2014
DOI: 10.1177/0003319714536602
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Acute Cardiotoxic Effects of Adjuvant Trastuzumab Treatment and its Relation to Oxidative Stress

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Cited by 8 publications
(13 citation statements)
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“…MPO is an enzyme secreted by polymorphonuclear leukocytes that is proatherogenic and prooxidant (20). It is believed to be a marker of oxidative stress (20), 1 of the central mechanisms of doxorubicin cardiotoxicity (21), as well as potentially related to ErbB2 inhibition by trastuzumab (22, 23). In our study, it is also possible that the MPO increases from doxorubicin persisted into the period when trastuzumab was administered.…”
Section: Discussionmentioning
confidence: 99%
“…MPO is an enzyme secreted by polymorphonuclear leukocytes that is proatherogenic and prooxidant (20). It is believed to be a marker of oxidative stress (20), 1 of the central mechanisms of doxorubicin cardiotoxicity (21), as well as potentially related to ErbB2 inhibition by trastuzumab (22, 23). In our study, it is also possible that the MPO increases from doxorubicin persisted into the period when trastuzumab was administered.…”
Section: Discussionmentioning
confidence: 99%
“…Some recent studies have suggested that trastuzumab-mediated cardiotoxicity may be a result of the accumulation of ROS which increased oxidative stress inside the cell, as a consequence of the blockage of the HER2 pathway. 12 The same study also suggested that, as erythroid cells may also express HER2 in their membranes, 13 this may also cause red blood cell death in vitro due to trastuzumab, which may lead to hemolytic crisis in patients with G6PD deficiency.…”
Section: Discussionmentioning
confidence: 96%
“…Increased production or insufficient elimination of reactive oxygen radicals due to inhibition of HER-2 receptors was shown to cause cardiomyocyte death [27]. Dirican et al reported increased level of reactive oxygen radicals and decreased level of antioxidant enzymes 1 day after the initiation of adjuvant trastuzumab therapy, and this finding was associated with the decrease in LVEF [28]. Based on this finding, increased level of free oxygen radicals after trastuzumab therapy was considered to cause impairment of longitudinal mechanical function of the left ventricle in the early period.…”
Section: Discussionmentioning
confidence: 99%