Method for in vivo delivery of active compounds using reagent conjugate
First Claim
1. A method for visualizing specific target analytes in a subject which comprises:
- (1) providing a reagent conjugate useful for delivering active compounds to specific target analytes into a subject, said conjugate comprising(a) a first reagent comprising a specific target recognition component which comprises a Fab′
antibody fragment which is covalently attached to a first sequence-specific component comprising a first oligonucleotide comprised of 2′
-chlorodeoxy-guanosine which is about 20 bases long; and
(b) a second reagent comprising an active compound component linked to a second sequence-specific component which specifically recognizes and binds to said first sequence-specific component, said second reagent-comprised of 90y bound to a 1,2-diaminocyclohexane-tetraacetate (DCTA) chelating moiety, said second sequence-specific component comprising a second oligonucleotide, said DCTA chelating moiety being covalently attached through the allylamino group at the 5-position of a cytidyl residue in said second oligonucleotide which comprises the sequence [(2′
-chloro-deoxycytosine)3(2′
-chloro-deoxycytosine-5-allylamine)]5, andwherein said first and second sequence-specific components (a) and (b) have been rendered nuclease resistant by the presence of one or more nucleotide analogs to said oligonucleotides;
(2) introducing into said subject an effective amount of said reagent conjugate; and
(3) visualizing said specific target analytes.
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Abstract
This invention relates to novel reagent conjugates and a novel multi-step process for delivering active compounds to target analytes of interest in a patient for diagnostic and therapeutic purposes. According to the process, two novel reagents are bound to each other by linkage of the sequence-specific components they contain. The first reagent, which is comprised of a target recognition component and a first sequence-specific component, is introduced into the patient and allowed to achieve maximal localization on the target cells. The second reagent, which is comprised of an active compound component and a second sequence-specific component is then introduced into the patient, thereby forming a complex with the first reagent via the recognition and binding of the sequence-specific components of the two reagents to form the reagent conjugate of the invention. The active compound component is thereby efficiently and specifically delivered to the target analyte.
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Citations
14 Claims
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1. A method for visualizing specific target analytes in a subject which comprises:
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(1) providing a reagent conjugate useful for delivering active compounds to specific target analytes into a subject, said conjugate comprising (a) a first reagent comprising a specific target recognition component which comprises a Fab′
antibody fragment which is covalently attached to a first sequence-specific component comprising a first oligonucleotide comprised of 2′
-chlorodeoxy-guanosine which is about 20 bases long; and(b) a second reagent comprising an active compound component linked to a second sequence-specific component which specifically recognizes and binds to said first sequence-specific component, said second reagent-comprised of 90y bound to a 1,2-diaminocyclohexane-tetraacetate (DCTA) chelating moiety, said second sequence-specific component comprising a second oligonucleotide, said DCTA chelating moiety being covalently attached through the allylamino group at the 5-position of a cytidyl residue in said second oligonucleotide which comprises the sequence [(2′
-chloro-deoxycytosine)3(2′
-chloro-deoxycytosine-5-allylamine)]5, andwherein said first and second sequence-specific components (a) and (b) have been rendered nuclease resistant by the presence of one or more nucleotide analogs to said oligonucleotides; (2) introducing into said subject an effective amount of said reagent conjugate; and (3) visualizing said specific target analytes. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for delivering active compound components to specific target analytes in a subject which comprises:
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(1) providing; (a) a first reagent comprising a specific target recognition component which comprises a Fab′
antibody fragment which is covalently attached to a first sequence-specific component comprising a first oligonucleotide comprised of 2′
-chlorodeoxy-guanosine which is about 20 bases long; and(b) a second reagent comprising an active compound component linked to a second sequence-specific component which specifically recognizes and binds to said first sequence-specific component, said second reagent comprised of 90y bound to a 1,2-diaminocyclohexane-tetraacetate (DCTA) chelating moiety, said second sequence-specific component comprising a second oligonucleotide, said DCTA chelating moiety being covalently attached through the allylamino group at the 5-position of a cytidyl residue in said second oligonucleotide which comprises the sequence [(2′
-chloro-deoxycytosine)3 (2′
-chloro-deoxycytosine-5-allylamine)]5;wherein said first and second sequence-specific components (a) and (b) have been rendered nuclease resistant by the presence of one or more nucleotide analogs to said oligonucleotides; (2) introducing into said subject an effective amount of said first reagent; (3) allowing said first reagent to equilibrate to achieve sufficiently maximal localization on said specific targets analytes; (4) introducing into said subject an effective amount of said second reagent; and (5) allowing said second reagent to bind to said first reagent, thereby delivering said active compound components to the specific target analytes in said subject. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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Specification