RESUMO
Objective:To analyze the expression of endoplasmic reticulum lipid raft-associated protein 2 (ERLIN2) in glioblastoma tissues, and to analyze its correlation with the clinicopathological features and prognosis of patients with glioblastoma.Methods:The TCGA database was used to analyze the expression level of ERLIN2 mRNA in glioblastoma. KM-plotter was used to analyze the correlation between ERLIN2 expression and prognosis in patients with glioblastoma. The expression level of ERLIN2 protein in 78 cases of glioblastoma tissue was determined by immunohistochemical staining, and then the tissue samples were divided into high expression and low expression groups according to the ERLIN2 expression level. The clinical and pathological data of patients were collected, including age, gender, tumor laterality, recurrence, isocitrate dehydrogenase(IDH) mutation, and the correlation between ERLIN2 protein and clinicopathological characteristics was further analyzed.Results:The mRNA of ERLIN2 was significantly overexpressed in glioblastoma, and the overall survival rate of patients with high ERLIN2 expression was low, suggesting a poor prognosis. The results of immunohistochemistry and clinicopathological analysis showed that ERLIN2 protein was significantly overexpressed in glioblastoma, and its expression level was significantly related to tumor recurrence.Conclusions:ERLIN2 protein is significantly overexpressed in glioblastoma tissues, and its expression level is related to the clinicopathological characteristics and poor prognosis, suggesting that ERLIN2 can be used as a potential prognostic factor for glioblastoma.
RESUMO
The osteogenic in vitro effect of low intensity pulsed ultrasound (LIPUS) on SD rat adipose-derived stem cells (ADSCs) was investigated. Rat ADSCs underwent LIPUS (intensity=100 mW/cm(2)) or sham exposure for 8 min per treatment once everyday in vitro, and then the alkaline phosphatase (ALP) activity and mineralized nodule formation were assessed to evaluate the osteogenic effect of LIPUS on ADSCs. To further explore the underlying mechanism, the osteogenic-related gene mRNA expression was determined by using reverse transcriptase-polymerase chain reaction (RT-PCR) at 1st, 3rd, 5th, 7th day after exposure repectively. Westen blot was used to evaluate the protein expression levels of two osteogenic differentiation associated genes at 7th and 14th day repectively. It was found that ALP activity was increased after LIPUS exposure and LIPUS resulted in mineralized nodule formation of ADSCs in vitro. LIPUS-treated ADSCs displayed higher mRNA expression levels of runt-related transcription factor 2 (Runx2), osteocalcin (OCN), ALP and bone sialoprotein (BSP) genes than controls, and the protein levels of Runx2 and BSP were also increased. The results suggested that LIPUS may induce the osteogenic differentiation of ADSCs in vitro.