U46619对培养的人气道平滑肌细胞增殖的作用

目的和方法：研究Ｕ４６６１９（９,１１－ｄｉｄｅｏｘｙ－１１α,９α－ｅｐｏｘｙｍｅｔｈａｎｏ－ｐｒｏｓｔａｇｌａｎｄｉｎＦ２α）对培养的人气管平滑肌细胞增殖的作用。分离人的气管平滑肌细胞并且进行传代培养。在培养基中加入各种浓度的Ｕ４６６１９,计数细胞并且测定［３Ｈ］－胸腺嘧啶核苷（［３Ｈ］－ＴｄＲ）掺入量和三磷酸肌醇［Ｉｎｓ（１,４,５）Ｐ３］累积量。结果：Ｕ４６６１９在一定范围内（１ｎｍｏｌ／Ｌ～１００ｎｍｏｌ／Ｌ）以浓度依赖的方式增加人气管平滑肌的细胞数（Ｐ＜００１）。Ｕ４６６１９也增加［３Ｈ］－ＴｄＲ的掺入量和Ｉｎｓ（１,４,５）Ｐ３的累积量（Ｐ＜００１）。磷脂酶Ｃ抑制剂新霉素阻止Ｉｎｓ（１,４,５）Ｐ３累积量的增加（Ｐ＜００１）,但对Ｕ４６６１９的有丝分裂原的活性没有作用。结论：显示Ｕ４６６１９刺激培养的人气管平滑肌细胞增殖。     

系膜增殖性肾炎中花生四烯酸产物对系膜细胞增殖的作用

在抗Ｔｈｙ１．１抗体引起的大鼠系膜增殖性肾炎中，肾小球的增殖性细胞核抗原（ＰＣＮＡ）阳性细胞增多，＾３Ｈ－胸腺嘧啶核苷（＾３Ｈ－ｔｈｙｍｉｄｉｎｅ，＾３Ｈ－ＴｄＲ）掺入法测定的肾小球增殖活性（ＧＰＡ）升高。对肾炎鼠给予５－脂氧合酶抑制剂ＭＫ８８６或血栓素（ＴＸＡ２）合成酶抑制剂Ｆｕｒｅｇｒｅｌａｔｅ或１２－脂氧合酶抑制剂Ｂａｉｃａｌｅｉｎ进行处理，可分别抑制肾小球合成的白三烯（ＬＴ）Ｂ４及１２－羟     

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?     

应用ONE-TOUCHⅡ型血糖监测仪测定毛细血管全血糖

应用ＯＮＥ－ＴＯＵＣＨⅡ型血糖监测仪测定毛细血管全血糖上海市内分泌研究所应用ＯＮＥ－ＴＯＵＣＨⅡ型血糖仪测定毛细血管全血糖（ＣＢＧ）１２６４例次，并与ＢｅｃｋｍａｎＣＸ４自动生化分析仪测定静脉血浆糖（ＶＰＧ）比较。结果表明，ＶＰＧ较ＣＢＧ高１０．２±...     

口服痢疾杆菌免疫后小白鼠GALT中L3T4~ 和Lyt2~ 细胞亚群的研究

为探讨福氏痢疾杆菌（Ｆ２ａ）感染后胃肠相关淋巴组织（ＧＡＬＴ）中的免疫应答状况，对口服Ｆ２ａ免疫后，ＢＡＬＢ／ｃ小鼠ＧＡＬＴ效应部位上皮内（ＩＥ）和固有膜内（ＬＰ）淋巴细胞表型进行了ＦＡＣＳ分析，并与脾、肠系膜淋巴结（ＭＬＮ）和Ｐｅｙｅｒ结（ＰＰ）中的变化进行了比较。发现脾Ｌ３Ｔ４＋和Ｌｙｔ２＋细胞亚群的变化相对很小；ＭＬＮ中的变化较大，免疫后第４天Ｌ３Ｔ４＋和Ｌｙｔ２＋细胞都明显增加；ＰＰ中的变化明显，于末次免疫后第１天，Ｌｙｔ２＋细胞明显增加；上皮内Ｌ３Ｔ４＋细胞在前１０天内相对增加；固有膜内Ｌ３Ｔ４＋细胞在前７天不断增加，但因Ｌｙｔ２＋在第１天大量增加，Ｌ３Ｔ４＋／Ｌｙｔ２＋在第１天明显变小。这些结果表明：Ｆ２ａ多次口服免疫后，Ｔ细胞免疫应答主要发生于ＧＡＬＴ中；ＰＰ中的变化可能早于ＭＬＮ；ＩＥ可能直接对通过上皮的抗原进行免疫应答；除Ｌ３Ｔ４＋Ｔ细胞外，Ｌｙｔ２＋Ｔ细胞可能在粘膜免疫应答的调节中起着独特而十分重要的作用。     

CD59在sMAC诱导EL—4细胞增殖效应中的作用

以表达人ＣＤ５９ｃＤＮＡ及ＣＤ５９－ＴＭｃＤＮＡ的小鼠胸腺瘤细胞为研究对象,探讨了ＣＤ５９在ｓＭＡＣ诱导ＥＬ－４细胞增殖效应中的作用。结果发现;１）用抗体交地ＣＤ５９／ＥＬ－４细胞的增殖有促进效应,而对ＣＤ５９－ＴＭ／ＥＬ－４细胞的增殖无明显影响;２）ｓＭＡＣ对ＣＤ５９／ＥＬ－４细胞的增殖有促进作用,而对ＥＬ－４及ＣＤ５９－ＴＭ／ＥＬ－４细胞则均未出现上述现象;３）阻断信号传导的蛋白酪氨酸激酶途径     

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

ＬＩＮＥＤＣＡＶＡＬ－ＩＬＩＡＣＶＥＮＯＵＳＰＲＯＳＴＨＥＳＥＳＷＩＴＨＣＵＬＴＵＲＥＤＡＵＴＯＬＯＧＯＵＳＥＮＤＯＴＨＥＬＩＡＬＣＥＬＬＳＩＮＮＯＮ－ＨＵＭＡＮＰＲＩＭＡＴＥＬＩＮＥＤＣＡＶＡＬ－ＩＬＩＡＣＶＥＮＯＵＳＰＲＯＳＴＨＥＳＥＳＷＩＴＨＣ...     

BIOLOGIC HEMOSTATIC GLUE IN GENERAL SURGERY

ＢＩＯＬＯＧＩＣＨＥＭＯＳＴＡＴＩＣＧＬＵＥＩＮＧＥＮＥＲＡＬＳＵＲＧＥＲＹＢＩＯＬＯＧＩＣＨＥＭＯＳＴＡＴＩＣＧＬＵＥＩＮＧＥＮＥＲＡＬＳＵＲＧＥＲＹＨｕＹｉ－ｚｅ（ＤｅｐａｒｔｍｅｎｔｏｆＳｕｒｇｅｒｙ，ＳｅｃｏｎｄＡｆｆｉｌｉａｔｅｄＨｏｓｐｉ...     

静脉注射牛磺酸和内毒素后家兔血清Fe2+、Zn2+、Cu2+含量变化

实验将１６只新西兰兔随机分为４组,由耳缘静脉注射被试物：１－ＮＳ（０－９％ＮａＣｌ１ｍＬｋｇ）;２－Ｔａｕ（３ｍｍｏｌｋｇ）;３－ＥＴ（１００ＥＵｋｇ）;４．ＥＴ（１００ＥＵｋｇ）＋Ｔａｕ（３ｍｍｏｌｋｇ）。在注射后４ｈ从颈动脉取血,离心取血清,用原子分光光度法检测血清Ｆｅ２＋、Ｚｎ２＋、Ｃｕ２＋含量结果见表１：表１　４组家兔血清Ｆｅ２＋、Ｚｎ２＋、Ｃｕ２＋含量（ｍｇＬ,珋ｘ±ｓ,ｎ＝４）ＧｒｏｕｐＦｅ２＋Ｚｎ２＋Ｃｕ２＋ＮＳ３－６１±０－７７１－２２±０－５５０－５７±０－１７Ｔａ…     

驻极体技术改进的脂质体包封血红蛋白及其对体外血？…

为了研究脂质体包封血红蛋白（Ｌｉｐｏｓｏｍｅ Ｅｎｃａｐｓｕｌａｔｅｄ Ｈｅｍｏｇｌｏｂｉｎ，ＬＥＨ）的不同带电性能对体外血液流变性的影响，用驻极体技术制备了四种不同带电性能的ＬＥＨ。利用热刺激去极化电流法（Ｔｈｅｒｍａｌｌｙ Ｓｔｉｍｕｌａｔ－ｅｄ Ｄｅｐｏｌａｒｉｚａｔｉｏｎ Ｃｕｒｒｅｎｔ，ＴＳＤＣ）对它们的驻极体性能进行了测试，发现４＾＃ＬＥＨ（主峰温度Ｔａ＝１２℃），主峰电流Ｉａ＝－５．     

The RhoA-ROCK-PTEN pathway as a molecular switch for anchorage dependent cell behavior

The proliferation of anchorage-dependent cells of mesenchymal origin requires the attachment of the cells to substrates. Thus, cells that are poorly attached to substrates exhibit retarded cell cycle progression or apoptotic death. A major disadvantage of most polymers used in tissue engineering is their hydrophobicity; hydrophobic surfaces do not allow cells to attach firmly and, therefore, do not allow normal proliferation rates. In this study, we investigated the molecular mechanism underlying the reduced proliferation rate of cells that are poorly attached to substrates. There was an inverse relationship between the activity of the small GTPase RhoA (RhoA) and the cell proliferation rate. RhoA activity correlated inversely with the strength of cell adhesion to the substrates. The high RhoA activity in the cells poorly attached to substrates caused an increase in the activity of Rho-associated kinase (ROCK), a well-known effector of RhoA that upregulated the activity of phosphatase and tensin homolog (PTEN). The resulting activated PTEN downregulated Akt activity, which is essential for cell proliferation. Thus, the cells that were poorly attached to substrates showed low levels of cell proliferation because the RhoA-ROCK-PTEN pathway was hyperactive. In addition, RhoA activity seemed to be related to focal adhesion kinase (FAK) activity. Weak FAK activity in these poorly attached cells failed to downregulate the high RhoA activity that restrained cell proliferation. Interestingly, reducing the expression of any component of the RhoA-ROCK-PTEN pathway rescued the proliferation rate without physico-chemical surface modifications. Based on these results, we suggest that the RhoA-ROCK-PTEN pathway acts as a molecular switch to control cell proliferation and determine anchorage dependence. In cells that are poorly attached to substrates, its inhibition is sufficient to restore cell proliferation without the need for physico-chemical modification of the material surface.     

力学应变对体外培养动物细胞的影响

介绍了生物力学领域中细胞生长、增殖与分泌方面的实验研究进展.着重介绍了基底加载实验中不同环境对细胞分裂与增殖的作用;力学载荷对细胞黏附及生长的影响;力学应变对体外培养成骨细胞增殖与分泌的影响;流体环境对细胞生长增殖的作用.     

可对细胞施加双向应变的体外培养系统

为考察体外培养细胞在动应变作用下的响应，参考Winston等人的方法，我们制作了一套细胞体外培养系统，培养皿用有机玻璃作成，培养皿底为硅橡胶膜，下面有一封闭压力腔，通过对硅橡胶管和挤压轮间隙的调整，压力腔内的液压使硅橡胶膜产生设计应变，其应变范围可从0～4％调整，改变步进电机的转动方式，加载频率可从0．1～5Hz变化。     

E-cadherin表达缺失在白血病细胞行为中的作用

目的:确定上皮-钙黏蛋白(E-cadherin)表达缺失在白血病细胞行为中的作用,最终阐明E-cadherin介导的骨髓微环境与造血细胞相互作用改变在白血病发生中的作用。 方法:细胞黏附实验测定 HL-60细胞经5-氮杂脱氧胞苷（5-Aza-CdR）诱导E-cadherin表达后细胞黏附能力的改变,MTT法测定细胞增殖能力,细胞迁移实验确定细胞的迁移能力。结果:HL-60细胞经5-Aza-CdR诱导E-cadherin表达后,其对E-cadherin-Fc的黏附能力增加,细胞在E-cadherin-Fc上的增殖能力下降,细胞黏附导致细胞迁移能力下降。结论:白血病细胞中由于E-cadherin表达丧失,引起细胞黏附降低,增殖能力增强,细胞迁移活跃,表明E-cadherin表达缺失与白血病细胞行为的获得有关。     

蛇六谷提取物抑制K562细胞增殖并诱导分化的作用

目的:探讨蛇六谷提取物(TuAKe)抑制人慢性髓系白血病K562细胞增殖和诱导分化的作用机制。方法:不同浓度的TuAKe处理K562细胞,MTT比色法和半固体集落形成实验检测K562细胞的增殖能力;瑞氏-姬姆萨染色观察细胞形态;流式细胞术检测分化相关抗原CD11b、CD14和CD42b的阳性表达率;Western blot法检测细胞周期蛋白依赖性激酶2(CDK2)、细胞周期蛋白E1(cyclin E1)和红系分化核转录因子GATA-1的蛋白表达水平。结果:TuAKe能够抑制K562细胞增殖,改变细胞形态,抑制K562细胞进入S期,并阻滞在G_2/M期,提高分化相关抗原CD11b、CD14和CD42b阳性表达率,上调GATA-1蛋白表达,同时下调CDK2和cyclin E1蛋白表达(P0.05)。结论:TuAKe可能通过调控细胞周期抑制K562细胞增殖,同时诱导K562细胞多向分化。     

Targeting cells in motion: Migrating toward improved therapies

The development of clinical therapeutics that interfere with the migration of leukocytes has revolutionized the treatment of multiple sclerosis and holds great promise for the treatment of a wide range of inflammatory diseases. As the molecules essential for the multi‐step adhesion cascade that mediates cellular migration have been elucidated, the number of potential targets available to modulate leukocyte trafficking has increased exponentially. In this Viewpoint, we briefly review our current understanding of these mole‐cular targets and how these targets vary by tissue and leukocyte subset with emphasis on T cells. We then describe the two currently approved therapeutics that target cell migration, natalizumab and fingolimod, and discuss how an improved understanding of their function could pave the way for the development of safer and more efficacious therapies for inflammatory and autoimmune diseases.     

自体甲状腺组织与干细胞移植治疗甲状腺功能减退症的研究进展

不可逆性甲减患者需要终身服用甲状腺激素，对患者的日常工作和生活造成了很大的不便。随着近年来对自体甲状腺组织与干细胞移植研究的进展，有望解决甲减病人终身服药这一问题。自体甲状腺组织移植的动物实验以及人体试验均表明：甲状腺移植物不但能够存活，而且能够发挥作用。最新的胚胎干细胞（Embryonic stemcell，ESC）研究证明，ESC可以分化为甲状腺滤泡细胞。     

Self-loading and cell culture in one layer microfluidic devices

We report on a simple method for self loading and culture of mammalian cells in microfluidic multi-chambers for high throughput screening. The device was obtained by using one layer soft lithography with polydimethylsiloxane (PDMS) and thermal bonding on a glass slide. Self loading of cell suspension could be possible after degassing of the PDMS device for 30 min. Both cell loading efficiency and cell proliferation behaviors have been analyzed with triangle chambers of different sizes, all connected to the main flow channels with small entrances. We found that the number of cells loaded into the micro-chamber increased with the side length of the triangle, showing well size dependence and that self loading at a single cell level was possible for small chambers. For large chambers, the cell area density after loading and proliferation is however quite heterogeneous. For demonstration, HeLa cell growth behavior has been followed for 11 days until the total area of the largest chambers was fully filled.