Early involvement of hepatic parenchymal cells in erythrohepatic protoporphyria? An ultrastructural study of patients with and without overt liver disease and the effect of chenodeoxycholic acid treatement
| Autor: | M.I. Cleton, Harold Baart de La Fajlle, Louk H. P. M. Raedemakers, Jan van Hattum, Carole Kooliman |
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| Rok vydání: | 1990 |
| Předmět: |
Adult
Male Pathology medicine.medical_specialty Porphyrins Adolescent Protoporphyrins Biology Chenodeoxycholic Acid Bone canaliculus Gastroenterology Porphyrias chemistry.chemical_compound Liver disease Chenodeoxycholic acid Internal medicine Parenchyma Biopsy medicine Humans Child Hepatology medicine.diagnostic_test Liver Diseases Bile Canaliculi Biopsy Needle Middle Aged medicine.disease Microscopy Electron Liver chemistry Liver biopsy Ultrastructure Female Protoporphyrin |
| Zdroj: | Hepatology. 11:449-457 |
| ISSN: | 1527-3350 0270-9139 |
| DOI: | 10.1002/hep.1840110316 |
| Popis: | Liver biopsy specimens obtained from two groups of erythrohepatic protoporphyria patients were studied histopathologically and ultrastructurally. Group 1 comprised seven erythrohepatic protoporphyria patients with a normal liver histology; from two patients liver biopsy specimens were available before and after 1 yr of chenodeoxycholic acid treatment. Group 2 consisted of four patients with a history of liver disease and liver histopathology; three patients were observed before and after 1 yr of chenodeoxycholic acid treatment. Liver specimens of nine kidney transplant donors served as controls. Unlike the morphology at the light microscopic level, the ultrastructure of hepatic parenchymal cells was affected in both groups of erythrohepatic protoporphyria patients. In both groups the nuclei, endoplasmic reticulum, lateral plasma membranes and bile canaliculi were altered. Collagen fibers were frequently present. In addition, in group 2 bile thrombi and intracytoplasmic protoporphyrin crystals were observed. After chenodeoxycholic acid administration, the latter feature had diminished. It is concluded that (a) in erythrohepatic protoporphyria ultrastructural changes are present in the hepatic parenchymal cells even in early stages of the disease. Changes in bile canalicular ultrastructure suggest a defective hepatic excretory function, probably caused by the toxic effect of protoporphyrin. (b) Chenodeoxycholic acid administration causes no distinct improvement of the ultrastructure of organelles in the hepatic parenchymal cell or the bile canalicular system but may decrease crystalline protoporphyrin deposition in the liver. |
| Databáze: | OpenAIRE |
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