The molecular mechanisms that instigate a healthy cell to become malignant are fueled by (epi)genetic alterations in so-called driver genes.

Promotors: W. Jiskoot; G.J. Witkamp, Co-promotor: M.R. Nejadnik

In this thesis, we used genetically engineered mouse models to identify genes and pathways that are involved in ILC formation and in the development of resistance to FGFR-targeted therapy.

PURPOSE: To monitor the biodistribution of IgG1 aggregates upon subcutaneous (SC) and intravenous (IV) administration in mice and measure their propensity to stimulate an early immune response.

Not ten but fifty Covid vaccines from one vial. This is possible if the vaccination is delivered into the skin rather than the muscle, research by internist and infectious disease specialist Anna Roukens from the LUMC has shown. EenVandaag reported on this important discovery, which could have huge…

Promotores: Prof.dr. H Lenstra, Prof.dr. A Facchini (Padova University)

The current COVID-19 vaccination campaign involves injecting the vaccine into muscle tissue, but injecting a smaller amount of vaccine in the skin might also provide good protection. The #wakeuptocorona crowdfunding campaign has enabled Anna Roukens (LUMC) to examine the safety and efficacy of vaccination…

Promotores: Prof.dr. J. A. Bouwstra, Prof.dr. W. Jiskoot

Promotor: Huub J.M. de Groot, Co-promotor: Francesco Buda

About nine million people worldwide contract tuberculosis each year. Research into new treatment for this disease has received fresh stimulus with more efficient techniques and a new understanding of how the tuberculosis bacteria works.

Leiden researchers are helping develop safe COVID-19 vaccines.

PhD Defence

Dendritic cells (DC) play a prominent role in the priming of CD8(+) T cells. Vaccination is a promising treatment to boost tumor-specific CD8(+) T cells which is crucially dependent on adequate delivery of the vaccine to DC.

Traditionally, vaccines are administered intramuscularly using conventional hypodermic needles, which cause pain and distress. Microneedles are very short needles (smaller than 1 mm) that are practically invisible to the naked eye.

Stem cells can be differentiated into insulin-producing cells.

In this thesis, we will utilize embryonic zebrafish tumour models to understand the interaction between engrafted human cancer cells and macrophages from the host, test drug administration modalities and anti-cancer efficacies of newly-developed PDT and PACT compounds, and test a light-triggered liposomal…

In the near future oral polio vaccine (OPV) will be replaced by inactivated polio vaccine (IPV) as part of the eradication program of polio. For that reason, there is a need for substantial amount of safe and more affordable IPV for low-income countries. Bioneedles, which are biodegradable mini-implants,…

We are developing biology-driven platforms to measure metabolites based on liquid chromatography-mass spectrometry (LC-MS), gas chromatography-MS (GC-MS), and capillary electrophoresis-MS (CE-MS).

Promotores: Prof.dr. G.F.A Kersten, Prof dr. J.A. Bouwstra

Vaccines are an extraordinary category of biopharmaceuticals. They are usually prophylactic and come in many types, from whole bacteria to peptides and nucleic acids. They are very cost effective and almost every human on the planet is vaccinated. The latter mandates that vaccines have to be extremely…

On 19 February 2020, Richard Jiang defended his thesis '‘Greening’ the WTO Ban on China’s Export Duties'. The doctoral research was supervised by Prof. M.C.E.J. Bronckers.

Dissolving microneedles are a subgroup of microneedle types that completely dissolve within the skin. During this dissolving process the vaccine, stored in the needle matrix, is released into the skin.

Promotor: Prof.dr. B. van de Water, Co-promotores: J.W. van der Laan, C.L.E. Siezen

Appropriate animal models for intradermal vaccine delivery are scarce. Given the high similarity of their skin anatomy to that of humans, minipigs may be a suitable model for dermal vaccine delivery.

Vaccination via the skin or the mucosae

Key publications of the Biologics Formulation group

Promotores: Prof.dr. J. Aarts, Prof.dr. J.M. van Ruitenbeek

An overview of the research at the Biologics Formulation group

It’s never too early to start thinking about your future academic career. During your study you should therefore familiarise yourself with the job market, draw up a personal profile and start working on your CV. The staff of the Master's Vitality and Ageing will be happy to help, on all counts. The…

Bet v1, the major allergen in birch pollen, is one of the main causes of allergies such as asthma and rhino-conjunctivitis. Additionally it is the main cause of birch pollen allergy in humans.

Meniere’s disease, a disorder of the inner ear, was first described back in 1861, but there’s still no good test or treatment for it. Tjasse Bruintjes, Professor by Special Appointment of Ear, Nose and Throat Surgery, wants more attention for this mysterious disease. And he wants to tell his fellow…

PhD Defence

Ceramides (CERs), cholesterol, and free fatty acids (FFAs) are the main lipid classes in human stratum corneum (SC, outermost skin layer), but no studies report on the detailed analysis of these classes in a single platform.

This thesis aimed to investigate the impact of exposure dynamics, relative contributions of ENPs(particle) and ENPs(ion), and dosing regimens on the toxicity of ENPs varying in different physico-chemical properties, on the composition and functioning of soil microbial communities.

Atherosclerosis is the most important underlying process that drives cardiovascular disease, and is characterized by an accumulation of cholesterol which triggers an inflammatory response in the vessel wall.

PURPOSE: The aim of the study was to develop a cheap and fast method to produce hollow microneedles and an applicator for injecting vaccines into the skin at a pre-defined depth and test the applicability of the system for dermal polio vaccination.

A research goal for ABS is to develop miniaturized platforms for research in (stem)cell, in-vitro systems and application in clinical and preventive research. Combined with the high throughput, this development will make it possible to study the dynamics of pathogenesis in human and cellular models…

Which immune mechanisms are involved in host defense against Staphylococcal infection?

Microneedles are a promising tool for the painless administration of vaccines through the skin. But, are these minuscule needles really effective? PhD student Pim Schipper of the Leiden Academic Centre for Drug Research investigated various factors of vaccination via the skin and discovered, among other…

Unraveling the immune-suppressive actions of drugs like prednisone.

Can drug screening for tuberculosis treatment be made more efficient?

There are a number of vaccines that require animal testing in their production. Thomas Michiels developed a replacement lab test that allows manufacturers to achieve the same result, without involving animals. The next step is that the test has to be validated by pharmaceutical companies and has to…

How do macrophages and neutrophils contribute to metastatic onset?

Metabolomicshas emerged as an important discipline to study molecular and cellular processes in living cells and organisms with the ultimate aim to obtain an answer to a given biological/clinical question.

Treatment with special stem cells seems to be a good option for suppressing the immune system in organ transplants. Researchers are trying to learn from processes that take place in the human body during pregnancy.

If it’s up to PhD student Guangsheng Du, patients don’t need to worry about big needles anymore. At the Leiden Academic Center for Drug Research (LACDR), he studied the use of microneedles and nanoparticles as a new vaccination system. ‘I want to create a more patient-friendly delivery method.’ He defends…

How do you microscopically image zebrafish larvae? The new free online course ‘Imaging the Vertebrate embryo’ teaches you all about it. Leiden PhD candidates Salomé Muñoz Sánchez and Radoslaw Gora contributed to the course.

This is an Erasmus+ International Credit Mobility project of Leiden University Medical Centre with University of Havana.

Promotor: P.M. Brakefield

In autoimmune diseases such as rheumatism and diabetes the immune system attacks autologous proteins. Leiden researchers are trying to discover how this comes about.