Structural details and composition of Trichomonas vaginalis lipophosphoglycan in relevance to the epithelial immune function.

Abstract:

:Trichomonas vaginalis causes the most common non-viral sexually transmitted infection linked to increased risk of premature birth, cervical cancer and HIV. This study defines molecular domains of the parasite surface glycoconjugate lipophosphoglycan (LPG) with distinct functions in the host immunoinflammatory response. The ceramide phospho-inositol glycan core (CPI-GC) released by mild acid had Mr of approximately 8,700 Da determined by MALDI-TOF MS. Rha, GlcN, Gal and Xyl and small amounts of GalN and Glc were found in CPI-GC. N-acetyllactosamine repeats were identified by endo-beta-galactosidase treatment followed by MALDI-MS and MS/MS and capLC/ESI-MS/MS analyses. Mild acid hydrolysis led to products rich in internal deoxyhexose residues. The CPI-GC induced chemokine production, NF-kappaB and extracellular signal-regulated kinase (ERK)1/2 activation in human cervicovaginal epithelial cells, but neither the released saccharide components nor the lipid-devoid LPG showed these activities. These results suggest a dominant role for CPI-GC in the pathogenic epithelial response to trichomoniasis.

journal_name

Glycoconj J

journal_title

Glycoconjugate journal

authors

Singh BN,Hayes GR,Lucas JJ,Sommer U,Viseux N,Mirgorodskaya E,Trifonova RT,Sassi RR,Costello CE,Fichorova RN

doi

10.1007/s10719-008-9157-1

subject

Has Abstract

pub_date

2009-01-01 00:00:00

pages

3-17

issue

1

eissn

0282-0080

issn

1573-4986

journal_volume

26

pub_type

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