Glycosaminoglycan-antithrombin III/heparin cofactor II conjugates
First Claim
1. A covalent conjugate composition comprising glycosaminoglycans linked by covalent linkages to a species comprising at least one primary amino group, wherein said species is directly covalently linked via said amino group to a terminal aldose residue of said glycosaminoglycans, said covalent linkages comprising an α
- -carbonyl amine formed by a substantial amount of subsequent Amadori rearrangement of imines resulting from reaction between said amino group and said terminal aldose residue of said glycosaminoglycans, or a pharmaceutically acceptable salt thereof,wherein said glycosaminoglycans are heparin (H) and said amino-containing species is antithrombin III (AT).
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Abstract
Novel conjugates of glycosaminoglycans, particularly heparin and dermatan sulfate, and amine containing species and therapeutic uses thereof are described. In particular, mild methods of conjugating heparins to proteins, such as antithrombin III and heparin cofactor II, which provide covalent conjugates which retain maximal biological activity are described. Uses of these conjugates to prevent thrombogenesis, in particular in lung airways, such as found in infant and adult respiratory distress syndrome are also described.
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Citations
49 Claims
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1. A covalent conjugate composition comprising glycosaminoglycans linked by covalent linkages to a species comprising at least one primary amino group, wherein said species is directly covalently linked via said amino group to a terminal aldose residue of said glycosaminoglycans, said covalent linkages comprising an α
- -carbonyl amine formed by a substantial amount of subsequent Amadori rearrangement of imines resulting from reaction between said amino group and said terminal aldose residue of said glycosaminoglycans, or a pharmaceutically acceptable salt thereof,
wherein said glycosaminoglycans are heparin (H) and said amino-containing species is antithrombin III (AT). - View Dependent Claims (4, 5, 6, 11, 15, 20, 29)
- -carbonyl amine formed by a substantial amount of subsequent Amadori rearrangement of imines resulting from reaction between said amino group and said terminal aldose residue of said glycosaminoglycans, or a pharmaceutically acceptable salt thereof,
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2. A covalent conjugate composition comprising glycosaminoglycans and molecules comprising at least one amino group, wherein said amino group is directly linked to said glycosaminoglycans by covalent linkages, wherein said conjugate composition is made by the process comprising:
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(a) incubating said glycosaminoglycans with said molecules at a pH and for a time sufficient for imine formation between said amino group and a terminal aldose residue of said glycosaminoglycans, and at a time and temperature sufficient for said imines to undergo a substantial amount of subsequent Amadori rearrangement to an α
-carbonyl amine forming said covalent linkages;
(b) isolating said conjugate composition, or a pharmaceutically acceptable salt thereof, wherein said glycosaminoglycans are heparin (H) and said amino-containing molecules are antithrombin III (AT). - View Dependent Claims (13, 16, 21, 25, 30, 34, 35, 36)
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3. A process for preparing a conjugate composition of molecules comprising at least one primary amino group linked to glycosaminoglycans by covalent bonds, said process comprising:
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(a) incubating said glycosaminoglycans with said molecules at a pH and for a time sufficient for formation of an imine between said amino group and a terminal aldose residue of said glycosaminoglycans, and at a time and temperature sufficient for said imines to undergo a substantial amount of subsequent Amadori rearrangement to an α
-carbonyl amine forming said covalent bonds; and
(b) isolating said conjugate composition, wherein said glycosaminoglycans are heparin (H) and said amino-containing molecules are antithrombin III (AT). - View Dependent Claims (17, 37, 38)
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7. A conjugate composition comprising a substantial amount of glycosaminoglycans covalently bonded to an amino-containing species by —
- CO—
CH2—
NH—
, said CO—
CH2—
portion being derived from said glycosaminoglycan and said NH portion being derived from in amino group of said species,wherein said glycosaminoglycans are heparin (H) and said amino-containing species is antithrombin III (AT). - View Dependent Claims (12, 18, 22, 24, 26, 28, 31, 33, 40, 41, 42, 43, 44, 45, 46, 47, 48)
- CO—
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8. A conjugate composition comprising a substantial amount of a complex of the formula:
- glycosaminoglycan CO—
CH2—
NH—
protein,wherein raid glycosaminoglycan is heparin (H) and said protein is antithrombin III (AT). - View Dependent Claims (9, 10, 14, 19, 23, 27, 32)
- glycosaminoglycan CO—
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39. A process of claim wherein said incubating is carried out for about two weeks.
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49. A covalent conjugate composition comprising glycosaminoglycans linked by covalent linkages to species comprising at least one primary amino group, wherein said species is directly covalently linked via said amino group to a terminal aldose residue of said glycosaminoglycans, said covalent linkages comprising an α
- -carbonyl amine formed by a substantial amount of subsequent Amadori rearrangement of imines resulting from reaction between said amino group and said terminal aldose residue of said glycosaminoglycans, or a pharmaceutically acceptable salt thereof,
wherein said glycosaminoglycans are heparin (H) and said amino-containing species is antithrombin III (AT), or said glycosaminoglycans are heparin and said amino-containing species is heparin cofactor II, or said glycosaminoglycans are dermatan sulfate and said amino-containing species is heparin cofactor II.
- -carbonyl amine formed by a substantial amount of subsequent Amadori rearrangement of imines resulting from reaction between said amino group and said terminal aldose residue of said glycosaminoglycans, or a pharmaceutically acceptable salt thereof,
Specification