Antigenic modulation of cells
US8007784B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 1, 1999 |
| Grant date | Aug 30, 2011 |
| Priority date | — |
| Expiry date | Jun 1, 2019 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K2239/31
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
The present invention is directed to a non-immunogenic cellular composition comprising: a cell having a cell surface and antigenic determinants on the cell surface; an optional linker molecule covalently attached to the cell surface; and a hydrophilic, biocompatible, non-immunogenicity providing compound or polymer (e.g., polyethylene glycol or a derivative thereof) covalently attached to the linker molecule or directly to the cell. In one embodiment, the linker molecule is covalently attached directly to the antigenic determinant on the cell surface. In an alternate embodiment, the linker molecule may be covalently attached to a non-antigenic site on the cell surface, but will camouflage the antigenic determinant on the cell surface. Various uses of the resulting non-immunogenic cell are also provided, including a method of decreasing phagocytosis of a cell, a method of decreasing an adverse reaction to a transfusion, a method of decreasing rejection of a transplanted cell, tissue or organ, and a method of decreasing antibody-induced aggregation of cells.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.