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Imaging Features of Systemic Sclerosis-Associated Interstitial Lung Disease
Published on: June 16, 2020
Heredity in sarcoidosis: a registry-based twin study
A Sverrild1, V Backer, K O Kyvik
1Department of Respiratory Medicine, Bispebjerg Hospital, DK-2400 Copenhagen NV, Denmark. asgersverrild@stud.ku.dk
Thorax
|June 7, 2008
Summary
Genetic factors significantly influence sarcoidosis susceptibility. This study found higher concordance in identical twins, indicating a strong genetic component for this inflammatory disease.
Area of Science:
- Genetics
- Immunology
- Epidemiology
Background:
- Sarcoidosis is a complex, multiorgan granulomatous inflammatory disease with unknown origins.
- Observed familial clustering and ethnic variations suggest a genetic predisposition.
- This study aimed to quantify the genetic contribution to sarcoidosis susceptibility.
Purpose of the Study:
- To estimate the heritability of sarcoidosis.
- To assess the role of genetic factors in sarcoidosis susceptibility using twin data.
Main Methods:
- Utilized Danish and Finnish national twin cohorts (61,662 pairs).
- Linked twin data to national registries for sarcoidosis diagnoses (ICD-8/10).
- Calculated probandwise concordance rates and estimated heritability using a multifactorial liability model.
Main Results:
- Identified 210 twin pairs with sarcoidosis.
- Probandwise concordance was significantly higher in monozygotic (0.148) than dizygotic twins (0.012).
- Estimated heritability of sarcoidosis at 0.66 (95% CI 0.45–0.80), with an 80-fold increased risk for monozygotic co-twins.
Conclusions:
- Genetic factors play a substantial role in sarcoidosis susceptibility.
- Findings support the need for research into molecular genetic markers for sarcoidosis.
- This genetic insight could inform future diagnostic and therapeutic strategies.
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