Ova ot1 The OT-I peptide is a critical tool in immunology research, specifically for studying CD8+ T cell responses. This peptide, derived from ovalbumin (OVA), is recognized by the OT-I T cell receptor (TCR), which is expressed on transgenic T cellsPeptide is more susceptible to random proteases made by splenocytes. Further, same protein can be used for OT I cultures. Wouldn't use cd3 .... The specific sequence, often referred to as SIINFEKL, is presented by the MHC class I molecule H-2Kb, making it a well-defined antigen for investigating T cell activation, trafficking, and effector functions. Researchers frequently utilize the OT-I system to probe mechanisms of immune surveillance, tumor immunology, and the development of T cell-mediated therapiesDendritic cell preactivation impairs MHC class II ....
The OT-I system relies on a transgenic mouse model expressing a TCR that is highly specific for the OVA peptide SIINFEKL (residues 257-264). This specificity allows for the precise tracking and manipulation of CD8+ T cells that recognize this particular antigen. When presented by MHC class I molecules on antigen-presenting cells, the OT-I peptide triggers a robust T cell response.Charles River provides research animal models, includingOTI mice, for use in basic research and nonclinical drug discovery and development. This response is characterized by T cell proliferation, cytokine production (such as Interferon-gamma), and cytotoxic activity, making it an invaluable model for studying adaptive immunity.
The OT-I peptide and TCR system have found widespread application across various fields of immunological research.
* T Cell Activation and Function: Researchers use the OT-I peptide to study the fundamental processes of T cell activation.Peptide is more susceptible to random proteases made by splenocytes. Further, same protein can be used for OT I cultures. Wouldn't use cd3 ... By exposing OT-I T cells to the peptide, they can investigate signaling pathways, receptor-ligand interactions, and the downstream effects of T cell stimulationAnti-OVA (SIINFEKL) T Cell Receptor (clone OT-I), Jurkat Cell Line vector. This includes examining how factors like peptide concentration, MHC presentation, and co-stimulatory signals influence T cell responsesThey are responsible for the crosstalk and chemoattraction of immune cells and tumor cells. For instance, CXCL9/10/11 chemoattract effector CD8⁺ T cells to the ....
* Immunotherapy Development: The OT-I model serves as a platform for developing and testing novel immunotherapies. For instance, strategies aimed at enhancing T cell-mediated tumor rejection often involve engineering T cells to recognize specific tumor antigens.2007年2月20日—We show that in vitro, as well as in vivo, activation of transgenicOT-I T cells was only triggered by bacteria expressing OVA variants that ... The OT-I system provides a reliable way to assess the efficacy of such engineered T cells in preclinical models, particularly those targeting OVA-expressing tumors. The understanding of T cell crosstalk and chemoattraction of immune cells, as facilitated by peptides, is crucial in this context.
* Immune Tolerance and Autoimmunity: While the OT-I TCR is highly specific, studies have also explored the concept of altered peptide ligands (APLs)Article Altered Peptide Ligands Induce Delayed CD8-T Cell .... These are modified peptides that can elicit different T cell responses, ranging from full activation to partial activation or even anergyT4/OVA is a conjugate of T4peptide(thyroxine T4) and ovalbumin. T4/OVA is a alteredpeptide, which can be used to stimulateOT-I CD8+ T cells . T4/OVA · HY- .... Investigating APLs in the context of the OT-I peptide helps researchers understand how subtle changes in antigen structure can modulate immune responses, which has implications for understanding tolerance and developing treatments for autoimmune diseases.
* Cellular Trafficking and Homing: The ability to track specific T cell populations is essential for understanding their role in immunity. The OT-I peptide allows researchers to monitor the migration and homing of CD8+ T cells to various tissues, including tumor sites or sites of infection. This is vital for evaluating the effectiveness of therapeutic interventions that aim to direct immune cells to specific locationsMHC elements for positive and negative selection - PubMed.
While the OT-I peptide (SIINFEKL) is the most commonly used, researchers may encounter variations or related peptides. The OT-I TCR specifically recognizes the H-2Kb-restricted epitope. It's important to distinguish this from other OVA-derived peptides that might be recognized by different TCRs, such as those found in OT-II transgenic mice, which are typically CD4+ T cell specific and recognize a different OVA epitope presented by MHC class II molecules.
Furthermore, the stability and presentation of the peptide can be influenced by various factors, including proteases present in the local environment. For instance, some studies note that peptides can be more susceptible to degradation by splenocytes compared to whole proteins. Researchers must consider these factors when designing experiments to ensure accurate and reproducible results.
The OT-I system, with its well-defined peptide antigen, has become an indispensable tool in immunologyT4/OVA is a conjugate of T4peptide(thyroxine T4) and ovalbumin. T4/OVA is a alteredpeptide, which can be used to stimulateOT-I CD8+ T cells . T4/OVA · HY- .... Its application continues to expand, aiding in the fundamental understanding of T cell biology and driving the development of next-generation immunotherapies.
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