小儿脓毒症CD62p、CD63及CD64分子变化及临床意义探讨

目的探讨脓毒症患儿血小板仅颗粒膜糖蛋白（CD62p）、溶酶体膜蛋白（CD63）及中性粒细胞表面膜糖蛋白（CD64）的变化及意义。方法2010年3月至2013年3月哈尔滨市儿童医院感染内科收治的脓毒症患儿56例,其中严重脓毒症16例,一般脓毒症40例,另设健康对照组34例。应用流式细胞术检测儿童外周血的血小板表面活性标记糖蛋白CD62p、CD63及中性粒细胞CD64表达,并进行比较。结果严重脓毒症组患儿外周血的CD62p、CD63及CD64水平明显高于一般脓毒症组,差异有统计学意义（P〈0．01）;一般脓毒症组患儿CD62p、CD63及CD64水平明显高于健康对照组,差异有统计学意义（P〈0．01）。相关性分析显示,脓毒症患儿的CD62p、CD63与CD64水平呈正相关（r=0．817、0．796,P均〈0．001）,CD62p、CD63、CD64水平与小儿危重病例评分呈正相关（CD62p：r=0．883,P〈0．001;CD63：r=0．862,P〈0．001;CD64：r=0．805,P〈0．001）。结论CD62p、CD63、CD64与感染和炎症严重程度密切相关,可作为评价疾病严重程度及预后的指标。     

子宫内膜异位症患者子宫内膜HIF-1α、CD34、CD54的表达及相互关系

目的观察缺氧诱导因子1α(HIF-1α)、CD34、CD54与子宫内膜异位症(EMS)发生的关系,以期探讨EMS的发病机制。方法选取26例EMS手术患者,所有病例均经腹腔镜或开腹手术确诊,经病理证实为腹膜型EMS 8例,卵巢子宫内膜异位囊肿9例,子宫腺肌症9例,同期选取子宫肌瘤手术患者6例为对照组,应用免疫组织化学法(SP)测定2组子宫内膜组织中HIF-1α、CD34、CD54的表达。结果 HIF-1α、CD34、CD54在腹膜型EMS组、卵巢子宫内膜异位囊肿组、子宫腺肌症组的表达均高于对照组,差异有统计学意义(P0.05)。HIF-1α与CD34、CD54的表达呈正相关。结论 HIF-1α可能在EMS异位病灶形成中起重要作用,推测内异症的发生与局部病灶缺氧有关。且HIF-1α与CD34的表达呈正相关,提示HIF-1α可以促进内异症组织血管生成;HIF-1α与CD54的表达呈正相关,推测HIF-1α可加强异位内膜细胞的黏附作用,从而有利于形成异位灶。     

Langerin+ versus CD1a+ Langerhans cells in human gingival tissue: a comparative and quantitative immunohistochemical study

Langerhans cells (LC) are dendritic cells of the immune system able to capture intraepithelial pathogens and migrate to regional lymph nodes to present them to naive T cells. Up to now immunohistological studies on human gingival LC have been carried out using antibodies against HLA-DR or CD1a molecules. A new marker of LC called Langerin (CD207) and described, among other subcellular localisations, in the Birbeck granules is now available in immunohistochemistry. The purpose of this in situ study was to quantify and to compare Langerin+ versus CD1a+ LC number in order to show differences in the expression of these molecules, if any, and to determine which marker is the most specific. The present study was conducted using nine frozen healthy gingival samples. Double immunofluorescence procedures were performed with an anti-Langerin antibody revealed by FITC and with an anti-CD1a-PE antibody. Mounted slides were analysed by fluorescence microscopy and quantifications were performed on projected slides associated with a grid of 0.015 mm(2). Our results have shown that 1/ the number of CD1a+ LC was significantly increased (P=0.01) when compared with Langerin+ LC 2/ 92% of Langerin+ LC co-expressed CD1a 3/ only 82% of CD1a+ cells co-expressed Langerin 4/ a positive correlation was noted between CD1a+ and Langerin+ LC numbers. The present study has revealed the heterogeneity in the phenotype of gingival LC population and shown that Langerin seems the most specific marker for the study of LC.     

脂多糖信号受体CD14和 TLR4在人炎症根尖周组织中的表达

目的 研究慢性根尖周炎患者根尖周组织中脂多糖(LPS)信号受体CD14和TLR4的表达和分布,探讨CD14和TLR4在炎性根尖周组织中可能的作用.方法 收集需做根尖外科手术的12例慢性根尖周炎患者和10例外科手术拔出的无牙髓炎和根尖周病变的阻生齿的根尖周组织,术中取炎症和正常根尖周组织后常规切片,采用免疫组织化学方法检测CD14和TLR4的表达和分布.结果 CD14和TLR4在炎症根尖周组织中呈强阳性表达,主要分布于单核细胞、巨噬细胞等炎症细胞;而在正常根尖周组织中未见明显CD14和TLR4阳性细胞.结论 炎症根尖周组织中CD14和TLR4的阳性表达,提示LPS可能通过CD14和 TLR4信号受体在根尖周炎症组织中发挥作用.     

Association of CD14, IL1B, IL6, IL10 and TNFA functional gene polymorphisms with symptomatic dental abscesses

AIM: To investigate in individuals with symptomatic dental abscesses the occurrence of functional polymorphisms within five genes involved with the immune response. The functional gene polymorphisms analysed were CD14 (-260 C/T), IL1B (+3954 C/T), IL6 (-174 G/C,), IL10 (-1082 G/A) and TNFA (-308 G/A). METHODOLOGY: Genomic DNA obtained from oral swabs from individuals with symptomatic dental abscesses and asymptomatic inflammatory periapical lesions, without previous exacerbation, was submitted to restriction fragment length polymorphism (RFLP) analyses to determine each individual genotype. The chi-square and principal components analysis tests were used for statistical analysis. RESULTS: A significant association was observed between the occurrence of the GG genotype or the G allele expression of the polymorphic locus-174 (G/C) of the IL6 gene, and the presence of the symptomatic dental abscesses in women and in individuals < or =35 years old. The principal components analysis suggested predominance of the symptomatic dental abscesses in individuals displaying: high-producer IL6 genotype; intermediate and high-producer IL1B genotypes and low-producer TNFA genotype. CONCLUSIONS: The present study suggests that genetic factors are associated with susceptibility to develop symptomatic dental abscesses.     

Unaltered strong immunohistochemical expression of CD44-v6 and -v5 isoforms during development and progression of oral squamous cell carcinomas

The present study was designed to immunolocalize CD44-v6 and -v5 isoforms in normal, dysplastic and malignant oral mucosa as well as in primary and meta-static oral squamous cell carcinomas. Routinely formalin-fixed and paraffin-embedded tissues of 100 oral carcinoma patients were immunohistochemically investigated following wet autoclave antigen retrieval. Both CD44-v6 and -v5 epitopes were uniformly strongly expressed on the cell surface of basal and intermedial epithelial cells of normal and dysplastic mucosa and in all primary and melastatic squamous cell carcinomas with the exception of end-differentiated keratinizing cells. Our results strongly suggest that CD44-v6 and-v5 isoform expression is not altered during development and progression of oral carcinomas. Thus, they seem to be irrelevant factors in the prediction of prognosis in this type of cancer.     

Immunochemical detection of CD14 on human gingival fibroblasts in vitro

The activation of monocytes and macrophages induced by lipopolysaccharide has been shown to contribute to the binding of lipopolysaccharide and lipopolysaccharide-binding protein complex to the cell surface CD14 molecule. To clarify the mechanism of the lipopolysaccharide-induced modulation of the function of gingival fibroblasts, we investigated the effect of anti-CD14 on interleukin 6 (IL-6) production on human gingival fibroblasts in vitro. Immunochemical staining revealed weak positivity for CD14 on fibroblasts from healthy gingiva, while strong positivity for CD14 was found on fibroblasts from inflamed gingiva. Western blot profiles of the fibroblasts and monocytes showed a CD14-positive reaction at 55 kDa. Fluorescein isothiocyanate-conjugated Escherichia coli lipopolysaccharide bound to fibroblasts more strongly in the presence of 10% fetal bovine serum than without serum. This binding, as well as IL-6 production, was blocked by anti-CD14 monoclonal antibody. The results showed that CD14 was present on human gingival fibroblasts, which suggests that lipopolysaccharide modulation of gingival fibroblast function depends on CD14.     

CD44v6与COX-2在腮腺多形性腺瘤及癌在多形性腺瘤中的表达及临床意义

目的 探讨CD44v6与环氧合酶2（cyclooxygenase-2,COX-2）的表达与腮腺多形性腺瘤复发和恶化的相关性。方法 采用免疫组织化学法检测19例正常腮腺组织、25例初发多形性腺瘤、15例第一次复发多形性腺瘤、15例第二次复发多形性腺瘤和13例癌在多形性腺瘤组织中CD44v6与COX-2的表达,采用SPSS 15.0软件包分析CD44v6与COX-2与腮腺多形性腺瘤复发和恶化的相关性。结果 正常腮腺组织、初发多形性腺瘤、第一次复发多形性腺瘤、第二次复发多形性腺瘤与癌在多形性腺瘤中CD44v6阳性表达率分别为5.26%、44.00%、60.00%、93.37%和100.00%,COX-2阳性表达率分别为10.53%、40.00%、63.33%、93.37%和100.00%,各组CD44v6和COX-2阳性表达强度比较,差异有统计学意义（P<0.05）。正常腮腺组织中CD44v6和COX-2阳性表达率和表达强度显著低于其他各组（P<0.05）,初发多形性腺瘤与第一次复发多形性腺瘤组织中CD44v6阳性表达率和表达强度比较均无统计学差异（P>0.05）,2组COX-2表达强度比较无统计学差异（P>0.05）,但COX-2阳性表达率差异显著（P<0.05）;第二次复发多形性腺瘤组织中,CD44v6阳性表达率和表达强度以及COX-2表达强度显著高于第一次复发多形性腺瘤（P<0.05）,但2组COX表达阳性率无显著差异（P>0.05）;第二次复发多形性腺瘤组织与癌在多形性腺瘤组织中,CD44v6和COX-2阳性表达率和表达强度无统计学差异（P>0.05）。结论 CD44v6和COX-2能够通过协同作用,共同促进多形性腺瘤发生、侵袭、复发和恶化。