ImmunoCult™ Human CD3/CD28 T Cell Activator
Human T cell activation and expansion reagent
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ImmunoCult™ Human CD3/CD28 T Cell Activator -
Label for ImmunoCult™ Human CD3/CD28 T Cell Activator
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Overview
ImmunoCult™ Human CD3/CD28 T Cell Activator is designed to activate and expand human T cells in the absence of magnetic beads, feeder cells, or antigen. ImmunoCult™ Human CD3/CD28 T Cell Activator consists of soluble tetrameric antibody complexes that bind CD3 and CD28 cell surface ligands. Binding of the tetrameric antibody complexes results in the cross-linking of CD3 and CD28 cell surface ligands, thereby providing the required primary and co-stimulatory signals for T cell activation. Activated T cells can be expanded in ImmunoCult™-XF T Cell Expansion Medium or other media for culturing human T cells supplemented with cytokines.
The ImmunoCult™ Human CD3/CD28 T Cell Activator can be used on the Seahorse XF Analyzer to measure T cell activation response and is also available as part of the Agilent Seahorse XF Hu T Cell Activation Assay Kit.
This product is designed for cell therapy research applications following the recommendations of USP<1043> on Ancillary Materials, and we can currently work with you to qualify this reagent under an approved investigational new drug (IND) or clinical trial application (CTA).
This product aims to be developed as a cGMP-grade reagent for cellular therapy research. Learn more at www.stemcell.com/t-cell-therapy
The ImmunoCult™ Human CD3/CD28 T Cell Activator can be used on the Seahorse XF Analyzer to measure T cell activation response and is also available as part of the Agilent Seahorse XF Hu T Cell Activation Assay Kit.
This product is designed for cell therapy research applications following the recommendations of USP<1043> on Ancillary Materials, and we can currently work with you to qualify this reagent under an approved investigational new drug (IND) or clinical trial application (CTA).
This product aims to be developed as a cGMP-grade reagent for cellular therapy research. Learn more at www.stemcell.com/t-cell-therapy
Advantages:
• Robust activation and expansion of human T cells without the use of magnetic beads, feeder cells, or antigen
• Provides a gentle activation stimulus that maintains high viability of activated and expanded T cells
• Highly stable, filter-sterilized soluble reagent
• Provides a gentle activation stimulus that maintains high viability of activated and expanded T cells
• Highly stable, filter-sterilized soluble reagent
Contains:
• Anti-human CD3 monospecific tetrameric antibody complex
• Anti-human CD28 monospecific tetrameric antibody complex
• Anti-human CD28 monospecific tetrameric antibody complex
Subtype:
Supplements
Cell Type:
T Cells; T Cells, CD4+; T Cells, CD8+
Species:
Human
Application:
Activation; Cell Culture; Expansion
Brand:
ImmunoCult
Area of Interest:
Immunology; T Cell Engineering
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Scientific Resources
Product Documentation
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Educational Materials
(17)
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Product Applications
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.
Data and Publications
Data
Figure 1. Activated Morphology of Human T Cells Stimulated With ImmunoCult™ Human CD3/CD28 T Cell Activator
Image of human T cells isolated using the EasySep™ Human T Cell Isolation Kit (Catalog #17951), stimulated with ImmunoCult™ Human CD3/CD28 T Cell Activator, and cultured in ImmunoCult™-XF T Cell Expansion Medium (Catalog # 10981).
Figure 2. Activation of EasySep™-isolated Human T Cells stimulated With ImmunoCult™ Human CD3/CD28 T Cell Activator
EasySep™-isolated human T cells were stimulated with ImmunoCult™ Human CD3/CD28 T Cell Activator and cultured in ImmunoCult™-XF T Cell Expansion Medium. Activation of viable CD3+ T cells was assessed by CD25 expression using flow cytometry. On day 0, the frequency of CD25 positive cells was (A) 5.6 ± 2.4% (mean ± SD). Following 3 days of culture, the frequency of CD25 positive cells was (B) 75.4 ± 13.8% (mean ± SD) when stimulated with ImmunoCult™ Human CD3/CD28 T Cell Activator.
Figure 3. Robust Human T Cell Expansion with ImmunoCult™ Human CD3/CD28 T Cell Activator
EasySep™-isolated human T cells were expanded over 12 days with ImmunoCult™ Human CD3/CD28 T Cell Activator in ImmunoCult™-XF T Cell Expansion Medium supplemented with Human Recombinant IL-2. On day 0, 1 x 10^6 EasySep™-isolated human T cells were stimulated with 25 μL of ImmunoCult™ Human CD3/CD28 T Cell Activator in ImmunoCult™-XF T Cell Expansion Medium supplemented with 10 ng/mL Human Recombinant IL-2. On days 3, 5, 7, and 10, viable cells were counted and fresh medium supplemented with IL-2 was added. No additional ImmunoCult™ Human CD3/CD28 T Cell Activator was added during the 12-day culture period (mean ± SD in 6 experiments with 3 donors).
Publications
(3)
Stem Cell Research 2019 oct
Detection of all adult Tau isoforms in a 3D culture model of iPSC-derived neurons
Abstract
Abstract
Tauopathies are a class of neurodegenerative diseases characterized by the presence of pathological intracellular deposits of Tau proteins. Six isoforms of Tau are expressed in the adult human brain, resulting from alternative splicing of the MAPT gene. Tau splicing is developmentally regulated such that only the smallest Tau isoform is expressed in fetal brain, contrary to the adult brain showing the expression of all 6 isoforms. Induced Pluripotent Stem Cell (iPSC) technology has opened up new perspectives in human disease modeling, including tauopathies. However, a major challenge to in vitro recapitulation of Tau pathology in iPSC-derived neurons is their relative immaturity. In this study, we examined the switch in Tau splicing from fetal-only to all adult Tau isoforms during the differentiation of iPSC-derived neurons in a new 3D culture system. First, we showed that iPSC-induced neurons inside Matrigel-coated alginate capsules were able to differentiate into cortical neurons. Then, using a new assay that allowed both the qualitative and the quantitative analysis of all adult MAPT mRNA isoforms individually, we demonstrated that BrainPhys-maintained neurons expressed the 6 adult MAPT mRNA transcripts from 25 weeks of maturation, making this model highly suitable for modeling Tau pathology and therapeutic purposes.
Nature medicine 2018 OCT
Translational control of tumor immune escape via the eIF4F-STAT1-PD-L1 axis in melanoma.
Abstract
Abstract
Preventing the immune escape of tumor cells by blocking inhibitory checkpoints, such as the interaction between programmed death ligand-1 (PD-L1) and programmed death-1 (PD-1) receptor, is a powerful anticancer approach. However, many patients do not respond to checkpoint blockade. Tumor PD-L1 expression is a potential efficacy biomarker, but the complex mechanisms underlying its regulation are not completely understood. Here, we show that the eukaryotic translation initiation complex, eIF4F, which binds the 5' cap of mRNAs, regulates the surface expression of interferon-$\gamma$-induced PD-L1 on cancer cells by regulating translation of the mRNA encoding the signal transducer and activator of transcription 1 (STAT1) transcription factor. eIF4F complex formation correlates with response to immunotherapy in human melanoma. Pharmacological inhibition of eIF4A, the RNA helicase component of eIF4F, elicits powerful antitumor immune-mediated effects via PD-L1 downregulation. Thus, eIF4A inhibitors, in development as anticancer drugs, may also act as cancer immunotherapies.
Cancer cell 2018 FEB
Eradication of Triple-Negative Breast Cancer Cells by Targeting Glycosylated PD-L1.
Abstract
Abstract
Protein glycosylation provides proteomic diversity in regulating protein localization, stability, and activity; it remains largely unknown whether the sugar moiety contributes to immunosuppression. In the study of immune receptor glycosylation, we showed that EGF induces programmed death ligand 1 (PD-L1) and receptor programmed cell death protein 1 (PD-1) interaction, requiring beta$-1,3-N-acetylglucosaminyl transferase (B3GNT3) expression in triple-negative breast cancer. Downregulation of B3GNT3 enhances cytotoxic T cell-mediated anti-tumor immunity. A monoclonal antibody targeting glycosylated PD-L1 (gPD-L1) blocks PD-L1/PD-1 interaction and promotes PD-L1 internalization and degradation. In addition to immune reactivation, drug-conjugated gPD-L1 antibody induces a potent cell-killing effect as well as a bystander-killing effect on adjacent cancer cells lacking PD-L1 expression without any detectable toxicity. Our work suggests targeting protein glycosylation as a potential strategy to enhance immune checkpoint therapy.
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