ABSTRACT
BACKGROUND/AIMS: Long noncoding RNAs (lncRNAs) have recently emerged as novel and potentially promising therapeutic targets in various cancers. However, the expression pattern and biological function of lncRNAs in glioma remain largely elusive. In the present study, we investigated the functional role of an lncRNA, small nucleolar RNA host gene 16 (SNHG16), in glioma. METHODS: The expression levels of SNHG16 and miR-4518 were measured using qRT-PCR. The relationship between the levels of SNHG16 and clinicopathologic features were statically analyzed. The levels of proteins were detected using western blot. Bioinformatics analysis and luciferase reporter assays were applied to the analysis of the relationship between SNHG16, miR-4518 and PRMT5. Cell viability and apoptosis were measured using MTT and apoptosis ELISA assay, respectively. RESULTS: SNHG16 was highly expressed in glioma tissues and cell lines, which was related to poorer clinicopathologic features and shorter survival time. Knockdown of SNHG16 inhibits the viability and induces apoptosis of glioma cells. Further investigation revealed that SNHG16 could up-regulate the expression of miR-4518 targeted gene PRMT5 via acting as an endogenous sponge of miR-4518. Moreover, SNHG16 also affects the expression of Bcl-2 family proteins and the activation of PI3K/Akt signaling pathway. CONCLUSION: Our study revealed a novel SNHG16-miR-4518-PRMT5 pathway regulatory axis in glioma pathogenesis. SNHG16 could be used as a potential therapeutic target in the treatment of glioma.
Subject(s)
Brain Neoplasms/pathology , Glioma/pathology , MicroRNAs/metabolism , Protein-Arginine N-Methyltransferases/metabolism , RNA, Long Noncoding/metabolism , 3' Untranslated Regions , Aged , Antagomirs/metabolism , Apoptosis , Base Sequence , Brain Neoplasms/genetics , Brain Neoplasms/mortality , Cell Line, Tumor , Cell Proliferation , Disease-Free Survival , Female , Glioma/genetics , Glioma/mortality , Humans , Kaplan-Meier Estimate , Male , MicroRNAs/antagonists & inhibitors , MicroRNAs/genetics , Middle Aged , Phosphatidylinositol 3-Kinases/metabolism , Protein-Arginine N-Methyltransferases/antagonists & inhibitors , Protein-Arginine N-Methyltransferases/genetics , Proto-Oncogene Proteins c-akt/metabolism , Proto-Oncogene Proteins c-bcl-2/metabolism , RNA Interference , RNA, Long Noncoding/antagonists & inhibitors , RNA, Long Noncoding/genetics , RNA, Small Interfering/metabolism , Sequence Alignment , Signal Transduction , Up-RegulationABSTRACT
In this study, we reported one female patient diagnosed with severe hydrocephalus who presented with benign paroxysmal positional vertigo (BPPV). She presented with progressive headache and dizziness prior to hospitalization as chief complaints. She received Diagnostic Dix-Hallpike and Roll tests to make a definite diagnosis. The patient was cured after Gufoni maneuver and did not recur after 6-month follow-up. The diagnostic procedures of this female case prompted that prior to formal treatment, patients developing severe hydrocephalus complicated with BPPV should receive provocative test for positional dizziness, performed by experienced physicians from the Department of neurology and otolaryngology.
