Related Experiment Videos
Characterization of hepatitis B e antigen from human breast milk
Zhonghua Minguo Wei Sheng Wu Ji Mian Yi Xue Za Zhi = Chinese Journal of Microbiology and Immunology
|February 1, 1986
Summary
Hepatitis B e antigen (HBeAg) was detected in 20% of breast milk from carrier mothers. This milk also showed high IgA levels and specific polypeptide structures, differing from serum HBeAg.
Area of Science:
- Hepatology
- Virology
- Immunology
Background:
- Hepatitis B virus (HBV) transmission routes are critical for prevention.
- Breast milk is a potential, yet understudied, transmission route for HBV.
- Hepatitis B e antigen (HBeAg) presence in milk may indicate infectivity.
Purpose of the Study:
- To investigate the presence and characteristics of Hepatitis B e antigen (HBeAg) in breast milk from carrier mothers.
- To compare milk-derived HBeAg with serum-derived HBeAg.
- To explore potential immunological factors in HBeAg-positive breast milk.
Main Methods:
- Radioimmunoassay for HBeAg detection in milk samples.
- Cesium chloride (CsCl) gradient ultracentrifugation to determine particle density.
- Ammonium sulfate precipitation and polyacrylamide gel electrophoresis (PAGE) for protein analysis.
- Immunoglobulin A (IgA) quantification.
Main Results:
- HBeAg detected in 20% of milk samples from HBsAg carrier mothers.
- Milk HBeAg particle density peaked at 1.32 g/ml via ultracentrifugation.
- Milk HBeAg exhibited distinct properties compared to serum HBeAg after precipitation.
- PAGE revealed five polypeptide bands (8–68 kDa) in milk HBeAg.
- Significantly elevated IgA levels were observed in HBeAg-positive milk.
Conclusions:
- HBeAg can be present in breast milk of Hepatitis B surface antigen (HBsAg) carrier mothers.
- Milk-derived HBeAg possesses unique biochemical characteristics compared to serum HBeAg.
- Elevated IgA in HBeAg-positive milk may suggest an immune response or role in viral presence.