小鼠主要组织相容性复合体在鼠肝癌H_(22)中的表达

目的观察小鼠主要组织相容性复合体(H-2)在小鼠移植性肝癌的核酸及蛋白水平的表达,初步探讨动物移植性肿瘤的可移植机制。方法以小鼠移植性肿瘤H22为实验材料,BALB/c小鼠为荷瘤动物,以荷瘤小鼠肝脏为参照,应用RT-PCR技术检测H-2分子在mRNA水平的表达,以免疫组化技术检测在蛋白水平的表达。结果在小鼠移植性肝癌H22中,H-2分子在核酸水平的表达无异常,而在蛋白表达水平出现下调。结论鼠肝癌H22的H-2分子在蛋白水平的表达下调可能与肿瘤的可移植性有关。     

小鼠胚胎成纤维细胞的分离培养

目的探讨小鼠胚胎成纤维细胞(MEF)的分离与培养。方法取BALB/c小鼠胚胎分离成纤维细胞,利用体外培养体系,对MEF的生长形态进行观察,并对传代细胞培养液、胚胎胎龄、胰蛋白酶浓度进行筛选。结果 MEF在体外为贴壁生长型细胞,第三、四、五代细胞纯度较高且增殖最为旺盛;添加血清的M199和DMEM均能较好的满足原代细胞的生长,两种培养液中细胞增殖的速度无明显差异;11.5～16.5d胎龄的小鼠胎儿MEF分离效果最好;0.1%胰蛋白酶消化MEF时间以8～11min为宜。结论通过对MEF分离培养影响因素的筛选,为MEF的进一步研究奠定了基础。     

小鼠大脑急性缺血过程中31P NMR研究

利用³¹P NMR研究了小鼠大脑在急性缺血状态下能量代谢的特点,结扎带迷走神经的颈总动脉后,PCr/Pi、β-ATP/Pi比值迅速下降,且PCr/Pi下降速度较快,同时脑细胞内酸中毒加重.缺血5min后恢复供血,可部分地逆转缺血造成的损伤.     

鼠标文字输入法及其应用

鼠标文字输入法是我校首家推出的一种新型文字输入方法.这种方法是利用鼠标器作为文字输入设备,结合机器的窗口提示系统,而完成对文字信息的输入.具有易学好用的特点,本文介绍了这种方法的基本思想和应用该方法实现的多文种处理系统.     

Proteome analysis of the culture environment supporting undifferentiated mouse embryonic stem and germ cell growth

The therapeutical interest of pluripotent cells and ethical issues related to the establishment of human embryonic stem cell (ESC) or embryonic germ cell (EGC) lines raise the understanding of the mechanism underlying pluripotency to a fundamental issue. Establishing a protein pluripotency signature for these cells can be complicated by the presence of unrelated proteins produced by the culture environment. Here, we have analyzed the environment supporting ESC and EGC growth, and established 2-D reference maps for each constituent present in this culture environment: mouse embryonic fibroblast feeder cells, culture medium (CM) and gelatin. The establishment of these reference maps is essential prior to the study of ESC and EGC specific proteomes. Indeed, these maps can be subtracted from ESC or EGC maps to allow focusing on spots specific for ESCs or EGCs. Our study led to the identification of 110 unique proteins from fibroblast feeder cells and 23 unique proteins from the CM, which represent major contaminants of ESC and EGC proteomes. For gelatin, no collagen-specific proteins were identified, most likely due to difficulties in resolution and low quantities. Furthermore, no differences were observed between naive and conditioned CM. Finally, we compared these reference maps to ESC 2-D gels and isolated 17 ESC specific spots. Among these spots, proteins that had already been identified in previous human and mouse ESC proteomes were identified but no apparent ESC-specific pluripotency marker could be identified. This work represents an essential step in furthering the knowledge of environmental factors supporting ESC and EGC growth.     

Optical mouse acting as biospeckle sensor

In this work we propose some experiments with the use of optical computer mouse, associated to low cost lasers that can be used to perform several measurements with applications in industry and in human health monitoring. The mouse was used to grab the movements produced by speckle pattern changes and to get information through the adaptation of its structure. We measured displacements in wood samples under strain, variations of the diameter of an artery due to heart beat and, through a hardware simulation, the movement of an eye, an experiment that could be of low cost help for communication to severely handicapped motor patients. Those measurements were done in spite of the fact that the CCD sensor of the mice is monolithically included into an integrated circuit so that the raw image cannot be accessed. If, as was the case with primitive optical mouse, that signal could be accessed, the quality and usefulness of the measurements could be significantly increased. As it was not possible, a webcam sensor was used for measuring the drying of paint, a standard phenomenon for testing biospeckle techniques, in order to prove the usefulness of the mouse design. The results showed that the use of the mouse associated to a laser pointer could be the way to get metrological information from many phenomena involving the whole field spatial displacement, as well as the use of the mouse as in its prime version allowed to get images of the speckle patterns and to analyze them.     

A chiral HPLC-UV method for the quantification of dibenz[b,f]azepine-5-carboxamide derivatives in mouse plasma and brain tissue: eslicarbazepine acetate, carbamazepine and main metabolites

For the first time, a selective and sensitive chiral HPLC-UV method was developed and fully validated for the simultaneous quantification of eslicarbazepine acetate (ESL), carbamazepine (CBZ), S-licarbazepine (S-Lic), R-licarbazepine (R-Lic), oxcarbazepine (OXC) and carbamazepine-10,11-epoxide (CBZ-E), in mouse plasma and brain homogenate supernatant. After the addition of chloramphenicol as the internal standard, samples were processed using an SPE procedure. The chiral chromatographic analysis was carried out on a LiChroCART 250-4 ChiraDex column, employing a mobile phase of water and methanol (88:12, v/v) pumped at 0.9 mL/min and the UV detector set at 235 nm. The assay was linear (r(2) ≥0.995) for ESL, CBZ, OXC, S-Lic, R-Lic and CBZ-E in the range of, respectively, 0.2-4, 0.4-30, 0.1-60, 0.2-60, 0.2-60 and 0.2-30 μg/mL, in plasma, and of 0.06-1.5 μg/mL for ESL, 0.12-15 μg/mL for CBZ and CBZ-E and 0.06-15 μg/mL for OXC and both licarbazepine (Lic) enantiomers in brain homogenate supernatant. The overall precision was within 8.71% and accuracy ranged from -7.55 to 8.97%. The recoveries of all the compounds were over 92.1%. Afterwards, the application of the method was demonstrated using real plasma and brain samples obtained from mice administered simultaneously with ESL and CBZ.     

A European perspective on progress in moving away from the mouse bioassay for marine-toxin analysis

This review considers the ethical and technical problems currently associated with employing mouse bioassays for marine-toxin analysis and the challenges and the difficulties that alternative methods must overcome before being deemed applicable for implementation into a regulatory monitoring regime. We discuss proposed alternative methods, classified as functional, immunological and analytical, for well-established European toxins as well as emerging toxins in European waters, highlighting their advantages and disadvantages. We also consider emerging tools and technologies for future toxin analysis.Even though regulatory bodies have recently recommended analytical methods for a number of toxins, there is still scope for functional and immunological methods in rapid screening and detecting emerging toxins. Future developments foreseen in the analysis of marine biotoxins are multiplex-based analysis, miniaturization and portability for on-site testing. However, the longstanding lack of reference materials and standards continues to pose a severe limitation on progress in development, validation and therefore implementation of any alternative method based on the criteria stipulated by European Union legislation.     

钼暴露对雌性小鼠胚胎体内发育的影响

为了探索钼对雌性动物生殖性能的影响,以雌雄ICR小鼠为实验动物,通过在饮水中添加不同剂量的钼酸钠,建立钼暴露模型:对照组(饮蒸馏水)、低钼组(200 mg/L)、中钼组(400 mg/L)、高钼组(600 mg/L)。在染毒30 d时,与正常雄鼠交配,第3.5 d观察胚胎发育情况,第5.5 d检测子宫着床情况。结果表明:高钼组和中钼组胚胎发育的正常率显著低于对照组(P<0.05),低钼组差异不明显;高钼组着床率显著低于对照组(P<0.05),中钼组和低钼组差异不显著;钼处理组的平均着床胚泡数均显著低于对照组(P<0.05);此外,钼暴露雌鼠的卵巢及子宫出现了不同程度的淤血和肿胀。可见:钼摄入过量会对胚胎发育、着床及生殖器官形态产生显著不利影响,甚至造成不孕,这可为钼毒理学研究、环境污染造成不孕的研究提供资料。     

雪莲对小鼠腹腔巨噬细胞Fc和C_(3b)受体及红细胞免疫粘附功能的影响

检测巨噬细胞膜F_c和C_(3b)受体的活性及红细胞免疫粘附功能是选一步研究补益药增强机体免疫功能的重要手段。为探讨雪莲增强免疫作用的机制,本实验采用EA、YC花环形成以及红细胞C(3b)受体花环和免疫复合物花环形成等方法分别检测了雪莲和雪莲多糖对脾虚模型和氢化可的松琥珀酸钠(HCSS)抑制的小鼠腹腔巨噬细胞F_c和C_(3b)受体及红细胞免疫粘附功能的影响以及对胰酶损伤的小鼠腹腔巨噬细胞F_c和C_(3b)受体的修复作用。结果表明雪莲和雪莲多糖能提高脾虚模型和HCSS抑制的小鼠腹腔巨噬细胞EA和YC花环形成率及红细胞C_(3b)受体花环形成率和免疫复合物花环形成率,但二者在体外作用一小时,对胰酶损伤的小鼠腹腔巨噬细胞EA和YC花环形成率无显著影响,说明雪莲和雪莲多糖能增强脾虚模型和HCSS抑制的小鼠腹腔巨噬细胞膜F_c和C_(3b)受体及红细胞免疫粘附功能,对胰酶损伤的小鼠腹腔巨噬细胞F_c和C_(3b)受体,则无明显的修复作用。