Rho Signaling Inhibitor, CCG-1423, Inhibits Axonal Elongation and Dendritic Complexity of Rat Cortical Neurons

Keietsu Kikuchi, Jun Shiota, Tetsuya Yamada, Mitsuru Ishikawa, Daisuke Ihara, Mamoru Fukuchi, Masaaki Tsuda, Akiko Tabuchi

Biochem Biophys Res Commun. 2017 Oct 21;492(3):474-479.

PMID: 28830810

Abstract:

CCG-1423, a chemical inhibitor of Rho signaling, blocks serum response factor (SRF)/megakaryoblastic leukemia 1 (MKL1)-mediated gene expression by inhibiting the nuclear accumulation of MKL1. Several studies have suggested that CCG-1423 interacts not only with MKL1, which has a critical role in the regulation of neuronal morphology, but also with phosphatase and actin regulator 1 (Phactr1), which is localized at synapses. However, the effect of CCG-1423 on neuronal cells, especially on neuronal morphology, remains to be determined. In this study, we focused on the effect of CCG-1423 on axonal elongation, dendritic length, dendritic complexity and dendritic spine morphology. Incubation of cortical neuron cultures with up to 10 μM CCG-1423 for 72 h did not significantly affect cell viability. CCG-1423 inhibited axonal elongation and blocked the increase of dendritic length and complexity, but did not affect dendritic spine morphology. Here, we demonstrated for the first time that CCG-1423 affects neurite elongation, except for dendritic spines, without affecting neuronal cell viability. This study provides a better understanding of the effects of CCG-1423 on neurons, which may be useful for the assessment of the potential clinical application of CCG-1423 and its derivatives.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP285986881-A	CCG-1423		285986-88-1	Price