Erythrocytic cells and method for preserving cells
US6770478B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 16, 2002 |
| Grant date | Aug 3, 2004 |
| Priority date | — |
| Expiry date | Jan 16, 2022 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC12N5/0641
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A dehydrated composition is provided that includes freeze-dried erythrocytic cells. Alcohol (e.g., sterol or cholesterol) is at least partially removed from erythrocytic cells including erythrocytic membranes. After removal of at least part of the alcohol, the erythrocytic cells have a low phase transition temperature range, an intermediate phase transition temperature range, and a high phase transition temperature range. The erythrocytic cells may be loaded with an oligosaccharide (e.g., trehalose) which preserves biological properties during freeze-drying and rehydration. A process for increasing cooperativity of a phase transition of an erythrocytic cell. A process for preserving and/or increasing the survival of dehydrated erythrocytic cells, including storing dehydrated erythrocytic cells having a residual water content equal to or less than about 0.30 gram of water per gram of dry weight erythrocytic cells.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.