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CAR1(CD19 scFv-41BB), CAR2(Igκ scFv-CD3ζ), a Combinatorial CAR (CAR-NR-ZP2481)


All products and services are For Research Use Only and CANNOT be used in the treatment or diagnosis of disease.

The risk of on-target/off-tumor toxicity is a major obstacle for the development of effective CAR T cell therapies. Strategies to minimize the "on-target/off-tumor" toxicity by improving the specific tumor recognition have to be developed, especially for targeting TAAs that are self-antigens and differentially expressed by tumor cells.

The combinatorial CAR is desighed by recognizing two different antigens on the tumor cells via engineering T cells with two CAR molecules: one CAR provides only the activation signal (the same as the first-generation CAR) and the other CAR provides co-stimulation (similar to the second-generation CAR but only has a co-stimulatory moiety, not an activation moiety). Therefore, optimal and effective T cell activation can only be achieved by the recognition of two different antigens simultaneously on the tumor cells, while sparing normal tissue that may only express one of these two antigens.

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CAR Schemeitc

CAR Adaptor

  • Common Name
  • CD19
  • Target 1
  • CD19
  • CAR1 Construction
  • CD19 scFv-41BB
  • Signaling Cassetes 1
  • 41BB
    CD137 (also known as 4-1BB) is a surface co-stimulatory glycoprotein originally described as present on activated T lymphocytes, which belongs to the tumor necrosis factor (TNF) receptor superfamily. It is expressed mainly on activated CD4+ and CD8+ T cells, and binds to a high-affinity ligand (4-1BBL) expressed on several antigen-presenting cells such as macrophages and activated B cells. On the basis of preclinical observation, this molecule can promote the persistence of antigen-specific and antigennonspecific chimeric antigen receptor T-cells to significantly increases antitumor activity.
  • Target 2
  • Igκ
  • CAR2 Construction
  • Igκ scFv-CD3ζ
  • Signaling Cassetes 2
  • CD3ζ
    CD3ζ, also known as T-cell receptor zeta, which together with T-cell receptor and CD3γ, δ , ε chain, forms the TCR-CD3 complex. ζ was expressed independently from the complex. The zeta chain plays an important role in coupling antigen recognition to several intracellular signal-transduction pathways. CD3-zeta, which contains 3 ITAMs, is the most commonly used endodomain component of CARs. It transmits an activation signal to the T cell after antigen is bound. CD3-zeta may not provide a fully competent activation signal and additional co-stimulatory signaling is needed. For example, chimeric 4-1BB and OX40 can be used with CD3-zeta to transmit a proliferative/survival signal, or all three can be used together.

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For research use only. Not intended for any clinical use. No products from Creative Biolabs may be resold, modified for resale or used to manufacture commercial products without prior written approval from Creative Biolabs.

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