factors affecting aging process pdf
Huls A, et al. Bennet AM, Di Angelantonio E, Ye Z, Wensley F, Dahlin A, Ahlbom A, Keavney B, Collins R, Wiman B, de Faire U, Danesh J. Taimen P, Pfleghaar K, Shimi T, Moller D, Ben-Harush K, Erdos MR, Adam SA, Herrmann H, Medalia O, Collins FS, Goldman AE, Goldman RD. Gonzalez-Suarez I, Redwood AB, Gonzalo S. Loss of A-type lamins and genomic instability. In contrast, three studies assigned grades to their target outcome, then calculated a final score from the assigned grades by applying a formula3436. Willcox BJ, Donlon TA, He Q, Chen R, Grove JS, Yano K, Masaki KH, Willcox DC, Rodriguez B, Curb JD. . For increased wrinkling, significant associations were found with AQI48,49, cooking with solid fuels leading to indoor pollution55, ozone56, PM2.553, PM1054, soot54, and traffic-associated particles54. However, these studies have yet to be reviewed. Airborne particle exposure and extrinsic skin aging. These factors were able to explain 51.9%. Association of telomere length with type 2 diabetes, oxidative stress and UCP2 gene variation. 5d). [92]. Thus, literature cited by eligible articles from the initial search were retrieved and screened; this citation screening process constituted a secondary literature search. What controls the length of life? The best example of DNA damage as a cause of aging are the progeroid syndromes, which are caused by a deficiency in the mechanisms involved in DNA repair and whose symptoms begin early in life[5, 6]. Model 3 and 4: Ernster et al.36 adjusted for age, BMI, and smoking status. Air pollution and the skin. Approach B-1: Understand the basic behavioral, social, and psychological aspects of aging. Parnaik VK, Manju K. Laminopathies: multiple disorders arising from defects in nuclear architecture. Americans age 65 years and over comprise nearly 13% of the U.S. population (U. S. Census Bureau, 2010). Finally, a significant association found for wrinkling and current smoking (pOR 3.21, 95% CI 1.56, 6.58), with non-significant heterogeneity (I2=49.00%, p=0.141) (see Fig. Griffiths CE, Wang TS, Hamilton TA, Voorhees JJ, Ellis CN. Association between dietary intake of n-3 polyunsaturated fatty acids and severity of skin photoaging in a middle-aged Caucasian population. The pathways that involve DNA sequence alterations in somatic stem cell aging are still unclear, but these findings raise the possibility that telomere length or deficiencies in DNA repair systems could be part of these routes. Drakaki E, Dessinioti C, Antoniou CV. Twin studies show the impact of hereditary factors in lifespan variation [21, 22], which concur with the wide range of genetic variants involved in aging and age-related diseases described in genome association studies in centenarians[23]. government site. Considering the variety of skin aging definitions in the literature, this review has proposed standard definition of skin aging. Indeed, a comparison between Chinese and French females showed that increased dyspigmentation occurred more frequently in the Chinese than French, and Chinese females exhibit a marked progression in wrinkling severity at a later age than French females43. 4). Stress and subjective age: Those with greater financial stress look older. Evaluation of skin microtopography as a measure of ultraviolet exposure. VC received a Formacin de Profesorado Universitario Spanish Research Programme Fellowship. Instead, the critical factor is the length of time during which events occur that are injurious to the body and its cells. Besides examining risk factors with established significant associations with skin aging, we have also put forward some associations that deserve closer scrutiny. Dillin A, Hsu AL, Arantes-Oliveira N, Lehrer-Graiwer J, Hsin H, Fraser AG, Kamath RS, Ahringer J, Kenyon C. Rates of behavior and aging specified by mitochondrial function during development. These changes start from birthone grows, develops and attains maturity. Dobos G, et al. As the percentage of older Americans rises, so does concern for their economic stability. For discrete outcomes (e.g., seborrheic keratosis), studies assessed subjects by determining presence or absence (n=14), counting the number of occurrences (n=10), or both counting, then assigning a grade according to the frequency of outcome (n=8). Factors affecting aging process - Age Aging is a natural process. Significant associations were found for facial lentigines (pOR 1.08, 95% CI 1.05, 1.11), higher SSM score (pOR 1.15, 95% CI 1.12, 1.18), telangiectasia (pOR 1.37, 95% CI 1.09, 1.73), and wrinkling (pOR 3.96, 95% CI 1.75, 8.96). Fraga MF, Esteller M. Epigenetics and aging: the targets and the marks. These prevailing attitudes lead to a denial of the signs of aging. Time of our lives. Aging is characterized by a progressive decline in physical, mental, and reproductive capacity, as well as an increase in morbidity and mortality. Huls A, Sugiri D, Fuks K, Krutmann J, Schikowski T. Lentigine formation in Caucasian women-interaction between particulate matter and solar UVR. The repetitive DNA at chromosome ends shortens with age, as observed in fibroblasts, lymphocytes, and hematopoietic stem cells (HSC) [11]. FOIA Melendez A, Talloczy Z, Seaman M, Eskelinen EL, Hall DH, Levine B. Autophagy genes are essential for dauer development and life-span extension in C. elegans. A principal factor in aging is an exponential increase in incidence and mortality rates of cancer and non-cancerous diseases, as well progressive tissue degeneration and atrophy, caused by a decrease in adult or somatic stem cell function [4]. Aging is a process characterized by the progressive loss of tissue and organ function. conceived and supervised the current review. Axelsson J, et al. However, the concept of skin aging as a superimposition of skin changes induced by both chronologic and environmental factors was only introduced later, after 19832,3. Extrinsic factors are . Previous studies also found that good sleep was associated with lower SCINEXA intrinsic aging score27 (Supplementary Dataset), while sleep deprivation led to a less healthy and less attractive appearance85. Patients with these conditions, including Cockayne syndrome, Fanconi anemia, Werner, Bloom, Rothmund-Thomson and Hutchinson-Gilford syndromes, xeroderma pigmentosum and ataxia-telangiectasia, develop features of accelerated aging caused by mutations in genes implicated in genetic stability (Table 1). Skin aging and photoaging: An overview. Rather than one single causative factor, a range of environmental, demographic, biological, behavioral and social factors . Although analyses of these long-lived populations have allowed the identification of loci that could be associated with a better chance of living longer, additional studies are needed to confirm these associations. Genetic alterations associated to premature aging phenotypes. Werner syndrome (WS) is an autosomal recessive progeroid syndrome caused by mutation at WRN, a member of the RecQ helicase family [51], involved in DNA repair systems and replication [5254]. Search results were restricted to English journal articles published between 1990 and 2020. We thank C. Mark for editorial assistance. official website and that any information you provide is encrypted Purba MB, et al. Nonetheless, there was a doseresponse relationship between pack-years of smoking and wrinkling, across four studies, where an increase in number of pack-years of smoking resulted in a stronger association with wrinkling manifestation (Fig. Examples include the genetic variation in APOE and PCDH11X, associated with Alzheimers disease (AD) [93, 94]. The nuclear envelope, a key structure in cellular integrity and gene expression. Moreover, the 4 allele appears to be associated with risk of developing the familiar and sporadic forms of AD, and 4 carriers showed symptoms of the disease at younger ages [97, 98]. In this article, skin aging is defined simply as changes to the skin that occur due to aging. Circulating GH activates the GH receptor (GHR); this in turn leads to secretion of IGF-1, which binds the IGF-1 receptor (IGF-1R) on target cells, triggering cell growth and survival [85]. Funnel plots, often asymmetrical, and Eggers test p-values indicated that there was often significant publication bias across all outcomes (Supplementary Figs. Several animal models of progerias have confirmed the effect of a single genetic alteration on the mechanisms of aging. Emotional function how well you interpret and respond to emotions (both pleasant and . The https:// ensures that you are connecting to the For example, mutation in the gene that encodes the oxidative stress response protein p66shc, which prolongs life and protects from a variety of aging-associated diseases in mice, enhances resistance to apoptosis following oxidative stress in vitro-cultured cells [7]. It is necessary to establish family planning policy and program plans targeting both men and women, and participation of religious and community leaders is considered important in the establishment process. Forest plot for skin aging phenotypes and age as a continuous variable. Guyuron B, et al. Dryness has been quantified by skin conductance measured using Skicon-20087, while biopsies could permit better quantitative analyses of skin aging via the staining of elastotic tissue88, or histologic study2. Gandini S, et al. To avoid possible overlap of study populations and inclusion of duplicate results in the meta-analytic models, each study was only represented once for a given outcome, unless effect sizes reported were for stratified populations. What factors affect the aging process? Only one study used an index to quantify the general dietary intake63. Text definitions, photographs, or both, were provided as scale references and served as a direct measure of target outcomes. Cao C, Xiao Z, Wu Y, Ge C. Diet and skin aging-from the perspective of food nutrition. Kirkwood TB. Rodriguez S, Eriksson M. Evidence for the involvement of lamins in aging. There was a preponderance of cosmetic industry funding and frequent focus on the visuals of skin aging in studies presently reviewed. Non-modifiable risk factors are associated with intrinsic skin aging and cannot be altered, such as age and gender. Trojahn C, Dobos G, Lichterfeld A, Blume-Peytavi U, Kottner J. Characterizing facial skin ageing in humans: Disentangling extrinsic from intrinsic biological phenomena. Everyone must undergo this phase of life at his or her own time and pace. The narrowest sample age range reported was 1315 years19 and the widest was 1896 years20, with the youngest subject aged one18 and the oldest aged 101 years21. Wyllie FS, Jones CJ, Skinner JW, Haughton MF, Wallis C, Wynford-Thomas D, Faragher RG, Kipling D. Telomerase prevents the accelerated cell ageing of Werner syndrome fibroblasts. Pooled associations with male gender were obtained for lentigines (pOR 1.26, 95% CI 0.95, 1.67), higher SSM score (pOR 2.48, 95% CI 1.76, 3.49), telangiectasia (pOR 3.86, 95% CI 1.03, 14.49) and wrinkling (pOR 1.25, 95% CI 0.84, 1.88). Blackburn EH, Greider CW, Szostak JW. Ashcroft GS, Mills SJ, Ashworth JJ. Results from the first National Health and Nutrition Examination Survey, 19711974. Engel A, Johnson ML, Haynes SG. The factors influencing healthy aging were depression, leisure activities, perceived health status, ego integrity, and self-achievements. Additionally, we observed repeated usage of the Beagley-Gibson photonumeric scale for skin surface microtopography (SSM), wherein a higher score indicated a greater degree of skin aging26. Truncated lamins caused nuclear anomalies compatible with the HGPS phenotype [6773]. Rojas-Cartagena C, Flores I, Appleyard CB. The other authors declare no other competing interests. Vascular basis for brain degeneration: faltering controls and risk factors for dementia. We aimed to obtain a broad overview of the epidemiology of skin aging; hence, all participant subjects available in the literature were considered. Some studies examined specific races or genders, while others were nationwide cohort studies (e.g., NHANES). Pawlikowska L, Hu D, Huntsman S, Sung A, Chu C, Chen J, Joyner AH, Schork NJ, Hsueh WC, Reiner AP, Psaty BM, Atzmon G, Barzilai N, Cummings SR, Browner WS, Kwok PY, Ziv E. Association of common genetic variation in the insulin/IGF1 signaling pathway with human longevity. Carter CS, Ramsey MM, Sonntag WE. Common and atypical naevi. conducted the literature review, collated and analysed the data, and wrote the manuscript. Use a separate document and upload when done. Skin wrinkling: Can food make a difference? Studies used grading scales (n=68) which were often ordinal wherein higher score values indicated greater severity of skin aging outcome. Federal government websites often end in .gov or .mil. Bloom syndrome is a rare hereditary disease characterized by short stature, telangiectasia (tiny blood vessels dilated facial) facial photosensitivity (increased sensitivity to light), and increased susceptibility to tumors. Evaluation of skin ageing: A systematic review of clinical scales. Selection on alleles affecting human longevity and late-life disease: the example of apolipoprotein E. Lewis BP, Burge CB, Bartel DP. Elaborations on pollutant interactions and mechanistic evidence for skin aging and air pollution (e.g., dyspigmentation and particulate matter; wrinkling and ozone) have been reviewed elsewhere9,10,5860. Received 2021 Jun 8; Accepted 2021 Oct 27. Dobos G, Lichterfeld A, Blume-Peytavi U, Kottner J. Freckles and solar lentigines have different risk factors in Caucasian women. Telomeres and telomerase: the path from maize, Tetrahymena and yeast to human cancer and aging. An epidemiological survey of skin damage on the dorsal hand in rural populations in northern and southern China. A large number of genome-wide case-control association studies have identified many genetic variants linked to age-related diseases. Moreover, since skin aging comprised multiple phenotypes and risk factor exposures were categorised differently between studies, the number of associations obtained by this review for a given skin aging sign and corresponding risk factor were relatively low. Bhatt N, Agrawal S, Mehta K. Risk factors and self-perception for facial aging among Nepalese population. An official website of the United States government. Prevalence and determinants for xerosis cutis in the middle-aged and elderly population: A cross-sectional study. The p66shc adaptor protein controls oxidative stress response and life span in mammals. However, phenotypes considered as skin aging signs or used as measures of skin aging were found to differ between studies. Identification of genes and mutations responsible for progeroid syndromes (age-related monogenic hereditary disorders) [20] will help to establish the function of a specific genotype in an individuals lifespan. MIDLIFE FACTORS THAT INFLUENCE THE AGING PROCESS: AN INDIAN PERSPECTIVE December 2017 DOI: Authors: Seema Puri University of Delhi Majida Shaheen University of Delhi D H Pai Panandiker R Sinha. The contribution of solar UV exposure to skin aging, resulting in a phenotype termed as photoaging has been established5,6,20. Conserved seed pairing, often flanked by adenosines, indicates that thousands of human genes are microRNA targets. The authors divided the searching process into three phases, namely identification, screening, and eligibility. Larizza L, Roversi G, Volpi L. Rothmund-Thomson syndrome. This review was limited to visible measures of skin aging outcomes, entailing the exclusion of instrumental measurement and biopsy staining methods, which could provide a more accurate measure of phenotype. Certain sirtuins regulate glucose and fat metabolism in mammals [44, 45] by enhancing mitochondrial biogenesis in liver and muscle through the transcriptional coactivator peroxisome proliferator-activator receptor- coactivator 1 (PGC-1) [45]; they also govern cell survival by reducing p53 tumor suppressor activity [46, 47]. Otherwise, significant factors were reported in this review. The great variability in longevity between individuals of the same species suggests that the aging process is profoundly affected by processes that lead to the accumulation of errors that damage repair systems and compromise stem cell function. Study populations originated from 16 countries (Supplementary Table 2). Common conditions in older age include hearing loss, cataracts and refractive errors, back and neck pain and osteoarthritis, chronic obstructive pulmonary disease, diabetes, depression and dementia. 5a). Vierkotter A, et al. Smith J. Although no pooled odds ratio was available for menopausal status and skin aging, individual studies have previously reported a significant association for postmenopausal status with photoaging (OR 1.5, 95% CI 1.2, 1.8)41, and no significant association with wrinkling (OR 5.00, 95% CI 0.37, 67.66)25. 1 was sufficiently thorough. Larnier C, et al. 1. Interestingly, photoaging, often attributed to sun exposure, was not always significantly associated with sun exposure (Supplementary Table 6). Some individuals quit celebrating birthdays after a certain age. Flament F, Amar D, Forichon M, Caron J, Negre C. Distinct Habits of sun exposures lead to different impacts on some facial signs of Chinese men of different ages. As for other segmental aging syndromes, its clinical signs include precocious aging in early childhood with reduced life expectancy; patients do not usually reach adolescence [62]. The categorisation of skin colour and the corresponding associations with skin aging differed between studies (Supplementary Dataset). 6a, Model 2). Kimlin MG, Guo Y. Assessing the impacts of lifetime sun exposure on skin damage and skin aging using a non-invasive method. With reference to the former, changes to the skin may be categorised as, but not limited to the following: histological, morphological, and physiological. Where overlapping study subjects were concerned, only the larger study was considered. 8600 Rockville Pike Nouveau-Richard S, et al. Association of apolipoprotein E genotypes with lipid levels and coronary risk. Agrigoroaei S, Lee-Attardo A, Lachman ME. The hand-search process was repeated for results from the secondary search to ensure a thorough record was obtained (see Fig. Skin aging was also assessed as an outcome comprising a collection of phenotypes (n=7): overall skin aging using SCINEXA27, perceived age28,29, or photoaging20,3032. Castelo-Branco C, Figueras F, Martnez de Osaba MJ, Vanrell JA. Another study also found that sleep deprivation led to a perceived increase in facial signs, including hanging eyelids and wrinkling86. Where odds ratios were reported, meta-analyses were conducted using the random effects model. DerSimonian R, Laird N. Meta-analysis in clinical trials. The oxidative stress theory of aging is based on the hypothesis that age-associated functional losses are due to the accumulation of RONS-induced damages. FOXO3A genotype is strongly associated with human longevity. Middle age is the time when people notice the age-related changes like greying of hair . A related protective factor, sunscreen use, was significantly associated with wrinkling (pOR 0.50, 95% CI 0.25, 0.98) with non-significant heterogeneity (I2=0.00%, p=0.387). Thus, skin aging may be categorised as intrinsic or extrinsic, depending on the epidemiological factors affecting the skin aging process, . Where possible, adjusted effect sizes were preferred to non-adjusted ones. Orren DK. Flament F, et al. Epigenetic transgenerational actions of endocrine disruptors and male fertility. Financial stress has been found to result in older perceived age83, while the mechanistic and phenotypic effects of stress on the skin have been reviewed, a possible link to older looks has been suggested84. Regardless of a country's degree of development, the share of the population aged 60 or over is predicted to rise. Meta-analyses were conducted on R with the RStudio interface14, using the metafor package15. Motor function how well you make and control movements, including balance. Additionally, quality assessments of included studies were performed using JBI critical appraisal tools13. AgeAgecutter-A New Way to Age HOME Effect of age, gender, and sun exposure on ethnic skin photoaging: Evidence gathered using a new photonumeric scale. The online version contains supplementary material available at 10.1038/s41598-021-01573-z. Henis-Korenblit S, Zhang P, Hansen M, McCormick M, Lee SJ, Cary M, Kenyon C. Insulin/IGF-1 signaling mutants reprogram ER stress response regulators to promote longevity. Notably, although the protective effect of HRT on wrinkling was previously reported25,35, the pooled association for wrinkling and HRT use was non-significant. Characteristics of Framingham offspring participants with long-lived parents. Specific gene combinations (genotypes) determine lifespan: remarkable changes in duration are observed as a result of alteration in a single gene, as in human progeroid syndromes [20]. The higher frequency in Ashkenazi Jewish population s is due to a founder effect; approximately 1% of them are heterozygous carriers of the LMAsh mutation (a six nucleotide deletion and a seven nucleotide insertion at position 2281 of the cDNA) [77]. Model 1 and 2: Ernster et al.36 excluded from models. The determinants of periorbital skin ageing in participants of a melanoma case-control study in the U.K. Yin L, Morita A, Tsuji T. Skin aging induced by ultraviolet exposure and tobacco smoking: evidence from epidemiological and molecular studies. Current understanding of biological aging implies that some aging-associated changes are programmed, whereas others are random and not predictable. Notably, the most important skin aging phenotype was wrinkling, which was frequently used as an indicator of skin aging and a constituent of both validated and non-validated scales in the literature. Beggs funnel plots and Eggers test were used to assess publication bias; Eggers test was only performed for meta-analysis of more than 2 studies. Agherbi H, Gaussmann-Wenger A, Verthuy C, Chasson L, Serrano M, Djabali M. Polycomb mediated epigenetic silencing and replication timing at the INK4a/ARF locus during senescence. In families whose members show exceptional longevity, in addition to other environmental factors, family habits (lifestyle, nutrition) were thought to influence survival, although data are limited on the contribution of these factors to greater resistance to disease [81]. The older adult population is rapidly growing worldwide. Explain the ways in which ageism impacts older adults and everyone. Ageing is a process in which both intrinsic and extrinsic determinants lead progressively to a loss of structural integrity and physiological function [1]. Indeed, the unequal distribution of subjects within each age range in Vierktter et al.46 likely affected the studys findings. The first consists of genes with activity in the mitochondrial electron transport chain, such as clk-1 [27] and isp-1 [28], whose mutation moderately reduces oxidative phosphorylation capacity and prolongs life in worms [29]; these mutations established the first link between energy metabolism and longevity.
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factors affecting aging process pdf
