| First Author | Hannigan M | Year | 2002 |
| Journal | Proc Natl Acad Sci U S A | Volume | 99 |
| Issue | 6 | Pages | 3603-8 |
| PubMed ID | 11904423 | Mgi Jnum | J:146418 |
| Mgi Id | MGI:3837540 | Doi | 10.1073/pnas.052010699 |
| Citation | Hannigan M, et al. (2002) Neutrophils lacking phosphoinositide 3-kinase gamma show loss of directionality during N-formyl-Met-Leu-Phe-induced chemotaxis. Proc Natl Acad Sci U S A 99(6):3603-8 |
| abstractText | Confocal imaging and time-lapsed videomicroscopy were used to study the directionality, motility, rate of cell movement, and morphologies of phosphoinositide 3-kinase gamma (PI3K)gamma(-/-) neutrophils undergoing chemotaxis in Zigmond chambers containing N-formyl-Met-Leu-Phe gradients. Most of the PI3Kgamma(-/-) neutrophils failed to translocate up the chemotactic gradient. A partial reduction in cell motility and abnormal morphologies were also observed. In the wild-type neutrophils, the pleckstrin homology domain-containing protein kinase B (AKT) and F-actin colocalize to the leading edge of polarized neutrophils oriented toward the gradient, which was not observed in PI3Kgamma(-/-) neutrophils. In PI3Kgamma(-/-) neutrophils, AKT staining consistently failed to perfectly overlap with the F-actin. This failure was observed as an F-actin-filled region of 2.3 +/- 0.5 microm between AKT and the cell membrane. These data suggest that PI3Kgamma regulates neutrophil chemotaxis primarily by controlling the direction of cell migration and the intracellular colocalization of AKT and F-actin to the leading edge. |
