Lyophilized and reconstituted red blood cell and hemosome compositions
First Claim
1. A lyophilized erythrocyte- and/or hemosome-containing composition containing about 3% by weight or less of moisture prepared by lyophilization of an aqueous suspension of erythrocytes in a phosphate-buffered saline solution at a pH in the range of 7.0 to 7.4 comprising a final concentration of about 7 to 37.5% by weight of a monosaccharide or mixture of monosaccharides capable of permeating the membranes of erythrocytes, and a final concentration of about 0.7 by weight percent up to the saturation point of the solution of a polymer or mixture of polymers having a molecular weight in the range of about 2.5K to 360K.
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Accused Products
Abstract
A process and medium are disclosed for the lyophilization of red blood cells which comprises the use of solutions including monosaccharide hexoses and pentoses, and biocompatible polymers to permit the reconstitution of viable red blood cells.
69 Citations
23 Claims
- 1. A lyophilized erythrocyte- and/or hemosome-containing composition containing about 3% by weight or less of moisture prepared by lyophilization of an aqueous suspension of erythrocytes in a phosphate-buffered saline solution at a pH in the range of 7.0 to 7.4 comprising a final concentration of about 7 to 37.5% by weight of a monosaccharide or mixture of monosaccharides capable of permeating the membranes of erythrocytes, and a final concentration of about 0.7 by weight percent up to the saturation point of the solution of a polymer or mixture of polymers having a molecular weight in the range of about 2.5K to 360K.
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17. A process for reconstituting a lyophilized composition comprising erythrocytes and/or hemosomes comprising the step of contacting said erythrocytes and/or hemosomes at a temperature greater than about 17°
- C. with an aqueous solution of a polymer or mixture of polymers having a molecular weight of from about 2.5K to about 360K which is present in a final concentration in the range of 12 to 30% by weight.
- View Dependent Claims (19, 20, 21)
Specification