Title : Cardiac-directed expression of a catalytically inactive adenylyl cyclase 6 protects the heart from sustained β-adrenergic stimulation.

Pub. Date : 2017

PMID : 28767701






10 Functional Relationships(s)
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1 OBJECTIVES: Increased expression of adenylyl cyclase type 6 (AC6) has beneficial effects on the heart through cyclic adenosine monophosphate (cAMP)-dependent and cAMP-independent pathways. Cyclic AMP adenylate cyclase 6 Mus musculus
2 OBJECTIVES: Increased expression of adenylyl cyclase type 6 (AC6) has beneficial effects on the heart through cyclic adenosine monophosphate (cAMP)-dependent and cAMP-independent pathways. Cyclic AMP adenylate cyclase 6 Mus musculus
3 OBJECTIVES: Increased expression of adenylyl cyclase type 6 (AC6) has beneficial effects on the heart through cyclic adenosine monophosphate (cAMP)-dependent and cAMP-independent pathways. Cyclic AMP adenylate cyclase 6 Mus musculus
4 We previously generated a catalytically inactive mutant of AC6 (AC6mut) that has an attenuated response to beta-adrenergic receptor stimulation, and, consequently, exhibits reduced myocardial cAMP generation. Cyclic AMP adenylate cyclase 6 Mus musculus
5 We previously generated a catalytically inactive mutant of AC6 (AC6mut) that has an attenuated response to beta-adrenergic receptor stimulation, and, consequently, exhibits reduced myocardial cAMP generation. Cyclic AMP adenylate cyclase 6 Mus musculus
6 Isoproterenol infusion caused deleterious effects that were attenuated by cardiac-directed AC6mut expression. Isoproterenol adenylate cyclase 6 Mus musculus
7 In addition, AC6mut mice showed superior left ventricular function, manifested by higher values for LV peak +dP/dt (p = 0.03), LV peak -dP/dt (p = 0.008), end-systolic pressure-volume relationship (p = 0.003) and cardiac output (p<0.03). dp adenylate cyclase 6 Mus musculus
8 In addition, AC6mut mice showed superior left ventricular function, manifested by higher values for LV peak +dP/dt (p = 0.03), LV peak -dP/dt (p = 0.008), end-systolic pressure-volume relationship (p = 0.003) and cardiac output (p<0.03). dp adenylate cyclase 6 Mus musculus
9 In addition, AC6mut mice showed superior left ventricular function, manifested by higher values for LV peak +dP/dt (p = 0.03), LV peak -dP/dt (p = 0.008), end-systolic pressure-volume relationship (p = 0.003) and cardiac output (p<0.03). Thymidine adenylate cyclase 6 Mus musculus
10 CONCLUSION: Mice with cardiac-directed AC6mut expression weathered the deleterious effects of continuous isoproterenol infusion better than control mice, indicating cardiac protection. Isoproterenol adenylate cyclase 6 Mus musculus