LncRNA NBR2靶向GSDMD调控脓毒症血管内皮细胞焦亡的作用及机制研究

项目来源

国家自然科学基金(NSFC)

项目主持人

杨毅

项目受资助机构

东南大学

立项年度

2019

立项时间

未公开

项目编号

81971888

研究期限

未知 / 未知

项目级别

国家级

受资助金额

55.00万元

学科

医学科学-急重症医学-脓毒症

学科代码

H-H16-H1601

基金类别

面上项目

关键词

细胞焦亡 ; 脓毒症 ; 内皮损伤 ; gasdermin D ; 长链非编码RNA NBR2 ;

参与者

谢剑锋;白莹;刘艾然;常炜;孙骎;彭菲;谢蓉蓉;刘清香

参与机构AI

江苏省重症医学重点实验室东南大学;南京医科大学;东南大学

项目标书摘要:细胞焦亡导致血管内皮损伤是脓毒症发生发展的关键环节,遏制血管内皮焦亡是减缓脓毒症进展的重要靶点。我们通过脓毒症患者全血转录组芯片及加权基因共表达网络分析发现lncRNA NBR2与焦亡关键分子GSDMD表达显著正相关;体外诱导内皮细胞焦亡后NBR2和GSDMD显著增加;沉默NBR2明显降低GSDMD表达同时抑制内皮细胞焦亡;提示抑制NBR2表达可能是减缓脓毒症内皮细胞焦亡的有效措施。同时,基于NBR2与GSDMD可结合相同核糖核蛋白,我们推测NBR2通过结合核糖核蛋白靶向调控GSDMD基因的表达调控细胞焦亡。本研究拟通过RNA-pulldown联合蛋白质谱筛选并验证介导NBR2靶向调控GSDMD表达的蛋白;敲除该蛋白验证NBR2调控GSDMD及细胞焦亡的机制;采用CRISPR/Cas9过表达或敲除内皮细胞NBR2,在体内外明确NBR2对脓毒症内皮细胞焦亡的调控作用,为脓毒症治疗提供新靶点。

Application Abstract: Vascular endothelial injury caused by pyroptosis is the key element in the development of sepsis,and inhibition of endothelial pyroptosis is the important target in amelioration of sepsis.We have found the positive correlation of lncRNA NBR2 with the pyroptosis executor GSDMD by weighted correlation network analysis in the whole blood transcriptome array in sepsis patients.NBR2 and GSDMD was significantly elevated in induced endothelial cell pyroptosis in vitro,while the expression of GSDMD was suppressed and pyroptosis alleviated by NBR2 silence,which suggested NBR2 suppression may be the plausible strategy in mitigating endothelial cell pyroptosis.We speculated that NBR2 could recruit and guide ribonucleoprotein combination for GSDMD regulation and pyroptosis promotion.In this project,we aim to screen and demonstrate the ribonucleoprotein regulating pyroptosis mediated via NBR2 by RNA-pulldown and protein mass spectrometry;clarify the mechanism of GSDMD regulation by NBR2 gene knock-out in endothelial cells;and to elucidate the regulatory effect of NBR2 in endothelial cell pyroptosis in vitro and in vivo,by NBR2 knock-out,to proffer novel target for sepsis therapy.

项目受资助省

江苏省

项目结题报告(全文)

脓毒症是全球医疗面临的巨大挑战,是重症医学亟待解决的重大难题。血管内皮损伤则是脓毒症发生发展过程中的关键环节,而细胞焦亡导致血管内皮损伤重要机制,遏制血管内皮焦亡是减缓脓毒症发生和进展的有效策略。①我们通过体内外敲除GSDMD阻断内皮细胞焦亡,发现阻断内皮细胞焦亡能够缓解脓毒症血管内皮细胞损伤,减轻全身炎症反应和器官损伤。②通过脓毒症患者全血转录组芯片及加权基因共表达网络分析发现lncRNA NBR2与焦亡关键分子GSDMD表达显著正相关;体外诱导内皮细胞焦亡后NBR2和GSDMD显著增加;沉默NBR2明显降低GSDMD表达同时抑制内皮细胞焦亡;提示抑制NBR2表达可能是减缓脓毒症内皮细胞焦亡的有效措施。③通过RNA-pulldown联合蛋白质谱筛选并验证介导NBR2靶向调控GSDMD表达的蛋白,筛选到HNRNPK蛋白介导NBR2和GSDMD互作。④采用染色质免疫共沉淀联合qPCR检测HNRNPK蛋白与GSDMD基因的相互作用,荧光素酶报告基因检测HNRNPK对GSDMD基因转录的调控作用,通过荧光原位杂交技术和免疫荧光检测NBR2与HNRNPK蛋白亚细胞分布和共定位情况,证实tLPS刺激NBR2和HNRNPK向细胞核内移位,结合到GSDMD基因上促进GSDMD基因转录,增强GSDMD表达,为脓毒症治疗提供新靶点。课题组最新研究发现,细胞焦亡时,会释放大量细胞外泌体,这些外泌体携带了执行细胞焦亡的GSDMD。⑤探究了脓毒症患者血浆外泌体中GSDMD与患者病情及预后的相关性,结果证实,血浆外泌体中GSDMD含量与脓毒症病情及预后密切相关,为评估脓毒症患者的病情及预后提供了重要指标。

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  • 1.Comparison of Esmolol Versus Landiolol on Mortality in Adult Patients With Sepsis: A Systematic Review and Network Meta-Analysis

    • 关键词:
    • beta-blockers; esmolol; landiolol; network meta-analysis; sepsis;ACTING BETA-BLOCKER; SEPTIC SHOCK; CONTROLLED-TRIALS; HEART-RATE;QUALITY; MULTICENTER; TACHYCARDIA; OUTCOMES

    Objectives:The clinical efficacy of short-acting beta-blockers in the management of sepsis remains uncertain. In particular, the comparative effects of two commonly used agents-esmolol and landiolol-have not been clearly established. This network meta-analysis aims to systematically evaluate and compare the effects of esmolol, landiolol, and standard of care (SOC) on mortality in patients with sepsis.Data Sources:A systematic search of PubMed, Web of Science, Embase, MEDLINE, CENTRAL, ClinicalTrials.gov, preprints, and citation searching was conducted before April 15, 2025.Study Selection:Randomized controlled trials that enrolled adult patients (>= 18 yr) diagnosed with sepsis or septic shock and treated with beta-blockers and conducted in ICUs.Data Extraction:Data were extracted on study characteristics, enrolled patients' characteristics, administration strategies of drugs, and key clinical outcomes (including 28-d mortality, ICU length of stay, and other relevant endpoints).Data Synthesis:A total of 1165 records were identified through searches of five databases, registries, and relevant references up to April 15, 2025. Ten studies involving 1035 patients were included, after screening and eligibility assessment. Compared with esmolol, landiolol was associated with increased 28-day mortality (relative risk [RR], 1.57; 95% CI, 1.08-2.30; low certainty) and higher norepinephrine requirements (mean difference [MD], 0.17 mu g/kg/min; 95% CI, 0.02-0.32; low certainty). Esmolol significantly reduced 28-day mortality (RR, 0.69; 95% CI, 0.56-0.85; moderate certainty) and 24-hour heart rate (MD, -16.92 beats/min; 95% CI, -23.49 to -10.36; moderate certainty) compared with SOC. In contrast, landiolol increased norepinephrine use compared with SOC (MD, 0.09 mu g/kg/min; 95% CI, 0.01-0.18; moderate certainty).Conclusions:Among patients with sepsis treated with beta-blockers, esmolol probably improves clinical outcomes compared with SOC. However, the effect of landiolol remains uncertain due to the low certainty of evidence. Esmolol may confer a relative clinical advantage over landiolol, but further studies are needed to confirm this finding and elucidate the underlying mechanisms.

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  • 3.High Dose Vitamin D3 Supplementation Is Not Associated With Lower Mortality in Critically Ill Patients: A Meta-Analysis of Randomized Control Trials

    • 关键词:
    • vitamin D3; cholecalciferol; intensive care unit (ICU); parenteralnutrition; prognosis;CRITICAL ILLNESS; MECHANICAL VENTILATION; INTENSIVE-CARE;CHOLECALCIFEROL; DURATION; CALCIUM

    Background: Vitamin D deficiency is a common condition in critically ill patients. A high dose of vitamin D3 can rapidly restore vitamin D levels. The aim of this meta-analysis was to synthesize the results from up-to-date randomized control trials (RCT) and validate the effect of vitamin D3 in critically ill patients.Study Methods: Several databases, including PubMed, Web of Science, EMBASE, and the Cochrane Central database, were searched up to December 4th, 2020. All RCTs that investigated the use of a high dose of vitamin D3 in critically ill patients and reported mortality data were included in themeta-analysis. The primary outcome was the mortality truncated to day 28 and day 90.Results: A total of 10 RCTs enrolling 2058 patients were finally included. The use of a high dose of vitamin D3 in critically ill patients could not decrease the mortality truncated to day 28 (RR 0.93, 95% CI 0.78-1.11, P = 0.43) or day 90 (RR 0.91, 95% CI 0.79-1.05, P = 0.21). A high dose of vitamin D3 could significantly reduce the ventilator days (MD -9.38, 95%CI -13.44 to -5.31, P < 0.001), but there were no statistic difference in length of ICU stay (MD -2.76, 95% CI -6.27 to 0.74, P = 0.12) and hospital stay (MD -2.42, 95% CI -6.21 to 1.36, P = 0.21). No significant difference was observed in adverse events between the vitamin D3 group and the placebo group.Conclusion: The use of high dose vitamin D3 was not associated with decreased mortality in critically ill patients, but could significantly reduce the ventilator days.

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  • 4.High Dose Vitamin D3 Supplementation Is Not Associated With Lower Mortality in Critically Ill Patients: A Meta-Analysis of Randomized Control Trials

    • 关键词:
    • vitamin D3; cholecalciferol; intensive care unit (ICU); parenteralnutrition; prognosis;CRITICAL ILLNESS; MECHANICAL VENTILATION; INTENSIVE-CARE;CHOLECALCIFEROL; DURATION; CALCIUM

    Background: Vitamin D deficiency is a common condition in critically ill patients. A high dose of vitamin D3 can rapidly restore vitamin D levels. The aim of this meta-analysis was to synthesize the results from up-to-date randomized control trials (RCT) and validate the effect of vitamin D3 in critically ill patients.Study Methods: Several databases, including PubMed, Web of Science, EMBASE, and the Cochrane Central database, were searched up to December 4th, 2020. All RCTs that investigated the use of a high dose of vitamin D3 in critically ill patients and reported mortality data were included in themeta-analysis. The primary outcome was the mortality truncated to day 28 and day 90.Results: A total of 10 RCTs enrolling 2058 patients were finally included. The use of a high dose of vitamin D3 in critically ill patients could not decrease the mortality truncated to day 28 (RR 0.93, 95% CI 0.78-1.11, P = 0.43) or day 90 (RR 0.91, 95% CI 0.79-1.05, P = 0.21). A high dose of vitamin D3 could significantly reduce the ventilator days (MD -9.38, 95%CI -13.44 to -5.31, P < 0.001), but there were no statistic difference in length of ICU stay (MD -2.76, 95% CI -6.27 to 0.74, P = 0.12) and hospital stay (MD -2.42, 95% CI -6.21 to 1.36, P = 0.21). No significant difference was observed in adverse events between the vitamin D3 group and the placebo group.Conclusion: The use of high dose vitamin D3 was not associated with decreased mortality in critically ill patients, but could significantly reduce the ventilator days.

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  • 5.Synbiotic Therapy Prevents Nosocomial Infection in Critically Ill Adult Patients: A Systematic Review and Network Meta-Analysis of Randomized Controlled Trials Based on a Bayesian Framework

    • 关键词:
    • critical illness; synbiotic; nosocomial infection; networkmeta-analysis; Bayesian;VENTILATOR-ASSOCIATED PNEUMONIA; SEVERE ACUTE-PANCREATITIS; EARLYENTERAL NUTRITION; CHAIN FATTY-ACIDS; INTERNATIONAL SCIENTIFICASSOCIATION; LACTOBACILLUS-PLANTARUM 299V; INTENSIVE-CARE UNITS;TUBE-FED PATIENTS; DOUBLE-BLIND; PARENTERAL-NUTRITION

    Background: The efficacy of synbiotics, probiotics, prebiotics, enteral nutrition or adjuvant peripheral parenteral nutrition (EPN) and total parenteral nutrition (TPN) in preventing nosocomial infection (NI) in critically ill adults has been questioned. We conducted a systematic review and network meta-analysis (NMA) of randomized controlled trials (RCTs) to evaluate and rank the effectiveness of these therapies on NI amongst critically ill adults.Methods: Four electronic databases were systematically searched up to June 30, 2019 for RCTs comparing the administration of probiotics, prebiotics, synbiotics, EPN and TPN in critically ill adults. The primary outcome was NI. The relative efficacy of all outcomes was determined by a Bayesian framework with random effects NMA. We estimated the odds ratio (OR) and mean difference (MD) and ranked the comparative effects of all regimens with the surface under the cumulative ranking probabilities. The study has been registered on PROSPERO (CRD42019147032).Results: Fifty-five RCTs (7,119 patients) were identified. Primary outcome showed that synbiotics had the best effect in preventing NI than EPN (OR 0.37; 95% CrI 0.22-0.61), probiotics followed (OR 0.52; 95% CrI 0.34-0.77), whereas TPN significantly increased NI (OR 2.29; 95% CrI 1.48-3.67). Subgroup analysis showed that TPN significantly increased NI in intensive care unit (ICU) patients (OR 1.57; 95% CrI 1.01-2.56) and severe acute pancreatitis (SAP) patients (OR 3.93; 95% CrI 1.74-9.15). Secondary outcomes showed that synbiotics were more effective in preventing hospital-acquired pneumonia (HAP) (OR 0.34; 95% CrI 0.11-0.85), catheter-related bloodstream infection (OR 0.08; 95% CrI 0.01-0.80), urinary tract infection (OR 0.27; 95% CrI 0.08-0.71) and sepsis (OR 0.34; 95% CrI 0.16-0.70) than EPN. Amongst the treatments, probiotics were most effective for shortening the mechanical ventilation duration (MD -3.93; 95% CrI -7.98 to -0.02), prebiotics were most effective for preventing diarrhea (OR 0.24; 95% CrI 0.05-0.94) and TPN was the least effective in shortening hospital length of stay (MD 4.23; 95% CrI 0.97-7.33).Conclusions: Amongst the five therapies, synbiotics not only prevented NI in critically ill adults but also demonstrated the best treatment results. By contrast, TPN did not prevent NI and ranked last, especially in ICU and SAP patients.Take-Home Message: Nosocomial infection is a leading cause of mortality in critically ill patients in the ICU. However, the efficacy of synbiotics, probiotics, prebiotics, enteral nutrition or adjuvant peripheral parenteral nutrition and total parenteral nutrition in preventing nosocomial infection in critically ill adults has been questioned. The network meta-analysis provides evidence that amongst the five therapies, synbiotics not only prevented NI in critically ill adults but also demonstrated the best treatment results. By contrast, TPN did not prevent NI and ranked last, especially in ICU and SAP patients. The results of this study will provide a new scientific basis and a new idea for the debate on the efficacy of synbiotics and other treatments in the improvement of prognosis in critically ill adult patients.Tweet: Synbiotic prevents nosocomial infection in critically ill adults, while total parenteral nutrition has the adverse curative.

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