期刊文献+

长春花碱诱导TK6细胞tk位点杂合性丢失的研究

Analysis of Loss of Heterozygosity Induced by Vinblastine at tk Locus in Human Lymphoblastoid Cell Line TK6
下载PDF
导出
摘要 目的建立用人类淋巴母细胞TK 6检测纺锤体毒物——长春花碱的TK基因突变试验方法,同时探讨长春花碱的遗传毒性分子机理。方法使用长春花碱0.625 ng/mL、1.250 ng/mL、2.500 ng/mL和5.000 ng/mL对TK 6细胞染毒24 h,进行TK基因突变试验。检测细胞相对存活率(RS%)、相对悬浮增长率(RTG%)、tk位点突变频率(M F)和缓慢生长集落的百分比(SC%),同时对突变集落tk位点杂合性丢失(LOH)进行分析。结果随着长春花碱浓度的增加,TK 6细胞的相对存活率和相对悬浮增长率均降低,而tk位点突变频率逐渐增加,且有剂量反应关系。tk位点杂合性分析表明长春花碱诱发的突变集落中有96.4%为LOH丢失,其中半合子LOH为39.3%,纯合子LOH为57.1%。结论长春花碱可诱导TK 6细胞tk基因突变,主要以LOH为主。 Objective To establish TK gene mutation assay using human lymphoblastoid cell line TK6 and to study the genotoxic mechanism of Vinblastine(VBL). Methods TK6 cells were treated with Vinblastine at different concentrations (0.625 ng/mL, 1.250 ng/mL, 2.500 ng/mL and 5.000 ng/mL)for 24 h and TK gene mutation assay were experimented. Relative survival (RS%), relative suspension growth (RSG%), mutation frequency at tk locus and percentages of slow growth mutant (SC%) were detected and loss of heterozygosity (LOH) of mutants were analyzed. Results A decreased RS% and RSG% and an increased mutation frequency at tk locus were observed in a dose-dependent manner when the TK6 cells were treated with 0.625, 1.250, 2.500 and 5.000 ng/mL of Vinblastine respectively for 24 h. The result demenstrated that about 96.4% of Vinblastine-induced mutants were LOH. Among them, 39.3% were hemi-LOH and 57.1% were homo-LOH respectively. Conclusion TK6 cell line can be used to detect the genotoxicity of Vinblastine and LOH was the major mutation events in Vinblastine-induced mutants.
出处 《四川大学学报(医学版)》 CAS CSCD 北大核心 2006年第4期558-561,共4页 Journal of Sichuan University(Medical Sciences)
基金 国家自然科学基金(批准号30471473) 博士点基金(批准号20020610036)
关键词 长春花碱 TK6细胞 杂合性丢失 TK基因突变试验 Vinblastine TK6 cell Loss of herterozygosity TK gene mutation assay
  • 相关文献

参考文献9

  • 1Aardema MJ,Albertini S,Arni P.Aneuploidy:a report of an ECETOC task force,Mutat Res,1998;41(1):3-79.
  • 2Clive D,Voytek P.Evidence for chemically induced structural gene mutation at the thymidine kinase locus in cultured L5178Y mouse lymphoma cells.Mutat Res,1977;44(2):269-298.
  • 3Honma M,Sofuni T.The mouse lymphoma assay (MLA) using the microwell method.Genetic toxicology and cancer risk assessment.New York:Marcel Dekker Inc,2001:141-161.
  • 4Morimoto S,Kato T,Honma M,et al.Detection of genetic alterations induced by low-dose X-rays analysis of loss of heterozygosity for TK mutation in human lymphoblastoid cells.Radiation Research,2002;157(5):533-538.
  • 5刘辉,彭芝兰,王和,刘珊玲,张崇淑,唐茜萍,何斌.FHIT基因杂合性丢失及微卫星不稳定性与宫颈癌发生发展的关系[J].四川大学学报(医学版),2005,36(4):506-509. 被引量:4
  • 6Honma M,Momose M,Tanabe H,et al.Requirement of Wild-type p53 protein for maitenance of chromosomal integrity.Molecular Carcinogenesis,2000;28(4):203-214.
  • 7Knudson AGJr.Hereditary cancer,oncogenes,and antioncogenes.Cancer Res,1985;45(4):1437-1452.
  • 8Honma M,Momose M,Sakamoto H,et al.Spindle poisons induce allelic loss in lymphomacells through mitotic nondisjunction.Mutat Res,2001;493(1-2):101-114.
  • 9Amundson SA,Liber HL.A comparison of induced mutation at homologous alleles of the tk locus in human cells.Mutat Res,1991;247(1):19-31.

二级参考文献13

  • 1Ohta M, Inoue H, Cotticelli MG, et al. The FHIT gene,spanning the chromosome 3p14.2 fragile site and renal carcinoma-associated t(3;8)breakpoint,is abnormal in digestive tract cancer. Cell,1996;84(4):587.
  • 2Druck T, Berk L, Huebner K. FHITness and cancer. Oncol Res,1998;10(7):341.
  • 3Kiyoshi Y, Takayuki E, Takafumi N, et al. FHIT alterations in cancerous and non-cancerous cervical epithelium. Int J Cancer,2000;85:6.
  • 4Tomlinson I, Bodmer W. Selection, the mutation rate and cancer: ensuring that the tail does not wag the dog. Nat Med,1999;5(1):11.
  • 5Sia EA, Jinks-Robertson S, Petes TD. Genetic control of microsatellite stability. Mutat Res,1997;383(1):61.
  • 6Kiyoshi Y, Takayuki E, Takafumi N, et al. FHIT alterations in cancerous and non-cancerous cervical epithelium. Int J Cancer,2000;85:6.
  • 7Guo Z, Wu F, Asplund A, et al. Analysis of intratumoral heterogeneity of chromosome 3p deletions and genetic evidence of polyclonal origin of cervical squamous carcinoma. Mod Pathol,2001;14(2):54.
  • 8Kersemaekers AM, Hermans J, Fleuren GJ, et al. Loss of heterozygosity for defined regions on chromosomes 3, 11 and 17 in carcinomas of the uterine cervix. Br J Cancer,1998;77(2):192.
  • 9Kersemaekers AM,Kenter GG,Hermans J,et al.Allelic loss and prognosis in carcinoma of the uterine cervix.Int J Cancer,1998;79(4):411.
  • 10Birrer MJ, Hendricks D, Farley J, et al. Abnormal Fhit expression in malignant and premalignant lesions of the cervix. Cancer Res,1999;59(20):5270.

共引文献3

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部