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Biochem 44 Erythrocytes
Lieberman Third Edition
10
Biochemistry
Graduate
02/12/2011

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Term
pyruvate kinnase deficiency
Definition
leads to hemolytic anemia because ATP is decreased 50%. Causes 2,3-BPG elevation 2-3 fold
Term
Methemoglobinemia
Definition
deficiency in cytochrome b5 reductase or inherited hemoglobin M. Appear cyanotic, ingestion of oxidants. Use ascorbic acid or methylene blue.
Term
G6PD deficiency
Definition
most common enzyme deficiency. Resistant to malaria. Anemia with primaquine. X-linked.
Term
Pyridoxine (B6) deficiencies
Definition
microcytic hypochromic anemia due to low heme production
Term
Lead Poisoning
Definition
delta-ALA dehydratase (zinc) and ferrochelatase are inactivated. delta-ALA and protoporthyrin IX accumulate causing anemia and fatigue
Term
Porhyrias
Definition
deficiencies in heme biosynthesis. neuropsyciatric symptoms. Photosensitivity
Term
Phenobarbital
Definition
induce P450 enzymes. Free heme levels fall and delta-ALA synthase is induced
Term
SCID
Definition
interleukin 2 receptor. Unable to activate JAK3.
Term
Mutant erythropoietin receptor
Definition
Erythrocytemia, EPO receptor cannot be deactivated by SHP-1. Sustained JAK2 and STAT5 activation
Term
Fanconi anemia
Definition
bone marrow failure related to JAK/STAT
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