LINED CAVAL-ILIAC VENOUS PROSTHESES WITH CULTURED AUTOLOGOUS ENDOTHELIAL CELLS IN NON-HUMAN PRIMATE

ＬＩＮＥＤＣＡＶＡＬ－ＩＬＩＡＣＶＥＮＯＵＳＰＲＯＳＴＨＥＳＥＳＷＩＴＨＣＵＬＴＵＲＥＤＡＵＴＯＬＯＧＯＵＳＥＮＤＯＴＨＥＬＩＡＬＣＥＬＬＳＩＮＮＯＮ－ＨＵＭＡＮＰＲＩＭＡＴＥＬＩＮＥＤＣＡＶＡＬ－ＩＬＩＡＣＶＥＮＯＵＳＰＲＯＳＴＨＥＳＥＳＷＩＴＨＣ...     

小檗碱对中性粒细胞与血管内皮细胞粘附的影响及机制探讨

目的：探讨小檗碱对中性粒细胞及血管内皮细胞粘附作用及粘附分子的影响。方法：以人脐静脉内皮细胞（ＨＵＶＥＣ）为模型,用蛋白染料染色法观察小檗碱对中性粒细胞（ＰＭＮ）与ＨＵＶＥＣ粘附作用的影响;用细胞ＥＬＩＳＡ法、ＡＰＡＡＰ细胞免疫化学染色法观察小檗碱对ＰＭＮ－ＨＵＶＥＣ粘附过程中粘附分子ＩＣＡＭ－１及ＣＤ１８表达的影响。结果：小檗碱（０－３２～８μｇｍＬ）作用于ＨＵＶＥＣ,可抑制ＰＭＮ与ＨＵＶＥＣ间的粘附,对ＩＬ－１、ＴＮＦ（１０００μｇｍＬ）诱导的ＰＭＮ－ＨＵＶＥＣ粘附增强亦有抑制作用;而小…     

黄芪多糖对淋巴细胞与血管内皮细胞粘附的影响及其分子机制

目的 从影响淋巴细胞与血管内皮细胞粘附的角度探讨黄区欧糖免疫增强作用的机制。方法 以体外培养的人脐静脉内皮细胞（ＨＵＶＥＣ）为模型,应用蛋杂料染色、细胞ＥＬＩＳＡＳ、免疫细胞化学等方法。研究黄芪多糖对淋巴细胞与血管内皮细胞粘附的影响及其分子机制。结果 黄芪多糖作用于ＨＵＶＥＣ,能促进ＨＵＶＥＣ与淋巴细胞粘附,并与ＩＬ－１、ＴＮＦ有协同增强作用,其主要分子机制为促进ＨＵＶＥＣ表面粘附分子ＣＡＭ－１的     

黄芪多糖对嗜中性粒细胞与内皮细胞粘附及粘附分子的影响

目的：通过研究黄芪多糖对嗜中性粒细胞与血管内皮细胞粘附及粘附分子的影响,探讨黄芪多糖对炎症反应的作用及其机制。方法：以黄芪多糖或黄芪多糖加ＩＬ－１ＴＮＦ处理人嗜中性粒细胞或人脐静脉内皮细胞（ＨＵＶＥＣ）后,用蛋白染料染色法研究药物对嗜中性粒细胞与内皮细胞粘附的作用,用细胞ＥＬＩＳＡ法、ＡＰＡＡＰ免疫细胞化学染色法研究药物对ＨＵＶＥＣ表面ＩＣＡＭ－１及嗜中性粒细胞表面ＣＤ１８表达的影响。结果：黄芪多糖（４０μｇｍＬ－１ｍｇｍＬ）作用于ＨＵＶＥＣ,能促进ＨＵＶＥＣ与嗜中性粒细胞粘附,并与ＩＬ－…     

生长抑素对人脐静脉张力的调节及其局部来源

目的　观察生长抑素（ＳＯＭ）是否和如何参与对人脐静脉（ＨＵＶ）张力的调节及是否存在ＨＵＶ 局部来源的ＳＯＭ。　方法　应用机械电换能器记录ＳＯＭ 对ＨＵＶ张力的影响及应用原位杂交（ＩＳＨ）技术观察体外培养人脐静脉内皮细胞（ＨＵＶＥＣ）是否表达ＳＯＭ 的ｍ ＲＮＡ。　结果　当存在ＨＵＶＥＣ时,ＳＯＭ 使ＨＵＶ明显舒张;不存在ＨＵＶＥＣ时,ＳＯＭ 并不使ＨＵＶ明显舒张。原位杂交显示体外培养ＨＵＶＥＣ出现ＳＯＭ ｍ ＲＮＡ的阳性信号,其阳性百分率受血管活性多肽（ＶＰｓ）的调节。　结论　ＨＵＶＥＣ具有合成ＳＯＭ 的能力并成为ＨＵＶ 局部ＳＯＭ 的一个重要来源,ＳＯＭ 参与了对ＨＵＶ 张力的局部调节作用（ＨＵＶＥＣ依赖性舒张ＨＵＶ）,并可能存在自身反馈机制。     

A FREQUENCY DOMAIN QUANTITATIVE MEASUREMENT METHOD FOR BLOOD FLOW VELOCITY WITH BIDIRECTIONAL DOPPLERULTRASOUND AVOIDING DOWN-BAND CHANNEL

ＡＦＲＥＱＵＥＮＣＹＤＯＭＡＩＮＱＵＡＮＴＩＴＡＴＩＶＥＭＥＡＳＵＲＥＭＥＮＴＭＥＴＨＯＤＦＯＲＢＬＯＯＤＦＬＯＷＶＥＬＯＣＩＴＹＷＩＴＨＢＩＤＩＲＥＣＴＩＯＮＡＬＤＯＰＰＬＥＲＵＬＴＲＡＳＯＵＮＤＡＶＯＩＤＩＮＧＤＯＷＮ－ＢＡＮＤＣＨＡＮＮＥＬＷａ...     

髓磷脂碱性蛋白促进单个核细胞对内皮细胞的粘附效应

目的：探讨ＭＢＰ对外周血单个核细胞（ＰＢＭＮＣ）与人脐静脉内皮细胞（ＨＵＶＥＣ）粘附性的影响,以揭示中枢神经系统（ＣＮＳ）炎症时ＰＢＭＮＣ进入ＣＮＳ的可能原因。方法：用细胞粘附试验,研究ＰＢＭＮＣ与ＨＵＶＥＣ的粘附性,用细胞免疫化学法、ＦＡＣＳ分别观察ＶＣＡＭ－１和ＩＣＡＭ－１的表达。结果：ＭＢＰ活化的ＰＢＭＮＣ与ＭＢＰ刺激的ＰＢＭＮＣ培养上清作用的ＨＵＶＥＣ的粘附性较对照有显著提高。ＩＣＡＭ＿１     

高糖、肿瘤坏死因子促进血管内皮细胞表面整合素（α_vβ_3）表达

本文采用ＥＬＩＳＡ方法检测培养的人脐静脉内皮细胞（ＨＵＶＥＣ）表面玻璃连接蛋白受体（ＶｉｔｒｏｎｅｃｔｉｎｒｅｃｅｐｔｏｒＶｎＲ即整合素家庭的α＿ｖβ＿３）的表达改变；用（５１）Ｃｒ－标记血小板（（５１）Ｃｒ－ｐｌａｔｅｌｅｔｅ，（５１）Ｃｒ－ｐＬ）检测ＨＵｖＥｃ的粘附功能；Ｆｕｒａ－２／Ａｍ负载ＥＣ，测定ＨＵＶＥＣ胞内游离钙离子浓度（［Ｃａ（２＋）］），观察了高糖、肿瘤坏死因子－α（Ｔｕｍｏｒｎｅｃｒｏｓｉｓｆａｃｔｏｒ－α，ＴＮＦ－α）对ＥＣ粘附功能的影响。结果表明：①高糖（３０ｍｍｏｌ／Ｌ）可明显促进ＥＣ与ＰＬ的粘附（ＣＰＭ值：３６１±２ｌ．９３ＶＳ２ｌ９．６７±１６．２６，ｎ＝６Ｐ＜０．０１），抗β３亚单位单抗（β３ＭｃＡｂ）可部分阻断ＥＣ与ＰＬ粘附。ＴＮＦ－α（１０００μ／ｍ１）也有相同作用（ＣＰＭ值：４ｌ０．７±１７．６ＶＳ２１９．６７±１６．２６１ｎ＝６Ｐ＜０．０１），β３ＭｃＡｂ也部分阻断ＴＮＦ－α诱导的ＥＣ－ＰＬ间的粘附。②不同浓度高糖和ＴＮＦ－α不同时间可影响ＥＣ表面的α＿ｖβ＿３表达，并且在一定范围内有浓度和时间依赖性。③高糖和ＴＮＦ－α可明显增加ＥＣ的［Ｃａ（２＋）］ｉ，上述资料提示?     

STUDY OF NOVEL MEMBRANOUS MATERIAL FOR CHARCOAL KIDNEY

ＳＴＵＤＹＯＦＮＯＶＥＬＭＥＭＢＲＡＮＯＵＳＭＡＴＥＲＩＡＬＦＯＲＣＨＡＲＣＯＡＬＫＩＤＮＥＹＳＴＵＤＹＯＦＮＯＶＥＬＭＥＭＢＲＡＮＯＵＳＭＡＴＥＲＩＡＬＦＯＲＣＨＡＲＣＯＡＬＫＩＤＮＥＹＧｕＨａｎｑｉｎｇ；ＬｕＭｏｚｕ（Ｔｉａｎｊｉｎｉｎｓｔｉｔｕ...     

THE RELATIONSHIP BETWEEN THE VOLUMINA CHANGES OF LINK ATRIUM

ＴＨＥＲＥＬＡＴＩＯＮＳＨＩＰＢＥＴＷＥＥＮＴＨＥＶＯＬＵＭＩＮＡＣＨＡＮＧＥＳＯＦＬＩＮＫＡＴＲＩＵＭＰｅｎｇＢａｏ；ＬｉｎＺｈｏｎｇＷｅｎ（ＨｏｓｐｉｔａｌｏｆＳｈｅｎｇｚｈｅｎＣｉｔｙ，Ｓｈｅｎｇｚｈｅｎ，５１８０００，Ｃｈｉｎａ）Ａｂｓｔｒａ...     

人羊膜上皮细胞上清液对人肝癌BEL-7402细胞的体外抗肿瘤作用

目的探讨人羊膜上皮细胞(h AECs)上清液对体外培养的肝癌细胞系BEL-7402细胞迁移、增殖与凋亡的影响。方法 BEL-7402细胞随机分为5组,其中对照组不加h AECs上清液,其余4组加入体积分数分别为6.25%、12.5%、25%和50%的h AECs上清液作用24 h后,通过划痕实验、MTT试验和流式细胞术检测BEL-7402细胞迁移、增殖和凋亡;Western blot法检测凋亡相关蛋白的表达量。结果 h AECs上清液能剂量依赖性地抑制BEL-7402细胞迁移、增殖并诱导凋亡(P0.05);25%和50%h AECs上清液组BEL-7402细胞caspase-3和caspase-8蛋白的切割片断蛋白定量明显高于对照组(P0.05)。结论 h AECs上清液对体外培养的BEL-7402细胞具有一定的抗肿瘤作用。     

Ultrastructure of human mast cells

Ultrastructural studies of human mast cells define their organelles and the impact of environment, development and function on their ultrastructural morphology. The studies we review here implicate lipid bodies in eicosanoid and cytokine biology, and extend the functional repertoire of secretory-storage granules to synthesis.     

人骨髓间充质干细胞向心肌样细胞分化

目的讨论小型猪心肌细胞(CMs)裂解液对人骨髓间充质干细胞(MSCs)的体外诱导分化作用。方法用5-aza、小型猪CMs裂解液二种方法体外诱导人MSCs的分化,单纯培养基(DMEM)培养为对照组,观察细胞形态改变。用细胞免疫化学、免疫荧光法检测MSCs的α-actin、cTnT、Cx43和CD31的表达,MTT法测定细胞增殖。结果小型猪CMs裂解液诱导人MSCs所得心肌样细胞(CLCs)表达cTnT、Cx43和CD31;5-aza诱导组MSCs表达cTnT和Cx43,不表达CD31;5-aza培养初期对MSCs的增殖具有明显的抑制作用,CMs裂解液促进MSCs的增殖。结论小型猪CMs裂解液培养基可以诱导人MSCs分化为心肌样细胞及内皮样细胞,并且具有很强的促细胞增殖作用,优于目前广泛研究的肌细胞诱导分化剂5-aza。本研究为大规模诱导人MSCs向CMs分化创造了条件。     

Recognition of autologous dendritic cells by human NK cells

NK cells can recognize and kill tumor as well as certain normal cells. The outcome of the NK-target interaction is determined by a balance of positive and negative signals initiated by different target cell ligands. We have previously shown that human NK cells kill CD40-transfected tumor targets efficiently, but the physiological significance of this is unclear. We now demonstrate that human NK cells can kill dendritic cells (DC), known to express CD40 and other co-stimulatory molecules. The killing was observed with polyclonal NK cells cultured short term in IL-2 as well as with NK cell clones as effectors, and with allogeneic as well as autologous DC as targets. NK cell recognition could be inhibited, but only partially, by preincubation of target cells with monoclonal antibodies against CD40, suggesting that this molecule may be one of several ligands involved. Addition of TNF-alpha of the cultures stimulated the development of a more mature DC phenotype, while addition of IL-10 resulted in a less mature phenotype, with lower expression of CD40 and other co-stimulatory molecules. Nevertheless, such DC were more NK susceptible than the differentiated DC. This may be partly explained by a reduced MHC class I expression observed on such cells, since blocking of MHC class I molecules on differentiated DC or CD94 receptors of NK cells led to increased NK susceptibility. The results show that NK cells may interact with DC, and suggest that the outcome of such interactions depend on the cytokine milieu.     

人牙周膜干细胞与牙周膜细胞生物学特性的比较

背景：牙周膜干细胞生物作用是目前牙周病治疗研究的热点,牙周膜成纤维细胞是其分化的终末功能细胞之一,也是其主要的支持细胞,两者生物学特性的差异研究鲜有报道。 目的：比较牙周膜干细胞与牙周膜细胞生物学特性的差异。 方法：用组织块法体外对牙周膜细胞以及单细胞克隆分离纯化后的人牙周膜干细胞两种细胞分别进行显微镜下形态观察,CCK8法检测并绘制2种细胞的生长曲线。流式细胞分析比较2种细胞的细胞周期以及细胞表面标记物的表达、实时PCR对2种细胞碱性磷酸酶、增殖细胞核抗原和Scleraxis基因进行检测。 结果与结论：牙周膜干细胞与牙周膜成纤维细胞外观差别明显,人牙周膜干细胞的生长曲线培养前5 d要低于牙周膜细胞,但在5 d后明显高于牙周膜细胞。人牙周膜干细胞与牙周膜细胞的细胞周期分别为41.1%和23.9%。表面标记物检测结果显示2种细胞虽有相似的表达,但在表达率差异有有显著性意义。实时荧光定量PCR结果显示,人牙周膜干细胞在碱性磷酸酶、增殖细胞核抗原以及Scleraxis基因的表达检测均高于牙周膜细胞。表明牙周膜干细胞在成骨增殖等生物学功能上比牙周膜细胞具有更强的潜能。中国组织工程研究杂志出版内容重点：干细胞;骨髓干细胞;造血干细胞;脂肪干细胞;肿瘤干细胞;胚胎干细胞;脐带脐血干细胞;干细胞诱导;干细胞分化;组织工程全文链接：     

内皮样细胞与脐静脉内皮细胞的比较

BACKGROUND: Stem cells are induced to differentiate into endothelial-like cells that can be used for the treatment of diabetic lower extremity vascular disease. However, it is unclear whether these endothelial-like cells can completely replace endothelial cells to improve vascular disease and what are the differences between endothelial-like cells and endothelial cells. OBJECTIVE: To explore the differences and similarities between endothelial-like cells and human umbilical vein endothelial cells in the aspects of morphology, function, and viability. METHODS: Umbilical cord mesenchymal stem cells and umbilical vein endothelial cells were isolated, cultured and identified using flow cytometry and immunohistochemical method. Isolated umbilical cord mesenchymal stem cells were induced in DMEM-LG/F12 containing 10 µg/L vascular endothelial growth factor, 10 µg/L basic  fibroblast growth factor and 2% fetal bovine serum to differentiate into endothelial-like cells followed by immunohistochemical identification. To compare endothelial-like cells with human umbilical vein endothelial cells, cell migration detection, active substance measurement and three-dimensional angiogenesis test were performed. RESULTS AND CONCLUSION: Isolated umbilical cord mesenchymal stem cells strongly expressed the surface markers of mesenchymal stem cells, and human umbilical vein endothelial cells strongly expressed CD31 and VWF. After induction, the umbilical cord mesenchymal stem cells were identified to highly express CD31 and VWF. Through cell migration, active substance and three-dimensional angiogenesis tests, endothelial-like cells were similar to endothelial cells in the function and activity, and superior to endothelial cells.  中国组织工程研究杂志出版内容重点：干细胞;骨髓干细胞;造血干细胞;脂肪干细胞;肿瘤干细胞;胚胎干细胞;脐带脐血干细胞;干细胞诱导;干细胞分化;组织工程     

Ultrastructural cytology of human osteosarcoma cells

Summary The cytology of 6 osteosarcomas was examined by electron microscopy. In keeping with the varied pattern of osteosarcomas seen by light microscopy several types of tumor cells could be differentiated: osteoblast-like, fibroblast-like, chondroblast-like, osteoclast-like and histiocyte-like cells. Moreover, atypical malignant mesenchymal cells and vascular spaces were present. The individual cytoplasmic organelles are not considered to be specific to particular types of cell as seen from the discussion of the significance of rough endoplasmic reticulum, microfilaments and lysosomes. Only examination of the composite pattern of subcellular organelles allows the differentiation of certain cell types. All tumor cells visible in osteosarcomas are considered as modifications of a transformed common progenitor cell. Because of the variegated cytological picture a multipotent mesenchymal cell rather than an osteoblastic cell is assumed to be the ancestor cell.Dedicated to Prof. Dr. sc. med. F. Bolck on the occasion of his 60^th birthday     

Primitive cardiac cells from human embryonic stem cells

Pluripotent stem cell-derived cardiomyocytes are currently being investigated for in vitro human heart models and as potential therapeutics for heart failure. In this study, we have developed a differentiation protocol that minimizes the need for specific human embryonic stem cell (hESC) line optimization. We first reduced the heterogeneity that exists within the starting population of bulk cultured hESCs by using cells adapted to single-cell passaging in a 2-dimensional (2D) culture format. Compared with bulk cultures, single-cell cultures comprised larger fractions of TG30(hi)/OCT4(hi) cells, corresponding to an increased expression of pluripotency markers OCT4 and NANOG, and reduced expression of early lineage-specific markers. A 2D temporal differentiation protocol was then developed, aimed at reducing the inherent heterogeneity and variability of embryoid body-based protocols, with induction of primitive streak cells using bone morphogenetic protein 4 and activin A, followed by cardiogenesis via inhibition of Wnt signaling using the small molecules IWP-4 or IWR-1. IWP-4 treatment resulted in a large percentage of cells expressing low amounts of cardiac myosin heavy chain and expression of early cardiac progenitor markers ISL1 and NKX2-5, thus indicating the production of large numbers of immature cardiomyocytes (~65,000/cm(2) or ~1.5 per input hESC). This protocol was shown to be effective in HES3, H9, and, to a lesser, extent, MEL1 hESC lines. In addition, we observed that IWR-1 induced predominantly atrial myosin light chain (MLC2a) expression, whereas IWP-4 induced expression of both atrial (MLC2a) and ventricular (MLC2v) forms. The intrinsic flexibility and scalability of this 2D protocol mean that the output population of primitive cardiomyocytes will be particularly accessible and useful for the investigation of molecular mechanisms driving terminal cardiomyocyte differentiation, and potentially for the future treatment of heart failure.