» Articles » PMID: 28106075

Phosphatidylinositol 3,4-bisphosphate Regulates Neurite Initiation and Dendrite Morphogenesis Via Actin Aggregation

Overview
Journal Cell Res
Specialty Cell Biology
Date 2017 Jan 21
PMID 28106075
Citations 19
Authors
Affiliations
Soon will be listed here.
Abstract

Neurite initiation is critical for neuronal morphogenesis and early neural circuit development. Recent studies showed that local actin aggregation underneath the cell membrane determined the site of neurite initiation. An immediately arising question is what signaling mechanism initiated actin aggregation. Here we demonstrate that local clustering of phosphatidylinositol 3,4-bisphosphate (PI(3,4)P), a phospholipid with relatively few known signaling functions, is necessary and sufficient for aggregating actin and promoting neuritogenesis. In contrast, the related and more extensively studied phosphatidylinositol 4,5-bisphosphate or phosphatidylinositol (3,4,5)-trisphosphate (PIP) molecules did not have such functions. Specifically, we showed that beads coated with PI(3,4)P promoted actin aggregation and neurite initiation, while pharmacological interference with PI(3,4)P synthesis inhibited both processes. PI(3,4)P clustering occurred even when actin aggregation was pharmacologically blocked, demonstrating that PI(3,4)P functioned as the upstream signaling molecule. Two enzymes critical for PI(3,4)P generation, namely, SH2 domain-containing inositol 5-phosphatase and class II phosphoinositide 3-kinase α, were complementarily and non-redundantly required for actin aggregation and neuritogenesis, as well as for subsequent dendritogenesis. Finally, we demonstrate that neural Wiskott-Aldrich syndrome protein and the Arp2/3 complex functioned downstream of PI(3,4)P to mediate neuritogenesis and dendritogenesis. Together, our results identify PI(3,4)P as an important signaling molecule during early development and demonstrate its critical role in regulating actin aggregation and neuritogenesis.

Citing Articles

Attenuated cerebellar phenotypes in Inpp4a truncation mutants with preserved phosphatase activity.

Tran D, Yoshioka N, Bizen N, Mori-Ochiai Y, Yano M, Yanai S Dis Model Mech. 2023; 16(7).

PMID: 37415561 PMC: 10399444. DOI: 10.1242/dmm.050169.


The cytoplasmic localization of ADNP through 14-3-3 promotes sex-dependent neuronal morphogenesis, cortical connectivity, and calcium signaling.

Bennison S, Blazejewski S, Liu X, Hacohen-Kleiman G, Sragovich S, Zoidou S Mol Psychiatry. 2023; 28(5):1946-1959.

PMID: 36631597 DOI: 10.1038/s41380-022-01939-3.


PtdIns(3,4)P2, Lamellipodin, and VASP coordinate actin dynamics during phagocytosis in macrophages.

Montano-Rendon F, Walpole G, Krause M, Hammond G, Grinstein S, Fairn G J Cell Biol. 2022; 221(11).

PMID: 36165850 PMC: 9521245. DOI: 10.1083/jcb.202207042.


Serum exosomal coronin 1A and dynamin 2 as neural tube defect biomarkers.

Wang Y, Ma L, Jia S, Liu D, Gu H, Wei X J Mol Med (Berl). 2022; 100(9):1307-1319.

PMID: 35915349 PMC: 9402777. DOI: 10.1007/s00109-022-02236-w.


Striking a balance: PIP and PIP signaling in neuronal health and disease.

Tariq K, Luikart B Explor Neuroprotective Ther. 2022; 1:86-100.

PMID: 35098253 PMC: 8797975. DOI: 10.37349/ent.2021.00008.


References
1.
Bae Y, Lee T, Park J, Hur J, Kim Y, Heo K . Identification of a compound that directly stimulates phospholipase C activity. Mol Pharmacol. 2003; 63(5):1043-50. DOI: 10.1124/mol.63.5.1043. View

2.
Dowler S, Currie R, Campbell D, Deak M, Kular G, Downes C . Identification of pleckstrin-homology-domain-containing proteins with novel phosphoinositide-binding specificities. Biochem J. 2000; 351(Pt 1):19-31. PMC: 1221362. DOI: 10.1042/0264-6021:3510019. View

3.
Vanhaesebroeck B, Guillermet-Guibert J, Graupera M, Bilanges B . The emerging mechanisms of isoform-specific PI3K signalling. Nat Rev Mol Cell Biol. 2010; 11(5):329-41. DOI: 10.1038/nrm2882. View

4.
Kwiatkowski A, Rubinson D, Dent E, van Veen J, Leslie J, Zhang J . Ena/VASP Is Required for neuritogenesis in the developing cortex. Neuron. 2007; 56(3):441-55. DOI: 10.1016/j.neuron.2007.09.008. View

5.
Kimberley McAllister A . Dynamic aspects of CNS synapse formation. Annu Rev Neurosci. 2007; 30:425-50. PMC: 3251656. DOI: 10.1146/annurev.neuro.29.051605.112830. View