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Our research has established that Trimethylaminuria (TMAU) — a rare and distressing disorder where affected individuals excrete large amounts of odorous trimethylamine (TMA) in their breath, sweat and urine — is a genetic disorder, and is not, as previously thought, due to poor hygiene. This has transformed understanding in the medical community and the wider public of why some people have an extremely unpleasant `fishy' body odour, and has been crucial to helping individuals with TMAU who often suffer social isolation, rejection, depression and higher than normal suicide rates. The findings have led to genetic diagnosis and genetic counselling for TMAU in the UK, Europe, USA and Canada and the publication of guidelines for the diagnosis and treatment of the disorder.
As a result of research from Oxford's Professor Andrew Wilkie, accurate genetic diagnostic tests are now available for over 23% of all craniosynostosis cases nationally and internationally, leading to improved family planning and clinical management of this common condition worldwide. The premature fusion of cranial sutures, known as craniosynostosis, is a common developmental abnormality that occurs in 1 in 2,500 births. Over the past 20 years, the University of Oxford's Clinical Genetics Lab, led by Professor Wilkie in collaboration with the Oxford Craniofacial Unit, has identified more than half of the known genetic mutations that cause craniosynostosis and other malformations of the skull.
Diagnostic tests have been successfully developed for identification of the cause of erythrocytosis, particularly in patients with unexplained forms of this rare disease. A diagnostic service with worldwide reach was developed for the genetic characterisation of patients that carry mutations identified by the Queens's group. It deals with approximately 100 samples per year referred for investigation for this rare disease from the UK, Europe and further afield. Proper diagnosis helps in management of patients with erythrocytosis where the problem is not mutation in one of the familiar causative genes. A pan-European web-based database has been established to collect information on long-term outcomes to inform patient management.
Our research has had impact on the activities of practitioners and their services, health and welfare of patients, on society and on public policy. New diagnostic tests for genetic deafness have been introduced, and healthcare guidelines and professional standards adopted through our investigation of the aetiology of childhood-onset hearing loss. Disease prevention has been achieved by our research on antibiotic-associated deafness, public awareness of risk to health and hearing has been raised, and we have increased public engagement through debate on scientific and social issues. We have also influenced public policy on ethics of genetic testing for deafness with our research resulting in improved quality, accessibility and acceptability of genetic services among many hard-to-reach groups (deafblind, culturally Deaf, and the Bangladeshi population of East London).
Research from the University of Oxford's Clinical Genetics Laboratory initiated the introduction of an upper age limit of 40 years for sperm donors in the UK and internationally and led to increased public awareness of the effect of paternal age in the transmission of inherited disease. Oxford researchers, led by Professor Andrew Wilkie, were the first to describe the exclusively paternal transmission of de novo mutations, in a rare craniofacial disorder called Apert Syndrome; they also showed that the accumulation of such mutations leads to a disproportionate risk of disease transmission with age. By showing that the frequency of mutations increases with paternal age, this research contributed to important changes in clinical practice relating to sperm donation. This has also had a significant cultural impact, as the research and its clinical outcomes have challenged public perceptions of paternal age.
Individuals with Xeroderma pigmentosum (XP) are extremely susceptible to sunlight-induced skin cancers and, in some cases, develop neurological problems. Alan Lehmann has developed a cellular diagnostic test for this disorder. This test is now conducted as an integral part of a multi-disciplinary XP specialist clinic in London, which was established as a direct result of Alan Lehmann's research in Sussex and which has led to the improved diagnosis and management of the disorder and an improved quality of life for affected individuals.
Research by Professor David Brook on inherited disorders has made a major contribution to the human genetics field. The work involved gene identification and mutation detection for genotype/phenotype correlation analysis in patients, which has led to the development of diagnostic tests for inherited conditions including myotonic dystrophy type 1 (DM1), Holt-Oram Syndrome (HOS), and campomelic dysplasia (CD). The tests have benefitted patients in the UK and throughout the rest of the world and in many cases they have been used as the definitive diagnostic measure. The assays developed have also been used in affected families for prenatal diagnosis to enable informed reproductive decisions.
Research at UCL into the genetics of neuronal ceroid lipofuscinoses (NCL) — also known as Batten Disease - has had a global impact on the diagnosis and understanding of this group of diseases. The identification of genes and mutations has led to new diagnostic tests, which inform clinical management in terms of expected disease course and choice of the most effective drugs; prenatal and pre-implantation diagnoses for prevention are also possible. The group has established a new classification of diseases according to gene-based nomenclature. Information about all genes that underlie NCL has been collated in the NCL Mutation Database, which is freely available on the NCL Resource website. The group has also engaged closely with professionals and affected families to maximise the reach and understanding of research.
Basic molecular genetic research undertaken over the last 20 years by UCL Cardiovascular Genetics has had a significant impact on the identification and treatment of patients with familial hypercholesterolaemia (FH). We have developed DNA testing methods in the three genes currently known to cause FH and have established DNA diagnostic protocols which are now in wide use throughout the UK. As a direct consequence of our work, we estimate that up to 3,000 FH patients in the UK have had their diagnosis of FH confirmed by a DNA test. Our work led to the National Institute of Health and Clinical Excellence (NICE) in 2008 strongly recommending DNA and cascade testing and early treatment with high intensity statins, and furthermore, the inclusion of FH checks in the NHS's Vascular Checks programme.
Research at the UCL School of Pharmacy has positively influenced healthcare in startle disease/hyperekplexia, a rare disease that affects humans and several animal species, including dogs, horses and cattle. The identification and functional characterisation of mutations in genes involved in human startle disease by researchers at the School has improved genetic diagnostics and patient care. Our research on startle disease in cattle and dogs has also led to new non- invasive diagnostic tests that have alleviated animal suffering and reduced negative economic impacts on farmers. Overall, our findings have been translated into tangible benefits for the human and animal populations affected by this disease and have changed the way in which the disease is diagnosed and treated. We have also significantly increased the awareness of this rare disorder by communicating with academics, healthcare and veterinary professionals, and the general public.