chlamydia infections/carbohydrate

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In vitro effect of natural and semi-synthetic carbohydrate polymers on Chlamydia trachomatis infection.

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The effect of different natural and semi-synthetic polysaccharides on Chlamydia trachomatis multiplication in Hela 229 cells was evaluated. Some neutral, negatively and positively charged carbohydrates were able, in a dose-dependent fashion, to inhibit chlamydial infection by interfering mainly with

Protein-carbohydrate-lipid complex isolated from the cell envelopes of Chlamydia psittaci in alkaline buffer and ethylenediaminetetraacetate.

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Exposure of isolated cell envelopes from purified infectious elementary (EB) of Chlamydia psittaci to sodium carbonate-bicarbonate buffer at pH 10 plus ethylenediaminetetraacetate (EDTA) results in partial solubilization of the total protein. The released materials represent 20% of the dry weight,

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

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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

A monoclonal antibody against a carbohydrate epitope in lipopolysaccharide differentiates Chlamydophila psittaci from Chlamydophila pecorum, Chlamydophila pneumoniae, and Chlamydia trachomatis.

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Lipopolysaccharide (LPS) of Chlamydophila psittaci but not of Chlamydophila pneumoniae or Chlamydia trachomatis contains a tetrasaccharide of 3-deoxy-alpha-d-manno-oct-2-ulopyranosonic acid (Kdo) of the sequence Kdo(2-->8)[Kdo(2-->4)] Kdo(2-->4)Kdo. After immunization with the synthetic

An N-linked high-mannose type oligosaccharide, expressed at the major outer membrane protein of Chlamydia trachomatis, mediates attachment and infectivity of the microorganism to HeLa cells.

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The structure of the carbohydrate of the 40-kD major outer membrane component of Chlamydia trachomatis and its role in defining infectivity of the organism were investigated. The oligosaccharides were released from the glycoprotein by N-glycanase digestion, coupled to a 2-aminopyridyl residue, and

Comprehensive Flux Modeling of Chlamydia trachomatis Proteome and qRT-PCR Data Indicate Biphasic Metabolic Differences Between Elementary Bodies and Reticulate Bodies During Infection.

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Metabolic adaptation to the host cell is important for obligate intracellular pathogens such as Chlamydia trachomatis (Ct). Here we infer the flux differences for Ct from proteome and qRT-PCR data by comprehensive pathway modeling. We compare the comparatively inert infectious

The tick-borne rickettsia Cowdria ruminantium has a Chlamydia-like developmental cycle.

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The development of the tick-borne rickettsial pathogen Cowdria ruminantium (S stock) was studied in bovine umbilical endothelial (BUE) cell cultures and in goat choroid plexus, by light- and electron microscopy. Cowdria divided by binary fission within intracytoplasmic vacuoles resulting in large

Chlamydia pneumoniae binds to the lectin-like oxidized LDL receptor for infection of endothelial cells.

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The association of Chlamydia pneumoniae and atherosclerosis has been well documented. Recently, it has been demonstrated that C. pneumoniae up-regulates expression of the lectin-like ox-LDL receptor (LOX-1) in endothelial cells. Many of the pro-atherogenic effects of ox-LDL occur through its

Immunochemical analysis of antigenic determinants of Chlamydia trachomatis by monoclonal antibodies.

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Monoclonal antibodies to outer membrane of Chlamydia trachomatis lymphogranuloma venereum (LGV) strain L1 (440-L) were used for antigen characterization. Two separate type-specific antigenic determinants (epitopes) and one species-specific epitope were represented in the major outer-membrane protein

The genus-specific lipopolysaccharide epitope of Chlamydia is assembled in C. psittaci and C. trachomatis by glycosyltransferases of low homology.

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Chlamydiae possess a genus-specific epitope that is located on the lipopolysaccharide (LPS) and is composed of a 3-deoxy-D-manno-octulosonic acid (Kdo) trisaccharide of the sequence alpha Kdo-(2-->8)--alpha Kdo-(2-->4)-alpha Kdo. In Chlamydia trachomatis, this trisaccharide is biosynthetically

Attachment of Chlamydia psittaci to formaldehyde-fixed and unfixed L cells.

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The attachment of Chlamydia psittaci, strain 6BC, to formaldehyde-fixed and unfixed L cells was studied. Cations were found to be required for attachment to both fixed and unfixed cells. The requirement for cations was largely eliminated when the net negative surface charge on fixed cells was

[Enzyme immunoassay of masked complement component C4 deficiency in patients with urogenital Chlamydia infection].

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OBJECTIVE Development of new method of C4B isotype functional activity evaluation in enzyme immunoassay by using pharmaceutical preparation derinat as a classical pathway complement activator and its use for blood sera isotyping in confirmed urogenital tract chlamydia infection. METHODS Enzyme

Location of polysaccharide on Chlamydia psittaci by silver-methenamine staining and electron microscopy.

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Previous serological studies have indicated that the group antigen of chlamydial organisms is composed of an acidic polysaccharide and a lipid component. The present study was undertaken in an effort to locate this polysaccharide complex by use of electron microscopy and a silver-methenamine marker.

Purification of Chlamydia trachomatis lymphogranuloma venereum elementary bodies and their interaction with HeLa cells.

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A procedure has been developed to yield infectious elementary bodies of the lymphogranuloma venereum strains LGV 434 and 404 of Chlamydia trachomatis, labelled during intracellular growth in HeLa 229 cells. The final preparation, obtained after velocity sedimentation of a polycarbonate

Temporal analysis of the developing Chlamydia psittaci inclusion by use of fluorescence and electron microscopy.

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The chlamydiae are obligate intracellular parasites that develop and multiply within a vacuole (termed an inclusion) that does not fuse with lysosomes. Inclusion morphology varies dramatically among the different chlamydiae, particularly within the species Chlamydia psittaci. Some strains develop

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