壮医药线点灸对脾虚大鼠垂体生长抑素的影响

目的:探讨壮医药线点灸对实验性脾虚大鼠垂体生长抑素(Somatostatin)的影响。方法:用耗气破气加饥饱失常法建立100只大鼠实验性脾虚模型,用放射免疫分析法检测壮医药线点灸治疗前后大鼠垂体及血浆中SS的含量,并设立空线点灸对照、中药四君子汤治疗对照、模型自然恢复对照及正常健康对照。结果:脾虚大鼠脑垂体和血浆中的SS含量明显高于同期正常健康对照(P<0.01)。壮医药线点灸治疗后,脑垂体及血浆中的SS含量明显降低,治疗前后比较差异有显著性,P<0.05;治疗后与同期模型组及空线点灸治疗对照组比较差异也有显著性,P<0.05;与中药治疗组比较差异无显著性,P>0.05。结论:壮医药线点灸对实验性脾虚大鼠垂体SS有调整作用。     

乙型肝炎病毒表面抗原胶体金试纸快速检测法与固相放射免疫检测法的应用比较

为了比较用于检测乙型肝炎 (乙肝 )病毒表面抗原 (HBsAg)的胶体金试纸快速检测法和固相放射免疫检测法(SPRIA) ,2 0 0 2年大同市采用配对比较的方法检测了 0～ 7岁健康儿童的血清 30 9份。结果显示 :胶体金试纸快速检测法 ,阳性检出率为 0 97% ,RIA法的阳性检出率为 3 2 4 %。两种方法阳性检出率的差异有显著的统计学意义(χ2 =5 14 ,P <0 0 5 )。两种方法用于检测HBsAg一致性好 ,但胶体金试纸快速检测法灵敏度较低。采用SPRI A法检测的 30 9份健康儿童血清HBsAg阳性率为 3 2 4 % ,≤ 3岁儿童的血清HBsAg阳性率为 0 ,>3岁儿童的血清HBsAg阳性率为 4 93% ,两组差异有非常显著的统计学意义 (χ2 =6 2 5 ,P <0 0 1)。随着年龄的增加 ,HBsAg阳性率升高。     

Sol Particle Immunoassay (SPIA)

We describe the use of inorganic (metal) colloidal particles as a label for immunoassays. Dose-response curves for human placental lactogen (HPL) and human chorionic gonadotrophin (HCG) were obtained with sandwich immunoassays, using conjugates consisting of antibody-coated colloidal gold or silver particles. Several techniques were used to measure the amount of bound conjugate, viz. colorimetry and carbon rod atomic absorption spectrophotometry (CRAAS). At higher antigen concentrations the results of the assay could be read by the naked eye.

Using gold particles as label and CRAAS as detection method, we found a detection limit for a sandwich HPL sol particle immunoassay (SPIA) of 1,4 pmol/l, which was equal to that of an optimalized competitive radioimmunoassay. When using a colorimeter the detection limit for HPL of this SPIA was 5,4 pmol/l, which was superior to that of a corresponding sandwich enzyme-immunoassay (EIA). HPL and HCG were also simultaneously determined, using micro-titration plates, coated with a mixture of anti-HPL and anti-HCG, and a mixture of silver particle anti-HPL conjugate and gold particle anti-HCG conjugate. CRAAS was used to measure the bound amount of silver and gold conjugate. This simultaneous assay requires more work in order to obtain better sensitivities.     

Levels of Immunoreactive Angiotensin II in Microdissected Nuclei from Adult wky and Sh Rat Brain

Levels of immunoreactive angiotensin II (ANG II) were measured by radioimmunoassay in microdissected nuclei from the brain of the spontaneously hypertensive rat (SHR) and its normotensive control, the Wistar Kyoto rat (WKY). The nuclei assayed included the paraventricular nucleus of the hypothalamus (PVH), locus coeruleus (LC), nucleus of the solitary tract (NTS), dorsal motor nucleus of the vagus nerve (DMN of X) and the Al region of the medulla. Sections of cerebral and cerebellar cortex were used as controls. Levels of immunoreactive ANG II ranged from 0.24 nmoles/g protein to 0.93 nmoles/g protein, with SHR brain containing significantly higher levels than WKY brain in the PVH and NTS. higher levels of immunoreactive ANG I1 than WKY brain, the difference was not significant. the A1 region between the two species, and no detectable ANG I1 immunoreactivity was found in cerebral or cerebellar cortex. Since each of the nuclei studied has been implicated in the neural control of cardiovascular function, the increased levels of immunoreactive ANG I1 in the SH rat brain nuclei indicates a possible role for ANG I 1 in the pathophysiology of hypertension in the SHR model. Although LC and DMN of X in the SHR brain contained No significant difference was found in     

人血清羧基端甲状旁腺激素放射免疫测定的生理和临床意义

放射免疫测定232例正常人和121例各类疾病患者血iPTH浓度发现:正常人iPTH含量随年龄、性别不同而变化,特别指出造成41～50岁年龄组男女iPTH含量有显著性差异(P<0.05)的生理原因是女性更年期到来。测定iPTH对诊断原发性甲旁亢、尤其是定位诊断异位甲状旁腺腺瘤有独特临床价值,iPTH含量变化也是判断肾功能不全程度的一项客观指标,对骨质疏松发病原因的鉴别有一定参考价值。     

The establishment of an attachment research network in Latin America: Goals,accomplishments, and challenges

In the face of a pressing need for expanded attachment research programs and attachment informed interventions in Latin America, a research network was established: Red Iberoamericana de Apego: RIA (Iberian-American Attachment Network). The purpose of RIA is to promote human development and well being, informed by attachment theory, centering on research, and with implications for public policies, education, and intervention. We report the proceedings of the second meeting of RIA held in Panama City, Panama, in February 2010. As part of this meeting, RIA sponsored the first Latin-American attachment conference. Proceedings of the conference are described, as are future goals of this new organization.     

Parathyroid Hormone Radioimmunoassay: The Clinical Evaluation of Assays Using Commercially Available Reagents

This paper reports on the diagnostic usefulness of two commercial PTH assay kits and four “in-house” assays using commercially available reagents, studying the same samples from normal controls and different patient groups. The ability of such assays to discriminate proven primary hyperparathyroid (1° HPT) patients from normals varied significantly but without any apparent correlation with assay components. For all assays, performance declined markedly in 1° HPT patient groups with lower serum calcium levels. Patients with PTH secondary to chronic renal disease were well discriminated from normal by all assays. Although immunoassays are useful in many cases of 1° HPT, it is difficult to develop C-terminal or mid-region PTH assays that are uniformly diagnostically useful in the clinical situation where they are of greatest potential use i.e. in cases of mildly hypercalcaemic 1° HPT.     

Characteristics of Radioimmunoassays for the α- and β-Subunits of Human Luteinizing Hormone

Abstract

The binding characteristics and specificities of the National Hormone and Pituitary Program (NHPP) kits for the radioimmunoassay of the alpha- and beta-subunits of human luteinizing hormone (hLH-α and hLH-β) were studied, as well as the specificities of the anti-hLH and anti-human follicle stimulating hormone (anti-hFSH) antisera distributed by the same organization. The affinity constants of the anti-hLH-α and anti-hLH-β antisera were calculated at 157 ± 8.4 nM^?1 and 109 ± 7.4 nM^?1, respectively. Both antisera were highly specific with regard to the other subunit. However, in the homologous hLH-α RIA, native hLH cross-reacted at 21.9%, hFSH at 17.5% and hTSH at 7.9%. The alpha-subunit of the human chorionic gonadotropin, hCG-α, was equipotent with the hLH-α standard in this assay. In the homologous hLH-β RIA, hLH showed a cross-reactivity of 14.7% while the cross-reactivities of hCG-β, hFSH and hTSH were 3.5%, 1.2% and 0.6%, respectively. The anti-hFSH antiserum was highly specific, while the anti-hLH antiserum showed non parallel competition curves. With this knowledge of the specificity of each antiserum, corrections can be properly made for the assays of hLH, hLH-α and hLH-β while the hFSH RIA can be used without correction for the presence of the three other components.     

Problems with measuring peripheral oxytocin: Can the data on oxytocin and human behavior be trusted?

Research on the neurobiological and behavioral effects of oxytocin (OT), as well as on its possible therapeutic applications, has intensified in the past decade. Accurate determination of peripheral OT levels is essential to reach meaningful conclusions and to motivate, support and inform clinical interventions. Different, but concordant, methods for measuring plasma OT have been developed over the past four decades, but since 2004 several commercially available methods have been favored in research with humans. Evaluation of these methods reveals that they lack reliability when used on unextracted samples of human fluids, and that they tag molecules in addition to OT, yielding estimates that are wildly discrepant with an extensive body of earlier findings that were obtained using methods that are well validated, but more laborious. An accurate, specific, and readily available method for measuring OT that can be adopted as the standard in the field is urgently needed for advances in our understanding of OT's roles in cognition and behavior.     

化学发光免疫法检测血浆同型半胱氨酸

同型半胱氨酸（Hey）即2-氨基-4巯基丁酸，亦称高半胱氨酸，是一含硫氨基酸，是胱硫醚和蛋氨酸转硫化和甲基化代谢旁路形成的中间体。