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Clinically important immunological processes in acute and fulminant hepatitis, mainly due to hepatitis B virus
Insights
Complement pathway deficiencies and impaired cellular immunity are evident in children with acute hepatitis (AH) and fulminant hepatic failure (FHF). C3 levels correlate with disease severity, suggesting their utility in monitoring acute liver disease.
Area of Science:
- Immunology
- Hepatology
- Pediatrics
Background:
- Acute hepatitis (AH) and fulminant hepatic failure (FHF) in children present with varying clinical outcomes.
- Understanding the immunological underpinnings of AH and FHF is crucial for prognosis and management.
- Hepatitis B virus (HBV) infection is a significant factor in pediatric liver disease.
Purpose of the Study:
- To investigate and compare immunological functions in African children with AH and FHF.
- To identify clinical criteria that correlate with disease severity and outcomes.
- To evaluate the role of complement pathways and cellular immunity in pediatric liver failure.
Main Methods:
- Studied immunological functions (complement pathways, cellular immunity) on admission in 15 children with AH and 11 with FHF.
- Compared immunological parameters with normal controls.
- Assessed cellular immunity via phytohaemagglutinin and HBsAg lymphocyte transformation and leucocyte migration inhibition.
- Correlated immunological markers, including C3 and prothrombin index, with clinical severity and outcomes.
Main Results:
- Significant diminution of classical and alternative complement pathways and total haemolytic complement observed in FHF compared to AH, and in both groups versus controls.
- Cellular immunity was more impaired in FHF than AH, with reduced indices in both patient groups compared to controls.
- C3 levels showed the strongest correlation with clinical severity, being lowest in FHF and lower in AH patients who developed transient liver failure.
- Prothrombin index was less sensitive in differentiating disease severity.
Conclusions:
- Impaired complement pathways and cellular immunity are characteristic of AH and FHF in children.
- C3 levels are a valuable indicator for monitoring disease severity and prognosis in pediatric acute liver disease.
- These immunological findings can aid in clinical decision-making and patient management.
Abstract:
Clinically useful criteria were found by studying immunological functions on admission in 15 African children with acute hepatitis (AH) (11 of whom were HBsAg positive) and in 11 children with fulminant hepatic failure (FHF) (8 of whom were HBsAg positive), and by comparing these results with normal controls. Nine of the FHF patients died. All the AH patients survived despite the development of transient liver failure in seven. There was significant diminution of components of the classical and alternative pathways of complement and total haemolytic complement in FHF compared with AH, and in both groups in comparison with controls. Cellular immunity tested by phytohaemagglutinin and HBsAg transformation of lymphocytes and leucocyte migration inhibition with HBsAg, were more impaired in FHF than AH. These indices were reduced in both groups of patients compared with controls. The most important index correlating with severity of clinical disease was C3. It was lowest in FHF, but within this group was highest in 2 patients who survived, and in AH the C3 on admission was significantly lower in patients who subsequently showed signs of transient liver failure than in those who did not. The prothrombin index was less sensitive in differentiating serious from mild illness. It is suggested that C3 levels can be helpful in monitoring patients with acute liver disease.