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Variations in the Peritrophic Matrix Composition of Heparan Sulphate from the Tsetse Fly, Glossina morsitans morsitans.

Rogerson, Evelyn, Pelletier, Julien, Acosta Serrano, Alvaro ORCID:, Rose, Clair ORCID:, Taylor, Sarah, Guimond, Scott, Lima, Marcelo, Skidmore, Mark and Yates, Edwin (2018) 'Variations in the Peritrophic Matrix Composition of Heparan Sulphate from the Tsetse Fly, Glossina morsitans morsitans.'. Pathogens, Vol 7, Issue 1.

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Tsetse flies are the principal insect vectors of African-sleeping sickness in humans and Nagana in cattle. One of the tsetse fly species,, is host to the parasite,, a major cause of African trypanosomiasis. Precise details of the life cycle have yet to be established, but the parasite life cycle involves crossing the insect peritrophic matrix (PM). The PM consists of the polysaccharide chitin, several hundred proteins, and both glycosamino- and galactosaminoglycan (GAG) polysaccharides. Owing to the technical challenges of detecting small amounts of GAG polysaccharides, their conclusive identification and composition have not been possible until now. Following removal of PMs from the insects and the application of heparinases (bacterial lyase enzymes that are specific for heparan sulphate (HS) GAG polysaccharides), dot blots with a HS-specific antibody showed heparan sulphate proteoglycans (HSPGs) to be present, consistent withgenome analysis, as well as the likely expression of the HSPGs syndecan and perlecan. Exhaustive HS digestion with heparinases, fluorescent labeling of the resulting disaccharides with BODIPY fluorophore, and separation by strong anion exchange chromatography then demonstrated the presence of HS for the first time and provided the disaccharide composition. There were no significant differences in the type of disaccharide species present between genders or between ages (24 vs48 h post emergence), although the HS from female flies was more heavily sulphated overall. Significant differences, which may relate to differences in infection between genders or ages, were evident, however, in overall levels of 2--sulphation between sexes and, for females, between 24 and 48 h post-emergence, implying a change in expression or activity for the 2--sulphotransferase enzyme. The presence of significant quantities of disaccharides containing the monosaccharide GlcNAc6S contrasts with previous findings inand suggests subtle differences in HS fine structure between species of the.

Item Type: Article
Subjects: QU Biochemistry > Carbohydrates. Lipids > QU 75 Carbohydrates
QX Parasitology > QX 4 General works
QX Parasitology > Insects. Other Parasites > QX 650 Insect vectors
Faculty: Department: Biological Sciences > Department of Tropical Disease Biology
Biological Sciences > Vector Biology Department
Digital Object Identifer (DOI):
Depositing User: Stacy Murtagh
Date Deposited: 26 Mar 2018 16:02
Last Modified: 27 Sep 2019 15:30


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