title: Gender dimorphism in neutrophil priming and activation following trauma-hemorrhagic shock.
abstract: Although gender influences T-cell, macrophage and organ functions following trauma-hemorrhage and resuscitation (T-H), it remains unknown whether it also influences polymorphonuclear cell (PMN) activity under such conditions. To study this, proestrus female and male Sprague-Dawley rats underwent trauma-hemorrhage followed by fluid resuscitation. Circulating PMNs were assessed for superoxide (O2-) and elastase production and tissues were analyzed for myeloperoxidase (MPO) activity and TBARS (thiobarbituric acid reactive substances) as a marker of oxidative injury, at 2 and 24 h after resuscitation. PMA stimulated O2- production was not influenced by T-H or gender. In contrast, fMLP-stimulated O2- and LPS-stimulated elastase release by PMNs from male T-H rats was greater than that of females. A significant MPO activity and TBARS in tissues of both male and female rats was induced; however, MPO activity and TBARS levels were higher in males following T-H. Levels of the chemokine CINC-1 were elevated in the lungs of male, but not of proestrus females after T-H. Thus, decreased PMN priming and activation in proestrus females, compared to males, occurs following T-H resulting in decreased cellular injury and organ damage that is likely to contribute to improved outcome under those conditions.
authors.affiliation: Center for Surgical Research and Department of Surgery, University of Alabama at Birmingham, Birmingham, AL 35294, USA.
authors.forename: Balazs
authors.initials: B
authors.lastname: Toth
authors.forename: Martin G
authors.initials: MG
authors.lastname: Schwacha
authors.forename: Joachim F
authors.initials: JF
authors.lastname: Kuebler
authors.forename: Kirby I
authors.initials: KI
authors.lastname: Bland
authors.forename: Ping
authors.initials: P
authors.lastname: Wang
authors.forename: Irshad H
authors.initials: IH
authors.lastname: Chaudrya
mesh_terms: D000818:Animals; D019743:Chemokines, CXC / Q000032:analysis; D002634:Chemotaxis, Leukocyte / Q000187:drug effects; D005260:Female; D008070:Lipopolysaccharides / Q000494:pharmacology; D008168:Lung / Q000201:enzymology / Q000378:metabolism; D008297:Male; D009240:N-Formylmethionine Leucyl-Phenylalanine / Q000031:analogs & derivatives* / Q000494:pharmacology; D018375:Neutrophil Activation; D009504:Neutrophils / Q000276:immunology* / Q000378:metabolism; D010196:Pancreatic Elastase / Q000187:drug effects / Q000378:metabolism; D009195:Peroxidase / Q000378:metabolism; D051381:Rats; D017207:Rats, Sprague-Dawley; D012151:Resuscitation; D012727:Sex Characteristics; D012771:Shock, Hemorrhagic / Q000209:etiology / Q000276:immunology*; D013481:Superoxides / Q000378:metabolism; D017392:Thiobarbituric Acid Reactive Substances / Q000032:analysis; D014947:Wounds and Injuries / Q000150:complications*
chemical_list: D019743:Chemokines, CXC; D008070:Lipopolysaccharides; D017392:Thiobarbituric Acid Reactive Substances; D013481:Superoxides; D009240:N-Formylmethionine Leucyl-Phenylalanine; C042932:formylmethionyl-leucyl-phenylalanine methyl ester; D009195:Peroxidase; D010196:Pancreatic Elastase