Controlling malignant pericardial effusion by intrapericardial administration of recombinant mutant human tumor necrosis factor in patients with carcinoma

Objective: To evaluate the therapeutic efficacy of injecting recombinant mutant human tumor necrosis factor (rmhTNF) into pericardial cavity of carcinoma patients with malignant pericardial effusion. Methods: In 20 cases of malignant pericardial effusion, the intrapericardial catheter was inserted into pericardial cavity, and then rmhTNF of 1.5 × 107 U was infused. The infusion was repeated every 5-7 days with the total 4-6 times. If the effusion disappeared, rmhTNF was then used 2 more times and then the intrapericardial catheter was pulled out. Results: Of 20 patients, 14 were complete response (CR), 4 were partial response (PR) and 2 no change (NC). The disappearance of effusion in 6 cases lasted for more than 6 months. Conclusion: Injecting rmhTNF into pericardial cavity may be a better way to control malignant pericardial effusion and has mild side effects.

Quercetin exerts anti-inflammatory effects via inhibiting tumor necrosis factor-α-induced matrix metalloproteinase-9 expression in normal human gastric epithelial cells

BACKGROUND Gastric injury is the most common digestive system disease worldwide and involves inflammation,which can lead to gastric ulcer or gastric cancer(GC).Matrix metallopeptidase-9[MMP-9(gelatinase-B)]plays an important role in inflammation and GC progression.Quercetin and quercetin-rich diets represent potential food supplements and a source of medications for treating gastric injury given their anti-inflammatory activities.However,the effects and mechanisms of action of quercetin on human chronic gastritis and whether quercetin can relieve symptoms remain unclear.AIM To assess whether tumor necrosis factor-α(TNF-α)-induced MMP-9 expression mediates the anti-inflammatory effects of quercetin in normal human gastric mucosal epithelial cells.METHODS The normal human gastric mucosa epithelial cell line GES-1 was used to establish a normal human gastric epithelial cell model of TNF-α-induced MMP-9 protein overexpression to evaluate the antiinflammatory effects of quercetin.The cell counting Kit-8 assay was used to evaluate the effects of varying quercetin doses on cell viability in the normal GES-1 cell line.Cell migration was measured using Transwell assay.The expression of proto-oncogene tyrosine-protein kinase Src(cSrc),phospho(p)-c-Src,extracellular-signal-regulated kinase 2(ERK2),p-ERK1/2,c-Fos,p-c-Fos,nuclear factor kappa B(NF-κB/p65),and p-p65 and the effects of their inhibitors were examined using Western blot analysis and measurement of luciferase activity.p65 expression was detected by immunofluorescence.MMP-9 m RNA and protein levels were measured by quantitative reverse transcription polymerase chain reaction(q RT–PCR)and gelatin zymography,respectively.RESULTS q RT-PCR and gelatin zymography showed that TNF-αinduced MMP-9 m RNA and protein expression in a dose-and time-dependent manner.These effects were reduced by the pretreatment of GES-1 cells with quercetin or a TNF-αantagonist(TNFR inhibitor)in a dose-and timedependent manner.Quercetin and TNF-αantagonists decreased the TNF-α-induced phosphorylation of c-Src,ERK1/2,c-Fos,and p65 in a dose-and time-dependent manner.Quercetin,TNF-αantagonist,PP1,U0126,and tanshinone IIA(TSIIA)reduced TNF-α-induced c-Fos phosphorylation and AP-1–Luciferase(Luc)activity in a dose-and time-dependent manner.Pretreatment with quercetin,TNF-αantagonist,PP1,U0126,or Bay 11-7082 reduced TNF-α-induced p65 phosphorylation and translocation and p65–Luc activity in a dose-and timedependent manner.TNF-αsignificantly increased GES-1 cell migration,and these results were reduced by pretreatment with quercetin or a TNF-αantagonist.CONCLUSION Quercetin significantly downregulates TNF-α-induced MMP-9 expression in GES-1 cells via the TNFR-c-Src–ERK1/2 and c-Fos or NF-κB pathways.

Inhibition of telomerase with human telomerase reverse transcriptase antisense increases the sensitivity of tumor necrosis factor-α-induced apoptosis in prostate cancer cells

Aim： To investigate the effect of inhibition of telomerase with human telomerase reverse transcriptase （hTERT） antisense on tumor necrosis factor-α （TNF-α-induced apoptosis in prostate cancer cells （PC3）. Methods： Antisense phosphorothioate oligodeoxynucleotide （AS PS-ODN） was synthesized and purified. Telomerase activity was measured using the telomeric repeat amplification protocol （TRAP） and polymerase chain reaction enzyme-linked immunoassay （PCR-ELISA）. hTERT mRNA was measured by reverse transcription PCR （RT-PCR） assay and gel-image system, hTERT protein was detected by immunochemistry and flow cytometry. Cell viability was detected by 3-（4, 5-dimethylthiazol-2-yl）-2,5-Diphenyltetrazolium （MTT） assay. Cell apoptosis was observed by morphological method and determined by flow cytometry. Results： The telomerase activity decreased with time after hTERT AS PS-ODN treatment. The levels of hTERT mRNA decreased with time after hTERT AS PS-ODN treatment, which appeared before the decline of the telomerase activity. The percentage of positive cells of hTERT protein declined with time after hTERT AS PS-ODN treatment, which appeared after the decline of hTERT mRNA. There was no difference in telomerase activity, hTERT mRNA and protein levels between hTERT sense phosphorothioate oligodeoxynucleotide （S PS-ODN） and the control group. The cell viability decreased with time after hTERT AS PS-ODN combined with TNF-α treatment. The percentage of apoptosis increased with time after hTERT AS PS-ODN combined with TNF-α treatment. There was no difference in cell viability and the percentage of apoptosis between hTERT S PS-ODN and the control group. Conclusion： hTERT AS PS-ODN can significantly inhibit telomerase activity by downregulating the hTERT mRNA and protein expression, and inhibition of telomerase with hTERT antisense can enhance TNF-α- induced apoptosis of PC3 cells.

Upregulation of stromal cell-derived factor-1 alpha/CXCR4 axis-induced migration of human neural progenitors by tumor necrosis factor-alpha and interleukin-8

BACKGROUND： Studies of several animal models of central nervous system diseases have shown that neural progenitor cells （NPCs） can migrate to injured tissues. Stromal cell-derived factor 1 alpha （SDF-la）, and its primary physiological receptor CXCR4, have been shown to contribute to this process. OBJECTIVE： To investigate migration efficacy of human NPCs toward a SDF-1α gradient, and the regulatory roles of tumor necrosis factor-α （TNF-α） and interleukin-8 （IL-8） in SDF-1α/CXCR4 axis-induced migration of NPCs. DESIGN, TIME AND SETTING： An in vitro, randomized, controlled, cellular and molecular biology study was performed at the Laboratory of Department of Cell Biology, Medical College of Soochow University between October 2005 and November 2007. MATERIALS： SDF-1α and mouse anti-human CXCR4 fusion antibody were purchased from R＆D Systems, USA. TNF-αwas purchased from Biomyx Technology, USA and IL-8 was kindly provided by the Biotechnology Research Institute of Soochow University. METHODS： NPCs isolated from forebrain tissue of 9 to 10-week-old human fetuses were cultured in vitro. The cells were incubated with 0, 20, and 40 ng/mL TNF-α, or 0, 20, and 40 ng/mL IL-8, for 48 hours prior to migration assay. For antibody-blocking experiments, cells were further pretreated with 0, 20, and 40 μg/mL mouse anti-human CXCR4 fusion antibody for 2 hours. Subsequently, the transwell assay and CXCR4 blockade experiments were performed to evaluate migration of human NPCs toward a SDF-1α gradient. Serum-free culture medium without SDF-1α served as the negative control. MAIN OUTCOME MEASURES： The transwell assay was performed to evaluate migration of human NPCs toward a SDF-1α gradient, which was blocked by fusion antibody against CXCR4. In addition, CXCR4 expression in human NPCs stimulated by TNF-α and IL-8 was measured by flow cytometry. RESULTS： Results from the transwell assay demonstrated that SDF-1α was a strong chemoattractant for human NPCs （P 〈 0.01）, and 20 ng/mL produced the highest levels of migration. Anti-human CXCR4 fusion antibody significantly blocked the chemotactic effect （P 〈 0.05）. Flow cytometry results showed that treatment with TNF-α and IL-8 resulted in increased CXCR4 expression and greater chemotaxis efficiency of NPCs towards SDF-1α（P 〈 0.01）. CONCLUSION： These results demonstrated that SDF-la significantly attracted NPCs in vitro, and neutralizing anti-CXCR4 antibody could block part of this chemotactic function. TNF-α and IL-8 increased chemotaxis efficiency of NPCs towards the SDF-1αgradient by upregulating CXCR4 expression in NPCs.

Effect of tumor necrosis factor-α on ventricular arrhythmias in rats with acute myocardial infarction in vivo

Acute myocardial infarction （AMI） is an acute cardiovascular emergency. This study was undertaken to assess the effect of tumor necrosis factor-a （TNF-a） on ventricular arrhythmias induced byAMI in rats in vivo. Two hundred and forty male Wistar rats were randomized into a sham- operation group, an AMI group, and a recombinant human tumor necrosis factor receptor：Fc fusion protein（rhTNFR：Fc） group. Acute anterior wall myocardial infarction was produced in the AMI group by ligating the left anterior descending coronary artery （LAD）, and there was no ligation but operation in the sham-operation group. The rhTNFR：Fc group was treated with rhTNFR：Fc（10 mg/kg）, a TNF-a antagonist, 24 hours before LAD ligation. The spontaneous and induced programmed electrical stimulation ventricular arrhythmias were recorded at baseline and 10 minutes, 20 minutes, 30 minutes, 60 minutes, 3 hours, 6 hours and 12 hours after ligation. At the same time the protein and mRNA expression levels of TNF-a among different groups were detected by histochemistry and real-time fluorescent quantitative PCR. Expression of TNF-a increased markedly from 10 minutes after infarction, peaked at 20-30 minutes, and returned to baseline gradually in the AMI group and rhTNFR：Fc group. The time- windows of spontaneous and induced ventricular arrhythmias were similar. Compared with the AMI group, the rhTNFR：Fc group showed a lesser expression of TNF-a protein and a lower incidence of ventricular arrhythmias （P〈0.05）. There was no obvious change in the sham-operation group. The expression of TNF-a induced by AMI could contribute to the onset of ventricular arrhythmias.

重组人Ⅱ型肿瘤坏死因子受体-抗体融合蛋白治疗中毒性表皮坏死松解症的疗效及安全性

目的探讨重组人Ⅱ型肿瘤坏死因子受体-抗体融合蛋白(rhTNFR:Fc)治疗中毒性表皮坏死松解症(TEN)患者的临床疗效及安全性。方法回顾性选取2020年1月至2022年1月海南医学院第一附属医院TEN患者20例,均给予rhTNFR:Fc治疗。治疗21 d后,记录TEN患者临床疗效,比较治疗前与治疗后不同时段(治疗后7、14、21 d)的药疹面积和严重程度指数(DASI)评分[DASI评分平均值,50%DASI(DASI50)、75%DASI(DASI75)、90%DASI(DASI90)所占比例]、血清肿瘤坏死因子α(TNF-α)水平、体温下降时间、皮疹控制时间、住院时间及药物治疗的安全性。结果治疗21 d后,TEN患者中,显效18例(90.00%),有效2例(10.00%)。TEN患者治疗后7、14、21 d的DASI评分分别为(30.44±5.68)、(5.28±2.31)、(2.04±1.12)分,均明显低于治疗前[(52.34±7.45)分],差异均有统计学意义(P<0.05)。相较治疗前、治疗7 d、治疗14 d,治疗21 d后的DASI50(100.00%)、DASI75(100.00%)、DASI90(90.00%)的改善比率最高,差异均有统计学意义(P<0.05)。TEN患者治疗后7、14、21 d的血清TNF-α水平分别为(22.73±5.58)、(15.99±4.60)、(4.44±1.10)pg/mL,均低于治疗前[(33.63±17.36)pg/mL],差异均有统计学意义(P<0.05)。TEN患者体温下降时间为(2.49±0.81)d,皮疹控制时间为(5.19±1.90)d,住院时间为(11.92±4.20)d。治疗期间患者未出现终止治疗或失访,均未出现急性不良反应,随访期间病情未见复发,定期复查结果显示并无合并症、活动性肝炎与结核疾病等。结论rhTNFR:Fc作为治疗TEN疾病的药物其疗效随治疗时间延长而提高,可降低血清TNF-α水平与DASI评分,且安全性较高。

Construction of novel tumor necrosis factor-alpha mutants with reduced toxicity and higher cytotoxicity on human tumor cells

Two tumor necrosis factor-a mutants MT1 (32Trp157Phe) and MT2 (2Lys30Ser- 32Trp157Phe) were constructed by site-directed mutagenesis. These mutants were soluble and over-expressed in E. coli. The purity of purified mutants was above 95% by serial chromatography. The results of Western blot indicated that these mutants could be cross-reactive with monoclonal antibody against native hTNF-a. Compared to parent hTNF-a, the cytotoxicity of these mutants on murine fibrosarcoma L929 cell lines reduced 4—5 orders of magnitude but was equivalent to that of native hTNF-a on human tumor cell lines. The LD50 of mutant MT1 was reduced to 0.34% of wild type and the dose of MT2 that resulted in 30% death of mice reduced to less than 1/700 that of parent hTNF-a.

病毒性脑膜炎患儿血清和脑脊液中IP-10和TNF-α的表达情况及临床意义

目的探讨肿瘤坏死因子-α(TNF-α)、重组人干扰素诱导蛋白-10(IP-10)在病毒性脑膜炎患儿血清和脑脊液中的表达情况及临床意义。方法选取2019年7月至2020年12月在邢台市人民医院儿三科因急性中枢神经系统感染住院治疗的100例患儿作为研究对象。以脑膜炎感染类型分为病毒性脑膜炎组(52例)、化脓性脑膜炎组(34例)、结核性脑膜炎组(14例)。采用酶联免疫吸附试验检测所有研究对象血清及脑脊液TNF-α、IP-10水平。采用Pearson相关分析病毒性脑膜炎患儿血清及脑脊液TNF-α水平与IP-10水平的相关性。绘制受试者工作特征(ROC)曲线评估血清及脑脊液TNF-α和IP-10对病毒性脑膜炎的诊断价值。结果结核性脑膜炎组血清及脑脊液TNF-α和IP-10水平均高于化脓性脑膜炎组与病毒性脑膜炎组,且化脓性脑膜炎组均高于病毒性脑膜炎组,差异均有统计学意义(P<0.05)。病毒性脑膜炎患儿血清中IP-10水平与TNF-α水平呈明显正相关(r=0.313,P<0.05)。脑脊液中TNF-α水平与IP-10水平呈明显正相关(r=0.455,P<0.05)。ROC曲线分析结果显示,血清IP-10、TNF-α单独诊断病毒性脑膜炎的曲线下面积(AUC)分别为0.887、0.898,均小于2项指标联合诊断病毒性脑膜炎的0.958(Z=2.010、2.048,P<0.05);脑脊液IP-10、TNF-α单独诊断病毒性脑膜炎的AUC分别为0.926、0.908,均小于2项指标联合诊断病毒性脑膜炎的0.964(Z=2.208、2.260,P<0.05)。结论血清及脑脊液TNF-α和IP-10水平在病毒性脑膜炎患儿中明显降低,2项指标联合检测对病毒性脑膜炎的诊断具有重要临床价值。

重组人Ⅱ型肿瘤坏死因子受体—抗体融合蛋白治疗类风湿关节炎的临床效果

目的 观察重组人Ⅱ型肿瘤坏死因子受体—抗体融合蛋白治疗类风湿关节炎的临床效果及对血清相关指标的影响。方法 选取2020年3月—2022年7月龙岩市第二医院血液风湿科收治的类风湿关节炎患者98例,依据随机抽签法分为联合抗风湿组和常规抗风湿组,每组49例。常规抗风湿组采取常规抗风湿治疗,联合抗风湿组在常规抗风湿组基础上使用注射用重组人Ⅱ型肿瘤坏死因子受体—抗体融合蛋白治疗,2组均持续治疗6个月。比较2组患者临床疗效,治疗前后症状改善情况、血清类风湿炎性指标[C反应蛋白(CRP)、红细胞沉降率(ESR)、类风湿因子(RF)、白介素-6(IL-6)],不良反应。结果 联合抗风湿组治疗总有效率为95.92%,高于常规抗风湿组81.63%(χ^(2)=5.018,P=0.025)。治疗6个月后,2组晨僵时间较治疗前缩短,压痛指数评分、疼痛指数评分较治疗前降低,且联合抗风湿组短/低于常规抗风湿组(P均<0.01);2组CRP、RF、IL-6水平较治疗前下降,ESR较治疗前缩小,且联合抗风湿组低/小于常规抗风湿组(P均<0.01)。联合抗风湿组不良反应总发生率为4.08%,低于常规抗风湿组的18.37%(χ^(2)=5.018,P=0.025)。结论 常规抗风湿治疗基础上采用重组人Ⅱ型肿瘤坏死因子受体—抗体融合蛋白治疗类风湿关节炎的疗效显著,利于临床症状、血清指标的改善,降低炎性因子水平及减少不良反应发生,促进病症好转。

TNF-α抑制剂注射用重组人Ⅱ型肿瘤坏死因子受体-抗体融合蛋白/注射用依那西普致葡萄膜炎2例分析

目的探讨TNF-α抑制剂与葡萄膜炎发病的关系并分析TNF-α抑制剂诱发性葡萄膜炎的临床特点。方法回顾性分析2021年7月至2023年2月某院收治的2例使用TNF-α抑制剂注射用重组人Ⅱ型肿瘤坏死因子受体-抗体融合蛋白注射用依那西普后出现葡萄膜炎患者的临床特征并复习相关文献。结果2例患者葡萄膜炎发生时间分别在用药后2周和6周,其中前葡萄膜炎1例,前、中间葡萄膜炎1例,经对症治疗后均有好转。在持续生物制剂治疗过程中2例患者均有反复发作倾向。查阅文献发现目前引起葡萄膜炎的TNF-α抑制剂主要包括英夫利昔单抗、阿达木单抗等,多用于治疗类风湿性关节炎、肿瘤、强直性脊柱炎、眼内葡萄膜炎患者等。患者年龄区间在5~77岁,发病时间为用药后1周~4年。经系统治疗,停止免疫抑制剂后,绝大多数诱发性葡萄膜炎患者视力可恢复。结论TNF-α抑制剂可以诱发葡萄膜炎的发生,发病类型以前葡萄膜炎为主,且有复发倾向。及时诊疗后患者的视力预后较好。

Inhibition of tumor necrosis factor-α reduces alveolar septal cell apoptosis in passive smoking rats

Background Recent studies have revealed that lung cell apoptosis plays an important role in pathogenesis of cigarette-induced chronic obstructive pulmonary disease （COPD）. Tumor necrosis factor alpha （TNF-α） is one of the most important cytokines which are involved in COPD. This study aimed at investigating the influence of its inhibitor, recombinant human necrosis factor-alpha receptor II：lgG Fc fusion protein （rhTNFR：Fc） on alveolar septal cell apoptosis in passive smoking rats. Methods Forty-eight rats were randomly divided into a normal control group, a passive smoking group, an rhTNFR：Fc intervention group and a sham intervention group. The passive smoking rats were treated by exposure to cigarette smoking daily for 80 days. After smoking for one month the rhTNFR：Fc intervention group was treated with rhTNFR：Fc by subcutaneous injection, the sham intervention group injected subcutaneously with a neutral preparation （normal saline 0.1 ml, manicol 0.8 ml, cane sugar 0.2 mg, Tris 0.024 mg as a control. Lung function was determined and the levels of TNF-a in serum and broncho-alveolar lavage fluid （BALF） were measured with enzyme-linked immunosorbnent assay （ELISA）. Lung tissue sections stained by hematoxylin and eosin （HE） were observed for study of morphological alternations. Mean linear intercept （MLI） and mean alveolar numbers （MAN） were measured and the terminal deoxynucleotidyl transferase-mediated dUTP nick end labeling （TUNEL） method was carried out to determine the percentage of positive cells and distribution of apoptotic cells. Results Increased MLI and decreased MAN were found in the passive smoking group compared with both the normal control group and the rhTNFR：Fc intervention group （P〈0.05）. Forced expiratory volume in 0.3 second （FEVo.3）/forced vital capacity （FVC） and peak expiratory flow （PEF） were lower in the passive smoking group than that in the normal control group （P〈0.05）. Compared with the sham intervention group, FEVo.3/FVC and PEF increased in the rhTNFR：Fc intervention group （P〈0.05）. The levels of TNF-α in serum were higher in the passive smoking group than that in the normal control group （P〈0.05） and rhTNFR：Fc intervention group （P〈0.05）. Significant differences were found between the levels of TNF-α in the serum of the rhTNFR：Fc intervention group and sham intervention group （P〈0.05）. The levels of TNF-α in BALF were higher in the passive smoking group than that in the normal control group （P〈0.05）, but no significant differences of TNF-α levels in BALF were found between the passive smoking group and rhTNFR：Fc intervention group. The number of TUNEL positive cells in alveolar septa was significantly increased in the passive smoking group as compared with the normal control group and the rhTNFR：Fc intervention group （P〈0.05）. Conclusion This study provides preliminary evidence that rhTNFR：Fc may interfere with TNF-α and reduce alveolar septal apoptosis in smoking rats.

重组人源肿瘤坏死因子受体融合蛋白对大鼠下颌骨缺损的干预效果

目的:通过大鼠下颌骨缺损再植的实验动物模型,基于Janus激酶-信号转导与转录激活因子(Janus kinase-signal transducers and activators of transcription,JAK-STAT)通路探讨注射重组人源肿瘤坏死因子受体融合蛋白(recombinant human tumor necrosis factor receptor:Fc fusion protein,rhTNFR:Fc)对下颌骨缺损大鼠的干预效果。方法:将70只(雌雄各半)7~8周龄的健康SD大鼠随机分为3组,分别为空白组(10只)、对照组(30只)和实验组(30只)。实验组:于大鼠骨缺损处注入含有Rh TNFR:Fc(45 mg/kg)的Bio-Oss骨颗粒,其上覆盖Bio-Gide胶原膜;对照组:于大鼠缺损处注入含25μL 0.9%氯化钠溶液的Bio-Oss骨颗粒,同样覆盖Bio-Gide胶原膜;空白对照组为健康大鼠。取所有大鼠下颌骨组织,观察其形态学变化,行组织形态计量学测定。实验组和对照组大鼠于术后3、6、9周时被分批处死,取其左侧下颌骨进行炎症因子白细胞介素-6(interleukin-6,IL-6)和肿瘤坏死因子-α(tumor necrosis factor-α,TNF-α)表达水平的检测,同时检测组织中凋亡相关分子Bax、Bcl-2、p-JAK2和p-STAT3蛋白的表达。结果:与对照组比较,实验组的缺损面积显著减少,IL-6和TNF-α的浓度显著下降,而凋亡相关分子Bax、p-JAK2和p-STAT3的表达显著下降,Bcl-2表达显著升高(P<0.05);与空白组比较,对照组和实验组缺损面积显著增加,缺损模型建立成功。结论:局部注射rh TNFR:Fc与Bio-Oss骨颗粒能够有效地促进下颌骨缺损修复,并且效果显著优于只使用Bio-Oss骨颗粒的组别,其修复作用与抑制细胞凋亡的能力相关,通过实验我们发现JAK2-STAT3细胞信号通路在其中发挥了重要作用。

Recombinant human Flt3 ligand exerts both direct and indirect effects on hematopoiesis

OBJECTIVE: To investigate the direct effects of the Flt3 ligand (FL) on hematopoiesis, such as the stimulation of the formation of hematopoietic colonies and the proliferation of dendritic cells, as well as the indirect stimulation of hematopoiesis, especially via the proliferation of endothelial cells. METHODS: Mononuclear cells from human cord blood were plated in methylcellulose medium containing different cytokines to induce hematopoietic colony formation. Dendritic cells (DCs) were induced from the mononuclear cells with a cytokine cocktail with or without recombinant human soluble FL (rhFL; 100 ng/ml). The Flt3 receptors on the surface of a human microvascular endothelial cell line (ECV) were analyzed by flow cytometry. The proliferation of ECV stimulated by rhFL was measured with the microculture tetrazolium assay. The levels of FL, IL-6, IL-8, G-CSF and GM-CSF in the supernatant of ECV cultures were measured by enzyme linked immunoabsorbent assay (ELISA). RESULTS: rhFL stimulates colony formation from cord blood when used as a sole stimulant. FL in combination with other cytokines increased colony formation significantly. The number of DCs was approximately 2.5 times higher when rhFL was used. rhFL stimulates the proliferation of ECV on which Flt3 receptors are expressed. Furthermore, ECV secretes FL, IL-6, IL-8, G-CSF and GM-CSF, which were augmented by tumor necrosis factor-alpha and rhFL. CONCLUSIONS: rhFL enhances hematopoietic colony formation and DC proliferation from human cord blood cells. FL not only stimulates the proliferation of ECV, but is also secreted by ECV. FL may exert direct and indirect effects on hematopoiesis.

注射用重组人Ⅱ型肿瘤坏死因子受体-抗体融合蛋白联合氨甲蝶呤治疗强直性脊柱炎患者的效果

目的:观察注射用重组人Ⅱ型肿瘤坏死因子受体-抗体融合蛋白联合氨甲蝶呤治疗强直性脊柱炎患者的效果。方法:选取2020年1月至2021年6月该院收治的120例强直性脊柱炎患者进行前瞻性研究,按照随机数字表法分为观察组与对照组各60例。对照组采用氨甲蝶呤治疗,观察组在对照组基础上联合注射用重组人Ⅱ型肿瘤坏死因子受体-抗体融合蛋白治疗,比较两组疗效、血清炎性因子[肿瘤坏死因子-α(TNF-α)、白细胞介素(IL)-1β及IL-17]水平、巴氏强直性脊柱炎功能活动指数(BASFI)评分、巴氏强直性脊柱炎疾病活动指数(BASDAI)评分和不良反应发生率。结果:观察组治疗总有效率为96.67%,明显高于对照组的86.67%,差异有统计学意义(P<0.05);治疗后,两组TNF-α、IL-1β、IL-17水平以及BASFI、BASDAI评分均低于治疗前,且观察组低于对照组,差异有统计学意义(P<0.05);两组不良反应发生率比较,差异无统计学意义(P>0.05)。结论:注射用重组人Ⅱ型肿瘤坏死因子受体-抗体融合蛋白联合氨甲蝶呤治疗强直性脊柱炎患者可提高治疗总有效率,降低炎性因子水平和BASFI、BASDAI评分,效果优于单纯氨甲蝶呤治疗。

生物制剂注射用重组人Ⅱ型肿瘤坏死因子受体-抗体融合蛋白穴位注射治疗强直性脊柱炎42例临床观察

目的:观察生物制剂注射用重组人Ⅱ型肿瘤坏死因子受体-抗体融合蛋白(强克)穴位注射治疗强直性脊柱炎的临床疗效和安全性。方法:将62例强直性脊柱炎患者分为治疗组42例和对照组20例。治疗组采用生物制剂强克次髎穴穴位注射治疗,每次50 mg,每周1次;对照组使用同等剂次强克常规皮下注射治疗。2组均以12周为1个疗程。观察2组患者治疗前后症状、体征、Bath强直性脊柱炎功能指数(BASFI)、脊柱痛评分、夜间痛评分、总体评分(PGA)、红细胞沉降率(ESR)、C反应蛋白(CRP)及相关不良反应。结果:治疗1周、12周后,与治疗前比较,2组PGA、BASFAI、ESR、CRP均显著下降,差异有统计学意义(P<0.05);且治疗组改善程度优于对照组(P<0.05)。治疗1周后,治疗组达到ACR20、ACR50、ACR70改善的患者分别为36例(85.71%)、28例(66.67%)、18例(42.86%),优于对照组的12例(60.00%)、8例(40.00%)、4例(20.00%)(P<0.05);治疗12周后,治疗组达到ACR20、ACR50、ACR70改善的患者分别为40例(95.24%)、35例(83.33%)、33例(78.57%),优于对照组的15例(75.00%)、11例(55.00%)、10例(50.00%)(P<0.05)。2组不良反应均较轻微,治疗组3例,对照组2例出现注射部位反应。结论:采用生物制剂强克穴位注射治疗强直性脊柱炎患者临床效果显著,优于常规皮下注射,安全性和耐受性好,为中西医结合治疗提供临床经验。

新型重组人肿瘤坏死因子治疗非小细胞肺癌的多中心Ⅱ期临床随机试验

目的 观察比较国产新型重组人肿瘤坏死因子 (nrhTNF)加化疗和单纯化疗治疗非小细胞肺癌(NSCLC)的临床疗效和不良反应。方法 采用多中心、随机对照试验将 90例NSCLC患者随机分为试验组和对照组 ,两组各 45例患者。试验组在化疗的同时 ,分别在第 1～ 7天 ,第 11～ 17天肌肉注射nrhTNF 4×10 6U/m2 ,2 1天为一周 ,连用二个周期。对照组仅给予化疗 ,2 1天为一周期 ,连用二个周期。试验结束后比较试验组和对照组的有效率和不良反应。结果 试验组和对照组各有 3例患者因依从性原因出组 ,各有 42例可供临床疗效分析和不良反应分析。试验组有效率为 47.62 % ( 2 0 /4 2 ) ,对照组为 19.0 5 % ( 8/4 2 ) (P =0 .0 0 2 )。试验组治疗后KPS评分为 85 .0 2± 10 .74,对照组为 81.3 5± 9.63 (P =0 .0 3 8)。试验组和对照组Ⅲ+Ⅳ度不良反应无显著差异 (P >0 .0 5 )。与nrhTNF有关的不良反应主要有轻度发热、感冒样症状 ,注射局部疼痛 ,注射局部红肿硬结 ,均不需作特殊处理 ,治疗结束后均能自行消失。结论 国产nrhTNF联合化疗药物治疗NSCLC能显著提高化疗的有效率 ,改善患者的生活质量。nrhTNF临床应用安全、有效 ,不良反应轻微 。

应用基因工程方法制备新型重组人肿瘤坏死因子-α

目的 应用基因工程技术 ,制备一种新型的重组人肿瘤坏死因子 α (novelrecombinanthumantumornecrosisfactor α ,nrhTNF α) ,并对其生物学活性、理化性质进行鉴定 ,为进入临床前研究提供基础。方法 应用PCR技术 ,将hTNF α基因的 5′端 17个氨基酸的编码序列删除 ,基因中Pro8Ser9Asp10 的编码序列用Arg Lys Arg的编码序列取代 ,同时Leu157的密码子被Phe的密码子所取代。将hTNF α突变基因 ,插入原核高效表达载体pBV2 2 0中 ,构建高表达工程菌株。纯化表达产物 ,对连续 3批制备的新型rhTNF α,按人用《重组DNA制品质量控制要点》检定要求进行鉴定。结果DNA序列分析和蛋白质N末端、C末端部分氨基酸序列分析表明 ,nrhTNF α与天然的hTNF α相比较 ,N末端缺失了 7个氨基酸 ,13位氨基酸为Arg Lys Arg ,其后为天然hTNF α 11位以后的氨基酸。 15 7位Leu的密码子被Phe的密码子所取代。产物表达量占菌体蛋白的 6 7.4 %。经 (NH4) 2 SO4沉淀、Q SepharoseF .F .及S SepharoseF .F .柱层析分离纯化后 ,产品的纯度达 99% ,比活性达 1× 10 9IU/mg蛋白。结论成功地制备了nrhTNF ,对连续 3批制备的nrhTNF α按人用《重组DNA制品质量控制要点》检定要求进行鉴定 。

重组改构人肿瘤坏死因子对小细胞肺癌化疗的干预

目的：对比研究国产新药重组改构人肿瘤坏死因子（rmhTNF）加化学治疗和单纯化学治疗人小细胞肺癌（SCLC）的临床疗效和安全性。方法：采用随机对照试验，试验组15例．对照组17例。对照组仅给予EP方案化疗，而试验组在EP方案化疗的同时，分别在第1～7天，第11～17天肌内注射rmh．TNF4×10^6U·m^-2，两组均以21d为一周期。连用两个周期。结果：试验组治疗有效率为80．0％（12／15），对照组为58．8％（10／17），疗后KPS评分两组分别为（78.2±9．7）和（72．1±9．5），试验组有效率和治疗后KPS评分改善情况均显著高于对照组（P〈0．05）。试验组和对照组均未见有严重的不良反应发生。结论：新型基因工程药物rmhTNF联合化疗治疗人SCLC的疗效显著优于单纯化疗，能明显改善SCLC患者的生活质量，且临床应用安全。

注射用重组改构人肿瘤坏死因子联合化疗药物治疗非小细胞肺癌的多中心Ⅲ期临床试验

目的 观察并比较国产注射用重组改构人肿瘤坏死因子 (rmhTNF)加化疗药物和单纯化疗治疗人非小细胞肺癌的临床疗效和不良反应。方法 采用多中心、随机对照试验将 2 0 0例人非小细胞肺癌患者随机分为试验组和对照组 ,试验组 15 0例 ,对照组 5 0例。对照组仅给予化疗 ,而试验组在化疗的同时 ,分别在第 1～ 7天 ,第 11～ 17天肌肉注射rmhTNF 4× 10 6U /m2 ,两组均以 2 1天为一周期 ,连用两个周期。试验结束后比较试验组和对照组的有效率和不良反应。结果 试验组有 5例 ,对照组有 3例患者因为依从性原因出组 ,其余患者可供临床疗效和不良反应分析。试验组有效率为 46.90 % ( 68/ 14 5 ) ,对照组为 17.0 2 % ( 8/ 47)(P =0 .0 0 1)。试验组治疗后KPS评分为 86.0 2± 9.74,对照组为 80 .14± 9.10 (P =0 .0 2 5 )。试验组和对照组Ⅲ +Ⅳ度不良反应发生率无显著性差异 (P >0 .0 5 )。与rmhTNF有关的不良反应主要有轻度发热、感冒样症状、注射局部疼痛、注射局部红肿硬结 ,均不需作特殊处理 ,治疗结束后均能自行消失。试验组和对照组均未见有严重肝肾功能、心电图异常 ,以及低血压等不良反应发生。结论 rmhTNF联合化疗药物治疗人非小细胞肺癌的疗效显著优于单纯化疗 ,rmhTNF能明显提高化疗药物的敏感性 ,改?

转基因蓝藻制备α型重组人肿瘤坏死因子衍生物

应用ＤＮＡ重组技术将ａ型重组人肿瘤坏死因子衍生物（ｒｅｃｏｍｂｉｎａｎｔｈｕｍａｎｔｕｍｏｒｎｅｃｒｏｓｉｓｆａｃｔｏｒａ，ｒｈＴＮＦａ）ｃＤＮＡ插到穿梭质粒ＰＤＣ－８上，构建成穿梭表达载体ＰＤＣ－ＴＮＦ，转入鱼腥藻ＰＣＣ－７１２２０中进行表达。