纤维素三醋酸酯手性固定相分离药物对映体

用非均相乙酰化方法合成微晶纤维素三醋酸酯制备手性柱和手性薄层板用于HPLC和TLC,用95%乙醇或95%乙醇和缓冲液(pH10)的混合物为流动相分离特罗格尔碱、甲喹酮、氯美扎酮和氯喹对映体,讨论了流动相组成、pH、温度对分离对映体的影响。实验结果表明CTA手性板对流动相的组成和pH的变化较敏感,TLC流动相极性一般较HPLC流动相的极性大。上述4种对映体的HPLC分离度均达到0.6以上;TLC分离度均达到1.1以上。     

血清IL-2、sIL-2R在病毒性肝炎中的意义

为评估血清白细胞介素-2（IL-2）及可溶性白细胞介素-2受体（sIL-2R）在病毒性肝炎中的意义．对39例急性肝炎（AH）,57例慢性乙型肝炎（CHB）受试对象和健康献血员对照组,分别采用放射免疫测定法和双抗体夹心ELISA法检测其血清IL-2和sIL-2R,结果显示AH和CH-B,患者血清中IL-2水平分别为7．2±4.0ng／ml和7．3±5．2ng／ml,均明显低于对照组（P＜0．01）,而sIL-2R水平分别为417．5±165.1u／ml和402．8±136．1u／ml,均明显高于对照组（P＜0．01）。因此,我们认为血清IL-2和sIL-2R水平与病毒性肝炎病人的免疫功能和临床经过相关。     

Resolution of EBV(+) CNS lymphoma with appearance of CSF EBV-specific T cells

Current knowledge of Epstein-Barr virus (EBV)-specific T-cell responses in the cerebrospinal fluid (CSF) of patients with EBV-related lymphoproliferative disease (EBV-LPD) in the central nervous system (CNS) is very limited. Here, we present two recipients of hematopoietic stem cell transplants with EBV-LPD in the CNS. EBV-specific CD8(+) T lymphocytes were detected in CSF and peripheral blood using major histocompatibility complex (MHC) class I multimers loaded with EBV-derived peptides. The appearance of EBV-specific CD8(+) T cells in CSF and blood correlated with neurological improvement and disappearance of EBV-LPD. These observations suggest a role for EBV-specific CD8(+) T cells in the control of EBV-LPD in the CNS.