CD80, also known as B7-1, is mainly expressed on antigen presenting cells (APCs), such as dendritic cells, activated B cells, and macrophages. It works closely with another B7 family member, CD86 (B7-2). CD80 contains 288 amino acids and has a molecular weight of 33 kDa. Structurally, it contains two extracellular immunoglobulin-like domains, a transmembrane segment, and a short cytoplasmic tail. CD80 exists in monomeric and dimer forms, but it mainly forms dimers. CD80 binds to CD28 and promotes T-cell activation and proliferation by providing essential co-stimulatory signals. In contrast, binding to CTLA-4 transmits inhibitory signals to attenuate T-cell activity, thus playing a key checkpoint role in immune regulation.
CD86, also known as B7-2, is another co-stimulatory molecule expressed on various APCs, including dendritic cells, Langerhans cells, macrophages, and B cells. It shares similarities with CD80, including its structure and function in the immune system. CD86 is 329 amino acids long and is a 70 kDa glycoprotein. Structurally, CD86 contains an Ig-like extracellular domain, a transmembrane region, and a longer cytoplasmic domain compared to CD80. CD86 is essential for the initial activation of T cells and is more abundantly expressed and more rapidly induced after activation than CD80. Like CD80, CD86 interacts with CD28 to provide the necessary co-stimulatory signals for naive T cell activation and interacts with CTLA-4 to transmit inhibitory signals, thereby regulating immune responses.
Human CD80/CD86 Double Knockout Cell Line - HEK293T has been precisely genetically engineered to eliminate the expression of CD80 (B7-1) and CD86 (B7-2). These proteins play a crucial role in immune responses, acting as ligands for CD28 and CTLA-4 on T cells, thereby regulating T cell activation and tolerance. The following are the main applications of this double knockout cell line:
Immunology Research: The lack of CD80/CD86 expression allows researchers to dissect the specific contributions of these molecules in immune synapse formation and T cell receptor signaling pathways.
Cancer Research: In oncology, CD80/CD86 double knockout cells can help study the mechanisms of tumor immune evasion. By studying the interaction between T cells and these modified HEK293T cells, researchers can develop targeted therapies designed to enhance anti-tumor immunity.
Drug Discovery and Development: This cell line provides a valuable platform for screening potential immunotherapeutic agents. Compounds that modulate pathways involving CD80 and CD86 can be tested for efficacy and safety, aiding the development of new drugs for autoimmune diseases and cancer.
Vaccine Development: Understanding how antigen presenting cells interact with T cells is critical for vaccine efficacy. This double knockout cell line can be used to study the adjuvant properties and effectiveness of various vaccine components in the absence of these co-stimulatory signals.
Cell Therapy Research: The CD80/CD86 double knockout cell line can be used to develop and optimize cell-based therapies, including adoptive T cell transfer and CAR-T cell therapy. By providing a controlled environment, manipulation and understanding of T cell activation can be improved for therapeutic purposes.
Customer Q&As
What is the recommended growth medium? Does it require antibiotic selection?
A: DMEM supplemented with 10% fetal bovine serum.
It is not required to add the selection antibiotics when culturing the KO cells.
How is the knockout cell line validated?
A: The knockout cell product is validated by PCR amplification and Sanger Sequencing to confirm the mutation at the genomic level. Please find the detailed mutation info in the datasheet.
Is the product a single clonal cell or mixed cell pool?
A: Single clonal cell.
Can I confirm gene knockout by RT-qPCR?
A: No. This knockout cell product is generated using the CRISPR/Cas9 system to induce small insertions or deletions (indels) resulting in frameshift mutations. Although these frameshift mutations typically disrupt the coding gene, there is a possibility that the non-functional transcript may still be transcribed. Consequently, this could potentially yield misleading results when analyzed by RT-qPCR.
How can I store the cell product?
A: The cell line should be stored in liquid nitrogen for long-term preservation.
Is it possible to get multiple knockout clones for my GOI?
A: For most cases, we often keep at least 2 clones with different frameshift mutations. Please feel free to contact us to check if there are additional available clones.
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Customer Reviews
Cost-Effective
This ready-to-use CD80/CD86 knockout cell line is extremely cost-effective. It has significantly reduced our experimental setup time, contributing to more efficient workflows and timely project completion.
Great product
The Human CD80/CD86 Double Knockout Cell Line-HEK293T has drastically improved our immune signaling experiments. The absence of CD80 and CD86 allows us to precisely dissect the roles of these molecules in T cell activation without the background noise.
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