华西口腔医学杂志

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硫代反义Bcl-xL寡脱氧核苷酸对BcaCD885颊癌细胞凋亡及热敏感性的影响

何永文1,边 莉2,梁新华3   

  1. 1.昆明医学院口腔医学研究所,云南 昆明650032;2.昆明医学院第一附属医院,云南 昆明650032; 3.四川大学华西口腔医学院 口腔颌面外科教研室,四川 成都610041
  • 收稿日期:2004-04-25 修回日期:2004-04-25 出版日期:2004-04-20 发布日期:2004-04-20
  • 通讯作者: 何永文,Tel:0871-5338944
  • 作者简介:何永文(1971-),男,副教授,博士
  • 基金资助:
    云南省教育厅科学研究基金资助项目(0112444)

Effect of Phosphorothioate Antisense Bcl-xL Oligodeoxynucleotides on Apoptosis and Thermosensitivity of BcaCD885 Cells

HE Yong-wen1,BIANLi2,LIANG Xin-hua3   

  1. 1.Dept.ofStomatology Institute,The First Affiliated Hospital ofKunming Medical College,Kunming650032,China;2.The First AffiliatedHospital ofKunmingMedical College,Kunming650032,Chi- na;3.Dept.ofOral andMaxillofacial Surgery,West China College ofStomatology,Sichuan University,Chengdu610041,Chi- na
  • Received:2004-04-25 Revised:2004-04-25 Online:2004-04-20 Published:2004-04-20

摘要:

目的 探讨硫代反义Bcl-xL寡脱氧核苷酸(AS-sODN)对BcaCD885颊癌细胞凋亡及热敏感性的影响。方法 以脂质体Lipofectin为载体,转染AS-sODN于BcaCD885细胞内,倒置显微镜观察细胞形态学改变,TUNEL原位末端标记检测细胞凋亡,流式细胞技术(FCM)测定细胞凋亡率及Bcl-xL蛋白表达水平;转染AS-sODN于BcaCD885 细胞内,再以43℃,40 min加热细胞,FCM检测细胞凋亡率。结果 AS-sODN转染后,BcaCD885颊癌细胞出现皱缩、呈浮起状,TUNEL原位末端标记阳性,Bcl-xL蛋白表达明显下降(P<0·05),热诱导细胞凋亡率明显提高(P< 0·05)。结论 硫代反义Bcl-xL寡脱氧核苷酸能诱导BcaCD885颊癌细胞凋亡并能提高其热敏感性。

关键词: 反义寡脱氧核苷酸, Bcl-xL, BcaCD885细胞, 凋亡, 热敏感性

Abstract:

Objective To studythe effect of phosphorothioate antisense Bcl-xLoligodeoxynucleotides on apoptosis and thermo- sensitivity of BcaCD885 cells.Methods After phosphorothioate antisense Bcl-xL oligodeoxynucleotides were tranfected into BcaCD885 cells. The characteristics of apoptotic cellswere evaluated bymorphological observation andTUNELstaining. Apoptotic rate and Bcl-xL protein expression were analyzed with flow cytometry. The influence of phosphorothioate antisense Bcl-xL oligode- oxynucleotides on apoptotic rate of BcaCD885 cells induced by hyperthermiawith 43℃40 minwas also examined through flow cy- tometry.Results The BcaCD885 cells transfected with phosphorothioate antisense Bcl-xL oligodeoxynucleotides displayed apop- totic morphological features. The Bcl-xL protein expression level of these cells was down-regulated significantly compared with the controlled group (P<0.05). The apoptotic rate of these cells induced by hyperthermia was increased significantly compared with the controlled group (P<0.05).Conclusion Phosphorothioate antisense Bcl-xL oligodeoxynucleotides can induce apoptosis and improve thermosensitivity of BcaCD885 cells.

Key words: antisense oligodeoxynucleotides, Bcl-xL, BcaCD885 cells, apoptosis, thermosensitivity