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Recombinant human erythropoietin increases survival and reduces neuronal apoptosis in a murine model of cerebral malaria

2008; BioMed Central; Volume: 7; Issue: 1 Linguagem: Inglês

10.1186/1475-2875-7-3

1475-2875

Lothar Wiese, Casper Hempel, Milena Penkowa, Nikolai Kirkby, Jørgen A. L. Kurtzhals,

Iron Metabolism and Disorders

Cerebral malaria (CM) is an acute encephalopathy with increased pro-inflammatory cytokines, sequestration of parasitized erythrocytes and localized ischaemia. In children CM induces cognitive impairment in about 10% of the survivors. Erythropoietin (Epo) has - besides of its well known haematopoietic properties - significant anti-inflammatory, antioxidant and anti-apoptotic effects in various brain disorders. The neurobiological responses to exogenously injected Epo during murine CM were examined.Female C57BL/6j mice (4-6 weeks), infected with Plasmodium berghei ANKA, were treated with recombinant human Epo (rhEpo; 50-5000 U/kg/OD, i.p.) at different time points. The effect on survival was measured. Brain pathology was investigated by TUNEL (Terminal deoxynucleotidyl transferase (TdT)-mediated deoxyuridine triphosphate (dUTP)-digoxigenin nick end labelling), as a marker of apoptosis. Gene expression in brain tissue was measured by real time PCR.Treatment with rhEpo increased survival in mice with CM in a dose- and time-dependent manner and reduced apoptotic cell death of neurons as well as the expression of pro-inflammatory cytokines in the brain. This neuroprotective effect appeared to be independent of the haematopoietic effect.These results and its excellent safety profile in humans makes rhEpo a potential candidate for adjunct treatment of CM.