c-kit在血液病中的表达

目的 :探讨原癌基因c -kit在血液病中表达的情况。方法 :用Ficoll分离液分离 ,收集骨髓单个核细胞。c -kit的表达采用RT -PCR法。结果 :在不同血液病中c -kit的表达情况不一 ,在急性髓细胞性白血病 (AML)为 5 7.8% ,急性淋巴细胞性白血病 (ALL)为 8.3 % ,骨髓增生异常综合征 (MDS)为 40 %。结论 :c -kit主要在AML中表达 ,提示c -kit表达是粒细胞的一个特异性标志。     

伤病比在医院维权中的运用

为了保证民法的公平原则,避免医疗纠纷赔偿案件审理中忽视患者本身病情所致的不良后果的情况,对损伤与疾病对患者预后的影响进行了研究.介绍了伤病比的来源,论述了伤病比在医疗纠纷处理中的适用 范围,伤病比的级别与医院承担的赔偿额度.指出应增强伤病比意识,促进医与法的完美结合.     

Myostatin在小鼠腓肠肌失神经支配萎缩过程中的表达

目的:分析myostatin在腓肠肌失神经支配萎缩过程中的表达变化及其在肌萎缩过程中的作用。方法:采用坐骨神经横断术制备小鼠腓肠肌失神经支配模型,实时荧光定量PCR和Western印迹法分别检测失神经支配不同时段腓肠肌myostatin mRNA和蛋白表达水平,并对失神经前后肌肉湿重比、肌纤维横截面积进行比较。结果:失神经支配1 d时,腓肠肌myostatin mRNA迅速上升,3 d达到高峰,随后逐渐下降,而相应蛋白水平逐渐增高,7 d达到高峰继而逐渐下降,至56 d时mRNA和蛋白水平仍略高于正常水平。结论:腓肠肌失神经支配萎缩过程中myostatin的表达变化是一重要的分子事件。     

鼻内镜手术后筛窦黏膜转归的病理组织形态学观察及临床意义

目的：了解鼻内镜手术后修复各阶段筛窦黏膜的组织学转归情况，探讨术后筛窦黏膜转归过程的组织形态学规律，为完善治疗、提高手术治愈率提供科学的依据。方法：采用Messerklinger术式治疗22例成年慢性鼻窦炎（CS）及慢性鼻窦炎鼻息肉（CSNP）患者，分别在术后恢复的3个阶段进行形态学观察和光镜、电镜检查。结果：（1）术腔清洁阶段术腔分泌物潴留，光镜下上皮缺失、黏膜缺损，水肿，炎性细胞浸润，黏膜下出血；（2）黏膜转归竞争阶段可有囊泡、小息肉和肉芽生长，光镜下上皮细胞增生，部分杯状细胞增生，黏膜下腺体增生或减少；（3）上皮化完成阶段见术腔清洁，镜下大部分黏膜基本恢复正常，部分固有层为致密结缔组织取代，可见不典型腺体。结论：鼻内镜术后筛窦黏膜可以再生，鼻内镜术中、术后筛窦黏膜的正确保护和处理对黏膜再生修复有重要作用。     

Immune responses to the expressed products of the CSP antige n gene of Plasmodium falciparum southern China isolate FCC1/HN in Hela cell

Objective To construct a eukaryotic expression system with pcDNA3-PfCSP/Hela for the Circ umsporozoite protein (CSP) gene of Plasmodium falciparum (P.falciparum), t o observe the immune responses in BALB/c mice induced by the expressed proteins .Methods The recombinant plasmid pcDNA3-PfCSP was transformed into the Hela cell line. The expressed protein was isolated and analyzed by using SDS-PAGE and used for immunization of BALB/c mice by subcutaneous, intravenous, and intraperitone al adminstration.Enzyme-linked immunosorbent assay(ELISA), Dot-ELISA, Wester n blot, T lymphocyte proliferation test, natural killer cell(NKC) activity assay , and CD4(+) and CD8(+) T cell detection were used for observation of humoral an d cellular immune responses.Results Immune sera strongly reacted with the expressed protein, antibody titer was up to 1∶6400 as detected by ELISA.Western blot analysis revealed a specific b and at 38.3 Kda.When the spleen cells of normal and immunized BALB/c mice we re specifically stimulated with expressed protein, the optical densities were 0 .12±0.03 and 0.34±0.04, respectively.The latter were significantly highe r than the former (P<0.01).We used the MTT colorimetric assay to measure NKC activity of mice spleen.The results showed that the NKC activity of immuni zed BALB/c mice was remarkably higher than that of the controls (P<0.05). CD4(+) and CD8(+) T cells were detected by using monoclonal antibody immunofluor escence methods.The results showed that the percentage of CD4(+) and CD8(+) T cells of immunized group were significantly higher than that of control group ( P<0.05).Conclusions The humoral and cell-mediated immune responses and elevated NKC activity to pr oducts made with a eukaryotic expression system could be specifically detected i n BALB/c mice.These findings indicate that the expressed protein could enhance the immune function in mice.     

神经再生素对背根神经节细胞GAP—43和NF—L基因表达的影响

目的：观察中药有效组分神经再生素作用于神经细胞生长过程中,相关基因的表达变化。探讨神经再生素促神经生长的分子生物学机制。方法：采用RT-PCR法,观察神经再生素在促大鼠背根神经节生长过程中（4h,12h,24h),生长相关蛋白43（GAP-43）和神经丝蛋白（NF-L）基因表达的变化。结果：神经再生素可使背根神经节细胞GAP-43和NF-LmRNA物表达量增加。结论：神经再生素可作用于体外培养的神经细胞,使神经生长相关基因表达上调。     

效率:素质教育评价的至重砝码

教育评价、教育目标、教育活动是现代教育教学系统三大因素。构建科学的素质教育评价体系应提到战略高度来认识和解决。“高效”是素质教育的“特质” ,实现“高效化”是实施素质教育的必由之径。素质教育的“效率”是“投入”与“产出”之比 ,其投入包括时间、物力、人力、脑力等投入 ,其“产出”也是一个动态的结构系统     

Immunohistochemical analysis of the vimentin filaments in Sertoli cells is a powerful tool for the prediction of spermatogenic dysfunction

The close interaction between male germ cells and Sertoli cells, a type of somatic cell found in the seminiferous tubules of mammalian testis, is essential for the normal progression of spermatogenesis in mammals. Vimentin is an intermediate filament protein that primarily provides mechanical support, preserves cell shape, and maintains the nuclear position, and it is often used as a marker to identify Sertoli cells. Vimentin is known to be involved in many diseases and aging processes; however, how vimentin is related to spermatogenic dysfunction and the associated functional changes is still unclear. In a previous study, we reported that vitamin E deficiency affected the testes, epididymis, and spermatozoa of mice, accelerating the progression of senescence. In this study, we focused on the Sertoli cell marker vimentin and explored the relationship between the cytoskeletal system of Sertoli cells and spermatogenic dysfunction using testis tissue sections that caused male reproductive dysfunction with vitamin E deficiency. The immunohistochemical analysis showed that the proportion of the vimentin-positive area in seminiferous tubule cross-sections was significantly increased in testis tissue sections of the vitamin E-deficient group compared with the proportion in the control group. The histological analysis of testis tissue sections from the vitamin E-deficient group showed that vimentin-positive Sertoli cells were greatly extended from the basement membrane, along with an increased abundance of vimentin. These findings suggest that vimentin may be a potential indicator for detecting spermatogenic dysfunction.     

生姜合剂对运动病大鼠血浆皮质醇水平的影响

本文研究生姜合剂抗运动病时血浆皮质醇水平的变化,以探讨运动病与内分泌功能的关系,为运动病防治提供新的实验依据。方法:以旋转运动诱发大鼠条件性厌食症模拟运动病,用放射免疫法测定此时的血浆皮质醇水平,并观察生姜合剂(灌胃,1.8ml/200g)的抗运动病作用,及对血浆皮质醇水平的影响。结果:模拟运动病时大鼠血浆皮质醇水平有升高趋势,生姜合剂能进一步提高大鼠的血浆皮质醇水平。结论:运动病不是一种单纯的应激反应,运动病的发生可能与异常运动刺激引起机体内分泌功能紊乱有关。     

铅中毒对小鼠颌下腺神经生长因子基因表达的影响

目的探讨铅中毒对小鼠颌下腺的毒性作用及对神经生长因子基因（NGFmRNA）表达的影响。方法采用小鼠实验性铅中毒模型,通过光镜与电镜观察颌下腺的病理组织学变化。应用地高辛标记的人NGFDNA探针,采用原位杂交的方法,定量分析铅对小鼠颌下腺NGFmRNA表达的影响。结果实验性铅中毒小鼠体重下降,血铅浓度升高,颌下腺铅含量增加。光镜和电镜结果呈现铅中毒小鼠颌下腺腺叶萎缩,纤维增生,腺间质血管扩张,腺间隙增加。粗面内质网扩张,线粒体肿胀。图像分析结果表明,铅中毒小鼠颌下腺纹状管和颗粒曲管直径减小。原位杂交的结果显示,铅中毒小鼠颌下腺颗粒曲管和纹状管的杂交信号显著减弱,颌下腺组织中NGFmRNA表达减少。结论铅对小鼠颌下腺具有毒性作用,影响颌下腺NGF的基因表达。