Book contents
- Liver Disease in Children
- Liver Disease in Children
- Copyright page
- Contents
- Contributors
- Preface
- Section I Pathophysiology of Pediatric Liver Disease
- Section II Cholestatic Liver Disease
- Section III Hepatitis and Immune Disorders
- Section IV Metabolic Liver Disease
- Chapter 24 Laboratory Diagnosis of Inborn Errors of Liver Metabolism
- Chapter 25 α1-Antitrypsin Deficiency
- Chapter 26 Cystic Fibrosis Liver Disease in Children
- Chapter 27 Inborn Errors of Carbohydrate Metabolism
- Chapter 28 Copper Metabolism and Copper Storage Disorders in Children
- Chapter 29 Iron Storage Disorders in Children
- Chapter 30 Heme Biosynthesis and the Porphyrias in Children
- Chapter 31 Tyrosinemia in Children
- Chapter 32 Lysosomal Storage Disorders in Children
- Chapter 33 Disorders of Bile Acid Synthesis and Metabolism in Children
- Chapter 34 Inborn Errors of Fatty Acid Oxidation
- Chapter 35 Mitochondrial Hepatopathies
- Chapter 36 Non-Alcoholic Fatty Liver Disease in Children
- Chapter 37 Peroxisomal Disorders in Children
- Chapter 38 Urea Cycle Disorders in Children
- Section V Other Considerations and Issues in Pediatric Hepatology
- Index
- References
Chapter 30 - Heme Biosynthesis and the Porphyrias in Children
from Section IV - Metabolic Liver Disease
Published online by Cambridge University Press: 19 January 2021
- Liver Disease in Children
- Liver Disease in Children
- Copyright page
- Contents
- Contributors
- Preface
- Section I Pathophysiology of Pediatric Liver Disease
- Section II Cholestatic Liver Disease
- Section III Hepatitis and Immune Disorders
- Section IV Metabolic Liver Disease
- Chapter 24 Laboratory Diagnosis of Inborn Errors of Liver Metabolism
- Chapter 25 α1-Antitrypsin Deficiency
- Chapter 26 Cystic Fibrosis Liver Disease in Children
- Chapter 27 Inborn Errors of Carbohydrate Metabolism
- Chapter 28 Copper Metabolism and Copper Storage Disorders in Children
- Chapter 29 Iron Storage Disorders in Children
- Chapter 30 Heme Biosynthesis and the Porphyrias in Children
- Chapter 31 Tyrosinemia in Children
- Chapter 32 Lysosomal Storage Disorders in Children
- Chapter 33 Disorders of Bile Acid Synthesis and Metabolism in Children
- Chapter 34 Inborn Errors of Fatty Acid Oxidation
- Chapter 35 Mitochondrial Hepatopathies
- Chapter 36 Non-Alcoholic Fatty Liver Disease in Children
- Chapter 37 Peroxisomal Disorders in Children
- Chapter 38 Urea Cycle Disorders in Children
- Section V Other Considerations and Issues in Pediatric Hepatology
- Index
- References
Summary
The porphyrias are metabolic disorders each resulting from the deficiency of a specific enzyme in the heme biosynthetic pathway (Figure 30.1 and Table 30.1) [1–6]. These enzyme deficiencies are inherited as autosomal dominant, autosomal recessive and X-linked traits, with the exception of porphyria cutanea tarda (PCT), which usually is sporadic. The porphyrias are classified as either hepatic or erythropoietic depending on the primary site of overproduction and accumulation of porphyrin precursors or porphyrins (Table 30.2) although some have overlapping features. The hepatic porphyrias are characterized by overproduction and initial accumulation of porphyrin precursors and/or porphyrins primarily in the liver, whereas in the erythropoietic porphyrias, overproduction and initial accumulation of the pathway intermediates occur primarily in bone marrow erythroid cells.
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- Liver Disease in Children , pp. 530 - 547Publisher: Cambridge University PressPrint publication year: 2021