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The University of Sheffield Faculty of Medicine, Dentistry & Health Department of Cardiovascular Science Determining the biological and prognostic significance in pulmonary arterial hypertension of identified SNPs in osteoprotegerin. Supervisor: Dr Allan Lawrie & Dr Martina Daly Project: Pulmonary Arterial Hypertension (PAH) is a rare disease defined by cardiac catheterisation as a mean pulmonary artery pressure of at least 25 mmHg. Patients with PAH have significant morbidity and, if untreated, a median survival of 2.8 years. Pathologically, PAH is characterised by progressive narrowing of small resistance pulmonary arteries and arterioles due to a process of vascular cell proliferation and inflammatory cell infiltration. We have previously identified that the protein osteoprotegerin (OPG) in upregulated in pulmonary vascular lesions and serum from patients with PAH. We have recently demonstrated that OPG is required for the development of PAH in experimental models, and furthermore, that treatment with an anti-OPG antibody reverses disease in these models. Preliminary data has identified 3 rare haplotypes of the gene encoding OPG in patient samples obtained from the Sheffield Pulmonary Hypertension Biobank and shown that the rare allele of a non-synonymous single nucleotide polymorphism (SNP) in Exon 1 of the gene is more common in Idiopathic PAH, associated with higher serum levels of OPG and predicts a poor prognosis. The aim of this project is to study the genotype to phenotype relationship of these SNPs using a combination of site-directed mutagenesis and expression studies. Entry Requirements: Candidates must have a first or upper second class honors degree or significant research experience. Enquiries: Interested candidates should ([email protected]). How to apply: in the first instance contact Allan Lawrie Please complete a University Postgraduate Research Application form and attach at least two references to your application. To complete the application form please visit: www.shef.ac.uk/postgraduate/research/apply. Please clearly state the prospective main supervisor in the respective box and select ‘Medicine’ as the department. Website: http://www.shef.ac.uk/cardiovascularscience Closing date: To be agreed