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This project will provide in-depth training in genetic epidemiology, childhood mental health, cohort studies and cleft. The student will have the opportunity to develop into one of few experts globally with understanding across these areas. In this PhD you will investigate the genetic and non-genetic causes of neurodevelopmental and mental health outcomes in children born with one of the most common birth defects, cleft of the lip and/or palate. You will be based at the MRC Integrative Epidemiology Unit (IEU) at the University of Bristol; a world-class research centre in the field of integrative epidemiology who has pioneered Mendelian randomisation.
Cleft of the lip and/or palate is a common birth defect and occurs at a rate of one in 650 live births in the UK. Being born with cleft places a significant burden on children, their families and the health system as they require surgery (multiple times depending on cleft type), and other interventions to improve appearance, speech, hearing and dentition. They are also at increased risk of mental health and neurodevelopmental problems (Berman et al 2022). These problems may reflect the psychological, developmental and social impacts of clefting and its treatment. Alternatively, they may reflect genetic factors either as pleiotropic outcomes of genetic susceptibility to clefting or as independently inherited genetic risk. The UK-based Cleft Collective comprises the world’s largest cohort study of children affected by cleft and their families (www.bristol.ac.uk/dental/cleft-collective/) with longitudinal information on mental health, parental, prenatal and early life factors as well as genetic data.
The aetiology of both cleft and of mental health outcomes is complex, with common risk alleles (Cleynen et al 2021, Howe et al 2018) of individually small effects as well as rare genetic mutations of large effect and environmental factors playing roles. One group of rare mutations of large effect are Copy Number Variants (CNVs), referring to deletion or duplication of a part of the genome leading to differences between individuals in the number of copies of genes within the affected region. A number of CNVs are known to increase risk of neurodevelopmental disorders (ND-CNVs), such as ADHD and autism, as well as mental health disorders but the presence and the impact of ND-CNVs have not been studied in cleft (Chawner et al 2019).
The PhD project will provide the first detailed description of neurodevelopmental and mental health outcomes in children with cleft and examine the contributions of genetic and environmental factors. We will use two unique genetically informative clinical cohorts of children; the University of Bristol Cleft Collective and the Cardiff University longitudinal ExperiencCes of people witH cOpy number variants (ECHO) study. Control samples will consist of the Avon Longitudinal Study of Parents and Children (ALPSAC) and the Millennium cohort which are deeply-phenotyped cohorts of typically developing children.
The aims of the study are:
A list of all the projects and how to apply is available on the DTP’s website at gw4biomed.ac.uk. You may apply for up to 2 projects and submit one application per candidate only.
Please complete an application to the GW4 BioMed2 MRC DTP for an ‘offer of funding’. If successful, you will also need to make an application for an 'offer to study' to your chosen institution.
Please complete the online application form linked from the DTP’s website by 5.00pm on Monday, 4th November 2024. If you are shortlisted for interview, you will be notified from Friday, 20th December 2024. Interviews will be held virtually on 23rd and 24th January 2025. Studentships will start on 1st October 2025.
For application enquiries, please contact [Email Address Removed].
For enquiries related to this project, please contact Evie Stergiakouli ([Email Address Removed]).
This studentship is funded through GW4BioMed2 MRC Doctoral Training Partnership. It consists of UK tuition fees, as well as a Doctoral Stipend matching UK Research Council National Minimum (£19, 237 p.a. for 2024/25, updated each year).
Additional research training and support funding of up to £5,000 per annum is also available.
If you’re successful in being offered a studentship the GW4 partners have all agreed to cover the difference in cost between home and international tuition fees. This means that international candidates will not be expected to cover this cost and will be fully funded in the same way as home students.
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