Abstract
Purpose
Neuroblastoma arises from developmental block of embryonic neural crest cells and is one of the most common and deadly pediatric tumors. However, the mechanism underlying this block is still unclear. Here, we show that targeting Rho guanine nucleotide exchange factor 12 (ARHGEF12, also named LARG) promotes MYCN degradation and neuroblastoma differentiation, leading to reduced neuroblastoma malignancy.
Methods
The neuroblastoma TARGET dataset was downloaded to assess ARHGEF12 expression. Cell differentiation, proliferation, colony formation and cell migration analyses were performed to investigate the effects of ARHGEF12 knockdown on neuroblastoma cells. Western blotting and immunohistochemistry were employed to determine protein expression. Animal xenograft models were used to investigate antitumor effects after ARHGEF12 knockdown or treatment with the ARHGEF12 inhibitor Y16 in vivo.
Results
We found that the expression level of ARHGEF12 was higher in neuroblastoma than in better-differentiated ganglioneuroblastoma. Knockdown of ARHGEF12 promoted neuroblastoma differentiation, decreased stemness-related gene expression, and increased differentiation-related gene expression. ARHGEF12 knockdown reduced tumor growth, and the resulting tumors showed bigger tumor cells compared to those in control neuroblastoma xenografts. In addition, it was found that ARHGEF12 knockdown promoted MYCN ubiquitination and degradation in MYCN-amplified tumors through RhoA/ROCK/GSK3β signaling. Targeting ARHGEF12 with the small molecular inhibitor Y16 induced cell differentiation and attenuated neuroblastoma tumorigenicity.
Conclusion
Our findings provide new insight into the mechanism by which ARHGEF12 regulates neuroblastoma tumorigenicity and suggest a translatable therapeutic approach by targeting ARHGEF12 with a small molecular inhibitor.
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Data availability
All relevant data and material are available from the corresponding author upon reasonable request.
Code availability
Not applicable.
Change history
09 October 2023
The original version of this article was revised: In Fig. 5f of this article the representative MYCN IHC images of tumor from vehicle-treated mice presented the wrong samples. Fig. 5f has been corrected in the original article. The authors declare that this correction does not affect the description, interpretation, or the original conclusions of the manuscript.
16 October 2023
A Correction to this paper has been published: https://doi.org/10.1007/s13402-023-00890-x
Abbreviations
- GEFs:
-
Guanine nucleotide exchange factors
- NB:
-
Neuroblastoma
- GNB:
-
Ganglioneuroblastoma
- RA:
-
Retinoic acid
- ARHGEF12:
-
Rho guanine nucleotide exchange factor 12
- DMEM:
-
Dulbecco's modified Eagle medium
- FBS:
-
Fetal bovine serum
- PBS:
-
Phosphate-buffered saline
- PI:
-
Propidium Iodide
- PE:
-
Phycoerythrin
- CHX:
-
Cycloheximide
- ARHGEF12 KD:
-
ARHGEF12 knockdown
- H&E:
-
Hematoxylin-eosin
- co-IP:
-
co-immunoprecipitation
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Funding
This work was supported in part by the National Key R&D Program of China (2018YFC1313000/2018YFC1313005) to Y.G. and Y. L; the National Natural Science Foundation of China (81972341 and 32271007) to Y.L.; the Shanghai Municipal Commission of Science and Technology (201409002700 to Y. L., 17411950400 to J. T.); Program of Shanghai Academic/Technology Research Leader (21XD1403100) to H.F.; the Shanghai Jiao Tong University Medical Engineering Cross Fund (No. YG2017MS32); and the Pudong New Area Science & Technology Development Fund (PKJ2018-Y47) to Y. L.; the State Key Laboratory of Oncogenes and Related Genes (KF2115) to F.L.
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Y.L., H.F., S.S. and J.G. designed the experiments. Y.Y., S.W., J.C., J.L. and F.L. performed the experiments. Y.Y., S.W., J.C., Y.W.Z., Y.Y.X. and J.Y.T. analyzed and interpreted the data. Y.Y., Y.L. and H.F. wrote the paper. Y.L. supervised the project.
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The original version of this article was revised: In Fig. 5f of this article the representative MYCN IHC images of tumor from vehicle-treated mice presented the wrong samples. Fig. 5f has been corrected in the original article. The authors declare that this correction does not affect the description, interpretation, or the original conclusions of the manuscript.
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Yang, Y., Wang, S., Cai, J. et al. Targeting ARHGEF12 promotes neuroblastoma differentiation, MYCN degradation, and reduces tumorigenicity. Cell Oncol. 46, 133–143 (2023). https://doi.org/10.1007/s13402-022-00739-9
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DOI: https://doi.org/10.1007/s13402-022-00739-9