NaFeEDTA fortified soy sauce showed higher iron absorption rate in Chinese females

Objective NaFeEDTA was considered as a promising iron fortificant for controlling iron deficiency anemia. Soy sauce is a suitable food carrier for iron fortification and is a popular condiment in China. Iron absorption rates of NaFeEDTA and FeSO4 were observed and compared in adult female subjects. Methods The stable isotope tracer method was used in Chinese females consuming a typical Chinese diet. Ten healthy young Chinese women were selected as subjects in the 15-day study. A plant-based diet was used based on the dietary pattern of adult women in the 1992 National Nutrition Survey. Six milligram of 54Fe in 54FeSO4 soy sauce and 3 mg 58Fe in Na58FeEDTA soy sauce were given to the same subjects in two days. Food samples and fecal samples were collected and analyzed. Results Iron absorption rates of NaFeEDTA and FeSO4 were 10.51%±2.83 and 4.73%±2.15 respectively. The 58Fe(NaFeEDTA) absorption was significantly higher than that of 54Fe(FeSO4)(P<0.01). The iron absorption rate from NaFeEDTA was 1.2 times higher than that from FeSO4 in Chinese adult women consuming a typical Chinese diet. Conclusion The higher absorption rate of NaFeEDTA suggested that NaFeEDTA would be a better iron fortificant used in soy sauce for the controlling of iron deficiency anemia in China.     

Pokemon蛋白在胃黏膜不典型增生和胃癌中的表达

目的探讨Pokemon蛋白在胃黏膜不典型增生与胃癌组织中的表达及其意义。方法应用免疫组化SP法检测43例不典型增生胃黏膜及87例胃癌组织中Pokemon蛋白的表达,以20例正常胃黏膜为对照。并联系临床病理学指标进行相关分析。结果在正常胃黏膜中Pokemon不表达或弱表达,在不典型增生胃黏膜中,阳性表达率及强度较正常胃黏膜有所增加,并随不典型增生程度的加重而增加,在胃癌组织中表达最高,并与胃癌分化程度及有无淋巴转移和肝转移有关。结论Pokemon蛋白的表达与胃癌的发生密切相关,可能参与了胃黏膜不典型增生及胃癌的发生发展。     

多媒体技术在外科手术学教学中的应用探索

外科手术学是联系基础医学和临床医学的重要桥梁，是一门实践性和技术性很强的学科；多媒体技术作为医学教学的辅助手段，应用于外科手术学教学具有许多优点。文章总结了外科手术学教学中应用多媒体技术的一些经验，并提出教学过程中应用多媒体时应注意的问题。     

Flash在图像处理中的应用

目前二维动画制作软件Flash多被用于动画制作,但用于图像处理的并不多.文章结合实践介绍了Flash软件在图像处理中的应用技巧及其优点.     

细胞表面分子在骨髓间充质干细胞向成骨细胞分化过程中的表达

目的研究成人骨髓间充质干细胞(MSCs)在诱导条件下定向分化为成骨细胞过程中,细胞表面分子的表达及变化特征。方法从人骨髓中分离有核细胞,在含有15%胎牛血清、维生素C和β-甘油磷酸钠的α-MEM培养基中培养。在培养早期加入10-8mol/L地塞米松(实验组)或保持基础培养状态(对照组1),同时部分细胞仅培养于α-MEM培养基中(对照组2)。于培养第7、12、17天分别收集实验组和各对照组细胞,用流式细胞方法观察细胞表面分子CD45、CD34、CD117、CD90和人白细胞抗原-DR(HLA-DR)的表达,并定量对比分析。结果成人骨髓MSCs在体外诱导条件下分化为具有成骨细胞特征的成熟细胞。培养第7天实验组、对照组1和对照组2均少量表达CD45,第12、17天CD45表达转为阴性。各组各时间点CD34、CD117表达均为阴性。培养第12天,实验组和各对照组细胞CD90表达均较第7天升高,以对照组升高明显。实验组细胞HLA-DR表达随着成骨细胞分化成熟逐渐上升,而对照组细胞HLA-DR表达下降。结论MSCs在诱导条件下可以向成骨细胞分化。细胞表面分子的表达在细胞分化过程中呈特征性改变,是成骨细胞分化早期的一个重要标志。     

猴免疫缺陷病毒感染的猴自身抗体和自身免疫

目的 研究猴免疫缺陷病毒（SIV）感染的猴艾滋病模型自身抗体和病理形态学的动态变化,探讨艾滋病与自身免疫的关系。方法采用间接免疫荧光法,以小鼠心、肝、脾、肺、肾和淋巴结为靶抗原测定SIV感染猴各时间点的自身抗体;采用ECV304内皮细胞株和粒细胞抗原片分别测定抗内皮细胞和粒细胞的自身抗体。并对比检查相应的淋巴结、肾、脑等脏器的病理组织学改变。结果 SIV感染后多种自身抗体比感染前升高,如抗淋巴细胞抗体、抗血管内皮细胞抗体和抗粒细胞抗体等。病理组织学检查结果显示,在淋巴结有不同程度的组织损伤;在淋巴结、大脑皮层、消化道黏膜下层、心脏间质、肾和肝窦等脏器内有比较明显的小血管病变及其诱发的病理改变。结论 猴自身抗体水平的升高及相应组织、器官的损伤是猴艾滋病自身免疫的佐证。     

胃神经内分泌肿瘤的病理学研究进展

胃神经内分泌肿瘤是起源于胃神经内分泌细胞的肿瘤。近年,在有关胃神经内分泌肿瘤的病因、病理分类、诊断、肿瘤发展过程中分子生物学变化以及治疗等方面都有了许多新的进展。现根据2000年WHO对胃内分泌肿瘤的新分类,以病理学大体观察及组织病理方面的内容为基础,着重对胃神经内分泌肿瘤在病理诊断、治疗方面的国内外进展进行总结。     

中华眼镜蛇毒抗瘤多肽对人卵巢癌HO-8910细胞的增殖抑制和Fas/FasL表达的影响

目的 探讨中华眼镜蛇毒抗瘤多肽对人卵巢癌HO-8910细胞株的抑制作用及Fas/FasL表达的影响.方法 用MTT比色法检测不同浓度中华眼镜蛇毒抗瘤多肽对HO-8910细胞的增殖抑制,RT-PCR和免疫组织化学观察原癌基因Fas/FasL表达的变化.结果 中华眼镜蛇毒抗瘤多肽对HO-8910细胞增殖抑制作用成剂量依赖性,RT-PCR和免疫组化结果显示,随着中华眼镜蛇毒抗瘤多肽作用剂量的增加,Fas/FasL基因的表达无明显变化.结论 中华眼镜蛇毒抗瘤多肽对人卵巢癌HO-8910细胞系的增殖具有明显的抑制作用,并对原癌基因Fas/FasL的表达无抑制作用.     

绿激光前列腺汽化联合腔内碎石治疗BPH并膀胱大结石

目的探讨BPH并膀胱大结石的有效微创治疗方法。方法采用绿激光前列腺汽化术联合钬激光碎石术和膀胱大力碎石钳碎石术治疗BPH并膀胱大结石22例。结果22例均一次治疗成功。手术时间90～180min,平均95min,术后1～3天拔除尿管,排尿通畅,无电切综合征、膀胱穿孔等并发症。20例随访3个月～1年,国际前列腺症状评分(IPPS)和生活质量评分(QOL)由术前(25.3±6.2)及(5.3±0.9)分下降至术后(6.5±0.8)及(1.5±0.5)分;术后复查最大尿流率(MFR)均>15ml/s。结论绿激光联合钬激光和大力碎石钳机械碎石治疗BPH并膀胱大结石安全、有效。     

The Effect of HBx Gene on the Apoptosis of Hepatic Cells

To study the effect of HBx gene on the apoptosis of the cell lines (L02, HepG2) and the interaction between HBx and X-linked inhibitor of apoptosis protein (XIAP), the apoptosis of pcDNA3.1-HBx transiently transfected cell lines (L02, HepG2) was detected by flow cytometry and the mRNA expression of XIAP was assayed by real-time RT-PCR. Our study showed (1) the mor- phology of L02/pcDNA3.1-HBx was changed and the appearance of the cells mimicked that of HepG2 cells; (2) HBx gene could be detected in L02/pcDNA3.1-HBx and HepG2/ pcDNA3.1-HBx; (3) the apoptosis rate of L02/pcDNA 3.1-HBx was higher than that of L02 cells (P<0.01) and the apoptosis rate of HepG2/pcDNA3.1-HBx was lower than that of HepG2 cells (P<0.05); (4) the XIAP expression in L02 was about 3 times that in L02/pcDNA3.1-HBx cells (P<0.01), and the expression of XIAP in HepG2/pcDNA3.1-HBx was about 4 times that in HepG2 (P<0.01). It is concluded that HBx gene may promote the apoptosis of normal hepatocytes and inhibit the apoptosis of cells of he- patic carcinoma by regulating the expression of XIAP.