Clinical trials

In this study, three neonatal evidence-based antibiotic stewardship strategies will be implemented in Dutch hospitals. These include the early-onset sepsis (EOS) calculator, procalcitonin (PCT)-guided therapy, and IV-to-oral switch therapy. These strategies have been proven to be effective and safe and are already applied in several Dutch hospitals. However, this is not the case for all hospitals, leading to significant variations in clinical practice. To facilitate the translation of evidence into practice, active implementation will take place. The primary research design is a prospective implementation study, using a multicenter, non-randomized pre-post design. The aim is to assess the impact of implementing a bundle of antibiotic stewardship interventions (including the EOS calculator, PCT-guided therapy and iv-to-oral switch therapy) in Dutch hospitals, using a multicomponent implementation strategy, on both clinical and implementation outcomes, with a particular focus on evaluating the employed implementation strategies. A combination of qualitative and quantitative research methods will be used to assess outcomes. Quantitative clinical data from neonates in the pre- and post-implementation periods will be retrospectively collected by the Business Intelligence units of participating hospitals and anonymized before being provided to the central research team. Qualitative data will be gathered through focus groups, interviews, and surveys.

In this pilot study the feasibility of performing a larger trial to study the non-inferiority of High Flow Nasal Oxygen compared to non-invasive ventilation in patients with acute acidotic hypercapnic exacerbation of COPD wil be investigated

TRICOLON is an investigator initiated, prospective, interventional, open-label, randomized, real-world, multi-centre, 3-arms study in the Netherlands. The primary objective is to investigate in COPD patients if single-inhaler triple therapy (SITT) is superior to multi-inhaler triple therapy (MITT) in terms of adherence to inhaled corticosteroids (ICS) therapy and to investigate if SITT with e-health support is superior to MITT and SITT without e-health support.

The coronavirus disease 2019 (COVID-19) pandemic, caused by the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), has resulted in millions of deaths worldwide. As of 2024, the SARS-CoV-2 Omicron variant is the predominant strain circulating within the population, generally causing mild upper respiratory tract infections. However, hospitalizations and case fatalities due to COVID-19 continue, and there is a high probability that a new human coronavirus will emerge in the future. Understanding the pathophysiology of severe COVID-19 remains highly relevant, as its mechanisms may be comparable to those of other respiratory viral infections. SARS-CoV-2 infects human cells primarily by binding to angiotensin-converting enzyme 2 (ACE2) and type 2 transmembrane serine protease (TMPRSS2) receptors, which are both expressed in alveolar epithelial type II cells, through the virus' spike protein. In a later stage, the replication of SARS-CoV-2 and activation of resident immune cells lead to the infiltration and activation of large numbers of innate immune cells. Consequently, this results in an excessive pro-inflammatory immune response, including increased production of IL-6, a hallmark cytokine of severe COVID-19. Eventually, the excessive inflammation results in microthrombus formation and pulmonary edema. Further studies have indicated that SARS-CoV-2 spike-specific antibodies, along with alveolar macrophages, play a pivotal role in the pathophysiology of severe COVID-19. Alveolar macrophages, which reside in the lung alveoli, are typically the first immune cells to sense pulmonary pathogens. However, these cells can also bind IgG antibodies through their Fc-receptor, leading to cellular activation. When stimulated with both a viral stimulus and anti-SARS-CoV-2 IgG antibodies from severe COVID-19 patients (a situation similar to that in the lungs of these patients) alveolar macrophages elicit a significant proinflammatory response. This response aligns with the observed post-seral conversion deterioration in COVID-19 patients. Obesity is a significant risk factor for developing severe COVID-19, but the underlying mechanism is not well understood. Previous studies report that macrophages in obese patients are skewed towards a pro-inflammatory phenotype due to altered fatty acid contents, particularly increased saturated fatty acids. Using our in vitro obesity model, which incorporates higher saturated fatty acid contents, the investigators already demonstrated that SARS-CoV-2 antibody-mediated inflammation of alveolar macrophages is increased (unpublished data). Thus, this may explain why obese patients are more likely to develop severe COVID-19. To validate these in vitro findings, the investigators aim to confirm these results in monocyte-derived macrophages isolated from individuals with and without obesity. Additionally, the investigators will investigate the underlying mechanisms involved in detail. This study will provide valuable insights into the role of obesity in severe COVID-19 and potentially inform therapeutic strategies for at-risk populations.

The aim EXACT@Home is to create an evidence-based health program using e.g. questionnaires, a digital health platform and multiple digital devices to further improve the assessment of patients diagnosed with severe asthma. By better charting treatable traits (e.g. poor adherence, physical inactivity, dysfunctional breathing), we expect to improve the indication for the use of biologics. One the devices that will be used is also a medicinal product: a digital inhaler, which monitors adherence and inhaler technique through its connected application and aims to improve adherence and inhaler technique with reminders and notifications. Next to this an activity tracker, hand-held spirometer and FeNO measuring device will be used. The information of the devices will be collected in a Personal Digital Healthcare Environment (PDHE). Patients diagnosed with severe asthma according to the regional asthma Multi-Disciplinary Team Meeting (MDTM) eligible for a treatment with biologics will be included. Half of the patients will immediately receive a biologic. The other half will first undergo the systematic assessment including home monitoring (=EXACT@home) and afterwards a treatment will be chosen based on this evaluation: optimization of treatable traits when present and/or biologics. The chosen treatment of both, the intervention and control group, will be evaluated during 11-12 months.

The primary objective of this study is to reduce respiratory tract infections and wheezing in moderate-late preterms in the first years of life by bacterial lysate administration. Next to determine the correlation of biological markers with respiratory symptoms, immune protection and treatment effect.