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. 1990 Jun;80(3):420–425. doi: 10.1111/j.1365-2249.1990.tb03304.x

Jacalin: a lectin mitogenic for human CD4 T lymphocytes.

N Pineau 1, P Aucouturier 1, J C Brugier 1, J L Preud'homme 1
PMCID: PMC1535199  PMID: 2372991

Abstract

The major protein component of seeds from jackfruit is the lectin jacalin. Jackfruit crude extracts are known to stimulate human lymphocytes, but the mitogenic properties of purified jacalin have not been studied in detail so far. Study of the proliferative response of cell populations from normal human peripheral blood to purified jacalin showed it to be mitogenic through an interaction with lymphocytes by its lectin-binding site, as shown by inhibition by IgA. Jacalin failed to stimulate B cells to proliferate and to undergo plasma cell maturation. It induced a proliferation of CD4 (and not CD8) lymphocytes, as shown by phenotypic analysis of cells recovered after culture and by studies of the response of isolated T cell subpopulations. The proliferative response to jacalin was autologous monocyte-dependent. The kinetics of jacalin-induced DNA synthesis, expression of CD25 and interleukin-2 secretion was shifted by comparison with that induced by phytohaemagglutinin. The reason for the restricted responsiveness of CD4 T cells is presently unclear; jacalin bound to all blood cells and did not significantly co-cap with CD1, CD2, CD3, CD4, CD8 and CD38, and jacalin response was neither enhanced nor inhibited by antibodies to these surface antigens.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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