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Objective:To observe the application effect of respiratory stepwise management in patients with septic shock combined with acute lung injury (ALI).Methods:100 patients with septic shock combined with ALI were selected as the research objects in Haikou Hospital Affiliated to Xiangya Medical College of Central South University from January 2018 to June 2020. Fifty patients were given endotracheal intubation or invasive ventilation on the basis of conventional treatment (conventional treatment group). According to the respiratory situation and blood gas, 50 patients were given systematic respiratory support step-by-step treatment according to the principle of simple to complex, and appropriate and scientific respiratory support was given according to the sequence from unarmed to mechanical (respiratory stepwise management group). The differences of cardiac index (CI), central venous pressure (CVP), mean arterial pressure (MAP), extravascular lung water index (EVLWI), arterial partial pressure of carbon dioxide (PaCO 2), arterial partial pressure of oxygen (PaO 2), oxygenation index (PaO 2/FiO 2) before and after treatment were compared between the two groups, the therapeutic effects of the two groups were evaluated, and the resuscitation effect, postoperative complications rate, tracheotomy rate, utilization rate of invasive ventilator of the two groups were recorded. Results:After treatment, CI, CVP, EVLWI, PaO 2, PaO 2/FiO 2 levels of the two groups were significantly higher than before treatment, MAP and PaCO 2 levels were significantly lower than before treatment; MAP and PaCO 2 levels after treatment of the respiratory stepwise management group were significantly lower than those of the conventional treatment group [MAP (mmHg, 1 mmHg = 0.133 kPa): 68.2±7.0 vs. 74.4±6.8, PaCO 2 (mmHg): 37.82±4.05 vs. 41.76±4.59], the levels of EVLWI, PaO 2 and PaO 2/FiO 2 in the respiratory stepwise management group were significantly higher than those in the conventional treatment group [EVLWI (mL/kg): 15.34±3.03 vs. 13.64±3.32, PaO 2 (mmHg): 84.44±4.83 vs. 79.03±5.54, PaO 2/FiO 2 (mmHg): 452.42±51.32 vs. 431.73±50.03, all P < 0.05]. There was no significant difference in CI or CVP after treatment between respiratory stepwise management group and conventional treatment group [CI (mL·s -1·m -2): 70.01±21.67 vs. 66.68±18.34, CVP (mmHg): 11.1±3.2 vs. 12.3±3.2, both P > 0.05]. Compared with the conventional treatment group, the average recovery time of the respiratory stepwise management group was earlier (hours: 2.04±0.54 vs. 4.29±0.20, P < 0.05), the stable breathing time was shorter (hours: 3.07±0.22 vs. 5.36±0.35, P < 0.05), the total effective rate and the success rate of recovery were significantly improved [86.0% (43/50) vs. 60.0% (30/50), 94.0% (47/50) vs. 74.0% (37/50), both P < 0.05], the incidence of ventilator associated pneumonia (VAP) and airway complications were significantly reduced [14.0% (7/50) vs. 32.0% (16/50), 12.0% (6/50) vs. 40.0% (20/50), both P < 0.05], and the tracheotomy rate and the utilization rate of invasive ventilator were significantly reduced [8.0% (4/50) vs. 28.0% (14/50), 30.0% (15/50) vs. 60.0% (30/50), both P < 0.05]. Conclusion:Respiratory stepwise management can effectively improve the resuscitation effect of septic shock patients with ALI, improve cardiopulmonary function, blood gas index and the treatment efficiency, effectively reduce the incidence of iatrogenic trauma and complications.
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Objective The study explored the feasibility of PBL teaching approach and mini-CEX scores evaluation method in hematology probation teaching practice. Methods 54 medical students of eight-year program were selected in the study and they were in hematology department of Sun Yat-sen Memorial Hospital for clinical probation. The study compared PBL teaching approach with traditional training method, and used mini-CEX to evaluate the students' clinical competence. Results The performance of PBL teaching group is better than traditional teaching group in the aspect of inquiry skill, clinical diagnosis, therapy plan and humanistic care (P<0.05). There is no significant difference of basic knowledge, physical examination skill and clinical operational skills between these two groups. More than 85％of the students in PBL group are satisfied with the teacher in the aspect of participation, feedback, guidance, correction and assistance. Conclusion Through this teaching practice, the study provides new methods for improving the teaching of pre-internal clinical practice in hematology department.
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Objective Our preliminary study demonstrates that quercetin can inhibit the proliferation of HL-60 cells. This sudy aimed to find some drugs which could have synergistic effects with quercetin on apoptosis of HL-60 cells. Methods HL-60 cells were cultured with bortezomib at different concentrations (1, 2, 4, 8, 16, and 32μmol/L) alone or combined with quercetin at different concentrations for 48 h. HL-60 cells were cultured with lenalidomide at different concentrations (5, 10, 20, 40, 80, 160, and 320 μmol/L) alone or in combination with quercetin at different concentrations for 48 h. The CCK-8 assay was used to determine the effects on proliferation of HL-60 cells. Results Bortezomib significantly inhibited the proliferation of HL-60 cells (P 0.05). The results of cell viability of HL-60 cells treated by lenalidomide at higher concentrations (160 and 320μmol/L) were lower than those of the control group (P<0.05). IC50 of quercetin after cells treated by quercetin combined with bortezomib was not different from that treated by quercetin alone. Isobolographic analysis revealed the two drugs had no synergistic effect. Conclusions Bortezomib can inhibit the proliferation of HL-60 cells and it has a synergistic effect with quercetin on HL-60 cells. Lenalidomide has a weaker role in inhibition of the proliferation of HL-60 cells, and it has no synergistic effect with quercetin on HL-60 cells.
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Objective To investigate the effect of membrane-bound prostaglandin E2 synthase 1 (mPGES-1) inhibitor MK886 on cell cycle of the human acute myeloid leukemia HL-60/A cells.Methods Flow cytometry,Western blot and ELISA were used to measure the difference of cell cycle,expression of cyclin D1, mPGES-1 among HL-60/A cells,MNC and HL-60 cells.The effect of MK886 on cell cycle,cyclin D1,mPGES-1,PGE2,P-Akt and c-myc of HL-60/A cells were observed.Results Compared with MNC and HL-60 cells,the expression of cyclin D1 and mPGES-1 were higher in HL-60/A cells,the percentage of G0-G1 phase was decreased [MNC (62.63±6.58) ％,HL-60 (38.86±2.25) ％,HL-60/A (30.53±2.15) ％]and S phase increased[MNC (12.18±4.43) ％,HL-60 (47.70±1.88）％,HL-60/A (57.56±1.54) ％](all P＜ 0.05).After treated with MK886,cell cycle was arrested in G0-G1 phase.The expression of mPGES-1,cyclin D1,P-Akt and c-myc and synthesis of PGE2 were decreased.Conclusion MK886 can arrest HL-60/A cell cycles in G0-G1 phase,which possibly through down-regulation of mPGES-1/PGE2,reduction cyclin D1,P-Akt and c-myc expression.
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Chinese patent medicines Compound Danshen Dripping Pills (DSP) and Di'ao Xinxuekang (DXK) capsules were both found effective in treating angina pectoris. However, there is no systematic review comparing their efficacy.
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Objectiye To investigate the effect of selective COX-2 inhibitor, nimesulide, on inhibiting proliferation of the human acute myeloid leukemia HL-60 cells. Methods HL-60 cells were treated with different concentration of nimesulide. HL-60 cell proliferation was examined by CCK-8 method. Flow cytometry, Western blotting and ELISA were used to measure the effect of nimesulide on apoptosis, cell cycle,COX-2, PGE2, bax, bcl-2 and c-myc. Results Nimesulide inhibited HL-60 cells proliferation in a dose and time dependence manner. Nimesulide induced cell apoptosis and arrested cell cycle in G0-G1 phase. The expression of COX-2 protein declined after treated with nimesulide 48 h, the total apoptosis in 100, 200,400 μmol/L nimesulide-treated group and control group were (24.97 ± 6.36) %, (34.22 ± 5.76) %, (44.59 ±6.69) % and (4.11 ± 1.26) %, there were significant differences (P ＜ 0.05). Nimesulide inhibited the synthesis of PGE2, the expressions of bcl-2 and c-myc protein and upregulated the expression of bax protein simultaneity.Conclusion Nimesulide significantly inhibited the proliferation of HL-60 cells and induced cell apoptosis,which may be associated with the downregulation of COX-2 expression, reduction of PGE2 synthesis, arrest of cell cycle and regulation bcl-2, c-myc and bax protein expression.
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Objective To detect the expression of VEGF in NHL and analyze the relation of the expression levels with malignant aggressiveness,treatment response,and prognosis.Methods The expression of VEGF in lymph nodes taken from 39 NHL patients Wag measured by immunohistochemical-staining method.9 patients with benign lymphadenopathy were acted as control.Results The expression of VEGF in NHL(79.5%)was higher than that in the contrel(44.4%)(P=0.048＜0.05).In NHL,the VEGF level was higher in aggressive lympboma than that in indolent lymphoma(x2=5.284,P=0.044＜0.05).The patients had the higher-level expression as the Ann Arbor stage Wag higher,and the patients who had the higher-level expression of VEGF had higher serum LDH level,lower chemotherapy remission,unfavorable prognosis and lower 3-year survival (P＜0.05).Conclusion The expression of VEGF in NHL was increased.It was correlated with histopathological grade,Ann Arbor stage,chemotherapy response and prognosis.
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Objective To explore the correlation of atheroselerosis progression and the expression of platelet derived endothelial nitric oxide synthase (eNOS) in rabbits. Methods A total of 24 male New Zealand white rabbits were used in this study. Six of the animals were fed with normal food (control group). Eighteen rabbits were fed with cholesterol-rich food (1 g/d) for 12 weeks to establish the atherosclerosis model. Among 18 models, 6 rabbits were executed immediately and their aorta and platelet samples were collected for further analysis (model group), 6 rabbits were orally administered with pravastatin (10 rag/d) for additional 12 weeks (treated group), and the remaining 6 rabbits were left untreated until the end of the study (untreated group). The control, treated and untreated animals were then killed, and the aorta and platelet samples were collected for eNOS expression analysis (RT-PCR). Results The aorta samples in model and untreated group exhibited rough intima and a lot of longitudinal fatty streaks, which indicated that atherosclerosis models were established successfully. While in treated group, the degree of atherosclerosis was decreased. The average percent of thickness of fatty streaks or atheroselerotic plaques relative to the whole thickness of vessel walls was 0. 04±0. 02, 0. 82±0. 16, 0. 33±0. 18,0. 77±0. 14 in control, model, treated and untreated group, respectively. The thickness of fatty streaks or atherosclerotic plaques was significantly increased in the model and untreated groups and decreased in treated group compared with the control group (both P<0. 05). The expressions of platelet derived eNOS/mRNA were 1. 02± 0. 28, 0. 41± 0. 27, 1.00 ± 0. 77, 0. 40±0. 29 in control, model, treated and untreated group, respectively. The expression of eNOS/mRNA was markedly decreased in model group and untreated group compared with the control group, but was increased in treated group compared with untreated and model groups (F=3. 544, P = 0. 024). Conclusions There is a negative correlation between eNOS expression and atherosclerosis development, which suggests that the reversal effect of pravastatin on atheroselerosis progression and plaque formation may relate to the expression of platelet derived eNOS.
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To understand the expression and effect of mismatch repair genes, hMSH2 and hMLH1, and to investigate anti-leukemic cell proliferation mechanism of curcumin, the levels of both genes were detected by multiple comparative RT-PCR. The protein of hMSH2 was determined by flow cytometry (FCM) and the gene mutation of hMSH2 and hMLH1 were detected by PCR-SSCP and microsatellite instability assay. After UV irradiation, the gene expression of hMSH2 and hMLH1 was not increased and showed no response. This phenomenon was not ascribed to gene mutation, because PCP-SSCP and microsatellite instability assay revealed no abnormal gel-shift band in both genes. After irradiation and addition of curcumin, the expression of hMSH2 mRNA increased and the cellular apoptotic rate also increased at the same time. The difference was statistically significant as compared with groups without addition of curcumin and control groups (P < 0.05). Our results suggested that when MMR system was inhibited by the same agents, curcumin can remove this suppression and switch to cellular apoptosis.
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Humans , Antineoplastic Agents, Phytogenic , Pharmacology , Apoptosis , Base Pair Mismatch , Genetics , Curcumin , Pharmacology , DNA Repair , DNA-Binding Proteins , HL-60 Cells , Radiation Effects , MutS Homolog 2 Protein , Neoplasm Proteins , Metabolism , Polymerase Chain Reaction , Polymorphism, Single-Stranded Conformational , Proteins , Proto-Oncogene Proteins , Ultraviolet RaysABSTRACT
To investigate whether the Bcl-2 gene family is involved in modulating mechanism of apoptosis and change of cell cycle protein induced by curcumin in acute myeloid leukemia HL-60 cell line and primary acute myelogenous leukemic cells, the Bcl-2 family member Mcl-1, Bax and Bak and cell cycle proteins including P27kipl, P21wafl, cyclin D3 and pRbp- were selected and their expression detected by SABC immuno-histochemical stain method. The attitude of sub-G1 peak in DNA histogram was determined by FCM. The TUNEL positive cell percentage was identified by terminal deoxynucleotidyl transferase (TdT)-mediated Biotin dUNP end labeling technique. It was found that when HL-60 cells were treated with 25 mumol/L curcumin for 24 h, the expression level of Mcl-1 was down-regulated, but that of Bax and Bak up-regulated time-dependently. There was significant difference in the expression level of Mcl-1, Bax and Bak between the curcumin-treated groups and control group (P < 0.05-0.01). At the same time, curcumin had no effect on progress of cell cycle in primaty acute myelogenous leukemia at newly diagnosis, but could increase the peak of Sub-G1 (P < 0.05), and down-regulate the expression of Mcl-1 and up-regulate the expression of Bax and Bak with the difference being statistically significant. The expression of P27kipl, P21wafl and pRbp- were elevated and that of cyclin D3 decreased in the presence of curcumin. These findings suggested that the Bcl-2 gene family indeed participated in the regulatory process of apoptosis induced by curcumin in HL-60 cells and AML cells. Curcumin can induce apoptosis of primary acute myelogenous leukemic cells and disturb cell cycle progression of HL-60 cells. The mechanism appeared to be mediated by perturbing G0/G1 phases checkpoints which associated with up-regulation of P27kipl, P21wafl and pRbp- expression, and down-regulation of cyclin D3.
Subject(s)
Antineoplastic Agents, Phytogenic/pharmacology , Apoptosis/drug effects , Cell Cycle Proteins/metabolism , Curcumin/pharmacology , Genes, bcl-2/genetics , HL-60 Cells , Leukemia, Myeloid, Acute/pathology , Neoplasm Proteins/biosynthesis , Neoplasm Proteins/genetics , Proto-Oncogene Proteins/biosynthesis , Proto-Oncogene Proteins/genetics , Proto-Oncogene Proteins c-bcl-2/metabolism , Tumor Cells, Cultured , bcl-2-Associated X ProteinABSTRACT
To investigate whether the Bcl-2 gene family is involved in modulating mechanism of apoptosis and change of cell cycle protein induced by curcumin in acute myeloid leukemia HL-60 cell line and primary acute myelogenous leukemic cells, the Bcl-2 family member Mcl-1, Bax and Bak and cell cycle proteins including P27kipl, P21wafl, cyclin D3 and pRbp- were selected and their expression detected by SABC immuno-histochemical stain method. The attitude of sub-G1 peak in DNA histogram was determined by FCM. The TUNEL positive cell percentage was identified by terminal deoxynucleotidyl transferase (TdT)-mediated Biotin dUNP end labeling technique. It was found that when HL-60 cells were treated with 25 mumol/L curcumin for 24 h, the expression level of Mcl-1 was down-regulated, but that of Bax and Bak up-regulated time-dependently. There was significant difference in the expression level of Mcl-1, Bax and Bak between the curcumin-treated groups and control group (P < 0.05-0.01). At the same time, curcumin had no effect on progress of cell cycle in primaty acute myelogenous leukemia at newly diagnosis, but could increase the peak of Sub-G1 (P < 0.05), and down-regulate the expression of Mcl-1 and up-regulate the expression of Bax and Bak with the difference being statistically significant. The expression of P27kipl, P21wafl and pRbp- were elevated and that of cyclin D3 decreased in the presence of curcumin. These findings suggested that the Bcl-2 gene family indeed participated in the regulatory process of apoptosis induced by curcumin in HL-60 cells and AML cells. Curcumin can induce apoptosis of primary acute myelogenous leukemic cells and disturb cell cycle progression of HL-60 cells. The mechanism appeared to be mediated by perturbing G0/G1 phases checkpoints which associated with up-regulation of P27kipl, P21wafl and pRbp- expression, and down-regulation of cyclin D3.