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dc.contributor.authorVisa Pretel, Anna
dc.contributor.authorCrespí Sallán, Marta
dc.contributor.authorMaiques Carlos, Oscar
dc.contributor.authorAlza, Lía
dc.contributor.authorTalavera, Elisabeth
dc.contributor.authorLópez-Ortega, Ricard
dc.contributor.authorSantacana Espasa, Maria
dc.contributor.authorHerreros Danés, Judit
dc.contributor.authorCantí Nicolás, Carles
dc.date.accessioned2019-02-27T07:58:47Z
dc.date.available2020-02-12T23:18:25Z
dc.date.issued2019
dc.identifier.issn0008-5472
dc.identifier.urihttp://hdl.handle.net/10459.1/65789
dc.description.abstractT-type Ca2+ channels (TTCC) have been identified as key regulators of cancer cell cycle and survival. In vivo studies in glioblastoma (GBM) murine xenografts have shown that drugs able to block TTCC in vitro (such as tetralol derivatives mibefradil/NNC-55-096, or different 3,4-dihydroquinazolines) slow tumor progression. However, currently available TTCC pharmacological blockers have limited selectivity for TTCC, and are unable to distinguish between TTCC isoforms. Here we analyzed the expression of TTCC transcripts in human GBM cells and show a prevalence of Cav3.1 mRNAs. Infection of GBM cells with lentiviral particles carrying shRNA against Cav3.1 resulted in GBM cell death by apoptosis. We generated a murine GBM xenograft via subcutaneous injection of U87-MG GBM cells and found that tumor size was reduced when Cav3.1 expression was silenced. Furthermore, we developed an in vitro model of temozolomide-resistant GBM that showed increased expression of Cav3.1 accompanied by activation of macroautophagy. We confirmed a positive correlation between Cav3.1 and autophagic markers in both GBM cultures and biopsies. Of note, Cav3.1 knockdown resulted in transcriptional downregulation of p62/SQSTM1 and deficient autophagy. Together, these data identify Cav3.1 channels as potential targets for slowing GBM progression and recurrence based on their role in regulating autophagy.
dc.description.sponsorshipPaired biopsies of primary and recurrent GBMs were obtained through Biobank Networkfrom Carlos III Health Institute (NavarraBiomed, Toledo and Basque Biobanks). This work was funded by Instituto de Salud Carlos III/FEDER (“Una manera de hacer Europa”; PI13/01980 to JH). Work supported by IRBLleida Biobank (B.0000682) and PLATAFORMA BIOBANCOS PT17/0015/0027/. MCS and AV held predoctoral fellowships from University of Lleida (UdL).
dc.format.mimetypeapplication/pdf
dc.language.isoeng
dc.publisherAmerican Association for Cancer Research
dc.relation.isformatofVersió postprint del document publicat a: https://doi.org/10.1158/0008-5472.CAN-18-1924
dc.relation.ispartofCancer Research, 2019, vol. 79, núm. 8, p. 1857-1868
dc.rights(c) American Association for Cancer Research, 2019
dc.subjectVoltage-gated calcium channels
dc.subjectAutophagy
dc.subjectTemozolomide
dc.subjectGlioblastoma
dc.subject.classificationGlioblastoma multiforme
dc.titleT-type Cav3.1 channels mediate progression and chemotherapeutic resistance in glioblastoma
dc.typeinfo:eu-repo/semantics/article
dc.date.updated2019-02-27T07:58:48Z
dc.identifier.idgrec028331
dc.type.versioninfo:eu-repo/semantics/acceptedVersion
dc.rights.accessRightsinfo:eu-repo/semantics/openAccess
dc.identifier.doihttps://doi.org/10.1158/0008-5472.CAN-18-1924


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