Study summary · research use only
An engineered non-erythropoietic erythropoietin-derived peptide, ARA290, attenuates doxorubicin induced genotoxicity and oxidative stress
Plain-language summary
Paraphrased from the published abstract below — not a verdict on whether anything works.
This in vitro cell-line study (species not specified) examined whether ARA290, an engineered non-erythropoietic peptide derived from erythropoietin, affected doxorubicin (DOX)-induced genotoxicity and oxidative stress in HepG2, HGF, and stem cell lines. Cells were treated with ARA290 (50-400 nM) and DOX (1 μM) in a pretreatment design, with cytotoxicity assessed by MTT assay and genotoxicity by micronucleus and comet assays. The authors report that ARA290 reduced the percentage of DNA in tail and the frequency of micronuclei induced by DOX, and was associated with reduced DOX-induced oxidative stress, inflammation markers, and apoptotic cell death markers across the tested cell lines.
Abstract
Erythropoietin (EPO) applies anti-inflammatory, anti-apoptotic, anti-oxidant and cytoprotective effects besides its hematopoietic action. A nonhematopoietic peptide engineered from EPO, ARA 290, interacts selectively with the innate repair receptor and has similar possessions. ARA290 mediates tissue protection without hematopoietic side-effects of EPO which limit its clinical application. Doxorubicin (DOX) is the broad-spectrum chemotherapeutic agent, but its use is limited by the development of nonspecific toxicity on noncancerous tissues especially in cardiac cells. Mechanisms behind the DOX-induced toxicities are enhanced level of oxidative damage, inflammation and apoptosis. In the present study, we have investigated whether ARA290 acts as a chemoprotective agent modulating the cytotoxicity, genotoxicity and oxidative stress induced in vitro by DOX. The genoprotective effect of ARA290 on DOX-induced toxicity in three cell line (HepG2, HGF & Stem cell) were assessed. Cells were treated with ARA290 (50-400 nM) and DOX (1 μM) in pretreatment condition. Cytotoxicity was evaluated using the MTT assay, genoprotective effect of ARA290 were evaluated using the micronucleus test and comet assay. AR290 significantly reduced the percentage of DNA in tail and the frequency of micronuclei induced by DOX. Besides, DOX impaired anti-oxidant defense enzyme activities and induced inflammation and apoptotic cell death. ARA290 markedly attenuated DOX induced oxidative stress and protected against DOX induced inflammation and apoptotic cell death. This result proposes that ARA290 can act as a protective agent, reducing DOX-induced DNA damage and oxidative stress, and it is possible that this protection could also extend to cardiac cells.
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