氨溴特罗口服液治疗支气管炎患儿的效果

目的：观察氨溴特罗口服液治疗支气管炎患儿的效果。方法选取承德市中医院2013年7月~2014年7月收治的支气管炎患儿100例,将其随机分为A、B两组。两组患儿均在常规治疗基础上分别给予氨溴特罗口服液及盐酸氨溴索糖浆进行治疗。比较两组患儿不同药物治疗后症状控制情况及治疗总有效率等指标。结果 A组患儿咳嗽、咳痰、喘息、肺部啰音、憋闷缓解时间及住院时间分别为(7.4±1.2)、(6.1±1.1)、(6.0±1.2)、(4.7±1.5)、(3.7±1.1)、(9.1±1.4)d,均显著短于B组[(10.3±2.1)、(8.4±1.2)、(7.5±1.4)、(5.2±1.3)、(4.3±1.4)、(13.7±1.5)d],差异有统计学意义(P约0.05)。A组患儿治疗后显效29例(58.0%),有效21例(42.0%),总有效率(100.0%)显著优于B组患儿[显效17例(34.0%),有效20例(40.0%),总有效率(74.0%)],两组总有效率比较,差异有统计学意义(P约0.05)。治疗后A组患儿咳嗽症状、咳痰量、痰液黏稠程度评分均较治疗前及B组患儿明显改善,差异有统计学意义(P约0.05)。结论临床应用氨溴特罗口服液可在短时间内缓解患儿咳嗽、发热等不适症状并缓解支气管痉挛。服药后起效速度快,且药效发挥时间长,有助于痰液排出并有效抑制炎性物质释放。服药后患儿不良反应较少,治疗安全性高,对加快疾病治疗速度、改善患儿预后情况并提高其生活质量具有重要意义。     

Polarization fluorescence, spin label and ultracentrifugal studies of specific interaction of low molecular weight proteins with the Fc fragment of human immunoglobulin G

Low mol. wt (about 2000) proteins which were found in normal human serum formed complexes with the Fc fragment of IgG. The interaction constant was not less than 10⁶ 1/mole. These complexes dissociated on dilution of the protein solution to below 2 μM or decreasing the pH below 6. The binding site of these proteins was located in the C_H2 domains in close proximity to the carbohydrate moieties. The dissociation of IgG complexes with these proteins was accompanied by a conformational change in the Fc fragment.     

Fluorescence polarization and spin-label study of human myeloma immunoglobulins A and M. Presence of segmental flexibility

A comparative study of segmental flexibility of two human myeloma immunoglobulins, an IgA and an IgM, was carried out by three independent techniques: steady state and time resolved fluorescence depolarization and spin-label. The values of rotational correlation times obtained by these methods indicate that the segmental flexibility observed in these IgA and IgM molecules is comparable to that seen in the IgG molecule.     

Human chorionic gonadotrophin and steroid concentrations in follicular fluid: the relationship to oocyte maturity and fertilization rates in stimulated and natural in-vitro fertilization cycles

The study investigates the relationship of follicular fluidsteroids and human chorionic gonadotrophin to oocyte maturityand fertilization rates in stimulated and natural cycles. Oestradiol,progesterone, testosterone and human chorionic gonadotrophinwere quantified in 129 samples of follicular fluid and the progesterone:oestradiol ratio calculated. Both stimulated cycles (short andlong luteinizing hormone-releasing hormone/human menopausalgonadotrophin regimens) and natural cycles were compared. Atotal of 60 women were studied, 20 in each group. In the naturalcycles, testosterone was significantly lower in follicles withintermediate oocytes (P = 0.015). Both oestradiol and testosteronewere significantly lower in stimulated cycles compared to naturalcycles (P = 0.032 and P = 0.034 respectively). In the ovarianstimulation cycles, the progesterone: oestradiol ratio was significantlyhigher when oocytes fertilized (P = 0.052). Moreover, in thestimulated cycles, oestradiol and human chorionic gonadotrophinwere significantly lower in the short protocol compared to thelong protocol. The data demonstrate that the hormonal milieuof the follicle is altered in downregulated stimulated cyclesto varying degrees, depending partially on the type of protocolused. Furthermore, the progesterone: oestradiol ratio, ratherthan individual hormone concentrations, may be a useful predictorof the fertilizing capacity of the oocytes.     

脑电图在大脑半球切除术前后表现及临床意义

目的:探讨半球综合征(Hemispheric syndromes,HS)患者病变半球切除术前后发作间期与发作期的脑电图(EEG)表现特点及其临床意义。方法:总结自2001年4月至2004年4月行大脑半球切除手术的4例患者的临床资料并结合脑磁共振成像(MRI),对其发作间期、发作期以及病损大脑半球切除术半年后复查EEG结果进行分析总结。结果:4例患者MRI均显示为一侧半球广泛病变,对侧正常。EEG均表现为两侧不对称,患侧波幅明显减低。其中3例EEG表现出背景抑制。发作间期癫 癎异常波表现:1例癎样放电出现的侧别与影像学检查结果相反,2例患者出现了双侧同步癎样放电,1 例无明显异常波。发作期EEG表现:1例患者癎样放电起源与病灶侧别相符,其余3例出现在病灶的对侧。所有患者均接受了病灶侧大脑半球切除术,术后随访最短1例为12个月,4例均没有癫癎发作。手术半年后复查EEG,2例患者对侧发作间期癎样放电未消失,2例对侧EEG正常。结论:EEG对HS患者手术前定位诊断及预后判断都有一定的价值。分析HS头皮EEG时,要考虑到两侧大脑结构的绝对不对称性;当出现双侧癫癎异常放电时,不排除手术可以获得良好预后的可能性,可考虑对患侧半球行切除术治疗。EEG发作期单侧起源,在HS患者癫癎灶定位方面,与MRI结果相比,价值有限。HS患者,如明确患侧已不存在重要功能,应尽早手术治疗。     

Extraadrenal pheochromocytoma: detection during pregnancy using MR imaging

This case report demonstrates the usefulness of magnetic resonance (MR) imaging to demonstrate an abdominal mass during pregnancy. A pregnant woman presented in midgestation with symptoms and chemical evidence of a pheochromocytoma. The use of MR imaging permitted early localization of a retrouterine tumor when it would have been undesirable for the woman to undergo computed tomography because of radiation exposure. Evaluation of the MR images formed the basis of the therapeutic strategy used by the patient's physicians.     

Correlation between fibrinogen binding to human platelets and platelet aggregability

Fibrinogen is essential for aggregating platelets with adenosine diphosphate (ADP) and was recently shown to bind to platelets stimulated with ADP. The present work confirms the specific and saturable nature of the platelet-fibrinogen interaction. Binding of 125iodine-labeled fibrinogen to human gel-filtered platelts was maximal at 1 min, and the receptors were saturated when the fibrinogen concentration in the suspending medium approached 0.8 mg/ml. Assuming that one fibrinogen molecule interacts with a single receptor, experiments with 9 normal donors revealed the presence of 12,896 +/- 2456 receptors per platelet. Much of the bound material dissociated from platelets after incubation with apyrase or EDTA. Binding was markedly inhibited at pH 6.5, in the presence of EDTA, and with platelets from 3 thrombasthenic patients but not with those from a patient with the Bernard-Soulier syndrome. Fibrinogen binding was also virtually absent with platelets that had been incubated with EDTA for 8 min at 37 degrees C and pH 7.8. These platelets could not aggregate when mixed with ADP and adequate CaCl2 and fibrinogen, although they could still change their shape. Thus, ADP-induced binding of fibrinogen correlates with platelet aggregability.     

人sTRAIL基因的克隆、表达纯化及对人A549细胞的抗肿瘤活性作用

目的人TRAIL基因胞外区片段(114-281氨基酸残基,sTRAIL)的克隆、表达、纯化及对人肺腺癌A549细胞的抗肿瘤活性研究。方法采用PCR技术从人胎盘和肺cD-NA文库中扩增出全长人TRAIL基因,克隆到pUC19质粒载体上进行测序。然后再采用PCR技术,以全长人TRAIL基因为模板,扩增出sTRAIL基因片段并定向克隆到pET-11 a表达载体中,转化大肠杆菌BL21进行表达。表达后的产物经变性、复性和分离纯化,纯化后的sTRAIL用结晶紫染色法和流式细胞仪法测定其对人肺癌细胞A549的细胞毒性作用。结果从人胎盘和肺cDNA文库中都能扩增出全长人TRAIL基因,经测序表明与已发表的人TRAIL基因序列一致。扩增出的人sTRAIL基因克隆到表达质粒载体pET-11a,经IPTG诱导表达,表达量占细菌全菌蛋白的50%,纯化后的sTRAIL纯度大于98%,结晶紫法测定对人A549肺癌细胞的细胞毒性作用的IC50为(24±5.2)μg.L-1,流式细胞仪法测定对人A549肺癌细胞的细胞毒性具有明显的效应-时间依赖关系。结论本实验成功地克隆了人sTRAIL基因并实现其高表达,摸索出包涵体sTRAIL的变性、复性及其纯化方法,纯化后的sTRAIL蛋白对人A549肺癌细胞具有明显的细胞毒性作用,为进一步研究其功能与临床应用奠定了基础。