胶质瘤中hsa＿circ＿0021350的表达情况及临床意义研究

目的 探讨hsa＿circ＿0021350在胶质瘤中的表达及临床意义,初步评价其应用于胶质瘤诊断和治疗的潜力。方法 选择2016年1月至2022年5月在广西医科大学第一附属医院神经外科经手术获取的胶质瘤组织标本40例(高级别胶质瘤22例,低级别胶质瘤18例),正常脑组织标本10例。通过RNase R消化联合逆转录聚合酶链反应(RT-PCR)验证hsa＿circ＿0021350的环状特性。通过TA克隆测序法鉴定实时荧光定量PCR(qRT-PCR)扩增产物。比较高级别胶质瘤、低级别胶质瘤和正常脑组织hsa＿circ＿0021350的表达水平。分析hsa＿circ＿0021350表达与胶质瘤患者临床病理指标的关联性。结果 该研究所设计的发散引物可有效特异扩增hsa＿circ＿0021350。经验证,hsa＿circ＿0021350呈环状,且能耐受RNase R消化。qRT-PCR实验结果显示,高级别胶质瘤和低级别胶质瘤hsa＿circ＿0021350的表达水平均高于正常脑组织,且高级别胶质瘤hsa＿circ＿0021350的表达水平较低级别胶质瘤更高,差异有统计学意义(P<0.05)。...     

2型糖尿病患者外周血hsa＿circ＿0071336表达及临床意义的研究

目的 探讨T2DM患者外周血hsa＿circ＿0071336表达及临床意义。方法 选取2017年5月至2019年8月于首都医科大学附属宣武医院就诊的89例新诊断T2DM患者（T2DM组）、76例IFG患者（IFG组）及83名同期体检健康者（NC组），分析各组hsa＿circ＿0071336表达水平与糖代谢指标的相关性。采用多元线性回归和Logistic回归分析IR、T2DM和IFG的影响因素。受试者工作特征（ROC）曲线评价hsa＿circ＿0071336对鉴别T2DM和IFG的程度。结果 T2DM组BMI、腰高比、WC,SBP、DBP,FPG、HbA1c、FIns、TG、LDL-C,HOMA-IR、TyG、Mets-IR高于NC组（P<0.05）,APN低于NC、IFG组（P<0.05）。Spearman相关分析显示，hsa＿circ＿0071336表达水平与APN呈正相关（P<0.05），与FPG、HbA1c、FIns呈负相关（P<0.05）。多元线性回归分析和Logistic回归分析结果显示，hsa＿circ＿0071336是IR、T2DM和IFG的影响因...     

hsa＿circ＿0000069通过靶向miR-548c-3p调控胃癌细胞增殖、细胞周期和凋亡

目的 研究hsa＿circ＿0000069靶向miR-548c-3p在胃癌进展中的功能。方法 RT-qPCR检测胃癌组织、癌旁组织、胃癌细胞(SNU-1、AGS、HS-746T)、人正常胃黏膜上皮细胞GES1中hsa＿circ＿0000069、miR-548c-3p表达情况。将SNU-1细胞分为对照(NC)组、si-NC组、si-hsa＿circ＿0000069组、miR-NC组、miR-548c-3p组、pcDNA组、pcDNA-hsa＿circ＿0000069组、si-hsa＿circ＿0000069+anti-miR-NC组、si-hsa＿circ＿0000069+anti-miR-548c-3p组。流式细胞术检测细胞凋亡和周期分布；CCK-8法分析细胞活力。hsa＿circ＿0000069和miR-548c-3p的靶向关系通过双荧光素酶报告实验来验证。结果 胃癌组织中hsa＿circ＿0000069表达水平显著高于癌旁组织，miR-548c-3p表达水平显著低于癌旁组织(均P<0.05)。SNU-1、AGS、HS-746T细胞中hsa＿circ＿0000069表达水平显著...     

Hsa＿circ＿0003928在糖尿病足溃疡中的表达及其与病情严重程度及预后的关系

目的 探讨Hsa＿circ＿0003928在糖尿病足溃疡（DFU）中的表达及其与病情严重程度及预后的关系。方法 选取2020年1月至2022年12月于我院内分泌科收治的DFU患者113例,按照感染严重程度分为1级19例（无感染）、2级40例（轻度感染）、3级20例（中度感染）及4级34例（重度感染）。根据DFU患者预后情况分为预后良好组（GP,n=63）和预后不良组（PP,n=50）。比较各组基线资料及IL-6、C-RP、Hsa＿circ＿0003928。Logistic回归分析DFU患者预后不良的影响因素。受试者工作特征（ROC）曲线分析Hsa＿circ＿0003928、C-RP及IL-6预测DFU患者预后不良的价值。结果PP组DFU病程、感染程度3～4级、血肌酐、BUN、血尿酸、C-RP、IL-6及Hsa＿circ＿0003928高于GP组（P<0.05或P<0.01）。3～4级DFU患者Hsa＿circ＿0003928表达高于1～2级（P<0.01）。Logistic回归分析显示,DFU病程长、感染程度3～4级以及BUN、C-RP、IL-6、Hsa＿circ＿0...     

circ＿0016788靶向调控miR-1200抑制肝癌细胞增殖、迁移和侵袭

目的 探讨circ＿0016788影响肝癌细胞增殖、迁移和侵袭的分子机制。方法 选取9例肝癌患者的癌组织及癌旁组织，RT-qPCR检测组织中circ＿0016788和miR-1200表达；将肝癌细胞MHCC97分为si-NC组、si-circ＿0016788组、si-circ＿0016788+anti-miR-NC组、si-circ＿0016788+anti-miR-1200组。四甲基偶氮唑盐比色法(MTT)检测细胞增殖活性；Western印迹检测增殖、凋亡、迁移和侵袭蛋白表达；Transwell小室实验检测细胞迁移和侵袭；流式细胞术检测细胞凋亡；双荧光素酶报告基因实验验证circ＿0016788和miR-1200的靶向关系。结果 circ＿0016788在肝癌组织中的表达水平高于显著癌旁组织(P<0.05),miR-1200表达水平显著低于癌旁组织(P<0.05)。抑制circ＿0016788表达后，肝癌MHCC97细胞活性、细胞迁移侵袭能力及CyclinD1、Bcl-2、MMP-2、MMP-9表达水平显著升高(P<0.05),细胞凋亡率及p21、Bax表达水平显著...     

血清人附睾蛋白4联合糖类抗原125检测对浆液性卵巢癌的诊断价值

目的 探讨血清人附睾蛋白(HE)4联合糖类抗原(CA)125检测对浆液性卵巢癌的诊断价值。方法选择浆液性卵巢癌患者87例(浆液性卵巢癌组)、卵巢良性肿瘤患者77例(阴性对照组)及健康查体妇女52例(正常对照组),采用化学发光法分别检测血清HE4、CA125水平,用受试者工作特征(ROC)曲线分析血清HE4联合CA125检测诊断浆液性卵巢癌的效能。结果 浆液性卵巢癌组血清HE4、CA125水平明显高于阴性对照组及正常对照组(P均<0.05);晚期浆液性卵巢癌组患者血清HE4水平高于早期患者(P<0.05);HE4、CA125联合检测ROC曲线下面积大于二者单独检测(P均<0.05)。结论 HE4、CA125联合检测比单独检测对早期浆液性卵巢癌的诊断价值更高。     

2型糖尿病患者血浆环状RNA差异性表达的研究

目的 探讨T2DM患者血浆环状RNA(circRNA)差异性表达及在T2DM发生发展中的作用。方法 选取2022年3月至2023年3月于菏泽市立医院内分泌科住院治疗的新诊断T2DM患者33例（T2DM组）和同期体检健康者33名（NC组）。两组采用高通量测序技术检测并筛选出差异表达的circRNA,选取差异倍数较大的6个circRNA,采用RT-qPCR在其余两组中验证芯片结果。对显著差异表达的circRNA进行生物信息学分析,并预测其与微小RNA(miRNA)的相互作用。结果芯片结果显示,与NC组比较,T2DM组共有166个显著差异表达的circRNA（差异倍数≥2,P<0.05）其中上调137个,下调29个。q RT-PCR验证的6个circRNA中,T2DM组hsa＿circ＿0000705相对表达量高于NC组,hsa＿circ＿0005362、hsa＿circ＿0042839相对表达量低于NC组,与芯片结果一致,两组hsa＿circ＿0117392、hsa＿circ＿0008311、hsa＿circ＿0087641表达无差异。circRNA与miRNA的结合位点预测提示差异...     

hsa＿circ＿0131457在胰腺癌组织中的表达变化及其过表达对癌细胞生物学行为的影响

目的 观察环状RNA hsa＿circ＿0131457在胰腺癌组织和细胞中的表达变化，探讨hsa＿circ＿0131457过表达对胰腺癌细胞增殖、凋亡、迁移、侵袭等生物学行为的影响。方法 收集胰腺癌组织及配对癌旁正常组织各7例份，对数生长期的胰腺癌细胞PANC-1、SW1990、CFPAC-1和正常胰腺导管上皮细胞HPDE6-C7，采用实时荧光定量PCR法检测hsa＿circ＿0131457表达。以hsa＿circ＿0131457表达最低的胰腺癌细胞为研究对象，分为过表达组和对照组，分别采用脂质体转染法转染hsa＿circ＿0131457过表达质粒及对照质粒。取转染后的两组细胞，采用CCK-8法检测两组培养0、24、48、72、96 h的OD值，TUNEL染色法检测细胞凋亡率，细胞划痕实验记录细胞迁移距离，Transwell小室实验记录穿膜细胞数，Western blotting法检测细胞凋亡相关蛋白细胞周期素D2(CCND2)和周期素依赖性激酶4(CDK4)蛋白相对表达量。结果 胰腺癌组织和癌旁正常组织hsa＿circ＿0131457相对表达量分别为0.011±0.017、2.084...     

hsa＿circRNA6448-14对食管鳞癌细胞恶性增殖能力的影响

目的 分析hsa＿circRNA6448-14对食管鳞癌(esophageal squamous cell carcinoma, ESCC)细胞恶性增殖能力的影响,探讨其临床意义。方法 建立hsa＿circRNA6448-14敲低的ESCC KYSE30及KYSE150细胞系,实验分为对照组及观察组。通过qRT-PCR检测各组细胞系中hsa＿circRNA6448-14的相对表达量;采用CCK8法及平板克隆实验检测各组细胞的体外增殖能力。通过t检验比较两组细胞间hsa＿circRNA6448-14表达量差异及体外增殖能力差异。结果 与对照组相比,观察组细胞中hsa＿circRNA6448-14的相对表达量显著降低,体外增殖能力显著减弱,差异均具有统计学意义(P<0.05)。结论 hsa＿circRNA6448-14为ESCC细胞恶性增殖过程中的关键调控因子,靶向hsa＿circRNA6448-14可能抑制ESCC恶性演进。     

circ＿0000337靶向miR-578对皮肤鳞状细胞癌A431细胞生物学行为的影响

目的 探讨circ＿0000337靶向miR-578对皮肤鳞状细胞癌(CSCC)A431细胞生物学行为的影响。方法 收集CSCC组织及癌旁组织，采用实时荧光定量聚合酶链反应(RT-qPCR)分析circ＿0000337和miR-578在CSCC组织中的表达。将si-NC、si-circ＿0000337、miR-NC、miR-578 mimics、pcDNA、pcDNA-circ＿0000337、si-circ＿0000337+anti-miR-NC、si-circ＿0000337+anti-miR-578分别转染A431,并用CCK-8、克隆形成实验、Transwell实验分析A431细胞活力、克隆形成数、迁移数和侵袭数变化。采用双荧光素酶报告基因法检测circ＿0000337与miR-578之间的关系。结果 circ＿0000337在CSCC组织中明显高表达，miR-578明显低表达(P<0.05)。转染si-circ＿0000337可明显抑制circ＿0000337表达，明显降低细胞活力，明显减少克隆形成数、迁移数和侵袭数，明显上调miR-578表达水平(P<0.05)...     

胰岛素瘤的解剖分布特点分析

目的胰岛素瘤是最常见的胰腺神经内分泌肿瘤，因其临床表现多样，导致诊断困难。影像学诊断尤其是超声内镜(EUS)在胰岛素瘤的诊断中起着重要作用，拥有较高的敏感性和特异性。本研究拟通过明确胰岛素瘤的解剖分布特点，以期有助于提高影像学的诊断准确率和降低漏诊率，尤其是在教育和培训实践中对于EUS的学习者更具有指导价值。 方法回顾性分析解放军总医院第一医学中心病案资料数据库1993年1月至2019年11月经外科手术、病理确诊为胰岛素瘤的患者的临床资料，检索方法采取搜索术后病理诊断为"胰岛素瘤"的病例，通过查阅病例的方法，提取出胰岛素瘤的大小和解剖分布等数据，进一步分析其特点。 结果共检索到确诊为胰岛素瘤的患者116例，其中，男45例、女71例，年龄13～76岁，平均年龄(44.4±14.85)岁。胰岛素瘤单发110例(94.8%)、多发6例(5.2%)。位置分布：头颈部46例(39.7%)，单发45例、多发1例；体尾部68例(58.6%)，单发65例、多发3例；全胰腺多发2例(1.7%)。病变大小特点：最大径0.4～3.4 cm，平均大小(1.53±0.58)cm。≤1 cm 29例、>1 cm而≤1.5 cm41例、>1.5 cm而≤2.0 cm28例，≤3 cm 15例，>3 cm 3例。年龄与肿瘤的大小相关，≤44岁患者肿瘤平均大小为(1.36±0.51)cm、>44岁患者肿瘤平均大小为(1.70±0.60)cm，P<0.05。头颈部的肿瘤大于体尾部的肿瘤，头颈部肿瘤平均大小(1.66±0.63)cm，体尾部(1.42±0.52)cm，P<0.05。 结论胰岛素瘤在胰腺体尾部较头颈部更好发；绝大多数单发，但可以全胰腺多发；多数小于1.5 cm，肿瘤的大小与患者年龄和肿瘤的解剖分布相关。     

Pathogenesis of carcinoma of the papilla of Vater

Most adenomas and carcinomas of the small intestine and extrahepatic bile ducts arise in the region of the papilla of Vater. In familial adenomatous polyposis (FAP) it is the main location for carcinomas after proctocolectomy. In many cases symptoms due to stenosis lead to diagnosis at an early tumor stage. In about 80%, curative intended resection is possible. Operability is the most relevant prognostic factor. Most ampullary carcinomas resp. carcinomas of the papilla of Vater develop from adenomatous or flat dysplastic precursor lesions. They can be sited in the ampulloduodenal part of the papilla of Vater, which is lined by intestinal mucosa. They also can develop in deeper parts of the ampulla, which are lined by pancreaticobiliary duct mucosa. Intestinal-type adenocarcinoma and pancreaticobiliary-type adenocarcinoma represent the main histological types of ampullary carcinoma. Furthermore, there exist unusual types and undifferentiated carcinomas. Many carcinomas of intestinal type express the immunohistochemical marker profile of intestinal mucosa (keratin 7?, keratin 20+, MUC2+). Carcinomas of pancreaticobiliary type usually show the immunohistochemical profile of pancreaticobiliary duct mucosa (keratin 7+, keratin 20?, MUC2?). Even poorly differentiated carcinomas, as well as unusual histological types, may conserve the marker profile of the mucosa they developed from. These findings underline the concept of histogenetically different carcinomas of the papilla of Vater which develop either from intestinal- or from pancreaticobiliary-type mucosa of the papilla of Vater. Molecular alterations in ampullary carcinomas are similar to those of colorectal as well as pancreatic carcinomas, although they appear at different frequencies. In future studies, molecular alterations in ampullary carcinomas should be correlated closely with the different histologic tumor types. Consequently, the histologic classification should reflect the histogenesis of ampullary tumors from the two different types of papillary mucosa.     

Demonstration of the mechanism of action of biguanides

Summary Palmitic acid oxidation in rat diaphragm homogenate is depressed by biguanide concentrations that are still incapable of inhibiting oxidative phosphorylation. Glucose oxidation is not directly effected by the same biguanide concentrations: however, the inhibitory effect of palmitic acid on glucose oxidation is partly removed by biguanides. Inhibition of fatty acid oxidation, which accounts for most of the metabolic effects caused by these drugs, can be regarded as the fundamental mechanism of action of biguanides. There is some evidence suggesting that these drugs might interact with carnitine, thus preventing long-chain fatty acids from being transported across the mitochondrial membrane to the site of oxidation. Traduzione a cura degli AA.     

Lack of correlation of degree of villous atrophy with severity of clinical presentation of coeliac disease

BACKGROUND AND AIM: Both the clinical presentation and the degree of mucosal damage in coeliac disease vary greatly. In view of conflicting information as to whether the mode of presentation correlates with the degree of villous atrophy, we reviewed a large cohort of patients with coeliac disease. PATIENTS AND METHODS: We correlated mode of presentation (classical, diarrhoea predominant or atypical/silent) with histology of duodenal biopsies and examined their trends over time. RESULTS: The cohort consisted of 499 adults, mean age 44.1 years, 68% females. The majority had silent coeliac disease (56%) and total villous atrophy (65%). There was no correlation of mode of presentation with the degree of villous atrophy (p=0.25). Sixty-eight percent of females and 58% of males had a severe villous atrophy (p=0.052). There was a significant trend over time for a greater proportion of patients presenting as atypical/silent coeliac disease and having partial villous atrophy, though the majority still had total villous atrophy. CONCLUSIONS: Among our patients the degree of villous atrophy in duodenal biopsies did not correlate with the mode of presentation, indicating that factors other than the degree of villous atrophy must account for diarrhoea in coeliac disease.     

血吸虫童虫生长发育及其机制的研究进展

血吸虫童虫是宿主免疫系统攻击的重要靶标,包括皮肤型、肺型和肝门型童虫。宿主分子对童虫生长发育具有重要作用。童虫生长发育机制包括免疫调节、信号转导、性别发育及凋亡等。肌动蛋白、组织蛋白酶、烯醇化酶和葡萄糖基转移酶等分子为血吸虫童虫生长发育的重要分子。本文对血吸虫童虫生长发育及其机制的研究进展做一综述。     

氯硝柳胺悬浮剂的毒性评价

目的评价氯硝柳胺悬浮剂的毒性，为现场大规模应用灭螺提供依据。方法按照中华人民共和国国家标准GB 15670-1995《农药登记毒理学试验方法》和鱼类毒性试验方法进行。结果经口、经皮肤的LDso雌、雄性大鼠均>5 000 mg/kg，经呼吸道的LCso雌、雄性大鼠均>5 000mg/m3，该药经口、经皮肤、经呼吸道毒性均属微毒类药物；兔眼用药后，观察期内无不良反应，对眼无刺激性；皮肤用药后对皮肤无刺激性。与氯硝柳胺原药、氯硝柳胺乙醇胺盐原药和氯硝柳胺乙醇胺盐可湿性粉剂相比，氯硝柳胺悬浮剂对鱼急性毒性最低。结论氯硝柳胺悬浮剂属微毒类药物，对鱼的毒性低于其乙醇胺盐可湿性粉剂，适合于现场应用。     

124例耐多药结核分枝杆菌基因突变特征分析

目的对临床分离的耐多药结核分枝杆菌相关基因的突变特征进行分析。方法对124例耐多药结核分枝杆菌以及50株敏感株的耐药相关基因(包括异烟肼inh A、kat G、oxyR-ahp C间隔区以及利福平rpo B)进行序列测定,分析其基因突变情况。结果异烟肼耐药inh A基因突变率为14.5%;kat G基因突变率为70.2%(87/124),主要位于315位;oxyR-ahp C间隔区突变率为15.3%;inh A、kat G两种基因同时突变率75.0%,三种基因同时突变率为89.5%。利福平rpo B基因突变的检出率高达95.2%,突变主要发生在531、526、516位点。结论我省耐多药菌异烟肼耐药相关基因最常见突变为kat G 315、inh A C-T(-15)、axyR-ahp C间隔区(-10)C-T,利福平为rpo B531、526、516。结合MDR-TB耐药相关基因的特征分析,可以建立一种快速、准确、特异的适合于我省的检测结核菌耐多药性的新方法。     

Assessment of quality of life of parents of children with juvenile chronic arthritis

The aim of the study was to assess the quality of life (QOL) and the psychological status of parents of children with juvenile chronic arthritis (JCA). The QOL, anxiety and depression of the parents of 28 children with JCA were evaluated and compared to those of the parents of 28 healthy children. Mothers of JCA children and mothers of healthy children reported similar QOL. The reported anxiety and depression levels were similar for mothers and fathers in both groups. The parents of children with pauciarticular-type JCA reported lower QOL and higher levels of anxiety and depression than the parents of children with other types, namely polyarticular and systemic JCA. These findings may be explained by the fact that the pauciarticular patients had shorter disease duration and were less frequently seen in the outpatient clinic. The QOL of mothers of children with JCA was found to be slightly impaired in the group of children with pauciarticular JCA. Future larger studies are needed to confirm these results, as the number of subjects in the three groups was rather low. Received: 26 September 2001 / Accepted: 8 February 2002     

Numerical Simulation of the Effect of Rate of Change of Glucose on Measurement Error of Continuous Glucose Monitors

Background

A 5-day in-patient study designed to assess the accuracy of the FreeStyle Navigator® Continuous Glucose Monitoring System revealed that the level of accuracy of the continuous sensor measurements was dependent on the rate of glucose change. When the absolute rate of change was less than 1 mg•dl⁻¹•min⁻¹ (75% of the time), the median absolute relative difference (ARD) was 8.5%, with 85% of all points falling within the A zone of the Clarke error grid. When the absolute rate of change was greater than 2 mg•dl⁻¹•min⁻¹ (8% of the time), the median ARD was 17.5%, with 59% of all points falling within the Clarke A zone.

Method

Numerical simulations were performed to investigate effects of the rate of change of glucose on sensor measurement error. This approach enabled physiologically relevant distributions of glucose values to be reordered to explore the effect of different glucose rate-of-change distributions on apparent sensor accuracy.

Results

The physiological lag between blood and interstitial fluid glucose levels is sufficient to account for the observed difference in sensor accuracy between periods of stable glucose and periods of rapidly changing glucose.

Conclusions

The role of physiological lag on the apparent decrease in sensor accuracy at high glucose rates of change has implications for clinical study design, regulatory review of continuous glucose sensors, and development of performance standards for this new technology. This work demonstrates the difficulty in comparing accuracy measures between different clinical studies and highlights the need for studies to include both relevant glucose distributions and relevant glucose rate-of-change distributions.     

Study of constancy of hydrogen-consuming flora of human colon

The constancy of the hydrogen consuming flora of the human colon was studied in 15 healthy subjects via two measurements obtained 18 to 36 months apart. Hydrogen disappearance rate and the major products of H₂-consuming bacteria, methane and sulfide, were measured during incubation of fecal homogenates with excess hydrogen and sulfate. In 11/15, the hydrogen consumption rate and the predominant hydrogen-consuming pathway (methanogenesis, sulfate reduction, or neither) remained constant. However, major shifts in these pathways were observed in four subjects, with two losing and two gaining the ability to produce methane. Methanogenesis was associated with the highest hydrogen consumption rate. This study demonstrates that clinically unrecognizable, major alterations of the colonic flora occur in healthy subjects. Understanding of the factors responsible for these alterations might allow for therapeutic manipulation of the colonic flora.Supported in part by the Department of Veterans Affairs and NIDDKD RO1 DK 13309-25.