Herein we reported a case of follicular lymphoma with 50.26% clonal malignant lymphocytes and 50% tumor cells positive for the immunoglobulin heavy chain gene and B-cell lymphoma 2 gene （IGH-BCL2）. To determine whet...Herein we reported a case of follicular lymphoma with 50.26% clonal malignant lymphocytes and 50% tumor cells positive for the immunoglobulin heavy chain gene and B-cell lymphoma 2 gene （IGH-BCL2）. To determine whether endothelial cells （ECs） within the tumor share the feature of advanced malignancy, we isolated and purified the ECs from the tumor by using the immunomagnetic beads conjugated with a monoclonal antibody against CD34, a surface marker of ECs. Thereafter, we identified ECs according to their morphology and found that ECs presented consistently flat and elongated appearance with a lot of Weibel-Palade bodies in the cytoplasm. Results of flow cytometry confirmed that ECs isolated from the follicular lymphoma expressed high level of both vWF and CD34 and the purity of the ECs fraction was more than 90%. Additionally, we used FISH to check chromosomal aberration in the purified ECs and found that some of the ECs had only one fusion signal for the green IGH probe and the red BCL2 probe in contrast to typical t（14;18）（q32;q21） translocation with two fusion signals. This phenomenon was also observed in the tumor cells. It might be a different breakpoint of IGH in this case, which induced the loss of the fusion signal, indicating t（14;18）（q32;q21） translocation. The positive cells accounted for 18% of the isolated ECs from the tumor, indicating that a proportion of ECs from follicular lymphoma had the same chromosome aberration as the neoplastic cells.展开更多
目的探讨同时下调长链非编码RNA(lncRNA)人浆细胞瘤转化迁移基因1(PVT1)和MINCR(MYC-induced long non-coding RNA)对淋巴瘤细胞株Raji增殖的影响及其可能机制。方法合成靶向PVT1、MINCR的小干扰RNA(siRNA)和无关对照siRNA(SC-siRNA)序...目的探讨同时下调长链非编码RNA(lncRNA)人浆细胞瘤转化迁移基因1(PVT1)和MINCR(MYC-induced long non-coding RNA)对淋巴瘤细胞株Raji增殖的影响及其可能机制。方法合成靶向PVT1、MINCR的小干扰RNA(siRNA)和无关对照siRNA(SC-siRNA)序列。实验分为PVT1-siRNA组、MINCR-siRNA组、PVT1-siRNA+MINCR-siRNA组、无关对照组和细胞组(未转染的Raji细胞)。将各条siRNA转入Raji细胞后,用实时定量RT-PCR方法检测MINCR RNA表达水平;分别用CCK8法、流式细胞仪、Western blot检测细胞增殖、细胞周期和c-Myc蛋白的表达情况。结果转染MINCR-siRNA后MINCR表达下调,与无关对照组和细胞组相比差异有统计学差异(P<0.05)。PVT1-siRNA联合MINCR-siRNA转染到Raji细胞后,细胞增殖明显受到抑制(P<0.05),细胞周期阻滞于G1期(P<0.05),c-Myc蛋白表达下降(P<0.05),且与单用PVT1-siRNA组、MINCR-siRNA组相比差异均具有统计学意义(P<0.05)。结论同时下调PVT1和MINCR可以增强对Raji细胞增殖的抑制作用。展开更多
基金supported by a grant from the National Natural Science Foundation of China(No.81001049)
文摘Herein we reported a case of follicular lymphoma with 50.26% clonal malignant lymphocytes and 50% tumor cells positive for the immunoglobulin heavy chain gene and B-cell lymphoma 2 gene （IGH-BCL2）. To determine whether endothelial cells （ECs） within the tumor share the feature of advanced malignancy, we isolated and purified the ECs from the tumor by using the immunomagnetic beads conjugated with a monoclonal antibody against CD34, a surface marker of ECs. Thereafter, we identified ECs according to their morphology and found that ECs presented consistently flat and elongated appearance with a lot of Weibel-Palade bodies in the cytoplasm. Results of flow cytometry confirmed that ECs isolated from the follicular lymphoma expressed high level of both vWF and CD34 and the purity of the ECs fraction was more than 90%. Additionally, we used FISH to check chromosomal aberration in the purified ECs and found that some of the ECs had only one fusion signal for the green IGH probe and the red BCL2 probe in contrast to typical t（14;18）（q32;q21） translocation with two fusion signals. This phenomenon was also observed in the tumor cells. It might be a different breakpoint of IGH in this case, which induced the loss of the fusion signal, indicating t（14;18）（q32;q21） translocation. The positive cells accounted for 18% of the isolated ECs from the tumor, indicating that a proportion of ECs from follicular lymphoma had the same chromosome aberration as the neoplastic cells.
