Ila1, J Saarnio2, V Koivukangas2, H Syrj ?, T Karttunen4, Y Soini4, T Ala-Kokko1 1Department of Anesthesiology, 2Department of Surgery, 3Department of Infection Control and 4Department of Pathology, Oulu University Hospital, Oulu, Finland Critical Care 2007, 11(Suppl 2):P3 (doi: 10.1186/cc5163) Introduction It has been previously shown that the two forms of acute cholecystitis, acute acalculous cholecystitis (AAC) and acute calculous cholecystitis (ACC), have significantly different histopathological features suggesting that AAC is a TKI-258 lactate site manifestation of systemic critical illness whereas ACC is a local disease of the gallbladder. A balance between cell proliferation and cell death is essential for cell homeostasis. The purpose of this study was to compare the markers of apoptosis, cell proliferation, and expression of hypoxic-inducible factor alpha (HIF-1) in AAC, ACC and normal gallbladders. Methods The AAC group consisted of 30 patients who underwent open cholecystectomy due to acute PubMed ID:http://www.ncbi.nlm.nih.gov/pubmed/20799856 acalculous cholecystitis during their ICU stay. The ACC group consisted of 21 hospitalized patients who underwent cholecystectomy due to acute calculous cholecystitis. The control group consisted of nine samples taken from normal gallbladders extirpated during pancreatic tumor surgery. The immunohistochemical analysis was done according to the manufacturer’s recommendations and they consisted of Ki-67 (proliferation), M30 (apoptosis) and HIF-1 antibodies. Cell proliferation and degree of apoptosis were expressed as the percentage of positive cells. HIF-1 expression was expressed as absent or weak (Score 1) or strong (Score 2). Results Apoptosis (median, 25th, 75th percentiles) was significantly increased in AAC 1.3 (1.0 , 3.3 ), P = 0.001 and ACC 0.93 (0.40 , 3.25 ), P = 0.011 compared with controls 0.32 (0.20 , 0.40 ). Proliferation rate was also significantly increased in AACP2 Cytoprotective and anti-inflammatory effects of hydrogen sulfide in macrophages and miceC Szabo, L Kiss, E Pankotai University of Medicine and Dentistry of New Jersey, Newark, NJ, USA Critical Care 2007, 11(Suppl 2):P2 (doi: 10.1186/cc5162) The aim of the current study was to test potential cytoprotective and anti-inflammatory effects of the novel biological mediator hydrogen sulfide in murine models. Murine J774 macrophages were grown in culture and exposed to cytotoxic concentrations of nitrosoglutathione, or peroxynitrite (a reactive species formed from the reaction of nitric oxide and superoxide). Pretreatment of theSCritical CareMarch 2007 Vol 11 Suppl27th International Symposium on Intensive Care and Emergency Medicine8.0 (4.0 , 17.0 ), P < 0.001 and ACC 14 (7.5 , 26.5 ), P = 0.001 compared with controls 1.0 (1.0 , 3.0 ). Strong HIF1 staining was observed in 100 of ACC, in 57 of AAC and in 44 of control specimens (P < 0.001). Strong HIF-1 expression was associated with increased cell proliferation (P = 0.002). Conclusions Cell proliferation and apoptosis were increased in AAC and ACC. The expression of hypoxic-inducible factor was, however, stronger in ACC compared with AAC.Figure 1 (abstract P5)P4 Effect of prostaglandin E2 on ATP-induced Ca2+ responses in human THP-1 monocytic cellsM Goto1, M Murakawa1, J Kimura1, I Matsuoka2 1Fukushima Medical University, Fukusima, Japan; 2Takasaki University of Health and Welfare, Gunma, Japan Critical Care 2007, 11(Suppl 2):P4 (doi: 10.1186/cc5164) Introduction To clarify the relation between ATP and prostaglandin E2 (PGE2) in the.
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