View clinical trials related to Immune System Tolerance.
Filter by:The purpose of this study is to assess the effects of polyphenols from natural aronia juice on the immune system. Therefore, the study aims to distinguish the effects of natural juices that are rich in phytonutrients such as polyphenols and carotenoids in healthy and depressive subjects in order to use the known positive effects of these food sources in the therapeutic setting. The consumption of natural fruit juices that are rich in polyphenols and carotenoids mirror a model of vegetarian diet due to the increased micronutrient density derived from plant food. Results obtained here can be seen as preliminary explanation models for the beneficial effects of vegetarian diet. It is hypothesized, that the consumption of naturally polyphenol rich aronia juice changes the expression of regulatory T cells, specific cells of the immunesystem that contribute to immunomodulation. Furthermore, beneficial changes in the gut microbiome, the metabolome and the nutritional status are expected in the studied groups. The study was registered retrospectively (after start of recruitment) on Clinicaltrials.gov.
COVID-19 vaccinations are predicted to be a huge success in pandemic control. However, the majority of the studies were conducted on healthy individuals, and the efficiency of COVID-19 vaccination in post-transplant patients is uncertain. In the setting of HSCT, the extreme immunosuppression caused by the conditioning regimen and the graft versus host disease (GvHD) preventive regimen clearly has an impact on the efficacy and immunogenicity of the COVID-19 vaccine. Given the importance of eliciting early SARS-Cov-2 protective immunity in patients who are undergoing Allo-HSCT and the EBMT recommendation to endorse vaccination as early as 3 months after allo-HCT [7], we conduct this prospective study to investigate the safety and immunogenicity of three doses Pastucovac (an RBD-based SARS-Cov-2 vaccine) at the early post-transplant period in adult Iranian patients who are undergoing Allo-HSCT. We also want to see whether there are any possible predictors, such as the effect of clinical characteristics and lymphocyte subpopulations at the time of vaccination on the serologic response following immunization. The findings of this study will serve to guide future COVID-19 vaccination recommendations in this population, such as the optimal starting time, interval time, and so on.