目的:探讨我国东北地区伊马替尼耐药的慢性粒细胞白血病（CML）和费城染色体阳性急性淋巴细胞白血病（Phn + ALL）患者BCR-ABL1激酶区突变的特征及其对预后的影响。n 方法:回顾性分析2013年1月至2018年10月就诊于吉林大学第一医院的252例CML患者和49例Phn + ALL患者的临床资料，患者均在伊马替尼治疗效果不佳时采集骨髓或者外周血标本。应用巢式聚合酶链反应（PCR）扩增BCR-ABL1激酶区，应用Sequencing Analysis v5.4软件分析BCR-ABL1激酶区突变。随访6~48个月，进行生存分析。n 结果:252例CML患者中57例（22.6%）检测出BCR-ABL1激酶区突变，其中25例处于慢性期，21例处于加速期，11例处于急变期；50例患者存在20种类型单一点突变，最常见的类型为E255K（16.0%，8/50）、T315I（14.0%，7/50）、M244V（8.0%，4/50）、G250E（8.0%，4/50），突变位点主要集中在P-loop和C-helix区；7例患者存在双重突变；发生多重突变的患者预后最差，中位总生存（OS）时间3.2个月。49例Phn + ALL患者中17例（34.7%）检测出BCR-ABL1激酶区突变，其中14例患者存在12种类型单一点突变，3例患者存在多重突变；多重突变、突变位于P-loop和C-helix区、突变位于其他区域患者的中位OS时间分别为2.0、8.0、18.0个月，3组患者OS差异有统计学意义（n P<0.01）。n 结论:我国东北地区伊马替尼耐药的CML和Phn + ALL患者中，发生于P-loop和C-helix区的点突变最为常见。多重突变、发生在P-loop和C-helix区的突变与患者不良预后相关。n “,”Objective:To explore the characteristics of BCR-ABL1 kinase domain mutations in imatinib-resistant chronic myelogenous leukemia (CML) and Philadelphia chromosome-positive acute lymphoblastic leukemia (Phn + ALL) patients from Northeast China and their impact on prognosis.n Methods:The clinical data of 252 CML patients and 49 Phn + ALL patients who were admitted to the First Hospital of Jilin University from January 2013 to October 2018 were retrospectively analyzed. The samples of bone marrow or peripheral blood were collected from patients when imatinib treatment was not effective. Nested polymerase chain reaction (PCR) was used to amplify the BCR-ABL1 kinase domain, and Sequencing Analysis v5.4 software was used to analyze the mutation of BCR-ABL1 kinase domain. Patients were followed up for 6-48 months, and the survival analysis was performed.n Results:Among 252 CML patients, the mutations in ABL1 kinase domain were found in 57 patients (22.6%), including 25 patients in the chronic phase, 21 patients in the accelerated phase and 11 patients in the blast crisis; 50 patients had 20 types of single point mutation, and the most common mutation types were E255K (16.0%, 8/50), T315I (14.0%, 7/50), M244V (8.0%, 4/50) and G250E (8.0%, 4/50), which were all concentrated in the P-loop and C-helix domains; 7 patients had double mutations; patients with multiple mutations had the worst prognosis, with a median overall survival (OS) time of 3.2 months. Among 49 Phn + ALL patients, 17 cases (34.7%) were positive for mutations in the BCR-ABL1 kinase domain, 14 patients had 12 types of single point mutation, and 3 patients had multiple mutations; the median OS time of patients with multiple mutations, mutations located in the P-loop and C-helix domains and mutations located in the other domains was 2.0, 8.0 and 18.0 months, and the difference in OS among the three groups was statistically significant (n P < 0.01).n Conclusions:Among the imatinib-resistant CML and Phn + ALL patients from Northeast China, point mutations in the P-loop and C-helix domains are most commonly found. Multiple mutations, mutations in the P-loop and C-helix domains are related to the poor prognosis of the patients.n