Use of multivalent chimeric peptide-loaded, MHC/Ig molecules to detect, activate or suppress antigen-specific T cell-dependent immune responses

   
   

To increase the effective affinity of soluble analogs of peptide/MHC molecules for their cognate ligands, divalent peptide/MHC complexes were constructed. Using a recombinant DNA strategy, DNA encoding the MHC class I was ligated to DNA coding for murine Ig heavy chain. MHC/Ig complexes were exploited to homogeneously load with peptides of interest. The results of flow cytometry demonstrated that the .sup.pep MHC/Ig complexes bound specifically with high affinity to cells bearing their cognate receptors. .sup.pep MHC/Ig complexes are also useful in modulating effector functions of antigen-specific T cells. These .sup.pep MHC/Ig complexes are useful for studying TCR/MHC interactions and lymphocyte tracking and have uses as specific regulators of immune responses.

Para aumentar a afinidade eficaz de analogs soluble de moléculas de peptide/MHC para seus ligands cognate, os complexos divalent de peptide/MHC foram construídos. Usando uma estratégia recombinant do DNA, DNA que codifica a classe de MHC eu ligated ao coding do DNA para a corrente pesada murine de Ig. Os complexos de MHC/Ig foram explorados para carregar homogênea com os peptides do interesse. Os resultados de cytometry do fluxo demonstrado que os complexos do sup.pep MHC/Ig limitam especificamente com afinidade elevada às pilhas que carregam seus receptors cognate. os complexos do sup.pep MHC/Ig são também úteis em modular funções effector de pilhas de T antígeno-específicas. Estes complexos do sup.pep MHC/Ig são úteis para estudar as interações e o lymphocyte de TCR/MHC que seguem e têm usos como reguladores específicos de respostas imunes.

 
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