Severe acute pancreatitis

重症急性胰腺炎
  • 文章类型: Case Reports
    背景:胰腺创伤(PT)在创伤性损伤中很少见,发病率低,但它仍然会导致严重的感染并发症,导致高死亡率。急性胰腺炎(AP)是PT后常见的并发症,当合并器官功能障碍和败血症时,这将导致预后较差。
    方法:我们报告了一名25岁的多器官损伤患者,包括胰腺,由于腹部创伤,继发于紧急剖腹产的坏死性胰腺炎,合并腹腔感染(IAI)。患者接受了经皮引流,胰腺坏死组织清创术,对患者进行腹腔感染病灶清创。
    结论:我们报告一例严重AP和继发于创伤的IAI。该患者通过保守治疗如抗生素治疗和液体支持与手术相结合来管理。并获得了更好的结果。
    BACKGROUND: Pancreatic trauma (PT) is rare among traumatic injuries and has a low incidence, but it can still lead to severe infectious complications, resulting in a high mortality rate. Acute pancreatitis (AP) is a common complication after PT, and when combined with organ dysfunction and sepsis, it will result in a poorer prognosis.
    METHODS: We report a 25-year-old patient with multiple organ injuries, including the pancreas, due to abdominal trauma, who developed necrotising pancreatitis secondary to emergency caesarean section, combined with intra-abdominal infection (IAI). The patient underwent performed percutaneous drainage, pancreatic necrotic tissue debridement, and abdominal infection foci debridement on the patient.
    CONCLUSIONS: We report a case of severe AP and IAI secondary to trauma. This patient was managed by a combination of conservative treatment such as antibiotic therapy and fluid support with surgery, and a better outcome was obtained.
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  • 文章类型: Journal Article
    本研究的目的是研究重症急性胰腺炎(SAP)患者有无腹腔感染时肠道微生态成分的变化,并分析抗生素耐药基因的表达,为感染性疾病的早期预警和合理使用抗生素提供依据。
    20例SAP患者纳入研究。根据入选患者是否继发腹腔内感染,他们分为两组,每个由10名患者组成。当患者入院急诊重症监护病房(EICU)时,收集粪便标本,并进行核酸提取。采用下一代基因测序比较两组间肠道菌群多样性和耐药基因表达的差异。
    感染组患者的肠道菌群分布在多个聚集的分支上,具有一些组内异质性,它们的植物多样性受到损害。感染组显示肠道微生物群中各种机会细菌的富集,伴随着大量的代谢功能,对外部信号的应力函数,以及与发病机制相关的基因。耐药基因在两组的肠道菌群中均有表达,但它们的丰度在未感染组中显著较低。
    感染组患者的肠道菌群分布在多个聚集的分支上,具有一些组内异质性,它们的植物多样性受到损害。此外,耐药基因在两组的肠道微生物群中都有表达,尽管未感染组的丰度显着降低。
    UNASSIGNED: The objective of the study is to investigate the changes in the composition of intestinal microecology in severe acute pancreatitis (SAP) patients with or without intra-abdominal infection and also to analyze the expression of antibiotic resistance genes to provide evidence for early warning of infectious diseases and the rational use of antibiotics.
    UNASSIGNED: Twenty patients with SAP were enrolled in the study. According to whether the enrolled patients had a secondary intra-abdominal infection, they were divided into two groups, each consisting of 10 patients. Stool specimens were collected when the patients were admitted to the emergency intensive care unit (EICU), and nucleic acid extraction was performed. Next-generation gene sequencing was used to compare the differences in intestinal microflora diversity and drug resistance gene expression between the two groups.
    UNASSIGNED: The gut microbiota of patients in the infection group exhibited distribution on multiple clustered branches with some intra-group heterogeneity, and their flora diversity was compromised. The infected group showed an enrichment of various opportunistic bacteria in the gut microbiota, along with a high number of metabolic functions, stress functions to external signals, and genes associated with pathogenesis. Drug resistance genes were expressed in the gut microbiota of both groups, but their abundance was significantly lower in the non-infected group.
    UNASSIGNED: The intestinal microbiota of patients in the infection group exhibited distribution on multiple clustered branches with some intra-group heterogeneity, and their flora diversity was compromised. Additionally, drug resistance genes were expressed in the gut microbiota of both groups, although their abundance was significantly lower in the non-infected group.
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  • 文章类型: Journal Article
    重症急性胰腺炎(SAP)是一种不同严重程度的炎症性疾病,从轻度局部炎症到严重的全身性疾病,具有较高的发病率和死亡率。目前的药物治疗并不理想。因此,迫切需要更安全、更有效的治疗药物。7α,14β-二羟基-ent-kaur-17-二甲基氨基-3,15-二酮DGA,一种从蓝藻毒素A衍生的二萜化合物,表现出抗炎活性。在这项研究中,我们证明了DGA对SAP的治疗潜力,并阐明了其潜在机制.用DGA处理显着(1)抑制了Nigericin和脂多糖诱导的RAW264.7和J774a.1细胞的死亡,(2)减轻水肿,腺泡细胞液泡化,坏死,和小鼠胰腺组织的炎症细胞浸润,(3)抑制血清脂肪酶活性和炎症因子IL-1β的分泌。DGA显著降低IL-1β和NLRP3的蛋白表达,抑制NF-κB的磷酸化。然而,DGA对caspase-1,gasderminD(GSDMD)的表达无抑制作用,NF-κB,TNF-α,或与凋亡相关的斑点样蛋白(ASC)以及caspase-1或GSDMD的裂解。分子对接模拟证实DGA可以与TLR4和IL-1受体结合。总之,DGA可能通过抑制TLR4和IL-1受体与其配体的结合,从而有效缓解小鼠和巨噬细胞SAP的症状;DGA是治疗SAP患者的有希望的候选药物。
    Severe acute pancreatitis (SAP) is an inflammatory disease with varying severity, ranging from mild local inflammation to severe systemic disease, with a high incidence rate and mortality. Current drug treatments are not ideal. Therefore, safer and more effective therapeutic drugs are urgently needed. 7α,14β-dihydroxy-ent-kaur-17-dimethylamino-3,15-dione DGA, a diterpenoid compound derivatized from glaucocalyxin A, exhibits anti-inflammatory activity. In this study, we demonstrated the therapeutic potential of DGA against SAP and elucidated the underlying mechanisms. Treatment with DGA markedly (1) inhibited death of RAW264.7 and J774a.1 cells induced by Nigericin and lipopolysaccharide, (2) alleviated edema, acinar cell vacuolation, necrosis, and inflammatory cell infiltration of pancreatic tissue in mice, and (3) inhibited the activity of serum lipase and the secretion of inflammatory factor IL-1β. DGA significantly reduced the protein expression of IL-1β and NLRP3 and inhibited the phosphorylation of NF-κB. However, DGA exhibited no inhibitory effect on the expression of caspase-1, gasdermin D (GSDMD), NF-κB, TNF-α, or apoptosis-associated speck-like protein (ASC) and on the cleavage of caspase-1 or GSDMD. Molecular docking simulation confirmed that DGA can bind to TLR4 and IL-1 receptor. In conclusion, DGA may effectively alleviate the symptoms of SAP in mice and macrophages by inhibiting the binding of TLR4 and IL-1 receptor to their ligands; therefore, DGA is a promising drug candidate for the treatment of patients with SAP.
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  • 文章类型: Journal Article
    背景:肠功能障碍在重症急性胰腺炎(SAP)的临床进展和预后中起重要作用。清胰汤(QYD)对肠道功能恢复具有有益作用,但QYD对肠麻痹的预防作用及其机制尚未完全探讨。
    方法:通过网络药理学揭示了可能的分子机制,包括活性成分和潜在目标预测,还有GO,KEGG,和收益途径富集分析。通过分子对接探索了QYD的主要活性成分与核心基因之间的潜在相互作用。对天津市南开医院137例SAP患者进行回顾性队列研究,评价QYD对肠麻痹的预防作用。
    结果:共筛选出QYD中的110种活性成分,网络药理学预测了37个关键靶标。GO,KEGG,和REATCOME富集分析表明,hub基因的生物信息学注释主要涉及肠上皮功能和炎症反应途径。QYD的主要成分与IL-6、TNF、CASP3、CXCL8和CRP通过分子对接。使用QYD加常规治疗的患者肠麻痹率似乎较低,降低肾功能不全的风险,ARDS和血液净化治疗,缩短住院时间和ICU住院时间。多因素回归分析显示,QYD的鼻饲灌肠给药方式(P=0.010)和QYD的及时干预(P=0.045)是SAP患者预防肠麻痹的独立保护因素。
    结论:结论:QYD可作为预防SAP患者肠麻痹发生发展的有效辅助手段。其机制可能与抗炎反应和维持肠上皮功能有关。
    BACKGROUND: Intestinal dysfunction plays an important role in the clinical progress and prognosis of severe acute pancreatitis (SAP). Qingyi decoction (QYD) has shown beneficial effects on intestinal function recovery, but the prevention actions of the QYD on intestinal paralysis and its mechanism have not been fully explored.
    METHODS: The possible molecular mechanism was unraveled by network pharmacology, including active ingredients and potential target prediction, as well as GO, KEGG, and REATCOME pathway enrichment analyses. The potential interactions between the main active ingredients of the QYD and core genes were explored by molecular docking. A retrospective cohort study on 137 patients with SAP from Tianjin Nankai Hospital was conducted to evaluate the preventive effect of QYD on intestinal paralysis.
    RESULTS: A total of 110 active ingredients in QYD were screened out, and 37 key targets were predicted by network pharmacology. GO, KEGG, and REATCOME enrichment analyses showed that bioinformatics annotation of the hub genes was mainly involved in intestinal epithelial functions and inflammatory response pathways. The main components of QYD possessed good affinity with IL-6, TNF, CASP3, CXCL8, and CRP by molecular docking. Patients who used QYD plus usual care seemed to have fewer intestinal paralysis rates, lower risk of renal insufficiency, ARDS and blood purification therapy, and shorter hospital and ICU stays. The multivariable regression analyses indicated that the mode of nasogastric and enemas administration of QYD (P = 0.010) and timely intervention with QYD (P = 0.045) were the independent protective factors for intestinal paralysis prevention in patients with SAP.
    CONCLUSIONS: In conclusion, QYD can be used as an effective adjuvant procedure to prevent the occurrence and development of intestinal paralysis in patients with SAP. The mechanisms may be involved in the anti-inflammatory response and maintenance of intestinal epithelial function.
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  • 文章类型: Journal Article
    通过单中心数据评估血液净化(BP)在重症急性胰腺炎(SAP)中的长期疗效和成本效益。
    共收集155例SAP患者,随访6个月。根据是否接受BP治疗分为对照组(49例)和BP组(106例)。主要结果是6个月死亡率,住院时间,和住院费用。倾向得分匹配(PSM)分析基于各种因素,如性别,年龄,病因学,SOFA得分,JSS得分,和第1天的肌酐值。
    所有基线数据与对照组之间均存在显着差异(p<0.05)。然而,死亡率有显著差异,住院时间,住院费用和感染加重率在6个月的结局数据中(均p<0.05)。在任何调整后的模型中,BP都不被认为是死亡因素,p值范围从0.81到0.93。PSM后的亚组分析结果显示,BP模式对预后指标无显著影响,但ICU住院时间和总费用显著增加(均p<0.001).在6个月后不需要早期干预的病例中,死亡率没有显着差异(p=0.487)。然而,与对照组相比,BP组患者ICU住院时间更长(p=0.001),住院费用更高(p<0.001).
    使用BP治疗并没有降低SAP患者的6个月死亡率。此外,BP治疗对ICU住院时间或住院费用有显著影响。然而,这种疗法的效果和成本效益都不能令人满意,早期干预并不能提高生存获益。此外,单用连续性静脉-静脉血液滤过(CVVH)和复合BP之间的生存获益没有显著差异.
    UNASSIGNED: To evaluate the long-term efficacy and cost-efficiency of blood purification (BP) in severe acute pancreatitis (SAP) through single-center data.
    UNASSIGNED: A total of 155 SAP patients were collected and followed up for 6 months. The participants were divided into control (49 cases) and BP group (106 cases) according to whether they received BP treatment or not. The primary outcomes were 6-month mortality, length of hospital stay, and hospitalization costs. Propensity score matching (PSM) analysis was performed based on various factors such as gender, age, etiology, SOFA score, JSS score, and creatinine value on day 1.
    UNASSIGNED: There were significant differences in all baseline data between BP and control groups (p<0.05). However, there was a significant difference in the mortality, length of hospital stay, hospital costs and infection aggravation rate the in outcome data for 6-months (all p<0.05). BP was not considered a death factor in any adjusted models, with p-values ranging from 0.81 to 0.93. The results of subgroup analysis after PSM showed that BP mode had no significant impact on prognostic indicators, but the length of ICU stay and total costs were significantly increased (all p<0.001). There was no significant difference in mortality among the cases that did not require early intervention after 6 months (p=0.487). However, the patients in BP group had longer ICU stays (p=0.001) and higher hospitalization costs (p<0.001) compared to the control group.
    UNASSIGNED: The utilization of BP therapy did not decrease the 6-month mortality in SAP patients. Additionally, BP therapy has a significant impact on the duration of ICU stay or hospitalization expenses. However, the effectiveness and cost-efficiency of this therapy are unsatisfactory, and early intervention does not enhance survival benefits. Furthermore, there was no substantial variation in survival benefits between continuous veno-venous hemofiltration (CVVH) alone and compound BP.
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  • 文章类型: Journal Article
    先前的研究表明,MSC可以减轻急性胰腺炎(AP)期间胰腺的损伤。然而,与AP相关的急性死亡率更常见的是远端器官持续衰竭的结果,而不是局部损坏,特别是在重症急性胰腺炎(SAP),MSC的作用可能因其来源而异。
    通过胆管逆行注射5%牛磺胆酸钠溶液,在8周C57BL/6J雄性小鼠中诱导SAP模型。将SAP小鼠分为SAP组,UC-MSCs组,和BMSCs组,用盐水治疗,1×106UC-MSCs,和1×106个BMSCs,通过尾静脉.治疗后,血清标记物,炎症,对胰腺进行形态学评估,肾脏,肺,和心。
    MSCs输注改善了SAP小鼠的全身炎症反应。在MSCs处理的SAP小鼠中,胰腺局部组织损伤和炎症反应减轻。但更重要的是,肾和肺损伤均显著缓解,IL-6、MCP-1、IL-1β等促炎因子水平,和肾脏中的TNF-α,肺和心脏急剧下降。在起源方面,与BMSCs相比,UC-MSCs表现出更好的疗效。此外,与正常对照小鼠相比,UC-MSCs显示较早的外观,更高的分布密度,在受伤组织中存在的持续时间更长。
    这项研究提供了令人信服的证据,支持MSCs在SAP治疗中的治疗潜力,特别是它们减轻多器官衰竭的能力。我们的结果还表明,UC-MSCs在SAP治疗中可能比BMSCs具有更大的优势。
    UNASSIGNED: Previous studies showed that MSCs could mitigate damage in the pancreas during acute pancreatitis (AP). However, acute mortality associated with AP was more often a result of persistent failure of remote organs, rather than local damage, especially in severe acute pancreatitis (SAP), and the effect of MSCs may vary depending on their origin.
    UNASSIGNED: An SAP model was induced in 8-week C57BL/6 J male mice by retrograde injection of 5 % sodium taurocholate solution through the bile duct. SAP mice were divided into the SAP group, UC-MSCs group, and BMSCs group, which were treated with saline, 1 × 106 UC-MSCs, and 1 × 106 BMSCs respectively, through the tail vein. After treatment, serum markers, inflammation, and morphology were assessed in the pancreas, kidneys, lungs, and hearts.
    UNASSIGNED: MSCs infusion ameliorated the systemic inflammatory response in SAP mice. In the MSCs-treated SAP mice, local tissue injury and inflammation response in the pancreas were alleviated. But more importantly, the renal and lung injury were all significantly and drastically mitigated, and the levels of pro-inflammatory factors such as IL-6, MCP-1, IL-1β, and TNF-α in the kidney, lung and heart were sharply decreased. In terms of origin, UC-MSCs exhibited superior efficacy compared with BMSCs. Furthermore, compared to the normal control mice, UC-MSCs showed an earlier appearance, higher distribution densities, and longer duration of presence in the injured tissue.
    UNASSIGNED: This study provides compelling evidence supporting the therapeutic potential of MSCs in SAP treatment and particularly their ability to mitigate multi-organ failure. Our results also suggested that UC-MSCs may offer greater advantages over BMSCs in SAP therapy.
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  • 文章类型: Journal Article
    引言急性胰腺炎是由多种因素引起的。该病可迅速进展为重症急性胰腺炎(SAP),这是一个致命的情况。SAP与全身炎症反应和微循环障碍有关,这是造成高死亡率的原因。低分子量肝素(LMWH),除了防止血栓形成,还具有减少细胞因子和炎症介质释放的性质。这有助于改善胰腺的微循环。材料和方法对60例诊断为SAP的患者进行前瞻性医院研究。将患者随机分为两组:常规治疗组(C组30例)和LMWH除常规治疗外(L组30例,由30名患者组成)。比较两个研究组的临床和实验室参数以及胰腺坏死(CTSPN)的计算机断层扫描(CT)评分。结果两组患者入院时的临床、实验室指标及CTSPN差异无统计学意义(p>0.05)。在开始治疗时,与C组相比,L组的症状和实验室指标改善率明显更高(p<0.05)。与C组相比,L组的急性生理和慢性健康评估(APACHE)II评分和并发症的发展显着降低(p<0.05)。与C组相比,L组的CTSPN非常低(p<0.05)。经过两周的治疗,与C组相比,L组的治疗恢复率更高,L组死亡率很低(p<0.05,有显著性)。结论在SAP常规治疗基础上加用低分子肝素可提高疗效,改善临床疗效。提高恢复率,降低死亡率。LMWH对SAP的治疗非常有效,具有良好的安全性和易用性,并且没有很高的财务负担。
    Introduction Acute pancreatitis is caused by multiple factors. The disease can progress to severe acute pancreatitis (SAP) rapidly, which is a fatal condition. SAP is associated with systemic inflammatory response and disturbances in microcirculation, which are responsible for the high rate of mortality. Low-molecular-weight heparin (LMWH), apart from preventing thrombus formation, also has a property of reducing the release of cytokines and inflammatory mediators. This aids in the improvement of microcirculation of the pancreas. Materials and methods A prospective hospital-based study was conducted on 60 patients diagnosed with SAP. Patients were randomly divided into two groups: conventional treatment group (C group consisting of 30 patients) and LMWH in addition to conventional treatment (L group, consisting of 30 patients). Clinical and laboratory parameters and computed tomography (CT) scores of pancreatic necrosis (CTSPN) were compared in the two study groups. Results No significant difference (p > 0.05) was observed in the clinical and laboratory parameters and CTSPN among the two study groups at the time of admission. On initiation of treatment, the rate of improvement in symptoms and laboratory parameters were significantly higher in the L group compared with the C group (p < 0.05). Acute physiology and chronic health evaluation (APACHE) II score and development of complications were significantly lower in the L group compared with the C group (p< 0.05). CTSPN was found to be very low in the L group compared with the C group (p < 0.05). After two weeks of treatment, the recovery rate in response to treatment was observed to be higher in the L group compared to the C group, and the mortality rate was very low in the L group (p <0.05, significant). Conclusion The addition of LMWH to conventional treatment in SAP augments the effect and improves the clinical response, improving the recovery rate and decreasing mortality. LMWH is highly effective for the treatment of SAP, with a good safety profile and easy availability and without high financial burden.
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  • 文章类型: Journal Article
    背景:必须全面,正确地解释指南,以规范临床过程。然而,这一过程具有挑战性,需要口译员具有医学背景和资格。在这项研究中,评估了ChatGPT3.5回答与2019年重症急性胰腺炎指南相关的临床问题的准确性.
    结果:使用2019年重症急性胰腺炎指南进行了一项观察性研究。该研究比较了ChatGPT3.5在英语和汉语中的准确性,发现它在英语中(71%)比在汉语中(59%)更准确(P值:0.203)。此外,该研究评估了ChatGPT3.5回答简答题与真/假问题的准确性,发现它回答简答题(76%)比回答真/假问题(60%)更准确(P值:0.405).
    结论:对于重症急性胰腺炎的临床医生,ChatGPT3.5可能具有潜在价值。然而,临床决策不应过分依赖它。
    BACKGROUND: Guidelines must be interpreted comprehensively and correctly to standardize the clinical process. However, this process is challenging and requires interpreters to have a medical background and qualifications. In this study, the accuracy of ChatGPT3.5 in answering clinical questions related to the 2019 guidelines for severe acute pancreatitis was evaluated.
    RESULTS: An observational study was conducted using the 2019 guidelines for severe acute pancreatitis. The study compared the accuracy of ChatGPT3.5 in English versus Chinese and found that it was more accurate in English (71%) than in Chinese (59%) (P value: 0.203). Additionally, the study assessed the accuracy of ChatGPT3.5 in answering short-answer questions versus true/false questions and found that it was more accurate in answering short-answer questions (76%) than in answering true/false questions (60%) (P value: 0.405).
    CONCLUSIONS: For clinicians managing severe acute pancreatitis, ChatGPT3.5 may have potential value. However, it should not be relied upon excessively for clinical decision making.
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  • 文章类型: Journal Article
    背景/目标:早期识别有严重急性胰腺炎(SAP)风险的患者仍然是一个问题。入院前48小时内临床和实验室参数的动态评估可能为预测SAP和死亡等不良结果提供有价值的见解。方法:对三级转诊医院收治的AP患者进行前瞻性观察研究。入院时和48h时收集临床和实验室数据。根据修订的亚特兰大分类法对患者进行分类。采用Logistic回归分析确定SAP的独立危险因素。计算似然比和测试后概率以评估预测标志物的临床有用性。结果:共纳入227例患者,胆道病因学是最常见的,SAP的患病率和死亡率分别为10.7%和5.7%,分别。入院时BISAP≥2,48小时后出现SIRS,心率上升超过20bpm,48h后BUN升高是SAP的独立危险因素。这些因素的结合增加了SAP和死亡的测试后概率,BISAP≥2并在48小时后出现SIRS的概率最高(82%和73%,分别)。结论:BUN的动态评估,心率,入院前48小时内的SIRS和SIRS可以帮助预测AP患者的SAP发展和死亡。这些发现强调了持续监测的重要性,尽管有必要进行多中心研究以完善SAP的预测模型。
    Background/Objectives: Early identification of patients at risk of developing severe acute pancreatitis (SAP) is still an issue. Dynamic assessment of clinical and laboratory parameters within the first 48 h of admission may offer valuable insights into the prediction of unfavorable outcomes such as SAP and death. Methods: A prospective observational study was conducted on a cohort of patients admitted for AP at a tertiary referral hospital. Clinical and laboratory data were collected on admission and at 48 h. Patients were classified based on the Revised Atlanta classification. Logistic regression analysis was performed to identify independent risk factors for SAP. Likelihood ratios and post-test probabilities were calculated to assess the clinical usefulness of predictive markers. Results: 227 patients were included, with biliary etiology being the most common and a prevalence of SAP and death of 10.7% and 5.7%, respectively. BISAP ≥ 2 on admission, presence of SIRS after 48 h, rise in heart rate over 20 bpm, and any increase in BUN after 48 h were independent risk factors for SAP. The combination of these factors increased the post-test probability of SAP and death, with BISAP ≥ 2 combined with the presence of SIRS after 48 h showing the highest probability (82% and 73%, respectively). Conclusions: Dynamic assessment of BUN, heart rate, and SIRS within the first 48 h of admission can aid in predicting the development of SAP and death in patients with AP. These findings underscore the importance of continuous monitoring, although multicenter studies are warranted to refine predictive models for SAP.
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  • 文章类型: Journal Article
    背景:Ferroptosis是一种新认识的调节性细胞死亡形式,其特征在于由铁超负荷和活性氧(ROS)的产生引发的严重脂质过氧化。然而,严重急性胰腺炎(SAP)中铁死亡的作用尚未完全阐明.
    方法:我们建立了4个大鼠重症急性胰腺炎模型,包括假对照组,SAP集团,Fer-1处理的SAP(SAP+Fer-1)组,3-MA处理的SAP(SAP+3-MA)组。SAP组采用胰管逆行注射牛磺胆酸钠诱导。其他两组均腹腔注射铁凋亡抑制剂(Fer-1)和自噬抑制剂(3-MA),分别。成功建立了淀粉酶相关炎症因子的重症急性胰腺炎模型。然后我们检测到铁凋亡(GPX4,SLC7A1等。)和自噬相关因子(LC3II,p62ect.)进一步阐明铁凋亡与自噬的关系。
    结果:我们的研究发现,在SAP的发展过程中会发生铁死亡,例如胰腺组织中的铁和脂质过氧化,还原型谷胱甘肽过氧化物酶4(GPX4)和谷胱甘肽(GSH)的水平降低,并增加丙二醛(MDA)和显著的线粒体损伤。此外,铁凋亡相关蛋白如GPX4、溶质载体家族7成员11(SLC7A11)和铁蛋白重链1(FTH1)均显著降低。接下来,研究了SAP中铁死亡的发病机制。首先,用铁凋亡抑制剂铁抑素-1(Fer-1)治疗可显着减轻SAP的铁凋亡。有趣的是,自噬发生在SAP的发病机制中,自噬促进SAP铁凋亡的发生。此外,3-甲基腺嘌呤(3-MA)抑制自噬可以显着降低SAP中铁过载和铁凋亡。
    结论:我们的结果表明,铁凋亡是SAP的一种新的发病机制,并且依赖于自噬。本研究为SAP的研究提供了新的理论基础。
    BACKGROUND: Ferroptosis is a newly recognized form of regulatory cell death characterized by severe lipid peroxidation triggered by iron overload and the production of reactive oxygen species (ROS). However, the role of ferroptosis in severe acute pancreatitis(SAP) has not been fully elucidated.
    METHODS: We established four severe acute pancreatitis models of rats including the sham control group, the SAP group, the Fer -1-treated SAP (SAP + Fer-1) group, the 3-MA-treated SAP (SAP + 3-MA) group. The SAP group was induced by retrograde injection of sodium taurocholate into the pancreatic duct. The other two groups were intraperitoneally injected with ferroptosis inhibitor (Fer-1) and autophagy inhibitor (3-MA), respectively. The model of severe acute pancreatitis with amylase crest-related inflammatory factors was successfully established. Then we detected ferroptosis (GPX4, SLC7A1 etc.) and autophagy-related factors (LC3II, p62 ect.) to further clarify the relationship between ferroptosis and autophagy.
    RESULTS: Our study found that ferroptosis occurs during the development of SAP, such as iron and lipid peroxidation in pancreatic tissues, decreased levels of reduced glutathione peroxidase 4 (GPX 4) and glutathione (GSH), and increased malondialdehyde(MDA) and significant mitochondrial damage. In addition, ferroptosis related proteins such as GPX4, solute carrier family 7 member 11(SLC7A11) and ferritin heavy chain 1(FTH1) were significantly decreased. Next, the pathogenesis of ferroptosis in SAP was studied. First, treatment with the ferroptosis inhibitor ferrostatin-1(Fer-1) significantly alleviated ferroptosis in SAP. Interestingly, autophagy occurs during the pathogenesis of SAP, and autophagy promotes the occurrence of ferroptosis in SAP. Moreover, 3-methyladenine (3-MA) inhibition of autophagy can significantly reduce iron overload and ferroptosis in SAP.
    CONCLUSIONS: Our results suggest that ferroptosis is a novel pathogenesis of SAP and is dependent on autophagy. This study provides a new theoretical basis for the study of SAP.
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