植物多糖对家兔动脉粥样硬化脂质过氧化及炎症反应的干预

目的:探讨枸杞多糖、黄芪多糖对家兔动脉粥样硬化(As)脂质过氧化及炎症反应的干预机制。方法:将48只雄性新西兰大白兔随机分为4组:正常组(12只),As模型组(12只),枸杞多糖(LBP)治疗组和黄芪多糖(APS)治疗组。10周后,测定各组空腹甘油三酯(TG)、总胆固醇(TCh)、高密度脂蛋白胆固醇(HDL-C)、一氧化氮(NO)、丙二醛(MDA)、C反应蛋白(CRP)、内皮素-1(ET-1)的含量以及超氧化物歧化酶(SOD)活性,并计算HDL-C/TCh,同时计算主动脉内膜粥样斑块面积。结果:模型组与正常组比较,TG、TCh、ET-1、NO、CRP、MDA明显升高(P<0.01),HDL-C/TCh、SOD活性明显下降(P<0.01),主动脉内膜粥样斑块面积较大;而LBP和APS治疗组与模型组比较,TG、ET-1、NO、CRP明显下降(P<0.01),HDL-C/TCh和SOD活性明显升高(P<0.01),主动脉内膜粥样斑块面积明显减少(P<0.01)。结论:枸杞多糖和黄芪多糖对动脉粥样硬化有明显的预防和治疗作用,机制可能与降低血脂、抗氧化、调节免疫等功能有关。     

Impact of pathological response after preoperative transcatheter arterial chemoembolization (TACE) on incidences of microvascular invasion and early tumor recurrence in hepatocellular carcinoma: a multicenter propensity score matching analysis

BackgroundTo study the influence of pathological responses (PR) after transcatheter arterial chemoembolization (TACE) on incidences of microvascular invasion (MVI) and early recurrence in hepatocellular carcinoma (HCC) patients.MethodsBetween 2013 to 2015, consecutive HCC patients who underwent liver resection with “curative” intent at three hospitals were enrolled in this study. Patients with different areas of PR after preoperative TACE were compared with those without preoperative TACE on the incidences of MVI, early recurrence rates and patterns of recurrence before and after propensity score matching (PSM).ResultsOf 1,970 patients, 737 patients who received preoperative TACE were divided into three groups according to the areas of PR: ≥90% (n=226), 60–90% (n=447), and <60% (n=64). PR ≥90% was an independent protective factor of incidences of MVI [odds ratio (OR), 0.144; 95% confidence interval (CI), 0.082–0.245, P<0.001) and early recurrence (HR, 0.742; 95% CI, 0.561–0.963, P=0.032); while PR<60% was an independent risk factor of incidences of MVI (OR, 6.076; 95% CI, 3.004–11.728, P<0.001) and early recurrence (HR, 1.428; 95% CI, 1.095–1.929; P=0.009). Furthermore, patients with PR <60% were significantly more likely to develop multiple intrahepatic recurrences involving multiple hepatic segments when compared with patients without preoperative TACE.ConclusionsThis study indicated the area of PR after TACE was closely associated with the incidences of MVI and early tumor recurrence. Patients with PR <60% were at significantly higher risks of having more MVI, early and multiple tumor recurrences     

The kinase p38α functions in dendritic cells to regulate Th2-cell differentiation and allergic inflammation

Dendritic cells (DCs) play a critical role in controlling T helper 2 (Th2) cell-dependent diseases, but the signaling mechanism that triggers this function is not fully understood. We showed that p38α activity in DCs was decreased upon HDM stimulation and dynamically regulated by both extrinsic signals and Th2-instructive cytokines. p38α-specific deletion in cDC1s but not in cDC2s or macrophages promoted Th2 responses under HDM stimulation. Further study showed that p38α in cDC1s regulated Th2-cell differentiation by modulating the MK2−c-FOS−IL-12 axis. Importantly, crosstalk between p38α-dependent DCs and Th2 cells occurred during the sensitization phase, not the effector phase, and was conserved between mice and humans. Our results identify p38α signaling as a central pathway in DCs that integrates allergic and parasitic instructive signals with Th2-instructive cytokines from the microenvironment to regulate Th2-cell differentiation and function, and this finding may offer a novel strategy for the treatment of allergic diseases and parasitic infection.     

白塞综合征20例临床特征及心血管影像学分析

回顾性分析2018年1月—2020年8月首都医科大学附属北京安贞医院风湿免疫科治疗的白塞综合征患者20例的临床及影像学检查资料.20例患者中,男4例,女16例,平均年龄41.2岁,平均病程17.0年.超声、CT及MR检查发现心血管系统受累13例,主要表现为主动脉瓣脱垂并重度关闭不全,主动脉瘤、主动脉假性动脉瘤、主动脉溃...     

青藤碱渗透不同动物皮肤的行为研究

目的 :建立青藤碱的透皮吸收研究方法 ,比较青藤碱渗透小鼠皮肤、裸鼠皮肤、家兔皮肤、大鼠皮肤、猪耳皮肤及人体皮肤的透皮吸收行为。方法 :青藤碱的含量测定采用HPLC法 ,计算透皮速率常数J,比较青藤碱渗透上述 6种实验皮肤的透皮速率常数。结果 :青藤碱透过 6种皮肤的透皮速率常数分别为 46 6 7± 16 35、40 34± 8 40、17 6 0± 9 46、2 3 71± 8 79、44 5 6± 11 2 7、38 33± 13 81。结论 :青藤碱对 6种皮肤的渗透性 ,以裸鼠及猪耳皮肤的透皮速率常数与人体皮肤较为接近。     

子宫内膜癌磁共振成像诊断和分期

回顾性分析子宫内膜癌的磁共振（MRI）表现和手术病理结果，探讨MRI诊断和分期的价值。材料和方法：18例子宫内膜癌诊断和分期均经手术和病理检查。术前MRI检查采取冠状面和矢状面的T1WI和T2WI成像，双盲法MRI阅片，子宫内膜癌MRI分期基本按FIGO分期原则。结果：病灶区在T1WI像上为等信号（不伴出血），T2WI呈现5种表现。MRI分期准确率达83．8％，分辨工期的准确率达90．9％。结论：子宫内膜癌MRI表现多样化，有44．4％病例表现不典型。MRI对子宫内膜癌（尤其对占多数的Ⅰ期病例）的分期具有很高的价值。     

肺岩宁方对ILK基因沉默后转染人肺癌A549细胞相关基因表达的影响

目的:探讨整合素连接激酶(ILK)基因沉默后及中药肺岩宁方对相关下游靶基因表达的影响。方法:构建载体转染人肺腺癌细胞A549后,随机分为阴性对照病毒感染细胞(NC)组、RNAi靶点病毒感染细胞(KD)组、10%肺岩宁含药血清干预的NC组与KD组、20%肺岩宁含药血清干预的NC组与KD组,以及阳性对照10%DDP干预的KD组,应用Real time-PCR及Western Blot方法检测下游靶基因蛋白激酶B(Akt/PKB)、糖原合成酶激酶-3β(GSK-3β)、转录因子-1(AP-1)、细胞周期蛋白D1(cyclinD1)、基质金属蛋白酶-9(MMP-9)、血管内皮生长因子(VEGF)、β-链蛋白(β-catenin)的mRNA及蛋白表达水平。结果:与NC组比较,KD组GSK-3β、VEGF mRNA和蛋白表达显著下调(P0.05,P0.01),cyclinD1、MMP-9 mRNA和蛋白表达显著上调(P0.05,P0.01),Akt表达无变化,AP-1与β-catenin在mRNA水平表达升高(P0.01)、蛋白水平表达则下降;与KD组比较,KD+10%肺岩宁含药血清和KD+10%DDP组具有下调VEGF、cyclinD1、MMP-9和β-catenin蛋白表达、上调GSK-3β蛋白表达,以及下调AP-1、cyclinD1 mRNA表达的作用(P0.01);与KD组相比,KD+20%肺岩宁含药血清具有下调AP-1、cyclinD1和MMP-9蛋白表达的作用。结论:沉默ILK基因后可以明显降低GSK-3β、VEGF的表达,10%的中药肺岩宁方含药血清可能通过下调靶基因AP-1、cyclinD1、MMP-9、VEGF和β-catenin蛋白表达的作用而发挥其抗肿瘤的作用。     

Circ_SAR1A regulates the malignant behavior of lung cancer cells via the miR‐21‐5p/TXNIP axis

BackgroundLung cancer is one of the most common malignancies globally and a significant component of cancer‐related deaths. The lack of early diagnosis accounts for detecting approximately 75% of cancer patients at an intermediate to an advanced stage, with a low 5‐year survival rate. Therefore, a more comprehensive understanding of the molecular mechanisms of lung cancer development is necessary to find reliable and effective therapeutic and diagnostic biomarkers.Methodscirc_SAR1A, miR‐21‐5p, and TXNIP in lung cancer tissues, animal xenografts, and cell lines were validated by qRT‐PCR and western blotting analyses. RNase R digestion and nuclear/cytoplasm fractionation experiments were utilized to determine the stability and localization of circ_SAR1A in lung cancer cells. The binding between miR‐21‐5p and circ_SAR1A or TXNIP was confirmed by luciferase reporter, RNA pull‐down, Spearman''s correlation, and rescue assays. CCK‐8, colony formation, flow cytometry, Transwell, and western blotting were utilized to illustrate the malignant behavior of lung cancer cells.Resultscirc_SAR1A and TXNIP were down‐regulated while miR‐21‐5p was up‐regulated in lung cancer samples and cells. circ_SAR1A was located predominantly in the cytoplasm; it inhibited lung cancer growth in vitro and in vivo by sponging to miR‐21‐5p. miR‐21‐5p silencing suppressed lung cancer malignancy by targeting TXNIP.Conclusionscirc_SAR1A is a critical negative regulator of lung carcinogenesis. circ_SAR1A/miR‐21‐5p/TXNIP attenuation inhibited lung cancer progression, presenting an ideal diagnostic and a potential therapeutic target.     

注射海洛因致破伤风的观察与护理

破伤风杆菌是一种厌氧芽孢杆菌,必须通过皮肤或粘膜伤口才能侵入人体,在缺氧环境下才能致病[1].但近年来由于毒品的危害日益严重,注射毒品时因消毒不严或使用不洁注射器而导致破伤风感染已非罕见.三年来我科共收治破伤风15例,其中因注射海洛因引起的占6例,现报告如下.     

A PCR-basedRapidNeutralizationAssay for GII.4 NorovirusInfection in HIEC6CellCulture

Because of limited viral replication and lack of cytopathic effect in cell culture,a new PCR-based rapid seroneutralization assay for detection of GII.4norovirus neutralized antibodies was developed with serum samples from acute-phase patients,convalescent-phase patients and healthy controls.According to this study,neutralizing antibodies were detected in 100% of