JNK1 is required to preserve cardiac function in the early response to pressure overload.
Journal Article (Journal Article)
Cardiac stress consistently activates c-Jun NH(2)-terminal kinase (JNK) pathways, however the role of different members of the JNK family is unclear. In this study, we applied pressure overload (TAC) in mice with selective deletion of the three JNK genes (Jnk1(-/-), Jnk2(-/-), and Jnk3(-/-)). Following TAC, all three JNK knockout mouse lines developed cardiac hypertrophy similar to wild-type mice (WT), but only JNK1(-/-) mice displayed a significant reduction in fractional shortening after 3 and 7 days of pressure overload, associated with a significant increase in terminal deoxynucleotidyl transferase-mediated dUTP nick end-labeling staining and marked inflammatory infiltrate. After the acute deterioration stage, JNK1(-/-) mice underwent a slow recovery followed by a steady progression of cardiac dysfunction, becoming indistinguishable from WT after 12 weeks of TAC. These data suggest that JNK1 plays a protective role in response to pressure overload, preventing the early deterioration in cardiac function following an acute increase in afterload.
- Tachibana, H; Perrino, C; Takaoka, H; Davis, RJ; Naga Prasad, SV; Rockman, HA
- May 19, 2006
Volume / Issue
- 343 / 4
Start / End Page
- 1060 - 1066
International Standard Serial Number (ISSN)
Digital Object Identifier (DOI)
- United States