Impaired synthesis of heme oxygenase-1 in Fanconi anemia cells can be rescued by transfection of Fanconi wild-type cDNA

Biological Chemistry
Maria KontouManfred Schweiger

Abstract

Fanconi anemia is a fatal, hereditary chromosome instability syndrome of early childhood with progressive pancytopenia and cancer-proneness. Hypersensitivity to alkylating agents points to DNA repair inefficiency. Excess reactive oxygen intermediates and hypersensitivity to oxygen, all features of Fanconi anemia cells, give evidence for a disturbed oxidative metabolism. Here, we report that expression of the inducible heme oxygenase-1, an essential antioxidative defense protein, is impaired in Fanconi anemia cells and can be reinstated with the transfection of Fanconi A wild-type cDNA. A causative interaction of Fanconi anemia proteins with transcription of selected proteins is indicated. The results enlighten the oxygen sensitivity in Fanconi anemia.

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