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Hepatobiliary implications and complications in protoporphyria, a 20-year study.
1Department of clinical Biochemistry, Faculty of Medicine, Phillip University, Marburg, Federal Republic of Germany.
Clinical Biochemistry
|June 1, 1989
Summary
Erythropoietic protoporphyria can lead to significant liver complications, even cirrhosis, with elevated protoporphyrin levels indicating disease severity. Pathologic coproporphyrinuria is a key indicator of hepatobiliary involvement.
Area of Science:
- Biochemistry
- Hepatology
- Genetics
Background:
- Erythropoietic protoporphyria (EPP) is a rare genetic disorder.
- Photosensitivity is a common symptom, but liver disease can be the initial presentation.
- EPP involves the accumulation of protoporphyrins in red blood cells and plasma.
Purpose of the Study:
- To investigate the clinical and biochemical features of EPP over 20 years.
- To identify markers for hepatobiliary complications in EPP.
- To evaluate the role of cholic acid treatment.
Main Methods:
- Longitudinal study of 55 EPP patients.
- Biochemical analysis of protoporphyrin and coproporphyrin levels in blood, feces, and urine.
- Clinical assessment of liver function and disease progression.
Main Results:
- 35% of patients showed impaired liver function, with males predominating.
- 13% developed liver cirrhosis; two patients died from fatal liver disease.
- Elevated erythrocyte protoporphyrin and pathologic coproporphyrinuria (isomer I) were associated with liver complications.
Conclusions:
- Pathologic coproporphyrinuria with increased isomer I is a sensitive marker for hepatobiliary disease in EPP.
- Liver involvement in EPP may be more common than previously thought.
- Treatment with cholic acids can improve biochemical and clinical outcomes.