The Journals of Gerontology Series A Biological Sciences and Medical Sciences Impact Factor & Information

Publisher: Gerontological Society of America, Oxford University Press (OUP)

Journal description

The Journals of Gerontology were the first journals on aging published in the United States. The tradition of excellence in these peer-reviewed scientific journals, established in 1946, continues today. The Journals of Gerontology Series A publishes within its covers the Journal of Gerontology: Biological Sciences and the Journal of Gerontology: Medical Sciences. JOURNAL OF GERONTOLOGY: BIOLOGICAL SCIENCES: Publishes articles on the biological aspects of aging in areas such as biochemistry, biodemography, cellular and molecular biology, comparative and evolutionary biology, endocrinology, exercise sciences, genetics, immunology, morphology, neuroscience, nutrition, pathology, pharmacology, physiology, vertebrate and invertebrate genetics, and biological underpinnings of late life diseases. JOURNAL OF GERONTOLOGY: MEDICAL SCIENCES: Publishes articles representing the full range of medical sciences pertaining to aging. Appropriate areas include, but are not limited to, basic medical science, clinical epidemiology, clinical research, and health services research for professions such as medicine, dentistry, allied health sciences, and nursing. It publishes articles on research pertinent to human biology and disease. The following types of articles are published: 1) articles reporting original research; 2) rapid communications; 3) review articles; 4) guest editorials.

Current impact factor: 5.42

Impact Factor Rankings

2015 Impact Factor Available summer 2016
2014 Impact Factor 5.416
2013 Impact Factor 4.984
2012 Impact Factor 4.314
2011 Impact Factor 4.598
2010 Impact Factor 3.988
2009 Impact Factor 3.083
2008 Impact Factor 4.003
2007 Impact Factor 2.932
2006 Impact Factor 2.861
2005 Impact Factor 3.5
2004 Impact Factor 4.122
2003 Impact Factor 4.369
2002 Impact Factor 3.455
2001 Impact Factor 1.898
2000 Impact Factor 1.549
1999 Impact Factor 1.222
1998 Impact Factor 1.127
1997 Impact Factor 1.695
1996 Impact Factor 1.072

Impact factor over time

Impact factor

Additional details

5-year impact 5.41
Cited half-life 8.40
Immediacy index 1.41
Eigenfactor 0.02
Article influence 1.66
Website Journals of Gerontology Series A: Biological and Medical Sciences website
Other titles Journal of gerontology., Biological sciences., Journal of gerontology., Medical sciences., The journals of gerontology. Series A, Biological sciences and medical sciences, Biological sciences and medical sciences
ISSN 1079-5006
OCLC 31425404
Material type Periodical, Internet resource
Document type Journal / Magazine / Newspaper, Internet Resource

Publisher details

Oxford University Press (OUP)

  • Pre-print
    • Author can archive a pre-print version
  • Post-print
    • Author cannot archive a post-print version
  • Restrictions
    • 12 months embargo
  • Conditions
    • Pre-print can only be posted prior to acceptance
    • Pre-print must be accompanied by set statement (see link)
    • Pre-print must not be replaced with post-print, instead a link to published version with amended set statement should be made
    • Pre-print on author's personal website, employer website, free public server or pre-prints in subject area
    • Post-print in Institutional repositories or Central repositories
    • Publisher's version/PDF cannot be used
    • Published source must be acknowledged
    • Must link to publisher version
    • Set phrase to accompany archived copy (see policy)
    • Eligible authors may deposit in OpenDepot
    • The publisher will deposit in PubMed Central on behalf of NIH authors
    • Publisher last contacted on 19/02/2015
    • This policy is an exception to the default policies of 'Oxford University Press (OUP)'
  • Classification

Publications in this journal

  • Nicole Janssen · Evelyna Derhovanessian · Ilja Demuth · Fadel Arnaout · Elisabeth Steinhagen-Thiessen · Graham Pawelec ·
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    ABSTRACT: Toll-like receptor 4 (TLR-4) plays a crucial role in the pathophysiology of several age-related diseases. Although poorer function of circulating myeloid dendritic cells (mDCs) has been reported in the elderly, data on TLR-4 function in these cells in older people are lacking. Here, we investigated TLR-4 functionality in the elderly by ex vivo analysis of cytokine production of mDCs in response to LPS in 39 younger (23-34 years) and 61 older (62-77 years) healthy people using flow cytometry. We matched these subjects for Cytomegalovirus (CMV)-serostatus because a latent infection with this ubiquitous herpesvirus is known to affect numerous immune parameters. We found that TLR-4-dependent production of IL-6 and TNF was strongly stimulated in circulating mDCs from the elderly. However, mDCs of more than half of the young donors failed to respond in the same way. This was related to their already highly activated ex vivo state, predominantly observed in CMV-seropositive young donors and associated with lower CMV-specific IgG titres. This may reflect an increasingly important requirement for control of CMV infection throughout life. These data suggest that TLR-4 agonists may be the adjuvants of choice for elderly people, most of whom are CMV-positive, and whose responses to immunization are frequently impaired.
    The Journals of Gerontology Series A Biological Sciences and Medical Sciences 11/2015; DOI:10.1093/gerona/glv119
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    ABSTRACT: As the population of the Western world is aging, there is increasing awareness of age-related impairments in cognitive function and a rising interest in finding novel approaches to preserve cerebral health. A special collection of articles in The Journals of Gerontology: Biological Sciences and Medical Sciences brings together information of different aspects of brain aging, from latest developments in the field of neurodegenerative disorders to cerebral microvascular mechanisms of cognitive decline. It is emphasized that although the cellular changes that occur within aging neurons have been widely studied, more research is required as new signaling pathways are discovered that can potentially protect cells. New avenues for research targeting cellular senescence, epigenetics, and endocrine mechanisms of brain aging are also discussed. Based on the current literature it is clear that understanding brain aging and reducing risk for neurological disease with age requires searching for mechanisms and treatment options beyond the age-related changes in neuronal function. Thus, comprehensive approaches need to be developed that address the multiple, interrelated mechanisms of brain aging. Attention is brought to the importance of maintenance of cerebromicrovascular health, restoring neuroendocrine balance, and the pressing need for funding more innovative research into the interactions of neuronal, neuroendocrine, inflammatory and microvascular mechanisms of cognitive impairment, and Alzheimer's disease.
    The Journals of Gerontology Series A Biological Sciences and Medical Sciences 11/2015; DOI:10.1093/gerona/glv206
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    ABSTRACT: Background: We investigated the combined impact of abdominal obesity and low skeletal muscle mass on cardiovascular and total mortality in an elderly Asian population. Methods: A total of 1,485 elderly individuals (≥65 years) from Elderly Nutrition and Health Survey in Taiwan (1999-2000) were enrolled, and their survival status was followed using data from the National Death Registry. Skeletal muscle mass index (SMMI) was calculated by dividing skeletal muscle mass (kg) by height squared (m(2)). Low skeletal muscle mass was defined as the first quartile of SMMI. Abdominal obesity (high triglycerides plus waist circumference [HTGWC]) was defined as triglycerides ≥150mg/dL and waist circumference ≥90cm (men) and ≥80cm (women). The Cox proportional hazard model was used to evaluate the combined impact of abdominal obesity and low SMMI on cardiovascular and total mortality. Results: During follow-up (median 9.2 years), one third (n = 493) of subjects died from any cause, of which 34% (n = 168) were cardiovascular-related. Total and cardiovascular mortality were 4.2 and 1.4 per 100 person-years, respectively. Low SMMI and HTGWC were independently associated with total mortality in men, but only low SMMI was significantly associated in women. Those with both HTGWC and low SMMI had the highest mortality risk, with the cardiovascular mortality risk increased by >6.8-fold and 3.2-fold in men and women, respectively, compared with controls having normal SMMI and TGWC. Conclusions: Elderly individuals with abdominal obesity and low skeletal muscle mass have higher all-cause and cardiovascular mortality risk.
    The Journals of Gerontology Series A Biological Sciences and Medical Sciences 11/2015; DOI:10.1093/gerona/glv192
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    ABSTRACT: Background: Albuminuria is associated with cognitive impairment in people with type 2 diabetes mellitus (T2DM). The brain volume correlates of albuminuria in people with T2DM have not been well investigated. Methods: We examined 502 individuals with T2DM (9-12 years duration; mean age ~62 years) who had a brain MRI at baseline and at 40 months. Baseline MRI findings were examined by the presence or absence of albuminuria (≥30mg/g creatinine). Changes in MRI findings were examined by whether albuminuria was persistent, intermittent, or absent during follow-up. Results: At baseline, participants with albuminuria (28.7% of the cohort) had more abnormal white matter volume (AWMV) than participants without albuminuria on unadjusted analysis. This difference was attenuated with adjustment for systolic blood pressure, which was higher in participants with albuminuria than in those without albuminuria. During ~3.5 years of follow-up, participants with persistent albuminuria (15.8%) had a greater increase in new AWMV than participants without albuminuria (59.8%) or those with intermittent albuminuria on unadjusted analysis. This difference was attenuated with adjustment for age and systolic blood pressure. There were no significant differences in gray matter volume and total brain volume between participants with or without albuminuria at baseline or during follow-up. There was no significant effect modification of these findings by estimated glomerular filtration rate (eGFR) at baseline or change in eGFR during follow-up. Conclusions: In this diabetic cohort, baseline albuminuria and persistent albuminuria were not independently associated with any significant differences in brain volume measurements compared with participants without albuminuria.
    The Journals of Gerontology Series A Biological Sciences and Medical Sciences 11/2015; DOI:10.1093/gerona/glv187
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    ABSTRACT: Background: Muscle power is a key predictor of physical function in older adults; however, clinically meaningful improvements in leg-extensor muscle power have yet to be identified. The purpose of this study is to establish the minimal clinically important improvement (MCII) and substantial improvement (SI) for leg-extensor power and muscle contraction velocity in mobility-limited older adults. Methods: Data were extracted from three randomized trials of leg-extensor muscle power training interventions (3- to 6-month duration). Measurements of leg-extensor power and velocity were obtained using dynamic bilateral leg press at 40% and 70% of the one-repetition maximum. Anchor-based MCIIs were calculated using selected items extracted from the Late Life Function and Disability Instrument. Standard error of measurement and effect size methods were used to calculate the distribution-based MCII. Results: Data from 164 participants (mean age: 76.6±5.6 years; Short Physical Performance Battery score: 7.8±1.3) were used in this analysis. The respective MCII and SI estimates for 40% leg-extensor power were 18.3 (9%) and 30.5 (15%) W, and 23.1 (10%) and 41.6 (18%) W for 70% leg-extensor power. The respective MCII and SI estimates for 40% average velocity were 0.03(7%) and 0.08(18%) m/s, and 0.02(6%) and 0.05(15%) m/s for 70% average velocity. Conclusions: This is the first study to establish a clinically meaningful improvement of leg-extensor power (9%-10%) and velocity (6%-7%) in mobility-limited older adults. These findings should be used to aid in the design and interpretation of clinical trials and interventions that target improvements in muscle power in this high-risk population.
    The Journals of Gerontology Series A Biological Sciences and Medical Sciences 11/2015; DOI:10.1093/gerona/glv207
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    ABSTRACT: Background: Disability in older African American adults is common, but its basis is unclear. We tested the hypothesis that the level of motor function is associated with incident disability in older African Americans after adjusting for cognition. Methods: A prospective observational cohort study of 605 older community-dwelling African American adults without dementia was carried out. Baseline global motor score summarized 11 motor performances, cognition was based on 19 cognitive tests, and self-reported disability was obtained annually. We examined the association of motor function with incident disability (instrumental activities of daily living [IADL], activities of daily living [ADL], and mobility disability) with a series of Cox proportional hazards models which controlled for age, sex, and education. Results: Average follow-up was about 5 years. In proportional hazards models, a 1-SD increase in baseline level of global motor score was associated with about a 50% decrease in the risk of subsequent IADL, ADL, and mobility disability (all p values < .001). These associations were unchanged in analyses controlling for cognition and other covariates. Further, the association of global motor score and incident ADL disability varied with the level of cognition (estimate -5.541, SE 1.634, p < .001), such that higher motor function was more protective at higher levels of cognition. Mobility and dexterity components of global motor score were more strongly associated with incident disability than strength (all p values < .001). Conclusions: Better motor function in older African Americans is associated with a decreased risk of developing disability. Moreover, the association of motor function and disability is stronger in individuals with better cognitive function.
    The Journals of Gerontology Series A Biological Sciences and Medical Sciences 11/2015; DOI:10.1093/gerona/glv186
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    ABSTRACT: Background: There is little evidence on the long-term association between physical activity (PA) and depressive symptoms in old age. We examined the association of midlife PA and depressive symptoms in late life. Methods: A large community-based population residing in Reykjavik, Iceland, participated in a longitudinal study with an average of 25 years of follow up. Midlife PA was categorized as active and inactive groups (n = 4,140, Active = 1,292, Inactive = 2,848, mean age 52±7 years). The main outcome had six or higher depressive symptoms assessed by the 15-item Geriatric Depression scale. Participants who had a history of depression (n = 226), and were diagnosed with dementia (n = 393), and had incomplete cognitive data (n = 595) and incomplete analytical data (n = 422) were excluded. Level of weekly PA was ascertained by a questionnaire at midlife. Depressive symptoms were assessed on average 25 (±4) years later. Results: After controlling for demographic and health-related risk factors, those who were active at midlife were less likely to have high level of depressive symptomatology (6 or higher Geriatric Depression scale scores, odds ratio = 0.58, 95% confidence interval: 0.41-0.83, p < .005) compared with those who were inactive in midlife. After full adjustment of three domains of late-life cognitive function the results remained significant (odds ratio = 0.61, 95% confidence interval: 0.43-0.86, p = .005). Conclusion: Our study shows that midlife PA is associated with lower depressive symptoms 25 years later. Participating in regular PA in midlife may improve mental health in late life.
    The Journals of Gerontology Series A Biological Sciences and Medical Sciences 11/2015; DOI:10.1093/gerona/glv196
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    ABSTRACT: Background: We present a case of bilateral Temporomandibular joint (TMJ) ankylosis due to Rheumatoid arthritis (RA), the first case in our centre and indeed in Nigeria to the best our knowledge. The ankylosis was successfully released by bilateral condylectomy. Methodology: The case records of a 60 year old woman with an inability to open the mouth over a period of 13 years following a previously rheumatoid arthritis of peripheral joints was reviewed. The details of clinical and radiological findings were recorded in addition to the definitive management. Result: Bilateral condylectomy was performed and the ankylosis released. Vigorous jaw exercised was commenced on her and she had an uneventful post operative stay. She was discharged home with moderate mouth opening. Early mobilization and aggressive physiotherapy was instituted in order to prevent re-ankylosis. She had not experienced relapsed since a year after the procedure. Conclusion: A rare case of bilateral TMJ ankylosis resulting from long standing RA hereby presented, this case was successfully managed by bilateral condylectomy. It is, of paramount importance, that dental health care providers have a proper knowledge of systemic diseases affecting the function of orofacial structures Keywords--- TMJ ankylosis, Rheumatoid arthritis, Condylectomy
    The Journals of Gerontology Series A Biological Sciences and Medical Sciences 10/2015; 03(04):128-131.
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    ABSTRACT: Circulating osteogenic progenitor (COP) cells are considered as surrogates of the mesenchymal repository in the body. In this study, we hypothesized that COP cells decrease with age and that lower levels of COP cells are associated with greater frailty and disability in older persons. Using well-established clinical criteria, we quantified physical performance and disability and stratified frailty in a random sample of community-dwelling individuals enrolled in the Nepean Osteoporosis and Frailty (NOF) Study (mean age 82.8; N = 77; 70% female; 27 nonfrail, 23 prefrail, and 27 frail). Percentage of COP cells was quantified by flow cytometry. Logistic regression models estimated the relationship between the percentage of COP cells and prevalent disability, poor physical performance, and frailty. We found that aging is associated with a significant decrease in COP cells (p < .001). Lower percentages of COP cells were associated with disability and poor physical performance (p < .001). Older adults with COP cells in the lower quartile were more likely to be frail (odds ratio 2.65, 95% confidence interval 2.72-3.15, p < .001). In conclusion, COP cells in the circulation decrease with age. Lower percentages of COP cells in late life are associated with prevalent frailty and disability. Further longitudinal studies are needed to understand COP cells as a risk stratifier, biomarker, or therapeutic target and to predict disability in frail older persons.
    The Journals of Gerontology Series A Biological Sciences and Medical Sciences 09/2015; DOI:10.1093/gerona/glv190
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    ABSTRACT: Background: Evidence implicates the amount and location of fat in aging-related loss of muscle function; however, whether intramyocellular lipids affect muscle contractile capacity is unknown. Methods: We compared both in vivo knee extensor muscle strength, power, and quality and in vitro mechanical properties of vastus lateralis single-muscle fibers between normal weight (NW) and obese older adults and determined the relationship between muscle lipid content (both intramuscular adipose tissue and intramyocellular lipids) and in vivo and in vitro muscle function in NW and obese individuals. Results: The obese group had a greater percentage of type-I fibers compared to the NW group. The cross-sectional area of type-I fibers was greater in obese compared to NW; however, maximal shortening velocity of type-I fibers in the obese was slower compared to NW. Type-I and type-IIa fibers from obese group produced lower specific force than that of type-I and type-IIa fibers from the NW group. Normalized power was also substantially lower (~50%) in type-I fibers from obese adults. The intramyocellular lipids data showed that total lipid droplet area, number of lipid droplets, and area fraction were about twofold greater in type-I fibers from the obese compared to the NW group. Interestingly, a significant inverse relationship between average number of lipid droplets and single-fiber unloaded shortening velocity, maximal velocity, and specific power was observed in obese participants. Additionally, muscle echointensity correlated with single-fiber specific force. Conclusions: These data indicate that greater intramyocellular lipids are associated with slower myofiber contraction, force, and power development in obese older adults.
    The Journals of Gerontology Series A Biological Sciences and Medical Sciences 09/2015; DOI:10.1093/gerona/glv169