慢性髓性白血病一种新剪接体ABL^△exon7+35INS  被引量:1

Discovery of a novel spliceosome of ABL gene (ABL^△exon7+35INS) and its association with TKIs resistance in chronic myeloid leukemia

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作  者:潘杰[1] 覃艳红[1] 赵俊霞[1] 陈秀花[1] 徐智芳[1] 许晶[1] 常建梅[1] 薛凤[1] 张娜[1] 任方刚[1] 张耀方[1] 王晓娟[1] 王宏伟[1] 

机构地区:[1]山西医科大学第二医院血液病研究所、血液病分子诊疗山西省重点实验室,太原030001

出  处:《中华血液学杂志》2016年第6期503-506,共4页Chinese Journal of Hematology

基  金:国家自然科学基金(81400139);山西省高等学校科技创新项目(20141107);山西省回国留学人员重点科研资助项目(2015.重点5);山西省基础研究项目(2013021034-3)

摘  要:目的探讨ABL基因的剪接体ABL^△exon7和ABL^35INS是否与酪氨酸激酶抑制剂(TKI)耐药的发生有关。方法采用聚丙烯酰胺凝胶电泳法结合PCR扩增产物直接测序法,检测74名健康人和76例慢性髓性白血病(CML)患者(TKI治疗有效组53例,耐药组23例)ABL^△exon7和ABL^35LNS剪接体的发生率。结果发现并鉴定一种新的剪接体ABL^△exon7+35INS(ABL^△exon7和ABL^35INS剪接体同时存在),在健康对照组、TKI治疗有效组和耐药组检出率分别为10.8%(8/74)、7.5%(4/53)和8.7%(2/23)。74名健康对照者中47名(63.5%)表达ABL^△exon7剪接体,8名(10.8%)表达ABLINS剪接体;53例TKI治疗有效的CML患者中30例(56.6%)表达ABL“””剪接体,5例(9.4%)表达ABL””剪接体;23例发生耐药的CML患者中12例(52.2%)表达ABL^△exon7剪接体,3例(13.0%)表达ABLINS剪接体,比较以上各组结果,差异均无统计学意义(P值均〉0.05)。结论新剪接体ABL^△exon7+35INS和ABL^35INS与TKI治疗发生耐药无关,同时发现ABL^35INS剪接体的发生往往会伴随外显子7的缺失。Objective To explore whether the ^△exon7 and ABL^35INS spliceosome contributed to TKIs resistance. Methods ScreeningABL^△exon7 and ABL^35LNSin 74 normal people and 76 CML patients (53 patients in remission and 23 patients with TKIs resistance) by using polyacrylamide gel electrophoresis combined with cloning sequencing. Results A novel spliceosome ABL~~x~~7+35~s (ABL^△exon7 and ABL^35LNSexisted at the same time) was identified and the mutation was detected in 8 (10.8%) of 74 normal people, 4 (7.5%) of 53 remission patients and 2 (8.7%) of 23 resistant patients. While 47 (63.5%) cases expressed ^△exon7 and 8 (10.8%) eases expressed ABL35rNs in 74 healthy people, 30 (56.6%) cases expressed ^△exon7 and 5 (9.4%) cases expressed ABL35INs in 53 remission patients, 12 (52.2%) cases expressed ABLa^x^7 and 3 (13.0%) cases expressed ABL351Ns in 23 resistant patients. Three kinds of spliceosome in all groups had no statistical difference. Conclusion ABL△exon7 + 35INs, ABL^xexon7 and ABL35rNs may be not uncommon in ABL gene and were unrelated to resistance in CML with TKIs treatment. ABL^35LNS were often accompanying with exon 7 deletion.

关 键 词:剪接体 酪氨酸激酶抑制剂 耐药 白血病 髓系 慢性 BCR—ABL阳性 ABL^△exon7+35INS 

分 类 号:R733.72[医药卫生—肿瘤]

 

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