Objective:Blood-brain barrier is the key barrier of brain in the innate immune. It can prevent the harmful substances from the blood into the brain. In order to keep the brain in a relatively stable environment and maintain the normal function of the nervous system, it can also pump harmful substances or excess substances outside the brain selectively. Among them, brain microvascular endothelial cell tissue is a key part in the blood-brain barrier's function. The number of the patients with central nervous system ( CNS) diseases increased year by year. The therapeutic drug is usually inhibited by the blood-brain barrier and is difficult to work. Therefore, how to modify the drug and to make it easier to cross the blood brain barrier is the key point to cure CNS. At present, more than 95% research focus only on how nano drugs can enter the cell, the way and efficiency to enter the cell and the research of effect of nano drug etc. For the process of drug carrier in endocytosis, intracellular transport and release and regulation of research are rarely reported. Clathrin and P-glycoprotein are related protein in endo-cytosis and exocytosis with nano drug. Clathrin is located on the plasma membrane. It participates in endocytosis of some nutrients, and maybe the entry into the cell of some drugs. P-glycoprotein is located in the membrane of cer-ebral capillary endothelial cells. It can efflux drugs relying on ATP. Although there is a certain understanding of the cell in the inner swallow and efflux. But the process of the liposome drug is not clear. To solve the above prob-lems, using colloidal gold liposome nano materials to trace liposome's transport and regulation mechanism in brain microvascular endothelial cells, and study endocytosis, release, distribution and regulation mechanism of nano lipo-somes in brain microvascular. The solution of this problem can guide to construct reasonable drug carrier, and look forward to clarifing the molecular basis and mechanism of nano drug carriers across the BBB. This work has impor-tant theoretical and practical significance for the development and application of liposomes in the future. Results:For untreated cerebral microvascular endothelial cells, the cells incubated with colloidal gold liposomes can uptake of liposome colloidal gold, and with the extension of time, there are gold colloids in the plasma membrane, endo-plasmic reticulum, Golgi apparatus and lysosomes in order, and finally colloidal gold liposome exports out of the cell. For cerebral microvascular endothelial cells treated by sodium azide, compared with untreated cells, the cells incubated with colloidal gold liposomes, cannot be observed liposome colloidal gold in them. For cerebral microvas-cular endothelial cells treated by reserpine, the cells incubated with colloidal gold liposomes, compared with un-treated cells, colloidal gold liposome cannot export out of the cell. Conclusions:The uptake of liposomes in brain microvascular endothelial cells require clathrin's participation. The excretion of liposomes from brain microvascular endothelial cells require P-glycoprotein's participation. After colloidal gold liposome entering brain microvascular endothelial cells, it moves into the endoplasmic reticulum, Golgi apparatus and lysosomes in order. Finally colloi-dal gold liposome exports out of the cell.

The endoplasmic reticulum (ER) consists of a complex system of tubules, lamellae, and flattened vesicles, and has a variety of morphologies in different cells. It is believed to play a central role in the biosynthesis of cholesterol, phospholipids, steroids, prostaglandins, membrane and secretory proteins[1]. Cancer cells have different functions and ultrastmcture from their original cells[2-4]. The studies on ER membrane system of cancer cells are of great significance in understanding their malignant behavior. In the present work, the ultrastructural characteristics of ER in human colorectal carcinoma cell lines with different differentiation degrees were investigated.

内质网驻留的分子伴侣与内质网应激的细胞内信号传导途径

内质网(endoplasmic reticulum,ER)和高尔基体(Golgi complex)是多数细胞内、细胞表面和细胞外蛋白质合成、加工和转运的主要场所.蛋白的合成从转录水平开始,经过翻译形成原始的肽链.

流行性出血热病毒对人体骨髓细胞作用的研究

本文应用免疫荧光染色技术及组织培养技术,结合细胞学检查,研究了流行性出血热(EHF)病毒对骨髓细胞的作用.检测了51例患者骨髓细胞的病毒抗原,37例呈现阳性.抗原从第一病日即出现,持续至第十一病日.用VeroE6细胞从10份患者骨髓细胞中分离病,10份全部阳性.细胞学观察见巨核细胞有成熟障碍,并在细胞胞浆扩张的内质网及高尔基氏体腔内观察到到病毒样颗粒.根据实验结果,认为EHF病毒可侵入骨髓细胞中,并可能引起巨核细胞成熟障碍及免疫细胞发育异常.

CKLFSF2在人精子发生中的表达和定位

Aim: To investigate the expression and subcellular localization of chemokine-like factor superfamily 2 (CKLFSF2) in human testis and its potential role in spermatogenesis. Methods: A specific polyclonal antibody against CKLFSF2 was raised. The expression and cellular localization of CKLFSF2 in the seminiferous tubules was checked by immunohistochemistry method. Also, in situ hybridization was applied to localize the mRNA distribution. The EGFPCKLFSF2 fusion protein was expressed in COS-7 cells to localize its subcellular location in vitro. In addition, the abnormal expression of CKLFSF2 in testes of patients with male infertility was assayed by reverse transcription polymerase chain reaction (RT-PCR) and immunohistochemistry methods. Results: Having a close correlation with spermatogenesis defects, CKLFSF2 was specifically expressed in meiotic and post-meiotic germ cells, which were localized to the endoplasmic reticulum (ER) near the Golgi apparatus. Conclusion: CKLFSF2 could play important roles in the process of meiosis and spermiogenesis, and might be involved in the vesicular transport or membrane apposition events in the endoplasmic reticulum.

罗建红教授团队在《细胞研究》发文阐明N－甲基－D－门冬氨酸受体含GluN2 A亚型选择性调控的新机制

近日，浙江大学医学院罗建红教授团队在《细胞研究》（ Cell Research）发表了研究论文“Activity－induced synaptic delivery of the GluN2A－containing NMDA receptor is dependent on endoplasmic reticulum chaperone Bip and involved in fear memory”（http：／／www．nature．com／cr／journal v／25／n7fullcr201575a．html）。该研究首次发现内质网分子伴侣蛋白Bip介导了N－甲基－D－门冬氨酸（ NMDA）受体含GluN2A亚型选择性的突触表达，从而调控中枢神经系统的可塑性和动物行为。