Proposal summaries
B303 - Maternal over-nutrition and offspring fat mass and vascular function - 05/01/2006
The fetal over-nutrition hypothesis suggests that mothers who are overweight, gain weight rapidly during pregnancy, have high energy diets and those with on averagehigher glucose, insulin and lipid levels (even in the absence of diagnosed gestational diabetes or lipid abnormalities) programme their offspring to become overweight/obese and have vascular and metabolic problems later in life.If this hypothesis is correct then it would have major public health consequences since overweight/obese mothers would programme their offspring to be overweight/obese and have poor vascular and metabolic function; for their female offspring this would mean that they similarly went into their pregnancies overweight and with relatively high glucose and lipid levels, and would thus do the same with their offspring.Consequently, it is feared that if this hypothesis is true then interventions to reduce the obesity epidemic will fail to have any population impact for many generations.Despite this concern there is little high quality research that has attempted to test this hypothesis. Work in animal models demonstrate proof of principle,but may not be generalisable to humans. The small number of studies undertaken in humans have failed to use robust methods for demonstrating a specific intrauterine effect, as opposed to shared familial (environmental or genetic) effects, and have failed to adequately control for potential confounding factors.
B301 - Data for Local Public Health Practitioners - 04/01/2006
(No outline received).
B300 - Growth Related effects in ALSPAC on Cardiac Endpoints GRACE - 04/01/2006
Obesity in children is on the increase, and is associated with heart enlargement. This could be due to increases in the load on the heart, although abnormal nervous control of the heart or altered arterial function could also contribute. Low birthweight children, who exhibit accelerated growth through childhood, may be particularly affected. We will use non-invasive techniques to examine heart and arterial structure and function in 2500 fifteen year olds who have been part of a detailed study of growth since birth. This will help us understand why obesity results in heart disease, and why adolescents who have grown rapidly in childhood are at particular risk.
B326 - ESRC Scoping project -Depositing of defined ALSPAC data sets with the UK Survey Archive - 01/01/2006
This proposal has two functions: (1) to prepare 6 data sets for deposit in the Archive with appropriate documentation
(Phase 1), (2) to document other data sets and calculate the relevant costing for future data deposition (Phase 2). It is
hoped that subsequent use by the social science community will prove the worth of the first 6 data sets in regard to both
analyses across cohorts, and also over time within the ALSPAC population.
B278 - Identification of genetic roots of coronary artery disease by combining stepwise genome wide association studies with trascriptomic and functional genomic investigation of relevant genetic variants - 01/12/2005
The main scientific and technological objectives of this highly focused RTD project are:
* to carry out well-integrated genome-wide and functional genomics research in order:
o to identify genetic risk markers for CAD
o to link these with transcriptome data and cellular function in atherosclerosis
o to discover new candidates and systems for drug development
o to exploit Intellectual Property Rights (IPR) in partnership with SMEs and the pharmaceutical industry
o to develop integrated novel information systems
* to establish a world-leading European consortium on the basis of genuine and equal partnership between leading clinical centres, academic groups, cell biologists, bioinformaticians and biostatisticians to provide further knowledge into the genetic basis of CAD for the benefit of members of the European Community.
B276 - The use of homeopathic products in childhood - 01/12/2005
(No outline received).
B356 - Schools Project Extension - 01/11/2005
The aim of the ALSPAC study is to identify the biological, physical, genetic, psychological and pedagogical factors that influence health and development. The Department's contributions are to ensure that the study also covers the following key social and educational research themes:
1. the engagement of young people with learning
2. 14-19 system reform and the learning pathways and experience of 15-17 year olds
3. sub-group differences in achievement, social engagement and attitudes to learning and employment
4. wider skills and attributes: academic, psychological, behavioural and personal development
5. the relative influences of families, schools, peers and cultural values on decisions, behaviour and engagement at 16/17
B275 - Fish consumption mercury omega-3 fatty acids and neurocognitive outcomes - 01/11/2005
The relative risks of potentially toxic compounds found in seafood compared to the potentially beneficial nutrients rich in seafood is a significant public health issue and has been the subject of an US Federal Advisory in 2004, which limits seafood in pregnancy. A major impetus for conducting this research is the finding from the ALSPAC cohort that compliance with this advisory appears to be associated with greater risks of the specific harms (e.g. suboptimal verbal development) it was designed to prevent. This prior analysis, conducted as a collaboration between LMBB/NIAAA/ NIH and ALSPAC, compared dietary intakes during pregnancy estimated by food frequency questionnaire data, to childhood developmental outcome data. The findings of lower than expected verbal IQ and other suboptimal outcomes such as poor fine motor development and adverse socialization among the cohort, do not appear to be attributable to confounding variables. This increased risk of suboptimal developmental outcomes may be due to deficiencies in nutrients uniquely rich in seafood, potentially the long chain omega-3 fatty acids eicosapentaenoic acid (EPA) and docosahexaenoic acids (DHA). Several lines of evidence indicate that insufficient dietary intakes of EPA and DHA increase the risk of neurodevelopmental impairments. Among these are that DHA is selectively concentrated into neuronal tissues and the proliferation of neuronal dendrites and synapses is substantially enhanced by DHA. Since the main source of DHA-EPA for humans comes from the dietary intake of fish & seafood (or fish oil dietary supplements) the evaluation of food frequency data from the ALSPAC cohort indicates that pregnant women need a sufficient intake of DHA-EPA in order to prevent increasing risk of suboptimal outcomes among their offspring. Another nutrient uniquely rich in seafood, selenium has a protective effect against mercury in utero in animal experiments. As selenium is fairly high in most marine fish/seafood, there could be a natural offsetting of the dietary ingestion of methylmercury present in marine fish/seafood versus the selenium present in the marine fish/seafood. Selenium is thought to bind with and detoxify methyl-mercury and a greater ratio of methyl-mercury to selenium is thought to indicate that the primary protective mechanism against methyl-mercury toxicity has been overwhelmed. However, the impact of this relationship in humans needs to be evaluated as previous research on mercury or methylmercury may be inherently flawed as selenium was not simultaneously considered with the mercury.
B273 - An ESRC Centre An examination of the impact of family socio-economic status on outcomes in late childhood and adolescence - 01/11/2005
To chart the relationship of these outcomes with socio-economic status of the family of origin of a large population
based sample of young people currently living in the UK.
To understand the complementarities between different aspects of children's and adolescent's lives at one point of time
and across time, examining lives from birth to adolescence.
To study the pathways by which socio-economic status of parents affects outcomes for their children. These pathways
include the role of peer groups, friendships and neighbourhoods; schools; psychological motivations; parental mental
health; family (mal)functioning and parental behaviours early in children's lives.
To compare the development of current adolescents in the UK with their US counterparts and those in the UK of earlier
generations.
To undertake methodological innovation in the analysis of large scale survey data, including the estimation of nonnested
hierarchial data; the analysis of the impact of missing data and the use of imputation techniques; and the
exploration of the use of biomedical, including genetic, information as instruments for observed outcomes in early/middle
childhood.
To disseminate our research to the academic community in a wide range of disciplines; to inform policy makers and aid
the development of information based policy in the fields of child and adolescent development, family, educational and
neighbourhood policy; and to achieve a step change in the usage of the unique Avon Longitudinal Study of Parents and
Children (ALSPAC) data resource within the social science community in the UK and overseas.
B268 - The environmental determinants of refractive error - 01/11/2005
To test already postulated relationships between the environmental exposures and refractive error development in the ALSPAC cohort, using existing data (non-cycloplegic autorefraction
To obtain axial length measurements on the ALSPAC cohort of childrenat the age of 15 and use these data to confirm/modify the results from phase
To carry out cross cohort comparisons with another cohort study that is dedicated to the development of myopia (the Singapore Cohort study Of Risk factors for MyopiA- SCORM) and has comparable, wide-ranging data.
B267 - Wellcome Advanced Training Fellowship - 01/11/2005
(No outline received).
B271 - ALSPAC and cannabis use and mental health - 01/10/2005
(No outline received).
B269 - Recurrence of postpartum depression - 01/10/2005
(No outline received).
B262 - Alcohol consumption and the outcomes of pregnancy - 01/10/2005
(No outline received).
B221 - The prevalence associations and impact of developmental co-ordination disorder within ALSPAC - 01/10/2005
Developmental Coordination Disorder (DCD) is an under recognised cause of major disability in childhood. Due to a lack of robust epidemiological evidence there is a lack of awareness of how DCD affects children and limited evidence to support existing intervention strategies.
The aim of this study is to enhance the evidence base regarding the potential impact of DCD on the lives of children in order to inform recommendations for service provision, leading to the development of targeted multidisciplinary interventions to reduce physical, psychological and social disability. The proposed "Complex Intervention" will be based on a systematic review of the literature, a quantitative analysis of a large existing dataset, and a qualitative investigation of the experience of a group of adolescents with DCD and their parents.
B446 - Systematic genotyping in central appetite-regulatory pathways for association with childhood obesity risk - 16/09/2005
No outline received
B264 - Pathways to cannabis use and from cannabis use to harm amongst young people - 01/09/2005
Specific aims of this project are to:
1. Fully exploit data already collected in ALSPAC to investigate trajectories to use of cannabis and other drugs in late adolescence and early adulthood and adverse psychological, educational and social outcomes associated with these pathways.
2. Collect new data on ALSPAC children in late adolescence and early adulthood so that the resource has data on the whole of childhood - from before birth to the onset of adulthood allowing investigation of effects of exposures both cumulatively and during critical time periods, such as pregnancy, infancy, puberty and adolescence, on outcomes measured in late adolescence and around the onset of adulthood.
3. Obtain consent for and establish mechanisms of linkage between individual ALSPAC study participants and routine sources of data on educational, social and health outcomes that may be influenced by exposure to cannabis and other drugs.
The project will realise these aims through meeting the following objectives:
* Objective 1:To obtain detailed and objective measurement of frequency, quantity, route of administration, form of drug used and dependence on cannabis and other drugs through a clinic based assessment at age 17 (including collection of biological samples) and a postal questionnaire at age 19
* Objective 2: To measure psychotic like symptoms in a clinic based assessment at age 17 and a postal questionnaire at age 19.
* Objective 3: To measure involvement in antisocial and other risky behaviour, sibling drug use, social position and labour market participation through a postal questionnaire at age 19.
* Objective 4: To develop the methodology necessary to allow individual linkage to routine health and social outcome data and to extend linkage already established (with parental consent) to educational outcome data to these other data sources after obtaining individual consent at an age 17 clinic.
* Objective 5: To examine direct associations between currently established candidate polymorphisms and candidate polymorphisms that emerge during the lifetime of the project on trajectories and level of cannabis use, and to use such polymorphisms as unconfounded measures of cannabis intake to look at associations between cannabis use and related harm.
* Objective 6: To examine possible gene-environment interactions involving such genotypes in relation to the outcomes considered in this project.
* Objective 7: To use ALSPAC data already collected along with data collected as described above to clarify causal pathways to onset and progression of cannabis use, to use of other drugs and to the adverse outcomes associated with such use, attributable risks of key causal exposures and most promising targets for effective intervention.
* Objective 8: To establish a resource that will allow consideration of these questions in relation to adverse health and social outcomes apparent beyond the lifetime of the project.
B261 - Diet in relation to increasing body fatness in childhood - 01/09/2005
Childhood obesity is a major problem in westernised countries. It strongly tracks with adult obesity, a major modifiable risk factor for cancer. Higher levels of body fatness are associated with Westernised life styles of which diet is a potentially modifiable component. Studies that have concentrated on nutrient-obesity associations have often failed to show consistent relationships. The study of dietary patterns over time may be more informative, as foods or nutrients are not eaten in isolation.
This project will use data collected by the Avon Longitudinal Study of Parents and Children (ALSPAC), a large prospective cohort study. Dietary information has been collected on several occasions throughout childhood using food frequency questionnaires (FFQ) and using 3-day diet diaries at 10 and 13 years of age. Dietary patterns assessed by principal components analysis and cluster analysis will be considered as the primary exposures. Total body fatness and lean tissue mass have been assessed at 9, 11, 13 and 15 years of age by Dual Energy X-Ray Absorptiometry (DXA). We will investigate the relationships between dietary patterns throughout childhood and the fatness of the children, with particular focus on the children who increase in fatness between 9 and 15 years.
B259 - Reducing emotional distress in adolescence the role of the school in influencing vulnerability and resilience - 01/09/2005
The proposed study is part of a wider application to the MRC for a postdoctoral Special Research Training Fellowship in Health Services and Health of the Public Research. The overall theme of the application is the causes of emotional distress in early to mid adolescence and the support needs of those who experience this, with a particular focus on the school context, in terms of risk factors and potential avenues of support. The aim of this particular study is to assess incidence and school-related risk factors for deliberate self-harm in 14-15 year olds in ALSPAC. The young people in the sample have already been asked during their clinic interviews at age 11 about episodes of self-harm and suicidal thoughts (frequency, timing and nature of episodes). The children were asked the following questions: (a) "Have you thought of killing yourself?" (b) "Have you ever hurt yourself on purpose?" (c) "Have you ever made plans to kill yourself?" (d) "Have you actually tried to kill yourself?". I propose to build on this data, by including several questions in the questionnaires to be sent out to the ALSPAC teenagers at age 14-15 years.
B257 - Socioeconomic patterning of cognitive function in children - 01/09/2005
Background. Cognitive function and intelligence quotient (IQ) have been related with adult mortality in some but not all studies. IQ was not related to coronary heart disease or stroke after the age of 651 and childhood IQ was not related to mortality in women2. Adjustment for socioeconomic circumstances partly explains this association3. Furthermore, childhood cognitive ability could determine school performance and thus, influence later socioeconomic position. Research in this area is limited and ASLPAC offers a unique opportunity to investigate whether cognitive function is already socially patterned at a young age.
Objective. The objective of this project is to investigate whether cognitive function in childhood is socially distributed, using different aspects of cognitive function and different measures of socioeconomic position.
Main variables for this project. We will need variables measuring cognitive function (e.g. McArthur Communicative Development Inventory at 20 months, Pre-School Language Scales (PLS-3), McCarthy Scales of Children's Abilities at 36 months, etc.), family background details, and the primary carer's verbal functioning (Mill Hill Vocabulary Scale), are and individual socioeconomic position indicators, socio demographic characteristics and school characteristics.
Statistical analysis. We will assess the social patterning of cognitive function in the children, with particular attention to using different indicators of life course socioeconomic position to describe this distribution. We will conduct multiple regression analysis. Sensitivity analyses will be carried out to explore the degree to which misclassification of both exposures and confounders could influence the observed effect estimates.
References.
1. Hart CL, Taylor MD, Smith GD, et al. Childhood IQ and cardiovascular disease in adulthood: prospective observational study linking the Scottish Mental Survey 1932 and the Midspan studies. Soc Sci Med 2004;59:2131-8.
2. Kuh D, Richards M, Hardy R, Butterworth S, Wadsworth ME. Childhood cognitive ability and deaths up until middle age: a post-war birth cohort study. Int J Epidemiol 2004;33:408-13.
3. Huisman M, Kunst AE, Mackenbach JP. Intelligence and socioeconomic inequalities in health. Lancet 2005;366:807-8.