Christof J. Majoor

ORCID: 0000-0003-2677-9684
Publications
Citations
Views
---
Saved
---
About
Contact & Profiles
Research Areas
  • Cystic Fibrosis Research Advances
  • Asthma and respiratory diseases
  • Inhalation and Respiratory Drug Delivery
  • Respiratory and Cough-Related Research
  • Neonatal Respiratory Health Research
  • Pediatric health and respiratory diseases
  • Venous Thromboembolism Diagnosis and Management
  • Blood Coagulation and Thrombosis Mechanisms
  • Advanced Chemical Sensor Technologies
  • IL-33, ST2, and ILC Pathways
  • Respiratory viral infections research
  • Coagulation, Bradykinin, Polyphosphates, and Angioedema
  • Tracheal and airway disorders
  • Pneumonia and Respiratory Infections
  • Chronic Obstructive Pulmonary Disease (COPD) Research
  • Allergic Rhinitis and Sensitization
  • Atrial Fibrillation Management and Outcomes
  • Tuberculosis Research and Epidemiology
  • Connexins and lens biology
  • Mycobacterium research and diagnosis
  • Interstitial Lung Diseases and Idiopathic Pulmonary Fibrosis
  • Heparin-Induced Thrombocytopenia and Thrombosis
  • Sodium Intake and Health
  • Mast cells and histamine
  • Delphi Technique in Research

Amsterdam University Medical Centers
2019-2023

University of Amsterdam
2014-2023

Karolinska University Hospital
2020

Respiratory Clinical Trials
2020

The University of Melbourne
2020

RELX Group (United States)
2020

Amsterdam UMC Location University of Amsterdam
2011-2018

Advanced Cell Diagnostics (United States)
2017

Canadian Respiratory Research Network
2016

Radboud University Nijmegen
2006-2007

In vitro drug tests using patient-derived stem cell cultures offer opportunities to individually select efficacious treatments. Here, we provide a study that demonstrates in responses rectal organoids from individual patients with cystic fibrosis (CF) correlate changes two vivo therapeutic endpoints. We measured efficaciousness functional assay rectum-derived based on forskolin-induced swelling and studied the correlation effects. The organoid correlated both change pulmonary response sweat...

10.1016/j.celrep.2019.01.068 article EN cc-by-nc-nd Cell Reports 2019-02-01
Ahmet Uluer Gordon MacGregor Pilar Azevedo V. Indihar Claire Keating and 95 more Marcus Mall Edward F. McKone Bonnie W. Ramsey Steven M. Rowe Ronald C. Rubenstein Jennifer L. Taylor‐Cousar Elizabeth Tullis Lael M. Yonker Chenghao Chu Anna P. Lam Nitin Nair Patrick R. Sosnay Simon Tian Fredrick Van Goor Lakshmi Viswanathan David Waltz Linda T. Wang Yingmei Xi Joanne Billings Alex Horsley Alex Horsley E.F. Nash Marleen Bakker Eva Van Braeckel Petrus Merkus Christof J. Majoor Karen McCoy Joanne Billings Krishna Pancham James Tolle Bryon Quick Ahmet Uluer Emily DiMango A. Vijaya Rao Santiago Reyes Ross C. Klingsberg Celeste Barreto Victor E. Ortega Donna Beth Willey‐Courand C. Schwarz Sivagurunathan Sutharsan Rainald Fischer Jane C. Davies J. Duckers Alex Horsley Simon Doe E.F. Nash Marleen Bakker Harry Heijerman Eva Van Braeckel Petrus Merkus Christof J. Majoor George M. Solomon Christian A. Merlo Jennifer Griffonnet Joseph M. Pilewski Jordan Dunitz Saba Sheikh Ronald C. Rubenstein Daniel Rosenbluth Theodore G. Liou M. Indihar Krishna Pancham Lael M. Yonker Samya Z. Nasr Jennifer Griffonnet Cynthia D. Brown Gregory S. Sawicki Jennifer Ruddy Emily DiMango Bryan Garcia Andrew T. Braun Alex H. Gifford Nighat Mehdi Maria Tupayachi Ortiz Raksha Jain Francisco J. Calimano Jimmy Johannes Cori Daines Jason Fullmer Joel Mermis Christopher Barrios Ngoc P. Ly Brian Casserly Stephan Eisenmann Helge Hebestreit Alexander Kiefer Sivagurunathan Sutharsan Rainald Fischer Gordon MacGregor D. Peckham M.J. Ledson Eva Van Braeckel Petrus Merkus Noel G. McElvaney

10.1016/s2213-2600(22)00504-5 article EN cc-by-nc-nd The Lancet Respiratory Medicine 2023-02-23

Abstract Background Activated eosinophils cause major pathology in stable and exacerbating asthma; however, they can also display protective properties like an extracellular antiviral activity. Initial murine studies led us to further explore a potential intracellular activity by eosinophils. Methods To follow eosinophil‐virus interaction, respiratory syncytial virus (RSV) influenza were labeled with fluorescent lipophilic dye (DiD). Interactions visualized confocal microscopy, electron flow...

10.1111/all.13802 article EN cc-by-nc-nd Allergy 2019-04-01

Asthma is a chronic inflammatory airway disease, associated with episodes of exacerbations. Therapy inhaled corticosteroids (ICS) targets inflammation, which aims to maintain and restore asthma control. Clinical features are only modestly airways inflammation. Therefore, we hypothesized that exhaled volatile metabolites identify longitudinal changes between clinically stable loss control.To determine whether organic compounds (VOCs) as measured by gas-chromatography/mass-spectrometry (GC/MS)...

10.1111/cea.12965 article EN Clinical & Experimental Allergy 2017-06-19

Increasing evidence suggests that patients with asthma have activated coagulation within the airways. Whether this leads to an increase in venous thromboembolic events is unknown. We therefore assessed incidence of mild-to-moderate and severe as compared age- sex-matched reference population. 648 (283 365 asthma) visiting three Dutch outpatient clinics were studied. All completed a questionnaire about diagnosis deep vein thrombosis pulmonary embolism past, their risk factors, history...

10.1183/09031936.00150312 article EN European Respiratory Journal 2012-12-20

Eosinophils drive pathophysiology in stable and exacerbating eosinophilic asthma, therefore treatment is focused on the reduction of eosinophil numbers. Mepolizumab, a humanized monoclonal antibody that neutralizes IL-5 efficiently attenuates eosinophils, proved clinically effective severe asthma but not mild asthma.To study effect mepolizumab virus-induced immune responses asthma.Patients with steroid-naive randomized for numbers, received 750 mg intravenously placebo-controlled...

10.1164/rccm.201803-0461oc article EN American Journal of Respiratory and Critical Care Medicine 2018-09-07

Abstract In the Netherlands, 1.4% of tuberculosis (TB) cases are caused by Mycobacterium bovis. After we admitted 3 patients with M. bovis infections to our reference hospital, conducted a retrospective analysis all disease in Netherlands during 1993–2007. We analyzed data from 231 for clinical, demographic, treatment, and outcome characteristics risk factors. Most were native Dutch (n = 138; 59.7%) or Moroccan 54; 23.4%). Disease was mainly extrapulmonary 136; 58.9%). Although 95 had...

10.3201/eid1703.101111 article EN cc-by Emerging infectious diseases 2011-03-01

Rationale Targeted cystic fibrosis (CF) therapy with lumacaftor/ivacaftor partly restores chloride channel function and improves epithelial fluid transport in the airways. Consequently, changes may occur microbiome, which is adapted to CF lungs. Objectives To investigate effects of on respiratory microbial composition metabolic activity by repeatedly sampling lower tract. Methods This was a single-centre longitudinal observational cohort study adult patients homozygous Phe508del mutation....

10.1183/23120541.00731-2020 article EN cc-by-nc ERJ Open Research 2021-01-14

<h2>Abstract</h2> Elexacaftor/tezacaftor/ivacaftor (ELX/TEZ/IVA) was shown to be safe and efficacious in people with cystic fibrosis (CF) heterozygous for <i>F508del</i> a minimal function mutation (<i>F</i>/MF) or homozygous (<i>F</i>/<i>F</i>) two pivotal Phase 3 trials, significantly improving percentage predicted forced expiratory volume 1 second, Cystic Fibrosis Questionnaire–Revised, Respiratory Domain (CFQ-R RD) scores, sweat chloride concentration. Here, we analyzed the 11...

10.1016/j.jcf.2022.08.018 article EN cc-by-nc-nd Journal of Cystic Fibrosis 2022-09-14

Elexacaftor/tezacaftor/ivacaftor (ETI) is a cystic fibrosis (CF) transmembrane conductance regulator modulator, which has shown efficacy in CF patients (≥6 years) with ≥1 Phe508del mutation and minimal function mutation. In October 2019, ETI became available on compassionate use basis for Dutch severe lung disease. Our objective was to investigate safety of this patient group real-life setting. A multicenter longitudinal observational study conducted examine changes FEV1 , BMI, adverse...

10.1002/prp2.1015 article EN cc-by-nc Pharmacology Research & Perspectives 2022-11-28

We hypothesized that people with cystic fibrosis (CF) who express CFTR (cystic transmembrane conductance regulator) gene mutations associated residual function may benefit from G-protein coupled receptor (GPCR)-targeting drugs can activate and enhance function. used intestinal organoids to screen a GPCR-modulating compound library identified β 2 -adrenergic agonists as the most potent inducers of -Agonist-induced organoid swelling correlated genotype, could be induced in homozygous...

10.1183/13993003.01661-2015 article EN European Respiratory Journal 2016-07-28

The novel cystic fibrosis transmembrane conductance regulator (CFTR) modulators, ivacaftor, lumacaftor, and tezacaftor, are the first drugs directly targeting underlying pathophysiological mechanism in (CF); however, independent studies describing their pharmacokinetics lacking. aim of this study was to develop a quantification method for ivacaftor its 2 main metabolites, lumacaftor plasma sputum using liquid chromatography with tandem mass spectrometry.

10.1097/ftd.0000000000000829 article EN cc-by-nc-nd Therapeutic Drug Monitoring 2020-11-09

Asthma patients show evidence of a procoagulant state in their airways, accompanied by an impaired function the anticoagulant protein C system. We aimed to study effect recombinant human activated (rhAPC) allergic asthma patients. conducted randomised, double-blind, placebo-controlled, proof-of-concept house dust mite (HDM) Patients were randomised receive intravenous rhAPC (24 µg·kg −1 ·h ; n=12) or placebo (n=12) for 11 h. 4 h after start infusion, first bronchoscopy was performed...

10.1183/13993003.00459-2015 article EN European Respiratory Journal 2015-09-17

Ivacaftor has been shown to restore the functionality of S1251N (also known as c.3752G>A) mutated CFTR, which may cause alterations in both airway and gut physiology micro-environment, resulting a change microbiota these organs. The aim present study was analyze effects ivacaftor on microbial community composition subjects with CF carrying one mutation, using 16S rRNA gene-based sequencing approach. In 16 CF, repetitive samples from airways were collected just before, 2 months after, and,...

10.3390/jpm11050350 article EN Journal of Personalized Medicine 2021-04-27
Coming Soon ...