Preliminary study on immunotoxin for the prevention of Schistosomiasis japonica

To investigate the effects of immunotoxin (bio-missile) on the prevention of schistosomiasis. The monoclonal antibody NP11-4, located in out-layer membrane of adult worm, membrane of cercariae, membrane of schistosomula, shell of egg and membrane of miracidium in egg, was combined with artesunate (produced by Guilin Pharmaceutical Factory of China) by chemical method to fabricate immunotoxin.     

注射用克林霉素磷酸酯的稳定性研究

目的：对影响注射用克林霉素磷酸酯稳定性的各种因素进行考察,方法：采用高效液相色谱法测定注射用克林霉素磷酸酯的稳定性。结果：温度对本制剂稳定性有影响,对光稳定性较好。结论：本制剂应于凉暗干燥处贮存。     

淋病奈瑟氏菌中国流行株gyrA和parC基因与喹诺酮类耐药性的相关性

目的　调查中国地区淋病奈瑟氏菌 (NG)对喹诺酮类的耐药性状况 ,探讨高水平耐药的基因突变株对喹诺酮类耐药机制的作用 .方法　对 9a来临床分离保存淋球菌流行株进行了体外环丙沙星 (CIP)药敏实验 .筛选出 76株高水平CIP耐药株 ,通过 PCR扩增了其中的 1 8株 NG的 gyr A和par C喹诺酮耐药决定区基因 ,并对扩增子直接测序 .通过N he I酶切、脉冲电场凝胶电泳 (PFEG)分析了这些菌株的遗传关系 .结果　环丙沙星的耐药检出率有逐年增高的趋势 ,MIC≥ 1 .0 mg· L- 1的菌株由 1 993年的 5 .1 %上升到 2 0 0 1年的 2 1 .4% .对照组中的 1 8株敏感菌只有两株发生了 gyr A的单一突变 ,未发现 par C变异 ;而耐药组中 89% (1 6 )菌株的gyr A发生了 Ser- 91向 Phe的单一突变株或 (和 ) par C的双突变 .88.9% (1 5 )的菌株的 gyr A发生了 Ser- 91向 Phe和 Asp-95向 Gly的突变 .在发生 par C突变中 72 %属于 Asp- 86向Asn突变 .PFEG分析发现 1 0株具有完全一致的 gyr A和par C突变模式 .同时也发现来自不同地区的菌株的 PFEG指纹图是不同的 .结论　研究表明 ,在中国 NG流行株对喹诺酮类耐药率呈增长趋势 ;NG流行株对喹诺酮产生耐药性与gyr A和 par C基因双重突变有着密切的关系     

乳腺癌组织中—p—MAPK活化对c—fos和c—jun的激活作用

OBJECTIVE: This paper was to investigate the relationship between expression of p-MAPK and oncogenesis of breast cancer. METHODS: Immunohistochemical technique was used to detect the expression of p-MAPK and c-fos and c-jun proteins in 68 cases of breast cancers, 42 cases of pericarcinomatous tissues and 7 cases of normal breast tissues. RESULTS: Positive stainings of p-MAPK, c-fos, and c-jun were localized in cancer cell nuclei. The positive rates of p-MAPK, c-fos, and c-jun were 86.8% (59/68), 82.4% (56/68), and 77.9% (53/68), respectively, which were much higher than that in pericarcinomatous tissues (P < 0.01). Of some cases, p-MAPK positive staining was also found in the nuclei of the fibroblastic and angioendothelial cells of cancer stroma. CONCLUSION: Activated or overexpressive MAPK activates the immediately-early oncogenes(c-fos, c-jun), which might play an important role in carcinogenesis of breast cancer and be an early event of oncogenesis of breast cancer.     

电化学聚合漆酚-锌金属螯合物合成及性质研究

以电化学方法合成了聚合漆酚（ＥＰＵ）,并用ＥＰＵ与二异丙氧基锌作用生成漆酚金属螯合物「ＥＰＵ－Ｚｎ（Ⅱ）」,采用原子发射光谱（ＡＥＳ）、ＦＴ－ＩＲ、ＤＭＴＡ、ＴＧ－ＤＴＡ和ＸＰＳ等对其进行表征,探讨其结构与性质。证明了螯合物中存在着因Ｚｎ（Ⅱ）和ＥＰＵ配位作用而引起的交联,故难溶于绝大多数的有机溶剂,玻璃化转变温度和耐热性能的提高。     

下肢手术消毒架的制作

本消毒架在下肢手术术前消毒过程中,可解决抬高患肢、省力及扩大消毒面积等问题。     

检验信息管理系统在检验工作中的应用体会和方法

随着计算机的应用与普及,医院计算机网络化管理已成为医院管理现代化的标志."军字1号"工程的实施为检验信息管理工作实现计算机网络化管理提供了条件.同时,改善了工作环境,提高了工作效率和工作质量;减轻了劳动强度;增加了收费和检验结果的透明度.     

Characterization and phylogenetic analysis of a neurovirulent Zika virus isolated from Cambodia in 2019

The geographic range of Zika virus (ZIKV) has expanded from Asia to the Americas, leading to the 2015–2016 pandemic with enhanced neurovirulence. At present, ZIKV is continuously circulating in many Southeast Asian countries. Unfortunately, the persistent evolution of ZIKV in Southeast Asia and its influence on the biological characteristics of the virus remain incompletely understood. In this study, the in vitro and in vivo properties of a new ZIKV isolate obtained from Cambodia in 2019 (CAM/2019) were characterized and compared with those of the Cambodian strain (CAM/2010). Compared with CAM/2010, the CAM/2019 virus showed similar plaque morphology and growth curves in cell cultures and induced comparable viremia and organ viral loads profiles in both BALB/c and A129 (IFNAR1^−/−) mice upon intraperitoneal (i.p.) inoculation. Remarkably, the CAM/2019 virus exhibited enhanced neurovirulence in neonatal mice compared with CAM/2010, with a 74-fold reduction in the 50% lethal dose (LD₅₀). Consistently, CAM/2019 produced higher viral loads in the brains of BALB/c neonatal mice than CAM/2010 did. Sequence alignment showed that the CAM/2019 virus has acquired 12 amino acid substitutions, several of which were found to be associated with neurovirulence. In particular, the CAM/2019 virus shared an A1204T substitution in NS2A with the Thai isolate SI-BKK02 that was isolated from a microcephaly case. Taken together, our results indicate that a ZIKV strain isolated with specific mutations has emerged in Cambodia, highlighting the need for extensive molecular and disease surveillance in Cambodia and other Asian countries.     

Role of Th1/Th2 cells activation in chronic hepatitis B virus infection

Clonal analysis of mndne T cells has led to the idenuncation of Z typeS of Th cells, Thl and on. Thl cells,chacterized by secreting interferon-y (Iap-Y), interleukin-2 (IL2) and tumor necrosis factor-5 (TNF-3), involved Principally in cell-mediated ~ity and play acrucial role in defending the host against intracellularPathogens such as a Vallety of yi~es. ThZ cells,secreting IL4, ms, IL-6 and ilo, mostly regulateh~ immune responSe, and may oafs Paxtial PIDtection against extracellula…     

Differences between the gap junctional communication function of fibroblasts derived from pathological scars and normal skin

Keloid is a fibrotic disease Of the hUInan dends thattakes the form of benign fibIOus tumors resulting from anabnolmal response to wound. Unlike hyperplastic scarewith which keloid is freqUently collfused, keloid lesionusually extends beyond the bountyyes of the originalwound by invasive growth without rendssion with time,which is diffictilt to cormct s~cally and does not proVOke scar .on~tionll'2].It is noted that there ~ vallous patterns of intereellular interachon, as junchonal interoell…