Leiden researchers have developed a groundbreaking model to advance cancer immunotherapy. Using a 3D printer, they create mini-tumors within an environment that closely mimics human tissue. They have also developed a method to monitor real-time interactions of these mini-tumours with immune cells during…

Last weekend, all university buildings were closed and the university systems were unavailable. The reason for this was the major maintenance of the university network. The network’s core needed to be shut down for this, including all supplies and services. A large group of staff from ISSC as well as…

As of 1 July, toxicologist Mirjam Luijten from the Dutch National Institute for Public Health and the Environment (RIVM) starts as professor by special appointment at the Leiden Academic Centre for Drug Research (LACDR).

Do you recall all those drugs that were hastily proposed as potential treatments for COVID-19? In the event of a future pandemic, the goal is to offer an effective treatment more quickly and efficiently. To achieve this, a team led by Coen van Hasselt is developing a platform that can speed up the process…

While tens of thousands of visitors dance to deafening music, a team of Leiden psychologists are trying to collect data for their research at Lowlands. How do festivalgoers experience a virtual trip? And what role do factors such as too little sleep and whether they have experience with psychedelics…

2,240 plant extracts from 1,299 different plant species of Dutch origin. That’s the collection of the Dutch Extract Library, which has recently been transferred to the Institute of Biology Leiden. To plant biologist and contact person for this library Pingtao Ding this is a true treasury. ‘To bring…

Optimised antibiotic combinations can combat bacteria more effectively while also slowing the development of resistance. Scientists from five European countries are joining forces to identify such combinations and provide tools for others to do the same. The project is led by Professor Coen van Hasselt…

Erection problems can have a huge impact on quality of life and health, but current diagnostic methods are painful, uncomfortable and technologically outdated. PhD candidate Evelien Trip has developed a new device that can measure erections more comfortably and painlessly.

Scientific Director of the Leiden Academic Centre for Drug Research (LACDR) Hubertus Irth: ‘We test substances and look for new concepts for treating disease.’

There are more molecules that could conceivably be candidate drugs than there are stars in the universe. How can we ever efficiently identify those molecules? Professor of AI and Medicinal Chemistry, Gerard van Westen: ‘I’m going to use artificial intelligence as the co-pilot to make an automated search.’…

How does an embryonic stem cell decide if it becomes a heart cell or a kidney cell? That’s the question computational biologist Maria Mircea studied for her PhD research. She looked at the inside of individual cells to analyse how they change. This is what she discovered.

‘We’re going to see each other again on campus. We’re so pleased, but we do have to say safe.’ Rector Magnificus Hester Bijl is looking ahead to the new academic year, which begins on 6 September. No more 1.5m distancing, but we do have to take responsibility for other people’s safety.

Researchers from Leiden University Medical Center (LUMC) and the Leiden-based biotech company Ncardia have joined forces to develop a new platform that enables the automated production of 3D cardiac microtissues. This platform will allow large numbers of drugs to be tested quickly

Before patients can take a pill, scientists often spend years in the lab developing and testing a candidate drug. That often includes experiments with laboratory animals. As head of the rodent facility, Ilze Bot and her colleagues ensure that these experiments are conducted in an ethically responsible…

Effectively treating a severe case of pneumonia is often challenging. Identifying the pathogen behind it can be difficult. PhD candidate Ilona den Hartog tried something new: ‘We searched for answers in substances our own body produces.’ PhD defence on 17 September.

How safe are the nanoparticles in transparent sunscreen, anti-odour socks and bacteria-resistant plasters? Although microbes are present on all organisms, the tools that estimate the safety of nanomaterials still hardly take them into account. Bregje Brinkmann explored the role of these microbes during…

Leiden University is part of a Dutch consortium that will receive 4.7 million euros from NWO to build a facility that makes controlled, thin layers of material. The facility can produce small and large films, something that is globally unique. And that is key to scaling up, for example, new catalysts…

Personality is genetic in zebrafish: risk-taking parents have risk-taking children. These are the findings of research by Christian Tudorache and his team published in BMC Neuroscience.

Since its discovery thirty years ago, it remained a mystery: how does the body’s own marijuana move between nerve cells in the brain? Mario van der Stelt and his research group have now uncovered the answer. This insight could aid the development of new treatments for pain and neurological disorders…

Various Leiden researchers have been awarded a European grant to explore the commercial or societal potential of previous research.

Is polder rice a feasible circular alternative to cows on peat soil? In May, an experimental trial began, with researchers from Leiden University and Wageningen University & Research (WUR) planting around 3,000 rice plants at the Polderlab near Leiden. The researchers aimed to test rice as a middle…

People can be easily mislead with graphs. But they don’t necessarily stay misled, the research shows.

Innovations only achieve true success when people actually use them. PhD researcher Max van Haastrecht developed a cybersecurity app for small businesses and learned how essential it is to align technology with real-world practice.

Tapping to a rhythm, recognizing sound patterns and enjoying music: For people, it is common sense. But is this also the case for animals? It is the research topic of Michelle Spierings, a researcher at the Institute of Biology Leiden, and it is nominated for the Klokhuis Wetenschapsprijs.

Four Leiden researchers have been awarded Proof of Concept grants by the ERC. These grants, each worth 150,000 euros, help researchers translate the findings of previous ERC projects into innovative practical applications.

Our lecturers are back on campus sooner than the rest of the staff. Away from their screens and in live contact with students: many lecturers are relieved, but some are concerned. Have sufficient steps been taken at our teaching locations? What about ventilation? We spoke to Michel Leenders who, as…

Genetically modified organisms (GMOs) could be useful allies in the fight against critical environmental problems. Could because the use of GMOs is strictly regulated at the moment. A Leiden student team is now trying to make these GMOs safer with the aid of an ingenious lock.

Cookware handles, electrical plugs, brake pads. Unlike other plastics, these ‘thermosets’ cannot simply be melted down and reshaped, making them difficult to recycle. Chemist Roxanne Kieltyka and her team are now exploring a way to make these materials recyclable, potentially transforming the way we…

Can humans sense where north is, using what is known as magnetoreception? This question had master’s student Björn Keyser (Media Technology) so intrigued that he started crowdfunding to be able to study this together with the California Institute of Technology.

Leiden University's Kiem grant is designed to give new interdisciplinary ideas from staff a boost. Thanks to the grant, Jelle Brands and Nathan Saucier were able to test the research possibilities of a hyper-realistic 3D environment. With promising results.

Good research means looking beyond disciplinary boundaries, said Professor of Molecular and Cellular Biochemistry Remus Dame in his inaugural lecture on 10 May. Processes that take place on DNA shouldn’t only be researched in a test tube but also in living cells, for instance.

3 October University has become something of a tradition: a bit of science among the Leidens Ontzet celebrations. During the new and improved edition, the WetenschapsWarenMarkt (Science Market), visitors spoke to researchers about the nitrogen problem, making organs and the city’s connections with A…

A single tiny molecule that can destroy flu, corona, HIV and Zika viruses? Yes, it really does exist. Biophysicist Niek van Hilten, who will receive his doctorate on 14 September, contributed to this discovery.

Just like the professional riders from the Jumbo-Visma team, amateur cyclists will soon be able to analyse and improve their performance. Leiden data scientists working with the cycling team are making their smart data model available so that every serious cyclist can keep track of their fitness.

Designing innovative algorithms, thinking outside the box, and brainstorming over coffee with his colleagues — this is what physicist Stefano Polla enjoys most. His success shines through in his nomination for the C.J. Kok Jury Award 2024 for PhD thesis of the Year.

Last week’s sunny Lowlands festival was not just an occasion for partying and dancing. Visitors were also given a glimpse – as test volunteers – into scientific research. How do you conduct research on fear and silent communication at a festival?

ESA’s space telescope Gaia, which maps the Milky Way, completes its active phase of scanning the sky on 15 January. Over the past decade, Gaia has made more than three trillion observations of about two billion stars and other cosmic objects. ‘Gaia is already the discovery machine of the decade,’ Leiden…

If you need any help with your research or if you encounter problems during your PhD track, Leiden University provides several different types of support for PhD candidates. There are also groups, networks and communities in which you can meet other PhD candidates.

Master

Master

As a PhD candidate, you were primarily hired to do research, although you will probably also have to do some teaching. The partial University Teaching Qualification (Basis Kwalificatie Onderwijs, BKO) certificate provides recognition that a PhD candidate has gained knowledge and experience as a teacher.…

To help you make the impact or valorisation of your scientific research more clearly apparent, we have created a Leiden Impact Matrix.

Regardless of whether you work at a desk or in a lab, all workplaces have their risks. As your employer, the University aims to create a healthy workplace and to limit possible health risks. Here you will find the main risks and measures that we take to reduce them.

The integrity and reliability of academic research are of fundamental importance to the University. All parties, both within and outside the University, must be able to have confidence that our research is conducted in a scrupulous, fair, verifiable, impartial and independent manner.

Active learning is one of the ambitions mentioned in the University’s educational vision (Learning@LeidenUniversity).

For the academic year 2025-2026, nine (teams of) teachers will receive a Grassroots or Grass shoots grant. Here you can read about their projects.

Communication, Working effectively, Transferable skills

While the Netherlands was in lockdown because of the coronavirus, PhD candidate Koen Rijpkema began his research into the same virus. In the lab, he developed molecules that can inhibit an important viral enzyme.

Chemotherapy, but without hair loss or extreme fatigue. It may be possible if the toxic drug only becomes active where it is ‘switched on’ by light. Matthijs Hakkennes has helped bring that idea closer to reality and obtained his PhD cum laude. ‘I received many thank-you emails from China and Bangla…