Cardiovascular Adaptive Homeostasis in Exercise.

Adaptive Homeostasis has been defined as, "The transient expansion or contraction of the homeostatic range in response to exposure to sub-toxic, non-damaging, signaling molecules or events, or the removal or cessation of such molecules or events." (Davies, 2016). I propose that one of the most significant examples of adaptive homeostasis may be the adaptation of the cardiovascular system to exercise training.

The role of oxidative stress in anxiety disorder: cause or consequence?

Anxiety disorders are the most common mental illness in the USA affecting 18% of the population. The cause(s) of anxiety disorders is/are not completely clear, and research in the neurobiology of anxiety at the molecular level is still rather limited. Although mounting clinical and preclinical evidence now indicates that oxidative stress may be a major component of anxiety pathology, whether oxidative stress is the cause or consequence remains elusive.

Aging attenuates redox adaptive homeostasis and proteostasis in female mice exposed to traffic-derived nanoparticles ('vehicular smog').

Environmental toxicants are catalysts for protein damage, aggregation, and the aging process. Fortunately, evolution selected adaptive homeostasis as a system to mitigate such damage by expanding the normal capacity to cope with toxic stresses. Little is known about the subcellular degradative responses to proteins oxidatively damaged by air pollution.

Association of Severity of Coronary Lesions with Bone Mineral Density in Postmenopausal Women.

Background: Coronary artery disease (CAD) and osteoporosis (OP) are common diseases in postmenopausal women. In both cross-sectional and longitudinal epidemiologic studies, low bone mass has been related to increased frequency of CAD. However, available data on the relationship between bone mineral density (BMD) and severity of coronary lesions is limited.

Educational Differences in the Prevalence of Dementia and Life Expectancy with Dementia: Changes from 2000 to 2010.

Objectives: This article provides the first estimates of educational differences in age-specific prevalence, and changes in prevalence over time, of dementia by education levels in the United States. It also provides information on life expectancy, and changes in life expectancy, with dementia and cognitively healthy life for educational groups.

Method: Data on cognition from the 2000 and 2010 Health and Retirement Study are used to classify respondents as having dementia, cognitive impairment without dementia (CIND), or being cognitively intact.

Cerebral microhemorrhages due to traumatic brain injury and their effects on the aging human brain.

Although cerebral microbleeds (CMBs) are frequently associated with traumatic brain injury (TBI), their effects on clinical outcome after TBI remain controversial and poorly understood, particularly in older adults. Here we (1) highlight major challenges and opportunities associated with studying the effects of TBI-mediated CMBs; (2) review the evidence on their potential effects on cognitive and neural outcome as a function of age at injury; and (3) suggest priorities for future research on understanding the clinical implications of CMBs. Although TBI-mediated CMBs are likely distinct from those due to cerebral amyloid angiopathy or other neurodegenerative diseases, the effects of these 2 CMB types on brain function may share common features.

Twenty-year trends in cardiovascular risk among men and women in the United States.

Background: Relative to men, women have experienced slower improvement in mortality in the US in recent decades.

Aims: We investigated 20-year trends in cardiovascular risk for men and women age 40 and over in the US to determine whether there was differential change in risk for men and women.

Methods: Using the National Health and Nutrition Examination Survey (NHANES), we estimated total cardiovascular risk, the prevalence of individual risk factors, and potential factors contributing to change in risk.

Sex-specific adaptive homeostasis in depends on increased proteolysis by the 20S Proteasome: Data-in-Brief.

Adaptive homeostasis enables rapid cellular signaling, leading to transcriptional and translational modifications (Davies, 2016) [1]. The Proteasome is one of the main cellular proteolytic enzymes that plays an essential role in the rapid clearance of oxidatively damaged cellular proteins, and is highly responsive to oxidative stress. Upon exposure to even very low, signaling levels of oxidants, the predominant form of the Proteasome becomes the ATP-independent 20S proteasome that enables rapid clearance of damaged proteins.

"So we basically let them struggle": Student perceptions of challenges in intergenerational Service-Learning.

Service-learning is a widely used pedagogical practice that integrates community involvement and civic engagement into the classroom. Benefits of service-learning in gerontology include an increased sense of personal growth, greater knowledge of aging, and enhanced interest in aging-related careers. However, relatively little research has specifically explored the challenges associated with intergenerational service-learning.

Cross-Sectoral Partnerships By Area Agencies On Aging: Associations With Health Care Use And Spending.

Area Agencies on Aging (AAAs)-which coordinate social services for older adults in communities across the US-regularly address social determinants of health, sometimes in partnership with other social services and health care organizations. Using data from a 2013 national survey of these agencies, we examined whether their partnership activities were associated with 2014 levels of avoidable health care use and spending for older adults in counties served by each AAA. Multivariate regression models adjusted for agency characteristics, county demographic characteristics, and health care supply factors.

Where There's a Will: The Link Between Estate Planning and Disparities in Advance Care Planning by White and Black Older Adults.

Data from the Health and Retirement Study ( n = 6,946) were used to test whether differences in estate planning accounted for disparities in advance care planning between White and Black older adults. White participants were more likely to have advance directives after controlling for demographic, health, and financial variables. When estate planning was also controlled, the odds of having an advance directive were equal for White and Black participants.

The Oxygen Paradox, the French Paradox, and age-related diseases.

A paradox is a seemingly absurd or impossible concept, proposition, or theory that is often difficult to understand or explain, sometimes apparently self-contradictory, and yet ultimately correct or true. How is it possible, for example, that oxygen "a toxic environmental poison" could be also indispensable for life (Beckman and Ames Physiol Rev 78(2):547-81, 1998; Stadtman and Berlett Chem Res Toxicol 10(5):485-94, 1997)?: the so-called Oxygen Paradox (Davies and Ursini 1995; Davies Biochem Soc Symp 61:1-31, 1995). How can French people apparently disregard the rule that high dietary intakes of cholesterol and saturated fats (e.

Phase II prospective randomized trial of weight loss prior to radical prostatectomy.

Background: Obesity is associated with poorly differentiated and advanced prostate cancer and increased mortality. In preclinical models, caloric restriction delays prostate cancer progression and prolongs survival. We sought to determine if weight loss (WL) in men with prostate cancer prior to radical prostatectomy affects tumor apoptosis and proliferation, and if WL effects other metabolic biomarkers.

Redox Regulation of Homeostasis and Proteostasis in Peroxisomes.

Peroxisomes are highly dynamic intracellular organelles involved in a variety of metabolic functions essential for the metabolism of long-chain fatty acids, d-amino acids, and many polyamines. A byproduct of peroxisomal metabolism is the generation, and subsequent detoxification, of reactive oxygen and nitrogen species, particularly hydrogen peroxide (HO). Because of its relatively low reactivity (as a mild oxidant), HO has a comparatively long intracellular half-life and a high diffusion rate, all of which makes HO an efficient signaling molecule.

Delivering Person-Centered Care: Important Preferences for Recipients of Long-term Services and Supports.

Objectives: Although assessing individual consumer preferences are an important first step in providing person-centered care, the purpose of this study was to identify the top 10 shared preferences that are important to a majority of consumers receiving long-term services and supports.

Design: A cross-sectional survey design was used.

Setting And Participants: Preference assessment interviews were conducted with 255 nursing home (NH) residents and 528 older adults receiving home and community-based services (HCBS).

Sexual dimorphism in oxidant-induced adaptive homeostasis in multiple wild-type D. melanogaster strains.

Sexual dimorphism includes the physical and reproductive differences between the sexes, including differences that are conserved across species, ranging from the common fruit fly, Drosophila melanogaster, to humans. Sex-dependent variations in adaptive homeostasis, and adaptive stress responses may offer insight into the underlying mechanisms for male and female survival differences and into differences in chronic disease incidence and severity in humans. Earlier work showed sex-specific differences in adaptive responses to oxidative stressors in hybrid laboratory strains of D.

Diminished stress resistance and defective adaptive homeostasis in age-related diseases.

Adaptive homeostasis is defined as the transient expansion or contraction of the homeostatic range following exposure to subtoxic, non-damaging, signaling molecules or events, or the removal or cessation of such molecules or events (). Adaptive homeostasis allows us to transiently adapt (and then de-adapt) to fluctuating levels of internal and external stressors. The ability to cope with transient changes in internal and external environmental stress, however, diminishes with age.

Traumatic Brain Injury Severity, Neuropathophysiology, and Clinical Outcome: Insights from Multimodal Neuroimaging.

Background: The relationship between the acute clinical presentation of patients with traumatic brain injury (TBI), long-term changes in brain structure prompted by injury and chronic functional outcome is insufficiently understood. In this preliminary study, we investigate how acute Glasgow coma score (GCS) and epileptic seizure occurrence after TBIs are statistically related to functional outcome (as quantified using the Glasgow Outcome Score) and to the extent of cortical thinning observed 6 months after the traumatic event.

Methods: Using multivariate linear regression, the extent to which the acute GCS and epileptic seizure occurrence (predictor variables) correlate with structural brain changes (relative cortical atrophy) was examined in a group of 33 TBI patients.

The role of declining adaptive homeostasis in ageing.

Adaptive homeostasis is "the transient expansion or contraction of the homeostatic range for any given physiological parameter in response to exposure to sub-toxic, non-damaging, signalling molecules or events, or the removal or cessation of such molecules or events" (Davies, 2016). Adaptive homeostasis enables biological systems to make continuous short-term adjustments for optimal functioning despite ever-changing internal and external environments. Initiation of adaptation in response to an appropriate signal allows organisms to successfully cope with much greater, normally toxic, stresses.

Temporal changes in glutathione biosynthesis during the lipopolysaccharide-induced inflammatory response of THP-1 macrophages.

How macrophages maintain redox homeostasis in the inflammatory process, in which a large amount of oxidants are produced, remains elusive. In this study, we investigated the temporal changes in the intracellular glutathione (GSH), the master antioxidant, and the expression of glutamate cysteine ligase (GCL), the rate-limiting enzyme for GSH biosynthesis, in the inflammatory response of human macrophages (THP1 cells) to lipopolysaccharide. Intracellular GSH concentration was decreased significantly in the early phase (~6h) of LPS exposure, and then gradually went back to the basal level in the late phase (9-24h).

Family Involvement in the Nursing Home and Perceived Resident Quality of Life.

Purpose Of Study: This study focuses on the relationship between family involvement and family perceptions of nursing home residents' quality of life (QOL).

Design And Methods: Resident and family variables from the 2012 Ohio Family Satisfaction Survey were merged with facility information from the Certification and Survey Enhanced Reports (CASPER). Hierarchical linear modeling was used to examine the association between family involvement and other predictors with perceived resident QOL.

Human-Animal Interaction and Older Adults: An Overview.

Both pet ownership and animal-assisted therapy are becoming increasingly popular in the United States, and the science of human-animal interaction (HAI) seeks to explore how these relationships with animals can impact health and well-being. In particular, one burgeoning area of research is the role of HAI in healthy aging, given the potential for HAI as an important feature of health and well-being in older adults. The purpose of this review is to summarize and evaluate existing research in this innovative area of scholarship, identifying the potential benefits and risks of both pet ownership and animals in therapeutic settings for older adults.

Aging-related decline in the induction of Nrf2-regulated antioxidant genes in human bronchial epithelial cells.

Evidence from animal studies suggests that stress-induced increases in Nrf2-regulated antioxidant gene expression, a critical mechanism of cellular protection, declines with aging. This study examined whether this also occurs in humans. We measured the basal and inducible levels of Nrf2-regulated antioxidant genes in human bronchial epithelial (HBE) cells from subjects of young adult (21-29 years) and older (60-69 years) non-smokers, and explored factors affecting expresion.

The Mitochondrial-Derived Peptides, HumaninS14G and Small Humanin-like Peptide 2, Exhibit Chaperone-like Activity.

Mitochondrial-derived peptides (MDPs) and their analogs have emerged as wide-spectrum, stress response factors protective in amyloid disease models. MDP cytoprotective functions are generally attributed to anti-apoptotic activity, however, little is known about their capacity to facilitate the cell's unfolded protein response via direct interactions with amyloidogenic proteins. Here, we explored the effects of the MDP-analog, humaninS14G (HNG), and the MDP, small humanin-like peptide 2 (SHLP2), on the misfolding of islet amyloid polypeptide (IAPP), a critical pathogenic step in type 2 diabetes mellitus (T2DM).

Racial and Socioeconomic Disparities in Disabling Chronic Pain: Findings From the Health and Retirement Study.

Unlabelled: The U.S. National Pain Strategy calls for increased population research on "high-impact chronic pain" (ie, longstanding pain that substantially limits participation in daily activities).