Peer-Reviewed Journal Details
Mandatory Fields
Renwick, J;Reeves, EP;Wientjes, FB;Kavanagh, K
2007
January
Developmental and Comparative Immunology
Translocation of proteins homologous to human neutrophil p47(phox) and p67(phox) to the cell membrane in activated hemocytes of Galleria mellonella
Published
29 ()
Optional Fields
PHAGOCYTE NADPH OXIDASE CHRONIC GRANULOMATOUS-DISEASE ASPERGILLUS-FUMIGATUS PSEUDOMONAS-AERUGINOSA FLAVOCYTOCHROME B(558) COMPONENT P67(PHOX) INSECT IMMUNITY PLASMA-MEMBRANE 2-HYBRID SYSTEM KINASE-C
31
347
359
Activation of the superoxide forming respiratory burst oxidase of human neutrophils, crucial in host defence, requires the cytosolic proteins p47(phox) and p67(phox) which translocate to the plasma membrane upon cell stimulation and activate flavocytochrome b(558), the redox centre of this enzyme system. We have previously demonstrated the presence of proteins (67 and 47 kDa) in hemocytes of the insect Galleria mellonella homologous to proteins of the superoxide-forming NADPH oxidase complex of neutrophils. The work presented here illustrates for the first time translocation of homologous hemocyte proteins, 67 and 47 kDa from the cytosol to the plasma membrane upon phorbol 12-myristate 13 acetate (PMA) activation. In hemocytes, gliotoxin (GT), the fungal secondary metabolite significantly suppressed PMA-induced superoxide generation in a concentration dependent manner and reduced translocation to basel nonstimulated levels. Primarily these results correlate translocation of hemocyte 47 and 67 kDa proteins with PMA induced oxidase activity. Collectively results presented here, demonstrate further cellular and functional similarities between phagocytes of insects and mammals and further justify the use of insects in place of mammals for modelling the innate immune response to microbial pathogens. (c) 2006 Elsevier Ltd. All rights reserved.
OXFORD
0145-305X
10.1016/j.dci.2006.06.007
Grant Details