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Relationship between secretory IgA, IgA-containing (C3-fixing) circulating immune complexes, and complement
Scandinavian Journal of Gastroenterology
|March 1, 1986
Summary
This study found elevated secretory IgA, total IgA, and IgA-containing circulating immune complexes (IgA-CIC) in patients with biliary tract issues. These immune markers correlated with complement component C3 levels, especially in obstructive jaundice cases.
Area of Science:
- Immunology
- Gastroenterology
- Biochemistry
Background:
- Biliary tract stones and tumors can trigger immune responses.
- Immune system components like immunoglobulins and complement may be altered in these conditions.
Purpose of the Study:
- To investigate serum levels of secretory IgA, IgA-CIC, complement components (C3, C4), and major immunoglobulins.
- To explore correlations between these immune markers and the presence of obstructive jaundice in patients with biliary tract or pancreatic pathologies.
Main Methods:
- Measurement of serum secretory IgA, IgA-CIC, C3, C4, and major immunoglobulins.
- Comparison of levels between patients (with/without obstructive jaundice) and healthy controls.
Main Results:
- Secretory IgA and total IgA levels were increased in patients, irrespective of jaundice.
- C3 and C4 levels were significantly higher in patients compared to controls.
- In obstructive jaundice, increased secretory IgA, total IgA, and IgA-CIC correlated with elevated C3.
Conclusions:
- Elevated IgA and complement components are associated with biliary tract and pancreatic diseases.
- Complement component C3 may play a role in the immune response involving IgA in obstructive jaundice.