Cell:人类细胞如何对外部环境信号产生反应并加工处理
近日,一项发表于Cell的研究报告中,来自海德堡大学等机构的科学家们利用新型生物技术方法分析了人类细胞如何对外部信号产生反应并加工处理。研究者重点对G蛋白及其受体GPCRs之间的相互作用进行研究,G蛋白是信号传输的介导子,而GPCRs则会诱发信号过程。图片来源:Thomas Splettstoesser (www.sci-style.com) 研究者表示,他们不仅能够更好地理解GPCRs-G蛋白之间的相互作用,还能够有效预测这两者的功能。所有的有机体均能对来自环境中的外部信号产生反应,在人类和其它动物中,这些信号能被细胞膜中的受体(与G蛋白进行偶联)检测到并加工处理,GPCRs是最大的跨膜受体家族,其能对大量细胞外的物理化学信号产生反应,并诱发细胞中的特殊过程,其中一种方法就是与一种或多种G蛋白进行偶联,这项研究中,研究人员就对这些偶联过程进行了深入研究分析。 人类机体中拥有16种G蛋白,其能与近乎1000种GPCRs相......阅读全文
Cell-Stem-Cell
|泛素连接酶HECTD1通过协调核糖体大小亚基的组装来调控造血干细胞的再生能力 造血干细胞(Hematopoietic stem cell, HSC)具有自我更新和分化的功能。在正常生理状态下,HSC处于休眠状态,其蛋白合成速度受到严格地调控并维持在较低水平。当机体受到损伤时,HSC 能够迅速
Cell-to-Cell-Adhesion-Signaling
Interactions between cells responsible for cell to cell adhesion also can communicate signals into the cellular interior, often involving interactions
Cell-Thawing/Cell-Freezing-Protocol
Freezing Cells:Cells should be growing well or known to be in log phaseCount, collect and pellet cells in a 15mL test tubeResuspend in freezing media
Cell-Thawing/Cell-Freezing-Protocol
Freezing Cells:Cells should be growing well or known to be in log phaseCount, collect and pellet cells in a 15mL test tubeResuspend in freezing media
Cell-Stem-Cell-|-连续取得进展!
下丘脑含有惊人的异质性神经元,可调节内分泌,自主神经和行为功能。然而,其分子发育轨迹和神经元多样性的起源仍不清楚。2021年4月21日,中国科学院遗传与发育生物学研究所吴青峰团队在Cell Stem 在线发表题为“Cascade diversification directs generati
In-Cell-ELISA
实验概要This protocol is a general protocol for ICE analysis and can be used with any of Abcam's ICE-validated antibodies. Antibodies are availabl
Cell-Stem-Cell:皮肤是突变的战场?
正常皮肤含有混杂的突变细胞,但很少有最终形成癌症的,科学家现在发现了原因。剑桥大学桑格研究所和MRC癌症研究所的研究员通过基因工程小鼠,发现皮肤组织中的突变细胞会相互竞争,只有适者才能生存。 9月27日发表在Cell Stem Cell杂志上的研究结果显示,人类正常皮肤对癌症的抵抗力比之前想象
Cell-Stem-Cell综述:干细胞免疫调控
免疫系统是我们机体对抗入侵病原体的第一道防线,也是组织发展,内环境稳态和伤口修复不可或缺的一部分。近年来,科学家们已越来越认识到免疫系统中的细胞和体液成分也有助于损坏组织的再生,比如四肢、骨骼肌肉、心脏和中枢神经系统中出现的损伤,因此在这一方面进行了大量的研究。 7月Cell Stem Ce
Cell-Stem-Cell揭示新癌症干细胞
日前,Lawson健康研究所的研究人员在结肠中鉴定到了与癌症生长有关的新干细胞群体。这项研究发表在Cell Stem Cell杂志上,将给结肠癌研究和治疗带来显著改变。 结肠癌(colon cancer)是一种常见的消化系统恶性肿瘤,发病率占胃肠道恶性肿瘤的第三位。随着饮食习惯的改变和人口老龄
Cell-Stem-Cell:叩开干细胞的家门
人类造血干细胞(HSC)可以通过造血过程生成成熟的血细胞,包括免疫系统的细胞。多年以来,科学家们一直在尝试解析调控造血干细胞功能和分化的具体机制。但这项工作并不简单,因为HSC只存在于骨髓的特殊区域(niche),体外培养很难重现这样的环境。 要对人类造血干细胞进行深入分析,就需要一个能够移植
Cell-stem-cell:纯化人类细胞新技术
多能干细胞研究之所以流行是因为在生物医学研究中,多能干细胞能够分化为任意细胞类型。但一些代表性的分化方法会导致异质性细胞群体的出现,这时候就需要将目的细胞进行纯化分离。 目前对这类细胞进行分离主要根据细胞表面的特征性受体不同,利用抗体进行分离筛选。但在一些情况下,这种分离方法的纯化水平很低,并
Cell-Stem-Cell:揭示细胞炎症记忆机制
当组织经历炎症时,它的细胞会记得。在炎症的高峰期,细胞将蛋白质固定在其遗传物质上,并将它们在最后斗争中所处的位置记下来。下次接触时,炎症记忆就会启动。这些细胞利用以前的经验来更有效地做出反应,即使是对它们以前从未遇到过的威胁也是如此。如果皮肤以前接触过刺激物,如毒素或病原体,它就会更快地愈合伤口
Cell-Stem-Cell:-帕金森发病机制新见解
在帕金森等神经退行性疾病中,特定的神经元的死亡会导致患者出现运动问题和其他症状。长期以来,科学家们致力于发现这些神经元死亡的原因。 最近,来自洛克菲勒大学的研究人员发现,帕金森氏病中受影响的神经元实际上会处于“关闭”而非“完全死亡”的状态。研究小组发现,这些不死的神经元释放出的化学物质也会使他
Cell-Stem-Cell发表重编程重要成果
再生医学旨在通过细胞移植替换人体内受损的细胞、组织和器官,是一个发展迅速的新兴领域。胚胎干细胞(ESC)能够形成胎儿体内所有类型的细胞、组织和器官,被视为细胞治疗的宝贵资源。然而ESC在实际应用中遭遇了两大瓶颈,免疫排斥和伦理问题。 细胞重编程可以绕过人类胚胎干细胞的伦理争议,近年来受到了广泛
Isolation-of-cell-nuclei-for-the-application-in-the-cellfree-system
Characteristics of the procedurePreparation of isolated nuclei - procedurePreparation of radioactive labeled nucleiMaterial Characteristics of the pro
Cosmid-Cloning:-Cell-preparation,-DNA-packaging,-and-Cell-Transfection
Cosmid Cloning: Cell preparation, DNA packaging, and Cell TransfectionProtocol taken from Stratagene's Gigapack packaging extracts instruction man
Method:-Reactivating-Cell-Lines-and-Cell-Growth-for-DNA-Preparation
Purpose:Cell lines are reactivated and grown to a count of 1 x 108 cells. The cells are pelleted and stored frozen at -80 degrees C prior to DNA extra
Competent-Cell-Preparation
实验概要Competent cells are those that possess more easily altered cell walls that DNA can be passed through easily. These cells readily incorporate f
Cell-Viability-Assay
Dye exclusiona cell suspension is mixed with trypan blue and examined by low-power microscopyMaterialscellsPBSM3hemocytometer0.4 % trypan blue in PBSm
Microscopes-in-Cell-Biology
Microscopes in Cell BiologyIntroductionMicroscopy has a major role in the study of cells. From the very beginning, researchers have tried to develop w
CELL-MEMBRANE-PREPARATION
I. Solutions: A. Ca and Mg free Phosphate Buffered Saline (PBS) solution, buffered with 0.02M Hepes. pH=7.4 B. Ca and Mg free PBS, buffered with
Staining-Methods-for-cell
death Z. Xia 10/2/95The simplest way: trypan blue. Dead cells stain blueNon-fixed cells: FDA(fluorescein diacetate)-green, alive cells; P.I. (propidiu
Cell-Sorting-By-FACS
Currently, the Moflo instrument (Dakocytomation) is used to sort cells at the AECOM FACS facility.Sorting is performed by the person in charge at the
Cell-counting/plating
OverviewCount the number of viable cells in a culture via dilution plating. The following assumes E. coli cells but it should apply to any type of cel
Working-Cell-Bank
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.
Bacterial-cell-culture
MaterialsGlass culture tubes with metal caps and labelsGrowth medium, from media room or customizedGlass pipette tubesParafilmEquipmentVortexerFireboy
Maintenance-of-Cell-Culture
Maintenance of Cell CultureAuthor: Nanci DonackiSource: Contributed by Nanci DonackiDate Added: Tue May 14 2002Date Modified: Tue Apr 27 2004Abstract:
Master-Cell-Bank
PurposeTo describe the preparation of a Master Cell BankSafetySee SP 09-001 for lab safety considerations for the cell culture lab.EquipmentLaminar Fl
Protocol-for-Cell-Fusion
Healthy Sp2/0 cells should be rapidly growing by this time. Sp 2/0 cells should be started about two weeks before the cell fusion. Every two days, the
Cell-Cycles--Introduction
The onion root tip and the whitefish blastula remain as the standard introduction to the study of mitosis. The onion has easily observable chromosomes