Clinical analysis of the risk factors for recurrence of HCC and its relationship with HBV

AIM: To comprehend the risk factors of recurrence of hepatocellular carcinoma (HCC) and its relationship with the infection patterns of hepatitis B virus (HBV).METHODS: All materials of 270 cases of postoperative HCC were statistically analyzed by SPSS software.Recurrence and metastasis were classified into early( ≤2 years) and late phase (>2 years). Risk factors for recurrence and metastasis after surgery in each group were analyzed.RESULTS: Out of 270 cases of HCC, 162 cases were followed up in which recurrence and metastasis occurred in 136 cases. There were a lot of risk factors related to recurrence and metastasis of HCC; risk factors contributing to early phase recurrence were serum AFP level, vascular invasion, incisal margin and operative transfusion, gross tumor classification and number of intrahepatic node to late phase recurrence. The HBV infective rate of recurrent HCC was 94.1%, in which ““HBsAg, HBeAb, HBcAb““ positive pattern reached 45.6%. The proportion of HBV infection in solitary large hepatocellular carcinoma (SLHCC)evidently decreased compared to nodular hepatocellular carcinoma (NHCC) (P<0.05).CONCLUSION: The early and late recurrence and metastasis after hepatectomy of HCC were associated with different risk factors. The early recurrence may be mediated by vascular invasion and remnant lesion, the late recurrence by tumor‘s clinical pathology propert, as multicentric carcinogenesis or intrahepatic carcinoma de novo. HBV replication takes a great role in this process.From this study, we found that SLHCC has more satisfactory neoplasm biological behavior than NHCC.     

粮食中微量元素锌与大骨节病的关系

本文就西南大骨节病区粮食中微量元素锌、铁、锰、铜、铬测定作了初步分析。其中较有规律的是锌,并对锌在大骨节病发病过程中的作用进行了试探性讨论。认为锌在发病中占有重要的地位,很可能是硒对大骨节病作用的重要复合因子之一。     

Molecular bases of antithrombin deficiency in French families: identification of seven novel mutations in the antithrombin gene

We have investigated the molecular bases of familial antithrombin deficiency in eight French families. Eight mutations in the antithrombin coding exons were identified, seven of which were novel mutations. In all cases, individuals were heterozygous for the mutation. We found two small frameshift deletions in exon 3a, leading to type I deficiency. Five missense mutations in exons 3b or 5 also caused type I deficiency and their potential consequences on the antithrombin three-dimensional structure were analysed. The last mutation in exon 4 was associated with a type II 'reactive site' deficiency: a dysfunctional antithrombin that is affected in its interaction with thrombin was present in circulation.     

1996年全国糖尿病流行病学特点基线调查报告

根据ＷＨＯ１９８５年标准，采用自然人群、分层整群抽样方法，我们于１９９５￣１９９６年对全国１１省市２０￣７５岁４万人群进行糖尿病（ＤＭ）及糖耐量低减（ＩＧＴ）流行病学特点的基线情况调查，并对人群营养状况进行了深入细致的调查分析。结果显示目前我国ＤＭ及ＩＧＴ患病率分别为３．２１％和４．７６％，省会城市最高，中小城市次之，贫困农村最低。ＤＭ及ＩＧＴ患病率随年龄、体重指数及腰／臀比的增加而增高。     

Cross-host evolution of severe acute respiratory syndrome coronavirus in palm civet and human

The genomic sequences of severe acute respiratory syndrome coronaviruses from human and palm civet of the 2003/2004 outbreak in the city of Guangzhou, China, were nearly identical. Phylogenetic analysis suggested an independent viral invasion from animal to human in this new episode. Combining all existing data but excluding singletons, we identified 202 single-nucleotide variations. Among them, 17 are polymorphic in palm civets only. The ratio of nonsynonymous/synonymous nucleotide substitution in palm civets collected 1 yr apart from different geographic locations is very high, suggesting a rapid evolving process of viral proteins in civet as well, much like their adaptation in the human host in the early 2002–2003 epidemic. Major genetic variations in some critical genes, particularly the Spike gene, seemed essential for the transition from animal-to-human transmission to human-to-human transmission, which eventually caused the first severe acute respiratory syndrome outbreak of 2002/2003.     

A cardiac hydatid cyst involving the basal interventricular septum causing biventricular outflow tract obstruction

We report a case of a 37-year-old sheep-raising man with a cardiac hydatid cyst involving the basal interventricular septum causing biventricular outflow obstruction. He suffered from multi-organ hydatidosis and underwent cerebral hydatid cyst extirpation and right nephrectomy for renal echinococcosis. The diagnosis of the cyst was obtained by echocardiography and magnetic resonance imaging. The diagnosis was confirmed by positive hemagglutination test. He was operated on for cardiac hydatid cyst using enucleation and capitonnage procedure under extracorporeal circulation. The morbidity was complete atrioventricular block, necessitating VDD pacemaker implantation. This was followed by medical treatment with albendazole (400 mg/day).     

巴彦乌拉铀矿周围饮用井水中总放射性水平调查

目的 调查巴彦乌拉铀矿周围饮用井水中总放射性水平。方法 采集2020年巴彦乌拉铀矿周围枯水期和丰水期饮用井水174份,以及居民家中经过滤后的饮用井水5份。分析枯水期和丰水期总α和总β放射性水平是否存在差异,总放射性水平与距离铀矿中心不同位置的关系,并对居民家中过滤后的饮用井水进行放射性水平调查。采用低本底α、β放射性测量仪测量分析其放射性水平。结果 巴彦乌拉铀矿周围饮用井水中,枯水期总α范围为0.024~ 2.468 Bq/L, 平均为(0.605±0.507)Bq/L,总β变化范围为0.125~1.395 Bq/L,平均为(0.420±0.235)Bq/L。丰水期总α变化范围为0.049~2.988 Bq/L,平均为(0.825±0.605)Bq/L,总β变化范围为0.059~1.623 Bq/L,平均为(0.506±0.265)Bq/L。距离铀矿中心位置水样的总放射性水平均值关系为10 km>30 km>20 km。结论 巴彦乌拉铀矿周围饮用井水中的放射性活度偏高,丰水期水样中总α、总β放射性水平均大于枯水期,放射性水平较未开采前未见升高。     

基于ADC和增强MRI的影像组学模型预测低级别胶质瘤TERT启动子突变状态

目的:探讨基于ADC和增强MRI的影像组学模型对低级别胶质瘤端粒酶逆转录酶基因（TERT）启动子突变状态的预测价值。方法:回顾性搜集109例经病理证实的低级别胶质瘤患者,所有患者术前均行MRI检查,在ADC和对比增强T₁WI（T₁CE）图像上选取病灶最大层面,沿肿瘤边缘勾画ROI,提取影像组学特征。采用三联法（Fisher, POE+ACC,MI）和最小绝对收缩选择算子（LASSO）进行特征筛选,然后行多因素logistic回归分析,构建影像组学预测模型。采用ROC曲线评估预测模型的诊断效能。结果:在ADC和T₁CE图像上分别提取279个影像组学特征,最终筛选出11个影像组学特征,分别建立ADC模型、T₁CE模型和联合分析（ADC+T1CE）模型共3个影像组学模型。联合分析模型的预测效能最佳,训练集中曲线下面积（AUC）为0.928（95%CI:0.859～0.996）,验证集中AUC为0.878（95%CI:0.758～0.997）。结论:基于ADC和增强MRI的影像组学模型能有效预测低级别胶质瘤...     

缺氧预处理提高骨髓基质细胞促进血管新生能力

目的 研究缺氧对骨髓基质细胞(bone marrow stromal cells，BMSCs)表达血管内皮细胞生长因子(vascular endothelial growth factor，VEGF)及促进血管新生能力的影响。方法 将BMSCs置于缺氧环境下培养24h后，研究其VEGF表达的变化。将急性心肌梗死大鼠随机分为3组。未处理组在梗死后4w移植未经缺氧处理的BMSCs；缺氧组将经缺氧预处理的BMSCs注射到心肌梗死区；对照组仅注射无血清的培养液。在梗死后6w取各组标本观察梗死区及周围VEGF的表达和血管新生状况。结果 体外培养的BMSCs经缺氧预处理后VEGF的表达明显增加。缺氧组和未处理组梗死区及周围VEGF的表达和毛细血管密度较对照组明显增加。缺氧组VEGF的表达和毛细血管密度又较未处理组明显增加。结论 体外缺氧可诱导BMSCs高表达VEGF。BMSCs移植后促进梗死区及周围VEGF的表达，对血管新生有积极作用。移植前缺氧预处理使BMSCs促进缺血心肌组织表达更多的VEGF从而提高其促进血管新生作用。     

基质金属蛋白酶/组织金属蛋白酶抑制物表达失衡在大鼠肾脏衰老过程中的意义

目的:探讨基质金属蛋白酶(MMPs)及其抑制物(TIMPs)在大鼠肾脏衰老过程中的作用。方法:选用3、12和24月龄大鼠，采用免疫组化技术分别检测基质金属蛋白酶—2、9(MMP—2、9)、组织金属蛋白酶抑制物—1、2(TIMP—1、2)、转化生长因子—β1(TGF—β1)等在不同月龄大鼠肾组织中的表达。结果TIMP—1、TIMP—2及TGF—β1主要表达在肾小球、肾小管、间质及血管，并随增龄表达增强(P＜O．01)；MMP—9、MMP—2主要表达在肾小管上皮细胞，随增龄表达无变化；TIMP—1与TGF—β1与肾小球硬化面积有相关性(r分别为O．751、O．771，P＜O．05)；TIMP—1与TIMP—2与小管间质纤维化面积有相关性(r分别为O．783、O．766，P＜O．O5)。结论:MMPs／TIMPs表达失衡在肾脏衰老过程中可能起重要作用。