The effect of conglutinin on production of reactive oxygen species in bovine granulocytes
The effect of conglutinin on production of reactive oxygen species in bovine granulocytes
- Marta Dec*, Andrzej Wernicki, Andrzej Puchalski, Renata Urban-Chmiel, Adam Wa?ko
- 대한수의학회
- Journal of Veterinary Science
- 제13권 제1호
- 등재여부 : KCI등재
- 2012.03
- 33 - 38 (6 pages)
Conglutinin is a high molecular-weight lectin originally detected in bovine serum. It belongs to the family of collectins that bind sugar residues in a Ca-dependent manner and are effector molecules in innate immunity. Conglutinin appears to play an important role in immune defense mechanisms, showing antiviral and antibacterial activities when tested in vivo and in vitro. The present study evaluated the effect of conglutinin on the respiratory bursts in bovine peripheral phagocytes. Using nitroblue tetrazolium and hydrogen peroxide assays, we showed that sugar ligand- bound conglutinin stimulated the production of superoxide and H<sub>2</sub>O<sub>2</sub> in granulocytes whereas the non-sugar-bound form of conglutinin inhibited these processes. These results indicate that both forms of conglutinin are able to interact with surface leukocyte receptors but have opposite effects on phagocytic activity. Our findings suggest that conglutinin bound to sugar residues on microbial surfaces can induce oxygen burst in phagocytes, and thereby mediates the elimination of pathogens and prevents the spread of infection.