A glycoprotein with anti-inflammatory properties secreted by an Aspergillus nidulans modified strain

Total RNA from lipopolysaccharide (LPS)-stimulated rat macrophages used to treat protoplasts from an Aspergillus nidulans strain originated the RT2 regenerated strain, whose culture supernatant showed anti-inflammatory activity in Wistar rats. The protein fraction presenting such anti-inflammatory a...

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Bibliographic Details
Published in:Journal of Venomous Animals and Toxins including Tropical Diseases
Main Authors: J. C. F. Queiroz, C. F. P. Teixeira, I. Lebrun, P. J. Spencer, T. M. A. D. Zucchi
Format: Article in Journal/Newspaper
Language:English
Published: SciELO 2007
Subjects:
Aspergillus nidulans
protein purification and characterization
glycoprotein
anti-inflammatory activity
Arctic medicine. Tropical medicine
RC955-962
Toxicology. Poisons
RA1190-1270
Zoology
QL1-991
Arctic
Online Access:https://doi.org/10.1590/S1678-91992007000200010
https://doaj.org/article/93b8a7f215ab4e6e931ad65311b2d708
Description
Summary:Total RNA from lipopolysaccharide (LPS)-stimulated rat macrophages used to treat protoplasts from an Aspergillus nidulans strain originated the RT2 regenerated strain, whose culture supernatant showed anti-inflammatory activity in Wistar rats. The protein fraction presenting such anti-inflammatory activity was purified and biochemically identified. The screening of the fraction responsible for such anti-inflammatory property was performed by evaluating the inhibition of carrageenan-induced paw edema in male Swiss mice. Biochemical analyses of the anti-inflammatory protein used chromatography, carbohydrates quantification of the protein sample, amino acids content analysis and sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE). Total sugar quantification revealed 32% glycosylation of the protein fraction. Amino acid analysis of such fraction showed a peculiar pattern presenting 29% valine. SDS-PAGE revealed that the protein sample is pure and its molecular weight is about 40kDa. Intravenous injection of the isolated substance into mice significantly inhibited carrageenan-induced paw edema. The isolated glycoprotein decreased carrageenan-induced paw edema in a prostaglandin-dependent phase, suggesting an inhibitory effect of the isolated glycoprotein on prostaglandin synthesis.

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