JOURNAL ARTICLE
RESEARCH SUPPORT, NON-U.S. GOV'T
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Cardioprotective effect of cannabidiol in rats exposed to doxorubicin toxicity.

The potential protective effect of cannabidiol, the major non-psychotropic Cannabis constituent, was investigated against doxorubicin cardiotoxicity in rats. Cardiotoxicity was induced by six equal doses of doxorubicin (2.5mgkg(-1) i.p., each) given at 48h intervals over two weeks to achieve a total dose of 15mgkg(-1). Cannabidiol treatment (5mgkg(-1)/day, i.p.) was started on the same day of doxorubicin administration and continued for four weeks. Cannabidiol significantly reduced the elevations of serum creatine kinase-MB and troponin T, and cardiac malondialdehyde, tumor necrosis factor-α, nitric oxide and calcium ion levels, and attenuated the decreases in cardiac reduced glutathione, selenium and zinc ions. Histopathological examination showed that cannabidiol ameliorated doxorubicin-induced cardiac injury. Immunohistochemical analysis revealed that cannabidiol significantly reduced the expression of inducible nitric oxide synthase, nuclear factor-κB, Fas ligand and caspase-3, and increased the expression of survivin in cardiac tissue of doxorubicin-treated rats. These results indicate that cannabidiol represents a potential protective agent against doxorubicin cardiac injury.

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