Macromolecular conjugates of hemoglobin, a procedure for their preparation and their uses
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United States of America Patent
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May 5, 1992
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app pub date -
Apr 20, 1989
filing date -
Apr 20, 1988
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Expired
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Abstract
The subject of the invention is a procedure for the preparation of water-soluble macromolecular conjugates of hemoglobin, characterized in that: in the first step, Z sites are bound to a polymer P, the Z sites containing, on the one hand, at least one negative charge borne for example by sulfate groups and intended to lead to the formation of an ionic linkage with hemoglobin, and containing, on the other hand, at least one carboxylic group for example intended to lead to the formation of a covalent linkage with hemoglobin, then in the second step, the polymer P containing the Z site(s) is made to react with hemoglobin in the oxygenated form in order to form, on the one hand, at least one ionic linkage between at least one of the Z sites borne by the polymer and hemoglobin and, on the other hand, at least one covalent linkage between the same Z site mentioned above borne by the polymer and hemoglobin. The macromolecular conjugates obtained by this procedure exhibit a lower affinity for oxygen than that of free hemoglobin.
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