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Wei Z, Wang R, Yin X, Zhang L, Lei Y, Zhang Y, Li Y, Wu J, Bu Y, Jin G, Zhang C. PRR11 induces filopodia formation and promotes cell motility via recruiting ARP2/3 complex in non-small cell lung cancer cells. Genes Dis 2022; 9:230-44. [PMID: 35005120 DOI: 10.1016/j.gendis.2021.02.012] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2020] [Revised: 01/25/2021] [Accepted: 02/21/2021] [Indexed: 12/25/2022] Open
Abstract
Filopodia, a finger-like structure and actin-rich plasma-membrane protrusion at the leading edge of the cell, has important roles in cell motility. However, the mechanisms of filopodia generation are not well-understood via the actin-related protein 2/3 (ARP2/3) complex in Non-Small Cell Lung Cancer (NSCLC) cells. We previously have demonstrated that PRR11 associates with the ARP2/3 complex to regulate cytoskeleton-nucleoskeleton assembly and chromatin remodeling. In this study, we further demonstrate that PRR11 involves in filopodia formation, focal adhesion turnover and cell motility through ARP2/3 complex. Cell phenotype assays revealed that the silencing of PRR11 increased cellular size and inhibited cell motility in NSCLC cells. Mechanistically, PRR11 recruited and co-localized with Arp2 at the membrane protrusion to promote filopodia formation but not lamellipodia formation. Notably, PRR11 mutant deletion of the proline-rich region 2 (amino acid residues 185–200) abrogated the effect of filopodia formation. In addition, PRR11-depletion inhibited filopodial actin filaments assembly and increased the level of active integrin β1 in the cell surface, whereas reduced the phosphorylation level of focal adhesion kinase (FAKY397) to repress focal adhesion turnover and cell motility in NSCLC cells. Taken together, our findings indicate that PRR11 has critical roles in controlling filopodia formation, focal adhesion turnover and cell motility by recruiting ARP2/3 complex, thus dysregualted expression of PRR11 potentially facilitates tumor metastasis in NSCLC cells.
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Mu HY, Gong CY, Zhang RJ, Chen ZH, Zhu SG, Zhao WM. Diterpenoids from Euphorbia helioscopia and their enhancement of NK cell-mediated killing of NSCLC cells. Bioorg Chem 2021; 119:105534. [PMID: 34894576 DOI: 10.1016/j.bioorg.2021.105534] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2021] [Revised: 10/13/2021] [Accepted: 11/28/2021] [Indexed: 12/12/2022]
Abstract
Fourteen previously undescribed diterpenoids, including an unusual diterpenoid (1) with a 9,10-seco-jatrophane skeleton, ten jatrophane-type diterpenoids (2-11), two lathyrane-type diterpenoids (12, 13), and an abietane-type diterpenoid (14), together with thirty-six known ones (15-50), were isolated from the whole plants of Euphorbia helioscopia L. The structures of the new isolates were characterized by spectroscopic methods, single-crystal X-ray diffraction analysis, and computational prediction of ECD and chemical shifts. Thirty-nine abundant diterpenoids were evaluated for their enhancement of NK cell-mediated killing of NSCLC cells. As a result, compounds 24, 33, and 41 were found to significantly enhance the killing activity of NK cells towards H1299-luci cells and A549-luci cells at the concentration of 2.5 μM.
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Affiliation(s)
- Hong-Yan Mu
- Natural Product Research Center, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, People's Republic of China; University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Chen-Yuan Gong
- Center for Traditional Chinese Medicine and Immunology Research School of Basic Medical Sciences, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, People's Republic of China; Department of Immunology and Pathogenic Biology, School of Basic Medical Sciences, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, People's Republic of China
| | - Ru-Jun Zhang
- Natural Product Research Center, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, People's Republic of China
| | - Zhen-Hua Chen
- Natural Product Research Center, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, People's Republic of China
| | - Shi-Guo Zhu
- Center for Traditional Chinese Medicine and Immunology Research School of Basic Medical Sciences, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, People's Republic of China; Department of Immunology and Pathogenic Biology, School of Basic Medical Sciences, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, People's Republic of China.
| | - Wei-Min Zhao
- Natural Product Research Center, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, People's Republic of China; University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China.
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Xie X, Zu X, Laster K, Dong Z, Kim DJ. 2,6-DMBQ suppresses cell proliferation and migration via inhibiting mTOR/AKT and p38 MAPK signaling pathways in NSCLC cells. J Pharmacol Sci 2021; 145:279-288. [PMID: 33602509 DOI: 10.1016/j.jphs.2021.01.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2020] [Revised: 12/31/2020] [Accepted: 01/05/2021] [Indexed: 02/06/2023] Open
Abstract
2,6-Dimethoxy-1,4-benzoquinone (2,6-DMBQ) is the major bioactive compound found in fermented wheat germ extract. Although fermented wheat germ extract has been reported to show anti-proliferative and anti-metabolic effects in various cancers, the anticancer potential and molecular mechanisms exerted by 2,6-DMBQ have not been investigated in non-small cell lung cancer (NSCLC) cells. Here, we report that 2,6-DMBQ suppresses NSCLC cell growth and migration through inhibiting activation of AKT and p38 MAPK. 2,6-DMBQ significantly suppressed anchorage-dependent and independent cell growth. Additionally, 2,6-DMBQ induced G2 phase cell cycle arrest through inhibiting the expression and phosphorylation of cyclin B1 and CDC2, respectively. Furthermore, 2,6-DMBQ strongly suppressed NSCLC cell migration through induction of E-cadherin expression. To determine the molecular mechanism(s) exerted by 2,6-DMBQ upon NSCLC cell lines, various signaling kinases were screened; the results indicate that 2,6-DMBQ strongly inhibits the phosphorylation of AKT and p38 MAPK. Additionally, the growth kinetics of cells treated with an AKT or p38 MAPK inhibitor in combination with 2,6-DMBQ indicate that 2,6-DMBQ suppresses NSCLC cell growth and migration through inhibition of AKT and p38 MAPK. Taken together, our results suggest that 2,6-DMBQ is a potential anticancer reagent against NSCLC cells and could be useful for treating lung cancer patients.
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Affiliation(s)
- Xiaomeng Xie
- Department of Pathophysiology, School of Basic Medical Sciences, Academy of Medical Science, College of Medicine, Zhengzhou University, Zhengzhou, Henan, 450008, China; China-US (Henan) Hormel Cancer Institute, Zhengzhou, Henan, 450008, China
| | - Xueyin Zu
- Department of Pathophysiology, School of Basic Medical Sciences, Academy of Medical Science, College of Medicine, Zhengzhou University, Zhengzhou, Henan, 450008, China; China-US (Henan) Hormel Cancer Institute, Zhengzhou, Henan, 450008, China
| | - Kyle Laster
- China-US (Henan) Hormel Cancer Institute, Zhengzhou, Henan, 450008, China
| | - Zigang Dong
- Department of Pathophysiology, School of Basic Medical Sciences, Academy of Medical Science, College of Medicine, Zhengzhou University, Zhengzhou, Henan, 450008, China; China-US (Henan) Hormel Cancer Institute, Zhengzhou, Henan, 450008, China; The Collaborative Innovation Center of Henan Province for Cancer Chemoprevention, Zhengzhou, Henan, 450008, China; The Affiliated Cancer Hospital, Zhengzhou University, Zhengzhou, Henan, 450008, China; International Joint Research Center of Cancer Chemoprevention, Zhengzhou, China
| | - Dong Joon Kim
- Department of Pathophysiology, School of Basic Medical Sciences, Academy of Medical Science, College of Medicine, Zhengzhou University, Zhengzhou, Henan, 450008, China; China-US (Henan) Hormel Cancer Institute, Zhengzhou, Henan, 450008, China; The Collaborative Innovation Center of Henan Province for Cancer Chemoprevention, Zhengzhou, Henan, 450008, China.
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An W, Yao S, Sun X, Hou Z, Lin Y, Su L, Liu X. Glucocorticoid modulatory element-binding protein 1 (GMEB1) interacts with the de-ubiquitinase USP40 to stabilize CFLAR L and inhibit apoptosis in human non-small cell lung cancer cells. J Exp Clin Cancer Res 2019; 38:181. [PMID: 31046799 DOI: 10.1186/s13046-019-1182-3] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2018] [Accepted: 04/17/2019] [Indexed: 02/05/2023] Open
Abstract
Background GMEB1 was originally identified via its interaction with GMEB2, which binds to the promoter region of the tyrosine aminotransferase (TAT) gene and modulates transactivation of the glucocorticoid receptor gene. In the cytosol, GMEB1 interacts with and inhibits CASP8, but the molecular mechanism is currently unknown. Methods Human non-small cell lung cancer cells and 293FT cells were used to investigate the function of GMEB1/USP40/CFLARL complex by WB, GST Pull-Down Assay, Immunoprecipitation, Immunofluorescence and Flow cytometry analysis. A549 cells overexpressing green fluorescent protein and GMEB1 shRNA were used for tumor xenograft using female athymic nu/nu 4-week-old mice. Results We found GMEB1 interacted with CFLARL (also known as c-FLIPL) in the cytosol and promoted its stability. USP40 targeted CFLARL for K48-linked de-ubiquitination. GMEB1 promoted the binding of USP40 to CFLARL. USP40 knockdown did not increase CFLARL protein level despite GMEB1 overexpression, suggesting GMEB1 promotes CFLARL stability via USP40. Additionally, GMEB1 inhibited the activation of pro-caspase 8 and apoptosis in non-small cell lung cancer (NSCLC) cell via CFLARL stabilization. Also, GMEB1 inhibited the formation of DISC upon TRAIL activation. CFLARL enhanced the binding of GMEB1 and CASP8. Downregulation of GMEB1 inhibited A549 xenograft tumor growth in vivo. Conclusions Our findings show the de-ubiquitinase USP40 regulates the ubiquitination and degradation of CFLARL; and GMEB1 acts as a bridge protein for USP40 and CFLARL. Mechanistically, we found GMEB1 inhibits the activation of CASP8 by modulating ubiquitination and degradation of CFLARL. These findings suggest a novel strategy to induce apoptosis through CFLARL targeting in human NSCLC cells. Electronic supplementary material The online version of this article (10.1186/s13046-019-1182-3) contains supplementary material, which is available to authorized users.
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González Rubio S, Montero Pastor N, García C, Almendro-Vedia VG, Ferrer I, Natale P, Paz-Ares L, Lillo MP, López-Montero I. Enhanced Cytotoxic Activity of Mitochondrial Mechanical Effectors in Human Lung Carcinoma H520 Cells: Pharmaceutical Implications for Cancer Therapy. Front Oncol 2018; 8:514. [PMID: 30483474 PMCID: PMC6242888 DOI: 10.3389/fonc.2018.00514] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2018] [Accepted: 10/22/2018] [Indexed: 11/26/2022] Open
Abstract
Cancer cell mitochondria represent an attractive target for oncological treatment as they have unique hallmarks that differ from their healthy counterparts, as the presence of a stronger membrane potential that can be exploited to specifically accumulate cytotoxic cationic molecules. Here, we explore the selective cytotoxic effect of 10-N-nonyl acridine orange (NAO) on human lung carcinoma H520 cells and compare them with healthy human lung primary fibroblasts. NAO is a lipophilic and positively charged molecule that promotes mitochondrial membrane adhesion that eventually leads to apoptosis when incubated at high micromolar concentration. We found an enhanced cytotoxicity of NAO in H520 cancer cells. By means Fluorescence lifetime imaging microscopy (FLIM) we also confirmed the formation of H-dimeric aggregates originating from opposing adjacent membranes that interfere with the mitochondrial membrane structure. Based on our results, we suggest the mitochondrial membrane as a potential target in cancer therapy to mechanically control the cell proliferation of cancer cells.
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Affiliation(s)
- Sergio González Rubio
- Departamento de Química Física, Universidad Complutense de Madrid, Madrid, Spain.,Instituto de Investigación Hospital 12 de Octubre (i+12), Madrid, Spain
| | - Nuria Montero Pastor
- Departamento de Química Física, Universidad Complutense de Madrid, Madrid, Spain.,Instituto de Investigación Hospital 12 de Octubre (i+12), Madrid, Spain
| | - Carolina García
- Departamento de Química Física Biológica, Instituto de Química-Física "Rocasolano" (CSIC), Madrid, Spain
| | - Víctor G Almendro-Vedia
- Departamento de Química Física, Universidad Complutense de Madrid, Madrid, Spain.,Instituto de Investigación Hospital 12 de Octubre (i+12), Madrid, Spain
| | - Irene Ferrer
- Instituto de Investigación Hospital 12 de Octubre (i+12), Madrid, Spain.,Centro Nacional de Investigaciones Oncológicas (CNIO), Madrid, Spain
| | - Paolo Natale
- Departamento de Química Física, Universidad Complutense de Madrid, Madrid, Spain.,Instituto de Investigación Hospital 12 de Octubre (i+12), Madrid, Spain
| | - Luis Paz-Ares
- Instituto de Investigación Hospital 12 de Octubre (i+12), Madrid, Spain.,Centro Nacional de Investigaciones Oncológicas (CNIO), Madrid, Spain.,Departamento de Medicina, Universidad Complutense de Madrid, Madrid, Spain.,Ciberonc, Madrid, Spain
| | - M Pilar Lillo
- Departamento de Química Física Biológica, Instituto de Química-Física "Rocasolano" (CSIC), Madrid, Spain
| | - Iván López-Montero
- Departamento de Química Física, Universidad Complutense de Madrid, Madrid, Spain.,Instituto de Investigación Hospital 12 de Octubre (i+12), Madrid, Spain
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Xu ZH, Liu CH, Hang JB, Gao BL, Hu JA. Rituximab effectively reverses Tyrosine kinase inhibitors (TKIs) resistance through inhibiting the accumulation of rictor on mitochondria-associated ER-membrane (MAM). Cancer Biomark 2018; 20:581-588. [PMID: 28946557 DOI: 10.3233/cbm-170575] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Tyrosine kinase inhibitors (TKIs), a novel group of target-specific anti lung cancer drugs, have recently been found to resistant to some NSCLC cells which have the T790M EGFR mutation. However, recent investigations on the therapies of resistance to EGFR-TKIs are very limited. Therefore, it is important to develop more effective therapies to reverse EGFR-TKIs resistance. In our present study, erlotinib was used as the TKIs drug and the effects of the erlotinib on cell growth were evaluated. Cell viability and concentration dependent studies were performed using HCI-H1975 and HCI-H1299 cells alone with erlotinib, respectively. Further combined with rituximab, the results showed that erlotinib and rituximab were significantly inhibited the cell growth. Furthermore, the combination of erlotinib and rituximab greatly decreased the expression of p-mTOR and p-EGFR. Additional results from western blotting and immunofluorescence assays demonstrated that the accumulation of rictor was also decreased on MAM. Thus, all these results suggested that EGFR-TKIs combined with CD20 mono-antibody significantly decrease the cell growth of H1975 cells and H1299, with T790M EGFR mutation, and inhibit the localization of the key mTOR pathway proteins to MAM. So, it may be a promising strategy for overcoming EGFR TKI resistance in NSCLC patients.
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Affiliation(s)
- Zhi-Hong Xu
- Department of Geriatrics, Ruijin Hospital, Shanghai Jiaotong University, Shanghai, China
| | - Cai-Hong Liu
- Department of Geriatrics, Ruijin Hospital, Shanghai Jiaotong University, Shanghai, China
| | - Jun-Biao Hang
- Department of Thoracic Surgery, Ruijin Hospital, Shanghai Jiaotong University, Shanghai, China
| | - Bei-Li Gao
- Department of Respiration, Ruijin Hospital, Shanghai Jiaotong University, Shanghai, China
| | - Jia-An Hu
- Department of Geriatrics, Ruijin Hospital, Shanghai Jiaotong University, Shanghai, China
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Ding CZ, Guo XF, Wang GL, Wang HT, Xu GH, Liu YY, Wu ZJ, Chen YH, Wang J, Wang WG. High glucose contributes to the proliferation and migration of non-small cell lung cancer cells via GAS5-TRIB3 axis. Biosci Rep 2018; 38:BSR20171014. [PMID: 29367413 PMCID: PMC5857909 DOI: 10.1042/bsr20171014] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2017] [Revised: 11/29/2017] [Accepted: 01/23/2018] [Indexed: 01/01/2023] Open
Abstract
Despite the growing number of studies exhibited an association of diabetes mellitus (DM) and lung cancer progression, the concrete mechanism of DM aggravating lung cancer has not been elucidated. This study was to investigate whether and how high glucose (HG) contribute to the proliferation and migration of non-small cell lung cancer (NSCLC) cells in vitro. In the present study, we confirmed that HG promoted the proliferation and migration of NSCLC cells, and also induced an anti-apoptosis effect on NSCLC cells. Moreover, HG inhibited the expression of GAS5 in NSCLC cells but elevated the protein level of TRIB3. GAS5 overexpression promoted the degradation of TRIB3 protein by ubiquitination and inhibited the HG induced-proliferation, anti-apoptosis and migration of NSCLC cells. Importantly, TRIB3 overexpression reversed the effects of GAS5 on the HG-treated NSCLC cells. Taken together, down-regulated GAS5 by HG significantly enhanced the proliferation, anti-apoptosis and migration in NSCLC cells through TRIB3, thus promoting the carcinogenesis of NSCLC.
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Affiliation(s)
- Cheng-Zhi Ding
- Department of Thoracic Oncology, Henan Provincial Chest Hospital, Zhengzhou, China
| | - Xu-Feng Guo
- Department of Thoracic Surgery, Shanghai Chest Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai, China
| | - Guo-Lei Wang
- Department of Thoracic Oncology, Henan Provincial Chest Hospital, Zhengzhou, China
| | - Hong-Tao Wang
- Department of Thoracic Oncology, Henan Provincial Chest Hospital, Zhengzhou, China
| | - Guang-Hui Xu
- Department of Thoracic Oncology, Henan Provincial Chest Hospital, Zhengzhou, China
| | - Yuan-Yuan Liu
- Department of Thoracic Surgery, Henan Provincial Chest Hospital, Zhengzhou, China
| | - Zhen-Jiang Wu
- Department of Thoracic Oncology, Henan Provincial Chest Hospital, Zhengzhou, China
| | - Yu-Hang Chen
- Department of Thoracic Oncology, Henan Provincial Chest Hospital, Zhengzhou, China
| | - Jiao Wang
- Division of Endocrinology, Department of Internal Medicine, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Wen-Guang Wang
- Department of Thoracic Oncology, Henan Provincial Chest Hospital, Zhengzhou, China
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Li L, Wang S, Zheng F, Wu W, Hann SS. Chinese herbal medicine Fuzheng Kang-Ai decoction sensitized the effect of gefitinib on inhibition of human lung cancer cells through inactivating PI3-K/Akt -mediated suppressing MUC1 expression. J Ethnopharmacol 2016; 194:918-929. [PMID: 27989877 DOI: 10.1016/j.jep.2016.10.077] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/15/2016] [Revised: 10/17/2016] [Accepted: 10/24/2016] [Indexed: 06/06/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Chinese herbal medicine (CHM) Fuzheng Kang-Ai (FZKA for short) decoction has been used as adjuvant treatment strategies in lung cancer patients for decades. However, the molecular mechanism underlying the therapeutic potential especially in sensitizing the effect of EGFR-TKI gefitinib has not been well elucidated. MATERIALS AND METHODS Cell viability was detected by MTT assay. Cell cycle distribution was detected by flow cytometry. Western blot were used to examine phosphorylation and protein levels of Akt, p65, p50 and MUC1. The mRNA level of MUC1 was measured by qRT-PCR. Transient transfection experiments were used to overexpression of Akt, p65 and MUC1. Tumor xenograft and bioluminescent imaging experiments were carried out to confirm the in vitro findings. RESULTS Cell viability was inhibited by FZKA treatment and showed more significant when treated with FZKA and gefitinib in combine in lung cancer cells. FZKA induced the cell arrest at G0/G1 phase. Mechanistically, we showed that the phosphorylation of Akt, protein expressions of p65 and MUC1 were suppressed by FZKA and even more responses were observed in the FZKA and gefitinib combining. Overexpressed Akt overcame the effect of FZKA on p65 protein, and exogenously expressed p65 resisted the inhibitory effect of MUC1 protein expression by FZKA. On the contrary, while overexpressed MUC1 had no effect on p65 expression, it feedback increased phosphorylation of Akt, and more importantly, reversed the cell growth inhibition affected by FZKA. In line with the above, our results confirmed the synergistic effects of FZKA and gefitinib combination on tumor growth, the phosphorylation of Akt, and protein expression of p65 and MUC1 in vivo. CONCLUSION This study shows that FZKA decoction inhibits the growth of NSCLC cells through Akt-mediated inhibition of p65, followed by reducing the expression of MUC1. More importantly, there is a synergistic effect of FZKA decoction and gefitinib combination with greater suppression. The positive feedback regulatory loop of MUC1 to Akt signaling pathway further added the important role of MUC1 in mediating the overall responses of FZKA decoction in this process. The in vitro and in vivo study provides an additional and a novel mechanism by which the FZKA decoction enhances the growth inhibition of gefitinib in gefitinib-resistant NSCLC cells.
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Affiliation(s)
- Longmei Li
- Laboratory of Tumor Molecular Biology and Targeted Therapies of TCM, China; Department of Medical Oncology, Guangdong Provincial Hospital of Chinese Medicine, The Second Clinical Medical Collage, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong Province 510120, China
| | - SuMei Wang
- Department of Medical Oncology, Guangdong Provincial Hospital of Chinese Medicine, The Second Clinical Medical Collage, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong Province 510120, China
| | - Fang Zheng
- Laboratory of Tumor Molecular Biology and Targeted Therapies of TCM, China
| | - WanYin Wu
- Department of Medical Oncology, Guangdong Provincial Hospital of Chinese Medicine, The Second Clinical Medical Collage, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong Province 510120, China.
| | - Swei Sunny Hann
- Laboratory of Tumor Molecular Biology and Targeted Therapies of TCM, China; Department of Medical Oncology, Guangdong Provincial Hospital of Chinese Medicine, The Second Clinical Medical Collage, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong Province 510120, China.
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Yang P, Cartwright C, Chan D, Ding J, Felix E, Pan Y, Pang J, Rhea P, Block K, Fischer SM, Newman RA. Anticancer activity of fish oils against human lung cancer is associated with changes in formation of PGE2 and PGE3 and alteration of Akt phosphorylation. Mol Carcinog 2013; 53:566-77. [PMID: 23371504 DOI: 10.1002/mc.22008] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2012] [Revised: 12/18/2012] [Accepted: 01/04/2013] [Indexed: 11/08/2022]
Abstract
The beneficial effects of omega-3 fatty acids are believed to be due in part to selective alteration of arachidonate metabolism that involves cyclooxygenase (COX) enzymes. Here we investigated the effect of eicosapentaenoic acid (EPA) on the proliferation of human non-small cell lung cancer A549 (COX-2 over-expressing) and H1299 (COX-2 null) cells as well as their xenograft models. While EPA inhibited 50% of proliferation of A549 cells at 6.05 µM, almost 80 µM of EPA was needed to reach similar levels of inhibition of H1299 cells. The formation of prostaglandin (PG)E3 in A549 cells was almost threefold higher than that of H1299 cells when these cells were treated with EPA (25 µM). Intriguingly, when COX-2 expression was reduced by siRNA or shRNA in A549 cells, the antiproliferative activity of EPA was reduced substantially compared to that of control siRNA or shRNA transfected A549 cells. In line with this, dietary menhaden oil significantly inhibited the growth of A549 tumors by reducing tumor weight by 58.8 ± 7.4%. In contrast, a similar diet did not suppress the development of H1299 xenograft. Interestingly, the ratio of PGE3 to PGE2 in A549 was about 0.16 versus only 0.06 in H1299 xenograft tissues. Furthermore, PGE2 up-regulated expression of pAkt, whereas PGE3 downregulated expression of pAkt in A549 cells. Taken together, the results of our study suggest that the ability of EPA to generate PGE3 through the COX-2 enzyme might be critical for EPA-mediated tumor growth inhibition which is at least partly due to down-regulation of Akt phosphorylation by PGE3.
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Affiliation(s)
- Peiying Yang
- Department of General Oncology, The University of Texas, M.D. Anderson Cancer Center, Houston, Texas
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