介于弥漫大B 细胞淋巴瘤和伯基特淋巴瘤之间的未分类淋巴瘤

目的：分析介于弥漫大B 细胞淋巴瘤和伯基特淋巴瘤之间的未分类的B 细胞淋巴瘤（B-cell lymphoma ,unclassifiable,with features intermediate between DLBCL and Burkitt lymphoma,DLBCL/BL）的临床特点、治疗与预后,增加对该病的认识。方法：收集郑州大学第一附属医院2013年1 月至2014年12月收治的13例DLBCL/BL患者临床病理资料,采用Kaplan-Meier 法进行生存分析,采用Logrank 检验对临床分期、年龄、LDH 水平、IPI 评分、初治化疗方案等进行单因素分析。结果：13例患者中12例存在结外侵犯,13例患者的中位OS为10个月,中位PFS 为6 个月。单因素分析显示IPI 评分、LDH 水平与预后有统计学相关性,行CHOP、CHOP 样与高强度化疗方案患者之间生存差异具有统计学意义（P = 0.054）。 结论：DLBCL/BL恶性程度高,生存期短,结外侵犯多见,对CHOP 及CHOP 样方案治疗反应差,高强度化疗可能改善预后,IPI 评分≥ 3 分及 LDH 升高是其不良预后因素。     

Burkitt lymphoma versus diffuse large B‐cell lymphoma: a practical approach

Burkitt Lymphoma (BL) is listed in the World Health Organization (WHO) classification of lymphoid tumours as an “aggressive B‐cell non‐Hodgkin's lymphoma”, characterized by a high degree of proliferation of the malignant cells and deregulation of the c‐MYC gene. The main diagnostic challenge in BL is to distinguish it from diffuse large B‐cell lymphoma (DLBCL). While in children BL and DLBCL types probably do not differ clinically, and the differential diagnosis between BL and DLBCL may theoretically appear clear‐cut, in adults daily practice shows the existence of cases that have morphological features, immunophenotypic and cytogenetics intermediate between DLBCL and BL, and cannot be classified with certainty in these categories. Distinguishing between BL and DLBCL is critical, as the two diseases require different management. This review summarizes the current practical approach, including the use of a large panel of antibodies, and cytogenetic and molecular diagnostic techniques, to distinguish between BL, DLBCL and the provisional category of “B‐cell lymphoma, unclassificable, with features intermediate between diffuse large B‐cell lymphoma and Burkitt lymphoma”, now listed in the updated WHO classification. Copyright © 2009 John Wiley & Sons, Ltd.     

Burkitt lymphoma versus diffuse large B‐cell lymphoma: a practical approach

Burkitt Lymphoma (BL) is listed in the World Health Organization (WHO) classification of lymphoid tumours as an ‘aggressive B‐cell non‐Hodgkin's lymphoma’, characterized by a high degree of proliferation of the malignant cells and deregulation of the c‐MYC gene. The main diagnostic challenge in BL is to distinguish it from diffuse large B‐cell lymphoma (DLBCL). While in children BL and DLBCL types probably do not differ clinically, and the differential diagnosis between BL and DLBCL may theoretically appear clear‐cut, in adults daily practice shows the existence of cases that have morphological features, immunophenotypic and cytogenetics intermediate between DLBCL and BL, and cannot be classified with certainty in these categories. Distinguishing between BL and DLBCL is critical, as the two diseases require different management. This review summarizes the current practical approach, including the use of a large panel of antibodies, and cytogenetic and molecular diagnostic techniques, to distinguish between BL, DLBCL and the provisional category of ‘B‐cell lymphoma, unclassifiable, with features intermediate between diffuse large B‐cell lymphoma and Burkitt lymphoma’, now listed in the updated WHO classification. Copyright © 2009 John Wiley & Sons, Ltd.     

Prognostic significance of MYC, BCL2, and BCL6 rearrangements in patients with diffuse large B-cell lymphoma treated with cyclophosphamide, doxorubicin, vincristine, and prednisone plus rituximab

BACKGROUND:

Diffuse large B‐cell lymphomas (DLBCLs) are a biologically heterogeneous group in which various gene alterations have been reported. The aim of this study was to investigate the frequency and prognostic impact of BCL2, BCL6, and MYC rearrangements in cyclophosphamide, doxorubicin, vincristine, and prednisone plus rituximab (R‐CHOP)‐treated DLBCL cases.

METHODS:

Tissue microarrays were constructed from 239 cases of DLBCL, and the expressions of CD10, BCL6, MUM1/IRF4, and BCL2 were evaluated by immunohistochemistry. MYC, BCL2, and BCL6 rearrangements were investigated by interphase fluorescence in situ hybridization on tissue microarrays. Survival analysis was constructed from 145 R‐CHOP–treated patients.

RESULTS:

MYC, BCL2, and BCL6 rearrangements were detected in 14 (6%), 36 (15%), and 69 (29%) of 239 DLBCL patients. Double or triple rearrangements were detected in 7 (3%) of 239 DLBCL cases. Of these, 4 had BCL2 and MYC, 2 had BCL6 and MYC, and 1 had BCL2, BCL6, and MYC rearrangements. The prognosis of these cases was extremely poor, with a median survival of 9 months. MYC rearrangement was associated with significantly worse overall survival (P = .01), especially for the cases with GC phenotype (P = .009). BCL6 rearrangement also predicted significantly shorter overall survival (P = .04), especially for the non‐GC phenotype (P = .03). BCL2 rearrangement had no prognostic impact on outcome. International Prognostic Index (P = .004) and MYC rearrangement (P = .009) were independent poor prognostic factors.

CONCLUSIONS:

Analysis of MYC gene rearrangement along with BCL2 and BCL6 is critical in identifying high‐risk patients with poor prognosis. Cancer 2012. © 2011 American Cancer Society.     

弥漫性大B细胞淋巴瘤C-MYC基因异常分析

  目的   探讨弥漫性大B细胞淋巴瘤(DLBCL) MYC基因异常情况及其与BCL-2、BCL-6基因异常的关系。   方法   应用组织芯片和FISH技术对194例DLBCL的MYC、BCL-2、BCL-6基因异常情况进行检测, 并用免疫组织化学法检测CD10、BCL-6、MUM-1及Ki-67等蛋白标记物, 分析其相互关系。   结果   在164例MYC基因异常为38例(23.17%), 其中基因易位9例(5.49%), 基因扩增29例(17.68%); 同时存在MYC和BCL-6基因易位有2例, 未发现MYC和BCL-2同时易位或三者同时易位的病例; 资料完整(同时获得三种基因FISH结果) 的159例病例中, MYC基因扩增28例(17.61%) 与BCL-2基因扩增38例(23.90%) 呈显著正相关(r=0.291 6, P=0.000 4);MYC基因易位病例Ki-67高表达率(5/8, 62.50%) 明显高于非MYC基因易位病例(33/149, 22.15%, P=0.027 7), 2例MYC和BCL-6同时易位的病例均为Ki-67高表达, MYC基因扩增与Ki-67高表达无显著相关性。   结论   有关MYC基因在弥漫性大B细胞淋巴瘤中的异常改变除基因重排外, 还有基因扩增等活化方式, 目前对其作用机制尚缺乏了解, 值得进行深入研究。      

p53和MYC在弥漫性大B细胞淋巴瘤组织中的表达及与患者预后的相关性

目的:分析弥漫性大B细胞淋巴瘤（diffuse large B-cell lymphoma,DLBCL)组织中p53和MYC的表达及与DLBCL患者预后的相关性。方法:分析我院收诊确认的149例DLBCL患者，应用Kaplan-Meier法计算生存率；并通过免疫组化法分析瘤组织中p53和MYC表达量，并采用单因素和Cox多因素分析MYC、p53表达与患者预后的相关性。结果:MYC基因的表达和患者年龄、性别以及BCL2/BCL6表达没有统计学差异；但MYC重组导致患者IPI指数较高、疾病分期较晚、乳酸脱氢酶（LDH）水平升高、p53表达升高（均P＜0.05)。生存率分析和Cox回归分析发现，MYC高表达患者中p53表达升高具有较差的预后（IPI指数较高）:生存期（OS）和无进展生存期（PFS）较差。 结论:p53和MYC高表达的协同作用导致DLBCL患者的预后较差。     

Prognostic impact of extranodal involvement in diffuse large B-cell lymphoma in the rituximab era

BACKGROUND:

Extranodal involvement is considered a poor prognostic factor for patients with diffuse large B‐cell lymphoma (DLBCL); however, the prognostic impact of specific sites of involvement has not been fully elucidated.

METHODS:

The authors retrospectively analyzed 1221 patients treated uniformly with standard R‐CHOP therapy between 2003 and 2006. Patients with distinct forms of DLBCL such as intravascular lymphoma, primary effusion lymphoma, pyothorax‐associated lymphoma, primary central nervous system lymphoma, and intraocular lymphoma were also excluded. The authors evaluated 26 extranodal sites of involvement with respect to prognostic impact. The median age was 64 years (range, 15‐91 years).

RESULTS:

Univariate analysis revealed that patients with involvement of specific extranodal sites had significantly worse overall survival (OS) than did patients without such involvement; these sites included nasal cavity, paranasal sinus, lung, pleura, small intestine, peritoneum, liver, pancreas, stomach, spleen, adrenal gland, testis, bone, bone marrow, peripheral blood, skin, and subcutaneous tissue. Patients with Waldeyer ring involvement had significantly better OS. Multivariate analysis revealed that patients with the involvement of the pleura (P < .001), small intestine (P = .015), peritoneum (P = .002), adrenal gland (P < .001), testis (P = .005), bone marrow (P < .001), and peripheral blood (P = .002) had significantly worse OS, whereas those with Waldeyer ring involvement had significantly better OS (P = .038). Subgroup analysis with the nodal and/or Waldeyer patient group also showed prognostic impact of Waldeyer ring by multivariate analysis (relative risk, 0.3; P = .04).

CONCLUSIONS:

Extranodal involvement affects the prognosis of patients undergoing R‐CHOP therapy for DLBCL. Cancer 2012. © 2011 American Cancer Society.     

Hematopoietic stem cell transplantation for diffuse large B‐cell lymphoma having 8q24/MYC rearrangement in Japan

The prognosis of diffuse large B‐cell lymphoma (DLBCL) having MYC rearrangement (MYC‐R), including double hit lymphoma (DHL), is poor by standard immunochemotherapy. To evaluate the significance of hematopoietic stem cell transplantation (SCT) for DLBCL with MYC‐R, we retrospectively analyzed Japanese SCT registry data. In total, 54 patients with DLBCL with MYC‐R were identified from 4336 registered adult DLBCL patients. Detailed clinical and cytogenetic information was obtained for 48 patients. The median age at diagnosis of the 48 patients was 54.5 (range 21–67) years. Twenty‐six (54%) patients had MYC‐R only (single hit), and 22 (46%) had MYC‐R and BCL2, and/or BCL6 rearrangement (double/triple hit). In 12 patients who received auto‐SCT during the first complete response (CR), both the 2‐year overall survival (OS) and progression‐free survival (PFS) rates were 75.0% (95% confidence interval [CI], 40.8%–91.2%). In 20 patients who received auto‐SCT after relapsed or refractory state, the 2‐year OS and PFS rates were 68.2% (95% CI, 41.9%–84.5%) and 59.6% (95% CI, 35.1%–77.4%), respectively. In 17 patients who received allo‐SCT, only 4 patients underwent SCT in CR. The 2‐year OS and PFS rates were 29.4% (95% CI, 10.7%–51.1%) and 17.6% (95% CI, 4.3%–38.3%), respectively. The rate of non‐relapse mortality at 1 year was 41.2% (95% CI, 17.1%–64.0%) in this group. The outcomes of single hit and double or triple hit were not different. These findings suggest that auto‐SCT may be effective for MYC‐R DLBCL, including DHL patients of chemosensitive relapsed or refractory state. Since most patients received allo‐SCT not in CR, the outcome of allo‐SCT was unsatisfactory due to high non‐relapse mortality and early relapse. To clarify the role of allo‐SCT for MYC‐R DLBCL, further accumulation of patients is necessary.     

白蛋白与纤维蛋白原的比值预测弥漫大B细胞淋巴瘤患者预后的价值

目的:探讨血清白蛋白（albumin，ALB）与血浆纤维蛋白原（fibrinogen，FIB）的比值（ALB to FIB ratio，AFR）对弥漫大B细胞淋巴瘤（diffuse large B-cell lymphoma，DLBCL)患者预后的影响。方法:选择我院2015-04-17至2022-03-18确诊的DLBCL病例59例，收集所有患者首次化疗前1周内的血清ALB值、血浆FIB值，计算出AFR。应用生存分析研究AFR对DLBCL患者无进展生存率(progression free survival，PFS)的影响。应用受试者工作特征曲线(receiver operating characteristic curve,ROC)下的面积（area under the ROC curve,AUC）来评估各模型对DLBCL患者预后预测能力的大小。结果:AFR范围3.87～20.13，中位数11.16。AFR与IPI、Ann Arbor分期、结外侵犯数以及B症状密切相关。Kaplan-Meier生存分析提示，AFR增高时，DLBCL患者的PFS显著提高（P＜0.001），2年累积PFS与低AFR组患者相比提高了73.0%。Cox单因素分析提示，低AFR的DLBCL患者发生肿瘤进展或死亡的风险显著增加（P=0.002）；多因素分析提示，AFR是影响DLBCL患者PFS的独立因素（P=0.004）。国际预后指数（international prognostic index，IPI）和IPI联合AFR两种模型判断DLBCL患者PFS的AUC值分别为0.778（95%CI 0.659～0.897,P＜0.001）和0.829（95%CI 0.723～0.935,P＜0.001）。结论:AFR是判断DLBCL患者PFS的独立预测因子，IPI联合AFR能够更好地判断DLBCL患者的预后。     

MYC translocation and/or BCL 2 protein expression are associated with poor prognosis in diffuse large B‐cell lymphoma

Genomic alterations and protein expression levels have been established as prognostic factors for survival in patients with diffuse large B‐cell lymphoma (DLBCL). In particular, double‐hit DLBCL (DHL), which exhibits translocations in MYC and BCL2 and/or BCL6, is known to be associated with a poor prognosis. However, the clinical significance of gene alterations and protein expression levels for MYC, B‐cell lymphoma (BCL)2, and BCL6 are unclear. In this study, we analyzed 61 adult patients diagnosed with DLBCL without DHL, who were treated with rituximab, cyclophosphamide, doxorubicin, vincristine, and prednisolone, or similar regimens. There were no differences in the distribution of MYC expression rates among the different MYC gene statuses. In log–rank tests, MYC translocation was a prognostic factor for overall survival (OS; P = 0.011), whereas BCL2 and BCL6 translocation were not prognostic indicators (P = 0.999 and P = 0.925, respectively). Although the expression levels of MYC and BCL6 were not significantly associated with OS, the expression of BCL2 was a prognostic factor for OS (P = 0.027). Furthermore, copy number gains in the MYC, BCL2, and BCL6 genes did not affect OS. MYC translocation (hazard ratio, 4.769; range, 1.518–14.98; P = 0.007) and BCL2 protein expression (hazard ratio, 3.072; range, 1.002–9.413; P = 0.049) were independent prognostic factors for survival in multivariate analyses. In conclusion, MYC translocation and BCL2 expression may need to be investigated at the initial diagnosis to predict prognosis in patients with DLBCL.     

MYC在弥漫大B细胞淋巴瘤的表达及其临床意义

目的 探讨MYC在弥漫大B细胞淋巴瘤（diffuse large B-cell lymphoma,DLBCL）中的表达及其与预后的关系。方法 回顾性分析广西医科大学附属肿瘤医院2011年2月至2018年8月收治的220例弥漫大B细胞淋巴瘤患者的临床资料。采用免疫组织化学法检测MYC蛋白在DLBCL组织中的表达,并分析其与患者临床病理特征及预后的关系。检索GEO（gene expression omnibus）数据库中有生存资料和基因表达数据的DLBCL数据集,分析MYC基因表达与预后的关系。结果 220例DLBCL组织中MYC蛋白阳性表达率为18.64%,MYC蛋白表达阳性患者总生存期（overall survival,OS）及无进展生存期（progress-free survival,PFS）较阴性表达患者明显缩短（P＜0.001）。亚组分析显示,在GCB免疫亚型中,MYC蛋白表达阳性患者较阴性患者OS明显缩短（P＜0.001）;在non-GCB免疫亚型中,MYC蛋白表达阳性患者较阴性患者的OS及PFS明显缩短（P＜0.001）。Cox比例风险回归模型分析结果显示,MYC蛋白阳性表达是影响DLBCL患者预后的独立危险因素（P<0.01）。GEO数据库中数据集GSE10846分析结果显示MYC基因高表达患者OS明显著缩短（P＜0.01）。结论 MYC蛋白阳性表达的DLBCL患者预后较差。     

U-2940, a human B-cell line derived from a diffuse large cell lymphoma sequential to Hodgkin lymphoma

Several patterns of association between Hodgkin and non-Hodgkin lymphomas are recognized, some of which support a common cellular origin or shared transformation events for both malignancies. We describe the U-2940 cell line derived from a diffuse large B-cell lymphoma with some features consistent with mediastinal large B-cell lymphoma, clinically apparent 1 month after the initial course of chemotherapy for Hodgkin's disease, fulfilling the criteria for composite malignancies. U-2940 cells display a mature B phenotype with hypermutated IgH rearrangement typical of germinal/postgerminal center origin. The cell line is negative for Epstein-Barr virus and no evidence of t(14;18) was found. U-2940 cells display multiple chromosomal rearrangements similar to recurrent aberrations described in both Hodgkin and non-Hodgkin lymphomas, also partially shared by U-2932 derived from a B-cell lymphoma sequential to Hodgkin's disease. The original large B-cell lymphoma and the U-2940 cell line bear microsatellite instability, an abnormality associated with particular subtypes of non-Hodgkin lymphomas and found in tissues involved by Hodgkin lymphoma. Therefore, U-2940 cells bear several features known to occur in Hodgkin and in non-Hodgkin lymphomas, leading to the assumption that this cell line may constitute a useful tool to address elective pathways of lymphomagenesis and eventually the Hodgkin and non-Hodgkin lymphoma association.     

Comparison of peripheral T-cell lymphomas and diffuse large B-cell lymphoma

BACKGROUND: Peripheral T-cell lymphomas (PTCLs) are a biologically heterogeneous subgroup of lymphomas with poor prognosis. In this study, the authors analyzed the clinical behaviors of PTCLs and diffuse large B-cell lymphoma (DLBCL). METHODS: The authors compared the characteristics and outcomes of 59 patients with PTCLs, including 33 angioimmunoblastic T-cell lymphomas and 26 unspecified peripheral T-cell lymphomas, with the characteristics and outcomes of 193 patients with DLBCLs who were treated in the era before rituximab. RESULTS: Based on the clinical characteristics, elevated lactate dehydrogenase (LDH), poor PS, advanced stage, higher International Prognostic Index score, and B symptoms were more common in patients with PTCLs, and bulky mass was more common in patients with DLBCL. The rates of complete response (CR) or an unconfirmed CR (CRu) were higher in patients with DLBCL (72%) than in patients with PTCLs (56%; P = .03). The 5-year overall survival (OS), progression-free survival (PFS), and disease-free survival (DFS) rates were 31%, 26%, and 47%, respectively, in patients with PTCLs and 59%, 55%, and 73%, respectively, in patients with DLBCL (P = .001, P < .001, and P = .003, respectively). Although multivariate analysis identified several risk factors that were significant in PTCLs, but not in DLBCLs, for the CR/CRu, OS, PFS, and DFS rates, the immunophenotype was not identified as a risk factor. CONCLUSIONS: The poor response and survival of patients who had PTCLs, compared with patients who had DLBCL, was caused by numerous initial risk factors. T-cell phenotype itself did not appear to have a significant impact on either response or survival.     

PD‐L1 expression is low in large B‐cell lymphoma with MYC or double‐hit translocation

In large B‐cell lymphoma (LBCL), MYC translocation and MYC/BCL2 or MYC/BCL6 double hit (DH) are associated with poor prognosis, and there is an unmet need for novel treatment targets in this patient group. Treatments targeting the PD‐L1/PD‐1 pathway are still poorly elucidated in LBCL. PD‐L1 expression might predict response to treatment targeting the PD‐L1/PD‐1 pathway. We therefore investigated the relationship between PD‐L1 protein and mRNA expression levels and MYC and DH translocation in LBCL. We detected MYC, BCL2, and BCL6 translocation by fluorescent in situ hybridization in tissue samples from 130 patients randomly selected from two cohorts of patients with LBCL: 49 patients with MYC translocation of whom 36 had DH and 81 without MYC translocation. PD‐L1 protein expression was detected by immunohistochemistry (IHC) in tissue samples from 77 patients and PD‐L1 mRNA expression by next‐generation RNA sequencing (NGS) in another 77 patients. Twenty‐four patients overlapped, ie, were analysed with both IHC and NGS. Nonparametric tests were performed to evaluate intergroup differences. PD‐L1 protein expression level was significantly lower in patients with MYC (n = 42, median = 3.3%, interquartile range [IQR] 0.0‐10.8) or DH translocations (n = 31, median = 3.3%, IQR 0.0‐10.0) compared with patients with no MYC (n = 35, median = 16.7%, IQR 3.3‐30.0) or no DH translocations (n = 46, 13.3%, IQR 2.5‐30.0), P = .004 and P ≤ .001, respectively. PD‐L1 mRNA expression was also significantly lower in patients with MYC or DH translocations, P = .001 and P = .006, respectively. Higher PD‐L1 protein and mRNA expression levels were associated with non–germinal centre (GC) type compared with germinal centre B‐cell (GCB)‐type diffuse LBCL (DLBCL), P = .004 and P = .002, respectively. In conclusion, we report an association between low PD‐L1 expression and MYC and DH translocation in patients with LBCL. Our findings may indicate that patients with MYC or DH translocation may benefit less from treatment with PD‐L1/PD‐1‐inhibitors compared with patients without these translocations. This should be evaluated in larger, prospective, consecutive trials.     

Limited-stage diffuse large B-cell lymphoma treated with abbreviated systemic therapy and consolidation radiotherapy: involved-field versus involved-node radiotherapy

BACKGROUND:

For limited‐stage diffuse large B‐cell lymphoma (DLBCL), treatment decisions are often influenced by toxicity profiles. One strategy that minimizes chemotherapy‐induced toxicities is abbreviated chemotherapy plus consolidation involved‐field radiotherapy (IFRT). Involved‐node radiotherapy (INRT) is a new concept to DLBCL, aimed to reduce radiotherapy‐induced toxicities. We retrospectively review the long‐term outcomes of limited‐stage DLBCL treated with abbreviated systemic therapy and radiotherapy focusing on field size: IFRT versus INRT.

METHODS:

The British Columbia Cancer Agency Lymphoid Cancer Database was used to identify patients diagnosed with limited‐stage DLBCL (stage I/II, without B‐symptoms; bulk < 10 cm) from 1981 to 2007. Patients were prescribed 3 cycles of chemotherapy plus IFRT (1981‐1996) or INRT≤5 cm (1996‐2007), defined as INRT to the prechemotherapy involved nodes with margins ≤ 5 cm.

RESULTS:

A total of 288 patients were identified: 56% were aged >60 years, 34% had stage II disease, 55% had extranodal disease, 19% had elevated lactate dehydrogenase levels, and 15% received rituximab. The two radiotherapy groups were IFRT (138 patients; 48%) and INRT≤5cm (150 patients; 52%); median follow‐up was 117 and 89 months, respectively. Distant relapse was the most common site of failure in both groups. After INRT≤5 cm, marginal recurrence was infrequent (2%). Time to progression (P = .823), progression‐free survival (P = .575), and overall survival (P = .417) were not significantly different between the radiotherapy cohorts. Radiotherapy field size was not a significant prognostic factor on multivariate analyses.

CONCLUSIONS:

This research is the first known body of work to apply the concept of INRT to limited‐stage DLBCL. Reducing the field size from IFRT to INRT≤5 cm maintains a low marginal recurrence risk with no impact on overall outcome. Cancer 2012. © 2012 American Cancer Society.     

感染HBV的弥漫大B细胞淋巴瘤患者临床特征与预后分析

目的 探讨HBV感染与弥漫大B细胞淋巴瘤(DLBCL)的关系.方法 回顾性分析308例有乙肝两对半检测记录的初治DLBCL患者,分为HBV携带者(HBsAg+)31例、HBV既往感染者(HBsAg-/HbcAb+)90例、无HBV感染者(HBsAg-/HbcAb-)118例,接受CHOP样或R-CHOP样方案化疗.对三组患者的临床特征、生存及化疗期间与化疗结束12个月内肝功能损害情况进行比较分析.结果 三组患者3年总体生存时间(OS)分别为80.9%、74.3%和84.1%,无统计学差异(P=0.946);无进展生存时间(PFS)亦无统计学差异(P=0.405).采用COX回归多因素分析生存的不良预后因素包括男性、年龄大于60岁、IPI评分高、晚期、未联合利妥昔单抗.三组化疗期间肝功能损害发生率分别为36.8%、27.3%、62.1%,HBsAg+组在化疗期间及结束后1～3个月内肝功损害严重度明显高于其他两组,具有统计学差异,P值分别为0.00039和0.008.结论 HBsAg-/HBcAb-、HBsAg-/HBcAb+、HBsAg+三组临床特征生存时间相似,采用联合利妥昔单抗的方案化疗能提高全组患者生存.本研究推荐对HBsAg+的DLBCL患者化疗或免疫治疗时进行预防性抗病毒治疗,同时建议抗病毒治疗至少须延续至化疗结束后3个月,化疗中与化疗后均须密切监测肝功能、HBV-DNA水平.     

Prognostic impact of B-vitamins involved in one-carbon metabolism in patients with diffuse large B-cell lymphoma

One-carbon metabolism (OCM) plays a pivotal role in both the stability and integrity of DNA and is mainly regulated by B-vitamins. This study aims to investigate the clinical relevance of B-vitamins and single nucleotide polymorphisms (SNPs) on OCM-related genes in diffuse large B-cell lymphoma (DLBCL). A total of 322 newly diagnosed DLBCL patients who received rituximab plus cyclophosphamide, doxorubicin, vincristine, and prednisone-based immunochemotherapy were recruited into this study. The serum levels of B-vitamins (folate, vitamin B2 [riboflavin], vitamin B6 [pyridoxal 5′-phosphate], and vitamin B12 [cobalamin]), as well as SNPs on methylenetetrahydrofolate reductase, methionine synthase (MTR), MTR reductase (MTRR) and cystathionine gamma-lyase (CTH) genes, were assessed at diagnosis. The prognostic values were estimated using the Kaplan-Meier method and Cox proportional hazards regression methods. Overall, the low serum concentration of folate and vitamin B2, as well as the presence of CTH1364 TT genotype, were significantly associated with poor treatment response in DLBCL. Multivariate analysis indicated that compared with patients in the medium and high serum folate tertiles, low serum folate tertile patients had both significantly inferior progression-free survival (P = .033, Tertile 2 vs Tertile 1, and P = .031, Tertile 3 vs Tertile 1) and overall survival time (P < .001, Tertile 2 vs Tertile 1, and P = .001, Tertile 3 vs Tertile 1). Compared with patients in the medium and high serum vitamin B2 tertiles, low serum vitamin B2 tertile patients had both significantly inferior progression-free survival (P = .006, Tertile 2 vs Tertile 1, and P = .001, Tertile 3 vs Tertile 1) and overall survival time (P = .030, Tertile 2 vs Tertile 1, and P = .255, Tertile 3 vs Tertile 1). In conclusion, alterations in B-vitamin metabolism significantly affected disease progression and had a prognostic impact on DLBCL.     

Prognostic value of interim 18F-FDG PET/CT in diffuse large B-cell lymphoma

Objective: Diffuse large B-cell lymphoma (DLBCL) is a heterogeneous disease. The prognostic factor currently used is not accurate enough to predict the outcomes of patients with DLBCL. The prognostic significance of interim PET/CT in DLBCL remains controversial. The aim of this study is to determine the predictive value of interim 18F-FDG PET/CT after first-line treatment in patients with DLBCL. Methods: Thirty-two patients with DLBCL underwent baseline, interim and post-treatment 18F-FDG PET/CT scans. Imaging results were analyzed for the survival of patients via software SPSS 13.0, retrospectively. Results: Thirty-one of the 32 patients were treated with R-CHOP regimen, and interim 18F-FDG PET/CT of 24 patients was performed after 2 cycles of treatment. After a median follow-up period of 16.7 months, the 2-year progression-free survival (PFS) rates were significantly different between the groups above and below SUV max cut-off value of 2.5 (P=0.039). No significant differences were found in the 2-year PFS rates if SUV max cut-off values were set as 2.0 and 3.0, respectively (P=0.360; P=0.113). Conclusions: Interim PET/CT could predict the prognosis of DLBCL patients with the SUV max cut-off value of 2.5, but more clinical data should be concluded to confirm this conclusion.     

荧光定量PCR分析弥漫大B细胞淋巴瘤免疫球蛋白重链基因重排表达

背景与目的：大多数B细胞淋巴瘤患者综合治疗后可以达到完全缓解,但是一半以上的患者终究要复发.复发来源于体内残留的耐药淋巴瘤细胞,即微小残留病变.但临床上发现IgH基因重排阳性患者并非都出现复发或远处浸润.因此,推测阳性患者是否复发,可能与IgH基因重排的表达量有关.本研究探讨荧光染料标记的即时定量PCR方法检测弥漫大B细胞淋巴瘤免疫球蛋白重链基因（IgH）重排的可行性及临床意义.方法：44例DLBCL患者的57份新鲜骨髓标本用于检测IgH基因重排, Namalwa细胞系作阳性对照,U-937细胞系作阴性对照.β-actin 作内参照,SYBR Green荧光染料标记的实时荧光定量PCR方法分别检测IgH基因重排CDR III.结果：分析融解曲线可以确定IgH基因重排产物的特异性.荧光定量PCR检测IgH基因重排的阳性率63.2%.IgH/β-actin阳性表达量在0.01～4131.69,中位数0.42.Ⅰ/Ⅱ期患者IgH基因重排表达量中位数为0,Ⅲ、Ⅳ期患者IgH基因重排表达量中位数为0.35,经统计学检验,两组患者之间差异有显著性（P＝0.018）.LDH值高于正常组,IgH基因重排表达量为0.39,LDH值低于正常组,IgH基因重排表达量为0.01,经非参数检验,两组患者之间差异有显著性（P＝0.046）.结论：荧光染料标记的定量PCR方法可用于弥漫大B细胞淋巴瘤的骨髓微小残留病变的检测.检测骨髓IgH基因重排,可以协助分期.