Fluorescent somatostatin
First Claim
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1. A compound of the formula:
- ##STR3## wherein R1 is a light-emitting moiety;
R2 is Y-Z-Q, whereinZ comprises -Phe-Phe-Trp-Lys-Thr- (SEQ ID NO;
1) or -Phe-Phe-D-Trp-Lys-Thr-;
each of Y and Q is an amino acid sequence such that the number of amino acids in R2 is between 7 and 28; and
CX is C═
O, C═
S, --CHOH, C═
C═
O, C═
NH, -CH2, --CHOR, --C═
NR, --CHR, --CR3 R4, wherein each of R, R4, and R3, independently, is H or a C1 -C6 branched or unbranched, substituted or unsubstituted alkyl; and
C of X-C is bonded via an --NH-- or --S-- group to an amino acid of R2 ; and
wherein said compound, when compared to R2 alone, retains at least 25% of its binding affinity for the human somatostatin receptor in vivo.
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Abstract
Light-emitting compounds of the formula: ##STR1## where R1 is a light-emitting moiety and R2 is a somatostatin-based peptide featuring a first amino acid sequence -Phe-Phe-Trp-Lys-Thr- or (SEQ ID NO:1) or -Phe-Phe-D-Trp-Lys-Thr-. The peptide is linked at a first amino acid position to (C-X), and the light-emitting compound exhibits substantial biological activity in the presence of a receptor having affinity for somatostatin-based peptides.
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Citations
21 Claims
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1. A compound of the formula:
- ##STR3## wherein R1 is a light-emitting moiety;
R2 is Y-Z-Q, whereinZ comprises -Phe-Phe-Trp-Lys-Thr- (SEQ ID NO;
1) or -Phe-Phe-D-Trp-Lys-Thr-;
each of Y and Q is an amino acid sequence such that the number of amino acids in R2 is between 7 and 28; and
CX is C═
O, C═
S, --CHOH, C═
C═
O, C═
NH, -CH2, --CHOR, --C═
NR, --CHR, --CR3 R4, wherein each of R, R4, and R3, independently, is H or a C1 -C6 branched or unbranched, substituted or unsubstituted alkyl; and
C of X-C is bonded via an --NH-- or --S-- group to an amino acid of R2 ; and
wherein said compound, when compared to R2 alone, retains at least 25% of its binding affinity for the human somatostatin receptor in vivo. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 21)
- ##STR3## wherein R1 is a light-emitting moiety;
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16. A compound of the formula:
- ##STR4## wherein R1 is a light-emitting moiety;
R2 is Y-Z-Q, wherein Z comprises -Phe-Phe-Trp-Lys-Thr- (SEQ ID NO;
1) or -Phe-Phe-D-Trp-Lys-Thr-;
each of Y and Q is an amino acid sequence such that the number of amino acids in R2 is between 7 and 28; and
CX is C═
O, C═
S, --CHOH, C═
C═
O, C═
NH, --CH2, --CHOR, --C═
NR, --CHR, --CR3 R4, wherein each of R, R4, and R3, independently, is H or a C1 -C6 branched or unbranched, substituted or unsubstituted alkyl; and
C of X-C is bonded via an --NH-- or --S-- group to an amino acid of R2 ; and
wherein said compound is selected from a mixture including said compound and secondary compounds having biological activities less than 0.25% of the biological activity of R2 --H in the presence of a receptor having affinity for somatostatin-based peptides. - View Dependent Claims (17, 18, 19, 20)
- ##STR4## wherein R1 is a light-emitting moiety;
Specification