236 search results for “bacterial” in the Public website
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Quest for new antibiotics
Gubbens
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Mechanisms and consequences of horizontal gene transfer in cell wall-deficient cells of Kitasatospora viridifaciens
The bacterial cell wall is a nearly universal structure that offers protection and gives the cell its shape. However, environmental stressors, such as cell wall-targeting antibiotics and hyperosmotic conditions, can induce bacteria to shift to a wall-deficient state. It is unknown whether the lack of…
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Cryotomographic visualization of symbiosis initiation in the Euprymna scolopes-Vibrio fischeri association
The overall aim of this project is to understand, on the molecular level, how the bacterium V. fischeri cells interacts with their squid host.
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Anthropogenic effects on links between macro-invertebrate diversity and ecosystem functioning
How are links between macro-invertebrate diversity and ecosystem functioning influenced by anthropogenic pressures?
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Imaging of biomaterial-associated inflammation and infection using zebrafish
Which immune mechanisms are involved in host defense against Staphylococcal infection?
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Biosafety Level 3 laboratory
Within the Leiden University Medical Center (LUMC) several research projects use pathogenic microorganisms of risk group 3. For working with these pathogens, the LUMC has a high containment research lab to safely perform the experiments for man and environment.
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Efficient and flexible platform to isolate and study bacteriophages
We aim to develop a microfluidic platform that can parallelize testing the performance and characteristics of pure, mixed and environmental bacteriophage samples.
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Responding to environmental cues: the adaptive qualities of chromatin compaction proteins
Promotor: M. Ubbink, Co-Promotor: R. T. Dame
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Chemistry & Chemical Biology approaches toward novel cyclic peptide antibiotics
Can cyclic peptides provide a new generation of antibiotics?
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Nano shapes micro : Impacts of metallic nanoparticles on microbial communities
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.
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Ariane Briegel
Science
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The battle against antimicrobial resistant bacterial infections - next stage development of antimicrobial peptides
PhD defence
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Research
The current projects of the Molecular Physiology group focus on proteins of the endocannabinoid system, kinases and antibacterial targets. MSc- and BSc-students can contact Jessica van Krimpen-Kraaijenoord to apply for research internships.
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Glucocorticoid modulation of the immune response
Unraveling the immune-suppressive actions of drugs like prednisone.
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Less is more: reduced mycelial heterogeneity for improved production of enzymes and antibiotics
How can cell wall engineering approaches be used to improve streptomycetes for industry to make new antibiotics?
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Respiratory-chain enzymes
Many metalloenzymes that are key to bioenergetics are membrane enzymes, with canonical examples the complexes I, II, III and IV in the mitochondrial inner membrane. To study these enzymes in a native-like lipid membrane environment, we aim to develop novel bioelectrochemical techniques.
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PhD Theses
A full overview of MacBio PhD Theses.
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The dynamic organization of prokaryotic genomes: DNA bridging and wrapping proteins across the tree of life
Every organisms in the tree of life faces the same challenge: the length of its DNA exceeds the volume of the cell it needs to fit in. Several strategies have evolved to solve this problem, one of them being the expression of proteins that bind and organize the DNA.
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In Pursuit of Next-Generation Lipopeptide Antibiotics
Can new variants of daptomycin and the polymyxins be found?
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INFLANET - Training European Experts in Inflammation: from the molecular players to animal models and the bedside
How is inflammation in tuberculosis controlled by interplay between autophagy and inflammasome signalling?
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Institute of Biology Leiden
The Institute of Biology Leiden (IBL) is an internationally oriented institute for research and education in biology. We are part of the Faculty of Science at Leiden University.
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Fast vaccine design and development based on correlates of protection (COPs) Influenza as a trendsetter
New and reemerging infectious diseases call for innovative and efficient control strategies of which fast vaccine design and development represent an important element.
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Amphiphilic miktoarm star copolymers
Within this project, PeptoMiktoStars were realized through an orthogonal protecting group strategy and should be investigated further regarding their potential as drug delivery systems in the field of drug delivery to inflamed areas in cancer, bacterial infections or autoimmune diseases.
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Quantitative pharmacological modelling for optimizing treatment of sepsis
Sepsis is a life-threatening condition caused by a dysregulated host response to infection, it is associated with significant morbidity, mortality, and with a high financial burden on global healthcare systems. Bacterial infections are the primary cause of sepsis, but the growing prevalence of antimicrobial…
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The innate immune response against mycobacterial infection: analysis by a combination of light and electron microscopy
Promotores: Prof.dr. H.P. Spaink & Prof.dr. P.C.W. Hogendoorn, Co-promotor: Dr. M.J.M. Schaaf
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Breaking the witches' spell: towards steering the soil microbiome for volatile-mediated control of the root parasitic weed Striga
Striga hermonthica, commonly known as witchweed, infests major cereal crops in Sub-Saharan Africa causing severe yield losses and threatening the livelihood of millions of resource poor farmers.
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Exploring and exploiting the mechanism of mycelial pellet formation by Streptomyces
Promotor: G.P. van Wezel
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The architects of crenarchaeal chromatin: A biophysical characterization of chromatin proteins from Sulfolobus solfataricus
Promotor: Prof.dr. J. Brouwer, Co-promotor: Dr. Remus Th. Dame
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Structural characterization of the cell envelope of Actinobacteria under changing environments
Bacteria have the ability to alter their morphology in order to adapt to changing environments.
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Autophagy and Lc3-associated phagocytosis in host defense against Salmonella
Control of infectious diseases poses continuous challenges for human health.
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Individualized dosing of aminoglycosides and glycopeptide antibiotics in (morbidly) obese patients (AMIGO)
Timely, adequate and optimal treatment of infectious diseases is essential for the survival of patients with bacterial infections (Surviving Sepsis campaign).
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Screening of animal venoms for antimicrobial compounds
Can animal venoms yield novel antimicrobial peptides?
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Graduate School of Science
Are you graduating at the Faculty of Science? Or are you supervising a PhD student? At the Graduate School of Science you find support at every phase of your PhD.
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Combatting antibiotic resistance in a clever way
When you become very good at one thing, that sometimes comes at the expense of something else. Such trade-offs also apply to bacteria. When becoming more resistant to one antibiotic, bacteria can sometimes become more sensitive to another. Linda Aulin, PhD candidate in the pharmacology group of Coen…
- Publication highlights
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Chromatin organization & dynamics (Dr. Remus Dame)
Throughout all domains of life, from bacteria and archaea to eukaryotes, genomes adopt well-organized three-dimensional structures that can change in space and time to accommodate preferred transcriptional programs for environmental adaptation, the maintenance of cellular identity and differentiation…
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HARVEST: Plant foods in human evolution
The HARVEST project explores the dietary choices that our hominin ancestors and relatives made, by recovering information on what they consumed, and how factors like environmental variation, intrinsic biology, and development of food processing technologies could have influenced their decisions.
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Molecular Signatures of the Evolving Immune Response in Mice following a Bordetella pertussis Infection
Worldwide resurgence of pertussis necessitates the need for improvement of pertussis vaccines and vaccination strategies.
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Centre for Microbial Cell Biology
The CMCB brings together microbial cell biology expertise in Leiden. It aims at optimal resonance between the groups and maximal exploitation of the available infrastructure and to develop innovative cross-boundary technology platforms.
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Piecewise deterministic Markov processes: an analytic approach
Promotor: S.M. Verduyn Lunel, Co-Promotores: S.C.Hille, O.W. van Gaans
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Mycobacterial cell wall-deficiency and its role in the persistence of tuberculosis
What is the role of cell wall-deficiency in the persistence of tuberculosis?
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The Function of Toll-like receptor 2 in Infection and Inflammation
The function of TLRs in innate immunity has aroused worldwide attention soon after its discovery. Because of the broad functions of TLR2 in innate immunity, the drive for the development of TLR2-targeted vaccines or therapeutic treatments has accelerated in the last decades.
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Discoveries in 2023
From nanoparticles to colliding ice planets and from biological origami to new x-ray scanner techniques: this year again, our scientists have made wonderful discoveries. From the largest numbers to the smallest molecules and from the oldest galaxies up to the latest algorithms, take a look at each institute's…
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Chromatin organisation & dynamics
The genomic DNA of every organism is organized and compacted in order to fit inside the cell. This is achieved by the joint action of numerous architectural proteins that aid in folding the genome. Genome folding is tightly interconnected with transcription, with genes in certain regions being silenced,…
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New IBL-professor in Ultrastructural Biology: Ariane Briegel
Ariane Briegel has been appointed Professor in the fìeld of Ultrastructural Biology within the Faculty of Science at the Institute of Biology from the 1st of December 2015. Her expertise is in using electron cryotomography to study how microbes sense and respond to their environment.
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Key publications
Key research articles and book chapters of the Chromatin group.
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Delivery of Biotherapeutics
The Delivery of Biotherapeutics research group is led by Prof. Matthias Barz and focusses on the synthesis and characterization of polypept(o)ids and their application in nanomedicine to improve existing therapies or enable novel diagnostic or therapeutic approaches.
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Novel immunomodulatory drugs for tuberculosis treatment
Can drugs that target host signaling pathways be used to eradicate antibiotic-resistant bacteria?
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Self-assembly properties and applications of metal-binding peptides and proteins
It is estimated that approximately 30% of all proteins require a metal to function. Investigating the relationship between metal-binding and peptide/protein folding allows us to uncover fundamental rules for creating metallo-peptides and proteins, which in turn leads to the creation of new structures,…
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Cell Observatory: visualising structures of life
From molecule, to cell, to organism. The high-level drug research at the Cell Observatory aimes at reducing the spread of cancer and developing new medicines for tuberculosis.