Influencia sobre la respuesta inmune del tamaño del espaciador utilizado en la unión covalente de un polisacárido a una proteína

Authors

  • Maribel Cuello
  • Osmir Cabrera Instituto Finlay
  • Oliver Pérez Instituto Finlay
  • Judith del Campo Instituto Finlay
  • Miguel E. Martínez Instituto Finlay
  • Jonatan Hernández Instituto Finlay
  • Gustavo Sierra Instituto Finlay

Abstract

The spacer arms are organic chemical reagents that present in their structure, useful functional groups for the covalent union with other molecules. Up to now the moment there are several that are used for the union of two antigens with the objective of increasing the immunogenicity of at least one of them. The influence on immune response of spacer arms with different size used in N. meningitides serogroup C polysaccharide (PMGC)-tetanus toxoid (TT) conjugated was evaluated in Balb/c mice.The 1,3-diaminopropan, 1,6-diaminohexane and 1,8-diaminooctane were used as spacer arms of different size, linked to PMGC and TT by using carbodiimidemediated coupling. The generation of IgM anti PMGC, IgG anti PMGC and IgG anti TT was evaluated in serum from animals by an indirect ELISA.
Also IgG subclasses (IgG1 and IgG2a) anti PMGC were evaluated. The IgG antibodies response of conjugate inoculated was significantly higher than native polysaccharide and this response was size spacer dependent, being significantly higher with 1,8-diaminooctane; a statistically significant increase of IgG2a  subclasses was also found in this group. The data suggest that immune response was developed by induction of cellular pattern. The IgG antibodies response of  conjugate inoculated was significantly higher than native TT, although significant differences among spacers were not found.

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Published

2022-03-09

How to Cite

Cuello, M. ., Cabrera, O. ., Pérez, O. ., del Campo, J. ., Martínez, M. E., Hernández, J. ., & Sierra, G. . (2022). Influencia sobre la respuesta inmune del tamaño del espaciador utilizado en la unión covalente de un polisacárido a una proteína. NATIONAL CENTER FOR SCIENTIFIC RESEARCH (CENIC) BIOLOGICAL SCIENCES JOURNAL, 33(2), 071-075. Retrieved from https://revista.cnic.edu.cu/index.php/RevBiol/article/view/1281

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Section

Research articles