Relationship between raised intraocular pressure and ischemia-modified albumin in serum and humor aqueous: a pilot study in rabbits

AIM:To evaluate the relationship between increased intraocular pressure(IOP),is chemia-modified albumin levels in serum(IMA-s)and in humor aqueous(IMA-HA)in rabbits.METHODS:Twenty-five albino New Zealand rabbits weighing between 2.0 and 2.8 kg were used in this pilot study.With permission from Canakkale Onsekiz Mart University Animal Ethics Committee,the IOP of both eyes of each rabbit were recorded with a Tonopen(Tono-Pen XL,Reichart Inc.,Depew,NY,USA)after the application of topical proparacaine 0.5%HCl anesthesia.Blood(4 mL)was collected from the marginal ear vein and an intracameral injection of 2.3 mg/mL sodium hyaluronate and subconjunctival dexamethasone was given in the right eye.Anterior chamber aqueous fluid was obtained using a limbal approach with a 27 gauge needle from both eyes.The left eyes were used as controls.IOP was measured on the 1st,3rdand 10thday after the initial injection,with Tonopen,IMA-s levels and IMA-HA examined simultaneously.RESULTS:Beforetheinjections,IOPwas11.4±3.0mmHg in the right eye and 11.3±3.1 mm Hg in the left eye(P】0.05).There was a statistically significant difference between IMA-s levels before the IOP increase(IMA-s0)and IMA-s levels on the 1stand 3rddays after the increase in IOP(P=0.012 and P=0.01,respectively).No difference was observed between IMA-s0and serum IMA levels on the 10thday(IMA-s10)after IOP increase(P=0.989).IMA-HA in the right eye in the first day after the injection was positively correlated with IOP(r=0.748;P=0.02).No othercorrelation is found between any other parameter with IMA-HAlevels at any test time.A statistically significant positive correlation was observed between IMA-s values and IOP on the 1stand 3rddays(r=0.398,P=0.04 and r=0.382,P=0.04,respectively).There was no correlation between IMA-s levels and increased IOP on the 10thday after IOP increase(r=0.026,P=0.902).CONCLUSION:IMA may be an important indicator of acute damage caused by diseases involving ischemic damage to the eye,especially in case of increased intraocular pressure.

Ischemia Modified Albumin and C-Reactive Protein in Children with β-Thalassemia Major

Background: Beta-thalassemia is a hereditary haemoglobinopathy caused by defective hemoglobin (Hb) β-globin synthesis, leading to excess α-globin chains that cause hemolysis and impair erythropoiesis. Ischemia modified albumin (IMA) is not a signal protein and not generated in pro-inflammatory state alone but rather an end product of oxidative stress. Objectives: The aim of the study was to evaluate ischemia modified albumin (IMA) and C-reactive protein (CRP) in children with β-thalassemia major and its relation to different iron chelators. Patients and Methods: The study was carried on 40 children diagnosed as beta-thalassemia major recruited from the outpatient clinic and the pediatric department, at Al-Zahraa University Hospital, Faculty of medicine for Girls, Al-Azhar University and EL Minia Insurance Hospital. They were 20 male and 20 female, aged from 4 - 11 years. Another 40 apparently healthy children age and sex matched as control group. CRP and IMA were determined for all participants. Results: There were significant increases in serum CRP, IMA and ferritin levels in patients group compared to control group. There were significant decreases of IMA and CRP levels of thalassemic patients on chelation deferiprone (DFP) compared to deferasirox (DFX) P-value (<0.01) for each. There was a significant positive correlation between serum ferritin and both CRP and IMA levels in thalassemic children (r = 0.40, p < 0.01), (r = 0.44, p < 0.01) respectively. There was a significant positive correlation between IMA and CRP in beta-thalassemic patients (r = 0.31, p = 0.02). Conclusion: IMA, CRP and Serum ferritin were higher in children with β-thalassemia major than controls. Moreover, IMA and CRP levels in thalassemic children on deferiprone (DFP) were significantly lower compared with children on deferasirox (DFX). So it could be considered as useful markers in the follow up assessment of thalassemic patients for early detection of complications.

Role of Ischemia Modified Albumin in Diagnosis of Pulmonary Embolism

Pulmonary embolism is a common and potentially lethal condition. Clinical signs and symptoms for pulmonary embolism are nonspecific. New and simple tests are therefore needed in order to help in early diagnosis of pulmonary embolism. The aim of this work is to elucidate the role of IMA in the diagnosis of pulmonary embolism. Subjects and Methods: 75 patients with suspected pulmonary embolism and 20 control healthy subjects were included in this study. Measurement of IMA was done in all subjects. Results: The mean values of IMA were statistically significantly higher among the PE patient group (0.43 ± 0.104 ABSU) in comparison with non PE patient group (0.27 ± 0.053 ABSU) and healthy control subjects (0.21 ± 0.080 ABSU). At cut-off value of 0.305 ABSU, IMA had 97.5% sensitivity and 71.42% specificity. The area under the curve was 0.952. The positive predictive value of this cut-off value was 79.59% while the negative predictive value was 96.15%. Conclusions: IMA is a good alternative to D-dimer in the diagnosis and exclusion of PE. Larger studies are needed to augment our results.

Uptake of albumin nanoparticle surface modified with glycyrrhizin by primary cultured rat hepatocytes

AIM: To investigate the uptake difference between bovine serum albumin nanoparticle (BSA-NP) and bovine serum albumin nanoparticles with their surface modified byglycyrrhizin (BSA-NP-GL) and to develop a novel hepatocyte targeting BSA-NP-GL based on active targeting technology mediated by specific binding site of GL on rat cellular membrane. METHODS: Calcein loaded bovine serum albumin nanoparticles (Cal-BSA-NP) were prepared by desolvation process. Glycyrrhizin was conjugated to the surface reactive amino groups (SRAG) of Cal-BSA-NP by sodium periodate oxidization, which resulted in calcein-loaded bovine serum albumin nanoparticles with their surface modified by glycyrrhizin (Cal-BSA-NP-GL). The morphology of the two types of prepared nanoparticles (NP) was observed by transmission electron microscopy. The diameter of NP was measured with a laser particle size analyzer. The interaction between Cal-BSA-NP-GL and primary cultured hepatocytes was studied through cellular uptake experiments. The uptake amount of Cal-BSA-NPGL and Cal-BSA-NP by rat hepatocytes was determinedby fluorospectrophotometry. Uptake characteristics were investigated through experiments of competitive inhibition of specific binding site of GL. RESULTS: Both Cal-BSA-NP-GL and Cal-BSA-NP had regular spherical surfaces. The average diameter of CalBSA-NP-GL and Cal-BSA-NP was 77 and 79 nm respectively. The uptake amount of the two NP by hepatocytes reached its maximum at 2 h after incubation. The uptake amount of Cal-BSA-NP-GL by rat hepatocytes was 4.43-fold higher than that of Cal-BSA-NP. There was a significant difference in the uptake of Cal-BSA-NP-GL and Cal-BSA-NP by hepatocytes (P＜0.01). The uptake of Cal-BSA-NP-GL was inhibited when GL was added previously to isolated rat hepatocytes, and the uptake of Cal-BSA-NP was not affected by GL.CONCLUSION: A binding site of GL is present on the surface of rat hepatocytes, BSA-NP-GL may be internalized via this site by hepatocytes and can be used as a drug carrier for active targeting of delivery drugs to hepatocytes.

Current Problems of the Diagnostics and Treatment of Sepsis and Burn Injuries: The Modified Pathogenetic Concept

Background: The deep understanding of pathogenesis is a key moment in the formation of the modern strategy of modern medicine. We conducted the thorough analysis of the microscopic processes occurring in the bodies of patients with purulent-septic complications. The modified pathogenetic concept of the diagnostic and treatment model of diseases with septic complications is presented. The obtained information about the mechanisms of origin and development of these diseases is fundamentally important for finding the modern effective methods of treating patients. The aim of the research is to modify treatment tactics for patients with sepsis and burn injuries based on the modified pathogenetic concept using modern diagnostics, i.e. the method of fluorescence spectroscopy (MFS) and biomarkers. Materials and Methods: The proposed modified pathogenetic concept of the diagnostic and treatment model of diseases with purulent-septic complications along with standard methods was used successfully for effective treatment of 15 patients with sepsis and 25 with burn injuries. Results: 3 main scenarios of behaviour of spectral-fluorescence characteristics of patients with sepsis are illustrated. Spectral-fluorescence markers of sepsis were studied, which are informative 24 to 48 hours before the appearance of obvious clinical and laboratory signs of significant changes in the general somatic status of patients. Conclusions: The proposed diagnostic and therapeutic approach is new and fundamentally important for diagnostics and monitoring of the process of treatment of patients with purulent-septic diseases and burn injuries. An in-depth understanding of the dynamics of septic complications and the corresponding changes of the main markers of these diseases during treatment is especially relevant. The use of infusion therapy with solutions of donor albumin as an effective pathogenetic treatment is scientifically justified.

Modified Child-Pugh grade vs albumin-bilirubin grade for predicting prognosis of hepatocellular carcinoma patients after hepatectomy

BACKGROUND Hepatectomy is the main treatment for patients with hepatocellular carcinoma(HCC)and it has a high possibility for long-term cure potential.But the postoperative mortality and recurrence rates remain high.Since the long-term prognosis of HCC patients is strongly linked to liver function,preoperative assessment of liver function is very important for HCC patients.AIM To compare the predictive power of the modified Child-Pugh(MCP)and albumin-bilirubin(ALBI)grades for the long-term outcome of HCC.METHODS From January 2010 to June 2017,a total of 204 patients with HCC who underwent surgery at the Second Affiliated Hospital of Chongqing Medical University were enrolled in this retrospective study.Multivariate Cox regression analysis was used to determine the independent predictive factors of survival and relapse.The area under the curve(AUC)was used to evaluate the discriminative performance of the MCP grade and ALBI grade to predict the postoperative overall survival(OS)time and recurrence-free survival(RFS)time.RESULTS The median OS and RFS times were 44.0 mo(range:22.0-74.0 mo)and 22.0 mo(range:5.0-45.0 mo),respectively.The median OS and RFS times of MCP grades 1,2,and 3 patients were 60.0,39.0,and 18.0 mo(P<0.001)and 36.0,15.0,and 7.0 mo(P<0.001),respectively.The median OS and RFS times of ALBI grades 1,2,and 3 patients were 56.0,26.0,and 6.0 mo(P<0.001)and 25.0,10.0,and 3.0 mo(P=0.003),respectively.Both the MCP and ALBI grades were more accurate than the Child-Pugh grade for predicting long-term prognosis.Further analysis demonstrated that for both predicting OS and RFS,the MCP grade performed better than the ALBI grade(AUC:0.642 vs 0.605 for OS;0.659 vs 0.594 for RFS).CONCLUSION The MCP grade is more accurate than the ALBI grade for predicting long-term outcome of patients with HCC.

Electrochemical behaviors of lomefloxacin at a single-wall carbon nanotube-modified electrode and its interaction with bovine serum albumin

The electrochemical behaviors of lomefloxacin at a single-wall carbon nanotube-modified glassy carbon electrode have been investigated by cyclic voltammetry.In a Britton-Robinson buffer (pH 4.5),lomefloxacin yields a sensitive and well-defined oxidation peak at ca.1.24 V (vs.SCE) on the modified electrode.Compared with the bare glassy carbon electrode,the oxidation peak current of lomefloxacin significantly increases and the oxidation peak potential positively shifts.Under the optimal conditions,the interaction of lomefloxacin with bovine serum albumin is also investigated.The results indicate that an electrochemically inactive supramolecular complex is formed and the formation of complex between lomefloxacin and bovine serum albumin is an intercalation mechanism.The proposed methods offer a reference for the studies on the biological effects and action mechanism of lomefloxacin with albumins in vivo.

Neuroprotective effect of Angiopep-2 peptide modified scutellarin-loaded PEGylated PAMAM dendrimer nanoparticles on ischemic stroke by modulating the Toll-like receptors-dependent MyD88/IKK/NF-κB signaling pathway

OBJECTIVE The greatest challenge in chemotherapy of ischemic stroke is the construction a suitable delivery system to overcome the poor physicochemical properties of drug and its low permeability across the blood brain barrier(BBB).METHODS In the present study,dendrimer,polyamidoamine(PAMAM),was synthesized as the nano-drug carriers.Angiopep-2,which has been proved excellent ability to cross the BBB,was exploited as the targeting ligand to conjugate PAMAM via bifunctional polyethylene glycol(PEG).Then scutellarin(STA)was encapsulated into the functionalized nanoparticles(NPs)to formulate Angiopep-2 modified STA-loaded PEG-PAMAM NPs.Ischemic stroke model was established to evaluate the treatment efficacy and protective mechanism of Angiopep-2-STA-PEG-PAMAM NPs.RESULTS The pharmacokinetics and biodistribu-tion demonstrated that Angiopep-2-STA-PEG-PAMAM NPs exhibited significantly higher plasma concentration from 1 h to 10 h after intravenous administration and improve accumulation in brain(4.7-fold)compared with STA solution.Moreover,prolonged elimination half-life(4.8-fold)and lower clearance(3.4-fold)were observed.The brain uptake study of 6-coumarin confirmed that Angiopep-2-PEG-PAMAM NPs possessed better brain targeting efficacy(3.2-fold)than PEG-PAMAM NPs.Angiopep-2-STA-PEG-PAMAM NPs obviously ameliorated infarct volume,neurological deficit,histopathological severity and neuronal apoptosis.In addition,Angiopep-2-STA-PEG-PAMAM NPs markedly inhibited the calcium content and the levels of IL-12p40,IL-13,IL-17 and IL-23.Furthermore,Angiopep-2-STA-PEG-PAMAM NPs significantly decreased the m RNA and protein expressions of HMGB1,TLR2,TLR4,TLR5,My D88,TRIF,TRAM,IRAK-4,TRAF6,IкBα,IKKβand NF-кBp65.CONCLUSION The results suggested that Angiopep-2modified scutellarin-loaded PEG-PAMAM nanocarriers possessed remarkable neuroprotective effects on ischemic stroke through modulation of inflammatory cascades and HMGB1/TLRs/MyD 88-induced NF-κB activation pathways.

基于转录组测序探讨加味桃红四物汤缓解大鼠心肌缺血再灌注损伤的作用机制

目的 基于转录组测序研究加味桃红四物汤对大鼠心肌缺血再灌注损伤的影响及作用机制。方法 将15只SPF级大鼠随机分为假手术组、模型组和加味桃红四物汤组,每组5只,加味桃红四物汤组予加味桃红四物汤预灌胃5 d,假手术组和模型组灌胃等体积蒸馏水,建立心肌缺血再灌注损伤大鼠模型。心脏超声检测大鼠心功能,试剂盒检测血清氧化应激和炎症因子含量,TUNEL染色检测心肌细胞凋亡,取心肌组织进行转录组测序,对差异基因进行韦恩图及热图分析,对共同差异基因进行GO功能分析和KEGG通路富集分析。RT-qPCR验证差异基因PTX3和EGR2表达。结果 与假手术组比较,模型组大鼠射血分数(EF)和短轴缩短率(FS)明显降低(P<0.01),心肌组织细胞凋亡率及血清乳酸脱氢酶(LDH)、肿瘤坏死因子(TNF)-α、白细胞介素(IL)-1β、IL-6含量明显升高(P<0.01),SOD活性和IL-10含量明显降低(P<0.01);与模型组比较,加味桃红四物汤组大鼠EF和FS明显升高(P<0.05),心肌组织细胞凋亡率及血清肌酸激酶同工酶、LDH、TNF-α、IL-1β、IL-6含量明显降低(P<0.01),SOD活性和IL-10含量明显升高(P<0.01)。转录组测序得到假手术组与模型组差异基因4 227个(2 259个上调、1 968个下调),假手术组与加味桃红四物汤组差异基因1 933个(1301个上调、632个下调),模型组与加味桃红四物汤组差异基因94个(46个上调、48个下调),3组共同差异基因35个,差异基因主要富集到流体剪切力和动脉粥样硬化、泛素介导的蛋白质降解、C型凝集素受体信号通路、鞘脂类信号通路、细胞周期、趋化因子信号通路、脂质和动脉粥样硬化等信号通路。RT-qPCR验证结果显示,模型组心肌组织PTX3和EGR2基因表达较假手术组明显升高(P<0.01),加味桃红四物汤组PTX3和EGR2基因表达较模型组明显降低(P<0.01)。结论 加味桃红四物汤对心肌缺血再灌注损伤具有缓解作用,表现为改善模型大鼠心功能、减少细胞凋亡和炎症因子释放及减轻氧化应激水平,其机制可能与调控PTX3和EGR2基因表达有关。

缺血修饰白蛋白与心脏型脂肪酸结合蛋白联合检测对不典型急性心肌梗死患者的早期诊断价值

目的:探讨缺血修饰白蛋白(IMA)与心脏型脂肪酸结合蛋白(H-FABP)联合检测对不典型急性心肌梗死(AMI)患者的早期诊断价值。方法:选择2021年1月—2022年6月湖南中医药高等专科学校附属第一医院收治的发病6 h内的176例可疑AMI患者作为研究对象,依照临床最终诊断结果将其分为有胸痛AMI组90例、无胸痛AMI组32例、非AMI组54例。选择同期在医院体检的30名健康者作为健康对照组。测定各组研究对象H-FABP、IMA、肌钙蛋白I(c TnI)及肌酸激酶同工酶(CK-MB)含量,计算H-FABP、IMA、H-FABP+IMA、cTnI、CK-MB对无胸痛AMI组患者的诊断性试验评价指标。结果:有胸痛AMI组及无胸痛AMI组患者IMA、H-FABP、cTnI、CK-MB水平均高于非AMI组患者及健康对照组研究对象,差异均有统计学意义(F=7.362、12.275、8.938、3.294、8.729、16.736、10.283、5.726,P<0.05);有胸痛AMI组患者与无胸痛AMI组患者IMA、H-FABP、cTnI、CK-MB水平比较,差异均无统计学意义(t=2.428、1.594、2.875、3.179,P>0.05)。IMA联合H-FABP检测诊断无胸痛AMI组患者的灵敏度、特异度、阳性预测值、阴性预测值、诊断效率均高于IMA、H-FABP、cTnI、CK-MB单独检测数据,差异均有统计学意义(χ^(2)=12.328、16.972、9.375、11.547,P<0.05)。结论:IMA与H-FABP联合检测对不典型AMI患者的早期诊断具有较高的临床价值。

FGF−21、IMA、MCP−1与急性心肌梗死患者预后的关系

目的 研究成纤维细胞生长因子-21 (fibroblast growth factor 21,FGF-21)、缺血修饰白蛋白(ischemia modified albumin,IMA)、单核细胞趋化蛋白-1 (monocyte chemotactic protein-1,MCP-1)与急性心肌梗死(acute myocardial Infarction,AMI)患者预后的关系。方法 选择本院2017年5月-2020年7月诊治的110例AMI患者,根据患者预后情况分为预后不良组和预后良好组,收集患者临床资料,分析其血清FGF-21、IMA、MCP-1水平与AMI患者预后的关系以及诊断主要不良心血管事件(major adverse cardiovascular event,MACE)发生的效能。结果 预后良好组患者血清FGF-21、IMA、MCP-1水平低于预后不良组,差异有统计学意义(P<0.05);血清FGF-21、IMA、MCP-1水平3者联合预测预后的ROC曲线下面积(area under curve,AUC)以及敏感度最高(P<0.05);不同血清FGF-21、IMA、MCP-1水平患者MACE发生率比较,差异有统计学意义(P<0.05);Cox单因素以及多因素分析结果显示,FGF-21>150.12 ng/L、IMA> 75.78 U/mL、MCP-1> 49.67 pg/mL、肌酸激酶-同工酶(CK-MB)> 35 U/L以及心肌肌钙蛋白Ⅰ(cTnⅠ)> 75.78 U/mL均是影响AMI患者预后不良的独立危险因素(P<0.05)。结论 血清FGF-21、IMA、MCP-1水平均可较好地预测AMI患者预后不良的发生,且三者联合预测效能更高,同时血清FGF-21、IMA、MCP-1水平增高与MACE的发生密切相关,是AMI患者预后不良的危险因素。

血清IMA、hs-CRP、PTX3与AMI患者病情程度的关系及对PCI术后短期内发生MACE的预测价值

目的探讨血清缺血修饰清蛋白(IMA)、超敏C反应蛋白(hs-CRP)、正五聚蛋白3(PTX3)与急性心肌梗死(AMI)患者病情程度的关系及对经皮冠状动脉介入(PCI)术后短期内发生主要不良心血管事件(MACE)的预测效能。方法选取2021年1月至2023年1月该院收治的93例AMI患者纳入AMI组,另选取同期93例健康体检者纳入健康对照组。比较两组研究对象及不同预后患者血清IMA、hs-CRP、PTX3水平,分析血清IMA、hs-CRP、PTX3与冠状动脉病变支数、心电图QRS积分、KilliP分级的相关性及对预后的预测价值。结果入院时,AMI组血清IMA、hs-CRP、PTX3水平均明显高于健康对照组(P<0.05);不同病变支数、心电图QRS积分、KilliP分级患者血清IMA、hs-CRP、PTX3水平比较,差异均有统计学意义(P<0.05);血清IMA、hs-CRP、PTX3水平与病变支数、心电图QRS积分及KilliP分级均呈正相关(P<0.05);术后6个月,根据AMI患者是否发生MACE分为MACE组(20例)和非MACE组(73例)。术后1 d,MACE组患者血清IMA、hs-CRP、PTX3水平均高于非MACE组患者(P<0.05);血清IMA、hs-CRP、PTX3单独预测PCI术后发生MACE的曲线下面积(AUC)分别为0.707、0.792、0.782,最佳截断值为95.44 U/mL、21.74 mg/L、3.27 ng/mL;联合预测的特异度为85.00%,灵敏度为95.89%,AUC为0.935(95%CI:0.864~0.975),大于各指标单独预测的AUC(P<0.05)。结论AMI患者血清IMA、hs-CRP、PTX3水平异常升高,3项指标不仅与病情程度密切相关,还可增加PCI术后MACE发生风险,早期联合检测可作为临床评估病情及判断预后的重要生化标志物。

加味四妙勇安汤抗大鼠心肌缺血再灌注损伤作用及机制初探

目的该研究旨在初步探讨加味四妙勇安汤对大鼠心肌缺血再灌注损伤的影响及其机制。方法首先构建大鼠心肌缺血再灌注损伤模型,随机分为正常对照组、模型组、NLRP3抑制剂(MCC950)组、四妙勇安汤组及加味四妙勇安汤组。分别检测心脏超声,血清肌酸激酶同工酶(CK-MB)及高敏C反应蛋白(hs-CRP),血浆D-二聚体,血清NLRP3炎症相关因子caspase-1、IL-1β、IL-18含量的变化。通过HE、马松染色观察心肌病理变化及胶原纤维含量;采用TUNEL法检测心肌细胞凋亡;免疫组织化学法检测炎症通路相关基因阳性表达。结果与正常对照组比较,模型组大鼠左室射血分数(LVEF)、左心室短轴缩短率(LVFS)、左室心输出量(LVCO)、左室舒张末期前壁厚度(LVAWd)、左室收缩末期前壁厚度(LVAWs)明显降低(P<0.05);与模型组比较,给药组大鼠LVEF、LVFS、LVCO、LVAWs、LVAWd均升高。此外与模型组相比,给药组显著降低血清心肌酶CK-MB、炎症因子hs-CRP以及血浆D-二聚体含量(P<0.05),降低血清NLRP3通路相关炎症因子caspase-1、IL-1β、IL-18含量(P<0.05);TUNEL检测细胞凋亡结果提示,与正常对照组相比,模型组细胞凋亡显著增加(P<0.05),给药组均可明显减少心肌细胞凋亡(P<0.05)。心肌组织HE染色提示正常组大鼠心肌结构与形态均好,心肌纤维排列有序,模型组大鼠表现出急性损伤心肌坏死、中性粒细胞浸润和间质水肿,而经药物干预后的心肌纤维排列、中性粒细胞浸润和间质水肿均较模型组改善。马松染色表明正常对照组无明显胶原纤维沉积,模型组胶原纤维沉积显著增加(P<0.05),药物干预后心肌胶原纤维沉积较模型组显著减少(P<0.05)。免疫组化结果提示,NLRP3、caspase-1、IL-1β蛋白在心肌细胞质呈黄色或棕黄色为阳性表达,与正常对照组比较,模型组NLRP3、caspase-1、IL-1β蛋白表达明显增加(P<0.05),药物干预后阳性细胞表达明显降低(P<0.05)。结论加味四妙勇安汤具有保护大鼠心肌缺血再灌注损伤的作用,表现为改善大鼠心功能、缓解炎症反应、改善血液高凝状态、改善心肌损伤、减少细胞凋亡及胶原纤维沉积等,其机制可能与抑制NLRP3炎症通路的激活有关。且与单纯四妙勇安汤比较,加味四妙勇安汤在改善心功能、减轻细胞凋亡等方面更具优势。

IMA和CK指数在急性缺血性脑卒中的辅助诊断价值

目的探讨缺血修饰白蛋白(IMA)和肌酸激酶(CK)指数在急性缺血性脑卒中(AIS)中的诊断价值。方法依据纳入和排除标准,纳入2021年10月至2022年10月在河南省人民医院住院的AIS患者149例作为AIS组。另选取同期健康体检者156例作为健康对照组。使用雅培C1600生化分析仪测量IMA、CK、肌酸激酶同工酶(CK-MB)、乳酸脱氢酶(LDH)和α-羟基丁酸脱氢酶(HBDH)的活性水平,计算CK指数(CK-MB与CK之比)。分析相对危险因素,构建受试者工作特征(ROC)曲线,使用SPSS 27.0.1进行数据分析,GraphPad Prism 9.4.1绘制图表,使用MedCalc(20.0.22版本)比较曲线下面积(AUC)的差异。结果AIS组IMA、CK-MB、CK指数显著高于健康对照组,CK水平显著低于健康对照组,差异有统计学意义(均P<0.05)。单因素Logistic回归分析显示IMA和CK指数都是AIS的危险因素(均P<0.001)。采用多因素二元Logistic回归分析调整性别和年龄后,IMA成为AIS的独立危险因素(OR=1.901,95%CI:1.649~2.190,P<0.001)。ROC曲线显示,单项检测IMA的AUC为0.922,灵敏度、特异度为81.2%、90.4%;与IMA+CK指数或IMA+CK指数+CK联合检测相比,差异无统计学意义(P>0.05)。结论IMA是AIS的独立危险因素,具有较强的诊断价值,值得临床推广应用。

血清IMA、Hcy水平对缺血性脑白质病变诊断及评估病情的价值

目的研究血清缺血修饰白蛋白(IMA)、同型半胱氨酸(Hcy)水平与缺血性脑白质病变(WMIL)发病及病情的关系。方法选择2020年3月—2022年6月期间在我院经头部磁共振确诊为WMIL的89例患者作为WMIL组,选择同期头部磁共振结果正常、性别及年龄与WMIL患者匹配的志愿者作为对照组,比较2组间一般资料、实验室指标的差异,评价WMIL的病情并分为轻度和中重度。采用Logistic回归分析WMIL发病及严重程度的影响因素,采用ROC曲线分析血清IMA、Hcy水平对WMIL的诊断价值。结果WMIL组高血压比例、2型糖尿病比例、尿酸(UA)、IMA、Hcy水平均高于对照组(P<0.05);WMIL组中重度患者高血压比例、2型糖尿病比例、IMA、Hcy水平均高于对照组,高密度脂蛋白胆固醇(HDL-C)水平低于对照组(P<0.05);Logistic回归分析显示,高血压、IMA水平升高、Hcy水平升高是WMIL发病的影响因素(P<0.05),高血压、IMA水平升高、Hcy水平升高是WMIL病情严重程度加重的影响因素(P<0.05);ROC曲线分析显示,血清IMA、Hcy对WMIL及中重度WMIL具有诊断价值。结论血清IMA、Hcy升高与WMIL发病及病情加重相关,检测血清IMA、Hcy水平对WMIL及中重度WMIL具有诊断价值。

脐动脉血缺血修饰白蛋白联合血气分析对新生儿轻度窒息后心脏损害的预测价值

目的 探讨脐动脉血气分析联合脐动脉血缺血修饰白蛋白(ischemia-modified albumin,IMA)水平检测对新生儿轻度窒息后心脏损害的预测价值。方法 以2022年1月至2023年3月于江苏省阜宁县人民医院分娩的68例轻度窒息新生儿为研究对象,符合方案者65例,根据是否发生心脏损害,分为非心脏损害组(39例)及心脏损害组(26例)。全部研究对象均在分娩现场进行脐动脉血气分析,同时留取脐动脉血,测定IMA、肌酸激酶同工酶(creatine kinase isoenzyme,CK-MB)及高敏肌钙蛋白I(high-sensitivity troponin I,hsTnI)水平。应用SPSS 25.0软件对数据进行统计分析,并绘制受试者操作特征(receiver operating characteristic,ROC)曲线。结果 心脏损害组脐动脉血气分析指标[酸碱度(pondus hydrogenii,pH)、氧分压(partial pressure of oxygen,PO_(2))、二氧化碳分压(partial pressure of carbon dioxide,PCO_(2))、剩余碱(base excess,BE)、乳酸]及生物标记物(IMA、CK-MB、hsTnI)均显著高于非心脏损害组(P<0.05)。以心脏损害(否=0,是=1)为因变量,上述指标等为协变量,进行多因素Logistic回归分析。结果显示,pH值、PO_(2)及IMA差异有统计学意义(P<0.05)。IMA与pH值呈中度负相关,与PO_(2)呈弱负相关。用于预测新生儿轻度窒息后心脏损害的脐动脉血气pH值、脐动脉血IMA的ROC曲线下面积(area under curve,AUC)、cut-off值、灵敏度、特异度分别为0.840、7.14、96.20%、64.10%,0.893、79.65、73.10%、89.70%。脐动脉血气pH值及脐动脉血IMA二者联合预测新生儿轻度窒息后心脏损害时,AUC、灵敏度和特异度分别为0.927、76.90%、92.30%,优于单一指标。结论 脐动脉血气pH值联合脐动脉血IMA对新生儿轻度窒息后的心脏损害具有良好的预测价值,且方便、快捷,可考虑作为新生儿轻度窒息后心脏损害的临床早期诊断依据,具有潜在的临床应用价值。

血清D-二聚体、乳酸脱氢酶及缺血修饰白蛋白检测在肺癌术后急性肺栓塞中的临床意义

目的 探讨血清D-二聚体(D-D)、乳酸脱氢酶(LDH)及缺血修饰白蛋白(IMA)检测在肺癌术后急性肺栓塞(APE)中的临床意义。方法 选取125例行手术治疗的肺癌患者作为观察组,另选取113例健康者作为对照组。比较两组患者血清D-D、LDH及IMA水平。根据肺癌术后是否发生APE将观察组患者分为APE组30例及未APE组95例,比较两组患者的临床特征。采用多元Logistic回归分析对肺癌患者术后发生APE的影响因素进行分析。比较D-D、LDH、IMA单独及联合检测对肺癌术后APE的诊断效能。结果 观察组患者血清D-D、LDH及IMA水平均明显高于对照组,差异均有统计学意义(P﹤0.01)。APE组和未APE组患者合并基础疾病情况、病理类型、TNM分期和血清D-D、LDH、IMA水平比较,差异均有统计学意义(P﹤0.05)。多元Logistic回归分析结果显示,合并基础疾病、病理类型为腺癌、TNM分期为Ⅲ期、D-D﹥0.50 mg/L、LDH﹤109 U/L或﹥245 U/L、IMA﹥0.29 ABSU均是肺癌术后发生APE的危险因素(P﹤0.05)。D-D、LDH、IMA三者联合检测诊断肺癌术后发生APE的灵敏度、特异度及准确度分别为93.33%、95.79%及95.20%,均高于三者单独检测。结论 血清D-D、LDH及IMA检测对于肺癌术后APE的诊断具有一定的临床意义,三者联合检测对肺癌术后APE的诊断效能更高,对于临床治疗具有重要意义。

缺血修饰白蛋白、C反应蛋白、脂肪酶、淀粉酶水平与急性胰腺炎病情严重程度的相关性分析

目的:分析缺血修饰白蛋白(IMA)、C反应蛋白(CRP)、脂肪酶、淀粉酶水平与急性胰腺炎(AP)病情严重程度的相关性。方法:选取2022年6月—2023年5月内蒙古科技大学包头医学院第一附属医院急诊医学科收治的120例AP患者作为AP组,根据病情严重程度分为轻度组、中度组、重度组,各40例;选取同期该院急诊医学科收治其他非缺血性腹痛患者30例作为对照组。检测患者血清IMA、CRP、脂肪酶及淀粉酶水平,分析IMA、CRP、脂肪酶、淀粉酶水平与AP病情严重程度的相关性。结果:AP组CRP、脂肪酶、淀粉酶、IMA水平均高于对照组(P<0.05)。CRP、脂肪酶、淀粉酶水平比较,轻度组<重度组<中度组,IMA水平比较,轻度组<中度组<重度组,差异有统计学意义(P<0.05)。CRP、淀粉酶、IMA水平与AP病情严重程度呈正相关(P<0.05);脂肪酶与AP病情严重程度关系不明显(P>0.05)。结论:血清IMA、CRP、脂肪酶、淀粉酶与AP发生发展密切相关,且IMA水平与AP病情严重程度相关,有望成为诊断AP的敏感生物标志物。

人源化基因修饰猪血红细胞常温机械灌注技术对人断肢的保护作用

目的探讨人源化基因修饰猪血红细胞常温机械灌注对人离断肢体的保存作用。方法采用人源化基因修饰猪血红细胞灌注人离断肢体6 h。每小时取灌注液检测血氧分压、Na^(+)、K^(+)、Ca^(2+)、pH值、葡萄糖、乳酸及肌酸激酶水平,取浅层屈肌检测肿瘤坏死因子(TNF)-α、白细胞介素(IL)-2、IL-1变化。灌注0 h、6 h取适量前臂浅层屈肌,进行病理学检查,观察骨骼肌细胞间隙及糖原消耗情况。每2 h取适量前臂血管,检测血管内皮细胞凋亡情况。灌注开始前及灌注6 h行X线造影,观察指端末梢血管充盈度。结果灌注过程中氧分压处于正常范围。Na^(+)在1 h出现高峰,达到138.7 mmol/L,之后波动于正常范围;K^(+)在2 h出现高峰,为6.08 mmol/L,之后下降,波动于正常范围;Ca^(2+)在4 h达高峰,为1.03 mmol/L。葡萄糖在灌注开始时逐渐降低,灌注2 h时达最低值17.7 mmol/L,之后维持动态平衡。pH值在灌注6 h降低为7.28,乳酸水平在灌注1 h时升高,达到9.6 mmol/L,之后逐渐呈下降趋势。肌酸激酶水平从灌注开始升高,于2 h到达高峰,为20030 U/L,之后下降,在灌注结束时保持稳定。灌注结束肌纤维形态正常,肌纤维间隙略有增大,骨骼肌糖原未见明显蓄积。灌注0 h时血管内皮凋亡细胞数量较多,6 h时凋亡细胞数量减少。灌注0 h时血管充盈明显,6 h时指间部分血管充盈程度减低。结论人源化基因修饰猪血红细胞常温机械灌注人断肢能持续稳定的供能供氧,保持灌注液离子酸碱度平衡,维持细胞正常代谢,对离断肢体有一定保护作用。

基于临床症状和血清学指标构建的急性肺栓塞筛查模型

目的 分析急性肺栓塞(APE)患者血清学指标并构建APE筛查模型。方法 回顾性选择2022年2月至2023年9月在杭州市富阳区第一人民医院疑诊为APE的患者100例,根据CT肺血管造影结果分为观察组41例和对照组59例,比较两组患者一般资料,血缺血修饰白蛋白(IMA)、D-二聚体、同型半胱氨酸(Hcy)和动脉血氧分压水平,采用多因素logistic回归分析APE的独立影响因素,建立APE筛查模型,采用ROC曲线评价APE筛查模型的诊断效能。结果 观察组患者呼吸困难、制动、下肢静脉血栓比例,血IMA、D-二聚体、Hcy水平高于对照组,差异均有统计学意义(均P<0.05)。多因素logistic回归分析显示,呼吸困难、制动、下肢静脉血栓、血IMA、D-二聚体和Hcy均是APE的独立影响因素(均P<0.05)。ROC曲线结果显示APE筛查模型的诊断效能较高(AUC=0.945,95%CI:0.894~0.996,P<0.05),最佳阈值为43.5分,APE筛查模型的灵敏度、特异度、阳性预测值、阴性预测值分别为0.966、0.854、0.946、0.905。结论 本研究构建的APE筛查模型预测能力较好,有待临床进一步验证。