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A family study of coeliac disease
Insights
Familial coeliac disease (CD) frequency is high, but studies show varied diagnostic criteria and no clear hereditary pattern. Environmental factors and genetics likely play complex roles in CD susceptibility.
Area of Science:
- Gastroenterology
- Genetics
- Immunology
Background:
- Previous studies indicate a high familial occurrence of coeliac disease (CD).
- Diagnostic criteria for CD varied across studies, impacting observed familial frequencies.
- Identical twin studies have shown discordance for CD, suggesting complex inheritance patterns.
Purpose of the Study:
- To review and synthesize findings on the familial frequency and inheritance patterns of coeliac disease.
- To highlight the heterogeneity in diagnostic approaches used in coeliac disease research.
- To discuss the implications of genetic and environmental factors in coeliac disease aetiology.
Main Methods:
- Review of existing literature on familial coeliac disease.
- Analysis of diagnostic criteria employed in cited studies.
- Comparison of findings regarding hereditary patterns and twin studies.
Main Results:
- High familial frequency of coeliac disease reported across multiple studies.
- Inconsistent diagnostic criteria (clinical data, gluten-free diet response, biopsy) complicate direct comparisons.
- No definitive hereditary pattern identified; theories include multifactorial inheritance and environmental influences.
Conclusions:
- Coeliac disease likely results from a complex interplay of genetic predisposition and environmental triggers.
- Further research is needed to elucidate the specific genetic and environmental factors contributing to coeliac disease.
- Standardized diagnostic criteria are essential for future coeliac disease research.
Abstract:
Studies by Thompson, 1 Carter et al, 2 MacDonald et al. and McCrae 4 have all shown a high familial frequency of coeliac disease (CD). The diagnostic criteria differed in each study; in Thompson's patients the diagnosis was based on clinical or historical data alone; in Carter's study response to a gluten-free diet was required, while in MacDonald's and McCrae's studies the diagnostic criteria included the demonstration of the lesion of CD by small bowel biopsy. In MacDonald's study some asymptomatic cases were discovered and a few of these had normal fat balance results. No hereditary pattern emerged from these studies though MacDonald postulated a dominant gene with variable penetrance while McCrae suggested that susceptibility to CD is inhereited multifactorially and that enviromental factors other than dietary gluten are of aetiological importance. Hoffman et al. 5, on the other hand, have described discordance for CD in identical twins.