Technical Articles

PD-1 inhibitors and PD-L1 inhibitors, as immune checkpoint inhibitors targeting the same pathway, enhance T cell recognition and killing of tumor cells by blocking the binding of PD-1 to PD-L1, thereby exerting anti-tumor effects.

IL-21 protein belongs to the IL-2 cytokine superfamily and is primarily produced by CD4-positive T cells. It can also be partially secreted by natural killer T cells, follicular helper T cells, and CD8-positive T cells, with some lymphoid hematopoietic cells capable of producing it in small amounts.

IL-5 protein is a pleiotropic cytokine, also known as T-cell replacing factor, eosinophil colony-stimulating factor 1, and eosinophil differentiation factor. This protein is primarily produced by T cells and plays a significant role in immune regulation.

CD4+辅助性T细胞是适应性免疫应答的核心调节细胞，根据分化方向不同可分为多个功能亚群。其中Th17细胞因其在自身免疫性疾病和宿主防御中的独特作用，成为免疫学研究的热点。

The full name of TNF-α is tumor necrosis factor-α, primarily produced by activated immune cells such as macrophages and T cells. As a pleiotropic cytokine, it plays a dual role in the human body: both as a defender against infections and as a promoter of tissue damage.

As the core component of adaptive immunity, the transition of T cells from a quiescent state to a functionally activated state requires precise regulation by specific signals. This activation process constitutes a fundamental aspect of cellular immunology research and the development of immunotherapies.

In immunological research, how to accurately identify and analyze antigen-specific T cells has always been a core issue. Cytotoxic T cells (CTLs) play a key role in antiviral and anti-tumor immunity by recognizing peptide segments (pMHC) that bind to MHC class I molecules through their T cell receptors (TCR).

MHC antigen peptide oligomerization technology is a breakthrough tool in modern immunology research. How can it help researchers accurately identify and track antigen-specific T cells? The core of this technology is to utilize the complex formed by the binding of major histocompatibility complex (MHC) molecules with specific antigen peptides, and then enhance the detection sensitivity through polymerization.

Cytotoxic T lymphocytes (CTLs), serving as core effector cells in immune responses, execute critical immune surveillance functions through the specific recognition of antigens via their T cell receptors (TCRs). During antigen recognition, the CD8 co-receptor of CTLs collaborates with TCRs to precisely identify antigenic peptides presented by MHC class I molecules.

mRNA vaccination has multiple immunological advantages. It can activate CD8 + T cells and CD4 + T cells and induce antibody production, forming an adaptive immune response network. It doesn't rely on viral - vector delivery systems, avoiding the potential limits of pre - existing vector immunity on booster vaccination. Also, the modular design of its industrial production process enables rapid large - scale preparation.