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Lee S, Ki CS. Proteolytically degradable PEG hydrogel matrix mimicking tumor immune microenvironment for 3D co-culture of lung adenocarcinoma cells and macrophages. J Biomater Sci Polym Ed 2023; 34:1981-1999. [PMID: 37071065 DOI: 10.1080/09205063.2023.2204778] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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: 02/16/2023] [Accepted: 04/17/2023] [Indexed: 04/19/2023]
Abstract
Tumor-associated macrophages and monocytes are the major stromal cell types found in the tumor immune microenvironment (TIME), which modulates tumor progression, invasion, and chemoresistance. To address the need for an in vitro three-dimensional tumor model for understanding the complex cellular interactions within the TIME, we propose a TIME-mimetic co-culture matrix composed of photo-crosslinked poly(ethylene glycol) hydrogels mimicking the characteristics of the tumor and stroma. Desmoplasia-mimetic microgels encapsulating lung adenocarcinoma cells (A549) were embedded with monocyte- or macrophage-type U937 cells in normal stroma-mimetic hydrogel, increasing the proximity between the two cell types. By modulating the proteolytic degradability of the hydrogels, we could separate different cell types with high purities for use in orthogonal assays. In addition, we demonstrated that U937 cells had distinct influences on A549 cell death depending on their activation states (i.e. monocyte, M0, or M1 phenotype). M1 macrophages suppressed tumor growth and increased the susceptibility of A549 cells to cisplatin. In contrast, monocytes upregulated cancer stem cell markers (OCT4, SOX2, and SHH) of A549 cells, showing M2-like features, such as downregulated expression of proinflammatory markers (IL6 and TNFα). These findings suggest that this co-culture system is potentially used for investigation of heterotypic cellular interactions in the TIME.
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Affiliation(s)
- Sora Lee
- Department of Biosystems & Biomaterials Science and Engineering, Seoul National University, Seoul, Republic of Korea
- Department of Medical Device Evaluation, National Institute of Food and Drug Safety Evaluation, Cheongju, Republic of Korea
| | - Chang Seok Ki
- Department of Biosystems & Biomaterials Science and Engineering, Seoul National University, Seoul, Republic of Korea
- Department of Agriculture, Forestry and Bioresources, Seoul National University, Seoul, Republic of Korea
- Research Institute of Agriculture and Life Science, Seoul National University, Seoul, Republic of Korea
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He J, Xi X, Cao P, Zhou J, Liu H, Li N. Long non-coding RNA GNAS-AS1 knockdown inhibits proliferation and epithelial-mesenchymal transition of lung adenocarcinoma cells via the microRNA-433-3p/Rab3A axis. Open Med (Wars) 2023; 18:20230740. [PMID: 37465347 PMCID: PMC10350893 DOI: 10.1515/med-2023-0740] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2022] [Revised: 03/30/2023] [Accepted: 05/31/2023] [Indexed: 07/20/2023] Open
Abstract
The goal of this study was to demonstrate the functions and specific mechanism of long non-coding RNA (lncRNA) GNAS-AS1 in lung adenocarcinoma. Levels of lncRNA GNAS-AS1, microRNA (miR)-433-3p, and Rab3A were assessed by quantitative real-time PCR (qRT-PCR). The target-binding sites of lncRNA GNAS-AS1, miR-433-3p, and Rab3A were predicted and confirmed by bioinformatics tool (StarBase) and a dual-luciferase reporter system. Cell proliferation and apoptosis were checked using MTT and flow cytometry, respectively. Additionally, the levels of apoptosis-related and epithelial-mesenchymal transition (EMT)-associated genes in A549 cells were analyzed by qRT-PCR and western blot. We found that lncRNA GNAS-AS1 was upregulated, miR-433-3p was low-expressed, and Rab3A was overexpressed in lung adenocarcinoma tissues and cell lines. LncRNA GNAS-AS1 interacted with miR-433-3p and negatively regulated miR-433-3p levels. Rab3A was a direct target of miR-433-3p. Downregulation of lncRNA GNAS-AS1 remarkably suppressed cell proliferation, promoted cell apoptosis, decreased B-cell lymphoma-2 (Bcl-2) expression, enhanced the Bcl-2-Associated X (Bax) level, promoted E-cadherin expression, and reduced N-cadherin and Rab3A levels. However, the miR-433-3p inhibitor reversed all these findings. Similarly, the inhibitory effects of miR-433-3p mimic on A549 cells were reversed by the Rab3A-plasmid. In conclusion, lncRNA GNAS-AS1 downregulation suppressed lung adenocarcinoma cell proliferation and EMT through the miR-433-3p/Rab3A axis.
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Affiliation(s)
- Jing He
- Department of Thoracic Surgery, Taixing People’s Hospital, Taixing, 225400, China
| | - Xiaoxiang Xi
- Department of Thoracic Surgery, Taixing People’s Hospital, No. 1 Changzheng Road, Taixing Town, Taixing, 225400, China
| | - Peng Cao
- Department of Thoracic Surgery, Taixing People’s Hospital, Taixing, 225400, China
| | - Jinxia Zhou
- Department of Thoracic Surgery, Taixing People’s Hospital, Taixing, 225400, China
| | - Hui Liu
- Department of Thoracic Surgery, Taixing People’s Hospital, Taixing, 225400, China
| | - Na Li
- Department of Thoracic Surgery, Taixing People’s Hospital, Taixing, 225400, China
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Liu K, Fu X, Wang Z, Yang L, Yang J, Deng H. Integrating network pharmacology prediction and experimental investigation to verify ginkgetin anti-invasion and metastasis of human lung adenocarcinoma cells via the Akt/GSK-3β/Snail and Wnt/β-catenin pathway. Front Pharmacol 2023; 14:1135601. [PMID: 36937843 PMCID: PMC10018034 DOI: 10.3389/fphar.2023.1135601] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [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: 01/01/2023] [Accepted: 02/22/2023] [Indexed: 03/06/2023] Open
Abstract
Introduction: Lung cancer, one of the most frequent malignancies, has a high death rate and an increased number of new cases globally. Ginkgo biloba has been used for many years in the treatment of lung cancer. Ginkgetin is the key active ingredient extracted from Ginkgo biloba. However, the mechanism by which ginkgetin inhibits the invasive metastasis of lung cancer is unclear. Methods: We used a network pharmacology approach to obtain the molecular mechanism by which ginkgetin inhibits lung cancer metastasis. Then we analyzed potential target proteins between ginkgetin and lung cancer. Finally, we validated with molecular docking and experimental validation. Results: By analyzing the intersecting genes of lung cancer and ginkgetin, there were 79 intersecting genes, which were mainly involved in the positive regulation of cell migration, with the cancer pathway being one of the most enriched pathways. The results of in vitro experiments showed that GK had a large inhibitory effect on cell invasion and metastasis of A549 and H1299. In vivo animals GK had a great inhibitory effect on metastasis of LLC. Conclusion: This study identified the potential related GK molecular targets and signaling pathways in treating human lung cancer using network pharmacological approaches. Experiments confirmed that GK inhibits the Akt/GSK-3β/Snail and Wnt/β-catenin cascade initiation in A549, H1299 and LLC cells, preventing metastasis. This study's results align with the hypotheses derived from the network pharmacology analysis.
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Affiliation(s)
| | | | | | | | - Jia Yang
- *Correspondence: Jia Yang, ; Haibin Deng,
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Abstract
Objective To investigate the effects of miR-490-3p on the proliferation, migration, invasion and apoptosis of lung adenocarcinoma (LUAD) cells through the Wnt/β-catenin signaling pathway. Methods Differentially expressed miRNAs in LUAD tissues were analyzed by bioinformatics and the target miRNA went through GSEA enrichment analysis. qRT-PCR was used to detect the expression of miR-490-3p in human LUAD cells and normal bronchial cells. The constructed vectors were transfected into the LUAD cell lines using Lipofectamine 2000. Cell viability was detected by MTT, cell migration and invasion were detected by transwell assay, and cell apoptosis was detected by flow cytometry. Western blot was performed to detect the expression levels of the proteins related to the Wnt/β-catenin pathway and cell apoptosis. Xenograft tumor mouse models were used for in vivo validation. Results The results of qRT-PCR showed that miR-490-3p was relatively lowly expressed in LUAD cells, and the expression level was different in different LUAD cell lines. The results of MTT, transwell and flow cytometry exhibited that miR-490-3p could significantly inhibit the proliferation, migration, invasion and increase cell apoptosis rate of LUAD cells. Western blot results showed that miR-490-3p promoted the expression of Bax, Caspase-3 and E-cadherin as well as the phosphorylation of GSK-3β and inhibited the expression of Bcl-2, β-catenin and C-myc. Additionally, animal experiments were performed to prove that miR-490-3p suppressed LUAD malignant progression in vivo. Conclusion MiR-490-3p inhibited the proliferation, migration, invasion and promoted the apoptosis of LUAD cells by down-regulating the Wnt/β-catenin signaling pathway, suggesting that miR-490-3p may be an indicator for early diagnosis and prognosis of LUAD.
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Affiliation(s)
- Zhiyong Li
- Department of Comprehensive Therapy, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, People's Republic of China
| | - Danfeng Jiang
- Department of Day Care, Beijing Cancer Hospital, Beijing, People's Republic of China
| | - Sheng Yang
- Department of Medical Oncology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, People's Republic of China
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Chen Z, Gao H, Dong Z, Shen Y, Wang Z, Wei W, Yi J, Wang R, Wu N, Jin S. NRP1 regulates radiation-induced EMT via TGF-β/Smad signaling in lung adenocarcinoma cells. Int J Radiat Biol 2020; 96:1281-1295. [PMID: 32659143 DOI: 10.1080/09553002.2020.1793015] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [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: 01/22/2023]
Abstract
PURPOSE Radiation has been shown to promote the epithelial-mesenchymal transition (EMT) in tumor cells, and TGF-β/Smad and PI3K-Akt signaling pathways play an important role in the EMT. In this study, we investigated the effects of neuropilin-1 (NRP1) on radiation-induced TGF-β/Smad and non-classical Smad signaling pathways in lung cancer cells, as well as the effects of NRP1 on invasion and migration. MATERIALS AND METHODS Changes in the expression levels of EMT markers (β-catenin, N-cadherin, and vimentin) and related transcription factors (Twist and ZEB1) in stably transfected cells were detected by Western blotting and qPCR, and changes were assessed by TGF-β/Smad and non-classical Smad signaling. Immunofluorescence was used to detect the expression of the cytoskeletal protein F-actin. Expression of TGF-β1 and CXCL-12 was detected by ELISA. Transwell and scratch assays were used to detect the invasive ability and migration of lung cancer cells, respectively. RESULTS Our results showed that ionizing radiation could induce the EMT as well as morphological changes in lung adenocarcinoma cells (A549); however, the effects were not significant in lung squamous carcinoma cells (SK-MES-1). Moreover, we showed that NRP1 promotes the EMT induced by ionizing radiation in A549 cells, which may be related to the increased expression of EMT-related transcription factors. NRP1 may promote the radiation-induced EMT of A549 cells mainly through TGF-β1/Smad2/3 signaling. NRP1 also enhanced radiation-induced invasion, migration, and CXCL-12 expression in A549 cells. CONCLUSIONS We conclude that NRP1 promotes radiation-induced EMT in lung adenocarcinoma cells via TGF-β1/Smad signaling and not non-classical Smad signaling, and enhances the invasion and migration of lung adenocarcinoma cells.
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Affiliation(s)
- ZhiYuan Chen
- School of Public Health, NHC Key Laboratory of Radiobiology, Jilin University, Changchun, Jilin, China.,Tianjin Key Laboratory of Radiation Medicine and Molecular Nuclear Medicine, Institute of Radiation Medicine, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin, China
| | - Hui Gao
- School of Public Health, NHC Key Laboratory of Radiobiology, Jilin University, Changchun, Jilin, China.,Department of Orthopedics, The First Hospital of Jilin University, Changchun, China
| | - Zhuo Dong
- School of Public Health, NHC Key Laboratory of Radiobiology, Jilin University, Changchun, Jilin, China
| | - YanNan Shen
- School of Public Health, NHC Key Laboratory of Radiobiology, Jilin University, Changchun, Jilin, China
| | - ZhiCheng Wang
- School of Public Health, NHC Key Laboratory of Radiobiology, Jilin University, Changchun, Jilin, China
| | - Wei Wei
- School of Public Health, NHC Key Laboratory of Radiobiology, Jilin University, Changchun, Jilin, China
| | - JunXuan Yi
- School of Public Health, NHC Key Laboratory of Radiobiology, Jilin University, Changchun, Jilin, China
| | - Rui Wang
- School of Public Health, NHC Key Laboratory of Radiobiology, Jilin University, Changchun, Jilin, China
| | - Ning Wu
- Department of Radiation Oncology, China-Japan Union Hospital of Jilin University, Changchun, China
| | - Shunzi Jin
- School of Public Health, NHC Key Laboratory of Radiobiology, Jilin University, Changchun, Jilin, China
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Han F, Huang D, Huang X, Wang W, Yang S, Chen S. Exosomal microRNA-26b-5p down-regulates ATF2 to enhance radiosensitivity of lung adenocarcinoma cells. J Cell Mol Med 2020; 24:7730-7742. [PMID: 32476275 PMCID: PMC7348161 DOI: 10.1111/jcmm.15402] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [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: 11/26/2019] [Revised: 02/28/2020] [Accepted: 04/05/2020] [Indexed: 12/28/2022] Open
Abstract
Lung adenocarcinoma (LUAD), as the most common subtype of non‐small cell lung cancer, is responsible for more than 500 000 deaths worldwide annually. In this study, we identify a novel microRNA‐26b‐5p (miR‐26b‐5p) and elucidated its function on LUAD. The survival rate of parent LUAD cells and radiation‐resistant LUAD cells were determined using clonogenic survival assay. We overexpressed or inhibited miR‐26b‐5p in LUAD, and the correlation between activating transcription factor 2 (ATF2) and miR‐26b‐5p was determined using integrated bioinformatics analysis and dual‐luciferase reporter gene assay. Exosomes derived from A549 cell lines were then detected using Western blot assay, followed by co‐transfection with radiation‐resistant A549R cells. LUAD tissues and serum were collected, followed by miR‐26b‐5p relative expression quantification using RT‐qPCR. miR‐26b‐5p was identified as the most differentially expressed miRNA and was down‐regulated in LUAD. Radiation‐resistant cells were more resistant to X‐radiation compared with parent cells. miR‐26b‐5p overexpression and X‐irradiation led to enhanced radiosensitivity of LUAD cells. ATF2 was negatively targeted by miR‐26b‐5p. Exosomal miR‐26b‐5p derived from A549 cells could be transported to irradiation‐resistant LUAD cells and inhibit ATF2 expression to promote DNA damage, apoptosis and radiosensitivity of LUAD cells, which was verified using serum‐based miR‐26b‐5p. Our results show a regulatory network of miR‐26b‐5p on radiosensitivity of LUAD cells, which may serve as a non‐invasive biomarker for LUAD.
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Affiliation(s)
- Fushi Han
- Department of Nuclear Medicine, Tongji Hospital, Tongji University School of Medicine, Shanghai, China
| | - Dongdong Huang
- Department of Emergency Medicine, Shanghai Pulmonary Hospital, Tongji University School of Medicine, Shanghai, China
| | - Xinghong Huang
- Department of Radiology, Tongji Hospital, Tongji University School of Medicine, Shanghai, China
| | - Wei Wang
- Department of Internal Medicine, Tongji Hospital, Tongji University School of Medicine, Shanghai, China
| | - Shusong Yang
- Department of Radiotherapy, Tongji Hospital, Tongji University School of Medicine, Shanghai, China
| | - Shuzhen Chen
- Department of Nuclear Medicine, Tongji Hospital, Tongji University School of Medicine, Shanghai, China
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Tian M, Jin L, Li R, Zhu S, Ji M, Li W. Comparison of oxycodone and morphine on the proliferation, apoptosis and expression of related molecules in the A549 human lung adenocarcinoma cell line. Exp Ther Med 2016; 12:559-566. [PMID: 27446244 PMCID: PMC4950733 DOI: 10.3892/etm.2016.3346] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [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: 02/18/2015] [Accepted: 10/13/2015] [Indexed: 12/20/2022] Open
Abstract
The present study aimed to compare the effects of oxycodone and morphine hydrochloride on the proliferation, apoptosis and migration of A549 lung cancer cells. A549 human lung cancer cells were cultured in vitro and treated with oxycodone or morphine at various concentrations (10, 20 and 40 µg/ml). Cell migration was determined using a wound healing assay, whereas apoptosis was detected using flow cytometry. Reverse transcription quantitative-polymerase chain reaction was performed in order to assess the apoptosis-related gene expression levels, including p53, B-cell lymphoma (Bcl)-2 and Bcl-2-associated X protein (Bax). The levels of vascular endothelial growth factor (VEGF) and urokinase-type plasminogen activator (uPA) were detected using enzyme-linked immunosorbent assays. The expression levels of intercellular cell adhesion molecule (ICAM)-1 were determined by immunofluorescence. In the present study, oxycodone and morphine induced apoptosis in A549 lung cancer cells with similar potency; however, >20 µg/ml oxycodone was more effective at inhibiting cell proliferation (P<0.05) and migration (P<0.05), as compared with morphine at the same concentration. Oxycodone induced a dose-dependent increase in the expression levels of p53 and Bax apoptosis-related genes, whereas it decreased the gene expression levels of Bcl-2. Furthermore, oxycodone decreased, whereas morphine increased, the expression levels of ICAM-1 in a concentration-dependent manner. In addition, at 40 µg/ml, the expression levels of VEGF and uPA in the morphine group were significantly higher than those demonstrated in the oxycodone group (P<0.05). In conclusion, oxycodone was more effective in inhibiting the proliferation and migration of A549 lung cancer cells, as compared with morphine.
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Affiliation(s)
- Mi Tian
- Department of Anesthesiology, Jinling Hospital, School of Medicine, Nanjing University, Nanjing, Jiangsu 210002, P.R. China
| | - Li Jin
- Department of Anesthesiology, Jinling Hospital, School of Medicine, Nanjing University, Nanjing, Jiangsu 210002, P.R. China
| | - Renqi Li
- Department of Anesthesiology, Jinling Hospital, School of Medicine, Nanjing University, Nanjing, Jiangsu 210002, P.R. China
| | - Sihai Zhu
- Department of Anesthesiology, Jinling Hospital, School of Medicine, Nanjing University, Nanjing, Jiangsu 210002, P.R. China
| | - Muhuo Ji
- Department of Anesthesiology, Jinling Hospital, School of Medicine, Nanjing University, Nanjing, Jiangsu 210002, P.R. China
| | - Weiyan Li
- Department of Anesthesiology, Jinling Hospital, School of Medicine, Nanjing University, Nanjing, Jiangsu 210002, P.R. China
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Hsiao KY, Wu YJ, Liu ZN, Chuang CW, Huang HH, Kuo SM. Anticancer Effects of Sinulariolide-Conjugated Hyaluronan Nanoparticles on Lung Adenocarcinoma Cells. Molecules 2016; 21:297. [PMID: 26950100 PMCID: PMC6274027 DOI: 10.3390/molecules21030297] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2016] [Revised: 02/25/2016] [Accepted: 02/26/2016] [Indexed: 12/23/2022] Open
Abstract
Lung cancer is one of the most clinically challenging malignant diseases worldwide. Sinulariolide (SNL), extracted from the farmed coral species Sinularia flexibilis, has been used for suppressing malignant cells. For developing anticancer therapeutic agents, we aimed to find an alternative for non-small cell lung cancer treatment by using SNL as the target drug. We investigated the SNL bioactivity on A549 lung cancer cells by conjugating SNL with hyaluronan nanoparticles to form HA/SNL aggregates by using a high-voltage electrostatic field system. SNL was toxic on A549 cells with an IC50 of 75 µg/mL. The anticancer effects of HA/SNL aggregates were assessed through cell viability assay, apoptosis assays, cell cycle analyses, and western blotting. The size of HA/SNL aggregates was approximately 33–77 nm in diameter with a thin continuous layer after aggregating numerous HA nanoparticles. Flow cytometric analysis revealed that the HA/SNL aggregate-induced apoptosis was more effective at a lower SNL dose of 25 µg/mL than pure SNL. Western blotting indicated that caspases-3, -8, and -9 and Bcl-xL and Bax played crucial roles in the apoptotic signal transduction pathway. In summary, HA/SNL aggregates exerted stronger anticancer effects on A549 cells than did pure SNL via mitochondria-related pathways.
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Affiliation(s)
- Kuan Yin Hsiao
- Department of Biomedical Engineering, College of Medicine, I-Shou University, Kaohsiung City 82445, Taiwan.
| | - Yi-Jhen Wu
- Department of Biomedical Engineering, College of Medicine, I-Shou University, Kaohsiung City 82445, Taiwan.
| | - Zi Nong Liu
- Department of Biomedical Engineering, College of Medicine, I-Shou University, Kaohsiung City 82445, Taiwan.
| | - Chin Wen Chuang
- Department of Electric Engineering, College of Electrical and Information Engineering, I-Shou University, Kaohsiung City 84001, Taiwan.
| | - Han Hsiang Huang
- Department of Veterinary Medicine, College of Agriculture, National Chiayi University, Chiayi City 60054, Taiwan.
| | - Shyh Ming Kuo
- Department of Biomedical Engineering, College of Medicine, I-Shou University, Kaohsiung City 82445, Taiwan.
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Liu Y, Liu Y, Zhang H, Sun C, Zhao Q, Di C, Li H, Gan L, Wang Y. Effects of carbon-ion beam irradiation on the angiogenic response in lung adenocarcinoma A549 cells. Cell Biol Int 2014; 38:1304-10. [PMID: 24942319 DOI: 10.1002/cbin.10327] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [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: 01/23/2014] [Accepted: 05/17/2014] [Indexed: 11/06/2022]
Abstract
Radiotherapy has been focused mainly on killing cancer cells, and little attention has been paid to the process supporting tumor growth and metastasis, including the process of angiogenesis. To investigate the effects of carbon-ion irradiation on angiogenesis in lung cancer cells, we examined the expression of vascular endothelial growth factor and basic fibroblast growth factor in the tumor conditioned medium (TCM) of A549 cells exposed to carbon-ion or X-ray irradiation, as well as endothelial cell growth, invasion, and tube formation induced by TCM. No changes in vascular endothelial growth factor secretion were detected in the TCM of A549 cells exposed to carbon-ion irradiation at 2 or 4 Gy, whereas 1 Gy of irradiation significantly decreased vascular endothelial growth factor and basic fibroblast growth factor levels. Carbon-ion irradiation at 1 Gy inhibited endothelial cell invasion and tube formation. The TCM from A549 cells irradiated with X-ray promoted angiogenesis, whereas the TCM of A549 cells exposed to carbon-ion irradiation at 2 or 4 Gy had no effect. These findings suggest that carbon-ion irradiation at 1 Gy significantly suppressed the process of angiogenesis in vitro by inhibiting endothelial cell invasion and tube formation, which are related to vascular endothelial growth factor and basic fibroblast growth factor production.
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Affiliation(s)
- Yuanyuan Liu
- Department of Radiation Medicine, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, 730000, China; Key Laboratory of Heavy Ion Radiation Biology and Medicine of Chinese Academy of Sciences, Lanzhou, 730000, China; Key Laboratory of Heavy Ion Radiation Medicine of Gansu Province, Lanzhou, 730000, China
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