We narrowed to 859 results for: ELL

...purification as well as reversibly regulation of endogenous signaling activity in cells.  Let’s shed some...OptoNBs to control cell signaling The second application for OptoNBs takes us into cells: light-based control...their use for protein purification and controlling cell signaling. Key components of OptoNBs OptoNBs have...can bind, it co-localizes with its target at the cell membrane and when the OptoNB can’t bind, it localizes... over-activated in cancer due to its involved in cell proliferation and differentiation.  Since Ras is...They expressed this OptoNB-SOS fusion protein in cells that expressed membrane-localized mCherry. With ...With darkness, SOS binds Ras and initiates the extracellular signaling-regulated kinase (ERK) signaling cascade...

... life that remained unexplored. Using new single-cell sequencing approaches, the lab was able to eliminate... and so the lab organized a sampling trip to Yellowstone National Park (YNP). Extremophiles - phylogenetically...sample was separated into smaller samples of 5-10 cells each for sequencing, allowing for lower complexity...

...Because each cell can have multiple copies of the transgene that will recombine independently, cells may acquire...expressed. Each cell remains the same color for its entire lifetime and daughter cells retain the same... the fate mapping of cell populations over time. The ability to track single cell dynamics at the organism...expressed in a single cell maintains its color over the entire length of the cell, even axons of up to ... specific cell type. The Confetti mouse was first used to describe the self-renewal of cells in the intestinal...for tracking the fate of Langerhans cells. In the Ubow mouse, cells expressing YFP, CFP, and RFP are not... of CFP++ cells permitted researchers to longitudinally map the turnover of Langerhans cells in the dermis...

...transfected cells, we count the number of tag-positive cells (tag ICC) as a percentage of total cells in the...pre-assembled in a 96-well plate. Glioma stem cells were transfected in 96-well format using an Amaxa ...Deliver csRNP into cells: Prepare cells for transfection, add csRNP and ssODN to the cell suspension, transfect...Proteins - the workhorses of the cell – never work alone in the cellular milieu. It is, therefore, critical...epitope tagging in mammalian stem cells. For easy scalability to the 96-well format, we developed a “TAG-IN...csRNP plus ssODN, is then transfected into stem cells. Cells are allowed to recover for 2-5 days and then...efficiently these components are delivered into cells; for each cell type, the transfection/delivery step needs...

...researcher at Imperial College London, Dr. Tom Ellis. Dr. Ellis does research in synthetic biology and bioengineering...and Addgene  Many thanks to our guest, Tom Ellis! Dr. Ellis is a lead researcher at the Centre for Synthetic...yeast chromosome. Listen to learn more about Dr. Ellis, synthetic biology, synthetic chromosomes, and obstacles...academic researcher. Listen to the interview with Tom Ellis Podcast breakdown Intro: How Tom ended up in academia...techniques. Chapter 4: Research projects underway in the Ellis lab including yeast and E. coli engineering, microbial...specialising in engineering gene regulation in yeast. Dr. Ellis is now one of the world's leading yeast researchers...Resources at Addgene.org Find Plasmids from the Ellis Lab Find Synthetic Biology Kits Browse Our Synthetic...

...where GFP labelled B cells were in mounted slices of these organs. These GFP labelled cells could also...labeling T cells, B cells, and antigen presenting cells, scientists have been able to decypher cellular dynamics...tracked by cell sorter giving immunologists the ability to count cells and statistically analyze cell movements...fast T cells could jump from one antigen presenting cell to another. Indeed, we now know that T cells are...2016)? How do dendritic cells migrate to lymph nodes to activate T cells (Celli et al 2008, Kitano et al...degradation within labelled cells limits the timespan available for tracking certain cell types. Another ...or off in cells expressing Cre. The result of a system like this is a mosaic of cells labelled with different...

...vectors (right) are transduced to target cells. Within target cells, Cas9 machinery is transiently expressed...-transformed mammalian cells. These viral vector systems also work equally well in dividing and quiescent...in order to facilitate its entry into the target cells (Beatty et al., 2012). These features make AdV an... complexes into transformed and non-transformed cells yielded rates of targeted mutagenesis similar to...nuclease-induced gene disruption frequencies in the various cell types ranged from 18% to 65% (Maggio et al., 2014... leads to a vast majority of AdV-modified human cells being subjected to scarless homology-directed genome...quiescent, post-mitotic mammalian cells. Applications of CRISPR delivery by adenoviral vectors Since then...

...primary human cells  Cell therapy approaches can use base editors to correct mutations in stem cells and return... a way to improve editing in primary human cells (Gaudelli et al., 2020). One of the widely used base ...base editors with improved editing in cell lines Nicole Gaudelli, the Associate Director and Head of Gene...primary human cell editing, the researchers tested ABE8 in CD34+ hematopoietic stem cells. ABE8 efficiently... In addition to stem cells the authors targeted 6 genes in primary human T cells using 8 selected ABE8s...to edit primary human T cells efficiently makes it a promising tool for T cell therapy development.  Reducing...base changes in cellular DNA and RNA dependent or independent of the gRNA used (Gaudelli et al., 2017)....

...Induction of Human Germ Cell Fate from Pluripotent Stem Cells. Cell Stem Cell, 2015. 17(2): p. 178-94....differentiation of human ES cells and iPS cells into mature pancreatic insulin-producing cells. Cell Res, 2009. 19(...blood cells, and renal epithelial cells from urine are some of the easily isolated somatic cells that ...some of these cell types [13]:  Germ cells [14] Hepatocytes [15] Pancreatic β-cells [16] Intestinal...differentiated cell to a different cell type. While transdifferentiation is suited for switching cell types between... differentiation of human cells with synthetic modified mRNA. Cell Stem Cell, 2010. 7(5): p. 618-30. PubMed...et al., Reprogramming of T cells from human peripheral blood. Cell Stem Cell, 2010. 7(1): p. 15-9. PubMed...

... the single-cell level can aid in drawing connections between signaling activity and cell phenotype. One...Covert, M.W. (2018). Live-cell measurements of kinase activity in single cells using translocation reporters... One method for monitoring live single-cell kinase activity is FRET, but FRET reporters are challenging...their Kinase Translocation Reporters (KTRs) whose cellular localization serves as a proxy measurement of ... used to measure kinase activity in specific subcellular compartments. Second, because KTRs shuttle between...when designing KTR experiments. Third, KTRs are not well suited for monitoring kinase activity that occurs...

...Pharmacological Sciences, a Cell Press reviews journal. Stem cells are special types of cells that can develop ...specialized cell types [2]. We general speak of 4 levels of stem cell potency: Totipotency: When a cell has ...pluripotent cells can be thought of as descendants of totipotent cells. An example of pluripotent cells is embryonic...differentiate into only one cell type. Muscle satellite cells found in the adult muscle are unipotent. They can differentiate... into myogenic precursor cells [5]. Classification of stem cells Stem cells are classified into two broad...Embryonic stem cells ESCs are pluripotent stem cells that are able to form all adult cell types and are... Adult stem cells (ASCs) Also known as somatic stem cells, these multipotent stem cells are located ...

...Pluripotent Stem Cells from Blood Cells: An Efficient Protocol Using Serial Plating of Reprogrammed Cells by Centrifugation...human-induced pluripotent stem cells from cord blood and peripheral blood cells. Stem Cells, 2013. 31(3): p. 458...possible to reprogram differentiated cells into induced pluripotent stem cells (iPSCs) by the addition of reprogramming... somatic cells that are otherwise difficult to obtain. These can then be used to perform cell therapy ...in vitro. Find stem cell plasmids at Addgene Many sources of adult somatic cells have been probed for...Efficient human iPS cell derivation by a non-integrating plasmid from blood cells with unique epigenetic...stem cells from a small amount of human peripheral blood using a combination of activated T cells and ...

... of the cell and/or they cannot tumble in 720°, i.e. they are on a membrane or in an organelle, then their...transcriptional reporter or as a general cytoplasmic label of cells, there's no problem. You're OK. However, if you ...(POI) to GFP to study the protein's behavior in cells, in solution or something in between, you are using...fluorescent protein (FP) could be forming dimers in cells. Why should you care? Three simple ways a dimeric...nanomolar Kd will exist primarily as a dimer in cells while a protein with a high micromolar or low millimolar...millimolar Kd is unlikely to form dimers in a cell. The Kd of EGFP is 0.11 mM [2]. Following the simple...might think EGFP is unlikely to form dimers in a cell. Unfortunately, things are not quite so simple. ...

... rising intracellular calcium levels within the cell. When levels of Ca2+ are high in the cell, calcineurin...infection (MOI) during cell library construction to ensure that the majority of cells receive one gRNA. The... of a genetically-defined subset of cells. By labeling fewer cells in a population, it’s easier to visualize...lengths, the density of cells that are labeled can be altered to dense (45% of cells labeled), intermediate...or aging cell populations. Figure 3: Micrographs of wild type (top panels) and cells with high...barcodes (iBARs) in their loop region. After infecting cells with sgRNAiBAR library containing lentiviral vectors...high MOI, which is beneficial for a low number of cells and in vivo settings. Find the sgRNAiBAR library...

...plot of CD3 (T cell marker) versus CD19 (B cell marker) to separate the B cell and T cell into distinct...separate the B cell population into progenitor B cells, immature B cells, plasma cells or others.   ...determining cell health, analyzing cell cycle stages, and detecting specific populations of cells in a complex... the cellular level, it cannot be used for subcellular analysis such as morphology or subcellular localization.... As cells pass through the flow cell the size of the sample stream is reduced forcing the cells to line... photons varies from cell to cell depending on the level of fluorescence. A cell expressing high levels...compatible with 96-well plates as collection vessels and can sort single cells into each well allowing users...

...out all CD8+ T cells from a mix of CD8+ T cells, CD4+ T cells, B cells, and dendritic cells. In this case...dumped”. From left to right: B cell, CD4+ T cell, dendritic cell, CD8+ T cell. Created using biorender.com...in flow cytometry are cell proliferation and cell viability. Unlike intracellular labeling, dye staining...be done on live cells. For cellular proliferation, esterified dyes that can enter cells freely are typically...amines on the cell surface, which yields a much weaker signal on live cells compared to dead cells. As a result...comes to labeling cells for flow cytometric analysis, the most common method is a cell surface label, where...through the cell membrane freely, while others require a permeabilized membrane to enter cells. Depending...

...activity, and consists of other cell types, especially immune cells and cells of epithelial origin. Suppressing...turns off T cell function upon interaction with APCs. Furthermore, tumor cells alter their cell-surface proteome...molecules needed for T cell effector function. Cancer cells also produce programmed cell death ligand (PD-L1... activity of CTLs and NK cells. These cells would normally kill cancer cells but are directed not to through...to use whole cell therapeutics consisting of various types of immune cells. Dendritic cells (DCs) are particularly... intravenously. B cells and T cells activated ex vivo are also contestants for cell-based immunotherapy... include: Cell heterogeneity Tumors are composed of a wide variety of cell types. This cell heterogeneity...

...Many cell types can be found in the tumor microenvironment (tumor cells, immune cells, blood cells and ...about 53% of my cells are dendritic cells and ~13% are CD8+ T cells. Around 34% of the cells are neither ...neither of the two cell types (likely B cells and others). Almost no cells stain positively for both markers...measure your cells of interest. In many experiments you’ll be working with a heterogeneous cell population...processed piece of tissue, where cells are present that vary in cell type, size, and marker proteins. ...analyzing a homogenous cell population in culture, it is normal to observe diversity in cell size, marker expression...illuminates the passing cell with a laser and detects the light scattered by that cell at a low angle (FSC...

...Pluripotent Stem Cells by Direct Delivery of Reprogramming Proteins." Cell Stem Cell 4, no. 6 (2009): ...Jaenisch. "Induced Pluripotent Stem Cells Meet Genome Editing." Cell Stem Cell 18, no. 5 (2016): 573-86. PubMed...Reprogram Peripheral Blood Cells Check Out Our Interview with Stem Cell Researcher Darrell Kotton Four Factors... express a cocktail of stem cell reprogramming factors and wait for cells to de-differentiate. However...transgene-free and vector-free cells Genome integration Need to sequence cells to verify excision didn’t ...vector-free cells No genomic integration Can be difficult to fully remove virus from cells Plasmid Non-integrating...transduces a wide range of cell types and replicates in the cytoplasm independent of the cell cycle. A challenge...

...label an intracellular target.   Figure 1: HCT 116 WT and SYT1 KO cells were labelled with a green...levels in your cell lines, you can consider a cell treatment approach. If there is a cell treatment (e....antibody shown to perform well in one set of conditions may not perform as well in other conditions. For...select a candidate cell line (e.g. DepMap) – you’ll need to ensure that the parental cell lines of your chosen...the parental cell line, but not in the iso-genic knockout control. This can involve cell surface labeling...selectivity for cell surface labeling may become less selective if used in intracellular labeling because...because the intracellular compartment may contain cross-reacting antigens not present on the cell surface....

...performed on whole-cell extracts from the initial stable cell pool (pool) and from individual cell expansions ... in several human cancers) in A549 cells (a human lung cancer cell line), armed only with viruses obtained...need our A549 cells to express Cas9. In these particular experiments, we generated A549 cells stably expressing...52962-LV, Figure 1). Some cells were then used to generate a monoclonal cell lines by limiting dilution...The rest of the cells were frozen down. Figure 1: Cas9 expression in A549 cells transduced with...blotting was performed on whole-cell extracts from stable pools of A549 cells transduced with Cas9 expressing...A549 cells are relatively easy to transduce. I ended up with too many Cas9 integrations per cell, and ...

...experiments including subcellular visualization of 6 different organelles, a cell cycle indicator for mouse...recorded in the cell's DNA under the right conditions, and could initiate specified cellular processes or...Understanding intracellular pH regulation is important as pH regulation has roles in many cellular functions...signaling pathways to the cell cycle. Good tools for measuring intracellular pH are required in order ...useful tools for light-mediated subcellular localization in mammalian cell culture and reversible control...in live cells is that one can now follow movement of two or more targeted loci during the cell cycle or...mammalian cells, yeast, and Drosophila. Synchronization of secretory protein traffic in mammalian cells The...

...mycoplasma contamination in your cell culture or you are about to begin a new cell culture project. If mycoplasmas...present in most of the cell culture facilities, tissue culture labs and every cell culturist has to deal...cost-effective (Sung, 2006). The sensor cell-based method uses specialized cells that can detect the presence of... should be made available for cell culturing and maintenance of the cell lines. Providing such an environment...Photo by Kate Harten DeMaio. Cell lines and reagents Examine your cell line stock for mycoplasma contamination...cryopreserved vials of the cell lines even though the viability of cryopreserved cells decreases with every ...cause mycoplasma infection from one cell line to another. Multiple cell lines should not be stored in a single...

...by source cell based on single-cell RNA-seq data. In addition to unique proteins on each cell type, the...regions, cell types, and tissues. Find cell-surface HRP plasmids here! Wu, L., et al. (2025) The cell-surface...this post: Cell-surface protein labeling tools for neurons and astrocytes Nerve-to-cancer cell mitochondrial...AAV-CRISPRa-engineered fat cells fight cancer Frugal CRISPR kit for classrooms Cell-surface proteomics for...for neurons and astrocytes By Mike Lacy Cell-cell interactions underlie many kinds of tissue function,...mapped their cell-surface proteomes (Wu et al., 2025). The team expressed extracellularly-anchored horseradish...the cell-surface shared proteome of astrocytes and neurons (CS SPAN) featured extracellular matrix proteins...

...-B+ cells, and A+B+ cells, but no cells that are A+B-.      Figure 3: It's often easier to identify...population of B cells and dendritic cells (DCs) in the lower middle right. DCs and B cells are HLA-DR+ and...single cells in a population. It can be used to measure protein expression, identify rare cells, or even...looking for cells in a sample that are negative for marker A and positive for marker B, or A-B+ cells. If you...the cell populations as a guide  (Figure 3.) You can see that in our dot plot, we have A-B- cells, A-B...the first step is to separate cells from debris and roughly group the cells by size. This is done using ... and FSC are measured to differentiate cells from debris. Cells are gated, and in the gated population...

...plasmids for RapID EXCELL: Proximity labeling for the detection of cell-cell interactions EXCELL is an enzyme-mediated...contexts.  Proximity labelling relies on the labelling of neighboring proteins within a cell with biotin. Biotin...enzyme-mediated proximity cell labeling strategy to detect cell-cell interactions in vivo (Ge et al., 2019...et al. "Enzyme-Mediated Intercellular Proximity Labeling for Detecting Cell–Cell Interactions." Journal...avidin, proximity labelling can capture weak/transient protein interactions as well as be used for both...a bait protein fused to BirA* in cells and then incubate those cells with exogenous biotin. After a few...BioID and APEX have been developed as well as new proximity labelling techniques. These newer tools are also...

...-dividing cells. The ability to infect non-dividing cells is not restricted to in vitro cell culture as...target cells. If you are transducing non-adherent cells you might need to centrifuge your cells with the...favourite gene into your favourite cell line or into primary cells, this blog article will give you some...infect both dividing and non-dividing cells, including stem cells. These properties make lentiviral vectors...immortalized cells lines but reach their limits when it comes to transferring DNA into primary cells or non-...non-dividing cells. To target these un-transfectable cells, labs use viral vectors and particularly retroviral...will first need to transfect producing cells, usually 293T cells, with your transfer plasmid and your packaging...

...produced using complex mixtures derived from cells or using live cells. There are several types of expression...consists of transfecting cells with your DNA template of choice and allowing these cells to transcribe, translate...demanding cell culture conditions compared to other systems. Insect expression systems Insect cells can also...coli or yeast cells. The only problem with baculovirus systems is that the infected host cell is eventually...eventually lysed. Cell lysis halts protein production, but there are non-lytic insect cell expression systems...Sf21, Hi-5 cells)  that allow for continuous expression of genes integrated into the insect cell genome. ...that is then transformed into a bacterial cell. Transformed cells propagate, are induced to produce your ...

... HEK293FT cells expressing a single gRNA targeting a single gene. The gRNA expressing cells were then ...plasmid to generate a population of mutant cells. The mutant cells were treated with WNV at a dose and duration...regulate the ability of WNV to induce cell death in infected cells (SEL1L, UBE2J1, EMC3, EMC2, DERL2, UBE2G2...screens in human cells. General information regarding how to use a CRISPR pooled library as well as criteria...small GTPases involved in cell signaling pathways that control many cellular processes such as differentiation...community as well. The pooled library, designed to be used with cultured Drosophila cells, targets 13,...and analysing autophagy of cytosol and organelles in yeast cells. Named after the brightly-coloured Australian...

...transfected cells may be considered an entirely new cell line from that of the original parental cells. Positive...cultured mammalian cells. Of course, these mammalian vectors must be compatible with the cell type they are...bacterial cells); however, the techniques and reagents vary. Plasmid transfection into mammalian cells is fairly...expression levels in the cells. Ideally, the chosen reporter is unique to the cell, is expressed from the...components expressed in trans within the cell for effective replication. Cell lines expressing the Epstein–Barr...mammalian cells To achieve stable transfection, there should be a selective pressure to force cells to incorporate...(basically growing cells in various concentrations of the selection reagent). Cells should die within ...