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  • American Association for Cancer Research (AACR)  (68)
  • 1
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    Online Resource
    IL2 Inducible T-cell Kinase, a Novel Therapeutic Target in Melanoma
    American Association for Cancer Research (AACR) ; 2015
    In:  Clinical Cancer Research Vol. 21, No. 9 ( 2015-05-01), p. 2167-2176
    Details
    In: Clinical Cancer Research, American Association for Cancer Research (AACR), Vol. 21, No. 9 ( 2015-05-01), p. 2167-2176
    Abstract: Purpose: IL2 inducible T-cell kinase (ITK) promoter CpG sites are hypomethylated in melanomas compared with nevi. The expression of ITK in melanomas, however, has not been established and requires elucidation. Experimental Design: An ITK-specific monoclonal antibody was used to probe sections from deidentified, formalin-fixed paraffin-embedded tumor blocks or cell line arrays and ITK was visualized by IHC. Levels of ITK protein differed among melanoma cell lines and representative lines were transduced with four different lentiviral constructs that each contained an shRNA designed to knockdown ITK mRNA levels. The effects of the selective ITK inhibitor BI 10N on cell lines and mouse models were also determined. Results: ITK protein expression increased with nevus to metastatic melanoma progression. In melanoma cell lines, genetic or pharmacologic inhibition of ITK decreased proliferation and migration and increased the percentage of cells in the G0–G1 phase. Treatment of melanoma-bearing mice with BI 10N reduced growth of ITK-expressing xenografts or established autochthonous (Tyr-Cre/Ptennull/BrafV600E) melanomas. Conclusions: We conclude that ITK, formerly considered an immune cell–specific protein, is aberrantly expressed in melanoma and promotes tumor development and progression. Our finding that ITK is aberrantly expressed in most metastatic melanomas suggests that inhibitors of ITK may be efficacious for melanoma treatment. The efficacy of a small-molecule ITK inhibitor in the Tyr-Cre/Ptennull/BrafV600E mouse melanoma model supports this possibility. Clin Cancer Res; 21(9); 2167–76. ©2015 AACR.
    Type of Medium: Online Resource
    ISSN: 1078-0432 , 1557-3265
    URL: Article
    DOI: 10.1158/1078-0432.CCR-14-1826
    RVK:
    XA 36791
    Language: English
    Publisher: American Association for Cancer Research (AACR)
    Publication Date: 2015
    detail.hit.zdb_id: 1225457-5
    detail.hit.zdb_id: 2036787-9
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  • 2
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    Molecular Ontogeny of Donor-Derived Follicular Lymphomas Occurring after Hematopoietic Cell Transplantation
    American Association for Cancer Research (AACR) ; 2012
    In:  Cancer Discovery Vol. 2, No. 1 ( 2012-01-01), p. 47-55
    Details
    In: Cancer Discovery, American Association for Cancer Research (AACR), Vol. 2, No. 1 ( 2012-01-01), p. 47-55
    Abstract: The relative timing of genetic alterations that contribute to follicular lymphoma remains unknown. We analyzed a donor–recipient pair who both developed grade 2/3A follicular lymphoma 7 years after allogeneic transplantation and donor lymphocyte infusions. Both patients harbored identical BCL2/IGH rearrangements also present in 1 in 2,000 cells in the donor lymphocyte infusion, and the same V(D)J rearrangement, which underwent somatic hypermutation both before and after clonal divergence. Exome sequencing of both follicular lymphomas identified 15 shared mutations, of which 14 (including alterations in EP300 and KLHL6) were recovered from the donor lymphocyte infusion by ultra-deep sequencing (average read coverage, 361,723), indicating acquisition at least 7 years before clinical presentation. Six additional mutations were present in only one follicular lymphoma and not the donor lymphocyte infusion, including an ARID1A premature stop, indicating later acquisition during clonal divergence. Thus, ultrasensitive sequencing can map clonal evolution within rare subpopulations during human lymphomagenesis in vivo. Significance: For the first time, we define the molecular ontogeny of follicular lymphoma during clonal evolution in vivo. By using ultrasensitive mutation detection, we mapped the time-course of somatic alterations after passage of a malignant ancestor by hematopoietic cell transplantation. Cancer Discovery; 2(1); 47–55. ©2011 AACR. This article is highlighted in the In This Issue feature, p. 1
    Type of Medium: Online Resource
    ISSN: 2159-8274 , 2159-8290
    URL: Article
    DOI: 10.1158/2159-8290.CD-11-0208
    Language: English
    Publisher: American Association for Cancer Research (AACR)
    Publication Date: 2012
    detail.hit.zdb_id: 2607892-2
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  • 3
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    A Phase I/II Study of Neoadjuvant Cisplatin, Docetaxel, and Nintedanib for Resectable Non–Small Cell Lung Cancer
    American Association for Cancer Research (AACR) ; 2020
    In:  Clinical Cancer Research Vol. 26, No. 14 ( 2020-07-15), p. 3525-3536
    Details
    In: Clinical Cancer Research, American Association for Cancer Research (AACR), Vol. 26, No. 14 ( 2020-07-15), p. 3525-3536
    Abstract: Nintedanib enhances the activity of chemotherapy in metastatic non–small cell lung cancer (NSCLC). In this phase I/II study, we assessed safety and efficacy of nintedanib plus neoadjuvant chemotherapy, using major pathologic response (MPR) as primary endpoint. Patients and Methods: Eligible patients had stage IB (≥4 cm)–IIIA resectable NSCLC. A safety run-in phase was followed by an expansion phase with nintedanib 200 mg orally twice a day (28 days), followed by three cycles of cisplatin (75 mg/m2), docetaxel (75 mg/m2) every 21 days plus nintedanib, followed by surgery. With 33 planned patients, the study had 90% power to detect an MPR increase from 15% to 35%. Results: Twenty-one patients (stages I/II/III, N = 1/8/12) were treated. One of 15 patients treated with nintedanib 200 mg achieved MPR [7%, 95% confidence interval (CI), 0.2%–32%]. Best ORR in 20 evaluable patients was 30% (6/20, 95% CI, 12%–54%). Twelve-month recurrence-free survival and overall survival were 66% (95% CI, 47%–93%) and 91% (95% CI, 79%–100%), respectively. Most frequent treatment-related grade 3–4 toxicities were transaminitis and electrolyte abnormalities. On the basis of an interim analysis the study was discontinued for futility. Higher levels of CD3+ and cytotoxic CD3+CD8+ T cells were found in treated tumors of patients who were alive than in those who died (652.8 vs. 213.4 cells/mm2, P = 0.048; 142.3 vs. 35.6 cells/mm2, P = 0.018). Conclusions: Although tolerated, neoadjuvant nintedanib plus chemotherapy did not increase MPR rate compared with chemotherapy historical controls. Additional studies of the combination in this setting are not recommended. Posttreatment levels of tumor-infiltrating T cells were associated with patient survival. Use of MPR facilitates the rapid evaluation of neoadjuvant therapies. See related commentary by Blakely and McCoach, p. 3499
    Type of Medium: Online Resource
    ISSN: 1078-0432 , 1557-3265
    URL: Article
    DOI: 10.1158/1078-0432.CCR-19-4180
    RVK:
    XA 36791
    Language: English
    Publisher: American Association for Cancer Research (AACR)
    Publication Date: 2020
    detail.hit.zdb_id: 1225457-5
    detail.hit.zdb_id: 2036787-9
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  • 4
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    Activity of Crizotinib in Patients with ALK-Aberrant Relapsed/Refractory Neuroblastoma: A Children's Oncology Group Study (ADVL0912)
    American Association for Cancer Research (AACR) ; 2021
    In:  Clinical Cancer Research Vol. 27, No. 13 ( 2021-07-01), p. 3543-3548
    Details
    In: Clinical Cancer Research, American Association for Cancer Research (AACR), Vol. 27, No. 13 ( 2021-07-01), p. 3543-3548
    Abstract: Anaplastic lymphoma kinase (ALK) aberrations are a promising target for patients with neuroblastoma. We assessed the activity of first-generation ALK inhibitor crizotinib in patients with no known curative treatments and whose tumors harbored an activating ALK alteration. Patients and Methods: Twenty patients with relapsed/refractory ALK-positive neuroblastoma received crizotinib at the recommended phase II dose of 280 mg/m2/dose. A Simon two-stage design was used to evaluate the antitumor activity of crizotinib monotherapy. Response evaluation occurred after cycles 1, 3, 5, 7, and then every 3 cycles. Correlation of ALK status and response was a secondary aim of the study. Results: The objective response rate for patients with neuroblastoma was 15% [95% confidence interval (CI): 3.3%–34.3%]: two with partial responses and 1 with a complete response. All three patients had a somatic ALK Arg1275Gln mutation, the most common ALK hotspot mutation observed in neuroblastoma and the only mutation predicted to be sensitive to ALK inhibition with crizotinib. Two patients had prolonged stable disease (10 and 13 cycles, respectively); both harbored an ALK Arg1275Gln mutation. Three patients with ALK Phe1174Leu mutations progressed during cycle 1 of therapy, and one patient with an ALK Phe1174Val received three cycles before disease progression. The two patients with ALK amplification had no response. The most common adverse event was a decrease in neutrophil count. Conclusions: Despite limited activity seen in this trial, we conclude that this is more likely due to an inability to reach the higher concentrations of crizotinib needed to overcome the competing ATP affinity. See related commentary by Schulte and Eggert, p. 3507
    Type of Medium: Online Resource
    ISSN: 1078-0432 , 1557-3265
    URL: Article
    DOI: 10.1158/1078-0432.CCR-20-4224
    RVK:
    XA 36791
    Language: English
    Publisher: American Association for Cancer Research (AACR)
    Publication Date: 2021
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    detail.hit.zdb_id: 2036787-9
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  • 5
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    A SNP in a let-7 microRNA Complementary Site in the KRAS 3′ Untranslated Region Increases Non–Small Cell Lung Cancer Risk
    American Association for Cancer Research (AACR) ; 2008
    In:  Cancer Research Vol. 68, No. 20 ( 2008-10-15), p. 8535-8540
    Details
    In: Cancer Research, American Association for Cancer Research (AACR), Vol. 68, No. 20 ( 2008-10-15), p. 8535-8540
    Abstract: Lung cancer is the leading cause of cancer deaths worldwide, yet few genetic markers of lung cancer risk useful for screening exist. The let-7 family-of-microRNAs (miRNA) are global genetic regulators important in controlling lung cancer oncogene expression by binding to the 3′ untranslated regions of their target mRNAs. The purpose of this study was to identify single nucleotide polymorphisms (SNP) that could modify let-7 binding and to assess the effect of such SNPs on target gene regulation and risk for non–small cell lung cancer (NSCLC). let-7 complementary sites (LCS) were sequenced in the KRAS 3′ untranslated region from 74 NSCLC cases to identify mutations and SNPs that correlated with NSCLC. The allele frequency of a previously unidentified SNP at LCS6 was characterized in 2,433 people (representing 46 human populations). The frequency of the variant allele is 18.1% to 20.3% in NSCLC patients and 5.8% in world populations. The association between the SNP and the risk for NSCLC was defined in two independent case-control studies. A case-control study of lung cancer from New Mexico showed a 2.3-fold increased risk (confidence interval, 1.1–4.6; P = 0.02) for NSCLC cancer in patients who smoked & lt;40 pack-years. This association was validated in a second independent case-control study. Functionally, the variant allele results in KRAS overexpression in vitro. The LCS6 variant allele in a KRAS miRANA complementary site is significantly associated with increased risk for NSCLC among moderate smokers and represents a new paradigm for let-7 miRNAs in lung cancer susceptibility. [Cancer Res 2008;68(20):8535–40]
    Type of Medium: Online Resource
    ISSN: 0008-5472 , 1538-7445
    URL: Article
    DOI: 10.1158/0008-5472.CAN-08-2129
    RVK:
    XA 36000
    RVK:
    XA 10000
    Language: English
    Publisher: American Association for Cancer Research (AACR)
    Publication Date: 2008
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    detail.hit.zdb_id: 410466-3
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  • 6
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    The Pediatric Precision Oncology INFORM Registry: Clinical Outcome and Benefit for Patients with Very High-Evidence Targets
    American Association for Cancer Research (AACR) ; 2021
    In:  Cancer Discovery Vol. 11, No. 11 ( 2021-11-01), p. 2764-2779
    Details
    In: Cancer Discovery, American Association for Cancer Research (AACR), Vol. 11, No. 11 ( 2021-11-01), p. 2764-2779
    Abstract: INFORM is a prospective, multinational registry gathering clinical and molecular data of relapsed, progressive, or high-risk pediatric patients with cancer. This report describes long-term follow-up of 519 patients in whom molecular alterations were evaluated according to a predefined seven-scale target prioritization algorithm. Mean turnaround time from sample receipt to report was 25.4 days. The highest target priority level was observed in 42 patients (8.1%). Of these, 20 patients received matched targeted treatment with a median progression-free survival of 204 days [95% confidence interval (CI), 99–not applicable], compared with 117 days (95% CI, 106–143; P = 0.011) in all other patients. The respective molecular targets were shown to be predictive for matched treatment response and not prognostic surrogates for improved outcome. Hereditary cancer predisposition syndromes were identified in 7.5% of patients, half of which were newly identified through the study. Integrated molecular analyses resulted in a change or refinement of diagnoses in 8.2% of cases. Significance: The pediatric precision oncology INFORM registry prospectively tested a target prioritization algorithm in a real-world, multinational setting and identified subgroups of patients benefiting from matched targeted treatment with improved progression-free survival, refinement of diagnosis, and identification of hereditary cancer predisposition syndromes. See related commentary by Eggermont et al., p. 2677 . This article is highlighted in the In This Issue feature, p. 2659
    Type of Medium: Online Resource
    ISSN: 2159-8274 , 2159-8290
    URL: Article
    DOI: 10.1158/2159-8290.CD-21-0094
    Language: English
    Publisher: American Association for Cancer Research (AACR)
    Publication Date: 2021
    detail.hit.zdb_id: 2607892-2
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  • 7
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    The mTOR Kinase Inhibitors, CC214-1 and CC214-2, Preferentially Block the Growth of EGFRvIII-Activated Glioblastomas
    American Association for Cancer Research (AACR) ; 2013
    In:  Clinical Cancer Research Vol. 19, No. 20 ( 2013-10-15), p. 5722-5732
    Details
    In: Clinical Cancer Research, American Association for Cancer Research (AACR), Vol. 19, No. 20 ( 2013-10-15), p. 5722-5732
    Abstract: Purpose: mTOR pathway hyperactivation occurs in approximately 90% of glioblastomas, but the allosteric mTOR inhibitor rapamycin has failed in the clinic. Here, we examine the efficacy of the newly discovered ATP-competitive mTOR kinase inhibitors CC214-1 and CC214-2 in glioblastoma, identifying molecular determinants of response and mechanisms of resistance, and develop a pharmacologic strategy to overcome it. Experimental Design: We conducted in vitro and in vivo studies in glioblastoma cell lines and an intracranial model to: determine the potential efficacy of the recently reported mTOR kinase inhibitors CC214-1 (in vitro use) and CC214-2 (in vivo use) at inhibiting rapamycin-resistant signaling and blocking glioblastoma growth and a novel single-cell technology—DNA Encoded Antibody Libraries—was used to identify mechanisms of resistance. Results: Here, we show that CC214-1 and CC214-2 suppress rapamycin-resistant mTORC1 signaling, block mTORC2 signaling, and significantly inhibit the growth of glioblastomas in vitro and in vivo. EGFRvIII expression and PTEN loss enhance sensitivity to CC214 compounds, consistent with enhanced efficacy in strongly mTOR-activated tumors. Importantly, CC214 compounds potently induce autophagy, preventing tumor cell death. Genetic or pharmacologic inhibition of autophagy greatly sensitizes glioblastoma cells and orthotopic xenografts to CC214-1- and CC214-2–induced cell death. Conclusions: These results identify CC214-1 and CC214-2 as potentially efficacious mTOR kinase inhibitors in glioblastoma, and suggest a strategy for identifying patients most likely to benefit from mTOR inhibition. In addition, this study also shows a central role for autophagy in preventing mTOR-kinase inhibitor-mediated tumor cell death, and suggests a pharmacologic strategy for overcoming it. Clin Cancer Res; 19(20); 5722–32. ©2013 AACR.
    Type of Medium: Online Resource
    ISSN: 1078-0432 , 1557-3265
    URL: Article
    DOI: 10.1158/1078-0432.CCR-13-0527
    RVK:
    XA 36791
    Language: English
    Publisher: American Association for Cancer Research (AACR)
    Publication Date: 2013
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  • 8
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    Fyn and Src Are Effectors of Oncogenic Epidermal Growth Factor Receptor Signaling in Glioblastoma Patients
    American Association for Cancer Research (AACR) ; 2009
    In:  Cancer Research Vol. 69, No. 17 ( 2009-09-01), p. 6889-6898
    Details
    In: Cancer Research, American Association for Cancer Research (AACR), Vol. 69, No. 17 ( 2009-09-01), p. 6889-6898
    Abstract: Activating epidermal growth factor receptor (EGFR) mutations are common in many cancers including glioblastoma. However, clinical responses to EGFR inhibitors are infrequent and short-lived. We show that the Src family kinases (SFK) Fyn and Src are effectors of oncogenic EGFR signaling, enhancing invasion and tumor cell survival in vivo. Expression of a constitutively active EGFR mutant, EGFRvIII, resulted in activating phosphorylation and physical association with Src and Fyn, promoting tumor growth and motility. Gene silencing of Fyn and Src limited EGFR- and EGFRvIII-dependent tumor cell motility. The SFK inhibitor dasatinib inhibited invasion, promoted tumor regression, and induced apoptosis in vivo, significantly prolonging survival of an orthotopic glioblastoma model expressing endogenous EGFRvIII. Dasatinib enhanced the efficacy of an anti-EGFR monoclonal antibody (mAb 806) in vivo, further limiting tumor growth and extending survival. Examination of a large cohort of clinical samples showed frequent coactivation of EGFR and SFKs in glioblastoma patients. These results establish a mechanism linking EGFR signaling with Fyn and Src activation to promote tumor progression and invasion in vivo and provide rationale for combined anti-EGFR and anti-SFK targeted therapies. [Cancer Res 2009;69(17):6889–98]
    Type of Medium: Online Resource
    ISSN: 0008-5472 , 1538-7445
    URL: Article
    DOI: 10.1158/0008-5472.CAN-09-0347
    RVK:
    XA 36000
    RVK:
    XA 10000
    Language: English
    Publisher: American Association for Cancer Research (AACR)
    Publication Date: 2009
    detail.hit.zdb_id: 2036785-5
    detail.hit.zdb_id: 1432-1
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  • 9
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    Abstract A43: Long noncoding RNAs as targets of mammary tumor cell proliferation and migration
    American Association for Cancer Research (AACR) ; 2016
    In:  Cancer Research Vol. 76, No. 6_Supplement ( 2016-03-15), p. A43-A43
    Details
    In: Cancer Research, American Association for Cancer Research (AACR), Vol. 76, No. 6_Supplement ( 2016-03-15), p. A43-A43
    Abstract: Objective: Recent genome-wide studies revealed that as much as 80% of the human genome can be transcribed whereas only 2% of this RNA is translated into proteins. Non-coding transcripts can be subdivided into several groups, with long non-coding RNAs (lncRNAs) representing the largest and most diverse class. With breast cancer being the most frequent malignancy in women worldwide, we set out to investigate the potential of lncRNAs as novel therapeutic targets. Methods: We focused on the luminal B and the HER2/neu-positive subtypes of breast cancer, as both are associated with high prevalence and bad prognosis. By performing RNA-Seq on tumor sections and mammary organoids from MMTV-PyMT and MMTV-Neu-NDL mice, modeling the luminal B and HER2/neu-amplified subtypes of human breast cancer respectively, we generated a comprehensive catalog of differentially expressed lncRNAs. We functionally validated the role of a subset of these lncRNAs by antisense oligonucleotide (ASO) mediated knockdown in primary mammary tumor cells and 3D ex vivo organoids. Results: We identified several hundred potentially oncogenic lncRNAs that were over-expressed in a subtype-specific manner as well as numerous lncRNAs up-regulated in both MMTV-PyMT and MMTV-Neu-NDL tumors. To narrow down the candidate list of lncRNAs with the highest therapeutic potential, we sorted the data computationally and defined a subset of previously uncharacterized lncRNAs as Mammary Tumor Associated RNAs (MaTARs). Upon independent knockdown of several MaTARs, we observed significantly reduced cell proliferation, invasion and/or collective cell migration in a cancer-specific context. Conclusion: MaTARs are likely important drivers of mammary tumor progression and/or metastasis and represent promising new therapeutic targets. Future studies will focus on the molecular characterization of these lncRNAs and elucidation of their potential role(s) in mammary tumor progression and metastasis. Citation Format: Sarah D. Diermeier, Kung-Chi Chang, Susan M. Freier, Frank Rigo, C. Frank Bennett, David L. Spector. Long noncoding RNAs as targets of mammary tumor cell proliferation and migration. [abstract]. In: Proceedings of the AACR Special Conference on Noncoding RNAs and Cancer: Mechanisms to Medicines ; 2015 Dec 4-7; Boston, MA. Philadelphia (PA): AACR; Cancer Res 2016;76(6 Suppl):Abstract nr A43.
    Type of Medium: Online Resource
    ISSN: 0008-5472 , 1538-7445
    URL: Article
    DOI: 10.1158/1538-7445.NONRNA15-A43
    RVK:
    XA 36000
    RVK:
    XA 10000
    Language: English
    Publisher: American Association for Cancer Research (AACR)
    Publication Date: 2016
    detail.hit.zdb_id: 2036785-5
    detail.hit.zdb_id: 1432-1
    detail.hit.zdb_id: 410466-3
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  • 10
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    GRHL1 Acts as Tumor Suppressor in Neuroblastoma and Is Negatively Regulated by MYCN and HDAC3
    American Association for Cancer Research (AACR) ; 2014
    In:  Cancer Research Vol. 74, No. 9 ( 2014-05-01), p. 2604-2616
    Details
    In: Cancer Research, American Association for Cancer Research (AACR), Vol. 74, No. 9 ( 2014-05-01), p. 2604-2616
    Abstract: Neuroblastoma is an embryonic solid tumor of neural crest origin and accounts for 11% of all cancer-related deaths in children. Novel therapeutic strategies are therefore urgently required. MYCN oncogene amplification, which occurs in 20% of neuroblastomas, is a hallmark of high risk. Here, we aimed to exploit molecular mechanisms that can be pharmacologically addressed with epigenetically modifying drugs, such as histone deacetylase (HDAC) inhibitors. Grainyhead-like 1 (GRHL1), a gene critical for Drosophila neural development, belonged to the genes most strongly responding to HDAC inhibitor treatment of neuroblastoma cells in a genome-wide screen. An increase in the histone H4 pan-acetylation associated with its promoter preceded transcriptional activation. Physically adjacent, HDAC3 and MYCN colocalized to the GRHL1 promoter and repressed its transcription. High-level GRHL1 expression in primary neuroblastomas correlated on transcriptional and translational levels with favorable patient survival and established clinical and molecular markers for favorable tumor biology, including lack of MYCN amplification. Enforced GRHL1 expression in MYCN-amplified neuroblastoma cells with low endogenous GRHL1 levels abrogated anchorage-independent colony formation, inhibited proliferation, and retarded xenograft growth in mice. GRHL1 knockdown in MYCN single-copy cells with high endogenous GRHL1 levels promoted colony formation. GRHL1 regulated 170 genes genome-wide, and most were involved in pathways regulated during neuroblastomagenesis, including nervous system development, proliferation, cell–cell adhesion, cell spreading, and cellular differentiation. In summary, the data presented here indicate a significant role of HDAC3 in the MYCN-mediated repression of GRHL1 and suggest drugs that block HDAC3 activity and suppress MYCN expression as promising candidates for novel treatment strategies of high-risk neuroblastoma. Cancer Res; 74(9); 2604–16. ©2014 AACR.
    Type of Medium: Online Resource
    ISSN: 0008-5472 , 1538-7445
    URL: Article
    DOI: 10.1158/0008-5472.CAN-13-1904
    RVK:
    XA 36000
    RVK:
    XA 10000
    Language: English
    Publisher: American Association for Cancer Research (AACR)
    Publication Date: 2014
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