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Updated: Aug 16, 2026
Anti-Nuclear Antibody Screening Using HEp-2 Cells
Published on: June 23, 2014
Similar anti-mitochondrial antibody reactivity profiles in familial primary biliary cirrhosis
Yoshizumi Hayase1, Shinji Iwasaki, Naoaki Akisawa
1The Department of Gastroenterology and Hepatology, Kochi Medical School, Nankoku, Kochi 783-8505, Japan.
Aims:
: Familial accumulation of primary biliary cirrhosis (PBC) has been documented. To examine the importance of genetic factors, we carried out family study of the disease with a particular focus on the reactivity profiles of anti-mitochondrial antibodies (AMA).
Patients And Methods:
: Eighty-five patients with PBC that we experienced in the period of 1982-2003 were investigated, retrospectively. Twelve patients from a total of six families were investigated clinically and immunologically.
Results:
: Of the 85 patients, 5 (5.9%) were found to have a family history of PBC. The six PBC family relationships consisted of four cases of sisters and two cases of a mother and daughter. HLA haplotypes were identical in two cases and were half-similar in the other cases. AMA titers were almost the same in three families and in five of the six families, sera from individual members within the family showed similar AMA-reactive bands in immunoblotting.
Conclusion:
: The prevalence of PBC is strikingly increased in family members (frequency of 5.9%). Sera from PBC patients of the same family showed the same AMA reactivity profile, suggesting that development of AMA may be greatly influenced by certain underlying genetic factors. Large-scale genomic studies of familial PBC will be critical to identify mechanisms of disease susceptibility.
Insights
Primary biliary cirrhosis (PBC) shows increased prevalence in families, with similar anti-mitochondrial antibody (AMA) reactivity profiles observed among relatives. This suggests a significant genetic influence on AMA development in familial PBC.
Area of Science:
- Hepatology
- Immunology
- Genetics
Background:
- Familial clustering of primary biliary cirrhosis (PBC) suggests a genetic component.
- Anti-mitochondrial antibodies (AMA) are key biomarkers for PBC diagnosis.
Purpose of the Study:
- To investigate the role of genetic factors in PBC by examining familial aggregation.
- To analyze the anti-mitochondrial antibody (AMA) reactivity profiles in PBC families.
Main Methods:
- Retrospective study of 85 PBC patients diagnosed between 1982-2003.
- Clinical and immunological investigation of 12 patients from six affected families.
- Analysis of AMA titers and immunoblotting reactivity patterns within families.
Main Results:
- A family history of PBC was identified in 5.9% of patients.
- Identical or half-similar HLA haplotypes were observed in affected family members.
- Consistent AMA reactivity profiles, including similar bands on immunoblotting, were found within families.
Conclusions:
- The increased prevalence of PBC in relatives highlights the importance of genetic predisposition.
- Shared AMA reactivity profiles within families suggest genetic factors influence AMA development.
- Further genomic studies are crucial for understanding susceptibility mechanisms in familial PBC.
