New format, same high quality! You may notice that your kit contents and packaging look slightly different from previous orders. We are currently updating the format of select EasySep? Mouse kits to include a Mouse FcR blocker instead of Normal Rat Serum. With this change, all components will now be shipped in a single package, while providing the same cell isolation performance as before.
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Easily and efficiently isolate highly purified mouse T cells from single-cell suspensions of splenocytes or other tissues by immunomagnetic negative selection, with the EasySep? Mouse T Cell Isolation Kit. Widely used in published research for more than 20 years, EasySep? combines the specificity of monoclonal antibodies with the simplicity of a column-free magnetic system.
In this EasySep? negative selection procedure, unwanted cells are labeled with antibody complexes and magnetic particles. Unwanted cells expressing the following markers are targeted for removal: CD11b, CD45R, Ter119, CD49b, CD19, and CD24. The magnetically labeled cells are then separated from the untouched desired mouse T cells by using an EasySep? magnet and simply pouring or pipetting the desired cells into a new tube. Following magnetic cell isolation in as little as 15 minutes, the desired T cells are ready for downstream applications such as flow cytometry, culture, and cell-based experiments.
Learn more about how immunomagnetic EasySep? technology works or how to fully automate immunomagnetic cell isolation with RoboSep?. Explore additional products optimized for your workflow, including culture media, supplements, antibodies, and more.
Figure 1.Typical EasySep? Mouse T Cell Isolation Profile
Starting with mouse splenocytes, the T cell content (CD3+CD19-) of the isolated fraction is 96.6 ± 2.0% (mean ± SD), using the purple EasySep? magnet.
Figure 2.Cell Isolation Protocol Lengths
Typical time taken (in minutes) to isolate cells using select EasySep? kits.
Figure 3.ImmunoCult? Mouse T Cell Activator Kit Supports High Viability of Activated T Cells
Mouse T cells were isolated using EasySep? Mouse T Cell Isolation Kit (Catalog #19851), stimulated with ImmunoCult? Mouse T Cell Activator Kit (Catalog #100-1572), and cultured in IMDM + FBS formulation. Following 3 days of culture, the mean ± SD frequency of CD25+ cells was 91.9 ± 5.1% (n = 11) or 99.9 ± 0.1% (n = 5), when stimulated with ImmunoCult? Mouse CD3/CD28 T Cell Activator or ImmunoCult? Mouse CD3/CD28/CD2 T Cell Activator, respectively. Stimulated mouse T cells maintained expression levels of CD25 throughout the 7-day culture period.
Figure 4.Robust Expansion of EasySep?-Isolated Mouse T Cells Can Be Achieved Following Stimulation with ImmunoCult? Mouse T Cell Activator Kit
Mouse T cells isolated using EasySep? Mouse T Cell Isolation Kit (Catalog #19851) were expanded with ImmunoCult? Mouse T Cell Activator Kit (Catalog #100-1572) in IMDM + FBS formulation over 7 days. The number of viable cells was assessed every 2 - 3 days, and fresh medium supplemented with IL-2 was added. No additional ImmunoCult? Mouse T Cell Activator was added during the 7-day culture period. After 7 days in culture with ImmunoCult? Mouse CD3/CD28 T Cell Activator or ImmunoCult? Mouse CD3/CD28/CD2 T Cell Activator, stimulation resulted in a fold expansion of 23 ± 3.4 or 29.3 ± 4.8 (mean ± SEM, n = 6), respectively.
Figure 5.High Cell Proliferation is Observed in EasySep?-Isolated T cells After Stimulation with ImmunoCult? Mouse T Cell Activator
Mouse T cells isolated using EasySep? Mouse T Cell Isolation Kit (Catalog #19851) were labeled with CFDA-SE (Catalog #75003), stimulated with ImmunoCult? Mouse T Cell Activator Kit (Catalog #100-1572), and cultured in cultured in IMDM + FBS formulation. On Day 3, cells were harvested, stained with anti-mouse CD4 and CD8a antibodies, then measured by flow cytometry. Shown are CFDA-SE-labeled mouse T cells, gated on viable CD4+ (A) or CD8a+ (B) cells, cultured with no activator (top panel), with ImmunoCult? Mouse CD3/CD28 T Cell Activator (middle panel), or with ImmunoCult? Mouse CD3/CD28/CD2 T Cell Activator (bottom panel). Due to cell proliferation, the intensity of CFDA-SE signal is reduced by 50% for each cell division.
This product is designed for use in the following research area(s) as part
of the highlighted workflow stage(s). Explore these workflows to learn more about the other products we
offer to support each research area.
Can EasySep™ Streptavidin RapidSpheres™ be used for either positive or negative selection?
Currently, EasySep™ Streptavidin RapidSphere™ kits are only available for negative selection and work by targeting and removing unwanted cells.
How does the separation work?
Streptavidin RapidSphere™ magnetic particles are crosslinked to unwanted cells using biotinylated antibodies. When placed in the EasySep™ Magnet, labeled cells migrate to the wall of the tube. The unlabeled cells are then poured off into a new tube.
Which columns do I use?
The EasySep™ procedure is column-free. That's right - no columns!
How can I analyze the purity of my enriched sample?
The Product Information Sheet provided with each EasySep™ kit contains detailed staining information.
Can EasySep™ Streptavidin RapidSphere™ separations be automated?
Yes. RoboSep™, the fully automated cell separator, automates all EasySep™ labeling and cell separation steps.
Are cells isolated using EasySep™ RapidSphere™ products FACS-compatible?
Yes. Desired cells are unlabeled and ready to use in downstream applications, such as FACS analysis.
Can I alter the separation time in the magnet?
Yes; however, this may impact the kit's performance. The provided EasySep™ protocols have already been optimized to balance purity, recovery and time spent on the isolation.
A CARMIL2 gain-of-function mutation suffices to trigger most CD28 costimulatory functions in vivo
The Journal of Experimental Medicine 2025 May
Abstract
Zhang et al. demonstrate that the expression of a mutated CARMIL2 protein in CD28-deficient mice induces most of the developmental and functional consequences known to result from CD28 costimulation and in turn triggers potent tumor-specific T cell responses resistant to PD-1 and CTLA-4 blockade. Naive T cell activation requires both TCR and CD28 signals. The CARMIL2 cytosolic protein enables CD28-dependent activation of the NF-κB transcription factor via its ability to link CD28 to the CARD11 adaptor protein. Here, we developed mice expressing a mutation named Carmil2QE and mimicking a mutation found in human T cell malignancies. Naive T cells from Carmil2QE mice contained preformed CARMIL2QE-CARD11 complexes in numbers comparable to those assembling in wild-type T cells after CD28 engagement. Such ready-made CARMIL2QE-CARD11 complexes also formed in CD28-deficient mice where they unexpectedly induced most of the functions that normally result from CD28 engagement in a manner that remains antigen-dependent. In turn, tumor-specific T cells expressing Carmil2QE do not require CD28 engagement and thereby escape to both PD-1 and CTLA-4 inhibition. In conclusion, we uncovered the overarching role played by CARMIL2-CARD11 signals among those triggered by CD28 and exploited them to induce potent solid tumor–specific T cell responses in the absence of CD28 ligands and immune checkpoint inhibitors.
Targeting the disrupted Hippo signaling to prevent neoplastic renal epithelial cell immune evasion
Nature Communications 2025 Mar
Abstract
Large-scale cancer genetic/genomic studies demonstrated that papillary renal cell carcinoma (pRCC) is featured with a frequent shallow deletion of the upstream tumor suppressors of the Hippo/YAP signaling pathway, suggesting that this signaling pathway may play a role in pRCC development. Here we develop a transgenic mouse model with a renal epithelial cell-specific hyperactivation of YAP1 and find that hyperactivation of YAP1 can induce dedifferentiation and transformation of renal tubular epithelial cells leading to the development of pRCC. We analyze at the single-cell resolution the cellular landscape alterations during cancer initiation and progression. Our data indicate that the hyperactivated YAP1, via manipulating multiple signaling pathways, induces epithelial cell transformation, MDSC (Myeloid-derived suppressor cells) accumulation, and pRCC development. Interestingly, we find that depletion of MDSC blocks YAP1-induced kidney overgrowth and tumorigenesis. Inhibiting YAP1 activity with MGH-CP1, a recently developed TEAD inhibitor, impedes MDSC accumulation and suppresses tumor development. Our results identify the disrupted Hippo/YAP signaling as a major contributor to pRCC and suggest that targeting the disrupted Hippo pathway represents a plausible strategy to prevent and treat pRCC. Deletion of upstream tumor suppressors of the Hippo/YAP pathway is frequent in papillary renal cell carcinoma (pRCC). Here, the authors employ a transgenic mouse model, single-cell transcriptomics and public genomic datasets to show that targeting hyperactivated YAP1 prevents neoplastic renal epithelial cell immune evasion and impairs the development of pRCC.
Light-induced expression of gRNA allows for optogenetic gene editing of T lymphocytes in vivo
Nucleic Acids Research 2025 Mar
Abstract
AbstractThere is currently a lack of tools capable of perturbing genes in both a precise and a?spatiotemporal fashion. The flexibility of CRISPR (clustered regularly interspaced short palindromic repeats), coupled with light’s unparalleled spatiotemporal resolution deliverable from a controllable source, makes optogenetic CRISPR a well-suited solution for precise spatiotemporal gene perturbations. Here, we present a new optogenetic CRISPR tool (Blue Light-inducible Universal VPR-Improved Production of RGRs, BLU-VIPR)?that diverges from prevailing split-Cas design strategies and instead focuses on optogenetic regulation of guide RNA (gRNA) production. We engineered BLU-VIPR around a new potent blue-light?activated transcription factor (VPR-EL222) and ribozyme-flanked gRNA. The BLU-VIPR design is genetically encoded and ensures precise excision of multiple gRNAs from a single messenger RNA?transcript. This simplified spatiotemporal gene perturbation and allowed for several types of optogenetic CRISPR, including indels, CRISPRa, and base editing. BLU-VIPR also worked in vivo with cells previously intractable to optogenetic gene editing, achieving optogenetic gene editing in T lymphocytes in vivo. Graphical Abstract
Graphical Abstract
Hamster (Armenian) monoclonal IgG1 antibody against mouse CD3e
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EasySep? Mouse T Cell Isolation Kit
New format, same high quality! You may notice that your kit contents and packaging look slightly different from previous orders. We are currently updating the format of select EasySep? Mouse kits to include a Mouse FcR blocker instead of Normal Rat Serum. With this change, all components will now be shipped in a single package, while providing the same cell isolation performance as before.
Quality Statement:
PRODUCTS ARE FOR RESEARCH USE ONLY AND NOT INTENDED FOR HUMAN OR ANIMAL DIAGNOSTIC OR THERAPEUTIC USES UNLESS OTHERWISE STATED. FOR ADDITIONAL INFORMATION ON QUALITY AT 海角破解版, REFER TO WWW.海角破解版.COM/COMPLIANCE.