Abstract:
OBJECTIVE:To investigate the mechanism by which methylprednisolone protects the liver from hypoxia-induced injury. DESIGN:Prospective control study using the isolated rat liver. SETTING:Animal research facility. SUBJECTS:Male, fasted, pathogen-free Sprague-Dawley rats. INTERVENTIONS:Low-flow hypoxia was produced by reducing afferent perfusate pressure from 10 to 2.5 cm H(2)O; isolated livers were portally perfused for 2 hrs. MEASUREMENTS AND MAIN RESULTS:We measured mitochondrial membrane potential and hydrogen peroxide production by imaging rhodamine 123 and 2'-7'-dichlorofluorescein fluorescence, respectively. Leakage of mitochondrial enzymes was also monitored by assaying mitochondrial aspartate aminotransferase activity in the outflow perfusate, and the radical-scavenging effect of methylprednisolone was assessed by measuring luminol-dependent hydrogen peroxide chemiluminescence. Apoptosis in liver cells was determined by using terminal deoxynucleotidyl transferase-mediated dUTP-digoxigenin nick-end labeling. Rhodamine 123 fluorescence was significantly diminished in the hypoxic liver, especially in the region of the terminal hepatic venules, which is indicative of membrane depolarization in the mitochondria in those areas. Hypoxia-induced mitochondrial dysfunction was indicated by leakage of aspartate aminotransferase into the outflow perfusate, and increased 2'-7'-dichlorofluorescein fluorescence indicated increased hydrogen peroxide levels, particularly in the midzone. Pretreatment with 30, 10, or 3 mg/kg of methylprednisolone inhibited the hypoxia-induced mitochondrial membrane depolarization and enzyme leakage, although hydrogen peroxide levels and apoptosis in sinusoidal endothelial cells were unaffected. CONCLUSIONS:Methylprednisolone does not protect the liver from hypoxia-induced injury by suppressing hydrogen peroxide production. Instead, the beneficial effect of methylprednisolone seems to be related to its ability to protect against mitochondrial membrane depolarization under hypoxic conditions.
journal_name
Crit Care Medjournal_title
Critical care medicineauthors
Motoyama S,Saito S,Minamiya Y,Saito R,Nakamura M,Okuyama M,Imano H,Ogawa Jdoi
10.1097/01.CCM.0000066176.49774.CCsubject
Has Abstractpub_date
2003-05-01 00:00:00pages
1468-74issue
5eissn
0090-3493issn
1530-0293journal_volume
31pub_type
杂志文章abstract::The ability of ACTH-(1-24) to prolong survival and to extend the deadline for effective blood reinfusion has been studied in a model of lethal hypovolemic shock in the rat. Anesthetized rats were bled to a mean arterial pressure of 18 to 25 mm Hg and then subjected to one of the following iv treatments: a) saline; b) ...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/00003246-199008000-00014
更新日期:1990-08-01 00:00:00
abstract:OBJECTIVES:To determine whether glucose utilization and metabolic substrate (glucose and fat) oxidation could be manipulated in patients with secondary multiple organ dysfunction syndrome. DESIGN:Prospective study. SETTING:Intensive care units (ICU) of two university hospitals. PATIENTS:Eight adults free of hepatic ...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/00003246-199501000-00014
更新日期:1995-01-01 00:00:00
abstract:OBJECTIVE:To determine the feasibility of utilizing a scintigraphic technique to differentiate patients with adult respiratory distress syndrome due to sepsis syndrome from control volunteers and patients with congestive heart failure. Gamma scintigraphy was compared with chest roentgenograms to predict mortality rate ...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/00003246-199201000-00012
更新日期:1992-01-01 00:00:00
abstract::The authors placed Swan-Ganz catheters in 11 preterm and 2 term infants with severe cardiopulmonary distress. The infants ranged in weight from 1100-4000 g. The procedure was performed in the neonatal ICU by jugular venous cutdown. Intracardiac pressures and oxygen saturations were measured in each chamber entered. Th...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/00003246-197908000-00002
更新日期:1979-08-01 00:00:00
abstract:OBJECTIVE:To determine the accuracy of a technique using capnography to prevent inadvertent placement of small-bore feeding tubes and Salem sump tubes into the lungs. SETTING:Twelve-bed medical intensive care unit (MICU) in a 557-bed teaching hospital. PATIENTS:A total of 25 ventilated adult MICU patients were studie...
journal_title:Critical care medicine
pub_type: 临床试验,杂志文章
doi:10.1097/00003246-200105000-00004
更新日期:2001-05-01 00:00:00
abstract:OBJECTIVE:Surgical trauma results in diffuse sympathoadrenal activation which is thought to contribute to perioperative cardiovascular complications in high-risk patients. Regional anesthetic and analgesic techniques can attenuate this "stress response" and reduce the occurrence rate of adverse perioperative events; ho...
journal_title:Critical care medicine
pub_type: 临床试验,杂志文章
doi:10.1097/00003246-199707000-00015
更新日期:1997-07-01 00:00:00
abstract:OBJECTIVES:To test the hypothesis that after cecal ligation and puncture in the rat, there is increased expression of the tumor necrosis factor (TNF)/interleukin-1-dependent, acute-phase reactant alpha 1-acid glycoprotein in the liver, and that this change correlates temporally with increased abundance of TNF-alpha in ...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/00003246-199612000-00004
更新日期:1996-12-01 00:00:00
abstract:OBJECTIVE:We studied the in-hospital course, long-term prognosis, and functional status of elderly patients with life-threatening cardiogenic pulmonary edema requiring mechanical ventilation. DESIGN:Semiprospective evaluation. SETTING:Twelve intensive care units and one emergency prehospital medical department in uni...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/00003246-200104000-00042
更新日期:2001-04-01 00:00:00
abstract:OBJECTIVE:Delirium is common in mechanically ventilated patients in the ICU and associated with short- and long-term morbidity and mortality. The use of systemic corticosteroids is also common in the ICU. Outside the ICU setting, corticosteroids are a recognized risk factor for delirium, but their relationship with del...
journal_title:Critical care medicine
pub_type: 临床试验,杂志文章,多中心研究
doi:10.1097/CCM.0000000000000247
更新日期:2014-06-01 00:00:00
abstract:OBJECTIVE:To compare three devices that measure core body temperature at the bedside in ICU patients. DESIGN:Prospective, consecutive sample. SETTING:Voluntary community teaching hospital. PATIENTS:Fifteen patients, 78 +/- 6 (SD) yrs of age, admitted to the medical ICU over a 5-month period who had pulmonary artery ...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/00003246-199106000-00015
更新日期:1991-06-01 00:00:00
abstract:OBJECTIVE:To explore the hypothesis that beta-1 adrenoreceptor blockade may be protective through the attenuation of sympathetic hyperactivity and catecholaminergic inflammatory effects on cardiac and hepatic function. DESIGN:Prospective, randomized, controlled study. SETTING:Animal laboratory in a university medical...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/CCM.0b013e3181c03dfa
更新日期:2010-02-01 00:00:00
abstract:OBJECTIVE:The objective of this study was to test the ability of myoglobin removal of a novel, high-permeability polysulphone dialyzer in acute kidney injury as a result of rhabdomyolysis. SETTING:Intensive care unit of a tertiary care hospital. PATIENTS:Six patients (one female; aged 24, 36, 41, 55, 63, and 65 yrs) ...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/CCM.0b013e3181feb7f0
更新日期:2011-01-01 00:00:00
abstract:OBJECTIVE:To study the effects of high-dose epinephrine, compared with standard-dose epinephrine, on the dynamics of superficial cortical cerebral blood flow as well as global cerebral oxygenation during experimental cardiopulmonary resuscitation. We hypothesized that high-dose epinephrine might be unable to improve ce...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/00003246-200005000-00028
更新日期:2000-05-01 00:00:00
abstract::The Pediatric Risk of Mortality (PRISM) score was developed from the Physiologic Stability Index (PSI) to reduce the number of physiologic variables required for pediatric ICU (PICU) mortality risk assessment and to obtain an objective weighting of the remaining variables. Univariate and multivariate statistical techn...
journal_title:Critical care medicine
pub_type: 临床试验,杂志文章,多中心研究
doi:10.1097/00003246-198811000-00006
更新日期:1988-11-01 00:00:00
abstract:OBJECTIVE:The aim of this study was to investigate whether hyperglycemia enhances the systemic inflammatory response and oxidative stress induced by endotoxin. DESIGN:Laboratory investigation. SETTING:University medical school. SUBJECTS:Forty-one male Sprague-Dawley rats. INTERVENTIONS:A hyperglycemic condition was...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/01.ccm.0000163225.88827.63
更新日期:2005-05-01 00:00:00
abstract:OBJECTIVE:Procalcitonin, the precursor peptide of calcitonin, has been shown to be a serum marker of the severity and mortality of several systemic inflammatory response syndromes. This study addressed the correlation of serum procalcitonin with the course of classic (nonexertional) heatstroke. DESIGN:Serum samples we...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/00003246-199708000-00024
更新日期:1997-08-01 00:00:00
abstract:OBJECTIVES:Racial/ethnic differences in palliative care resource use after stroke have been recognized, but it is unclear whether patient or hospital characteristics drive this disparity. We sought to determine whether palliative care use after intracerebral hemorrhage and ischemic stroke differs between hospitals serv...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/CCM.0000000000002762
更新日期:2017-12-01 00:00:00
abstract::Oxygen availability during cardiopulmonary bypass was assessed in 22 patients under hypothermic and relatively normothermic conditions. The patients were divided into two groups, 17 of whom received ACD blood and 5, CPD blood. The mean P50 for all patients fell from a preoperative value of 25.9 +/- 2.4 (SD) to 15.6 +/...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/00003246-197705000-00007
更新日期:1977-05-01 00:00:00
abstract::Because determining cardiac output is difficult in premature infants, little is known about the hemodynamic effects of PEEP in this age group. We used pulsed-wave Doppler echocardiography to assess the hemodynamic effects of PEEP increments in ten premature infants with respiratory distress syndrome. At a PEEP of 4 cm...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/00003246-198707000-00007
更新日期:1987-07-01 00:00:00
abstract:OBJECTIVES:The purposes of this report are to a) describe the University of Michigan experience with venoarterial or venovenous extracorporeal life support for severe pediatric pulmonary rescue therapy, and b) examine survivors and nonsurvivors for differences that might be useful for examination in future, prospective...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/00003246-199208000-00008
更新日期:1992-08-01 00:00:00
abstract::The records of 101 drowning or near-drowning victims admitted to Children's Hospital of Los Angeles (CHLA) between January 1975 and June 1978 were reviewed. The admission Glasgow coma score could be assigned retrospectively to 94 patients. A low score (less than 5) predicted a high risk group of patients with 80% mort...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:
更新日期:1981-07-01 00:00:00
abstract:OBJECTIVE:To determine the cost savings of replacing intravenous midazolam with enterally administered lorazepam in mechanically ventilated children who require long-term continuous sedation. DESIGN:Retrospective review of patients treated according to a preestablished pediatric intensive care unit (ICU) sedation prot...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/00003246-199902000-00052
更新日期:1999-02-01 00:00:00
abstract:OBJECTIVE:Failure to detect clinical deterioration in the hospital is common and associated with poor patient outcomes and increased healthcare costs. Our objective was to evaluate the feasibility and accuracy of real-time risk stratification using the electronic Cardiac Arrest Risk Triage score, an electronic health r...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/CCM.0000000000001716
更新日期:2016-08-01 00:00:00
abstract:OBJECTIVE:To determine a) if the admission osmole gap, the difference between osmolality and osmolarity, is the same in the neurologic-neurosurgical intensive care unit (NNICU) population as in healthy controls; b) which of 11 osmole gap formulas, or osmolality, correlates best with mannitol serum concentrations; c) wh...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/01.ccm.0000120057.04528.60
更新日期:2004-04-01 00:00:00
abstract:OBJECTIVE:A hallmark of amniotic fluid embolism is the induction of coagulation defects. Little is known about the nature of these defects or the causative agent or agents. The purpose of this study was to assess the effects of meconium containing (native) meconium-amniotic-fluid infusion (MAFI) and meconium-free (cent...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/00003246-199902000-00042
更新日期:1999-02-01 00:00:00
abstract:OBJECTIVE:To evaluate diagnostic and prognostic values of C-reactive protein (CRP) dosage in critically ill patients. DESIGN:Prospective, observational study. SETTING:Medical intensive care unit (ICU) in a university hospital. PATIENTS:A consecutive series of 74 patients admitted to the ICU. INTERVENTION:CRP measur...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/00003246-200203000-00006
更新日期:2002-03-01 00:00:00
abstract::Pulmonary artery wedge pressure (PAWP) will only reflect left atrial pressure (LAP) if continuity of fluid exists from the catheter tip to the left atrium. Either increased airway pressure or decreased hydrostatic pressure may lead to discontinuity of the fluid column and midinterpretation of PAWP. Simultaneous measur...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/00003246-197801000-00009
更新日期:1978-01-01 00:00:00
abstract:OBJECTIVES:Thrombotic microangiopathy syndromes are a heterogeneous group of severe diseases that often require ICU admission. Prompt initiation of targeted therapies is required for atypical hemolytic uremic syndrome and thrombotic thrombocytopenic purpura, whereas there is no specific consensus therapy for Shiga toxi...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/CCM.0000000000003292
更新日期:2018-09-01 00:00:00
abstract:OBJECTIVES:Extracellular mitochondrial DNA and N-formyl peptides released following tissue damage may contribute to systemic inflammation through stimulation of the innate immune system. In this review, we evaluate existing in vivo human data regarding a role for mitochondrial DNA and N-formyl peptides in producing sys...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/CCM.0000000000003381
更新日期:2018-12-01 00:00:00
abstract::Recent strides in computational biology and high-throughput technologies have generated considerable interest in understanding complex biological systems. The application of these technologies to critical illness and injury offers the potential to define adaptive and maladaptive programs of gene expression induced by ...
journal_title:Critical care medicine
pub_type: 杂志文章,评审
doi:10.1097/ccm.0b013e318186a720
更新日期:2008-10-01 00:00:00