Efficacy of lumiracoxib in relieving pain associated with knee osteoarthritis: a 6‐week,randomized, double‐blind,parallel‐group study

Aim: The aim of the current study was to assess the efficacy, safety, and tolerability of lumiracoxib 200 mg once daily (o.d.) in relieving osteoarthritis (OA) knee pain in patients in China, Taiwan, and South Korea. Methods: Patients of either sex (aged ≥ 18 years) with symptomatic, primary OA of the knee for ≥ 3 months were eligible for inclusion if they had OA pain intensity of ≥ 40 mm (100 mm visual analogue scale [VAS]) in the target knee joint during the previous 24 h. Patients were required to undergo regular non‐steroidal anti‐inflammatory drug therapy for ≥ 6 weeks. After 3–7 days of screening, patients were randomized (1 : 1) to receive either lumiracoxib 200 mg o.d. or celecoxib 200 mg o.d. The primary efficacy comparison between the study groups was overall OA pain intensity (VAS) in the target knee after 6 weeks of treatment. Results: The mean overall OA pain intensity (VAS) in the target knee after 6 weeks decreased from 60.6 mm to 35.7 mm and 60.5 mm to 36.1 mm in the lumiracoxib and celecoxib groups, respectively. Both study groups showed similar results in terms of improvement in both patient's and physician's global assessment of disease activity and functional health status. The percentage of adverse events (AEs) in the lumiracoxib and celecoxib groups (40.3% and 37.9%, respectively) was similar, as was the proportion of treatment‐related AEs (21.0% and 18.2%, respectively). Conclusions: Lumiracoxib 200 mg o.d. provided effective and well‐tolerated pain relief similar to that achieved with celecoxib 200 mg o.d. in knee OA patients.     

EFFECTS OF p53 GENE THERAPY COMBINED WITH CYCLOOXYGENASE-2 INHIBITOR ON CYCLOOXYGENASE-2 GENE EXPRESSION AND GROWTH INHIBITION OF HUMAN LUNG CANCER CELLS

Background Gene therapy by adenovirus-mediated wild-type p53 gene transfer has been shown to inhibit lung cancer growth in vitro, in animal models, and in human clinical trials. The antitumor effect of selective cyclooxygenase （COX）-2 inhibitors has been demonstrated in preclinical studies. However, no information is available on the effects of p53 gene therapy combined with selective COX-2 inhibitor on COX-2 gene expression and growth inhibition of human lung cancer cells. Methods We evaluated the effects of recombinant adenovirus-p53 （Adp53） gene therapy combined with selective CADX-2 inhibitor on the proliferation, apoptosis, cell cycle arrest of human lung adenocarcinoma A549 cell line, and the effects of tumor suppressor exogenous wild type p53 on COX-2 gene expression. Results Ad-p53 gene therapy combined with selective COX-2 inhibitor celecoxib shows significant synergistic inhibition effects on the growth of human lung adenocarcinoma A549 cell line. Exogenous p53 gene can suppress COX-2 gene expression. Conclusions Significant synergistic inhibition effects of A549 cell line by the combined Ad-p53 and selective COX-2 inhibitor celecoxib may be achieved by enhancement of growth inhibition, apoptosis induction and suppression of COX-2 gene expression. This study provides first evidence that the administration of p53 gene therapy in combination with COX-2 inhibitors might be a new clinical strategy for the treatment or prevention of NSCLC.     

塞来昔布对大鼠化学性乳腺癌的抑制作用及机制

目的 观察环氧化酶-2(cyclooxygenase-2,COX-2)选择性抑制剂塞来昔布对化学致癌剂7,12-二甲基苯蒽(7,12-dimethybenz[a]anthracene,DMBA)化学诱发的大鼠乳腺癌的抑制作用并探讨其机制.方法 将DMBA油剂灌胃复制大鼠乳腺癌模型,大鼠分为对照组(24只)和实验组(25只),观察塞来昔布对大鼠乳腺癌的抑制作用,并采用基因芯片技术了解治疗后2组肿瘤的基因表达谱差异.结果 实验组塞来昔布处理后乳腺肿瘤的数目、直径、体积分别为(2.56±1.26)个、(1.162±0.355)cm、(1.967±1.725)cm.;明显小于实验前的(3.40±1.22)个、(1.948±0.481)cm、(8.794±6.389)cm3;明显小于对照组(3.88±1.73)个、(2.231±0.736)cm、(10.268±5.447)cm3,差异有显著性意义(均P＜0.01).对照组COX一2蛋白表达为62.5%(15/24),实验组COX-2蛋白表达为36.0%(9/25),差异有显著性意义(P＜O.05).基因表达谱显示两组之间表达丰度差异2倍及以上的基因共有243条,其中表达上调2倍或以上的基因片段124条,表达下调2倍或以上的基因片段119条,发现功能不明的新基因6条,其中表达上调的4条.结论 塞来昔布能抑制DMBA诱发的大鼠乳腺癌进展,其机制和多种基因改变有关.     

反相高效液相色谱法测定塞来昔布片含量

目的 :建立反相高效液相色谱法测定塞来昔布片的含量。方法 :采用ZorbaxSB -C18色谱柱 ,以 0 .0 2mol·L-1磷酸二氢钾缓冲液 (pH5 .8) 乙腈 (4 5 :5 5 )为流动相 ,流速为 1.0mL·min-1,以 5 甲基 2 硝基苯酚为内标物 ,检测波长为 2 5 2nm。结果 :塞来昔布在 10 .2～ 5 0 .1mg·L-1范围内呈良好线性 (r =0 .9998) ,平均回收率为 99.8% ,RSD为 0 .35 %。结论 :本法可用于该片的含量测定 ,操作简便 ,结果准确。     

塞来昔布联合吉非替尼对HCC827细胞凋亡影响机制探讨

目的探讨Cox-2抑制剂塞来昔布联合吉非替尼对肺癌EGFR 19号外显子E746-A750缺失细胞株HCC827细胞凋亡的影响及其可能机制。方法 RPMI1640培养HCC827细胞,分为正常对照组、塞来昔布组、吉非替尼组、塞来昔布加吉非替尼组。塞来昔布与吉非替尼药物浓度均为5、10、20、40、80μmol/L。药物干预细胞48h后,MTT法检测细胞增殖,流式细胞术检测细胞凋亡,蛋白质印迹法检测细胞中Cox-2和p-EGFR蛋白表达。结果 MTT结果显示,塞来昔布和吉非替尼单独用药时HCC827细胞的增殖受到明显的抑制,且随着药物浓度的增加,抑制作用逐步增强,药物剂量与细胞增殖抑制率呈正相关;塞来昔布与吉非替尼联合用药时对HCC827细胞呈现出更强的抑制作用,与单独用药相比差异有统计学意义,P<0.001;对照组细胞凋亡率为(0.26±0.09)%,塞来昔布组为(4.86±0.37)%,吉非替尼组为(8.53±0.78)%,塞来昔布+吉非替尼组为(23.28±1.63)%,组间比较差异有统计学意义,F=111.291,P<0.001,且两药联合时具有交互效应,F=90.440,P<0.001;蛋白质印记法结果显示,用药组较对照组Cox-2(F=185.351,P<0.001)和p-EGFR(F=61.328,P<0.001)蛋白水平均有不同程度的下调,其中两药联合组下调最为明显。结论塞来昔布与吉非替尼具有良好的协同作用,其机制可能与诱导凋亡、抑制EGFR的活化和下调Cox-2蛋白的表达有关,在治疗非小细胞肺癌中联合用药可能会具有较大的应用潜力。     

The Efficacy and Safety of Celecoxib in Addition to Standard Cancer Therapy: A Systematic Review and Meta-Analysis of Randomized Controlled Trials

The purpose of this meta-analysis was to evaluate the efficacy and safety of celecoxib, a selective cyclooxygenase-2 (COX-2) inhibitor, in addition to standard anticancer therapy. Randomized controlled trials (RCTs) that evaluated the efficacy and safety of celecoxib-combined cancer therapy were systematically searched in PubMed and Embase databases. The endpoints were overall survival (OS), progression-free survival (PFS), disease-free survival (DFS), objective response rate (ORR), disease control rate (DCR), pathological complete response (pCR), and adverse events (AEs). The results of 30 RCTs containing 9655 patients showed limited benefits in celecoxib-combined cancer therapy. However, celecoxib-combined palliative therapy prolonged PFS in epidermal growth factor receptor (EGFR) wild-type patients (HR = 0.57, 95%CI = 0.35–0.94). Moreover, despite a slight increase in thrombocytopenia (RR = 1.35, 95%CI = 1.08–1.69), there was no increase in other toxicities. Celecoxib combined with adjuvant therapy indicated a better OS (HR = 0.850, 95%CI = 0.725–0.996). Furthermore, celecoxib plus neoadjuvant therapy improved the ORR in standard cancer therapy, especially neoadjuvant therapy (overall: RR = 1.13, 95%CI = 1.03–1.23; neoadjuvant therapy: RR = 1.25, 95%CI = 1.09–1.44), but not pCR. Our study indicated that adding celecoxib to palliative therapy prolongs the PFS of EGFR wild-type patients, with good safety profiles. Celecoxib combined with adjuvant therapy prolongs OS, and celecoxib plus neoadjuvant therapy improves the ORR. Thus, celecoxib-combined cancer therapy may be a promising therapy strategy.     

塞来昔布上调Cyclin D1基因甲基化水平对食管癌细胞增殖和凋亡的抑制作用

目的探究塞来昔布通过上调Cyclin D1基因甲基化水平对食管癌细胞增殖和凋亡的作用及机制。方法将细胞分为对照、转染和塞来昔布组,分别转染阴性对照载体、Cyclin D1过表达载体和Cyclin D1转染后给予60μmol/L塞来昔布。采用MTT法、流式细胞术分别检测细胞增殖、细胞周期和细胞凋亡率的变化,Western blotting法检测细胞周期和细胞凋亡相关蛋白表达水平;甲基化特异性PCR(MS-PCR)、qRT-PCR法用于检测Cyclin D1甲基化特异性扩增片段和Cyclin D1 mRNA表达水平。结果塞来昔布能够抑制Cyclin D1诱导的细胞体外增殖,阻滞细胞周期向S期转化,并促进食管癌细胞凋亡;MS-PCR结果显示塞来昔布能够上调Cyclin D1基因甲基化水平,在转录水平抑制细胞内Cyclin D1 mRNA的表达。结论塞来昔布能够通过上调Cyclin D1基因甲基化水平发挥抑制食管癌细胞增殖、促进其体外凋亡的作用。     

塞来昔布对人胃癌SGC-7901细胞迁移、MMP-9和VEGF表达的影响

目的观察塞来昔布对人胃癌SGC-7901细胞迁移能力及其对MMP-9 mRNA和VEGF mRNA表达的影响。方法体外培养胃癌SGC-7901细胞,将细胞分为对照组及塞来昔布低、中、高剂量组（分别加入塞来昔布25、50、100μmol/L）,处理SGC-7901细胞24 h后,应用损伤修复实验观察塞来昔布对SGC-7901细胞迁移能力的影响;RT-PCR法检测塞来昔布对SGC-7901细胞MMP-9 mRNA和VEGF mRNA表达的影响。结果 SGC-7901细胞的迁移距离随塞来昔布浓度的增加而减少,中、高剂量组与对照组比较差异有统计学意义（322.33±0.75、245.51±0.58 vs 713.23±0.44,P＜0.05）。RT-PCR法检测结果显示,随着塞来昔布处理浓度的增高,胃癌细胞MMP-9 mRNA和VEGF mRNA的表达均降低,且与对照组比较差异有统计学意义（P＜0.05）。结论塞来昔布可抑制人胃癌SGC-7901细胞的迁移,其抗肿瘤机制可能与抑制COX-2下游的MMP-9和VEGF表达有关。