人甲胎蛋白时间分辨免疫荧光分析试剂盒的研制

目的研制人甲胎蛋白(hAFP)时间分辨免疫荧光分析(TRFIA)试剂盒.方法采用双抗体夹心法建立AFP TRFIA 试剂盒,对试剂盒的各项指标进行评价.结果试剂盒的可测范围为l～1 000 U/ml,灵敏度为0.17 U/ml,精密度良好,批内和批间的精密度分别为3.3%～5.9%,3.7%～6.5%.与CEA、CA12-5、CA19-9、CA15-3、白蛋白无交叉反应.稳定性试验表明试剂可以在4℃稳定1年,37℃稳定7 d.426份正常血清标本测试该试剂盒的正常参考值范围是0～12 U/ml.用本试剂盒与国外同类试剂盒同时检测60份血清标本,其相关系数为0.995.结论试剂盒各项指标(灵敏度、精密度、特异性、稳定性、准确度)均达到临床检测要求,可替代国外同类产品试剂盒.     

组织多肽特异性抗原在乳腺癌中的临床研究

OBJECTIVE: To investigate the expression of serum tissue polypeptide-specific antigen (TPS) in breast cancer patients and its clinical value in such cases. METHODS: Altogether 160 subjects (90 patients with breast cancer, 40 with benign breast lesions, and 30 healthy subjects) were enrolled in this study. The serum TPS and CA153 levels were measured by ELISA in all the subjects. RESULTS: The levels and positivity rate of serum TPS and CA153 in breast cancer group were significantly higher than those in the normal subjects group and benign lesion group (P<0.01), and became even higher as the malignancy progressed. High serum TPS level was detected in the cancer patients in stage I. Serum TPS level was the most sensitive to bone metastasis of the malignancy, but its highest levels occurred in cases of lymphoid node metastasis (P<0.05). In patients who responded favorably to the treatment, serum TPS and CA153 levels were significantly reduced (P<0.05), but the reduction in TPS levels tended to be more obvious (P<0.05). CONCLUSION: Serum TPS can be used as a very useful and sensitive tumor marker in the diagnosis of breast cancer, especially in case of bone metastasis, and may be of great value in clinical decision-making and assessment of therapeutic effect.     

A locus for spondylocarpotarsal synostosis syndrome at chromosome 3p14

Spondylocarpotarsal synostosis syndrome is a rare autosomal recessive disorder characterised by vertebral fusions, frequently manifesting as an unsegmented vertebral bar, as well as fusions of the carpal and tarsal bones.

In a study of three consanguineous families and one non-consanguineous family, linkage analysis was used to establish the chromosomal location of the disease gene. Linkage analysis localised the disease gene to chromosome 3p14. A maximum lod score of 6.49 (q = 0) was obtained for the marker at locus D3S3532 on chromosome 3p. Recombination mapping narrowed the linked region to the 5.7 cM genetic interval between the markers at loci D3S3724 and D3S1300. A common region of homozygosity was found between the markers at loci D3S3724 and D3S1300, defining a physical interval of approximately 4 million base pairs likely to contain the disease gene.

Identification of the gene responsible for this disorder will provide insight into the genes that play a role in the formation of the vertebral column and joints.

     

Synthesis and characterization of polyanhydride for local BCNU delivery carriers

p-Carboxyphenoxy propane (CPP) prepolymer consisting of 4 units and sebacic acid (SA) prepolymer consisting of about 10 units were synthesized by reacting CPP and SA in the presence of excess acetic anhydride, respectively. Polyanhydride, poly(CPP-SA) copolymers were copolymerized by a melt polycondensation process with a mixture of CPP and SA prepolymer. Copolymers of average molecular weight up to 110,000 g/mol were achieved. The crystallinity of poly(CPP-SA) copolymers was decreased by the addition of the CPP homopolymer segment to SA homopolymer. Poly(CPP-SA) copolymers gradually degraded for period of 10 days. No large difference of weight loss observed according to molecular weight variation of poly(CPP-SA) copolymers. BCNU release from wafers fabricated by poly(CPP-SA) showed a sustained release pattern with no initial burst and delay of drug release.     

Localization of plasminogen activator and inhibitor, LH and androgen receptors and inhibin subunits in monkey epididymis

Epididymis is a site of sperm maturation and storage. Limited and directed-proteolysis regulated by plasminogen activator (PA), plasminogen activator inhibitor type-1 (PAI-1) and other related factors may play an essential role in these processes. Our previous studies have demonstrated that rat epididymis expressed luteinizing hormone receptor (LHR), tissue type (t) and urokinase type (u)PA, mRNAs, and tPA activity was stimulated in vitro by human chorionic gonoadotrophin (HCG). In the present study we further examined localization of mRNAs for tPA, uPA, LHR, androgen receptor (AR), as well as inhibin subunits alpha, betaA and betaB in rhesus monkey epididymis. Using in-situ hybridization with digoxygenin-labelled cRNA probes, we have demonstrated that tPA and PAI-1 mRNAs were localized in epithelial cells of adult monkey epididymis. uPA mRNA was localized in the same areas, but to a much smaller extent. tPA, uPA and PAI-1 mRNAs were greatly expressed in the caput and corpus of adult epididymis than in other regions. In-vitro experiments showed that both tPA and uPA activities in epididymal cells were dramatically stimulated by HCG, but not by follicle stimulating hormone (FSH). LHR (but not FSH receptor) and AR mRNAs were localized in the epithelial cells of the epididymis. However, LHR mRNA was detected in both adult and immature infant monkeys, whereas AR was found only in the adult. Inhibin alpha, betaA and betaB mRNAs were also detected in this organ, betaA mRNA being more strongly expressed in the caput than in other regions of the epididymis. We suggest that LH and androgen may be the key hormones in coordination with the PA-PAI-1 system in regulating epididymal differentiation and sperm maturation.      

下颌颏部骨折内固定的三维有限元模型及边界约束的建立

通过Pro／E和ANSYS建立下颌骨颏部骨折内固定的三维有限元模型，并模拟了各种功能状态下的边界约束。使用计算机图像处理软件对CT扫描图像进行预处理，然后采用自编程序获取下颌骨解剖结构的三维坐标数据，用ANSYS建立下颌骨的三维有限元模型。采用数值化建模软件Pro／E建立小型接骨板-螺钉固定体系统的实体模型。模拟下颌骨颏部正中骨折坚强内固定治疗，建立该内固定治疗的有限元模型。通过改变各组咀嚼肌力的大小，进行了三种咬合状态的边界约束。获得了形态逼真、相似性好的下颌颏部骨折内固定后的三维有限元模型，并模拟了各功能状态下的边界约束，为后期的生物力学分析奠定了基础。     

NC在医院信息化建设中的研究与应用

本文对医院信息化建设中存在的问题进行分析研究，提出网络计算机（NETWORK COMPUTER）的解决方案。通过NC与PC在性能、适用性、性价比等方面的对比研究与测试。得出NC在医院信息管理中的高可用性。     

终板蛋白多糖的变化对颈椎间盘力学性能的影响

目的:通过测定退变颈椎间盘压缩性能的改变,同时观测软骨终板基质蛋白多糖(proteoglycan PG)的变化,为退变的椎间盘显现异常力学特性作一分子机制上的探讨。方法:将24只家兔随机分为对照组和模型组,模型组家兔保持45°低屈曲住5小时/次·天,取C5-6椎间盘进行生物力学测定;同时生化测定椎间盘终板糖胺多糖(glycosaminoglycan,GAG)总量、硫酸软骨素(chongdroitin sulphate,CS)和硫酸角质素(keratan sulphate,KS)比值和透明质酸(hyaluronic acid,HA)含量;总结分析颈椎间盘退变时基质各成分的系统变化及其对椎间盘力学性能的影响。结果:模型组终板抗压强度、断裂时的最大形变、终板基质蛋白多糖总含量、硫酸软骨素/硫酸角质素比值、透明质酸含量都低于对照组(P<0.05),并随造模进程的深入而减小。结论:长时间的应力不均状态,造成椎间盘终板材料力学特性改变;颈椎间盘基质蛋白多糖含量和成分改变是颈椎间盘生物力学性能减退的主要原因之一。     

肝再生增强因子对外原性抗原引起机体免疫应答影响的研究

目的 研究rALR对HBsAg及BSA免疫大鼠产生抗体、细胞因子和对脾脏细胞增殖的影响.方法 甲醇诱导表达rALR,测定活性并进行以下研究.①rALR对HBsAg免疫的影响:实验分为:生理盐水、HBsAg20 μg/只、HBsAg20 μg rALR100 μg/kg、HBsAg20 μg rALR 25 μg*kg、HBsAg20 v pPIC9K表达上清、HBsAg20 μg CsA10mg/kg,共6组;②rALR对BSA免疫的影响:实验分为:生理盐水、BSA25 μg/只、BSA25 μg rALR100 μg/kg、BSA25 μg pPIC9K表达上清、BSA25 μg CsA10 mg/kg,共5组.以上均皮下注射免疫大鼠,1次/周×4次,ELISA检测血清中相应抗体、IL-2和IFN-γ.③rALR对大鼠脾细胞增殖的影响:Wisar大鼠先皮下注射HBsAg(20 μg/只)1次,2周后处死,分离脾单核细胞,种板,再加HBsAg 1 μg/孔和/或相应处理因素(rALR、空质粒表达产物等),48h后加3H-TdR,12 h后收集细胞,检测cpm值.结果 rALR100 μg/kg HBsAg组的8只动物中,有2只出现抗HBs的抗体,空质粒对照组和单用HBs Ag组8只动物均出现抗HBs.rALR 100 μg/kg BSA组的8只动物中,有3只出现抗BSA抗体,空质粒对照组和单用BSA组8只动物均出现抗BSA的抗体.rALR 100μg/kg能明显抑制细胞因子IL2及IFN-γ的产生.rALR4μg体外能明显抑制脾细胞的增殖.结论 rALR能抑制HBsAg和BSA诱导大鼠产生相应抗体及IL-2、IFN-γ的产生;体外能抑制经体内致敏的脾细胞的增殖,说明rALR有免疫抑制作用.