wang N, Yang XW, Snell RG, Hore TA, Horvath S. Castration delays epigenetic aging and feminizes DNA methylation at androgen-regulated loci. eLife 2021; 10:e64932. [PMID: 34227937 PMCID: PMC8260231 DOI: 10.7554/elife.64932] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2020] [Accepted: 06/15/2021] [Indexed: 12/26/2022] Open
Abstract
In mammals, females generally live longer than males. Nevertheless, the mechanisms underpinning sex-dependent longevity are currently unclear. Epigenetic clocks are powerful biological biomarkers capable of precisely estimating chronological age and identifying novel factors influencing the aging rate using only DNA methylation data. In this study, we developed the first epigenetic clock for domesticated sheep (Ovis aries), which can predict chronological age with a median absolute error of 5.1 months. We have discovered that castrated male sheep have a decelerated aging rate compared to intact males, mediated at least in part by the removal of androgens. Furthermore, we identified several androgen-sensitive CpG dinucleotides that become progressively hypomethylated with age in intact males, but remain stable in castrated males and females. Comparable sex-specific methylation differences in MKLN1 also exist in bat skin and a range of mouse tissues that have high androgen receptor expression, indicating that it may drive androgen-dependent hypomethylation in divergent mammalian species. In characterizing these sites, we identify biologically plausible mechanisms explaining how androgens drive male-accelerated aging.
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Affiliation(s)
| | - Joseph Alan Zoller
- Department of Biostatistics, Fielding School of Public Health, University of California, Los AngelesLos AngelesUnited States
| | - Pritika Narayan
- Applied Translational Genetics Group, School of Biological Sciences, Centre for Brain Research, The University of AucklandAucklandNew Zealand
| | - Ake T Lu
- Department of Human Genetics, David Geffen School of Medicine, University of California, Los AngelesLos AngelesUnited States
| | | | - Matthew J Grant
- Applied Translational Genetics Group, School of Biological Sciences, Centre for Brain Research, The University of AucklandAucklandNew Zealand
| | - C Simon Bawden
- Livestock and Farming Systems, South Australian Research and Development InstituteRoseworthyAustralia
| | - Skye R Rudiger
- Livestock and Farming Systems, South Australian Research and Development InstituteRoseworthyAustralia
| | - Amin Haghani
- Department of Human Genetics, David Geffen School of Medicine, University of California, Los AngelesLos AngelesUnited States
| | - Donna M Bond
- Department of Anatomy, University of OtagoDunedinNew Zealand
| | - Reuben R Hore
- Blackstone Hill Station, Becks, RD2OmakauNew Zealand
| | - Michael Garratt
- Department of Anatomy, University of OtagoDunedinNew Zealand
| | - Karen E Sears
- Department of Ecology and Evolutionary Biology, UCLALos AngelesUnited States
| | - Nan Wang
- Center for Neurobehavioral Genetics, Semel Institute for Neuroscience and Human Behavior, University of California, Los Angeles (UCLA)Los AngelesUnited States
| | - Xiangdong William Yang
- Center for Neurobehavioral Genetics, Semel Institute for Neuroscience and Human Behavior, University of California, Los Angeles (UCLA)Los AngelesUnited States
- Department of Psychiatry and Biobehavioral Sciences, David Geffen School of Medicine at UCLALos AngelesUnited States
| | - Russell G Snell
- Applied Translational Genetics Group, School of Biological Sciences, Centre for Brain Research, The University of AucklandAucklandNew Zealand
| | - Timothy A Hore
- Department of Anatomy, University of OtagoDunedinNew Zealand
| | - Steve Horvath
- Department of Human Genetics, David Geffen School of Medicine, University of California, Los AngelesLos AngelesUnited States
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Singh NK, Firdose H. Characterizing the impact of advancing age on 500 Hz tone-burst evoked ocular-vestibular evoked myogenic potentials. Eur Arch Otorhinolaryngol 2021; 278:4259-4268. [PMID: 33454811 DOI: 10.1007/s00405-020-06542-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2020] [Accepted: 12/01/2020] [Indexed: 11/29/2022]
Abstract
PURPOSE Ageing is process that brings about steady decline in most of the systems, and vestibular system is no different. Although the effects of advancing age on the functioning of the semicircular canals and saccule has been well explored, its impact on the utricle remains the least studied component. While some researchers have investigated the effect of advancing age on the utricular functioning by virtue of studying ocular-vestibular evoked myogenic potentials (oVEMP), the use of smaller sample sizes would hamper the generalization of their results. Therefore, the present study aimed at investigating the effect of advancing age on oVEMP using a substantially larger sample size than the predecessors. METHODS A total of 480 individuals in the age range of 10-70 years were used as participants and were divided into six age groups, each one defined as a decade. Contralateral oVEMPs were elicited by 500-Hz tone-bursts and averaged over 200 sweeps to obtain the final waveform. RESULTS There was a significant decline in the response rates, prolongation of latencies and reduction of peak-to-peak amplitude of oVEMP with increasing age after 50 years (p < 0.05). However, there was no significant difference among the age groups until 50 years of age on any of these parameters (p > 0.05). Further, there was no significant change in inter-aural amplitude difference ratio with increasing age (p > 0.05). CONCLUSION The results of the study confirm significant impact of the ageing process on oVEMP after the age of 50 years and, therefore, age appropriate norms should be considered when using oVEMP for investigating utricular functioning in an individual, especially after the age of 50 years.
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Affiliation(s)
- Niraj Kumar Singh
- Department of Audiology, All India Institute of Speech and Hearing, Mansagangothri, Mysore, 570006, India.
| | - Husna Firdose
- Department of Audiology, All India Institute of Speech and Hearing, Mansagangothri, Mysore, 570006, India
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Marchionni S, Sell C, Lorenzini A. Development and Longevity: Cellular and Molecular Determinants - A Mini-Review. Gerontology 2020; 66:223-230. [PMID: 32036369 DOI: 10.1159/000505327] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2019] [Accepted: 12/10/2019] [Indexed: 11/19/2022] Open
Abstract
Across species, development and longevity are tightly linked. We discuss the relevant literature and suggest that the root for this stringent relationship is the rate of development. The basis for the relationship between rate of development and longevity lies in adaptations that have occurred through evolution at multiple levels of biological complexity: organism, organ, cellular, and molecular. Thus, the analysis of the relationship is of interest for multiple fields of biology.
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Affiliation(s)
- Silvia Marchionni
- Department of Biomedical and Neuromotor Sciences (DIBINEM), University of Bologna, Bologna, Italy
| | - Christian Sell
- Department of Biochemistry & Molecular Biology, Drexel University College of Medicine, Philadelphia, Pennsylvania, USA
| | - Antonello Lorenzini
- Department of Biomedical and Neuromotor Sciences (DIBINEM), University of Bologna, Bologna, Italy,
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12
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Abdollahifar MA, Azad N, Sajadi E, Shams Mofarahe Z, Zare F, Moradi A, Rezaee F, Gholamin M, Abdi S. Vitamin C restores ovarian follicular reservation in a mouse model of aging. Anat Cell Biol 2019; 52:196-203. [PMID: 31338237 PMCID: PMC6624328 DOI: 10.5115/acb.2019.52.2.196] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2018] [Revised: 12/19/2018] [Accepted: 01/03/2019] [Indexed: 12/13/2022] Open
Abstract
Ovarian aging is related to the reduction of oocyte quality and ovarian follicles reservation leading to infertility. Vitamin C is a natural antioxidant which may counteract with adverse effects of aging in the ovary. The aim of this study was to evaluate the possible effect of vitamin C on NMRI mice ovarian aging according to the stereological study. In this experimental study, 36 adult female mice (25-30 g) were divided into two groups: control and vitamin C. Vitamin C (150 mg/kg/day) were administered by oral gavage for 33 weeks. Six animals of each group were sacrificed on week 8, 12, and 33, and right ovary samples were extracted for stereology analysis. Our data showed that the total volume of ovary, cortex, medulla and corpus luteum were significantly increased in vitamin C group in comparison to the control groups (P≤0.05). In addition, the total number of primordial, primary, secondary, and antral follicles as well as granulosa cells were improved in vitamin C group in compared to the control groups (P≤0.05). No significant difference was observed in total volume of oocytes in antral follicles between control and vitamin C groups. Our data showed that vitamin C could notably compensate undesirable effects of ovarian aging in a mouse model.
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Affiliation(s)
- Mohammad-Amin Abdollahifar
- Department of Biology and Anatomical Sciences, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Nahid Azad
- Abnormal Uterine Bleeding Research Center, Semnan University of Medical Sciences, Semnan, Iran
| | - Ensieh Sajadi
- Department of Biology and Anatomical Sciences, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Zahra Shams Mofarahe
- Department of Biology and Anatomical Sciences, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Fatemeh Zare
- Department of Biology and Anatomical Sciences, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Ali Moradi
- Department of Biology and Anatomical Sciences, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Fatereh Rezaee
- Department of Biology and Anatomical Sciences, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Mohammad Gholamin
- School of Nursing and Midwifery, Lorestan University of Medical Sciences, Tehran, Iran
| | - Shabnam Abdi
- Department of Anatomical Sciences & Cognitive Neuroscience, Faculty of Medicine, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran
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13
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Albañil Sánchez JA, da Costa Klosterhoff M, Romano LA, De Martinez Gaspar Martins C. Histological evaluation of vital organs of the livebearer Jenynsia multidentata (Jenyns, 1842) exposed to glyphosate: A comparative analysis of Roundup ® formulations. CHEMOSPHERE 2019; 217:914-924. [PMID: 30471482 DOI: 10.1016/j.chemosphere.2018.11.020] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2018] [Revised: 11/01/2018] [Accepted: 11/02/2018] [Indexed: 06/09/2023]
Abstract
Roundup formulations are herbicides whose active principle is glyphosate. However, these formulations are potentially more toxic to non-target organisms than pure glyphosate. This study aimed to evaluate and compare the toxic potential of the Roundup formulations through histological alterations in fish. Thus, males and females of the neotropical fish species Jenynsia multidentata (Jenyns, 1842) were exposed for 24 or 96 h to the Roundup Original® (RO), Roundup Transorb® (RT) or Roundup WG® (RWG) formulations, at a fixed concentration of 0.5 mg/L of glyphosate. This concentration is close to the maximum glyphosate limits found in the environment and is non-lethal to J. multidentata. The three formulations caused histological damage to the liver, gills and brain of J. multidentata, which increased over the exposure time. Differences in the histological alterations between females and males were observed in the liver and brain. Females were more tolerant to RO and RT than RWG. Males did not exhibit these differences in sensitiveness with formulations. The RWG caused more damage in the liver and gills and RT in the brain. Overall, there were differences in the toxicity of RO, RT and RWG and the toxic effect was presented through histological damage, reinforcing the usefulness of histological biomarkers for Roundup® toxicity. The comparison of the toxic potential of glyphosate-based herbicides is important because it could give support to the governmental organizations to set protective rules for the water ecosystems and human health, as well as to reduce the use of highly toxic formulations in agriculture.
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Affiliation(s)
- Jessica Andrea Albañil Sánchez
- Programa de Pós-Graduação em Ciências Fisiológicas, Instituto de Ciências Biológicas, Universidade Federal do Rio Grande, Av. Itália km 8, 96203-900, Rio Grande, RS, Brazil
| | - Marta da Costa Klosterhoff
- Instituto de Oceanografia, Universidade Federal do Rio Grande, Av. Itália km 8, 96203-900, Rio Grande, RS, Brazil
| | - Luis Alberto Romano
- Instituto de Oceanografia, Universidade Federal do Rio Grande, Av. Itália km 8, 96203-900, Rio Grande, RS, Brazil
| | - Camila De Martinez Gaspar Martins
- Programa de Pós-Graduação em Ciências Fisiológicas, Instituto de Ciências Biológicas, Universidade Federal do Rio Grande, Av. Itália km 8, 96203-900, Rio Grande, RS, Brazil.
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14
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Atwood CS, Ekstein SF. Human versus non-human sex steroid use in hormone replacement therapies part 1: Preclinical data. Mol Cell Endocrinol 2019; 480:12-35. [PMID: 30308266 DOI: 10.1016/j.mce.2018.10.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/29/2016] [Revised: 03/12/2018] [Accepted: 10/04/2018] [Indexed: 11/24/2022]
Abstract
Prior to 2002, hormone replacement therapy (HRT) was considered to be an important component of postmenopausal healthcare. This was based on a plethora of basic, epidemiological and clinical studies demonstrating the health benefits of supplementation with human sex steroids. However, adverse findings from the Women's Health Initiative (WHI) studies that examined the 2 major forms of HRT in use in the US at that time - Premarin (conjugated equine estrogens; CEE) and Prempro (CEE + medroxyprogesterone acetate; MPA), cast a shadow over the use of any form of HRT. Here we review the biochemical and physiological differences between the non-human WHI study hormones - CEE and MPA, and their respective human counterparts 17β-estradiol (E2) and progesterone (P4). Preclinical data from the last 30 years demonstrate clear differences between human and non-human sex steroids on numerous molecular, physiological and functional parameters in brain, heart and reproductive tissue. In contrast to CEE supplementation, which is not always detrimental although certainly not as optimal as E2 supplementation, MPA is clearly not equivalent to P4, having detrimental effects on cognitive, cardiac and reproductive function. Moreover, unlike P4, MPA is clearly antagonistic of the positive effects of E2 and CEE on tissue function. These data indicate that minor chemical changes to human sex steroids result in physiologically distinct actions that are not optimal for tissue health and functioning.
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Affiliation(s)
- Craig S Atwood
- Division of Geriatrics and Gerontology, Department of Medicine, University of Wisconsin-Madison School of Medicine and Public Health, USA; Geriatric Research, Education and Clinical Center, Veterans Administration Hospital, Madison, WI, 53705, USA; School of Exercise, Biomedical and Health Sciences, Edith Cowan University, Joondalup, 6027, WA, Australia.
| | - Samuel F Ekstein
- Division of Geriatrics and Gerontology, Department of Medicine, University of Wisconsin-Madison School of Medicine and Public Health, USA
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Dzakah EE, Waqas A, Wei S, Yu B, Wang X, Fu T, Liu L, Shan G. Loss of miR-83 extends lifespan and affects target gene expression in an age-dependent manner in Caenorhabditis elegans. J Genet Genomics 2018; 45:651-662. [PMID: 30595472 DOI: 10.1016/j.jgg.2018.11.003] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2018] [Revised: 10/11/2018] [Accepted: 11/06/2018] [Indexed: 02/06/2023]
Abstract
MicroRNAs (miRNAs) are short non-coding RNAs that are involved in the post-transcriptional regulation of protein-coding genes. miRNAs modulate lifespan and the aging process in a variety of organisms. In this study, we identified a role of miR-83 in regulating lifespan of Caenorhabditis elegans. mir-83 mutants exhibited extended lifespan, and the overexpression of miR-83 was sufficient to decrease the prolonged lifespan of the mutants. We observed upregulation of the expression levels of a set of miR-83 target genes in young mir-83 mutant adults; while different sets of genes were upregulated in older mir-83 mutant adults. In vivo assays showed that miR-83 regulated expression of target genes including din-1, spp-9 and col-178, and we demonstrated that daf-16 and din-1 were required for the extension of lifespan in the mir-83 mutants. The regulation of din-1 by miR-83 during aging resulted in the differential expression of din-1 targets such as gst-4 and gst-10. In daf-2 mutants, the expression level of miR-83 was significantly reduced compared to wild-type animals. We identified a role for miR-83 in modulating lifespan in C. elegans and provided molecular insights into its functional mechanism.
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Affiliation(s)
- Emmanuel Enoch Dzakah
- Division of Molecular Medicine, Hefei National Laboratory for Physical Sciences at Microscale, the CAS Key Laboratory of Innate Immunity and Chronic Disease, School of Life Sciences, University of Science and Technology of China, Hefei 230027, China; Department of Molecular Biology and Biotechnology, School of Biological Sciences, College of Agriculture and Natural Sciences, University of Cape Coast, Cape Coast 03321, Ghana
| | - Ahmed Waqas
- Division of Molecular Medicine, Hefei National Laboratory for Physical Sciences at Microscale, the CAS Key Laboratory of Innate Immunity and Chronic Disease, School of Life Sciences, University of Science and Technology of China, Hefei 230027, China
| | - Shuai Wei
- Division of Molecular Medicine, Hefei National Laboratory for Physical Sciences at Microscale, the CAS Key Laboratory of Innate Immunity and Chronic Disease, School of Life Sciences, University of Science and Technology of China, Hefei 230027, China
| | - Bin Yu
- Division of Molecular Medicine, Hefei National Laboratory for Physical Sciences at Microscale, the CAS Key Laboratory of Innate Immunity and Chronic Disease, School of Life Sciences, University of Science and Technology of China, Hefei 230027, China
| | - Xiaolin Wang
- Division of Molecular Medicine, Hefei National Laboratory for Physical Sciences at Microscale, the CAS Key Laboratory of Innate Immunity and Chronic Disease, School of Life Sciences, University of Science and Technology of China, Hefei 230027, China
| | - Tao Fu
- Division of Molecular Medicine, Hefei National Laboratory for Physical Sciences at Microscale, the CAS Key Laboratory of Innate Immunity and Chronic Disease, School of Life Sciences, University of Science and Technology of China, Hefei 230027, China
| | - Lei Liu
- Division of Molecular Medicine, Hefei National Laboratory for Physical Sciences at Microscale, the CAS Key Laboratory of Innate Immunity and Chronic Disease, School of Life Sciences, University of Science and Technology of China, Hefei 230027, China
| | - Ge Shan
- Division of Molecular Medicine, Hefei National Laboratory for Physical Sciences at Microscale, the CAS Key Laboratory of Innate Immunity and Chronic Disease, School of Life Sciences, University of Science and Technology of China, Hefei 230027, China; CAS Centre for Excellence in Molecular Cell Science, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai 200031, China.
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16
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Autenrieth CS, Beck EJ, Stelzle D, Mallouris C, Mahy M, Ghys P. Global and regional trends of people living with HIV aged 50 and over: Estimates and projections for 2000-2020. PLoS One 2018; 13:e0207005. [PMID: 30496302 PMCID: PMC6264840 DOI: 10.1371/journal.pone.0207005] [Citation(s) in RCA: 158] [Impact Index Per Article: 26.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2018] [Accepted: 10/23/2018] [Indexed: 01/12/2023] Open
Abstract
BACKGROUND The increasing numbers of people living with HIV (PLHIV) who are receiving antiretroviral therapy (ART) have near normal life-expectancy, resulting in more people living with HIV over the age of 50 years (PLHIV50+). Estimates of the number of PLHIV50+ are needed for the development of tailored therapeutic and prevention interventions at country, regional and global level. METHODS The AIDS Impact Module of the Spectrum software was used to compute the numbers of PLHIV, new infections, and AIDS-related deaths for PLHIV50+ for the years 2000-2016. Projections until 2020 were calculated based on an assumed ART scale-up to 81% coverage by 2020, consistent with the UNAIDS 90-90-90 treatment targets. RESULTS Globally, there were 5.7 million [4.7 million- 6.6 million] PLHIV50+ in 2016. The proportion of PLHIV50+ increased substantially from 8% in 2000 to 16% in 2016 and is expected to increase to 21% by 2020. In 2016, 80% of PLHIV50+ lived in low- and middle-income countries (LMICs), with Eastern and Southern Africa containing the largest number of PLHIV50+. While the proportion of PLHIV50+ was greater in high income countries, LMICs have higher numbers of PLHIV50+ that are expected to continue to increase by 2020. CONCLUSIONS The number of PLHIV50+ has increased dramatically since 2000 and this is expected to continue by 2020, especially in LMICs. HIV prevention campaigns, testing and treatment programs should also focus on the specific needs of PLHIV50+. Integrated health and social services should be developed to cater for the changing physical, psychological and social needs of PLHIV50+, many of whom will need to use HIV and non-HIV services.
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Affiliation(s)
| | - Eduard J. Beck
- UNAIDS, Programme Branch, Geneva, Switzerland
- UNAIDS, Latin American and Caribbean Regional Support Team, Georgetown, Guyana
| | | | | | - Mary Mahy
- UNAIDS, Programme Branch, Geneva, Switzerland
| | - Peter Ghys
- UNAIDS, Programme Branch, Geneva, Switzerland
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17
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Piergallini TJ, Turner J. Tuberculosis in the elderly: Why inflammation matters. Exp Gerontol 2018; 105:32-39. [PMID: 29287772 PMCID: PMC5967410 DOI: 10.1016/j.exger.2017.12.021] [Citation(s) in RCA: 46] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2017] [Revised: 12/22/2017] [Accepted: 12/22/2017] [Indexed: 12/20/2022]
Abstract
Growing old is associated with an increase in the basal inflammatory state of an individual and susceptibility to many diseases, including infectious diseases. Evidence is growing to support the concept that inflammation and disease susceptibility in the elderly is linked. Our studies focus on the infectious disease tuberculosis (TB), which is caused by Mycobacterium tuberculosis (M.tb), a pathogen that infects approximately one fourth of the world's population. Aging is a major risk factor for developing TB, and inflammation has been strongly implicated. In this review we will discuss the relationship between inflammation in the lung and susceptibility to develop and succumb to TB in old age. Further understanding of the relationship between inflammation, age, and M.tb will lead to informed decisions about TB prevention and treatment strategies that are uniquely designed for the elderly.
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Affiliation(s)
- Tucker J Piergallini
- Texas Biomedical Research Institute, San Antonio, TX 78227, United States; College of Medicine, The Ohio State University, Columbus, OH 43210, United States
| | - Joanne Turner
- Texas Biomedical Research Institute, San Antonio, TX 78227, United States.
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18
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Chowdhury MM, Ambler GK, Al Zuhir N, Walker A, Atkins ER, Winterbottom A, Coughlin PA. Morphometric Assessment as a Predictor of Outcome in Older Vascular Surgery Patients. Ann Vasc Surg 2018; 47:90-97. [PMID: 28887259 DOI: 10.1016/j.avsg.2017.08.002] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2016] [Revised: 07/13/2017] [Accepted: 08/30/2017] [Indexed: 12/20/2022]
Abstract
BACKGROUND Frailty is a recognized predictor of poor outcome in patients undergoing surgical intervention. Frailty is intricately linked with body morphology, which can be evaluated using morphometric assessment via computerized tomographic (CT) imaging. We aimed to assess the predictive power of such objective assessments in a broad cohort of vascular surgical patients. METHODS A consecutive series of patients aged over 65 years admitted to a vascular unit, who had undergone CT imaging of the abdomen, were analyzed. Demographic and patient-specific data were collated alongside admission relevant information. Outcomes included mortality, length of stay, health care-related costs, and discharge destination. Images were analyzed for 4 morphometric measurements: (1) psoas muscle area, (2) mean psoas density, (3) subcutaneous fat depth, and (4) intra-abdominal fat depth, all taken at the level of the fourth lumbar vertebra. RESULTS Two hundred and ten patients were initially analyzed. Forty-four patients had significant retroperitoneal and abdominal abnormalities that limited appropriate CT analysis. Decreased subcutaneous fat depth was significantly associated with mortality, readmission within 12 months, and increased cost of health care (P < 0.01, adjusted for confounders). Psoas muscle area was significantly associated with readmission-free survival. CONCLUSIONS Morphometric analysis predicts poorer outcome in a broad cohort of vascular surgery patients. Such assessment is likely to enhance patient counseling regarding individual risk as well as enhancing the ability to undertake risk-modified surgical audit.
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Affiliation(s)
- Mohammed M Chowdhury
- Cambridge Vascular Unit, Cambridge University Hospitals NHS Foundation Trust, Cambridge, UK
| | - Graeme K Ambler
- Cambridge Vascular Unit, Cambridge University Hospitals NHS Foundation Trust, Cambridge, UK
| | - Naail Al Zuhir
- Cambridge Vascular Unit, Cambridge University Hospitals NHS Foundation Trust, Cambridge, UK
| | - Alex Walker
- Cambridge Vascular Unit, Cambridge University Hospitals NHS Foundation Trust, Cambridge, UK
| | - Ellie R Atkins
- Cambridge Vascular Unit, Cambridge University Hospitals NHS Foundation Trust, Cambridge, UK
| | - Andrew Winterbottom
- Department of Interventional Radiology, Cambridge University Hospitals NHS Foundation Trust, Cambridge, UK
| | - Patrick A Coughlin
- Cambridge Vascular Unit, Cambridge University Hospitals NHS Foundation Trust, Cambridge, UK.
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19
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Bhatta S, Blair JA, Casadesus G. Luteinizing Hormone Involvement in Aging Female Cognition: Not All Is Estrogen Loss. Front Endocrinol (Lausanne) 2018; 9:544. [PMID: 30319538 PMCID: PMC6165885 DOI: 10.3389/fendo.2018.00544] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/16/2018] [Accepted: 08/28/2018] [Indexed: 01/29/2023] Open
Abstract
Pervasive age-related dysfunction in hypothalamic-pituitary-gonadal (HPG) axis is associated with cognitive impairments in aging as well as pathogenesis of age-related neurodegenerative diseases such as the Alzheimer's disease (AD). As a major regulator of the HPG axis, the steroid hormone estrogen has been widely studied for its role in regulation of memory. Although estrogen modulates both cognition as well as cognition associated morphological components in a healthy state, the benefits of estrogen replacement therapy on cognition and disease seem to diminish with advancing age. Emerging data suggests an important role for luteinizing hormone (LH) in CNS function, which is another component of the HPG axis that becomes dysregulated during aging, particularly in menopause. The goal of this review is to highlight the current existing literature on LH and provide new insights on possible mechanisms of its action.
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Affiliation(s)
- Sabina Bhatta
- School of Biomedical Sciences, Kent State University, Kent, OH, United States
| | - Jeffrey A. Blair
- School of Biomedical Sciences, Kent State University, Kent, OH, United States
| | - Gemma Casadesus
- School of Biomedical Sciences, Kent State University, Kent, OH, United States
- Department of Biological Sciences, Kent State University, Kent, OH, United States
- *Correspondence: Gemma Casadesus
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20
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Aring L, Steinbach S, Marcus K, May C. Isolation of Distinct Types of Neurons from Fresh Brain Tissue Using Laser Microdissection in Combination with High-Performance Liquid Chromatography-Mass Spectrometry. Methods Mol Biol 2018; 1723:247-260. [PMID: 29344865 DOI: 10.1007/978-1-4939-7558-7_14] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Humans age and the ageing process affects cells in all areas of the human body, including nerve cells within the brain. With advancing age there is also a rise in the probability of developing a neurodegenerative disorder such as, e.g., amyotrophic lateral sclerosis, Huntington's disease, Parkinson's disease, or Alzheimer's disease. In all these age-related neurodegenerative disorders, distinct neuron populations within specific brain regions are primarily affected. For example, Parkinson's disease is characterized by a slowly progressive degeneration of dopaminergic neurons in the substantia nigra whereas the entorhinal cortex is first affected in Alzheimer's disease. In patients suffering from Huntington's disease, neurons in both striatum and cortex undergo substantial cell loss and in amyotrophic lateral sclerosis the neurodegeneration arises from the spinal cord and the motor cortex. For the investigation of the differences in neuronal vulnerability, it is important to examine the protein expression pattern in these specific neural populations. By this, conclusions about the origination process of these diseases can be achieved. In order to obtain this objective, specific isolation of distinct neurons from the surrounding brain tissue is indispensable. However, discrimination as well as isolation of distinct types of neurons can be challenging, due to the brain tissue's complexity. With traditional methods such as the homogenization of tissue samples, a specific isolation of single neuron populations is not feasible because homogenization results into a mixture containing all cell types. Laser microdissection can overcome this technical limitation. First, this method enables visualization of tissues via a microscopic unit and therefore an enhanced discrimination of different brain cells. Second, a laser device guarantees a contact-free and consequently a contamination-free separation of distinct neurons from the surrounding brain tissue. In the following, we present a detailed protocol that includes a workflow for the isolation and analysis of neurons from freshly frozen post mortem human brain tissue samples. During this procedure, the brain tissue is sectioned, stained, laser microdissected, and ultimately analyzed by high-performance liquid chromatography-mass spectrometry.
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Affiliation(s)
- Luisa Aring
- Zentrum für Klinische Forschung I, Medizinisches Proteom-Center, Ruhr-Universität Bochum, Bochum, Germany
| | - Simone Steinbach
- Zentrum für Klinische Forschung I, Medizinisches Proteom-Center, Ruhr-Universität Bochum, Bochum, Germany
| | - Katrin Marcus
- Zentrum für Klinische Forschung I, Medizinisches Proteom-Center, Ruhr-Universität Bochum, Bochum, Germany
| | - Caroline May
- Zentrum für Klinische Forschung I, Medizinisches Proteom-Center, Ruhr-Universität Bochum, Bochum, Germany.
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Saccon TD, Moreira F, Cruz LA, Mondadori RG, Fang Y, Barros CC, Spinel L, Bartke A, Masternak MM, Schneider A. Ovarian aging and the activation of the primordial follicle reserve in the long-lived Ames dwarf and the short-lived bGH transgenic mice. Mol Cell Endocrinol 2017; 455:23-32. [PMID: 27771355 PMCID: PMC5397383 DOI: 10.1016/j.mce.2016.10.015] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/13/2016] [Revised: 06/22/2016] [Accepted: 10/15/2016] [Indexed: 12/09/2022]
Abstract
The aim of this study was to evaluate the effect of growth hormone (GH) in the maintenance of the ovarian primordial follicle reserve. Ovaries from 16 mo old GH-deficient Ames Dwarf (df/df) and Normal (N/df) mice were used. A subgroup of df/df and N mice received GH or saline injections for six weeks starting at 14 mo of age. In addition, ovaries from 12 mo old mice overexpressing bovine GH (bGH) and controls were used. df/df mice had higher number of primordial and total follicles than N/df mice (p < 0.05), while GH treatment decreased follicle counts in both genotypes (p < 0.05). In addition, bGH mice had lower number of primordial and total follicles than the controls (p < 0.05). pFoxO3a levels were higher in mice treated with GH and in bGH mice (p < 0.05) when comparing with age match controls. These results indicate that increased circulating GH is associated with a reduced ovarian primordial follicle reserve and increased pFoxO3a content in oocytes.
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Affiliation(s)
- Tatiana D Saccon
- Faculdade de Nutrição, Universidade Federal de Pelotas, Pelotas, RS, Brazil
| | - Fabiana Moreira
- Campus Araquari, Instituto Federal Catarinense, Araquari, SC, Brazil
| | - Luis A Cruz
- Instituto de Biologia, Universidade Federal de Pelotas, Pelotas, RS, Brazil
| | - Rafael G Mondadori
- Instituto de Biologia, Universidade Federal de Pelotas, Pelotas, RS, Brazil
| | - Yimin Fang
- Departments of Internal Medicine and Physiology, Southern Illinois University School of Medicine, Springfield, IL, USA
| | - Carlos C Barros
- Faculdade de Nutrição, Universidade Federal de Pelotas, Pelotas, RS, Brazil
| | - L Spinel
- College of Medicine, Burnett School of Biomedical Sciences, University of Central Florida, Orlando, FL, USA
| | - A Bartke
- Departments of Internal Medicine and Physiology, Southern Illinois University School of Medicine, Springfield, IL, USA
| | - Michal M Masternak
- College of Medicine, Burnett School of Biomedical Sciences, University of Central Florida, Orlando, FL, USA; Department of Head and Neck Surgery, The Greater Poland Cancer Centre, Poznan, Poland
| | - A Schneider
- Faculdade de Nutrição, Universidade Federal de Pelotas, Pelotas, RS, Brazil; College of Medicine, Burnett School of Biomedical Sciences, University of Central Florida, Orlando, FL, USA.
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Cheraghi P, Cheraghi Z, Doosti-Irani A, Nedjat S, Nedjat S. Quality of Life in Elderly Iranian Population Using Leiden-Padua Questionnaire: A Systematic Review and Meta-Analysis. Int J Prev Med 2017; 8:55. [PMID: 28928913 PMCID: PMC5553249 DOI: 10.4103/ijpvm.ijpvm_265_16] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2016] [Accepted: 02/13/2017] [Indexed: 12/02/2022] Open
Abstract
The world population is getting old rapidly; the aging population is the new phenomenon in Iran too. The aim of this meta-analysis was to estimate the overall and subscales mean score of quality of life (QOL) based on the Leiden-Padua (LEIPAD) questionnaire among the elderly population of Iran. The major international and national databases including; Medlin, Scopus, Science Direct, SID, MagIran, IranMedex, and Irandoc was searched. All cross-sectional studies, which measured the QOL among the elderly population in Iran using the LEIPAD questionnaire, were included. Furthermore, we used the following key words, “Quality of life,” “aging,” “aged,” “elderly,” and “Iran.” Of 2155 records, four articles reminded for the meta-analysis, which involved 628 participants with a mean age of 71.73 ± 4.28 years. The mean scores of QOL in each scale were as follows: 10.80 (9.30–12.31) for physical health, 13.51 (6.81–20.21) for self-care scale, 8.60 (5.07–12.14) for depression and anxiety, 12.48 (10.39–14.58) for cognitive functioning scale, 2.19 (0.67–3.72) for sexual functioning scale, 10.98 (5.87–16.09) for life satisfaction scale, and 5.90 (3.64–8.16) for social desirability scale. This study revealed that the total QOL for the elderly population is relatively low in Iranian society. It is appeared to provide social support, and upgrade their QOL seems to be essential for the elderly population.
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Affiliation(s)
- Parvin Cheraghi
- Department of Health, Education and Promotion, School of Public Health, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Zahra Cheraghi
- Department of Epidemiology and Biostatistics, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Amin Doosti-Irani
- Department of Epidemiology and Biostatistics, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Sima Nedjat
- Knowledge Utilization Research Center, University of Social Welfare and Rehabilitation, Tehran, Iran
| | - Saharnaz Nedjat
- Department of Epidemiology and Biostatistics, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
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Male Ageing or "Mencession": Let's Try to Reclaim the Myth of the Strongest Sex. Eur Urol Focus 2017; 3:311-312. [PMID: 28927727 DOI: 10.1016/j.euf.2017.09.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2017] [Accepted: 09/06/2017] [Indexed: 11/23/2022]
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van den Berg N, Beekman M, Smith KR, Janssens A, Slagboom PE. Historical demography and longevity genetics: Back to the future. Ageing Res Rev 2017; 38:28-39. [PMID: 28689042 DOI: 10.1016/j.arr.2017.06.005] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2017] [Revised: 06/30/2017] [Accepted: 06/30/2017] [Indexed: 11/30/2022]
Abstract
Research into the genetic component of human longevity can provide important insights in mechanisms that may protect against age-related diseases and multi-morbidity. Thus far only a limited number of robust longevity loci have been detected in either candidate or genome wide association studies. One of the issues in these genetic studies is the definition of the trait being either lifespan, including any age at death or longevity, i.e. survival above a diverse series of thresholds. Likewise heritability and segregation research have conflated lifespan with longevity. The heritability of lifespan estimated across most studies has been rather low. Environmental factors have not been sufficiently investigated and the total amount of genetic variance contributing to longevity has not been estimated in sufficiently well-defined and powered studies. Up to now, genetic longevity studies lack the required insights into the nature and size of the genetic component and the optimal strategies for meta-analysis and subject selection for Next Generation Sequencing efforts. Historical demographic data containing deep genealogical information may help in estimating the best definition and heritability for longevity, its transmission patterns in multi-generational datasets and may allow relevant additive and modifying environmental factors such as socio-economic status, geographical background, exposure to environmental effects, birth order, and number of children to be included. In this light historical demographic data may be very useful for identifying lineages in human populations that are worth investigating further by geneticists.
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Affiliation(s)
- Niels van den Berg
- Department of Molecular Epidemiology, Leiden University, Albinusdreef 2, 2333 ZA Leiden, The Netherlands.
| | - Marian Beekman
- Department of Molecular Epidemiology, Leiden University, Albinusdreef 2, 2333 ZA Leiden, The Netherlands.
| | - Ken Robert Smith
- Department of Family and Consumer Studies, Population Sciences, Huntsman Cancer Institute, University of Utah, 225 S. 1400 E. Rm 228, Salt Lake City, United States.
| | - Angelique Janssens
- Department of Economic, Social, and Demographic History, Radboud University, Erasmusplein 1, 6525 HT Nijmegen, The Netherlands.
| | - Pieternella Eline Slagboom
- Department of Molecular Epidemiology, Leiden University, Albinusdreef 2, 2333 ZA Leiden, The Netherlands.
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Zheng Z, Li R, Xiao F, He R, Zhang S, Li J. Sex Matters: Hippocampal Volume Predicts Individual Differences in Associative Memory in Cognitively Normal Older Women but Not Men. Front Hum Neurosci 2017; 11:93. [PMID: 28321185 PMCID: PMC5337694 DOI: 10.3389/fnhum.2017.00093] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2016] [Accepted: 02/15/2017] [Indexed: 11/18/2022] Open
Abstract
The hippocampus plays a prominent role in associative memory by supporting relational binding and recollection processes. Structural atrophy in the hippocampus is likely to induce associative memory deficits in older adults. Previous studies have primarily focused on average age-related differences in hippocampal structure and memory performance. To date, however, it remains unclear whether individual differences in hippocampal morphometry underlie differential associative memory performance, and whether there are sex differences in the structural correlates of associative memory in healthy older adults. Here, we used voxel-based morphometry (VBM) to examine the extent to which gray matter volume (GMV) of the hippocampus predicts associative memory performance in cognitively normal older adults. Seventy-one participants completed a cued recall paired-associative learning test (PALT), which consists of novel associations and semantically related associations, and underwent magnetic resonance imaging (MRI). We observed worse associative memory performance and larger variability for novel associations than for semantically related associations. The VBM results revealed that higher scores on associative memory for novel associations were related to greater hippocampal GMV across all older adults. When considering men and women separately, the correlation between hippocampal GMV and associative memory performance for novel associations reached significance only in older women. These findings suggest that hippocampal structural volumes may predict individual differences in novel associative memory in older women but not men.
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Affiliation(s)
- Zhiwei Zheng
- Center on Aging Psychology, CAS Key Laboratory of Mental Health, Institute of Psychology, Chinese Academy of SciencesBeijing, China; Department of Psychology, University of Chinese Academy of SciencesBeijing, China
| | - Rui Li
- Center on Aging Psychology, CAS Key Laboratory of Mental Health, Institute of Psychology, Chinese Academy of SciencesBeijing, China; Department of Psychology, University of Chinese Academy of SciencesBeijing, China; Magnetic Resonance Imaging Research Center, Institute of Psychology, Chinese Academy of SciencesBeijing, China
| | | | - Rongqiao He
- State Key Laboratory of Brain and Cognitive Science, Institute of Biophysics, Chinese Academy of Sciences Beijing, China
| | | | - Juan Li
- Center on Aging Psychology, CAS Key Laboratory of Mental Health, Institute of Psychology, Chinese Academy of SciencesBeijing, China; Department of Psychology, University of Chinese Academy of SciencesBeijing, China; Magnetic Resonance Imaging Research Center, Institute of Psychology, Chinese Academy of SciencesBeijing, China; State Key Laboratory of Brain and Cognitive Science, Institute of Biophysics, Chinese Academy of SciencesBeijing, China
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26
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Atwood CS, Hayashi K, Meethal SV, Gonzales T, Bowen RL. Does the degree of endocrine dyscrasia post-reproduction dictate post-reproductive lifespan? Lessons from semelparous and iteroparous species. GeroScience 2017; 39:103-116. [PMID: 28271270 PMCID: PMC5352586 DOI: 10.1007/s11357-016-9955-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2016] [Accepted: 12/23/2016] [Indexed: 12/16/2022] Open
Abstract
Post-reproductive lifespan varies greatly among species; human post-reproductive lifespan comprises ~30-50% of their total longevity, while semelparous salmon and dasyurid marsupials post-reproductive lifespan comprises <4% of their total longevity. To examine if the magnitude of hypothalamic-pituitary-gonadal (HPG) axis dyscrasia at the time of reproductive senescence determines post-reproductive lifespan, we examined the difference between pre- and post-reproductive (1) circulating sex hormones and (2) the ratio of sex steroids to gonadotropins (e.g., 17β-estradiol/follicle-stimulating hormone (FSH)), an index of the dysregulation of the HPG axis and the level of dyotic (death) signaling post-reproduction. Animals with a shorter post-reproductive lifespan (<4% total longevity) had a more marked decline in circulating sex steroids and corresponding elevation in gonadotropins compared to animals with a longer post-reproductive lifespan (30-60% total longevity). In semelparous female salmon of short post-reproductive lifespan (1%), these divergent changes in circulating hormone concentration post-reproduction equated to a 711-fold decrease in the ratio of 17β-estradiol/FSH between the reproductive and post-reproductive periods. In contrast, the decrease in the ratio of 17β-estradiol/FSH in iteroparous female mammals with long post-reproductive lifespan was significantly less (1.7-34-fold) post-reproduction. Likewise, in male semelparous salmon, the decrease in the ratio of testosterone/FSH (82-fold) was considerably larger than for iteroparous species (1.3-11-fold). These results suggest that (1) organisms with greater reproductive endocrine dyscrasia more rapidly undergo senescence and die, and (2) the contribution post-reproduction by non-gonadal (and perhaps gonadal) tissues to circulating sex hormones dictates post-reproductive tissue health and longevity. In this way, reproduction and longevity are coupled, with the degree of non-gonadal tissue hormone production dictating the rate of somatic tissue demise post-reproduction and the differences in post-reproductive lifespans between species.
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Affiliation(s)
- Craig S Atwood
- Division of Geriatrics and Gerontology, Department of Medicine, University of Wisconsin-Madison School of Medicine and Public Health, William S. Middleton Memorial VA (GRECC 11G), 2500 Overlook Terrace, Madison, WI, 53705, USA.
- Geriatric Research, Education and Clinical Center, Veterans Administration Hospital, Madison, WI, 53705, USA.
- School of Exercise, Biomedical and Health Sciences, Edith Cowan University, Joondalup, WA, 6027, Australia.
| | - Kentaro Hayashi
- Division of Geriatrics and Gerontology, Department of Medicine, University of Wisconsin-Madison School of Medicine and Public Health, William S. Middleton Memorial VA (GRECC 11G), 2500 Overlook Terrace, Madison, WI, 53705, USA
| | - Sivan Vadakkadath Meethal
- Division of Geriatrics and Gerontology, Department of Medicine, University of Wisconsin-Madison School of Medicine and Public Health, William S. Middleton Memorial VA (GRECC 11G), 2500 Overlook Terrace, Madison, WI, 53705, USA
| | - Tina Gonzales
- Division of Geriatrics and Gerontology, Department of Medicine, University of Wisconsin-Madison School of Medicine and Public Health, William S. Middleton Memorial VA (GRECC 11G), 2500 Overlook Terrace, Madison, WI, 53705, USA
| | - Richard L Bowen
- Department of Psychiatry, Medical University of South Carolina, Charleston, SC, 29425, USA
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Bennis MT, Schneider A, Victoria B, Do A, Wiesenborn DS, Spinel L, Gesing A, Kopchick JJ, Siddiqi SA, Masternak MM. The role of transplanted visceral fat from the long-lived growth hormone receptor knockout mice on insulin signaling. GeroScience 2017; 39:51-59. [PMID: 28299640 PMCID: PMC5352587 DOI: 10.1007/s11357-017-9957-y] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2016] [Accepted: 01/04/2017] [Indexed: 10/20/2022] Open
Abstract
Growth hormone receptor knockout mice (GHRKO) are characterized by high insulin sensitivity and extended lifespan. Interestingly, the secretory activity of visceral fat in GHRKO mice is altered, stimulating whole body insulin sensitivity. In this study, we transplanted normal (N) mice with visceral fat pads from GHRKO or N mice to determine the role of visceral fat on the insulin signaling. We found that the transplant of visceral fat from GHRKO mice to N mice (N-GHRKO) improved whole body insulin sensitivity when comparing with sham-operated mice (N-S) and with mice that received visceral fat from N mice (N-N). This was associated with increased hepatic insulin sensitivity as observed by the increased phosphorylated insulin receptor and increased hepatic expression of Pparα and Pparγ. In conclusion, we demonstrated that visceral fat transplant from GHRKO mice into normal mice enhanced insulin sensitivity and glucose tolerance. These results further confirm the differential physiological role played by visceral adipose tissue from GH receptor deficient mice, indicating that the increase of this fat depot can be associated with beneficial effects on insulin signaling and longevity.
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Affiliation(s)
- Mohammed T Bennis
- College of Medicine, Burnett School of Biomedical Sciences, University of Central Florida, 6900 Lake Nona Blvd., Orlando, FL, 32827, USA
| | - Augusto Schneider
- Faculdade de Nutrição, Universidade Federal de Pelotas, Pelotas, RS, Brazil
| | - Berta Victoria
- College of Medicine, Burnett School of Biomedical Sciences, University of Central Florida, 6900 Lake Nona Blvd., Orlando, FL, 32827, USA
| | - Andrew Do
- Charles E. Schmidt College of Medicine, Florida Atlantic University, Boca Raton, FL, 33431, USA
| | - Denise S Wiesenborn
- College of Medicine, Burnett School of Biomedical Sciences, University of Central Florida, 6900 Lake Nona Blvd., Orlando, FL, 32827, USA
- Department of Medical Biochemistry and Molecular Biology, University of Saarland, 66421, Homburg, Germany
- Department of Biotechnology, University of Applied Sciences Kaiserslautern, 66482, Zweibrücken, Germany
| | - Lina Spinel
- College of Medicine, Burnett School of Biomedical Sciences, University of Central Florida, 6900 Lake Nona Blvd., Orlando, FL, 32827, USA
| | - Adam Gesing
- Department of Oncological Endocrinology, Medical University of Lodz, Lodz, Poland
| | - John J Kopchick
- Edison Biotechnology Institute, Department of Biomedical Sciences, Ohio University, Athens, OH, 45701, USA
| | - Shadab A Siddiqi
- College of Medicine, Burnett School of Biomedical Sciences, University of Central Florida, 6900 Lake Nona Blvd., Orlando, FL, 32827, USA
| | - Michal M Masternak
- College of Medicine, Burnett School of Biomedical Sciences, University of Central Florida, 6900 Lake Nona Blvd., Orlando, FL, 32827, USA.
- Department of Head and Neck Surgery, The Greater Poland Cancer Centre, Poznan, Poland.
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28
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Gao L, Zhang R, Lan J, Ning R, Wu D, Chen D, Zhao W. β-Dihydroagarofuran-Type Sesquiterpenes from the Seeds of Celastrus monospermus and Their Lifespan-Extending Effects on the Nematode Caenorhabditis elegans. JOURNAL OF NATURAL PRODUCTS 2016; 79:3039-3046. [PMID: 28006915 DOI: 10.1021/acs.jnatprod.6b00648] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Seventeen β-dihydroagarofuran-type sesquiterpenes were isolated from the seeds of Celastrus monospermus, and, among them, 15 (1-15) were identified as new natural products. Nine isolates were evaluated for their lifespan-extending effect using the standard model animal nematode Caenorhabditis elegans. As a result, all of the tested compounds prolonged the lifespan of C. elegans when compared to the blank control group (p < 0.0001). Among them, celaspermin E (5) extended the average lifespan and maximum lifespan of C. elegans, with effects similar to those of rapamycin, a positive control that has been found experimentally to delay the aging process of yeasts, worms, fruit flies, and mice.
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Affiliation(s)
- Lei Gao
- Department of Natural Product Chemistry and State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences , Shanghai 201203, People's Republic of China
- University of Chinese Academy of Sciences , Beijing 100049, People's Republic of China
| | - Rujun Zhang
- Department of Natural Product Chemistry and State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences , Shanghai 201203, People's Republic of China
| | - Jianfeng Lan
- State Key Laboratory of Pharmaceutical Biotechnology and MOE Key Laboratory of Model Animals for Disease Study, Model Animal Research Center, Nanjing University , Nanjing 210061, People's Republic of China
| | - Ruonan Ning
- Department of Natural Product Chemistry and State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences , Shanghai 201203, People's Republic of China
- University of Chinese Academy of Sciences , Beijing 100049, People's Republic of China
| | - Di Wu
- State Key Laboratory of Pharmaceutical Biotechnology and MOE Key Laboratory of Model Animals for Disease Study, Model Animal Research Center, Nanjing University , Nanjing 210061, People's Republic of China
| | - Di Chen
- State Key Laboratory of Pharmaceutical Biotechnology and MOE Key Laboratory of Model Animals for Disease Study, Model Animal Research Center, Nanjing University , Nanjing 210061, People's Republic of China
| | - Weimin Zhao
- Department of Natural Product Chemistry and State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences , Shanghai 201203, People's Republic of China
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Wigfield CH, Buie V, Onsager D. "Age" in lung transplantation: factors related to outcomes and other considerations. CURRENT PULMONOLOGY REPORTS 2016; 5:152-158. [PMID: 27610336 PMCID: PMC4992499 DOI: 10.1007/s13665-016-0151-y] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
The age of lung transplant recipients is steadily increasing. Older donors are more frequently considered. The risk factors associated with advanced age in lung transplantation warrant discussion to ensure optimal outcomes in this complex endeavor. This report provides a summary of the pertinent topics and available evidence.
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30
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Atwood CS, Vadakkadath Meethal S. The spatiotemporal hormonal orchestration of human folliculogenesis, early embryogenesis and blastocyst implantation. Mol Cell Endocrinol 2016; 430:33-48. [PMID: 27045358 DOI: 10.1016/j.mce.2016.03.039] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/08/2016] [Accepted: 03/30/2016] [Indexed: 11/18/2022]
Abstract
The early reproductive events starting with folliculogenesis and ending with blastocyst implantation into the uterine endometrium are regulated by a complex interplay among endocrine, paracrine and autocrine factors. This review examines the spatiotemporal integration of these maternal and embryonic signals that are required for successful reproduction. In coordination with hypothalamic-pituitary-gonadal (HPG) hormones, an intraovarian HPG-like axis regulates folliculogenesis, follicular quiescence, ovulation, follicular atresia, and corpus luteal functions. Upon conception and passage of the zygote through the fallopian tube, the contribution of maternal hormones in the form of paracrine secretions from the endosalpinx to embryonic development declines, with autocrine and paracrine signaling becoming increasingly important as instructional signals for the differentiation of the early zygote/morula into a blastocyst. These maternal and embryonic signals include activin and gonadotropin-releasing hormone 1 (GnRH1) that are crucial for the synthesis and secretion of the 'pregnancy' hormone human chorionic gonadotropin (hCG). hCG in turn signals pre-implantation embryonic cell division and sex steroid production required for stem cell differentiation, and subsequent blastulation, gastrulation, cavitation and blastocyst formation. Upon reaching the uterus, blastocyst hatching occurs under the influence of decreased activin signaling, while the attachment and invasion of the trophoblast into the endometrium appears to be driven by a decrease in activin signaling, and by increased GnRH1 and hCG signaling that allows for tissue remodeling and the controlled invasion of the blastocyst into the uterine endometrium. This review demonstrates the importance of integrative endocrine, paracrine, and autocrine signaling for successful human reproduction.
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Affiliation(s)
- Craig S Atwood
- Department of Medicine, University of Wisconsin-Madison School of Medicine and Public Health, Madison, WI 53705, USA; Geriatric Research, Education and Clinical Center, Veterans Administration Hospital, Madison, WI 53705, USA; School of Exercise, Biomedical and Health Sciences, Edith Cowan University, Joondalup, 6027 WA, Australia.
| | - Sivan Vadakkadath Meethal
- Department of Medicine, University of Wisconsin-Madison School of Medicine and Public Health, Madison, WI 53705, USA; Department of Neurological Surgery, University of Wisconsin-Madison School of Medicine and Public Health, WI 53792, USA
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31
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Atwood CS, Bowen RL. A Unified Hypothesis of Early- and Late-Onset Alzheimer's Disease Pathogenesis. J Alzheimers Dis 2016; 47:33-47. [PMID: 26402752 DOI: 10.3233/jad-143210] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Early-onset familial Alzheimer's disease (EOFAD) and late-onset sporadic AD (LOSAD) both follow a similar pathological and biochemical course that includes: neuron and synapse loss and dysfunction, microvascular damage, microgliosis, extracellular amyloid-β deposition, tau phosphorylation, formation of intracellular neurofibrillary tangles, endoreduplication and related cell cycle events in affected brain regions. Any mechanistic explanation of AD must accommodate these biochemical and neuropathological features for both forms of the disease. In this insight paper we provide a unifying hypothesis for EOFAD and LOSAD that proposes that the aberrant re-entry of terminally differentiated, post-mitotic neurons into the cell division cycle is a common pathway that explains both early and late-onset forms of AD. Cell cycle abnormalities appear very early in the disease process, prior to the appearance of plaques and tangles, and explain the biochemical (e.g. tau phosphorylation), neuropathological (e.g. neuron hypertrophy; polypoidy) and cognitive changes observed in EOFAD and LOSAD. Genetic mutations in AβPP, PSEN1, and PSEN2 that alter amyloid-β precursor protein and Notch processing drive reactivation of the cell cycle in EOFAD, while age-related reproductive endocrine dyscrasia that upregulates mitogenic TNF signaling and AβPP processing toward the amyloidogenic pathway drives reactivation of the cell cycle in LOSAD. In essence, AβPP and presenilin mutations initiate early, what endocrine dyscrasia initiates later: aberrant cell cycle re-entry of post-mitotic neurons leading to neurodegeneration and cognitive decline in AD. Inhibition of cell cycle re-entry in post-mitotic neurons may be a useful therapeutic strategy to prevent, slow or halt disease progression.
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Affiliation(s)
- Craig S Atwood
- Department of Medicine, University of Wisconsin-Madison School of Medicine and Public Health, Madison, WI, USA.,Geriatric Research, Education and Clinical Center, Veterans Administration Hospital, Madison, WI, USA.,School of Exercise, Biomedical and Health Sciences, Edith Cowan University, Joondalup, WA, Australia
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32
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Meng G, Zhong X, Mei H. A Systematic Investigation into Aging Related Genes in Brain and Their Relationship with Alzheimer's Disease. PLoS One 2016; 11:e0150624. [PMID: 26937969 PMCID: PMC4777381 DOI: 10.1371/journal.pone.0150624] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2015] [Accepted: 02/17/2016] [Indexed: 01/08/2023] Open
Abstract
Aging, as a complex biological process, is accompanied by the accumulation of functional loses at different levels, which makes age to be the biggest risk factor to many neurological diseases. Even following decades of investigation, the process of aging is still far from being fully understood, especially at a systematic level. In this study, we identified aging related genes in brain by collecting the ones with sustained and consistent gene expression or DNA methylation changes in the aging process. Functional analysis with Gene Ontology to these genes suggested transcriptional regulators to be the most affected genes in the aging process. Transcription regulation analysis found some transcription factors, especially Specificity Protein 1 (SP1), to play important roles in regulating aging related gene expression. Module-based functional analysis indicated these genes to be associated with many well-known aging related pathways, supporting the validity of our approach to select aging related genes. Finally, we investigated the roles of aging related genes on Alzheimer's Disease (AD). We found that aging and AD related genes both involved some common pathways, which provided a possible explanation why aging made the brain more vulnerable to Alzheimer's Disease.
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Affiliation(s)
- Guofeng Meng
- Computational Modeling Sciences, Platform Technologies and Science, GlaxoSmithKline Research & Development, Shanghai, China
| | - Xiaoyan Zhong
- Neurodegeneration DPU, GlaxoSmithKline Research & Development, Shanghai, China
| | - Hongkang Mei
- Computational Modeling Sciences, Platform Technologies and Science, GlaxoSmithKline Research & Development, Shanghai, China
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Jura M, Kozak LP. Obesity and related consequences to ageing. AGE (DORDRECHT, NETHERLANDS) 2016; 38:23. [PMID: 26846415 PMCID: PMC5005878 DOI: 10.1007/s11357-016-9884-3] [Citation(s) in RCA: 245] [Impact Index Per Article: 30.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/26/2015] [Accepted: 01/26/2016] [Indexed: 04/17/2023]
Abstract
Obesity has become a major public health problem. Given the current increase in life expectancy, the prevalence of obesity also raises steadily among older age groups. The increase in life expectancy is often accompanied with additional years of susceptibility to chronic ill health associated with obesity in the elderly. Both obesity and ageing are conditions leading to serious health problems and increased risk for disease and death. Ageing is associated with an increase in abdominal obesity, a major contributor to insulin resistance and the metabolic syndrome. Obesity in the elderly is thus a serious concern and comprehension of the key mechanisms of ageing and age-related diseases has become a necessary matter. Here, we aimed to identify similarities underlying mechanisms related to both obesity and ageing. We bring together evidence that age-related changes in body fat distribution and metabolism might be key factors of a vicious cycle that can accelerate the ageing process and onset of age-related diseases.
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Affiliation(s)
- Magdalena Jura
- Institute of Animal Reproduction and Food Research, Polish Academy of Science, ul. Tuwima 10, 10-748, Olsztyn, Poland.
| | - Leslie P Kozak
- Institute of Animal Reproduction and Food Research, Polish Academy of Science, ul. Tuwima 10, 10-748, Olsztyn, Poland.
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34
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Pathak P, Vyas M, Vyas H, Naria M. Rasayana effect of Guduchi Churna on the life span of Drosophila melanogaster. Ayu 2016; 37:67-70. [PMID: 28827958 PMCID: PMC5541470 DOI: 10.4103/ayu.ayu_11_16] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
INTRODUCTION The Drosophila melanogaster is one of the most extensively studied animal models for understanding the process of aging and longevity. This fly is being used for genetic studies since almost a century. Guduchi (Tinospora cordifolia [Wild.] Miers.) is an Ayurvedic drug used as Rasayana (rejuvenation) due to its antiaging effect. AIM To explore the potential of Guduchi Churna (powder of T. cordifolia) on the life span of D. melanogaster using adult feeding method. MATERIALS AND METHODS For experimental setups, the regular food media were mixed with Guduchi Churna in different concentrations (0.25 g/100 ml, 0.50 g/100 ml, and 0.70 g/100 ml). Flies were exposed to these concentrations for 30 days. RESULTS Increase in the lifespan was observed in both parent and F-1 generation. Applying of ANOVA revealed significant difference between control and drug groups. The longevity effect, in the drug group was seen even on F-1 generation. CONCLUSION Guduchi Churna enhances the life span of D. melanogaster in both parent and F-1 generation.
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Affiliation(s)
- Pankaj Pathak
- Department of Basic Principles, JSS Ayurveda Medical College, Mysore, Karnataka, India
| | - Mahesh Vyas
- Department of Basic Principles, Institute for Postgraduate Teaching and Research in Ayurveda, Gujarat Ayurved University, Jamnagar, Gujarat, India
| | - Hitesh Vyas
- Department of Basic Principles, Institute for Postgraduate Teaching and Research in Ayurveda, Gujarat Ayurved University, Jamnagar, Gujarat, India
| | - Mukesh Naria
- Department of Pharmacology Laboratory, Institute for Postgraduate Teaching and Research in Ayurveda, Gujarat Ayurved University, Jamnagar, Gujarat, India
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35
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Atwood CS, Bowen RL. The endocrine dyscrasia that accompanies menopause and andropause induces aberrant cell cycle signaling that triggers re-entry of post-mitotic neurons into the cell cycle, neurodysfunction, neurodegeneration and cognitive disease. Horm Behav 2015; 76:63-80. [PMID: 26188949 PMCID: PMC4807861 DOI: 10.1016/j.yhbeh.2015.06.021] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/22/2014] [Revised: 06/23/2015] [Accepted: 06/23/2015] [Indexed: 12/26/2022]
Abstract
This article is part of a Special Issue "SBN 2014". Sex hormones are physiological factors that promote neurogenesis during embryonic and fetal development. During childhood and adulthood these hormones support the maintenance of brain structure and function via neurogenesis and the formation of dendritic spines, axons and synapses required for the capture, processing and retrieval of information (memories). Not surprisingly, changes in these reproductive hormones that occur with menopause and during andropause are strongly correlated with neurodegeneration and cognitive decline. In this connection, much evidence now indicates that Alzheimer's disease (AD) involves aberrant re-entry of post-mitotic neurons into the cell cycle. Cell cycle abnormalities appear very early in the disease, prior to the appearance of plaques and tangles, and explain the biochemical, neuropathological and cognitive changes observed with disease progression. Intriguingly, a recent animal study has demonstrated that induction of adult neurogenesis results in the loss of previously encoded memories while decreasing neurogenesis after memory formation during infancy mitigated forgetting. Here we review the biochemical, epidemiological and clinical evidence that alterations in sex hormone signaling associated with menopause and andropause drive the aberrant re-entry of post-mitotic neurons into an abortive cell cycle that leads to neurite retraction, neuron dysfunction and neuron death. When the reproductive axis is in balance, gonadotropins such as luteinizing hormone (LH), and its fetal homolog, human chorionic gonadotropin (hCG), promote pluripotent human and totipotent murine embryonic stem cell and neuron proliferation. However, strong evidence supports menopausal/andropausal elevations in the LH:sex steroid ratio as driving aberrant mitotic events. These include the upregulation of tumor necrosis factor; amyloid-β precursor protein processing towards the production of mitogenic Aβ; and the activation of Cdk5, a key regulator of cell cycle progression and tau phosphorylation (a cardinal feature of both neurogenesis and neurodegeneration). Cognitive and biochemical studies confirm the negative consequences of a high LH:sex steroid ratio on dendritic spine density and human cognitive performance. Prospective epidemiological and clinical evidence in humans supports the premise that rebalancing the ratio of circulating gonadotropins:sex steroids reduces the incidence of AD. Together, these data support endocrine dyscrasia and the subsequent loss of cell cycle control as an important etiological event in the development of neurodegenerative diseases including AD, stroke and Parkinson's disease.
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Affiliation(s)
- Craig S Atwood
- Department of Medicine, University of Wisconsin-Madison School of Medicine and Public Health, Madison, WI 53705, USA; Geriatric Research, Education and Clinical Center, Veterans Administration Hospital, Madison, WI 53705, USA; School of Exercise, Biomedical and Health Sciences, Edith Cowan University, Joondalup, 6027 WA, Australia.
| | - Richard L Bowen
- OTB Research, 217 Calhoun St, Unit 1, Charleston, SC 29401, USA
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Kwon SS, Kim SY, Kong BJ, Kim KJ, Noh GY, Im NR, Lim JW, Ha JH, Kim J, Park SN. Cell penetrating peptide conjugated liposomes as transdermal delivery system of Polygonum aviculare L. extract. Int J Pharm 2015; 483:26-37. [PMID: 25623491 DOI: 10.1016/j.ijpharm.2015.01.030] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2014] [Revised: 12/31/2014] [Accepted: 01/18/2015] [Indexed: 01/01/2023]
Abstract
In this study, Polygonum aviculare L. extract, which has superior antioxidative and cellular membrane protective activity, was loaded onto cell penetrating peptide (CPP) conjugated liposomes to enhance transdermal delivery. The physical characteristics of typical liposomes and CPP-conjugated liposomes containing P. aviculare extract were evaluated. The particle sizes of both liposomes were approximately 150 nm. Whereas the zeta potential of typical liposomes was -45 mV, that of CPP-conjugated liposomes was +42 mV. The loading efficiency of P. aviculare extract in both liposomes was calculated to be about 83%. Fluorescent-labeled liposomes were prepared to evaluate cellular uptake and skin permeation efficiency. Using flow cytometry, we found that CPP-conjugated liposomes improved cellular uptake of the fluorescent dye as compared with the typical liposomes. In addition, the skin permeation of CPP-conjugated liposomes was proved higher than that of typical liposomes by confocal laser scanning microscopy studies and Franz diffusion cell experiments. The improved cellular uptake and skin permeation of the CPP-conjugated liposomes were due to the cationic arginine-rich peptide. In vivo studies also determined that the CPP-conjugated liposomes were more effective in depigmentation and anti-wrinkle studies than typical liposomes. These results indicate that the CPP-conjugated liposomes could be effective for transdermal drug delivery of antioxidant and anti-aging therapeutics.
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Affiliation(s)
- Soon Sik Kwon
- Department of Fine Chemistry, College of Nature and Life Science & Convergence Institute of Biomedical Engineering & Biomaterials, Seoul National University of Science and Technology, 232 Gongreung-ro, Nowon-gu, Seoul 139-743, South Korea
| | - Sun Young Kim
- Department of Fine Chemistry, College of Nature and Life Science & Convergence Institute of Biomedical Engineering & Biomaterials, Seoul National University of Science and Technology, 232 Gongreung-ro, Nowon-gu, Seoul 139-743, South Korea
| | - Bong Ju Kong
- Department of Fine Chemistry, College of Nature and Life Science & Convergence Institute of Biomedical Engineering & Biomaterials, Seoul National University of Science and Technology, 232 Gongreung-ro, Nowon-gu, Seoul 139-743, South Korea
| | - Kyeong Jin Kim
- Department of Fine Chemistry, College of Nature and Life Science & Convergence Institute of Biomedical Engineering & Biomaterials, Seoul National University of Science and Technology, 232 Gongreung-ro, Nowon-gu, Seoul 139-743, South Korea
| | - Geun Young Noh
- Department of Fine Chemistry, College of Nature and Life Science & Convergence Institute of Biomedical Engineering & Biomaterials, Seoul National University of Science and Technology, 232 Gongreung-ro, Nowon-gu, Seoul 139-743, South Korea
| | - Na Ri Im
- Department of Fine Chemistry, College of Nature and Life Science & Convergence Institute of Biomedical Engineering & Biomaterials, Seoul National University of Science and Technology, 232 Gongreung-ro, Nowon-gu, Seoul 139-743, South Korea
| | - Ji Won Lim
- Department of Fine Chemistry, College of Nature and Life Science & Convergence Institute of Biomedical Engineering & Biomaterials, Seoul National University of Science and Technology, 232 Gongreung-ro, Nowon-gu, Seoul 139-743, South Korea
| | - Ji Hoon Ha
- Department of Fine Chemistry, College of Nature and Life Science & Convergence Institute of Biomedical Engineering & Biomaterials, Seoul National University of Science and Technology, 232 Gongreung-ro, Nowon-gu, Seoul 139-743, South Korea
| | - Junoh Kim
- R&D Unit, AMOREPACIFIC Co., Yongin-Si, Gyeonggi-Do 446-729, South Korea.
| | - Soo Nam Park
- Department of Fine Chemistry, College of Nature and Life Science & Convergence Institute of Biomedical Engineering & Biomaterials, Seoul National University of Science and Technology, 232 Gongreung-ro, Nowon-gu, Seoul 139-743, South Korea.
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Daradkeh G, Essa MM, Al-Adawi SS, Koshy RP, Al-Asmi A, Waly MI. Nutritional status and cognitive impairment in elderly. Pak J Biol Sci 2014; 17:1098-1105. [PMID: 26027153 DOI: 10.3923/pjbs.2014.1098.1105] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The elderly population is increasing worldwide and it has been suggested that senior citizens will continue to constitute the bulk of the population in many countries. Nutritional status of senior citizens are adversely affected by their frailty, chronic condition and declining cognitive functioning. Conversely, malnourished elderly further deteriorate their frailty, chronic disease and cognitive functioning. The aim of this review article is to recognize the importance of nutritional assessment of elderly population particularly those with cognitive impairment. First part is to highlight characteristic cognitive impairment among senior citizens and the second one highlight t he background in which malnutrition is a factor that leads to increased risk of morbidity and mortality in the elderly. This review also highlight salgorithms for safeguarding nutritional status among senior citizen and focuses on importance of nutritional screening, assessment and early intervention for safeguarding further deterioration of elderly who are likely to prone to cognitive impairment.
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Kwon YH, Jang SH, Yeo SS. Age-related changes of lateral ventricular width and periventricular white matter in the human brain: a diffusion tensor imaging study. Neural Regen Res 2014; 9:986-9. [PMID: 25206922 PMCID: PMC4146227 DOI: 10.4103/1673-5374.133152] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/21/2014] [Indexed: 11/04/2022] Open
Affiliation(s)
- Yong Hyun Kwon
- Department of Physical Therapy, Yeungnam University College, Namgu, Daegu, Republic of Korea
| | - Sung Ho Jang
- Department of Physical Medicine and Rehabilitation, College of Medicine, Yeungnam University, Namgu, Daegu, Republic of Korea
| | - Sang Seok Yeo
- Department of Physical Therapy, College of Health Sciences, Dankook University, Dongnam-gu, Cheonan-si, Chungnam, Republic of Korea
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Abstract
The cellular prion protein (PrPC) has been widely investigated ever since its conformational isoform, the prion (or PrPSc), was identified as the etiological agent of prion disorders. The high homology shared by the PrPC-encoding gene among mammals, its high turnover rate and expression in every tissue strongly suggest that PrPC may possess key physiological functions. Therefore, defining PrPC roles, properties and fate in the physiology of mammalian cells would be fundamental to understand its pathological involvement in prion diseases. Since the incidence of these neurodegenerative disorders is enhanced in aging, understanding PrPC functions in this life phase may be of crucial importance. Indeed, a large body of evidence suggests that PrPC plays a neuroprotective and antioxidant role. Moreover, it has been suggested that PrPC is involved in Alzheimer disease, another neurodegenerative pathology that develops predominantly in the aging population. In prion diseases, PrPC function is likely lost upon protein aggregation occurring in the course of the disease. Additionally, the aging process may alter PrPC biochemical properties, thus influencing its propensity to convert into PrPSc. Both phenomena may contribute to the disease development and progression. In Alzheimer disease, PrPC has a controversial role because its presence seems to mediate β-amyloid toxicity, while its down-regulation correlates with neuronal death. The role of PrPC in aging has been investigated from different perspectives, often leading to contrasting results. The putative protein functions in aging have been studied in relation to memory, behavior and myelin maintenance. In aging mice, PrPC changes in subcellular localization and post-translational modifications have been explored in an attempt to relate them to different protein roles and propensity to convert into PrPSc. Here we provide an overview of the most relevant studies attempting to delineate PrPC functions and fate in aging.
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Affiliation(s)
- Lisa Gasperini
- Laboratory of Prion Biology, Department of Neuroscience, Scuola Internazionale Superiore di Studi Avanzati Trieste, Italy
| | - Giuseppe Legname
- Laboratory of Prion Biology, Department of Neuroscience, Scuola Internazionale Superiore di Studi Avanzati Trieste, Italy
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Bondke Persson A, Persson PB. The best years. Acta Physiol (Oxf) 2014; 211:539-40. [PMID: 24891299 DOI: 10.1111/apha.12318] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- A Bondke Persson
- Institute of Vegetative Physiology, Charité-Universitaetsmedizin Berlin, Berlin, Germany.
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Cai L, Chan JSY, Yan JH, Peng K. Brain plasticity and motor practice in cognitive aging. Front Aging Neurosci 2014; 6:31. [PMID: 24653695 PMCID: PMC3947993 DOI: 10.3389/fnagi.2014.00031] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2013] [Accepted: 02/18/2014] [Indexed: 12/02/2022] Open
Abstract
For more than two decades, there have been extensive studies of experience-based neural plasticity exploring effective applications of brain plasticity for cognitive and motor development. Research suggests that human brains continuously undergo structural reorganization and functional changes in response to stimulations or training. From a developmental point of view, the assumption of lifespan brain plasticity has been extended to older adults in terms of the benefits of cognitive training and physical therapy. To summarize recent developments, first, we introduce the concept of neural plasticity from a developmental perspective. Secondly, we note that motor learning often refers to deliberate practice and the resulting performance enhancement and adaptability. We discuss the close interplay between neural plasticity, motor learning and cognitive aging. Thirdly, we review research on motor skill acquisition in older adults with, and without, impairments relative to aging-related cognitive decline. Finally, to enhance future research and application, we highlight the implications of neural plasticity in skills learning and cognitive rehabilitation for the aging population.
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Affiliation(s)
- Liuyang Cai
- Department of Psychology, Tsinghua University Beijing, China
| | - John S Y Chan
- Department of Psychology, The Chinese University of Hong Kong Hong Kong, China
| | - Jin H Yan
- Department of Psychology, Tsinghua University Beijing, China ; Institute of Affective and Social Neuroscience, Shenzhen University Shenzhen, China
| | - Kaiping Peng
- Department of Psychology, Tsinghua University Beijing, China
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Affiliation(s)
- Myung Geun Shin
- Department of Laboratory Medicine, Medical School, Chonnam National University, Gwangju, Korea
- Center for Creative Biomedical Scientists, Chonnam National University, Gwangju, Korea
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Gazova I, Laczó J, Rubinova E, Mokrisova I, Hyncicova E, Andel R, Vyhnalek M, Sheardova K, Coulson EJ, Hort J. Spatial navigation in young versus older adults. Front Aging Neurosci 2013; 5:94. [PMID: 24391585 PMCID: PMC3867661 DOI: 10.3389/fnagi.2013.00094] [Citation(s) in RCA: 78] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2013] [Accepted: 12/02/2013] [Indexed: 11/13/2022] Open
Abstract
Older age is associated with changes in the brain, including the medial temporal lobe, which may result in mild spatial navigation deficits, especially in allocentric navigation. The aim of the study was to characterize the profile of real-space allocentric (world-centered, hippocampus-dependent) and egocentric (body-centered, parietal lobe dependent) navigation and learning in young vs. older adults, and to assess a possible influence of gender. We recruited healthy participants without cognitive deficits on standard neuropsychological testing, white matter lesions or pronounced hippocampal atrophy: 24 young participants (18-26 years old) and 44 older participants stratified as participants 60-70 years old (n = 24) and participants 71-84 years old (n = 20). All underwent spatial navigation testing in the real-space human analog of the Morris Water Maze, which has the advantage of assessing separately allocentric and egocentric navigation and learning. Of the eight consecutive trials, trials 2-8 were used to reduce bias by a rebound effect (more dramatic changes in performance between trials 1 and 2 relative to subsequent trials). The participants who were 71-84 years old (p < 0.001), but not those 60-70 years old, showed deficits in allocentric navigation compared to the young participants. There were no differences in egocentric navigation. All three groups showed spatial learning effect (p' s ≤ 0.01). There were no gender differences in spatial navigation and learning. Linear regression limited to older participants showed linear (β = 0.30, p = 0.045) and quadratic (β = 0.30, p = 0.046) effect of age on allocentric navigation. There was no effect of age on egocentric navigation. These results demonstrate that navigation deficits in older age may be limited to allocentric navigation, whereas egocentric navigation and learning may remain preserved. This specific pattern of spatial navigation impairment may help differentiate normal aging from prodromal Alzheimer's disease.
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Affiliation(s)
- Ivana Gazova
- Memory Clinic, Department of Neurology, 2nd Faculty of Medicine, Charles University in Prague and Motol University Hospital Prague, Czech Republic ; International Clinical Research Center, St. Anne's University Hospital Brno Brno, Czech Republic
| | - Jan Laczó
- Memory Clinic, Department of Neurology, 2nd Faculty of Medicine, Charles University in Prague and Motol University Hospital Prague, Czech Republic ; International Clinical Research Center, St. Anne's University Hospital Brno Brno, Czech Republic
| | - Eva Rubinova
- International Clinical Research Center, St. Anne's University Hospital Brno Brno, Czech Republic
| | - Ivana Mokrisova
- Memory Clinic, Department of Neurology, 2nd Faculty of Medicine, Charles University in Prague and Motol University Hospital Prague, Czech Republic ; International Clinical Research Center, St. Anne's University Hospital Brno Brno, Czech Republic
| | - Eva Hyncicova
- Memory Clinic, Department of Neurology, 2nd Faculty of Medicine, Charles University in Prague and Motol University Hospital Prague, Czech Republic
| | - Ross Andel
- International Clinical Research Center, St. Anne's University Hospital Brno Brno, Czech Republic ; School of Aging Studies, University of South Florida Tampa, FL, USA
| | - Martin Vyhnalek
- Memory Clinic, Department of Neurology, 2nd Faculty of Medicine, Charles University in Prague and Motol University Hospital Prague, Czech Republic ; International Clinical Research Center, St. Anne's University Hospital Brno Brno, Czech Republic
| | - Katerina Sheardova
- International Clinical Research Center, St. Anne's University Hospital Brno Brno, Czech Republic
| | - Elizabeth J Coulson
- Queensland Brain Institute, The University of Queensland Brisbane, QLD, Australia
| | - Jakub Hort
- Memory Clinic, Department of Neurology, 2nd Faculty of Medicine, Charles University in Prague and Motol University Hospital Prague, Czech Republic ; International Clinical Research Center, St. Anne's University Hospital Brno Brno, Czech Republic
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Ding XF, Yu SC, Chen BD, Lin SJ, Chang C, Li GH. Recent advances in the study of testicular nuclear receptor 4. J Zhejiang Univ Sci B 2013; 14:171-7. [PMID: 23463759 DOI: 10.1631/jzus.b1200357] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Testicular nuclear receptor 4 (TR4), also known as NR2C2 (nuclear receptor subfamily 2, group C, member 2), is a transcriptional factor and a member of the nuclear receptor family. TR4 was initially cloned from human and rat hypothalamus, prostate, and testes libraries. For almost two decades, its specific tissue distribution, genomic organization, and chromosomal assignment have been well investigated in humans and animals. However, it has been very difficult to study TR4's physiological functions due to a lack of specific ligands. Gene knock-out animal techniques provide an alternative approach for defining the biological functions of TR4. In vivo studies of TR4 gene knockout mice (TR4(-/-)) found that they display severe spinal curvature, subfertility, premature aging, and prostate prostatic intraepithelial neoplasia (PIN) development. Upstream modulators, downstream target gene regulation, feedback mechanisms, and differential modulation mediated by the recruitment of other nuclear receptors and coregulators have been identified in studies using the TR4(-/-) phenotype. With the establishment of a tissue-specific TR4(-/-) mouse model, research on TR4 will be more convenient in the future.
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Affiliation(s)
- Xian-fan Ding
- Department of Urology, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou, China
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Yonker JA, Chang V, Roetker NS, Hauser TS, Hauser RM, Atwood CS. Hypothalamic-pituitary-gonadal axis homeostasis predicts longevity. AGE (DORDRECHT, NETHERLANDS) 2013; 35:129-38. [PMID: 22139381 PMCID: PMC3543732 DOI: 10.1007/s11357-011-9342-1] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2011] [Accepted: 11/07/2011] [Indexed: 05/29/2023]
Abstract
The reproductive-cell cycle theory of aging posits that reproductive hormone changes associated with menopause and andropause drive senescence via altered cell cycle signaling. Using data from the Wisconsin Longitudinal Study (n = 5,034), we analyzed the relationship between longevity and menopause, including other factors that impact "ovarian lifespan" such as births, oophorectomy, and hormone replacement therapy. We found that later onset of menopause was associated with lower mortality, with and without adjusting for additional factors (years of education, smoking status, body mass index, and marital status). Each year of delayed menopause resulted in a 2.9% reduction in mortality; after including a number of additional controls, the effect was attenuated modestly but remained statistically significant (2.6% reduction in mortality). We also found that no other reproductive parameters assessed added to the prediction of longevity, suggesting that reproductive factors shown to affect longevity elsewhere may be mediated by age of menopause. Thus, surgical and natural menopause at age 40, for example, resulted in identical survival probabilities. These results support the maintenance of the hypothalamic-pituitary-gonadal axis in homeostasis in prolonging human longevity, which provides a coherent framework for understanding the relationship between reproduction and longevity.
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Affiliation(s)
- James A. Yonker
- />Department of Sociology, University of Wisconsin—Madison, Madison, WI USA
- />Center for Demography and Ecology, University of Wisconsin—Madison, Madison, WI USA
- />Center for Demography of Health and Aging, University of Wisconsin—Madison, Madison, WI USA
| | - Vicky Chang
- />Department of Sociology, University of Wisconsin—Madison, Madison, WI USA
- />Center for Demography and Ecology, University of Wisconsin—Madison, Madison, WI USA
- />Center for Demography of Health and Aging, University of Wisconsin—Madison, Madison, WI USA
| | - Nicholas S. Roetker
- />Department of Sociology, University of Wisconsin—Madison, Madison, WI USA
- />Center for Demography and Ecology, University of Wisconsin—Madison, Madison, WI USA
- />Center for Demography of Health and Aging, University of Wisconsin—Madison, Madison, WI USA
| | - Taissa S. Hauser
- />Department of Sociology, University of Wisconsin—Madison, Madison, WI USA
- />Center for Demography and Ecology, University of Wisconsin—Madison, Madison, WI USA
- />Center for Demography of Health and Aging, University of Wisconsin—Madison, Madison, WI USA
| | - Robert M. Hauser
- />Department of Sociology, University of Wisconsin—Madison, Madison, WI USA
- />Center for Demography and Ecology, University of Wisconsin—Madison, Madison, WI USA
- />Center for Demography of Health and Aging, University of Wisconsin—Madison, Madison, WI USA
| | - Craig S. Atwood
- />Geriatric Research, Education and Clinical Center, Veterans Administration Hospital, Madison, WI USA
- />Department of Medicine, University of Wisconsin—Madison School of Medicine and Public Health, Madison, WI USA
- />School of Exercise, Biomedical and Health Sciences, Edith Cowan University, Joondalup, WA Australia
- />Wm S. Middleton Memorial VA (GRECC 11G), University of Wisconsin—Madison Medical School, 2500 Overlook Terrace, Madison, WI 53705 USA
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McIntyre A, Mehta S, Aubut J, Dijkers M, Teasell RW. Mortality among older adults after a traumatic brain injury: a meta-analysis. Brain Inj 2012; 27:31-40. [PMID: 23163240 DOI: 10.3109/02699052.2012.700086] [Citation(s) in RCA: 110] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
PRIMARY OBJECTIVE To examine mortality rates among older adults (≥60 years) post-traumatic brain injury (TBI). RESEARCH DESIGN Systematic review and meta-analysis. METHODS AND PROCEDURES Using multiple databases, a literature search was conducted for articles on mortality after TBI published up to July 2011. Information on patient characteristics (age, Glasgow Coma Scale (GCS), injury aetiology, etc.), mortality rates, time to death and study design was extracted and pooled. MAIN OUTCOMES AND RESULTS Twenty-four studies had an overall mortality rate of 38.3% (CI 27.1-50.9%). The odds of mortality for those over 75 years compared to those of 65-74 years was 1.734 (CI = 1.311-2.292; p < 0.0001). Pooled mortality rates for mild (GCS 13-15), moderate (GCS 9-12) and severe (GCS 3-8) head injuries were 12.3% (CI = 6.1-23.3%), 34.3% (CI = 19.5-53.0%) and 65.3% (CI = 53.1-75.9), respectively. Odds ratios comparing severe to mild and moderate to mild head injuries were 12.69 (CI = 5.29-30.45; p < 0.0001) and 5.31 (CI = 3.41-8.29; p < 0.0001), respectively. There was no significant difference in the odds of death between severe and moderate injuries (p = 0.116). CONCLUSIONS These mortality rates associated with moderate and severe injuries may be attributed to complications, chronic disease prevalence, conservative management techniques or the consequences of biological ageing.
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Affiliation(s)
- Amanda McIntyre
- Lawson Health Research Institute, St. Joseph's Parkwood Hospital, London, ON, Canada
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Clark I, Atwood C, Bowen R, Paz-Filho G, Vissel B. Tumor necrosis factor-induced cerebral insulin resistance in Alzheimer's disease links numerous treatment rationales. Pharmacol Rev 2012; 64:1004-26. [PMID: 22966039 DOI: 10.1124/pr.112.005850] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
The evident limitations of the amyloid theory of the pathogenesis of Alzheimer's disease are increasingly putting alternatives in the spotlight. We argue here that a number of independently developing approaches to therapy-including specific and nonspecific anti-tumor necrosis factor (TNF) agents, apolipoprotein E mimetics, leptin, intranasal insulin, the glucagon-like peptide-1 mimetics and glycogen synthase kinase-3 (GSK-3) antagonists-are all part of an interlocking chain of events. All these approaches inform us that inflammation and thence cerebral insulin resistance constitute the pathway on which to focus for a successful clinical outcome in treating this disease. The key link in this chain presently absent is a recognition by Alzheimer's research community of the long-neglected history of TNF induction of insulin resistance. When this is incorporated into the bigger picture, it becomes evident that the interventions we discuss are not competing alternatives but equally valid approaches to correcting different parts of the same pathway to Alzheimer's disease. These treatments can be expected to be at least additive, and conceivably synergistic, in effect. Thus the inflammation, insulin resistance, GSK-3, and mitochondrial dysfunction hypotheses are not opposing ideas but stages of the same fundamental, overarching, pathway of Alzheimer's disease pathogenesis. The insight this provides into progenitor cells, including those involved in adult neurogenesis, is a key part of this approach. This pathway also has therapeutic implications for other circumstances in which brain TNF is pathologically increased, such as stroke, traumatic brain injury, and the infectious disease encephalopathies.
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Affiliation(s)
- Ian Clark
- Division of Medical Science and Biochemistry, Research School of Biology, Australian National University, Canberra ACT, Australia.
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Carney Almroth B, Sköld M, Nilsson Sköld H. Gender differences in health and aging of Atlantic cod subject to size selective fishery. Biol Open 2012; 1:922-8. [PMID: 23213487 PMCID: PMC3507242 DOI: 10.1242/bio.20121446] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2012] [Accepted: 06/13/2012] [Indexed: 11/20/2022] Open
Abstract
We have analyzed health and physiological aging parameters in male and female Atlantic cod, Gadus morhua, captured in Kattegat, Skagerrak and in Öresund. Gender differences were clearly evident in a number of variables. Males had longer liver telomeres and higher catalase activities than females, while females had higher superoxide dismutase activity, liver somatic index and condition factor. Effects of age were found for males where levels of the antioxidant glutathione and telomere length declined with age, indicating physiological aging. Liver somatic index increased and percentage oxidized glutathione decreased with age. Between-site comparisons of males show that percentage oxidized glutathione and catalase were lowest in Kattegat, whereas protein carbonyls and condition factor were higher in Skagerrak. Females, on the other hand, showed no differences between sites or indications of somatic aging or age-related effects in egg quality, indicating that older and larger female cod are healthy and show no changes in eggs with age. In contrast, males showed indications of physiological aging and lower condition than females. The results emphasize the importance of conserving old mature fish, in particular high egg-productive females, when managing fisheries.
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Affiliation(s)
- Bethanie Carney Almroth
- University of Gothenburg, Department of Biological and Environmental Sciences - Zoology , Box 463, SE 405 30 Göteborg , Sweden
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RNA-Seq and human complex diseases: recent accomplishments and future perspectives. Eur J Hum Genet 2012; 21:134-42. [PMID: 22739340 DOI: 10.1038/ejhg.2012.129] [Citation(s) in RCA: 151] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
The availability of the human genome sequence has allowed identification of disease-causing mutations in many Mendelian disorders, and detection of significant associations of nucleotide polymorphisms to complex diseases and traits. Despite these progresses, finding the causative variations for most of the common diseases remains a complex task. Several studies have shown gene expression analyses provide a quite unbiased way to investigate complex traits and common disorders' pathogenesis. Therefore, whole-transcriptome analysis is increasingly acquiring a key role in the knowledge of mechanisms responsible for complex diseases. Hybridization- and tag-based technologies have elucidated the involvement of multiple genes and pathways in pathological conditions, providing insights into the expression of thousand of coding and noncoding RNAs, such as microRNAs. However, the introduction of Next-Generation Sequencing, particularly of RNA-Seq, has overcome some drawbacks of previously used technologies. Identifying, in a single experiment, potentially novel genes/exons and splice isoforms, RNA editing, fusion transcripts and allele-specific expression are some of its advantages. RNA-Seq has been fruitfully applied to study cancer and host-pathogens interactions, and it is taking first steps for studying neurodegenerative diseases (ND) as well as neuropsychiatric diseases. In addition, it is emerging as a very powerful tool to study quantitative trait loci associated with gene expression in complex diseases. This paper provides an overview on gene expression profiling of complex diseases, with emphasis on RNA-Seq, its advantages over conventional technologies for studying cancer and ND, and for linking nucleotide variations to gene expression changes, also discussing its limitations.
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Abstract
A number of leading theories of aging, namely The Antagonistic Pleiotropy Theory (Williams, 1957), The Disposable Soma Theory (Kirkwood, 1977) and most recently The Reproductive-Cell Cycle Theory (Bowen and Atwood, 2004, 2010) suggest a tradeoff between longevity and reproduction. While there has been an abundance of data linking longevity with reduced fertility in lower life forms, human data have been conflicting. We assessed this tradeoff in a cohort of genetically and socially homogenous Ashkenazi Jewish centenarians (average age ~100 years). As compared with an Ashkenazi cohort without exceptional longevity, our centenarians had fewer children (2.01 vs 2.53, p<0.0001), were older at first childbirth (28.0 vs 25.6, p<0.0001), and at last childbirth (32.4 vs 30.3, p<0.0001). The smaller number of children was observed for male and female centenarians alike. The lower number of children in both genders together with the pattern of delayed reproductive maturity is suggestive of constitutional factors that might enhance human life span at the expense of reduced reproductive ability.
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