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  • American Association for Cancer Research (AACR)  (75)
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  • 1
    Online Resource
    Online Resource
    A novel class of pyranocoumarin anti–androgen receptor signaling compounds
    American Association for Cancer Research (AACR) ; 2007
    In:  Molecular Cancer Therapeutics Vol. 6, No. 3 ( 2007-03-01), p. 907-917
    Details
    In: Molecular Cancer Therapeutics, American Association for Cancer Research (AACR), Vol. 6, No. 3 ( 2007-03-01), p. 907-917
    Abstract: Androgen and the androgen receptor (AR)–mediated signaling are crucial for prostate cancer development. Novel agents that can inhibit AR signaling in ligand-dependent and ligand-independent manners are desirable for the chemoprevention of prostate carcinogenesis and for the treatment of advanced prostate cancer. We have shown recently that the pyranocoumarin compound decursin from the herb Angelica gigas possesses potent anti-AR activities distinct from the anti–androgen bicalutamide. Here, we compared the anti-AR activities and the cell cycle arrest and apoptotic effects of decursin and two natural analogues in the androgen-dependent LNCaP human prostate cancer cell culture model to identify structure-activity relationships and mechanisms. Decursin and its isomer decursinol angelate decreased prostate-specific antigen expression with IC50 of ∼1 μmol/L. Both inhibited the androgen-stimulated AR nuclear translocation and transactivation, decreased AR protein abundance through proteasomal degradation, and induced G0/1 arrest and morphologic differentiation. They also induced caspase-mediated apoptosis and reactive oxygen species at higher concentrations. Furthermore, they lacked the agonist activity of bicalutamide in the absence of androgen and were more potent than bicalutamide for suppressing androgen-stimulated cell growth. Decursinol, which does not contain a side chain, lacked the reactive oxygen species induction and apoptotic activities and exerted paradoxically an inhibitory and a stimulatory effect on AR signaling and cell growth. In conclusion, decursin and decursinol angelate are members of a novel class of nonsteroidal compounds that exert a long-lasting inhibition of both ligand-dependent and ligand-independent AR signaling. The side chain is critical for sustaining the anti-AR activities and the growth arrest and apoptotic effects. [Mol Cancer Ther 2007;6(3):907–17]
    Type of Medium: Online Resource
    ISSN: 1535-7163 , 1538-8514
    URL: Article
    DOI: 10.1158/1535-7163.MCT-06-0231
    Language: English
    Publisher: American Association for Cancer Research (AACR)
    Publication Date: 2007
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  • 2
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    Abstract 5138: Cetuximab resistance induced by hepatocyte growth factor is overcome by MET inhibition in KRAS, NRAS, and BRAF wild-type colorectal cancer
    American Association for Cancer Research (AACR) ; 2022
    In:  Cancer Research Vol. 82, No. 12_Supplement ( 2022-06-15), p. 5138-5138
    Details
    In: Cancer Research, American Association for Cancer Research (AACR), Vol. 82, No. 12_Supplement ( 2022-06-15), p. 5138-5138
    Abstract: Background: Recent evidence has highlighted the role of hepatocyte growth factor (HGF) as a putative biomarker to predict EGFR inhibitor resistance. This study investigated the impact of plasma HGF levels on EGFR inhibition and the therapeutic implications of MET inhibition in KRAS, NRAS, and BRAF (RAS/RAF) wild-type colorectal cancer (CRC). Methods: Clinical outcomes were analyzed according to the plasma HGF levels in patients with metastatic CRC (mCRC) receiving palliative first-line cetuximab or bevacizumab + FOLFIRI chemotherapy. Then, in vitro experiments were conducted to validate the clinical findings and to establish pre-clinical evidence of MET inhibition in the HGF-high population. Results: From March 2015 to September 2019, a total of 80 patients were enrolled. The median age was 63 (range, 24-85) years. Of these, 45 patients (56.2%) were treated with bevacizumab + FOLFIRI and 35 patients (43.8%) were treated with cetuximab + FOLFIRI. Among patients with evaluable disease (43 patients (95.6%) in the bevacizumab group and 34 patients (97.1%) in the cetuximab group), the objective response rate was 60.0% and 37.8%, respectively (p=0.162). The median serum HGF level was 374.75 (range, 9.43-30,644.44) pg/mL, and the optimal cut-off value of HGF levels was 12.70 pg/mL by the maximal chi-square method. During a median follow-up of 29.3 (range, 1.2-71.3) months, both progression-free survival (PFS) and overall survival (OS) were significantly shorter in the high HGF group compared with the low HGF group: median 11.8 (95% confidence interval [CI], 10.5-13.1) months vs. 24.7 (95% CI, 23.4-25.9) months for PFS (p=0.009), and median 21.1 (95% CI, 17.9-24.3) months vs. not reached for OS (p=0.018). The difference in PFS and OS was statistically significant in the cetuximab group (p=0.003 for PFS and p=0.035 for OS), but not in the bevacizumab group. In five RAS/RAF wild-type CRC cell lines (Caco-2, COLO 320DM, KM12C, SNU-C1, and SNU-C4), the addition of HGF activated ERK1/2 and AKT via MET phosphorylation. In the cytotoxicity assays, Caco-2 and SNU-C4 were relatively sensitive to cetuximab compared with the others and, in the presence of HGF, cetuximab sensitivity was significantly decreased in the two cells. Moreover, capmatinib, a MET inhibitor, abrogated the effect of HGF on common downstream signaling pathways of EGFR and MET and thus the cetuximab resistance was significantly overcome in vitro. Conclusions: Among patients with mCRC receiving cetuximab + FOLFIRI, those with high plasma HGF levels had significantly worse PFS and OS. HGF induced cetuximab resistance by AKT and ERK activation while capmatinib, a MET inhibitor, significantly increased the anti-tumor effects of cetuximab in the presence of HGF in vitro. Our data may provide evidence of future clinical trials of dual EGFR and MET targeting strategies in patients with HGF-high, RAS/RAF wild-type mCRC. Citation Format: Sang-A Kim, Hyejoo Park, Kui-Jin Kim, Ji-Won Kim, Ji Hea Sung, Milang Nam, Ju Hyun Lee, Eun Hee Jung, Koung Jin Suh, Ji Yun Lee, Se Hyun Kim, Jeong-Ok Lee, Jin Won Kim, Yu Jung Kim, Jee Hyun Kim, Soo-Mee Bang, Jong Seok Lee, Keun-Wook Lee. Cetuximab resistance induced by hepatocyte growth factor is overcome by MET inhibition in KRAS, NRAS, and BRAF wild-type colorectal cancer [abstract] . In: Proceedings of the American Association for Cancer Research Annual Meeting 2022; 2022 Apr 8-13. Philadelphia (PA): AACR; Cancer Res 2022;82(12_Suppl):Abstract nr 5138.
    Type of Medium: Online Resource
    ISSN: 1538-7445
    URL: Article
    DOI: 10.1158/1538-7445.AM2022-5138
    Language: English
    Publisher: American Association for Cancer Research (AACR)
    Publication Date: 2022
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  • 3
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    Abstract 747: Evaluation of Src as a therapeutic target and development of biomarkers of Src inhibitor in cancer
    American Association for Cancer Research (AACR) ; 2014
    In:  Cancer Research Vol. 74, No. 19_Supplement ( 2014-10-01), p. 747-747
    Details
    In: Cancer Research, American Association for Cancer Research (AACR), Vol. 74, No. 19_Supplement ( 2014-10-01), p. 747-747
    Abstract: Background: Src is a nonreceptor tyrosine kinase involved in the crosstalk and mediation of many signaling pathways that promote cell proliferation, invasion and angiogenesis. Elevation of Src activity has been reported in many types of cancers including gastric cancer (GC) and biliary tract cancer (BTC). The purpose of this study is to evaluate Src as a therapeutic target and to elaborate the biomarkers of Src inhibitor in GC and BTC. Methods: Ten gastric cancer cell lines (SNU-1, 5, 16, 216, 601, 620, 638, 668, 719, NCI-N87) and 8 biliary tract cancer cell lines (SNU-245, 308, 478, 869, 1079, 1196, HuCCT1, TFK1) were used. Saracatinib and bosutinib were used as Src inhibitors. MTT assay, colony formation assay and 3D culture were done for determining growth inhibitory effect of Src inhibitors, alone or in combination with chemotherapeutic agents (5-FU, gemcitabine, cisplatin). Cell cycle analysis was done by FACS Calibur flow cytometer. Matrigel invasion assay and wound healing assay were done. The methods described by Chou and Talalay were used to determine whether a synergistic effect existed between drug combination. Tumor xenograft model was made and used for in vivo test of Src inhibitors. Results: Among 10 GC cells, SNU216 and NCI-N87 were sensitive to Src inhibitor. These sensitive cells showed high levels of pSRC(Y416) and pFAK (Y861, Y397, Y925). These 2 sensitive GC cells are both HER2 amplified cells. However, HER2-positive breast cancer (BC) cells (SKBR3, BT474, MDA-MB453) were resistant to Src inhibitor. Contrast to these resistant BC cells, SNU216 and N87 showed high expression of integrin αV, β4 and β8. Especially, in case of integrin β8, the mRNA/protein levels were highest in SNU216 and N87 among all GC cells. Src inhibitor-sensitive GC cells showed the apoptosis by Src inhibitor and synergism with 5-FU in vitro and in vivo. Among 8 BTC cells, 3 cells were sensitive to Src inhibitor (SNU308, SNU478 and HuCCT1) in terms of growth inhibition and migration/invasion inhibition. Sensitive cells showed high levels of integrin α2, α3 and β4. Src inhibitor induced G1 arrest and decreased pSrc, pFAK, and pERK in sensitive cells. Inhibition of pSrc was accompanied with increase of PTEN and decrease of pAKT. Src inhibitor showed the synergistic effects with cytotoxic chemotherapeutic agents (gemcitabine and cisplatin) in vitro and in vivo. When the Src was inhibited, pSTAT3 was increased thru increase of IL-6 in some cells. Conclusion: Taken together, Src could be a potential therapeutic target in gastric cancer and biliary tract cancer. The role of integrin as a biomarker for Src inhibitor should be further investigated. Citation Format: Ah-Rong Nam, Hyun-Jin Nam, Kyo Hwa Kang, Ji Eun Park, Tae Yong Kim, Sae-Won Han, Sang-Hyun Song, Seock-Ah Im, Tae-You Kim, Do-Youn Oh, Yung-Jue Bang. Evaluation of Src as a therapeutic target and development of biomarkers of Src inhibitor in cancer. [abstract] . In: Proceedings of the 105th Annual Meeting of the American Association for Cancer Research; 2014 Apr 5-9; San Diego, CA. Philadelphia (PA): AACR; Cancer Res 2014;74(19 Suppl):Abstract nr 747. doi:10.1158/1538-7445.AM2014-747
    Type of Medium: Online Resource
    ISSN: 0008-5472 , 1538-7445
    URL: Article
    DOI: 10.1158/1538-7445.AM2014-747
    RVK:
    XA 36000
    RVK:
    XA 10000
    Language: English
    Publisher: American Association for Cancer Research (AACR)
    Publication Date: 2014
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  • 4
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    Abstract 2521: Patient GBM cell originated secretome analysis identifies cytokine A, as a potent therapeutic target
    American Association for Cancer Research (AACR) ; 2018
    In:  Cancer Research Vol. 78, No. 13_Supplement ( 2018-07-01), p. 2521-2521
    Details
    In: Cancer Research, American Association for Cancer Research (AACR), Vol. 78, No. 13_Supplement ( 2018-07-01), p. 2521-2521
    Abstract: GBM is the most aggressive human primary brain tumor and leads to poor clinical outcomes. According to previous studies, exogenous factors secreted from primary brain tumor cells can change the growth pattern of normal cells. We analyzed the ingredients of cell culture media from two patient glioblastoma cells which can grow without growth factors. As a result, we selected a significant factor for tumor cell growth which is called cytokine A, the Heparin-binding growth factor. Because of the cell viability maintenance ability of cytokine A, we tried to investigate detailed mechanism of cytokine A and applied the result to the combination therapy. Cytokine A is critical for tumorigenesis of GBM by modulating DNA damage signaling and cell cycle through ROS. For that reason, cytokine A is effective therapeutic target and can be used in combination therapy. Citation Format: Suji Han, Kayoung Shin, Kyoungmin Lee, Sungsoo Kim, Hyunju Kang, Jin-Ku Lee, Hyun Nam, Kyeung Min Joo, Do-Hyun Nam. Patient GBM cell originated secretome analysis identifies cytokine A, as a potent therapeutic target [abstract]. In: Proceedings of the American Association for Cancer Research Annual Meeting 2018; 2018 Apr 14-18; Chicago, IL. Philadelphia (PA): AACR; Cancer Res 2018;78(13 Suppl):Abstract nr 2521.
    Type of Medium: Online Resource
    ISSN: 0008-5472 , 1538-7445
    URL: Article
    DOI: 10.1158/1538-7445.AM2018-2521
    RVK:
    XA 36000
    RVK:
    XA 10000
    Language: English
    Publisher: American Association for Cancer Research (AACR)
    Publication Date: 2018
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  • 5
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    HDAC2 Provides a Critical Support to Malignant Progression of Hepatocellular Carcinoma through Feedback Control of mTORC1 and AKT
    American Association for Cancer Research (AACR) ; 2014
    In:  Cancer Research Vol. 74, No. 6 ( 2014-03-15), p. 1728-1738
    Details
    In: Cancer Research, American Association for Cancer Research (AACR), Vol. 74, No. 6 ( 2014-03-15), p. 1728-1738
    Abstract: Aberrant regulation of histone deacetylase 2 (HDAC2) contributes to malignant progression in various cancers, but the underlying mechanism leading to the activation of oncogenic HDAC2 remains unknown. In this study, we show that HDAC2 expression is upregulated in a large cohort of patients with human hepatocellular carcinoma, and that high expression of HDAC2 was significantly associated with poor prognosis of patients with hepatocellular carcinoma. We found that mTORC1/NF-κBp50 signaling is necessary for the growth factor–induced HDAC2 and is sustained in hepatocellular carcinoma, but not in normal hepatic cells. Growth factor–induced mTORC1 activates the nuclear translocation of NF-κBp50, where it binds to the intragenic sequences of the HDAC2 gene and promotes its transcription. Hepatocellular carcinoma tissues derived from chemical-induced mouse and rat liver cancer models validated that mTORC1 activation and NF-κBp50 nuclear translocation are essential for the transcriptional activation of oncogenic HDAC2 in hepatocellular carcinoma. In addition, we demonstrate that HDAC2 is required to maintain mTORC1 activity by stabilizing the mTOR/RAPTOR complex. Elevated expression of HDAC2 triggers a positive feedback loop that activates AKT phosphorylation via the transcriptional modulation of phosphoinositide signaling molecules. Bioinformatics analysis of HDAC2 signature and immunoblot analysis of mesenchymal genes also evidenced that HDAC2 plays a role in the malignant behavior of tumor cells by Snail induction and simultaneously E-cadherin suppression in hepatocellular carcinoma cells. These findings establish a molecular mechanism responsible for the activation of oncogenic HDAC2, which explains how growth factor–induced HDAC2 maintains mitogenic signaling and function during hepatocellular malignant progression and provide a novel strategy for therapeutic intervention in liver cancer. Cancer Res; 74(6); 1728–38. ©2014 AACR.
    Type of Medium: Online Resource
    ISSN: 0008-5472 , 1538-7445
    URL: Article
    DOI: 10.1158/0008-5472.CAN-13-2109
    RVK:
    XA 36000
    RVK:
    XA 10000
    Language: English
    Publisher: American Association for Cancer Research (AACR)
    Publication Date: 2014
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  • 6
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    Abstract 2386: Amphiregulin confers trastuzumab resistance by activating PI3K/Akt pathway in HER2-positive breast cancer.
    American Association for Cancer Research (AACR) ; 2013
    In:  Cancer Research Vol. 73, No. 8_Supplement ( 2013-04-15), p. 2386-2386
    Details
    In: Cancer Research, American Association for Cancer Research (AACR), Vol. 73, No. 8_Supplement ( 2013-04-15), p. 2386-2386
    Abstract: Background: Amphiregulin is a ligand for the epidermal growth factor receptor (EGFR). Human epidermal growth factor receptor 2 (HER2) shares common signal pathways and forms a heterodimer with EGFR. In this study, we investigated the effect of amphiregulin on trastuzumab therapy in HER2-positive breast cancer. Methods: We analyzed serum amphiregulin levels by enzyme-linked immunosorbent assay (ELISA) from baseline serum samples obtained from HER2-positive metastatic breast cancer patients who received first-line trastuzumab plus taxane chemotherapy. In addition, in vitro experiments were performed to elucidate the biologic mechanism of clinical findings related to amphiregulin using SK-BR-3 and BT-474 cell lines. Results: Between October 2004 and July 2009, a total of 50 women with HER2-positive metastatic breast cancer were consecutively enrolled. The median age was 47 years (range, 27-72 years). Eighteen patients (36.0%) received weekly paclitaxel plus trastuzumab, 24 patients (48.0%) tri-weekly paclitaxel plus trastuzumab, and 8 patients (16.0%) tri-weekly docetaxel plus trastuzumab. Among 43 patients with measurable lesions, the response rate (RR) was 76.7%. The median follow-up duration was 29.2 months (range, 0.7-63.3 months). The median progression-free survival (PFS) was 17.6 months (95% confidence interval (CI), 13.4-21.9 months). The median overall survival (OS) was 47.0 months (95% CI, 35.3-58.6 months). The median serum amphiregulin level was 1.0 ng/mL with a maximum level of 4.4 ng/mL. Patients with high serum amphiregulin levels (≥0.5 ng/mL) had significantly shorter PFS (p=0.018) along with a tendency toward lower RR (p=0.237) and shorter OS (p=0.529) than the others. The in vitro colony forming assay demonstrated that the addition of amphiregulin resulted in increased proliferation of both SK-BR-3 and BT-474 cells. In addition, the anti-proliferative effect of trastuzumab was decreased in the presence of amphiregulin in both SK-BR-3 and BT-474 cells. The Western blot analysis showed that amphiregulin increased the phosphorylation of Akt and its downstream molecules in both SK-BR-3 and BT-474 cells. In addition, in the presence of amphiregulin, sustained phosphorylation of Akt and its downstream molecules was observed after trastuzumab treatment in both SK-BR-3 and BT-474 cells. Conclusions: High serum amphiregulin levels (≥0.5 ng/mL) predicted disease progression after first-line trastuzumab plus taxane chemotherapy in patients with HER2-positive metastatic breast cancer. Amphiregulin promoted the proliferation of HER2-positive breast cancer cells in vitro and induced trastuzumab resistance by activating PI3K/Akt pathway. Our results suggest that the measurement of serum amphiregulin levels by ELISA may provide additional information for the clinical outcome of trastuzumab-based chemotherapy in patients with HER2-positive breast cancer. Citation Format: Ji-Won Kim, Young Seok Joung, Ahrum Min, Hyun-Jin Nam, Jee Hyun Kim, Seock-Ah Im, Kyung-Hun Lee, Jin-Soo Kim, Tae-Yong Kim, Sae-Won Han, Yoon Kyung Jeon, Do-Youn Oh, Tae-You Kim, In Ae Park. Amphiregulin confers trastuzumab resistance by activating PI3K/Akt pathway in HER2-positive breast cancer. [abstract] . In: Proceedings of the 104th Annual Meeting of the American Association for Cancer Research; 2013 Apr 6-10; Washington, DC. Philadelphia (PA): AACR; Cancer Res 2013;73(8 Suppl):Abstract nr 2386. doi:10.1158/1538-7445.AM2013-2386
    Type of Medium: Online Resource
    ISSN: 0008-5472 , 1538-7445
    URL: Article
    DOI: 10.1158/1538-7445.AM2013-2386
    RVK:
    XA 36000
    RVK:
    XA 10000
    Language: English
    Publisher: American Association for Cancer Research (AACR)
    Publication Date: 2013
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  • 7
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    Patient-Derived Xenografts from Non–Small Cell Lung Cancer Brain Metastases Are Valuable Translational Platforms for the Development of Personalized Targeted Therapy
    American Association for Cancer Research (AACR) ; 2015
    In:  Clinical Cancer Research Vol. 21, No. 5 ( 2015-03-01), p. 1172-1182
    Details
    In: Clinical Cancer Research, American Association for Cancer Research (AACR), Vol. 21, No. 5 ( 2015-03-01), p. 1172-1182
    Abstract: Purpose: The increasing prevalence of distant metastases from non–small cell lung cancer (NSCLC) indicates an urgent need for novel therapeutic modalities. Brain metastasis is particularly common in NSCLC, with severe adverse effects on clinical prognosis. Although the molecular heterogeneity of NSCLC and availability of various targeted agents suggest personalized therapeutic approaches for such brain metastases, further development of appropriate preclinical models is needed to validate the strategies. Experimental Design: We established patient-derived xenografts (PDX) using NSCLC brain metastasis surgical samples and elucidated their possible preclinical and clinical implications for personalized treatment. Results: NSCLC brain metastases (n = 34) showed a significantly higher successful PDX establishment rate than primary specimens (n = 64; 74% vs. 23%). PDXs derived from NSCLC brain metastases recapitulated the pathologic, genetic, and functional properties of corresponding parental tumors. Furthermore, tumor spheres established in vitro from the xenografts under serum-free conditions maintained their in vivo brain metastatic potential. Differential phenotypic and molecular responses to 20 targeted agents could subsequently be screened in vitro using these NSCLC PDXs derived from brain metastases. Although PDX establishment from primary NSCLCs was significantly influenced by histologic subtype, clinical aggressiveness, and genetic alteration status, the brain metastases exhibited consistently adequate in vivo tumor take rate and in vitro tumor sphere formation capacity, regardless of clinical and molecular conditions. Conclusions: Therefore, PDXs from NSCLC brain metastases may better represent the heterogeneous advanced NSCLC population and could be utilized as preclinical models to meet unmet clinical needs such as drug screening for personalized treatments. Clin Cancer Res; 21(5); 1172–82. ©2014 AACR.
    Type of Medium: Online Resource
    ISSN: 1078-0432 , 1557-3265
    URL: Article
    DOI: 10.1158/1078-0432.CCR-14-1589
    RVK:
    XA 36791
    Language: English
    Publisher: American Association for Cancer Research (AACR)
    Publication Date: 2015
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  • 8
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    Abstract 3370: Comparative analyses of multi-omics profiles reveal distinctive molecular signatures of young Asian breast cancers
    American Association for Cancer Research (AACR) ; 2017
    In:  Cancer Research Vol. 77, No. 13_Supplement ( 2017-07-01), p. 3370-3370
    Details
    In: Cancer Research, American Association for Cancer Research (AACR), Vol. 77, No. 13_Supplement ( 2017-07-01), p. 3370-3370
    Abstract: Breast cancers (BC) in younger, premenopausal patients (YBC) tend to be more aggressive with worse prognosis, higher chance of relapse and poorer response to endocrine therapies compared to breast cancers in older patients. The proportion of YBC (age ≤ 40) among BC in East Asia is estimated to be 16-32%, significantly higher than the 7% reported in Western countries. In addition, approximately half of the Asian BC patients were premenopausal compared to 15-30% in the West. To characterize the molecular bases of Asian YBC, we have performed whole-exome sequencing (WES) and whole-transcriptome sequencing (WTS) on tumor and matched normal samples from 168 Korean BC patients consisting of 106 YBC cases (age ≤ 40) and 62 OBC cases (age & gt; 40). We then performed comparison analyses with the TCGA BC cohort consisting of 1,116 tumors from primarily Caucasian patients, also grouped by age into YBC (age ≤ 40), IBC (40 & lt; age ≤ 60) and OBC (age & gt; 60). We performed logistic regression analyses to identify differentially expressed (DE) genes and pathways among age-based cohorts while controlling for the confounding effects of molecular subtype, tumor purity and stage. Within the Asian cohort, we found that estrogen response, endocrine therapy resistance, and various metabolism pathways are up-regulated in YBCs while cell cycle, proliferation and inflammatory pathways are up-regulated in OBCs. To separately examine molecular signatures from tumor, stroma and normal compartments, we used non-negative matrix factorization (NMF) analyses to virtually dissect bulk tumor expression data and identified 14 factors including 3 factors associated with normal tissues, 1 factor associated with stroma and 1 factor associated with tumor infiltrating leukocytes (TILs). By examining the correlation between pathway gene expression and NMF factors, we inferred that DE pathways such as fatty acid metabolism, bile acid biosynthesis, and epithelial-to-mesenchymal transition (EMT) were mainly active in stromal and normal tissue compartments. The TIL factor was significantly enriched in Asian BCs relative to Caucasian BCs with the highest TIL factor weight observed in Asian OBCs. Using gene expression signatures representing distinct types of TILs, we classified the combined cohort into three subtypes of varying TIL activities. Consistent with results from the NMF analysis, the TIL-high subtype is also significantly enriched in Asian BCs relative to Caucasian BCs. To our knowledge, this is the first large-scale multi-omics study of Asian breast cancer. Comparative analyses of multi-omics profiles from Asian and primarily Caucasian BC cohorts identified distinguishing molecular signatures associated with Asian BCs. Further, many signatures appeared to be specific to non-tumor compartments within bulk tumor, indicating that young Asian BCs may harbor distinctive tumor microenvironment. Citation Format: Yeon Hee Park, Ying Ding, Soo-Hyeon Lee, Hae Hyun Jung, Woosung Chung, Soonweng Cho, Jin-Ho Kim, Shibing Deng, Yoon-la Choi, Julio Fernandez, Se Kyung Lee, Seok Won Kim, Jeong Eon Lee, Ji-Yeon Kim, Jin Seok Ahn, Young-Hyuck Im, Seok Jin Nam, Woong-Yang Park, Zhengyan Kan. Comparative analyses of multi-omics profiles reveal distinctive molecular signatures of young Asian breast cancers [abstract]. In: Proceedings of the American Association for Cancer Research Annual Meeting 2017; 2017 Apr 1-5; Washington, DC. Philadelphia (PA): AACR; Cancer Res 2017;77(13 Suppl):Abstract nr 3370. doi:10.1158/1538-7445.AM2017-3370
    Type of Medium: Online Resource
    ISSN: 0008-5472 , 1538-7445
    URL: Article
    DOI: 10.1158/1538-7445.AM2017-3370
    RVK:
    XA 36000
    RVK:
    XA 10000
    Language: English
    Publisher: American Association for Cancer Research (AACR)
    Publication Date: 2017
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  • 9
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    Abstract 647: TTAC-0001, anti-VEGFR2/KDR monoclonal antibody, inhibits VEGFR signaling and tumor growth in preclinical models
    American Association for Cancer Research (AACR) ; 2011
    In:  Cancer Research Vol. 71, No. 8_Supplement ( 2011-04-15), p. 647-647
    Details
    In: Cancer Research, American Association for Cancer Research (AACR), Vol. 71, No. 8_Supplement ( 2011-04-15), p. 647-647
    Abstract: Tumor angiogenesis is the process that leads to the formation of blood vessels in a tumor and a prognostic indicator in various cancers. Vascular endothelial growth factor (VEGF) and its receptors are considered to be primary regulators of tumor-induced angiogenesis and activation of VEGFR2/KDR is the major signaling pathway for tumor growth. In addition, VEGFR2/KDR is also expressed in many cancer cells, and regulates cell growth and survival through autocrine pathway. In this study, we evaluated the therapeutic potential of TTAC-0001, fully human antibody against VEGFR2/KDR, for the inhibition of tumor growth. In the tube formation assay using HUVEC, TTAC-0001 exhibited a potent anti-angiogenic activity in vitro. In U-87 MG glioblastoma cells, TTAC-0001 significantly inhibited the phosphorylation of VEGFR2/KDR mediated by VEGF. To reveal in vivo efficacy, we have tested TTAC-0001 in glioblastoma and colorectal xenograft models. We demonstrated that antitumor activity of TTAC-0001 in preclinical models correlated with induction of growth arrest and apoptosis as well as the inhibition of angiogenesis. Currently, we are evaluating the combination of TTAC-0001 with chemotherapeutic agents in xenograft models. A single dose study performed in mouse allowed us to establish the relationship between the pharmacokinetics (PK) and efficacy of TTAC-0001. Taken together, our data suggest that targeting VEGFR2 pathway by TTAC-0001 would be a promising candidate for the treatment of cancer. (This study was supported by grants of the Korea Healthcare technology R & D Project, Ministry for Health & Welfare Affairs (A092255 and A040016) and Advanced Medi-cluster R & D Project, DaejeonTechnoPark, Republic of Korea. Seol HJ and Nam DH are co-corresponding authors for this manuscript.) Citation Format: {Authors}. {Abstract title} [abstract]. In: Proceedings of the 102nd Annual Meeting of the American Association for Cancer Research; 2011 Apr 2-6; Orlando, FL. Philadelphia (PA): AACR; Cancer Res 2011;71(8 Suppl):Abstract nr 647. doi:10.1158/1538-7445.AM2011-647
    Type of Medium: Online Resource
    ISSN: 0008-5472 , 1538-7445
    URL: Article
    DOI: 10.1158/1538-7445.AM2011-647
    RVK:
    XA 36000
    RVK:
    XA 10000
    Language: English
    Publisher: American Association for Cancer Research (AACR)
    Publication Date: 2011
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  • 10
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    Somatic Mutations of ERBB2 Kinase Domain in Gastric, Colorectal, and Breast Carcinomas
    American Association for Cancer Research (AACR) ; 2006
    In:  Clinical Cancer Research Vol. 12, No. 1 ( 2006-01-01), p. 57-61
    Details
    In: Clinical Cancer Research, American Association for Cancer Research (AACR), Vol. 12, No. 1 ( 2006-01-01), p. 57-61
    Abstract: Purpose: Recent reports revealed that the kinase domain of the ERBB2 gene is somatically mutated in lung adenocarcinoma, suggesting the mutated ERBB2 gene as an oncogene in human cancers. However, because previous reports focused the mutational search of ERBB2 primarily on lung cancers, the data on ERBB2 mutations in other types of human cancers have been largely unknown. Experimental Design: Here, we did a mutational analysis of the ERBB2 kinase domain by PCR single-strand conformational polymorphism assay in gastric, colorectal, and breast carcinoma tissues. Results: We detected the ERBB2 kinase domain mutations in 9 of 180 gastric carcinomas (5.0%), in 3 of 104 colorectal carcinomas (2.9%), and in 4 of 94 breast carcinomas (4.3%). All of the detected ERBB2 mutations except for one in-frame deletion mutation were missense mutations. Of the 16 ERBB2 mutations detected, 4 affected Val777 in the exon 20 site, and 3 affected Leu755 in the exon 19 site. We simultaneously analyzed the somatic mutations of EGFR, K-RAS, PIK3CA, and BRAF genes in the 16 samples with ERBB2 mutations, and found that all of the 3 colorectal carcinoma samples with ERBB2 mutations harbored K-RAS mutations. Conclusion: This study showed that in addition to lung adenocarcinomas, ERBB2 kinase domain mutation occurs in other common human cancers such as gastric, breast, and colorectal cancers, and suggested that alterations of ERBB2-mediated signaling pathway by ERBB2 mutations alone or together with K-RAS mutations may contribute to the development of human cancers.
    Type of Medium: Online Resource
    ISSN: 1078-0432 , 1557-3265
    URL: Article
    DOI: 10.1158/1078-0432.CCR-05-0976
    RVK:
    XA 36791
    Language: English
    Publisher: American Association for Cancer Research (AACR)
    Publication Date: 2006
    detail.hit.zdb_id: 1225457-5
    detail.hit.zdb_id: 2036787-9
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