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Objective:To observe whether intraoperative application of Dexmedetomidine combined with Ulinastatin has protective effect on postoperative pulmonary function in elderly patients with acute abdomen.Methods:80 cases of elderly patients with acute abdomen were divided into 4 groups randomly:Control group (group C);Dexmedetomidine group (group D);Ulinastatin group (group U) and Dexmedetomidine combined with Ulinastatin group (group D+U),20 cases in each group.In group D,before induction of anesthesia,a loading dose of Dexmedetomidine 1.0 μ g/kg was infused over 10 min,followed by continuous infusion of Dexmedetomidine at a rate of 0.5 μ g/ (kg·h) until the last 0.5 h before the end of surgery.Group U received Ulinastatin 10000 U/kg after induction of anesthesia.The patients in group D+U group were treated with the above two methods;and the patients in group C were given normal saline as control.General anesthesia was used in each group.Arterial blood gas analysis,oxygenation index,serum TNF-α and IL-8 levels were observed in all patients in preoperative 1 d and postoperative 1,3 and 5 d.All patients were back to ICU with intubation after operation.The duration of intubation,ICU treatment days,total hospitalization period and postoperative pulmonary complications were recorded.Results:For the oxygenation index,there was no significant difference between each group at TO (P＞0.05).But at T1,T2 or T3,the oxygenation index in group D+U is better than group D,group U or group C (P＜0.05).The comparison of serum TNF-α and IL-8 concentration in each group was almost the same as the oxygenation index.As for Duration of intubation,ICU treatment days,total hospitalization period,those in Group D+U are shorter than in other three groups (P＜0.05).In the incidence of postoperative pulmonary complications (atelectasis,pulmonary infection,etc),group D+U (18％) was significantly lower than C group(26％),group D(32％) and U group(38％,P＜0.05).Conclusion:The combination of dexmedetomidine and ulinastatin in elderly patients with acute abdomen can reduce the perioperative inflammatory response and improve the postoperative lung function.
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Objective To study the expression patterns of Th1 and Th2 cytokine genes in childhood acute idiopathic thrombocytopenic purpura(ITP) and its clinical value.Methods Peripheral blood samples from 30 patients with acute ITP before and after treatment (ITP group) and those from 20 normal healthy subjects (healthy control group) were collected (healthy control group),and reverse transcriptases polymerase chain reaction was performed to determine the mRNA expressions of Th1 and Th2 cytokine genes before and after treatment,which were compared with those of the health controls.Results The positive rate of expression levels of Th1 cytokine genes in samples from ITP patients (3.3％,3.3％) were significantly lower than those from healthy control group (all P ＜ 0.05) and increased to normal level after treatment(16.7％,23.3％).In contrast,Th2 cytokine genes (IL-4,IL-6,IL-10)in the samples from the ITP patients(33.3％,43.3％,40.0％) were significantly higher than those from the healthy control group (all P ＜0.05) and decreased after treatment(10.0％,23.3％,20.0％).Conclusions Such data indicate that ITP is a Th2 cell predominant autoimmune disease,and the abnormal immunity due to Th1/Th2 shift is significant in the pathogenesis of ITP.
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<p><b>BACKGROUND</b>Heme oxygenase-1 (HO-1) can be induced by inflammatory cytokines, oxidation, ischemia, hypoxia, and endotoxins. As a "graft survival protective gene," HO-1 is a hot spot in organ transplantation research. However, the role of HO-1 gene expression in the function of human colon adenocarcinoma cell line (Caco-2) cells has not been reported previously.</p><p><b>METHODS</b>The role of HO-1 in the proliferation and migration of Caco-2 cells was analyzed using a stable HO-1 expression plasmid. We constructed a recombinant adeno-associated virus plasmid containing the HO-1 gene, heme oxygenase 1 (HMOX1), which was transfected into Caco-2 intestinal cells. We identified a number of target genes by global microarray analysis combined with real-time polymerase chain reaction (PCR) and chromatin immunoprecipitation assay.</p><p><b>RESULTS</b>Our results showed that significant HO-1 upregulation was demonstrated in the Caco-2 cells after HO-1 transfection. Restoration of HO-1 expression promoted proliferation and invasion in vitro. The CTNND1 gene, a member of the armadillo protein family, was identified as a direct HO-1 target gene.</p><p><b>CONCLUSION</b>Overexpression of HO-1 promotes Caco-2 cell proliferation and migration by targeting the CTNND1 gene.</p>
Subject(s)
Humans , Caco-2 Cells , Catenins , Genetics , Cell Movement , Cell Proliferation , Gene Expression Regulation, Neoplastic , Heme Oxygenase-1 , Genetics , Physiology , Real-Time Polymerase Chain ReactionABSTRACT
<p><b>OBJECTIVE</b>To study the regulation of hypoxia inducible factor-1alpha (HIF-1alpha) on osteoblast function in postmenopausal osteoporosis.</p><p><b>METHODS</b>From October 2004 to May 2006, Cre-Loxp recombinase was used to create mice which the HIF-1alpha gene in osteoblasts was conditional knock-out, 24 female wild-type (WT) mice and 24 female conditional knock-out (CKO) mice of 3 months old were operated on ovariotomy. At 0,4,8 weeks after operation, bone histomorphometry parameters were measured with computer image analysis in HE stain sections and in tetracycline bone double labeling fluorescence sections; Bone density and the trabecular bone architecture parameters were measured by Micro-CT; The mRNA expression of vascular endothelial growth factors (VEGF), RunX2, OC, ALP were detected with quantitative RT-PCR; The protein expression of VEGF and RunX2 were detected with Western-blotting.</p><p><b>RESULTS</b>In CKO mice, the trabecular number, volume, thickness, bone density, mineral apposition rate (MAR), the expression of VEGF, RunX2, OC, ALP on mRNA level and the expression of VEGF, RunX2 on protein level decreased significantly compared with WT mice especially in 8 weeks after operation.</p><p><b>CONCLUSIONS</b>The bone formation ability of osteoblasts in CKO mice was reduced compared with WT mice after ovariotomy. HIF-1alpha can regulate the bone formation ability of osteoblasts in postmenopausal osteoporosis.</p>
Subject(s)
Animals , Female , Humans , Mice , Blotting, Western , Core Binding Factor Alpha 1 Subunit , Genetics , Metabolism , Disease Models, Animal , Femur , Metabolism , Pathology , Hypoxia-Inducible Factor 1, alpha Subunit , Genetics , Physiology , Mice, Inbred C57BL , Mice, Knockout , Osteoblasts , Metabolism , Physiology , Osteoporosis, Postmenopausal , Genetics , Metabolism , Ovariectomy , Random Allocation , Reverse Transcriptase Polymerase Chain Reaction , Vascular Endothelial Growth Factor A , Genetics , MetabolismABSTRACT
Objective To explore the expression and regulatory mechanism of hypoxia inducible factor-1?(HIF-1?)during fracture healing. Methods Mouse models of tibia fracture healing were established,and callus samples were collected 1,3,7,14,21 and 28 days after fracture.The development of callus and new bone formation were evaluated with roentgenology,Micro-CT and tetracycline double labeling method,and the expression of HIF-1?,vascular endothelial growth factor(VEGF),Runx2 and ALP in callus were detected with RT-PCR,Western blotting and immunohistochemistry.The relationship between HIF-1? and fracture healing was analysed. Results The expression of HIF-1? was detected in cells in the fracture sites as well as in evolved osteoblasts,chondrocytes and osteocytes in early callus under hypoxia.The highest expression rate of HIF-1? achieved on the 7th day after fracture,lasted for about 7 days,then decreased gradually,and returned to intact level on the 28th day after fracture.The expression tendency of VEGF resembled that of HIF-1?.Bone formation activity was more active in early callus,and the callus volume peaked on the 14th day after fracture and decreased gradually.The mineralization of callus mainly took place in the late healing period(14th to 28th day after fracture).Conclusion Cells involved in fracture healing are hypoxia-responsive cells,which express HIF-1?.HIF-1? can regulate cell state and function,and can promote angiogenesis so as to play a crucial role in fracture healing.