Grover disease and bullous pemphigoid: a clinicopathological study of six cases

Grover disease (GD) is an idiopathic dermatosis that typically manifests as itchy papules over the trunk in middle‐aged men. Bullous pemphigoid (BP) is an autoimmune bullous disease that affects older people. Not only are the two diseases easily distinguishable on clinical grounds, they are also characterized by differences in histopathology, pathogenesis and response to treatment Thus, the co‐occurrence of these two conditions in the same patient is usually considered coincidental. In this report, we present a multicentre retrospective analysis of six patients who developed both GD and BP over a short period of time, and in all cases but one, GD preceded BP. We discuss the clinical and histopathological features of these patients, and the suggested mechanisms of the diseases. We conclude that GD might predispose to the development of BP.     

金石穿胶囊对致石豚鼠胆汁主要成分的影响

目的 :研究金石穿对致石豚鼠胆汁中几种主要化学成分的影响 ,以确定其防治胆石症的疗效。方法 :随机将 6 0只实验豚鼠分为正常组、模型对照组、胆石通组、金石穿组 ,用致石饲料诱发豚鼠胆囊结石模型 ,喂养一段时间后处死豚鼠 ,取胆汁 ,测定其胆汁中胆红素 (Bi L)、胆固醇 (Cho)、钙离子 (Ca2 )的含量。结果 :金石穿组胆汁中Cho、Bi L、Ca2 浓度均降低。结论 :金石穿能有效降低致石豚鼠成石率 ,具有明显的防治胆石症的作用     

Cytogenetic and histologic correlations in malignant lymphoma

Although a number of studies have indicated correlations between histologic subtypes of tumors and certain nonrandom chromosome changes, cytogenetic studies of lymphoma are in an early stage compared to those of leukemia. No comprehensive analysis of available data has so far been attempted in the literature either. Here we present an analysis of chromosome changes and their correlation with subtypes of lymphoma studied by conventional histology and cell surface markers, as observed in two sets of data: a group of 65 karyotypically abnormal tumors sequentially ascertained and studied by us during the period January 1, 1984 to April 30, 1985, and a larger data set derived by combining our data with those from two published series from the University of Minnesota that are comparable to our data. These combined data, which comprise the largest data set on the cytogenetics of lymphomas assembled so far, enabled a comprehensive analysis of correlation between chromosome change and tumor histology and the patterns of chromosome instability in these tumors. We found several significant associations, some previously described and others now recognized, between nonrandom chromosome gains, breaks, translocations, and deletions and histologic subtypes of tumors that characterize lymphomas. The data indicate that finding of chromosome breaks at certain sites (eg, 8q24, 14q32, 18q21) is of diagnostic value in dealing with cases of unusual lymphoma. Furthermore, nonrandom chromosome breakage exhibited three distinct patterns that reflected three levels of etiologically relevant genetic change.     

Successful in vitro graft-versus-tumor effect against an Ia-bearing tumor using cyclosporine-induced syngeneic graft-versus-host disease in the rat

Lethally irradiated LouM rats reconstituted with syngeneic bone marrow and then treated with cyclosporine (CsA) for 40 consecutive days following transplant developed a graft-v-host disease (GVHD)-like syndrome after CsA cessation. This model of GVHD was used to define and characterize a graft-v-tumor (GVT) effect against a syngeneic plasmacytoma CRL1662 cell line which expresses class II major histocompatibility (MHC) antigen (Ia). Nylon wool-nonadherent spleen cells from animals who developed syngeneic GVHD were capable of significant lysis against chromium-labeled tumor target cells in a four-hour chromium released cell mediated lympholysis assay; maximum lysis occurred five days following cessation of CsA when clinical signs first appeared. Cytolytic activity declined to baseline as GVHD symptoms resolved. Fractionation of splenocytes into lymphocyte subsets demonstrated that cytolytic lymphocytes (CTLs) of the OX8 phenotype (non-helper T) were capable of significant lysis against tumor target cells. Lysis of tumor cells was blocked by preincubation with monoclonal antibodies (MoAb) specific for the rat anti-class II MHC antigen but not with MoAb against class I. Incubation of tumor cells with gamma-interferon increased expression of tumor class II MHC antigens and significantly increased their susceptibility to lysis by nylon wool-nonadherent splenocytes from animals with syngeneic GVHD. These studies have demonstrated an in vitro GVT of syngeneic GVHD against an Ia-bearing tumor; the effector cell is a CTL of the OX8 phenotype specific for the class II MHC antigen.     

人芽囊原虫在不同培养基中生长状况的观察

目的筛选培养人芽囊原虫的最适培养基。方法将同一株人芽囊原虫阳性粪便标本以2×105细胞/管接种至RPMI1640、199和LES培养基中,加入20%小牛血清及青、链霉素,pH值为7.5,放置厌氧罐中于37℃恒温培养,每24h计数,每6d转种1次。观察人芽囊原虫在3种培养基中的存活时间、虫体密度和虫体形态。结果人芽囊原虫在RPMI1640培养基中存活时间最长、虫体密度最高,虫体以空泡型多见;在LES培养基中存活时间最短、虫体密度最低,但虫体形态清晰、规则;在199培养基中存活时间和虫体密度均介于前两者之间。结论RPMI1640培养基适宜人芽囊原虫的生长繁殖,为人芽囊原虫体外培养的首选培养基;LES培养基中虫体形态清晰、规则,可用于人芽囊原虫的形态学研究;199培养基也可用于人芽囊原虫的体外培养,但不作为首选。