Peptide Loaded Mhc
Peptide Loaded Mhc - Related Videos
07:59
A High Throughput MHC II Binding Assay for Quantitative Analysis of Peptide Epitopes
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Cited by 21 •
2014
Biochemical assays with recombinant human MHC II molecules can provide rapid, quantitative insights into immunogenic epitope identification, deletion, or design. Here, a peptide-MHC II binding assay scaled to 384-well plates is described. This cost effective format should prove useful in the fields of protein deimmunization and vaccine design and development.
04:54
Evaluation of Controlled T Cell Activation with a Photoactivatable Peptide MHC
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2025
This video demonstrates a method of decaging a photoactivatable peptide-major histocompatibility complex using UV irradiation. The decaging process exposes the native peptide sequence, enabling precise T cell activation.
04:25
A Peptide-MHC-I Tetramer Staining Technique to Analyze SIV-Specific CD8+ Memory T Cells
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2025
This video demonstrates a method for characterizing CD8+ memory T cells specific to simian immunodeficiency virus (SIV) using peptide-major histocompatibility complex class I (pMHC-I) tetramers. A pMHC-I tetramer is a complex of four MHC-I molecules bound to SIV-specific peptides and conjugated to a fluorophore. These tetramers selectively bind to T cell receptors (TCRs) on SIV-specific CD8+ T cells, facilitating the characterization of these cells.
01:29
Assessing Impaired MHC-I Antigen Presentation in Immune Cells Infected with Bacteria
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2026
Start with an immune cell culture infected with pathogenic bacteria that form intracellular inclusion bodies.The bacterial infection impairs the antigen presentation pathway in the immune cells.Take an uninfected culture as a control.Next, add a model protein antigen and incubate.Immune cells internalize, process, and present the model antigen-derived peptides on MHC-I molecules.After incubation, wash the cells to remove any unprocessed antigen.Fix the cells, then add a quenching agent to...
09:32
Immunopeptidomics: Isolation of Mouse and Human MHC Class I- and II-Associated Peptides for Mass Spectrometry Analysis
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Cited by 22 •
2021
Here, we present a protocol for the purification of MHC class I and class II peptide complexes from mouse and human cell lines providing high-quality immunopeptidomics data. The protocol focuses on sample preparation using commercially available antibodies.
FAQs
Antigen-processing pathways first generate short peptide fragments, which then bind within an MHC groove. This binding produces a stable peptide-MHC complex that can be transported to the cell surface. The sequence links intracellular or extracellular antigen handling to a display system that makes selected fragments available for examination by T-cell receptors.
MHC class I and class II direct peptide information to different T-cell populations. Class I primarily presents peptides originating inside cells to CD8+ T cells, while class II primarily presents peptides derived from extracellular materials to CD4+ T cells. This division connects the source of an antigen with the type of cellular immune response that can examine it.
The peptide-MHC complex provides the molecular display that T-cell receptors inspect at the cell surface. Because the displayed peptide reflects antigen-processing activity, this interaction helps T cells assess cellular or extracellular material for potentially relevant antigenic information. Studying these complexes therefore clarifies how immune surveillance operates in infection, autoimmunity, and cancer.
Peptide-loaded MHC molecules can support antigen-specific assays by presenting a selected peptide to T cells in a defined complex. These assays help investigate whether T cells recognize particular antigen fragments rather than an undifferentiated antigen mixture. The approach is useful for examining immune responses associated with infection, autoimmunity, cancer, and vaccine-related studies.
Vaccine design can use information about peptide presentation to focus attention on antigen fragments that may be displayed by MHC molecules and examined by T cells. Studying which peptide-MHC combinations are relevant supports the development of antigen-specific strategies. This connects molecular antigen presentation with efforts to shape targeted immune responses.
In immunotherapy research, peptide-loaded MHC molecules provide a way to study the antigen fragments available for T-cell examination. Comparing relevant peptide displays can help investigators analyze immune recognition in cancer and other disease settings, including infection and autoimmunity. These studies place antigen presentation at the center of approaches designed around antigen-specific immune responses.