2010
DOI: 10.1083/jcb.201004005
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Class I and class III phosphoinositide 3-kinases are required for actin polymerization that propels phagosomes

Abstract: Phagosomes formed by engagement of complement receptors (CR3) are moved within macrophages by PI3K-driven formation of actin “comet tails” on the phagosomal membrane.

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Cited by 80 publications
(98 citation statements)
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References 36 publications
(58 reference statements)
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“…Early phagosomes contained both type II PI4Ks, which is in line with earlier reports (5,43). In contrast, phagolysosomes and lysosomes contained PI4KIIα (our data, and refs.…”
Section: Discussionsupporting
confidence: 82%
See 1 more Smart Citation
“…Early phagosomes contained both type II PI4Ks, which is in line with earlier reports (5,43). In contrast, phagolysosomes and lysosomes contained PI4KIIα (our data, and refs.…”
Section: Discussionsupporting
confidence: 82%
“…However, in vivo, PI(3)P is thought to be mainly generated by the class III PI3K Vps34 (26). Here, an antibody that specifically inhibits Vps34 activity (5,(27)(28)(29), blocked PLF (Fig. 4A) and decreased LBP contents in PI(3)P to the same degree as the PI3K inhibitors WM, 3-MA, or Pik-93 (Fig.…”
Section: Plf Requires Phosphatidylinositol 4-phosphate and Phosphatidmentioning
confidence: 99%
“…However, most of the evidence has been collected at the plasma membrane, and it is unclear whether lipids control actin dynamics on lysosomal organelles. Until recently it was thought that the human class III phosphoinositide 3-kinase (PI3K) subunit Vps34 (also known as PIK3C3) did not play a role in the regulation of actin remodeling; however, Grinstein and colleagues have reported that both class I and class III PI3Ks play a crucial role in regulating actin polymerization on phagosomal membranes (Bohdanowicz et al, 2010). Here, we determined the effect of regulatory lipids on actin dynamics at the vertex ring.…”
Section: Snares and Hops Regulate Actin Enrichmentmentioning
confidence: 99%
“…Depending on the cellular function, the polymerization of actin deforms membranes into a variety of shapes including pseudopods, lamellipodia, filopodia, podosomes and pedestals (Albiges-Rizo et al, 2009;Hartwig and Yin, 1988;Mogilner and Keren, 2009;Vallance and Finlay, 2000). In most pathways, the regulation of actin polymerization has been linked to lipids including PtdIns(4,5)P 2 and cholesterol, and more recently 3-phosphoinositides (Babst et al, 2000;Bohdanowicz et al, 2010;Rozelle et al, 2000). During vacuole fusion, actin remodeling occurs at two distinct stages of the pathway.…”
Section: Introductionmentioning
confidence: 99%
“…Para que seja possível o englobamento dessa partícula, filamentos de F-actina acumulam-se na região do fagossoma nascente, entretanto, alguns minutos após a formação o fagossomo ocorre despolimerização da Factina para impedir a fusão de membranas intracelulares ao fagossomo. Diferente da fagocitose mediada por receptores Fc, quando o processo é ocorre via receptores CR3, uma segunda onda de polimerização de actina é observada ao redor dos fagossomos maduros e completamente internalizados (Bohdanowics et al, 2010).…”
Section: Fagocitoseunclassified