AIM:To evaluate whether attenuated Salmonella typhimurium producing Helicobacter pylori(H pylori) urease subunit B (UreB) could induce systemic immune responses against Hpylori infection. METHODS: Attenuated 5. typhim...AIM:To evaluate whether attenuated Salmonella typhimurium producing Helicobacter pylori(H pylori) urease subunit B (UreB) could induce systemic immune responses against Hpylori infection. METHODS: Attenuated 5. typhimurium SL3261 was used as a live carrier of plasmid pTC01-UreB, which encodes recombinant H pylori UreB protein. Balb/c mice were given oral immunization with two doses of SL3261/pTC01-UreB at a 3-wk interval. Twelve weeks after oral immunization of mice, serum IgG antibodies were evaluated by ELISA assay. Gamma interferon (IFN-γ) and interleukin 10 (IL-10) in the supernatant of spleen cell culture were also assessed by ELISA. RESULTS: After oral immunization of mice, serum specific IgG antibodies against UreB in vaccine group were much higher than that in PBS and native Salmonella SL3261 control groups (A450, 0.373±0.100 vs 0.053±0.022, 0.142±0.039, respectively, P<0.01). Moreover, IFN-γ in vaccine group was on average 167.53±29.93 pg/mL, which showed a significant increase vs that of PBS control group (35.68±3.55 pg/mL, P<0.01). There was also a tremendous increase of IL-10 in vaccine group compared to PBS and SL3261 control groups (275.13±27.65 pg/mL vs 56.00±7.15 pg/mL, 68.02±15.03 pg/mL, respectively, P<0.01). In addition, no obvious side effects in mice and no change in gastric inflammation were observed. CONCLUSION: The multiple oral immunizations with the attenuated 5. typhimurium expressing Hpylori UreB could induce significant systemic immune responses, suggesting it may be used as oral vaccine against H pylori infection.展开更多
目的探讨全身免疫炎症反应指数(SIIRI)与冠心病患者冠状动脉狭窄严重程度及其远期主要不良心血管事件(MACE)发生风险的关系。方法回顾性连续纳入2020年12月至2021年12月因胸痛在中国人民解放军联勤保障部队第九〇四医院住院治疗并行冠...目的探讨全身免疫炎症反应指数(SIIRI)与冠心病患者冠状动脉狭窄严重程度及其远期主要不良心血管事件(MACE)发生风险的关系。方法回顾性连续纳入2020年12月至2021年12月因胸痛在中国人民解放军联勤保障部队第九〇四医院住院治疗并行冠状动脉造影检查的545例患者,根据冠状动脉造影检查结果分为冠心病组(435例)和非冠心病组(110例),根据Gensini评分将冠心病患者分为冠状动脉重度狭窄组(Gensini评分≥30分,272例)和冠状动脉轻度狭窄组(Gensini评分为1~<30分,163例)。SIIRI计算公式为SIIRI=中性粒细胞计数×单核细胞计数×血小板计数/淋巴细胞计数。冠心病患者随访1年,成功随访216例患者,根据有无终点事件分为MACE组(77例)、非MACE组(139例)。采用logistic回归模型分析冠心病和冠状动脉重度狭窄的独立预测因素,采用Cox比例风险回归模型分析冠心病患者经皮冠状动脉介入(PCI)治疗后发生MACE的独立危险因素,采用ROC曲线分析SIIRI对冠状动脉重度狭窄和MACE的预测价值。结果冠心病组的SIIRI高于非冠心病组[305.19×10^(18)(170.98×10^(18),550.76×10^(18))/L^(2) vs 121.25×10^(18)(91.17×10^(18),194.41×10^(18))/L^(2),P<0.001];当SIIRI取临界值251.02×10^(18)/L^(2)时预测冠心病的效能最高,灵敏度和特异度分别为58.9%和90.9%。冠状动脉重度狭窄组的SIIRI高于冠状动脉轻度狭窄组[420.75×10^(18)(238.76×10^(18),810.13×10^(18))/L^(2) vs 185.41×10^(18)(127.39×10^(18),294.07×10^(18))/L^(2),P<0.001];当SIIRI取临界值304.86×10^(18)/L^(2)时预测冠状动脉重度狭窄的效能最高,灵敏度和特异度分别为68.0%和79.1%。MACE组的SIIRI高于非MACE组[942.38×10^(18)(528.00×10^(18),1494.43×10^(18))/L^(2) vs 319.93×10^(18)(176.41×10^(18),498.90×10^(18))/L^(2),P<0.001];当SIIRI取临界值650.23×10^(18)/L^(2)时对冠心病患者行PCI治疗后发生MACE的预测能力最强,灵敏度和特异度分别为71.4%和84.9%。SI展开更多
文摘AIM:To evaluate whether attenuated Salmonella typhimurium producing Helicobacter pylori(H pylori) urease subunit B (UreB) could induce systemic immune responses against Hpylori infection. METHODS: Attenuated 5. typhimurium SL3261 was used as a live carrier of plasmid pTC01-UreB, which encodes recombinant H pylori UreB protein. Balb/c mice were given oral immunization with two doses of SL3261/pTC01-UreB at a 3-wk interval. Twelve weeks after oral immunization of mice, serum IgG antibodies were evaluated by ELISA assay. Gamma interferon (IFN-γ) and interleukin 10 (IL-10) in the supernatant of spleen cell culture were also assessed by ELISA. RESULTS: After oral immunization of mice, serum specific IgG antibodies against UreB in vaccine group were much higher than that in PBS and native Salmonella SL3261 control groups (A450, 0.373±0.100 vs 0.053±0.022, 0.142±0.039, respectively, P<0.01). Moreover, IFN-γ in vaccine group was on average 167.53±29.93 pg/mL, which showed a significant increase vs that of PBS control group (35.68±3.55 pg/mL, P<0.01). There was also a tremendous increase of IL-10 in vaccine group compared to PBS and SL3261 control groups (275.13±27.65 pg/mL vs 56.00±7.15 pg/mL, 68.02±15.03 pg/mL, respectively, P<0.01). In addition, no obvious side effects in mice and no change in gastric inflammation were observed. CONCLUSION: The multiple oral immunizations with the attenuated 5. typhimurium expressing Hpylori UreB could induce significant systemic immune responses, suggesting it may be used as oral vaccine against H pylori infection.
文摘目的探讨全身免疫炎症反应指数(SIIRI)与冠心病患者冠状动脉狭窄严重程度及其远期主要不良心血管事件(MACE)发生风险的关系。方法回顾性连续纳入2020年12月至2021年12月因胸痛在中国人民解放军联勤保障部队第九〇四医院住院治疗并行冠状动脉造影检查的545例患者,根据冠状动脉造影检查结果分为冠心病组(435例)和非冠心病组(110例),根据Gensini评分将冠心病患者分为冠状动脉重度狭窄组(Gensini评分≥30分,272例)和冠状动脉轻度狭窄组(Gensini评分为1~<30分,163例)。SIIRI计算公式为SIIRI=中性粒细胞计数×单核细胞计数×血小板计数/淋巴细胞计数。冠心病患者随访1年,成功随访216例患者,根据有无终点事件分为MACE组(77例)、非MACE组(139例)。采用logistic回归模型分析冠心病和冠状动脉重度狭窄的独立预测因素,采用Cox比例风险回归模型分析冠心病患者经皮冠状动脉介入(PCI)治疗后发生MACE的独立危险因素,采用ROC曲线分析SIIRI对冠状动脉重度狭窄和MACE的预测价值。结果冠心病组的SIIRI高于非冠心病组[305.19×10^(18)(170.98×10^(18),550.76×10^(18))/L^(2) vs 121.25×10^(18)(91.17×10^(18),194.41×10^(18))/L^(2),P<0.001];当SIIRI取临界值251.02×10^(18)/L^(2)时预测冠心病的效能最高,灵敏度和特异度分别为58.9%和90.9%。冠状动脉重度狭窄组的SIIRI高于冠状动脉轻度狭窄组[420.75×10^(18)(238.76×10^(18),810.13×10^(18))/L^(2) vs 185.41×10^(18)(127.39×10^(18),294.07×10^(18))/L^(2),P<0.001];当SIIRI取临界值304.86×10^(18)/L^(2)时预测冠状动脉重度狭窄的效能最高,灵敏度和特异度分别为68.0%和79.1%。MACE组的SIIRI高于非MACE组[942.38×10^(18)(528.00×10^(18),1494.43×10^(18))/L^(2) vs 319.93×10^(18)(176.41×10^(18),498.90×10^(18))/L^(2),P<0.001];当SIIRI取临界值650.23×10^(18)/L^(2)时对冠心病患者行PCI治疗后发生MACE的预测能力最强,灵敏度和特异度分别为71.4%和84.9%。SI
