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91.
To measure myelin basic protein (MBP)-like material in cerebrospinal fluid, we compared two radioimmunoassays, both using the same antiserum to MBP but one using peptide (45-89) as the radioligand and standard (peptide assay), and the other using purified MBP as the radioligand and standard (MBP assay), with respect to their diagnostic sensitivity. Cerebrospinal fluid specimens from 185 patients with definite multiple sclerosis (MS) (n = 27), possible MS (n = 63), probable MS (n = 24), and other neurological disease (n = 71) were analyzed using both assays. The diagnostic sensitivity of the peptide assay was significantly better than that of the MBP assay in those with definite MS (sensitivity 59% and 30%, respectively); there was no significant difference in specificity. The peptide assay also showed better correlation with disease activity than the MBP assay: 14 patients classified as having active MS showed significantly higher sensitivity (78.6% versus 38%, p less than 0.04) when compared to patients with inactive disease. The MBP assay showed no significant difference between these two groups. Besides the increase in sensitivity, the actual molar concentrations of immunoreactive MBP detected using this peptide assay were considerably higher than those found using the MBP assay. These results show that the use of MBP antisera capable of recognizing epitopes present in the carboxyl half of MBP peptide (45-89) results in more sensitive detection of immunoreactive MBP when used with MBP peptide (45-89) as radiolabeled ligand in the assay. 相似文献
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Influence of carbohydrates on the immunogenicity and immunocontraceptive potential of zona pellucida glycoproteins has been investigated in rabbits. Porcine zonae pellucidae, following deglycosylation with trifluoromethane-sulfonic acid, retained significant immunogenic potential, as shown by the ability to generate antibodies which cross-reacted with the heterologous antigen. Antibody response, however, was much stronger against the native zona glycoproteins, thereby suggesting that both carbohydrate and protein moieties contribute to the overall immunogenicity of the zona pellucida antigens. Contraceptive efficacy of active immunization with the deglycosylated zona antigens, when evaluated by mating experiments, demonstrated inhibition of fertility in all immunized rabbits. Normal ovarian functions were disrupted in these animals, as revealed by the reduction in ovarian weights and gross impairment of folliculogenesis. Flushing of the oviducts of the immunized animals yielded a markedly reduced number of ova ovulated in response to hCG administration, none of which were fertilizable. Results collectively suggest that active heteroimmunization with deglycosylated zona pellucida antigens is effective in reducing fertility in rabbits. 相似文献
94.
S ArunabhDutta Gupta S Bal A K Sarda M Vijayraghavan N K Shukla M M Kapur 《The Japanese journal of surgery》1988,18(4):455-459
A case of extramedullary plasmacytoma in the soft tissues of the posterior chest wall of an 80-year old man is reported herein. Immunofluorescence study showed that the tumor cells produced IgG lambda. An M-component was also detected in the patient's serum by paper electrophoresis. Two months following the open biopsy done to establish diagnosis, the tumor underwent spontaneous regression and the M-component in the serum also disappeared. This is the first case report of spontaneous regression of an extramedullary plasmacytoma and the probable reasons for this spontaneous regression are discussed herein. 相似文献
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M K Gupta 《Clinical biochemistry》1992,25(3):193-199
The study of autoimmune thyroid disorders (AITD) has greatly contributed to our knowledge of autoimmunity. Graves' disease and Hashimoto's thyroiditis represent two ends of the range of autoimmune responses seen in AITD. Autoantibodies reactive to cytoplasmic antigens are associated with cell damage, and thyrotropin (TSH)-receptor antibodies (TRAb) influence the function and growth of the gland and play a major role in pathogenesis. The heterogeneous nature of TRAb is well accepted. Besides their long-known thyroid stimulating activity, TRAb can act as blocking antibodies or growth-promoting antibodies and, thus, cause hypothyroidism (primary myxedema) or endemic and sporadic goiters, respectively. Advanced methodologies for detection of these antibodies with the TSH-receptor assay and thyroid cell bioassay allow various activities to be measured. Current data using these assays confirm the presence of heterogeneity of functional activities of TRAb(s) in vivo. The activity of predominating antibody may relate to clinical presentation. This indicates a need for paired determinations of both TSH-binding inhibitory immunoglobulin (TBII) and thyroid-stimulating immunoglobulin (TSI) for accurate clinical correlations. Cloning the TSH-receptor gene has clarified its structure and function. The future identification of its epitopes will further delineate the clinical role of these antibodies and may allow development of new diagnostic and therapeutic approaches. 相似文献
98.
Clark T. J. Neelakantan D. Gupta J. K 《世界核心医学期刊文摘》2006,2(9):36-37
目的:鉴定现行的治疗方法并评价其对子宫内膜增生妇女的治疗效果。研究设计:研究1998年10月至2000年9月期间所有在伯明翰妇女医院,经组织学诊断为子宫内膜增生的妇女。应用标准化资料提取表对每一位妇女进行回顾性病例研究,基线特征包括临床表现和治疗方案。应用治疗后子宫内膜组织的检查结果来评价治疗方法的组织学反应,用是否需要子宫切除术及其指征来评价临床反应。结果:在研究期间有351例妇女被诊断为子宫内膜增生,其中84%表现出异常子宫出血的症状且54%的患者已绝经。合并子宫内膜增生是最常见的诊断,占所有病例的60%。无细胞学非典型… 相似文献
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