阿尔茨海默病病变相关脑区Pgc-1alpha敲除小鼠模型的构建

目的:构建在阿尔茨海默病(Alzheimer′s disease,AD)病变相关脑区过氧化物酶体增殖物激活受体γ辅激活因子-1α(peroxisome proliferator-activated receptorγcoactivator-1 alpha,Pgc-1alpha)敲除小鼠。方法:引入Pgc-1alpha条件性敲除杂合子小鼠(Pgc-1alphafl/+),通过自交获得Pgc-1alpha条件性敲除纯合子小鼠(Pgc-1alphafl/fl)。将Pgc-1alphafl/fl纯合子小鼠和在AD病变脑区(皮层、海马)特异性表达Cre重组酶的Cre工具鼠(Calb1-Cre)杂交,提取子代转基因小鼠基因组DNA,行PCR鉴定,确定其基因型;采用蛋白免疫印迹技术检测转基因小鼠与野生型小鼠脑区及肾脏PGC-1α蛋白表达。结果:双重PCR鉴定结果显示,同时扩增出400 bp及444 bp条带的小鼠为AD病变脑区Pgc-1alpha敲除纯合子小鼠(Pgc-1alphafl/fl::Calb1-Cre,Pgc-1alpha-/-)。蛋白免疫印迹结果显示,与野生型小鼠相比,条件性敲除小鼠脑区PGC-1α蛋白表达明显减少(P<0.05)。结论:成功构建在AD病变相关脑区Pgc-1alpha敲除小鼠。

Acute Toxicity of Recombinant Porcine Interferon-alpha

To observe the acute toxicity of recombinant porcine interferen-alpha （IFN-alpha） in mice and thus provide a basis for the clinical safety. [Method] According to the principles of acute toxicity, all the mice were divided into two major groups （intraperitoneally injected group and intramuscularly injected group） respectively at high dose, moderate dose and low dose. And the normal control group was also set up. Within 14 d after administration, the behavior of mouse and the degree of toxicity were continuously observed. The hematological indexes and biochemical indexes of blood were detected to obtain the preliminary toxicity data of the recombinant porcine IFN-alpha. And at the end of the experiment, mice were sacrificed for autopsy. [ Result] There was not significant difference in external performance, behavioral characteristics, body temperature, weight, pathological anatomy of visceral organs, hematological indexes and biochemical indexes between the experimental groups and the control group. [ Conclusion] The highest dose of porcine interferon （5.0 x 10s IU per mouse） in this experiment or the dose lower than this dosage should not have significant toxic effects on mice, and the recombinant porcine IFN-alpha is safe in clinical application.

聚乙二醇干扰素α-2b联合富马酸替诺福韦二吡呋酯片对乙型肝炎患者的治疗效果

目的探究乙型肝炎患者使用聚乙二醇干扰素α-2b、富马酸替诺福韦二吡呋酯片联合治疗的效果。方法选取2022年1—12月在莆田学院附属医院感染性疾病科治疗的乙型肝炎患者中200例为研究对象,随机分为对照组(100例,服用富马酸替诺福韦二吡呋酯片治疗)和观察组(100例,采用聚乙二醇干扰素α-2b联合富马酸替诺福韦二吡呋酯片治疗)。对比治疗前后两组肝功能、乙型肝炎病毒转阴率和炎症因子水平。结果检测两组肝功能状况,治疗后24周观察组天冬氨酸氨基转移酶(AST)、丙氨酸氨基转移酶(ALT)、胆红素水平均低于对照组(均P<0.05)。治疗后6、12、18、24周观察组乙型肝炎病毒转阴率均高于对照组(均P<0.05)。治疗后24周,观察组白细胞介素-4、生长分化因子、干扰素诱导蛋白-10水平均低于对照组(均P<0.05)。结论乙型肝炎患者使用聚乙二醇干扰素α-2b、富马酸替诺福韦二吡呋酯片联合治疗,可以改善患者肝功能、提升乙型肝炎病毒转阴率,降低炎症因子水平,促进患者恢复。

聚乙二醇干扰素α-2b联合替诺福韦对乙型肝炎患者肝功能及安全性的影响

目的:探讨聚乙二醇干扰素α-2b联合替诺福韦对乙型肝炎患者肝功能及安全性的影响。方法:选取2018年10月—2020年8月南阳医学高等专科学校第一附属医院收治的96例乙型肝炎患者作为研究对象,采用乱数表法分为A组和B组,每组各48例。A组给予替诺福韦酯片治疗,B组在A组基础上加用聚乙二醇干扰素α-2b治疗。比较两组患者治疗前、后总胆红素(TBIL)、白蛋白(ALB)、天门冬氨酸氨基转移酶(AST)、谷丙转氨酶(ALT)、干扰素-γ(IFN-γ)、白介素-10(IL-10)、白介素-4(IL-4)和白介素-2(IL-2)水平。比较两组患者乙型肝炎病毒(HBV)-DNA转阴率、乙型肝炎e抗原(HBeAg)转阴率、转换率和ALT复常率。统计两组患者治疗有效率和不良反应发生率。结果:治疗后,B组总胆红素(TBIL)、天门冬氨酸氨基转移酶(AST)和谷丙转氨酶(ALT)水平均低于A组,两组患者白蛋白(ALB)均升高且B组升高幅度大于A组,差异有统计学意义(t=15.629、27.253、30.580、11.761,P<0.05);治疗后,两组患者酶联免疫吸附测定干扰素-γ(IFN-γ)和白介素-2(IL-2)均升高,且B组升高幅度大于A组,白介素-10(IL-10)和白介素-4(IL-4)均降低,且B组降低幅度大于A组,差异有统计学意义(t=20.777、7.614、24.624、1.609,P<0.05);B组HBV-DNA转阴率、ALT复常率、乙型肝炎e抗原(HBeAg)转阴率、HBeAg转换率均高于A组,差异有统计学意义(χ^(2)=4.381、4.800、4.019、4.909,P<0.05);B组治疗总有效率高于A组,差异有统计学意义(χ^(2)=4.360,P<0.05);两组患者不良反应发生率比较,差异无统计学意义(χ^(2)=0.079,P>0.05)。结论:聚乙二醇干扰素α-2b联合替诺福韦可有效改善患者肝功能,调节免疫功能且安全性较高。

Mindin蛋白在经聚乙二醇干扰素α-2b治疗的慢性乙型肝炎中的动态变化及意义

目的 分析聚乙二醇干扰素α-2b(PEG-IFNα-2b)治疗慢性乙型肝炎(CHB)过程中Mindin蛋白的变化以及作用。方法 选取2018年1月—2019年12月于西安交通大学第二附属医院行PEG-IFNα-2b治疗的CHB患者29例,按照临床结局分为治愈组(n=17)与未治愈组(n=12)。分别采集治愈组和未治愈组基线、12周和24周的外周血样本,测量血常规、肝功能、乙型肝炎标志物定量和Mindin蛋白含量。分析比较各时间点HBsAg、ALT、AST及Minidn蛋白水平的组间差异。符合正态分布的计量资料两组间比较采用成组t检验;非正态分布的计量资料两组间比较采用Mann-Whitney U检验。采用Spearman相关性分析法对Mindin蛋白与HBsAg、ALT、AST的相关性进行分析。多元线性回归分析探讨HBsAg、ALT水平对Mindin蛋白的影响。结果 基线资料分析发现,未治愈组和治愈组HBsAg、抗-HBe、Alb和白/球比值(A/G)水平两组间比较差异均有统计学意义(P值均<0.05)。治愈组Mindin蛋白水平呈现持续上升的趋势,24周时Mindin蛋白水平显著高于基线(P<0.05)。24周时治愈组Mindin蛋白水平显著高于未治愈组(P=0.019)。治愈组HBsAg水平均显著低于未治愈组,且组内各时间点与基线比较差异均具有统计学意义(P值均<0.05)。此外,治愈组ALT和AST的变化均呈现先升高后降低的趋势,12周的表达水平均显著高于基线(P值均<0.05)。未治愈组24周ALT和AST水平均显著高治愈组(P值均<0.05)。未治愈组12周时Mindin蛋白水平与ALT呈现出较强的直线相关性(r=0.760 8,P<0.05),进一步的多元线性回归分析同样证明两者间存在线性关系(偏回归系数为1.571,P=0.019)。结论 PEG-IFNα-2b抗病毒治疗24周时的Mindin蛋白水平在治愈组和未治愈组间存在明显差异。提示通过检测Mindin蛋白的动态变化可以更好地预测慢性乙型肝炎的治疗结局,为临床提供参考。

Relationship between HBV genotypes and anti-viral therapeutic efficacy of interferon-alpha

BACKGROUND: Much evidence demonstrates that the genotypes of hepatitis B virus (HBV) present differences in pathogenicity and outcomes owing to differences in genetic structure. This study aimed to investigate the influences of HBV genotypes on the anti-viral therapeutic efficacy of interferon-alpha (IFN-alpha) in chronic hepatitis B patients, and to determine the relationship between HBV genotypes and levels of viral replication or gene variations. METHODS: The chronic hepatitis B patients who were treated with IFN-alpha were selected randomly. Anti-viral therapeutic efficacy was monitored in these patients. The HBV genotypes were detected by PCR microplate hybridization ELISA. The levels of serum HBV-DNA were determined by fluorescence quantitative PCR. HBV gene variation at pre-C and basic core promoter (BCP) regions were assayed by gene chip technology. RESULTS: Genotypes B and C were predominant in 94 chronic hepatitis B patients. A, E and F genotypes were not found in these patients. The HBV-DNA levels of genotype C and mixed genotypes were significantly higher than those of genotype B. The response to IFN-alpha in patients with genotype B was markedly better than in those with genotypes C and D, and the complete response to IFN-alpha was only observed in genotype B. The response to IFN-alpha in patients with mixed genotypes was the least sensitive. The negative transition of HBeAg was correlated with variations in the HBV pre-C and BCP regions in patients with partial or no response to IFN-alpha. The variation rates of HBV pre-C and BCP regions were clearly higher in genotype C than in genotype B. CONCLUSIONS: The results suggest that HBV genotype is correlated with the serum levels of HBV-DNA, HBV gene variations and therapeutic efficacy of IFN-alpha. The regular detection of HBV genotypes in the clinic will be of benefit for disease prognosis and planning of anti-viral therapeutic strategies.

The Predictive Value of Baseline HBs Ag Level and Early Response for HBs Ag Loss in Patients with HBe Ag-positive Chronic Hepatitis B during Pegylated Interferon Alpha-2a Treatment

Objective To explore the predictive value of baseline HBs Ag level and early response for HBs Ag loss in patients with HBe Ag-positive chronic hepatitis B during pegylated interferon alpha-2a treatment. Methods A total of 121 patients with HBe Ag-positive chronic hepatitis B who achieved HBs Ag loss were enrolled; all patients were treated with PEG-IFNα-2a 180 μg/week. Serum HBV DNA and serological indicators （HBs Ag, anti-HBs, HBe Ag, and anti-HBe） were determined before and every 3 months during treatment. Results The median treatment time for HBs Ag loss was 84 weeks （7-273 weeks）, and 74.38% （90 cases） of the patients needed extended treatment （〉 48 weeks）. The correlation between baseline HBs Ag levels and the treatment time of HBs Ag loss was significant （B = 14.465, t = 2.342, P = 0.021）. Baseline HBs Ag levels together with the decline range of HBs Ag at 24 weeks significantly correlated with the treatment time of HBs Ag loss （B = 29.862, t = 4.890, P = 0.000 and B = 27.993, t = 27.993, P = 0.005）. Conclusion Baseline HBs Ag levels and extended therapy are critical steps toward HBs Ag loss. Baseline HBs Ag levels together with early response determined the treatment time of HBs Ag loss in patients with HBe Ag-positive chronic hepatitis B during pegylated interferon alpha-2a treatment.

α-干扰素联合索拉菲尼对肝癌细胞增殖的抑制作用及其对STAT3通路的影响

目的:探讨α-干扰素(IFN-α)联合索拉菲尼对肝癌细胞增殖的抑制作用及其对转录激活因子3(STAT3)的影响。方法:选取人肝癌细胞株HepG2,分为空白对照组(未经任何处理的HL-60细胞)、IFN-α组(加入4000 U/ml IFN-α)、索拉菲尼组(加入2μmol/L索拉菲尼)、IFN-α+索拉菲尼组(加入4000 U/ml和2μmol/L索拉菲尼),取经药物处理后的各组细胞混悬液,继续培养24、48、72 h,采用CCK8检测HepG2细胞存活率,MTT法检测HepG2细胞增殖抑制率,行蛋白质免疫印迹(Western blot)、实时定量PCR(qRT-PCR)测HepG2细胞中STAT3、Survivin mRNA和蛋白表达,并进行细胞形态学观察。结果:空白对照组细胞形态完整,轮廓清晰,呈梭形,贴壁状态良好,IFN-α组、索拉菲尼组部分胞浆肿胀、胞膜破裂、细胞形态、胞膜界限模糊不清,IFN-α+索拉菲尼组,细胞核缩小、染色质固缩、部分细胞碎裂、死亡。IFN-α+索拉菲尼组细胞增殖抑制率高于IFN-α组、索拉菲尼组(均P<0.05)。与空白对照组、IFN-α组、索拉菲尼组比较,IFN-α+索拉菲尼组细胞G 1期细胞器增多,S、G 2期细胞减少(均P<0.05)。与空白对照组比较,IFN-α组、索拉菲尼组、IFN-α+索拉菲尼组细胞中STAT3、Survivin mRNA和蛋白表达均降低,但IFN-α组和索拉菲尼组比较无统计学差异(均P<0.05),IFN-α+索拉菲尼组低于其余三组(均P<0.05)。结论:α-干扰素联合索拉菲尼可抑制HepG2细胞增殖并诱导凋亡,其机制可能是通过调节STAT3通路发挥作用。

T29C genotype polymorphism of estrogen receptor alpha is associated with initial response to interferon-alpha therapy in chronic hepatitis B patients

BACKGROUND: Virological clearance, delayed progression to cirrhosis or liver cancer, and increased survival are the long-term goals of antiviral therapy in chronic hepatitis B patients. Identification of host factors correlated with therapeutic response may contribute greatly to individual treatment. This study aimed at investigating whether T29C genotype polymorphism of estrogen receptor alpha (ESR1) is associated with the initial response to interferon-alpha (IFN-alpha) therapy in chronic hepatitis B patients. METHODS: The initial responses of 100 patients to IFN-alpha therapy were evaluated and compared by classifying them into three groups according to T29C genotype polymorphism of ESR1: T/T, TIC, and C/C genotype groups. Polymerase chain reaction-restriction fragment length polymorphism was used to analyze the genotype polymorphism in T29C. RESULTS: The frequency of initially combined response was markedly higher in both the T/T and TIC groups than in the C/C group (Z=10.326, P=0.006 and Z=26.247, P=0.000, respectively). In addition, the initial virological response was higher in the T/T and T/C groups than the C/C group (chi(2)=5.674, P=0.017 and chi(2)=4.980, P=0.026, respectively). In 78 initially HBeAg-positive patients, however, the frequency of initial e-antigen disappearance or seroconversion among the T/T, T/C, and C/C genotype groups was 34.15%, 27.78% and 15.79%, respectively, which were not significantly different. CONCLUSION. The T29C genotype polymorphism of ESR1 is associated with the initial response to IFN-alpha in patients with chronic hepatitis B, and might be a significant marker for predicting the initial response to IFN-alpha, at least in this study population. (Hepatobiliary Pancreat Dis Int 2010; 9: 275-279)

Combination Therapy with Pegylated Interferon alpha-2b and Adefovir Dipivoxil in HBeAg-positive Chronic Hepatitis B versus Interferon Alone: A Prospective, Randomized Study

Currently available monotherapies of oral nucleoside/nucleotide analogs or interferon are unable to achieve a sustained and effective response in most of patients with chronic hepatitis B（CHB）. The objective of the present study was to compare the efficacy and safety of pegylated interferon（Peg-IFN） alpha-2b plus adefovir dipivoxil combination therapy versus Peg-IFN alpha-2b alone. Sixty-one HBeAg-positive chronic hepatitis B patients were randomized to receive Peg-IFN alpha-2b alone（1.5 μg/kg once weekly） or Peg-IFN alpha-2b plus adefovir（10 mg daily） for up to 52 weeks. Efficacy and safety analyses were performed on all participants who received at least one dose of study medication. The rate of HBeAg seroconversion and undetectable HBV-DNA were evaluated after 52 weeks of therapy. At the end of treatment, 11 of 30（36.7%） patients receiving combination therapy achieved HBeAg seroconversion versus 8 of 31（25.8%） in the monotherapy group（P=0.36）. In contrast, the percentage of patients with undetectable serum HBV DNA was significantly higher in the combination group than in the monotherapy group（76.7% vs. 29.0%, P〈0.001）. Thyroid dysfunction was more frequent in the combination group than in the monotherapy group（P〈0.05）. In HBeAg-positive CHB, combination of Peg-IFN alpha-2b and adefovir for 52 weeks resulted, at the end of treatment, in a higher virological response but without significant impact on the rate of HBeAg seroconversion and possibly an adverse effect on thyroid function.

补肾调经汤联合人重组干扰素-α-2b对子宫内膜异位症体液免疫、CA125、EMAb水平的影响

【目的】探析补肾调经汤(在《景岳全书》大营煎方的基础上加味而成)联合人重组干扰素-α-2b治疗子宫内膜异位症(endometriosis,EMs)疗效及其对体液免疫、血清糖类抗原125(carbohydrate antigen,CA125)、抗子宫内膜抗体(antiendometrial antibody,EMAb)水平的影响。【方法】将86例EMs肾虚血瘀证患者随机分为观察组和对照组,每组各43例。对照组单纯给予人重组干扰素-α-2b治疗,观察组给予补肾调经汤联合人重组干扰素-α-2b治疗,疗程为1个月。观察2组患者治疗前后体液免疫因子[免疫球蛋白A(immunoglobulin A,IgA)、补体3(complement 3,C3)、补体4(complement 4,C4)]、子宫内膜异位包块直径及病理相关因子(CA125、EMAb)水平的变化情况,并评价2组患者的临床疗效和安全性。【结果】(1)治疗1个月后,观察组的总有效率为97.67%(42/43),对照组为81.40%(35/43),组间比较(χ2检验),观察组的疗效明显优于对照组(P<0.05)。(2)治疗后,2组患者的血清IgA水平均较治疗前明显升高(P<0.05),血清C3、C4水平均较治疗前明显降低(P<0.05),且观察组对血清IgA水平的升高幅度及对血清C3、C4水平的降低幅度均明显优于对照组(P<0.01)。(3)治疗后,2组患者的血清CA125、EMAb水平及子宫内膜异位包块直径均较治疗前明显降低(P<0.05),且观察组对血清CA125、EMAb水平及子宫内膜异位包块直径的降低幅度均明显优于对照组(P<0.01)。(4)观察组的不良反应总发生率为6.98%(3/43),对照组为11.63%(5/43),组间比较,差异无统计学意义(P>0.05)。【结论】补肾调经汤联合人重组干扰素-α-2b治疗EMs肾虚血瘀证患者临床疗效显著,可有效改善患者体液免疫因子及血清CA125、EMAb水平,缩小子宫内膜异位包块,且具有较高的安全性。

The Expression of Interleukin-17, Interferon-gamma, and Macrophage Inflammatory Protein-3 Alpha mRNA in Patients with Psoriasis Vulgaris

Summary: To investigate the role of Interleukin-17 (IL-17), Interferon-gamma (IFN-γ), and macrophage inflammatory protein-3 alpha (MIP-3α) in the pathogenesis of psoriasis, reverse transcriptase-polymerase chain reaction (RT-PCR) was used to semi-quantitatively analyze the mRNA expression of IL-17, IFN-γ, and MIP-3α in 31 psoriatic lesions and 16 normal skin tissues. The results showed that the mRNA of the three cytokines was present in all specimens. And the expression level of IL-17 mRNA in skin lesions was 1.1416±0.0591, which was significantly higher than that in normal controls (0.8788±0.0344, P<0.001). The expression levels of IFN-γ mRNA were 1.1142±0.0561 and 0.9050±0.0263, respectively, with significant difference(P<0.001). And the expression levels of MIP-3α mRNA in psoriatic lesions was 1.1397±0.0521, which was markedly higher than that in normal controls (0.8681±0.0308, P<0.001). These findings indicate that up-regulated expression of IL-17, IFN-γ, and MIP-3α might be involved in the pathogenesis of psoriasis.

Clinical correlations between chronic hepatitis C infection and decreasing bone mass density after treatment with interferon-alpha

Objective: To compare the bone mass density in chronic hepatitis patients before and after interferon-a treatment.Methods: A total of 70 patients with chronic hepatitis C were treated with interferon-a and were evaluated. The treatment dosage was three million IU three times a week for one year. All the patients underwent bone mass density detection at lumbar spine and femoral neck before and after the interferon-a treatment. All the necessary information such as age,sex, and laboratory test, history of occurrence of fractures, lifestyle, and menopause status was collected by interviewers face-to-face from participants at the research visit. Smoking was categorized by whether participants were nonsmokers or smokers. Menopause was designated if there had been complete cessation of menses for more than 12 months. All statistical analyses were performed by SPSS version 14(SPSS, Inc., Chicago, IL, USA).Results: Among 70 patients, 52% were male, 48% were female and the mean age was(57.0 ± 9.6) years(range: 24–79). Twenty-nine percent of the patients had a history of smoking. The mean body mass index was(24.4 ± 3.6) kg/m^2(range: 18.4–35.3). Of the70 cases, 21 had high fibrosis-4. The prevalence of overall fracture history was 2.9%(two patients).Conclusions: Chronic hepatitis C virus infection did increase the risk of development of metabolic bone disease in this cohort. Indeed, greater reduction of bone mass density occurs in advanced liver fibrosis. The bone loss in earlier stages of chronic hepatitis C infection is likely to result from increased bone reduction rather than decreased bone formation. Overall, these observations suggest an important role for chronic hepatitis C virus infection in increased bone turnover in osteodystrophy pathogenesis.

Effect of sustained virological response on long-term clinical outcome in 113 patients with compensated hepatitis C-related cirrhosis treated by interferon alpha and ribavirin

AIM： To assess the long-term clinical benefit of sustained virological response （SVR） in patients with hepatitis C virus （HCV） cirrhosis treated by antiviral therapy using mostly ribavirin plus interferon either standard or pegylated.METHODS： One hundred and thirteen patients with uncomplicated HCV biopsy-proven cirrhosis, treated by at least one course of antiviral treatment ≥ 3 mo and followed ≥ 30 mo were included. The occurrence of clinical events [hepatocellular carcinoma （HCC）, decompensation and death] was compared in SVR and non SVR patients.RESULTS： Seventy eight patients received bitherapy and 63 had repeat treatments. SVR was achieved in 37 patients （33%）. During a mean follow-up of 7.7 years, clinical events occurred more frequently in non SVR than in SVR patients, with a significant difference for HCC （24/76 vs 1/37, P = 0.01）. No SVR patient died while 20/76 non-SVR did （P = 0.002）, mainly in relation to HCC （45%）.CONCLUSION： In patients with HCV-related cirrhosis, $VR is associated with a significant decrease in the incidence of HCC and mortality during a follow-up period of 7.7 years. This result is a strong argument to perform and repeat antiviral treatments in patients with compensated cirrhosis.

SerpinE1通过JAK/STAT通路调节HIV-1在巨噬细胞中的复制

目的:探讨丝氨酸蛋白酶抑制剂E家族成员1(SerpinE1)与人类免疫缺陷病毒1型(HIV-1)感染的关系,及其作为一种蛋白酶抑制剂在巨噬细胞中对HIV感染过程发挥的作用和机制。方法:按年龄、性别特征成组匹配,招募HIV感染未治疗人群[HIV ART(-)组]和健康对照人群(HC组),并检测外周血单个核细胞(PBMCs)中SerpinE1 mRNA表达量。在THP-1细胞中构建SerpinE1敲低细胞(敲低SerpinE1组),感染或不感染HIV BaL。酶联免疫吸附试验(ELISA)法检测HIV-p24和干扰素(IFN)-α蛋白水平,有参转录组测序分析染毒后敲低SerpinE1组与对照组的差异基因和KEGG富集通路,实时荧光定量PCR(RT-qPCR)法检测HIV-1 Gag、Toll样受体7(TLR7)、Toll样受体8(TLR8)、白细胞介素-1β(IL-1β)、MX动力蛋白样GTPase 1(MX1)、MX动力蛋白样GTPase 2(MX2)mRNA相对表达量,western blotting法检测JAK2、STAT1、STAT2、SATA4、IL-1β和MX1蛋白表达水平。结果:与HC组比较,HIV ART(-)组SerpinE1表达水平降低,并且在THP-1来源的巨噬细胞中能够被HIV诱导下调(P<0.05);敲低SerpinE1表达下调HIV-p24蛋白表达和HIV Gag mRN A表达,促进IFN-α蛋白分泌水平,促进TLR7、TLR8、Janus激酶2(JAK2)、信号转导子和转录激活子(STAT)蛋白家族的STAT1、STAT2、SATA4及IL-1β、MX1、MX2的表达(P<0.05)。结论:SerpinE1可能通过抑制TLR7和TLR8信号通路的激活,减少IFN-α的释放,进而抑制JAK/STAT通路及其诱导的多种IFN刺激基因和IFN相关因子表达,从而促进了HIV-1的感染复制。

不同剂量干扰素α-2b雾化吸入治疗儿童病毒性肺炎的临床疗效

目的 探讨采用不同剂量干扰素α-2b雾化吸入治疗儿童病毒性肺炎的临床疗效及对免疫功能的影响。方法 选取2022年1月至2023年12月于河南省社旗县人民医院治疗的90例病毒性肺炎患儿,按治疗方法分为低剂量组(30例)、高剂量组(30例)与对照组(30例)。对照组采用常规治疗,低剂量组于对照组基础上采用低剂量干扰素α-2b治疗,高剂量组于对照组基础上采用高剂量干扰素α-2b治疗。比较3组临床疗效、免疫功能、炎性因子、临床症状消失时间及不良反应。结果 高剂量组与低剂量组治疗总有效率高于对照组,高剂量组与低剂量组治疗后CD4+及CD4+/CD8+高于对照组,CD8+低于对照组;高剂量组治疗后CD4+及CD4+/CD8+高于低剂量组,CD8+低于低剂量组,高剂量组与低剂量组治疗后C反应蛋白(CRP)、肿瘤坏死因子-α(TNF-α)及白细胞介素-6(IL-6)水平低于对照组;高剂量组治疗后CRP、TNF-α及IL-6水平低于低剂量组,高剂量组与低剂量组治疗后肺部音、喘憋、咳嗽、退热时间短于对照组;高剂量组肺部音、喘憋、咳嗽、退热时间短于低剂量组,差异有统计学意义(P<0.05);高剂量组与低剂量组治疗总有效率及3组不良反应总发生率比较,差异无统计学意义(P>0.05)。结论 儿童病毒性肺炎采用干扰素α-2b雾化吸入治疗能够改善患儿免疫功能,降低炎性因子水平,不良反应并未增加,且高剂量干扰素α-2b雾化吸入治疗效果更佳。

α-干扰素治疗慢性乙型肝炎对患者肝功能、乙型肝炎表面抗原及甲状腺功能的影响

目的探讨α-干扰素治疗慢性乙型肝炎对患者肝功能、乙型肝炎表面抗原(HBsAg)及甲状腺功能的影响。方法选取2019年1月1日至2022年7月31日在该院诊治的符合纳入标准的130例慢性乙型肝炎患者进行分析。所有患者均给予聚乙二醇干扰素α-2b治疗,根据治疗后是否发生病毒学应答分为应答组、无应答组。比较两组血常规、肝功能指标、HBsAg、乙型肝炎e抗原(HBeAg)、乙型肝炎病毒DNA(HBV-DNA)及甲状腺功能的变化。结果应答组60例,无应答组70例。治疗后,应答组ALT水平明显低于无应答组(P<0.05),两组血清AST、总胆红素水平比较,差异均无统计学意义(P>0.05)。治疗后,应答组患者HBsAg、HBeAg、HBV-DNA水平明显低于无应答组(P<0.05)。治疗后,应答组促甲状腺激素(TSH)水平明显低于未应答组(P<0.05),总三碘甲状腺氨酸(TT3)、总甲状腺素(TT4)、游离三碘甲状腺原氨酸(FT3)、游离甲状腺素(FT4)水平明显高于未应答组(P<0.05)。治疗后,应答组患者甲状腺疾病总发生率为8.33%,无应答组甲状腺疾病总发生率为27.14%,两组比较,差异有统计学意义(P<0.05)。结论接受α-干扰素治疗并发生病毒学应答的慢性乙型肝炎患者临床效果显著,可明显改善患者肝功能,加快机体内乙型肝炎病毒的转阴速度,其中甲状腺功能改变是患者使用α-干扰素治疗过程中的常见不良反应,需监测甲状腺功能相关指标,对甲状腺功能异常的积极治疗可保证α-干扰素治疗的效果。

Identification of genes upregulated by recombinant interferon-alpha in HepG2 cells by suppressive subtractive hybridization analysis

BACKGROUND: Interferon-alpha (IFN-alpha) is an important cytokine with multiple functions, but the target genes transactivated by IFN-alpha remain largely unknown. A study of such genes will help to understand the mechanism of function of IFN-alpha. To isolate the gene transcripts specifically upregulated by IFN-alpha in HepG2 cells, we conducted suppressive subtractive hybridization (SSH) analysis. METHODS: SSH was used to analyze the target genes transactivated by recombinant IFN-alpha protein, and a subtractive cDNA library was constructed from HepG2 cells treated with recombinant IFN-alpha (rIFN-alpha, 2000 IU/ml) for 16 hours as tester, and cells not treated with rIFN-alpha as driver. The SSH PCR products from the library were cloned into pGEM-T easy vector and with BLASTX, the positive clones were randomly selected, sequenced and compared to the database in GenBank of the 35 differentially expressed gene fragments from the library, 6 clones showed significant homology to other known proteins. RESULTS: The subtractive cDNA library of genes upregulated by IFN-alpha was constructed successfully, rIFN-alpha upregulated the expression of the RAN binding protein 5 (RANBP5), NADH dehydrogenase, exosome component 3 (EXOSC3), zinc finger RNA binding protein, Dickkopf homolog 1 (DKK1) and acetyl-coenzyme A acetyltransferase 2 (ACAT2). CONCLUSIONS: These results suggest that rIFN-alpha can upregulate the expression of important genes to exert its functions, and provide new clues for discovering the molecular mechanisms of action of IFN-alpha.

Cloning and high-level expression of human interferon alpha-8 in E.coli

Human interferon alpha-8(IFN-α8) is an important cytokine with multiple biological functions.A genetically engineered strain, E. coli XL1-Blue/pBm, was constructed by DNA recombination technology and characterized by restriction analysis, DNA sequencing.

Purification of Recombinant Porcine Interferon-Alpha

[ Objective] To study the purification of recombinant porcine interferon-alpha （rPolFN-alpha） and lay a foundation for researches on the structure of the rPolFN-alpha and the preparation of standard proteins. [ Method] The rPolFN-alpha were induced and extracted from the recombi- nant E. coil BL21, and they were purified by two strategies. The first strategy was that the rPolFN-alpha were purified by GST （ glutathione S transferase） affinity chromatography, DEAE （diethylaminoethyl） anion exchange chromatography and gel filtration in turn defined as three-step chromatography method; the second strategy was that the rPolFN-alpha were purified by GST affinity chromatography and gel filtration in tum defined as two-step chromatography method. Then the purified products were detected by the SDS-PAGE （sodium dodecyl sulfate polyacrylamide gel electrophoresis） and were identified by western-blotting. [Result] The purity quotient of pudfied products of the two-step chromatography method was 96.0% and that of the three-step chromatography method was 98.8%. The purified products were detected by the SDS-PAGE and the western- blotting, respectively. The results showed that the target band was 45.0 kDa and the specific band was found. [ Conclusion] The purity quotient of proteins of the two-step chromatography method is close to that of the three-step chromatography method, thus the two-step chromatography meth- od is more convenient and more suitable for pilot production than the three-step chromatography method.