Title : Cardiac-specific overexpression of catalase attenuates paraquat-induced myocardial geometric and contractile alteration: role of ER stress.

Pub. Date : 2010 Dec 15

PMID : 20937379






5 Functional Relationships(s)
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1 Cardiac-specific overexpression of catalase attenuates paraquat-induced myocardial geometric and contractile alteration: role of ER stress. Paraquat catalase Mus musculus
2 This study examined the influence of cardiac-specific overexpression of catalase, an antioxidant detoxifying H(2)O(2), on paraquat-induced myocardial geometric and functional alterations, with a focus on ER stress. Paraquat catalase Mus musculus
3 Whereas the catalase transgene itself did not alter myocardial geometry and function, it mitigated or significantly attenuated paraquat-elicited myocardial geometric and functional changes. Paraquat catalase Mus musculus
4 Paraquat promoted overt apoptosis and ER stress as evidenced by increased caspase-3 activity, apoptosis, and ER stress markers including Bax, Bcl-2, GADD153, calregulin, and phosphorylated JNK, IRE1alpha, and eIF2alpha; all were ablated by the catalase transgene. Paraquat catalase Mus musculus
5 Taken together, these data revealed that catalase may rescue paraquat-induced myocardial geometric and functional alteration possibly by alleviating JNK-mediated ER stress. Paraquat catalase Mus musculus