研究发现肝脏肿瘤逃脱自然杀伤细胞免疫监视新机制
自然杀伤细胞（Natural killer cells， NK cells）是一种效应性淋巴细胞，在人体抗肿瘤过程中发挥重要作用，但是，仍然有一些肿瘤细胞能够逃避机体NK细胞的攻击，逐步发生发展，侵袭转移，严重危害人体健康，其机理有待进一步探讨。 中国科学技术大学生命学院教授魏海明和田志刚课题组与安徽医科大学第一附属医院主任医师钱叶本合作，发现肝癌中浸润的NK细胞线粒体发生断裂，其抗肿瘤功能丢失。研究成果于10月21日以Mitochondrial fragmentation limits NK cell-based tumor immunosurveillance 为题，在线发表于《自然-免疫学》（Nature Immunology）杂志，该研究揭示了一种肿瘤免疫逃逸的新机制，为基于NK细胞的肿瘤免疫治疗提供了新思路与新靶标。 线粒体是细胞代谢的中枢，其形态高度动态变化，不断融合和分裂，线粒体融合后表现为线性或管状，呼吸......阅读全文
NO2dependent－IL－12－Pathway－in－NK－cells
Macrophages and NK cells help provide innate immunity against infection by intracellular parasites and communicate with each other to regulate this pr
Differentiate－ES－cells－into－glial－cells－and－neurons
Day -1: Pass ES cells at normal density on gelatinized plate to free the culture of contamination fibroblast cells.___________________Day 1: Trypsiniz
Culture－of－BEND－Cells－(Bovine－Endometrial－Cells)
Culture of BEND Cells (Bovine Endometrial Cells)Charles E. Krininger, III and Peter J. Hansen Dept. of Animal Sciences, University of FloridaThis prot
Differentiating－Neural－Stem－Cells－into－Neurons－and－Glial－Cells
实验概要The protocols in this section describe the steps involved in differentiating neural stem cells (NSC) to neurons, astrocytes, and oligodendrocyte
Trypsinizing－cells
There are many procedures with which to trypsinize cells. All include washing the cell monolayer with TD, or in rare cases, with VE. This removes seru
Lyophilizing－Cells
Inoculate 200 ml L-broth supplemented with appropriate antibiotics with the bacteria to be lyophilized.Incubate the culture at 37°C with vigorous shak
Freezing－Cells
1) Keep prepared solutions on ice.2) Determine total cell count of cells to be frozen. (e.g. 1 X 108 )3) Determine number of vials to be frozen. (e.g.
Growing－cells
No two cell lines behave exactly the same, so you must learn the peculiarities, or personality, of each of the cell lines with which you work. Irrespe
Lyophilizing－Cells
Lyophilizing CellsInoculate 200 ml L-broth supplemented with appropriate antibiotics with the bacteria to be lyophilized.Incubate the culture at 37°C
关于NK细胞活性测定(NK)的基本介绍
自然杀伤(NK)细胞是一群异质性多功能的免疫细胞，是与特异性免疫应答无关的自然毒杀伤细胞。它对体内多种细胞，特别是T、B淋巴细胞有调节作用。它所介导的裂解细胞作用不受主要组织相溶性复合体的限制。自然杀伤细胞不仅对癌细胞，对病毒、胞内寄生菌和老化变异细胞也具有极强的清除作用。NK细胞起杀伤作用不需
免疫学实验NK细胞活性测定（NK）介绍
NK细胞活性测定（NK）介绍： 自然杀伤(NK)细胞是一群异质性多功能的免疫细胞，是与特异性免疫应答无关的自然毒杀伤细胞。它对体内多种细胞，特别是T、B淋巴细胞有调节作用。它所介导的裂解细胞作用不受主要组织相溶性复合体的限制。自然杀伤细胞不仅对癌细胞，对病毒、胞内寄生菌和老化变异细胞也具有极强
简述NK细胞活性测定(NK)的检查过程
一、NK细胞活性测定(NK)的检查过程： 取传代后24h生长良好的YAC-1细胞(存活率＞95%)按1×106/mL YAC-1细胞悬液加3H-TdR 10uCi进行标记，于37℃、5%CO2培养箱中培养2h，每30min振荡1次。标记后的细胞用培养液洗涤3次，重悬于培养液中，使细胞浓度为1×
简述NK细胞活性测定(NK)的临床意义
一、NK细胞活性测定(NK)的临床意义： 异常结果：受试样品组的NK细胞活性显著高于对照组的NK细胞活性，可判定该项试验结果阳性。活性升高，常见于病毒感染的早期，Down综合征，接受器官移植、骨髓移植的患者等及免疫增强剂治疗患者。活性降低，常见于恶性肿瘤、重症联合免疫缺陷病，AIDS和免疫抑制
Preparing－cells－and...
实验概要The method provides a protocol and tips for BrdU staining in tissue sections.Bromodeoxyuridine (5-bromo-2-deoxyuridine, BrdU) is a synthetic
Subculturing－Adherent－Cells
实验概要The following protocol describes a general procedure for subculturing adherent mammalian cells in culture.主要试剂1. Complete growth medium, pre-warme
Isolation－of－papillary－cells
实验概要This protocols provides a general protocol for isolation of papillary cells.实验步骤Isolation of renal papillary cells1. For isolation of papillary c
Fluorescent－Staining－of－Cells
1. Fluorescent phalloidin in methanol. Phallacidin does not work as well. Dilute 10 ul 330 nM stock into 500 ul PBS for each large coverslip.2. PB
Isolation－of－papillary－cells
Isolation of renal papillary cells1. For isolation of papillary cells, kidneys were harvested and kept in HBSS containing 15 mM HEPES, penicillin/
Collection－of－Peritoneal－Cells
Prepare a 10ml syringe fitted with a 26G short needle and filled with 5 to 7 ml of medium and 2 to 3 ml of air. Air is important.Prepare a Pasteur pip
KARYOTYPING－ES－CELLS
An actively growing culture of cells is required, i e 2 - 3 d ES cell culture. The total number of cells needs to be between 106 - 107 cells.N B Read
Transfecting－Suspension－Cells
实验概要将转移基因整合到细胞染色体DNA上,形成稳定表达转移基因的细胞系。 实验原理 细胞转染技术是目前广泛应用于病毒基因结构与功能以及基因调控等的研究。细胞转染可分为短暂转染和稳定(或永久) 转染两种。在短暂转染中,被转染基因并不整合至细胞染色体中,因而不能随细胞分裂而传代。转入病毒基因的转
Electroporation－of－ES－cells
Cells are routinely passaged two days prior to electroporating. Usually one 10 cm plate at approximately 80% confluency will provide enough cells for
Freezing－and－Thawing－cells
Freezing and Thawing cellsFreezingIt is best to freeze cells that are growing rapidly. With adherent cells, it is easiest to set up 100 mm dishes, giv
Collection－of－Peritoneal－Cells
Prepare a 10ml syringe fitted with a 26G short needle and filled with 5 to 7 ml of medium and 2 to 3 ml of air. Air is important.Prepare a Pasteur pip
Immunofluorescence－Labeling－of－Cells
实验概要Antibodies are an important tool for demonstrating both the presence and the subcellular localization of an antigen. Cell staining is a very ver
临床化学检查方法介绍NK细胞活性测定（NK）介绍
NK细胞活性测定（NK）介绍： 自然杀伤(NK)细胞是一群异质性多功能的免疫细胞，是与特异性免疫应答无关的自然毒杀伤细胞。它对体内多种细胞，特别是T、B淋巴细胞有调节作用。它所介导的裂解细胞作用不受主要组织相溶性复合体的限制。自然杀伤细胞不仅对癌细胞，对病毒、胞内寄生菌和老化变异细胞也具有极强的清
NK细胞的来源
NK细胞确切的来源还不十分清楚，一般变人直接从骨髓中衍生，其安育成熟信赖于骨髓的微环境。小鼠和人的体外实验表明，胸腺细胞在体外IL-2等细胞因子存在条件下培养也可诱导出NK细胞。小鼠脾脏在体内IL-3诱导下可促进NK细胞的分化。NK细胞主要分布于外周血中，占PBMC5-10%，淋巴结和骨髓中也
Transforming－chemically－competent－cells
MethodThaw TSS cells on ice.Add DNA, pipette gently to mix (1μl of prepped plasmid is more than enough).Note: If you are adding small volumes (~1μl),
Isolation－of－lymphatic－endothelial－cells
Dermal Cell Suspensions 1. Dermatomed 0.8-mm split-thickness skin was obtained from adult healthy individuals undergoing elective surgery. 2
Isolation－of－rodent－pancreatic－β－cells
1. Adult rats weighing 250-350g were anesthetized, sacrificed and immediately used for pancreas sampling.2. Rat islets were isolated from male wistar