Alzheimer's disease (AD) is the most frequent neurodegenerative disorder and the primary cause of dementia. The neuropathological features of AD include the occurrence of senile plaques, neurofibrillary tangles, decreased synaptic density, and loss of neurons. An obstacle in the study and treatment…

Researchers need to work in specialized environments when they work with dangerous bacteria and viruses. These microbes spread easily, so only in labs with a high biosafety levels they can be studied. Unfortunately, to look at the microbes properly, expensive microscopes are needed that are not always…

PhD defence

We know this, but we don’t act on it: eat healthily, move more, address our stress levels and sleep well. Internist and Professor of Diabetology Hanno Pijl is fascinated by the effect that a healthy lifestyle can have on health. He researches how this lifestyle is achievable and satisfying, for patients…

Promotor: J. van der Greef, T. Hankemeier; Co-promotor: H.A. van Wietmarschen

To explore the potential of marine microorganisms as producers of novel antimicrobial agents and as bioprotectants in aqua- and agriculture, using an integrative, ecology-based strategy for bioprospecting.

Up to 50% of individuals with Parkinson's disease develop cognitive impairment over time; this study explores the use of 'practice effects' on neuropsychological tests as an early predictor of cognitive decline.

How are the epidermal lipid pathways involved in health and disease.

Leiden University researchers and their collaborators report the development of new research frameworks that use day-to-day smartphone behavior gathered from a large sample of healthy people to help understand aging, and how aging alters with epilepsy and stroke. These reports occupy two back-to-back…

We aim to understand ion homeostasis in the model eukaryote S. cerevisiae.

Which brain cell does what, when Parkinson's disease arises? It won't be long before this jigsaw is solved piece by piece. Ahmed Mahfouz, computational biologist, combines bio-knowledge from Leiden with algorithms from Delft and is getting closer to finding the key.

New or improved treatments for chronic and acute illness.

In this thesis, two potential therapeutic targets for diabetic nephropathy were dentified and investigated. First, we show that glomerular clusterin is upregulated in diabetic nephropathy and demonstrated that recombinant clusterin protein can protect the podocytes against oxidative stress in vitro.…

The skin is our natural barrier and lipids are a key part of this barrier. In the outer skin layer, the stratum corneum (SC), lipids form a densely organized structure dependent on the composition of these lipids.

How is inflammation in tuberculosis controlled by interplay between autophagy and inflammasome signalling?

Using artificial intelligence to find new antibiotics. With that, researchers from Leiden University are nominated by magazine KIJK for the Best Tech-idea of 2021. From September 14 onwards people can vote to crown one of the nominees as the winner.

Inflammatory skin diseases such as psoriasis and atopic dermatitis can severely impact both the physical and social aspect of a patient’s life. Aberrant inflammatory responses are thought to be a major causative factor in these disorders, but an abundance of different factors contribute to the development…

Plant biologist Pingtao Ding, assistant professor at the Institute of Biology Leiden (IBL), has received a 2.4 million European grant from the European Research Council (ERC). This ERC Starting Grant for promising young researchers allows him to unravel the molecular mechanisms by which plants resist…

Inflammatory skin diseases such as psoriasis and atopic dermatitis can severely impact both the physical and social aspect of a patient’s life. Aberrant inflammatory responses are thought to be a major causative factor in these disorders, but an abundance of different factors contribute to the development…

The research described in this thesis combines the latest insights in lysosomal function with lysosome centred cell signalling.

To make the right clinical decisions or develop effective diagnostic tests and treatments, it is important to understand the underlying mechanisms of a condition or behavior.

About one and a half million people worldwide die each year from tuberculosis. For thirty years, therapy with antibiotics has been the same, while it takes far too long and can lead to resistant pathogens. Leiden researchers from four institutes are now joining forces to develop more effective and efficient…

Professor of Ultrastructural Biology Ariane Briegel has received a grant in the NWO Open Competition Domain Science in the XS category. This grant emphatically encourages curiosity-driven and bold research with a maximum of 50,000 euros.

Identifying novel antibiotic compounds to tackle antibiotic-resistant bacteria. Researchers from Leiden University and VU Amsterdam will unite through a project now funded by NWO’s Open Technology Programme (OTP), which awarded the collaboration nearly one million euros.

Health workers have always sought ways to fight disease in vulnerable groups in the population. It is now clear that such research also benefits more prosperous countries. African worm infections and innovative thermometers have shown Leiden researchers how to fight diseases of affluence and keep health…

How do mycobacteria subvert the defenses of host immune cells?

The opportunity to explore a new, exciting research topic. That is how Lennart Schada von Borzyskowski describes his successful application for the NWO XS grant. It comprises 50,000 euros, which the researcher from the Institute of Biology Leiden (IBL) will spend on investigating a more sustainable…

The aim of this project is to explore the use of statistical interaction models to quantify cross-omics and omics-drug interactions in large-scale clinical and experimental datasets

Why do some bacteria lose their protective cell wall under the influence of stress? Microbiologist Dennis Claessen of the Institute of Biology Leiden receives a Vici grant of 1.5 million euros from the Dutch Research Council (NWO) to investigate this paradoxical feature.

Leiden biologists have shown that a gene present in plants, animals and yeasts does play an important role in plants, although for years the gene was considered unimportant. It turns out the gene plays a crucial role in the development of vascular tissue in plants. Publication in Nature Plants on 11…

Harvesting rice from the same field, without planting new rice plants? A discovery may bring this scenario closer. Leiden scientists have discovered a gene that allows annual plants to grow after flowering, instead of dying. Publication on 13 April in Nature Plants.

In order to gain insight into the structure and function of the molecular complexes involved in chemotaxis, we use electron cryotomography (ECT). This technique allows us to directly study microbes in their native state at resolutions capable of visualizing individual proteins.

The central question of this Vici proposal is to investigate if, and how actinobacteria exploit life without a cell wall.

Producing offspring of a crop without sowing and that is even bigger than the parent plant. According to Leiden researchers this can be achieved by overstimulating a single gene that rejuvenates cells, including bringing them back to the embryonic phase.

Overkleeft

The ideas underlying this thesis are that lipidomics may improve the diagnosis of liver metabolic diseases, and can provide further insights into the underlying pathophysiology of these diseases.

Inaugural lecture

The predication of the effect (efficiency and toxicity) of a drug in a patient is very important in (i) clinical decision support and (ii) the development of novel drug treatments.

Prediction of human (CNS) target site concentrations in health and disease In the vision of Prof. de Lange we will only be able to predict human (central nervous system, CNS) target site concentrations and effects if we perform systematic, condition-dependent, integrative, and strictly quantitative…

We perform multidisciplinary research at molecular, cellular, and organismal levels of animal biology to increase fundamental understanding of health and disease.

Up to 45% of patients with Parkinson's disease experience impulse control disorders, characterised by a loss of voluntary control over impulses, drives or temptations. This study aimed to investigate whether previously identified genetic and psychiatric risk factors interact towards the development…

Can drugs that target host signaling pathways be used to eradicate antibiotic-resistant bacteria?

Researchers at Leiden University have made a breakthrough in the study of the hereditary Pompe disease. Together with colleagues in York, they have developed a molecule that binds to the enzyme that is key to the progress of the disease. The findings have been published in ACS Central Science.

What are the host immune defence mechanisms that control intracellular infections and how are these subverted by pathogens?

The goal of pre-clinical development is to bridge the transition from lead compounds to clinical candidates by comprehensively characterizing safety, efficacy, and pharmacological properties. Once a lead compound demonstrates promising activity in disease models, it enters pre-clinical development where…

How do plant defense genes get activated?

In this thesis, we describe the potential of cell mechanical phenotyping for immune cell characterization, diagnosis, drug testing, as well as treatment of disease.

Chronic inflammatory skin diseases such as psoriasis and atopic dermatitis affect both the physical and psychological well-being of millions of patients, leading to persistent symptoms like itchiness and sleeplessness. These conditions often result in decreased productivity and quality of life overall,…

Breast cancer (BC) is a clinically and biologically heterogeneous disease.

PhD defence