Differential expression of carbonic anhydrase isoenzymes in various types of anemia.
BACKGROUND
The aim of the present study was to determine the concentrations of cytosolic carbonic anhydrase (CA) isoenzymes in erythrocytes of patients with aplastic, autoimmune hemolytic, iron deficiency or beta-thalassemia anemia.


METHODS
Western blotting and CA esterase activity analysis were used to analyze cytosolic erythrocyte CA isoenzymes in 118 subjects with various types of anemia and 35 healthy controls.


RESULTS
Total CA activity and CAII concentration of anemia patients were significantly higher than that of the control subjects while CAI concentration was significantly lower in patients of autoimmune hemolytic anemia (P<0.01). Compared with controls, CAIII concentration was lower in iron deficiency anemia (P<0.01), but higher in beta-thalassemia anemia (P<0.001).


CONCLUSIONS
Carbonic anhydrase isoenzymes may contribute differently to various types of anemia. CAI may be an indicator to differentiate autoimmune hemolytic anemia from other types of anemia. CAII provides the CA activity necessary for maintaining ion transport in erythrocytes while CAIII may play an agent against oxidative damage in iron deficiency and beta-thalassemia anemia.
Kuo
Wu-Hsien
WH
Division of Gasroenterology, Department of Internal Medicine, Armed-Force Taichung General Hospital, Taiping City 411, Taichung, Taiwan.
Yang
Shun-Fa
SF
Hsieh
Yih-Shou
YS
Tsai
Chiou-Sheng
CS
Hwang
Wen-Li
WL
Chu
Shu-Chen
SC
D000740:Anemia / Q000097:blood* / Q000201:enzymology*; D000741:Anemia, Aplastic / Q000097:blood / Q000201:enzymology; D000744:Anemia, Hemolytic, Autoimmune / Q000097:blood / Q000201:enzymology; D018798:Anemia, Iron-Deficiency / Q000097:blood / Q000201:enzymology; D015153:Blotting, Western; D002256:Carbonic Anhydrases / Q000097:blood*; D003600:Cytosol / Q000201:enzymology; D004912:Erythrocytes / Q000201:enzymology; D005260:Female; D006801:Humans; D007527:Isoenzymes / Q000097:blood; D008297:Male; D008875:Middle Aged; D017086:beta-Thalassemia / Q000097:blood / Q000201:enzymology
D007527:Isoenzymes; D002256:Carbonic Anhydrases