Publications by authors named "Xianrui Yuan"

Objective: To investigate the relationship between postoperative hypothalamo-hypophyseal injury (HHI) and postoperative water and sodium disturbances in patients with craniopharyngioma.

Methods: The medical records, radiological data, and laboratory results of 178 patients (44 children and 134 adults) who underwent microsurgery for craniopharyngioma in a single center were reviewed. Postoperative HHI was assessed using magnetic resonance imaging.

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Background: The regulatory roles of long non-coding RNA (lncRNA) CRNDE in temozolomide (TMZ) chemoresistance to glioblastoma multiforme (GBM) are still poorly understood. Therefore, the function, characteristics, and possible mechanism of CRNDE in TMZ-induced chemoresistance to GBM were explored.

Methods: Firstly, the expression level of CRNDE in 58 cases of glioma tissue specimens and 30 cases of normal brain tissues were tested by qRT-PCR.

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Following the publication of this paper, it was drawn to the Editors' attention by a concerned reader that certain of the scratch-wound assay data shown in Fig. 3A and Transwell cell migration data shown in Figs. 3B and 6B were strikingly similar to data appearing in different form in other articles by different authors.

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Background: Medulloblastoma (MB) is the most common malignant pediatric brain tumor that originates in the cerebellum and brainstem. Frequent somatic mutations and deregulated expression of epigenetic regulators in MB highlight the substantial role of epigenetic alterations. 5-hydroxymethylcytosine (5hmC) is a highly abundant cytosine modification in the developing cerebellum and is regulated by ten-eleven translocation (TET) enzymes.

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Background: Management of tentorial notch meningiomas (TNM) remains a challenge for neurosurgeons. We demonstrate the clinical characteristics and surgical experiences of TNM based on our cases according to a proposed further classification.

Methods: We retrospectively analyzed clinical and follow-up data in a consecutive series of 53 TNM patients who underwent microsurgical operation from 2011 to 2019 in our institution.

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Petroclival meningiomas (PCMs) are regarded as one of the most formidable challenges in neurosurgery. We retrospectively assessed the surgical outcomes of PCMs based on a tumor classification to evaluate the long-term outcomes. A series of 168 patients with PCMs from July 1996 to January 2017.

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Importance: Chronic subdural hematoma (CSDH) is a trauma-associated condition commonly found in elderly patients. Surgery is currently the treatment of choice, but it carries a significant risk of recurrence and death. Nonsurgical treatments remain limited and ineffective.

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Background: High-grade gliomas (HGGs) exhibit marked heterogeneity in clinical behavior. The purpose of this study was to identify a novel biomarker that predicts patient outcome, which is helpful in HGG patient management.

Methods: We analyzed gene expression profiles of 833 HGG cases, representing the largest patient population ever reported.

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Temozolomide (TMZ) is one of the most commonly used drugs for the clinical treatment of glioblastomas. However, it has been reported that treatment with TMZ can induce autophagy, which leads to tumor resistance and increases the survival of tumor cells. MicroRNA-30a (miR-30a) has been found to have inhibitory effects on autophagy by directly targeting beclin 1.

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Genomic studies have established a set of three core-signaling pathways, receptor tyrosine kinase (RTK), p53 and retinoblastoma (Rb) signaling pathways, contributing glioblastoma (GBM) and revealed that dysregulation of at least two pathways is required for GBM progression. In the present study, we investigate efficacy of combination of palbociclib, cyclin-dependent kinase 4/6 (CDK4/6) inhibitor, and erlotinib, epidermal growth factor receptor (EGFR) inhibitor in GBM cell systems with different p53 status. Cell proliferation and colony formation assays showed that the combination treatment synergistically suppressed GBM cell proliferation.

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In certain surgical procedures, sacrificing the superior petrosal vein (SPV) is required. Previous studies have reported transient cerebellar edema, venous infarction, or hemorrhage that might occur after sectioning of the SPV. The present study investigated the pathophysiological changes in cerebellum and brain stem after SPV sacrifice.

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Purpose: AHNAK is originally identified as a giant protein based on the estimated size of approximately 700 kDa. The aim of this study is to identify the role of AHNAK in the pathogenesis of glioma.

Methods: We tested AHNAK mRNA level in a panel of six human glioma cell lines, and in 30 cases of normal brain tissues and 73 cases of glioma tissue samples using a qRT-PCR method.

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Surgery is the primary treatment of choice for all symptomatic pituitary adenomas except prolactinomas. Common postoperative complications include endocrinopathies, vision impairment and cerebrospinal fluid leak. The present study assessed 153 continuous microscopic surgeries for pituitary adenomas performed by an author of the present study between 2010 to 2014.

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Valproic acid (VPA), a drug widely used to treat manic disorder and epilepsy, has recently shown neuroprotective effects in several neurological diseases, particularly in Parkinson's disease (PD). The goal of the present study was to confirm VPA's dose-dependent neuroprotective propensities in the MPP model of PD in primary dopamine (DA) neurons and to investigate the underlying molecular mechanisms using specific mitogen-activated protein kinases (MAPKs) and phosphatidylinositol 3-kinase- (PI3K-) Akt signaling inhibitors. VPA reversed MPP-induced mitochondrial apoptosis and counteracted MPP-induced extracellular signal-regulated kinase (ERK) and Akt repression and inhibited glycogen synthase kinase 3 (GSK3) activation through induction of GSK3 phosphorylation.

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Objectives: To compare and analyze the differences in clinical manifestations and surgical outcomes after gross total resection (GTR) for vestibular schwannoma between elderly and younger patients.

Methods: We conducted a retrospective study of 40 elderly (≥65 years) and 40 younger (<65 years) patients, and matched operation dates and tumor size in the 2 groups were matched. All 80 patients underwent microsurgical resection though the sigmoid approach, by the same surgeon (X.

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Background: Solitary fibrous tumors (SFTs) are rare mesenchymal tumors that occasionally occur in the central nervous system (CNS). It is difficult to fully understand their clinical characteristics, partly due to a limited number of reported cases.

Methods: We reviewed 24 patients admitted to our institution between 2009 and 2016 with CNS solitary fibrous tumors.

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In this article we inspect the roles and functions of the methyl-CpG-binding domain protein 3 (MBD3) in human malignant glioma, to assess its potential as an epigenetic biomarker for prognosis. The regulatory effects of MBD3 on glioma transcriptome were first profiled by high-throughput microarray. Our results indicate that MBD3 is involved in both transcriptional activation and repression.

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To explore the influence of preventive use of vasopressin tannate on diabetes insipidus and serum sodium at the early postoperation of craniopharyngioma.
 Methods: The data of 83 patients, who underwent unilateral sub-frontal approach resection of craniopharyngioma between 2010 and 2014 by the same senior neurosurgeon, were retrospectively analyzed. The patients were divided into a vasopressin tannate group (used group) and a control group.

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Background: Valproic acid (VPA), an established antiepileptic drug, was assessed for antitumor activity, including its effects on glioblastoma, but its role has not been determined.

Methods: In the present study, we investigated VPA-induced apoptosis effects on human U87 cells by cell viability, lactate dehydrogenase (LDH) release, TUNEL/Hoechst staining and flow cytometric in vitro, then we further explored the underlying molecular mechanisms using the selective antagonists PD98059, LY294002 and SB216763.

Results: The data showed that VPA dose-dependent induction of glioma U87 cells to undergo apoptosis through the mitochondria-dependent pathway in vitro.

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Objective: To investigate the indications of the pretemporal transcavernous approach for cavernous sinus tumors resection and design individually tailored surgery according to the extent of tumors and operation requirements.

Methods: A retrospective analysis of clinical data, surgical outcomes and complications in a series of 31 cases with cavernous sinus tumor operated via the individually tailored pretemporal transcavernous approach between May 2012 and September 2015 in Department of Neurosurgery, Xiangya Hospital, Central South University. There were 13 male and 18 female patients, aging from 17 to 67 years with a mean of (41±14) years.

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Objective: To evaluate the outcomes of 177 cases of craniopharyngioma (CP) treated via a unilateral subfrontal approach.

Methods: A total of 177 continuous microscopic surgeries were performed by the senior author (Y.X.

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Introduction: Ectopic recurrent craniopharyngioma is rare. We reported two pediatric cases and reviewed the related literature.

Method: We retrospectively studied 177 craniopharyngioma cases treated by the senior author (Yuan X) between years 2003 and 2013.

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