Abstract
Background
In this study, a comparison between centrally and systemically administered erythropoietin (EPO) was performed on nephroprotection during hemorrhagic shock (HS) in male rats.
Methods
Male rats were allocated into four experimental groups. (1) Sham; a guide cannula was inserted into the left lateral ventricle and other cannulas were placed into the left femoral artery and vein. (2) HS; stereotaxic surgery was done to insert a cannula in the left lateral ventricle and after a 7-day recovery; hemorrhagic shock and resuscitation were performed. (3) EPO-systemic; the procedure was the same as the HS group except that animals received 300 IU/kg erythropoietin into the femoral vein immediately before resuscitation. (4) EPO-central; animals was treated with erythropoietin (2 IU/rat) into the left lateral ventricle before resuscitation. Arterial oxygen saturation (SaO2) was measured during experiments. Urine and renal tissue samples were stored for ex-vivo indices assessments.
Results
Erythropoietin (systemically/centrally administered) significantly improved SaO2, renal functional and oxidative stress parameters and decreased renal inflammatory (TNF-α and IL-6) mRNA expression compared to the HS group. EPO-treated groups showed a decrease in active form of caspase-3 protein level and an increase in autophagy activity in comparison with the HS group.
Conclusion
Considering the fact that the effective dose of systemic EPO (300 IU/kg) was roughly 50 times higher than that of central administration (2 IU/rat), centrally administered EPO was accompanied by more advantageous consequences than systemic way. EPO is likely to act as a neuro-modulator or neuro-mediator in the central protection of organs including the kidneys.
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Data Availability
All data will be available by reasonable request.
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This research was supported by a grant (no = 27721) from Tehran University of Medical Sciences.
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Experimental protocols and animal care methods in the experiments were approved by the Animal Experimental Committee at Tehran University of Medical Sciences (Project number: 27721-30-04-93, Approval ID: 27721).
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Ranjbaran, M., Kadkhodaee, M., Adelipour, M. et al. A comparison between centrally and systemically administered erythropoietin on kidney protection in a model of fixed-volume hemorrhagic shock in male rats. Mol Biol Rep 50, 4781–4789 (2023). https://doi.org/10.1007/s11033-023-08412-6
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DOI: https://doi.org/10.1007/s11033-023-08412-6