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http://dx.doi.org/10.3340/jkns.2019.0255

Survival Association and Cell Cycle Effects of B7H3 in Neuroblastoma  

Zhang, Haibo (Department of Neurosurgery, Huashan Hospital, Fudan University)
Zhang, Jinsen (Department of Neurosurgery, Huashan Hospital, Fudan University)
Li, Chunjie (Institutes of Biomedical Sciences, Fudan University)
Xu, Hao (Department of Neurosurgery, Huashan Hospital, Fudan University)
Dong, Rui (Department of Pediatric Surgery, Children's Hospital of Fudan University)
Chen, Clark C. (Department of Neurosurgery, University of Minnesota)
Hua, Wei (Department of Neurosurgery, Huashan Hospital, Fudan University)
Publication Information
Journal of Korean Neurosurgical Society / v.63, no.6, 2020 , pp. 707-716 More about this Journal
Abstract
Objective : The function of B7H3, a member of the B7 family of proteins, in neuroblastoma (NB) remains poorly characterized. Here we examine the expression pattern of B7H3 in clinical NB specimens and characterize the phenotype of B7H3 knock-down in NB cell line. Methods : Immunohistochemical (IHC) staining was carried out to assess the expression of B7H3 in clinical NB specimens. Survival association was analyzed using five Gene Expression Omnibus (GEO) datasets (GSE85047, GSE45480, GSE62564, GSE16476, GSE49710). Clonogenic survival and flow cytometry were performed after B7H3 knockdown to assess the cellular proliferation and cell survival in vitro. Impact of B7H3 silencing on NB growth was examined in vivo using the SH-SY5Y xenograft model. Results : On IHC staining, B7H3 was widely expressed in clinical NB specimens. Analysis of the transcriptional profiles of five GEO datasets clinically annotated NB specimens revealed that decreased B7H3 expression was associated with improved overall survival. B7H3 knockdown suppressed the proliferation of the SH-SY5Y NB model in vitro and in vivo. Cell cycle analysis revealed that B7H3 silencing induced G1/S arrest. This arrest was associated with the suppression of E2F1 expression and induction of Rb expression. Conclusion : Our results demonstrate that B7H3 expression correlate with clinical survival in NB patients. Preliminary studies suggest that B7H3 may mediate the G1/S transition.
Keywords
Neuroblastoma; B7H3; Proliferation; Prognosis; Cell cycle;
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