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Meng F, Wang Y, Lv X, Feng F, Yang G. Electrochemiluminescent bioassay based on Ru@Zr-BTC-MOFs nanoparticles for determination of let-7a miRNA using the hybridization chain reaction. Mikrochim Acta 2023; 191:23. [PMID: 38091146 DOI: 10.1007/s00604-023-06107-0] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2023] [Accepted: 11/19/2023] [Indexed: 12/18/2023]
Abstract
Carboxyl-rich tris(4,4'-dicarboxylic acid-2,2'-bipyridyl) ruthenium(II) ([Ru(dcbpy)3]2+) and 1,3,5-phenyl tricarboxylic acid (H3BTC) were used as the organic ligand to synthesize the metal-organic frameworks by a simple one-pot hydrothermal method with ZrCl4 as metal ion source. Subsequently, the excellent electrochemiluminescence (ECL) luminophore (denoted as Ru@Zr-BTC-MOFs) was obtained. The Ru@Zr-BTC-MOFs displayed outstanding ECL properties, and a sensitive ECL bioassay based on Ru@Zr-BTC-MOFs was designed for the detection of let-7a microRNA (miRNA) using hybrid chain reaction (HCR). Under the optimal experimental conditions, the proposed bioassay exhibited a good linear relationship in the range from 50.0 fM to 5.00 × 102 pM with a detection limit of 3.71 fM. Besides, the proposed sensor exhibited satisfactory performance in real samples. The recovery was 91 ~ 108%, and the relative standard deviation was less than 5.6%. It might have potential clinical applications for detecting miRNA in biomedical research and clinical diagnosis. The schematic diagram of the preparation of Ru@Zr-BTC-MOFs (a) and ECL sensor for detecting let -7a (b).
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Affiliation(s)
- Fei Meng
- Key Laboratory of Drug Quality Control and Pharmacovigilance (China Pharmaceutical University), Ministry of Education, School of Pharmacy, China Pharmaceutical University, Nanjing, 211198, People's Republic of China
| | - Yisi Wang
- Key Laboratory of Drug Quality Control and Pharmacovigilance (China Pharmaceutical University), Ministry of Education, School of Pharmacy, China Pharmaceutical University, Nanjing, 211198, People's Republic of China
| | - Xinxin Lv
- Key Laboratory of Drug Quality Control and Pharmacovigilance (China Pharmaceutical University), Ministry of Education, School of Pharmacy, China Pharmaceutical University, Nanjing, 211198, People's Republic of China
| | - Fang Feng
- Key Laboratory of Drug Quality Control and Pharmacovigilance (China Pharmaceutical University), Ministry of Education, School of Pharmacy, China Pharmaceutical University, Nanjing, 211198, People's Republic of China.
| | - Gongjun Yang
- Key Laboratory of Drug Quality Control and Pharmacovigilance (China Pharmaceutical University), Ministry of Education, School of Pharmacy, China Pharmaceutical University, Nanjing, 211198, People's Republic of China.
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Su Y, Jiang Z, Wang Y, Zhang H. MoS 2 nanosheets supported on anodic aluminum oxide membrane: An effective interface for label-free electrochemical detection of microRNA. Anal Chim Acta 2023; 1272:341522. [PMID: 37355338 DOI: 10.1016/j.aca.2023.341522] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2023] [Revised: 05/18/2023] [Accepted: 06/09/2023] [Indexed: 06/26/2023]
Abstract
The interesting adsorption affinity of two-dimensional nanosheets to single stranded over double stranded nucleic acids have stimulated the exploration of these materials in biosensing. Herein, MoS2 nanosheets decorated anodic aluminum oxide (AAO) membrane was simply prepared by suction filtration. The MoS2/AAO hybrid membrane was initially applied to the electrochemical detection of microRNA using let-7a as the model. When let-7a was incubated with its complementary DNA, double stranded DNA-RNA formed and which displayed weak adsorption capability to the hybrid membrane. And thus the steric effect combining the electrostatic repulsion of the backbone phosphate of nucleic acids for [Fe(CN)6]3- transport across the hybrid membrane varied with the concentration of let-7a. In this way, a label-free electrochemical detection method for microRNA was established by monitoring the change of the redox current of [Fe(CN)6]3-. To further improve the detection sensitivity of the method, we proposed two separate strategies focusing on the amplification of the target-induced steric hindrance with DNA nanostructure and the magnification of the electrode sensitivity for [Fe(CN)6]3- by electrode modification. By using the two strategies, the hybrid membrane based-detection method exhibited broad linear range, low detection limit and good selectivity as well as reproducibility. Therefore, this study provided a proof-of-concept for the application of two-dimensional material to nucleic acids detection.
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Affiliation(s)
- Yuan Su
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education, College of Chemistry & Materials Science, Northwest University, Xi'an, 710127, China
| | - Zilian Jiang
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education, College of Chemistry & Materials Science, Northwest University, Xi'an, 710127, China
| | - Yahui Wang
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education, College of Chemistry & Materials Science, Northwest University, Xi'an, 710127, China
| | - Hongfang Zhang
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education, College of Chemistry & Materials Science, Northwest University, Xi'an, 710127, China.
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Selem NA, Nafae H, Manie T, Youness RA, Gad MZ. Let-7a/cMyc/CCAT1/miR-17-5p Circuit Re-sensitizes Atezolizumab Resistance in Triple Negative Breast Cancer through Modulating PD-L1. Pathol Res Pract 2023; 248:154579. [PMID: 37301086 DOI: 10.1016/j.prp.2023.154579] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/12/2023] [Revised: 05/23/2023] [Accepted: 05/27/2023] [Indexed: 06/12/2023]
Abstract
BACKGROUND Triple negative breast cancer (TNBC) is an immunogenically hot tumor. The immune checkpoint blockades (ICBs) have been recently emerged as promising therapeutic candidates for several malignancies including TNBC. Yet, the development of innate and/or adaptive resistance by TNBC patients towards ICBs such as programmed death-ligand 1 (PD-L1) inhibitors (e.g. Atezolizumab) shed the light on importance of identifying the underlying mechanisms regulating PD-L1 in TNBC. Recently, it was reported that non-coding RNAs (ncRNAs) perform a fundamental role in regulating PD-L1 expression in TNBC. Hence, this study aims to explore a novel ncRNA axis tuning PD-L1 in TNBC patients and investigate its possible involvement in fighting Atezolizumab resistance. METHODS In-silico screening was executed to identify ncRNAs that could potentially target PD-L1. Screening of PD-L1 and the nominated ncRNAs (miR-17-5p, let-7a and CCAT1 lncRNA) was performed in BC patients and cell lines. Ectopic expression and/or knockdown of respective ncRNAs were performed in MDA-MB-231. Cellular viability, migration and clonogenic capacities were evaluated using MTT, scratch assay and colony-forming assay, respectively. RESULTS PD-L1 was upregulated in BC patients, especially in TNBC patients. PD-L1 is positively associated with lymph node metastasis and high Ki-67 in recruited BC patients. Let-7a and miR-17-5p were nominated as potential regulators of PD-L1. Ectopic expression of let-7a and miR-17-5p caused a noticeable reduction in PD-L1 levels in TNBC cells. In order to investigate the whole ceRNA circuit regulating PD-L1 in TNBC, intensive bioinformatic studies were performed. The lncRNA, Colon Cancer-associated transcript 1 (CCAT1), was reported to target PD-L1 regulating miRNAs. Results showed that CCAT1 is an upregulated oncogenic lncRNA in TNBC patients and cell lines. CCAT1 siRNAs induced a noticeable reduction in PD-L1 levels and a marked increase in miR-17-5p level, building up a novel regulatory axis CCAT1/miR-17-5p/PD-L1 in TNBC cells that was tuned by the let-7a/c-Myc engine. On the functional level, co-treatment of CCAT-1 siRNAs and let-7a mimics efficiently relieved Atezolizumab resistance in MDA-MB-231 cells. CONCLUSION The present study revealed a novel PD-L1 regulatory axis via targeting let-7a/c-Myc/CCAT/miR-17-5p. Additionally, it sheds the light on the potential combinational role of CCAT-1 siRNAs and Let-7a mimics in relieving Atezolizumab resistance in TNBC patients.
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Affiliation(s)
- Noha A Selem
- Biochemistry Department, Faculty of Pharmacy and Biotechnology, German University in Cairo, Cairo, Egypt
| | - Heba Nafae
- Biochemistry Department, Faculty of Pharmacy and Biotechnology, German University in Cairo, Cairo, Egypt
| | - Tamer Manie
- Department of Breast Surgery, National Cancer Institute, Cairo University, Cairo, Egypt
| | - Rana A Youness
- Molecular Genetics Research Team (MGRT), Pharmaceutical Biology Department, Faculty of Pharmacy and Biotechnology, German University in Cairo, Cairo, Egypt; Biology and Biochemistry Department, School of Life and Medical Sciences, University of Hertfordshire Hosted by Global Academic Foundation, Cairo, Egypt.
| | - Mohamed Z Gad
- Biochemistry Department, Faculty of Pharmacy and Biotechnology, German University in Cairo, Cairo, Egypt.
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Ding X, Du Y, Sun B, Liu L, Le S, Wu C, Chen J, Chen X, Chen S, Xia J. MicroRNA let-7a mediates posttranscriptional inhibition of Nr4A1 and exacerbates cardiac allograft rejection. Cell Signal 2023:110783. [PMID: 37356602 DOI: 10.1016/j.cellsig.2023.110783] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2023] [Revised: 05/23/2023] [Accepted: 06/22/2023] [Indexed: 06/27/2023]
Abstract
BACKGROUND Acute allograft rejection remains a major obstacle after heart transplantation, and CD4+ T cells play a crucial role in allograft rejection. Upregulation of Nr4A1 could regulate CD4+ T-cell function and alleviate allograft rejection. However, the regulatory mechanism of Nr4A1 in allograft rejection remains elusive. METHODS BCLb/c mouse hearts were transplanted into WT C57BL/6 mice, and dynamic detection of the changes in Nr4A1 expression revealed that Nr4A1 was regulated posttranscriptionally after heart transplantation. Potential upstream miRNAs of Nr4A1 were screened, and the transfection of cells with these miRNA mimics/inhibitors and dual-luciferase reporter experiments were performed to clarify the regulatory mechanism of miRNAs on Nr4A1 expression. The miRNA agomiR/antagomiR was applied in vivo to validate the role of the corresponding miRNA in heart transplantation. Finally, Nr4A1 knockout mice and an adoptive T-cell cotransfer model were used to confirm the specific effects of miRNA. RESULTS The expression of Nr4A1 protein (rather than mRNA) exhibited a trend of initially increasing and then decreasing rapidly, and this phenomenon could not be reversed by lysosomal or proteasomal inhibitors. The miRNA let-7a directly binds to the Nr4A1 3'UTR and posttranscriptionally regulates Nr4A1 expression. The let-7a antagomiR prolonged allograft survival and regulated CD4+ T-cell function by upregulating Nr4A1 protein expression in CD4+ T cells. CONCLUSIONS This study confirmed that let-7a is a potential target for interfering with Nr4A1 expression in CD4+ T cells and preventing the pathological progression of cardiac allograft rejection.
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Affiliation(s)
- Xiangchao Ding
- Department of Thoracic Surgery, Renmin Hospital of Wuhan University, Wuhan, China
| | - Yifan Du
- Department of Cardiovascular Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Bing Sun
- Wuhan Third Hospital (Tongren Hospital of Wuhan University), Wuhan, China
| | - Liang Liu
- Department of Cardiovascular Surgery, Renmin Hospital of Wuhan University, Wuhan, China
| | - Sheng Le
- Department of Thoracic Surgery, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - Chuangyan Wu
- Departments of Thoracic Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Jiuling Chen
- Departments of Thoracic Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Xing Chen
- Department of Cardiovascular Surgery, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - Shanshan Chen
- Key Laboratory for Molecular Diagnosis of Hubei Province and Central Laboratory, Central Hospital of Wuhan, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.
| | - Jiahong Xia
- Department of Cardiovascular Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.
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Barone I, Gelsomino L, Accattatis FM, Giordano F, Gyorffy B, Panza S, Giuliano M, Veneziani BM, Arpino G, De Angelis C, De Placido P, Bonofiglio D, Andò S, Giordano C, Catalano S. Analysis of circulating extracellular vesicle derived microRNAs in breast cancer patients with obesity: a potential role for Let-7a. J Transl Med 2023; 21:232. [PMID: 37004031 PMCID: PMC10064709 DOI: 10.1186/s12967-023-04075-w] [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] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2023] [Accepted: 03/22/2023] [Indexed: 04/03/2023] Open
Abstract
BACKGROUND The incidence of obesity, a known risk factor for several metabolic and chronic diseases, including numerous malignancies, has risen sharply in the world. Various clinical studies demonstrate that excessive Body Mass Index (BMI) may worsen the incidence, prognosis, and mortality rates of breast cancer. Thus, understanding the link tying up obesity and breast cancer onset and progression is critically important, as it can impact patients' survival and quality of life. Recently, circulating extracellular vesicle (EV) derived miRNAs have attracted much attention for their diagnostic, prognostic and therapeutic potential in oncology research. Although the potential role of EV-derived miRNAs in the early detection of breast cancer has been repeatedly mentioned, screening of miRNAs packaged within serum EVs has not yet been reported in patients with obesity. METHODS Circulating EVs were isolated from normal weight (NW), and overweight/obese (OW/Ob) breast cancer patients and characterized by Transmission Electron Microscopy (TEM), Nanoparticle Tracking Analysis (NTA), and protein marker expression. Evaluation of EV-associated miRNAs was conducted in a screening (RNA-seq) and a validation (qRT-PCR) cohort. Bioinformatic analysis was performed to uncover significantly enriched biological processes, molecular functions and pathways. ROC and Kaplain-Meier survival analyses were used for clinical significance. RESULTS Comparison of serum EV-derived miRNAs from NW and OW/Ob patients detected seven differentially expressed miRNAs (let-7a-5p, miR-122-5p, miR-30d-5p, miR-126-3p, miR-27b-3p, miR-4772-3p, and miR-10a-5p) in the screening cohort. GO analysis revealed the enrichment of protein phosphorylation, intracellular signal transduction, signal transduction, and vesicle-mediated transport among the top biological processes. In addition, the target genes were significantly enriched in pathways related to PI3K/Akt, growth hormones, and insulin signalings, which are all involved in obesity-related diseases and/or breast cancer progression. In the validation cohort, qRT-PCR confirmed a significant down-regulation of EV-derived let-7a in the serum of OW/Ob breast cancer patients compared to NW patients. Let-7a levels also exhibited a negative correlation with BMI values. Importantly, decreased let-7a miRNA expression was associated with higher tumor grade and poor survival in patients with breast cancer. CONCLUSION These results suggest that serum-EV derived miRNAs may reflect a differential profile in relation to a patient's BMI, which, once validated in larger cohorts of patients, could provide insights into novel specific biomarkers and innovative targets to prevent the progression of obesity-mediated breast cancer.
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Affiliation(s)
- Ines Barone
- Department of Pharmacy, Health and Nutritional Sciences, University of Calabria, Via P. Bucci, Arcavacata Di Rende (CS), 87036, Rende, Cosenza, Italy.
- Centro Sanitario, University of Calabria, Via P. Bucci, Arcavacata Di Rende (CS), 87036, Rende, Cosenza, Italy.
| | - Luca Gelsomino
- Department of Pharmacy, Health and Nutritional Sciences, University of Calabria, Via P. Bucci, Arcavacata Di Rende (CS), 87036, Rende, Cosenza, Italy
- Centro Sanitario, University of Calabria, Via P. Bucci, Arcavacata Di Rende (CS), 87036, Rende, Cosenza, Italy
| | - Felice Maria Accattatis
- Department of Pharmacy, Health and Nutritional Sciences, University of Calabria, Via P. Bucci, Arcavacata Di Rende (CS), 87036, Rende, Cosenza, Italy
- Centro Sanitario, University of Calabria, Via P. Bucci, Arcavacata Di Rende (CS), 87036, Rende, Cosenza, Italy
| | - Francesca Giordano
- Department of Pharmacy, Health and Nutritional Sciences, University of Calabria, Via P. Bucci, Arcavacata Di Rende (CS), 87036, Rende, Cosenza, Italy
| | - Balazs Gyorffy
- Departments of Bioinformatics and Pediatrics, Semmelweis University, 1094, Budapest, Hungary
- TTK Cancer Biomarker Research Group, 1117, Budapest, Hungary
| | - Salvatore Panza
- Centro Sanitario, University of Calabria, Via P. Bucci, Arcavacata Di Rende (CS), 87036, Rende, Cosenza, Italy
| | - Mario Giuliano
- Department of Clinical Medicine and Surgery, University of Naples Federico II, Naples, Italy
| | - Bianca Maria Veneziani
- Department of Molecular Medicine and Medical Biotechnology, University of Naples Federico II, Naples, Italy
| | - Grazia Arpino
- Department of Clinical Medicine and Surgery, University of Naples Federico II, Naples, Italy
| | - Carmine De Angelis
- Department of Clinical Medicine and Surgery, University of Naples Federico II, Naples, Italy
| | - Pietro De Placido
- Department of Clinical Medicine and Surgery, University of Naples Federico II, Naples, Italy
| | - Daniela Bonofiglio
- Department of Pharmacy, Health and Nutritional Sciences, University of Calabria, Via P. Bucci, Arcavacata Di Rende (CS), 87036, Rende, Cosenza, Italy
- Centro Sanitario, University of Calabria, Via P. Bucci, Arcavacata Di Rende (CS), 87036, Rende, Cosenza, Italy
| | - Sebastiano Andò
- Department of Pharmacy, Health and Nutritional Sciences, University of Calabria, Via P. Bucci, Arcavacata Di Rende (CS), 87036, Rende, Cosenza, Italy
- Centro Sanitario, University of Calabria, Via P. Bucci, Arcavacata Di Rende (CS), 87036, Rende, Cosenza, Italy
| | - Cinzia Giordano
- Department of Pharmacy, Health and Nutritional Sciences, University of Calabria, Via P. Bucci, Arcavacata Di Rende (CS), 87036, Rende, Cosenza, Italy
- Centro Sanitario, University of Calabria, Via P. Bucci, Arcavacata Di Rende (CS), 87036, Rende, Cosenza, Italy
| | - Stefania Catalano
- Department of Pharmacy, Health and Nutritional Sciences, University of Calabria, Via P. Bucci, Arcavacata Di Rende (CS), 87036, Rende, Cosenza, Italy.
- Centro Sanitario, University of Calabria, Via P. Bucci, Arcavacata Di Rende (CS), 87036, Rende, Cosenza, Italy.
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Xue W, Jiang Z, Wang Y, Zhang H. Combining bioinspired nanochannels with ferrocene doped MoS 2 nanoplates: Application to ratiometric electrochemical detection of let-7a. Anal Chim Acta 2023; 1239:340690. [PMID: 36628709 DOI: 10.1016/j.aca.2022.340690] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2022] [Revised: 11/10/2022] [Accepted: 11/28/2022] [Indexed: 12/03/2022]
Abstract
Sensitive and accurate detection of tumor suppressor genes is vastly important to the related therapeutic research. Herein, a ratiometric electrochemical method for let-7a detection was established by integrating a ferrocene (Fc) doped MoS2 nanoplates modified electrode into the nanochannels-based biosensing platform. The ratiometric signal was developed by the redox current of methylene blue (MB) which reflects the target recognition occurred into the nanochannels and the redox current of Fc which corrects the slight signal deviation caused by some analyte-independent factors. And thus, the ratio of peak current of MB and Fc (IMB/IFc) measured at differential pulse voltammogram varied precisely with the increment of the concentration of let-7a incubated in the bioinspired nanochannels. The strategy of spherical DNAzyme induced deposition in nanochannels was utilized to further amplify the signal. Under optimal conditions, a wide linear dynamic range of 50 aM to 10 pM spanning five orders of magnitude was obtained. The developed electrochemical method, with attomole level of detection limit, was successfully applied to the determination of let-7a in human serum and tumor cells. The study not only offers a new route for reliable nucleic acid detection, but also provides an excellent opportunity to extend the application of the two-dimensional transition-metal dichalcogenides.
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Affiliation(s)
- Wenwen Xue
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education, College of Chemistry & Materials Science, Northwest University, Xi'an, 710127, China
| | - Zilian Jiang
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education, College of Chemistry & Materials Science, Northwest University, Xi'an, 710127, China
| | - Yahui Wang
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education, College of Chemistry & Materials Science, Northwest University, Xi'an, 710127, China
| | - Hongfang Zhang
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education, College of Chemistry & Materials Science, Northwest University, Xi'an, 710127, China.
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Zhang L, Zhang Z, Xie J, Zhao Y, Tian G, Jiang H, Tao H, Liu J. Target invasion-triggered signal amplification based on duplex-specific nuclease for selective and sensitive detection of miRNAs. Anal Chim Acta 2022; 1189:339182. [PMID: 34815041 DOI: 10.1016/j.aca.2021.339182] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [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: 07/18/2021] [Revised: 10/06/2021] [Accepted: 10/15/2021] [Indexed: 01/10/2023]
Abstract
Dysregulation of MicroRNAs (miRNAs) cause various diseases in humans, and developing reliable methods to detect miRNAs is critical for molecular diagnostics and personalized medicine. This study developed a toehold-mediated target invasion combined with duplex-specificity nuclease (DSN)-assisted cyclic signal amplification fluorescent sensor. Herein, we take advantage of toehold-mediated target invasion process to ensure the high selectivity of miRNA determination, coupled with the unique cleavage properties of DSN to improve the sensitivity of the strategy significantly. Throughout the assay, the whole procedure of detection the target let-7a has a limit of detection (LOD) as low as 9.00 fM and an excellent linear range from 1 pM to 100 nM for no more than 60 min. The assay shows reasonable specificity in detecting mismatched miRNAs and can realize single-base discrimination in the let-7 families. Finally, the developed method was applied to detect the miRNAs extracted from human serum. The results were consistent with those based on the quantitative reverse transcription-polymerase chain reaction(qRT-PCR) method, which shows great potential application value in clinical molecular diagnostics and biological research.
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Affiliation(s)
- Limei Zhang
- Department of Laboratory Medicine, The Affiliated Hospital of Southwest Medical, University, Luzhou, 646000, PR China
| | - Zhang Zhang
- Department of Laboratory Medicine, The Affiliated Hospital of Southwest Medical, University, Luzhou, 646000, PR China
| | - Jingling Xie
- Department of Laboratory Medicine, The Affiliated Hospital of Southwest Medical, University, Luzhou, 646000, PR China
| | - Yuanqing Zhao
- Department of Laboratory Medicine, The Affiliated Hospital of Southwest Medical, University, Luzhou, 646000, PR China
| | - Gang Tian
- Department of Laboratory Medicine, The Affiliated Hospital of Southwest Medical, University, Luzhou, 646000, PR China
| | - Hui Jiang
- Department of Laboratory Medicine, The Affiliated Hospital of Southwest Medical, University, Luzhou, 646000, PR China
| | - Hualin Tao
- Department of Laboratory Medicine, The Affiliated Hospital of Southwest Medical, University, Luzhou, 646000, PR China.
| | - Jinbo Liu
- Department of Laboratory Medicine, The Affiliated Hospital of Southwest Medical, University, Luzhou, 646000, PR China.
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Kokolo M, Bach-Elias M. P68 RNA Helicase (DDX5) Required for the Formation of Various Specific and Mature miRNA Active RISC Complexes. Microrna 2022; 11:36-44. [PMID: 35184719 PMCID: PMC10556402 DOI: 10.2174/2211536611666220218121640] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [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: 06/23/2021] [Revised: 11/17/2021] [Accepted: 12/28/2021] [Indexed: 11/22/2022]
Abstract
INTRODUCTION DEAD-box RNA helicases catalyze the ATP-dependent unwinding of doublestranded RNA. In addition, they are required for protein displacement and remodelling of RNA or RNA/protein complexes. P68 RNA helicase regulates the alternative splicing of the important protooncogene H-Ras, and numerous studies have shown that p68 RNA helicase is probably involved in miRNA biogenesis, mainly through Drosha and RISC/DICER complexes. OBJECTIVE This study aimed to determine how p68 RNA helicase affects the activity of selected mature miRNAs, including miR-342, miR-330, miR-138 and miR-206, miR-126, and miR-335, and let-7a, which are known to be related to cancer processes. METHODS The miRNA levels were analyzed in stable HeLa cells containing p68 RNA helicase RNAi induced by doxycycline (DOX). Relevant results were repeated using transient transfection with pSuper/ pSuper-p68 RNA helicase RNAi to avoid DOX interference. RESULTS Herein, we reported that p68 RNA helicase downregulation increases the accumulation of the mature miRNAs, such as miR-126, let-7a, miR-206, and miR-138. Interestingly, the accumulation of these mature miRNAs does not downregulate their known protein targets, thus suggesting that p68 RNA helicase is required for mature miRNA-active RISC complex activity. CONCLUSION Furthermore, we demonstrated that this requirement is conserved, as drosophila p68 RNA helicase can complete the p68 RNA helicase depleted activity in human cells. Dicer and Drosha proteins are not affected by the downregulation of p68 RNA helicase despite the fact that Dicer is also localized in the nucleus when p68 RNA helicase activity is reduced.
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Affiliation(s)
- Mariette Kokolo
- Instituto de Investigaciones Biomédicas de Barcelona-Consejo Superior de Investigaciones Científicas, Barcelona, Spain
| | - Montse Bach-Elias
- Instituto de Investigaciones Biomédicas de Barcelona-Consejo Superior de Investigaciones Científicas, Barcelona, Spain
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Xu J, Zhang Z, Huang L, Xiong J, Zhou Z, Yu H, Wu L, Liu Z, Cao K. Let-7a suppresses Ewing sarcoma CSCs' malignant phenotype via forming a positive feedback circuit with STAT3 and lin28. J Bone Oncol 2021; 31:100406. [PMID: 34917467 PMCID: PMC8645918 DOI: 10.1016/j.jbo.2021.100406] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2021] [Revised: 10/27/2021] [Accepted: 11/29/2021] [Indexed: 11/17/2022] Open
Abstract
Let-7a was repressed in the cancer stem cells of Ewing sarcoma(ES-CSCs). Increase the expression of let-7a suppress the ability of colony formation and invasion of ES-CSCs. Let-7a, STAT3 and lin28 form a positive feedback circuit in ES-CSCs. Increase the expression of let-7a suppress xenograft tumor growth of ES-CSCs.
Cancer stem cells (CSCs) have been documented to be closely related with tumor metastasis and recurrence, and the same important role were identified in Ewing Sarcoma (ES). In our previous study, we found that let-7a expression was repressed in ES. Herein, we further identified its putative effects in the CSCs of ES (ES-CSCs). The expression of let-7a was consistently suppressed in the separated side population (SP) cells, which were identified to contain the characteristics of the stem cells. Then, we increased the expression of let-7a in ES-CSCs, and found that the ability of colony formation and invasion of ES-CSCs were suppressed in vitro. The same results were found in the tumor growth of ES-CSCs’ xenograft mice in vivo. To further explore the putative mechanism involved, we also explored whether signal transducer and activator of transcription 3 (STAT3) was involved in the suppressive effects. As expected, excessive expression of let-7a could suppress the expression STAT3 in the ES-CSCs, and repressed the expression of STAT3 imitated the suppressive effects of let-7a on ES-CSCs, suppressing the ability of colony formation and invasion of ES-CSCs. Furthermore, we found lin28 was involved in the relative impacts of let-7a, as well as STAT3. Let-7a, STAT3 and lin28 might form a positive feedback circuit, which serve a pivotal role in the carcinogensis of ES-CSCs. These findings maybe provide assistance for patients with ES in the future, especially those with metastasis and recurrence, and new directions for their treatment.
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Key Words
- ABCG2, ATP-binding cassette transporter G 2
- ATCC, American Type Culture Collection
- CSCs, Cancer stem cells
- Cancer stem cells
- ES, Ewing Sarcoma
- ES-CSCs, CSCs of ES
- Ewing sarcoma
- FBS, fatal bovine serum
- Let-7a
- Lin28
- MMP2, Matrix Metallopeptidase 2
- MSCs, mesenchymal stem cells
- ORF, open reading frame
- PBS, phosphate buffer saline
- PI, propidium iodide
- SP, side populationl
- STAT3
- STAT3, signal transducer and activator of transcription 3
- iPSCs, human induced pluripotent stem cells
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Affiliation(s)
- Jiang Xu
- Department of Orthopedics, The First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi 330006, PR China
| | - Zhongzu Zhang
- Department of Orthopedics, The Yongchuan Hospital of Chongqing Medical University, Chongqing 402160, PR China
| | - Lu Huang
- Department of Children Health and Care, Jiangxi Maternal and Child Health Hospital, Nanchang, Jiangxi 330006, PR China
| | - Jiachao Xiong
- Department of Orthopedics, The First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi 330006, PR China
| | - Zhenhai Zhou
- Department of Orthopedics, The First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi 330006, PR China
| | - Honggui Yu
- Department of Orthopedics, The First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi 330006, PR China
| | - Liang Wu
- Department of Orthopedics, The First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi 330006, PR China
| | - Zhimin Liu
- Department of Orthopedics, The First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi 330006, PR China
| | - Kai Cao
- Department of Orthopedics, The First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi 330006, PR China
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10
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Zare A, Fardid R, Tamadon GH, Mosleh-Shirazi MA. miR-155, miR-21, and let-7a Expressions in MCF-10A and MCF-7 Cell Lines after Low to High Dose Irradiation. Cell J 2021; 23:532-537. [PMID: 34837680 PMCID: PMC8588820 DOI: 10.22074/cellj.2021.7411] [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] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Accepted: 06/08/2021] [Indexed: 11/04/2022]
Abstract
OBJECTIVE Ionizing radiation is a tremendous risk factor for cancer development. MicroRNAs (miRNAs) are regulators that utilize cell pathways, which are implicated in human cancer prognosis. In addition, miRNAs respond to anti-cancer therapy and proliferation after irradiation. However, the changes in miRNA expression profiles in response to irradiation have not been comprehensively analysed. The present study was designed to assess potential changes that occur in miRNA expression following irradiation. MATERIALS AND METHODS In this experimental study, we used quantitative real-time polymerase chain reaction (qRTPCR) to measure the expressions of miR-155, miR-21, and let-7a in MCF-10A (normal breast cells) and MCF-7 (breast cancer cells) six hours after the cells were exposed to five different irradiation doses (50, 100, 400, 2000, and 4000 mGY). RESULTS After irradiation from the low to high doses, we observed an upsurge in miR-155 (more than 100%) expression and reduction in let-7a (more than 87%) expression. However, there was an increase and a reduction in miR-21 expression (more than 100%). CONCLUSION Irradiation can play an important role in cancer development in normal breast cells (MCF-10A) at low dose irradiation. However, the results showed little difference at high doses of radiation.
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Affiliation(s)
- Afsaneh Zare
- Department of Radiology, School of Paramedical Sciences, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Reza Fardid
- Department of Radiology, School of Paramedical Sciences, Shiraz University of Medical Sciences, Shiraz, Iran,Ionizing and Non-Ionizing Radiation Protection Research Centre, School of Paramedical Sciences, Shiraz University of Medical
Sciences, Shiraz, Iran,P.O.Box: 71348-14336Department of RadiologySchool of Paramedical SciencesShiraz University of
Medical SciencesShirazIran
| | - Gholam Hossein Tamadon
- Department of Laboratory Sciences, School of Paramedical Sciences, Shiraz University of Medical Sciences, Shiraz, Iran,Diagnostic Laboratory Sciences and Technology Research Centre, School of Paramedical Sciences, Shiraz University of Medical
Sciences, Shiraz, Iran
| | - Mohammad Amin Mosleh-Shirazi
- Ionizing and Non-Ionizing Radiation Protection Research Centre, School of Paramedical Sciences, Shiraz University of Medical
Sciences, Shiraz, Iran,Physics Unit, Department of Radio-Oncology, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
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11
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Deshmukh SK, Srivastava SK, Zubair H, Khan MA, Singh AP, Singh S. Resistin Induces LIN28A-Mediated Let-7a Repression in Breast Cancer Cells Leading to IL-6 and STAT3 Upregulation. Cancers (Basel) 2021; 13:4498. [PMID: 34572725 DOI: 10.3390/cancers13184498] [Citation(s) in RCA: 3] [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: 07/30/2021] [Revised: 08/31/2021] [Accepted: 09/03/2021] [Indexed: 01/20/2023] Open
Abstract
Simple Summary Breast cancer is the second leading cause of cancer-related death in women in the United States and exhibits significant racial disparities in clinical outcomes. Earlier, we reported that the levels of resistin and IL-6 were significantly more elevated in the serum of African American women with breast cancer than in their Caucasian American counterparts. Here, we uncover its mechanistic significance by characterizing a novel resistin/LIN28A/Let-7a/IL-6/STAT3 signaling axis supporting the growth and stemness of breast cancer cells. Abstract Downregulation of the Let-7 family of microRNAs (miRNAs) has been reported in several cancers, including breast malignancy; however, underlying mechanisms are not completely understood. Resistin is an important component of the tumor microenvironment, having a functional impact on the tumor cell phenotypes. Here, we examined the role of resistin in the regulation of Let-7 miRNAs and studied its downstream consequences. We found that resistin treatment led to the reduced expression of Let-7 family miRNAs in breast cancer (BC) cells, with the highest downregulation reported for Let-7a. Furthermore, resistin induced the expression of LIN28A, and its silencing abrogated resistin-mediated Let-7a suppression. Let-7a restoration or LIN28A silencing abolished the resistin-induced growth, clonogenicity, and sphere-forming ability of BC cells. Restoration of Let-7a also suppressed the resistin-induced expression of genes associated with growth, survival, and stemness. Pathway analysis suggested STAT3 as a putative central node associated with Let-7a-mediated gene regulation. In silico analysis identified STAT3 and its upstream modifier, IL-6, as putative Let-7a gene targets, which were later confirmed by 3′UTR-reporter assays. Together, our findings demonstrate a novel resistin/LIN28A/Let-7a/IL-6/STAT3 signaling axis supporting the growth and stemness of BC cells.
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Cao W, Wang Q, Huang C. Let-7a Inhibits Tumor Metastasis by Regulating TGF-β/Smad Signaling in the Colorectal Adenocarcinoma Cell Line LS-174T. Anticancer Res 2021; 41:3801-3808. [PMID: 34281839 DOI: 10.21873/anticanres.15172] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2021] [Revised: 06/21/2021] [Accepted: 07/05/2021] [Indexed: 11/10/2022]
Abstract
BACKGROUND/AIM Colorectal adenocarcinoma has a poor prognosis due to its propensity for metastasis. It has been experimentally demonstrated that the microRNA (miRNA) let-7a can effectively inhibit tumor proliferation and metastasis by regulating the transforming growth factor (TGF)-β signaling pathway; however, limited research has been conducted in the area of on colorectal cancer. Herein, we aimed to clarify the role and regulation of let-7a in a colorectal adenocarcinoma cell line (LS-174T). MATERIALS AND METHODS LS-174T cells were transfected to express let-7a. Let-7a miRNA expression was detected by quantitative real-time polymerase chain reaction (RT-qPCR). Cell growth was assessed by methyl thiazolyl tetrazolium (MTT) assay; invasion and migration were examined by Matrigel invasion and wound healing assays. The expression levels of matrix metalloproteinase (MMP)-2, phosphorylated Drosophila mothers against decapentaplegic 2 (p-SMAD2), and TGF-β1 were analyzed by western blotting. The mRNA expression levels of TGFB1 were also analyzed by RT-qPCR. RESULTS Overexpression of let-7a resulted in significant inhibition of LS-174T cell proliferation in vitro. The invasion and migration abilities of the cells overexpressing let-7a were decreased, compared to the control group and miR-negative control group. Transfection of LS-174T cells with let-7a resulted in down-regulation of MMP-2, as well as of TGF-β1 and p-SMAD2 protein expression. Moreover, TGF-β1 mRNA levels were reduced following let-7a overexpression. CONCLUSION Let-7a inhibited the growth and metastasis of colonic mucinous adenocarcinoma cells, at least partially, by regulating the TGF-β/Smad signaling pathway.
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Affiliation(s)
- Weilan Cao
- Department of Anorectal Surgery, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, P.R. China
| | - Quanpeng Wang
- The Second School of Medicine, Wenzhou Medical University, Wenzhou, P.R. China
| | - Chongjie Huang
- Department of Anorectal Surgery, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, P.R. China
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Anzalone G, Moscato M, Montalbano AM, Albano GD, Gagliardo R, Marchese R, Fucarino A, Nigro CL, Drago G, Profita M. PBDEs affect inflammatory and oncosuppressive mechanisms via the EZH2 methyltransferase in airway epithelial cells. Life Sci 2021; 282:119827. [PMID: 34273373 DOI: 10.1016/j.lfs.2021.119827] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [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: 03/25/2021] [Revised: 06/30/2021] [Accepted: 07/08/2021] [Indexed: 12/21/2022]
Abstract
AIMS We aimed to investigate the effect of PBDEs (47, 99, 209) on cellular events involved in epigenetic modification, inflammation, and epithelial mesenchymal transition (EMT). MATERIALS AND METHODS We studied: 1) ERK1/2 phosphorylation; 2) Enhancer of Zester Homolog 2 (EZH2); 3) Histone H3 tri-methylated in lysine 27 (H3K27me3); 4) K-RAS; 5) silencing disabled homolog 2-interacting protein gene (DAB2IP), 6) let-7a; 7) Muc5AC/Muc5B, and 8) IL-8 in a 3D in vitro model of epithelium obtained with primary Normal Human Bronchial Epithelial cells (pNHBEs) or A549 cell line, chronically exposed to PBDEs (47, 99, 209). KEY FINDINGS PBDEs (10 nM, 100 nM and 1 μM) increased ERK1/2 phosphorylation, and EZH2, H3K27me3, and K-RAS protein expression, while decreased DAB2IP and Let-7a transcripts in pNHBEs ALI culture. Furthermore PBDEs (47, 99) (100 nM) increased Muc5AC and Muc5B mRNA, and PBDE 47 (100 nM) IL-8 mRNA via EZH2 in pNHBEs. Finally, PBDEs (100 nM) affected EZH2, H3K27me3, K-RAS protein expression, and DAB2IP, Let-7a transcripts and cell invasion in A549 cells. Gsk343 (methyltransferase EZH2 inhibitor) (1 mM) and U0126 (inhibitor of MEK1/2) (10 μM) were used to show the specific effect of PBDEs. SIGNIFICANCE PBDE inhalation might promote inflammation/cancer via EZH2 methyltransferase activity and H3K27me3, k-RAS and ERk1/2 involvement, generating adverse health outcomes of the human lung.
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Affiliation(s)
- Giulia Anzalone
- Institute for Biomedical Research and Innovation (IRIB), National Research Council of Italy (CNR), Palermo, Italy
| | - Monica Moscato
- Institute for Biomedical Research and Innovation (IRIB), National Research Council of Italy (CNR), Palermo, Italy
| | - Angela Marina Montalbano
- Institute for Biomedical Research and Innovation (IRIB), National Research Council of Italy (CNR), Palermo, Italy
| | - Giusy Daniela Albano
- Institute for Biomedical Research and Innovation (IRIB), National Research Council of Italy (CNR), Palermo, Italy
| | - Rosalia Gagliardo
- Institute for Biomedical Research and Innovation (IRIB), National Research Council of Italy (CNR), Palermo, Italy
| | - Roberto Marchese
- Interventional Pulmonology Unit, La Maddalena Cancer Center, Palermo, Italy
| | - Alberto Fucarino
- Department of Experimental Biomedicine and Clinical Neuroscience (BioNec), University of Palermo, Palermo, Italy
| | - Chiara Lo Nigro
- Interventional Pulmonology Unit, La Maddalena Cancer Center, Palermo, Italy
| | - Gaspare Drago
- Institute for Biomedical Research and Innovation (IRIB), National Research Council of Italy (CNR), Palermo, Italy
| | - Mirella Profita
- Institute for Biomedical Research and Innovation (IRIB), National Research Council of Italy (CNR), Palermo, Italy.
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Marinović S, Škrtić A, Catela Ivković T, Poljak M, Kapitanović S. Regulation of KRAS protein expression by miR-544a and KRAS-LCS6 polymorphism in wild-type KRAS sporadic colon adenocarcinoma. Hum Cell 2021; 34:1455-1465. [PMID: 34235620 DOI: 10.1007/s13577-021-00576-2] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2021] [Accepted: 06/29/2021] [Indexed: 12/24/2022]
Abstract
Colorectal carcinoma (CRC) results from the accumulation of genetic mutations and alterations in signaling pathways. KRAS is mutated in 40% of CRC cases and is involved in increased tumor cells proliferation and survival. Although KRAS mutations are a dominant event in CRC tumorigenesis, increased wild-type KRAS expression has a similar effect on accelerated tumor growth. In this study, we investigated the KRAS status in correlation with clinicopathological features in sporadic CRC and more importantly the role of let-7a-5p and miR-544a-3p in the regulation of wild-type KRAS protein expression in the tumor center (T1) and invasive tumor front (T2). Analysis showed that 39.1% of tumor samples had KRAS mutations. In wild-type KRAS tumors, 62.0% were positive for KRAS protein expression and there was a higher percentage of KRAS-positive tumor cells and a higher intensity of immunohistochemical reaction in T2 than in T1 samples. This could not be attributed to differences in KRAS mRNA levels, suggesting regulation via miR-544a-3p expression which was significantly decreased in T2 samples. Furthermore, we demonstrated that tumor samples carrying the KRAS-LCS6 variant allele had significantly higher protein expression of the wild-type KRAS. Our results suggest the role of the KRAS-LCS6 polymorphism and miR-544a-3p expression in the regulation of wild-type KRAS protein expression in sporadic CRC.
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Affiliation(s)
- Sonja Marinović
- Division of Molecular Medicine, Laboratory for Personalized Medicine, Ruđer Bošković Institute, Zagreb, Croatia
| | - Anita Škrtić
- Department of Pathology, Clinical Hospital Merkur, Zagreb, Croatia
| | - Tina Catela Ivković
- Division of Molecular Medicine, Laboratory for Personalized Medicine, Ruđer Bošković Institute, Zagreb, Croatia.,Central European Institute of Technology, Masaryk University, Brno, Czech Republic
| | - Mirko Poljak
- Department of Surgery, Clinical Hospital Merkur, Zagreb, Croatia
| | - Sanja Kapitanović
- Division of Molecular Medicine, Laboratory for Personalized Medicine, Ruđer Bošković Institute, Zagreb, Croatia.
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15
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Huang JH, Duan H, Wang S, Wang YY, Lv CX. Upregulated microRNA let-7a accelerates apoptosis and inhibits proliferation in uterine junctional zone smooth muscle cells in adenomyosis under conditions of a normal activated hippo-YAP1 axis. Reprod Biol Endocrinol 2021; 19:81. [PMID: 34082774 PMCID: PMC8173847 DOI: 10.1186/s12958-021-00753-w] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/25/2021] [Accepted: 04/27/2021] [Indexed: 12/28/2022] Open
Abstract
BACKGROUND Let-7a is a small non-coding RNA that has been found to take part in cell proliferation and apoptosis. The hippo-YAP1 axis, known as a tumour suppressor pathway, also plays an important role in cell proliferation and apoptosis. YAP1, TAZ, and phospho-YAP1 play key roles in actions of the hippo-YAP1 axis. Adenomyosis (ADS) is a proliferative disease leading to a large uterus in patients with prolonged illness. Abnormal proliferation of smooth muscle cells (SMCs) in the uterine endometrial-myometrial junctional zone (JZ) is an important reason for developing ADS. This study aimed to explore the expression levels of let-7a and components of the hippo-YAP1 axis in SMCs in the uterine endometrial-myometrial JZ in ADS and to explore the roles of let-7a and the hippo-YAP1 axis of JZ SMC proliferation and apoptosis in ADS. METHODS We collected JZ tissues for the primary culture of SMCs from 25 women diagnosed with ADS and 27 women without ADS. We used quantitative real-time polymerase chain reaction and western blotting to measure the mRNA and protein expression levels of let-7a, YAP1, TAZ, and phospho-YAP1 in ADS JZ SMCs. A CCK-8 assay and flow cytometry analysis of apoptosis were utilized to test the proliferation and apoptosis of JZ SMCs. The let-7a overexpression lentiviral vector GV280 was used to increase the expression level of let-7a. We added verteporfin to block the phosphorylation of components of the hippo-YAP1 axis. RESULTS We found that the let-7a level was decreased, while the YAP1 and TAZ levels were increased in ADS JZ SMCs. Upregulated let-7a affected the expression levels of components of the hippo-YAP1 axis, accelerated apoptosis, and inhibited proliferation in JZ SMCs. Furthermore, accumulated YAP1 led to increasing proliferation of JZ SMCs after verteporfin treatment to block the phosphorylation of components of the hippo-YAP1 axis. If components of the hippo-YAP1 axis were unphosphorylated, upregulated let-7a could not inhibit the proliferation of ADS JZ SMCs. Upregulated let-7a could not activate the hippo-YAP1 axis in verteporfin treatment. CONCLUSIONS Our findings suggest that the let-7a and hippo-YAP1 axis may act as important regulators of JZ SMCs proliferation, and upregulated let-7a may be an effective method to treat ADS.
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Affiliation(s)
- Jun-Hua Huang
- Department of Minimally Invasive Gynecologic Center, Beijing Obstetrics and Gynecology Hospital, Capital Medical University, 17 Qi Helou Road, Dong Cheng, Beijing, 100006, P.R. China
| | - Hua Duan
- Department of Minimally Invasive Gynecologic Center, Beijing Obstetrics and Gynecology Hospital, Capital Medical University, 17 Qi Helou Road, Dong Cheng, Beijing, 100006, P.R. China.
| | - Sha Wang
- Department of Minimally Invasive Gynecologic Center, Beijing Obstetrics and Gynecology Hospital, Capital Medical University, 17 Qi Helou Road, Dong Cheng, Beijing, 100006, P.R. China
| | - Yi-Yi Wang
- Department of Minimally Invasive Gynecologic Center, Beijing Obstetrics and Gynecology Hospital, Capital Medical University, 17 Qi Helou Road, Dong Cheng, Beijing, 100006, P.R. China
| | - Cheng-Xiao Lv
- Department of Minimally Invasive Gynecologic Center, Beijing Obstetrics and Gynecology Hospital, Capital Medical University, 17 Qi Helou Road, Dong Cheng, Beijing, 100006, P.R. China
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Pan X, Wang G, Wang B. MicroRNA-1182 and let-7a exert synergistic inhibition on invasion, migration and autophagy of cholangiocarcinoma cells through down-regulation of NUAK1. Cancer Cell Int 2021; 21:161. [PMID: 33750398 PMCID: PMC7942015 DOI: 10.1186/s12935-021-01797-z] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [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: 01/04/2020] [Accepted: 01/27/2021] [Indexed: 12/17/2022] Open
Abstract
Background Cholangiocarcinoma (CCA) is the second most common primary liver malignancy worldwide. Several microRNAs (miRNAs) have been implicated as potential tumor suppressors in CCA. This study aims to explore the potential effects of miR-1182 and let-7a on CCA development. Methods Bioinformatics analysis was conducted to screen differentially expressed genes in CCA, Western blot analysis detected NUAK1 protein expression and RT-qPCR detected miR-1182, let-7a and NUAK1 expression in CCA tissues and cell lines. Dual luciferase reporter gene assay and RIP were applied to validate the relationship between miR-1182 and NUAK1 as well as between let-7a and NUAK1. Functional experiment was conducted to investigate the role of miR-1182, let-7a and NUAK1 in cell migration, proliferation and autophagy. Then, the CCA cells that received various treatments were implanted to mice to establish animal model, followed by tumor observation and HE staining to evaluate lung metastasis. Results CCA tissues and cells were observed to have a high expression of NUAK1 and poor expression of miR-1182 and let-7a. NUAK1 was indicated as a target gene of miR-1182 and let-7a. Importantly, upregulation of either miR-1182 or let-7a induced autophagy, and inhibited cell progression and in vivo tumor growth and lung metastasis; moreover, combined treatment of miR-1182 and let-7a overexpression presented with enhanced inhibitory effect on NUAK1 expression and CCA progression, but such synergistic effect could be reversed by overexpression of NUAK1. Conclusion Taken together, the findings suggest the presence of a synergistic antitumor effect of miR-1182 and let-7a on the development of CCA via the down-regulation of NUAK1, providing novel insight into the targeted therapy against CCA.
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Affiliation(s)
- Xin Pan
- Interventional Department, The Fourth Affiliated Hospital of China Medical University, No. 4, Chongshan East Road, Huanggu District, Shenyang, 110032, Liaoning, People's Republic of China.
| | - Gang Wang
- Interventional Department, The Fourth Affiliated Hospital of China Medical University, No. 4, Chongshan East Road, Huanggu District, Shenyang, 110032, Liaoning, People's Republic of China
| | - Baoming Wang
- Interventional Department, The Fourth Affiliated Hospital of China Medical University, No. 4, Chongshan East Road, Huanggu District, Shenyang, 110032, Liaoning, People's Republic of China
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17
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Liu YD, Zhuang XP, Cai DL, Cao C, Gu QS, Liu XN, Zheng BB, Guan BJ, Yu L, Li JK, Ding HB, Yan DW. Let-7a regulates EV secretion and mitochondrial oxidative phosphorylation by targeting SNAP23 in colorectal cancer. J Exp Clin Cancer Res 2021; 40:31. [PMID: 33446221 PMCID: PMC7807815 DOI: 10.1186/s13046-020-01813-6] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/27/2020] [Accepted: 12/11/2020] [Indexed: 12/24/2022]
Abstract
Background MicroRNAs (miRNAs) are abundant in tumor-derived extracellular vesicles (EVs) and the functions of extracellular miRNA to recipient cells have been extensively studied with tumorigenesis. However, the role of miRNA in EV secretion from cancer cells remains unknown. Methods qPCR and bioinformatics analysis were applied for determining extracellular let-7a expression from CRC patient serum and cells. Nanosight particle tracking analysis was performed for investigating the effect of let-7a on EV secretion. Luciferase reporter assays was used for identifying targeted genes synaptosome-associated protein 23 (SNAP23). In vitro and in vivo assays were used for exploring the function of let-7a/SNAP23 axis in CRC progression. Bioenergetic assays were performed for investigating the role of let-7a/SNAP23 in cellular metabolic reprogramming. Results let-7a miRNA was elevated in serum EVs from CRC patients and was enriched in CRC cell-derived EVs. We determined that let-7a could suppress EV secretion directly targeting SNAP23. In turn, SNAP23 promotes EV secretion of let-7a to downregulate the intracellular let-7a expression. In addition, we found a novel mechanism of let-7a/SNAP23 axis by regulating mitochondrial oxidative phosphorylation (OXPHOS) through Lin28a/SDHA signaling pathway. Conclusions Let-7a plays an essential role in not only inhibiting EV secretion, but also suppressing OXPHOS through SNAP23, resulting in the suppression of CRC progression, suggesting that let-7a/SNAP23 axis could provide not only effective tumor biomarkers but also novel targets for tumor therapeutic strategies. Supplementary Information The online version contains supplementary material available at 10.1186/s13046-020-01813-6.
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Affiliation(s)
- You Dong Liu
- Department of General Surgery, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200080, China
| | - Xiao Peng Zhuang
- Department of General Surgery, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200080, China
| | - Dong Lan Cai
- Department of Ophthalmology, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200080, China
| | - Can Cao
- Department of General Surgery, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200080, China
| | - Qi Sheng Gu
- Department of General Surgery, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200080, China
| | - Xue Ni Liu
- Department of General Surgery, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200080, China
| | - Bin Bin Zheng
- Department of General Surgery, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200080, China
| | - Bing Jie Guan
- Department of General Surgery, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200080, China
| | - Liang Yu
- Department of General Surgery, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200080, China
| | - Ji Kun Li
- Department of General Surgery, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200080, China
| | - Hui Bin Ding
- Department of General Surgery, The People's Hospital of Rugao, Rugao, Jiangsu, 226500, China.
| | - Dong Wang Yan
- Department of General Surgery, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200080, China.
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Tilley AMC, Howard CM, Sridharan S, Subramaniyan B, Bearss NR, Alkhalili S, Raman D. The CXCR4-Dependent LASP1-Ago2 Interaction in Triple-Negative Breast Cancer. Cancers (Basel) 2020; 12:E2455. [PMID: 32872485 DOI: 10.3390/cancers12092455] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [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: 07/11/2020] [Revised: 08/20/2020] [Accepted: 08/26/2020] [Indexed: 12/28/2022] Open
Abstract
The CXCR4-LASP1 axis is an emerging target in the field of breast cancer metastasis. C-X-C chemokine receptor type 4 (CXCR4) mediates directed cell migration when activated by its cognate ligand CXCL12. LIM and SH3 Protein 1 (LASP1) is a critical node in the CXCR4 signaling pathway, as its deficiency blocks CXCR4-dependent Matrigel invasion. The mechanism by which LASP1 facilitates this invasive ability of tumor cells when CXCR4 is activated is unknown. Our previous proteomics work had revealed several components of the RNA interference (RNAi) machinery as being potential LASP1 interacting proteins. Here we report that argonaute 2 (Ago2), a protein with central involvement in RNAi, associates with LASP1 in triple-negative breast cancer (TNBC) cells. We demonstrate that LASP1 co-immunoprecipitates with Ago2 endogenously in a CXCL12-dependent manner, with further confirmation of this interaction by proximity ligation assay. Furthermore, this association is specific to CXCR4 as it can be abrogated by the CXCR4 antagonist, AMD3465. By GST-pulldown approach, we identify that LASP1 directly binds to Ago2 through its LIM and SH3 domains, and that this binding is dictated by the S146 and Y171 phosphorylation sites of LASP1. Additionally, the phosphorylation status of LASP1 affected tumor suppressor microRNA (miRNA) Let-7a-guided Ago2 activity. Levels of several endogenous targets of Let-7a were found to be altered including C-C chemokine receptor type 7 (CCR7), which is another critical chemokine receptor involved in metastasis to lymph nodes. Our results suggest a novel role for the LASP1-Ago2 module in shaping the RNAi landscape, functionally impacting the invasive ability of cancer cells.
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Cheng G, He L, Zhang Y. LincRNA-Cox2 promotes pulmonary arterial hypertension by regulating the let-7a-mediated STAT3 signaling pathway. Mol Cell Biochem 2020; 475:239-47. [PMID: 32803651 DOI: 10.1007/s11010-020-03877-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2020] [Accepted: 08/07/2020] [Indexed: 12/18/2022]
Abstract
It is well supported by the literature that the proliferation and migration of pulmonary arterial smooth muscle cells (PASMCs) are critical for the development of pulmonary arterial hypertension (PAH). Long intergenic noncoding RNA COX2 (lincRNA-COX2) is a regulator of inflammation and might be conducive to the progression of atherosclerosis, while its role in PAH is still unclear. This study was performed to explore the role and mechanism of lincRNA-COX2 in PASMCs proliferation and migration in an anaerobic environment. PASMCs were treated by hypoxia to construct PAH cell models. RT-PCR and western blot were recruited to evaluate the expression levels of lincRNA-COX2, miR-let-7a and STAT3. Their roles in proliferation and cell and migration of PASMCs were determined by the CCK-8 assay, wound-healing assay, and flow cytometry. In peripheral blood samples from PAH patients and hypoxic PASMCs, lincRNA-COX2 expression was enhanced. Silencing lincRNA-COX2 inhibited hypoxia-induced PASMCs proliferation by influencing the G2/M phase of the cell cycle. Meanwhile, lincRNA-COX2 regulated STAT3 through miR-let-7a and its effects on hypoxic PASMCs worked through miR-let-7a/STAT3 axis. To conclude, silencing lincRNA-COX2 attenuated the development of hypoxic PASMCs. LincRNA-COX2/miR-let-7a/STAT3 axis might be considered as a novel target to treat PAH.
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20
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Yang G, Wang T, Qu X, Chen S, Han Z, Chen S, Chen M, Lin J, Yu S, Gao L, Peng K, Kang M. Exosomal miR-21/ Let-7a ratio distinguishes non-small cell lung cancer from benign pulmonary diseases. Asia Pac J Clin Oncol 2020; 16:280-286. [PMID: 32525285 PMCID: PMC7496917 DOI: 10.1111/ajco.13343] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [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: 01/12/2020] [Accepted: 03/19/2020] [Indexed: 12/21/2022]
Abstract
Aim To assess the exosomal miR‐21/Let‐7a ratio, a noninvasive method, in distinguishing non‐small cell lung cancer (NSCLC) from benign pulmonary diseases. Methods The exosomes were extracted from the peripheral blood serum using serum exosomal extraction kit. miR‐21 and Let‐7a levels were evaluated by quantitative reverse transcription polymerase chain reaction. Results We found that miR‐21/Let‐7a ratio of NSCLC patients was significantly higher than that of healthy people, patients with pulmonary inflammation diseases, and benign pulmonary nodules, respectively. Receiver‐operating characteristic analysis revealed that as compared with healthy controls, miR‐21/Let‐7a produced the area under the curve (AUC) at 0.8029 in patients with NSCLC, which helped to distinguish NSCLC from healthy controls with 81.33% sensitivity and 69.57% specificity. In addition, the AUC of miR‐21/Let‐7a in NSCLC patients was 0.8196 in comparison to patients with pulmonary inflammation diseases. Meanwhile, the sensitivity and specificity were 56.00% and 100%, respectively. Furthermore, compared with patients with benign pulmonary nodules, the AUC of miR‐21/Let‐7a in NSCLC patients was 0.7539. The sensitivity and specificity were 56.00% and 82.61%, respectively. Conclusion In the present study, our findings revealed that exosomal miR‐21/Let‐7a ratio holds considerable promise as a noninvasive biomarker for the diagnosis of NSCLC from benign pulmonary diseases.
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Affiliation(s)
- Guofeng Yang
- Department of Thoracic Surgery, Fujian Medical University Union Hospital, Fuzhou, China
| | - Tao Wang
- Jiangsu Engineering Research Center for Tumor Molecular Diagnosis, Suzhou, China
| | - Xiangyun Qu
- Jiangsu Engineering Research Center for Tumor Molecular Diagnosis, Suzhou, China
| | - Shuchen Chen
- Department of Thoracic Surgery, Fujian Medical University Union Hospital, Fuzhou, China
| | - Ziyang Han
- Department of Thoracic Surgery, Fujian Medical University Union Hospital, Fuzhou, China
| | - Sui Chen
- Department of Thoracic Surgery, Fujian Medical University Union Hospital, Fuzhou, China
| | - Mingduan Chen
- Department of Thoracic Surgery, Fujian Medical University Union Hospital, Fuzhou, China
| | - Jihong Lin
- Department of Thoracic Surgery, Fujian Medical University Union Hospital, Fuzhou, China
| | - Shaobin Yu
- Department of Thoracic Surgery, Fujian Medical University Union Hospital, Fuzhou, China
| | - Lei Gao
- Department of Thoracic Surgery, Fujian Medical University Union Hospital, Fuzhou, China
| | - Kaiming Peng
- Department of Thoracic Surgery, Fujian Medical University Union Hospital, Fuzhou, China
| | - Mingqiang Kang
- Department of Thoracic Surgery, Fujian Medical University Union Hospital, Fuzhou, China.,Key Laboratory of Gastrointestinal Cancer, Fujian Medical University, Ministry of Education, Fuzhou, China.,Fujian Key Laboratory of Tumor Microbiology, Fujian Medical University, Fuzhou, China
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21
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Zhang J, Quan LN, Meng Q, Wang HY, Wang J, Yu P, Fu JT, Li YJ, Chen J, Cheng H, Wu QP, Yu XR, Yun HY, Huang SG. miR-548e Sponged by ZFAS1 Regulates Metastasis and Cisplatin Resistance of OC by Targeting CXCR4 and let-7a/BCL-XL/S Signaling Axis. Mol Ther Nucleic Acids 2020; 20:621-638. [PMID: 32353736 PMCID: PMC7191130 DOI: 10.1016/j.omtn.2020.03.013] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/24/2020] [Revised: 03/17/2020] [Accepted: 03/27/2020] [Indexed: 12/23/2022]
Abstract
Ovarian cancer (OC) is a severe malignancy featuring a poor prognosis due to rapid metastasis and chemotherapy resistance. In this study, we extensively investigated the upstream and downstream mechanisms of miR-548e in regulating OC progression and cisplatin resistance. Our results indicated that ZFAS1 was highly expressed and promoted OC cell proliferation, migration, invasion, and cisplatin resistance by directly suppressing miR-548e expression. ZFAS1 co-localized with miR-548e in the cytosols of OC cells. miR-548e repressed CXCR4 expression, and elevated CXCR4 expression promoted OC cell proliferation, migration, invasion, and cisplatin resistance. Cisplatin resistance induced by ZFAS1 and CXCR4 overexpression in OC cells was mediated by their suppression on let-7a and elevation of BCL-XL/S expression. ZFAS1 knockdown and miR-548e and let-7a overexpression impaired cisplatin resistance and suppressed lung metastatic nodule formation in nude mice. In conclusion, ZFAS1 binds with miR-548e to enhance CXCR4 expression to promote OC cell proliferation and metastasis, which also enhances cisplatin resistance by suppressing let-7a and elevating BCL-XL/S protein expression.
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Affiliation(s)
- Jing Zhang
- Department of Obstetrics and Gynecology, Affiliated Haikou Hospital of Xiangya Medical College, Central South University, No. 43 Renmin Road, Haidian Island, Haikou 570208, Hainan Province, P.R. China
| | - Li-Ni Quan
- Department of Obstetrics and Gynecology, Affiliated Haikou Hospital of Xiangya Medical College, Central South University, No. 43 Renmin Road, Haidian Island, Haikou 570208, Hainan Province, P.R. China
| | - Qiu Meng
- Department of Obstetrics and Gynecology, Affiliated Haikou Hospital of Xiangya Medical College, Central South University, No. 43 Renmin Road, Haidian Island, Haikou 570208, Hainan Province, P.R. China
| | - Hai-Yan Wang
- Department of Obstetrics and Gynecology, Affiliated Haikou Hospital of Xiangya Medical College, Central South University, No. 43 Renmin Road, Haidian Island, Haikou 570208, Hainan Province, P.R. China
| | - Jie Wang
- Department of Obstetrics and Gynecology, Affiliated Haikou Hospital of Xiangya Medical College, Central South University, No. 43 Renmin Road, Haidian Island, Haikou 570208, Hainan Province, P.R. China
| | - Pin Yu
- Department of Obstetrics and Gynecology, Affiliated Haikou Hospital of Xiangya Medical College, Central South University, No. 43 Renmin Road, Haidian Island, Haikou 570208, Hainan Province, P.R. China
| | - Jian-Tao Fu
- Department of Obstetrics and Gynecology, Affiliated Haikou Hospital of Xiangya Medical College, Central South University, No. 43 Renmin Road, Haidian Island, Haikou 570208, Hainan Province, P.R. China
| | - Ying-Jia Li
- Clinical Laboratory, Third Xiangya Hospital of Central South University, No. 138 Tong Zipo Road, Changsha 410013, Hunan Province, P.R. China
| | - Jin Chen
- Department of Obstetrics and Gynecology, Affiliated Haikou Hospital of Xiangya Medical College, Central South University, No. 43 Renmin Road, Haidian Island, Haikou 570208, Hainan Province, P.R. China
| | - Hong Cheng
- Department of Obstetrics and Gynecology, Affiliated Haikou Hospital of Xiangya Medical College, Central South University, No. 43 Renmin Road, Haidian Island, Haikou 570208, Hainan Province, P.R. China
| | - Qing-Ping Wu
- Department of Obstetrics and Gynecology, Affiliated Haikou Hospital of Xiangya Medical College, Central South University, No. 43 Renmin Road, Haidian Island, Haikou 570208, Hainan Province, P.R. China
| | - Xin-Rong Yu
- Department of Obstetrics and Gynecology, Affiliated Haikou Hospital of Xiangya Medical College, Central South University, No. 43 Renmin Road, Haidian Island, Haikou 570208, Hainan Province, P.R. China
| | - Hong-Ye Yun
- Department of Obstetrics and Gynecology, Affiliated Haikou Hospital of Xiangya Medical College, Central South University, No. 43 Renmin Road, Haidian Island, Haikou 570208, Hainan Province, P.R. China
| | - Shou-Guo Huang
- Department of Obstetrics and Gynecology, Affiliated Haikou Hospital of Xiangya Medical College, Central South University, No. 43 Renmin Road, Haidian Island, Haikou 570208, Hainan Province, P.R. China.
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22
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Lin SL, Duan H, Wang S, Li JJ. Overexpression of Lin28B Promoted the Proliferation of Adenomyotic Smooth Muscle Cells of the Junctional Zone via Regulating Let-7a. Reprod Sci 2020; 27:1156-1163. [PMID: 32046465 DOI: 10.1007/s43032-019-00107-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [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: 06/12/2019] [Accepted: 09/27/2019] [Indexed: 12/13/2022]
Abstract
The inner myometrium, also called the junctional zone (JZ), is believed to play a major role in the development of adenomyosis. Recently, we found that the lethal-7a (Let-7a) microRNA (miRNA) was clearly downregulated in the miRNA expression profiles of JZ smooth muscle cells (JZSMCs) of patients with adenomyosis. Lin28, including Lin28A and Lin28B, is responsible for the post-transcriptional downregulation of the Let-7 miRNA family. However, the expression pattern of Lin28 and the function of the Lin28/Let-7 axis in adenomyosis have not yet been identified. In this study, we aim to explore the potential roles of the Lin28/Let-7 axis in the development of adenomyosis. Immunohistochemistry, western blot, and reverse transcription polymerase chain reaction (RT-qPCR) were used to evaluate the Lin28 expression, respectively. The correlation between Let-7a, Lin28A, and Lin28B expression was further examined using Pearson's correlation analysis. RNA interference was used to inhibit Lin28B gene, and then Cell Counting Kit (CCK-8) assay was performed to detect the cell proliferation capacity. The results revealed that the expression levels of Lin28B were upregulated in the JZ of adenomyosis whatever about proteins or mRNA (P < 0.0001); furthermore, its mRNA expression level was negatively correlated with Let-7a (r = - 0.749, P < 0.0001). After inhibiting Lin28B gene, the proliferation capacity of JZSMCs in adenomyosis group decreased after 48 h (P < 0.05). These results indicated that Lin28B may be involved in the pathogenesis of adenomyosis by promoting the proliferation capacity of JZSMCs via regulating Let-7a.
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Affiliation(s)
- Si-Li Lin
- Department of Minimally Invasive Gynecologic Center, Beijing Obstetrics and Gynecology Hospital, Capital Medical University, No. 17 Qi Helou Street, Dong Cheng District, Beijing, 100006, China
| | - Hua Duan
- Department of Minimally Invasive Gynecologic Center, Beijing Obstetrics and Gynecology Hospital, Capital Medical University, No. 17 Qi Helou Street, Dong Cheng District, Beijing, 100006, China.
| | - Sha Wang
- Department of Minimally Invasive Gynecologic Center, Beijing Obstetrics and Gynecology Hospital, Capital Medical University, No. 17 Qi Helou Street, Dong Cheng District, Beijing, 100006, China
| | - Jin-Jiao Li
- Department of Minimally Invasive Gynecologic Center, Beijing Obstetrics and Gynecology Hospital, Capital Medical University, No. 17 Qi Helou Street, Dong Cheng District, Beijing, 100006, China
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23
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Shekari N, Asghari F, Haghnavaz N, Shanehbandi D, Khaze V, Baradaran B, Kazemi T. Let-7a Could Serve as A Biomarker for Chemo-Responsiveness to Docetaxel in Gastric Cancer. Anticancer Agents Med Chem 2019; 19:304-309. [PMID: 30543177 DOI: 10.2174/1871520619666181213110258] [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: 11/27/2017] [Revised: 01/14/2018] [Accepted: 11/29/2018] [Indexed: 02/08/2023]
Abstract
BACKGROUND MicroRNAs are noncoding RNAs which play critical roles in response to anti-cancer agents. Let-7a and miR-21 are well-known tumor-suppressor and oncomiR miRNAs, respectively. They are involved in tumorigenesis of gastric cancer and have potential to be used as markers in response to the therapy. OBJECTIVE We aimed to study alterations in the expression of Let-7a and miR-21, and their targets in gastric cancer cell lines after treatment with docetaxel. METHODS In order to determine the IC50 of docetaxel, MTT assay was performed in AGS, MKN45 and KATO III gastric cancer cell lines. The expression levels of Let-7a and miR-21 and their target genes, HMGA2 and PDCD4, were determined by reverse-transcription quantitative real-time PCR for both treated and untreated cell lines. RESULTS MTT assay showed higher IC50 concentration of docetaxel in KATO III in comparison with AGS and MKN45, indicating KATO III`s higher resistance to docetaxel. Following the treatment, the expression level of Let-7a was significantly increased in AGS and MKN45, while decreased in KATO III. Expression level of miR- 21 in the three treated cell lines was increased significantly. Not only Let-7a, but also expression level of HMGA2 and PDCD4 genes showed different patterns in KATO III in comparison with AGS and MKN45. CONCLUSION Down-regulation and up-regulation of Let-7a in docetaxel-resistant and sensitive cell lines, respectively indicates its potential usefulness as biomarker for responsiveness of gastric cancer to the therapy with docetaxel and also for predicting patient`s outcome.
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Affiliation(s)
- Najibeh Shekari
- Immunology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran.,Department of Immunology, Faculty of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran.,Student Research Committee, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Faezeh Asghari
- Immunology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran.,Department of Immunology, Faculty of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Navideh Haghnavaz
- Immunology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran.,Department of Immunology, Faculty of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Dariush Shanehbandi
- Immunology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran.,Department of Immunology, Faculty of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Vahid Khaze
- Immunology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Behzad Baradaran
- Immunology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran.,Department of Immunology, Faculty of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Tohid Kazemi
- Immunology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran.,Department of Immunology, Faculty of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran
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24
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Wu J, Feng X, Du Y, Luan B, Yu H, Yu Y, Wu L, Zhao H. β-catenin/LIN28B promotes the proliferation of human choriocarcinoma cells via Let-7a repression. Acta Biochim Biophys Sin (Shanghai) 2019; 51:455-462. [PMID: 30958882 DOI: 10.1093/abbs/gmz027] [Citation(s) in RCA: 5] [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: 10/31/2018] [Revised: 02/27/2019] [Accepted: 03/02/2019] [Indexed: 01/03/2023] Open
Abstract
Choriocarcinoma is a rare and malignant trophoblastic tumor. However, the molecular mechanisms by which choriocarcinoma is regulated remain unknown. In the present study, we first elucidated that LIN28B was highly expressed in human choriocarcinoma tissues and choriocarcinoma cell lines. Our data further demonstrated that knockdown of LIN28B by small interfering RNA caused an increase in Let-7a expression in JAR cells. In addition, silencing of LIN28B inhibited IGF2BP1 expression and suppressed cell proliferation capacity, both of which can be markedly restored by Let-7a inhibitor. In contrast, LIN28B over-expression-improved cell proliferation was inhibited by Let-7a mimic. Knockdown of β-catenin resulted in reduced expression of LIN28B and increased expression of Let-7a. Knockdown of β-catenin also caused a decrease in cell proliferation, which can be recovered by re-expression of LIN28B or by Let-7a inhibitor. Collectively, our data indicate that β-catenin/LIN28B/Let-7a pathway may be crucial for the regulation of cell proliferation in human choriocarcinoma cells.
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Affiliation(s)
- Jing Wu
- Obstetrics and Gynecology Hospital, Fudan University, Shanghai, China
- Department of Obstetrics and Gynecology of Shanghai Medical School, Fudan University, Shanghai, China
- Shanghai Key Laboratory of Female Reproductive Endocrine Related Diseases, Shanghai, China
| | - Xuan Feng
- Obstetrics and Gynecology Hospital, Fudan University, Shanghai, China
- Department of Obstetrics and Gynecology of Shanghai Medical School, Fudan University, Shanghai, China
- Shanghai Key Laboratory of Female Reproductive Endocrine Related Diseases, Shanghai, China
| | - Yan Du
- Obstetrics and Gynecology Hospital, Fudan University, Shanghai, China
- Department of Obstetrics and Gynecology of Shanghai Medical School, Fudan University, Shanghai, China
| | - Baoxin Luan
- Obstetrics and Gynecology Hospital, Fudan University, Shanghai, China
- Department of Obstetrics and Gynecology of Shanghai Medical School, Fudan University, Shanghai, China
- Shanghai Key Laboratory of Female Reproductive Endocrine Related Diseases, Shanghai, China
| | - Huandi Yu
- Obstetrics and Gynecology Hospital, Fudan University, Shanghai, China
- Department of Obstetrics and Gynecology of Shanghai Medical School, Fudan University, Shanghai, China
- Shanghai Key Laboratory of Female Reproductive Endocrine Related Diseases, Shanghai, China
| | - Yinhua Yu
- Obstetrics and Gynecology Hospital, Fudan University, Shanghai, China
- Department of Obstetrics and Gynecology of Shanghai Medical School, Fudan University, Shanghai, China
- Shanghai Key Laboratory of Female Reproductive Endocrine Related Diseases, Shanghai, China
| | - Lanxiang Wu
- Institute of Life Sciences, Chongqing Medical University, Chongqing, China
| | - Hongbo Zhao
- Obstetrics and Gynecology Hospital, Fudan University, Shanghai, China
- Department of Obstetrics and Gynecology of Shanghai Medical School, Fudan University, Shanghai, China
- Shanghai Key Laboratory of Female Reproductive Endocrine Related Diseases, Shanghai, China
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25
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Qi Y, Zheng G, Di C, Zhang J, Wang X, Hong Y, Song Y, Chen R, Yang Y, Yan Y, Xu L, Tan X, Yang L. Latency-associated nuclear antigen inhibits lytic replication of Kaposi's sarcoma-associated herpesvirus by regulating let-7a/RBPJ signaling. Virology 2019; 531:69-78. [PMID: 30856484 DOI: 10.1016/j.virol.2019.02.019] [Citation(s) in RCA: 7] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2018] [Revised: 02/27/2019] [Accepted: 02/27/2019] [Indexed: 10/27/2022]
Abstract
Latency-associated nuclear antigen (LANA) is the key factor in the establishment and maintenance of latency of Kaposi's sarcoma-associated herpesvirus (KSHV). A cellular protein, recombination signal binding protein for immunoglobulin kappa J region (RBPJ), is essential for the lytic reactivation of KSHV. However, whether RBPJ expression is regulated by KSHV is not clear. Here, we show that LANA upregulates let-7a and its primary transcripts in parallel with its reduction of RBPJ expression. An increase in notch intracellular domain (NICD) and the downregulation of NF-κB and LIN28B contribute to the upregulation of let-7a by LANA. Let-7a represses RBPJ expression by directly binding the 3' untranslated region of RBPJ. Let-7a overexpression or RBPJ knockdown led to a dose- and time-dependent inhibition of lytic reactivation of KSHV. Collectively, these findings support a model wherein LANA inhibits the lytic replication of KSHV by regulating let-7a/RBPJ signaling.
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Affiliation(s)
- Yan Qi
- School of Medicine, Hangzhou Normal University, Hangzhou, Zhejiang, People's Republic of China
| | - Guoxia Zheng
- School of Medicine, Hangzhou Normal University, Hangzhou, Zhejiang, People's Republic of China
| | - Chunhong Di
- Affiliated Hospital, Hangzhou Normal University, Hangzhou, Zhejiang, People's Republic of China
| | - Jinxia Zhang
- School of Medicine, Hangzhou Normal University, Hangzhou, Zhejiang, People's Republic of China
| | - Xiaobo Wang
- Affiliated Hospital, Hangzhou Normal University, Hangzhou, Zhejiang, People's Republic of China
| | - Yu Hong
- School of Medicine, Hangzhou Normal University, Hangzhou, Zhejiang, People's Republic of China
| | - Yang Song
- School of Medicine, Hangzhou Normal University, Hangzhou, Zhejiang, People's Republic of China
| | - Rong Chen
- School of Medicine, Hangzhou Normal University, Hangzhou, Zhejiang, People's Republic of China
| | - Yi Yang
- School of Medicine, Hangzhou Normal University, Hangzhou, Zhejiang, People's Republic of China
| | - Yutao Yan
- School of Medicine, Hangzhou Normal University, Hangzhou, Zhejiang, People's Republic of China
| | - Liangwen Xu
- School of Medicine, Hangzhou Normal University, Hangzhou, Zhejiang, People's Republic of China
| | - Xiaohua Tan
- School of Medicine, Hangzhou Normal University, Hangzhou, Zhejiang, People's Republic of China.
| | - Lei Yang
- School of Medicine, Hangzhou Normal University, Hangzhou, Zhejiang, People's Republic of China.
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26
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Sun W, Lv J, Duan L, Lin R, Li Y, Li S, Fu C, Zhao L, Xin S. Long noncoding RNA H19 promotes vascular remodeling by sponging let-7a to upregulate the expression of cyclin D1. Biochem Biophys Res Commun 2018; 508:1038-1042. [PMID: 30551879 DOI: 10.1016/j.bbrc.2018.11.185] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [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: 11/13/2018] [Accepted: 11/28/2018] [Indexed: 12/12/2022]
Abstract
Vascular remodeling is mainly caused by excessive proliferation of vascular smooth muscle cells (VSMCs). Noncoding RNAs (ncRNAs) have emerged as important regulators in diverse pathological processes. Previous work has shown the functions and mechanisms of long noncoding RNA H19 (LncRNA H19) on VSMCs. As long noncoding RNAs (lncRNAs) are complex in their mechanisms of action, the aim of the study is to identify if there are any other molecular mechanisms of LncRNA H19 on VSMCs. In vivo studies demonstrated that cyclin D1 was overexpressed in neointima of balloon-injured artery. In vitro studies identified that the overexpression of LncRNA H19 promoted VSMCs proliferation and cyclin D1 upregulation. On the contrary, cellular proliferation and expression of cyclin D1 were inhibited in VSMCs after infection with let-7a. Furthermore, luciferase reporter assays and RNA pull-down assays were used to explore the regulatory mechanism, we found that LncRNA H19 functioned as a competing endogenous RNA (ceRNA) by sponging let-7a to promote the expression of the target gene cyclin D1. In conclusion, LncRNA H19 positively regulated cyclin D1 expression through directly binding to let-7a in VSMCs. Our findings provide new insight into the mechanism of LncRNA H19 in VSMCs proliferation and vascular remodeling, and further indicate the implications of LncRNA H19 in the diagnosis and treatment of vascular proliferative diseases.
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Affiliation(s)
- Weifeng Sun
- Department of Vascular Surgery, The First Hospital of China Medical University, Shenyang, 110001, China
| | - Junyuan Lv
- Department of Breast and Thyroid Surgery, The Affiliated Hospital of Zunyi Medical College, Zunyi, 563000, China
| | - Liren Duan
- Department of Vascular Surgery, The First Hospital of China Medical University, Shenyang, 110001, China
| | - Ruoran Lin
- Department of Vascular Surgery, The First Hospital of China Medical University, Shenyang, 110001, China
| | - Yugang Li
- Department of Vascular Surgery, The First Hospital of China Medical University, Shenyang, 110001, China
| | - Shanqiong Li
- Department of Pharmacology, School of Pharmacy, Liaoning Key Laboratory of Molecular Targeted Anti-Tumor Drug Development and Evaluation, China Medical University, Shenyang, 110122, China
| | - Chen Fu
- Department of Pharmacology, School of Pharmacy, Liaoning Key Laboratory of Molecular Targeted Anti-Tumor Drug Development and Evaluation, China Medical University, Shenyang, 110122, China
| | - Lin Zhao
- Department of Pharmacology, School of Pharmacy, Liaoning Key Laboratory of Molecular Targeted Anti-Tumor Drug Development and Evaluation, China Medical University, Shenyang, 110122, China
| | - Shijie Xin
- Department of Vascular Surgery, The First Hospital of China Medical University, Shenyang, 110001, China.
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Wang S, Zhou H, Wu D, Ni H, Chen Z, Chen C, Xiang Y, Dai K, Chen X, Li X. MicroRNA let-7a regulates angiogenesis by targeting TGFBR3 mRNA. J Cell Mol Med 2018; 23:556-567. [PMID: 30467960 PMCID: PMC6307798 DOI: 10.1111/jcmm.13960] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [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: 07/18/2018] [Revised: 09/16/2018] [Accepted: 09/21/2018] [Indexed: 12/15/2022] Open
Abstract
Angiogenesis has a great impact on human health, owing to its participation in development, wound healing and the pathogenesis of several diseases. It has been reported that let-7a is a tumour suppressor, but whether it plays a role in angiogenesis is unclear. Here we showed that let-7a, a microRNA conserved in vertebrates, regulated angiogenesis by concomitantly down-regulating TGFBR3. Overexpression of let-7a or knockdown of TGFBR3 in cell culture inhibited the tube formation and reduced migration rate. Moreover, xenograft experiments showed that overexpression of let-7a or knockdown of TGFBR3 had smaller tumour size. Downstream genes, such as VEGFC and MMP9, were also down-regulated in let-7a overexpression or TGFBR3 knockdown groups. Therefore, our results revealed a novel mechanism that let-7a regulate angiogenesis through post-transcriptional regulation of TGFBR3.
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Affiliation(s)
- Shao Wang
- School of Mental Health, Wenzhou Medical University, Wenzhou, China.,The Affiliated Kangning Hospital of Wenzhou Medical University, Wenzhou, China
| | - Huandong Zhou
- The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
| | - Dazhou Wu
- The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
| | - Huajing Ni
- The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
| | - Zhongliang Chen
- The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
| | - Chengshui Chen
- The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
| | - Youqun Xiang
- The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
| | - Kezhi Dai
- School of Mental Health, Wenzhou Medical University, Wenzhou, China.,The Affiliated Kangning Hospital of Wenzhou Medical University, Wenzhou, China.,The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
| | - Xiaoming Chen
- The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
| | - Xi Li
- School of Mental Health, Wenzhou Medical University, Wenzhou, China.,The Affiliated Kangning Hospital of Wenzhou Medical University, Wenzhou, China.,The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
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Yang Z, Jiang X, Zhang J, Huang X, Zhang X, Wang J, Shi H, Yu A. Let-7a promotes microglia M2 polarization by targeting CKIP-1 following ICH. Immunol Lett 2018; 202:1-7. [PMID: 30053453 DOI: 10.1016/j.imlet.2018.07.007] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2018] [Revised: 07/23/2018] [Accepted: 07/23/2018] [Indexed: 12/14/2022]
Abstract
Microglia polarization plays a crucial role in initiating brain inflammatory injury after intracerebral hemorrhage (ICH). Casein Kinase 2 Interacting Protein 1(CKIP-1) has been identified as a transcriptional molecular to manipulate microglia polarization. MiRNAs regulate gene expression and microglia polarization. In the experiment, CKIP-1 has been predicted as a target gene of let-7a. Let-7a, CKIP-1 and downstream proinflammatory mediator production of ICH mice were analyzed. In addition, inflammation, brain edema, and neurological functions in ICH mice were also assessed. Furthermore, let-7a mimic or inhibitors was administrated to study the potential role to manipulate microglia polarization after ICH. We reported that let-7a levels decreased but CKIP-1 levels increased after ICH. Using a dual-luciferase reporter assay, it was demonstrated that CKIP-1 was the target gene of let-7a. Let-7a overexpression decreased the protein levels of CKIP-1 and inhibition of let-7a increased the protein levels of CKIP-1. In addition, our results indicate that let-7a could inhibit expression of proinflammatory cytokines, reduce brain edema, and improve neurological functions in ICH mice. The study indicated that CKIP-1 was a target gene of let-7a and that let-7a regulated microglia M2 polarization by targeting CKIP-1 following ICH.
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Anene C, Graham AM, Boyne J, Roberts W. Platelet microparticle delivered microRNA- Let-7a promotes the angiogenic switch. Biochim Biophys Acta Mol Basis Dis 2018; 1864:2633-43. [PMID: 29684582 DOI: 10.1016/j.bbadis.2018.04.013] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2017] [Revised: 04/16/2018] [Accepted: 04/17/2018] [Indexed: 01/14/2023]
Abstract
Platelet microparticle (PMP)-induced angiogenesis plays a key role in tumour metastasis and has been proposed to contribute towards cardiovascular disease by enhancing atherosclerotic plaque vulnerability. However, the mechanisms underlying PMP induced angiogenesis are ill defined. Recent reports demonstrate that PMPs deliver micro-RNAs (miRNAs) to recipient cells, controlling gene expression. We therefore evaluated whether miRNA transfer was a key regulator of PMP-induced angiogenesis. Co-culturing PMPs with human umbilical vein endothelial cells (HUVEC) on extracellular matrix gel induced robust capillary like structure formation. PMP treatment altered the release of angiogenesis modulators from HUVEC, including significantly reducing production of anti-angiogenic thrombospondin-1 (THBS-1). Both functional responses were abrogated by treating PMPs with RNase, suggesting the transfer of PMP-derived RNA was a critical event. PMPs were an abundant source of miRNA Let-7a, which was transferred to HUVEC following co-incubation. Using luciferase reporter assays we have shown that Let-7a directly targets the 3'UTR of the THBS-1 mRNA. HUVEC transfection with a Let-7a anti-sense oligonucleotide reduced the ability of PMPs to inhibit THBS-1 release, and significantly decreased PMP induced in vitro angiogenesis. Antibody neutralisation of THBS-1 reversed the anti-angiogenic effect of let-7a inhibition in PMP treated HUVEC, highlighting Let-7a dependent translational repression of THBS-1 drives angiogenesis. Importantly, plasmid overexpression of Let-7a in HUVEC alone induced robust tubule formation on extracellular matrix gel. These data reveal a new role for Let-7a in promoting angiogenesis and show for the first time PMPs induced angiogenic responses occur through miRNA regulation of HUVEC.
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Shi Y, Cao T, Huang H, Lian C, Yang Y, Wang Z, Ma J, Xia J. Arsenic trioxide inhibits cell growth and motility via up-regulation of let-7a in breast cancer cells. Cell Cycle 2017; 16:2396-2403. [PMID: 28980872 DOI: 10.1080/15384101.2017.1387699] [Citation(s) in RCA: 27] [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] [Indexed: 12/14/2022] Open
Abstract
Arsenic trioxide (ATO) has been reported to exert its anti-cancer activities in human cancers. However, the molecular mechanism of ATO-triggered anti-tumor activity has not been fully elucidated. Recently, multiple studies demonstrated that ATO could regulate miRNAs in human cancers. Therefore, in this study, we investigated whether ATO regulated let-7a in breast cancer cells. We found that ATO upregulated let-7a level in breast cancer cells. We also found that up-regulation of let-7a inhibited cell growth and induced apoptosis and retarded cell migration and invasion. We also observed that up-regulation of let-7a enhanced cell growth inhibition and invasion suppression induced by ATO treatment. Our findings suggest that ATO suppressed cell growth, stimulated apoptosis, and retarded cell invasion partly via upregulation of let-7a in breast cancer cells. Our study provides a new anti-tumor mechanism of ATO treatment in breast cancer.
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Affiliation(s)
- Ying Shi
- a Department of Biochemistry and Molecular Biology , Bengbu Medical College, Bengbu , Anhui , China
| | - Tong Cao
- b Research Center of Clinical Laboratory Science , Bengbu Medical College , Bengbu , Anhui , China
| | - Hua Huang
- a Department of Biochemistry and Molecular Biology , Bengbu Medical College, Bengbu , Anhui , China
| | - Chaoqun Lian
- a Department of Biochemistry and Molecular Biology , Bengbu Medical College, Bengbu , Anhui , China
| | - Ying Yang
- a Department of Biochemistry and Molecular Biology , Bengbu Medical College, Bengbu , Anhui , China
| | - Zhiwei Wang
- a Department of Biochemistry and Molecular Biology , Bengbu Medical College, Bengbu , Anhui , China.,c Department of Pathology , Beth Israel Deaconess Medical Center , Harvard Medical School , Boston , MA , USA.,d The Cyrus Tang Hematology Center and Collaborative Innovation Center of Hematology , Soochow University , Suzhou , Jiangsu , China
| | - Jia Ma
- a Department of Biochemistry and Molecular Biology , Bengbu Medical College, Bengbu , Anhui , China
| | - Jun Xia
- a Department of Biochemistry and Molecular Biology , Bengbu Medical College, Bengbu , Anhui , China
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Xiao G, Wang X, Yu Y. CXCR4/ Let-7a Axis Regulates Metastasis and Chemoresistance of Pancreatic Cancer Cells Through Targeting HMGA2. Cell Physiol Biochem 2017; 43:840-851. [PMID: 28954272 DOI: 10.1159/000481610] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [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: 05/02/2017] [Accepted: 06/29/2017] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND/AIMS Pancreatic cancer cells (PCC) is one of the most risky cancers and gemcitabine (GEM) is the standard first-line drug for treating PCC. The PCC will develop drug resistance to GEM after a period of treatment. However, the detailed molecular mechanism of pathogenesis and drug resistance remains unresolved. METHODS we employed qRT-PCR and western blot to examine the expression level of CXCR4, let-7a and HMGA2. In addition, we used MTT assay to detect cell proliferation and transwell assay to measure migration and invasiveness. The expression level of epithelial marker E-cadherin and mesenthymal marker N-cadherin was detected by western blot. The apoptosis was determined using annexin V-FITC/PI apoptosis detection kit by flow cytometry. RESULTS we first proved that CXCR4 negatively regulated let-7a in PCC. Next, let-7a was confirmed to play crucial role in tumorigenesis, metastasis and drug resistance of pancreatic cancer cells Bxpc-3 and Panc-1 in vitro and in vivo. Finally, we identified HMGA2 as important downsteam target of let-7a in PCC and overexpression of HMGA2 restores cell proliferation, metastasis and chemosensitivity of GEM inhibited by let-7a. Conlusion: Taken together, we show an important signaling pathway involved in pathogenesis and drug resistance of PCC, thereby providing deeper insight into molecular mechanism by which CXCR4/let-7a regulates tumorigenesis and drug resistance of PCC. These findings will help us develop new strategies for diagnosis and treatment of PCC.
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Affiliation(s)
- Guangfa Xiao
- Department of General Surgery, Xiangya Hospital, Central South University, Changsha, China
| | - Xitao Wang
- Pancreatic Biliary Surgery, Xiangya Hospital, Changsha, China
| | - Yaqun Yu
- Department of Hepatobiliary and Pancreatic Surgery, The Affiliated Hospital of Guilin Medical College, Guilin, China
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Deng HX, Yu YY, Zhou AQ, Zhu JL, Luo LN, Chen WQ, Hu L, Chen GX. Yangzheng Sanjie decoction regulates proliferation and apoptosis of gastric cancer cells by enhancing let-7a expression. World J Gastroenterol 2017; 23:5538-5548. [PMID: 28852313 PMCID: PMC5558117 DOI: 10.3748/wjg.v23.i30.5538] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/22/2017] [Revised: 06/20/2017] [Accepted: 07/04/2017] [Indexed: 02/06/2023] Open
Abstract
AIM To explore the let-7a-mediated anti-cancer effect of Yangzheng Sanjie decoction (YZSJD) in gastric cancer (GC) cells.
METHODS YZSJD-containing serum (YCS) was prepared using traditional Chinese medicine serum pharmacology methods. After YCS treatment, cell proliferation and apoptosis were assessed by cell counting kit-8 assay and flow cytometry, respectively, and miRNA expression profiles were determined using qPCR arrays. Let-7a expression was examined by in situ hybridization in GC tissues and by qPCR in GC cells. c-Myc protein expression was detected by immunohistochemistry in GC tissues, and by Western blot in cell lines.
RESULTS YZSJD significantly inhibited proliferation and induced apoptosis in AGS and HS-746T GC cells. After treatment with YCS, the miRNA expression profiles were altered and the reduced let-7a levels in both cell lines were up-regulated, accompanied by a decrease in c-Myc expression. Moreover, decreased let-7a expression and increased c-Myc expression were observed during the progression of gastric mucosa cancerization.
CONCLUSION YZSJD inhibits proliferation and induces apoptosis of GC cells by restoring the aberrant expression of let-7a and c-Myc.
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Hu XP, Xie Q, Chen CF, Zhang W, Yu B. Let-7a Inhibits T-Cell Proliferation and IFN-γ Secretion by Down-Regulating STAT3 Expression in Patients with Psoriasis. Cell Physiol Biochem 2017; 42:115-125. [PMID: 28494466 DOI: 10.1159/000477120] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2016] [Accepted: 01/08/2017] [Indexed: 11/19/2022] Open
Abstract
OBJECTIVE This study aimed to explore the effects of STAT3 targeting by let-7a on T-cell proliferation and IFN-γ secretion in psoriasis. METHODS From January 2013 to January 2015, 40 patients with psoriasis (psoriasis group) and 38 volunteers undergoing plastic surgery (control group) were enrolled in this study. Pearson correlation analysis was performed to evaluate the correlation between let-7a and STAT3 expression. T-cells were isolated and subjected to different transfection methods. A dual luciferase reporter assay was carried out to confirm STAT3 as a target gene of let-7a. Let-7a, STAT3 and IFN-γ mRNA expression was detected by quantitative real-time fluorescent polymerase chain reaction (qRT-PCR), and pSTAT3 protein levels were determined by Western blot. T-cell proliferation was evaluated with a cell counting kit-8 (CCK-8) assay. RESULTS The level of STAT3 mRNA and pSTAT3 was higher, but let-7a expression was lower in the psoriasis group than the control group. Pearson correlation analysis indicated that STAT3 expression was negatively correlated with let-7a expression. T-cells transfected with inhibitors exhibited greater IFN-γ mRNA expression and T-cell proliferation than transfected T-cells and T-cells transfected with a non-sense sequence, while T-cells transfected with let-7a mimics exhibited lower IFN-γ mRNA expression and T-cell proliferation than transfected T-cells and T-cells transfected with a non-sense sequence. This suggested that siRNA-STAT3 could reverse the increase in IFN-y mRNA expression and T-cell proliferation induced by let-7a inhibitors. CONCLUSION Our results demonstrated that let-7a inhibits T-cell proliferation and IFN-γ secretion by down-regulating STAT3 in psoriasis.
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Affiliation(s)
- Xiao-Ping Hu
- Department of Dermatology, Peking University Shenzhen Hospital, Shenzhen, China
| | - Qian Xie
- Department of endocrinology, Peking University Shenzhen Hospital, Shenzhen, China
| | - Chao-Feng Chen
- Department of Dermatology, Peking University Shenzhen Hospital, Shenzhen, China
| | - Wei Zhang
- Department of Dermatology, Peking University Shenzhen Hospital, Shenzhen, China
| | - Bo Yu
- Department of Dermatology, Peking University Shenzhen Hospital, Shenzhen, China
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Lee YR, Yeh SF, Ruan XM, Zhang H, Hsu SD, Huang HD, Hsieh CC, Lin YS, Yeh TM, Liu HS, Gan DD. Honeysuckle aqueous extract and induced let-7a suppress dengue virus type 2 replication and pathogenesis. J Ethnopharmacol 2017; 198:109-121. [PMID: 28052239 DOI: 10.1016/j.jep.2016.12.049] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [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: 06/15/2016] [Revised: 12/07/2016] [Accepted: 12/31/2016] [Indexed: 05/28/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Honeysuckle (Lonicera japonica Thunb.), a traditional Chinese herb, has widely been used to treat pathogen infection. However, the underlying-mechanism remains elusive. AIMS OF THE STUDY To reveal the host microRNA (miRNA) profile with the anti-viral activity after honeysuckle treatment. MATERIALS AND METHODS Here we reveal the differentially expressed miRNAs by Solexa® deep sequencing from the blood of human and mice after the aqueous extract treatment. Among these overexpressed innate miRNAs both in human and mice, let-7a is able to target the NS1 region (nt 3313-3330) of dengue virus (DENV) serotypes 1, 2 and 4 predicated by the target predication software. RESULTS We confirmed that let-7a could target DENV2 at the predicated NS1 sequence and suppress DENV2 replication demonstrated by luciferase-reporter activity, RT-PCR, real-time PCR, Western blotting and plaque assay. ICR-suckling mice consumed honeysuckle aqueous extract either before or after intracranial injection with DENV2 showed decreased levels of NS1 RNA and protein expression accompanied with alleviated disease symptoms, decreased virus load, and prolonged survival time. Similar results were observed when DENV2-infected mice were intracranially injected with let-7a. CONCLUSION We reveal that honeysuckle attenuates DENV replication and related pathogenesis in vivo through induction of let-7a expression. This study opens a new direction for prevention and treatment of DENV infection through induction of the innate miRNA let-7a by honeysuckle.
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Affiliation(s)
- Ying-Ray Lee
- Department of Medical Research, Chiayi Christian Hospital, Chiayi, Taiwan
| | - Siao-Fen Yeh
- Department of Microbiology and Immunology, College of Medicine, National Cheng Kung University, Tainan 70101, Taiwan
| | - Xiao-Ming Ruan
- College of Biological Life Science, Nanjing University, Nanjing 210023, PR China
| | - Hao Zhang
- College of Biological Life Science, Nanjing University, Nanjing 210023, PR China
| | - Sheng-Da Hsu
- Institute of Bioinformatics and Systems Biology, National Chiao Tung University, Hsinchu, Taiwan
| | - Hsien-Da Huang
- Institute of Bioinformatics and Systems Biology, National Chiao Tung University, Hsinchu, Taiwan; Department of Biological Science and Technology, National Chiao Tung University, Hsinchu, Taiwan; Molecular Bioinformatics Center, National Chiao Tung University, Hsinchu, Taiwan
| | - Chang-Chi Hsieh
- Department of Animal Science and Biotechnology, Tunghai University, Taichung, Taiwan
| | - Yee-Shin Lin
- Department of Microbiology and Immunology, College of Medicine, National Cheng Kung University, Tainan 70101, Taiwan
| | - Trai-Ming Yeh
- Department of Medical Laboratory Science and Biotechnology, College of Medicine, National Cheng Kung University, Tainan 70101, Taiwan
| | - Hsiao-Sheng Liu
- Department of Microbiology and Immunology, College of Medicine, National Cheng Kung University, Tainan 70101, Taiwan.
| | - Dai-Di Gan
- College of Biological Life Science, Nanjing University, Nanjing 210023, PR China.
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Deng M, Hou J, Hu J, Wang S, Chen M, Chen L, Ju Y, Li C, Meng S. Hepatitis B virus mRNAs functionally sequester let-7a and enhance hepatocellular carcinoma. Cancer Lett 2016; 383:62-72. [PMID: 27693636 DOI: 10.1016/j.canlet.2016.09.028] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [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: 05/19/2016] [Revised: 09/21/2016] [Accepted: 09/21/2016] [Indexed: 02/07/2023]
Abstract
Hepatitis B virus (HBV) infection induces hepatocarcinogenesis and malignant progression, yet global effects of the redundant viral mRNAs produced during infection are unexplored. Here, microRNA (miRNA) target prediction and whole genome expression analysis revealed that HBV pre-C/C mRNA leads to upregulation of multiple let-7a targeted genes. A let-7a complementary region from nt 86 to 108 in the HBV genome was then identified in HBV pre-C/C, pre-S, and S mRNAs. The let-7a sequestration effect by HBV mRNAs was observed under transfection and virus infection, which is dependent on the let-7a response sequence. Moreover, we found reduced AGO2 binding, as well as functional mRNA and protein de-repression of let-7a targets (e.g., c-myc, K-RAS, and CCR7), upon viral mRNA expression. Let-7a levels in the liver were significantly decreased in hepatocellular carcinoma (HCC) patients with HBV infection and were negatively correlated with intrahepatic pre-S2 mRNA levels. Finally, both in vitro and in vivo studies demonstrated that let-7a inhibition by HBV mRNAs resulted in enhanced HCC cell colony formation and tumor growth, providing evidence of the oncogenic potential of HBV mRNAs.
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Affiliation(s)
- Mengmeng Deng
- School of Life Sciences, University of Science and Technology of China, Hefei, China; CAS Key Laboratory of Pathogenic Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences (CAS), Beijing, China
| | - Junwei Hou
- CAS Key Laboratory of Pathogenic Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences (CAS), Beijing, China
| | - Jun Hu
- CAS Key Laboratory of Pathogenic Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences (CAS), Beijing, China
| | - Shuo Wang
- CAS Key Laboratory of Pathogenic Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences (CAS), Beijing, China
| | - Mi Chen
- CAS Key Laboratory of Pathogenic Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences (CAS), Beijing, China
| | - Lizhao Chen
- CAS Key Laboratory of Pathogenic Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences (CAS), Beijing, China
| | - Ying Ju
- CAS Key Laboratory of Pathogenic Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences (CAS), Beijing, China
| | - Changfei Li
- CAS Key Laboratory of Pathogenic Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences (CAS), Beijing, China.
| | - Songdong Meng
- CAS Key Laboratory of Pathogenic Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences (CAS), Beijing, China; College of Life Sciences, University of Chinese Academy of Sciences, Beijing, China.
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Li B, Chen P, Chang Y, Qi J, Fu H, Guo H. Let-7a inhibits tumor cell growth and metastasis by directly targeting RTKN in human colon cancer. Biochem Biophys Res Commun 2016; 478:739-45. [PMID: 27498032 DOI: 10.1016/j.bbrc.2016.08.018] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2016] [Accepted: 08/03/2016] [Indexed: 11/29/2022]
Abstract
Colorectal cancer (CRC) is the third most common cancer worldwide, with high morbidity. MicroRNAs (miRNAs) are endogenous small RNAs that play important roles in regulating multiple biological and pathologic processes. The differential expression of miRNAs in CRC was first reported in 2003. Accumulated evidence indicates that lethal-7a (let-7a, miRNA) generally functions as a tumor suppressor in several human cancers. However, the role of let-7a in human colon cancer remains unclear. The aim of this study was to investigate the biological functions of let-7a and its potential role in colon cancer. We first discovered that let-7a level was significantly decreased in colon cancer tissues and cell lines (HT-29, HCT-116, LoVo, SW480, and SW620). To explore the effects of let-7a on colon cancer, let-7a over-expressed HCT-116 and SW620 cells were constructed. Further studies demonstrated that over-expressed let-7a could remarkably inhibit HCT-116 and SW620 cell growth and metastasis by directly down-regulating Rhotekin (RTKN). When RTKN was reintroduced into let-7a mimic transfected HCT-116 or SW620 cells, the inhibition effects of let-7a on colon cancer cell growth and metastasis were markedly reversed. In conclusion, our research shows that let-7a can inhibit tumor cell growth and metastasis by directly targeting RTKN in human colon cancer.
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Affiliation(s)
- Bin Li
- Department of Oncology, The First Affiliated Hospital of Xi'an Medical University, Shaanxi, Xi'an 710077, China.
| | - Peng Chen
- Institution of Basic Medical Science, Xi'an Medical University, Shaanxi, Xi'an 710021, China; School of Life Sciences, Northwest University, Shaanxi, Xi'an 710069, China
| | - Yanxiang Chang
- Department of Oncology, The First Affiliated Hospital of Xi'an Medical University, Shaanxi, Xi'an 710077, China
| | - Jingpeng Qi
- Department of Oncology, The First Affiliated Hospital of Xi'an Medical University, Shaanxi, Xi'an 710077, China
| | - Hui Fu
- Institution of Basic Medical Science, Xi'an Medical University, Shaanxi, Xi'an 710021, China
| | - Huifang Guo
- Institution of Basic Medical Science, Xi'an Medical University, Shaanxi, Xi'an 710021, China
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Zhang Z, Li Y, Huang L, Xiao Q, Chen X, Zhong J, Chen Y, Yang D, Han Z, Shu Y, Dai M, Cao K. Let-7a suppresses macrophage infiltrations and malignant phenotype of Ewing sarcoma via STAT3/NF-κB positive regulatory circuit. Cancer Lett 2016; 374:192-201. [PMID: 26902422 DOI: 10.1016/j.canlet.2016.02.027] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [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: 12/03/2015] [Revised: 02/13/2016] [Accepted: 02/16/2016] [Indexed: 12/17/2022]
Abstract
The interaction between tumors cells, tumor-derived humoral factors and the bone marrow in the bone niches has been shown to be essential for bone tumor initiation and promotion. Among the tumor stromal cells, tumor-associated macrophages (TAMs) are usually the most abundant immune population. Previously, we reported that let-7a functions as a tumor suppressor in ES. Herein, we found that the suppressive effects are not only limited on the malignant phenotype of tumor cells but also on the regulation of macrophage infiltration. We observed that the let-7a expression is negatively related to macrophage infiltrations in ES. Moreover, overexpression of putative ts-miRNA let-7a significantly suppressed the recruitment of PBMCs in vitro and decreased the macrophage infiltrations in ES-xenografted tumors in vivo. Most importantly, a positive regulatory feedback loop consisting of let-7a, signal transducer and activator of transcription 3 (STAT3), and nuclear factor-kappa B (NF-κB) (let-7a/STAT3/NF-κB) was involved in let-7a-mediated suppressive effects. These data might provide evidence of a novel intracellular signaling network function in ES pathogenesis, and manipulating this novel feedback loop will have therapeutic potential for ES patients.
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Affiliation(s)
- Zhongzu Zhang
- Department of Orthopedics, The First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi 330006, China; Department of Orthopedics, The Yongchuan Affiliated Hospital of Chongqing Medical University, Chongqing 402160, China
| | - Yunyun Li
- Department of Gynecology and Obstetrics, The Yongchuan Affiliated Hospital of Chongqing Medical University, Chongqing 402160, China
| | - Lu Huang
- Department of Children Health and Care, Jiangxi Maternal and Child Health Hospital, Nanchang, Jiangxi 330006, China
| | - Qianren Xiao
- Department of Orthopedics, The First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi 330006, China
| | - Xiang Chen
- Department of Orthopedics, The First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi 330006, China
| | - Junlong Zhong
- Department of Orthopedics, The First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi 330006, China
| | - Yiwei Chen
- Department of Orthopedics, The First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi 330006, China
| | - Dong Yang
- Department of Orthopedics, The First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi 330006, China
| | - Zhimin Han
- Department of Orthopedics, The First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi 330006, China
| | - Yong Shu
- Department of Orthopedics, The First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi 330006, China
| | - Min Dai
- Department of Orthopedics, The First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi 330006, China
| | - Kai Cao
- Department of Orthopedics, The First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi 330006, China.
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Li Y, Zhang X, Chen D, Ma C. Let-7a suppresses glioma cell proliferation and invasion through TGF-β/Smad3 signaling pathway by targeting HMGA2. Tumour Biol 2016; 37:8107-19. [PMID: 26715270 DOI: 10.1007/s13277-015-4674-6] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2015] [Accepted: 12/16/2015] [Indexed: 12/17/2022] Open
Abstract
It has been shown that let-7a was associated with the tumorigenesis of glioma. Our study was designed to infer how let-7a targets high-mobility AT-hook 2 (HMGA2) and suppresses glioma cell proliferation, invasion, and migration. Glioma tissues from 60 glioma patients and 10 normal brain tissues were collected in this study. Real-time quantitative reverse transcription-PCR (qRT-PCR) and in situ hybridization were used to detect the expression levels of let-7a in tissues and cells. The HMGA2 and the proteins related to transforming growth factor-beta (TGF-β)/Smad3 signaling pathway were measured by immunohistochemistry and western blot. Glioma U87 cells were transfected with either let-7a mimics, HMGA2 small interfering RNA (siRNA), let-7a mimics + HMGA2, HMGA2, or scramble. A cell counting kit-8 (CCK-8) assay was used to detect and compare the difference among various transfection groups. Glioma tumor xenograft models on mice were built to evaluate the effects of let-7a and HMGA2 siRNA on glioma tumors in vivo. The expression level of let-7a significantly downregulated in glioma tissues, while the HMGA2 positive expression rate notably increased compared with those in normal brain tissues (all P < 0.05). Moreover, the expression levels of let-7a and HMGA2 were correlated with glioma grades (all P < 0.05). The proliferation of U87 cells transfected with let-7a mimics or HMGA2 siRNA was significantly inhibited in comparison to the blank control group and the apoptosis rates of U87 cells transfected with let-7a mimics or HMGA2 siRNA were significantly higher than those in the blank control group (all P < 0.05). Let-7a or HMGA2 siRNA could remarkably attenuate the invasion and migration ability of glioma cells (all P < 0.05). Apart from that, over-expressed exogenous HMGA2 could reverse the inhibition of glioma cell metastasis and proliferation induced by let-7a. As suggested by immunohistochemistry and western blot, the expression levels of TGF-β1 and p-Smad3 significantly decreased compared with the blank or scramble group (all P < 0.05). Thus, let-7a and HMGA2 siRNA could effectively suppress the growth of tumors in glioma xenograft models. Let-7a may suppress the proliferation and invasion of glioma cells through mediating TGF-β/Smad3 signaling pathway by targeting HMGA2.
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He FC, Meng WW, Qu YH, Zhou MX, He J, Lv P, Ming L. Expression of circulating microRNA-20a and let-7a in esophageal squamous cell carcinoma. World J Gastroenterol 2015; 21:4660-4665. [PMID: 25914476 PMCID: PMC4402314 DOI: 10.3748/wjg.v21.i15.4660] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/01/2014] [Revised: 01/19/2015] [Accepted: 02/11/2015] [Indexed: 02/06/2023] Open
Abstract
AIM: To investigate the expressions of microRNA-20a (miR-20a) and let-7a in esophageal squamous cell carcinoma (ESCC) and their diagnostic value.
METHODS: Seventy patients with ESCC and 40 healthy subjects were enrolled to investigate the expression of miR-20a and let-7a using quantitative real-time PCR. The expression of miR-20a and let-7a was compared between ESCC patients and healthy subjects. The plasma levels of miR-20a and let-7a in relation to patient clinicopathologic parameters, the receiver operating characteristic (ROC) curve, and the sensitivity and specificity of miR-20a and let-7a in ESCC diagnosis were analyzed.
RESULTS: Plasma levels of miR-20a were significantly higher in ESCC patients than in healthy controls, and plasma levels of let-7 were lower in ESCC patients than in healthy controls (both P < 0.05). The area under the ROC curve of miR-20a was 0.767 (95%CI: 0.677-0.857; P < 0.001), when the cut-off value was set at 4.77, the sensitivity and specificity were 64.3% and 75.0%, respectively. The area under the ROC curve of let-7a was 0.829 (95%CI: 0.754-0.904; P < 0.001), when the cut-off value was set at 6.22, the sensitivity and specificity were 74.3% and 85.0%, respectively. Thus, the sensitivity and specificity of let-7a were higher than those of miR-20a. The median relative plasma expression of let-7a in clinical stage III/IV (0.24) was lower than that in stage I/II (0.42), while the expression of miR-20a according to stage was not statistically different. The expressions of miR-20a and let-7a were not related to gender, age, tumor diameter, tumor grade, or pathologic stage.
CONCLUSION: Plasma miR-20a and let-7a levels are significantly altered in patients with ESCC and can be used as potential biomarkers in the diagnosis of ESCC.
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Cao H, Hu X, Zhang Q, Wang J, Li J, Liu B, Shao Y, Li X, Zhang J, Xin S. Upregulation of let-7a inhibits vascular smooth muscle cell proliferation in vitro and in vein graft intimal hyperplasia in rats. J Surg Res 2014; 192:223-33. [PMID: 24953987 DOI: 10.1016/j.jss.2014.05.045] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [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: 01/15/2014] [Revised: 05/09/2014] [Accepted: 05/16/2014] [Indexed: 11/28/2022]
Abstract
BACKGROUND Proliferation of vascular smooth muscle cells (VSMCs) is a crucial event in the pathogenesis of intimal hyperplasia, which is the main cause of restenosis after vascular reconstruction. In this study, we assessed the impact of let-7a microRNA (miRNA) on the proliferation of VSMCs. METHODS Using miRNA microarrays analysis for miRNA expression in the vein graft model. Lentiviral vector-mediated let-7a was transfected into the vein grafts. In situ hybridization was performed to detect let-7a. Cultured rat VSMCs were transfected with let-7a mimics for different periods of time. Cell proliferation, migration and cell cycle activity were monitored following transfection of the let-7a mimics. Immunohistochemical and Western blotting analysis the expression levels of c-myc and K-ras. RESULTS We found that let-7a was the most downregulated miRNA in the vein graft model. In vivo proliferation of VSMCs was assessed in a rat model of venous graft intimal hyperplasia. Let-7a was found to localize mainly to the VSMCs. Let-7a miRNA expression was increased in VSMCs in the neointima of the let-7a treated group. Intimal hyperplasia was suppressed by upregulation of let-7a via lentiviral vector-mediated mimics. In cultured VSMCs, the expression of let-7a increased upon starving, and the upregulation of let-7a miRNA significantly decreased cell proliferation and migration. Immunohistochemical and Western blotting analysis demonstrated that treatment with let-7a mimics resulted in decreased expression levels of c-myc and K-ras. CONCLUSIONS The results indicate that let-7a miRNA is a novel regulator of VSMC proliferation in intimal hyperplasia. These findings suggest that let-7a miRNA is a promising therapeutic target for the prevention of intimal hyperplasia.
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Affiliation(s)
- Hui Cao
- Department of Vascular Surgery, The First Affiliated Hospital, China Medical University, Shenyang, China
| | - Xinhua Hu
- Department of Vascular Surgery, The First Affiliated Hospital, China Medical University, Shenyang, China.
| | - Qiang Zhang
- Department of Vascular Surgery, The First Affiliated Hospital, China Medical University, Shenyang, China
| | - Junpeng Wang
- Department of Vascular Surgery, The First Affiliated Hospital, China Medical University, Shenyang, China
| | - Jun Li
- Department of Vascular Surgery, The First Affiliated Hospital, China Medical University, Shenyang, China
| | - Bing Liu
- Department of Vascular Surgery, The First Affiliated Hospital, China Medical University, Shenyang, China
| | - Yang Shao
- Department of Vascular Surgery, The First Affiliated Hospital, China Medical University, Shenyang, China
| | - Xi Li
- Department of Vascular Surgery, The First Affiliated Hospital, China Medical University, Shenyang, China
| | - Jian Zhang
- Department of Vascular Surgery, The First Affiliated Hospital, China Medical University, Shenyang, China
| | - Shijie Xin
- Department of Vascular Surgery, The First Affiliated Hospital, China Medical University, Shenyang, China
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Bai M, Zhu XZ, Zhang Y, Zhang S, Zhang L, Xue L, Zhong M, Zhang X. Anhedonia was associated with the dysregulation of hippocampal HTR4 and microRNA Let-7a in rats. Physiol Behav 2014. [PMID: 24582667 DOI: 10.1016/j.physbeh.2014.02] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
OBJECTIVE Depression is a serious mental illness. However, the molecular mechanisms responsible for the development of depression remain unknown. METHODS In this study, animal models of depression were established using maternal deprivation (MD) and chronic unpredictable stress (CUPS). Behavioral performance of rats was monitored by open field test, forced swim test, and sucrose consumption test. The expression of serotonin receptor-4 (Htr4) mRNA and Let-7a microRNA was detected by real-time PCR, while Htr4 protein level was measured by Western blot. RESULTS In the open field test, rats subjected to MD and CUPS exhibited significant decreases in vertical activity. CUPS rats spent less time in the central area and excreted more fecal pellets than MD and control rats. In the forced swim and sucrose consumption tests, CUPS and MD rats exhibited significantly longer floating time and consumed less sucrose than control rats. MD rats exhibited significantly shorter floating time and consumed less sucrose than CUPS rats. MD rats showed significantly lower Htr4 mRNA and protein expression and significantly higher Let-7a level in the hippocampus than control rats. Htr4 mRNA and protein expression negatively correlated with Let-7a expression. Htr4 mRNA expression positively correlated with sucrose preference rate, while Let-7a expression negatively correlated with the sucrose preference rate. CONCLUSION Anhedonia, not despair or a decline in exploratory interest, may be associated with upregulation of Let-7a and downregulation of Htr4 expression in the hippocampus. The hippocampal Htr4 level may be regulated by Let-7a in rats.
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Affiliation(s)
- Mei Bai
- Medical Psychological Institute, Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, China
| | - Xiong-Zhao Zhu
- Medical Psychological Institute, Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, China; National Technology Institute of Psychiatry, Central South University, Changsha, 410011, P.R. China.
| | - Yi Zhang
- Medical Psychological Institute, Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, China; Key Laboratory of Psychiatry and Mental Health of Hunan Province, Central South University, Changsha, 410011, P.R. China
| | - Sheng Zhang
- Medical Psychological Institute, Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, China; Key Laboratory of Psychiatry and Mental Health of Hunan Province, Central South University, Changsha, 410011, P.R. China
| | - Li Zhang
- Medical Psychological Institute, Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, China; Key Laboratory of Psychiatry and Mental Health of Hunan Province, Central South University, Changsha, 410011, P.R. China
| | - Liang Xue
- Medical Psychological Institute, Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, China; Key Laboratory of Psychiatry and Mental Health of Hunan Province, Central South University, Changsha, 410011, P.R. China
| | - Mingtian Zhong
- Medical Psychological Institute, Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, China; Key Laboratory of Psychiatry and Mental Health of Hunan Province, Central South University, Changsha, 410011, P.R. China
| | - Xiuwu Zhang
- Departments of Radiation Oncology, University of Maryland, School of Medicine, Baltimore 20221, USA
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Bai M, Zhu XZ, Zhang Y, Zhang S, Zhang L, Xue L, Zhong M, Zhang X. Anhedonia was associated with the dysregulation of hippocampal HTR4 and microRNA Let-7a in rats. Physiol Behav 2014; 129:135-41. [PMID: 24582667 DOI: 10.1016/j.physbeh.2014.02.035] [Citation(s) in RCA: 38] [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] [Received: 01/09/2014] [Revised: 02/07/2014] [Accepted: 02/15/2014] [Indexed: 12/17/2022]
Abstract
OBJECTIVE Depression is a serious mental illness. However, the molecular mechanisms responsible for the development of depression remain unknown. METHODS In this study, animal models of depression were established using maternal deprivation (MD) and chronic unpredictable stress (CUPS). Behavioral performance of rats was monitored by open field test, forced swim test, and sucrose consumption test. The expression of serotonin receptor-4 (Htr4) mRNA and Let-7a microRNA was detected by real-time PCR, while Htr4 protein level was measured by Western blot. RESULTS In the open field test, rats subjected to MD and CUPS exhibited significant decreases in vertical activity. CUPS rats spent less time in the central area and excreted more fecal pellets than MD and control rats. In the forced swim and sucrose consumption tests, CUPS and MD rats exhibited significantly longer floating time and consumed less sucrose than control rats. MD rats exhibited significantly shorter floating time and consumed less sucrose than CUPS rats. MD rats showed significantly lower Htr4 mRNA and protein expression and significantly higher Let-7a level in the hippocampus than control rats. Htr4 mRNA and protein expression negatively correlated with Let-7a expression. Htr4 mRNA expression positively correlated with sucrose preference rate, while Let-7a expression negatively correlated with the sucrose preference rate. CONCLUSION Anhedonia, not despair or a decline in exploratory interest, may be associated with upregulation of Let-7a and downregulation of Htr4 expression in the hippocampus. The hippocampal Htr4 level may be regulated by Let-7a in rats.
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Affiliation(s)
- Mei Bai
- Medical Psychological Institute, Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, China
| | - Xiong-Zhao Zhu
- Medical Psychological Institute, Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, China; National Technology Institute of Psychiatry, Central South University, Changsha, 410011, P.R. China.
| | - Yi Zhang
- Medical Psychological Institute, Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, China; Key Laboratory of Psychiatry and Mental Health of Hunan Province, Central South University, Changsha, 410011, P.R. China
| | - Sheng Zhang
- Medical Psychological Institute, Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, China; Key Laboratory of Psychiatry and Mental Health of Hunan Province, Central South University, Changsha, 410011, P.R. China
| | - Li Zhang
- Medical Psychological Institute, Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, China; Key Laboratory of Psychiatry and Mental Health of Hunan Province, Central South University, Changsha, 410011, P.R. China
| | - Liang Xue
- Medical Psychological Institute, Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, China; Key Laboratory of Psychiatry and Mental Health of Hunan Province, Central South University, Changsha, 410011, P.R. China
| | - Mingtian Zhong
- Medical Psychological Institute, Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, China; Key Laboratory of Psychiatry and Mental Health of Hunan Province, Central South University, Changsha, 410011, P.R. China
| | - Xiuwu Zhang
- Departments of Radiation Oncology, University of Maryland, School of Medicine, Baltimore 20221, USA
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Abstract
AIM: To establish an accurate and rapid stem-loop reverse transcriptional real-time PCR (RT-PCR) method to quantify human let-7a miRNA in gastric cancer.
METHODS: According to the sequence of let-7a miRNA, the stem-loop reverse transcriptional primer, the primers and quantitative MGB probes of real-time PCR were designed and synthesized. The dynamic range and the sensitivity of quantitative reverse transcriptional real-time PCR were determined. The levels of let-7a miRNA were examined in 32 gastric carcinoma samples by stem-loop RT-PCR method.
RESULTS: The dynamic range and sensitivity of the let-7a miRNA quantification scheme were evaluated, the result showed the assay could precisely detect 10 copies of mature let-7a miRNA in as few as 0.05 ng of total RNA of gastric mucosa. The results of specificity analysis showed no fluorescence signal occurred even though 50 ng of human genomic DNA was added to the reverse transcription (RT) reaction. The expression level of let-7a miRNA in gastric tumor tissues was significantly lower compared to normal tissues in 14 samples from 32 patients.
CONCLUSION: The stem-loop RT-PCR is a reliable method to detect let-7a miRNA which may play an important role in the development of gastric carcinoma.
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Affiliation(s)
- Hong-He Zhang
- Diagnostic Laboratory, Hangzhou First People's Hospital, Hangzhou 310006, Zhejiang Province, China.
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