心血管病患者血浆中血栓素、前列环素的水平及临床意义

目的探讨冠心病、急性心肌梗死等心血管病患者血浆中血栓素（TXB2）、前列腺素（6-Keto-PGFIα）的水平及临床意义。方法用放射免疫分析法测定血浆中TXB2和6-Keto-PGFIα。结果冠心病组88例血浆TXB2含量：（95.30±23.41）pg/ml明显高于正常对照组（74.03±13.40）pg/ml（P〈0.05）,而血浆6-Keto-PGFIα的含量：（47.51±18.30）pg/ml明显低于正常对照组（89.63±18.60）pg/ml（P〈0.05）,TXB2/6-K-eto-PGFIα的比值2.01明显高于正常对照组0.83。急性心肌梗死组37例血浆TXB2含量：（90.50±13.51）pg/ml明显高于正常对照组（74.03±13.40）pg/ml（P〈0.05）,而血浆6-keto-PGFIα的含量：（40.60±13.51）pg/ml明显低于正常对照组（89.63＋18.60）pg/ml（P〈0.05）。TXB2/6-Keto-PGFIα的比值2.22明显高于正常对照组0.83。结论测定血循环中TXB2和6-Keto-PGFIα的含量及它们的比值对于心血管系统疾病的诊断的治疗具有很重要的临床意义。     

Alterations in hypothalamic-pituitary-adrenal/thyroid (HPA/HPT) axes correlated with the clinical manifestations of depression

The alterations of hypothalamic-pituitary-adrenal (HPA) and hypothalamic-pituitary-thyroid (HPT) axes are important neuroendocrine abnormalities in depression. We aimed to identify some potential associations between these alterations and the clinical manifestations of depression in a sample of Chinese origin. 565 depressed patients of Chinese Han region were collected and seven kinds of hormones in HPA and HPT axes were detected. A 17-item Hamilton Depression Rating Scale (HAMD-17) and a 14-item Hamilton Anxiety Rating Scale (HAMA-14) were used to evaluate the baseline condition of each patient. 519 patients were enrolled into analysis. The patients with dysfunction of HPA axis had susceptibility to agitation symptoms (HAMD9 item) and cognitive disorders (HAMD2, 3 and 9 items), while those with normal function of HPA axis had susceptibility to shallow sleep (HAMD5 item). The patients with dysfunction of HPT axis had susceptibility to difficulty in falling asleep (HAMD4 item), weight loss (HAMD16 item) and gastrointestinal symptoms (HAMD12 item). Besides, the patients with dysfunctions of both HPA and HPT axes showed remarkable retardation symptoms (HAMD8 item). These findings might provide some evidences for the clinical subgrouping and management individualization of depressed patients according to the neuroendocrine alterations.     

Enkephalin immunoreactivity in synaptoid elements on glial cells in the rat neural lobe

Opioid peptides were localized in fibres of the rat neural lobe using various immunocytochemical methods at the light- and electron-microscopical level. Leu-enkephalin immunoreactivity was present in beaded fibres distributed throughout the neural lobe. These fibres surround the neurohypophyseal glial cells (pituicytes) and make synaptoid contacts upon their soma and processes. The reaction product was localized both in dense-core vesicles of about 100 nm in diameter and diffusely spread over the cytoplasm. No arguments in support of the co-existence of enkephalins and the neurohypophyseal hormones vasopressin and oxytocin in the same terminal were found.It is suggested that pituicytes might mediate the inhibitory effect of opiod peptides on vasopressin and oxytocin release from the neural lobe.     

Heterogeneity studies of hamster calcitonin following acute exposure to cigarette smoke: Evidence for monomeric secretion

Various acute stimuli, including cigarette smoke, induce hypercalcitonemia in man and hamsters. We have shown that this occurs also in thyroidectomized subjects. In the present study we have further explored this phenomenon of secretion from the lungs by studying, simultaneously, the HPLC characteristics of pulmonary tissue and serum in control hamsters and in animals immediately following short-term exposure to cigarette smoke. In addition, we have studied the immunoheterogeneity of lung calcitonin 24 hours following the acute exposure. Control lungs contained monomeric immunoreactive calcitonin (M-iCT), high molecular mass iCT (H-iCT), and CT fragments. Immediately following smoke exposure, there was an acute decrease of lung iCT by radioimmunoassay (RIA) which consisted primarily of a decrease in M-iCT by HPLC. Simultaneously, the iCT increase in the serum by RIA was shown by HPLC to involve M-iCT. Twenty-four hours after smoke inhalation, the lung iCT by RIA and M-iCT by HPLC had returned towards control levels. These findings document the molecular characteristics of lung iCT following acute cigarette smoke stimulation, and suggest that under certain circumstances M-iCT may be actively secreted by the lung. It remains to be determined whether this type of secretion reflects hemocrine or paracrine release and what the physiological role for such a secretion may be. © 1993 Wiley-Liss, Inc.     

Detection of both hepatitis B e antigen and antibody in a single assay using monoclonal reagents

Monoclonal antibodies raised against HBeAg were used to develop a HBeAg and anti-HBe detection assay. Monoclones containing anti-HBe were used both for the coating of the solid phase and for the fluid phase label in a sandwich type assay. The percentage binding of 125I-labelled anti-HBe to serum HBeAg was much greater than that seen in a similar assay using only polyclonal reagents. Therefore it was possible to add a small quantity of HBeAg for neutralising any anti-HBe present in a test serum without affecting HBeAg detection. This small amount of serum HBeAg was incorporated into each test sample thus allowing the determination of the e status of a patient using only one aliquot of test serum. This single test assay could be performed either as a radioimmunoassay or as an ELISA. The sensitivity of these assays was found to be greater than the conventional polyclonal assay particularly with regard to sera containing anti-HBe.     

Production and Characterization of Monoclonal Antibodies against Bovine Luteinizing Hormone

Five mouse hybridoma cell lines producing monoclonal antibody against bovine luteinizing hormone (LH) have been established and the respective antibodies characterized by radioimmunoassay, immunofluorescence and immunoelectrophoresis. All antibodies belong to the IgG class and bind to staphylococcus protein A. Intraspecies cross-reactivity studies revealed no reaction with bovine follicle stimulating hormone (FSH). However, all antibodies showed partial cross-reaction with bovine thyroid stimulating hormone (TSH) suggesting a close conformational similarity between bovine LH and TSH. Studies on interspecies cross-reactivity (rat and human) showed that three of these five antibodies strongly react with rat LH but not at all with either rat FSH or rat TSH thus representing monospecific reagents for investigations concerning LH in this species. One of these three antibodies also strongly binds to human LH and to the same extent to human chorionic gonadotropin (CG) but not to human FSH or TSH. It was concluded that at least three different epitopes on the bovine LH molecule are recognized and that they are located on the β-chain of the hormone.     

122例摄碘率低下患者甲状腺功能评价

通过对122例摄碘率低下患者的血清FT3、FT4、TT3、TT4浓度结果的分析表明,在他们当中有一定比率的患者这些激素的水平呈不同程度的升高,且TT4升高幅度较明显,FT3、FT4和TT3多集中在正常上界附近,形成TT4与TT3血清结果呈分离现象,而FT3与FT4较一致.提示在评价患者甲状腺功能状态时,对甲状腺激素水平升高的患者,一定要做好鉴别诊断.     

A simplified procedure for measuring the class of anti-bacterial antibodies by mixed reverse passive antiglobulin haemagglutination (MRPAH).

A modified procedure is described for performing the MRPAH (mixed reverse passive antiglobulin haemagglutination) reaction as a simple micro-method to measure the classes of bacterial antibodies. This 'bacterial dilution procedure' gave results closely correlated with those obtained by the 'serum (sample) dilution procedure' previously reported and with great economy of materials, labour and time. The method was used to investigate human serum antibodies to Br. abortus and S. enteritidis and serum and secretory antibodies to Strep. mutans. The good reproducibility of the MRPAH reaction was demonstrated by re-examining brucellosis sera tested one year previously. MRPAH was sufficiently sensitive to demonstrate the small amounts of IgG and IgM antibodies to Strep. mutans in human colostrum and early milk. A rise of antibody levels in the different immunoglobulin classes G, A and M was readily demonstrated in sera from individuals with salmonellosis.