Objective To investigate the expression of T cell receptor (TCR) Vβ8.3 gene on CD4+ T lymphocytes in the rats with experimental autoimmune uveoretinitis (EAU). Methods Eighteen Lewis rats were divided into EAU, complete Freund′s adjuvant, and the control group. Inter photoreceptor retinoid-binding protein (IRBP) R16 peptide was synthesized using Fmoc procedure for induction of EAU. Magnetic absorption cell sorting (MACS) me thod was used to isolate the CD4+T lymphocytes from the spleen of the rats. Flow cytometry was used to monitor the efficiency of isolation. The expression of TCR Vβ8.3 gene segment on CD4+T lymphocytes was determined by fluorescent quantitative polymerase chain reaction. Results EAU was successfully induced in the Lewis rats immunized with IRBP R16 peptide. The proportion of CD4+T lymphocytes isolated by means of MACS was statistically higher than that before isolation (P＜0.001). The expression of TCR Vβ8.3 gene segment on CD4+ T lymphocytes in EAU rats was significantly higher than that in the control (P＜0.05). Conclusions There is a predominant usage of antigen-specific TCR Vβ 8.3 gene in EAU rats induced by IR BP R16 peptide, which may serve as a target for immunotherapy of EAU. (Chin J Ocul Fundus Dis，2004，20：165-167)
目的 探讨“5.12”地震后北川羌族人群中类风湿关节炎（RA）患者外周血 T细胞亚群的表达情况并分析创伤后应激障碍（PTSD）对RA患者细胞免疫之间的影响。 方法 2009年3月－2010年3月，对98例北川羌族RA患者、112例健康对照，以及同期绵阳郊区84例RA患者、120例健康对照进行分析。用流式细胞仪分别检测CD3+、CD3+CD4+、CD3+ CD8+ T淋巴细胞数及CD4/+CD8+比值， RA疾病活动性采用DAS28测定，应用美国精神障碍诊断与统计手册第4版（DSM-Ⅳ）诊断标准调查RA人群中的PTSD患者，应用PTSD检查表平时版（PCL-C）检查对PTSD患者进行分析。 结果 北川羌族与绵阳郊区RA活动组患者（分别为58例、39例）与健康对照组比较，CD8+ T淋巴细胞数降低，CD+4/CD8+比值增高，差异有统计学意义（P＜0.05）；北川羌族RA活动组与绵阳郊区RA活动组比较，CD3+ T淋巴细胞数降低，差异有统计学意义（P＜0.05）。北川RA患者中PTSD者（38例）与非PTSD者（60例）比较，PTSD组CD3+ T淋巴细胞数和CD4+/CD+8比值均明显低于PTSD组，差异有统计学意义（P＜0.05）；PCL-C对北川RA患者中PTSD的测定发现，PCL高分组CD3+ T淋巴细胞数显著低于PCL低分组（P＜0.05）。 结论 “5.12”地震后一部分RA患者出现T细胞免疫功能异常，且免疫功能异常与PTSD有关，对合并有PTSD的进行RA患者早期心理干预及药物治疗，改善患者生存质量。
ObjectiveTo investigate the levels of regulatory T cells (Treg) and FoxP3 gene in patients with gastric cancer before and after operation. MethodsTwenty patients with definite diagnosis of gastric cancer and 15 healthy volunteers were selected. The levels of Treg and T cell subsets in peripheral blood were determined by detecting of CD4 and CD25 with immunefluorescence stain and flow cytometry, the expressions of FoxP3 mRNA in these Treg were detected by RTPCR technique. The expression of FoxP3 protein in the gastric cancer tissue was measured by immunohistochemistry assay. ResultsThe percentage of Treg cells in total CD4+ T isolated from the patients with gastric cancer was higher than that of healthy volunteers 〔(19.39±5.58)% versus (9.91±3.23)%, Plt;0.01〕, and it markedly decreased after operation 〔（13.50±5.93）% versus (19.39±5.58)%, Plt;0.05〕. The FoxP3 mRNA expression in the patients with gastric cancer was also higher than that of healthy volunteers (0.86±0.03 versus 0.64±0.02, Plt;0.01), and decreased after operation (0.73±0.04 versus 0.86±0.03, Plt;0.05). The percentage of CD4+T cell in mononucleocytes of peripheral blood of patients with gastric cancer was significantly lower than that of healthy volunteers (Plt;0.01), but the difference was not significant between before and after operation. FoxP3 protein expressed in cytoplasm of 13 patients with gastric cancer, in which bly positive in 2 cases, middle positive in 6 cases, weakly positive in 5 cases. FoxP3 protein didn’t express in cytoplasm of 7 patients with gastric cancer. ConclusionsTreg may have a significant effect on the onset and development of gastric cancer through immunosuppressive effect. Tumor tissue is an important initiating agent on Treg proliferation.
Objective To investigate the clinical implication on expression of HLA class I in breast cancer tissures.Methods The expression of HLA class I in 271 patients with breast cancer that underwent radical operation was examinedby using immunohistochemically， and the correlation between the expression of HLA class I and clinicalpathological characteristics and prognosis of breast cancer was analyzed. Results The b positive expression of HLA class I in breast cancer tissures was observed in 92 patients （33.9%）， the expressions of HLA class I in 179 patients （66.1%）were downregulation. The expression of HLA class I expression in breast cancer tissures was significantly associated with the axillary lymph node metastasis， TNM stage （P＜0.05）， other lymph node metastasis， and vascular invasion （P＜0.05）. The disease free survival rate of patients with positive expression of HLA class I was higher than that expression downregulation of HLA class I （P＜0.05）. Conclusion The examination of HLA class I expression is useful for the prediction of tumor progression and recurrent risk of breast cancer via the antitumor immune system.
Objective To investigate the role of T follicular helper cells (TFH) and their expression of α7 nicotinic acetylcholine receptor (α7nAChR) in patients with Myasthenia gravis (MG). Methods Fifteen MG patients who underwent surgical treatment in the Myasthenia Gravis Comprehensive Diagnosis and Treatment Center of Henan Provincial People's Hospital from June 2022 to June 2023 were selected as the MG group, including 7 males and 8 females, aged 12-30 years. Twelve healthy individuals who underwent partial thymectomy without obstruction during cardiac surgery in Fuwai Central China Cardiovascular Hospital from June 2022 to June 2023 were selected as the healthy control group, including 5 males and 7 females aged 20-35 years. Thymus single cell suspension was obtained by grinding the thymus tissue, and flow cytometry was used to detect the expression of α7nAChR in TFH cells. The thymus cell suspension was purified using density gradient centrifugation, followed by immunomagnetic bead separation to obtain CD4+T cells. CXCR5 antibody and coupled magnetic beads were added to isolate TFH cells. Real-time fluorescent polymerase chain reaction (RT-PCR) and Western blotting were performed to further investigate the expression of α7nAChR in TFH cells. Results Compared with the healthy control group, there was a significant decrease in α7nAChR levels within thymic TFH cells in the MG group (P<0.001), along with significantly decreased mRNA and protein expression levels of α7nAChR within these cells (P<0.01). Conclusion The findings suggest that there is a reduced expression of α7nAChR within thymic TFH cells in MG patients, leading to weakened immunosuppressive function which may indirectly contribute to disease onset and progression.
Objective To explore the role of CD4+CD25+ Treg cells in chronic pulmonary infection caused by Pseudomonas aeruginosa(PA).Methods Sixty SD rats were randomly divided into a PA group and a control group(n=30 in each group).Chronic lung infection model was established by implantation of silicone tube precoated with PA into the main bronchus.Twenty-eight days later Treg cells in peripheral blood were measured by fluorescence-activated cell sorting（FACS）.Levels of IL-10 and TGF-β in serum were assayed by ELISA.The expression of Foxp3 mRNA in spleen was measured by RT-PCR.Pathological changes of lung tissue were studed by HE staining.Results Treg/CD4+ T cells in the PA group were significantly more than those in the control group[（19.79±6.45）% vs （5.15±0.47）%，Plt;0.05].The levels of IL-10 and TGF-β were (231.52±54.48)pg/mL and （121.05±7.98）pg/mL in the PA group respectively，which were significantly higher than those in the control group[（35.43±23.56）pg/mL and （36.02±8.94）pg/mL].The expression of Foxp3 mRNA in the PA group was significantly higher compared with the control group(0.80±0.044 vs 0.25±0.054，Plt;0.05）.HE staining revealed that PA caused a intensive inflammatory reaction with lymphocytes infiltration.Conclusion CD4+CD25+ Treg cell is up-regulated and plays an important role in chronic lung infection caused by Pseudomonas aeruginosa.
Objective To investigate the anti-rejection effect and the mechanism of triptolide （TPT） on islet allo- grafts in a murine model. Methods BALB/c mice were used as islet donor. C57BL/6 mice were rendered diabetic by streptozotocin （STZ） injection， and transplanted with islets under the left kidney capsule. The recipients were randomly （method of random digits table） divided into three groups （n=8）. The mice in the treatment groups were injected intrap-eritoneally with TPT at 50 μg/kg （low-dose TPT group， L-TPT group） or 100 μg/kg （high-dose TPT group， H-TPT group） daily in the first 5 days and then on alternate days until 14 days；while the mice in control group were given vehicles （1% tween 80）. Blood glucose after operation were monitored. The grafts were defined as rejection when two consecutive reading of blood glucose＞20 mmol/L. The left kidney of three recipients in each group were resected for pathological examination. The proportion of CD4＋CD25＋Foxp3＋ regulatory T cells in spleen tissues were tested by flow cytometry. Results The median survival time of islet allografts from the control group， L-TPT group， and H-TPT group were 12.6 days （9-16 days）， 21.4 days （14-27 days） ， and 27.6 days （19-34 days）， respectivly. The percentageof CD4＋CD25＋Foxp3＋regulatory T cells in spleen tissues of three groups were （5.2±0.6）%， （12.0±1.3）%， and（15.7±1.8）%， respectivly. Compared with control group， the median survival time of islet transplantation in mice exte-nded and the proportion of CD4＋CD25＋Foxp3＋ regulatory T cells in spleen tissues increased （P＜0.05）. Conclusions TPT could increase the percentage of CD4＋CD25＋Foxp3＋ regulatory T cells， reduce the rejection after islet transplanta-tion， and prolong the survival time of islet transplantation in mice. The immunosuppressive effect of TPT shows a dose-dependent.
【摘要】 目的 采用系统评价方法，评估干扰素（IFN）治疗蕈样霉菌病（MF）的疗效及安全性。 方法 计算机检索截止2010年5月的Cochrane协作网系统评价方法，纳入所有比较IFN与其他方法治疗MF的随机对照试验及临床对照试验进行质量评价，采用RevMan 5.0.24软件进行Meta分析。 结果 共纳入6篇符合标准的已发表文献，包括142例受试者。Meta分析结果显示: IFN-α单独使用对MF的疗效优于安慰剂组[OR=69.36，95%CI（3.71～1 296.64）]及地精丹方剂[OR=35.53，95%CI（1.78～710.56）]；而IFN-α与胸腺肽[OR=15.11，95%CI（0.71～322.61）]及IFN-α+阿维A酯[OR=3.10，95%CI（0.79～12.12）]的临床疗效差异无统计学意义；IFN-γ联合窄谱中波紫外线（NB-UVB）治疗与单用NB-UVB的临床疗效差异无统计学意义[OR=15.00，95%CI （0.46～485.32）]。90%的患者出现轻度“流感样症状” 的不良反应，多可缓解及消退。 结论 IFN是目前治疗MF的一线用药，疗效确切且大部分患者耐受性较好。【Abstract】 Objective To evaluate the clinical efficacy and side effects of interferon (IFN) in the treatment of mycosis fungoides (MF) with the method of systematic review. Methods According to the Cochrane reviewer’s handbook, all the clinical controlled trials involving mycosis fungoides being treated with interferon were retrieved. The Cochrane Collaboration’s software RevMan 5.0.24 was used for meta-analysis. Results Only six papers including 142 patients met the inclusion criteria. Meta-analyses indicated the results as follows: IFN-α monotherapy was more effective than placebo [OR=69.36,95% CI (3.71-1 296.64)] and a traditional Chinese medicine (Di-jing-dan) [OR=35.53,95% CI (1.78-710.56)], but no significant difference was found between INF-α and thymic peptide [OR=15.11, 95% CI (0.71-322.61)], and between IFN-α monotherapy and IFN-α combined with etretinate therapy [OR=3.10, 95% CI (0.79-12.12)]; and there was no significant difference between the efficacy of IFN-γ combined narrowband ultraviolet B (NB-UVB) therapy and that of single NB-UVB therapy [OR=15.00, 95% CI (0.46-485.32)]; Influenza-like side effects occurred to 90% of all the patients, which were usually slight and easy to release. Conclusion Although there are some mild side effects, interferon is safe to treat MF.
Autoimmune ocular diseases are a type of inflammatory eye condition characterized by the involvement of the immune response. This includes various types disease such as autoimmune uveitis, thyroid-associated eye disease, and primary Sjögren's syndrome. In recent years, breakthroughs have been achieved in inducing transplant tolerance, understanding tumor immune evasion, and preventing autoimmune diseases using immune checkpoint molecules. Negative immune checkpoints effectively control disease progression by inhibiting T cell proliferation, reducing inflammatory cytokine levels, and ultimately regulating autoimmune balance. Therefore, the negative immune checkpoint molecules are expected to be used as a new therapeutic target in the future, and the combination therapy through the combination of negative immune checkpoint drugs is expected to become an important direction to improve the efficacy of the treatment of autoimmune diseases.
目的:探讨肝脾γδT细胞淋巴瘤的临床表现、病理学特征、免疫表型特点。方法:对我院2例确诊的肝脾γδT细胞淋巴瘤患者的临床资料进行分析、追踪随访并进行文献复习。 结果:该组患者均为青年男性,肝脾不同程度长大,发热,全血细胞减少(1/2),肝功能受损,淋巴结未受累;病理示瘤细胞弥漫性肝、骨髓的窦内侵犯;免疫表型:患者瘤细胞表达CD2(+)、CD3(+)、CD56(+)、CD16(+)、CD20()、TIA1(+)、TCRγ／δ(+)。结论:肝脾γδT细胞淋巴瘤是较为罕见的外周T细胞淋巴瘤,以肝脾长大、发热为主要临床表现,通常淋巴结不受累,病情进展快,疗效差,生存期短。