出 处:《安徽医学》2013年第12期1733-1736,共4页Anhui Medical Journal
基 金:合肥市重点科研计划项目(合科【2007】15号);安徽省科技攻关课题(项目编号:12010402123)
摘 要:目的研究1,25二羟维生素[1,25(OH)2D3]联合塞来昔布对裸鼠人乳腺癌模型中肿瘤细胞增殖与血管内皮生长因子(VEGF)的影响。方法 54只裸鼠人乳腺癌模型(HS578T)随机分成9组,A组:生理盐水组(0.2 ml/只);B组:阿霉素组(1.75 mg/kg,5 d);C组:塞莱昔布组(30 mg/kg);D组:低剂量1,25(OH)2D3组(0.4μg/kg);E组:中等剂量1,25(OH)2D3组(0.8μg/kg);F组:高剂量1,25(OH)2D3组(1.6μg/kg)。G组:塞莱昔布(30 mg/kg)联合低剂量1,25(OH)2D3(0.4μg/kg)组;H组:塞莱昔布(30 mg/kg)联合中等剂量1,25(OH)2D3(0.8μg/kg)组;I组:塞莱昔布(30 mg/kg)联合高剂量1,25(OH)2D3(1.6μg/kg)。观察肿瘤大小,计算抑瘤率,免疫组化方法检测VEGF、环氧化酶-2(COX-2)、维生素受体(VDR)。结果 1,25(OH)2D3、塞莱昔布均能抑制裸鼠乳腺癌转移瘤肿瘤生长,两者联合显著提高对裸鼠转移瘤的抑制率。A组、B组、C组、D组、E组、F组、G组、H组、I组肿瘤体积分别为:(1 756.52±254.80)、(563.63±100.65)、(1 000.10±180.07)、(1 175.47±91.27)、(1 107.63±209.18)、(980.74±163.22)、(927.27±172.54)、(881.81±127.22)和(636.36±109.42)mm3。各组瘤体抑瘤率分别为69.52%、44.80%、36.04%、39.71%、46.62%、49.51%、53.23%和65.32%,各剂量组与A组差异有统计学意义(P<0.05),两药联合组较两药各自单药组均明显提高抑瘤作用。1,25(OH)2D3对VEGF的表达有抑制作用;对VDR的表达也有上调作用(P<0.05);塞莱昔布对VEGF、COX-2表达明显抑制(P<0.05);两药联合明显抑制VEGF、COX-2的表达(P<0.05),且抑制作用较单药得以增强,两药联合可以明显上调VDR的表达(P<0.05)。结论 1,25(OH)2D3可抑制裸鼠乳腺癌的生长,作用呈剂量依耐性,联合塞莱昔布可增强抑制作用,两药联合增加了对血管内皮生长因子的抑制作用,1,25(OH)2D3联合塞来昔布的协同作用可能意味着新的临床治疗策略。Objective To study the effect of celecoxib combined with 1,25 (OH)2D3 on the growth and VEGF of breast carcinoma in nude mice. Methods A total of 54 HS578T breast tumors nude mice were divided randomly into 9 treated groups ( n = 6 ) : normal sodium group ( A), doxorubicin group ( 1.75 mg/kg, B), celecoxib group (30 mg/kg, C ), the low dose 1,25 (OH) 2 D3 group (0.4 μg/kg, D), the middle dose 1,25 (OH) 2 D3 group ( 0.8 μg/kg, E) and the high dose 1,25 ( OH ) 2 D3 group ( 1.6 μg/kg, F) , celecoxib combined with low dose 1,25 ( OH ) 2 D3 group ( G ) , celecoxib combined with middle dose 1,25 ( OH ) 2 D3 group (H) , and combined with high dose 1,25 (OH)2D3group(I).Results The tumor volume ( mm3) was:1756.52±254.80,563.63±100.65, 1000.10±180.07, 1 175.47± 91.27,1 107.63 ± 209.18, 980.74 ± 163.22, 927.27 ± 172.54, 881.81 ± 127.22, and 636.36 ± 109.42 respectively in each group. The rate of tumor inhibition was 0 in group A, 69.52% in group B, 44.80% in group C, 36.04% in group D, 39.71% in group E, 46.62% in group F, 49.51% in group G, 53.23% in group%, and 65.32% in group I. The COX -2 expression was significantly inhibited by eelecoxib ( P 〈 0.05 ). The VDR expression was significantly increased after treated by 1,25 (OH) 2 D3 ( P 〈 0.05 ) ; the expression of VEGF and COX - 2 was suppressed by celeeoxib alone or joined to 1,25 (OH) 2 D3, 1,25 (OH) 2 D3 which up - regulated the expression of VDR ( P 〈 0. 05 ). Conclusion 1,25 (OH)2D3 could inhibit breast tumor growth in a dose - depended manner in nude mice. Celecoxib enhances the antitumor activities in vivo combined with 1,25 (OH)2 D3- The synergistic effect of two drugs on blocking angiogenesis and suppressing tumor growth suggests a novel application in the treatment of breast cancer.
关 键 词:乳腺癌 1 25-二羟维生素D3 环氧化酶-2抑制剂
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