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Thymus-Independent Antigens: The Preparation of Covalent, Hapten-Ficoll Conjugates

John K. Inman
J Immunol February 1, 1975, 114 (2 Part 1) 704-709;
John K. Inman
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Abstract

A general approach is presented for covalently attaching carboxyl and primary amino groups to Ficoll and other high molecular weight polysaccharides in a readily controlled manner. The polysaccharides are o-carboxymethylated with chloroacetate in NaOH solutions. Amino groups are next introduced by monoamide formation with ethylenediamine using a water-soluble carbodiimide. Reactions are carried out in aqueous solutions; excess reactants and by-products are removed by dialysis. Three different ways for coupling the 2,4-dinitrophenyl hapten to the amino derivative of Ficoll are described. Preliminary evidence indicates that 2,4-dinitrophenyl-Ficolls, prepared by procedures developed in this study, are potent thymus-independent antigens which can specifically stimulate B cells both in vivo and in vitro. Hapten-Ficoll conjugates should be exceptionally useful for studies of B lymphocyte activation because of the ready availability of the starting material and the ease with which a wide variety of hapten derivatives may be prepared.

  • Received August 26, 1974.
  • Copyright © 1975 by The American Association of Immunologists, Inc.

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The Journal of Immunology
Vol. 114, Issue 2 Part 1
1 Feb 1975
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Thymus-Independent Antigens: The Preparation of Covalent, Hapten-Ficoll Conjugates
John K. Inman
The Journal of Immunology February 1, 1975, 114 (2 Part 1) 704-709;

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Thymus-Independent Antigens: The Preparation of Covalent, Hapten-Ficoll Conjugates
John K. Inman
The Journal of Immunology February 1, 1975, 114 (2 Part 1) 704-709;
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