Progression and regression of cervical lesions: Review of smears from women followed without initial biopsy or treatment

Cervical smears were reviewed from patients in whom a cytological abnormality was followed, after an interval without interference, either by regression to `negative' or else by progression to invasive carcinoma. Twenty-eight cases were from a previously analysed series with positive smears and an interval of at least two years before investigation, resulting from refusal or failure to trace. Slides were also reviewed from 25 cases in which `positive' smears had regressed to negative without escaping from surveillance, and from 10 patients subsequently developing invasive carcinoma whose previous slides, taken several years earlier, showed abnormalities on review. None of these 63 patients had any biopsy or other surgical procedure to the cervix between the initial smear and the outcome.

Slides showing `superficial cell dyskaryosis' and/or well-differentiated `parabasal cell dyskaryosis' were found only among the groups with subsequent regression. Those showing dissociated poorly differentiated dyskaryotic parabasal cells regressed to negative in two cases and progressed to invasion in nine. This suggests that many examples of spontaneous regression correspond to mild dysplasias which are not precancerous, and overdiagnosis must often have resulted in unnecessary surgical procedures in the past.

`Regressing' and `progressing' groups both included cases in which the spatula had removed coherent pieces of undifferentiated epithelium. These are difficult to interpret cytologically. In nine of them (including four which regressed) the cytological picture was that of carcinoma in situ. The remainder (14 cases) were probably examples of reserve cell hyperplasia, and it is noteworthy that, of the 21 cases subsequently progressing to invasive carcinoma, five were preceded by appearances of this type. It is concluded that cell aggregates suggesting an unusual degree of reserve cell hyperplasia are a danger signal and require careful surveillance.

     

App17肽防治去卵巢大鼠海马神经细胞的凋亡

目的:观察去卵巢大鼠几种神经元凋亡相关蛋白的表达,并用TUNEL试剂盒检测,研究缺乏雌激素是否引起神经元凋亡;评估App17肽是否能改善去卵巢大鼠的神经细胞凋亡,初步探讨App17肽的神经保护作用机制。方法:雌性Wistar大鼠随机分3组:假手术组(shamcontrol组),卵巢去势对照组(OVX组),App17肽实验组(17P+OVX组)。Sham组做假手术,OVX组和17P+OVX组做双侧卵巢切除术。17P+OVX组从卵巢去势第7周开始用App17肽治疗6周,用免疫组化和Westernblot方法观察AIF、Bax、Bcl-2的表达,用TUNEL法检测凋亡情况。结果:免疫组织化学和Westernblot结果表明App17肽实验组AIF、Bax表达明显少于去卵巢组;Bcl-2在App17肽实验组的表达明显高于去卵巢组。TUNEL结果表明App17肽实验组凋亡细胞明显少于去卵巢组。结论:雌激素缺乏引起去卵巢大鼠海马和皮层神经细胞凋亡相关蛋白改变和出现凋亡细胞,App17肽具有明显的防治作用。     

pEGFP-C3-B7.2-MAGE-1融合蛋白诱导特应性抗肿瘤免疫应答的研究

目的:构建重组表达载体pEGFP-C3-B7.2-MAGE-1,研究人B7.2/MAGE-1基因修饰的食管癌细胞作为瘤苗的抗肿瘤作用.方法:通过RT-PCR扩增B7.2和MAGE-1的cDNA,以pEGFP-C3为载体,构建pEGFP-C3-B7.2-MAGE-1重组载体,通过脂质体转染技术转染人食管癌细胞株EC9706,外周血来源的树突状细胞(DC)负载肿瘤抗原后,与自体T淋巴细胞共培养3天,获得细胞毒性T淋巴细胞(CTL),用四甲基偶氮唑蓝(MTT)法检测CTL对转染和未转染pEGFP-C3-B7.2-MAGE-1的食管癌细胞EC9706的杀伤活性.结果:CTL对转染pEGFP-C3-B7.2-MAGE-1的肿瘤细胞的杀伤活性大于转染pEGFP-C3和未转染细胞的杀伤活性(P＜0.05).结论:成功构建了真核共表达载体pEGFP-C3-B7.2-MAGE-1,人B7.2/MAGE-1基因修饰的EC9706肿瘤细胞瘤苗,可诱导出明显的抗EC9706细胞的免疫效应.     

检测抗聚丝蛋白抗体在类风湿关节炎诊断中的意义

目的探讨抗聚丝蛋白抗体(AFA)对类风湿关节炎(RA)诊断的价值,并比较与RA的其他早期诊断指标的相关性。方法从人表皮细胞中提取并部分纯化聚丝蛋白(filaggrin)抗原,用于免疫印迹检测(Western blot)103例RA血清标本和140例对照血清,包括系统性红斑狼疮(SLE)、干燥综合征(SS)、骨性关节炎(OA)95份及正常人45份。APF和AKA用间接免疫荧光法检测。结果103例RA病人的AFA阳性率、特异性分别为35.9%,93.7%,显著高于疾病对照组和正常人(P<0.001)。在AFA阳性的37例中,AKA也阳性的为26例,重叠率为70.3%;APF亦阳性的为31例,重叠率为83.8%,AFA与AKA、APF之间存在相关性。结论AFA对RA具有很高的特异性。AFA的检测可用于RA的临床诊断。AFA与APF及AKA有相关性,但不能完全取代它们的检测。     

HIS网络在门诊挂号、收费管理中的应用

随着医院现代化的高速发展,医院信息系统(HIS)显得越来越来至关重要。对其要求越来越趋于完善性、全面性、灵活性、快捷性。这样就要求有一套完整的HIS来满足现代化医院管理的需要,实现现代化医院"以人为本"的管理理念,"一切以病人为中心",用现代化的管理理念结合工作需求,构建工作中的"和蔼"关系。     

郑氏植物蛋白对乳腺癌及其癌前病变患者PBL的刺激作用及其意义

目的 :研究郑氏植物蛋白 (Zheng’splant protein ,ZPP)对淋巴细胞的刺激作用及其在乳腺癌早期诊断与治疗中的应用价值。方法 :采用3 H TdR掺入法测定人外周血淋巴细胞(PBL) )的增殖反应。用流式细胞仪测定ZPP对T淋巴细胞CD3+ 、CD4 + 和CD8+ 抗原表达的调节作用。结果 :ZPP对乳腺癌及其前期病变患者PBL有较强的刺激作用 (SI分别为3.0 0± 1.4 5和 2 .5 3± 0 .80 ) ,明显高于对正常对照组和乳管上皮轻度增生患者PBL的刺激指数 (SI分别为 1.0 6± 0 .17和1.18± 0 .19) (P <0 .0 1)。而PHA对各组PBL的增殖反应均有不同程度的刺激作用 ,但各组间无明显差异 (P >0 .0 5 ) .经ZPP刺激后的PBL中CD3+ 、CD4 + 和CD8+ 细胞均发生增殖反应 ,其中CD4 + 和CD8+ 者更为明显。结论 :ZPP可选择性刺激乳腺癌及其前期病变患者的PBL中T细胞发生增殖反应 ,此作用有可能用于乳腺癌的早期诊断与治疗中     

CD40 expression by gingival fibroblasts: correlation of phenotype with function

CD40, a member of the tumor necrosis factor-alpha receptor family, is constitutively expressed by cells of hematopoietic and non- hematopoietic origin, including fibroblasts. Signaling through this receptor molecule regulates inflammatory cytokine secretion by many cell types. Based on the recently described cytokine secretory heterogeneity of fibroblast cell subsets, we hypothesized that secretion of inflammatory cytokines by gingival fibroblast cultures may be dictated by the existence of differential proportions of cytokine- secreting subpopulations which express high levels of CD40. After examining a large number of gingival fibroblast (GF) cultures we find that the frequency of IL-6- and IL-8-secreting cells mirrors the frequency of cells expressing high levels of CD40 in these cultures. In addition, we demonstrate a direct functional relationship between CD40 expression and IL-6 or IL-8 secretion by showing that ligation of this molecule on GF, and CD40+ fibroblast subsets in particular, up- regulates secretion of these cytokines in vitro.      

外周血MSCs的分离培养及对G-CSF的动员反应

目的建市多种种属外用血间充质干细胞（MSCs）的分离培养方法，探讨其对粒细胞集落刺激因子（G—CSF）的动员反应。方法用percoll（1．131g/mL）分离多种种属外周血单个核细胞，进行贴壁培养MSCs。以G-CSF作为动员剂，培养骨髓和外周血来源的MSCs，计数动员前后的成纤维细胞集落形成单位（CFU-F）。结果对多种种属进行外周血MSCs分离培养，成功率不同。在本实验条件下．可以稳定的直接分离培养出大鼠外周血的MSCs。G—CSF动员后，骨髓来源MSCs的CFU-F数昔显著高于对照组（P〈0．01）；外周血来源MSCs的CFU-F数量也显著高于对照组（P〈0．01），接近4倍。结论不同种属外周血MSCs分离培养难易不同，其直接原因是生理条什下外周血中存在的MSCs量少导致的。G—CSF可以有效地动员大鼠骨髓和外周血MSCs。