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. 1983 Dec;42(3):930–935. doi: 10.1128/iai.42.3.930-935.1983

Attachment and internalization of a Chlamydia trachomatis lymphogranuloma venereum strain by McCoy cells: kinetics of infectivity and effect of lectins and carbohydrates.

G Söderlund, E Kihlström
PMCID: PMC264388  PMID: 6642670

Abstract

The kinetics of attachment and ingestion of Chlamydia trachomatis serotype L1 by monolayers of McCoy cells were studied by using a method that discriminated between attachment and uptake. When about 1% of the McCoy cells was infected, the proteinase K-resistant chlamydial fraction, regarded as ingested chlamydiae, reached a constant value after about 3 h of incubation at 37 degrees C. Uptake of chlamydiae at 4 degrees C could not be demonstrated. The attached and ingested chlamydial fractions were constant over an eightfold increase in chlamydial inoculum. Chitobiose and chitotriose, the di- and trisaccharides of N-acetyl-D-glucosamine, reduced the association of C. trachomatis serotype L1 with McCoy cells. Higher concentrations of chitobiose also selectively inhibited ingestion of chlamydiae. A corresponding effect of chitobiose was also observed on the number of chlamydial inclusions. Wheat germ agglutinin, specific for N-acetyl-D-glucosamine residues, reduced the association of chlamydiae when incubated at 4 degrees C, but not at 37 degrees C. A small inhibiting effect of concanavalin A on association of chlamydiae, but no effect of the corresponding carbohydrates, indicates a nonspecific effect on chlamydial attachment of this lectin. These results suggest that beta 1 leads to 4-linked oligomers of N-acetyl-D-glucosamine are important in the specificity of attachment of C. trachomatis to McCoy cells.

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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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