Research Centre for Healthy and Sustainable Living

[EN] The Research Centre for Healthy and Sustainable Living of the University of Applied Sciences Utrecht aims to enable healthy urban living. According to the latest concept, health entails the capacity to respond resiliently to stressors that disturb homeostasis. In addition, an individual’s health benefits from the ability to self-manage and is determined by personalized conditions. One of the derived research challenges is to obtain know-how (biomarkers) and tools (e.g. point-of-care, wearables) to monitor an individual’s health condition in daily life. The well-known quotes “you are what you eat” and “sitting is the new smoking” indicate that condition of the oro-gastrointestinal tract and physical activity are pivotal to health. With this popular knowledge, we set out to identify biomarkers to monitor health benefits from nutrition and physical activity. Our first studies with human volunteers indicated that immune and intestinal parameters are responsive to physical stress (performed on a bicycle ergometer) in a clear kinetic manner, related to extent of physical activity and influenced by an unhealthy condition (deprivation of water intake during exercise). Our next research goals are to: -evaluate the initial selection of biomarkers in specific patient-groups and; -how these biomarkers are influenced by the condition of the oro-gastrointestinal tract, e.g. via nutrition.Pieters, R.; Bleijenberg, N.; Jerkovic, K.; Krul, C.; Veenhof, C.; Wittink, H. (2020). Research Centre for Healthy and Sustainable Living. Editorial Universitat Politècnica de València. http://hdl.handle.net/10251/156433OC

Task redistribution in Dutch dental care in relation to dental hygienists' job satisfaction

In research into a professional cross-section of dental hygienists, we studied the extent to which task redistribution has an influence on job satisfaction. The research among randomly chosen dental hygienists consisted of questions about organizational and personal characteristics, the set of assigned tasks, task characteristics and job satisfaction. The respondents were divided into 3 clusters which differed in the breadth of their sets of tasks. Although prevention and periodontology services remain the core tasks in dental hygienists' jobs, the degree of task redistribution differed strongly from cluster to cluster. Respondents with a considerable degree of task redistribution experienced the most task variation, but scored significantly lower on the task characteristics autonomy, feedback, task identity and task importance. This explains why redistribution does not directly correspond with a greater degree of job satisfaction. Moreover, it is precisely the dental hygienists with a broad set of tasks who are significantly less satisfied with their salary than those with a traditional set of tasks

Neuronal signaling by Thy-1 in nanodomains with specific ganglioside composition: shall we open the door to a new complexity?

Thy-1 is a small membrane glycoprotein and member of the immunoglobulin superfamily of cell adhesion molecules. It is abundantly expressed in many cell types including neurons and is anchored to the outer membrane leaflet via a glycosyl phosphatidylinositol tail. Thy-1 displays a number of interesting properties such as fast lateral diffusion, which allows it to get in and out of membrane nanodomains with different lipid composition. Thy-1 displays a broad expression in different cell types and plays confirmed roles in cell development, adhesion and differentiation. Here, we explored the functions of Thy-1 in neuronal signaling, initiated by extracellular binding of aVb3 integrin, may strongly dependent on the lipid content of the cell membrane. Also, we assort literature suggesting the association of Thy-1 with specific components of lipid rafts such as sialic acid containing glycosphingolipids, called gangliosides. Furthermore, we argue that Thy-1 positioning in nanodomains may be influenced by gangliosides. We propose that the traditional conception of Thy-1 localization in rafts should be reconsidered and evaluated in detail based on the potential diversity of neuronal nanodomains

Gangliosidome of a Human Hippocampus in Temporal Lobe Epilepsy Resolved by High-Resolution Tandem Mass Spectrometry

In this study, we developed a high-resolution tandem mass spectrometry (HR MS) approach to assess presumed changes in gangliosidome of a human hippocampus affected by temporal lobe epilepsy (TLE) in comparison with a normal hippocampus. Gangliosides, membrane glycolipids, are particularly diverse and abundant in the human brain, and participate in ion transport and modulation of neuronal excitability. Changes in structural ganglioside pattern potentially linked to TLE molecular pathogenesis have not been explored in detail. Aiming to characterize TLE-specific gangliosidome, we analyzed the native gangliosides purified from a human hippocampal tissue sample affected by TLE and a control hippocampus using HR MS. Marked differences of ganglioside expression were shown in TLE vs. control, particularly with respect to the sialylation degree of components, discovered as a characteristic feature of TLE. Another major finding is the occurrence of tetrasialofucogangliosides in TLE and species modified by either O-acetylation or CH3COO−. Structural analysis by higher-energy collisional dissociation (HCD) MS/MS gave rise to fragmentation patterns implying that the GQ1b (d18:1/18:0) isomer is specifically associated with TLE. Further investigation in a larger sample is needed in order to confirm the discovery of ganglioside structures specifically expressed in human TLE and to provide information on the probable role of gangliosides in the molecular events underlying seizures

Differences in oral health behaviour between children from high and children from low SES schools in the Netherlands

Objective To identify the determinants of dental caries in relation to socio-economic status (SES) within oral health, children's eating habits and parental attitudes towards oral health. Basic research design Dental screening data were collected from 6- and 10-year old schoolchildren from low and high SES schools in the Netherlands in this cross-sectional Study. Methods The clinical examination was performed by trained dental hygiene students who collected the data on dental caries, dental plaque and duration of brushing. The paper questionnaire completed by the parents included 18 questions about oral health behaviour, eating habits and parental attitudes towards oral health. Results Two of the six parameters of oral health behaviour were statistically associated with the high caries prevalence in the low SES group (brushing frequency (p = 0.028) and age at the first visit to the dentist (p = 0.044)). High intake of fruit juices and/or soft drinks (p = 0.043) and low calcium intake (p = 0.028) were identified as risk determinants for caries with low SES. All parameters of parental attitudes towards oral health were associated with caries, but not with SES. Conclusions This study confirmed that the high caries prevalence in children from low SES schools was associated with oral health behaviour and eating habits. The role of parents was indirectly associated with the occurrence of dental caries. Therefore, it is important to include parents in all intervention programmes in order to reduce the prevalence of caries