Abstract：
:Dilated cardiomyopathy (DCM) is a severe disorder caused by medications or genetic mutations. D5 dopamine receptor (D5R) gene knockout (D5-/-) mice have cardiac hypertrophy and high blood pressure. To investigate the role and mechanism by which the D5R regulates cardiac function, we generated cardiac-specific human D5R F173L(hD5F173L-TG) and cardiac-specific human D5R wild-type (hD5WT-TG) transgenic mice, and H9c2 cells stably expressing hD5F173L and hD5WT. We found that cardiac-specific hD5F173L-TG mice, relative to hD5WT-TG mice, presented with DCM and increased cardiac expression of cardiac injury markers, NADPH oxidase activity, Nrf2 degradation, and activated ERK1/2/JNK pathway. H9c2-hD5F173L cells also had an increase in NADPH oxidase activity, Nrf2 degradation, and phospho-JNK (p-JNK) expression. A Nrf2 inhibitor also increased p-JNK expression in H9c2-hD5F173L cells but not in H9c2-hD5WT cells. We suggest that the D5R may play an important role in the preservation of normal heart function by inhibiting the production of reactive oxygen species, via inhibition of NADPH oxidase, Nrf2 degradation, and ERK1/2/JNK pathways.
journal_name
Redox Bioljournal_title
Redox biologyauthors
Jiang X,Liu Y,Liu X,Wang W,Wang Z,Hu Y,Zhang Y,Zhang Y,Jose PA,Wei Q,Yang Zdoi
10.1016/j.redox.2018.07.008subject
Has Abstractpub_date
2018-10-01 00:00:00pages
134-146issn
2213-2317pii
S2213-2317(18)30554-8journal_volume
19pub_type
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