HSV proteins for inhibiting recognition by cytotoxic T lymphocyt

Drug – bio-affecting and body treating compositions – Antigen – epitope – or other immunospecific immunoeffector – Virus or component thereof

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514 44, 4351723, 4353201, 4352402, 530350, 536 235, 536 2372, A61K 39245, A01N 4308, C12N 1538, C07K 14005

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active

058583769

ABSTRACT:
This invention relates to the use of Herpes Simplex Virus (HSV) immediate early proteins ICP47 or IE12, nucleic acid sequences coding for ICP47 and IE12, and homologous proteins and nucleic acid sequences, to inhibit presentation of viral and cellular antigens associated with major histocompatibility class I (MHC class I) proteins to CD8+T lymphocytes. This inhibition effectively increases infective persistence, which can improve the utility of viral gene therapy vectors. This invention also relates to a method of inhibiting recognition of a cell by cytotoxic T lymphocytes, comprising introducing into the cell an isolated protein of ICP47 of HSV type 1 or IE12 of HSV type 2. In addition, this invention pertains to vector elements, vectors, polypeptides and polypeptide fragments that can be utilized for these purposes.

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