title: Pretreatment before ischemia induction with polymerized human placenta hemoglobin (PolyPHb) attenuates ischemia/reperfusion injury-induced myocardial apoptosis.
abstract: This study was designed to investigate the influence of polymerized human placenta hemoglobin (PolyPHb) pretreatment on ischemia/reperfusion (I/R) injury-induced myocardial apoptosis. Isolated Sprague-Dawley rat hearts were perfused by Langendorff model. After basal perfusion, hearts were arrested by St.Thomas' solution (STS) with (Pre-HBOC group) or without PolyPHb (STS group), then subjected to I/R injury. Our results showed that PolyPHb pretreatment greatly reduced the TUNEL-positive myocardial cells and decreased the caspase-3 activity and cleavage, which was further confirmed by the linear regression analysis. Therefore, PolyPHb pretreatment was beneficial to attenuation of myocardial apoptosis and provided protection to the heart against I/R injury.
authors.affiliation: Laboratory of Anesthesiology and Critical Care Medicine, West China Hospital, Sichuan University, Chengdu, China.
authors.forename: Wei
authors.initials: W
authors.lastname: Wu
authors.forename: Tao
authors.initials: T
authors.lastname: Li
authors.forename: Jin
authors.initials: J
authors.lastname: Liu
authors.forename: Chengmin
authors.initials: C
authors.lastname: Yang
mesh_terms: D000818:Animals; D017209:Apoptosis / Q000187:drug effects*; D053148:Caspase 3 / Q000378:metabolism; D061945:Caspase Inhibitors; D005260:Female; D006321:Heart / Q000187:drug effects; D006454:Hemoglobins / Q000737:chemistry* / Q000494:pharmacology*; D006801:Humans; D066298:In Vitro Techniques; D008297:Male; D009206:Myocardium / Q000201:enzymology / Q000473:pathology*; D010920:Placenta; D011247:Pregnancy; D055503:Protein Multimerization; D020836:Protein Structure, Quaternary; D051381:Rats; D017207:Rats, Sprague-Dawley; D015427:Reperfusion Injury / Q000201:enzymology / Q000473:pathology*
chemical_list: D061945:Caspase Inhibitors; D006454:Hemoglobins; D053148:Caspase 3