肝细胞生长因子基因转染骨髓间充质干细胞对脂肪颗粒移植存活率的影响

目的研究携带人肝细胞生长因子基因的重组腺病毒（Ad—HGF）修饰骨髓间充质干细胞（MSCs）对大鼠脂肪颗粒移植存活率的影响。方法用携带绿色荧光蛋白的重组腺病毒（Ad-GFP）、Ad—HGF转染雄性Wistar大鼠MSCs,测定转染效率与感染上清中肝细胞生长因子（HGF）的表达。用雌性Wistar大鼠150只,随机分为5组：空白对照组（A组）、Ad—HGF组（B组）、MSCs组（C组）、Ad—GFP感染MSCs组（D组）和Ad—HGF感染MSCs组（E组）,每组30只。各组均匀振动5分钟,将颗粒脂肪移植于自体背部皮下;移植后3、5、7、14、28、60d,每组各取5只大鼠脱颈处死,取出移植物;测体积、HE、Masson染色观察病理改变,免疫组织化学法测定组织中HGF表达和血管生成。结果积分吸光度＝100时,Ad—GFP转染MSCs效率可达89．6％;移植后3、5、7、14d,E组移植物中HGF的表达高于其他各组（P〈0．05）;移植后5、7、14、28、60d,E组血管数量也多于其他各组（P〈0．05）;28d和60d时,E组脂肪颗粒体积保持率明显好于其他4组（P〈0．05）。结论携带HGF基因的MSCs在移植物中能够持续表达HGF,有效地减少脂肪颗粒移植后的吸收,从而提高移植颗粒脂肪的存活率。     

强骨丹对去卵巢大鼠骨质疏松症防治作用的实验研究

[目的]探讨中药强骨丹对绝经后骨质疏松症的防治作用。[方法]运用切除大鼠卵巢方法建立去卵巢骨质疏松症模型,随机分为模型组、强骨丹高低剂量组、西药组,同时设假手术对照组。采用双能X线骨密度测定法、放射免疫分析法和ELISA法等检测各组实验鼠骨密度 (BMD)、骨矿含量 (BMC)、血清雌二醇 (E₂)、骨钙素 (BGP)、抗酒石酸酸性磷酸酶5b(TRACP5b)以及尿脱氧吡啶啉 (Dpol)。[结果]强骨丹可明显升高BMD、BMC,提高血清E₂ 水平,降低TRACP5b和Dpd水平,并降低BGP含量。[结论]强骨丹通过调节机体相关内分泌功能,抑制骨吸收,降低骨的转换率,减少骨丢失,增加骨密度,对绝经后骨质疏松症有防治作用。     

非酒精性脂肪性肝病合并多囊卵巢综合征的相关性研究

目的调查多囊卵巢综合征（PCOS）患者非酒精性脂肪性肝病（NAFLD）的发病情况,探讨NAFLD与PCOS患者代谢特征的相关性。方法选择PCOS组145例及对照组122例为研究对象,测定血清空腹血糖（FBG）、餐后2h血糖、空腹胰岛素（FINS）、餐后2h胰岛素、总甘油三酯（TG）、总胆固醇（Chol）、低密度脂蛋白（LDL）、高密度脂蛋白（HDL）、谷丙转氨酶（ALT）、谷草转氨酶（AST）,以超声诊断脂肪肝。结果 PCOS组NAFLD的发生率明显高于对照组,差异有统计学意义（P〈0.01）;PCOS组的ALT、餐后2h INS、HOMA-IR高于对照组,差异有统计学意义（P〈0.01）。PCOS患者伴与不伴NAFLD组比较,NAFLD组的ALT、餐后2h INS、BMI、FINS、HO-MA-IR、TG明显高于非NAFLD组,差异有统计学意义（P〈0.05）;NAFLD的发生率与ALT、餐后2 h INS、BMI、FINS、HOMA-IR呈正相关。结论 PCOS患者易患NAFLD,对肥胖及胰岛素抵抗的PCOS患者应常规进行转氨酶及肝脏超声检查。     

电磁脉冲辐射对原癌基因c-fos调控区的影响

目的　通过研究电磁脉冲 (electromagneticpulse ,EMP)辐射对原癌基因c fos调控区域的影响 ,探讨其诱导细胞功能改变的机制。方法　构建c fos启动区氯霉素乙酰化转移酶 (chloramphenicolacetyl transferase,CAT) ,然后转染HeLa癌细胞株 ,高场强EMP模拟源 (有界波模拟源 )辐射细胞 ,EMP场强为6× 10 4V/m ,脉冲上升时间为 2 0ns ,脉宽为 3 0 μs ,频率为 2 .5个脉冲 /min ,辐射 2min ,处理后 2 0min时观察细胞中CAT的活性。结果　EMP辐射转染的细胞后 2 0min ,转染了P50 0 ( -711～ -2 2 3bp)和P2 50 ( -3 62～-10 0 )的Hela细胞其CAT活性明显高于对照水平的活性 (P <0 .0 1)。结论　EMP辐射可引起c fos基因调控区的 -3 62～ -2 2 5明显改变。     

食品药品检验检测信息化建设发展现状与经营介绍——以山东省食品药品检验研究院为例

本文总结了我院2016~2018信息化全面建设工作,包括机房、网络和应用系统建设,重点介绍实验室信息管理系统（LIMS）建设情况、经验和教训,以期为全国食品药品检验检测单位的信息化建设工作提供参考。     

Erythroid marrow function in anemic patients

Erythropoietic activity is known to be closely associated with marrow iron uptake. A modification of the standard measure of plasma iron turnover has been developed in which erythron transferrin uptake (ETU) rather than iron uptake has been calculated. The ETU has the advantage of providing a parameter of erythroid marrow activity independent of change produced by plasma iron and transferrin saturation. Measurements in 80 patients with anemia were compared to the normal value of 60 +/- 12 mumol/L whole blood/d. The mean ETU for ten patients with severe aplastic anemia and for six patients with pure red-cell aplasia were 12 +/- 8 and 12 +/- 11 mumol/L whole blood/d, respectively. In ten transfusion-dependent patients with renal failure under dialysis therapy, the mean value was 35 +/- 11, while ten other dialyzed patients who were transfusion independent had a mean ETU of 73 +/- 21 mumol/L whole blood/d. Sixteen patients with hemolytic anemia had an average ETU of 400 +/- 130, while 28 patients with ineffective erythropoiesis had a mean value of 474 +/- 147 mumol/L whole blood/d. While patients with hypoproliferative anemia showed no relation between the severity of anemia and ETU, those with hyperproliferative erythroid marrow showed increasing values as the anemia became more severe. Sequential measurements in patients with aplastic anemia under treatment and in thalassemic patients under transfusion therapy showed the value of this measurement in monitoring the effects of treatment on erythroid marrow activity. It is concluded that the measurement of ETU provides a more direct ferrokinetic evaluation of erythroid activity in anemic states.     

Identification of T lymphocytes in human mixed hemopoietic colonies

The addition of a T-cell growth-promoting medium (PHA-TCM) to culture conditions that support growth of multi-lineage hemopoietic colonies enhances the proliferation of cells with lymphoid morphology within these colonies. These cells were identified as T lymphocytes by their ability to form rosettes with SRBC and their reaction with monoclonal antibodies (OKT3, OKT4) directed against T-cell-specific surface components. They continue to proliferate extensively under the influence of PHA-TCM after transfer of mixed colonies into liquid suspension culture. Supportive evidence for a common progenitor of myeloid and lymphoid cells within single mixed colonies is provided by Y-chromatin body analysis of E-rosette positive and negative cells in colonies grown in cocultures of male and female bone marrow cells.     

瑞香素杀疟原虫裂殖体的作用

[目的 ]研究中药瑞香素在体外和体内的杀裂殖体作用。 [方法 ]在恶性疟原虫FCCl株常规体外培养中测试瑞香素杀裂殖体活性 ,并按“四天抑制性试验”在感染伯氏疟原虫ANKA株的小鼠中测定不同剂量瑞香素的体内抗疟活性。 [结果 ]体外试验中瑞香素在 1～ 10 μmol L剂量范围内有明显杀灭裂殖体作用 ,而体内试验中按D4减虫率与感染鼠在 30d内的平均生存天数评价 ,5 0或 10 0mg kg .d- 1 × 4d瑞香素灌胃以及 10 ,5 0或 10 0mg kg.d- 1 × 4d瑞香素腹腔注射给药在伯氏鼠疟原虫ANKA株感染鼠中的抗疟作用与 10mg kg .d- 1 × 4d氯喹 (CQ)灌胃的疗效相似。 [结论 ]瑞香素在体外和体内均有一定的杀裂殖体作用。