Coordinated changes in mitochondrial creatine kinase functional state, myofibrillar ATPase and performance of isolated rat heart in hypothyroidism and long-term calcium channel- and beta-blockade V. Veksler, E. Levitskaya, A. Khatkevich, I. Orekhova, Z. Khuchua, V. Kapelko. USSR Cardiology Research Center, Moscow, USSR

1992 ◽  
Vol 24 ◽  
pp. 35
Circulation ◽  
1997 ◽  
Vol 96 (9) ◽  
pp. 3148-3156 ◽  
Author(s):  
A. K. Snabaitis ◽  
M. J. Shattock ◽  
D. J. Chambers

2011 ◽  
Vol 155 (1) ◽  
pp. 27-32 ◽  
Author(s):  
Lauro Figueroa-Valverde ◽  
Francisco Diaz-Cedillo ◽  
Maria Lopez-Ramos ◽  
Elodia Garcia-Cervera ◽  
Karen Quijano ◽  
...  

1982 ◽  
Vol 77 (1) ◽  
pp. 33-38 ◽  
Author(s):  
Allan S. Manning ◽  
Michael J. Shattock ◽  
Steven C. Dennis ◽  
David J. Hearse

2019 ◽  
pp. 909-920 ◽  
Author(s):  
E.S. Prokudina ◽  
N.V. Naryzhnaya ◽  
A.V. Mukhomedzyanov ◽  
A.S. Gorbunov ◽  
Y. Zhang ◽  
...  

Chronic continuous normobaric hypoxia (CNH) increases cardiac tolerance to ischemia/reperfusion injury in vivo and this effect is mediated via µ and δ2 opioid receptors (ORs) activation. CNH has also been shown to be cardioprotective in isolated rat heart. In this study, we hypothesize that this cardioprotective effect of CNH is mediated by activation of µ and δ2 ORs and preservation of mitochondrial function. Hearts from rats adapted to CNH (12 % oxygen) for 3 weeks were extracted, perfused in the Langendorff mode and subjected to 45 min of global ischemia and 30 min of reperfusion. Intervention groups were pretreated for 10 min with antagonists for different OR types: naloxone (300 nmol/l), the selective δ OR antagonist TIPP(ψ) (30 nmol/l), the selective δ1 OR antagonist BNTX (1 nmol/l), the selective δ2 OR antagonist naltriben (1 nmol/l), the selective peptide μ OR antagonist CTAP (100 nmol/l) and the selective κ OR antagonist nor-binaltorphimine (3 nmol/l). Creatine kinase activity in coronary effluent and cardiac contractile function were monitored to assess cardiac injury and functional impairment. Additionally, cardiac tissue was collected to measure ATP and to isolate mitochondria to measure respiration rate and calcium retention capacity. Adaptation to CNH decreased myocardial creatine kinase release during reperfusion and improved the postischemic recovery of contractile function. Additionally, CNH improved mitochondrial state 3 and uncoupled respiration rates, ADP/O, mitochondrial transmembrane potential and calcium retention capacity and myocardial ATP level during reperfusion compared to the normoxic group. These protective effects were completely abolished by naloxone, TIPP(ψ), naltriben, CTAP but not BNTX or nor-binaltorphimine. These results suggest that cardioprotection associated with adaptation to CNH is mediated by µ and δ2 opioid receptors activation and preservation of mitochondrial function.


2011 ◽  
Vol 52 (05) ◽  
pp. 365-370 ◽  
Author(s):  
Dragan Djuric ◽  
Veselin Mitrovic ◽  
Vladimir Jakovljevic

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