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The Avon Longitudinal Study of Parents and Children (ALSPAC): a resource for genetic epidemiology
1Institute of Child Health, University College London, London, UK. M.Pembrey@bristol.ac.uk
Insights
The Avon Longitudinal Study of Parents and Children (ALSPAC) is a large cohort study collecting genetic and environmental data. This research explores genetic and environmental factors influencing child development and common diseases.
Area of Science:
- Epidemiology
- Genetics
- Developmental Biology
Background:
- The Avon Longitudinal Study of Parents and Children (ALSPAC) cohort comprises approximately 14,000 children and their parents, with extensive phenotypic and environmental data collected since pregnancy.
- A substantial DNA bank and planned cell lines support genetic analyses within this multigenerational, unselected population.
Purpose of the Study:
- To investigate the genetic and environmental determinants of adverse developmental responses and common diseases.
- To utilize a unique, disease-unselected cohort for exploring gene-environment interactions in health and development.
- To establish novel methods for genetic epidemiology, including detecting Mendelian transmission distortion and heterosis.
Main Methods:
- Collection of detailed phenotypic and environmental data from pregnancy onwards.
- Establishment of a DNA bank for genetic analysis of mothers and children.
- Planned creation of cell lines for both children and parents.
- Application of phenome scans for analyzing genotype associations with thousands of outcome variables.
Main Results:
- The ALSPAC cohort provides a unique resource for exploring genetic and environmental influences on health and development.
- The study design allows for the detection of genetic transmission biases and the investigation of heterosis.
- Phenome scans offer a screening approach to identify impactful genetic variations on human health.
Conclusions:
- ALSPAC is a powerful multigenerational resource for understanding the etiology of common diseases and developmental responses.
- The study facilitates advanced genetic epidemiology by enabling tests for Mendelian distortion and heterosis.
- Phenome scans can serve as a valuable tool for discovering genetic associations with health outcomes.
Abstract:
The Avon Longitudinal Study of Parents and Children (ALSPAC) has collected detailed phenotypic and environmental information from pregnancy onwards on approximately 14 000 babies born in 1991-1992. A DNA bank on over 10 000 mothers and children has been established with generic consent for (undisclosed) genetic analysis, and cell lines on both children and parents are planned. As a multigenerational population cohort unselected by disease, trait or exposure, ALSPAC is uniquely placed to explore the genetic and environmental determinants of adverse developmental responses and common disease. Added value for genetic epidemiology generally is the ability to detect distortion of the expected Mendelian 50:50 transmission of alleles to study subjects (e.g. due to differential loss of embryos of one genotype) or to test for heterosis, i.e. whether heterozygotes have a greater or lesser effect than either homozygote. Finally, phenome scans (a fixed format analysis of the associations between a genotype of interest and thousands of outcome variables from the cohort database) could be used as a screening tool to test whether certain classes of genetic variation have more impact than others on human health and development.
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