2,449 search results for “cell chemistry” in the Public website
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Evani Lachmansingh
Science
e.t.lachmansingh@liacs.leidenuniv.nl | +31 71 527 2727
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Alexander Kros
Science
a.kros@chem.leidenuniv.nl | +31 71 527 4234
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Bioorthogonal Antigens as Tool for Investigation of Antigen Processing and Presentation
In order to be able to develop effective medicine and treatments to prevent or cure autoimmune diseases or cancer we need to understand the mechanisms how they arise and what drives their course.Unravelling the fundamental molecular mechanisms influencing the onset and course of diseases such as allergies,…
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Cell architecture and pathways for parallel secretion in the filamentous fungus Aspergillus niger
Research aims: Identification of key genes involved in programming the cellular architecture of A. niger & Genetic engineering of A. niger in order to improve its secretory capacities and rheological behavior under industrial fermentation conditions.
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Scrum enhances learning in chemistry education
Context-based learning has been implemented in secondary chemistry education. Hans Vogelzang, PhD at ICLON, reseached whether Scrum methodology might support creating context-based lessons. Scrum appears to be beneficial to learning outcomes. Defence on 10 November.
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microneedle arrays effectively induce ovalbumin-specific antibody and T-cell responses in mice
The aim of this work was to study the applicability of antigen-coated pH-sensitive microneedle arrays for effective vaccination strategies. Therefore, a model antigen (ovalbumin) was coated onto pH-sensitive (pyridine-modified) microneedle arrays to test pH-triggered antigen release by applying the…
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lic-acid)-based particulate vaccines: particle uptake by dendritic cells is a key parameter for immune activation
Poly(lactic-co-glycolic acid) (PLGA) particles have been extensively studied as biodegradable delivery system to improve the potency and safety of protein-based vaccines. In this study we analyzed how the size of PLGA particles, and hence their ability to be engulfed by dendritic cells (DC), affects…
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Douwe Atsma
Faculteit Geneeskunde
d.e.atsma@lumc.nl | +31 70 526 2020
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Improving the filamentous fungus Aspergillus niger as cell factory for starch degrading enzymes
We aim to develop A. niger strains that produce more starch degrading enzymes even in the absence of starch.
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Synthesis and applications of cell wall glycopolimer fragments from Staphilococci and Enterococci
Carbohydrates are present on the surface of bacteria making them suitable antigen candidates for vaccine development. This thesis deals with the synthesis of two carbohydrate-based components; the capsular polisaccharide of S. aureus type 5 and teichoic acids from staphilococci and enterococci speci…
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Zwitterionic oligosaccharides: charging the immune system
How are carbohydrates processed by the immune system? Can carbohydrates be used to trigger T-cells against other conjugated antigens? Can they be used as adjuvants?
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Marie-Jetta den Otter
ICLON
m.den.otter@iclon.leidenuniv.nl | +31 71 527 1672
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Making the invisible visible with ‘click chemistry’
Sander van Kasteren (Professor of Molecular Immunology) makes the invisible visible. He will explain more in his inaugural lecture.
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Synthetic peptides, nucleic acids and molecular probes to study ADP-Ribosylation
This thesis presents the first synthetic peptides ADP-ribosylated on serine, threonine, tyrosine, arginine and cysteine.
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poly(i:C): a defined adjuvanted vaccine for induction of antigen-specific T cell cytotoxicity
For effective cancer immunotherapy by vaccination, co-delivery of tumour antigens and adjuvants to dendritic cells and subsequent activation of antigen-specific cytotoxic T cells (CTLs) is crucial. In this study, a synthetic long peptide (SLP) harbouring the model CTL epitope SIINFEKL was encapsulated…
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The career choices of cells
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.
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How bittersweet sugar chemistry targets pathogens
The challenge is considerable, but so is the satisfaction when it succeeds: creating complex sugar molecules that play a role in biology.
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Bacteria under stress can live without cell wall
Thread-like bacteria make cells that no longer have a cell wall under the influence of osmotic stress. A remarkable discovery, since the cell wall serves as a protection barrier for bacteria. It could also help to explain how pathogenic bacteria can hide in our body from our immune system. A team of…
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Frank Schaftenaar
Science
f.h.schaftenaar@lacdr.leidenuniv.nl | +31 71 527 5134
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Education
Education & outreach
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Willie Peijnenburg
Science
peijnenburg@cml.leidenuniv.nl | +31 71 527 5172
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Bacteria without cell wall gobble up DNA from environment
A bacterium hiding from the immune system and picking up bits of DNA from its environment. The result: gaining new traits, such as better protection against antibiotics. Fortunately, we have not found such a damning scenario yet. However, PhD student Renée Kapteijn did find the first clues, which…
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How cells talk by pulling on a fibre network
Mechanics play a larger role in blood vessel formation, and other developmental biology, than previously thought. Cells appear to respond to mechanical signals, such as pressure. Through the extracellular matrix, a network of fibrous proteins, cells can supposedly exchange those mechanical signals over…
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Véronique Ongenae
Science
v.m.a.ongenae@biology.leidenuniv.nl | +31 71 527 5075
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Careful restart Cell Observatory and labs
With the necessary measures, researchers restart their work in various laboratories. The Leiden Cell Observatory is one of the places where scientists resume their lab work.
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300 million euros for new international stem cell consortium
The Leiden University Medical Center (LUMC), the Danstem Institute from the University of Copenhagen and the Murdoch Children’s Research Institute in Melbourne have received 300m euros from the Novo Nordisk foundation. The aim of this new international consortium is to bring stem-cell based therapies…
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Three new professors for the Leiden Institute of Chemistry
With Sylvestre Bonnet, Jeroen Codée and Remus Dame, the Leiden Institute of Chemistry (LIC) will be getting no less than three new professors. Bonnet will become professor in Bioinorganic Chemistry, Codée professor in Organic Chemistry and Dame professor in Molecular and Cellular Biochemistry.
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Modified caffeine molecules help medical research move forward
Before researchers can develop targeted drugs, they need to know exactly how a disease works. Biochemist Bert Beerkens created molecules that allow them to find out. He used caffeine as the basis for new molecules that enable research into certain receptor proteins on cells.
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Arjan de Koning
Science
koning@cml.leidenuniv.nl | +31 71 527 5653
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Femke Reidsma
Faculteit Archeologie
f.h.reidsma@arch.leidenuniv.nl | +31 71 527 1680
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Nicola Thome
Science
n.u.thome@biology.leidenuniv.nl | +31 71 527 4395
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Lars Jeuken
Science
l.j.c.jeuken@lic.leidenuniv.nl | +31 71 527 4755
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Sander van Kasteren
Science
s.i.van.kasteren@chem.leidenuniv.nl | +31 71 527 2727
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Target Discovery
The goal of target discovery is to identify and validate proteins and biological pathways that are involved in the disease process. Modulating these target proteins and pathways with small molecules, therapeutic proteins or other biomolecules (e.g. mRNA) could deliver an effective and safe drug or v…
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Roxanne Kieltyka elected as one of Talented 12 in chemistry
Leiden chemist Roxanne Kieltyka is part of the 2018 Talented 12 list of the American Chemical Society. That was announced by the journal Chemical & Engineering News on 19 August.
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About the programme
An attractive feature of the MSc Chemistry programme at Leiden University is the great flexibility of the study programme, allowing students to put together a tailor-made programme following their personal interests. Within the limits set by the programme, students can make their own choices and adjust…
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Christine Mummery
Faculteit Geneeskunde
c.l.mummery@lumc.nl | +31 71 526 9300
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Tessa Vergroesen
Science
t.m.vergroesen@biology.leidenuniv.nl | +31 71 527 4912
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Cells ‘walk’ to firm ground
A new mathematical model may explain how body cells get their shapes and what makes them move within a tissue. The model provides fundamental knowledge for applications in tissue engineering, amongst other things. Publication in open-access journal iScience.
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Leiden scientists map cell types in fetal kidney
Kidney failure is a serious issue because kidneys cannot regenerate themselves after injury. A possible solution consists of artificially growing healthy kidney tissue. To achieve that, scientists first need to understand kidney development during the earliest stages, in the fetus. Leiden researchers…
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Aggressiveness of cancer cells halted
Zebrafish-human communication shows that cancer cells lacking a signaling protein are less able to develop aggressive metastatic properties. This discovery has been made by molecular cell biologist Claudia Tulotta. PhD defence 14 June.
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Smart chemistry rids anti-cancer drugs of serious side effects
Researchers of the Leiden University Medical Centre (LUMC) and the Leiden Institute of Chemistry have made an important discovery about the commonly used anti-cancer drug doxorubicin. They have found a way to reduce its side effects without sacrificing the effectiveness of the medication. This is encouraging…
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Making cells ultra-heavy
The life of a fibroblast is heavy, but PhD student Julia Eckert makes it 19.5 times heavier, using the Large Diameter Centrifuge at the ESTEC space research centre in Noordwijk.
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Ewa Snaar-Jagalska
Science
b.e.snaar-jagalska@biology.leidenuniv.nl | +31 71 527 2727
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Real-time solid-state NMR spectroscopy inside living cells
Researchers from the Leiden Institute of Chemistry show proof of principle that live-cell structural changes and metabolic processes can be followed in real time with NMR spectroscopy. They performed their study on photosynthetic green algae that are metabolically flexible and can sustain energy generation…
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Caging ruthenium complexes with non-toxic ligands for photoactivated chemotherapy
The main goal of the research described in this thesis was the development of new photoactivated chemotherapy (PACT) ruthenium(II) complexes bearing a non-toxic photolabile ligand.
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Chemical Biology
Chemical biology research at the Leiden Institute of Chemistry is aimed at understanding biological processes at the molecular level to strengthen the knowledge base of human health and disease. The approach to achieve this goal is a fundamental chemical one; with the aid of chemical probes biological…
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Leiden Academic Centre for Drug Research
The Leiden Academic Centre for Drug Research (LACDR) is a centre of excellence for multidisciplinary research on drug discovery and development.
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Chemical biology of sphingolipids: fundamental studies and clinical applications
Overkleeft