鱼油对大鼠细胞膜脂流动性的影响

研究了鱼油对脓毒症大鼠细胞膜脂流动性的影响。结果，正常大鼠肝、心、脾、肺、肾、脑、胸大肌及红细胞膜脂的流动性明显不同。脓毒症组大鼠肝、肺和红细胞膜脂的流动性明显降低（ｐ〈０．０５），肝细胞膜脂相变温度升高，当预先给脓毒症大服用４周鱼油时，肝、肺、肾、脑及红细胞膜的流动性明显增加（Ｐ〈０．０１和Ｐ〈０．０５），肝细胞膜脂相变温度降低。提示鱼油有降低炎症大鼠膜脂相变温度，改善膜脂流动状态的作用，推测鱼     

藏药二十六味余甘子丸和藏红花粗提物对缺氧大鼠肺动脉高压 …

观察二十六味余甘子丸和藏红花粗提物对缺氧大鼠肺动脉压及血液流变学的作用。方法：１０％常压缺氧３－５周,同时用上述两种药物灌胃,右心导管测肺动脉压,毛细血管离心法测红细胞压积,旋转粘度计测血流粘度,荧光偏振法测定红细胞膜流动性,微孔滤法测红细胞压积,旋转粘计测血液粘度,荧光偏振法测红细胞膜流动性,微孔滤法     

藏药二十六味余甘子丸和藏红花粗提物对缺氧大鼠肺动脉高压和血液流变学的影响

目的：观察二十六味余甘子丸和藏红花粗提物对缺氧大鼠肺动脉压及血液流变学的作用。方法：１０％常压缺氧３～５周,同时用上述两种药物灌胃,右心导管测肺动脉压,毛细血管离心法测红细胞压积,旋转粘度计测血液粘度,荧光偏振法测红细胞膜流动性,微孔滤法测红细胞变形性。结果：所用两种药物均可以降低缺氧引起的肺动脉高压和减轻右心室肥厚。但对红细胞压积、全血粘度、红细胞膜流动性和红细胞变形性无明显影响。结论：这两种药物的降缺氧大鼠肺动脉高压作用,是主要通过改善肺循环而实现的。     

青紫型先天性心脏病红细胞膜流动性变化及与血液流变性的关系

应用荧光偏振法测定31例青紫型先天性心脏病患儿红细胞膜微粘度及血液流变学指标。发现息儿红细胞膜微粘度、全血粘度、红细胞比积、红细胞聚集指数及刚性指数均显著高于正常组(P<0.01);膜微粘度与全血粘度、红细胞刚性指数呈明显正相关(P<0.01)。研究表明,青紫型先天性心脏病红细胞膜微粘度增加、流动性降低,可能是引起红细胞变形性差、血液粘度增高的主要原因之一。     

膜蛋白交联对红细胞膜变形性及流动性的影响

本文通过不同浓度戊二醛作用于红细胞膜。用新型激光衍射法测量了这些红细胞样品的弹性模量 E和膜粘度 μm。同时通过 DPH标记的萤光偏振法测定了这些红细胞膜的流动性 ,并采用 MSL标记的电子自旋共振波谱技术 (ESR)测量了红细胞膜蛋白运动性的变化 ,并取得了与新型激光衍射法一致的结果。发现膜蛋白构象发生改变 ,膜脂流动性下降 ,红细胞膜剪切弹性模量 (E)和表面粘度 (μm)均呈上升趋势 ,红细胞变形能力下降。并对上述红细胞膜结构改变所引起的微观流变特性的变化进行了初步探讨     

膜蛋白交联对红细胞变膜变形性及流动性的影响

本文通过不同浓度戊二醛作用于红细胞膜,用新型激光衍射法测量这些红细胞样品的弹性模量Ｅ和膜粘度μｍ,同时通过ＤＰＨ标记的萤光偏振法测定了这些红细胞膜的流动性,并采用ＭＳＬ标记的电子自旋共振波谱技术（ＥＳＲ）测量了红细胞膜蛋白运动性的变化,并取得了与新型激光衍射法一致的结果,发现膜蛋白构象发生改变,膜脂流动性下降,红细胞膜剪切弹性模量（Ｅ）和表面粘度（μｍ）均呈上升趋势,红细胞变形能力下降,并对上述红     

失血性休克条件下磷脂酶A2（PLA2）和细胞膜脂流动性的改变

本研究采用家兔失血性休克模型，测定失血性休克条件下血浆和组织ＰＬＡ＿２活性的变化和红细胞膜流动性的改变。结果表明失血性休克前和休克后１、２、５小时血浆ＰＬＡ＿２分别为４６．９±１２．２ｍＭ／Ｌ、９４．０±５０．０、１１９．２±６２．４、１７４．５±８５．３ｍＭ／Ｌ，休克后血浆ＰＬＡ＿２比伤前显著升高（Ｐ＜０．０１），为伤前的２．０、２．５、３．７倍。失血性休克５ｈ后肝、心、肺、肠粘膜中ＰＬＡ＿２含量为假手术组的２．４７５、３．４７５、３．３３９、４．６５７倍，显著高于假手术组。同时失血性休克时红细胞膜流动性降低，膜脂分子排列有序性升高，细胞膜荧光偏振度升高，红细胞膜脂区微粘度升高。血浆ＰＬＡ＿２的升高和细胞膜流动性改变呈显著正相关（ｒ＞０．９３）。结果说明：失血性休克时ＰＬＡ＿２水平升高可能是血液动力学衰竭和膜损伤的重要原因，ＰＬＡ＿２是失血性休克的一个关键酶和重要的体液因子。     

中重度烧伤早期红细胞膜流动性的实验研究和临床观察

采用ＤＰＨ荧光探针标记、荧光测定和光镜观察烧伤大鼠中重度烫伤早期红细胞膜流动性、血浆过氧化脂质含量、红细胞异形率的动态变化，以及不同的处理方法对其影响。同时对同期１０例中重度烧伤病进行观察，发现中重度烧伤早期红细胞膜流动性明显下降，血浆脂质过氧化物增多，红细胞异形率增高，这些改变与烧伤面积成正相关，提示烧伤后氧自由基是损伤红细胞膜流动性的因素之一。应用抗自由基药物有保护红细胞膜结构和功能的作用，有     

加味佛手散对大鼠红细胞膜微粘度及超微结构的影响

以被动吸烟雄鼠及孕鼠为模型，探讨加味佛手散对红细胞膜流动性及红细胞超微结构的作用。用荧光探剂ＡＮＳ和ＤＰＨ分别标记红细胞膜脂的不同区段，观察加味佛手散对红细胞膜流动性的影响，结果显示，除ＤＰＨ标记的孕鼠红细胞膜流动性外，其它各组模型动物膜脂流动性明显低于相应对照组及用药组（Ｐ均＜０．０１）；扫描电镜及透射电镜下异形红细胞数，模型组明显多于对照组及用药组（Ｐ均＜０．００１）。用药组以上各项指标明显改善，而与对照组无明显差异（Ｐ均＞０．０５）。研究结果提示，加味佛手散有保护红细胞正常膜脂流动性及超微结构的作用，从而有利于改善红细胞的变形能力，增加微循环血流灌注     

高渗盐溶液治疗对烧冲复合伤后血液流变学的作用

为了观察烧冲复合伤后高渗溶液治疗对血液流变学的作用及可能机制，观察了致伤后的血浆和全血粘度，全血还原粘度的变化，同时用微管吸吮法观测了大鼠烧伤后高渗盐溶液治疗对红细胞膜粘弹性的影响。结果显示，伤后致伤对照全血粘度和还原粘度均明显迅速升高，血浆粘度在２４ｈ时也明显增加；烧伤后大鼠红细胞粘性系数和弹性模量都非常显著地升高；     

Effects of Blood on Blood Culture Medium

The morphological and biochemical changes that occur after inoculation of sterile blood into a blood culture medium (tryptic soy broth) with sodium polyanetholesulfonate and CO(2) were investigated. Cellular changes, pH, PCO(2), and PO(2) were monitored and evaluated. Erythrocytes became crenated and developed precipitated hemoglobin inclusions within 4 h. The lymphocytes appeared morphologically intact at 24 h, and by 48 h a few cells had undergone transformation. Many neutrophils were vacuolated at 24 h. Neutrophils capable of phagocytizing Staphylococcus aureus were observed after 18 h of incubation. Identifiable eosinophiles were present on day 6 of the study. A decrease in PO(2) in the unvented bottles from 44.4 to 8 mm of Hg occurred by 24 h. PO(2) remained low for 6 days, after which a slight increase occurred. An increase in PO(2) in the vented bottle from 51 to 58 mm of Hg occurred by 24 h of incubation. In both the vented and unvented bottles the PCO(2) increased. This increase was markedly more rapid in the unvented bottle. From a pH of 7.06 a decrease occurred for the first 24 h after inoculation, with the pH stabilizing at 6.8 in the vented bottles and at 6.6 in the unvented bottles. The biochemical changes that occurred in the vented culture bottles stabilized more rapidly than those of the unvented bottles. Changes caused by the addition of sterile blood to a blood culture medium resulted in conditions which departed considerably from accepted optima for the isolation of clinically important microorganisms. The phagocytosis of organisms that occurred may also have reduced the yield.     

Blood Transfusion,Blood Storage and Immunomodulation

Allogeneic blood transfusion is the most frequent allotransplantation procedure performed on a routine basis with no prior HLA-typing. Roughly 50% of the recipients of unprocessed red cells and platelets become alloimmunized. Evidence also exists for some degree of transfusion-induced immunosuppression. Prior transfusion has been shown to enhance kidney transplant survival and evidence of an increase in tumor recurrence and of infectious complications has also been presented. The presence of donor antigen-presenting cells appears to be a prerequisite for alloimmunization and they must be both viable and capable of presenting a costimulatory signal in order to induce IL-2 secretion and proliferation of responding CD4 T cells. APCs presenting antigen but no costimulatory signal can induce non-responsiveness in CD4 T cells, a possible mechanism of transfusion-induced immunosuppression. APCs in refrigerated blood continue to present antigen but progressively lose their ability to provide costiraulation. By day 14 costimulatory capacity is absent and transfusion of such blood should not alloimmunize but could induce some degree of immunosuppression. Further refrigerated storage in excess of 2 to 3 weeks leads to induction of apoptosis in contaminating leukocytes. We have found that alloantigens expressed on such cells do not appear to be recognized by responder T cells and transfusion of blood stored in excess of 3 weeks should neither alloimmunize nor immunosuppress.     

高血压病患者血脂、血糖与血压关系的研究

目的:探讨高血压病患者血脂、血糖与血压的相关性。方法:测定482例高血压病患者和100例健康人Cho-C、TG、LDL-C、HDL-C、apoA、apoB、血糖(BS)以及血压(SBP、DBP),并进行统计学分析。结果:高血压组Cho-C、TG、LDL-C、BS明显升高(P<0.05~0.01);Cho-C与BS呈明显正相关(P<0.05);TG与BS、SBP、DBP呈明显正相关(P<0.05~0.01);BS与SBP呈明显正相关(P<0.05)。结论:高血压病患者存在脂代谢及糖代谢异常。TG与血糖水平及血压均呈正相关。