磁场对红细胞变形性影响的研究

将兔血置于０．２～１．０Ｔ范围内不同强度的恒定磁场中照射后，用激光衍射法测量红细胞的变形指数ＤＩ及积分变形指数ＩＤＩ。实验结果表明，在０．２Ｔ磁场中照射３０分钟可使红细胞的ＤＩ及ＩＤＩ明显增加，即在这一条件下磁场可改善红细胞的变形性。而磁场强度增加或照射时间延长都不利于红细胞变形能力的改善。     

额外小染色体与原发闭经(附4例报告)

我们发现4例原发闭经伴额外小染色体病例,其核型分别为;46,XX/47,XX mar;46,X,del(X)/47,X,del(X) mar;47,XX, mar;45,X/46,X, mar/46,X r.作者讨论了mar的发生率、起源、诊断、临床表现及产前诊断等问题.     

Kinetics of severe acute respiratory syndrome (SARS) coronavirus-specific antibodies in 271 laboratory-confirmed cases of SARS

The sensitivities and specificities of an immunofluorescence assay and an enzyme immunoassay for detection of antibodies specific for severe acute respiratory syndrome coronavirus (SARS-CoV) were compared for 148 laboratory-confirmed SARS cases. The appearance and persistence of SARS-CoV-specific antibodies were assessed, with immunoglobulin G detected in 59% of samples collected within 14 days and persisting for 60 to 95 days after the onset of illness.     

FD-1冷冻干燥机的研制及生物材料的冷冻干燥

观察自制冷冻干燥机冷冻干燥生物材料的效果。采用 R5 0 2压缩机和制冷剂制成 FD- 1冷冻干燥机。本实验冷冻干燥了胶原海绵、菌种及去纤酶。在冻干箱负载或空载情况下蒸发冷凝器温度均可达到 - 4 5℃ ,小冰箱可达到 - 30℃ ,冻干的胶原海绵具有许多孔洞的结构 ,冻干的菌种和去纤酶性能保持良好。 FD- 1冷冻干燥机适用于生物样品中小批量的冷冻干燥     

过敏性紫癜急性期血液流变性改变及其临床意义

为了研究过敏性紫癜（ＨＳＰ）急性期血液流变性改变及其临床意义，采用ＮＸＥ－Ｉ型锥板式粘度计，测定了２１例ＨＳＰ急性期血液流变学各项指标。结果表明，ＨＳＰ组全血粘度、血浆粘度、红细胞聚集性增多显著高于对照组；氧释放系数ＯＤ值较对照组明显降低；ＨＳＰ患儿红细胞压积、血小板计数、血清ＩｇＡ和ＩｇＭ呈明显升高。提示ＨＳＰ时存在明显的血液流变性异常，其发生与血液浓缩、高Ｉｇ血症等因素有关。及时治疗ＨＳＰ高粘滞血症对减轻症状、防止复发是十分有益的     

抗体包被对红细胞变形性影响的研究

作者对抗体包被的红为性进行研究，发现抗体包被改变了红细胞的变形性，在我们研究的抗体量范围内，抗体量越多，红细胞的变形性越小，作者从血液流变学的角度对上述结果作了讨论，并提出了通过测定其对红细胞变形性的影响来比较准确地标定抗体效价的可能性。     

Hybridization studies of cultured human pituitary prl and gh producing adenoma cells: Effects of thyrotropin-releasing hormone,somatostatin, and phorbol ester

The effects of the hypothalamic hormones, thyrotropin-releasing hormone (TRH), and somatostatin (SRIH), and of phorbol 12-myristate 13-acetate (PMA) on PRL and GH secretion and messenger RNA (mRNA) levels were analyzed in 10 GH and/or PRL producing adenomas after culturing the tumor cells in the presence of these secretagogues for 7 days. The expression of chromogranin A and B mRNAs was also examined. All four of the clinically diagnosed GH adenomas expressed or secreted both GH and PRL while four of six clinically diagnosed prolactinomas produced or secreted both PRL and GH. Prolactinomas had less than 10% of tumor cells expressing chromogranin A mRNA while more than 40% of the adenoma cells expressed chromogranin B mRNA. TRH stimulated PRL secretion and increased PRL mRNA levels while SRIH decreased GH secretion and mRNA expression in some cases. Unexpectedly, PMA stimulated PRL mRNA levels four- to sevenfold above control levels in two adenomas and generally stimulated chromogranin A and B mRNA expression but not GH mRNA, as determined by Northern hybridization and in situ hybridization analyses. These results indicate that cultured prolactinoma cells express significantly more chromogranin B mRNA than chromogranin A mRNA, and that PMA increases PRL mRNA expression in some prolactinomas, although the effect of PMA on various adenomas reflects the heterogeneity of these tumors with respect to protein kinase C stimulation.     

Rb基因在鼻咽癌中存在状态的研究

首次应用生物素－１４－ｄＵＴＰ标记Ｒｂ３．８ｋｂ探针，结合亲合素－碱性磷酸酶发光及自显影法，对Ｒｂ基因在鼻咽癌中存在状态进行了研究。杂交结果表明，３例正常胎儿鼻咽组织出现分子量为１２．８、１０．２、８．０、６．２、５．６、５．２及４．８ｋｂ的７条杂文区带，１１例鼻咽癌组织均发现有Ｒｂ基因缺失或失活，其中４例为５．６ｋｂ片段缺失，４例为４．８ｋｂ缺失并有２例伴５．６ｋｂ减弱，２例为１０．２ｋｂ缺失，１例为５．６及５．２ｋｂ片段显著减弱，说明在上述１１例鼻咽癌中均有Ｒｂ基因的改变。这种高频率的异常变化，提示Ｒｂ基因的缺失或失活，与鼻咽癌的发生有密切关系。     

“Smart” Materials for Biosensing Devices: Cell-Mimicking Supramolecular Assemblies and Colorimetric Detection of Pathogenic Agents

Mimicking cell membrane and the biomolecular recognition associated with membranes represents a great technical challenge, yet it has opened doors to innovative diagnostic and therapeutic methods. Our work has focused on design and synthesis of a class of smart materials exploiting biological principals for use in biosensors: these materials are functional polymeric assemblies that mimic the cell membrane and conveniently report the presence of pathogens with a color change. Biologically active cell membrane components are incorporated into conjugated polymers with desirable optical properties and the binding of the target molecules onto the material triggers conformational and electronic shifts that are reflected in a chromatic change (a so-called biochromic shift) that is conveniently observed and recorded. Langmuir–Blodgett thin films and vesicle bilayers provide ideal configurations for precise delivery of the biological binding entity to the sensing interface, and for control of molecular orientation for effective biomolecular interaction. Polydiacetylenic membrane-mimicking materials containing cell surface receptor gangliosides and sialic acid residues, respectively were formulated into these architectures and used for colorimetric detection of bacterial toxins and influenza virus. One advantage of these biochromic conjugated polymer (BCP) sensors is that their molecular recognition and signal transduction functionalities are resident in a single functional unit, making them amenable to convenient microfabrication and use.