Dr Marjan Van der Woude

PhD

Reader in Microbiology

Role at Hull York Medical School

Dr Van der Woude is a microbiologist with expertise in the molecular microbiology bacteria and bacterial virulence. Her research programme focuses on Gram-negative pathogens and the occurrence, significance and mechanisms of population heterogeneity. The research lab is based in the Centre of Immunology and Infection, and she is part of the newly established York Biomedical Research Institute. She has a range of national and international collaborations, including with non-biologists and crossing disciplinary boundaries, and works with a small company on vaccine development. In addition to research, Dr. Van der Woude is involved in teaching Phase I Hull York Medical School (Lectures, SSIPs) as well as undergraduate students in programmes administered by Biology, including the Biomedical Sciences programme, which is jointly owned between Hull York Medical School and Biology. She has had a range of administrative roles within the University, the Hull York Medical School and Biology. Her national work includes being a member of RCUK panel(s) and being an external examiner.

Research

Molecular mechanisms of bacterial pathogenesis

The success of a bacterial species depends on its ability to grow and survive in a changing and potentially hostile environment. This requires adaptation at both the single cell and population level. We are particularly interested in understanding how behavior of bacterial populations is underpinned by phenotypic heterogeneity. We furthermore apply our expertise to developing and understanding mechanisms of action of novel antimicrobial therapies. We combine molecular biology and genetic approaches with genomics, immunology and modeling, and collaborate with physicists, mathematicians, biochemists, and clinical researchers internal and external to the University as needed to progress our science. To illustrate these research interests of the MvdW lab, some key research questions and associated research projects in the MvdW lab are outlined below.

An aspect of bacterial populations that is only beginning to be fully appreciated is the heterogeneity of single cells in clonal populations. This heterogeneity raises a multitude of questions of broad significance. How does this heterogeneity arise, which processes are affected by this, and what is the overall effect on the success of the population? Our aim is to shed light on the contribution of population heterogeneity to the strategies bacteria use to survive, prosper, and evolve.

Altering antigenicity is a common bacterial virulence strategy, and this often is a heterogenous trait. We are examining this in Enterobacteriaceae. We have identified Salmonella genes that alter this pathogen’s antigenicity, specifically on carbohydrate surface molecules (the LPS), and have shown that expression phase varies, resulting in population heterogeneity. Our work has elucidated mechanisms of bacterial epigenetic regulation by DNA methylation, which may be applied to synthetic biology and is giving insight into phenotypes of natural pathogen populations. We are studying the proteins that mediate these cell surface changes, and are addressing how these modifications and the heterogeneity impact the interactions of the pathogen with the environment (host or otherwise). This work also is carried out in context of several collaborations. This line of research is in part basic science, and in part aims to provide knowledge that may inform vaccine development strategies and diagnostics, provide insights into pathogen evolution, and may lead to the identification of novel anti-virulence strategies.

Bacterial infections remain a significant health concern, and are caused by populations of bacteria that have to survive and grow in competitive environments and complex environments. In an interdisciplinary collaboration we are examining how individual cells and toxins affect cell-cell interactions and community development. Our experimental approaches include those facilitated by equipment and expertise from the Imaging and Cytometry labs in the University’s Technology Facility.

The lab’s microbiology knowledge and expertise supports a range of research activities across the University towards developing novel diagnostic approaches, identifying antimicrobial targets and colleagues aiming to apply their specialized knowledge to support development of novel antimicrobial therapies. We work with the York Plasma Institute integrates our microbial knowledge and approaches with the knowledge approaches and expertise on analysis and control of biomedical low temperature plasmas in the YPI. This plasma is the “4th state of matter” and consists of ionized gas, which can deliver a host of toxic compounds to a sample, and has bactericidal activity. However, much remains to be understood from both the plasma physics point of view (remit of YPI) and the biological effects. Our combined efforts aim to support further translation of basic science insights into novel antimicrobial therapies suitable for clinical applications.

Teaching

Lectures

I give lectures for Hull York Medical Students and for students in the Biosciences Programmes.  I adhere to research led teaching, focusing on introducing concepts both classical and new, disseminating factual knowledge, and providing insight and background to research papers/experiments.  The lectures provide overall support for learning.  I teach microbiology with topics ranging from basic science to pathogenesis, mainly relating to bacteria.  Lectures are tailored to the group I am speaking to and context I am teaching in.

Tutorials

Small group teaching, as in tutorials (Biosciences) or SSIPs (HYMS), allow students to explore scientific topics of their own choosing -within the tutorial remit of “bacteria”, where topics may still range from bacterial pathogenesis to industrial applications, to antimicrobial resistance. Students’ participation is key and their interests help shape the direction of the sessions.  We use the sessions as a platform to discuss science and scientific processes, practice critical thinking, study cutting edge research and novel findings, and explore how science works. Broader issues like research ethics, what science graduates can offer society or how much research costs have also been explored.

Projects

Research projects for intercalating, undergraduate and Masters students are aligned with the research activities that are ongoing in the lab at the time.  I offer primarily lab-based projects, frequently molecular microbiology oriented, but image analysis or other computational projects may be available.  Please see the research tab for an overview of current research activities. 

Publications

Visit Dr van der Woude's profile on the York Research Database to see a full list of publications, browse activities and projects, explore connections, collaborations, related work and more.

Postgraduate research supervision

Dr Van der Woude welcomes supervision enquiries from prospective students interested in undertaking postgraduate research.