Jun Li, Junfeng Ma, Shan Huang, Jun Li, Liang Zhou, Jiahua Sun, Lin Chen
{"title":"CircTTLL13 通过调节 OLR1 介导的 Wnt/β-Catenin 通路激活促进胶质瘤的 TMZ 抗性","authors":"Jun Li, Junfeng Ma, Shan Huang, Jun Li, Liang Zhou, Jiahua Sun, Lin Chen","doi":"10.1080/10985549.2023.2210032","DOIUrl":null,"url":null,"abstract":"<p><p>Glioma, originating from neuroglial progenitor cells, is a type of intrinsic brain tumor with poor prognosis. temozolomide (TMZ) is the first-line chemotherapeutic agent for glioma. Exploring the mechanisms of circ<i>TTLL13</i> underlying TMZ resistance in glioma is of great significance to improve glioma treatment. Bioinformatics was adopted to identify target genes. The circular structure of circ<i>TTLL13</i> and its high expression in glioma cells were disclosed by quantitative real time-PCR (qRT-PCR) and PCR-agarose gel electrophoresis. Functional experiments proved that oxidized LDL receptor 1 (<i>OLR1</i>) promotes TMZ resistance of glioma cells. Circ<i>TTLL13</i> enhances TMZ resistance of glioma cells via modulating <i>OLR1</i>. Luciferase reporter, RNA-binding protein immunoprecipitation (RIP), RNA pulldown, mRNA stability, N6-methyladenosine (m<sup>6</sup>A) dot blot and RNA total m<sup>6</sup>A quantification assays were implemented, indicating that circ<i>TTLL13</i> stabilizes <i>OLR1</i> mRNA via recruiting YTH N6-methyladenosine RNA binding protein 1 (<i>YTHDF1</i>) and promotes m<sup>6</sup>A methylation of <i>OLR1</i> pre-mRNA through recruiting methyltransferase-like 3 (<i>METTL3</i>). TOP/FOP-flash reporter assay and western blot verified that circ<i>TTLL13</i> activates Wnt/β-catenin signaling pathway by regulating <i>OLR1</i>. Circ<i>TTLL13</i> promotes TMZ resistance in glioma through regulating <i>OLR1</i>-mediated Wnt/β-catenin pathway activation. This study offers an insight into the efficacy improvement of TMZ for glioma treatment.</p>","PeriodicalId":3,"journal":{"name":"ACS Applied Electronic Materials","volume":null,"pages":null},"PeriodicalIF":4.3000,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10348032/pdf/","citationCount":"0","resultStr":"{\"title\":\"Circ<i>TTLL13</i> Promotes TMZ Resistance in Glioma via Modulating <i>OLR1</i>-Mediated Activation of the Wnt/β-Catenin Pathway.\",\"authors\":\"Jun Li, Junfeng Ma, Shan Huang, Jun Li, Liang Zhou, Jiahua Sun, Lin Chen\",\"doi\":\"10.1080/10985549.2023.2210032\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p><p>Glioma, originating from neuroglial progenitor cells, is a type of intrinsic brain tumor with poor prognosis. temozolomide (TMZ) is the first-line chemotherapeutic agent for glioma. Exploring the mechanisms of circ<i>TTLL13</i> underlying TMZ resistance in glioma is of great significance to improve glioma treatment. Bioinformatics was adopted to identify target genes. The circular structure of circ<i>TTLL13</i> and its high expression in glioma cells were disclosed by quantitative real time-PCR (qRT-PCR) and PCR-agarose gel electrophoresis. Functional experiments proved that oxidized LDL receptor 1 (<i>OLR1</i>) promotes TMZ resistance of glioma cells. Circ<i>TTLL13</i> enhances TMZ resistance of glioma cells via modulating <i>OLR1</i>. Luciferase reporter, RNA-binding protein immunoprecipitation (RIP), RNA pulldown, mRNA stability, N6-methyladenosine (m<sup>6</sup>A) dot blot and RNA total m<sup>6</sup>A quantification assays were implemented, indicating that circ<i>TTLL13</i> stabilizes <i>OLR1</i> mRNA via recruiting YTH N6-methyladenosine RNA binding protein 1 (<i>YTHDF1</i>) and promotes m<sup>6</sup>A methylation of <i>OLR1</i> pre-mRNA through recruiting methyltransferase-like 3 (<i>METTL3</i>). TOP/FOP-flash reporter assay and western blot verified that circ<i>TTLL13</i> activates Wnt/β-catenin signaling pathway by regulating <i>OLR1</i>. Circ<i>TTLL13</i> promotes TMZ resistance in glioma through regulating <i>OLR1</i>-mediated Wnt/β-catenin pathway activation. This study offers an insight into the efficacy improvement of TMZ for glioma treatment.</p>\",\"PeriodicalId\":3,\"journal\":{\"name\":\"ACS Applied Electronic Materials\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":4.3000,\"publicationDate\":\"2023-01-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10348032/pdf/\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"ACS Applied Electronic Materials\",\"FirstCategoryId\":\"99\",\"ListUrlMain\":\"https://doi.org/10.1080/10985549.2023.2210032\",\"RegionNum\":3,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"2023/7/10 0:00:00\",\"PubModel\":\"Epub\",\"JCR\":\"Q1\",\"JCRName\":\"ENGINEERING, ELECTRICAL & ELECTRONIC\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"ACS Applied Electronic Materials","FirstCategoryId":"99","ListUrlMain":"https://doi.org/10.1080/10985549.2023.2210032","RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2023/7/10 0:00:00","PubModel":"Epub","JCR":"Q1","JCRName":"ENGINEERING, ELECTRICAL & ELECTRONIC","Score":null,"Total":0}
CircTTLL13 Promotes TMZ Resistance in Glioma via Modulating OLR1-Mediated Activation of the Wnt/β-Catenin Pathway.
Glioma, originating from neuroglial progenitor cells, is a type of intrinsic brain tumor with poor prognosis. temozolomide (TMZ) is the first-line chemotherapeutic agent for glioma. Exploring the mechanisms of circTTLL13 underlying TMZ resistance in glioma is of great significance to improve glioma treatment. Bioinformatics was adopted to identify target genes. The circular structure of circTTLL13 and its high expression in glioma cells were disclosed by quantitative real time-PCR (qRT-PCR) and PCR-agarose gel electrophoresis. Functional experiments proved that oxidized LDL receptor 1 (OLR1) promotes TMZ resistance of glioma cells. CircTTLL13 enhances TMZ resistance of glioma cells via modulating OLR1. Luciferase reporter, RNA-binding protein immunoprecipitation (RIP), RNA pulldown, mRNA stability, N6-methyladenosine (m6A) dot blot and RNA total m6A quantification assays were implemented, indicating that circTTLL13 stabilizes OLR1 mRNA via recruiting YTH N6-methyladenosine RNA binding protein 1 (YTHDF1) and promotes m6A methylation of OLR1 pre-mRNA through recruiting methyltransferase-like 3 (METTL3). TOP/FOP-flash reporter assay and western blot verified that circTTLL13 activates Wnt/β-catenin signaling pathway by regulating OLR1. CircTTLL13 promotes TMZ resistance in glioma through regulating OLR1-mediated Wnt/β-catenin pathway activation. This study offers an insight into the efficacy improvement of TMZ for glioma treatment.
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