目的探讨SAMD9L在弥漫大B细胞淋巴瘤(diffuse large B cell lymphoma,DLBCL)中的表达及临床意义。方法采用免疫组化EnVision法检测135例DLBCL中SAMD9L的表达,分析SAMD9L表达与DLBCL临床病理特征、治疗反应及总生存期(overall survival,...目的探讨SAMD9L在弥漫大B细胞淋巴瘤(diffuse large B cell lymphoma,DLBCL)中的表达及临床意义。方法采用免疫组化EnVision法检测135例DLBCL中SAMD9L的表达,分析SAMD9L表达与DLBCL临床病理特征、治疗反应及总生存期(overall survival,OS)之间的相关性。结果SAMD9L表达与患者年龄(P=0.049)、B症状(P=0.003)、国际预后指数(international prognostic index,IPI)评分(P=0.026)相关,其在年龄>60岁、有B症状以及高IPI评分患者中表达较高。但SAMD9L低表达组和高表达组患者在性别、结外累及、Hans分型、Ann Arbor分期、美国东部肿瘤协作组(Eastern Cooperative Oncology Group,ECOG)体能状态(performances status,PS)评分、Ki-67增殖指数、骨髓浸润、乳酸脱氢酶(lactate dehydrogenase,LDH)水平、白蛋白(albumin,ALB)水平以及治疗反应方面差异无显著性(P均>0.05)。Kaplan-Meier生存曲线分析显示,SAMD9L高表达组较低表达组的OS显著缩短(P<0.001)。单因素和多因素回归分析显示,SAMD9L表达水平是影响OS的相关因素,但非预后的独立影响因素(P=0.710)。结论SAMD9L在患者年龄>60岁、有B症状以及高IPI评分患者中表达较高。SAMD9L高表达组较低表达组的OS显著缩短,SAMD9L表达水平是影响DLBCL患者OS的相关因素,但非预后的独立影响因素。展开更多
Gliomas are the most commonly occurring tumors of the central nervous system. Glioblastoma multiforme (GBM) is the most malignant and aggressive brain cancer in adults. Further understanding of the mechanisms underlyi...Gliomas are the most commonly occurring tumors of the central nervous system. Glioblastoma multiforme (GBM) is the most malignant and aggressive brain cancer in adults. Further understanding of the mechanisms underlying the aggressive nature of GBM is urgently needed. Here we identified homeobox B8(HOXB8), a member of the homeobox family, as a crucial contributor to the aggressiveness of GBM. Data mining of publicly accessible RNA sequence datasets and our patient cohorts confirmed a higher expression of HOXB8 in the tumor tissue of GBM patients, and a strong positive correlation between the expression level and pathological grading of tumors and a negative correlation between the expression level and the overall survival rate. We next showed that HOXB8 promotes the proliferation and migration of glioblastoma cells and is crucial for the activation of the PI3K/AKT pathway and expression of epithelial–mesenchymal transition-related genes, possibly through direct binding to the promoter of SAMD9 (Sterile Alpha Motif Domain-Containing Protein 9) and activating its transcription. Collectively, we identified HOXB8 as a critical contributor to the aggressiveness of GBM, which provides insights into a potential therapeutic target for GBM and opens new avenues for improving its treatment outcome.展开更多
基金the National Natural Science Foundation of China(31571298).
文摘Gliomas are the most commonly occurring tumors of the central nervous system. Glioblastoma multiforme (GBM) is the most malignant and aggressive brain cancer in adults. Further understanding of the mechanisms underlying the aggressive nature of GBM is urgently needed. Here we identified homeobox B8(HOXB8), a member of the homeobox family, as a crucial contributor to the aggressiveness of GBM. Data mining of publicly accessible RNA sequence datasets and our patient cohorts confirmed a higher expression of HOXB8 in the tumor tissue of GBM patients, and a strong positive correlation between the expression level and pathological grading of tumors and a negative correlation between the expression level and the overall survival rate. We next showed that HOXB8 promotes the proliferation and migration of glioblastoma cells and is crucial for the activation of the PI3K/AKT pathway and expression of epithelial–mesenchymal transition-related genes, possibly through direct binding to the promoter of SAMD9 (Sterile Alpha Motif Domain-Containing Protein 9) and activating its transcription. Collectively, we identified HOXB8 as a critical contributor to the aggressiveness of GBM, which provides insights into a potential therapeutic target for GBM and opens new avenues for improving its treatment outcome.
