Dr Helle Jørgensen
- Associate Professor
- Stem Cell and Developmental Biology
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About
Atherosclerosis causes death by heart attack and stroke, and has vast socio-economic consequences. Targeting arterial cells to stabilise disease represents unexplored territory, that would complement current risk factor-reducing approaches. In particular, vascular smooth muscle cells (VSMCs) are enriched for coronary artery disease GWAS signals and generate the majority of cells in atherosclerotic lesions. The Jorgensen Team aims to identify mechanisms regulating VSMCs that can be leveraged for disease treatment and prevention.
Helle Jorgensen is an Associate Professor at the University of Cambridge. Her group studies how vascular smooth muscle cell (VSMC) plasticity and heterogeneity is regulated in vascular health and disease. Her team has demonstrated that a small number of pre-existing VSMC undergo extensive proliferative expansion to generate a large number of cell in atherosclerotic lesions and that similar clonal expansion is a hallmark of other vascular disease models. Using single cell transcriptome profiling, the group has revealed substantial VSMC heterogeneity both in lesions and in healthy arteries. These findings have implication for the understanding of VSMC behaviour and how selective targeting of disease-associated VSMC could be translated to the clinic.
Helle was awarded a PhD in molecular biology from Aarhus University in 2000 (Prof Brian Clarke). During her postdoctoral training she studied DNA-methylation-binding factors under the mentorship of Prof Sir Adrian Bird (University of Edinburgh) and investigated how transcription factors and epigenetic mechanisms control embryonic stem cell maintenance and cell fate choices (Prof Dame Amanda G Fisher, London Institute of Medical Research).
ORCID: 0000-0002-7909-2977
Research
The focus of the Jorgensen team is the regulation of cell plasticity in the cardiovascular system and the implications for vascular disease. In particular, we study vascular smooth muscle cells (VSMC) and how they contribute to the development of atherosclerosis, the disease underlying heart attack and stroke.
VSMCs exist in a contractile, quiescent state in healthy arteries, but can downregulate this phenotype in response to injury and inflammation. The resulting de-differentiated state is characterised by widespread changes in gene expression leading to perturbed extracellular matrix remodelling, proliferation and migration.
We study how these gene expression programs are regulated and impact on phenotypic plasticity in development, tissue homeostasis and disease models. The team has demonstrated that a small number of pre-existing VSMC undergo extensive proliferative expansion to generate a large number of cell in atherosclerotic lesions and that similar clonal expansion is a hallmark of other vascular disease models. Using single cell transcriptome profiling, the group has revealed substantial VSMC heterogeneity both in lesions and in healthy arteries. These findings have implication for the understanding of VSMC behaviour and how selective targeting of disease-associated VSMC could be translated to the clinic.
The Jorgensen Team welcomes enquiries from motivated and talented prospective team members :)
We are hiring: Postdoc in single cell RNA-Sequencing and Functional Genomics in Cardiovascular Biology. Information and link to apply is available here https://www.jobs.cam.ac.uk/job/48385/
Teaching and supervision
Collaborators
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Professor Benjamin Simons
- Herchel Smith Chair in Physics
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Professor Chris Smith
- Professor
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Professor Llewelyn Roderick
- Affiliated Lecturer
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Professor Martin Bennett
- BHF Professor of Cardiovascular Sciences
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Professor Sanjay Sinha
- Professor in Cardiovascular Regenerative Medicine
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Professor Ziad Mallat
- BHF Professor of Cardiovascular Medicine