Murdoch University Research Repository

Welcome to the Murdoch University Research Repository

The Murdoch University Research Repository is an open access digital collection of research
created by Murdoch University staff, researchers and postgraduate students.

Learn more

Hyposialylated α1-acid glycoprotein inhibits phagocytosis of feline neutrophils

Rossi, G.ORCID: 0000-0003-4879-9504, Capitani, L., Ceciliani, F., Restelli, L. and Paltrinieri, S. (2013) Hyposialylated α1-acid glycoprotein inhibits phagocytosis of feline neutrophils. Research in Veterinary Science, 95 (2). pp. 465-471.

Link to Published Version:
*Subscription may be required


Feline α1-acid glycoprotein (fAGP) modifies both its serum concentration and its glycan moiety during diseases. fAGP is hyposialylated in cats with feline infectious peritonitis (FIP), but not in clinically healthy cats or in cats with other diseases. This study was aimed to determine whether hyposialylated fAGP influences phagocytosis. A flow cytometric method based on ingestion of fluoresceinated bacteria and adapted to feline blood was used to assess phagocytosis of leukocytes incubated with 'non-pathological' fAGP (purified from sera with normal concentrations of AGP) and 'pathological' fAGP (purified from sera with >1.5. mg/mL hyposialylated AGP). The flow cytometric method provided repeatable results for neutrophils (coefficients of variations, CVs <15%) but not for monocytes (CVs. > 20%) which had also a high individual variability. Compared with saline solution and with non-pathological fAGP, pathological fAGP significantly decreased phagocytosis in neutrophils and monocytes. This study demonstrated that hyposialylated fAGP down-regulates the phagocytic activity of feline neutrophils.

Item Type: Journal Article
Publisher: Harcourt Publishers Ltd
Copyright: © 2013 Elsevier Ltd.
Item Control Page Item Control Page