Introduction To CD33L3/Siglec-15
Drug targets a biomolecule that can directly bind to drugs and then react. Generally, the target refers to a protein, which is related to the cause of disease. The focus of the target began with focusing on tumors and then began to spread to various fields. Introduction to CD33L3/Siglec-15 protein is a common target in medicine.
CD33L3, Also known as Siglec-15 or Sialic Acid-Binding Ig-Like Lectin 15, is a type I transmembrane protein belonging to the Siglec (sialic acid-binding immunoglobulin lectin) family. It is widely expressed in tumor-associated macrophages (TAM) and a variety of tumor cells. Its expression profile is mutually exclusive with PD-L1, and it is considered to be another important pathway involved in tumor immune escape.
Function of Target CD33L3/Siglec-15
Siglec-15 has also been identified as a key regulator of osteoclast differentiation and may have a potential impact on skeletal diseases not limited to osteoporosis. CD33L3 Is expressed on a variety of immune cells, including dendritic cells (DCs), macrophages, and certain T cell subsets, suggesting that it may be involved in the activation, differentiation, or functional regulation of these cells. By recognizing and binding to sialylated glycogroups on the cell surface, CD33L3 may participate in cell-to-cell recognition and adhesion, thus affecting immune cell migration, homing, and formation of immune synapses. The CD33L3 may also interact with the intracellular signaling molecules through its cytoplasmic tail region to regulate the activation status of the immune cells and the strength of the immune response. The inhibitory function of Siglecs can be exploited by cancer 31 cells, which display increased sialylation to suppress and evade immune surveillance.
Gene Pathway of Target CD33L3/Siglec-15
Upon binding of the Ig-like domain of CD33L3 to the sialylated sugar moiety on the cell surface, it may trigger a conformational change that causes the cytoplasmic tail region to interact with downstream signaling molecules. The cytoplasmic tail region may act as a signaling platform to recruit and activate specific kinases, phosphatases, or other signaling molecules to initiate a series of intracellular signal transduction events. These signal transduction events ultimately affect biological processes such as immune cell activation, proliferation, differentiation, and migration, as well as cytokine production, which in turn modulate the strength and direction of the immune response.

Fig 1: Siglec-15 Gene Pathway. (Reference source: Sun J, Lu Q, Sanmamed MF, Wang J. Siglec-15 as an Emerging Target for Next-generation Cancer Immunotherapy. Clin Cancer Res. 2021 Feb 1;27(3):680-688.)
Alpha Lifetech Can Provide
At present, various drugs targeting CD33L3/Siglec-15 are constantly under development, and taking drugs alone or together with other products to treat diseases has become a new method and remarkable achievements have been made. CD33L3/Siglec-15 protein has shown important research value and application prospects in tumor biology, and drug research and development. With further research and technological advances, CD33L3/Siglec-15 protein products are also essential. Alpha Lifetech can provide CD33L3/Siglec-15 corresponding products and help each customer's research and development. Alpha Lifetech provides end-to-end biotechnology development solutions, from upstream cell culture optimization to downstream purification scale. Our process is validated through analytical techniques such as HPLC, SDS-PAGE, and mass spectrometry to ensure product consistency and regulatory compliance. By combining cutting-edge biotechnology expertise with flexible service models, we help clients accelerate project research progress and ensure smooth experimentation.
| Catalog Number | Product Name | Product Sizes |
|---|---|---|
| ALP64631 | 50ug,100ug,500ug | |
| ALP64535 | 50ug,100ug,500ug | |
| ALP64534 | 50ug,100ug,500ug | |
| ALP64533 | 50ug,100ug,500ug | |
| ALP64532 | 50ug,100ug,500ug | |
| ALP64531 | 50ug,100ug,500ug | |
Reference
[1] Sun J, Lu Q, Sanmamed MF, Wang J. Siglec-15 as an Emerging Target for Next-generation Cancer Immunotherapy. Clin Cancer Res. 2021 Feb 1;27(3):680-688.
[2] Huang R, Zheng J, Shao Y, Zhu L, Yang T. Siglec-15 as a multifunctional molecule involved in osteoclast differentiation, cancer immunity, and microbial infection. Prog Biophys Mol Biol. 2023 Jan;177:34-41.
[3] Moreira RS, da Silva MM, de Melo Vasconcelos CF, da Silva TD, Cordeiro GG, Mattos-Jr LAR, da Rocha Pitta MG, de Melo Rêgo MJB, Pereira MC. Siglec 15 as a biomarker or a druggable molecule for non-small cell lung cancer. J Cancer Res Clin Oncol. 2023 Dec;149(19):17651-17661.
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