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內(nèi)皮素A受體拮抗劑在人喉癌種植瘤的實(shí)驗研究

摘要:目的: 探討選擇性內(nèi)皮素A受體拮抗劑BQ123對人喉癌Hep2細(xì)胞裸鼠種植瘤的生長及血管形成的影響。 方法 :將實(shí)驗動物裸鼠隨機(jī)分為3組:BQ123［n =8,2mg/(kg·day)］、氟尿嘧啶組［n =8,2mg/(kg·day)］、生理鹽水組(n =8),比較各組裸鼠成瘤體積、微血管密度(MVD)。 結(jié)果 :BQ123組腫瘤體積為(162±053)cm3,明顯小于生理鹽水組及氟尿嘧啶組,差異具有統(tǒng)計學(xué)意義;BQ123組的腫瘤組織中MVD高倍鏡下為232,明顯低于生理鹽水組(586)及氟尿嘧啶組(395),差異具有統(tǒng)計學(xué)意義。 結(jié)論 :BQ123對人喉癌Hep2細(xì)胞在裸鼠體內(nèi)有明顯抑瘤作用,腫瘤的體積、腫瘤組織MVD顯著低于對照組,表明BQ123可通過抑制腫瘤血管生成而顯著抑制腫瘤生長。Abstract: Objective: To study the effects of endothelin A receptor blockade BQ123 on the implanted human laryngeal carcinoma angiogenesis of nude mouse. Methods : From March 2008 to July 2009, 24 Balb/c nude mice were randomly divided into three groups: BQ123 group ［〖WTBX〗n =8, BQ123 at 2mg/(kg·day)］, 5Fu group ［〖WTBX〗n =8, fluorouracil at 2mg/(kg·day)］ and the control group (〖WTBX〗n =8, normal saline). The carcinoma volume and microvascular density of each group were compared. Results : The tumor size of BQ123 group, which was (162±053)cm3 in average, was significant smaller than the tumor sizes of the other two group s. The average microvascular density score of the tumors in BQ123 group was 232 per hyper power len (HP), which was also significantly less than the average scores of control groups (586 and 395 respectively). Conclusion : Nude mouse experiments show that the carcinoma volume and microvascular density of BQ123 group are significantly lower than those of the control groups. BQ123 inhibits the growth of carcinoma by its inhibition of carcinoma angiogenesis.