1
|
Zhang X, Yu T, Gao G, Xu J, Lin R, Pan Z, Liu J, Feng W. Cell division cycle 42 effector protein 4 inhibits prostate cancer progression by suppressing ERK signaling pathway. BIOMOLECULES & BIOMEDICINE 2023; 24:840-847. [PMID: 38153517 PMCID: PMC11293231 DOI: 10.17305/bb.2023.9986] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/30/2023] [Revised: 12/09/2023] [Accepted: 12/27/2023] [Indexed: 12/29/2023]
Abstract
Prostate cancer (PCa) is the most common malignancy among men worldwide. The cell division cycle 42 effector protein 4 (CDC42EP4) functions downstream of CDC42, yet its role and molecular mechanisms in PCa remain unexplored. This study aimed to elucidate the role of CDC42EP4 in the progression of PCa and its underlying mechanisms. Bioinformatical analysis indicated that CDC42EP4 expression was significantly lower in PCa tissue compared to normal prostate tissue. Cellular phenotyping analysis suggested that CDC42EP4 markedly inhibited the proliferation, migration, and invasion of PCa cells. Xenograft tumor assays further demonstrated that CDC42EP4 suppressed the growth of PCa cells in vivo. Mechanistically, the study established that CDC42EP4 inhibited the ERK pathway in PCa cells. Additionally, the ERK pathway inhibitor PD0325901 was employed, revealing that PD0325901 significantly nullified the effects of CDC42EP4 on PCa cell proliferation, migration, and invasion. Collectively, our findings demonstrate that CDC42EP4 acts as a critical tumor suppressor gene, inhibiting PCa cell proliferation, migration, and invasion through the ERK pathway, thereby presenting potential targets for PCa therapy.
Collapse
Affiliation(s)
- Xiaowen Zhang
- School of Life Science and Technology, Weifang Medical University, Weifang, China
| | - Tao Yu
- School of Life Science and Technology, Weifang Medical University, Weifang, China
| | - Guojun Gao
- Department of Urology Surgery, Affiliated Hospital of Weifang Medical University, Weifang, China
| | - Junbao Xu
- Cancer Center, Shandong Public Health Clinical Center, Shandong, China
| | - Ruihui Lin
- School of Life Science and Technology, Weifang Medical University, Weifang, China
| | - Zhifang Pan
- School of Life Science and Technology, Weifang Medical University, Weifang, China
| | - Jianying Liu
- Department of Nuclear Medicine, The Third Affiliated Hospital of Shandong First Medical University, Jinan, China
| | - Weiguo Feng
- School of Life Science and Technology, Weifang Medical University, Weifang, China
| |
Collapse
|
2
|
Ye C, Chong W, Liu Y, Zhu X, Ren H, Xu K, Xie X, Du F, Zhang Z, Wang M, Ma T, Shang L, Li L, Chen H. Suppression of tumorigenesis in LUAD by LRP1B through regulation of the IL-6-JAK-STAT3 pathway. Am J Cancer Res 2023; 13:2886-2905. [PMID: 37560001 PMCID: PMC10408488] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2022] [Accepted: 06/20/2023] [Indexed: 08/11/2023] Open
Abstract
Lung adenocarcinoma (LUAD) is the most common type of lung cancer. LRP1B was initially identified as a cancer suppressor in several cancers. However, the potential biological phenotypes and molecular mechanisms of LRP1B in LUAD have not been fully investigated. In our study, we showed that the expression of LRP1B in LUAD tissues was lower than that in normal tissues. Knockdown of LRP1B markedly enhanced malignancy of LUAD cells. Genomic analysis indicated that the population expressing low-levels of LRP1B had higher genomic instability, which accounted for a larger proportion of aneuploidy and inflammation subtyping. Enrichment analysis of bulk and cell-line transcriptomic data both showed that the low expression of LRP1B could induce the activation of IL-6-JAK-STAT3, chemokine, cytokine, and other inflammation signaling pathways. Moreover, our findings revealed that knockdown LRP1B enhanced the secretion of IL-6 and IL-8, as confirmed by ELISA assays. Further validation using PCR and WB confirmed that downregulation of LRP1B mRNA significantly upregulated the activity of the IL-6-JAK-STAT3 pathway. Collectively, this study highlights LRP1B as a tumor suppressor gene and reveals that LRP1B knockdown promotes malignant progression in LUAD by inducing inflammation through the IL-6-JAK-STAT3 pathway.
Collapse
Affiliation(s)
- Chunshui Ye
- Department of Gastrointestinal Surgery, Shandong Provincial Hospital, Shandong UniversityJinan, Shandong, China
| | - Wei Chong
- Department of Gastrointestinal Surgery, Shandong Provincial Hospital, Shandong UniversityJinan, Shandong, China
- Key Laboratory of Engineering of Shandong Province, Shandong Provincial Hospital Affiliated to Shandong First Medical UniversityJinan, Shandong, China
- Medical Science and Technology Innovation Center, Shandong First Medical University & Shandong Academy of Medical SciencesJinan, Shandong, China
| | - Yuan Liu
- Department of Gastrointestinal Surgery, Shandong Provincial Hospital, Shandong UniversityJinan, Shandong, China
| | - Xingyu Zhu
- Department of Gastrointestinal Surgery, Shandong Provincial Hospital, Shandong UniversityJinan, Shandong, China
- Key Laboratory of Engineering of Shandong Province, Shandong Provincial Hospital Affiliated to Shandong First Medical UniversityJinan, Shandong, China
- Medical Science and Technology Innovation Center, Shandong First Medical University & Shandong Academy of Medical SciencesJinan, Shandong, China
| | - Huicheng Ren
- Department of Gastrointestinal Surgery, Shandong Provincial Hospital, Shandong UniversityJinan, Shandong, China
- Key Laboratory of Engineering of Shandong Province, Shandong Provincial Hospital Affiliated to Shandong First Medical UniversityJinan, Shandong, China
- Medical Science and Technology Innovation Center, Shandong First Medical University & Shandong Academy of Medical SciencesJinan, Shandong, China
| | - Kang Xu
- Department of Gastrointestinal Surgery, Shandong Provincial Hospital, Shandong UniversityJinan, Shandong, China
- Key Laboratory of Engineering of Shandong Province, Shandong Provincial Hospital Affiliated to Shandong First Medical UniversityJinan, Shandong, China
- Medical Science and Technology Innovation Center, Shandong First Medical University & Shandong Academy of Medical SciencesJinan, Shandong, China
| | - Xiaozhou Xie
- Department of Gastrointestinal Surgery, Shandong Provincial Hospital, Shandong UniversityJinan, Shandong, China
- Key Laboratory of Engineering of Shandong Province, Shandong Provincial Hospital Affiliated to Shandong First Medical UniversityJinan, Shandong, China
- Medical Science and Technology Innovation Center, Shandong First Medical University & Shandong Academy of Medical SciencesJinan, Shandong, China
| | - Fengying Du
- Department of Gastrointestinal Surgery, Shandong Provincial Hospital, Shandong UniversityJinan, Shandong, China
- Key Laboratory of Engineering of Shandong Province, Shandong Provincial Hospital Affiliated to Shandong First Medical UniversityJinan, Shandong, China
- Medical Science and Technology Innovation Center, Shandong First Medical University & Shandong Academy of Medical SciencesJinan, Shandong, China
| | - Zihao Zhang
- Department of Gastrointestinal Surgery, Shandong Provincial Hospital, Shandong UniversityJinan, Shandong, China
| | - Mingfei Wang
- Department of Gastrointestinal Surgery, Shandong Provincial Hospital, Shandong UniversityJinan, Shandong, China
| | - Tianrong Ma
- Department of Gastrointestinal Surgery, Shandong Provincial Hospital, Shandong UniversityJinan, Shandong, China
- Key Laboratory of Engineering of Shandong Province, Shandong Provincial Hospital Affiliated to Shandong First Medical UniversityJinan, Shandong, China
- Medical Science and Technology Innovation Center, Shandong First Medical University & Shandong Academy of Medical SciencesJinan, Shandong, China
| | - Liang Shang
- Department of Gastrointestinal Surgery, Shandong Provincial Hospital, Shandong UniversityJinan, Shandong, China
- Key Laboratory of Engineering of Shandong Province, Shandong Provincial Hospital Affiliated to Shandong First Medical UniversityJinan, Shandong, China
- Medical Science and Technology Innovation Center, Shandong First Medical University & Shandong Academy of Medical SciencesJinan, Shandong, China
| | - Leping Li
- Department of Gastrointestinal Surgery, Shandong Provincial Hospital, Shandong UniversityJinan, Shandong, China
- Key Laboratory of Engineering of Shandong Province, Shandong Provincial Hospital Affiliated to Shandong First Medical UniversityJinan, Shandong, China
- Medical Science and Technology Innovation Center, Shandong First Medical University & Shandong Academy of Medical SciencesJinan, Shandong, China
| | - Hao Chen
- Clinical Research Center of Shandong University, Clinical Epidemiology Unit, Qilu Hospital of Shandong UniversityJinan, Shandong, China
| |
Collapse
|
3
|
MicroRNA and Messenger RNA Expression Profiles in Canine Mammary Gland Tumor. Int J Mol Sci 2023; 24:ijms24032618. [PMID: 36768939 PMCID: PMC9917093 DOI: 10.3390/ijms24032618] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2022] [Revised: 01/16/2023] [Accepted: 01/27/2023] [Indexed: 02/03/2023] Open
Abstract
Canine mammary gland tumor (CMT) is the most frequently diagnosed neoplasm in intact female dogs. As prognosis depends on the malignancy of tumors and metastasis levels, early and accurate diagnosis are crucial for prolongation of life expectancy. The genetic similarity of dogs with humans in addition to environmental and physiological similarities make them ideal models for the study of cancer. In this study, we analyzed differentially expressed microRNAs followed by RNA-Seq to investigate the alterations in mRNA levels based on the malignancy (benign, malignant) and the biopsy locations (tumors, surrounding normal tissues). We identified multiple breast cancer-related genes regardless of malignancy. We found cfa-miR-503 to be the only miRNA that showed altered expression in response to malignancy in CMTs. Although further validation is needed, cfa-miR-503 could be used as a potential diagnostic biomarker as well as a potential RNA-based anti-tumor drug in malignant CMTs.
Collapse
|
4
|
Liu Z, Cai C, Ma X, Liu J, Chen L, Lui VWY, Cooper GF, Lu X. A Novel Bayesian Framework Infers Driver Activation States and Reveals Pathway-Oriented Molecular Subtypes in Head and Neck Cancer. Cancers (Basel) 2022; 14:cancers14194825. [PMID: 36230748 PMCID: PMC9563147 DOI: 10.3390/cancers14194825] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2022] [Revised: 09/28/2022] [Accepted: 09/30/2022] [Indexed: 02/08/2023] Open
Abstract
Head and neck squamous cell cancer (HNSCC) is an aggressive cancer resulting from heterogeneous causes. To reveal the underlying drivers and signaling mechanisms of different HNSCC tumors, we developed a novel Bayesian framework to identify drivers of individual tumors and infer the states of driver proteins in cellular signaling system in HNSCC tumors. First, we systematically identify causal relationships between somatic genome alterations (SGAs) and differentially expressed genes (DEGs) for each TCGA HNSCC tumor using the tumor-specific causal inference (TCI) model. Then, we generalize the most statistically significant driver SGAs and their regulated DEGs in TCGA HNSCC cohort. Finally, we develop machine learning models that combine genomic and transcriptomic data to infer the protein functional activation states of driver SGAs in tumors, which enable us to represent a tumor in the space of cellular signaling systems. We discovered four mechanism-oriented subtypes of HNSCC, which show distinguished patterns of activation state of HNSCC driver proteins, and importantly, this subtyping is orthogonal to previously reported transcriptomic-based molecular subtyping of HNSCC. Further, our analysis revealed driver proteins that are likely involved in oncogenic processes induced by HPV infection, even though they are not perturbed by genomic alterations in HPV+ tumors.
Collapse
Affiliation(s)
- Zhengping Liu
- Department of Biomedical Informatics, School of Medicine, University of Pittsburgh, Pittsburgh 15206, PA, USA
- School of Medicine, Tsinghua University, Beijing 100190, China
| | - Chunhui Cai
- Department of Biomedical Informatics, School of Medicine, University of Pittsburgh, Pittsburgh 15206, PA, USA
- Correspondence:
| | - Xiaojun Ma
- Department of Biomedical Informatics, School of Medicine, University of Pittsburgh, Pittsburgh 15206, PA, USA
| | - Jinling Liu
- Department of Engineering Management and Systems Engineering, Missouri University of Science and Technology, Rolla, MO 65409, USA
- Department of Biological Sciences, Missouri University of Science and Technology, Rolla, MO 65409, USA
| | - Lujia Chen
- Department of Biomedical Informatics, School of Medicine, University of Pittsburgh, Pittsburgh 15206, PA, USA
| | - Vivian Wai Yan Lui
- Georgia Cancer Center, and Department of Medicine, Medical College of Georgia, Augusta University, Augusta, GA 30912, USA
| | - Gregory F. Cooper
- Department of Biomedical Informatics, School of Medicine, University of Pittsburgh, Pittsburgh 15206, PA, USA
- UPMC Hillman Cancer Center, University of Pittsburgh Medical Center, Pittsburgh, PA 15232, USA
| | - Xinghua Lu
- Department of Biomedical Informatics, School of Medicine, University of Pittsburgh, Pittsburgh 15206, PA, USA
- UPMC Hillman Cancer Center, University of Pittsburgh Medical Center, Pittsburgh, PA 15232, USA
| |
Collapse
|
5
|
Chen L, Huang Y, Duan Z, Huang P, Yao H, Zhou Y, Ji Q, Liu X. Exosomal miR-500 Derived From Lipopolysaccharide-Treated Macrophage Accelerates Liver Fibrosis by Suppressing MFN2. Front Cell Dev Biol 2021; 9:716209. [PMID: 34676206 PMCID: PMC8525629 DOI: 10.3389/fcell.2021.716209] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2021] [Accepted: 09/10/2021] [Indexed: 01/03/2023] Open
Abstract
Liver fibrosis is an outcome of chronic hepatic injury, which can eventually result in cirrhosis, liver failure, and even liver cancer. The activation of hepatic stellate cell (HSC) is a prominent driver of liver fibrosis. Recently, it has been found that the crosstalk between HSCs and immune cells, including hepatic macrophages, plays an important role in the initiation and development of liver fibrosis. As a vital vehicle of intercellular communication, exosomes transfer specific cargos into HSCs from macrophages. Here, we show that exosomes derived from lipopolysaccharide (LPS)-treated macrophages has higher expression level of miR-500. And overexpression or inhibition of miR-500 in macrophage exosomes could promote or suppress HSC proliferation and activation. Treatment of exosomes with miR-500 overexpression can accelerate liver fibrosis in CCl4-induced liver fibrosis mouse model. miR-500 promotes HSC activation and liver fibrosis via suppressing MFN2. Moreover, miR-500 in serum exosomes could be a biomarker for liver fibrosis. Taken together, exosomal miR-500 derived from LPS-activated macrophages promotes HSC proliferation and activation by targeting MFN2 in liver fibrosis.
Collapse
Affiliation(s)
- Lisha Chen
- Central Laboratory, Department of Neurosurgery, The Second Xiangya Hospital, Central South University, Changsha, China
| | - Yan Huang
- Affiliated Changsha Hospital of Hunan Normal University, The Fourth Hospital of Changsha, Institute of Emergency and Critical Care Medicine of Changsha, Changsha, China
| | - Zhixi Duan
- Department of Emergency Medicine, Trauma Center, The Second Xiangya Hospital, Central South University, Changsha, China
| | - Peiqi Huang
- Affiliated Changsha Hospital of Hunan Normal University, The Fourth Hospital of Changsha, Institute of Emergency and Critical Care Medicine of Changsha, Changsha, China
| | - Hongbing Yao
- Department of Hepatobiliary and Pancreatic Surgery, The Second Affiliated Hospital, Guilin Medical University, Guilin, China
| | - Yu Zhou
- Department of Emergency Medicine, Trauma Center, The Second Xiangya Hospital, Central South University, Changsha, China
| | - Qin Ji
- Department of Emergency Medicine, Trauma Center, The Second Xiangya Hospital, Central South University, Changsha, China
| | - Xiangfeng Liu
- Department of Emergency Medicine, Trauma Center, The Second Xiangya Hospital, Central South University, Changsha, China
| |
Collapse
|
6
|
Príncipe C, Dionísio de Sousa IJ, Prazeres H, Soares P, Lima RT. LRP1B: A Giant Lost in Cancer Translation. Pharmaceuticals (Basel) 2021; 14:836. [PMID: 34577535 PMCID: PMC8469001 DOI: 10.3390/ph14090836] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2021] [Revised: 08/14/2021] [Accepted: 08/16/2021] [Indexed: 12/23/2022] Open
Abstract
Low-density lipoprotein receptor-related protein 1B (LRP1B) is a giant member of the LDLR protein family, which includes several structurally homologous cell surface receptors with a wide range of biological functions from cargo transport to cell signaling. LRP1B is among the most altered genes in human cancer overall. Found frequently inactivated by several genetic and epigenetic mechanisms, it has mostly been regarded as a putative tumor suppressor. Still, limitations in LRP1B studies exist, in particular associated with its huge size. Therefore, LRP1B expression and function in cancer remains to be fully unveiled. This review addresses the current understanding of LRP1B and the studies that shed a light on the LRP1B structure and ligands. It goes further in presenting increasing knowledge brought by technical and methodological advances that allow to better manipulate LRP1B expression in cells and to more thoroughly explore its expression and mutation status. New evidence is pushing towards the increased relevance of LRP1B in cancer as a potential target or translational prognosis and response to therapy biomarker.
Collapse
Affiliation(s)
- Catarina Príncipe
- i3S—Instituto de Investigação e Inovação em Saúde, Universidade do Porto, 4200-135 Porto, Portugal; (C.P.); (H.P.); (P.S.)
- Cancer Signalling and Metabolism Group, IPATIMUP—Institute of Molecular Pathology and Immunology, University of Porto, 4200-135 Porto, Portugal
| | - Isabel J. Dionísio de Sousa
- Department of Oncology, Centro Hospitalar Universitário de São João, 4200-450 Porto, Portugal;
- Faculty of Medicine, University of Porto, 4200-319 Porto, Portugal
| | - Hugo Prazeres
- i3S—Instituto de Investigação e Inovação em Saúde, Universidade do Porto, 4200-135 Porto, Portugal; (C.P.); (H.P.); (P.S.)
- IPO-Coimbra, Portuguese Oncology Institute of Coimbra, 3000-075 Coimbra, Portugal
| | - Paula Soares
- i3S—Instituto de Investigação e Inovação em Saúde, Universidade do Porto, 4200-135 Porto, Portugal; (C.P.); (H.P.); (P.S.)
- Cancer Signalling and Metabolism Group, IPATIMUP—Institute of Molecular Pathology and Immunology, University of Porto, 4200-135 Porto, Portugal
- Faculty of Medicine, University of Porto, 4200-319 Porto, Portugal
- Department of Pathology, Faculty of Medicine, University of Porto, 4200-319 Porto, Portugal
| | - Raquel T. Lima
- i3S—Instituto de Investigação e Inovação em Saúde, Universidade do Porto, 4200-135 Porto, Portugal; (C.P.); (H.P.); (P.S.)
- Cancer Signalling and Metabolism Group, IPATIMUP—Institute of Molecular Pathology and Immunology, University of Porto, 4200-135 Porto, Portugal
- Faculty of Medicine, University of Porto, 4200-319 Porto, Portugal
- Department of Pathology, Faculty of Medicine, University of Porto, 4200-319 Porto, Portugal
| |
Collapse
|
7
|
Liu F, Hou W, Liang J, Zhu L, Luo C. LRP1B mutation: a novel independent prognostic factor and a predictive tumor mutation burden in hepatocellular carcinoma. J Cancer 2021; 12:4039-4048. [PMID: 34093808 PMCID: PMC8176260 DOI: 10.7150/jca.53124] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2020] [Accepted: 04/23/2021] [Indexed: 12/24/2022] Open
Abstract
Hepatocellular carcinoma (HCC) is one of the most common malignancies globally and the second leading cause of cancer-related death. Low-density lipoprotein (LDL) receptor-related protein 1B (LRP1B) is one of the commonly mutated genes in HCC, but its role in HCC remains unclear. In this study, we analyzed the role of LRP1B mutation in HCC. The bioinformatics results show that LRP1B had a frequency of mutation in HCC patients, and LRP1B mutation was associated with a higher tumor mutation burden (TMB), and survival analysis proved that the prognosis of HCC patients with LRP1B mutation was poor. Univariate and multivariate COX regression analysis indicated that LRP1B mutation was an independent risk factor in evaluating HCC patients' prognosis. Correlation analysis showed that LRP1B mutation status was associated with the infiltration of 2 types of immune cells and higher expression of immune checkpoint gene human endogenous retrovirus-H long terminal repeat-associating protein 2 (HHLA2) in HCC patients. In summary, the results show that LRP1B mutation is associated with the higher TMB and poor prognosis of patients with HCC, and it was an independent risk factor for clinical outcomes of HCC patients. LRP1B gene mutations can serve as predictors in HCC patients with higher TMB and higher expression of HHLA2. The results of this study will be beneficial to future studies on targeted therapy and immunotherapy for HCC.
Collapse
Affiliation(s)
- Fahui Liu
- Department of Pathology, Affiliated Hospital of Youjiang Medical University for Nationalities, Baise 533000, Guangxi, PR China
| | - Wanyun Hou
- Department of Pathology, Affiliated Hospital of Youjiang Medical University for Nationalities, Baise 533000, Guangxi, PR China
| | - Jiadong Liang
- Department of Pathology, Affiliated Hospital of Youjiang Medical University for Nationalities, Baise 533000, Guangxi, PR China
| | - Lilan Zhu
- Youjiang Medical University for Nationalities, Baise 533000, Guangxi, PR China
| | - Chunying Luo
- Department of Pathology, Affiliated Hospital of Youjiang Medical University for Nationalities, Baise 533000, Guangxi, PR China.,Medical College of Guangxi University, Nanning, 530004, Guangxi, PR China
| |
Collapse
|
8
|
Palmini G, Romagnoli C, Donati S, Zonefrati R, Galli G, Marini F, Iantomasi T, Aldinucci A, Leoncini G, Franchi A, Beltrami G, Campanacci DA, Capanna R, Brandi ML. Analysis of a Preliminary microRNA Expression Signature in a Human Telangiectatic Osteogenic Sarcoma Cancer Cell Line. Int J Mol Sci 2021; 22:1163. [PMID: 33503899 PMCID: PMC7866083 DOI: 10.3390/ijms22031163] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Revised: 01/14/2021] [Accepted: 01/19/2021] [Indexed: 11/30/2022] Open
Abstract
Telangiectatic osteosarcoma (TOS) is an aggressive variant of osteosarcoma (OS) with distinctive radiographic, gross, microscopic features, and prognostic implications. Despite several studies on OS, we are still far from understanding the molecular mechanisms of TOS. In recent years, many studies have demonstrated not only that microRNAs (miRNAs) are involved in OS tumorigenesis, development, and metastasis, but also that the presence in high-grade types of OS of cancer stem cells (CSCs) plays an important role in tumor progression. Despite these findings, nothing has been described previously about the expression of miRNAs and the presence of CSCs in human TOS. Therefore, we have isolated/characterized a putative CSC cell line from human TOS (TOS-CSCs) and evaluated the expression levels of several miRNAs in TOS-CSCs using real-time quantitative assays. We show, for the first time, the existence of CSCs in human TOS, highlighting the in vitro establishment of this unique stabilized cell line and an identification of a preliminary expression of the miRNA profile, characteristic of TOS-CSCs. These findings represent an important step in the study of the biology of one of the most aggressive variants of OS and the role of miRNAs in TOS-CSC behavior.
Collapse
Affiliation(s)
- Gaia Palmini
- Department of Experimental and Clinical Biomedical Sciences, University of Florence, 50134 Florence, Italy
| | - Cecilia Romagnoli
- Department of Experimental and Clinical Biomedical Sciences, University of Florence, 50134 Florence, Italy
| | - Simone Donati
- Department of Experimental and Clinical Biomedical Sciences, University of Florence, 50134 Florence, Italy
| | - Roberto Zonefrati
- Department of Experimental and Clinical Biomedical Sciences, University of Florence, 50134 Florence, Italy
| | - Gianna Galli
- Department of Experimental and Clinical Biomedical Sciences, University of Florence, 50134 Florence, Italy
| | - Francesca Marini
- Department of Experimental and Clinical Biomedical Sciences, University of Florence, 50134 Florence, Italy
| | - Teresa Iantomasi
- Department of Experimental and Clinical Biomedical Sciences, University of Florence, 50134 Florence, Italy
| | - Alessandra Aldinucci
- Central Laboratory, Azienda Ospedaliero-Universitaria Careggi, 50134 Florence, Italy
| | - Gigliola Leoncini
- Department of Experimental and Clinical Biomedical Sciences, University of Florence, 50134 Florence, Italy
| | - Alessandro Franchi
- Department of Translational Research and of New Technologies in Medicine and Surgery, University of Pisa, 56126 Pisa, Italy
| | - Giovanni Beltrami
- Ortopedia Oncologica Pediatrica, AOU Careggi-AOU Meyer, 50139 Florence, Italy
| | | | - Rodolfo Capanna
- Department of Translational Research and of New Technologies in Medicine and Surgery, University of Pisa, 56126 Pisa, Italy
| | - Maria Luisa Brandi
- Department of Experimental and Clinical Biomedical Sciences, University of Florence, 50134 Florence, Italy
- Fondazione Italiana Ricerca sulle Malattie dell'Osso (FIRMO Onlus), 50141 Florence, Italy
| |
Collapse
|