...times), depending on the cell line so old cells should be retired! Conversely, cells younger than the 3rd ... Here are some tips for cell culture that will hopefully help you keep a well organized lab and contamination...hands! You should additionally remove all jewellery as well as that watch you’re wearing before you start...Make sure cells don't stay out too long While you’re preparing things, make sure your cells don’t stay...contaminants. Set up a routine to split cells Don’t be lazy about splitting cells, instead try to form a routine...’s best to split cells before the plates are more than 80-85% confluent because cells like their space...results. Most cell culture media contain the pH indicator phenol red (pH range 6.0 (yellow) - 8.0 (red)...

...into 96-well plates, is extremely time- and resource-consumptive, since only wells with one cell can give...add a drop of serum to each well in the 48-well plate; rapidly growing cells such as HEK and CHO do not...while nearly all endocrine cells do. While not all of the wells in the 48-well plate will grow up, most ...Biosciences) to transition from a 48-well cell plate to a 96-well assay plate. We generally freeze at ... a wide variety of cell lines, from HEK to CHO cells to neural and endocrine cells such as AtT-20, PC12...then handled. Additionally, many cell lines, especially the endocrine cell lines we most commonly work with...and glucose. If we circled well-separated clones containing more than 50 cells (visible to the naked eye...

...psMEK1 in these same cells by 24-48 hours exposure to blue light also induced tail swelling in ~75% of worms...of Multiple Kinase Activities in Live Single Cells." Cell 157, no. 7 (2014): 1724-734. PubMed PMID: 24949979...Signal transduction pathways are a lot like cell phone networks. Protein kinases deliver messages to ... dimeric Dronpa is less prone to aggregation in cells compared to the tetrameric Dronpa it was derived...inhibitors, psMEK1 and ERK KTR-mRuby2 expressing cells were incubated with an inhibitor of choice, exposed...inactivation, and then decreases. Treatment of the cells with a PP1/PP2A inhibitor leads to maintenance of... use rectal bacterial infection to induce tail swelling in C. elegans, but activation of Raf-MEK-ERK signaling...

...and analyzing autophagy of cytosol and organelles in yeast cells. Autophagy (Greek for “self-eating”) is...cytosol and organelles to the vacuole/lysosome for degradation and recycling. The key to Rosella’s autophagy-sensing...with the vacuole or lysosome. Rosella fluorescent properties Rosella is a dual color-emission biosensor...portion of Rosella: it will emit red fluorescence regardless of its localization in the cell. SEP’s pH ...color fluorescence Rosella emits based on its localization. Table 1: Summary of Rosella’s excitation and ...fluorescent properties of Rosella.   Table 2: Effect of Localization on Rosella’s fluorescence emission. ...Lysosome  ~4.8  Red    Using Rosella to study autophagy in yeast Rosella is targeted to the cytosol when...

...that already do mammalian cell culture. HEK-293T cells are the most common cells used in viral production...versus insect cells for viral production Consideration Mammalian cells Insect cells Viruses AAV ...type of cells that will be used to make the virus. Viruses can be produced in many different cell types,...produced in bacteria cells. However, some viruses can be produced in multiple different cell types, including...you make an informed decision. Mammalian cells Mammalian cells are a great option for viral production,...production in mammalian cells is relatively quick. After transfection, HEK-293T cells start producing virus...using qPCR or digital droplet PCR. Insect cells Insect cells are a less common option for the generation...

...varying across cell types. Variance can be caused by cell cycle rates; rapidly diving cells will have higher... of your cells. Enrich S-phase cells HR operates predominantly in S and G2 phase of the cell cycle, when...HDR events, ensure cells are actively cycling through the cell cycle stages. If cells are overly confluent...way to make a knock-in cell line is to utilize the built-in repair pathway cells already have for repairing...than quiescent cells. It is important to know that HR is often mutated in cancer cells, specifically in...keeping an eye on those cells! To take this one step further, you can inhibit cell cycle regulatory proteins...negative outcomes on viability if cells are arrested too long. Prolonged cell cycle arrest can lead to apoptosis...

...the SeqWell website to learn more about our plexWell kits and services! Many thanks to Joe Mellor, our...our guest writer from seqWell Inc. Joe Mellor is the Founder and CEO of seqWell, Inc. He is a sequencing... contributed by guest blogger Joe Mellor, Founder and CEO of seqWell Inc. Plasmids and PCR products are...DNA-barcoding step that uniquely labels DNA from each well of a 96-well plate. Then, samples from several plates are... to 1000s of samples individually, plexWell™ reduces every 96 well plate to a single tube after the first...across samples, NGS data obtained via plexWell™ libraries is well suited to large-scale de novo assemblies...from plexWell™ NGS data. Once Addgene produces plates of plasmid DNA, they are shipped to seqWell, where...

...Institute for Cell Science. Learn more by visiting the Allen Cell Explorer at allencell.org and the Allen...stem cell lines we’ve made using them are available as part of the Allen Cell Collection at Coriell. More... hiPS cell lines generated using these plasmids, please visit the Cell Catalog on the Allen Cell Explorer... tagging to elucidate cellular structures. Overexpression methods flood the cell with protein, which can... in human cell lines. Furthermore, the quality control necessary to ensure the edited cells are behaving... and images generated from these cell lines can be found in the Cell Catalog on our data portal. The plasmids...

...prevent stem cell lines from becoming the new HeLa cells?), genome engineering and stem cells, and the difficulty... Podcast Interview with Stem Cell Researcher Darrell Kotton 2. Stem cell scientists care about patients... landmark Cell paper showing that it was possible to generate induced pluripotent stem cells (iPSCs) capable...forming nearly all cell types in the body from otherwise terminally differentiated cells simply by expressing... happening. Stem cells scientists have certainly not lost site of that. 3. Stem cell science is hard, ...sharing of his OSKM factors have affected the stem cell community – a community largely created due to Yamanaka...understatement. Multiple speakers from top minds in the stem cell field have described the Yamanaka paper as "life...

... do so, their T-cells were grown in vitro, their mutations corrected, and the T-cells were transferred...functioning T cell repertoire (1). In this example, it was possible to transduce the T-cells outside the...a wide range of cell types including but not limited to muscle, liver, and brain cells. There are a multitude...chain (c) and is characterized by a lack of immune cell development and function. To date, gene therapy ...that can deliver gene therapies directly to the cells that need them. Adeno-associated virus (AAV) – based...delivery of nucleic acid cargo (DNA or RNA) to target cells has been challenging. A variety of vector delivery... delivery vehicles with great safety profiles as well as other benefits. What makes AAV vectors great...

...single genetically-defined subset of cells. By labeling fewer cells in a population, it’s easier to visualize...non-overlapping cells. While transgenic animals are commonly used to specifically manipulate a cell type of interest...expressed. In cells where the stop cassette remains, the effector is not expressed and the cells are not labeled...sparse labeling of the cell population that expresses SPARC and the fraction of cells that will be labeled... interest in an organism, all cells of that type are affected. Previous tools to overcome this restraint... of the gene construct. A predictable number of cells will express the effector or retain the stop cassette...tool that allows for the labeling of a subset of cells with the same genetic makeup, overcomes all of these...

...hematopoietic stem cells with a lentiviral vector containing a gRNA. These transduced stem cells can be implanted...Annotation of genes in immune cells typically involves the creation of germline knockout mice, which ...CRISPR-based systems enable gene knockout in immune cells in a high-throughput manner, but these systems have..., ubiquitous knockout of single genes in immune cells in vivo (LaFleur et al., 2019a and LaFleur et al...many genes have different functions in different cell types, at different times, and in combination with... L-CHIME Knocks out a single gene in defined cell types (lineage-based) pXPR_070 Violet-excited...benchmarked on positive control genes in CD4+ and CD8+ T cells. To demonstrate the power of these systems to investigate...

...HEK293 cell culture and in live zebrafish. For cell culture experiments, only dL5**-expressing cells treated...inactivate target proteins or cells while having little effect on neighboring cells. The photosensitizer used...Here Light-induced cell ablation with MG-2I-dL5** He et al tested out light-induced cell ablation with MG...effective killing of dL5** cells without death of neighboring bystander wild-type cells.   Zebrafish experiments...fewer mCer3-labeled cells in their hearts 24 hours post treatment and no mCer3 cells present 96 hours post...increase cell ablation efficiency, but dL5** phototoxocity is induced when expressed on the cell surface...protein inactivation/cell ablation while having limited collateral damage to bystander cells. Are you ready ...

...never considered the sex of their cells. For one thing, cells and cell lines degenerate over time—and sex... effects of using all female cells and tissues, specifically in stem cell therapies. Let’s go back to ...therapeutic capacity of stem cells. Yet, very few researchers consider the sex of their cells when doing experiments—which...sexes in basic research is excellent design), but they used all female stem cells—this was an unconscious... stem cells. Nor did they detect important differences in function between male and female cells. The ...experiment. In the case of stem cells, these factors may include cell type, the disease being treated,...sex of cells and tissues—when that information is reliable—is important to ensuring excellence in basic...

...gain access to some cells and tissues, such as human induced pluripotent stem cells (hiPSCs). Nanoblades... into particles at the cell membrane. Mature Nanoblades then bud into the cell culture supernatant and... Addgene. Genome editing primary cells with Nanoblades Primary cells are often refractory to gene delivery...mouse bone marrow (BM) cells, primary human hepatocytes, and hematopoietic stem cells (HSCs) using Nanoblades...-70% for these four cell types (Table 1). Additionally, hiPSCs and mouse BM cells still behaved like iPSCs...Primary cell type Gene targeted by guide Editing efficiency hiPSCs  EMX1  67% Mouse BM cells from GFP...mouse BM cells when using a gRNA targeting the Fto gene, while editing was not detected in cells electroporated...

...sequence change the cell must undergo homology-directed repair (HDR), a distinct cellular DNA repair pathway...incorporated into the edited genome. In mammalian cells such as stem cells, HDR is relatively rare and DSBs are predominantly...them into somatic cells affected by the disease and study what’s wrong with the cells. However, our excitement...Munich and Marc Tessier-Lavigne’s lab at the Rockefeller University in NYC. The CRISPR/Cas9 system is ...sequence-specific changes in human induced pluripotent stem cells (iPSCs). The CRISPR/Cas9 com­plex is very efficient... stranded breaks (DSBs) into genomic DNA in many cell types and often results in biallelic modifications... After genome editing with CRISPR/Cas9 in human cells was described in 2013 (Cong et al, Mai et al) we...

...CRISPR plasmids into MEL cells by electroporation, sort your transfected cells via FACS, primer validation...article "Generation of Genomic Deletions in Mammalian Cell Lines via CRISPR/Cas9" from the Journal of Visualized...CRISPR/Cas9 to create genomic deletions in mammalian cell lines. Below Bauer and Canver discuss the motivations...deletions is to produce monoallelic deletion clones. Cells with just a single intact copy at a given locus ...screening by conventional PCR. Biallelically disrupted cells can be easily identified. Even in the case of clones...methods for CRISPR design, cloning, and delivery, as well as their techniques for creating deletions, identifying... His lab studies the molecular genetics of blood cell development and disease. Learn more at his webpage...

...help in the capture of other rare cell types, like stem cells or cells infected with malaria or other parasites...capture cancerous cells expressing low levels of tumor antigen. I asked Howarth to tell us more about SpyLigase...looking at, magnetic isolation of circulating tumor cells, we found that the binding stability really mattered... in the pili that they use to anchor on to host cells. Addgene: Were there any major hurdles along the... donor for keeping going while we worked out the cell capture system.) Cancer and other applications Addgene...cancer? Howarth: The capture of circulating tumor cells (CTCs) is going to have a big impact on our understanding...Addgene. Howarth: We submit all our plasmids that may well be of use to others to Addgene. I am a big fan; ...

... competent cells (protocol)  Transformation of electrocompetent cells (protocol)  Cells prepared using...plasmid that transforms well in other competent cells) to ensure that your cells can be readily transformed...to make your own competent cells It’s easy to make your own competent cells. If you need a high efficiency...purchasing competent cells. However, for most everyday cloning, homemade competent cells will work just fine...Preparing chemically competent cells (protocol)  Preparing electrocompetent cells (protocol)  Untergasser...of chemically competent cells (protocol) Preparation of electrocompetent cells (protocol) At Addgene...Set  from Zymo Research to make competent cells because cells prepared using this kit can be transformed...

...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...