title: Desialylation of plasma proteins in severe dengue infection: possible role of oxidative stress.
abstract: Oxidative stress in dengue infection has been suggested. This study was carried out to explore the plasma protein oxidation and its sialic acid content in dengue infection. Thirty-two dengue hemorrhagic fever (DHF), 25 dengue shock syndrome (DSS), 29 dengue fever (DF), and 63 healthy controls were included in this study. The extent of carbonylation, sulphydryl content, and desialylation of plasma protein was estimated in acute phase sample. Significantly higher levels of protein carbonyls and lower levels of sialic acid and sulphydryl groups were found in DHF and DSS compared with DF using one-way analysis of variance. Regression analysis showed that desialylation is dependent on protein carbonyls in DHF/DSS. This study indicates that, in dengue infection, plasma proteins undergo increased levels of desialylation, which can be attributed to the oxidative stress. Future studies on sialylation status of endothelium and platelets can show light into the pathogenesis of the dengue infection.
authors.affiliation: Department of Molecular Biology and Bioinformatics, Vector Control Research Centre, Pondicherry, India.
authors.forename: Soundravally
authors.initials: S
authors.lastname: Rajendiran
authors.forename: Hoti Sugeerappa
authors.initials: HS
authors.lastname: Lakshamanappa
authors.forename: Bobby
authors.initials: B
authors.lastname: Zachariah
authors.forename: Selvaraj
authors.initials: S
authors.lastname: Nambiar
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D001798:Blood Proteins / Q000378:metabolism*; D016022:Case-Control Studies; D004196:Disease Outbreaks; D005260:Female; D006801:Humans; D007194:India / Q000453:epidemiology; D008297:Male; D008875:Middle Aged; D019158:N-Acetylneuraminic Acid / Q000378:metabolism*; D018384:Oxidative Stress / Q000502:physiology*; D019595:Severe Dengue / Q000097:blood* / Q000453:epidemiology / Q000378:metabolism*
chemical_list: D001798:Blood Proteins; D019158:N-Acetylneuraminic Acid