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Wang Q, Xiong F, Wu G, Wang D, Liu W, Chen J, Qi Y, Wang B, Chen Y. SMAD Proteins in TGF-β Signalling Pathway in Cancer: Regulatory Mechanisms and Clinical Applications. Diagnostics (Basel) 2023; 13:2769. [PMID: 37685308 PMCID: PMC10487229 DOI: 10.3390/diagnostics13172769] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2023] [Revised: 08/17/2023] [Accepted: 08/25/2023] [Indexed: 09/10/2023] Open
Abstract
Suppressor of mother against decapentaplegic (SMAD) family proteins are central to one of the most versatile cytokine signalling pathways in metazoan biology, the transforming growth factor-β (TGF-β) pathway. The TGF-β pathway is widely known for its dual role in cancer progression as both an inhibitor of tumour cell growth and an inducer of tumour metastasis. This is mainly mediated through SMAD proteins and their cofactors or regulators. SMAD proteins act as transcription factors, regulating the transcription of a wide range of genes, and their rich post-translational modifications are influenced by a variety of regulators and cofactors. The complex role, mechanisms, and important functions of SMAD proteins in tumours are the hot topics in current oncology research. In this paper, we summarize the recent progress on the effects and mechanisms of SMAD proteins on tumour development, diagnosis, treatment and prognosis, and provide clues for subsequent research on SMAD proteins in tumours.
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Affiliation(s)
- Qi Wang
- Department of Biliary-Pancreatic Surgery, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430000, China; (Q.W.); (F.X.); (G.W.); (D.W.); (W.L.); (J.C.); (B.W.)
| | - Fei Xiong
- Department of Biliary-Pancreatic Surgery, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430000, China; (Q.W.); (F.X.); (G.W.); (D.W.); (W.L.); (J.C.); (B.W.)
| | - Guanhua Wu
- Department of Biliary-Pancreatic Surgery, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430000, China; (Q.W.); (F.X.); (G.W.); (D.W.); (W.L.); (J.C.); (B.W.)
| | - Da Wang
- Department of Biliary-Pancreatic Surgery, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430000, China; (Q.W.); (F.X.); (G.W.); (D.W.); (W.L.); (J.C.); (B.W.)
| | - Wenzheng Liu
- Department of Biliary-Pancreatic Surgery, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430000, China; (Q.W.); (F.X.); (G.W.); (D.W.); (W.L.); (J.C.); (B.W.)
| | - Junsheng Chen
- Department of Biliary-Pancreatic Surgery, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430000, China; (Q.W.); (F.X.); (G.W.); (D.W.); (W.L.); (J.C.); (B.W.)
| | - Yongqiang Qi
- Key Laboratory of Laparoscopic Technology of Zhejiang Province, Department of General Surgery, Sir Run-Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou 310016, China;
| | - Bing Wang
- Department of Biliary-Pancreatic Surgery, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430000, China; (Q.W.); (F.X.); (G.W.); (D.W.); (W.L.); (J.C.); (B.W.)
| | - Yongjun Chen
- Department of Biliary-Pancreatic Surgery, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430000, China; (Q.W.); (F.X.); (G.W.); (D.W.); (W.L.); (J.C.); (B.W.)
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Zhang C, Ren L, Zhang H, Yang S, Deng M, He L, Cao R, Zhao C, Xia J. SESN1, negatively regulated by miR-377-3p, suppresses invasive growth of head and neck squamous cell carcinoma by interaction with SMAD3. Hum Cell 2022; 35:1100-1113. [PMID: 35622213 DOI: 10.1007/s13577-022-00719-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2021] [Accepted: 05/06/2022] [Indexed: 11/30/2022]
Abstract
Sestrin 1 (SESN1) is a stress-inducible protein that suppresses tumors in numerous cancers. However, the function of SESN1 in head and neck squamous cell carcinoma (HNSCC) is not clear and needs to be elucidated. Here, SESN1 expression was downregulated in HNSCC tissues and cell lines, and low SESN1 expression was positively correlated with poor prognosis in patients with HNSCC. Moreover, SESN1 overexpression inhibited the proliferation, migration, and invasion of HSC-6 and CAL-33 cells. In addition, the binding relationship between miR-377-3p and SESN1 was confirmed using luciferase reporter and RNA immunoprecipitation assays. Downregulation of SESN1 expression was consistent with high levels of miR-377-3p in HNSCC tissues. Linear regression analysis of clinical HNSCC tissues revealed a negative correlation between miR-377-3p and SESN1 expression. Moreover, co-immunoprecipitation mass spectrometry analysis revealed that SESN1 interacted with SMAD3, and SMAD3 reversed the increased proliferation, migration, and invasion of HSC-6 and CAL-33 cells caused by SESN1 knockdown. In conclusion, these findings provide evidence that SESN1 functions as a tumor suppressor and reveal the miR-377-3p-SESN1-SMAD3 regulatory axis that contributes to proliferation, migration, and invasion in HNSCC development, which may represent an interventional target for HNSCC therapy.
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Affiliation(s)
- Chi Zhang
- Hostpital of Stomatology, Sun Yat-Sen University, No.55 Linyuan Xi Road, Guangzhou, People's Republic of China.,Guangdong Provincial Key Laboratory of Stomatology, Guanghua School of Stomatology, Sun Yat-Sen University, Guangzhou, 510055, Guangdong, People's Republic of China
| | - Lin Ren
- Hostpital of Stomatology, Sun Yat-Sen University, No.55 Linyuan Xi Road, Guangzhou, People's Republic of China.,Guangdong Provincial Key Laboratory of Stomatology, Guanghua School of Stomatology, Sun Yat-Sen University, Guangzhou, 510055, Guangdong, People's Republic of China
| | - Hongjian Zhang
- Hostpital of Stomatology, Sun Yat-Sen University, No.55 Linyuan Xi Road, Guangzhou, People's Republic of China.,Guangdong Provincial Key Laboratory of Stomatology, Guanghua School of Stomatology, Sun Yat-Sen University, Guangzhou, 510055, Guangdong, People's Republic of China
| | - Shiwen Yang
- Hostpital of Stomatology, Sun Yat-Sen University, No.55 Linyuan Xi Road, Guangzhou, People's Republic of China.,Guangdong Provincial Key Laboratory of Stomatology, Guanghua School of Stomatology, Sun Yat-Sen University, Guangzhou, 510055, Guangdong, People's Republic of China
| | - Miao Deng
- Hostpital of Stomatology, Sun Yat-Sen University, No.55 Linyuan Xi Road, Guangzhou, People's Republic of China.,Guangdong Provincial Key Laboratory of Stomatology, Guanghua School of Stomatology, Sun Yat-Sen University, Guangzhou, 510055, Guangdong, People's Republic of China
| | - Lihong He
- Hostpital of Stomatology, Sun Yat-Sen University, No.55 Linyuan Xi Road, Guangzhou, People's Republic of China.,Guangdong Provincial Key Laboratory of Stomatology, Guanghua School of Stomatology, Sun Yat-Sen University, Guangzhou, 510055, Guangdong, People's Republic of China
| | - Ruoyan Cao
- Hostpital of Stomatology, Sun Yat-Sen University, No.55 Linyuan Xi Road, Guangzhou, People's Republic of China.,Guangdong Provincial Key Laboratory of Stomatology, Guanghua School of Stomatology, Sun Yat-Sen University, Guangzhou, 510055, Guangdong, People's Republic of China
| | - Chuanjiang Zhao
- Hostpital of Stomatology, Sun Yat-Sen University, No.55 Linyuan Xi Road, Guangzhou, People's Republic of China. .,Guangdong Provincial Key Laboratory of Stomatology, Guanghua School of Stomatology, Sun Yat-Sen University, Guangzhou, 510055, Guangdong, People's Republic of China.
| | - Juan Xia
- Hostpital of Stomatology, Sun Yat-Sen University, No.55 Linyuan Xi Road, Guangzhou, People's Republic of China. .,Guangdong Provincial Key Laboratory of Stomatology, Guanghua School of Stomatology, Sun Yat-Sen University, Guangzhou, 510055, Guangdong, People's Republic of China.
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Durślewicz J, Klimaszewska-Wiśniewska A, Jóźwicki J, Antosik P, Smolińska-Świtała M, Gagat M, Kowalewski A, Grzanka D. Prognostic Significance of TLR2, SMAD3 and Localization-dependent SATB1 in Stage I and II Non-Small-Cell Lung Cancer Patients. Cancer Control 2021; 28:10732748211056697. [PMID: 34818944 PMCID: PMC8640983 DOI: 10.1177/10732748211056697] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
This study aimed to explore the prognostic value of SATB1, SMAD3, and TLR2 expression in non-small-cell lung carcinoma patients with clinical stages I-II. To investigate, we evaluated immunohistochemical staining to each of these markers using tissue sections from 69 patients from our cohort and gene expression data for The Cancer Genome Atlas (TCGA) cohort. We found that, in our cohort, high expression levels of nuclear SATB1n and SMAD3 were independent prognostic markers for better overall survival (OS) in NSCLC patients. Interestingly, expression of cytoplasmic SATB1c exhibited a significant but inverse association with survival rate, and it was an independent predictor of unfavorable prognosis. Likewise, TLR2 was a negative outcome biomarker for NSCLC even when adjusting for covariates. Importantly, stratification of NSCLCs with respect to combined expression of the three biomarkers allowed us to identify subgroups of patients with the greatest difference in duration of survival. Specifically, expression profile of SATB1n-high/SMAD3high/TLR2low was associated with the best OS, and it was superior to each single protein alone in predicting patient prognosis. Furthermore, based on the TCGA dataset, we found that overexpression of SATB1 mRNA was significantly associated with better OS, whereas high mRNA levels of SMAD3 and TLR2 with poor OS. In conclusion, the present study identified a set of proteins that may play a significant role in predicting prognosis of NSCLC patients with clinical stages I-II.
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Affiliation(s)
- Justyna Durślewicz
- Department of Clinical Pathomorphology, Faculty of Medicine, Collegium Medicum in Bydgoszcz, 49577Nicolaus Copernicus University, Toruń, Poland
| | - Anna Klimaszewska-Wiśniewska
- Department of Clinical Pathomorphology, Faculty of Medicine, Collegium Medicum in Bydgoszcz, 49577Nicolaus Copernicus University, Toruń, Poland
| | - Jakub Jóźwicki
- Department of Clinical Pathomorphology, Faculty of Medicine, Collegium Medicum in Bydgoszcz, 49577Nicolaus Copernicus University, Toruń, Poland
| | - Paulina Antosik
- Department of Clinical Pathomorphology, Faculty of Medicine, Collegium Medicum in Bydgoszcz, 49577Nicolaus Copernicus University, Toruń, Poland
| | - Marta Smolińska-Świtała
- Department of Clinical Pathomorphology, Faculty of Medicine, Collegium Medicum in Bydgoszcz, 49577Nicolaus Copernicus University, Toruń, Poland
| | - Maciej Gagat
- Department of Histology and Embryology, Faculty of Medicine, Collegium Medicum in Bydgoszcz, 49577Nicolaus Copernicus University, Toruń, Poland
| | - Adam Kowalewski
- Department of Clinical Pathomorphology, Faculty of Medicine, Collegium Medicum in Bydgoszcz, 49577Nicolaus Copernicus University, Toruń, Poland.,Department of Tumor Pathology and Pathomorphology, Oncology Centre, Prof Franciszek Łukaszczyk Memorial Hospital, Bydgoszcz, Poland
| | - Dariusz Grzanka
- Department of Clinical Pathomorphology, Faculty of Medicine, Collegium Medicum in Bydgoszcz, 49577Nicolaus Copernicus University, Toruń, Poland
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Shehata MM, Sallam AAM, Naguib MG, El-Mesallamy HO. Overexpression of BAMBI and SMAD7 impacts prognosis of acute myeloid leukemia patients: A potential TERT non-canonical role. Cancer Biomark 2021; 31:47-58. [PMID: 33780363 DOI: 10.3233/cbm-200927] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
BACKGROUND Bone morphogenetic protein and activin membrane-bound inhibitor (BAMBI) and mothers against decapentaplegic homolog 7 (SMAD7) are important transforming growth factor-β (TGF-β) signaling antagonists, however their roles in acute myeloid leukemia (AML) remains unclear. Telomerase reverse transcriptase (TERT) may be involved in regulating BAMBI and SMAD7 expressions; a role beyond telomeres that is not clinically validated yet. OBJECTIVE In this study, we examined the expression levels and prognostic values of BAMBI, SMAD7 and TERT and their association with AML patients' outcomes. METHODS Blood samples were collected from 74 de-novo AML patients and 16 controls. Real-time quantitative PCR (qRT-PCR) was performed to analyze BAMBI, SMAD7 and TERT expressions. RESULTS BAMBI and SMAD7 expression in AML were significantly upregulated versus controls (p< 0.05). BAMBI, SMAD7 and TERT levels were significantly correlated together (p< 0.001). Kaplan-Meier analysis indicated that patients with high BAMBI, SMAD7 and TERT expression levels had markedly shorter event free survival (EFS) and overall survival (OS) time (p< 0.01). Furthermore, multivariate analysis revealed that only high BAMBI expression was an independent risk factor for OS (p= 0.001). CONCLUSIONS BAMBI is a novel biomarker in predicting prognosis in AML patients. Moreover, a potential interplay is found between BAMBI, SMAD7 and TERT in AML pathogenies.
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Affiliation(s)
- Miral Magdy Shehata
- Biochemistry Department, Faculty of Pharmacy, Ain Shams University (ASU), Abassia, Cairo, Egypt
| | - Al-Aliaa Mohamed Sallam
- Biochemistry Department, Faculty of Pharmacy, Ain Shams University (ASU), Abassia, Cairo, Egypt.,Biochemistry Department, School of Pharmacy and Pharmaceutical Industries, Badr University in Cairo (BUC), Badr City, Cairo, Egypt
| | - Mary Gamal Naguib
- Hematology Department, Faculty of Medicine, Ain Shams University (ASU), Cairo, Egypt
| | - Hala Osman El-Mesallamy
- Biochemistry Department, Faculty of Pharmacy, Ain Shams University (ASU), Abassia, Cairo, Egypt.,Biochemistry Department, Dean of Faculty of Pharmacy, Sinai University (SU), Sinai, Egypt
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Rajagopal P, Jayandharan GR, Krishnan UM. Evaluation of the Anticancer Activity of pH-Sensitive Polyketal Nanoparticles for Acute Myeloid Leukemia. Mol Pharm 2021; 18:2015-2031. [PMID: 33780253 DOI: 10.1021/acs.molpharmaceut.0c01243] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Polyketals are a class of acid-responsive polymers that have been relatively less explored for drug delivery applications compared to polyesters. The degradation of these polymers is accelerated in an acidic medium and does not result in acidic byproducts. Their biocompatibility depends on the diol used for the synthesis. The present work aims to synthesize, characterize, and fabricate nanospheres of an aliphatic polyketal for delivery of the nucleotide analogue cytarabine toward the treatment of acute myeloid leukemia (AML). The internalization mechanism of the nanospheres was probed, and its implication on the nuclear localization and escape from the endo-lysosomal compartments were studied. The drug-loaded polyketal nanoparticles reduced the cell viability to a greater extent compared with the free drug. The effect of the drug-loaded polyketal nanoparticles on the differential gene expression of leukemic cells was investigated for the first time to understand their therapeutic implications. It was found that treatment with drug-loaded polyketal nanoparticles downregulated AML-specific genes involved in cell proliferation and recurrence compared to the free drug. The protein expression studies were performed for selected genes obtained from gene expression analysis. Biodistribution studies showed that the poly(cyclohexane-1,4-diyl acetone dimethylene ketal) (PCADK) nanoparticles exhibit prolonged circulation time. Overall, our results suggest that polyketal-based delivery of cytarabine represents a more effective alternative strategy for AML therapy.
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Affiliation(s)
- Pratheppa Rajagopal
- Centre for Nanotechnology & Advanced Biomaterials, SASTRA Deemed University Thanjavur 613401, India.,School of Chemical and Biotechnology, SASTRA Deemed University, Thanjavur 613401, India
| | - Giridhara R Jayandharan
- Department of Biological Sciences and Bioengineering, Indian Institute of Technology, Kanpur 208016, Uttar Pradesh, India.,The Mehta Family Centre for Engineering In Medicine, Indian Institute of Technology, Kanpur 208016, Uttar Pradesh, India
| | - Uma Maheswari Krishnan
- Centre for Nanotechnology & Advanced Biomaterials, SASTRA Deemed University Thanjavur 613401, India.,School of Chemical and Biotechnology, SASTRA Deemed University, Thanjavur 613401, India.,School of Arts, Science & Humanities, SASTRA Deemed University, Thanjavur 613401, India
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Dai ZT, Wang J, Zhao K, Xiang Y, Li JP, Zhang HM, Peng ZT, Liao XH. Integrated TCGA and GEO analysis showed that SMAD7 is an independent prognostic factor for lung adenocarcinoma. Medicine (Baltimore) 2020; 99:e22861. [PMID: 33126329 PMCID: PMC7598801 DOI: 10.1097/md.0000000000022861] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
The lack of effective markers leads to missed optimal treatment times, resulting in poorer prognosis in most cancers. Drosophila mothers against decapentaplegic protein (SMAD) family members are important cytokines in the transforming growth factor-beta family. They jointly regulate the processes of cell growth, differentiation, and apoptosis. However, the expression of SMAD family genes in pan-cancers and their impact on prognosis have not been elucidated. Perl software and R software were used to perform expression analysis and survival curve analysis on the data collected by TCGA, GTEx, and GEO, and the potential regulatory pathways were determined through gene ontology enrichment and kyoto encyclopedia of genes and genomes enrichment analysis. It was found that SMAD7 and SMAD9 expression decreased in lung adenocarcinoma (LUAD), and their expression was positively correlated with survival time. Additionally, SMAD7 could be used as an independent prognostic factor for LUAD. In general, SMAD7 and SMAD9 can be used as prognostic markers of LUAD. Further, SMAD7 is expected to become a therapeutic target for LUAD.
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Affiliation(s)
- Zhou-Tong Dai
- Institute of Biology and Medicine, College of Life and Health Sciences, Wuhan University of Science and Technology, Wuhan
| | - Jun Wang
- Institute of Biology and Medicine, College of Life and Health Sciences, Wuhan University of Science and Technology, Wuhan
| | - Kai Zhao
- Huangshi Central Hospital, Huangshi
| | | | - Jia Peng Li
- Institute of Biology and Medicine, College of Life and Health Sciences, Wuhan University of Science and Technology, Wuhan
| | - Hui-Min Zhang
- Institute of Biology and Medicine, College of Life and Health Sciences, Wuhan University of Science and Technology, Wuhan
| | - Zi-Tan Peng
- Institute of Biology and Medicine, College of Life and Health Sciences, Wuhan University of Science and Technology, Wuhan
- Hebei Kingsci Pharmaceutical Technology Co., Ltd, Shijiazhuang, Hebei, P.R. China
| | - Xing Hua Liao
- Institute of Biology and Medicine, College of Life and Health Sciences, Wuhan University of Science and Technology, Wuhan
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Zeng Z, Yang Y, Qing C, Hu Z, Huang Y, Zhou C, Li D, Jiang Y. Distinct expression and prognostic value of members of SMAD family in non-small cell lung cancer. Medicine (Baltimore) 2020; 99:e19451. [PMID: 32150102 PMCID: PMC7220383 DOI: 10.1097/md.0000000000019451] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Non-small cell lung cancer (NSCLC) is the major cause of cancer mortality worldwide. Though multidisciplinary therapies have been widely used for NSCLC, its overall prognosis remains very poor, presumably owing to lack of effective prognostic biomarkers. SMAD, a well-known transcription factor, plays an essential role in carcinogenesis. Aberrant expression of SMAD have been found in various cancers, and may be regarded as prognostic indicator for some malignancies. However, the expression and prognostic role of SMAD family member, especially at the mRNA level, remain elusive in NSCLC. In the present study, we report the distinct expression and prognostic value of individual SMAD in patients with NSCLC by analyzing several online databases including ONCOMINE, Gene Expression Profiling Interactive Analysis, Human Protein Atlas database, Kaplan-Meier plotter, cBioPortal, and Database for Annotation, Visualization and Integrated Discovery. The mRNA levels of SMAD6/7/9 in NSCLC were significantly down-regulated in NSCLC, and aberrant SMAD2/3/4/5/6/7/9 mRNA levels were all correlated with the prognosis of NSCLC. Collectively, SMAD2/3/4/5/6/7/9 may server as prognostic biomarkers and potential targets for NSCLC, and thus facilitate the customized treatment strategies for NSCLC patients.
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Affiliation(s)
- Zhenguo Zeng
- Department of Critical Care Medicine, The First Affiliated Hospital of Nanchang University
| | - Yuting Yang
- Department of Critical Care Medicine, The First Affiliated Hospital of Nanchang University
| | - Cheng Qing
- Department of Critical Care Medicine, The First Affiliated Hospital of Nanchang University
| | - Zhiguo Hu
- Department of Critical Care Medicine, The First Affiliated Hospital of Nanchang University
- Department of Critical Care Medicine, Inner Mongolia People's Hospital, Hohhot, Inner Mongolia
| | - Yiming Huang
- Department of Critical Care Medicine, The First Affiliated Hospital of Nanchang University
| | - Chaoqi Zhou
- Department of Critical Care Medicine, The First Affiliated Hospital of Nanchang University
| | - Dan Li
- Department of Respiratory and Critical Care Medicine
| | - Yanxia Jiang
- Department of Endocrinology and Metabolism, The First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi Province, China
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Niu H, Huang Y, Yan L, Zhang L, Zhao M, Lu T, Yang X, Chen Z, Zhan C, Shi Y, Wang Q. Knockdown of SMAD3 inhibits the growth and enhances the radiosensitivity of lung adenocarcinoma via p21 in vitro and in vivo. Int J Biol Sci 2020; 16:1010-1022. [PMID: 32140069 PMCID: PMC7053338 DOI: 10.7150/ijbs.40173] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2019] [Accepted: 12/26/2019] [Indexed: 01/09/2023] Open
Abstract
Radiotherapy is an effective approach for the treatment of lung adenocarcinoma. However, evidence suggests that lung adenocarcinoma can easily develop tolerance to radiotherapy. The purpose of this study was to investigate the effect and mechanism of SMAD3 on the radiosensitivity of lung adenocarcinoma in vitro and in vivo. We found that knockdown of SMAD3 using two short hairpin RNAs in lentivirus vectors significantly inhibited cell growth and increased radiosensitivity of the lung adenocarcinoma cell lines A549, H1299, and H1975. Using RNA sequencing and bioinformatics analyses, we found that the significantly differentially expressed genes in SMAD3 knockdown cells were mainly enriched in the cell cycle process. We then showed that knockdown of SMAD3 significantly reduced expression of cyclin-dependent kinase inhibitor 1 (p21) and increased the proportion of G2/M phase cells and the radiosensitivity of lung adenocarcinoma. Chromatin immunoprecipitation results in the Gene Expression Omnibus (GEO) database and our luciferase assay verified that SMAD3 directly bound the p21 promoter. A series of rescue experiments showed that overexpression of p21 partly reversed the effect of SMAD3 on proliferation and radioresistance in vitro and in vivo. Moreover, we found that the expression levels of SMAD3 and p21 were highly correlated, and both correlated with the patients' survival in online databases and clinical specimens. Expression of SMAD3 and p21 was also significantly different between radioresistant and radiosensitive patients in our hospital. Our results indicate that SMAD3 is a potential prognosis and radiosensitivity indicator as well as a target for radiotherapy and other treatments of patients with lung adenocarcinoma.
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Affiliation(s)
- Hao Niu
- Department of Radiation Oncology, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Yiwei Huang
- Department of Thoracic Surgery, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Li Yan
- Department of Radiation Oncology, Eye & ENT Hospital, Fudan University, Shanghai, China
| | - Li Zhang
- Department of Radiation Oncology, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Mengnan Zhao
- Department of Thoracic Surgery, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Tao Lu
- Department of Thoracic Surgery, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Xiaodong Yang
- Department of Thoracic Surgery, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Zhengcong Chen
- Department of Thoracic Surgery, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Cheng Zhan
- Department of Thoracic Surgery, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Yu Shi
- Department of Thoracic Surgery, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Qun Wang
- Department of Thoracic Surgery, Zhongshan Hospital, Fudan University, Shanghai, China
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