Development of novel-nanobody-based lateral-flow immunochromatographic strip test for rapid detection of recombinant human interferon a2b

Recombinant human interferon a2b(rhIFNa2b)is widely used as an antiviral therapy agent for the treatment of hepatitis B and hepatitis C.The current identification test for rhIFNa2b is complex.In this study,an anti-rhIFNa2b nanobody was discovered and used for the development of a rapid lateral flow strip for the identification of rhIFNa2b.RhIFNa2b was used to immunize an alpaca,which established a phage nanobody library.After five steps of enrichment,the nanobody I22,which specifically bound rhIFNa2b,was isolated and inserted into the prokaryotic expression vector pET28a.After subsequent purification,the physicochemical properties of the nanobody were determined.A semiquantitative detection and rapid identification assay of rhIFNa2b was developed using this novel nanobody.To develop a rapid test,the nanobody I22 was coupled with a colloidal gold to produce lateral-flow test strips.The developed rhIFNa2b detection assay had a limit of detection of 1 mg/mL.The isolation of I22 and successful construction of a lateral-flow immunochromatographic test strip demonstrated the feasibility of performing ligand-binding assays on a lateral-flow test strip using recombinant protein products.The principle of this novel assay is generally applicable for the rapid testing of other commercial products,with a great potential for routine use in detecting counterfeit recombinant protein products.

Pegylated interferon α-2b up-regulates specific CD8+ T cells in patients with chronic hepatitis B

AIM:To investigate the effect of pegylated interferon (IFN) α-2b on specific CD8+ T lymphocytes in patients with chronic hepatitis B (CHB). METHODS:Twenty-one patients with CHB were treated with pegylated IFN α-2b. Periphery blood mononuclear cells were isolated from fresh heparinized blood by Ficoll-Hypaque density gradient centrifugation (density:1.077 g/L,Pharmingen) at weeks 0,4,8,12,and 24,respectively. Frequency of circulating hepatitis B virus (HBV) epitope-specific CD8 T cells was detected by flow cytometry. Cytokines were detected by cytometric bead assay. RESULTS:The frequency of circulating HBV core or env-specific CD8 T cells was higher (P < 0.05),the number of HBV core specific CD8 T cells was greater at week 24 (P < 0.05),the level of Th1-type cytokines [interleukin (IL)-12,tumor necrosis factor-α,and IFN-γ] was higher,while that of Th2-type cytokines (IL-4,IL-6,and IL-10) was lower in responders than in nonresponders (P < 0.05) after pegylated IFN α-2b treatment. The IL-6 level was correlated with HBV DNA (r = 0.597,P = 0.04),while the inducible protein-10 (IP-10) level was correlated with serum alanine aminotransferase (ALT) (r = 0.545,P = 0.005). The IP-10 level at week 8 after pegylated IFN α-2b treatment could predict the normalization of ALT in CHB patients (positive predict value = 56%,negative predict value = 92%). CONCLUSION:Pegylated IFN α-2b can enhance the immune response of CHB patients by increasing the frequency of HBV specific CD8+ T cells and regulating the Th1/Th2 cytokines.

5-氨基酮戊酸光动力疗法联合人干扰素α-2β治疗尖锐湿疣的效果分析

目的探讨5-氨基酮戊酸光动力疗法(ALA-PDT)联合人干扰素α-2β治疗尖锐湿疣(CA)的效果及对血清T细胞亚群和趋化因子配体19(CCL19)、基质金属蛋白酶-3(MMP-3)水平的影响。方法选择86例CA患者为研究对象,根据随机数字表法将CA患者分为对照组(ALA-PDT治疗)和观察组(ALA-PDT联合人干扰素α-2β治疗),每组43例。比较2组患者临床疗效以及治疗前后血清T细胞亚群、CCL19、MMP-3水平变化情况,并记录治疗期间不良反应发生情况。随访6个月,记录复发疣体数量和复发率。结果观察组治疗总有效率高于对照组,差异有统计学意义(P<0.05);治疗后,观察组CD4^(+)、CD8^(+)、CD4^(+)/CD8^(+)较对照组升高,差异有统计学意义(P<0.05)。与对照组比较,观察组治疗后血清CCL19升高,MMP-3下降,差异有统计学意义(P<0.05)。2组不良反应发生率比较,差异无统计学意义(P>0.05)。对照组复发率、平均复发疣体数量高于观察组,差异有统计学意义(P<0.05)。结论ALA-PDT联合人干扰素α-2β治疗尖锐湿疣效果显著,可调节血清T细胞亚群水平,降低MMP-3水平,提升CCL19水平,且安全性较好。

Expression and Significance of SHP-2 in Human Papillomavirus Infected Cervical Cancer

This study investigated the expression and prognostic value of SHP-2 in cervical cancer caused by human papillomavirus (HPV) infection. Forty-five specimens from patients with cervical cancer (stageⅠ-Ⅲ), 32 specimens from patients with cervical intraepithelial neoplasia (CIN) (Ⅰ, Ⅱ) and 20 normal cervical samples from patients with hysteromyoma were collected in Department of Pathology for comparison. The expression levels of SHP-2 and IFN-β proteins were detected by using immunohistochemistry. The mRNA expression level of SHP-2 was detected by using quantitative real-time polymerase chain reaction (PCR). HPVs were detected by HPV GenoArray Test. The Spearman correlation was used to compare the expression level of SHP-2 in HPV infected cervical cancer vs non-HPV infected normal cervix. The level of SHP-2 protein expression in the cancer tissues (88.8%) was significantly higher than in CIN tissues (62.5%) and normal cervixes (45%) (P<0.05 and P<0.05, respectively). The SHP-2 mRNA levels in the cancer tissues were upregulated as compared with those in the normal cervixes (P<0.05). Twenty-one (46.7%) cervical cancers, 25 (78.1%) CINs and 17 (85%) normal cervixes showed IFN-β positive staining in cytoplasm. There was statistically significant difference in the expression rate of IFN-β between cervical cancer and normal cervix (χ2=8.378, P<0.05) as well as between cervical cancer and CIN (χ2=7.695, P<0.05). HPV16/18 infections could be found in normal cervixs (15%), CINs (68.7%) and cervical cancers (84.4%). There was a correlation between HPV infection and SHP-2 expression in cervical cancer (rs=0.653, P<0.05). SHP-2 may be a useful prognostic and diagnostic indicator for HPV infected cervical cancer. In cervical cancers, SHP-2 mRNA and protein overexpression was associated with IFN-β lower-expression.

Expression of Human Interferon α 2b Gene in Ginseng Cells

The human interferon α 2b（hIFN-α2b） gene was cloned into binary vector pBI121 to obtain plant expression vector pBIFN. The recombinant plasmid pBIFN was transferred into Agrobacterium tumefaciens strain LBA4404. Then the hIFN-α2b gene was introduced into ginseng callus cells via Agrobacterium-mediated transformation and the ginseng cell line carrying hIFN-α2b gene was selected on G418-containing medium. The presence of target gene in transformed cells was confirmed by PCR and RT-PCR. The results indicate that hIFN-α2b gene has been integrated into the ginseng cells＇ genome, with transcription products, hIFN-α2b expressed by the transgenic ginseng cells was detected by Western blot. It was shown that a specific protein band at 19000 could be observed. Cytopathic effect（CPE） inhibition assay using the W1SH-VSV system shows that the mean antiviral activity of expressed hlFN-a2α was 6.0× 10^4 IU/mL.

Study on pharmacodynamics of recombinant interferon α-2b suppository

Objective To investigate the antiviral activity of recombinant interferonα-2b suppository(IFNα-2b)in vivo and in vitro.Methods The cytopathic-effect inhibition assay was applied in this study to investigate the antiviral activity of this drug as well as yingtelong and axiluowei as positive control.The guinea pig model of vaginitis and skin infection caused by HSV-2 infection were established,treated with IFNα-2b suppository at dosages of 60000、180000、540000 IU,using IFNα-2b injection 180000 IU·kg-1 as controls.Score the pathological changes of appearance and skin,the virus activities of vaginal secretion and tissue sections of viginae were assayed after treatment.Results The TD50 of IFN α-2b and yingtelong for Vero cells was(>100)μg·mL-1 and(>100000)IU·mL-1,respectively.The IC50 of IFN α-2b and yingtelong and axiluowei for Herpes virus type 1 was(0.29±0.08)μg·mL-1 and(185.0±28.8)IU·mL-1 and(0.19±0.03)μg·mL-1,respectively.The mean scores for vaginal and skin lesion of the treated groups were lower than those of untreated group.Among these concentrations,the IFNα-2b suppository of 540000 IU·kg-1 group.Showed highest anti-viral activity.The virus activity in vaginal secretion of treated group was lower than that of untreated group too(P<0.01 or P<0.05).Tissue sections of viginae after treatment with IFNα-2b suppository showed significantly therapeutical effects on the degrees of vaginal lesion.At the same dosage,The anti-HSV activity of IFNα-2b suppository was also compared with IFNα-2b injection,the results showed that the activity of suppository of 540000 IU·kg-1 group was similar to that of the injection.Conclusions The IFNα-2b suppository has anti-viruses function both in vivo and in vitro.

重组干扰素α-2b联合CO_(2)激光气化治疗宫颈低级别上皮内病变伴HR-HPV感染患者的临床效果及对HPV转阴率的影响

目的分析重组干扰素α-2b联合CO_(2)激光气化治疗宫颈低级别上皮内病变伴高危型人乳头瘤病毒(HR-HPV)感染的临床效果。方法选取宫颈低级别上皮内病变伴HR-HPV感染患者80例,采用随机数表法分为对照组及研究组,每组40例。对照组采用重组干扰素α-2b治疗,研究组采用重组干扰素α-2b联合CO_(2)激光气化治疗。比较两组患者的治疗效果。结果研究组治疗总有效率为90.00%,高于对照组的72.50%(P<0.05)。研究组治疗3、6个月的HPV转阴率均高于对照组(P<0.05)。两组不良反应总发生率比较,差异无统计学意义(P>0.05)。结论采用重组干扰素α-2b联合CO_(2)激光气化治疗宫颈低级别上皮内病变伴HR-HPV感染患者,可提高疗效及HPV转阴率。

Effects of interferon α-2b on liver function, complement level and oxidative stress in patients with hepatitis B

Objective:To observe the effect of interferonα-2b treatment on liver function,liver fibrosis,complement protein and oxidative stress in patients with hepatitis B.Methods:A total of 100 patients with hepatitis B in our hospital were randomly divided into the control group and the observation group,with 50 cases in each group.After admission,patients in the control group were treated with entecavir,while patients in the observation group were treated with interferonα-2b combined with entecavir.The levels of serum total bilirubin(TBil),aspartate aminotransferase(AST),alanine aminotransferase(ALT),type III procollagen(PCIII),type IV collagen(CIV),complement C3 protein(C3),complement C4 protein(C4),malondialdehyde(MDA),superoxide dismutase(SOD)and nitric oxide(NO)were compared between the two groups before and after treatment.Results:After treatment,the levels of TBil,AST,ALT,PCIII,CIV,MDA and NO in serum of patients with hepatitis B in both groups were significantly lower than those before treatment,and the levels of C3,C4 and SOD were significantly higher than those before treatment(P<0.05).After treatment,the levels of TBil,AST,ALT,PC III,C IV,MDA and NO in serum of patients in the observation group were significantly lower than those in the control group,while the levels of C3,C4 and SOD in serum of patients in the observation group were significantly higher than those in the control group(P<0.05).Conclusions:The combination of interferonα-2b and entecavir has a good curative effect on hepatitis B.It can significantly improve the liver function and immune function of patients,delay the process of liver fibrosis and reduce oxidative stress injury.It is worthy of clinical promotion.

SYNERGIC CYTOTOXICITY TO GASTRIC CANCER CELLS BY COMBINED USE OF TRICHOSANTHIN ANDRECOMBINANT INTERFERON α-2B

Objective To investigate a new approach of the combined use of trichosanthin (TCS) andrecombinant interferon alpha - 2b (rIFN α- 2b) against digestive system cancer cells. Methods Detect separatelythe cytotoxicity of TCS, rIFN α- 2b and their combination against digestive system cancer cell SGC- 7901.Results In the experiment in vitro, TCS, rIFN α- 2b both had direct, dose dependent cytotoxicity againstSGC - 7901. Their combined use demonstrated a toxicity signijicantly higher than that of the two drugs used alone,showing a signilicant synergic effect. This synergic cytotoxicity was confirmed in the animal experiment.Conclusion Combined use of TCS and rIFN α - 2b decreases the therapeutic dose of TCS and its toxic adverseellect, and this synergic effect is favorable to the clinical use of TCS protein against gastric cancer.

Effects of anti-HPV bioprotein dressing combined with interferon α-2b therapy on the malignant molecule expression in patients with CINⅢ complicated by high-risk HPV positive

Objective: To study the effects of anti-HPV bioprotein dressing combined with interferon α-2b therapy on the malignant molecule expression in patients with cervical intraepithelial neoplasia (CIN) Ⅲ complicated by high-risk HPV positive. Methods: Patients who were diagnosed with CINⅢ and high-risk HPV positive and underwent conization in the 3201 Hospital Affiliated to Xi'an Jiaotong University between June 2014 and February 2017 were selected and randomly divided into the observation group who received preoperative anti-HPV bioprotein dressing combined with interferon α-2b therapy and the control group who received no special treatment. CIN lesion was collected to determine the expression of pro-proliferation molecules, pro-apoptosis molecules and epithelial-mesenchymal transition molecules. Results: Rsf1, Piwil2, TOPK, p38MAPK, ERK, Snail, Twist, N-cadherin and Vimentin mRNA expression in cervical intraepithelial neoplasia lesions of observation group were greatly lower than those of control group whereas LRIG3, SARI, IEX-1, FHIT and E-cadherin mRNA expression were greatly higher than those of control group. Conclusion: Anti-HPV bioprotein dressing combined with interferon α-2b therapy can inhibit the proliferation and invasive growth of tumor cells in patients with CINⅢ complicated by high-risk HPV positive.

重组人IL-2在治疗外阴、阴道尖锐湿疣中的应用

目的 应用重组人IL 2治疗顽固性外阴、阴道尖锐湿疣。方法 局部病灶药物腐蚀、手术切除 ,在赘生物基底部注射干扰素 10 0万U加用重组人IL 2 10万U。结果 对久治不愈、反复发作的 2 0例病人 ,病灶很快被控制并治愈 ;并发的其他性传播疾病均得以控制。结论 IL 2与α 干扰素协同作用可控制HPV病毒感染。

IL-23在单纯疱疹病毒Ⅱ型致病中的作用

目的探讨IL-23在单纯疱疹病毒Ⅱ型(HSV-Ⅱ)致病机制中的作用。方法应用ELISA法检测HSV病毒感染复发患者外周血IL-23、IL-12、IFN-γ、IL-14、IL-10水平,以及细胞培养液中IFN-γ水平,流式细胞仪检测记忆性CD4+T细胞表达IFN-γ的水平,同时设立健康对照组进行比较。结果生殖器疱疹复发患者(RGH)组血清IL-23、IL-12、IFN-γ水平明显低于健康对照组,IL-14、IL-10水平明显高于健康对照组,差异有统计学意义(P<0.01);IL-23剂量依赖性诱导患者单个核细胞(PBMC)产生IFN-γ,并刺激记忆性CD4+T细胞表达IFN-γ。结论 IL-23等Th1型细胞因子在RGH患者体内水平低下,Th1/Th2平衡失调,机体不能有效抑制病毒,是导致病情反复的重要原因;IL-23可能在体内同样刺激T细胞产生IFN-γ,发挥抗病毒效力。

清热解毒方联合干扰素a-2b治疗宫颈高危型人乳头瘤病毒持续感染随机平行对照研究

[目的]观察清热解毒方联合干扰素a-2b治疗宫颈高危型人乳头瘤病毒(HR-HPV)持续感染疗效。[方法]使用随机平行对照方法,将68例住院患者按随机数字表法分为两组。对照组72例干扰素a-2b,隔日一粒,睡前放置于阴道后穹隆接近宫颈口处。治疗组142例清热解毒方(山药、车前子、苍术、鸡冠花、猪苓各15g,白花蛇舌草、生薏苡仁、蒲公英各30g,柴胡、芡实各10g,炒白术20g),1剂/d,水煎300mL,早晚口服,月经干净后服用,经期停药。西药治疗同对照组。连续治疗30d为1疗程。观测临床症状、血液学检查、HPV复查、不良反应。连续治疗3疗程,判定疗效。[结果]治疗组痊愈93例,有效34例,无效15例,总有效率89.44%;对照组痊愈21例,有效39例,无效12例,总有效率83.33%。转阴93例,转阴率65.49%。临床疗效治疗组优于对照组(P<0.05)。治疗组HR-HPV病毒转阴率优于对照组(P<0.01)。[结论]清热解毒方联合干扰素a-2b治疗HR-HPV持续感染效果显著,值得推广使用。

Lys-2-rhTNFα单用或联合其它细胞因子抗肿瘤作用的研究

研究了 L ys- 2 - rh TNFα(1)单用或联合 1 2 5Ser- rh IL - 2 (2 )和 /或 rh INFα- 2 a(3)的体内外抗肿瘤作用。实验结果表明 1对人结肠癌细胞株 (M76 0 9)、小鼠黑色素瘤细胞株 (B16 )、小鼠白血病细胞株 (Yac- 1)均有抑制细胞增殖的作用。 1合用 2及 3较它们各自单用及任意两者合用的细胞毒作用明显增强 (P<0 .0 1)。 1与 2、3联合用药组较它们各自单独用药对小鼠结肠癌 Colon2 6细胞移植性肿瘤的抑瘤作用明显提高 (P<0 .0 5 )。

酵母双杂交技术筛选宫颈癌HeLa细胞cDNA文库中FAM92A1-289关联蛋白

目的应用酵母双杂交技术从宫颈癌He La细胞c DNA文库中筛选FAM92A1-289关联蛋白。方法构建酵母双杂交p GBKT7-FAM92A1-289诱饵载体,转化至酵母AH109感受态细胞中。利用Clontech GAL4酵母双杂交系统筛选He La细胞c DNA文库中与FAM92A1-289相互作用的蛋白质,用营养缺陷型培养基和X-a-Gal双重筛选实验进行筛选,对筛选结果进行生物信息学分析,对克隆重复率较高的蛋白进行回转验证,将β-半乳糖苷酶活性阳性的克隆进行测序并分析。结果成功构建酵母双杂交p GBKT7-FAM92A1-289诱饵载体,可在酵母细胞中正常表达FAM92A1-289,且对酵母细胞无毒性,不存在自激活现象。筛选出在SD/-Ade/-His/-Leu/-Trp四缺培养基及含X-a-Gal的SD/-Ade/-His/-Leu/-Trp四缺培养基上均能生长且β-半乳糖苷酶活性阳性的克隆9个。经生物信息学分析发现4种蛋白重复率较高,即增殖细胞核抗原(PCNA)、半乳糖凝集素1(Galectin-1)、内质网高尔基体中间室标记物53(ERGIC-53)、重组人BCL2相关永生基因1(BAG1),并均与FAM92A1-289存在相互作用。结论利用酵母双杂交技术在Hela细胞c DNA文库中成功筛选出与FAM92A1-289相互作用的蛋白,为进一步研究FAM92A1-289的功能提供了新线索。

干扰素联合白介素-2治疗宫颈高危型HPV感染的临床研究

目的探讨干扰素联合白介素-2治疗宫颈高危型人乳头瘤病毒（hr—HPV）感染的临床疗效。方法将34例宫颈高危型HPV感染患者随机分为3组，治疗A组12例予干扰素联合白介素-2治疗，治疗B组11例予干扰素治疗，对照组11例不予治疗；观察治疗后患者的HPV转阴率、不良反应。结果治疗A组、治疗B组、对照组hr-HPV的转阴率分剐为91．7％、72．7％、9．1％，治疗A组、治疗B组与对照组比较，差异有显著性（P〈0．01）；治疗A组转阴率高于治疗B组（P〈0.05）。治疗A组、B组的不良反应发生率为25％、27．3％。结论干扰素联合白介素-2治疗宫颈高危型HPV感染疗效较显著。不良反应少，远期疗效和不良反应仍有待进一步研究。

β防御素-2和γ干扰素在尖锐湿疣皮损中表达的研究

目的:研究和探讨β防御素-2(HBD-2)和γ干扰素(IFN-γ)在尖锐湿疣发病和预后中的作用。方法:用免疫组化法检测HBD-2和IFN-γ在25例尖锐湿疣(CA)(初发患者)皮损、20例寻常性银屑病皮损以及25例健康人皮肤石蜡切片中的表达。SPSS16.0统计软件进行数据分析,组间行Wilcoxon秩和检验,并进行相关性分析。结果:HBD-2、IFN-γ在尖锐湿疣皮损的表达主要见于基底层,HBD-2、IFN-γ水平明显低于银屑病阳性对照组(Z=-7.174,-7.230;P<0.O1),HBD-2的水平较正常皮肤为高表达(Z=-5.147,P<0.01),IFN-γ的水平较正常皮肤为低表达(Z=-6.311,P<0.05),且HBD和IFN无相关性(r=0.123,P=0.467>0.01)。结论:推测HBD-2、IFN-γ可能通过不同的途径共同参与了尖锐湿疣的免疫反应过程并发挥了一定的作用。

联合应用干扰素α-2b及选择性环氧化酶2抑制剂对肝癌细胞抑制作用的研究

目的观察干扰素α-2b(IFN-α-2b),选择性环氧化酶2(COX-2)抑制剂非甾体类消炎药塞来昔布单用以及两者联合应用时,对人肝癌细胞株HepG2的生长抑制作用及同时检测药物作用后COX-2和血管内皮生长因子(VEGF)及Bcl-2表达的情况,探讨药物作用的机制。方法 HepG2细胞根据所加药物不同分为不同浓度的IFN-α-2b组(1250、2500、5000、10 000、20 000、40 000 U/mL)、塞来昔布组(25、50、100、200μmol/L)、联合用药组(IFN-α-2b 5000 U/mL+塞来昔布50μmol/L、IFN-α-2b 5000 U/mL+选择性COX-2 100μmol/L)。MTT法检测不同时间(24、48 h)各组细胞增殖抑制率,流式细胞术检测细胞凋亡率,Western blot检测用药前后COX-2、VEGF、Bcl-2蛋白在HepG2细胞中的表达变化。结果不同浓度的塞来昔布和干扰素对HepG2细胞均有抑制作用,且联合效果明显优于单用,各组与对照组差异有统计学意义(P<0.05);流式细胞术分析:塞来昔布50μmol/L组、塞来昔布100μmol/L组、IFN-α-2b 5000 U/mL组、IFN-α-2b 5000 U/mL+塞来昔布50μmol/L组、IFN-α-2b 5000 U/mL+塞来昔布100μmol/L组细胞凋亡率分别为(14.93±0.79)%、(25.43±0.89)%、(20.52±1.46)%、(27.12±3.34)%、(48.17±2.04)%,与阴性对照组(8.73±0.83)%比较差异均有统计学意义(P<0.05);塞来昔布单用及联合IFN-α-2b作用48 h后,各组COX-2、VEGF、Bcl-2蛋白的表达下调,呈剂量依赖性,联合用药组较单药组作用明显。结论干扰素α-2b和塞来昔布均有抑制肝癌细胞HepG2增殖的作用,同时对细胞具有凋亡诱导作用,亦能抑制细胞中COX-2、VEGF、Bcl-2的表达。上述抑制作用随药物浓度的增加、作用时间的延长而增强,联合作用更强。