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Lodde V, Zarbo IR, Farina G, Masia A, Solla P, Campesi I, Delogu G, Muroni MR, Tsitsipatis D, Gorospe M, Floris M, Idda ML. Identification of hsa_circ_0018905 as a New Potential Biomarker for Multiple Sclerosis. Cells 2024; 13:1668. [PMID: 39404430 PMCID: PMC11475351 DOI: 10.3390/cells13191668] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2024] [Revised: 09/27/2024] [Accepted: 10/02/2024] [Indexed: 10/19/2024] Open
Abstract
Multiple sclerosis (MS) is a demyelinating autoimmune disease characterized by early onset, for which the interaction of genetic and environmental factors is crucial. Dysregulation of the immune system as well as myelinization-de-myelinization has been shown to correlate with changes in RNA, including non-coding RNAs. Recently, circular RNAs (circRNAs) have emerged as a key player in the complex network of gene dysregulation associated with MS. Despite several efforts, the mechanisms driving circRNA regulation and dysregulation in MS still need to be properly elucidated. Here, we explore the panorama of circRNA expression in PBMCs purified from five newly diagnosed MS patients and five healthy controls (HCs) using the Arraystar Human circRNAs microarray. Experimental validation was then carried out in a validation cohort, and a possible correlation with disease severity was tested. We identified 64 differentially expressed circRNAs, 53 of which were downregulated in PBMCs purified from MS compared to the HCs. The discovery dataset was subsequently validated using qRT-PCR with an independent cohort of 20 RRMS patients and 20 HCs. We validated seven circRNAs differentially expressed in the RRMS group versus the HC group. hsa_circ_0000518, hsa_circ_0000517, hsa_circ_0000514, and hsa_circ_0000511 were significantly upregulated in the MS group, while hsa_circ_0018905, hsa_circ_0048764, and hsa_circ_0003445 were significantly downregulated; Among them, the expression level of hsa_circ_0018905 was significantly decreased in patients showing a higher level of disability and in progressive forms of MS. We described the circRNAs expression profile of PBMCs in newly diagnosed MS patients and proposed hsa_circ_0018905 as potential MS biomarker.
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Affiliation(s)
- Valeria Lodde
- Department of Biomedical Sciences, University of Sassari, Sassari 07100, Italy; (V.L.); (I.C.); (G.D.); (M.F.)
| | - Ignazio Roberto Zarbo
- Department of Medicine, Surgery and Pharmacy, University of Sassari, Sassari 07100, Italy; (I.R.Z.); (A.M.); (P.S.); (M.R.M.)
- Unit of Clinical Neurology, AOU, Sassari 07100, Italy;
| | | | - Aurora Masia
- Department of Medicine, Surgery and Pharmacy, University of Sassari, Sassari 07100, Italy; (I.R.Z.); (A.M.); (P.S.); (M.R.M.)
- Department of Medical Sciences and Public Health, University of Cagliari, Cagliari 09042, Italy
| | - Paolo Solla
- Department of Medicine, Surgery and Pharmacy, University of Sassari, Sassari 07100, Italy; (I.R.Z.); (A.M.); (P.S.); (M.R.M.)
- Unit of Clinical Neurology, AOU, Sassari 07100, Italy;
| | - Ilaria Campesi
- Department of Biomedical Sciences, University of Sassari, Sassari 07100, Italy; (V.L.); (I.C.); (G.D.); (M.F.)
| | - Giuseppe Delogu
- Department of Biomedical Sciences, University of Sassari, Sassari 07100, Italy; (V.L.); (I.C.); (G.D.); (M.F.)
| | - Maria Rosaria Muroni
- Department of Medicine, Surgery and Pharmacy, University of Sassari, Sassari 07100, Italy; (I.R.Z.); (A.M.); (P.S.); (M.R.M.)
| | - Dimitrios Tsitsipatis
- Laboratory of Genetics and Genomics, National Institute on Aging Intramural Research Program, National Institutes of Health, Baltimore, MD 21224, USA; (D.T.); (M.G.)
| | - Myriam Gorospe
- Laboratory of Genetics and Genomics, National Institute on Aging Intramural Research Program, National Institutes of Health, Baltimore, MD 21224, USA; (D.T.); (M.G.)
| | - Matteo Floris
- Department of Biomedical Sciences, University of Sassari, Sassari 07100, Italy; (V.L.); (I.C.); (G.D.); (M.F.)
| | - Maria Laura Idda
- Department of Biomedical Sciences, University of Sassari, Sassari 07100, Italy; (V.L.); (I.C.); (G.D.); (M.F.)
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Long BY, Wang Y, Hao SH, Shi G. Molecular significance of circRNAs in malignant lymphoproliferative disorders: pathogenesis and novel biomarkers or therapeutic targets. Am J Cancer Res 2024; 14:4633-4651. [PMID: 39417189 PMCID: PMC11477815 DOI: 10.62347/kmwb5164] [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: 05/06/2024] [Accepted: 09/22/2024] [Indexed: 10/19/2024] Open
Abstract
Recent studies have shown that circular RNAs (CircRNAs) have the novel functions and molecular mechanisms in the pathogenesis of malignant diseases. CircRNAs have been found to be associated with the occurrence and development of lymphoproliferative diseases, impacting on lymphocyte proliferation. This article provides a review of the pathogenesis of circRNAs in malignant lymphoproliferative disorders, focusing on conditions such as acute lymphocytic leukemia (ALL), chronic lymphocytic leukemia (CLL), and lymphoma. Additionally, it discusses the potential value of circRNAs as novel biomarkers or therapeutic targets in these disorders.
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Affiliation(s)
- Bo-Yang Long
- Department of Oncology and Hematology, The Second Hospital of Jilin UniversityChangchun, Jilin, China
| | - Yan Wang
- Department of Hematology, The Affiliated Yantai Yuhuangding Hospital of Qingdao UniversityYantai, Shandong, China
| | - Shu-Hong Hao
- Department of Oncology and Hematology, The Second Hospital of Jilin UniversityChangchun, Jilin, China
| | - Guang Shi
- Department of Oncology and Hematology, The Second Hospital of Jilin UniversityChangchun, Jilin, China
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Abohassan M, Khaleel AQ, Pallathadka H, Kumar A, Allela OQB, Hjazi A, Pramanik A, Mustafa YF, Hamzah HF, Mohammed BA. Circular RNA as a Biomarker for Diagnosis, Prognosis and Therapeutic Target in Acute and Chronic Lymphoid Leukemia. Cell Biochem Biophys 2024; 82:1979-1991. [PMID: 39136839 DOI: 10.1007/s12013-024-01404-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/03/2024] [Indexed: 10/02/2024]
Abstract
Circular RNAs (circRNAs) are single-stranded RNAs that have received much attention in recent years. CircRNAs lack a 5' head and a 3' poly-A tail. The structure of this type of RNAs make them resistant to digestion by exonucleases. CircRNAs are expressed in different cells and have various functions. The function of circRNAs is done by sponging miRNAs, changing gene expression, and protein production. The expression of circRNAs changes in different types of cancers, which causes changes in cell growth, proliferation, differentiation, and apoptosis. Changes in the expression of circRNAs can cause the invasion and progression of tumors. Studies have shown that changes in the expression of circRNAs can be seen in acute lymphoid leukemia (ALL) and chronic lymphoid leukemia (CLL). The conducted studies aim to identify circRNAs whose expression has changed in these leukemias and their more precise function so that these circRNAs can be identified as biomarkers, prediction of patient prognosis, and treatment targets for ALL and CLL patients. In this study, we review the studies conducted on the role and function of circRNAs in ALL and CLL patients. The results of the studies show that there is a possibility of using circRNAs as biomarkers in the identification and treatment of patients in the future.
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MESH Headings
- Humans
- RNA, Circular/genetics
- RNA, Circular/metabolism
- Biomarkers, Tumor/genetics
- Biomarkers, Tumor/metabolism
- Leukemia, Lymphocytic, Chronic, B-Cell/diagnosis
- Leukemia, Lymphocytic, Chronic, B-Cell/genetics
- Leukemia, Lymphocytic, Chronic, B-Cell/metabolism
- Leukemia, Lymphocytic, Chronic, B-Cell/drug therapy
- Prognosis
- Precursor Cell Lymphoblastic Leukemia-Lymphoma/diagnosis
- Precursor Cell Lymphoblastic Leukemia-Lymphoma/genetics
- Precursor Cell Lymphoblastic Leukemia-Lymphoma/metabolism
- Precursor Cell Lymphoblastic Leukemia-Lymphoma/therapy
- RNA/metabolism
- RNA/genetics
- MicroRNAs/genetics
- MicroRNAs/metabolism
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Affiliation(s)
- Mohammad Abohassan
- Department of Clinical Laboratory Sciences, College of Applied Medical Sciences, King Khalid University, Abha, Saudi Arabia
| | - Abdulrahman Qais Khaleel
- Department of Medical Instruments Engineering, Al-Maarif University College, Al Anbar, 31001, Iraq.
| | | | - Ashwani Kumar
- Department of Life Sciences, School of Sciences, Jain (Deemed-to-be) University, Bengaluru, Karnataka, 560069, India
- Department of Pharmacy, Vivekananda Global University, Jaipur, Rajasthan, 303012, India
| | | | - Ahmed Hjazi
- Department of Medical Laboratory, College of Applied Medical Sciences, Prince Sattam bin Abdulaziz University, Al-Kharj, 11942, Saudi Arabia
| | - Atreyi Pramanik
- School of Applied and Life Sciences, Ivison of Research and Innovation Uttaranchal University, Dehradun, India
| | - Yasser Fakri Mustafa
- Department of Pharmaceutical Chemistry, College of Pharmacy, University of Mosul, Mosul, 41001, Iraq
| | - Hamza Fadhel Hamzah
- Department of Medical Laboratories Technology, AL-Nisour University College, Baghdad, Iraq
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Wang Y, Zhang J, Yang Y, Liu Z, Sun S, Li R, Zhu H, Li T, Zheng J, Li J, Ma L. Circular RNAs in human diseases. MedComm (Beijing) 2024; 5:e699. [PMID: 39239069 PMCID: PMC11374765 DOI: 10.1002/mco2.699] [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: 06/20/2023] [Revised: 07/25/2024] [Accepted: 07/30/2024] [Indexed: 09/07/2024] Open
Abstract
Circular RNAs (circRNAs) are a unique class of RNA molecules formed through back-splicing rather than linear splicing. As an emerging field in molecular biology, circRNAs have garnered significant attention due to their distinct structure and potential functional implications. A comprehensive understanding of circRNAs' functions and potential clinical applications remains elusive despite accumulating evidence of their involvement in disease pathogenesis. Recent research highlights their significant roles in various human diseases, but comprehensive reviews on their functions and applications remain scarce. This review provides an in-depth examination of circRNAs, focusing first on their involvement in non-neoplastic diseases such as respiratory, endocrine, metabolic, musculoskeletal, cardiovascular, and renal disorders. We then explore their roles in tumors, with particular emphasis on exosomal circular RNAs, which are crucial for cancer initiation, progression, and resistance to treatment. By detailing their biogenesis, functions, and impact on disease mechanisms, this review underscores the potential of circRNAs as diagnostic biomarkers and therapeutic targets. The review not only enhances our understanding of circRNAs' roles in specific diseases and tumor types but also highlights their potential as novel diagnostic and therapeutic tools, thereby paving the way for future clinical investigations and potential therapeutic interventions.
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Affiliation(s)
- Yuanyong Wang
- Department of Thoracic Surgery Tangdu Hospital Air Force Medical University Xi'an China
- Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education) The First Department of Thoracic Surgery Peking University Cancer Hospital and Institute Peking University School of Oncology Beijing China
| | - Jin Zhang
- Department of Traditional Chinese Medicine Tangdu Hospital Air Force Medical University Xi'an China
- Key Laboratory of Integrated Traditional Chinese and Western Medicine Tumor Diagnosis and Treatment in Shaanxi Province Xi'an China
| | - Yuchen Yang
- Department of Traditional Chinese Medicine Tangdu Hospital Air Force Medical University Xi'an China
- Key Laboratory of Integrated Traditional Chinese and Western Medicine Tumor Diagnosis and Treatment in Shaanxi Province Xi'an China
| | - Zhuofeng Liu
- Department of Traditional Chinese Medicine The Third Affiliated Hospital of Xi'an Medical University Xi'an China
| | - Sijia Sun
- Department of Traditional Chinese Medicine Tangdu Hospital Air Force Medical University Xi'an China
- Key Laboratory of Integrated Traditional Chinese and Western Medicine Tumor Diagnosis and Treatment in Shaanxi Province Xi'an China
| | - Rui Li
- Department of Epidemiology School of Public Health Air Force Medical University Xi'an China
| | - Hui Zhu
- Department of Anatomy Medical College of Yan'an University Yan'an China
- Institute of Medical Research Northwestern Polytechnical University Xi'an China
| | - Tian Li
- School of Basic Medicine Fourth Military Medical University Xi'an China
| | - Jin Zheng
- Department of Traditional Chinese Medicine Tangdu Hospital Air Force Medical University Xi'an China
- Key Laboratory of Integrated Traditional Chinese and Western Medicine Tumor Diagnosis and Treatment in Shaanxi Province Xi'an China
| | - Jie Li
- Department of Endocrine Xijing 986 Hospital Air Force Medical University Xi'an China
| | - Litian Ma
- Department of Thoracic Surgery Tangdu Hospital Air Force Medical University Xi'an China
- Department of Traditional Chinese Medicine Tangdu Hospital Air Force Medical University Xi'an China
- Key Laboratory of Integrated Traditional Chinese and Western Medicine Tumor Diagnosis and Treatment in Shaanxi Province Xi'an China
- Department of Gastroenterology Tangdu Hospital Air Force Medical University Xi'an China
- School of Medicine Northwest University Xi'an China
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张 欢, 吴 斌, 王 月. [Molecular Mechanism of circVRK1 Regulating the Proliferation and Apoptosis of Acute Lymphoblastic Leukemia KOCL44 Cells by Targeting miR-4428]. SICHUAN DA XUE XUE BAO. YI XUE BAN = JOURNAL OF SICHUAN UNIVERSITY. MEDICAL SCIENCE EDITION 2024; 55:872-877. [PMID: 39170007 PMCID: PMC11334292 DOI: 10.12182/20240760102] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/17/2024] [Indexed: 08/23/2024]
Abstract
Objective To elucidate the role of circVRK1 and its interaction with miR-4428 in regulating proliferation and apoptosis in acute lymphoblastic leukemia (ALL) cells. Methods KOCL44 ALL cells were cultured in vitro, and experimental groups included pcDNA, pcDNA-circVRK1, anti-miR-NC, anti-miR-4428, si-NC, si-circVRK1, pcDNA-circVRK1+miR-NC, and pcDNA-circVRK1+miR-4428. The expression levels of circVRK1 and miR-4428 were detected using qRT-PCR. CCK-8 assays and flow cytometry were used to assess cell proliferation and apoptosis, respectively. The dual luciferase reporter assays were employed to investigate the interaction between circVRK1 and miR-4428, with groups categorized as WT-circVRK1+miR-NC, WT-circVRK1+miR-4428, MUT-circVRK1+miR-NC, and MUT-circVRK1+ miR-4428. Western blotting was utilized to detect the expression levels of Ki-67, cleaved caspase-3, and cleaved caspase-9 proteins. Results Compared to the pcDNA group, circVRK1 expression was up-regulated in the pcDNA-circVRK1 group (P<0.05). Compared to transfection with pcDNA or anti-miR-NC, transfection with pcDNA-circVRK1 or anti-miR-4428 led to decreased cell viability and Ki-67 protein levels in KOCL44 cells (P<0.05), and increased apoptosis rates and levels of cleaved caspase-3 and cleaved caspase-9 (P<0.05). circVRK1 was found to negatively regulate miR-4428 expression, with this effect observed only in the WT-circVRK1 group. miR-4428 levels were lower in the pcDNA-circVRK1 group compared to the pcDNA group (P<0.05) and higher in the si-circVRK1 group compared to the si-NC group (P<0.05). Co-transfection with pcDNA-circVRK1+miR-4428 resulted in increased cell viability (P<0.05) and Ki-67 expression (P<0.05), and decreased apoptosis rates and levels of cleaved caspase-3 and cleaved caspase-9 (P<0.05) compared to co-transfection with pcDNA-circVRK1+miR-NC. Conclusion Overexpression of circVRK1 reduces the proliferation ability of acute ALL cells and induces cell apoptosis by downregulating miR-4428 expression.
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Affiliation(s)
- 欢 张
- 中国医科大学附属盛京医院 血液内科 (沈阳 110004)Department of Hematology, Shengjing Hospital Affiliated to China Medical University, Shenyang 110004, China
| | - 斌 吴
- 中国医科大学附属盛京医院 血液内科 (沈阳 110004)Department of Hematology, Shengjing Hospital Affiliated to China Medical University, Shenyang 110004, China
| | - 月娇 王
- 中国医科大学附属盛京医院 血液内科 (沈阳 110004)Department of Hematology, Shengjing Hospital Affiliated to China Medical University, Shenyang 110004, China
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Dastsooz H, Anselmi F, Lauria A, Cicconetti C, Proserpio V, Mohammadisoleimani E, Firoozi Z, Mansoori Y, Haghi-Aminjan H, Caizzi L, Oliviero S. Involvement of N4BP2L1, PLEKHA4, and BEGAIN genes in breast cancer and muscle cell development. Front Cell Dev Biol 2024; 12:1295403. [PMID: 38859961 PMCID: PMC11163233 DOI: 10.3389/fcell.2024.1295403] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2023] [Accepted: 04/22/2024] [Indexed: 06/12/2024] Open
Abstract
Patients with breast cancer show altered expression of genes within the pectoralis major skeletal muscle cells of the breast. Through analyses of The Cancer Genome Atlas (TCGA)-breast cancer (BRCA), we identified three previously uncharacterized putative novel tumor suppressor genes expressed in normal muscle cells, whose expression was downregulated in breast tumors. We found that NEDD4 binding protein 2-like 1 (N4BP2L1), pleckstrin homology domain-containing family A member 4 (PLEKHA4), and brain-enriched guanylate kinase-associated protein (BEGAIN) that are normally highly expressed in breast myoepithelial cells and smooth muscle cells were significantly downregulated in breast tumor tissues of a cohort of 50 patients with this cancer. Our data revealed that the low expression of PLEKHA4 in patients with menopause below 50 years correlated with a higher risk of breast cancer. Moreover, we identified N4BP2L1 and BEGAIN as potential biomarkers of HER2-positive breast cancer. Furthermore, low BEGAIN expression in breast cancer patients with blood fat, heart problems, and diabetes correlated with a higher risk of this cancer. In addition, protein and RNA expression analysis of TCGA-BRCA revealed N4BP2L1 as a promising diagnostic protein biomarker in breast cancer. In addition, the in silico data of scRNA-seq showed high expression of these genes in several cell types of normal breast tissue, including breast myoepithelial cells and smooth muscle cells. Thus, our results suggest their possible tumor-suppressive function in breast cancer and muscle development.
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Affiliation(s)
- Hassan Dastsooz
- Department of Life Sciences and Systems Biology, University of Turin, Turin, Italy
- IIGM-Italian Institute for Genomic Medicine, IRCCS, Candiolo, TO, Italy
- Candiolo Cancer Institute, FPO-IRCCS, Candiolo Cancer (IT), Torino, Italy
| | - Francesca Anselmi
- Department of Life Sciences and Systems Biology, University of Turin, Turin, Italy
| | - Andrea Lauria
- Department of Life Sciences and Systems Biology, University of Turin, Turin, Italy
| | - Chiara Cicconetti
- Department of Life Sciences and Systems Biology, University of Turin, Turin, Italy
| | - Valentina Proserpio
- Department of Life Sciences and Systems Biology, University of Turin, Turin, Italy
| | | | - Zahra Firoozi
- Department of Medical Genetics, Fasa University of Medical Sciences, Fasa, Iran
| | - Yaser Mansoori
- Department of Medical Genetics, Fasa University of Medical Sciences, Fasa, Iran
- Noncommunicable Diseases Research Center, Fasa University of Medical Sciences, Fasa, Iran
| | - Hamed Haghi-Aminjan
- Pharmaceutical Sciences Research Center, Ardabil University of Medical Sciences, Ardabil, Iran
| | - Livia Caizzi
- Department of Life Sciences and Systems Biology, University of Turin, Turin, Italy
| | - Salvatore Oliviero
- Department of Life Sciences and Systems Biology, University of Turin, Turin, Italy
- IIGM-Italian Institute for Genomic Medicine, IRCCS, Candiolo, TO, Italy
- Candiolo Cancer Institute, FPO-IRCCS, Candiolo Cancer (IT), Torino, Italy
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Tretti Parenzan C, Molin AD, Longo G, Gaffo E, Buratin A, Cani A, Boldrin E, Serafin V, Guglielmelli P, Vannucchi AM, Cazzaniga G, Biondi A, Locatelli F, Meyer LH, Buldini B, te Kronnie G, Bresolin S, Bortoluzzi S. Functional relevance of circRNA aberrant expression in pediatric acute leukemia with KMT2A::AFF1 fusion. Blood Adv 2024; 8:1305-1319. [PMID: 38029383 PMCID: PMC10918493 DOI: 10.1182/bloodadvances.2023011291] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2023] [Revised: 10/31/2023] [Accepted: 11/02/2023] [Indexed: 12/01/2023] Open
Abstract
ABSTRACT Circular RNAs (circRNAs) are emerging molecular players in leukemogenesis and promising therapeutic targets. In KMT2A::AFF1 (MLL::AF4)-rearranged leukemia, an aggressive disease compared with other pediatric B-cell precursor (BCP) acute lymphoblastic leukemia (ALL), data about circRNAs are limited. Here, we disclose the circRNA landscape of infant patients with KMT2A::AFF1 translocated BCP-ALL showing dysregulated, mostly ectopically expressed, circRNAs in leukemia cells. Most of these circRNAs, apart from circHIPK3 and circZNF609, previously associated with oncogenic behavior in ALL, are still uncharacterized. An in vitro loss-of-function screening identified an oncogenic role of circFKBP5, circKLHL2, circNR3C1, and circPAN3 in KMT2A::AFF1 ALL, whose silencing affected cell proliferation and apoptosis. Further study in an extended cohort disclosed a significantly correlated expression of these oncogenic circRNAs and their putative involvement in common regulatory networks. Moreover, it showed that circAFF1 upregulation occurs in a subset of cases with HOXA KMT2A::AFF1 ALL. Collectively, functional analyses and patient data reveal oncogenic circRNA upregulation as a relevant mechanism that sustains the malignant cell phenotype in KMT2A::AFF1 ALL.
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Affiliation(s)
- Caterina Tretti Parenzan
- Pediatric Hematology, Oncology and Stem Cell Transplant Division, Women and Child Health Department, Padua University and Hospital, Padua, Italy
| | - Anna Dal Molin
- Department of Molecular Medicine, University of Padova, Padova, Italy
| | - Giorgia Longo
- Pediatric Hematology, Oncology and Stem Cell Transplant Division, Women and Child Health Department, Padua University and Hospital, Padua, Italy
- Department of Molecular Medicine, University of Padova, Padova, Italy
| | - Enrico Gaffo
- Department of Molecular Medicine, University of Padova, Padova, Italy
| | - Alessia Buratin
- Department of Molecular Medicine, University of Padova, Padova, Italy
- Department of Biology, University of Padova, Padova, Italy
| | - Alice Cani
- Pediatric Hematology, Oncology and Stem Cell Transplant Division, Women and Child Health Department, Padua University and Hospital, Padua, Italy
| | - Elena Boldrin
- Department of Biology, University of Padova, Padova, Italy
- Ulm University Medical Center, Department of Pediatric and Adolescent Medicine, Ulm, Germany
| | - Valentina Serafin
- Onco-Hematology, Stem Cell Transplant and Gene Therapy, Istituto di Ricerca Pediatrica Foundation - Città della Speranza, Padua, Italy
| | - Paola Guglielmelli
- Azienda Ospedaliero Universitaria Careggi, University of Florence, Florence, Italy
| | | | - Giovanni Cazzaniga
- Tettamanti Center, Fondazione IRCCS San Gerardo dei Tintori, Monza, Italia
- School of Medicine and Surgery, University of Milano-Bicocca, Milano, Italy
| | - Andrea Biondi
- School of Medicine and Surgery, University of Milano-Bicocca, Milano, Italy
- Department of Pediatrics, Fondazione IRCCS San Gerardo dei Tintori, Monza, Italy
| | - Franco Locatelli
- Department of Paediatric Haematology and Oncology, IRCCS Ospedale Pediatrico Bambino Gesù, Catholic University of the Sacred Heart, Rome, Italy
| | - Lueder H. Meyer
- Ulm University Medical Center, Department of Pediatric and Adolescent Medicine, Ulm, Germany
| | - Barbara Buldini
- Pediatric Hematology, Oncology and Stem Cell Transplant Division, Women and Child Health Department, Padua University and Hospital, Padua, Italy
- Onco-Hematology, Stem Cell Transplant and Gene Therapy, Istituto di Ricerca Pediatrica Foundation - Città della Speranza, Padua, Italy
| | | | - Silvia Bresolin
- Pediatric Hematology, Oncology and Stem Cell Transplant Division, Women and Child Health Department, Padua University and Hospital, Padua, Italy
- Onco-Hematology, Stem Cell Transplant and Gene Therapy, Istituto di Ricerca Pediatrica Foundation - Città della Speranza, Padua, Italy
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8
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Gomez EW, De Paula LB, Weimer RD, Hellwig AHDS, Rodrigues GM, Alegretti AP, de Oliveira JR. The potential of circHIPK3 as a biomarker in chronic myeloid leukemia. Front Oncol 2024; 14:1330592. [PMID: 38505596 PMCID: PMC10948418 DOI: 10.3389/fonc.2024.1330592] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2023] [Accepted: 02/14/2024] [Indexed: 03/21/2024] Open
Abstract
Chronic myeloid leukemia (CML) is a myeloproliferative disorder characterized by leukocytosis and left shift. The primary molecular alteration is the BCR::ABL1, chimeric oncoprotein with tyrosine kinase activity, responsible for the initial oncogenesis of the disease. Therapy of CML was revolutionized with the advent of tyrosine kinase inhibitors, but it is still not considered curative and may present resistance and serious adverse effects. Discoveries in CML inaugurated a new era in cancer treatment and despite all the advances, a new biomarker is needed to detect resistance and adverse effects. Circular RNAs (circRNAs) are a special type of non-coding RNA formed through a process called backsplicing. The majority of circRNAs are derived from protein-coding genes. CircHIPK3 is formed from the second exon of the HIPK3 gene and has been found in various pathologies, including different types of cancer. New approaches have demonstrated the potential of circular RNAs in cancer research, and circHIPK3 has shown promising results. It is often associated with cellular regulatory pathways, suggesting an important role in the molecular dynamics of tumors. The identification of biomarkers is an important tool for therapeutic improvement; thus we review the role of circHIPK3 and its potential as a biomarker in CML.
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Affiliation(s)
- Eduardo Wandame Gomez
- Laboratory of Cell Biophysics and Inflammation, School of Health and Life Sciences, Pontifícia Universidade Católica do Rio Grande do Sul, Porto Alegre, Brazil
- Laboratory of Molecular Biology, Laboratory Diagnostic Service, Hospital de Clínicas de Porto Alegre, Porto Alegre, Brazil
| | - Laura Berti De Paula
- Laboratory of Cell Biophysics and Inflammation, School of Health and Life Sciences, Pontifícia Universidade Católica do Rio Grande do Sul, Porto Alegre, Brazil
| | - Rafael Diogo Weimer
- Laboratory of Cell Biophysics and Inflammation, School of Health and Life Sciences, Pontifícia Universidade Católica do Rio Grande do Sul, Porto Alegre, Brazil
| | | | - Grazielle Motta Rodrigues
- Laboratory of Molecular Biology, Laboratory Diagnostic Service, Hospital de Clínicas de Porto Alegre, Porto Alegre, Brazil
| | - Ana Paula Alegretti
- Laboratory of Molecular Biology, Laboratory Diagnostic Service, Hospital de Clínicas de Porto Alegre, Porto Alegre, Brazil
| | - Jarbas Rodrigues de Oliveira
- Laboratory of Cell Biophysics and Inflammation, School of Health and Life Sciences, Pontifícia Universidade Católica do Rio Grande do Sul, Porto Alegre, Brazil
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Gutierrez-Camino A, Caron M, Richer C, Fuchs C, Illarregi U, Poncelet L, St-Onge P, Bataille AR, Tremblay-Dauphinais P, Lopez-Lopez E, Camos M, Ramirez-Orellana M, Astigarraga I, Lécuyer É, Bourque G, Martin-Guerrero I, Sinnett D. CircRNAome of Childhood Acute Lymphoblastic Leukemia: Deciphering Subtype-Specific Expression Profiles and Involvement in TCF3::PBX1 ALL. Int J Mol Sci 2024; 25:1477. [PMID: 38338754 PMCID: PMC10855129 DOI: 10.3390/ijms25031477] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2023] [Revised: 01/15/2024] [Accepted: 01/18/2024] [Indexed: 02/12/2024] Open
Abstract
Childhood B-cell acute lymphoblastic leukemia (B-ALL) is a heterogeneous disease comprising multiple molecular subgroups with subtype-specific expression profiles. Recently, a new type of ncRNA, termed circular RNA (circRNA), has emerged as a promising biomarker in cancer, but little is known about their role in childhood B-ALL. Here, through RNA-seq analysis in 105 childhood B-ALL patients comprising six genetic subtypes and seven B-cell controls from two independent cohorts we demonstrated that circRNAs properly stratified B-ALL subtypes. By differential expression analysis of each subtype vs. controls, 156 overexpressed and 134 underexpressed circRNAs were identified consistently in at least one subtype, most of them with subtype-specific expression. TCF3::PBX1 subtype was the one with the highest number of unique and overexpressed circRNAs, and the circRNA signature could effectively discriminate new patients with TCF3::PBX1 subtype from others. Our results indicated that NUDT21, an RNA-binding protein (RBP) involved in circRNA biogenesis, may contribute to this circRNA enrichment in TCF3::PBX1 ALL. Further functional characterization using the CRISPR-Cas13d system demonstrated that circBARD1, overexpressed in TCF3::PBX1 patients and regulated by NUDT21, might be involved in leukemogenesis through the activation of p38 via hsa-miR-153-5p. Our results suggest that circRNAs could play a role in the pathogenesis of childhood B-ALL.
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Affiliation(s)
- Angela Gutierrez-Camino
- Division of Hematology-Oncology, CHU Sainte-Justine Research Center, Montreal, QC H3T 1C5, Canada; (A.G.-C.); (M.C.); (C.R.); (C.F.); (L.P.); (P.S.-O.); (A.R.B.); (P.T.-D.)
| | - Maxime Caron
- Division of Hematology-Oncology, CHU Sainte-Justine Research Center, Montreal, QC H3T 1C5, Canada; (A.G.-C.); (M.C.); (C.R.); (C.F.); (L.P.); (P.S.-O.); (A.R.B.); (P.T.-D.)
- Department of Human Genetics, McGill University, Montreal, QC H3A 0G4, Canada;
| | - Chantal Richer
- Division of Hematology-Oncology, CHU Sainte-Justine Research Center, Montreal, QC H3T 1C5, Canada; (A.G.-C.); (M.C.); (C.R.); (C.F.); (L.P.); (P.S.-O.); (A.R.B.); (P.T.-D.)
| | - Claire Fuchs
- Division of Hematology-Oncology, CHU Sainte-Justine Research Center, Montreal, QC H3T 1C5, Canada; (A.G.-C.); (M.C.); (C.R.); (C.F.); (L.P.); (P.S.-O.); (A.R.B.); (P.T.-D.)
| | - Unai Illarregi
- Department of Genetics, Physical Anthropology and Animal Physiology, Faculty of Science and Technology, University of the Basque Country (UPV/EHU), 48940 Leioa, Spain; (U.I.); (I.M.-G.)
| | - Lucas Poncelet
- Division of Hematology-Oncology, CHU Sainte-Justine Research Center, Montreal, QC H3T 1C5, Canada; (A.G.-C.); (M.C.); (C.R.); (C.F.); (L.P.); (P.S.-O.); (A.R.B.); (P.T.-D.)
| | - Pascal St-Onge
- Division of Hematology-Oncology, CHU Sainte-Justine Research Center, Montreal, QC H3T 1C5, Canada; (A.G.-C.); (M.C.); (C.R.); (C.F.); (L.P.); (P.S.-O.); (A.R.B.); (P.T.-D.)
| | - Alain R. Bataille
- Division of Hematology-Oncology, CHU Sainte-Justine Research Center, Montreal, QC H3T 1C5, Canada; (A.G.-C.); (M.C.); (C.R.); (C.F.); (L.P.); (P.S.-O.); (A.R.B.); (P.T.-D.)
| | - Pascal Tremblay-Dauphinais
- Division of Hematology-Oncology, CHU Sainte-Justine Research Center, Montreal, QC H3T 1C5, Canada; (A.G.-C.); (M.C.); (C.R.); (C.F.); (L.P.); (P.S.-O.); (A.R.B.); (P.T.-D.)
| | - Elixabet Lopez-Lopez
- Department of Biochemistry and Molecular Biology, Faculty of Science and Technology, University of the Basque Country (UPV/EHU), 48940 Leioa, Spain;
- Pediatric Oncology Group, Biobizkaia Health Research Institute, 48903 Barakaldo, Spain;
| | - Mireia Camos
- Hematology Laboratory, Sant Joan de Déu Research Institute, Esplugues de Llobregat, 08950 Barcelona, Spain;
| | - Manuel Ramirez-Orellana
- Department of Pediatric Hematology and Oncology, Niño Jesús University Hospital, 28009 Madrid, Spain;
| | - Itziar Astigarraga
- Pediatric Oncology Group, Biobizkaia Health Research Institute, 48903 Barakaldo, Spain;
- Department of Pediatrics, Cruces University Hospital, 48903 Barakaldo, Spain
| | - Éric Lécuyer
- Institut de Recherches Cliniques de Montréal (IRCM), Montreal, QC H2W 1R7, Canada;
- Département de Biochimie et Médecine Moléculaire, Université de Montréal, Montreal, QC H3C 3J7, Canada
- Division of Experimental Medicine, McGill University, Montreal, QC H3A 0G4, Canada
| | - Guillaume Bourque
- Department of Human Genetics, McGill University, Montreal, QC H3A 0G4, Canada;
| | - Idoia Martin-Guerrero
- Department of Genetics, Physical Anthropology and Animal Physiology, Faculty of Science and Technology, University of the Basque Country (UPV/EHU), 48940 Leioa, Spain; (U.I.); (I.M.-G.)
- Pediatric Oncology Group, Biobizkaia Health Research Institute, 48903 Barakaldo, Spain;
| | - Daniel Sinnett
- Division of Hematology-Oncology, CHU Sainte-Justine Research Center, Montreal, QC H3T 1C5, Canada; (A.G.-C.); (M.C.); (C.R.); (C.F.); (L.P.); (P.S.-O.); (A.R.B.); (P.T.-D.)
- Department of Pediatrics, Faculty of Medicine, University of Montreal, Montreal, QC H3C 3J7, Canada
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10
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Liu X, Ali MK, Dua K, Mao Y, Liu J. Circular RNAs: emerging players in asthma and COPD. Front Cell Dev Biol 2023; 11:1267792. [PMID: 38078005 PMCID: PMC10704470 DOI: 10.3389/fcell.2023.1267792] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2023] [Accepted: 11/14/2023] [Indexed: 10/16/2024] Open
Abstract
Circular RNAs (circRNAs) belong to a unique class of endogenously expressed non-protein-coding RNAs with a distinct circularized structure, characterized by the absence of 5'-cap and 3'-polyadenylate ends. They are generally formed through back-splicing from pre-mRNAs. They serve as regulators of transcription and splicing, and act as sponges for microRNAs (miRNAs) and RNA-binding proteins, thereby modulating the expression of target genes. As a result, they exert a substantial impact on a diverse array of cellular and biological processes, including cell proliferation, migration, inflammation, and oxidative stress. Asthma and COPD are chronic airway conditions that currently have no cure. In recent years, emerging evidence suggests that altered expression of circRNAs in airway, bronchial and immune cells is involved in asthma and COPD pathogenesis. Studies exploring circRNA dysregulation in asthma have showcased their involvement in regulating the proliferation, migration, and inflammation of airway smooth muscle and bronchial epithelial cells, as well as impacting goblet cell metaplasia, Th2 cell differentiation, and macrophage activation, primarily through interactions with miRNAs. Similarly, in COPD, circRNAs have shown altered expression patterns in the blood and lungs of patients, and these changes have been linked to modulating inflammation, oxidative stress, and airway remodeling in preclinical models. Furthermore, certain circRNAs have demonstrated promising potential as diagnostic and prognostic biomarkers for both asthma and COPD. This review delves into the current understanding of the function and molecular mechanisms of circRNAs in asthma and COPD, along with exploring their potential as biomarkers in these respiratory conditions.
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Affiliation(s)
- Xiaoying Liu
- Department of Breast Surgery, The First Affiliated Hospital of China Medical University, Shenyang, China
| | - Md Khadem Ali
- Pre-Professional Health Academic Program, California State University, Hayward, CA, United States
| | - Kamal Dua
- Discipline of Pharmacy, Graduate School of Health, University of Technology Sydney, Sydney, NSW, Australia
- Faculty of Health, Australian Research Centre in Complementary and Integrative Medicine, University of Technology Sydney, Ultimo, NSW, Australia
- Uttaranchal Institute of Pharmaceutical Sciences, Uttaranchal University, Dehradun, India
| | - Yuqiang Mao
- Department of Thoracic Surgery, Shengjing Hospital of China Medical University, Shenyang, China
- Clinical Skills Practice Teaching Center, Shengjing Hospital of China Medical University, Shenyang, China
| | - Jun Liu
- Department of Thoracic Surgery, Shengjing Hospital of China Medical University, Shenyang, China
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11
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Zeng M, Yan S, Yang P, Li Q, Li J, Fan X, Liu X, Yao Y, Wang W, Chen R, Han G, Yang Y, Tang Z. Circular RNA transcriptome across multiple tissues reveal skeletal muscle-specific circPSME4 regulating myogenesis. Int J Biol Macromol 2023; 251:126322. [PMID: 37591436 DOI: 10.1016/j.ijbiomac.2023.126322] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2023] [Revised: 08/01/2023] [Accepted: 08/03/2023] [Indexed: 08/19/2023]
Abstract
There are significant differences in meat production, growth rate and other traits between Western commercial pigs and Chinese local pigs. Comparative transcriptome approaches have identified many coding and non-coding candidate genes associated various traits. However, the expression and function of circular RNAs (circRNAs) in different pig tissues are largely unknown. In this study, we conducted a comprehensive analysis of the genome-wide circRNA expression profile across ten tissues in Luchuan (a Chinese local breed) and Duroc (a Western commercial breed) pigs. We identified a total of 56,254 circRNAs, of which 42.9 % were not previously annotated. We found that 33.7 % of these circRNAs were differentially expressed. Enrichment analysis revealed that differentially expressed circRNAs might contribute to the phenotypic differentiation between Luchuan and Duroc pigs. We identified 538 tissue-specific circRNAs, most of which were specifically expressed in the brain and skeletal muscle. Competitive endogenous RNA network analysis suggested that skeletal muscle-specific circPSME4 was co-expressed with MYOD1 and targeted by ssc-miR-181d-3p. Functional analysis revealed that circPSME4 knockdown could promote the proliferation and differentiation of myoblasts. Together, our findings provide valuable resources of circRNAs for animal breeding and biomedical research. We demonstrated that circPSME4 is a novel regulator of skeletal muscle development.
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Affiliation(s)
- Mu Zeng
- Kunpeng Institute of Modern Agriculture at Foshan, Agricultural Genomics Institute, Chinese Academy of Agricultural Sciences, Foshan 528226, China; Shenzhen Branch, Guangdong Laboratory for Lingnan Modern Agriculture, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen 518124, China; Key Laboratory of Livestock and Poultry Multi-Omics of MARA, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen 518124, China
| | - Shanying Yan
- Kunpeng Institute of Modern Agriculture at Foshan, Agricultural Genomics Institute, Chinese Academy of Agricultural Sciences, Foshan 528226, China; Shenzhen Branch, Guangdong Laboratory for Lingnan Modern Agriculture, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen 518124, China; Key Laboratory of Livestock and Poultry Multi-Omics of MARA, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen 518124, China
| | - Peng Yang
- Kunpeng Institute of Modern Agriculture at Foshan, Agricultural Genomics Institute, Chinese Academy of Agricultural Sciences, Foshan 528226, China; School of Life Sciences, Henan University, Kaifeng 475004, China; Shenzhen Research Institute of Henan University, Shenzhen 518000, China; Shenzhen Branch, Guangdong Laboratory for Lingnan Modern Agriculture, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen 518124, China; Key Laboratory of Livestock and Poultry Multi-Omics of MARA, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen 518124, China
| | - Qiaowei Li
- Kunpeng Institute of Modern Agriculture at Foshan, Agricultural Genomics Institute, Chinese Academy of Agricultural Sciences, Foshan 528226, China; Shenzhen Branch, Guangdong Laboratory for Lingnan Modern Agriculture, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen 518124, China; Key Laboratory of Livestock and Poultry Multi-Omics of MARA, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen 518124, China; School of Veterinary Medicine, University College Dublin, Belfield, D04 V1W8 Dublin, Ireland
| | - Jiju Li
- Kunpeng Institute of Modern Agriculture at Foshan, Agricultural Genomics Institute, Chinese Academy of Agricultural Sciences, Foshan 528226, China; Shenzhen Branch, Guangdong Laboratory for Lingnan Modern Agriculture, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen 518124, China; Key Laboratory of Livestock and Poultry Multi-Omics of MARA, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen 518124, China
| | - Xinhao Fan
- Kunpeng Institute of Modern Agriculture at Foshan, Agricultural Genomics Institute, Chinese Academy of Agricultural Sciences, Foshan 528226, China; Shenzhen Branch, Guangdong Laboratory for Lingnan Modern Agriculture, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen 518124, China; Key Laboratory of Livestock and Poultry Multi-Omics of MARA, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen 518124, China
| | - Xiaoqin Liu
- Kunpeng Institute of Modern Agriculture at Foshan, Agricultural Genomics Institute, Chinese Academy of Agricultural Sciences, Foshan 528226, China; Shenzhen Branch, Guangdong Laboratory for Lingnan Modern Agriculture, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen 518124, China; Key Laboratory of Livestock and Poultry Multi-Omics of MARA, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen 518124, China
| | - Yilong Yao
- Kunpeng Institute of Modern Agriculture at Foshan, Agricultural Genomics Institute, Chinese Academy of Agricultural Sciences, Foshan 528226, China; Shenzhen Branch, Guangdong Laboratory for Lingnan Modern Agriculture, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen 518124, China; Key Laboratory of Livestock and Poultry Multi-Omics of MARA, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen 518124, China
| | - Wei Wang
- Kunpeng Institute of Modern Agriculture at Foshan, Agricultural Genomics Institute, Chinese Academy of Agricultural Sciences, Foshan 528226, China; Shenzhen Branch, Guangdong Laboratory for Lingnan Modern Agriculture, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen 518124, China; Key Laboratory of Livestock and Poultry Multi-Omics of MARA, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen 518124, China
| | - Ruipu Chen
- Kunpeng Institute of Modern Agriculture at Foshan, Agricultural Genomics Institute, Chinese Academy of Agricultural Sciences, Foshan 528226, China; Shenzhen Branch, Guangdong Laboratory for Lingnan Modern Agriculture, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen 518124, China; Key Laboratory of Livestock and Poultry Multi-Omics of MARA, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen 518124, China
| | - Guohao Han
- Kunpeng Institute of Modern Agriculture at Foshan, Agricultural Genomics Institute, Chinese Academy of Agricultural Sciences, Foshan 528226, China; Shenzhen Branch, Guangdong Laboratory for Lingnan Modern Agriculture, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen 518124, China; Key Laboratory of Livestock and Poultry Multi-Omics of MARA, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen 518124, China
| | - Yalan Yang
- Kunpeng Institute of Modern Agriculture at Foshan, Agricultural Genomics Institute, Chinese Academy of Agricultural Sciences, Foshan 528226, China; Shenzhen Branch, Guangdong Laboratory for Lingnan Modern Agriculture, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen 518124, China; Key Laboratory of Livestock and Poultry Multi-Omics of MARA, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen 518124, China.
| | - Zhonglin Tang
- Kunpeng Institute of Modern Agriculture at Foshan, Agricultural Genomics Institute, Chinese Academy of Agricultural Sciences, Foshan 528226, China; School of Life Sciences, Henan University, Kaifeng 475004, China; Shenzhen Research Institute of Henan University, Shenzhen 518000, China; Shenzhen Branch, Guangdong Laboratory for Lingnan Modern Agriculture, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen 518124, China; Key Laboratory of Livestock and Poultry Multi-Omics of MARA, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen 518124, China.
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12
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Bhardwaj V, Singh A, Choudhary A, Dalavi R, Ralte L, Chawngthu RL, Senthil Kumar N, Vijay N, Chande A. HIV-1 Vpr induces ciTRAN to prevent transcriptional repression of the provirus. SCIENCE ADVANCES 2023; 9:eadh9170. [PMID: 37672576 PMCID: PMC10482341 DOI: 10.1126/sciadv.adh9170] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2023] [Accepted: 08/02/2023] [Indexed: 09/08/2023]
Abstract
The functional consequences of circular RNA (circRNA) expression on HIV-1 replication are largely unknown. Using a customized protocol involving direct RNA nanopore sequencing, here, we captured circRNAs from HIV-1-infected T cells and identified ciTRAN, a circRNA that modulates HIV-1 transcription. We found that HIV-1 infection induces ciTRAN expression in a Vpr-dependent manner and that ciTRAN interacts with SRSF1, a protein known to repress HIV-1 transcription. Our results suggest that HIV-1 hijacks ciTRAN to exclude serine/arginine-rich splicing factor 1 (SRSF1) from the viral transcriptional complex, thereby promoting efficient viral transcription. In addition, we demonstrate that an SRSF1-inspired mimic can inhibit viral transcription regardless of ciTRAN induction. The hijacking of a host circRNA thus represents a previously unknown facet of primate lentiviruses in overcoming transmission bottlenecks.
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Affiliation(s)
- Vipin Bhardwaj
- Molecular Virology Laboratory, Department of Biological Sciences, Indian Institute of Science Education and Research (IISER), Bhopal, India
| | - Aman Singh
- Molecular Virology Laboratory, Department of Biological Sciences, Indian Institute of Science Education and Research (IISER), Bhopal, India
| | - Aditi Choudhary
- Molecular Virology Laboratory, Department of Biological Sciences, Indian Institute of Science Education and Research (IISER), Bhopal, India
| | - Rishikesh Dalavi
- Molecular Virology Laboratory, Department of Biological Sciences, Indian Institute of Science Education and Research (IISER), Bhopal, India
| | | | | | | | - Nagarjun Vijay
- Computational and Evolutionary Genomics Laboratory, Department of Biological Sciences, Indian Institute of Science Education and Research (IISER), Bhopal, India
| | - Ajit Chande
- Molecular Virology Laboratory, Department of Biological Sciences, Indian Institute of Science Education and Research (IISER), Bhopal, India
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13
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Tsai HK, Gogakos T, Lip V, Tsai JM, Li YD, Fisch AS, Weiss J, Yang W, Grimmett L, DiToro D, Schaefer EJ, Lindsley RC, Tran TH, Caron M, Langlois S, Sinnett D, Pikman Y, Nardi V, Kim AS, Silverman LB, Harris MH. Outlier Expression of Isoforms by Targeted or Total RNA Sequencing Identifies Clinically Significant Genomic Variants in Hematolymphoid Tumors. J Mol Diagn 2023; 25:665-681. [PMID: 37419244 PMCID: PMC10488324 DOI: 10.1016/j.jmoldx.2023.06.007] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2022] [Revised: 04/14/2023] [Accepted: 06/01/2023] [Indexed: 07/09/2023] Open
Abstract
Recognition of aberrant gene isoforms due to DNA events can impact risk stratification and molecular classification of hematolymphoid tumors. In myelodysplastic syndromes, KMT2A partial tandem duplication (PTD) was one of the top adverse predictors in the International Prognostic Scoring System-Molecular study. In B-cell acute lymphoblastic leukemia (B-ALL), ERG isoforms have been proposed as markers of favorable-risk DUX4 rearrangements, whereas deletion-mediated IKZF1 isoforms are associated with adverse prognosis and have been extended to the high-risk IKZF1plus signature defined by codeletions, including PAX5. In this limited study, outlier expression of isoforms as markers of IKZF1 intragenic or 3' deletions, DUX4 rearrangements, or PAX5 intragenic deletions were 92.3% (48/52), 90% (9/10), or 100% (9/9) sensitive, respectively, and 98.7% (368/373), 100% (35/35), or 97.1% (102/105) specific, respectively, by targeted RNA sequencing, and 84.0% (21/25), 85.7% (6/7), or 81.8% (9/11) sensitive, respectively, and 98.2% (109/111), 98.4% (127/129), or 98.7% (78/79) specific, respectively, by total RNA sequencing. Comprehensive split-read analysis identified expressed DNA breakpoints, cryptic splice sites associated with IKZF1 3' deletions, PTD of IKZF1 exon 5 spanning N159Y in B-ALL with mutated IKZF1 N159Y, and truncated KMT2A-PTD isoforms. Outlier isoforms were also effective targeted RNA markers for PAX5 intragenic amplifications (B-ALL), KMT2A-PTD (myeloid malignant cancers), and rare NOTCH1 intragenic deletions (T-cell acute lymphoblastic leukemia). These findings support the use of outlier isoform analysis as a robust strategy for detecting clinically significant DNA events.
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Affiliation(s)
- Harrison K Tsai
- Department of Pathology, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts; Department of Pathology, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts.
| | - Tasos Gogakos
- Department of Pathology, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts
| | - Va Lip
- Department of Pathology, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts
| | - Jonathan M Tsai
- Department of Pathology, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts
| | - Yen-Der Li
- Department of Medical Oncology, Dana-Farber Cancer Institute, Harvard Medical School, Boston, Massachusetts
| | - Adam S Fisch
- Department of Pathology, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts
| | - Jonathan Weiss
- Department of Pathology, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts
| | - Weiping Yang
- Department of Pathology, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts
| | - Leslie Grimmett
- Department of Pathology, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts
| | - Daniel DiToro
- Department of Pathology, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts
| | - Eva J Schaefer
- Department of Medical Oncology, Dana-Farber Cancer Institute, Harvard Medical School, Boston, Massachusetts
| | - R Coleman Lindsley
- Department of Medical Oncology, Dana-Farber Cancer Institute, Harvard Medical School, Boston, Massachusetts
| | - Thai Hoa Tran
- Division of Pediatric Hematology-Oncology, Centre Hospitalier Universitaire Sainte-Justine, Montreal, Quebec, Canada; Immune Diseases and Cancers Axis, Centre Hospitalier Universitaire Sainte-Justine, Montreal, Quebec, Canada
| | - Maxime Caron
- Immune Diseases and Cancers Axis, Centre Hospitalier Universitaire Sainte-Justine, Montreal, Quebec, Canada
| | - Sylvie Langlois
- Immune Diseases and Cancers Axis, Centre Hospitalier Universitaire Sainte-Justine, Montreal, Quebec, Canada
| | - Daniel Sinnett
- Division of Pediatric Hematology-Oncology, Centre Hospitalier Universitaire Sainte-Justine, Montreal, Quebec, Canada; Immune Diseases and Cancers Axis, Centre Hospitalier Universitaire Sainte-Justine, Montreal, Quebec, Canada
| | - Yana Pikman
- Department of Pediatric Oncology, Dana-Farber Cancer Institute, Harvard Medical School, Boston, Massachusetts; Division of Hematology/Oncology, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts
| | - Valentina Nardi
- Department of Pathology, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts
| | - Annette S Kim
- Department of Pathology, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts
| | - Lewis B Silverman
- Department of Pediatric Oncology, Dana-Farber Cancer Institute, Harvard Medical School, Boston, Massachusetts; Division of Hematology/Oncology, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts
| | - Marian H Harris
- Department of Pathology, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts.
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14
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Álvarez-Zúñiga CD, Garza-Veloz I, Martínez-Rendón J, Ureño-Segura M, Delgado-Enciso I, Martinez-Fierro ML. Circulating Biomarkers Associated with the Diagnosis and Prognosis of B-Cell Progenitor Acute Lymphoblastic Leukemia. Cancers (Basel) 2023; 15:4186. [PMID: 37627214 PMCID: PMC10453581 DOI: 10.3390/cancers15164186] [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: 07/20/2023] [Accepted: 08/18/2023] [Indexed: 08/27/2023] Open
Abstract
Acute lymphoblastic leukemia (ALL) is a hematological disease characterized by the dysfunction of the hematopoietic system that leads to arrest at a specific stage of stem cells development, suppressing the average production of cellular hematologic components. BCP-ALL is a neoplasm of the B-cell lineage progenitor. BCP-ALL is caused and perpetuated by several mechanisms that provide the disease with its tumor potential and genetic and cytological characteristics. These pathological features are used for diagnosis and the prognostication of BCP-ALL. However, most of these paraclinical tools can only be obtained by bone marrow aspiration, which, as it is an invasive study, can delay the diagnosis and follow-up of the disease, in addition to the anesthetic risk it entails for pediatric patients. For this reason, it is crucial to find noninvasive and accessible ways to supply information concerning diagnosis, prognosis, and the monitoring of the disease, such as circulating biomarkers. In oncology, a biomarker is any measurable indicator that demonstrates the presence of malignancy, tumoral behavior, prognosis, or responses to treatments. This review summarizes circulating molecules associated with BCP-ALL with potential diagnostic value, classificatory capacity during monitoring specific clinic features of the disease, and/or capacity to identify each BCP-ALL stage regarding its evolution and outcome of the patients with BCP-ALL. In the same way, we provide and classify biomarkers that may be used in further studies focused on clinical approaches or therapeutic target identification for BCP-ALL.
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Affiliation(s)
- Claudia Daniela Álvarez-Zúñiga
- Molecular Medicine Laboratory, Unidad Académica de Medicina Humana y C.S, Universidad Autónoma de Zacatecas, Zacatecas 98160, Mexico; (C.D.Á.-Z.); (I.G.-V.); (J.M.-R.)
| | - Idalia Garza-Veloz
- Molecular Medicine Laboratory, Unidad Académica de Medicina Humana y C.S, Universidad Autónoma de Zacatecas, Zacatecas 98160, Mexico; (C.D.Á.-Z.); (I.G.-V.); (J.M.-R.)
| | - Jacqueline Martínez-Rendón
- Molecular Medicine Laboratory, Unidad Académica de Medicina Humana y C.S, Universidad Autónoma de Zacatecas, Zacatecas 98160, Mexico; (C.D.Á.-Z.); (I.G.-V.); (J.M.-R.)
| | - Misael Ureño-Segura
- Hematology Service, Hospital General Zacatecas “Luz González Cosío”, Servicios de Salud de Zacatecas, Zacatecas 98160, Mexico;
| | - Iván Delgado-Enciso
- Cancerology State Institute, Colima State Health Services, Colima 28085, Mexico;
- School of Medicine, University of Colima, Colima 28040, Mexico
| | - Margarita L. Martinez-Fierro
- Molecular Medicine Laboratory, Unidad Académica de Medicina Humana y C.S, Universidad Autónoma de Zacatecas, Zacatecas 98160, Mexico; (C.D.Á.-Z.); (I.G.-V.); (J.M.-R.)
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15
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Noor S, Pritha AN, Pasmay AA, Sanchez JE, Sanchez JJ, Fernandez-Oropeza AK, Sun MS, Dell’Orco M, Davies S, Savage DD, Mellios N, Milligan ED. Prenatal alcohol exposure dysregulates spinal and circulating immune cell circular RNA expression in adult female rats with chronic sciatic neuropathy. Front Neurosci 2023; 17:1180308. [PMID: 37360167 PMCID: PMC10288115 DOI: 10.3389/fnins.2023.1180308] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2023] [Accepted: 05/09/2023] [Indexed: 06/28/2023] Open
Abstract
Alcohol consumption during pregnancy is associated with Fetal Alcohol Spectrum Disorders (FASD) that results in a continuum of central nervous system (CNS) deficits. Emerging evidence from both preclinical and clinical studies indicate that the biological vulnerability to chronic CNS disease in FASD populations is driven by aberrant neuroimmune actions. Our prior studies suggest that, following minor nerve injury, prenatal alcohol exposure (PAE) is a risk factor for developing adult-onset chronic pathological touch sensitivity or allodynia. Allodynia in PAE rats occurs concurrently with heightened proinflammatory peripheral and spinal glial-immune activation. However, minor nerve-injured control rats remain non-allodynic, and corresponding proinflammatory factors are unaltered. A comprehensive molecular understanding of the mechanism(s) that underlie PAE-induced proinflammatory bias during adulthood remains elusive. Non-coding circular RNAs (circRNAs) are emerging as novel modulators of gene expression. Here, we hypothesized that PAE induces dysregulation of circRNAs that are linked to immune function under basal and nerve-injured conditions during adulthood. Utilizing a microarray platform, we carried out the first systematic profiling of circRNAs in adult PAE rats, prior to and after minor nerve injury. The results demonstrate a unique circRNA profile in adult PAE rats without injury; 18 circRNAs in blood and 32 spinal circRNAs were differentially regulated. Following minor nerve injury, more than 100 differentially regulated spinal circRNAs were observed in allodynic PAE rats. Bioinformatic analysis identified that the parental genes of these circRNAs are linked to the NF-κB complex, a central transcription factor for pain-relevant proinflammatory cytokines. Quantitative real-time PCR was employed to measure levels of selected circRNAs and linear mRNA isoforms. We have validated that circVopp1 was significantly downregulated in blood leukocytes in PAE rats, concurrent with downregulation of Vopp1 mRNA levels. Spinal circVopp1 levels were upregulated in PAE rats, regardless of nerve injury. Additionally, PAE downregulated levels of circItch and circRps6ka3, which are linked to immune regulation. These results demonstrate that PAE exerts long-lasting dysregulation of circRNA expression in blood leukocytes and the spinal cord. Moreover, the spinal circRNA expression profile following peripheral nerve injury is differentially modulated by PAE, potentially contributing to PAE-induced neuroimmune dysregulation.
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16
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Studies on the role of non-coding RNAs in controlling the activity of T cells in asthma. Noncoding RNA Res 2023; 8:211-217. [PMID: 36865391 PMCID: PMC9972402 DOI: 10.1016/j.ncrna.2023.02.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2023] [Revised: 02/13/2023] [Accepted: 02/13/2023] [Indexed: 02/17/2023] Open
Abstract
Bronchial asthma, commonly known as asthma, is a chronic inflammatory disease characterized by airway inflammation, increased responsiveness and changes in airway structure. T cells, particularly T helper cells, play a crucial role in the disease. Non-coding RNAs, which are RNAs that do not code for proteins, mainly include microRNAs, long non-coding RNAs, and circular RNAs, play a role in regulating various biological processes. Studies have shown that non-coding RNAs have an important role in the activation and transformation of T cells and other biological processes in asthma. The specific mechanisms and clinical applications are worth further examination. This article reviews the recent research on the role of microRNAs, long non-coding RNAs and circular RNAs in T cells in asthma.
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17
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Buratin A, Borin C, Tretti Parenzan C, Dal Molin A, Orsi S, Binatti A, Simon K, Paganin M, Serafin V, Gaffo E, te Kronnie G, Van Vlierberghe P, Bresolin S, Bortoluzzi S. CircFBXW7 in patients with T-cell ALL: depletion sustains MYC and NOTCH activation and leukemia cell viability. Exp Hematol Oncol 2023; 12:12. [PMID: 36681829 PMCID: PMC9863195 DOI: 10.1186/s40164-023-00374-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2022] [Accepted: 01/10/2023] [Indexed: 01/23/2023] Open
Abstract
Circular RNAs (circRNAs) are emerging as new players in leukemogenic mechanisms. In patients with T-cell Acute Lymphoblastic Leukemia (T-ALL), the recent report of a remarkable dysregulation of circRNAs incited further functional investigation. Here we focus on circFBXW7, highly expressed in T-cells, with a notably high abundance of the circular compared to linear transcript of FBXW7. Two T-ALL patient cohorts profiled with RNA-seq were analyzed in comparison with five populations of developing thymocytes as normal counterpart, quantifying circRNA and gene expression. CircFBXW7 expression was very heterogeneous in T-ALL patients allowing their stratification in two groups with low and high expression of this circRNA, not correlated with FBXW7 mutation status and T-ALL molecular subgroups. With a loss-of-function study in T-ALL in vitro, we demonstrate that circFBXW7 depletion increases leukemic cell viability and proliferation. Microarray profiling highlighted the effect of the circFBXW7 silencing on gene expression, with activation of pro-proliferative pathways, supporting a tumor suppressor role of circFBXW7 in T-ALL. Further, MYC and intracellular NOTCH1 protein levels, as well as expression of MYC target and NOTCH signaling genes were elevated after circFBXW7 depletion, suggesting an inhibitory role of circFBXW7 in these oncogenic axes. Plus, low circFBXW7 levels were associated with a particular gene expression profile in T-ALL patients, which was remarkably mirrored by the effects of circFBXW7 loss-of-function in vitro. CircFBXW7 depletion notably emerges as a new factor enhancing a proliferative phenotype and the activation of the MYC signaling pathway, key players in this aggressive malignancy.
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Affiliation(s)
- Alessia Buratin
- grid.5608.b0000 0004 1757 3470Department of Molecular Medicine, University of Padova, Padua, Italy ,grid.5608.b0000 0004 1757 3470Department of Biology, University of Padova, Padua, Italy
| | - Cristina Borin
- grid.5608.b0000 0004 1757 3470Department of Molecular Medicine, University of Padova, Padua, Italy ,grid.5608.b0000 0004 1757 3470Department of Maternal and Child Health, University of Padova, Padua, Italy
| | - Caterina Tretti Parenzan
- grid.5608.b0000 0004 1757 3470Department of Maternal and Child Health, University of Padova, Padua, Italy
| | - Anna Dal Molin
- grid.5608.b0000 0004 1757 3470Department of Molecular Medicine, University of Padova, Padua, Italy
| | - Silvia Orsi
- grid.5608.b0000 0004 1757 3470Department of Molecular Medicine, University of Padova, Padua, Italy ,grid.5608.b0000 0004 1757 3470Department of Biology, University of Padova, Padua, Italy
| | - Andrea Binatti
- grid.5608.b0000 0004 1757 3470Department of Molecular Medicine, University of Padova, Padua, Italy
| | - Katharina Simon
- grid.5608.b0000 0004 1757 3470Department of Maternal and Child Health, University of Padova, Padua, Italy
| | - Maddalena Paganin
- grid.5608.b0000 0004 1757 3470Department of Molecular Medicine, University of Padova, Padua, Italy ,Onco-Hematology, Stem Cell Transplant and Gene Therapy Laboratory, IRP-Istituto Di Ricerca Pediatrica, Padua, Italy
| | - Valentina Serafin
- grid.5608.b0000 0004 1757 3470Department of Surgical, Oncological and Gastroenterological Sciences, University of Padova, Padua, Italy ,Onco-Hematology, Stem Cell Transplant and Gene Therapy Laboratory, IRP-Istituto Di Ricerca Pediatrica, Padua, Italy
| | - Enrico Gaffo
- grid.5608.b0000 0004 1757 3470Department of Molecular Medicine, University of Padova, Padua, Italy
| | - Geertruij te Kronnie
- grid.5608.b0000 0004 1757 3470Department of Molecular Medicine, University of Padova, Padua, Italy
| | - Pieter Van Vlierberghe
- grid.510942.bCancer Research Institute Ghent (CRIG), Ghent, Belgium ,grid.5342.00000 0001 2069 7798Department of Biomolecular Medicine, Ghent University, Ghent, Belgium
| | - Silvia Bresolin
- grid.5608.b0000 0004 1757 3470Department of Maternal and Child Health, University of Padova, Padua, Italy ,Onco-Hematology, Stem Cell Transplant and Gene Therapy Laboratory, IRP-Istituto Di Ricerca Pediatrica, Padua, Italy
| | - Stefania Bortoluzzi
- grid.5608.b0000 0004 1757 3470Department of Molecular Medicine, University of Padova, Padua, Italy ,grid.5608.b0000 0004 1757 3470Interdepartmental Research Center for Innovative Biotechnologies (CRIBI), University of Padova, Padua, Italy
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18
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Deng W, Chao R, Zhu S. Emerging roles of circRNAs in leukemia and the clinical prospects: An update. Immun Inflamm Dis 2023; 11:e725. [PMID: 36705414 PMCID: PMC9801069 DOI: 10.1002/iid3.725] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2022] [Revised: 09/29/2022] [Accepted: 10/04/2022] [Indexed: 01/01/2023] Open
Abstract
BACKGROUND Circular RNAs (circRNAs) are a new category of endogenous non-protein coding RNAs (ncRNAs), and show the characteristics of high conservation, stability, and tissue specificity. Due to rapid advances in next-generation sequencing and transcriptome profiling technologies, circRNAs have been widely discovered in many organisms and participated in the development and progress of a variety of diseases. As a type of molecular sponge, circRNAs mainly absorb micro RNAs competitively and interplay with RNA-binding proteins to modulate the splicing as well as transcription of target genes. METHODS This review is based on a literature search using the Medline database. Search terms used were "circular RNAs and leukemia," "circRNAs and leukemia," "circRNAs and acute lymphoblastic leukemia," "circRNAs and chronic lymphoblastic leukemia," "circRNAs and acute myeloid leukemia," "circRNAs and chronic myeloid leukemia," and "circRNAs, biomarker, and hematological system." RESULTS CircRNAs have been proven as potential biomarkers and therapeutic targets in a variety of tumors. Recent research has found that circRNAs aberrantly exist in hematological cancers, especially leukemia, and are significantly associated with the incidence, progress, and metastasis of diseases as well as the prognosis of patients. CONCLUSION The current work summarizes the latest findings on circRNAs in various types of leukemia, aiming to propose prospective therapies and new drug screening methods for the treatment of leukemia.
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Affiliation(s)
- Wei Deng
- Department of Pediatric General Internal MedicineGansu Provincial Maternity and Child‐Care HospitalLanzhou CityGansu ProvincePeople's Republic of China
| | - Rong Chao
- Department of Pediatric General Internal MedicineGansu Provincial Maternity and Child‐Care HospitalLanzhou CityGansu ProvincePeople's Republic of China
| | - Shengdong Zhu
- Department of Pediatric General Internal MedicineGansu Provincial Maternity and Child‐Care HospitalLanzhou CityGansu ProvincePeople's Republic of China
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19
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Dal Molin A, Tretti Parenzan C, Gaffo E, Borin C, Boldrin E, Meyer LH, te Kronnie G, Bresolin S, Bortoluzzi S. Discovery of fusion circular RNAs in leukemia with KMT2A::AFF1 rearrangements by the new software CircFusion. Brief Bioinform 2022; 24:6965906. [PMID: 36585787 PMCID: PMC9851293 DOI: 10.1093/bib/bbac589] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2022] [Revised: 11/12/2022] [Accepted: 12/02/2022] [Indexed: 01/01/2023] Open
Abstract
Chromosomal translocations in cancer genomes, key players in many types of cancers, generate chimeric proteins that drive oncogenesis. Genomes with chromosomal rearrangements can also produce fusion circular RNAs (f-circRNAs) by backsplicing of chimeric transcripts, as first shown in leukemias with PML::RARα and KMT2A::MLLT3 translocations and later in solid cancers. F-circRNAs contribute to the oncogenic processes and reinforce the oncogenic activity of chimeric proteins. In leukemia with KMT2A::AFF1 (MLL::AF4) fusions, we previously reported specific alterations of circRNA expression, but nothing was known about f-circRNAs. Due to the presence of two chimeric sequences, fusion and backsplice junctions, the identification of f-circRNAs with available tools is challenging, possibly resulting in the underestimation of this RNA species, especially when the breakpoint is not known. We developed CircFusion, a new software tool to detect linear fusion transcripts and f-circRNAs from RNA-seq data, both in samples for which the breakpoints are known and when the information about the joined exons is missing. CircFusion can detect linear and circular chimeric transcripts deriving from the main and reciprocal translocations also in the presence of multiple breakpoints, which are common in malignant cells. Benchmarking tests on simulated and real datasets of cancer samples with previously experimentally determined f-circRNAs showed that CircFusion provides reliable predictions and outperforms available methods for f-circRNA detection. We discovered and validated novel f-circRNAs in acute leukemia harboring KMT2A::AFF1 rearrangements, leading the way to future functional studies aimed to unveil their role in this malignancy.
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Affiliation(s)
- Anna Dal Molin
- Corresponding authors: Anna Dal Molin, Department of Molecular Medicine, University of Padova, Via G. Colombo, 3 - 35131, Padova, Italy. Tel.: +39 049 827 6502; Fax: +39 049 827 6209. ; Stefania Bortoluzzi, Associate Professor of Applied Biology.Department of Molecular Medicine, University of Padova, Via G. Colombo, 3 - 35131, Padova, Italy. Tel.: +39 049 827 6502; Fax: +39 049 827 6209.
| | | | - Enrico Gaffo
- Department of Molecular Medicine, University of Padova, Padova, Italy
| | - Cristina Borin
- Department of Molecular Medicine, University of Padova, Padova, Italy,Onco-Hematology, Stem Cell Transplant and Gene Therapy Laboratory, IRP-Istituto di Ricerca Pediatrica, Padova, Italy
| | - Elena Boldrin
- Department of Pediatrics and Adolescent Medicine, Ulm University Medical Center, Ulm, Germany,Department of Molecular Medicine, University of Padova, Padova, Italy,Department of Biology, University of Padova, Padova, Italy
| | - Lueder H Meyer
- Department of Pediatrics and Adolescent Medicine, Ulm University Medical Center, Ulm, Germany
| | | | | | - Stefania Bortoluzzi
- Corresponding authors: Anna Dal Molin, Department of Molecular Medicine, University of Padova, Via G. Colombo, 3 - 35131, Padova, Italy. Tel.: +39 049 827 6502; Fax: +39 049 827 6209. ; Stefania Bortoluzzi, Associate Professor of Applied Biology.Department of Molecular Medicine, University of Padova, Via G. Colombo, 3 - 35131, Padova, Italy. Tel.: +39 049 827 6502; Fax: +39 049 827 6209.
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20
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Galardi A, Colletti M, Palma A, Di Giannatale A. An Update on Circular RNA in Pediatric Cancers. Biomedicines 2022; 11:biomedicines11010036. [PMID: 36672544 PMCID: PMC9856195 DOI: 10.3390/biomedicines11010036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2022] [Revised: 12/15/2022] [Accepted: 12/20/2022] [Indexed: 12/28/2022] Open
Abstract
Circular RNAs (circRNAs) are a class of single-stranded closed noncoding RNA molecules which are formed as a result of reverse splicing of mRNAs. Despite their relative abundance, only recently there appeared an increased interest in the understanding of their regulatory importance. Among their most relevant characteristics are high stability, abundance and evolutionary conservation among species. CircRNAs are implicated in several cellular functions, ranging from miRNA and protein sponges to transcriptional modulation and splicing. Additionally, circRNAs' aberrant expression in pathological conditions is bringing to light their possible use as diagnostic and prognostic biomarkers. Their use as indicator molecules of pathological changes is also supported by their peculiar covalent closed cyclic structure which bestows resistance to RNases. Their regulatory role in cancer pathogenesis and metastasis is supported by studies involving human tumors that have investigated different expression profiles of these molecules. As endogenous competitive RNA, circRNAs can regulate tumor proliferation and invasion and they arouse great consideration as potential therapeutic biomarkers and targets for cancer. In this review, we describe the most recent findings on circRNAs in the most common pediatric solid cancers (such as brain tumors, neuroblastomas, and sarcomas) and in more rare ones (such as Wilms tumors, hepatoblastomas, and retinoblastomas).
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Affiliation(s)
- Angela Galardi
- Department of Pediatric Hemato-Oncology and Cell and Gene Therapy, IRCCS, Bambino Gesù Children’s Hospital, Viale San Paolo 15, 00146 Rome, Italy
| | - Marta Colletti
- Department of Pediatric Hemato-Oncology and Cell and Gene Therapy, IRCCS, Bambino Gesù Children’s Hospital, Viale San Paolo 15, 00146 Rome, Italy
| | - Alessandro Palma
- Translational Cytogenomics Research Unit, IRCCS, Bambino Gesù Children’s Hospital, Viale San Paolo 15, 00146 Rome, Italy
| | - Angela Di Giannatale
- Department of Pediatric Hemato-Oncology and Cell and Gene Therapy, IRCCS, Bambino Gesù Children’s Hospital, Viale San Paolo 15, 00146 Rome, Italy
- Correspondence:
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21
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Li Q, Wang L, Xing K, Yang Y, Abiola Adetula A, Liu Y, Yi G, Zhang H, Sweeney T, Tang Z. Identification of circRNAs Associated with Adipogenesis Based on RNA-seq Data in Pigs. Genes (Basel) 2022; 13:2062. [PMID: 36360299 PMCID: PMC9689998 DOI: 10.3390/genes13112062] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2022] [Revised: 10/25/2022] [Accepted: 10/25/2022] [Indexed: 04/10/2024] Open
Abstract
Adipocytes or fat cells play a vital role in the storage and release of energy in pigs, and many circular RNAs (circRNAs) have emerged as important regulators in various tissues and cell types in pigs. However, the spatio-temporal expression pattern of circRNAs between different adipose deposition breeds remains elusive. In this study, RNA sequencing (RNA-seq) produced transcriptome profiles of Western Landrace (lean-type) and Chinese Songliao black pigs (obese-type) with different thicknesses of subcutaneous fat tissues and were used to identify circRNAs involved in the regulation of adipogenesis. Gene expression analysis revealed 883 circRNAs, among which 26 and 11 circRNAs were differentially expressed between Landrace vs. Songliao pigs and high- vs. low-thickness groups, respectively. We also analyzed the interaction between circRNAs and microRNAs (miRNAs) and constructed their interaction network in adipogenesis; gene ontology classification and pathway analysis revealed two vital circRNAs, with the majority of their target genes enriched in biological functions such as fatty acids biosynthesis, fatty acid metabolism, and Wnt/TGF-β signaling pathways. These candidate circRNAs can be taken as potential targets for further experimental studies. Our results show that circRNAs are dynamically expressed and provide a valuable basis for understanding the molecular mechanism of circRNAs in pig adipose biology.
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Affiliation(s)
- Qiaowei Li
- Kunpeng Institute of Modern Agriculture at Foshan, Foshan 528200, China
- Shenzhen Branch, Guangdong Laboratory for Lingnan Modern Agriculture, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen 518124, China
- School of Veterinary Medicine, University College Dublin, Belfield, D04 V1W8 Dublin, Ireland
- Key Laboratory of Livestock and Poultry Multi-Omics of MARA, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen 518124, China
- Innovation Group of Pig Genome Design and Breeding, Research Center for Animal Genome, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen 518124, China
| | - Liyuan Wang
- Shenzhen Branch, Guangdong Laboratory for Lingnan Modern Agriculture, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen 518124, China
- Key Laboratory of Livestock and Poultry Multi-Omics of MARA, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen 518124, China
- Innovation Group of Pig Genome Design and Breeding, Research Center for Animal Genome, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen 518124, China
- Research Centre of Animal Nutritional Genomics, State Key Laboratory of Animal Nutrition, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen 518124, China
| | - Kai Xing
- Animal Science and Technology College, Beijing University of Agriculture, Beijing 102206, China
| | - Yalan Yang
- Kunpeng Institute of Modern Agriculture at Foshan, Foshan 528200, China
- Shenzhen Branch, Guangdong Laboratory for Lingnan Modern Agriculture, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen 518124, China
- Key Laboratory of Livestock and Poultry Multi-Omics of MARA, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen 518124, China
- Innovation Group of Pig Genome Design and Breeding, Research Center for Animal Genome, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen 518124, China
| | - Adeyinka Abiola Adetula
- Shenzhen Branch, Guangdong Laboratory for Lingnan Modern Agriculture, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen 518124, China
- Key Laboratory of Livestock and Poultry Multi-Omics of MARA, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen 518124, China
- Innovation Group of Pig Genome Design and Breeding, Research Center for Animal Genome, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen 518124, China
| | - Yuwen Liu
- Shenzhen Branch, Guangdong Laboratory for Lingnan Modern Agriculture, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen 518124, China
- Key Laboratory of Livestock and Poultry Multi-Omics of MARA, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen 518124, China
- Innovation Group of Pig Genome Design and Breeding, Research Center for Animal Genome, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen 518124, China
| | - Guoqiang Yi
- Shenzhen Branch, Guangdong Laboratory for Lingnan Modern Agriculture, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen 518124, China
- Key Laboratory of Livestock and Poultry Multi-Omics of MARA, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen 518124, China
- Innovation Group of Pig Genome Design and Breeding, Research Center for Animal Genome, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen 518124, China
| | - Hongfu Zhang
- Research Centre of Animal Nutritional Genomics, State Key Laboratory of Animal Nutrition, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen 518124, China
| | - Torres Sweeney
- School of Veterinary Medicine, University College Dublin, Belfield, D04 V1W8 Dublin, Ireland
| | - Zhonglin Tang
- Kunpeng Institute of Modern Agriculture at Foshan, Foshan 528200, China
- Shenzhen Branch, Guangdong Laboratory for Lingnan Modern Agriculture, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen 518124, China
- Key Laboratory of Livestock and Poultry Multi-Omics of MARA, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen 518124, China
- Innovation Group of Pig Genome Design and Breeding, Research Center for Animal Genome, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen 518124, China
- Research Centre of Animal Nutritional Genomics, State Key Laboratory of Animal Nutrition, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen 518124, China
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22
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The Diagnostic and Therapeutic Role of Circular RNA HIPK3 in Human Diseases. Diagnostics (Basel) 2022; 12:diagnostics12102469. [PMID: 36292157 PMCID: PMC9601126 DOI: 10.3390/diagnostics12102469] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2022] [Revised: 10/05/2022] [Accepted: 10/09/2022] [Indexed: 11/17/2022] Open
Abstract
Circular RNAs (circRNAs) are a class of noncoding RNAs with closed-loop of single-stranded RNA structure. Although most of the circRNAs do not directly encode proteins, emerging evidence suggests that circRNAs play a pivotal and complex role in multiple biological processes by regulating gene expression. As one of the most popular circRNAs, circular homeodomain-interacting protein kinase 3 (circHIPK3) has frequently gained the interest of researchers in recent years. Accumulating studies have demonstrated the significant impacts on the occurrence and development of multiple human diseases including cancers, cardiovascular diseases, diabetes mellitus, inflammatory diseases, and others. The present review aims to provide a detailed description of the functions of circHIPK3 and comprehensively overview the diagnostic and therapeutic value of circHIPK3 in these certain diseases.
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23
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Li R, Wang X, Zhu C, Wang K. lncRNA PVT1: a novel oncogene in multiple cancers. Cell Mol Biol Lett 2022; 27:84. [PMID: 36195846 PMCID: PMC9533616 DOI: 10.1186/s11658-022-00385-x] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2022] [Accepted: 09/07/2022] [Indexed: 12/01/2022] Open
Abstract
Long noncoding RNAs are involved in epigenetic gene modification, including binding to the chromatin rearrangement complex in pre-transcriptional regulation and to gene promoters in gene expression regulation, as well as acting as microRNA sponges to control messenger RNA levels in post-transcriptional regulation. An increasing number of studies have found that long noncoding RNA plasmacytoma variant translocation 1 (PVT1) plays an important role in cancer development. In this review of a large number of studies on PVT1, we found that PVT1 is closely related to tumor onset, proliferation, invasion, epithelial–mesenchymal transformation, and apoptosis, as well as poor prognosis and radiotherapy and chemotherapy resistance in some cancers. This review comprehensively describes PVT1 expression in various cancers and presents novel approaches to the diagnosis and treatment of cancer.
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Affiliation(s)
- Ruiming Li
- Department of Urology, Shengjing Hospital of China Medical University, #36 Sanhao Street, Heping District, Shenyang, 110004, Liaoning, China
| | - Xia Wang
- Department of Urology, Shengjing Hospital of China Medical University, #36 Sanhao Street, Heping District, Shenyang, 110004, Liaoning, China
| | - Chunming Zhu
- Department of Family Medicine, Shengjing Hospital of China Medical University, #36 Sanhao Street, Heping District, Shenyang, 110004, Liaoning, China.
| | - Kefeng Wang
- Department of Urology, Shengjing Hospital of China Medical University, #36 Sanhao Street, Heping District, Shenyang, 110004, Liaoning, China.
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24
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The Pleiotropy of PAX5 Gene Products and Function. Int J Mol Sci 2022; 23:ijms231710095. [PMID: 36077495 PMCID: PMC9456430 DOI: 10.3390/ijms231710095] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2022] [Revised: 08/23/2022] [Accepted: 08/26/2022] [Indexed: 11/17/2022] Open
Abstract
PAX5, a member of the Paired Box (PAX) transcription factor family, is an essential factor for B-lineage identity during lymphoid differentiation. Mechanistically, PAX5 controls gene expression profiles, which are pivotal to cellular processes such as viability, proliferation, and differentiation. Given its crucial function in B-cell development, PAX5 aberrant expression also correlates with hallmark cancer processes leading to hematological and other types of cancer lesions. Despite the well-established association of PAX5 in the development, maintenance, and progression of cancer disease, the use of PAX5 as a cancer biomarker or therapeutic target has yet to be implemented. This may be partly due to the assortment of PAX5 expressed products, which layers the complexity of their function and role in various regulatory networks and biological processes. In this review, we provide an overview of the reported data describing PAX5 products, their regulation, and function in cellular processes, cellular biology, and neoplasm.
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25
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Luo C, Li JJ, Wen F, Cao YX, Luo ZY, Long XX. CircFBXW7 inhibits the tumorigenesis of T-cell acute lymphoblastic leukemia through modulating miR-494-3p/SOX1 axis. Cell Death Dis 2022; 8:256. [PMID: 35538053 PMCID: PMC9091256 DOI: 10.1038/s41420-022-00857-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2021] [Revised: 12/20/2021] [Accepted: 01/13/2022] [Indexed: 11/09/2022]
Abstract
T-cell acute lymphoblastic leukemia (T-ALL) is a type of leukemia with high malignant behaviors, which seriously threatens the health of people. It has been reported that circFBXW7 is downregulated in lymphoblastic leukemia. Nevertheless, the exact role of circFBXW7 in T-ALL remains elusive. MTT assay was used to assess the cell viability. Cell apoptosis was assessed by flow cytometry. In addition, mRNA expressions were assessed by RT-qPCR, and a western blot was applied to investigate the protein levels. Meanwhile, the correlation among circFBXW7, miR-494-3p, and SOX1 was explored by RNA pull-down and dual-luciferase reporter assays. Furthermore, a xenograft mice model was conducted to verify the function of circFBXW7 in T-ALL in vivo. CircFBXW7 was significantly downregulated in T-ALL, of which overexpression inhibited the cell viability and induced the apoptosis of Jurkat cells. Moreover, miR-494-3p was identified to be a functional downstream effector to be involved in circFBXW7-mediated T-ALL cell proliferation. Besides, SOX1 was a direct target of miR-494-3p, and the impact of miR-494-3p mimics on T-ALL cell growth was inhibited in the presence of SOX1 overexpression. Furthermore, overexpression of circFBXW7 dramatically inhibited T-ALL tumor growth. In summary, circFBXW7 attenuated the tumorigenesis of T-ALL through the mediation of the miR-494-3p/SOX1 axis, which might be novel targets for T-ALL treatment.
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Affiliation(s)
- Cong Luo
- Department of Hematology, the First Affiliated Hospital, Hengyang Medical school, University of South China, Hengyang421001, Hengyang, Hunan Province, China
| | - Jun-Jun Li
- Department of Hematology, the First Affiliated Hospital, Hengyang Medical school, University of South China, Hengyang421001, Hengyang, Hunan Province, China
| | - Feng Wen
- Department of Hematology, the First Affiliated Hospital, Hengyang Medical school, University of South China, Hengyang421001, Hengyang, Hunan Province, China
| | - Yi-Xiong Cao
- Department of Hematology, the First Affiliated Hospital, Hengyang Medical school, University of South China, Hengyang421001, Hengyang, Hunan Province, China
| | - Ze-Yu Luo
- Department of Hematology, the First Affiliated Hospital, Hengyang Medical school, University of South China, Hengyang421001, Hengyang, Hunan Province, China
| | - Xing-Xing Long
- Department of Hematology, the First Affiliated Hospital, Hengyang Medical school, University of South China, Hengyang421001, Hengyang, Hunan Province, China.
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Yang X, Tao L, Xu Y, Li S, Yang W, Wang L, Zhu J. CircMYC promotes proliferation, migration, invasion and inhibits apoptosis of small cell lung cancer by targeting miR-145/ Matrix Metallopeptidase 2 axis. Bioengineered 2022; 13:10552-10563. [PMID: 35441564 PMCID: PMC9161861 DOI: 10.1080/21655979.2022.2062978] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022] Open
Abstract
Circular RNAs (circRNAs) are involved in the carcinogenesis of lung cancer. Human MYC gene is highly expressed in melanoma, multiple myeloma, and nasopharyngeal carcinoma. We aimed to investigate the role of circMYC in small cell lung cancer (SCLC). The expression of cirMYC in SCLC tissues and cells were examined. Functional studies were performed to evaluate the roles of circMYC in SCLC cells. Luciferase reporter gene assay, RNA pull-down assay, and rescue experiments were performed to evaluate the regulatory relationship between circMYC and miR-145, and MiR-145 and MMP2 mRNA. We found that CirMYC was highly expressed in SCLC tissues and cells. Knockdown of circMYC could inhibit cell proliferation, migration, invasion, and induce apoptosis. CircMYC targeted miR-145 and miR-145 targeted MMP2 (Matrix Metallopeptidase 2) mRNA. Our data indicated that circMYC upregulates the expression of MMP-2 by inhibiting miR-145, which functions to promote the proliferation, migration, and invasion and inhibit the apoptosis of SCLC. These findings suggest that targeting circMYC/miR-145/MMP-2 could serve as a potential therapeutic strategy for SCLC treatment.
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Affiliation(s)
- Xi Yang
- Department of Respiratory and Critical Care Medicine, Taizhou Central Hospital (Taizhou University Hospital), Zhejiang Province, China
| | - Lianqin Tao
- Department of Respiratory and Critical Care Medicine, Taizhou Central Hospital (Taizhou University Hospital), Zhejiang Province, China
| | - Yani Xu
- Department of Respiratory and Critical Care Medicine, Taizhou Central Hospital (Taizhou University Hospital), Zhejiang Province, China
| | - Sujian Li
- Department of Respiratory and Critical Care Medicine, Taizhou Central Hospital (Taizhou University Hospital), Zhejiang Province, China
| | - Weiwei Yang
- Department of Respiratory and Critical Care Medicine, Taizhou Central Hospital (Taizhou University Hospital), Zhejiang Province, China
| | - Lijuan Wang
- Department of Respiratory and Critical Care Medicine, Taizhou Central Hospital (Taizhou University Hospital), Zhejiang Province, China
| | - Junfei Zhu
- Department of Respiratory and Critical Care Medicine, Taizhou Central Hospital (Taizhou University Hospital), Zhejiang Province, China
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Maimaitiyiming Y, Ye L, Yang T, Yu W, Naranmandura H. Linear and Circular Long Non-Coding RNAs in Acute Lymphoblastic Leukemia: From Pathogenesis to Classification and Treatment. Int J Mol Sci 2022; 23:ijms23084442. [PMID: 35457264 PMCID: PMC9033105 DOI: 10.3390/ijms23084442] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2022] [Revised: 04/13/2022] [Accepted: 04/15/2022] [Indexed: 02/07/2023] Open
Abstract
The coding regions account for only a small part of the human genome, and the remaining vast majority of the regions generate large amounts of non-coding RNAs. Although non-coding RNAs do not code for any protein, they are suggested to work as either tumor suppressers or oncogenes through modulating the expression of genes and functions of proteins at transcriptional, posttranscriptional and post-translational levels. Acute Lymphoblastic Leukemia (ALL) originates from malignant transformed B/T-precursor-stage lymphoid progenitors in the bone marrow (BM). The pathogenesis of ALL is closely associated with aberrant genetic alterations that block lymphoid differentiation and drive abnormal cell proliferation as well as survival. While treatment of pediatric ALL represents a major success story in chemotherapy-based elimination of a malignancy, adult ALL remains a devastating disease with relatively poor prognosis. Thus, novel aspects in the pathogenesis and progression of ALL, especially in the adult population, need to be further explored. Accumulating evidence indicated that genetic changes alone are rarely sufficient for development of ALL. Recent advances in cytogenic and sequencing technologies revealed epigenetic alterations including that of non-coding RNAs as cooperating events in ALL etiology and progression. While the role of micro RNAs in ALL has been extensively reviewed, less attention, relatively, has been paid to other non-coding RNAs. Herein, we review the involvement of linear and circular long non-coding RNAs in the etiology, maintenance, and progression of ALL, highlighting the contribution of these non-coding RNAs in ALL classification and diagnosis, risk stratification as well as treatment.
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Affiliation(s)
- Yasen Maimaitiyiming
- The Affiliated Sir Run Run Shaw Hospital, and Department of Public Health, Zhejiang University School of Medicine, Hangzhou 310058, China; (Y.M.); (L.Y.); (T.Y.)
- Cancer Center, Zhejiang University, Hangzhou 310058, China
- NHC and CAMS Key Laboratory of Medical Neurobiology, School of Brain Science and Brain Medicine, Zhejiang University, Hangzhou 310058, China
| | - Linyan Ye
- The Affiliated Sir Run Run Shaw Hospital, and Department of Public Health, Zhejiang University School of Medicine, Hangzhou 310058, China; (Y.M.); (L.Y.); (T.Y.)
- Cancer Center, Zhejiang University, Hangzhou 310058, China
| | - Tao Yang
- The Affiliated Sir Run Run Shaw Hospital, and Department of Public Health, Zhejiang University School of Medicine, Hangzhou 310058, China; (Y.M.); (L.Y.); (T.Y.)
- Cancer Center, Zhejiang University, Hangzhou 310058, China
| | - Wenjuan Yu
- Department of Hematology, First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310058, China
- Correspondence: (W.Y.); (H.N.)
| | - Hua Naranmandura
- The Affiliated Sir Run Run Shaw Hospital, and Department of Public Health, Zhejiang University School of Medicine, Hangzhou 310058, China; (Y.M.); (L.Y.); (T.Y.)
- Cancer Center, Zhejiang University, Hangzhou 310058, China
- Department of Hematology, First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310058, China
- Liangzhu Laboratory, Zhejiang University Medical Center, Hangzhou 311121, China
- Correspondence: (W.Y.); (H.N.)
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Patterns of Differentially Expressed circRNAs in Human Thymocytes. Noncoding RNA 2022; 8:ncrna8020026. [PMID: 35447889 PMCID: PMC9030292 DOI: 10.3390/ncrna8020026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2022] [Revised: 03/24/2022] [Accepted: 03/29/2022] [Indexed: 12/05/2022] Open
Abstract
Circular RNAs (circRNAs) are suggested to play a discriminative role between some stages of thymocyte differentiation. However, differential aspects of the stage of mature single-positive thymocytes remain to be explored. The purpose of this study is to investigate the differential expression pattern of circRNAs in three different development stages of human thymocytes, including mature single-positive cells, and perform predictions in silico regarding the ability of specific circRNAs when controlling the expression of genes involved in thymocyte differentiation. We isolate human thymocytes at three different stages of intrathymic differentiation and determine the expression of circRNAs and mRNA by RNASeq. We show that the differential expression pattern of 50 specific circRNAs serves to discriminate between the three human thymocyte populations. Interestingly, the downregulation of RAG2, a gene involved in T-cell differentiation in the thymus, could be simultaneously controlled by the downregulation of two circRNASs (hsa_circ_0031584 and hsa_circ_0019079) through the hypothetical liberation of hsa-miR-609. Our study provides, for the first time, significant insights into the usefulness of circRNAs in discriminating between different stages of thymocyte differentiation and provides new potential circRNA–miRNA–mRNA networks capable of controlling the expression of genes involved in T-cell differentiation in the thymus.
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29
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circNBPF10/miR-224 Axis Regulates PBX3 to Promote the Malignant Progression of Lung Cancer. JOURNAL OF ONCOLOGY 2022; 2022:2832920. [PMID: 35342419 PMCID: PMC8947861 DOI: 10.1155/2022/2832920] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/10/2021] [Revised: 10/07/2021] [Accepted: 10/09/2021] [Indexed: 12/24/2022]
Abstract
This study aims to reveal the potential effect of circNBPF10 on the malignant progression of lung cancer. The expression levels of circNBPF10 in lung cancer tissues and cell lines were detected via real-time quantitative PCR (RT-qPCR). The relationship between circNBPF10 expression and lung cancer metastasis was further analyzed. Effects on lung cancer cells after the knockout or overexpression of circNBPF10 were detected. Subsequently, the regulatory relationship of circNBPF10 with miR-224 was detected by using the dual-luciferase reporter gene. In addition, the role of pre-B-cell homeo box 3 (PBX3) in the progression of lung cancer affected by circNBPF10 was evaluated through a rescue experiment. circNBPF10 was highly expressed in lung cancer tissues and lung cancer cell lines. The expression level of circNBPF10 was significantly higher in patients with lung cancer and lymphatic metastasis or distant metastasis than in patients with nonmetastatic lung cancer. The downregulation of circNBPF10 reduced the proliferation, migration, and invasion of lung cancer cells. In lung cancer cells, circNBPF10 negatively regulated the expression of miR-224, whereas miR-224 directly targeted the expression of PBX3. The results of the rescue experiment confirmed that PBX3 was the key gene for the promoting effect of circNBPF10 on the malignant progression of lung cancer. circNBPF10 was highly expressed in lung cancer tissues and was associated with distant metastasis and poor prognosis in patients with lung cancer. circNBPF10 upregulated PBX3 by targeting miR-224 and promoted the malignant progression of lung cancer.
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Olmedo-Suárez MÁ, Ramírez-Díaz I, Pérez-González A, Molina-Herrera A, Coral-García MÁ, Lobato S, Sarvari P, Barreto G, Rubio K. Epigenetic Regulation in Exposome-Induced Tumorigenesis: Emerging Roles of ncRNAs. Biomolecules 2022; 12:513. [PMID: 35454102 PMCID: PMC9032613 DOI: 10.3390/biom12040513] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2022] [Revised: 03/18/2022] [Accepted: 03/21/2022] [Indexed: 02/06/2023] Open
Abstract
Environmental factors, including pollutants and lifestyle, constitute a significant role in severe, chronic pathologies with an essential societal, economic burden. The measurement of all environmental exposures and assessing their correlation with effects on individual health is defined as the exposome, which interacts with our unique characteristics such as genetics, physiology, and epigenetics. Epigenetics investigates modifications in the expression of genes that do not depend on the underlying DNA sequence. Some studies have confirmed that environmental factors may promote disease in individuals or subsequent progeny through epigenetic alterations. Variations in the epigenetic machinery cause a spectrum of different disorders since these mechanisms are more sensitive to the environment than the genome, due to the inherent reversible nature of the epigenetic landscape. Several epigenetic mechanisms, including modifications in DNA (e.g., methylation), histones, and noncoding RNAs can change genome expression under the exogenous influence. Notably, the role of long noncoding RNAs in epigenetic processes has not been well explored in the context of exposome-induced tumorigenesis. In the present review, our scope is to provide relevant evidence indicating that epigenetic alterations mediate those detrimental effects caused by exposure to environmental toxicants, focusing mainly on a multi-step regulation by diverse noncoding RNAs subtypes.
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Affiliation(s)
- Miguel Ángel Olmedo-Suárez
- International Laboratory EPIGEN, Consejo de Ciencia y Tecnología del Estado de Puebla (CONCYTEP), Puebla 72160, Mexico; (M.Á.O.-S.); (I.R.-D.); (A.P.-G.); (A.M.-H.); (M.Á.C.-G.); (S.L.); (P.S.); (G.B.)
- Licenciatura en Médico Cirujano, Universidad de la Salud del Estado de Puebla (USEP), Puebla 72000, Mexico
| | - Ivonne Ramírez-Díaz
- International Laboratory EPIGEN, Consejo de Ciencia y Tecnología del Estado de Puebla (CONCYTEP), Puebla 72160, Mexico; (M.Á.O.-S.); (I.R.-D.); (A.P.-G.); (A.M.-H.); (M.Á.C.-G.); (S.L.); (P.S.); (G.B.)
- Facultad de Biotecnología, Campus Puebla, Universidad Popular Autónoma del Estado de Puebla (UPAEP), Puebla 72410, Mexico
| | - Andrea Pérez-González
- International Laboratory EPIGEN, Consejo de Ciencia y Tecnología del Estado de Puebla (CONCYTEP), Puebla 72160, Mexico; (M.Á.O.-S.); (I.R.-D.); (A.P.-G.); (A.M.-H.); (M.Á.C.-G.); (S.L.); (P.S.); (G.B.)
- Licenciatura en Médico Cirujano, Universidad de la Salud del Estado de Puebla (USEP), Puebla 72000, Mexico
| | - Alejandro Molina-Herrera
- International Laboratory EPIGEN, Consejo de Ciencia y Tecnología del Estado de Puebla (CONCYTEP), Puebla 72160, Mexico; (M.Á.O.-S.); (I.R.-D.); (A.P.-G.); (A.M.-H.); (M.Á.C.-G.); (S.L.); (P.S.); (G.B.)
- Licenciatura en Médico Cirujano, Universidad de la Salud del Estado de Puebla (USEP), Puebla 72000, Mexico
| | - Miguel Ángel Coral-García
- International Laboratory EPIGEN, Consejo de Ciencia y Tecnología del Estado de Puebla (CONCYTEP), Puebla 72160, Mexico; (M.Á.O.-S.); (I.R.-D.); (A.P.-G.); (A.M.-H.); (M.Á.C.-G.); (S.L.); (P.S.); (G.B.)
- Decanato de Ciencias de la Salud, Campus Puebla, Universidad Popular Autónoma del Estado de Puebla (UPAEP), Puebla 72410, Mexico
| | - Sagrario Lobato
- International Laboratory EPIGEN, Consejo de Ciencia y Tecnología del Estado de Puebla (CONCYTEP), Puebla 72160, Mexico; (M.Á.O.-S.); (I.R.-D.); (A.P.-G.); (A.M.-H.); (M.Á.C.-G.); (S.L.); (P.S.); (G.B.)
- Licenciatura en Médico Cirujano, Universidad de la Salud del Estado de Puebla (USEP), Puebla 72000, Mexico
| | - Pouya Sarvari
- International Laboratory EPIGEN, Consejo de Ciencia y Tecnología del Estado de Puebla (CONCYTEP), Puebla 72160, Mexico; (M.Á.O.-S.); (I.R.-D.); (A.P.-G.); (A.M.-H.); (M.Á.C.-G.); (S.L.); (P.S.); (G.B.)
| | - Guillermo Barreto
- International Laboratory EPIGEN, Consejo de Ciencia y Tecnología del Estado de Puebla (CONCYTEP), Puebla 72160, Mexico; (M.Á.O.-S.); (I.R.-D.); (A.P.-G.); (A.M.-H.); (M.Á.C.-G.); (S.L.); (P.S.); (G.B.)
- Laboratoire IMoPA, CNRS, Université de Lorraine, UMR 73635 Nancy, France
- Lung Cancer Epigenetic, Max-Planck-Institute for Heart and Lung Research, 61231 Bad Nauheim, Germany
| | - Karla Rubio
- International Laboratory EPIGEN, Consejo de Ciencia y Tecnología del Estado de Puebla (CONCYTEP), Puebla 72160, Mexico; (M.Á.O.-S.); (I.R.-D.); (A.P.-G.); (A.M.-H.); (M.Á.C.-G.); (S.L.); (P.S.); (G.B.)
- Licenciatura en Médico Cirujano, Universidad de la Salud del Estado de Puebla (USEP), Puebla 72000, Mexico
- Laboratoire IMoPA, CNRS, Université de Lorraine, UMR 73635 Nancy, France
- Lung Cancer Epigenetic, Max-Planck-Institute for Heart and Lung Research, 61231 Bad Nauheim, Germany
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Morlion A, Hulstaert E, Vromman M, Anckaert J, Everaert C, Vandesompele J, Mestdagh P. CiLiQuant: Quantification of RNA Junction Reads Based on Their Circular or Linear Transcript Origin. FRONTIERS IN BIOINFORMATICS 2022; 2:834034. [PMID: 36304262 PMCID: PMC9580843 DOI: 10.3389/fbinf.2022.834034] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2021] [Accepted: 02/07/2022] [Indexed: 11/17/2022] Open
Abstract
Distinguishing circular RNA reads from reads derived from the linear host transcript is a challenging task because of sequence overlap. We developed a computational approach, CiLiQuant, that determines the relative circular and linear abundance of transcripts and gene loci using back-splice and unambiguous forward-splice junction reads generated by existing mapping and circular RNA discovery tools.
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Affiliation(s)
- Annelien Morlion
- Department of Biomolecular Medicine, Ghent University, Ghent, Belgium
- OncoRNALab, Cancer Research Institute Ghent (CRIG), Ghent, Belgium
| | - Eva Hulstaert
- Department of Biomolecular Medicine, Ghent University, Ghent, Belgium
- OncoRNALab, Cancer Research Institute Ghent (CRIG), Ghent, Belgium
| | - Marieke Vromman
- Department of Biomolecular Medicine, Ghent University, Ghent, Belgium
- OncoRNALab, Cancer Research Institute Ghent (CRIG), Ghent, Belgium
| | - Jasper Anckaert
- Department of Biomolecular Medicine, Ghent University, Ghent, Belgium
- OncoRNALab, Cancer Research Institute Ghent (CRIG), Ghent, Belgium
| | - Celine Everaert
- Department of Biomolecular Medicine, Ghent University, Ghent, Belgium
- Translational Oncogenomics and Bioinformatics Lab, Cancer Research Institute Ghent (CRIG), Ghent, Belgium
| | - Jo Vandesompele
- Department of Biomolecular Medicine, Ghent University, Ghent, Belgium
- OncoRNALab, Cancer Research Institute Ghent (CRIG), Ghent, Belgium
| | - Pieter Mestdagh
- Department of Biomolecular Medicine, Ghent University, Ghent, Belgium
- OncoRNALab, Cancer Research Institute Ghent (CRIG), Ghent, Belgium
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Dal Molin A, Gaffo E, Difilippo V, Buratin A, Tretti Parenzan C, Bresolin S, Bortoluzzi S. CRAFT: a bioinformatics software for custom prediction of circular RNA functions. Brief Bioinform 2022; 23:6518047. [PMID: 35106564 PMCID: PMC8921651 DOI: 10.1093/bib/bbab601] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2021] [Revised: 12/10/2021] [Accepted: 12/26/2021] [Indexed: 12/21/2022] Open
Abstract
Circular RNAs (circRNAs), transcripts generated by backsplicing, are particularly stable and pleiotropic molecules, whose dysregulation drives human diseases and cancer by modulating gene expression and signaling pathways. CircRNAs can regulate cellular processes by different mechanisms, including interaction with microRNAs (miRNAs) and RNA-binding proteins (RBP), and encoding specific peptides. The prediction of circRNA functions is instrumental to interpret their impact in diseases, and to prioritize circRNAs for functional investigation. Currently, circRNA functional predictions are provided by web databases that do not allow custom analyses, while self-standing circRNA prediction tools are mostly limited to predict only one type of function, mainly focusing on the miRNA sponge activity of circRNAs. To solve these issues, we developed CRAFT (CircRNA Function prediction Tool), a freely available computational pipeline that predicts circRNA sequence and molecular interactions with miRNAs and RBP, along with their coding potential. Analysis of a set of circRNAs with known functions has been used to appraise CRAFT predictions and to optimize its setting. CRAFT provides a comprehensive graphical visualization of the results, links to several knowledge databases, and extensive functional enrichment analysis. Moreover, it originally combines the predictions for different circRNAs. CRAFT is a useful tool to help the user explore the potential regulatory networks involving the circRNAs of interest and generate hypotheses about the cooperation of circRNAs into the modulation of biological processes.
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Affiliation(s)
- Anna Dal Molin
- Department of Molecular Medicine, University of Padova, Padova, Italy
| | - Enrico Gaffo
- Department of Molecular Medicine, University of Padova, Padova, Italy
| | | | - Alessia Buratin
- Department of Molecular Medicine, University of Padova, Padova, Italy.,Department of Biology, University of Padova, Padova, Italy
| | - Caterina Tretti Parenzan
- Onco-hematology, stem cell transplant and gene therapy laboratory, IRP-Istituto di Ricerca Pediatrica, Padova, Italy.,Pediatric Hematology, Oncology and Stem Cell Transplant Division, Women and Child Health Department, Padua University Hospital
| | - Silvia Bresolin
- Onco-hematology, stem cell transplant and gene therapy laboratory, IRP-Istituto di Ricerca Pediatrica, Padova, Italy.,Pediatric Hematology, Oncology and Stem Cell Transplant Division, Women and Child Health Department, Padua University Hospital
| | - Stefania Bortoluzzi
- Department of Molecular Medicine, University of Padova, Padova, Italy.,Interdepartmental Research Center for Innovative Biotechnologies (CRIBI), University of Padova, Padova, Italy
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Matboli M, Hassan MK, Ali MA, Mansour MT, Elsayed W, Atteya R, Aly HS, Meteini ME, Elghazaly H, El-Khamisy S, Agwa SHA. Impact of circ-0000221 in the Pathogenesis of Hepatocellular via Modulation of miR-661-PTPN11 mRNA Axis. Pharmaceutics 2022; 14:pharmaceutics14010138. [PMID: 35057034 PMCID: PMC8778063 DOI: 10.3390/pharmaceutics14010138] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2021] [Revised: 12/29/2021] [Accepted: 01/05/2022] [Indexed: 02/01/2023] Open
Abstract
Hepatocellular carcinoma (HCC) is a leading cause of cancer-related death in Egypt. A deep understanding of the molecular events occurring in HCC can facilitate the development of novel diagnostic and/or therapeutic approaches. In the present study, we describe a novel axis of hsa-circ-0000221–miR-661–PTPN11 mRNA proposed by in silico and in vitro analysis and its role in HCC pathogenesis. We observe a reduction in the expression levels of hsa-circ-0000221 and PTPN11 mRNA in HCC patients’ sera tested compared with control subjects. The reduction occurs with a concomitant increase in the expression of miR-661. Furthermore, the introduction of exogenous hsa-circ-0000221 into Hep-G2 or SNU449 cell lines results in detectable decrease in cellular viability and an increase in apoptotic manifestations that is associated with G1 accumulation and CCDN1 overexpression. Altogether, these findings indicate the tumor-suppressive role of hsa-circ-0000221 in HCC, which acts through miR-661 inhibition, along with a subsequent PTPN11 mRNA increase, where PTPN11 is known to inhibit cell proliferation in many forms of cancer. Our study encourages further investigation of the role of circRNAs in cancer and their potential use as molecular biomarkers.
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Affiliation(s)
- Marwa Matboli
- Medical Biochemistry and Molecular Biology Department, Faculty of Medicine, Ain Shams University, Abbassia, Cairo 11381, Egypt;
- Correspondence: (M.M.); (S.H.A.A.)
| | - Mohmed Kamal Hassan
- Center for Genomics, Helmy Institute for Medical Sciences, Zewail City for Science and Technology, Giza 12578, Egypt; (M.K.H.); (W.E.); (R.A.)
- Biotechnology Program, Biology Division, Zoology Department, Faculty of Science, Port Said University, Port Said 42526, Egypt
| | - Mahmoud A. Ali
- Department of Biomedical Research, Armed Forces College of Medicine (AFCM), Cairo 11774, Egypt; (M.A.A.); or (M.T.M.)
| | - Mohamed Tarek Mansour
- Department of Biomedical Research, Armed Forces College of Medicine (AFCM), Cairo 11774, Egypt; (M.A.A.); or (M.T.M.)
| | - Waheba Elsayed
- Center for Genomics, Helmy Institute for Medical Sciences, Zewail City for Science and Technology, Giza 12578, Egypt; (M.K.H.); (W.E.); (R.A.)
| | - Reham Atteya
- Center for Genomics, Helmy Institute for Medical Sciences, Zewail City for Science and Technology, Giza 12578, Egypt; (M.K.H.); (W.E.); (R.A.)
| | - Hebatallah Said Aly
- Medical Biochemistry and Molecular Biology Department, Faculty of Medicine, Ain Shams University, Abbassia, Cairo 11381, Egypt;
| | - Mahmoud El Meteini
- Department of General Surgery, The School of Medicine, University of Ain Shams, Abbassia, Cairo 11382, Egypt;
| | - Hesham Elghazaly
- Oncology Department, Faculty of Medicine, Medical Ain Shams Research Institute (MASRI), Ain Shams University, Cairo 11382, Egypt;
| | - Sherif El-Khamisy
- The Healthy Lifespan Institute, The Institute of Neuroscience, Department of Molecular Biology and Biotechnology, University of Sheffield, Sheffield S10 2TN, UK;
- The Institute of Cancer Therapeutics, West Yorkshire BD7 1DP, UK
| | - Sara H. A. Agwa
- Clinical pathology and Molecular Genomics Unit, Faculty of Medicine, Medical Ain Shams Research Institute (MASRI), Ain Shams University, Cairo 11382, Egypt
- Correspondence: (M.M.); (S.H.A.A.)
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Wen G, Zhou T, Gu W. The potential of using blood circular RNA as liquid biopsy biomarker for human diseases. Protein Cell 2021; 12:911-946. [PMID: 33131025 PMCID: PMC8674396 DOI: 10.1007/s13238-020-00799-3] [Citation(s) in RCA: 88] [Impact Index Per Article: 29.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2020] [Accepted: 10/09/2020] [Indexed: 12/14/2022] Open
Abstract
Circular RNA (circRNA) is a novel class of single-stranded RNAs with a closed loop structure. The majority of circRNAs are formed by a back-splicing process in pre-mRNA splicing. Their expression is dynamically regulated and shows spatiotemporal patterns among cell types, tissues and developmental stages. CircRNAs have important biological functions in many physiological processes, and their aberrant expression is implicated in many human diseases. Due to their high stability, circRNAs are becoming promising biomarkers in many human diseases, such as cardiovascular diseases, autoimmune diseases and human cancers. In this review, we focus on the translational potential of using human blood circRNAs as liquid biopsy biomarkers for human diseases. We highlight their abundant expression, essential biological functions and significant correlations to human diseases in various components of peripheral blood, including whole blood, blood cells and extracellular vesicles. In addition, we summarize the current knowledge of blood circRNA biomarkers for disease diagnosis or prognosis.
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Affiliation(s)
- Guoxia Wen
- State Key Laboratory of Bioelectronics, School of Biological Sciences and Medical Engineering, Southeast University, Nanjing, 210096, China
| | - Tong Zhou
- Department of Physiology and Cell Biology, Reno School of Medicine, University of Nevada, Reno, NV, 89557, USA.
| | - Wanjun Gu
- State Key Laboratory of Bioelectronics, School of Biological Sciences and Medical Engineering, Southeast University, Nanjing, 210096, China.
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Zhang Y, Huang G, Yuan Z, Zhang Y, Chen X, Huang J, Li N, Liu Z, Zhong W, Huang H, Huang C, Wei Y. Profiling and Bioinformatics Analysis Revealing Differential Circular RNA Expression about Storage Lesion Regulatory in Stored Red Blood Cells. Transfus Med Hemother 2021; 49:76-87. [DOI: 10.1159/000519626] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2019] [Accepted: 09/08/2021] [Indexed: 11/19/2022] Open
Abstract
Introduction: Circular RNA (circRNA) plays an important role in regulating metabolism of red blood cells (RBCs) and their storage lesions, but the study of how circRNA expression changes in stored RBCs has rarely been conducted. Methods: The expression change of circRNA was systemically evaluated via high-throughput sequencing on healthy RBCs on day 0, 20, and 40. And then we confirmed the reliability of the high-throughput sequencing analysis by RT-qPCR characterization on selected circRNAs. A higher parental gene enrichment was used to explore circRNA function in pathways. In addition, we deciphered a dysregulated circRNA-related ceRNAs network, and identified three circRNA-miRNA-mRNA regulatory axes related to storage lesion. Results: We identified 2,586 known and 6,216 putative novel circRNAs, more than 100 circRNAs expression levels were shifted, and the number of downregulated circRNAs was greater with longer storage time. Furthermore, a higher parental gene enrichment related to circRNA was found in pathways, including cAMP signaling pathway, ubiquitin-mediated proteolysis, apoptosis, adhesion, MAPK signaling pathway, cystine methionine metabolism, RNA degradation, RNA transport, TGF-β, and actin regulatory pathway. hsa_circ_0007127-miR-513a-5p-SMAD4, hsa_circ_0000033-miR-19a-3p-VAMP3, and hsa_circ_0005546-miR-4720-CCND3 regulatory axes related to storage lesion was found. Conclusions: Through investigation in circRNAs profile and circRNA-miRNA-mRNA interactions, this study provides insights on stored RBC circRNA expression changes, which closely relate to the storage lesion of RBCs and their physiological functions.
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Babin L, Andraos E, Fuchs S, Pyronnet S, Brunet E, Meggetto F. From circRNAs to fusion circRNAs in hematological malignancies. JCI Insight 2021; 6:151513. [PMID: 34747369 PMCID: PMC8663548 DOI: 10.1172/jci.insight.151513] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
Circular RNAs (circRNAs) represent a type of endogenous noncoding RNA generated by back-splicing events. Unlike the majority of RNAs, circRNAs are covalently closed, without a 5' end or a 3' poly(A) tail. A few circRNAs can be associated with polysomes, suggesting a protein-coding potential. CircRNAs are not degraded by RNA exonucleases or ribonuclease R and are enriched in exosomes. Recent developments in experimental methods coupled with evolving bioinformatic approaches have accelerated functional investigation of circRNAs, which exhibit a stable structure, a long half-life, and tumor specificity and can be extracted from body fluids and used as potential biological markers for tumors. Moreover, circRNAs may regulate the occurrence and development of cancers and contribute to drug resistance through a variety of molecular mechanisms. Despite the identification of a growing number of circRNAs, their effects in hematological cancers remain largely unknown. Recent studies indicate that circRNAs could also originate from fusion genes (fusion circRNAs, f-circRNAs) next to chromosomal translocations, which are considered the primary cause of various cancers, notably hematological malignancies. This Review will focus on circRNAs and f-circRNAs in hematological cancers.
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Affiliation(s)
- Loelia Babin
- CRCT INSERM, UMR1037, Toulouse, France.,Toulouse III University-Paul Sabatier, UMR1037 INSERM, UMR5071 CNRS, Toulouse, France.,The Toulouse Cancer Laboratory of Excellence (TOUCAN), Toulouse, France
| | - Elissa Andraos
- CRCT INSERM, UMR1037, Toulouse, France.,Toulouse III University-Paul Sabatier, UMR1037 INSERM, UMR5071 CNRS, Toulouse, France.,The Toulouse Cancer Laboratory of Excellence (TOUCAN), Toulouse, France
| | - Steffen Fuchs
- CRCT INSERM, UMR1037, Toulouse, France.,Toulouse III University-Paul Sabatier, UMR1037 INSERM, UMR5071 CNRS, Toulouse, France.,The Toulouse Cancer Laboratory of Excellence (TOUCAN), Toulouse, France.,Department of Pediatric Oncology, Charité University Berlin, Berlin, Germany.,Berlin Institute of Health (BIH), Berlin, Germany.,German Cancer Consortium (DKTK), Partner Site Berlin, German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Stéphane Pyronnet
- CRCT INSERM, UMR1037, Toulouse, France.,Toulouse III University-Paul Sabatier, UMR1037 INSERM, UMR5071 CNRS, Toulouse, France.,The Toulouse Cancer Laboratory of Excellence (TOUCAN), Toulouse, France
| | - Erika Brunet
- Imagine Institute INSERM Joint Research Unit 1163, Laboratory of Genome Dynamics in the Immune System, Paris, France.,Paris Descartes-Sorbonne University, Imagine Institute, Paris, France
| | - Fabienne Meggetto
- CRCT INSERM, UMR1037, Toulouse, France.,Toulouse III University-Paul Sabatier, UMR1037 INSERM, UMR5071 CNRS, Toulouse, France.,The Toulouse Cancer Laboratory of Excellence (TOUCAN), Toulouse, France
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Gaffo E, Buratin A, Dal Molin A, Bortoluzzi S. Sensitive, reliable and robust circRNA detection from RNA-seq with CirComPara2. Brief Bioinform 2021; 23:6409697. [PMID: 34698333 PMCID: PMC8769706 DOI: 10.1093/bib/bbab418] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2021] [Revised: 09/09/2021] [Accepted: 09/12/2021] [Indexed: 12/11/2022] Open
Abstract
Circular RNAs (circRNAs) are a large class of covalently closed RNA molecules originating by a process called back-splicing. CircRNAs are emerging as functional RNAs involved in the regulation of biological processes as well as in disease and cancer mechanisms. Current computational methods for circRNA identification from RNA-seq experiments are characterized by low discovery rates and performance dependent on the analysed data set. We developed CirComPara2 (https://github.com/egaffo/CirComPara2), a new automated computational pipeline for circRNA discovery and quantification, which consistently achieves high recall rates without losing precision by combining multiple circRNA detection methods. In our benchmark analysis, CirComPara2 outperformed state-of-the-art circRNA discovery tools and proved to be a reliable and robust method for comprehensive transcriptome characterization.
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Affiliation(s)
- Enrico Gaffo
- Department of Molecular Medicine, University of Padova, Padova, Italy
| | - Alessia Buratin
- Department of Molecular Medicine, University of Padova, Padova, Italy; Department of Biology, University of Padova, Padova, Italy
| | - Anna Dal Molin
- Department of Molecular Medicine, University of Padova, Padova, Italy
| | - Stefania Bortoluzzi
- Department of Molecular Medicine, University of Padova, Padova, Italy; Interdepartmental Center For Innovative Biotechnologies, University of Padova, Padova, Italy
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Gaffo E, Buratin A, Dal Molin A, Bortoluzzi S. Bioinformatic Analysis of Circular RNA Expression. Methods Mol Biol 2021; 2348:343-370. [PMID: 34160817 DOI: 10.1007/978-1-0716-1581-2_22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/25/2023]
Abstract
Circular RNAs (circRNAs) are stable RNA molecules generated by backsplicing that play regulatory functions through interaction with other RNA and proteins, as well as by encoding peptides. Dysregulation of circRNA expression can drive cancer development and progression with different mechanisms. CircRNAs are currently regarded as extremely attractive molecules in cancer research for the identification of new and possibly targetable disease regulatory networks and for the development of biomarkers for cancer diagnosis, prognosis definition, and monitoring. Using specific experimental and computational protocols, circRNAs can be identified through RNA-seq by spotting the reads spanning backsplice junctions, which are specific to circular molecules. In this chapter, we report a state-of-the-art computational protocol for a genome-wide analysis of circRNAs from RNA-seq data, which considers circRNA detection, quantification, and differential expression testing. Finally, we indicate how to determine circular transcript sequences and the resources for an in silico functional characterization of circRNAs.
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Affiliation(s)
- Enrico Gaffo
- Department of Molecular Medicine, University of Padova, Padova, Italy
| | - Alessia Buratin
- Department of Molecular Medicine, University of Padova, Padova, Italy.,Department of Biology, University of Padova, Padova, Italy
| | - Anna Dal Molin
- Department of Molecular Medicine, University of Padova, Padova, Italy
| | - Stefania Bortoluzzi
- Department of Molecular Medicine, University of Padova, Padova, Italy. .,Interdepartmental Research Center for Innovative Biotechnologies (CRIBI), University of Padova, Padova, Italy.
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Mahmoudi E, Green MJ, Cairns MJ. Dysregulation of circRNA expression in the peripheral blood of individuals with schizophrenia and bipolar disorder. J Mol Med (Berl) 2021; 99:981-991. [PMID: 33782720 DOI: 10.1007/s00109-021-02070-6] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2020] [Revised: 03/21/2021] [Accepted: 03/23/2021] [Indexed: 02/07/2023]
Abstract
Circular RNAs (circRNAs) are head-to-tail back-spliced RNA transcripts that have been linked to several biological processes and their perturbation is evident in human disease, including neurological disorders. There is also emerging research suggesting circRNA expression may also be altered in psychiatric and behavioural syndromes. Here, we provide a comprehensive analysis of circRNA expression in peripheral blood mononuclear cells (PBMCs) from 39 patients with schizophrenia and bipolar disorder as well as 20 healthy individuals using deep RNA-seq. We observed systematic alternative splicing leading to a complex and diverse profile of RNA transcripts including 8762 high confidence circRNAs. More specific scrutiny of the circular transcriptome in schizophrenia and bipolar disorder, compared to a non-psychiatric control group, revealed significant dysregulation of 55 circRNAs with a bias towards downregulation. These molecules were predicted to interact with a large number of miRNAs that target genes enriched in psychiatric disorders. Further replication and cross-validation to determine the specificity of these circRNAs across broader diagnostic groups and subgroups in psychiatry will enable their potential utility as biomarkers to be established. KEY MESSAGES: • We identified 8762 high confidence circRNAs with systematic alternative splicing in human PBMCs. • CircRNAs were dysregulated in schizophrenia and bipolar disorder, compared to a non-psychiatric control group. • The DE circRNAs were predicted to interact with miRNAs with target genes enriched in psychiatric disorders. • Some circRNAs have the potential to serve as biomarkers in psychiatry.
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Affiliation(s)
- Ebrahim Mahmoudi
- School of Biomedical Sciences and Pharmacy, University of Newcastle, University Drive, Callaghan, NSW, 2308, Australia.,Centre for Brain and Mental Health Research, University of Newcastle, Callaghan, NSW, 2308, Australia.,Hunter Medical Research Institute, New Lambton Heights, Australia
| | - Melissa J Green
- School of Psychiatry, University of New South Wales (UNSW), Sydney, NSW, Australia.,Neuroscience Research Australia (NeuRA), Randwick, NSW, Australia
| | - Murray J Cairns
- School of Biomedical Sciences and Pharmacy, University of Newcastle, University Drive, Callaghan, NSW, 2308, Australia. .,Centre for Brain and Mental Health Research, University of Newcastle, Callaghan, NSW, 2308, Australia. .,Hunter Medical Research Institute, New Lambton Heights, Australia.
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40
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Stella M, Falzone L, Caponnetto A, Gattuso G, Barbagallo C, Battaglia R, Mirabella F, Broggi G, Altieri R, Certo F, Caltabiano R, Barbagallo GMV, Musumeci P, Ragusa M, Pietro CD, Libra M, Purrello M, Barbagallo D. Serum Extracellular Vesicle-Derived circHIPK3 and circSMARCA5 Are Two Novel Diagnostic Biomarkers for Glioblastoma Multiforme. Pharmaceuticals (Basel) 2021; 14:ph14070618. [PMID: 34198978 PMCID: PMC8308516 DOI: 10.3390/ph14070618] [Citation(s) in RCA: 65] [Impact Index Per Article: 21.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2021] [Revised: 06/22/2021] [Accepted: 06/25/2021] [Indexed: 01/05/2023] Open
Abstract
Glioblastoma multiforme (GBM) is the most frequent and deadly human brain cancer. Early diagnosis through non-invasive biomarkers may render GBM more easily treatable, improving the prognosis of this currently incurable disease. We suggest the use of serum extracellular vesicle (sEV)-derived circular RNAs (circRNAs) as highly stable minimally invasive diagnostic biomarkers for GBM diagnosis. EVs were isolated by size exclusion chromatography from sera of 23 GBM and 5 grade 3 glioma (GIII) patients, and 10 unaffected controls (UC). The expression of two candidate circRNAs (circSMARCA5 and circHIPK3) was assayed by droplet digital PCR. CircSMARCA5 and circHIPK3 were significantly less abundant in sEVs from GBM patients with respect to UC (fold-change (FC) of -2.15 and -1.92, respectively) and GIII (FC of -1.75 and -1.4, respectively). Receiver operating characteristic curve (ROC) analysis, based on the expression of sEV-derived circSMARCA5 and circHIPK3, allowed us to distinguish GBM from UC (area under the curve (AUC) 0.823 (0.667-0.979) and 0.855 (0.704 to 1.000), with a 95% confidence interval (CI), respectively). Multivariable ROC analysis, performed by combining the expression of sEV-derived circSMARCA5 and circHIPK3 with preoperative neutrophil to lymphocyte (NLR), platelet to lymphocyte (PLR) and lymphocyte to monocyte (LMR) ratios, three known diagnostic and prognostic GBM markers, allowed an improvement in the GBM diagnostic accuracy (AUC 0.901 (0.7912 to 1.000), 95% CI). Our data suggest sEV-derived circSMARCA5 and circHIPK3 as good diagnostic biomarkers for GBM, especially when associated with preoperative NLR, PLR and LMR.
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Affiliation(s)
- Michele Stella
- Department of Biomedical and Biotechnological Sciences, Section of Biology and Genetics Giovanni Sichel, University of Catania, 95123 Catania, Italy; (M.S.); (A.C.); (C.B.); (R.B.); (F.M.); (M.R.); (C.D.P.); (M.P.)
| | - Luca Falzone
- Department of Biomedical and Biotechnological Sciences, Section of Pathology, University of Catania, 95123 Catania, Italy; (L.F.); (G.G.); (M.L.)
| | - Angela Caponnetto
- Department of Biomedical and Biotechnological Sciences, Section of Biology and Genetics Giovanni Sichel, University of Catania, 95123 Catania, Italy; (M.S.); (A.C.); (C.B.); (R.B.); (F.M.); (M.R.); (C.D.P.); (M.P.)
| | - Giuseppe Gattuso
- Department of Biomedical and Biotechnological Sciences, Section of Pathology, University of Catania, 95123 Catania, Italy; (L.F.); (G.G.); (M.L.)
| | - Cristina Barbagallo
- Department of Biomedical and Biotechnological Sciences, Section of Biology and Genetics Giovanni Sichel, University of Catania, 95123 Catania, Italy; (M.S.); (A.C.); (C.B.); (R.B.); (F.M.); (M.R.); (C.D.P.); (M.P.)
| | - Rosalia Battaglia
- Department of Biomedical and Biotechnological Sciences, Section of Biology and Genetics Giovanni Sichel, University of Catania, 95123 Catania, Italy; (M.S.); (A.C.); (C.B.); (R.B.); (F.M.); (M.R.); (C.D.P.); (M.P.)
| | - Federica Mirabella
- Department of Biomedical and Biotechnological Sciences, Section of Biology and Genetics Giovanni Sichel, University of Catania, 95123 Catania, Italy; (M.S.); (A.C.); (C.B.); (R.B.); (F.M.); (M.R.); (C.D.P.); (M.P.)
| | - Giuseppe Broggi
- Department of Medical, Surgical Sciences and Advanced Technologies “G.F. Ingrassia”, Section of Anatomic Pathology, University of Catania, 95123 Catania, Italy; (G.B.); (R.C.)
| | - Roberto Altieri
- Department of Medical, Surgical Sciences and Advanced Technologies “G.F. Ingrassia”, Neurological Surgery, Policlinico “Rodolico-San Marco” University Hospital, University of Catania, 95123 Catania, Italy; (R.A.); (F.C.); (G.M.V.B.)
- Interdisciplinary Research Centre on the Diagnosis and Therapy of Brain Tumors, University of Catania, 95123 Catania, Italy
| | - Francesco Certo
- Department of Medical, Surgical Sciences and Advanced Technologies “G.F. Ingrassia”, Neurological Surgery, Policlinico “Rodolico-San Marco” University Hospital, University of Catania, 95123 Catania, Italy; (R.A.); (F.C.); (G.M.V.B.)
- Interdisciplinary Research Centre on the Diagnosis and Therapy of Brain Tumors, University of Catania, 95123 Catania, Italy
| | - Rosario Caltabiano
- Department of Medical, Surgical Sciences and Advanced Technologies “G.F. Ingrassia”, Section of Anatomic Pathology, University of Catania, 95123 Catania, Italy; (G.B.); (R.C.)
| | - Giuseppe Maria Vincenzo Barbagallo
- Department of Medical, Surgical Sciences and Advanced Technologies “G.F. Ingrassia”, Neurological Surgery, Policlinico “Rodolico-San Marco” University Hospital, University of Catania, 95123 Catania, Italy; (R.A.); (F.C.); (G.M.V.B.)
- Interdisciplinary Research Centre on the Diagnosis and Therapy of Brain Tumors, University of Catania, 95123 Catania, Italy
| | - Paolo Musumeci
- Department of Physics and Astronomy, University of Catania, 95123 Catania, Italy;
| | - Marco Ragusa
- Department of Biomedical and Biotechnological Sciences, Section of Biology and Genetics Giovanni Sichel, University of Catania, 95123 Catania, Italy; (M.S.); (A.C.); (C.B.); (R.B.); (F.M.); (M.R.); (C.D.P.); (M.P.)
- Interdisciplinary Research Centre on the Diagnosis and Therapy of Brain Tumors, University of Catania, 95123 Catania, Italy
| | - Cinzia Di Pietro
- Department of Biomedical and Biotechnological Sciences, Section of Biology and Genetics Giovanni Sichel, University of Catania, 95123 Catania, Italy; (M.S.); (A.C.); (C.B.); (R.B.); (F.M.); (M.R.); (C.D.P.); (M.P.)
| | - Massimo Libra
- Department of Biomedical and Biotechnological Sciences, Section of Pathology, University of Catania, 95123 Catania, Italy; (L.F.); (G.G.); (M.L.)
- Research Center for Prevention, Diagnosis and Treatment of Cancer, University of Catania, 95123 Catania, Italy
| | - Michele Purrello
- Department of Biomedical and Biotechnological Sciences, Section of Biology and Genetics Giovanni Sichel, University of Catania, 95123 Catania, Italy; (M.S.); (A.C.); (C.B.); (R.B.); (F.M.); (M.R.); (C.D.P.); (M.P.)
- Interdisciplinary Research Centre on the Diagnosis and Therapy of Brain Tumors, University of Catania, 95123 Catania, Italy
| | - Davide Barbagallo
- Department of Biomedical and Biotechnological Sciences, Section of Biology and Genetics Giovanni Sichel, University of Catania, 95123 Catania, Italy; (M.S.); (A.C.); (C.B.); (R.B.); (F.M.); (M.R.); (C.D.P.); (M.P.)
- Interdisciplinary Research Centre on the Diagnosis and Therapy of Brain Tumors, University of Catania, 95123 Catania, Italy
- Correspondence: ; Tel.: +39-0953782089
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Jia Y, Gu W. Up-regulation of circPVT1 in T cell acute lymphoblastic leukemia promoted cell proliferation via miR-30e/DLL4 induced activating NOTCH signaling. Pathol Res Pract 2021; 224:153536. [PMID: 34237615 DOI: 10.1016/j.prp.2021.153536] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/30/2021] [Revised: 06/20/2021] [Accepted: 06/21/2021] [Indexed: 12/30/2022]
Abstract
T cell acute lymphoblastic leukemia (T-ALL) is an aggressive hematologic cancer with dismal prognosis. Recent studies disclosed that circPVT1 played an oncogene role in various cancers. But its role in T-ALL is still unclear. In this study, we found the expression levels of circPVT1 in bone marrows and cell lines of T-ALL were significantly up regulated and knock-down of circPVT1 in T-ALL cell lines could inhibit the cell proliferation and increase the cell apoptosis. Further analysis showed that circPVT1 could bind directly to miR-30e and contributed to the activate the Notch signaling by regulating miR-30e/DLL4 pathway. The levels of circPVT1 were obviously related to cumulative relapse rate and 5-year survival rate. In conclusion, our study reveals that circPVT1 participates in the progression of T-ALL through the miR-30e/DLL4 pathway and might represent a potential therapeutic target for T-ALL treatment.
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Affiliation(s)
- Yongqing Jia
- Departrment of Hematology, The Third Affiliated Hospital of Soochow University, Changzhou, China; Departrment of Hematology, Jinhua Hospital, Zhejiang University School of Medicine, Jinhua, China
| | - Weiying Gu
- Departrment of Hematology, The Third Affiliated Hospital of Soochow University, Changzhou, China.
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Large-scale circular RNA deregulation in T-ALL: unlocking unique ectopic expression of molecular subtypes. Blood Adv 2021; 4:5902-5914. [PMID: 33259601 DOI: 10.1182/bloodadvances.2020002337] [Citation(s) in RCA: 33] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2020] [Accepted: 10/20/2020] [Indexed: 12/25/2022] Open
Abstract
Circular RNAs (circRNAs) are stable RNA molecules that can drive cancer through interactions with microRNAs and proteins and by the expression of circRNA encoded peptides. The aim of the study was to define the circRNA landscape and potential impact in T-cell acute lymphoblastic leukemia (T-ALL). Analysis by CirComPara of RNA-sequencing data from 25 T-ALL patients, immature, HOXA overexpressing, TLX1, TLX3, TAL1, or LMO2 rearranged, and from thymocyte populations of human healthy donors disclosed 68 554 circRNAs. Study of the top 3447 highly expressed circRNAs identified 944 circRNAs with significant differential expression between malignant T cells and normal counterparts, with most circRNAs displaying increased expression in T-ALL. Next, we defined subtype-specific circRNA signatures in molecular genetic subgroups of human T-ALL. In particular, circZNF609, circPSEN1, circKPNA5, and circCEP70 were upregulated in immature, circTASP1, circZBTB44, and circBACH1 in TLX3, circHACD1, and circSTAM in HOXA, circCAMSAP1 in TLX1, and circCASC15 in TAL-LMO. Backsplice sequences of 14 circRNAs ectopically expressed in T-ALL were confirmed, and overexpression of circRNAs in T-ALL with specific oncogenic lesions was substantiated by quantification in a panel of 13 human cell lines. An oncogenic role of circZNF609 in T-ALL was indicated by decreased cell viability upon silencing in vitro. Furthermore, functional predictions identified circRNA-microRNA gene axes informing modes of circRNA impact in molecular subtypes of human T-ALL.
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de Sá Pereira BM, Montalvão de Azevedo R, da Silva Guerra JV, Faria PA, Soares-Lima SC, De Camargo B, Maschietto M. Non-coding RNAs in Wilms' tumor: biological function, mechanism, and clinical implications. J Mol Med (Berl) 2021; 99:1043-1055. [PMID: 33950291 DOI: 10.1007/s00109-021-02075-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2020] [Revised: 03/04/2021] [Accepted: 04/06/2021] [Indexed: 10/21/2022]
Abstract
Non-coding RNAs are involved with maintenance and regulation of physiological mechanisms and are involved in pathological processes, such as cancer. Among the small ncRNAs, miRNAs are the most explored in tumorigenesis, metastasis development, and resistance to chemotherapy. These small molecules of ~ 22 nucleotides are modulated during early renal development, involved in the regulation of gene expression and Wilms' tumor progression. Wilms' tumors are embryonic tumors with few mutations and complex epigenetic dysregulation. In recent years, the small ncRNAs have been explored as potentially related both in physiological development and in the tumorigenesis of several types of cancer. Besides, genes regulated by miRNAs are related to biological pathways as PI3K, Wnt, TGF-β, and Hippo signaling pathways, among others, which may be involved with the underlying mechanisms of resistance to chemotherapy, and in this way, it has emerged as potential targets for cancer therapies, including for Wilms' tumors.
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Affiliation(s)
| | - Rafaela Montalvão de Azevedo
- Brazilian National Cancer Institute (INCa), Rio de Janeiro, RJ, Brazil.,Current institution: Molecular Bases of Genetic Risk and Genetic Testing Unit, Research Department, Fondazione IRCCS Istituto Nazionale dei Tumori, Milan, Italy
| | - João Victor da Silva Guerra
- Brazilian Biosciences National Laboratory (LNBio), Brazilian Center for Research in Energy and Materials (CNPEM), Campinas, SP, Brazil.,Postgraduate Program in Pharmaceutical Sciences, Faculty of Pharmaceutic Sciences, University of Campinas, Campinas, SP, Brazil
| | - Paulo A Faria
- Brazilian National Cancer Institute (INCa), Rio de Janeiro, RJ, Brazil
| | | | | | - Mariana Maschietto
- Brazilian Biosciences National Laboratory (LNBio), Brazilian Center for Research in Energy and Materials (CNPEM), Campinas, SP, Brazil. .,Current: Research Institute, Boldrini Children's Hospital, Rua Dr. Gabriel Porto, 1270 - Cidade Universitária, Campinas, SP, 13083-210, Brazil.
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Ren H, Song Z, Chao C, Mao W. circCCDC66 promotes thyroid cancer cell proliferation, migratory and invasive abilities and glycolysis through the miR-211-5p/PDK4 axis. Oncol Lett 2021; 21:416. [PMID: 33841577 PMCID: PMC8020395 DOI: 10.3892/ol.2021.12677] [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: 09/01/2020] [Accepted: 01/20/2021] [Indexed: 12/12/2022] Open
Abstract
Cancer metastasis is the main cause of death in cancer patients, including patients with thyroid cancer (TC). TC is the most common malignant endocrine tumour. In the recent years, increasing evidence has demonstrated that circular RNAs (circRNAs) serve a significant role in the development of many types of human cancer. However, the function and underlying mechanism of circCCDC66 in TC remain unclear. The present study aimed to explore the role of circCCDC66 in TC. To do so, reverse transcription quantitative PCR was used to detect the expression level of circCCDC66. Cell viability, migratory and invasive abilities, and glucose consumption were evaluated by cell counting kit 8, Transwell and glucose consumption assays, respectively. The association between circCCDC66 or pyruvate dehydrogenase kinase 4 (PDK4) and miR-211-5p was verified by dual-luciferase reporter assay. The results demonstrated that circCCDC66 expression was significantly increased in TC tissues and cell lines. Furthermore, silencing circCCDC66 inhibited TC cell proliferation, migratory and invasive abilities and glycolysis in vitro. Further validation demonstrated that circCCDC66 directly interacted with the microRNA (miR) miR-211-5p. Subsequently, the activity of circCCDC66 was attenuated by miR-211-5p. In addition, the results demonstrated that circCCDC66 may promote papillary thyroid cancer progression by sponging miR-211-5p and increasing expression of PDK4. In conclusion, the present study demonstrated that circCCDC66 could promote TC cell proliferation, migratory and invasive abilities and invasion and glycolysis through the miR-211-5p/PDK4 axis. These findings suggested that targeting circCCDC66 may be considered as a promising therapeutic strategy for TC.
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Affiliation(s)
- Hong Ren
- Department of General Surgery, Qingdao Municipal Hospital, Qingdao University School of Medicine, Shandong, Qingdao 266000, P.R. China
| | - Zhendi Song
- Department of General Surgery, Qingdao Municipal Hospital, Qingdao University School of Medicine, Shandong, Qingdao 266000, P.R. China
| | - Chen Chao
- Department of General Surgery, Jintan Hospital, Jiangsu University School of Medicine, Changzhou, Jiangsu 213200, P.R. China
| | - Weizheng Mao
- Department of General Surgery, Qingdao Municipal Hospital, Qingdao University School of Medicine, Shandong, Qingdao 266000, P.R. China
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Lux S, Blätte TJ, Gillissen B, Richter A, Cocciardi S, Skambraks S, Schwarz K, Schrezenmeier H, Döhner H, Döhner K, Dolnik A, Bullinger L. Deregulated expression of circular RNAs in acute myeloid leukemia. Blood Adv 2021; 5:1490-1503. [PMID: 33683343 PMCID: PMC7948263 DOI: 10.1182/bloodadvances.2020003230] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2020] [Accepted: 01/28/2021] [Indexed: 02/07/2023] Open
Abstract
Circular RNAs (circRNAs) are dynamically regulated during differentiation and show cell type-specific expression, which is altered in cancer and can have a direct impact on its various hallmarks. We hypothesized that circRNA expression is deregulated in acute myeloid leukemia (AML) and that circRNA candidates might contribute to the pathogenesis of the disease. To identify leukemia-associated and differentiation-independent changes in circRNA expression, we determined the circular RNAome of 61 AML patients and 16 healthy hematopoietic stem and progenitor cell (HSPC) samples using ribosomal RNA-depleted RNA sequencing. We found hundreds of circRNAs that were differentially expressed between AML and healthy HSPCs. Gene set analysis found that many of these circRNAs were transcribed from genes implicated in leukemia biology. We discovered a circRNA derived from the T-cell transcription factor gene B cell CLL/lymphoma 11B, circBCL11B, which was exclusively expressed in AML patients, but not detected in healthy HSPCs, and associated with a T-cell-like gene expression signature. We were able to validate this finding in an independent cohort of 332 AML patients. Knockdown of circBCL11B had a negative effect on leukemic cell proliferation and resulted in increased cell death of leukemic cells, thereby suggesting circBCL11B as a novel functionally relevant candidate in AML pathogenesis. In summary, our study enables comprehensive insights into circRNA expression changes upon leukemic transformation and provides valuable information on the biology of leukemic cells and potential novel pathway dependencies that are relevant for AML therapy.
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Affiliation(s)
- Susanne Lux
- Internal Medicine III, University Hospital Ulm, Ulm, Germany
| | - Tamara J Blätte
- Internal Medicine III, University Hospital Ulm, Ulm, Germany
- Department of Hematology, Oncology, and Tumorimmunology, Charité University Medicine, Berlin, Germany
| | - Bernhard Gillissen
- Department of Hematology, Oncology, and Tumorimmunology, Charité University Medicine, Berlin, Germany
| | - Antje Richter
- Department of Hematology, Oncology, and Tumorimmunology, Charité University Medicine, Berlin, Germany
| | | | | | - Klaus Schwarz
- Institute for Transfusion Medicine, University of Ulm, Ulm, Germany; and
- Institute for Clinical Transfusion Medicine and Immunogenetics Ulm, German Red Cross Blood Donor Service Baden-Wuerttemberg-Hessen, Ulm, Germany
| | - Hubert Schrezenmeier
- Institute for Transfusion Medicine, University of Ulm, Ulm, Germany; and
- Institute for Clinical Transfusion Medicine and Immunogenetics Ulm, German Red Cross Blood Donor Service Baden-Wuerttemberg-Hessen, Ulm, Germany
| | - Hartmut Döhner
- Internal Medicine III, University Hospital Ulm, Ulm, Germany
| | | | - Anna Dolnik
- Internal Medicine III, University Hospital Ulm, Ulm, Germany
- Department of Hematology, Oncology, and Tumorimmunology, Charité University Medicine, Berlin, Germany
| | - Lars Bullinger
- Internal Medicine III, University Hospital Ulm, Ulm, Germany
- Department of Hematology, Oncology, and Tumorimmunology, Charité University Medicine, Berlin, Germany
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Rodriguez PD, Paculova H, Kogut S, Heath J, Schjerven H, Frietze S. Non-Coding RNA Signatures of B-Cell Acute Lymphoblastic Leukemia. Int J Mol Sci 2021; 22:ijms22052683. [PMID: 33799946 PMCID: PMC7961854 DOI: 10.3390/ijms22052683] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2021] [Revised: 03/01/2021] [Accepted: 03/03/2021] [Indexed: 12/15/2022] Open
Abstract
Non-coding RNAs (ncRNAs) comprise a diverse class of non-protein coding transcripts that regulate critical cellular processes associated with cancer. Advances in RNA-sequencing (RNA-Seq) have led to the characterization of non-coding RNA expression across different types of human cancers. Through comprehensive RNA-Seq profiling, a growing number of studies demonstrate that ncRNAs, including long non-coding RNA (lncRNAs) and microRNAs (miRNA), play central roles in progenitor B-cell acute lymphoblastic leukemia (B-ALL) pathogenesis. Furthermore, due to their central roles in cellular homeostasis and their potential as biomarkers, the study of ncRNAs continues to provide new insight into the molecular mechanisms of B-ALL. This article reviews the ncRNA signatures reported for all B-ALL subtypes, focusing on technological developments in transcriptome profiling and recently discovered examples of ncRNAs with biologic and therapeutic relevance in B-ALL.
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Affiliation(s)
- Princess D. Rodriguez
- Department of Biomedical and Health Sciences, University of Vermont, Burlington, VT 05405, USA; (P.D.R.); (H.P.); (S.K.)
| | - Hana Paculova
- Department of Biomedical and Health Sciences, University of Vermont, Burlington, VT 05405, USA; (P.D.R.); (H.P.); (S.K.)
| | - Sophie Kogut
- Department of Biomedical and Health Sciences, University of Vermont, Burlington, VT 05405, USA; (P.D.R.); (H.P.); (S.K.)
| | - Jessica Heath
- The University of Vermont Cancer Center, University of Vermont, Burlington, VT 05405, USA;
- Department of Biochemistry, University of Vermont, Burlington, VT 05405, USA
- Department of Pediatrics, University of Vermont, Burlington, VT 05405, USA
| | - Hilde Schjerven
- Department of Laboratory Medicine, University of California, San Francisco, CA 94143, USA;
| | - Seth Frietze
- Department of Biomedical and Health Sciences, University of Vermont, Burlington, VT 05405, USA; (P.D.R.); (H.P.); (S.K.)
- The University of Vermont Cancer Center, University of Vermont, Burlington, VT 05405, USA;
- Department of Biochemistry, University of Vermont, Burlington, VT 05405, USA
- Correspondence:
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Elevated Circular RNA PVT1 Promotes Eutopic Endometrial Cell Proliferation and Invasion of Adenomyosis via miR-145/Talin1 Axis. BIOMED RESEARCH INTERNATIONAL 2021; 2021:8868700. [PMID: 33728345 PMCID: PMC7936912 DOI: 10.1155/2021/8868700] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/14/2020] [Revised: 02/04/2021] [Accepted: 02/11/2021] [Indexed: 01/13/2023]
Abstract
Several theories on the origin of adenomyosis (ADS) have been proposed, of which the most widely accepted is the fundamental pathogenic role of uterine eutopic endometrium. Emerging evidence suggests that circular RNAs participate in the multiple tumorgenesis. The vital importance of circular RNA PVT1 (circPVT1) in the pathological progress like malignancies has been well documented. Nevertheless, its underlying correlation with ADS remains elusive yet. The purpose of this study was to investigate the expression pattern, regulatory effect, and internal mechanism of circPVT1 in ADS. qRT-PCR was performed to detect the relative mRNA expression of circPVT1, miR-145, and Talin1 in ADS endometrial tissue and cells. The protein level of Talin1 was measured by Western blot and immunochemistry. Immunofluorescence was used to identify the primary endometrial epithelial and stromal cells. circPVT1 knockdown in vitro was achieved by transfecting with specific lentivirus vector CCK-8, and colony formation assays were utilized to assess cell proliferation; meanwhile, the transwell assay was employed for evaluating cell invasion ability. By conducting bioinformatics, dual-luciferase reporter assay, or RNA immunoprecipitation (RIP) experiment, the interaction between miR-145 and circPVT1 or Talin1 was verified. Rescue experiments further determined the regulatory effect of circPVT1/miR-145/Talin1 axis. We found both circPVT1 and Talin1 were markedly upregulated in ADS endometrial tissue and cells, whereas miR-145 was decreased. Elevated expression of circPVT1 was closely related to the severity of dysmenorrhea, menorrhagia, and uterine enlargement of patients with ADS. Knockdown of circPVT1 inhibited adenomyotic epithelial and stromal cell proliferation and invasion. Further mechanistic experiments revealed that circPVT1 negatively regulated miR-145 through serving as a molecular sponge. And the facilitating effect of circPVT1 was partially reversed by miR-145. Talin1 was demonstrated to be a down target of miR-145 and indirectly affected by circPVT1. Our findings unveiled that enhanced circPVT1 may be involved in the pathogenesis of ADS via stimulating endometrial cell proliferation and invasion. The establishment of circPVT1/miR-145/Talin1 pathway might present a novel therapeutic insight for ADS.
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Liu H, Zou Y, Chen C, Tang Y, Guo J. Current Understanding of Circular RNAs in Systemic Lupus Erythematosus. Front Immunol 2021; 12:628872. [PMID: 33717154 PMCID: PMC7946848 DOI: 10.3389/fimmu.2021.628872] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2020] [Accepted: 01/18/2021] [Indexed: 12/28/2022] Open
Abstract
Systemic lupus erythematosus (SLE) is a common and potentially fatal autoimmune disease that affects multiple organs. To date, its etiology and pathogenesis remains elusive. Circular RNAs (circRNAs) are a novel class of endogenous non-coding RNAs with covalently closed loop structure. Growing evidence has demonstrated that circRNAs may play an essential role in regulation of gene expression and transcription by acting as microRNA (miRNA) sponges, impacting cell survival and proliferation by interacting with RNA binding proteins (RBPs), and strengthening mRNA stability by forming RNA-protein complexes duplex structures. The expression patterns of circRNAs exhibit tissue-specific and pathogenesis-related manner. CircRNAs have implicated in the development of multiple autoimmune diseases, including SLE. In this review, we summarize the characteristics, biogenesis, and potential functions of circRNAs, its impact on immune responses and highlight current understanding of circRNAs in the pathogenesis of SLE.
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Affiliation(s)
- Hongjiang Liu
- Department of Rheumatology and Immunology, Peking University People’s Hospital & Beijing Key Laboratory for Rheumatism Mechanism and Immune Diagnosis (BZ0135), Beijing, China
- Department of Rheumatology and Immunology, The People’s Hospital of China Three Gorges University/The First People’s Hospital of Yichang, Yichang, China
| | - Yundong Zou
- Department of Rheumatology and Immunology, Peking University People’s Hospital & Beijing Key Laboratory for Rheumatism Mechanism and Immune Diagnosis (BZ0135), Beijing, China
| | - Chen Chen
- Department of Rheumatology and Immunology, Peking University People’s Hospital & Beijing Key Laboratory for Rheumatism Mechanism and Immune Diagnosis (BZ0135), Beijing, China
| | - Yundi Tang
- Department of Rheumatology and Immunology, Peking University People’s Hospital & Beijing Key Laboratory for Rheumatism Mechanism and Immune Diagnosis (BZ0135), Beijing, China
| | - Jianping Guo
- Department of Rheumatology and Immunology, Peking University People’s Hospital & Beijing Key Laboratory for Rheumatism Mechanism and Immune Diagnosis (BZ0135), Beijing, China
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Ling Z, Fang ZG, Wu JY, Liu JJ. The depletion of Circ-PRKDC enhances autophagy and apoptosis in T-cell acute lymphoblastic leukemia via microRNA-653-5p/Reelin mediation of the PI3K/AKT/mTOR signaling pathway. Kaohsiung J Med Sci 2021; 37:392-401. [PMID: 33615686 DOI: 10.1002/kjm2.12352] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2020] [Revised: 11/26/2020] [Accepted: 12/03/2020] [Indexed: 12/23/2022] Open
Abstract
A range of circular (Circ) RNAs have been demonstrated to be of therapeutic significance for the treatment of acute lymphoblastic leukemia (ALL). Here, we investigated the mechanisms underlying the action of Circ-PRKDC and the microRNA-653-5p/Reelin (miR-653-5p/RELN) axis in T-cell ALL (T-ALL).Clinical specimens were obtained from patients with T-ALL (n = 39) and healthy controls (n = 30). In each specimen, we determined the expression levels of Circ-PRKDC, miR-653-5p, and RELN. Human T-ALL cells (Jurkat) were transfected with Circ-PRKDC- or miR-653-5p-related sequences to investigate cell proliferation, apoptosis, and autophagy. We also determined the levels of Circ-PRKDC, miR-653-5p, RELN, and signaling proteins related to phosphoinositide 3-kinase (PI3K), AKT, and mammalian target of rapamycin (mTOR). Finally, we decoded the interactions between Circ-PRKDC, miR-653-5p, and RELN. The expression levels of Circ-PRKDC and RELN were upregulated in T-ALL tissues and cells while the levels of miR-653-5p were downregulated. Thereafter, then silencing of Circ-PRKDC, or the enforced expression of miR-653-5p, repressed the expression of RELN and the activation of the PI3K/AKT/mTOR signaling pathway, thus enhancing cell autophagy and apoptosis, and disrupting cell proliferation. Circ-PRKDC acted a sponge for miR-653-5p while miR-653-5p targeted RELN. The knockdown of miR-653-5p abrogated the silencing of Circ-PRKDC-induced effects in T-ALL cells. The depletion of Circ-PRKDC elevated miR-653-5p to silence RELN-mediated PI3K/AKT/mTOR signaling activation, thereby enhancing autophagy and apoptosis in T-ALL cells.
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Affiliation(s)
- Zhang Ling
- Department of Hematology, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong, China
| | - Zhi-Gang Fang
- Department of Hematology, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong, China
| | - Jie-Yong Wu
- Department of Hematology, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong, China
| | - Jia-Jun Liu
- Department of Hematology, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong, China
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50
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The GAUGAA Motif Is Responsible for the Binding between circSMARCA5 and SRSF1 and Related Downstream Effects on Glioblastoma Multiforme Cell Migration and Angiogenic Potential. Int J Mol Sci 2021; 22:ijms22041678. [PMID: 33562358 PMCID: PMC7915938 DOI: 10.3390/ijms22041678] [Citation(s) in RCA: 38] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2020] [Revised: 01/26/2021] [Accepted: 02/04/2021] [Indexed: 12/17/2022] Open
Abstract
Circular RNAs (circRNAs) are a large class of RNAs with regulatory functions within cells. We recently showed that circSMARCA5 is a tumor suppressor in glioblastoma multiforme (GBM) and acts as a decoy for Serine and Arginine Rich Splicing Factor 1 (SRSF1) through six predicted binding sites (BSs). Here we characterized RNA motifs functionally involved in the interaction between circSMARCA5 and SRSF1. Three different circSMARCA5 molecules (Mut1, Mut2, Mut3), each mutated in two predicted SRSF1 BSs at once, were obtained through PCR-based replacement of wild-type (WT) BS sequences and cloned in three independent pcDNA3 vectors. Mut1 significantly decreased its capability to interact with SRSF1 as compared to WT, based on the RNA immunoprecipitation assay. In silico analysis through the “Find Individual Motif Occurrences” (FIMO) algorithm showed GAUGAA as an experimentally validated SRSF1 binding motif significantly overrepresented within both predicted SRSF1 BSs mutated in Mut1 (q-value = 0.0011). U87MG and CAS-1, transfected with Mut1, significantly increased their migration with respect to controls transfected with WT, as revealed by the cell exclusion zone assay. Immortalized human brain microvascular endothelial cells (IM-HBMEC) exposed to conditioned medium (CM) harvested from U87MG and CAS-1 transfected with Mut1 significantly sprouted more than those treated with CM harvested from U87MG and CAS-1 transfected with WT, as shown by the tube formation assay. qRT-PCR showed that the intracellular pro- to anti-angiogenic Vascular Endothelial Growth Factor A (VEGFA) mRNA isoform ratio and the amount of total VEGFA mRNA secreted in CM significantly increased in Mut1-transfected CAS-1 as compared to controls transfected with WT. Our data suggest that GAUGAA is the RNA motif responsible for the interaction between circSMARCA5 and SRSF1 as well as for the circSMARCA5-mediated control of GBM cell migration and angiogenic potential.
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