How young adults view older people: exploring the pathways of constructing a group image after participation in an intergenerational programme

In recent years, a multitude of intergenerational contact programmes and interventions has emerged to counteract ageism among young adults. Research on these programmes and its supposed effect on ageism often start from the assumption that intergenerational contact follows a largely linear process in which a high level of encounters, in the right setting, decreases ageism and negative stereotyping. The purpose of this article is to critically examine this assumption by focussing on the underlying process of intergenerational contact, rather than examining the positive or negative outcome. Using in-depth interviews with 35 young adults, we found that although conditions and mediating factors during the contact do play a role in the outcome of intergroup contact, the process of contact is rather varied and does not follow a linear path. The results reveal that whether or not a positive contact experience translates into a changed group image of older people is related to the positioning of such experience within the young adults? personal frame of reference. We found that this has to do with the young adults having diverse and both positive and negative previous experiences, their grandparent-grandchild relationship, stories from others and personal characteristics. With this study, we point to the complexity of intergenerational contact and highlight potential pathways leading to varying group images of ?the old?.Prevention, Population and Disease management (PrePoD)Public Health and primary car

Doc2 Proteins Are Not Required for the Increased Spontaneous Release Rate in Synaptotagmin-1-Deficient Neurons

Regulated secretion is controlled by Ca 2+ sensors with different affinities and subcellular distributions. Inactivation of Syt1 (synaptotagmin-1), the main Ca 2+ sensor for synchronous neurotransmission in many neurons, enhances asynchronous and spontaneous release rates, suggesting that Syt1 inhibits other sensors with higher Ca 2+ affinities and/or lower cooperativities. Such sensors could include Doc2a and Doc2b, which have been implicated in spontaneous and asynchronous neurotransmitter release and compete with Syt1 for binding SNARE complexes. Here, we tested this hypothesis using triple-knock-out mice. Inactivation of Doc2a and Doc2b in Syt1-deficient neurons did not reduce the high spontaneous release rate. Overexpression of Doc2b variants in triple-knock-out neurons reduced spontaneous release but did not rescue synchronous release. A chimeric construct in which the C2AB domain of Syt1 was substituted by that of Doc2b did not support synchronous release either. Conversely, the soluble C2AB domain of Syt1 did not affect spontaneous release. We conclude that the high spontaneous release rate in synaptotagmin-deficient neurons does not involve the binding of Doc2 proteins to Syt1 binding sites in the SNARE complex. Instead, our results suggest that the C2AB domains of Syt1 and Doc2b specifically support synchronous and spontaneous release by separate mechanisms. (Both male and female neurons were studied without sex determination)

Munc18-1: sequential interactions with the fusion machinery stimulate vesicle docking and priming

Exocytosis of secretory or synaptic vesicles is executed by a mechanism including the SNARE (soluble N-ethylmaleimide-sensitive factor attachment protein receptor) proteins. Munc18-1 is a part of this fusion machinery, but its role is controversial because it is indispensable for fusion but also inhibits the assembly of purified SNAREs in vitro. This inhibition reflects the binding of Munc18-1 to a closed conformation of the target-SNARE syntaxin1. The controversy would be solved if binding to closed syntaxin1 were shown to be stimulatory for vesicle fusion and/or additional essential interactions were identified between Munc18-1 and the fusion machinery. Here, we provide evidence for both notions by dissecting sequential steps of the exocytotic cascade while expressing Munc18 variants in the Munc18-1 null background. In Munc18-1 null chromaffin cells, vesicle docking is abolished and syntaxin levels are reduced. A mutation that diminished Munc18 binding to syntaxin1 in vitro attenuated the vesicle-docking step but rescued vesicle priming in excess of docking. Conversely, expressing the Munc18-2 isoform, which also displays binding to closed syntaxin1, rescued vesicle docking identical with Munc18-1 but impaired more downstream vesicle priming steps. All Munc18 variants restored syntaxin1 levels at least to wild-type levels, showing that the docking phenotype is not caused by syntaxin1 reduction. None of the Munc18 variants affected vesicle fusion kinetics or fusion pore duration. In conclusion, binding of Munc18-1 to closed syntaxin1 stimulates vesicle docking and a distinct interaction mode regulates the consecutive priming step. Copyright © 2007 Society for Neuroscience

Toward age-friendly policies: using the framework of age-friendliness to evaluate COVID-19 measures from the perspectives of older people in the Netherlands

Protective measures that were taken during the COVID-19 pandemic, targeted older people as an at-risk group. The objective of this article is to investigate how older people in the Netherlands experienced the mitigation measures and whether these measures endorse and promote the idea of an age-friendly world. The WHO conceptual framework of age-friendliness, which consists of eight areas, has been used for a framework analysis of 74 semi-structured interviews with older Dutch adults, that were held during the first and the second wave of the pandemic. The results of the analysis indicate that the areas of social participation, respect and inclusion were affected most, and the measures concerning communication and the health services were experienced as age-unfriendly. The WHO framework is a promising tool for assessment of social policies, and we suggest its further development for this purpose. Prevention, Population and Disease management (PrePoD)Public Health and primary car

The promises of inclusive research methodologies: relational design and praxis

This article explores the potential and challenges of inclusive research methodologies when working with older individuals with lower literacy levels. We present inclusive approaches developed during our research and discuss their implications for methodology and individual well-being among older adults with lower literacy levels. Our key insight is that the promise of inclusive research lies in relational design and praxis. Prioritizing meaningful relationships between researchers and participants, we emphasize the importance of considering participants as active contributors rather than mere informants. Creating a safe and supportive environment fosters trust, empowerment, and meaningful contributions from participants. Flexibility and adaptability in research approaches, including phased informed consent and the minimizing of written language, enhance participants' self-confidence and trust in their own voices. This approach empowers participants in co-creating knowledge, which strengthens the trustworthiness and validity of research results. Inclusive research, while promising, requires researchers to navigate ethical dilemmas, invest time in building rapport, and adapt to participants' needs. It challenges traditional research norms, emphasizing ethical engagement, meaningful participation, and tangible outcomes that benefit both researchers and participants. Employing inclusive research strategies, despite their departure from traditional praxis, ensures that the voices of older individuals with lower literacy levels are respected. This shift enhances the validity of knowledge, promotes co-creation, and fosters feelings of inclusiveness and empowerment. These promises underscore the importance of embracing inclusive research methodologies in contemporary research practices.Prevention, Population and Disease management (PrePoD)Public Health and primary car