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Possible oxidative stress involvement in congenital dyserythropoietic anemia type 1
D Mazor1, J Kapelushnik, H Shalev
1The Dr. J. Kaufmann Hematology Laboratory, Physiology Department, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer-Sheva, Israel.
Insights
Congenital dyserythropoietic anemia type 1 (CDA1) in children shows reduced catalase levels and prolonged glycerol lysis time. While some oxidative damage indicators exist, oxidative stress is not definitively proven as a cause of anemia in these patients.
Area of Science:
- Hematology
- Biochemistry
- Pediatrics
Background:
- Congenital dyserythropoietic anemia type 1 (CDA1) is associated with iron overload and potential oxidative damage.
- The pathogenesis of CDA1 may involve oxidative stress, necessitating further investigation.
Purpose of the Study:
- To investigate the role of oxidative stress in the pathogenesis of CDA1.
- To evaluate markers of oxidative stress and antioxidant capacity in pediatric CDA1 patients.
Main Methods:
- Analysis of blood samples from 10 pediatric CDA1 patients from Bedouin families.
- Measurement of superoxide dismutase, catalase, methemoglobin, plasma total thiols, plasma total antioxidant capacity, and glycerol lysis time.
- Correlation analysis between ferritin levels and catalase values.
Main Results:
- CDA1 patients exhibited normal superoxide dismutase, methemoglobin, trolox equivalent antioxidant capacity, and total plasma thiol levels.
- Significantly reduced average catalase levels (P<0.001) and prolonged glycerol lysis time (P<0.001) were observed in CDA1 patients.
- Elevated ferritin levels in CDA1 patients showed a positive correlation with catalase values (r = 0.74, P = 0.022).
Conclusions:
- Oxidative stress was not definitively proven in pediatric CDA1 patients.
- While some indicators of oxidative damage were present, they may not be directly linked to the anemia mechanism in CDA1.
- Further research is needed to elucidate the precise role of oxidative stress in CDA1 pathogenesis.
Introduction:
Congenital dyserythropoietic anemia type 1 (CDA1) patients may suffer from iron overload, associated with oxidative damage. The aim of this study was to evaluate possible involvement of oxidative stress in the pathogenesis of CDA1.
Study Design:
: Blood samples from 10 children diagnosed as CDA1 patients from five Bedouin families, were studied. In this study, activities of superoxide dismutase and catalase were evaluated as well as methemoglobin, plasma total thiols, plasma total antioxidant capacity and glycerol lysis time.
Results:
Normal values were found for superoxide dismutase, methemoglobin, trolox equivalent antioxidant capacity and total plasma thiols in CDA1 patients. However average catalase levels were significantly reduced (P<0.001) and glycerol lysis test was significantly prolonged (P<0.001). Ferritin levels, which were slightly increased in all patients, positively correlated with catalase values (r = 0.74, P = 0.022).
Conclusion:
Oxidative stress has not been proven in CDA1 pediatric patients. Some indications of oxidative damage exist, but it may not be directly related to the mechanism of anemia.