简介:摘要患儿 男,3岁9月龄,以“排稀便10个月、间断抽搐4个月”就诊,经乳糜泻抗体、人类白细胞抗原(HLA)-DQ基因检测、十二指肠病理活检明确诊断为乳糜泻,予去麦麸类饮食以及对症营养治疗后好转。随访过程中出现多饮多尿,查血糖明显升高,尿糖、尿酮体阳性,诊断为乳糜泻合并1型糖尿病,给予对症补充胰岛素治疗。随访6年患儿血糖控制平稳,生长发育正常。
简介:摘要目的了解新型狂犬疫苗“2-1-1”接种程序的临床应用效果,为新的接种方法积极推进进行前瞻性研究。方法对本社区2011年10月-2013年12月148例被被狗、猫、鼠等动物咬、抓伤人群进行按照就诊的先后顺序平均分为2组,观察组74例,实施“2-1-1”接种程序;对照组74例实施传统的“五针次法”接种程序。在接种程序中10d和接种程序结束后15d分别对患者进行血清抗狂犬病毒抗体水平进行统计比较,并进一步观察其影响因素。结果观察组与对照患者10d血清抗狂犬病毒抗体阳性率分别为56.76%、12.16%;接种程序完成后15d血清抗狂犬病毒抗体阳性率分别为97.30%、85.14%。抗体转阳率与年龄增长呈负相关。结论“2-1-1”狂犬疫苗接种程序完全符合药物动力学原理,它能迅速提高机体内血药浓度,并在短期内产生抗体,同时也减少患者就诊次数,更加方便患者。但疫苗的接种效果与患者各机体个体差异存在一定的联系,全程接种15d后应加强抗体水平的检测,如抗体阴性患者应积极寻找原因及加强接种。
简介:LFA-1andMac-1,twoβ2integrinmembersconstitutivelyexpressedonneutrophils,mediateleukocyterecruitmentcascadebybindingtothesameligandofICAM-1.TheslowrollingandfirmadhesionofleukocytesrelyonLFA-1whilethecellcrawlingisdependentonMac-1.Wehypothesizedthattheirdistinctroleswerelikelyattributedtothedifferencesinthebindingkineticsorinthediverseresponsesofoutside-inandinside-outsignaling.Inthisstudy,wecomparedtheICAM-1bindingfeaturesbetweensolubleormembrane-expressedLFA-1andMac-1withdifferentaffinityconformationsusingopticaltraptechnique.Ourdataindicatethattheaffinityup-regulationfromwidetype(WT)tohighaffinity(HA)isoff-ratedependentforLFA-1buton-ratedependentforMac-1.Thestructuralbasesofthisnewfindingwerefoundtobeconsistentwithourprevioussimulations.Theseresultsfurtheredourunderstandingontheirfunctiondifferencesundershearflow.
简介:AbstractBackground:Emerging evidence indicates that the sineoculis homeobox homolog 1-eyes absent homolog 1 (SIX1-EYA1) transcriptional complex significantly contributes to the pathogenesis of multiple cancers by mediating the expression of genes involved in different biological processes, such as cell-cycle progression and metastasis. However, the roles of the SIX1-EYA1 transcriptional complex and its targets in colorectal cancer (CRC) are still being investigated. This study aimed to investigate the roles of SIX1-EYA1 in the pathogenesis of CRC, to screen inhibitors disrupting the SIX1-EYA1 interaction and to evaluate the efficiency of small molecules in the inhibition of CRC cell growth.Methods:Real-time quantitative polymerase chain reaction and western blotting were performed to examine gene and protein levels in CRC cells and clinical tissues (collected from CRC patients who underwent surgery in the Department of Integrated Traditional and Western Medicine, West China Hospital of Sichuan University, between 2016 and 2018, n = 24). In vivo immunoprecipitation and in vitro pulldown assays were carried out to determine SIX1-EYA1 interaction. Cell proliferation, cell survival, and cell invasion were determined using the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay, clonogenic assay, and Boyden chamber assay, respectively. The Amplified Luminescent Proximity Homogeneous Assay Screen (AlphaScreen) method was used to obtain small molecules that specifically disrupted SIX1-EYA1 interaction. CRC cells harboring different levels of SIX1/EYA1 were injected into nude mice to establish tumor xenografts, and small molecules were also injected into mice to evaluate their efficiency to inhibit tumor growth.Results:Both SIX1 and EYA1 were overexpressed in CRC cancerous tissues (for SIX1, 7.47 ± 3.54 vs.1.88 ± 0.35, t = 4.92, P = 0.008; for EYA1, 7.61 ± 2.03 vs. 2.22 ± 0.45, t = 6.73, P = 0.005). The SIX1/EYA1 complex could mediate the expression of two important genes including cyclin A1 (CCNA1) and transforming growth factor beta 1 (TGFB1) by binding to the myocyte enhancer factor 3 consensus. Knockdown of both SIX1 and EYA1 could decrease cell proliferation, cell invasion, tumor growth, and in vivo tumor growth (all P < 0.01). Two small molecules, NSC0191 and NSC0933, were obtained using AlphaScreen and they could significantly inhibit the SIX1-EYA1 interaction with a half-maximal inhibitory concentration (IC50) of 12.60 ± 1.15 μmol/L and 83.43 ± 7.24 μmol/L, respectively. Administration of these two compounds could significantly repress the expression of CCNA1 and TGFB1 and inhibit the growth of CRC cells in vitro and in vivo.Conclusions:Overexpression of the SIX1/EYA1 complex transactivated the expression of CCNA1 and TGFB1, causing the pathogenesis of CRC. Pharmacological inhibition of the SIX1-EYA1 interaction with NSC0191 and NSC0933 significantly inhibited CRC cell growth by affecting cell-cycle progression and metastasis.
简介:摘要近年来,程序性死亡因子(PD)-1及PD配体(PD-L)1抑制剂在肿瘤治疗相关研究中的重要性突显。PD-1/PD-L1抑制剂主要通过阻遏PD-1/PD-L1信号通路,解除后者对T细胞的抑制,从而发挥抗肿瘤作用。目前,美国食品与药品监督管理局(FDA)已批准多个PD-1/PD-L1抑制剂用于肿瘤治疗。在肿瘤治疗中,与PD-1/PD-L1抑制剂单药应用相比,PD-1/PD-L1抑制剂与化疗、放疗、靶向治疗等联合应用,已显现出较好的疗效。笔者拟就PD-1/PD-L1抑制剂在实体瘤及血液系统肿瘤治疗中的作用机制及临床应用现状进行阐述,旨在介绍PD-1/PD-L1抑制剂在肿瘤治疗中的应用价值。
简介:摘要目的本文旨在研究SKA1是否是调节肝癌恶性增殖的一个关键分子,并进一步探究其机制,为后续靶向治疗提供分子理论基础。方法通过生物信息学技术分析来自TCGA数据库中的肝癌数据,分析了SKA1在肝癌中的表达量,同时,我们还分析了SKA1的表达与肝癌患者预后的关系。采用基于脂质体介导的细胞转染技术,构建过表达SKA1的肝癌细胞系,并进一步采用CCK-8及平板克隆试验检测SKA1对肝癌细胞增殖能力的影响。采用生物信息学技术对SKA1及E2F1表达相关性进行分析,进一步检测E2F1在SKA1启动子区域的结合位点,并采用双荧光素酶技术检测E2F1对SKA1的转录激活作用。结果SKA1在肝癌组织中高表达,且SKA1高表达的肝癌患者的总体生存率(49.8%)比SKA1低表达患者低(69.4%),二者呈负相关。与此同时,E2F1也在肝癌组织中呈高表达,且E2F1高表达肝癌患者生存期显著低于低表达组,与不良预后呈负相关。SKA1过表达可将肝癌细胞的增殖能力提升近50%,SKA1受E2F1转录因子调控,且E2F1转录因子与SKA1启动子结合,转录激活SKA1在肝癌细胞中的表达。结论E2F1转录激活SKA1促进肝癌细胞增殖,导致肝癌患者预后不良。
简介:摘要目的探讨结直肠癌组织中结肠癌转移相关基因1(MACC1)和Polo样激酶1(PLK1)表达的临床意义。方法收集2016年4月至2021年3月大庆油田总医院资料完整的结104例结直肠癌组织标本及癌旁正常组织标本,采用免疫组织化学法检测各组织中MACC1蛋白和PLK1蛋白表达,采用χ2检验分析评估MACC1和PLK1的表达水平与结直肠癌临床病理因素之间的关系。结果MACC1蛋白在结直肠癌组织中表达率为73.08%(76/104),明显高于癌旁组织中表达率15.39%(16/104),两者差异有统计学意义(χ2=70.165,P<0.01);PLK1蛋白在结直肠癌组织中表达率为57.70%(60/104),明显高于癌旁组织中表达率24.04%(25/104),两者差异有统计学意义(χ2=24.371,P<0.01)。MACC1表达水平与结直肠癌淋巴结转移、浸润深度、TNM分期明显相关(χ2=4.697、6.307、6.899,P<0.05),PLK1表达水平与结直肠癌淋巴结转移、组织学分化程度、TNM分期明显相关(χ2=5.446、5.5076、6.307,P<0.05)。结论MACC1蛋白和PLK1蛋白表达与结直肠癌侵袭和转移密切相关,检测上述两种指标,并与临床指标结合,将能更准确判断结直肠癌生物学行为及预后、并指导临床治疗。
简介:摘要目的探讨程序性死亡配体1(PD-L1)和程序性死亡分子1(PD-1)在合并血吸虫肠病结直肠癌组织中的表达及临床意义。方法收集宣城市人民医院2014—2021年结直肠癌患者手术切除标本134例,其中合并血吸虫肠病74例为病例组,非合并血吸虫肠病60例为对照组。采用免疫组化法检测PD-L1和PD-1在结直肠癌组织中的表达情况,分析组间表达差异及其与各临床病理特征的关系。结果病例组癌细胞PD-L1、癌间质淋巴细胞PD-1阳性表达率分别为55.4%、60.8%,对照组癌细胞PD-L1、癌间质淋巴细胞PD-1阳性表达率分别为35.0%、40.0%,病例组PD-L1、PD-1阳性表达率均高于对照组,差异均有统计学意义(χ2=5.55、5.74,均P < 0.05);病例组PD-L1、PD-1表达与癌淋巴结转移及高TNM分期相关(P < 0.05)。结论PD-L1和PD-1在合并血吸虫肠病结直肠癌组织中高表达,并与其侵袭性行为有相关性,PD-1/PD-L1信号途径可能参与合并血吸虫肠病结直肠癌的发生、发展分子学机制,阻断PD-1/PD-L1信号通路有望成为合并血吸虫肠病结直肠癌免疫治疗的新策略。
简介:摘要回顾性分析105例行手术切除且经病理确诊的胰腺癌患者的临床资料,探讨胰腺癌组织CAMK1、SPHK1的表达与临床病理特征及预后的关系。结果显示,胰腺癌组织CAMK1、SPHK1均呈高表达,其高表达组的临床分期,远处转移及脉管浸润与低表达组比较,差异均有统计学意义,且高表达与患者的总生存期短有关,是影响胰腺癌患者预后的生物学指标。