651名幼儿园儿童体检资料分析

目的:研究唐山市幼儿园儿童生长发育及营养状况。方法:采用全国统一制定的测量方法,测量儿童体重、身高并计算Z评分;同时对视力、龋齿、血红蛋白、乙肝表面抗原及抗体进行检查。以此评价唐山市区4所幼儿园651名2~6岁学龄前儿童的生长发育和营养现状。结果:唐山市651名学龄前儿童获得WAZ、HAZ、WHZ值为0.5883、-0.0054、-0.3958。男女间在WHZ上存在显著差异,另外两种评分男女间无显著差异。总的低体重率为0.5%、生长迟缓率为2.2%、消瘦率为7.4%;总的肥胖发生率为18.74%、超重发生率为17.20%,明显高于1998年全国城市儿童营养调查的结果。结论:唐山市区学龄前儿童的生长发育和营养状况良好,但仍不可忽视营养过剩的问题。     

体外培养红细胞研究进展

现代科学技术的高速发展、基础医学研究的不断深入以及各种高新技术不断向输血领域渗透,都推动着输血医学特别是临床输血医学发生日新月异的变化.     

破解癌细胞化疗耐药之谜

由中国人民解放军军事医学科学院章扬培教授等人共同完成的“06-甲基鸟嘌呤-DNA-甲基转移酶与肿瘤预见性化疗新策略的研究”，荣获2004年国家科技进步奖二等奖。     

中风的危害性

中风之所以被认为严重威胁人类健康,是因为该病具有发病率高、死亡率高、致残率高、复发率高和并发症多的“四高一多”特点。     

唐山市路北区883例妇女妇女病普查结果分析

目的:调查唐山市妇女病发病现状及其影响因素,为今后的防治工作提供依据。方法:采用普查的方法,应用河北省妇女病检查表,由路北区妇幼保健所专业医师检查并填写检查表。结果:妇女病总发病率为60.8%,各种疾病发病率依次为:宫颈糜烂30.0%,乳腺疾病20.1%,卵巢疾病7.8%,子宫肌瘤7.2%,各种阴道炎3.2%,盆腔炎2.0%,附件炎0.8%,其他疾病0.9%。结论:妇女疾病与年龄、避孕套的使用有关。     

体外培养血小板研究进展

目前临床输注血小板(plateleta,Plts)主要来自无偿献血者.但是血小板体外保存时间较短,容易失活.并且,无偿献血者来源的血小板的微生物检测项目受限,病毒感染存在窗口期.     

培养条件对体外诱导造血干/祖细胞向血小板定向增殖与分化的影响

目的观察3种不同培养基以及细胞接种密度对体外诱导造血干/祖细胞向血小板方向增殖和分化的影响。方法用添加干细胞因子(SCF)和促血小板生成素(TPO)等细胞因子的无血清培养基(StemSpan(SFEM和X-VIVO10)或IMDM/10%FBS来扩增脐血CD34+细胞向血小板定向分化,比较不同培养基的培养效果;CD34+细胞接种浓度为5×103/ml、104/ml和105/ml,比较不同接种浓度对扩增效果的影响。结果培养d 14、d 24和d 29时,StemSpan(SFEM培养基体系中细胞分别扩增了(11 000±577.35)、(196 666.67±14 529.66)和(176 666.67±8 819.17)倍,显著高于X-VIVO10和IMDM/10%FBS组,其中在d 24和d 29时,巨核系细胞所占比例分别是(54.57±2.32)%和(69.4±2.02)%,显著高于X-VIVO10和IMDM/10%FBS组。培养14 d后初始接种浓度为104/ml的CD34+细胞在StemSpan(SFEM培养基体系中扩增(11 000±577.35)倍,显著高于初始接种浓度为5×103/ml和105/ml组。结论和X-VIVO10和IMDM/10%FBS相比,StemSpan(SPEM培养基最有利于脐血CD34+细胞体外向血小板定向扩增和分化;104/ml的CD34+细胞接种密度最有利于细胞扩增和分化。     

EXPRESSION OF HUMAN α-GALACTOSIDASE AND α1,2-FUCOSYL-TRANSFERASE GENES MODIFIES THE CELL SURFACE GALα1,3GAL ANTIGEN AND CONFERS RESISTANCE TO HUMAN SERUM-MEDIATED CYTOLYSIS

Objective To explore the strategies which reduce the amount of xenoantigen Galα1, 3 Gal. Methods Human α-galactosidase gene and α 1,2-fucosyltransferase gene were transferred into cultured porcine vascular endothelial cells PEDSV.15 and human α-galactosidase transgenic mice were produced. The Galα 1,3Gal on the cell surface and susceptibility of cells to human antibody-mediated lysis were analyzed. Results Human α-galactosidase gene alone reduced 78% of Galα1,3Gal on PEDSV.15 cell surface while human α-galactosidase combined with α 1,2-fucosyltransferase genes removed Galα 1,3Gal completely. Decrease of Galα1,3Gal could reduce susceptibility of cells to human antibody-mediated lysis, especially during co-expression of α-galactosidase gene and α1,2-fucosyltransferase gene. RT-PCR indicated positive human α-galactosidase gene expression in all organs of positive human α-galactosidase transgenic F1 mice including heart, liver, kidney, lung, and spleen, the amount of Galα1,3Gal antigens on which was reduced largely. 58% of spleen cells from F1 mice were destroyed by complement-mediated lysis compared with 24% of those from normal mice. Conclusions Human α-galactosidase gene and α1,2-fucosyltransferase gene effectively reduce the expression of Galα1,3Gal antigens on endothelial cell surface and confers resistance to human serummediated cytolysis. The expression of human α-galactosidase in mice can also eliminate the Galα1,3Gal antigens in most tissues and decrease the susceptibility of spleen cells to human serum-mediated cytolysis.     

HER2/neu肽诱导BALB/c小鼠产生特异性CTL及其抑瘤作用的研究

目的：探讨来源于ＨＥＲ２／ｎｅｕ原癌蛋白的多肽诱导特异性细胞免疫应答及其在体内的抗癌效应。方法：利用合成的２个具有小鼠Ｈ－２Ｋ＾ｄ分子结合基序的ＨＥＲ２／ｎｅｕ肽作为肿瘤排斥抗原,在体外刺激小鼠淋巴细胞以及皮下免疫小鼠,观察淋巴细胞的增殖能力、ＣＴＬ的杀伤活性以及ＨＥＲ２／ｎｅｕ肽的抑瘤作用。结果：ＨＥＲ２／ｎｅｕ肽在体内和体外对ＢＡＬＢ／ｃ小鼠淋巴细胞的增殖都有显显的促进作用。ＨＥＲ２／ｎｅｕ肽免疫ＢＡＬＢ／ｃ小鼠后,可以从小鼠淋巴细胞中诱导出肽特异性ＣＴＬ,这些ＣＴＬ可以特异地杀伤ＨＥＲ２／ｎｅｕ阳性ＳＰ２／０细胞,而对ＨＥＲ２／ｎｅｕ阴性ＳＰ２／０细胞却无明显的杀伤活性。ＳＰ２／０ＨＥＲ２细胞在ＨＥＲ２／ｎｅｕ肽免疫小鼠体内的生长受到抑制。结论：研究结果表明ＨＥＲ２／ｎｅｕ肽可以起到一定的抑瘤保护作用,提     

EXPRESSION OF HUMAN α-GALACTOSIDASE AND α1,2-FUCOSYLTRANSFERASE GENES MODIFIES THE CELL SURFACE GALα1,3GAL ANTIGEN AND CONFERS RESISTANCE TO HUMAN SERUM-MEDIATED CYTOLYSIS

Objective To explore the strategies which reduce the amount of xenoantigen Galα1, 3 Gal. Methods Human α-galactosidase gene and α1,2-fucosyhransferase gene were transferred into cultured porcine vascular endothelial cells PEDSV. 15 and human α-galactosidase transgenic mice were produced. The Galα1,3Gal on the cell surface and susceptibility of cells to human antibody-mediated lysis were analyzed. Results Human α-galactosidase gene alone reduced 78% of Galα1,3Gal on PEDSV. 15 cell surface while human α-galactosidase combined with α1,2-fucosyltransferase genes removed Galα1,3Gal completely. Decrease of Galα1,3Gal could reduce susceptibility of cells to human antibody-mediated lysis, especially during co-expression of α-galactosidase gene and α1,2-fucosyltransferase gene, RT-PCR indicated positive human α-galactosidase gene expression in all organs of positive human α-galacto-sidase transgenic F1 mice including heart, liver, kidney, lung, and spleen, the amount of Galα1,3Gal antigens on which was reduced largely. 58% of spleen cells from F1 mice were destroyed by complement-mediated lysis compared with 24% of those from normal mice. Conclusions Human α-galactosidase gene and α1,2-fucosyltransferase gene effectively reduce the expression of Galα1,3Gal antigens on endothelial cell surface and confers resistance to human serummediated cytolysis. The expression of human α-galactosidase in mice can also eliminate the Galα1,3Gal antigens in most tissues and decrease the susceptibility of spleen cells to human serum-mediated cytolysis.