title: Acetyl salicylic acid protected against heat stress damage in chicken myocardial cells and may associate with induced Hsp27 expression.
abstract: We investigated whether acetyl salicylic acid (ASA) protects chicken myocardial cells from heat stress-mediated damage in vivo and whether the induction of Hsp27 expression is connected with this function. Pathological changes, damage-related enzyme levels, and Hsp27 expression were studied in chickens following heat stress (40 ± 1 °C for 0, 1, 2, 3, 5, 7, 10, 15, or 24 h, respectively) with or without ASA administration (1 mg/kg BW, 2 h prior). Appearance of pathological lesions such as degenerations and karyopyknosis as well as the myocardial damage-related enzyme activation indicated that heat stress causes considerable injury to the myocardial cells in vivo. Myocardial cell injury was most serious in chickens exposed to heat stress without prior ASA administration; meanwhile, ASA pretreatment acted protective function against high temperature-induced injury. Hsp27 expression was induced under all experimental conditions but was one-fold higher in the ASA-pretreated animals (0.3138 ± 0.0340 ng/mL) than in untreated animals (0.1437 ± 0.0476 ng/mL) 1 h after heat stress exposure, and such an increase was sustained over the length of the experiment. Our findings indicate that pretreatment with ASA protects chicken myocardial cells from acute heat stress in vivo with almost no obvious side effects, and this protection may involve an enhancement of Hsp27 expression. However, the detailed mechanisms underlying this effect require further investigation.
authors.affiliation: College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, China.
authors.forename: Di
authors.initials: D
authors.lastname: Wu
authors.forename: Jiao
authors.initials: J
authors.lastname: Xu
authors.forename: Erbao
authors.initials: E
authors.lastname: Song
authors.forename: Shu
authors.initials: S
authors.lastname: Tang
authors.forename: Xiaohui
authors.initials: X
authors.lastname: Zhang
authors.forename: N
authors.initials: N
authors.lastname: Kemper
authors.forename: J
authors.initials: J
authors.lastname: Hartung
authors.forename: Endong
authors.initials: E
authors.lastname: Bao
mesh_terms: D000818:Animals; D001241:Aspirin / Q000494:pharmacology*; D002645:Chickens; D052279:Creatine Kinase, MB Form / Q000097:blood; D055551:HSP27 Heat-Shock Proteins / Q000032:analysis / Q000378:metabolism*; D006321:Heart / Q000187:drug effects*; D018869:Heat-Shock Response / Q000187:drug effects*; D007150:Immunohistochemistry; D007770:L-Lactate Dehydrogenase / Q000097:blood; D009206:Myocardium / Q000378:metabolism* / Q000473:pathology; D013696:Temperature
chemical_list: D055551:HSP27 Heat-Shock Proteins; D007770:L-Lactate Dehydrogenase; D052279:Creatine Kinase, MB Form; D001241:Aspirin