scholarly journals Developmental asymmetries in learning to adjust to cooperative and uncooperative environments

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Bianca Westhoff ◽  
Lucas Molleman ◽  
Essi Viding ◽  
Wouter van den Bos ◽  
Anna C. K. van Duijvenvoorde
Keyword(s):  
Rapid Change ◽  
Inequality Aversion ◽  
Cooperative Behaviour ◽  
Social Environments ◽  
Economic Games ◽  
Age Related ◽  
How People Learn ◽  
Computational Analyses ◽  
Developmental Window

AbstractLearning to successfully navigate social environments is a critical developmental goal, predictive of long-term wellbeing. However, little is known about how people learn to adjust to different social environments, and how this behaviour emerges across development. Here, we use a series of economic games to assess how children, adolescents, and young adults learn to adjust to social environments that differ in their level of cooperation (i.e., trust and coordination). Our results show an asymmetric developmental pattern: adjustment requiring uncooperative behaviour remains constant across adolescence, but adjustment requiring cooperative behaviour improves markedly across adolescence. Behavioural and computational analyses reveal that age-related differences in this social learning are shaped by age-related differences in the degree of inequality aversion and in the updating of beliefs about others. Our findings point to early adolescence as a phase of rapid change in cooperative behaviours, and highlight this as a key developmental window for interventions promoting well-adjusted social behaviour.

scholarly journals Developmental asymmetries in learning to adjust to cooperative and uncooperative environments

2020 ◽  
Author(s):  
Bianca Westhoff ◽  
Lucas Molleman ◽  
Essi Viding ◽  
Wouter van den Bos ◽  
Anna C. K. van Duijvenvoorde
Keyword(s):  
Rapid Change ◽  
Inequality Aversion ◽  
Cooperative Behaviour ◽  
Social Environments ◽  
Economic Games ◽  
Age Related ◽  
How People Learn ◽  
Computational Analyses ◽  
Developmental Window

AbstractLearning to successfully navigate social environments is a critical developmental goal, predictive of long-term wellbeing. However, little is known about how people learn to adjust to different social environments, and how this behaviour emerges across development. Here, we use a series of economic games to assess how children, adolescents, and young adults learn to adjust to social environments that differ in their level of cooperation (i.e., trust and coordination). Our results show an asymmetric developmental pattern: adjustment requiring uncooperative behaviour remains constant across adolescence, but adjustment requiring cooperative behaviour improves markedly across adolescence. Behavioural and computational analyses reveal that age-related differences in this social learning are shaped by age-related differences in the degree of inequality aversion and in the updating of beliefs about others. Our findings point to early adolescence as a phase of rapid change in cooperative behaviours, and highlight this as a key developmental window for interventions promoting well-adjusted social behaviour.

scholarly journals Crosstalk between Long-Term Sublethal Oxidative Stress and Detrimental Inflammation as Potential Drivers for Age-Related Retinal Degeneration

Antioxidants ◽  
2020 ◽  
Vol 10 (1) ◽  
pp. 25
Author(s):  
Lara Macchioni ◽  
Davide Chiasserini ◽  
Letizia Mezzasoma ◽  
Magdalena Davidescu ◽  
Pier Luigi Orvietani ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Molecular Mechanisms ◽  
Age Related Macular Degeneration ◽  
Inflammasome Activation ◽  
Related Factor ◽  
Nuclear Factor ◽  
Rpe Cells ◽  
Age Related ◽  
Oxidative Insult

Age-related retinal degenerations, including age-related macular degeneration (AMD), are caused by the loss of retinal pigmented epithelial (RPE) cells and photoreceptors. The pathogenesis of AMD, deeply linked to the aging process, also involves oxidative stress and inflammatory responses. However, the molecular mechanisms contributing to the shift from healthy aging to AMD are still poorly understood. Since RPE cells in the retina are chronically exposed to a pro-oxidant microenvironment throughout life, we simulated in vivo conditions by growing ARPE-19 cells in the presence of 10 μM H2O2 for several passages. This long-term oxidative insult induced senescence in ARPE-19 cells without affecting cell proliferation. Global proteomic analysis revealed a dysregulated expression in proteins involved in antioxidant response, mitochondrial homeostasis, and extracellular matrix organization. The analyses of mitochondrial functionality showed increased mitochondrial biogenesis and ATP generation and improved response to oxidative stress. The latter, however, was linked to nuclear factor-κB (NF-κB) rather than nuclear factor erythroid 2–related factor 2 (Nrf2) activation. NF-κB hyperactivation also resulted in increased pro-inflammatory cytokines expression and inflammasome activation. Moreover, in response to additional pro-inflammatory insults, senescent ARPE-19 cells underwent an exaggerated inflammatory reaction. Our results indicate senescence as an important link between chronic oxidative insult and detrimental chronic inflammation, with possible future repercussions for therapeutic interventions.

scholarly journals Chondroitin 6-sulphate is required for neuroplasticity and memory in ageing

2021 ◽  
Author(s):  
Sujeong Yang ◽  
Sylvain Gigout ◽  
Angelo Molinaro ◽  
Yuko Naito-Matsui ◽  
Sam Hilton ◽  
...  
Keyword(s):  
Chondroitin Sulphate ◽  
Memory Loss ◽  
Memory Deficits ◽  
Long Term Potentiation ◽  
Aged Mice ◽  
Age Related ◽  
Term Potentiation ◽  
Early Memory

AbstractPerineuronal nets (PNNs) are chondroitin sulphate proteoglycan-containing structures on the neuronal surface that have been implicated in the control of neuroplasticity and memory. Age-related reduction of chondroitin 6-sulphates (C6S) leads to PNNs becoming more inhibitory. Here, we investigated whether manipulation of the chondroitin sulphate (CS) composition of the PNNs could restore neuroplasticity and alleviate memory deficits in aged mice. We first confirmed that aged mice (20-months) showed memory and plasticity deficits. They were able to retain or regain their cognitive ability when CSs were digested or PNNs were attenuated. We then explored the role of C6S in memory and neuroplasticity. Transgenic deletion of chondroitin 6-sulfotransferase (chst3) led to a reduction of permissive C6S, simulating aged brains. These animals showed very early memory loss at 11 weeks old. Importantly, restoring C6S levels in aged animals rescued the memory deficits and restored cortical long-term potentiation, suggesting a strategy to improve age-related memory impairment.

Aging of Competitive Athletes

Gerontology ◽  
2017 ◽  
Vol 63 (5) ◽  
pp. 488-494 ◽  
Author(s):  
Hirofumi Tanaka
Keyword(s):  
Older Adults ◽  
Poor Quality ◽  
Negative Stereotypes ◽  
Age Related ◽  
Masters Athletes ◽  
Competitive Athletes ◽  
Vascular Stiffening ◽  
High Motivation ◽  
Clinical Conditions

Demographics of human aging are rapidly changing. As illustrated in the biomedicalization of aging, an ever increasing number of older adults is affected by a variety of clinical conditions and diseases, including vascular stiffening, sarcopenia, physical disability, and poor quality of life. One population that is situated in the opposite end of the health and functional spectrum to the sedentary frail elderly is Masters athletes. These older competitive athletes are endowed with substantial functional capacity, overall long-term health, high motivation, and psychosocial outlook. Masters athletes are combating the dogma and negative stereotypes of older adults and aging. From the scientific standpoint, examining Masters athletes can provide insight into preventive gerontology, primary prevention of age-related diseases and dysfunctions, and exercise-based medical practices. Moreover, the study on Masters athletes is simply joyous and entertaining as they often remind us what can be possible in aging.

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