脂欣康胶囊对血管平滑肌细胞源性泡沫细胞CD36表达的影响

目的探讨脂欣康胶囊对动脉粥样硬化泡沫化细胞形成的可能调控机制,观察脂欣康胶囊及洛伐他汀干预大鼠血管平滑肌细胞源性泡沫细胞CD36mRNA表达的变化。方法用组织贴块培养法培养血管平滑肌细胞,以氧化型低密度脂蛋白使其泡沫化,并以脂欣康胶囊和洛伐他汀分别干预。采用流式细胞仪和原位杂交技术观察CD36mRNA表达的变化。结果与生理盐水组和空白对照组相比,脂欣康胶囊与洛伐他汀均能降低CD36mRNA的表达(P<0.01),且脂欣康组较洛伐他汀组下降更显著(P<0.05)。结论脂欣康与洛伐他汀均能抑制CD36的表达,并且其作用优于洛伐他汀。其作用机制可能为脂欣康的益气活血、解毒化浊之功使平滑肌细胞内蕴藏的痰浊瘀毒得以疏布排泄于外。这可能是其抑制血管平滑肌细胞增殖和泡沫化细胞形成的机制之一。     

miR-22 regulates cell invasion,migration and proliferation in vitro through inhibiting CD147 expression in tongue squamous cell carcinoma

ObjectivesTongue squamous cell carcinoma (TSCC) is the most common type of head and neck squamous cell carcinoma (HNSCC) in China, and its survival rate remains unsatisfactory. miR-22 has been identified as a tumor suppressor in many human cancers, and high expression of CD147 occurs in many tumors. The aim of the present study was to investigate the expression and function of miR-22 in TSCC and its relationship with the expression of CD147.MethodsTCA8113 cells were transiently transfected with a miR-22 mimic/inhibitor. Subsequently, a validation with Real-time RT-PCR was performed to analyze the miR-22 expression level, and a CCK-8 proliferation assay and transwell migration and invasion assays were carried out. Cotransfections using As-miR-22/si-CD147 mRNA or a miR-22/CD147 overexpression vector were applied, and we investigated the biological effects on cotranscribed TCA8113 cells.ResultsqRT-PCR confirmed that miR-22 or As-miR-22 were successfully transfected into TCA8113 cells. Suppressing miR-22 resulted in a promotion of cell proliferation and motility and an up-regulation of CD147 in TCA8113 cells in vitro. In contrast, increasing miR-22 inhibited cell proliferation and motility and down-regulated CD147. Furthermore, the reduction or overexpression of CD147 can reverse the promoting or suppressive effects of miR-22, respectively.ConclusionsThe down-expression of miR-22 can regulate cell growth and motility in TSCC cells, which indicates that miR-22 acts as a tumor suppressor in TSCC. Additionally, CD147 is subsequently up-regulated when miR-22 inhibited. Taken together, the findings of this research defined a novel relationship between the down-regulation of miR-22 and the up-regulation of CD147 and demonstrated that CD147 is a downstream factor of miR-22.     

Clonal CD5-positive B lymphocytes in myelodysplastic syndrome with systemic vasculitis and trisomy 8

 Bone marrow and peripheral blood from a myelodysplastic syndrome (MDS) patient with trisomy 8 and associated systemic vasculitis was investigated for clonal lymphoid lineage involvement using simultaneous metaphase and interphase fluorescence in situ hybridization (FISH) and immunocytochemistry with antibodies against CD13 (granulocytic), glycophorin A (GPA, erythroid), and the lymphocytic antigens CD3, CD5, CD20, and CD22. Trisomy 8 was detected in 55% of CD13+, 40% of GPA+, 6% of CD5+, and 5% of CD20/22+, but not in CD3+ cells. In a complementary experiment using interphase FISH on bone marrow cells sorted by flow cytometry, 13% of CD5/CD19 double-positive cells (76% purity) were found to be trisomic. The results indicate the existence of a small CD5-positive B-lymphoid clone as part of the MDS process in this patient. Since CD5/19-positive cells have been proposed to be autoantibody producing, this finding might be a clue to the pathogenesis underlying the propensity for MDS patients to develop immune-mediated complications. Received: 2 September 1996 / Accepted: 17 October 1996     

Soluble CD4, CD8 in patients with polymyositis/dermatomyositis

Summary The concentrations of soluble CD4 (sCD4) and soluble CD8 (sCD8) were determined in 64 patients with polymyositis/dermatomyositis (PM/DM). The patients with PM/DM had significantly higher concentrations of sCD8, though the concentrations of sCD4 did not significantly increase. Patients with high concentrations of sCD8 tended to have too high concentrations of soluble interleukin-2 receptor (sIL-2R). The patients with high levels of myogenic enzymes tended to have high concentrations of sCD8. The results of a serial study indicated that the concentrations of sCD8 decreased simultaneously with the decrease of the myogenic enzymes. These results may suggest that the activation of CD8⁺ cells are related to muscular involvement.     

血清可溶性CD40L水平与2型糖尿病视网膜病变的关系

目的 探讨血清可溶性CD40L(sCD40L)水平与2型糖尿病视网膜病变(DR)的关系.方法应用酶联免疫吸附法对30例无DR的糖尿病患者(NDR)、29例非增生性DR患者(NPDR)、31例增生性DR患者(PDR)和32名正常人的血清sCD40L水平进行测定.结果 NDR组、NPDR组和PDR组患者血清sCD40L水平依次增高,分别为4.55±3.66μg/L、6.65±4.24 μg/L、8.31±5.23μg/L ,各组间差异均有统计学意义(P均<0.01).结论 DR患者血清sCD40L水平显著增加,提示其可能与DR的发生有关.     

Transient immunological control during acute hepatitis C virus infection: ex vivo analysis of helper T-cell responses

Summary.  Hepatitis C virus (HCV) readily sets up persistence after acute infection. Cellular immune responses are thought to play a major role in control of the virus. Failure of CD4+ T-cell responses in acute disease is associated with viral persistence but the dynamics of this are poorly understood. We aimed to assess such responses using a novel set of Class II tetrameric complexes (tetramers) to study helper T-cells ex vivo in acute disease. We analysed the HCV-specific CD4+ T-cell response in a patient with acute hepatitis c infection. We were able to track the virus-specific CD4+ T-cells directly ex vivo with HLA DR4 tetramers. Proliferative responses were absent initially, recovered as viral load dropped and were lost again during relapse. Longitudinal tetramer analyses showed expanded populations of antiviral CD4+ T-cells throughout acute infection despite lack of proliferation. A pattern of transient CD4+ T-cell proliferative responses as HCV is partially controlled is observed. Failure to control virus is associated with emergence of 'dysfunctional' CD4+ T-cell populations. Failure to control HCV in acute disease may relate to the capacity to sustain efficient immune responses as virus attempts to 'bounce back' after partial control.     

Hydroxyurea treatment reduces haematopoietic progenitor growth and CD34 positive cells in polycythaemia vera and essential thrombocythaemia

The aim of the present work was to investigate the effect of hydroxyurea (HU) treatment on haematopoietic progenitors and CD34 positive (CD34+) cells in patients with polycythaemia vera (PV) and essential thrombocythaemia (ET). Of the PV patients were 10 treated with phlebotomy only and 10 were on HU therapy. Seven ET patients were untreated and 10 received HU. In each subject peripheral blood was obtained for in vitro colony growth, determination of CD34+ cells and plasma erythropoietin (EPO) concentration. The mean number of EPO independent erythroid colonies (EEC) was higher in the group of PV patients on phlebotomy therapy compared to the PV patients treated with HU (74.4 and 8.0 colonies/10(5) cells, respectively) but the difference did not reach statistical significance. The corresponding means for the untreated ET patients and ET patients treated with HU were 13.0 and 1.3 colonies/10(5) cells, respectively, this difference being statistically significant (p = 0.012). The mean EEC for combined groups of PV and ET without myelosuppressive treatment were compared with the results for PV and ET patients on HU therapy; this difference was statistically significant (p = 0.014). The same pattern was observed for total erythroid growth with EPO. The relationship between the concentration of CD34+ cells and total EEC in peripheral blood was statistically significant for both PV (p<0.005) and ET (p<0.01). This finding supports the hypothesis that the level of CD34+ cells in peripheral blood could be used as a proliferation marker in these two myeloproliferative entities. No relationship between plasma EPO and EEC was present. It therefore appears that the reported differences in plasma/serum EPO concentrations between PV patients on phlebotomy treatment compared to patients on myelosuppressive treatment are not likely to be found at the production site for erythrocytes.     

Soluble syndecan-1 (sCD138) as a prognostic factor independent of mutation status in patients with chronic lymphocytic leukemia

Syndecan-1 (sCD138) is a transmembrane heparan sulfate-bearing proteoglycan expressed in epithelial cells as well as hematopoietic cells that demonstrate plasmacytoid differentiation. Higher levels of sCD138 correlate with poor outcome in myeloma. We examined the association of circulating sCD138 levels in plasma with clinical behavior in 104 patients with chronic lymphocytic leukemia. sCD138 levels were significantly higher in patients (median, 52.8 ng/ml; range, 13.4-252.7 ng/ml) than in healthy control subjects (median, 19.86; range, 14.49-33.14 ng/ml) (P < 0.01). Elevated sCD138 (>median, 52.8 ng/ml) was associated with significantly shorter survival (P = 0.0004); this association was independent of IgVH mutation status, beta2-microglobulin (beta2-M) level, and treatment history. Patients with mutated IgVH but high sCD138 levels (>52.8 ng/ml) had significantly shorter survival than those with mutated IgVH and lower levels of sCD138. Similarly, patients with unmutated IgVH but high sCD138 levels had significantly shorter survival than those with lower sCD138 levels and unmutated IgVH (P = 0.007). In a multivariate Cox regression model, only Rai stage, beta2-M, and sCD138 remained predictors of survival. These data suggest that sCD138 when combined with beta2-M and Rai stage, may replace the need for testing IgVH mutation status.     

BST-2在pSS患者唇腺、外周血淋巴细胞中的表达及增殖作用

目的探讨原发性舍格伦综合征(pSS)患者唇腺及外周血B淋巴细胞中骨髓基质细胞抗原2(BST-2)的表达情况及其在pSS中的作用。方法将2017年9月至2018年3月在内蒙古自治区人民医院接受治疗的40例pSS患者作为pSS组;将同期体检的30例健康者作为对照组。采用实时荧光定量PCR检测纳入研究者的唇腺组织及外周血B淋巴细胞中BST-2的表达水平。免疫组织化学法检测唇腺组织内BST-2的表达情况,并分析BST-2对淋巴细胞增殖的影响。结果pSS组的外周血B淋巴细胞和唇腺组织中BST-2的表达水平明显高于对照组(P<0.05);pSS患者唇腺组织中浸润的局灶性淋巴细胞和少数周围导管上皮内BST-2表达量较高,而在对照组中仅在导管上皮细胞内存在散在性少量表达。连续切片的pSS患者唇腺组织染色显示,pSS患者的唇腺组织内CD19染色阳性细胞和BST-2阳性细胞基本一致。结论pSS患者唇腺组织和外周血B淋巴细胞BST-2水平明显增高;BST-2通过对腺体内B淋巴细胞的浸润及增殖,参与pSS的发病及进展。     

CD40L基因c.674T>C突变的X连锁高IgM综合征1例报道

目的探讨高IgM综合征的特点、临床表现、实验室检查与治疗。方法回顾性分析1例X连锁高IgM综合征患者的临床资料。结果患儿以反复呼吸道感染入院,免疫功能检查提示IgG、IgA明显降低,IgM明显升高;基因检测结果示CD40L基因c.674T>C突变,给予抗感染、定期静脉滴注人免疫球蛋白等治疗。结论高IgM综合征临床表现缺乏特异性,依靠基因检测进行诊断;规律人免疫球蛋白替代治疗可能会提高患儿生存质量,延长寿命。