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塞来昔布协同顺铂PI3K/Akt途径诱导骨肉瘤MG-63细胞凋亡的实验研究 被引量:6

Apoptosis induced by celecoxib combinated with cisplatin in human osteosarcoma cell line MG-63 via down-regulation of PI3K/Akt
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摘要 目的探讨环氧化酶-2(COX-2)选择性抑制剂塞来昔布对人骨肉瘤MG-63细胞增殖和凋亡的影响及作用机制。方法塞来昔布(50μmol/L或100μmol/L)和(或)顺铂(10μg/ml)作用骨肉瘤MG-63细胞48h后,MTT法测定细胞增殖的抑制率,电子显微镜和流式细胞仪检测细胞凋亡,RT-PCR法检测基因水平COX-2表达变化,Western blot检测COX-2及凋亡相关蛋白表达变化。PI3K抑制剂Wortmannin作用MG-63细胞48h,检测蛋白表达变化。结果塞来昔布导致MG-63细胞阻滞在G1期,通过激活半胱氨酸天冬氨酸蛋白酶(caspase)-9的内源性凋亡途径诱导细胞凋亡;顺铂单药作用后骨肉瘤MG-63细胞凋亡率为5.93%,而联合应用塞来昔布50μmol/L或100μmol/L后,凋亡率分别为6.66%和37.15%,与顺铂联合具有明显的协同作用;COX-2蛋白表达未降低。塞来昔布联合顺铂明显降低PI3K/Akt、survivin、Bcl-2的表达,检测到caspase-9、caspase-3的激活和PARP裂解片段。Wortmannin作用MG-63细胞48h,检测到pAkt(Thr308)、Bcl-2、survivin表达下调。结论塞来昔布可通过非COX-2途径诱导骨肉瘤MG-63细胞凋亡,与PI3K/Akt、survivin、Bcl-2蛋白相关,并且PI3K/Akt途径在survivin、Bcl-2表达调控中发挥重要作用。这可能是塞来昔布药物干预的中心环节。 Objective To identify the anti-proliferation of celecoxib, a selective eyelooxygenase-2 (COX-2) inhibitor, and the combination of celecoxib and cisplatin in MG-63 cells, and to explore the potential molecular mechanisms involved. Methods MG-63 cells were treated with the combination of eeleeoxib (50 μmol/L or 100 μmol/L) and/or cisplatin (10μg/ml) for 48 h in serum-supplemented medium. Cell viability was measured by MTT assay; apoptosis was determined by electronmicroscope and flow eytometry (FCM); gene transcription and protein expression were detected by RT-PCR and/or Western blot analysis. Results MG-63 cells were significantly inhibited by celecoxib at G1 phase. The eisplatin-indueed apoptosis was 5.93%, and potentiated to 6.66% and 37.15% while combining with celeeoxib (50 μmol/L and 100 μmol/L) respectively. There was significant synergetic effect between celecoxib and cisplatin. The protein expression of COX-2 did not occur in ceils treated with celecoxib. PI3K/Akt, survivin, Bcl-2 were significantly downregulated in cells treated with the combination of celecoxib and cisplatin. Moreover, the decreased expressions of pro-caspase-9, pro-easpase-3 and cleaved PARP-1 were detected by Western blot analysis. And pAkt (Thr308), survivin and Bel-2 levels down-regulated in cells treating with Wortmannin for 48 h, a specific PI3K inhibitor. Conclusion Celecoxib exerts its anti-tumor activities through COX-2 independent mechanisms, which may be PI3K/Akt-dependent, and smwivin and Bcl-2-related. PI3K may be at the center of the celeeoxib effects, which play an essential role in the regulation of survivin and Bcl-2.
出处 《中华骨科杂志》 CAS CSCD 北大核心 2009年第7期684-689,共6页 Chinese Journal of Orthopaedics
关键词 骨肉瘤 顺铂 细胞凋亡 半胱氨酸天冬氨酸蛋白酶 Osteosarcoma Cisplatin Apoptosis Caspases
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参考文献25

  • 1Bacci G, Longhi A, Fagioli F, et al. Adjuvant and neoadjuvant chemotherapy for osteosarcoma of the extremities: 27 year experience at Rizzoli Institute, Italy. Ear J Cancer, 2005, 41(18): 2836- 2845.
  • 2Kalifa C, Brugieres L Le Deley MC. Neoadjuvant treatment in osteosarcomas. Bull Cancer, 2006, 93(11):1115-1120.
  • 3Chandrasekharan NV, Dai H, Roos KL, et al. COX-3, a cyclooxygenase-I variant inhibited by acetaminophen and other analgesic/antipyretic drugs: cloning, structure, and expression. Proc Natl Acad Sci U S A, 2002, 99(21): 13926-13931.
  • 4Tsujii M, Kawano S, Tsuji S, et al. Cyclooxygenase regulates angiogenesis induced by colon cancer cells. Cell, 1998, 93(5): 705- 716.
  • 5Eberhart CE, CoffeyRJ, Radhika A, et al. Up-regulation of cyclooxygenase 2 gene expression in human coloreetal adenomas and adenocareinomas. Gastroenterology, 1994, 107 (4): 1183- 1188.
  • 6Koga H, Sakisaka S, Ohisbi M, et al. Expression of cyclooxygenase-2 in human hepatocellular carcinoma: relevance to tumor dedifferentiation. Hepatology, 1999, 29(3): 688-696.
  • 7Tucker ON, Dannenberg A J, Yang EK, et al. Cyelooxygenase-2 expression is up-regulated in human pancreatic cancer. Cancer Res,1999, 59(5): 987-990.
  • 8Hwang D, Scollard D, Byrne J, et al. Expression of cyclooxygenase-1 and cyclooxygenase-2 in human breast cancer. J Natl Cancer last, 1998, 90(6): 455-460.
  • 9Hida T, Yatabe Y, Achiwa H, et al. Increased expression of cyclooxygenase 2 occurs frequently in human lung cancers, specifically in adenocarcinomas. Cancer Res, 1998, 58(17): 3761-3764.
  • 10Naruse T, Nishida Y, Hosono K, et al. Meloxicam inhibits osteosarcoma growth, invasiveness and metastasis by COX-2-dependent and independent routes. Carcinogenesis, 2006, 27 (3): 584-592.

二级参考文献5

  • 1Sano H,Kawahito Y,Wilder RL et al.Expression of cyclooxygenase-1 and-2 in human colorectal cancer.Cancer Res,1995,55(17) :3785
  • 2Cao Y,Prescott SM.Many actions of cyclooxygenase-2 in cellular dynamies and in cancer.J Cell Physiol,2002,190(3):279
  • 3Masferrer JL,Leahy KM,Koki AT et al.Antiangiogentic and antitumor of cyclooxygenase-2 inhibitors.Cancer Res,2000,60(5):1306
  • 4Hida T,Yatabe Y,Achiwa H et al.Increased expression of cyclooxygenase 2 occurs frequently in human lung cancers,specifically in adenocarcinomas.Cancer Res,1998,58(17):3761
  • 5Cianchi F,Cortesini C,Bechi P et al.Up-regulation of cyclooxygenase 2 gene expression correlates with tumor angiogenesis in human colorectal cancer.Gastroenterology,2001,121(6):1339

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