Structure-activity studies on the protection of Trimetazidine derivatives modified with nitroxides and their precursors from myocardial ischemia-reperfusion injury.
Trimetazidine, the known anti-anginal and anti-ischemic drug, was modified by pyrroline and tetrahydropyridine nitroxides and their hydroxylamine and sterically hindered secondary amine precursors. The synthesized new compounds proved to be better superoxide scavenger molecules compared to the parent Trimetazidine in an in vitro experiment. This reactive oxygen species (ROS) scavenging activity was further supported by ischemia/reperfusion (I/R) studies on Langendorff-perfused rat hearts pretreated with Trimetazidine and with the modified Trimetazidine derivatives before ischemia. Two of the investigated compounds, containing 2,2,5,5-tetramethyl-2,5-dihydro-1H-pyrrole and 4-phenyl-2,2,5,5-tetramethyl-2,5-dihydro-1H-pyrrole substituents on the piperazine ring, provided significant protection from the cardiac dysfunction caused by I/R. The protective effect could be attributed to the combined anti-ischemic and antioxidant effects.
Kálai
Tamás
T
Institute of Organic and Medicinal Chemistry, University of Pécs, Hungary.
Khan
Mahmood
M
Balog
Mária
M
Kutala
Vijay Kumar
VK
Kuppusamy
Periannan
P
Hideg
Kálmán
K
D000818:Animals; D000975:Antioxidants / Q000737:chemistry / Q000494:pharmacology*; D015428:Myocardial Reperfusion Injury / Q000150:complications / Q000473:pathology* / Q000517:prevention & control; D009589:Nitrogen Oxides / Q000737:chemistry*; D000077489:Piperazine; D010879:Piperazines / Q000737:chemistry; D051381:Rats; D017207:Rats, Sprague-Dawley; D017382:Reactive Oxygen Species / Q000737:chemistry / Q000378:metabolism; D013329:Structure-Activity Relationship; D014292:Trimetazidine / Q000031:analogs & derivatives / Q000494:pharmacology*; D014665:Vasodilator Agents / Q000737:chemistry / Q000494:pharmacology*
D000975:Antioxidants; D009589:Nitrogen Oxides; D010879:Piperazines; D017382:Reactive Oxygen Species; D014665:Vasodilator Agents; D000077489:Piperazine; D014292:Trimetazidine