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. 1978 Apr;20(1):12–19. doi: 10.1128/iai.20.1.12-19.1978

Nonspecific immunostimulant activities of synthetic trehalose-6,6'-diesters (lower homologs of cord factor).

M Parant, F Audibert, F Parant, L Chedid, E Soler, J Polonsky, E Lederer
PMCID: PMC421542  PMID: 352926

Abstract

Mycobacterial cord factors (6,6'-diesters of trehalose with mycolic acids ranging from C80 to C90) have been shown to protect mice effectively against infection with Klebsiella pneumoniae or with Listeria monocytogenes. Our present findings indicate that the low-molecular-weight cord factor of Corynebacterium diphtheriae (with corynomycolic acids ranging from C28 PTO C36) is equally active. Moreover, its synthetic analog (with synthetic C32 mycolic acid) has the same activity. Two lower synthetic 6,6'-diesters of trehalose with C22 acids, which are described here for the first time, as well as dipalmitate and a dioleate of sucrose, were found inactive. The synthetic C76 trehalose diesters, which are capable of enhancing nonspecific resistance to infection, increase the immune response in mice, even when injected in metabolizable oil. They induce in the injected paws an inflammatory process weaker and more transient than the natural cord factor.

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Selected References

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