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Zhang Y, Shang Z, Xu S, Zhou G, Liu A. ELF5-Regulated lncRNA-TTN-AS1 Alleviates Myocardial Cell Injury via Recruiting PCBP2 to Increase CDK6 Stability in Myocardial Infarction. Mol Cell Biol 2024; 44:303-315. [PMID: 39034459 PMCID: PMC11296528 DOI: 10.1080/10985549.2024.2374083] [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: 11/15/2023] [Revised: 05/29/2024] [Accepted: 06/25/2024] [Indexed: 07/23/2024] Open
Abstract
Myocardial infarction (MI) seriously threatens the health of elderly people, and reducing myocardial injury is of great significance for the treatment of MI. LncRNA-TTN-AS1 shows protective effects on cardiomyocyte injury, while the role of TTN-AS1 in MI remains unknown. CCK8, flow cytometry, and JC-1 staining assessed cell viability, apoptosis and mitochondrial membrane potential (MMP), respectively. Cellular reactive oxygen species (ROS) and secreted lactate dehydrogenase (LDH) levels were measured. The interactions between ELF5, TTN-AS1, PCBP2 and CDK6 were explored using ChIP, luciferase reporter assay, RIP, and pull-down. The severity of MI in mice was evaluated using TTC, H&E, and TUNEL staining. The data revealed that OGD/R significantly induced ROS, mitochondrial injury and apoptosis in AC16 cells, while overexpression of ELF5 or TTN-AS1 reversed these phenomena. ELF5 transcriptionally activated TTN-AS1 through binding with its promoter. TTN-AS1 increased CDK6 stability via recruiting PCBP2. CDK6 knockdown abolished the inhibitory effects of TTN-AS1 overexpression on OGD/R-induced myocardial injury. Furthermore, overexpression of TTN-AS1 or ELF5 alleviated MI progression in mice by upregulating CDK6. Collectively, TTN-AS1 transcriptionally regulated by ELF5 alleviated myocardial apoptosis and injury during MI via recruiting PCBP2 to increase CDK6 stability, which shed new lights on exploring new strategies against MI.
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Affiliation(s)
- Yonglin Zhang
- Department of Cardiology, Binhai County People’s Hospital, Binhai, Jiangsu Province, China
| | - Zhenglu Shang
- Department of Cardiology, Wuxi Huishan District People’s Hospital, Wuxi, Jiangsu Province, China
| | - Shucan Xu
- Department of Cardiology, Binhai County People’s Hospital, Binhai, Jiangsu Province, China
| | - Guangzhi Zhou
- Department of Cardiology, Binhai County People’s Hospital, Binhai, Jiangsu Province, China
| | - Aijun Liu
- Department of Cardiology, Binhai County People’s Hospital, Binhai, Jiangsu Province, China
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Chien HT, Li CY, Su WH, Chang KC, Chen CS, Liu YT, Chen CY, Dai CY, Wang SC. Multi-omics profiling of chemotactic characteristics of brain microglia and astrocytoma. Life Sci 2023; 330:121855. [PMID: 37419413 DOI: 10.1016/j.lfs.2023.121855] [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: 04/17/2023] [Revised: 05/30/2023] [Accepted: 06/09/2023] [Indexed: 07/09/2023]
Abstract
Brain cancer is a deadly disease with low survival rates for over 70 % of patients. Therefore, there is a critical need to develop better treatment methods and strategies to improve patient outcomes. In this study, we explored the tumor microenvironment and discovered unique characteristics of microglia to interact with astrocytoma cells and promote proliferation and migration of collisions. The conditioned medium from the collisions expressed cell chemoattraction and anti-inflammatory responses. To further understand the interactions between microglia and astrocytoma cells, we used flow sorting and protein analysis found that the protein alterations were related to biogenesis in the astrocytoma cells and metabolic processes in the microglia. Both types of cells were involved in binding and activity in cell-cell interactions. Using STRING to demonstrate the protein cross-interaction between the cells. Furthermore, PHB and RDX interact with oncogenic proteins, which were significantly expressed in patients with Glioblastoma Multiforme (GBM) and low-grade glioma (LGG) according to GEPIA. To study the role of RDX in chemoattraction, the inhibitor-NSC668394 suppressed collision formation and migration in BV2 cells in vitro by down-regulating F-actin. Additionally, it suppressed macrophage infiltration in infiltrating islands in vivo of intracranial tumor-bearing mice. These findings provide evidence for the role of resident cells in mediating tumor development and invasiveness and suggest that potential interacting molecules may be a strategy for controlling tumor growth by regulating the infiltration of tumor-associated microglia in the brain tumor microenvironment.
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Affiliation(s)
- Hsin-Tung Chien
- Department of Medical Laboratory Science and Biotechnology, Center for Liquid Biopsy and Cohort Research, Kaohsiung Medical University, Kaohsiung 80708, Taiwan
| | - Chia-Yang Li
- Graduate Institute of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung 80708, Taiwan; Department of Biological Science and Technology, National Pingtung University of Science and Technology, Pingtung 91201, Taiwan; Department of Medical Research, Kaohsiung Medical University Hospital, Kaohsiung 80756, Taiwan.
| | - Wen-Hsiu Su
- Department of Medical Laboratory Science and Biotechnology, Center for Liquid Biopsy and Cohort Research, Kaohsiung Medical University, Kaohsiung 80708, Taiwan
| | - Kun-Che Chang
- Department of Ophthalmology, Louis J. Fox Center for Vision Restoration, University of Pittsburgh School of Medicine, Pittsburgh, PA 15213, USA.
| | - Chi-Sheng Chen
- Department of Medical Laboratory Science and Biotechnology, Center for Liquid Biopsy and Cohort Research, Kaohsiung Medical University, Kaohsiung 80708, Taiwan
| | - Yi-Ting Liu
- Department of Medical Laboratory Science and Biotechnology, Center for Liquid Biopsy and Cohort Research, Kaohsiung Medical University, Kaohsiung 80708, Taiwan
| | - Chih-Yi Chen
- Department of Medical Laboratory Science and Biotechnology, Center for Liquid Biopsy and Cohort Research, Kaohsiung Medical University, Kaohsiung 80708, Taiwan
| | - Chia-Yen Dai
- Hepatobiliary Division, Department of Internal Medicine, Kaohsiung Medical University Hospital, Kaohsiung 80756, Taiwan; College of Medicine and Center of Excellence for Metabolic Associated Fatty Liver Disease, National Sun Yat-sen University, Kaohsiung, Taiwan.
| | - Shu-Chi Wang
- Department of Medical Laboratory Science and Biotechnology, Center for Liquid Biopsy and Cohort Research, Kaohsiung Medical University, Kaohsiung 80708, Taiwan; Graduate Institute of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung 80708, Taiwan; Department of Medical Research, Kaohsiung Medical University Hospital, Kaohsiung 80756, Taiwan; College of Medicine and Center of Excellence for Metabolic Associated Fatty Liver Disease, National Sun Yat-sen University, Kaohsiung, Taiwan; Institute of precision medicine, National Sun Yat-Sen University, Kaohsiung 80424, Taiwan.
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Martinelli M, Aguilar G, Lee DS, Kromer A, Nguyen N, Wilkins BJ, Akimova T, Beier UH, Ghanem LR. The poly(C)-binding protein Pcbp2 is essential for CD4 + T cell activation and proliferation. iScience 2022; 26:105860. [PMID: 36632062 PMCID: PMC9826892 DOI: 10.1016/j.isci.2022.105860] [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: 06/16/2022] [Revised: 11/16/2022] [Accepted: 12/18/2022] [Indexed: 12/24/2022] Open
Abstract
The RNA-binding protein Pcbp2 is widely expressed in the innate and adaptive immune systems and is essential for mouse development. To determine whether Pcbp2 is required for CD4+ T cell development and function, we derived mice with conditional Pcbp2 deletion in CD4+ T cells and assessed their overall phenotype and proliferative responses to activating stimuli. We found that Pcbp2 is essential for T conventional cell (Tconv) proliferation, working through regulation of co-stimulatory signaling. Pcbp2 deficiency in the CD4+ lineage did not impact Treg abundance in vivo or function in vitro. In addition, our data demonstrate a clear association between Pcbp2 control of Runx1 exon 6 splicing in CD4+ T cells and a specific role for Pcbp2 in the maintenance of peripheral CD4+ lymphocyte population size. Last, we show that Pcbp2 function is required for optimal in vivo Tconv cell activation in a T cell adoptive transfer colitis model system.
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Affiliation(s)
- Massimo Martinelli
- Division of Gastroenterology, Hepatology and Nutrition Division, The Children’s Hospital of Philadelphia, Philadelphia, PA 19104, USA,Department of Translational Medical Science, Section of Pediatrics, University of Naples “Federico II”, Naples 80131, Italy
| | - Gabrielle Aguilar
- Division of Gastroenterology, Hepatology and Nutrition Division, The Children’s Hospital of Philadelphia, Philadelphia, PA 19104, USA
| | - David S.M. Lee
- Department of Genetics, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA 19104, USA,Institute for Biomedical Informatics, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Andrew Kromer
- Division of Gastroenterology, Hepatology and Nutrition Division, The Children’s Hospital of Philadelphia, Philadelphia, PA 19104, USA
| | - Nhu Nguyen
- Division of Gastroenterology, Hepatology and Nutrition Division, The Children’s Hospital of Philadelphia, Philadelphia, PA 19104, USA
| | - Benjamin J. Wilkins
- Division of Anatomic Pathology, The Children’s Hospital of Philadelphia, Philadelphia, PA 19104, USA,Department of Pathology and Laboratory Medicine, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Tatiana Akimova
- Department of Pathology and Laboratory Medicine, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Ulf H. Beier
- Division of Nephrology, The Children’s Hospital of Philadelphia, Philadelphia, PA 19104, USA
| | - Louis R. Ghanem
- Division of Gastroenterology, Hepatology and Nutrition Division, The Children’s Hospital of Philadelphia, Philadelphia, PA 19104, USA,Department of Pediatrics, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA 19104, USA,Corresponding author
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Chen X, Yu M, Xu W, Kun P, Wan W, Yuhong X, Ye J, Liu Y, Luo J. PCBP2 Reduced Oxidative Stress-Induced Apoptosis in Glioma through cGAS/STING Pathway by METTL3-Mediated m6A Modification. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2022; 2022:9049571. [PMID: 36267817 PMCID: PMC9578808 DOI: 10.1155/2022/9049571] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/02/2022] [Revised: 08/24/2022] [Accepted: 08/26/2022] [Indexed: 11/21/2022]
Abstract
Purpose The most prevalent primary malignant tumor of CNS is glioma, which has a dismal prognosis. The theory of oxidative stress is one of the important theories in the study of its occurrence and development mechanism. In this study, the impacts of PCBP2 on glioma sufferers and the possible mechanisms were examined. Methods Patients with glioma were obtained from May 2017 to July 2018. Quantitative PCR, microarray analysis, western blot analysis, and immunofluorescence were used in this experiment. Results PCBP2 mRNA expression level and protein expression in patients with glioma were upregulated compared with paracancerous tissue. OS and DFS of PCBP2 low expression in patients with glioma were higher than those of PCBP2 high expression. PCBP2 promoted the progression and metastasis of glioma. PCBP2 reduced oxidative stress-induced apoptosis of glioma. PCBP2 suppressed the cGAS/STING pathway of glioma. PCBP2 protein interlinked with cGAS and cGAS was one target for PCBP2. METTL3-mediated m6A modification increases PCBP2 stability. Conclusion Along the cGAS-STING signal pathway, PCBP2 decreased the apoptosis that oxidative stress-induced glioma caused, which might be a potential target to suppress oxidative stress-induced apoptosis of glioma.
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Affiliation(s)
- Xiang Chen
- Department of Rehabilitation Medicine, The Second Affiliated Hospital of Nanchang University, 1 Minde Road, Nanchang City, Jiangxi Province, China
| | - Mingchuan Yu
- Department of Rehabilitation Medicine, The Second Affiliated Hospital of Nanchang University, 1 Minde Road, Nanchang City, Jiangxi Province, China
| | - Wei Xu
- Department of Gastrointestinal Surgery, The Second Affiliated Hospital of Nanchang University, China
| | - Peng Kun
- Department of Orthopedics, The Second Affiliated Hospital of Nanchang University, China
| | - Wenbing Wan
- Department of Orthopedics, The Second Affiliated Hospital of Nanchang University, China
| | - Xiao Yuhong
- Department of Rehabilitation Medicine, The Second Affiliated Hospital of Nanchang University, 1 Minde Road, Nanchang City, Jiangxi Province, China
| | - Jing Ye
- Department of Rehabilitation Medicine, The Second Affiliated Hospital of Nanchang University, 1 Minde Road, Nanchang City, Jiangxi Province, China
| | - Yu Liu
- Department of Rehabilitation Medicine, The Second Affiliated Hospital of Nanchang University, 1 Minde Road, Nanchang City, Jiangxi Province, China
| | - Jun Luo
- Department of Rehabilitation Medicine, The Second Affiliated Hospital of Nanchang University, 1 Minde Road, Nanchang City, Jiangxi Province, China
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Mitok KA, Keller MP, Attie AD. Sorting through the extensive and confusing roles of sortilin in metabolic disease. J Lipid Res 2022; 63:100243. [PMID: 35724703 PMCID: PMC9356209 DOI: 10.1016/j.jlr.2022.100243] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2021] [Revised: 06/10/2022] [Accepted: 06/13/2022] [Indexed: 01/06/2023] Open
Abstract
Sortilin is a post-Golgi trafficking receptor homologous to the yeast vacuolar protein sorting receptor 10 (VPS10). The VPS10 motif on sortilin is a 10-bladed β-propeller structure capable of binding more than 50 proteins, covering a wide range of biological functions including lipid and lipoprotein metabolism, neuronal growth and death, inflammation, and lysosomal degradation. Sortilin has a complex cellular trafficking itinerary, where it functions as a receptor in the trans-Golgi network, endosomes, secretory vesicles, multivesicular bodies, and at the cell surface. In addition, sortilin is associated with hypercholesterolemia, Alzheimer's disease, prion diseases, Parkinson's disease, and inflammation syndromes. The 1p13.3 locus containing SORT1, the gene encoding sortilin, carries the strongest association with LDL-C of all loci in human genome-wide association studies. However, the mechanism by which sortilin influences LDL-C is unclear. Here, we review the role sortilin plays in cardiovascular and metabolic diseases and describe in detail the large and often contradictory literature on the role of sortilin in the regulation of LDL-C levels.
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Affiliation(s)
- Kelly A Mitok
- Department of Biochemistry, University of Wisconsin-Madison, Madison, WI, USA
| | - Mark P Keller
- Department of Biochemistry, University of Wisconsin-Madison, Madison, WI, USA
| | - Alan D Attie
- Department of Biochemistry, University of Wisconsin-Madison, Madison, WI, USA.
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3'untranslated regions of tumor suppressor genes evolved specific features to favor cancer resistance. Oncogene 2022; 41:3278-3288. [PMID: 35523946 DOI: 10.1038/s41388-022-02343-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2021] [Revised: 04/26/2022] [Accepted: 04/28/2022] [Indexed: 11/08/2022]
Abstract
Cancer-related genes have evolved specific genetic and genomic features to favor tumor suppression. Previously we reported that tumor suppressor genes (TSGs) acquired high promoter CpG dinucleotide frequencies during evolution to maintain high expression in normal tissues and resist cancer-specific downregulation. In this study, we investigated whether 3'untranslated regions (3'UTRs) of TSGs have evolved specific features to carry out similar functions. We found that 3'UTRs of TSGs, especially those involved in multiple histological types and pediatric cancers, are longer than those of non-cancer genes. 3'UTRs of TSGs also exhibit higher density of binding sites for RNA-binding proteins (RBPs), particularly those having high affinities to C-rich motifs. Both longer 3'UTR length and RBP binding sites enrichment are correlated with higher gene expression in normal tissues across tissue types. Moreover, both features together with the correlated N6-methyladenosine modification and the extent of protein-protein interactions are positively associated with the ability of TSGs to resist cancer-specific downregulation. These results were successfully validated with independent datasets. Collectively, these findings indicate that TSGs have evolved longer 3'UTR with increased propensity to RBP binding, N6-methyladenosine modification and protein-protein interactions for optimizing their tumor-suppressing functions.
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