电刺激小脑顶核治疗脑微循环障碍所致脑缺血缺氧40例

目的观察电刺激小脑顶核(FNS)在人血液中红细胞形态及数目发生改变时引起的脑微循环障碍、脑功能失调、脑缺血、缺氧等症状时的治疗作用及机制。方法选取40例具有脑缺血、缺氧症候群的患者,随机分为两组,分别予以FNS治疗和服用尼莫地平片,共15 d;分别于治疗前,治疗后检查血常规、单光子发射计算机断层显像(single photon emission computed tomography,SPECT)。结果治疗前,血常规中红细胞各参数都有不同程度增高,并伴有SPECT的定性分析显示均有不同程度低灌注区;治疗后,应用FNS组红细胞各项参数均有所下调,并伴SPECT ROI区域计数的改善及SPECT的灌注缺损显著改善,临床症状随之减轻或消失,而尼莫地平组上述各项指标改善不明显,临床症状亦改善不明显。结论FNS能够干预红细胞,使之具有良好的红细胞变形能力(erythrocyte deformability,ED),使脑微循环得到有效灌注,从而纠正脑缺血、缺氧。     

Abnormal rheological response of erythrocytes caused by nitroimidazoles and hyperthermia

The aim of the present study was to investigate the response of erythrocytes to hyperthermia in combined treatment with nitroimdazoles. The efficiency of nitroimidazoles and physical agents on the rheological response of erythrocytes was measured by the viscosimetric-diffractometric method in a continuous osmotic gradient with constant shear stress of 100 dyn/cm². We found that three newly synthesized dinitro-or nitroimidazole derivatives caused oxidative damage of erythrocytes in aerobic conditions. Nitroimidazole structure-dependent decrease of erythrocyte deformability was accompanied by oxidation of haemoglobin and depletion of reduced glutathione, lipid peroxidation and alteration of membrane structure indicated by a decrease of the ANS fluorescence intensity and increased production of MDA. Heat treatment per se (from 42 to 45°C) only slightly decreased the erythrocyte deformability, but markedly enhanced the structure-dependent effect of nitroimidazoles. Erythrocytes heated at 45°C with dinitroimidazole derivative III lost their deformability without haemolysis. Dithiotreitol used in combination with nitroimidazoles during a heating period to 43·5°C protected cell deformability entirely, indicating an important role for disulphide bond formation in membrane proteins submitted to oxidative stress and hyperthermia.     

Sysmex XE 2100血细胞分析仪红细胞报警的临床诊断价值

目的评价Sysmex XE 2100全自动血细胞分析仪红细胞报警的临床诊断价值。方法收集我院住院以及门诊患者500例(500份)静脉血标本,用Sysmex XE 2100全自动血细胞分析仪做血常规检测,对400例(份)出现报警信息的标本进行血涂片镜检,评价血细胞分析仪检测红细胞报警的诊断价值。结果血细胞分析仪红细胞报警的特异度为74%,灵敏度为100%,阳性预测值为91.25%,阴性预测值为100%,与金标准镜检的符合率为93%,一致性指标K=0.82,K>0.75。结论 Sysmex XE 2100全自动血细胞分析仪对异常红细胞报警系统的性能良好,特异性好,灵敏度高,符合临床应用要求。     

尿液红细胞位相检测对肾脏疾病诊断意义

探讨尿液红细胞位相检测,判断早期肾脏疾病的肾小球性与非肾小球性血尿来源诊断意义.采用相差显微镜检测尿液红细胞的变形率,并与健康人进行对比分析.结果表明,尿液红细胞变形率对判断肾小球性与非肾小球性血尿来源阳性人数检出率,与临床诊断符合率达95.51%;各组比较有统计学意义(P＜0.01).采用相差显微镜检测尿液红细胞的变...     

Acute effect of TSH on oxygenation state and volume of erythrocytes from subjects thyroidectomized for differentiated thyroid carcinoma

We previously reported the presence in the membrane erythrocyte of a TSH receptor (TSHR), a G-protein coupled receptor, which responds to TSH with increased cAMP level. Since there is evidence for a role of G protein receptors as oxygen sensor(s) implicated in cell volume regulation, we hypothesized that erythrocyte TSHR, by TSH stimulation, could modify the erythrocyte volume and the oxygenation state of erythrocytes. We determined the effect of TSH on the gas analysis in 35 thyroidectomized patients for stage I differentiated thyroid cancer enrolled for recombinant human thyroid-stimulating hormone (rhTSH) test during chronic treatment with synthetic l-thyroxine. Moreover, we explored the influence of TSH on the shape of erythrocytes. Venous blood-gas analysis before and after TSH were determined with a pH/blood gas electrolyte and 682 CO-Oxymeter. In a subgroup of subjects (n = 10), the isolated red blood cells (RBC) were analyzed by flow cytometry for morphological changes. After TSH stimulation, we found a significant decrease in PCO₂ (P < 0.001), an increase in pH (P < 0.01) and an increase of % O₂-Hb (P < 0.05) and pO₂ (P < 0.05). By flow cytometry, the erythrocytes after TSH showed a significant enrichment on the mean number in the selected region R1 corresponding to bigger volumes (P < 0.05, n = 10). Finally, by contrast phase microscopy, when the cell area was measured, a mean increased volume was observed in erythrocytes after TSH compared to the basal before TSH (P < 0.05). In conclusion, our results indicate that acute stimulation of TSH by rhTSH modifies the oxygenation state and volume of erythrocyte.     

汉、回及维吾尔三民族红细胞CR1基因点突变差异的研究

目的研究汉族、维吾尔族及回族三民族正常人群红细胞补体受体Ⅰ型(ECR1)基因点突变的差异及意义。方法采用PCR和HindⅢ酶切技术分析红细胞CR1分子基因点突变。结果三民族红细胞CR1基因突变率分别为:汉族32.5%,维吾尔族24.0%,回族23.5%,统计学比较虽无显著性差异(χ2=4.62,P>0.05)。三民族女性红细胞CR1基因突变率(32.5%)明显高于男性(23.7%),虽无显著统计学差异(χ2=3.71,P>0.05),但维吾尔族女性突变率(32.8%)显著高于男性(18.3%,(χ2=4.25,P<0.05);汉族男性的红细胞CR1基因多态性分布(31.5%)显著高于维吾尔族(18.3%)和回族(19.6%)男性(χ2=6.10,P<0.05);汉族和回族男女之间红细胞CR1基因多态性分布无显著差异。结论汉族男性红细胞CR1基因突变率显著高于维吾尔族和回族男性,维吾尔族女性突变率显著高于维吾尔族男性。此外,汉族人群红细胞CR1基因突变率有高于维吾尔族和回族的趋势,三民族女性红细胞CR1基因突变率有高于男性的趋势,这对免疫性疾病地域差异的研究具有重要意义。     

流式法检测红细胞膜抗体含量在新生儿ABO溶血病的诊断价值

目的用流式细胞仪检测新生儿高胆红素血症患儿红细胞膜的抗体含量并进行计数,以探讨红细胞膜抗体计数对新生儿ABO溶血病的早期诊断价值。方法收集患儿静脉血标本70例,其中51例为临床确诊的新生儿溶血病,19例为临床疑似病例,采用流式细胞仪计数患儿红细胞膜被同种血型抗体致敏后的抗体含量水平。结果51例临床确诊的新生儿ABO溶血病标本均可检测到红细胞膜被同种血型抗体致敏后的相关抗体,但红细胞膜抗体含量及致敏比例有明显差异;19例临床疑似病例中,9例检测到红细胞膜相关抗体,并与临床最后诊断相符,10例结果阴性,其中6例临床排除ABO溶血所致的高胆红素血症,另4例病因不明。结论流式细胞仪可以直接检测到患儿红细胞被同种血型抗体致敏后的抗体含量,特别是对红细胞膜上结合抗体数量少,卡式法检测阴性、临床又高度怀疑的溶血病患儿有重要的临床诊断价值。     

Hematological morbidity and management in neonates with hemolytic disease due to red cell alloimmunization

Treatment of severe anemia with intrauterine red cell transfusions in fetuses with red cell alloimmunization has led to a dramatic increase in perinatal survival. Due to this increased survival focus is nowadays shifting towards improving postnatal treatment options. Phototherapy, exchange transfusions and intravenous immunoglobulin are used to treat hyperbilirubinemia and prevent kernicterus. Postnatal treatment of anemia consists of top-up transfusions, supplements to support erythropoiesis such as folic acid and iron, and occasionally erythropoietin treatment. In addition to anemia, other hematological complications such as thrombocytopenia, coagulation disturbances, leucopenia and iron overload have been reported. This review focuses on the hematological morbidity in neonates with red cell alloimmunization and summarizes the current evidence on management options.     

双重滤过血浆置换对类风湿关节炎RF、C-RP、ESR影响的研究

目的 探讨双重滤过血浆置换对类风湿关节炎RF、C-RP、ESR的影响.方法 28例患者均给予双重滤过血浆置换治疗,每次间隔7 d,连续3次.同时,患者既往应用药物激素或非甾体抗炎药和(或)免疫抑制剂在双重滤过血浆置换治疗1次后,视病情逐渐减量.结果 RF、C-RP、ESR均明显下降.结论 双重滤过血浆置换可明显降低类风...     

Feruloylacetone as the model compound of half-curcumin: synthesis and antioxidant properties

In order to clarify the contribution of phenolic and enolic hydroxyl group to the antioxidant capacity of feruloylacetone, a model compound of half-curcumin, 6-(p-hydroxy-m-methoxyphenyl)-5-hexene-2,4-dione (FT), 6-(p-benzyloxy-m-methoxyphenyl)-5-hexene-2,4-dione (BMFT), 6-(m,p-dihydroxyphenyl)-5-hexene-2,4-dione (DDFT), 6-(p-hydroxy-m-methoxyphenyl)hexane-2,4-dione (DHFT), 6-(p-hydroxy-m-methoxyphenyl)-5-hexene-2,4-diol (THFT), and ethyl 2-(p-hydroxy-m-methoxybenzylidene)-3-oxobutanoate (EOFT) were synthesized. The radical-scavenging abilities of these compounds were tested by trapping 2,2′-azinobis(3-ethylbenzothiazoline-6-sulfonate) cationic radical (ABTS⁺), 2,2′-diphenyl-1-picrylhydrazyl (DPPH), and galvinoxyl radicals. The reductive capacities were screened by quenching singlet oxygen and by inhibiting the oxidation of linoleic acid. They were also employed to inhibit the oxidation of DNA mediated by hydroxyl radical and 2,2′-azobis(2-amidinopropane hydrochloride) (AAPH). In addition, they were applied to protect erythrocytes against AAPH- and hemin-induced hemolysis. The obtained results revealed that the antioxidant capacity of half-curcumin was derived from the phenolic-OH and the conjugated linkage between phenolic and enolic-OH. The enolic-OH itself cannot trap radicals.