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Pan J, Xue Y, Li S, Wang L, Mei J, Ni D, Jiang J, Zhang M, Yi S, Zhang R, Ma Y, Liu Y, Liu Y. PM 2.5 induces the distant metastasis of lung adenocarcinoma via promoting the stem cell properties of cancer cells. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2022; 296:118718. [PMID: 34942288 DOI: 10.1016/j.envpol.2021.118718] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/02/2021] [Revised: 12/17/2021] [Accepted: 12/18/2021] [Indexed: 06/14/2023]
Abstract
Lung cancer is the most common cancer in China and second worldwide, of which the incidence of lung adenocarcinoma is rising. As an independent factor, air pollution has drawn the attention of the public. An increasing body of studies has focused on the effect of PM2.5 on lung adenocarcinoma; however, the mechanism remains unclear. We collected the PM2.5 in two megacities, Beijing (BPM) and Shijiazhuang (SPM), located in the capital of China, and compared the different components and sources of PM2.5 in the two cities. Vehicle emissions are the primary sources of BPM, whereas SPM is industrial emissions. We found that chronic exposure to PM2.5 promotes the tumorigenesis and metastasis of lung adenocarcinoma in patient-derived xenograft (PDX) models, as well as the migration and invasion of lung adenocarcinoma cell lines. SPM has more severe effects in vivo and in vitro. The underlying mechanisms are related to the stem cell properties of cancer cells, the epithelial-mesenchymal transition (EMT) process, and the corresponding miRNAs. It is hopeful to provide a theoretical basis for improving air pollution in China, especially in the capital area, and is of the significance of long-term survival of lung cancer patients.
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Affiliation(s)
- Junyi Pan
- School of Medicine, Nankai University, Tianjin, 300071, PR China; Department of Thoracic Surgery, Chinese PLA General Hospital, Beijing, 100853, PR China
| | - Yueguang Xue
- School of Basic Medical Sciences, Zhengzhou University, Zhengzhou, Henan, 450001, PR China; CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety & CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology of China, Beijing, 100190, PR China
| | - Shilin Li
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety & CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology of China, Beijing, 100190, PR China
| | - Liuxiang Wang
- School of Basic Medical Sciences, Zhengzhou University, Zhengzhou, Henan, 450001, PR China; CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety & CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology of China, Beijing, 100190, PR China
| | - Jie Mei
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety & CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology of China, Beijing, 100190, PR China
| | - Dongqi Ni
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety & CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology of China, Beijing, 100190, PR China
| | - Jipeng Jiang
- Department of Thoracic Surgery, Chinese PLA General Hospital, Beijing, 100853, PR China
| | - Meng Zhang
- School of Medicine, Nankai University, Tianjin, 300071, PR China; Department of Thoracic Surgery, Chinese PLA General Hospital, Beijing, 100853, PR China
| | - Shaoqiong Yi
- Department of Thoracic Surgery, Chinese PLA General Hospital, Beijing, 100853, PR China
| | - Rong Zhang
- Hebei Medical University, Shijiazhuang, Hebei, 050017, PR China
| | - Yongfu Ma
- Department of Thoracic Surgery, Chinese PLA General Hospital, Beijing, 100853, PR China
| | - Yang Liu
- School of Medicine, Nankai University, Tianjin, 300071, PR China; Department of Thoracic Surgery, Chinese PLA General Hospital, Beijing, 100853, PR China
| | - Ying Liu
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety & CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology of China, Beijing, 100190, PR China; GBA National Institute for Nanotechnology Innovation, Guangzhou, Guangdong, 510700, PR China.
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Wang X, Song X, Bhandari RK. Distinct expression patterns of seven crucial microRNAs during early embryonic development in medaka (Oryzias latipes). Gene Expr Patterns 2020; 37:119133. [PMID: 32800847 DOI: 10.1016/j.gep.2020.119133] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2020] [Revised: 07/18/2020] [Accepted: 08/11/2020] [Indexed: 12/11/2022]
Abstract
MicroRNAs (i.e. miRNAs) are small non-coding RNAs that play essential modulation roles in embryonic development in vertebrates. Paternal and maternal miRNAs contribute to the development of post-fertilization embryo and zygotic genome activation. The pattern of expression and their roles in embryonic development of medaka are not clearly understood. The present study, therefore, examined a temporal expression of seven miRNAs, ola-let-7a, ola-miR-202-3p, ola-miR-126-3p, ola-miR-122, ola-miR-92a, ola-miR-125a-3p and ola-miR-430a in sperm, oocytes, and embryos during early developmental stages. Three unique expression patterns of miRNAs were observed. ola-let7a, ola-miR-202-3p and ola-miR-126-3p showed both paternal and maternal expression, and ola-miR-122, ola-miR-92a, ola-miR-125a-3p showed maternal expression only. The expression of six out of seven miRNAs significantly decreased after maternal-zygotic transition (MZT), whereas ola-miR-430a expression initiated only after MZT. The temporal dynamic expression of these miRNAs suggests their potential roles in early embryogenesis and genome-zygotic activation in medaka.
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Affiliation(s)
- Xuegeng Wang
- Department of Biology, University of North Carolina Greensboro, Greensboro, NC, 27412, USA
| | - Xiaohong Song
- Department of Biology, University of North Carolina Greensboro, Greensboro, NC, 27412, USA; College of Environmental Science and Engineering, Guilin University of Technology, Guilin, 541004, China
| | - Ramji K Bhandari
- Department of Biology, University of North Carolina Greensboro, Greensboro, NC, 27412, USA.
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Lan T, Chen YL, Gul Y, Zhao BW, Gao ZX. Comparative expression analysis of let-7 microRNAs during ovary development in Megalobrama amblycephala. FISH PHYSIOLOGY AND BIOCHEMISTRY 2019; 45:1101-1115. [PMID: 30835012 DOI: 10.1007/s10695-019-00624-7] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/18/2018] [Accepted: 02/21/2019] [Indexed: 06/09/2023]
Abstract
As a critical regulator of gene expression, let-7 family miRNAs have been reported to be involved in multiple physiological processes. In this study, in order to elucidate the putative regulatory effect of let-7 miRNAs during fish gonadal development and to identify which member is crucial for this regulation, the expression of ten members including let-7a/b/c/d/e/f/g/h/i/j were quantified in ovary, pituitary, and brain tissues during the different ovarian developmental stages of blunt snout bream Megalobrama amblycephala. According to the data from analysis of expression patterns, let-7a showed the highest expression value in almost all the tested ovaries, pituitaries, and brains, with let-7b and let-7d moderately expressed, following by other let-7 miRNAs. In terms of the differential expression levels of ten let-7 miRNAs at each developmental stage, the results showed that let-7a/b/d/f/h expression gradually increased during the ovary development from stage I to V and dropped significantly at the phase VI in ovary tissues. However, the expression of let-7a/b/e/f in pituitary increased during the ovary development from stage I to IV and declined at stage V. Among all the let-7 miRNAs, let-7a/b/d had the highest expression and their expression patterns were consistent with the gonad development of M. amblycephala. Furthermore, the mostly predicted target genes of let-7 miRNAs are significantly enriched in signaling pathways closely related to gonadal development through KEGG enrichment analysis. These results indicate that let-7 miRNA members, especially let-7a/b/d, may play important roles in the regulation of ovary development in M. amblycephala through negatively regulating expression of their target genes.
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Affiliation(s)
- Tian Lan
- College of Fisheries, Key Lab of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education, Key Lab of Freshwater Animal Breeding, Ministry of Agriculture, Huazhong Agricultural University, Wuhan, 430070, Hubei, China
- Collaborative Innovation Center for Healthy Freshwater Aquaculture of Hubei Province, Hubei Provincial Engineering Laboratory for Pond Aquaculture, Wuhan, 430070, China
| | - Yu-Long Chen
- College of Fisheries, Key Lab of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education, Key Lab of Freshwater Animal Breeding, Ministry of Agriculture, Huazhong Agricultural University, Wuhan, 430070, Hubei, China
- Collaborative Innovation Center for Healthy Freshwater Aquaculture of Hubei Province, Hubei Provincial Engineering Laboratory for Pond Aquaculture, Wuhan, 430070, China
| | - Yasmeen Gul
- Department of Zoology, Government College Women University, Faisalabad, 38860, Pakistan
| | - Bo-Wen Zhao
- College of Fisheries, Key Lab of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education, Key Lab of Freshwater Animal Breeding, Ministry of Agriculture, Huazhong Agricultural University, Wuhan, 430070, Hubei, China
- Collaborative Innovation Center for Healthy Freshwater Aquaculture of Hubei Province, Hubei Provincial Engineering Laboratory for Pond Aquaculture, Wuhan, 430070, China
| | - Ze-Xia Gao
- College of Fisheries, Key Lab of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education, Key Lab of Freshwater Animal Breeding, Ministry of Agriculture, Huazhong Agricultural University, Wuhan, 430070, Hubei, China.
- Collaborative Innovation Center for Healthy Freshwater Aquaculture of Hubei Province, Hubei Provincial Engineering Laboratory for Pond Aquaculture, Wuhan, 430070, China.
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Liu Y, Dong N, Miao J, Li C, Wang X, Ruan J. Lin28 promotes dental pulp cell proliferation via upregulation of cyclin-dependent proteins and interaction with let-7a/IGF2BP2 pathways. Biomed Pharmacother 2019; 113:108742. [PMID: 30851545 DOI: 10.1016/j.biopha.2019.108742] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2018] [Revised: 02/23/2019] [Accepted: 02/25/2019] [Indexed: 01/23/2023] Open
Abstract
Caries, pulpitis, and trauma are the main causes of dental pulp damage. The regeneration capacity of dental pulp declines with age. Lin28 is a conserved RNA-binding protein in higher eukaryotes that regulates several important cellular functions associated with development, glucose metabolism, differentiation, and pluripotency. Conditional reactivation of Lin28 gene in adult mice markedly accelerates the wound-healing process in injured digits. However, little is known about its functions and molecular mechanism in human dental pulp. The aim of this study was to investigate the effects and mechanism of overexpression of Lin28 gene on the proliferation of human dental pulp cells (HDPCs). For this purpose, a number of molecular and biochemical analytical techniques, including the ethynyl-2'-deoxyuridine (EdU) incorporation assay, RNA-protein immunoprecipitation (RIP) analysis, and luciferase assays, were used for detailed characterization. In addition, factors regulating HDPCs activation were explored through gain-of-function and loss-of-function analyses. The results demonstrate that Lin28 promotes cell proliferation and the S-G2/M transition of HDPCs and directly binds to a group of cell cycle regulatory mRNAs in HDPCs. Through bioinformatics analysis and luciferase assays, we confirmed that let-7a targets IGF2BP2. Silencing of IGF2BP2 showed similar cellular and molecular effects as let-7a. Similarly, restoration of IGF2BP2 counteracted the effects of let-7a expression. In conclusion, Lin28 promotes cell proliferation by regulation of both mRNA translation (let-7-independent) and miRNA biogenesis (let-7-dependent). Lin28 can promote the expression of pro-proliferative genes by directly enhancing their translation to maintain a tight control over HDPC proliferation.
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Affiliation(s)
- Yan Liu
- Clinical Research Center of Shaanxi Province for Dental and Maxillofacial Diseases, Department of Preventive Dentistry, College of Stomatology, Xi'an Jiaotong University, 98 Xiwu Road, Xi'an, Shaanxi, 710004, People's Republic of China
| | - Ning Dong
- Department of Pediatric Dentistry, College of Stomatology, Xi'an Jiaotong University, 98 Xiwu Road, Xi'an, Shaanxi, 710004, People's Republic of China
| | - Jiyu Miao
- Department of Cell Biology and Genetics, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi, 710061, People's Republic of China
| | - Chenxing Li
- Department of Pharmacology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi, 710061, People's Republic of China
| | - Xiaofei Wang
- Department of Cell Biology and Genetics, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi, 710061, People's Republic of China
| | - Jianping Ruan
- Clinical Research Center of Shaanxi Province for Dental and Maxillofacial Diseases, Department of Preventive Dentistry, College of Stomatology, Xi'an Jiaotong University, 98 Xiwu Road, Xi'an, Shaanxi, 710004, People's Republic of China.
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Abstract
MicroRNAs (miRNAs) are a class of small non-coding RNA molecules involved in the regulation of gene expression. They are involved in the fine-tuning of fundamental biological processes such as proliferation, differentiation, survival and apoptosis in many cell types. Emerging evidence suggests that miRNAs regulate critical pathways involved in stem cell function. Several miRNAs have been suggested to target transcripts that directly or indirectly coordinate the cell cycle progression of stem cells. Moreover, previous studies have shown that altered expression levels of miRNAs can contribute to pathological conditions, such as cancer, due to the loss of cell cycle regulation. However, the precise mechanism underlying miRNA-mediated regulation of cell cycle in stem cells is still incompletely understood. In this review, we discuss current knowledge of miRNAs regulatory role in cell cycle progression of stem cells. We describe how specific miRNAs may control cell cycle associated molecules and checkpoints in embryonic, somatic and cancer stem cells. We further outline how these miRNAs could be regulated to influence cell cycle progression in stem cells as a potential clinical application.
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Affiliation(s)
- Michelle M J Mens
- Department of Epidemiology, Erasmus University Medical Center, P.O. Box 2040, 3000 CA, Rotterdam, The Netherlands
| | - Mohsen Ghanbari
- Department of Epidemiology, Erasmus University Medical Center, P.O. Box 2040, 3000 CA, Rotterdam, The Netherlands. .,Department of Genetics, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran.
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