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Familial IgA nephropathy in southeastern Kentucky
K A Lavigne1, S Y Woodford, C V Barker
1Children's Foundation Research Center, Le Bonheur Children's Medical Center, Memphis, TN 38103-2893, USA.
Genetic factors likely contribute to IgA nephropathy (IgAN). This study investigated IgAN pedigrees in Clay County, KY, suggesting a possible low-penetrance ancestral mutation influencing disease prevalence.
Area of Science:
- Nephrology
- Genetics
- Medical Research
Background:
- Genetic factors in IgA nephropathy (IgAN) pathogenesis were first suggested by Pike County, KY pedigrees.
- Additional IgAN pedigrees have been identified in northern Italy and recently in Clay County, KY.
Purpose of the Study:
- To evaluate and expand IgAN patient pedigrees in Clay County, KY.
- To gain insight into IgAN inheritance mechanisms.
- To assess the potential influence of a founder effect on IgAN prevalence in the region.
Main Methods:
- Utilized personal genealogical data collected since 1980 from IgAN patients and relatives in eastern KY.
- Constructed detailed pedigrees incorporating patients born in Clay County.
- Analyzed the familial relationships among 11 IgAN patients from Clay County.
Main Results:
- Nine of 11 IgAN patients born in Clay County, KY, were part of five distinct pedigrees.
- Each pedigree contained between 3 and 11 IgAN patients, indicating familial clustering.
Conclusions:
- The findings suggest a potential low-penetrance ancestral mutation within IgAN kindreds in Clay County.
- This mutation may contribute to the observed prevalence of IgAN in the region.
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