Key result
Ischemia-reperfusion injury in rat hearts decreased Na+-K+-ATPase activity and subunit content, which was attenuated more effectively by the calpain inhibitor MDL28170 than the MMP inhibitor doxycycline.
Why the study?
Does inhibition of calpain or MMPs prevent the degradation of Na(+)-K(+)-ATPase subunits and activity in rat hearts subjected to ischemia-reperfusion injury?
Does inhibition of calpain or MMPs prevent the degradation of Na(+)-K(+)-ATPase subunits and activity in rat hearts subjected to ischemia-reperfusion injury?
Activation of calpain and MMP-2 during ischemia-reperfusion injury contributes to the depression of Na(+)-K(+)-ATPase activity and degradation of its subunits, which can be attenuated by protease inhibitors.
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Calpain inhibition may better preserve Na+-K+-ATPase in rodent IR than MMP inhibition; leaves open translation to human cardioprotection.
Müller et al. (2012) studied Ischemia-reperfusion injury. Ischemia-reperfusion vs. Control hearts was evaluated on Na(+)-K(+)-ATPase activity and subunit protein content, calpain and MMP activities. Ischemia-reperfusion injury in rat hearts decreased Na+-K+-ATPase activity and subunit content, which was attenuated more effectively by the calpain inhibitor MDL28170 than the MMP inhibitor doxycycline.
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