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Wei W, Bai H, Zhang T, Cai S, Zhou Y, Liu M, Zhang Y, Chen Y, Hua J, He J, Ding N, Miao G, Wang J. Regulation of Circulating miR-342-3p Alleviates the Radiation-Induced Immune System Injury. Radiat Res 2023; 200:556-568. [PMID: 37874034 DOI: 10.1667/rade-23-00125.1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2023] [Accepted: 10/12/2023] [Indexed: 10/25/2023]
Abstract
Ionizing radiation in space, radiation devices or nuclear disasters are major threats to human health and public security. Expanding countermeasures for dealing with accidental or occupational radiation exposure is crucial for the protection of radiation injuries. Circulating microRNAs (miRNAs) have emerged as promising radiation biomarkers in recent years. However, the origin, distribution and functions of radiosensitive circulating miRNAs remain unclear, which obstructs their clinical applications in the future. In this study, we found that mmu-miR-342-3p (miR-342) in mouse serum presents a stable and significant decrease after X-ray total-body irradiation (TBI). Focusing on this miRNA, we investigated the influences of circulating miR-342 on the radiation-induced injury. Through tail vein injection of Cy5-labeled synthetic miR-342, we found the exogenous miR-342-Cy5 was mainly enriched in metabolic and immune organs. Besides, the bioinformatic analysis predicted that miR-342 might involve in immune-related processes or pathways. Further, mice were tail vein injected with synthetic miR-342 mimetics (Ago-miR-342) after irradiation to upregulate the level of miR-342 in circulating blood. The results showed that the upregulation of circulating miR-342 alleviated the radiation-induced depletion of CD3+CD4+ T lymphocytes and influenced the levels of IL-2 and IL-6 in irradiated mice. Moreover, the injection of Ago-miR-342 improved the survival rates of mice with acute radiation injury. Our findings demonstrate that upregulation of circulating miR-342 alleviates the radiation-induced immune system injury, which provides us new insights into the functions of circulating miRNAs and the prospect as the targets for mitigation of radiation injuries.
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Affiliation(s)
- Wenjun Wei
- Biomedical Research Center, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
| | - Hao Bai
- Biomedical Research Center, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
- Laboratory of Radiation Medicine, West China School of Basic Medical Sciences and Forensic Medicine, Sichuan University, Chengdu 610041, China
| | - Tianyi Zhang
- Biomedical Research Center, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
| | - Shufan Cai
- Biomedical Research Center, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
- School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, China
| | - Yumeng Zhou
- School of Life Science and Engineering, Lanzhou University of Technology, Lanzhou 730050, China
| | - Min Liu
- Biomedical Research Center, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
| | - Yanan Zhang
- Biomedical Research Center, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
| | - Yaxiong Chen
- Biomedical Research Center, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
| | - Junrui Hua
- Biomedical Research Center, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
| | - Jinpeng He
- Biomedical Research Center, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
| | - Nan Ding
- Biomedical Research Center, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
| | - GuoYing Miao
- Department of Radiation Oncology, Gansu Provincial Central Hospital, Lanzhou 730000, China
| | - Jufang Wang
- Biomedical Research Center, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
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Zhou E, Liu B, Miao GY, Tan ZQ, Yang M, Xiao XP. [Internal carotid artery injury caused by large metal foreign body at the base of the skull: a case report]. Zhonghua Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2021; 56:390-393. [PMID: 33832200 DOI: 10.3760/cma.j.cn115330-20200508-00389] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- E Zhou
- Department of Otorhinolaryngology Head and Neck Surgery, Hunan Provincial People's Hospital (First Affiliated Hospital of Hunan Normal University), Changsha 410000, China
| | - B Liu
- Department of Otorhinolaryngology Head and Neck Surgery, Hunan Provincial People's Hospital (First Affiliated Hospital of Hunan Normal University), Changsha 410000, China
| | - G Y Miao
- Department of Otorhinolaryngology Head and Neck Surgery, Hunan Provincial People's Hospital (First Affiliated Hospital of Hunan Normal University), Changsha 410000, China
| | - Z Q Tan
- Department of Otorhinolaryngology Head and Neck Surgery, Hunan Provincial People's Hospital (First Affiliated Hospital of Hunan Normal University), Changsha 410000, China
| | - M Yang
- Department of Otorhinolaryngology Head and Neck Surgery, Hunan Provincial People's Hospital (First Affiliated Hospital of Hunan Normal University), Changsha 410000, China
| | - X P Xiao
- Department of Otorhinolaryngology Head and Neck Surgery, Hunan Provincial People's Hospital (First Affiliated Hospital of Hunan Normal University), Changsha 410000, China
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Zhou E, Luo L, Ma LJ, Yin J, Tan ZQ, Miao GY, Liu J, Xiao XP. [Diagnostic value of serum miRNA let-7a for laryngeal carcinoma and effects of let-7a on proliferation and apoptosis of laryngeal carcinoma cells]. Zhonghua Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2019; 54:534-539. [PMID: 31315362 DOI: 10.3760/cma.j.issn.1673-0860.2019.07.010] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To investigate the diagnostic value of serum miRNAlet-7a in laryngeal carcinoma and the effect of let-7a on proliferation and apoptosis of laryngeal carcinoma cells. Methods: Real-time quantitative PCR was used to determine the expression level of serum miRNAlet-7a. The miRNA let-7a mimetic was synthesized and transiently transfected into the laryngeal carcinoma Hep-2 cell line by cationic liposome method. The effects of up-regulation of let-7a expression on laryngeal cancer Hep-2 cells were detected by FCM and MTT assays,respectively. The association of let-7a levels with laryngeal cancer and the diagnostic value for laryngeal cancer were analyzed. Measurement data were taken by t test or analysis of variance; Counting data were analyzed by χ(2) test and Fisher exact probability method. The receiver operating characteristic curve was used to analyze the diagnostic value of let-7a for laryngeal cancer. Results: The relative expression of serum let-7a in healthy subjects was significantly higher than that in patients with laryngeal cancer (0.931±0.094) vs (0.380±0.113) (t=26.507,P<0.01). The relative expressions of serum let-7a in patients with laryngeal cancer before and after surgery were (0.380±0.113) vs(0.493±0.164),with significant difference (t=3.848,P<0.01).The relative expression of serum let-7a was related to lymph node metastasis (t=2.946, P<0.01). There was a positive correlation between the relative expression of let-7a in laryngeal carcinoma and that in serum (r=0.466,P=0.003). After transfection of let-7a mimics, Hep-2 cells showed an increased significant increase in the expression of let-7a (P<0.01), proliferation (P<0.01) and apoptosis (P<0.01). ROC curve analysis showed that the best critical value for relative expression of let-7a in the diagnosis of laryngeal carcinoma was 0.557 with a sensitivity of 0.794,a specificity of 0.727,an area under curve(AUC) of 0.859,and a 95%CI of 0.773-0.926. Conclusions: miRNA let-7a can inhibit the proliferation of laryngeal carcinoma Hep-2 cells and promote apoptosis. Serum let-7a is down-regulated in patients with laryngeal cancer and the level of let-7a is related to lymph node metastasis,which would help early diagnosis and postoperative disease monitoring of laryngeal cancer,but further research is needed.
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Affiliation(s)
- E Zhou
- Department of Otorhinolaryngology Head and Neck Surgery, Hunan Provincial People's Hospital, Changsha 410005, China
| | - L Luo
- Department of Otorhinolaryngology Head and Neck Surgery, Hunan Provincial People's Hospital, Changsha 410005, China
| | - L J Ma
- Department of Otorhinolaryngology Head and Neck Surgery, Hunan Provincial People's Hospital, Changsha 410005, China
| | - J Yin
- Department of Otorhinolaryngology Head and Neck Surgery, Hunan Provincial People's Hospital, Changsha 410005, China
| | - Z Q Tan
- Department of Otorhinolaryngology Head and Neck Surgery, Hunan Provincial People's Hospital, Changsha 410005, China
| | - G Y Miao
- Department of Otorhinolaryngology Head and Neck Surgery, Hunan Provincial People's Hospital, Changsha 410005, China
| | - J Liu
- Department of Otorhinolaryngology Head and Neck Surgery, Hunan Provincial People's Hospital, Changsha 410005, China
| | - X P Xiao
- Department of Otorhinolaryngology Head and Neck Surgery, Hunan Provincial People's Hospital, Changsha 410005, China
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Ma W, Zhang CQ, Dang CX, Cai HY, Li HL, Miao GY, Wang JK, Zhang LJ. Upregulated long-non-coding RNA DLEU2 exon 9 expression was an independent indicator of unfavorable overall survival in patients with esophageal adenocarcinoma. Biomed Pharmacother 2019; 113:108655. [PMID: 30849637 DOI: 10.1016/j.biopha.2019.108655] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [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: 12/12/2018] [Revised: 01/28/2019] [Accepted: 02/01/2019] [Indexed: 01/17/2023] Open
Abstract
In this study, we aimed to explore the expression profiles of some known functional lncRNAs in esophageal adenocarcinoma (EAD) and to screening the potential prognostic makers, using data from The Cancer Genome Atlas (TCGA)-esophageal carcinoma (ESCA). Results showed that DLEU2 is a high potential OS related marker among 73 functional lncRNAs. DLEU2 and its intronic miR-15a and miR-16-1 expression were significantly upregulated in EAD compared with adjacent normal tissues. However, miR-15a and miR-16-1 expression were only weakly correlated with DLEU2 expression. Univariate and multivariate analysis confirmed that DLEU2 expression, but not miR-15a or miR-16-1 expression is an independent prognostic marker in terms of OS (HR:1.688, 95%CI: 1.085-2.627, p = 0.020) in EAD patients. The exon 9 of DLEU2 is very strongly co-expressed with DLEU2 (Pearson's r = 0.96) and showed better predictive value than total DLEU2 expression in predicting the OS of EAD patients. Multivariate analysis confirmed its independent prognostic value (HR:1.970, 95%CI: 1.266-3.067, p = 0.003), after adjustment of histologic grade, pathological stages and the presence of residual tumor. By checking the methylation status of DLEU2 gene, we excluded the possibility of the influence of two CpG sites near the DLEU2 exon 9 locus on its expression. In addition, although copy number alterations (CNAs) were observed DLEU2 gene, heterozygous loss (-1), low-level copy gain (+1) and high-level amplification (+2) had no significant association with DLEU2 transcription. Based on these findings, we infer that DLEU2 exon 9 expression might serve as a valuable biomarker of unfavorable OS in EAD patients.
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Affiliation(s)
- Wen Ma
- Department of Surgical Oncology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, 710000, China; Department of Radiotherapy, Gansu Province Hospital, Lanzhou, 730000, China
| | - Chang-Qing Zhang
- Department of Tumor Center, Gansu Province Hospital, Lanzhou, 730000, China
| | - Cheng-Xue Dang
- Department of Surgical Oncology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, 710000, China.
| | - Hong-Yi Cai
- Department of Radiotherapy, Gansu Province Hospital, Lanzhou, 730000, China
| | - Hong-Ling Li
- Department of Tumor Center, Gansu Province Hospital, Lanzhou, 730000, China
| | - Guo-Ying Miao
- Department of Radiotherapy, Gansu Province Hospital, Lanzhou, 730000, China
| | - Jian-Kai Wang
- Department of Radiotherapy, Gansu Province Hospital, Lanzhou, 730000, China
| | - Li-Juan Zhang
- Department of Radiotherapy, Gansu Province Hospital, Lanzhou, 730000, China
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Zhou Z, Miao GY, Li YQ. [Pathogenesis and research progress of the synovial sarcoma of the nasal cavity and sinus]. Lin Chung Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2018; 31:571-574. [PMID: 29871316 DOI: 10.13201/j.issn.1001-1781.2017.07.022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 12/12/2016] [Indexed: 11/12/2022]
Abstract
Synovial sarcoma of the nasal cavity and sinus are rare,comprise less than 0.1% of all soft tissue malignancies. Synovial sarcoma is a malignant mesenchymal tumor with variable epithelial differentiation, which is defined by the presence of a specific chromosomal translocation that generates SS18-SSX fusion oncogenes. The treatment include surgery,radiotherapy,chemotherapy. As the delicate anatomy of the nasal cavity and sinus limits the ability to obtain wide surgical margins. This maybe the reason why there is a higher local recurrence rate and worse disease-specific survival in head and neck sarcomas compared to other sites.
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Zhou Z, Li YQ, Li DD, Liu B, Miao GY, Xiao XP, Peng XW. [Synovial sarcoma of infratemporal fossa and pterygopalatine involving maxillary sinus 1 case and the literature review]. Lin Chung Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2018; 31:1526-1529. [PMID: 29798110 DOI: 10.13201/j.issn.1001-1781.2017.19.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 03/31/2017] [Indexed: 11/12/2022]
Abstract
We report a case which involves the maxillary sinus by original of synovial sarcoma of infratemporal fossa and pterygopalatine. A 40-years-old man presented with a history of tumor under the earlobe. It is derived from the synovial sarcoma under temporal fossa after tumor excision. The patient is limited to open his mouth and nasal obstruction. The nasal pathologic examination consider synovial sarcoma.We report the case to improve doctors' comprehension of its pathogenesis,clinical manifestations,teeatment and prognosis.
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Wang JK, Wang WJ, Cai HY, Du BB, Mai P, Zhang LJ, Ma W, Hu YG, Feng SF, Miao GY. MFAP2 promotes epithelial-mesenchymal transition in gastric cancer cells by activating TGF-β/SMAD2/3 signaling pathway. Onco Targets Ther 2018; 11:4001-4017. [PMID: 30034240 PMCID: PMC6047603 DOI: 10.2147/ott.s160831] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [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] [Indexed: 12/22/2022] Open
Abstract
Introduction Microfibril-associated protein 2 (MFAP2) is an extracellular matrix protein that interacts with fibrillin to modulate the function of microfibrils. MFAP2 has been reported to play a significant role in obesity, diabetes, and osteopenia, and has been shown to be upregulated in head and neck squamous cell carcinoma. However, the molecular function and prognostic value of MFAP2 have never been reported in gastric cancer (GC) or any other tumors. Methods The current study investigated the expression patterns, prognostic significance, functional role, and possible mechanisms of MFAP2 in GC. Results We demonstrated that MFAP2 was overexpressed in GC tissues, and its overexpression was significantly correlated with poor overall and disease-free survival in patients with GC. Moreover, we found that MFAP2 promoted the proliferation, migration, invasion, and epithelial-mesenchymal transition (EMT) phenotype in GC cells. MFAP2 might modulate EMT of GC cells by activating the TGF-β/SMAD2/3 signaling pathway. Conclusion These findings provide novel evidence that MFAP2 plays a crucial role in the progression of GC. Therefore, MFAP2 may be a promising prognostic marker and a potent anticancer agent.
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Affiliation(s)
- Jian-Kai Wang
- Department of Radiotherapy, Gansu Provincial Hospital, Lanzhou, Gansu 730000, China,
| | - Wen-Juan Wang
- Physical Examination Center, The Third People's Hospital of Gansu, Lanzhou, Gansu 730000, China
| | - Hong-Yi Cai
- Department of Radiotherapy, Gansu Provincial Hospital, Lanzhou, Gansu 730000, China,
| | - Bin-Bin Du
- Department of Anorectal Surgery, Gansu Provincial Hospital, Lanzhou, Gansu 730000, China
| | - Ping Mai
- Department of Gastroenterology, Gansu Provincial Hospital, Lanzhou, Gansu 730000, China
| | - Li-Juan Zhang
- Department of Radiotherapy, Gansu Provincial Hospital, Lanzhou, Gansu 730000, China,
| | - Wen Ma
- Department of Radiotherapy, Gansu Provincial Hospital, Lanzhou, Gansu 730000, China,
| | - Yong-Guo Hu
- Department of Radiotherapy, Gansu Provincial Hospital, Lanzhou, Gansu 730000, China,
| | - Shi-Fang Feng
- Department of Radiotherapy, Gansu Provincial Hospital, Lanzhou, Gansu 730000, China,
| | - Guo-Ying Miao
- Department of Radiotherapy, Gansu Provincial Hospital, Lanzhou, Gansu 730000, China,
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Miao GY, Zhou X, Zhang X, Xie Y, Sun C, Liu Y, Gan L, Zhang H. Telomere-Mitochondrion Links Contribute to Induction of Senescence in MCF-7 Cells after Carbon-Ion Irradiation. Asian Pac J Cancer Prev 2017; 17:1993-8. [PMID: 27221886 DOI: 10.7314/apjcp.2016.17.4.1993] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
The effects of carbon-ion irradiation on cancer cell telomere function have not been comprehensively studied. In our previous report cancer cells with telomere dysfunction were more sensitive to carbon-ion irradiation, but the underlying mechanisms remained unclear. Here we found that telomerase activity was suppressed by carbon-ion irradiation via hTERT down-regulation. Inhibition of telomere activity by MST-312 further increased cancer cell radiosensitivity to carbon-ion radiation. hTERT suppression caused by either carbon-ion irradiation or MST-312 impaired mitochondrial function, as indicated by decreased membrane potential, mtDNA copy number, mitochondrial mass, total ATP levels and elevated reactive oxygen species (ROS). PGC-1α expression was repressed after carbion-ion irradiation, and hTERT inhibition by MST-312 could further exacerbate this effect. Lowering the mitochondrial ROS level by MitoTEMPO could partially counteract the induction of cellular senescence induced by carbon-ion radiation and MST-312 incubation. Taken together, the current data suggest that telomere-mitochondrion links play a role in the induction of senescence in MCF-7 cells after carbon-ion irradiation.
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Affiliation(s)
- Guo-Ying Miao
- Department of Heavy Ion Radiation Medicine, Institute of Modern Physics, Chinese Academy of Sciences, Gansu Province, China E-mail :
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Yan CM, Chai EQ, Cai HY, Miao GY, Ma W. Oleuropein induces apoptosis via activation of caspases and suppression of phosphatidylinositol 3-kinase/protein kinase B pathway in HepG2 human hepatoma cell line. Mol Med Rep 2015; 11:4617-24. [PMID: 25634350 DOI: 10.3892/mmr.2015.3266] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2014] [Accepted: 12/12/2014] [Indexed: 12/20/2022] Open
Abstract
Oleuropein is a polyphenol, that is found in extra‑virgin olive oil. Previous studies have shown that oleuropein inhibits cell proliferation and induces apoptosis in breast cancer, colorectal cancer and thyroid cancer. The aim of the present study was to investigate the effects of oleuropein in hepatocellular carcinoma (HCC) cells. The results of Cell Counting Kit 8 and flow cytometric analysis indicated that oleuropein effectively inhibited cell viability and induced apoptosis in HepG2 human hepatoma cells in a dose‑dependent manner, through activation of the caspase pathway. Proapoptotic Bcl‑2 family members, BAX and Bcl‑2, were involved in oleuropein‑induced apoptosis. The phosphatidylinositol 3‑kinase/protein kinase B (PI3K/AKT) signaling pathway was also shown to be involved in this process. Oleuropein was demonstrated to suppress the expression of activated AKT. In addition, AKT overexpression promoted cell survival following treatment with oleuropein, while inhibition of AKT promoted cell death. Furthermore, the data demonstrated that oleuropein induces the production of reactive oxygen species (ROS) and that the function of oleuropein is, at least partially, ROS‑dependent. These results suggest that oleuropein may be a promising novel chemotherapeutic agent in hepatocellular carcinoma.
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Affiliation(s)
- Chun-Mei Yan
- Department of Radiotherapy Oncology, Gansu Provincial Hospital, Lanzhou, Gansu 730000, P.R. China
| | - Er-Qing Chai
- Cerebrovascular Diseases Center, Gansu Provincial Hospital, Lanzhou, Gansu 730000, P.R. China
| | - Hong-Yi Cai
- Department of Radiotherapy Oncology, Gansu Provincial Hospital, Lanzhou, Gansu 730000, P.R. China
| | - Guo-Ying Miao
- Department of Radiotherapy Oncology, Gansu Provincial Hospital, Lanzhou, Gansu 730000, P.R. China
| | - Wen Ma
- Department of Radiotherapy Oncology, Gansu Provincial Hospital, Lanzhou, Gansu 730000, P.R. China
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Zheng Q, Liu Y, Zhou HJ, Du YT, Zhang BP, Zhang J, Miao GY, Liu B, Zhang H. X-ray radiation promotes the metastatic potential of tongue squamous cell carcinoma cells via modulation of biomechanical and cytoskeletal properties. Hum Exp Toxicol 2015; 34:894-903. [PMID: 25586002 DOI: 10.1177/0960327114561664] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
This study investigated the metastatic potential of tongue squamous cell carcinoma (TSCC) cells after X-ray irradiation as well as radiation-induced changes in the biomechanical properties and cytoskeletal structure that are relevant to metastasis. Tca-8113 TSCC cells were X-ray-irradiated at increasing doses (0, 1, 2, or 4 Gy), and 24 h later, migration was evaluated with the wound healing and transwell migration assays, while invasion was assessed with the Matrigel invasion assay. Confocal and atomic force microscopy were used to examine changes in the structure of the actin cytoskeleton and Young's modulus (cell stiffness), respectively. X-ray radiation induced dose-dependent increases in invasive and migratory potentials of cells relative to unirradiated control cells (p < 0.05). The Young's modulus of irradiated cells was decreased by radiation exposure (p < 0.05), which was accompanied by alterations in the integrity and organization of the cytoskeletal network, as evidenced by a decrease in the signal intensity of actin fibers (p < 0.05). X-ray irradiation enhanced migration and invasiveness in Tca-8113 TSCC cells by altering their biomechanical properties and the organization of the actin cytoskeleton. A biomechanics-based analysis can provide an additional platform for assessing tumor response to radiation and optimization of cancer therapies.
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Affiliation(s)
- Q Zheng
- School of Stomatology, Lanzhou University, Lanzhou, Gansu, People's Republic of China
| | - Y Liu
- Department of Radiation Biology and Medicine, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, Gansu, People's Republic of China
| | - H J Zhou
- School of Stomatology, Northwest University for Nationalities, Lanzhou, Gansu, People's Republic of China
| | - Y T Du
- School of Stomatology, Lanzhou University, Lanzhou, Gansu, People's Republic of China
| | - B P Zhang
- School of Civil Engineering and Mechanics, Lanzhou University, Lanzhou, Gansu, People's Republic of China
| | - J Zhang
- School of Stomatology, Lanzhou University, Lanzhou, Gansu, People's Republic of China
| | - G Y Miao
- Department of Radiation Biology and Medicine, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, Gansu, People's Republic of China
| | - B Liu
- School of Stomatology, Lanzhou University, Lanzhou, Gansu, People's Republic of China Corresponding authors with equal contribution
| | - H Zhang
- Department of Radiation Biology and Medicine, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, Gansu, People's Republic of China Corresponding authors with equal contribution
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Abstract
AIM: To investigate the inhibitory effect of a specific small survivin interfering RNA (siRNA) on cell proliferation and the expression of survivin in human gastric carcinoma cell line SGC-7901.
METHODS: To knockdown survivin expression, a small interfering RNA targeting against survivin was synthesized and transfected into SGC-7901 cells with lipofectamineTM2000. The downregulation of survivin expression at both mRNA and protein levels were detected by reverse transcription-polymerase chain reaction (RT-PCR) and Western blot analysis. Cell proliferation inhibition rates were determined by methyl thiazolyl tetrazolium (MTT) assay. The effect of survivin siRNA on cell cycle distribution and cell apoptosis was determined by flow cytometry (FCM).
RESULTS: RNA interference could efficiently suppress the survivin expression in SGC-7901 cells. At 48 h after transfection, the expression inhibition rate was 44.52% at mRNA level detected by RT-PCR and 40.17% at protein level by Western blot analysis. Downregulation of survivin resulted in significant inhibition of tumor cell growth in vitro. The cell proliferation inhibition rates at 24, 48 and 72 h after survivin siRNA and non-siliencing siRNA transfection, were 34.06%, 47.61% and 40.36%, respectively. The apoptosis rate was 3.56% and the number of cells was increased in G0/G1 phase from 38.2% to 88.6%, and decreased in S and G2/M phase at 48 h after transfection.
CONCLUSION: Downregulation of survivin results in significant inhibition of tumor growth in vitro. The inhibition of survivin expression can induce apoptosis of SGC-7901 cells. The use of survivin siRNA deserves further investigation as a novel approach to cancer therapy.
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Affiliation(s)
- Guo-Ying Miao
- Department of Digestion, The People's Hospital of Gansu Province, Lanzhou 730000, Gansu Province, China.
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