Objective: To investigate the distribution characteristics of LymphGen genotyping in a diffuse large B-cell lymphoma (DLBCL) population and verify its prognostic value. Methods: We collected the clinical data and paraffin-embedded tumor tissue samples of 155 patients with newly diagnosed DLBCL in the People's Hospital of Xinjiang Uygur Autonomous Region from June 2014 to December 2020. DNA was extracted from tumor tissue and 475 gene mutations were detected by next-generation sequencing technology. We investigated the distribution of LymphGen genotyping in the DLBCL population, patients with different COO genotypes in the Xinjiang region, and their effects on PFS and OS. Results: ①Among 155 patients, 105 patients (67.7%) could be genotyped, including 14 (9.0%) for MCD, 26 (16.8%) for BN2, 10 (6.5%) for N1, 8 (5.2%) for EZB, 27 (17.4%) for A53, and 20 (12.9%) for ST2. ②The distribution of each gene subtype was different in different cell origin (COO) types (P=0.021) . ST2 was dominant in the germinal center type (GCB) group (28.8%) , and A53 and MCD were dominant in the non-GCB group (35.8%, 17.0%) . The BN2 type was the most common in both groups (23.1%, 26.4%) . ③There were statistically significant differences in progression-free survival (PFS) and overall survival (OS) among different gene subtypes (P=0.031 and 0.005, respectively) . N1 and A53 had poor prognosis. The 2-year PFS and OS rates of N1 were both (21.3±18.4) %, and the 3-year PFS and OS rates of A53 were (60.9±11.3) %, (46.8±10.9) %, respectively. ④ The 3-year PFS and OS rates of MCD were the best, but the 5-year PFS and OS rates were worse. ⑤In the ROC curve of LymphGen genotyping for OS prediction, the AUC was 0.66, showing a certain degree of differentiation. Conclusion: LymphGen genotyping in the DLBCL population was different from previous reports and was of great significance for the prognosis of patients with DLBCL.
目的： 了解LymphGen基因分型在弥漫大B细胞淋巴瘤（DLBCL）人群中的分布特征并验证其预后价值。 方法： 收集2014年6月至2020年12月在新疆维吾尔自治区人民医院资料完整155例初诊DLBCL患者的临床资料及石蜡包埋肿瘤组织标本，从肿瘤组织中提取DNA，应用二代测序技术检测475种基因突变情况，研究LymphGen基因分型在新疆DLBCL人群及不同细胞起源（COO）分型患者中的分布情况及对无进展生存（PFS）及总生存（OS）的影响。 结果： ①155患者中105例（67.7%）能进行基因分型，其中MCD型14例（9.0%），BN2型26例（16.8%），N1型10例（6.5%），EZB型8例（5.2%），A53型27例（17.4%），ST2型20例（12.9%）。②各基因亚型在不同COO分型中分布不同（P=0.021），生发中心型（GCB）组中以ST2为主（28.8%），非生发中心型（non-GCB）组中以A53及MCD型为主（35.8%、17.0%），BN2型在两组中均较多分布（23.1%、26.4%）。③不同基因亚型PFS、OS差异有统计学意义（P值分别为0.031、0.005）：N1型2年PFS、OS率仅为（21.3±18.4）%，A53型3年PFS、OS率分别为（60.9±11.3）%、（46.8±10.9）%。④MCD型3年PFS、OS率最优，但5年PFS、OS率较差。⑤LymphGen基因分型预测OS的受试者工作特征曲线（ROC曲线）曲线下面积为0.66，具有一定的区分度。 结论： LymphGen基因分型在DLBCL人群中分布与以往报道有差异，LymphGen基因分型对DLBCL患者预后判断有一定价值。.
Keywords: Distribution; LymphGen genotyping; Lymphoma, large B-cell, diffuse; Next generation sequencing; Prognosis.