Process for producing sugar chain derivative, structure analysis method, and sugar chain derivative
A process for preparing an oligosaccharide derivative from an oligosaccharide mixture, the process being characterized in that the process comprises the steps of (a) introducing a lipophilic group into oligosaccharides of the mixture to obtain a mixture of oligosaccharide derivatives, and (b) treating the oligosaccharide derivative mixture by serotonin affinity column chromatography.
1. A process for preparing an oligosaccharide derivative of the formulae (1), (3) to (6) from an oligosaccharide mixture, the process being characterized in that the process comprises the steps of (a) introducing a lipophilic group into oligosaccharides of the mixture to obtain a mixture of oligosaccharide derivatives, and (b) treating the oligosaccharide derivative mixture by serotonin affinity column chromatography
wherein R 1 is 2-carboxyphenyl, 3-carboxyphenyl, 4-carboxyphenyl, p-ethoxycarbonylphenyl or 2-pyridyl, —R 2 of formula (4) is -Asn-R 3 , and R 2 of formula (6) is hydroxyl, -Asn or -Asn-R 3 , wherein Asn is asparagine, R 3 is a carbamate-type or amide-type protective group, and Ac is acetyl.
2. A process for preparing an oligosaccharide derivative according to claim 1 wherein the step (b) is followed by the step (c) of conducting normal phase chromatography with use of an amino column or amide column.
3. A process for preparing an oligosaccharide derivative according to claim 2 wherein the step (c) is preceded by the step (d) of treating the resulting eluate with a glycosidase.
4. A process for preparing an oligosaccharide derivative according to claim 1 wherein the lipophilic group is 2-carboxyphenylamino group or fluorenylmethoxycarbonyl group.
5. A process for preparing an oligosaccharide derivative according to claim 2 wherein the amino column is a polymer-base amino column.
6. A process for preparing an oligosaccharide derivative according to claim 2 wherein the amide column is a silica-base amide column.
7. A process for preparing an oligosaccharide derivative according to claim 1 wherein the oligosaccharide mixture is a mixture of natural oligosaccharides.
8. A process for preparing an oligosaccharide derivative according to claim 1 wherein the oligosaccharide mixture is derived from cells.
9. A process for preparing an oligosaccharide derivative according to claim 1 wherein the oligosaccharide mixture contains sialo oligosaccharides.
10. An oligosaccharide derivative represented by one of the formulae (1), (3) to (6)
wherein R 1 is 2-carboxyphenyl, 3-carboxyphenyl, 4-carboxyphenyl, p-ethoxycarbonylphenyl or 2-pyridyl, R 2 of formula (4) is -Asn-R 3 , and R 2 of formula (6) is hydroxyl, -Asn or -Asn-R 3 , wherein Asn is asparagine, R 3 is a carbamate-type or amide-type protective group, and Ac is acetyl.
11. A cancer marker selected from the group consisting of an oligosaccharide derivative represented by one of the formulae (1) to (6)
wherein R 1 is 2-carboxyphenyl, 3-carboxyphenyl, 4-carboxyphenyl, p-ethoxycarbonylphenyl or 2-pyridyl, R 2 of formula (4) is -Asn-R 3 , and R 2 of formula (6) is hydroxyl, -Asn or -Asn-R 3 , wherein Asn is asparagine, R 3 is a carbamate-type or amide-type protective group, and Ac is acetyl.
12. An oligosaccharide derivative selected from the group consisting of:
wherein Ac is acetyl and R 4 is 2-carboxyphenyl, 3-carboxyphenyl, 4-carboxyphenyl, p-ethoxycarbonylphenyl, 2-pyridyl, hydroxyl, Asn, or Asn-R 5 ; wherein Asn is asparagine, and R 5 is a carbamate-type or amide-type protective group.