MAGE-3 (143-151)

MAGE-3 (143-151) is a synthetic peptide corresponding to amino acids 143 to 151 of the Melanoma Antigen Gene-3 (MAGE-3) protein, a member of the cancer-testis antigen family. As a well-characterized peptide fragment, it is frequently utilized in immunological and cancer research due to its defined sequence and relevance to tumor-associated antigenicity. The MAGE-3 protein is predominantly expressed in various malignancies and has minimal expression in normal tissues outside of immune-privileged sites, making this peptide fragment a valuable tool for studying antigen presentation, immune recognition, and T cell epitope mapping. Its biochemical properties facilitate precise investigations into peptide-MHC interactions and cellular immune responses.

Epitope mapping: Researchers employ the MAGE-3 (143-151) peptide to delineate cytotoxic T lymphocyte (CTL) epitopes within the MAGE-3 protein. By exposing antigen-presenting cells to this defined sequence, investigators can identify and characterize specific T cell responses, enabling detailed mapping of immunodominant regions. This approach is fundamental for understanding the molecular basis of tumor antigen recognition and for the rational design of immunological assays.

Antigen presentation studies: The peptide serves as a model substrate to investigate the mechanisms of peptide loading onto major histocompatibility complex (MHC) class I molecules. By utilizing this fragment in cell-based systems or in vitro binding assays, scientists can analyze the efficiency and specificity of antigen processing and presentation pathways. Such studies are instrumental in elucidating how tumor-associated peptides are displayed to the immune system, providing insights into immune surveillance and evasion.

T cell activation assays: MAGE-3 (143-151) is widely used to stimulate antigen-specific T cells in vitro, allowing for the quantitative and qualitative assessment of cellular immune responses. The peptide enables the expansion and functional characterization of T cells recognizing this epitope, supporting the development of immunomonitoring protocols. These assays are critical for evaluating immune competence in experimental systems and for validating the immunogenicity of candidate antigens.

Peptide-MHC binding analysis: The defined sequence of this peptide makes it an ideal candidate for studying peptide binding affinity and stability with various MHC class I alleles. Such binding studies provide essential data for understanding the structural and functional determinants of antigen presentation. Insights gained from these analyses inform the design of predictive algorithms for peptide-MHC binding and support the selection of optimal epitopes for downstream applications.

Vaccine research tool: In the context of preclinical immunology research, the MAGE-3 (143-151) fragment is utilized as a reference peptide in the evaluation of antigen-specific immune responses. By incorporating this peptide into experimental vaccine formulations or immunization protocols, researchers can assess the induction and specificity of T cell responses. Its use in these studies supports the broader objective of identifying and validating promising immunogenic sequences for translational research in cancer immunology.

1. A possible role of tachykinin-related peptide on an immune system activity of mealworm beetle, Tenebrio molitor L

2. Immune responses to peptides containing homocitrulline or citrulline in the DR4-transgenic mouse model of rheumatoid arthritis

3. An Isolated TCR αβ Restricted by HLA-A* 02: 01/CT37 Peptide Redirecting CD8+ T Cells to Kill and Secrete IFN-γ in Response to Lung Adenocarcinoma Cell Lines

4. An Open-label, Single-center, Safety and Efficacy Study of Eyelash Polygrowth Factor Serum

5. Identification, Localization in the Central Nervous System and Novel Myostimulatory Effect of Allatostatins in Tenebrio molitor Beetle