Effects of recombinant tumour necrosis factor on antibody-dependent eosinophil-mediated damage to Schistosoma japonicum larvae

Human recombinant tumour necrosis factor (rTNF) enhanced monoclonal IgE-dependent eosinophil-mediated cytotoxicity to schistosomula of Schistosoma japonicum in a dose-dependent manner. The enhancing effect of rTNF was also observed for the antibody-dependent cytotoxicity of a human eosinophilic leukemia cell line, EoL-3, but not of another cell line, EoL-1. Observation by a slow-motion movie camera demonstrated that activated EoL-3 cells adhered to the surface of schistosomula by 6 h after incubation, which triggered intracellular movement of eosinophil granules. The granules were concentrated toward the surface of the larvae and then degranulation started. The cell membrane was left as a balloon-like remnant. Cell sorting analysis by FACStar indicated that the expression of receptors for C3bi (CR3) and low affinity FcR for IgE (Fc epsilon RII) increased on the surface of EoL-3 cells after stimulation with rTNF, while this was not observed for EoL-1 cells.     

前列腺酸性磷酸酶在非前列腺腺癌中的表达

目的:探讨前列腺相关抗原-前列腺酸性磷酸酶(PAP)在非前列腺癌中的表达水平. 方法: 分别用RT-PCR方法和Western Blot方法检测多种腺癌细胞系中PAP mRNA和PAP蛋白的表达水平;用免疫组织化学方法检测多种腺癌肿瘤组织中的PAP蛋白的表达水平. 结果: 3种结肠癌细胞(colo 201, colo 205和colo 320)、3种胃癌细胞(MKN-7, MKN-28和 MKN-45)和7种乳腺癌细胞(OCUB-F, OCUB-M, R-27, MCF-7, CRL-1500, YMB-1-E和MDA-MB-231)表达PAP mRNA和PAP蛋白,结肠癌、胃癌和乳腺癌肿瘤组织中PAP呈阳性表达. 在检测的5种肾细胞癌细胞和肾细胞癌组织中均未发现有PAP的表达. 结论: PAP是结肠癌、胃癌和乳腺癌的新靶点.     

A rupture of lung metastasis of hepatocellular carcinoma causing haemothorax

A 67 year old male with non-resectable hepatocellular carcinoma (HCC) in both lobes and liver cirrhosis was treated with transcatheter arterial embolization and regional chemotherapy. He was doing well for 18 months. He was readmitted for fever, chest pain and multiple pulmonary metastases. During interleukin-2 therapy, he suddenly developed dyspnoea and palpitation, and was in shock. Left-sided haemothorax was confirmed by draining 3 L of fresh blood. In spite of intensive care, he died within 36 h. Autopsy showed that the haemothorax was caused by rupture of one of the metastases in the upper lobe of the left lung, and that the primary HCC was totally necrotic. Survey of the literature failed to find a report of fatal bleeding from a lung metastasis of HCC.     

A specific chromosome abnormality of t(4;12)(qll-12;pl3) in CD7+ acute leukaemia

Summary. Three cases of acute leukaemia with t(4;12) (qll-12;pl3) karyotypic abnormalities were analysed. They had the following common clinical and biological characteristics: (1) dysplasia of three haemopoietic lineages; (2) absent or low myeloperoxidase activity; and (3) retention of platelets in the peripheral blood and megakaryocytes in the bone marrow. There were increased numbers of basophils in the bone marrow and peripheral blood in two of the cases. In all, the blast cells displayed the unique immunophenotype CD7⁺CD13⁺CD34⁺HLA-DR⁺. The blasts analysed in one case expressed c-kit on the membrane surface. These findings suggest that the t(4:12) (qll-12:pl3) abnormality is associated with a particular type of acute leukaemia, one in which the morphology and immunophenotype suggest that the translocation may have occurred at an early stage of haemopoiesis.