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. 2010 Mar;6(1):1–7.

Table 1.

Study protocol

Animal Study parameters Pre-Monensin Dose number
Study duration Cause of study termination
1 2 3 4

1 Dose (mg/kg) - 25 20 40 60 - Elective sacrifice
PMD (days) - 0 13 24 35 65
Monensin [ng/mL] - - - - - -
Plasma renin activity [μg/l/hr] 0.9 1.3 0.4 0.6 0.5 -
CK-MB [ng/ml] - - - - 0.6 -
Troponin T [ng/ml] <0.01 <0.01 <0.01 <0.01 <0.01 -
2 Dose (mg/kg) - 80 - - - - Sudden death from cardiac arrhythmia
PMD (days) - 0 - - - 6
Monensin [ng/mL] - 7.21 - - - -
3 Dose (mg/kg) - 60 80 - - - Elective sacrifice
PMD (days) - 0 12 - - 34
Monensin [ng/mL] - N/A 5.05 - - -
Plasma renin activity [μg/l/hr] 0.7 0.7 1.0 - - -
CK-MB [ng/ml] 1.3 1.1 1.0 - - -
Troponin T [ng/ml] <0.01 <0.01 <0.01 - - -
4 Dose (mg/kg) - 60 - - - - Severe refractory heart failure
PMD (days) - 0 - - - 4
Monensin [ng/mL] - 6.75 - - - -
5 Dose (mg/kg) - 40 - - - - Severe refractory heart failure
PMD (days) - 0 - - - 5
Monensin [ng/mL] - 23.0 - - - -

Monensin [ng/mL], blood concentration 1 d after each dose; PMD, post first-monensin day; CK-MB, creatine kinase-myocardial band. Plasma renin activity, CK-MB, and troponin T levels were measured pre-monensin and 7 days after each dose administration.