Inhibitory Effects of Parthenolide on the Angiogenesis Induced by Human Multiple Myeloma Cells and the Mechanism

The inhibitory effects of parthenolide （PTL） on angiogenesis induced by multiple myeloma （MM） cells in vitro and the mechanism were investigated. Human MM line RPMI8226 cells were cultured in vitro. The effects of MM culture supernatant on the migration and tubule formation ability of human umbilical vein endothelial cells （HUVECs） treated with PTL were observed. By using Western blot, the expression of p65 and IкB-α in MM cells was detected. RT-PCR was used to assay the expression of VEGF, IL-6, MMP2 and MMP9 mRNA in MM cells. ELISA was used to measure the levels of VEGF and IL-6 in MM cell culture supernatant. The expression of MMP2 and MMP9 in MM cells was examined by immunohistochemistry. （1） In 3.5, 5.0, 7.5 and 10 μmol/L PTL groups the number of migrated cells was 310±56, 207±28, 127±21 and 49±10 respectively, which was significantly different from that in positive control group （598±47） （P〈0.01）. In 3.5 and 5.0 μmol/L PTL groups the areas of capillary-like structures were 0.092±0.003 and 0.063±0.002 mm2, significantly less than in positive control group （0.262±0.012 mm2） （P〈0.01）, but in 7.5 and 10 μmol/L PTL groups no capillary-like structures were found; （2） After treatment with different concentrations of PTL for 48 h, the expression of p65 protein was gradually decreased, while that of IкB-α was gradually enhanced with the increased concentration of PTL; （3） After treatment with 3.5, 5.0, 7.5 and 10 μmol/L PTL for 48 h, the VEGF levels in the supernatant were 2373.4±392.2, 1982.3±293.3, 1247.0±338.4 and 936.5±168.5 pg/mL respectively, significantly different from those in positive control group （2729±440.0 pg/mL） （P〈0.05）. After treatment with 7.5 and 10 μmol/L PTL, the IL-6 levels in the culture supernatant were 59.6±2.8 and 41.4±9.8 pg/mL respectively, signifi- cantly lower than in positive control group （1287.3±43.5 pg/mL） （P〈0.05）; （4） RT-PCR revealed that PTL could significantly inhibit the expression of V     

多发性骨髓瘤患者血清OPG检测及临床意义

目的：探讨OPG在多发性骨髓瘤（MM）患者血清中的表达水平及与骨病、预后的关系,初步探索其在MM骨病和预后判断中的作用。方法：采用双抗体夹心酶联免疫吸附试验（ELISA）技术分别检测28例MM患者和28例对照组的血清中OPG的水平。结果：MM患者的血清OPG水平为（222．4±114．8）pg／ml,与对照组相比明显降低（P〈0．01）。0～1个骨损组血清OPG水平为（312．4±129．6）pg／ml,而2～3个骨损组为（179．0±59．4）pg／ml,0～1个骨损组明显高于2～3个骨损组（P〈0．01）。MM患者血清OPG水平与β2-微球蛋白相关（P〈0．01）,与球蛋白相关（P〈0．01）,与白蛋白无关（P〉0．05）,与临床分期、免疫学分型、血红蛋白、血钙未发现有相关性。结论：MM患者血清OPG水平明显低于正常对照,且其降低程度与骨损害的严重程度密切相关;同时,OPG水平与β2-微球蛋白呈负相关,提示血清OPG水平可能对MM的预后具有重要意义。     

脾脏血管窦内大B细胞性淋巴瘤1例报道

血管内大B细胞性淋巴瘤（intravascular large B cell lymphoma,IVLBCL）是毛细血管和小、中血管内淋巴瘤细胞增殖性疾病,是一种罕见的、具有高度侵袭性的结外弥漫性大B细胞性淋巴瘤的一种亚型。因此类型淋巴瘤发病率低,临床表现多样,本文报道贵州医科大学附属医院血液科收治的1例脾脏血管窦内大B细胞性淋巴瘤,以期为临床工作者提高对该类淋巴瘤的认识奠定一定的基础。