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Li X, Han Z, Li H. Hif3α Plays Key Roles in the Progression of Alzheimer's Disease Caused by Circadian Rhythm Disruption through Regulating the m 6A/KDM3A/TGF-β1 Axis. BIOLOGY 2024; 13:412. [PMID: 38927292 PMCID: PMC11201003 DOI: 10.3390/biology13060412] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/13/2024] [Revised: 05/31/2024] [Accepted: 06/03/2024] [Indexed: 06/28/2024]
Abstract
Disrupted circadian rhythms are associated with the onset of chronic diseases and impairments, including cancer, diabetes, and hypertension. However, whether circadian disruptions accelerate the progression of Alzheimer's disease and the respective pathway remains unclear. In this study, we constructed animal models using male C57BL/6N and APP/PS1 mice. Irregular illumination during sleeping hours was administered to the mice in our intervention groups to consistently disrupt their circadian rhythms. The impact of the intervention was evaluated through body weight tracking, cerebral index determination, histopathological staining, and biochemical marker analysis. Transcriptomic sequencing identified critical genes, with the data subsequently validated using RNA m6A detection and site analysis. The evaluations revealed that circadian disruptions impaired normal weight gain, liver and kidney functions, neuronal cells, and overall brain function. Transcriptomic sequencing data revealed a trend of elevating expression of Hif3α mRNA in the intervention groups. Further analysis of specific gene sites revealed that m6A methylation of the Hif3α gene at m6A site 3632 primarily drove the observed variations in HIF3A protein expression in our model. Furthermore, the expression of proteins in PC12 cells, N2a cells, and mice brains validated that an increase in HIF3A expression decreased KDM3A and TGF-β1 protein expression. Our study reveals a hitherto unknown pathway through which the disruption of circadian rhythms, by triggering m6A methylation at m6A site 3632 in the Hif3α gene, leads to the initiation and acceleration of AD. These findings provide valuable insights and guidelines for treating AD patients and enhancing caregiving by professionals.
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Affiliation(s)
- Xinrui Li
- Beijing National Day School, Beijing 100062, China;
| | - Zhengkun Han
- Beijing Key Laboratory of Food Processing and Safety in Forest, College of Biological Sciences and Technology, Beijing Forestry University, Beijing 100083, China;
| | - Huiying Li
- Beijing Key Laboratory of Food Processing and Safety in Forest, College of Biological Sciences and Technology, Beijing Forestry University, Beijing 100083, China;
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2
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Leonetti AM, Galluzzo IR, McLean TAD, Stefanelli G, Ramnaraign F, Holm S, Winston SM, Reeves IL, Brimble MA, Walters BJ. The role of the m6A/m demethylase FTO in memory is both task and sex-dependent in mice. Neurobiol Learn Mem 2024; 210:107903. [PMID: 38403011 DOI: 10.1016/j.nlm.2024.107903] [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: 11/03/2023] [Revised: 02/07/2024] [Accepted: 02/21/2024] [Indexed: 02/27/2024]
Abstract
Formation of long-term memories requires learning-induced changes in both transcription and translation. Epitranscriptomic modifications of RNA recently emerged as critical regulators of RNA dynamics, whereby adenosine methylation (m6A) regulates translation, mRNA stability, mRNA localization, and memory formation. Prior work demonstrated a pro-memory phenotype of m6A, as loss of m6A impairs and loss of the m6A/m demethylase FTO improves memory formation. Critically, these experiments focused exclusively on aversive memory tasks and were only performed in male mice. Here we show that the task type and sex of the animal alter effects of m6A on memory, whereby FTO-depletion impaired object location memory in male mice, in contrast to the previously reported beneficial effects of FTO depletion on aversive memory. Additionally, we show that female mice have no change in performance after FTO depletion, demonstrating that sex of the mouse is a critical variable for understanding how m6A contributes to memory formation. Our study provides the first evidence for FTO regulation of non-aversive spatial memory and sexspecific effects of m6A, suggesting that identification of differentially methylated targets in each sex and task will be critical for understanding how epitranscriptomic modifications regulate memory.
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Affiliation(s)
- Amanda M Leonetti
- Department of Biology, University of Toronto Mississauga, Mississauga, ON, L5L 1C6, Canada; Department of Cell & Systems Biology, University of Toronto, Toronto, ON, M5S 3G3, Canada; Department of Psychology, University of Toronto Mississauga, Mississauga, ON, L5L 1C6, Canada; Department of Biological Sciences, Brock University, 1812 Sir Isaac Brock Way, St. Catharines, ON, L2S 3A1, Canada.
| | - Isabella R Galluzzo
- Department of Cell & Systems Biology, University of Toronto, Toronto, ON, M5S 3G3, Canada.
| | - Timothy A D McLean
- Department of Cell & Systems Biology, University of Toronto, Toronto, ON, M5S 3G3, Canada.
| | - Gilda Stefanelli
- Department of Biology, University of Ottawa, Ottawa, Marie-Curie Private, ON K1N 9A, Canada.
| | - Fiona Ramnaraign
- Department of Biology, University of Toronto Mississauga, Mississauga, ON, L5L 1C6, Canada.
| | - Samuel Holm
- Department of Biology, University of Toronto Mississauga, Mississauga, ON, L5L 1C6, Canada.
| | - Stephen M Winston
- Department of Surgery, St Jude Children's Research Hospital, 262 Danny Thomas Place, Memphis, TN 38105, USA; Graduate School of Biomedical Sciences, St. Jude Children's Research Hospital, Memphis, TN 38105, USA.
| | - Isaiah L Reeves
- Department of Surgery, St Jude Children's Research Hospital, 262 Danny Thomas Place, Memphis, TN 38105, USA; Graduate School of Biomedical Sciences, St. Jude Children's Research Hospital, Memphis, TN 38105, USA.
| | - Mark A Brimble
- Dept of Host-Microbe Interactions, St Jude Children's Research Hospital, 262 Danny Thomas Place, Memphis, TN, 38105, USA.
| | - Brandon J Walters
- Department of Biology, University of Toronto Mississauga, Mississauga, ON, L5L 1C6, Canada; Department of Cell & Systems Biology, University of Toronto, Toronto, ON, M5S 3G3, Canada.
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3
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Cao Z, An Y, Lu Y. Altered N6-Methyladenosine Modification Patterns and Transcript Profiles Contributes to Cognitive Dysfunction in High-Fat Induced Diabetic Mice. Int J Mol Sci 2024; 25:1990. [PMID: 38396669 PMCID: PMC10889299 DOI: 10.3390/ijms25041990] [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: 12/15/2023] [Revised: 01/18/2024] [Accepted: 01/25/2024] [Indexed: 02/25/2024] Open
Abstract
N6-methyladenosine (m6A) constitutes the paramount post-transcriptional modification within eukaryotic mRNA. This modification is subjected to stimulus-dependent regulation within the central nervous system of mammals, being influenced by sensory experiences, learning processes, and injuries. The patterns of m6A methylation within the hippocampal region of diabetes cognitive impairment (DCI) has not been investigated. A DCI model was established by feeding a high-fat diet to C57BL/6J mice. m6A and RNA sequencing was conducted to profile the m6A-tagged transcripts in the hippocampus. Methylated RNA immunoprecipitation with next-generation sequencing and RNA sequencing analyses yielded differentially m6A-modified and expressed genes in the hippocampus of DCI mice, which were enriched in pathways involving synaptic transmission and axonal guidance. Mechanistic analyses revealed a remarkable change in m6A modification levels through alteration of the mRNA expression of m6A methyltransferases (METTL3 and METTL14) and demethylase (FTO) in the hippocampus of DCI mice. We identified a co-mediated specific RNA regulatory strategy that broadens the epigenetic regulatory mechanism of RNA-induced neurodegenerative disorders associated with metabolic and endocrine diseases.
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Affiliation(s)
- Zhaoming Cao
- School of Nursing, Peking University, Beijing 100191, China;
| | - Yu An
- Endocrinology Department, Beijing Chaoyang Hospital, Capital Medical University, Beijing 100020, China;
| | - Yanhui Lu
- School of Nursing, Peking University, Beijing 100191, China;
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Wu X, Wu C, Zhou T. No significant change of N 6 -methyladenosine modification landscape in mouse brain after morphine exposure. Brain Behav 2024; 14:e3350. [PMID: 38376052 PMCID: PMC10757896 DOI: 10.1002/brb3.3350] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/26/2023] [Revised: 10/12/2023] [Accepted: 11/20/2023] [Indexed: 02/21/2024] Open
Abstract
OBJECTIVES N6 -methyladenosine (m6 A) plays a crucial role in regulating neuroplasticity and different brain functions at the posttranscriptional level. However, it remains unknown whether m6 A modification is involved in acute and chronic morphine exposure. MATERIALS AND METHODS In this study, we conducted a direct comparison of m6 A levels and mRNA expression of m6 A-associated factors between morphine-treated and nontreated C57BL/6 wild-type mice. We established animal models of both acute and chronic morphine treatment and confirmed the rewarding effects of chronic morphine treatment using the conditioned place preference (CPP) assay. The activation status of different brain regions in response to morphine was assessed by c-fos staining. To assess overall m6 A modification levels, we employed the m6 A dot blot assay, while mRNA levels of m6 A-associated proteins were measured using a quantitative polymerase chain reaction (qPCR) assay. These analyses were performed to investigate whether and how m6 A modification and m6 A-associated protein expression will change following morphine exposure. RESULTS The overall m6 A methylation and mRNA levels of m6 A-associated proteins were not significantly altered in brain regions that were either activated or not activated during acute morphine stimulation. Similarly, the overall m6 A modification and mRNA levels of m6 A-associated proteins remained unaffected in several key brain regions associated with reward following chronic morphine exposure. CONCLUSION This study showed that the overall m6 A modification level and mRNA expression levels of m6 A-associated factors were not affected after acute and chronic morphine exposure in different brain regions, indicating m6 A modification may not be involved in brain response to morphine exposure.
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Affiliation(s)
- Xiaoli Wu
- Shenzhen Neher Neural Plasticity Laboratory, Shenzhen Key Laboratory of Drug Addiction, the Brain Cognition and Brain Disease Institute, Shenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhenChina
- University of Chinese Academy of SciencesBeijingChina
- Shenzhen‐Hong Kong Institute of Brain Science‐Shenzhen Fundamental Research InstitutionsShenzhenChina
| | - Cuiting Wu
- Shenzhen Neher Neural Plasticity Laboratory, Shenzhen Key Laboratory of Drug Addiction, the Brain Cognition and Brain Disease Institute, Shenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhenChina
- University of Chinese Academy of SciencesBeijingChina
- Shenzhen‐Hong Kong Institute of Brain Science‐Shenzhen Fundamental Research InstitutionsShenzhenChina
| | - Tao Zhou
- Shenzhen Neher Neural Plasticity Laboratory, Shenzhen Key Laboratory of Drug Addiction, the Brain Cognition and Brain Disease Institute, Shenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhenChina
- Shenzhen‐Hong Kong Institute of Brain Science‐Shenzhen Fundamental Research InstitutionsShenzhenChina
- CAS Key Laboratory of Brain Connectome and Manipulation, Faculty of Life and Health Sciences, the Brain Cognition and Brain Disease Institute, Shenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhenChina
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ALASAR AAKÇAÖZ, SAĞLAM B, VATANSEVER İERDOĞAN, AKGÜL B. Expression patterns of m 6A RNA methylation regulators under apoptotic conditions in various human cancer cell lines. Turk J Biol 2023; 48:24-34. [PMID: 38665783 PMCID: PMC11042863 DOI: 10.55730/1300-0152.2679] [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: 08/20/2023] [Revised: 02/27/2024] [Accepted: 12/14/2023] [Indexed: 04/28/2024] Open
Abstract
Background/aim Cancer is a complex disease that involves both genetic and epigenetic factors. While emerging evidence clearly suggests that changes in epitranscriptomics play a crucial role in cancer pathogenesis, a comprehensive understanding of the writers, erasers, and readers of epitranscriptomic processes, particularly under apoptotic conditions remains lacking. The aim of this study was to uncover the changes in the expression of m6A RNA modifiers under apoptotic conditions across various cancer cell lines. Materials and methods Initially, we quantified the abundance of m6A RNA modifiers in cervical (HeLa and ME180), breast (MCF7 and MDA-MB-231), lung (A549 and H1299), and colon (Caco-2 and HCT116) cancer cell lines using qPCR. Subsequently, we induced apoptosis using cisplatin and tumor necrosis factor-alpha (TNF-α) to activate intrinsic and extrinsic pathways, respectively, and assessed apoptosis rates via flow cytometry. Further, we examined the transcript abundance of m6A RNA modifiers under apoptotic conditions in cervical, breast, and lung cancer cell lines using qPCR. Results Overall, treatment with cisplatin increased the abundance of m6A modifiers, whereas TNF-α treatment decreased their expression in cervical, breast, and lung cancer cell lines. Specifically, cisplatin-induced apoptosis, but not TNF-α-mediated apoptosis, resulted in decreased abundance of METTL14 and FTO transcripts. Additionally, cisplatin treatment drastically reduced the abundance of IGF2BP2 and IGF2BP3 readers. Conclusion These results suggest that the differential response of cancer cells to apoptotic inducers may be partially attributed to the expression of m6A RNA modifiers.
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Affiliation(s)
- Azime AKÇAÖZ ALASAR
- Department of Molecular Biology and Genetics, Noncoding RNA Laboratory, İzmir Institute of Technology, İzmir,
Turkiye
| | - Buket SAĞLAM
- Department of Molecular Biology and Genetics, Noncoding RNA Laboratory, İzmir Institute of Technology, İzmir,
Turkiye
| | - İpek ERDOĞAN VATANSEVER
- Department of Molecular Biology and Genetics, Noncoding RNA Laboratory, İzmir Institute of Technology, İzmir,
Turkiye
| | - Bünyamin AKGÜL
- Department of Molecular Biology and Genetics, Noncoding RNA Laboratory, İzmir Institute of Technology, İzmir,
Turkiye
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Chang R, Zhu S, Peng J, Lang Z, Zhou X, Liao H, Zou J, Zeng P, Tan S. The hippocampal FTO-BDNF-TrkB pathway is required for novel object recognition memory reconsolidation in mice. Transl Psychiatry 2023; 13:349. [PMID: 37963912 PMCID: PMC10645923 DOI: 10.1038/s41398-023-02647-4] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/08/2023] [Revised: 10/24/2023] [Accepted: 11/01/2023] [Indexed: 11/16/2023] Open
Abstract
Memory reconsolidation refers to the process by which the consolidated memory was restored after reactivation (RA). Memory trace becomes labile after reactivation and inhibition of memory reconsolidation may disrupt or update the original memory trace, which provided a new strategy for the treatment of several psychiatric diseases, such as drug addiction and post-traumatic stress disorder. Fat mass and obesity-associated gene (FTO) is a novel demethylase of N6-methyladenosine (m6A) and it has been intensively involved in learning and memory. However, the role of FTO in memory reconsolidation has not been determined. In the present study, the function of FTO in memory reconsolidation was investigated in the novel object recognition (NOR) model in mice. The results showed that RA of NOR memory increased hippocampal FTO expression in a time-dependent manner, while FTO inhibitor meclofenamic acid (MA) injected immediately, but not 6 h after RA disrupted NOR memory reconsolidation. MA downregulated BDNF expression during NOR memory reconsolidation in the hippocampus, while the TrkB agonist 7,8-Dihydroxyflavone (7,8-DHF) reversed the disruptive effects of MA on NOR memory reconsolidation. Furthermore, overexpression of FTO increased BDNF expression via decreasing mRNA m6A in HT22 cells. Taken together, these results indicate that FTO may up-regulate the BDNF-TrkB pathway to promote NOR memory reconsolidation through m6A modification.
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Affiliation(s)
- Rui Chang
- Department of Histology and Embryology, School of Basic Medicine, Hengyang Medical School, University of South China, Hengyang, China
| | - Shanshan Zhu
- Department of Histology and Embryology, School of Basic Medicine, Hengyang Medical School, University of South China, Hengyang, China
| | - Jionghong Peng
- Department of Histology and Embryology, School of Basic Medicine, Hengyang Medical School, University of South China, Hengyang, China
| | - Zhenyi Lang
- Department of Histology and Embryology, School of Basic Medicine, Hengyang Medical School, University of South China, Hengyang, China
| | - Xinyu Zhou
- Department of Histology and Embryology, School of Basic Medicine, Hengyang Medical School, University of South China, Hengyang, China
| | - Hailin Liao
- Department of Histology and Embryology, School of Basic Medicine, Hengyang Medical School, University of South China, Hengyang, China
| | - Ju Zou
- Department of Histology and Embryology, School of Basic Medicine, Hengyang Medical School, University of South China, Hengyang, China
| | - Peng Zeng
- Department of Histology and Embryology, School of Basic Medicine, Hengyang Medical School, University of South China, Hengyang, China.
| | - Sijie Tan
- Department of Histology and Embryology, School of Basic Medicine, Hengyang Medical School, University of South China, Hengyang, China.
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7
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Yang J, Shangguan Q, Xie G, Yang M, Sheng G. M6A regulator methylation patterns and characteristics of immunity in acute ST-segment elevation myocardial infarction. Sci Rep 2023; 13:15688. [PMID: 37735234 PMCID: PMC10514189 DOI: 10.1038/s41598-023-42959-5] [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: 04/04/2023] [Accepted: 09/16/2023] [Indexed: 09/23/2023] Open
Abstract
M6A methylation is the most prevalent and abundant RNA modification in mammals. Although there are many studies on the regulatory role of m6A methylation in the immune response, the m6A regulators in the pathogenesis of acute ST-segment elevation myocardial infarction (STEMI) remain unclear. We comprehensively analysed the role of m6A regulators in STEMI and built a predictive model, revealing the relationship between m6A methylations and the immune microenvironment. Differential analysis revealed that 18 of 24 m6A regulators were significantly differentially expressed, and there were substantial interactions between the m6A regulator. Then, we established a classifier and nomogram model based on 6 m6A regulators, which can easily distinguish the STEMI and control samples. Finally, two distinct m6A subtypes were obtained and significantly differentially expressed in terms of infiltrating immunocyte abundance, immune reaction activity and human leukocyte antigen genes. Three hub m6A phenotype related genes (RAC2, RELA, and WAS) in the midnightblue module were identified by weighted gene coexpression network analysis, and were associated with immunity. These findings suggest that m6A modification and the immune microenvironment play a key role in the pathogenesis of STEMI.
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Affiliation(s)
- Jingqi Yang
- Department of Cardiovascular Medicine, Jiangxi Provincial People's Hospital, The First Affiliated Hospital of Nanchang Medical College, 152 Aiguo Road, Nanchang, China
| | - Qing Shangguan
- Department of Cardiovascular Medicine, Jiangxi Provincial People's Hospital, The First Affiliated Hospital of Nanchang Medical College, 152 Aiguo Road, Nanchang, China
| | - Guobo Xie
- Department of Cardiovascular Medicine, Jiangxi Provincial People's Hospital, The First Affiliated Hospital of Nanchang Medical College, 152 Aiguo Road, Nanchang, China
| | - Ming Yang
- Department of Cardiovascular Medicine, Jiangxi Provincial People's Hospital, The First Affiliated Hospital of Nanchang Medical College, 152 Aiguo Road, Nanchang, China.
| | - Guotai Sheng
- Department of Cardiovascular Medicine, Jiangxi Provincial People's Hospital, The First Affiliated Hospital of Nanchang Medical College, 152 Aiguo Road, Nanchang, China
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8
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Ma B, Cao P, Zhang L, Zhu H, Ye X, Wang L, Chen L. YTHDC2 inhibits rat bone mesenchymal stem cells osteogenic differentiation by accelerating RUNX2 mRNA degradation via m6A methylation. Heliyon 2023; 9:e18876. [PMID: 37636387 PMCID: PMC10457424 DOI: 10.1016/j.heliyon.2023.e18876] [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: 12/27/2021] [Revised: 07/17/2023] [Accepted: 08/01/2023] [Indexed: 08/29/2023] Open
Abstract
As the most abundant internal mRNA modification, N6-methyladenosine (m6A) RNA methylation has been found to influence many biological events including bone mesenchymal stem cells (BMSCs) osteogenic differentiation. YTH N6-methyladenosine RNA binding protein C2 (YTHDC2) is an m6A reading protein with the ability to mediate the decay of combined methylated mRNA, however its role in BMSCs osteogenic differentiation remains unknown. In this study, we first found an increase of RUNX family transcription factor 2 (RUNX2) expression and a decrease of YTHDC2 expression during the process of BMSCs osteogenic differentiation. Furthermore, we transfected BMSCs with YTHDC2 interference fragment, resulting in an increased content of RUNX2 mRNA and protein inside BMSCs. Finally, through RNA Immunoprecipitation experiments, we confirmed that YTHDC2 protein can bind to RUNX2 mRNA and accelerate its decomposition. Moreover, the immunofluorescence staining also showed a negative correlation between YTHDC2 and RUNX2. In conclusion, during BMSCs osteogenic differentiation, YTHDC2 protein showed decreased expression, resulting in a higher level of RUNX2 (mRNA and protein) expression inside cells, indicating YTHDC2 as a promising molecular target for the regulation of BMSCs osteogenic differentiation.
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Affiliation(s)
- Bo Ma
- Department of Trauma and Orthopedics, Peking University People's Hospital, Beijing, PR China
- Department of Orthopedics, The First Affiliated Hospital of Soochow University, Orthopedic Institute, Soochow University, Suzhou, Jiangsu, 215006, PR China
| | - Pei Cao
- Nankai University School of Medicine, Tianjin, PR China
- Department of General Surgery, The First Affiliated Hospital of Soochow University, Suzhou, 215006, Jiangsu Province, PR China
| | - Lichen Zhang
- Department of Orthopedics, The First Affiliated Hospital of Soochow University, Orthopedic Institute, Soochow University, Suzhou, Jiangsu, 215006, PR China
| | - Hongyi Zhu
- Department of Orthopedics, The First Affiliated Hospital of Soochow University, Orthopedic Institute, Soochow University, Suzhou, Jiangsu, 215006, PR China
| | - Xuwen Ye
- Department of Orthopedics, The First Affiliated Hospital of Soochow University, Orthopedic Institute, Soochow University, Suzhou, Jiangsu, 215006, PR China
| | - Lingjun Wang
- Department of Orthopedics, The First Affiliated Hospital of Soochow University, Orthopedic Institute, Soochow University, Suzhou, Jiangsu, 215006, PR China
| | - Liang Chen
- Department of Orthopedics, The First Affiliated Hospital of Soochow University, Orthopedic Institute, Soochow University, Suzhou, Jiangsu, 215006, PR China
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Ai S, Li D, Gu X, Xu Y, Wang Y, Wang HL, Chen XT. Profile of N6-methyladenosine of Pb-exposed neurons presents epitranscriptomic alterations in PI3K-AKT pathway-associated genes. Food Chem Toxicol 2023:113821. [PMID: 37269892 DOI: 10.1016/j.fct.2023.113821] [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: 02/22/2023] [Revised: 04/21/2023] [Accepted: 05/08/2023] [Indexed: 06/05/2023]
Abstract
Lead (Pb) is a pervasive heavy metal with multi-organ toxicity. However, the molecular mechanisms of Pb-induced neurotoxicity are not fully understood. The dynamics of N6-methylademine (m6A) is an emerging regulatory mechanism for gene expression, which is closely related to nervous system diseases. To elucidate the association between m6A modification and Pb-mediated neurotoxicity, primary hippocampal neurons exposed to 5 μM Pb for 48 h were used as the paradigm neurotoxic model in this study. According to the results, Pb exposure reprogrammed the transcription spectrum. Simultaneously, Pb exposure remodeled the transcriptome-wide distribution of m6A while disrupting the overall level of m6A in cellular transcripts. United analysis of MeRIP-Seq and RNA-Seq was applied to further identify the core genes whose expression levels are regulated by m6A in the process of lead-induced nerve injury. GO and KEGG analysis unveiled that the modified transcripts were overrepresented by the PI3K-AKT pathway. Mechanically, we elucidated the regulatory role of the methyltransferase like3 (METTL3) in the process of lead-induced neurotoxicity and the downregulation of the PI3K-AKT pathway. In conclusion, our novel findings shed new light on the functional roles of m6A modification in the expressional alternations of downstream transcripts caused by lead, providing an innovative molecular basis to explain Pb neurotoxicity.
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Affiliation(s)
- Shu Ai
- School of Food and Biological Engineering, Hefei University of Technology, Hefei, Anhui, PR China
| | - Danyang Li
- School of Food and Biological Engineering, Hefei University of Technology, Hefei, Anhui, PR China
| | - Xiaozhen Gu
- School of Food and Biological Engineering, Hefei University of Technology, Hefei, Anhui, PR China
| | - Yi Xu
- School of Food and Biological Engineering, Hefei University of Technology, Hefei, Anhui, PR China
| | - Yi Wang
- School of Pharmacy, Anhui Medical University, Hefei, Anhui, PR China
| | - Hui-Li Wang
- School of Food and Biological Engineering, Hefei University of Technology, Hefei, Anhui, PR China.
| | - Xiang-Tao Chen
- School of Pharmacy, Anhui Medical University, Hefei, Anhui, PR China.
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10
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Hu W, Xie H, Zeng Y, Pei P, Zhan X, Wang S, Wang Z. N6-methyladenosine participates in mouse hippocampus neurodegeneration via PD-1/PD-L1 pathway. Front Neurosci 2023; 17:1145092. [PMID: 37234260 PMCID: PMC10206131 DOI: 10.3389/fnins.2023.1145092] [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: 01/15/2023] [Accepted: 04/20/2023] [Indexed: 05/27/2023] Open
Abstract
Developmental abnormalities and hippocampal aging leads to alteration in cognition. In the brain, N6-methyladenosine (m6A) is a common and reversible mRNA alteration that is essential for both neurodevelopment and neurodegeneration. However, its function in the postnatal hippocampus and the specific mechanisms regulating hippocampus-related neurodegeneration still awaits elucidate. We identified dynamic m6A modifications in postnatal hippocampus at different stages (at 10 days postnatally, and at 11 and 64 weeks of age). m6A shows a definite cell-specific methylation profile and m6A modification displays temporal dynamic during neurodevelopment and aging. Differentially methylated transcripts in the aged (64-week-old) hippocampus were enriched in microglia. The PD-1/PD-L1 pathways was identified that may participate in the cognitive dysfunction associated with an aged hippocampus. Furthermore, Mettl3 was spatiotemporally expressed in the postnatal hippocampus, which was highly expressed at the age of 11 weeks compared with the other two timepoints. Ectopic expression of METTL3 in mice hippocampus mediated by lentiviral infection resulted in high expression of genes related to PD-1/PD-L1 pathway and significant spatial cognitive deficit. Together, our data show that m6A dysregulation, which is mediated by METTL3, most likely contributes to cognitive deficits linked to the hippocampus via the PD-1/PD-L1 pathway.
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Affiliation(s)
- Wen Hu
- Department of Otolaryngology-Head and Neck Surgery, Xuanwu Hospital, Capital Medical University, Beijing, China
| | - Hongbo Xie
- Department of Otorhinolaryngology, Huadong Hospital Affiliated to Fudan University, Shanghai, China
| | - Yubing Zeng
- Beijing Municipal Key Laboratory of Child Development and Nutriomics, Capital Institute of Pediatrics, Beijing, China
| | - Pei Pei
- Beijing Municipal Key Laboratory of Child Development and Nutriomics, Capital Institute of Pediatrics, Beijing, China
| | - Xiaojun Zhan
- Department of Otorhinolaryngology Head and Neck Surgery, Children’s Hospital, Capital Institute of Pediatrics, Beijing, China
| | - Shan Wang
- Beijing Municipal Key Laboratory of Child Development and Nutriomics, Capital Institute of Pediatrics, Beijing, China
| | - Zhenlin Wang
- Department of Otolaryngology-Head and Neck Surgery, Xuanwu Hospital, Capital Medical University, Beijing, China
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11
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Anreiter I, Tian YW, Soller M. The cap epitranscriptome: Early directions to a complex life as mRNA. Bioessays 2023; 45:e2200198. [PMID: 36529693 DOI: 10.1002/bies.202200198] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2022] [Revised: 12/07/2022] [Accepted: 12/08/2022] [Indexed: 12/23/2022]
Abstract
Animal, protist and viral messenger RNAs (mRNAs) are most prominently modified at the beginning by methylation of cap-adjacent nucleotides at the 2'-O-position of the ribose (cOMe) by dedicated cap methyltransferases (CMTrs). If the first nucleotide of an mRNA is an adenosine, PCIF1 can methylate at the N6 -position (m6 A), while internally the Mettl3/14 writer complex can methylate. These modifications are introduced co-transcriptionally to affect many aspects of gene expression including localisation to synapses and local translation. Of particular interest, transcription start sites of many genes are heterogeneous leading to sequence diversity at the beginning of mRNAs, which together with cOMe and m6 Am could constitute an extensive novel layer of gene expression control. Given the role of cOMe and m6 A in local gene expression at synapses and higher brain functions including learning and memory, such code could be implemented at the transcriptional level for lasting memories through local gene expression at synapses.
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Affiliation(s)
- Ina Anreiter
- Department of Biological Sciences, University of Toronto Scarborough, Toronto, Canada
| | - Yuan W Tian
- Birmingham Centre for Genome Biology, University of Birmingham, Birmingham, UK.,School of Biosciences, College of Life and Environmental Sciences, University of Birmingham, Birmingham, UK
| | - Matthias Soller
- Birmingham Centre for Genome Biology, University of Birmingham, Birmingham, UK.,School of Biosciences, College of Life and Environmental Sciences, University of Birmingham, Birmingham, UK
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12
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Qiu Z, Bai X, Han X, Wang P, Wang X, Lv Y, An Y. Clinical and biological significance of RNA N6-methyladenosine regulators in Alzheimer disease. Medicine (Baltimore) 2023; 102:e32945. [PMID: 36800593 PMCID: PMC9936051 DOI: 10.1097/md.0000000000032945] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/19/2023] Open
Abstract
RNA N6-methyladenosine (m6A) regulators are essential for a variety of biological functions, such as early development, viral infections, and cancer. However, their roles in Alzheimer disease (AD) are still not very clear. Here, 16 significant m6A regulators were identified using difference analysis between AD patients and non-demented controls based on the GSE132903 dataset from the Gene Expression Omnibus database. Using these 16 m6A regulators, a nomogram model was established to predict the prevalence of AD. We found that patients could obtain a good clinical benefit based on this model. In addition, we revealed 2 distinct m6A patterns and 2 distinct m6A gene patterns in AD and demonstrated their prognostic and risk assessment significance. This present work comprehensively evaluated the functions of m6A regulators in the diagnosis and subtype classification of AD. These results suggested they have potential prognostic and risk assessment significance in AD.
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Affiliation(s)
- Zhiqiang Qiu
- Department of Neurosurgery, Sanbo Brain Hospital, Capital Medical University, Beijing, China
| | - Xuanyang Bai
- School of Public Health, China Medical University, Shenyang, Liaoning Province, China
| | - Xinye Han
- Department of Research and Development, Beijing Yihua Biotechnology Co., Ltd, Beijing, China
| | - Peishen Wang
- Department of Research and Development, Beijing Yihua Biotechnology Co., Ltd, Beijing, China
| | - Xiang Wang
- Department of Neurosurgery, Sanbo Brain Hospital, Capital Medical University, Beijing, China
| | - Yuxia Lv
- Medical Supply Center of Chinese PLA General Hospital, Beijing, China
- * Correspondence: Yuxia Lv, Medical Supply Center of Chinese PLA General Hospital, Beijing 100093, China (e-mail: )
| | - Yihua An
- Department of Neurosurgery, Sanbo Brain Hospital, Capital Medical University, Beijing, China
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13
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Charng YY, Mitra S, Yu SJ. Maintenance of abiotic stress memory in plants: Lessons learned from heat acclimation. THE PLANT CELL 2023; 35:187-200. [PMID: 36271858 PMCID: PMC9806581 DOI: 10.1093/plcell/koac313] [Citation(s) in RCA: 20] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2022] [Accepted: 10/17/2022] [Indexed: 05/23/2023]
Abstract
Plants acquire enhanced tolerance to intermittent abiotic stress by employing information obtained during prior exposure to an environmental disturbance, a process known as acclimation or defense priming. The capacity for stress memory is a critical feature in this process. The number of reports related to plant stress memory (PSM) has recently increased, but few studies have focused on the mechanisms that maintain PSM. Identifying the components involved in maintaining PSM is difficult due in part to the lack of clear criteria to recognize these components. In this review, based on what has been learned from genetic studies on heat acclimation memory, we propose criteria for identifying components of the regulatory networks that maintain PSM. We provide examples of the regulatory circuits formed by effectors and regulators of PSM. We also highlight strategies for assessing PSMs, update the progress in understanding the mechanisms of PSM maintenance, and provide perspectives for the further development of this exciting research field.
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Affiliation(s)
| | - Suma Mitra
- Agricultural Biotechnology Research Center, Academia Sinica, Taiwan, ROC
- Molecular and Biological Agricultural Sciences Program, TIGP, Academia Sinica, Taiwan, ROC
- Graduate Institute of Biotechnology, National Chung-Hsing University, Taichung, Taiwan, ROC
| | - Shih-Jiun Yu
- Agricultural Biotechnology Research Center, Academia Sinica, Taiwan, ROC
- Department of Biochemical Sciences and Technology, National Taiwan University, Taipei, Taiwan, ROC
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14
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Knockdown of METTL16 disrupts learning and memory by reducing the stability of MAT2A mRNA. Cell Death Dis 2022; 8:432. [PMID: 36307396 PMCID: PMC9616879 DOI: 10.1038/s41420-022-01220-0] [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: 06/18/2022] [Revised: 10/11/2022] [Accepted: 10/13/2022] [Indexed: 11/18/2022]
Abstract
N6-methyladenosine (m6A) is abundant in the mammalian brain and is considered to have a wide range of effects on learning and memory. Here, we found that the upregulated methyltransferase-like protein 16 (METTL16) in the hippocampal tissues of Morris water maze (MWM)-trained mice contributed to improved memory formation and hippocampal synaptic plasticity. Mechanismly, METTL16 promoted the expression of methionine adenosyltransferase 2A (MAT2A) by the m6A methylation of the MAT2A mRNA-3′UTR-end to increase its stability, and this involved in improving hippocampal global m6A levels, plasticity of dendritic spine, learning and memory. This study provides a new perspective to explore the regulatory mechanisms of m6A for learning and memory. ![]()
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15
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Roy B, Ochi S, Dwivedi Y. M6A RNA Methylation-Based Epitranscriptomic Modifications in Plasticity-Related Genes via miR-124-C/EBPα-FTO-Transcriptional Axis in the Hippocampus of Learned Helplessness Rats. Int J Neuropsychopharmacol 2022; 25:1037-1049. [PMID: 36161325 PMCID: PMC9743968 DOI: 10.1093/ijnp/pyac068] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/14/2022] [Revised: 09/20/2022] [Accepted: 09/23/2022] [Indexed: 01/07/2023] Open
Abstract
BACKGROUND Impaired synaptic plasticity has been linked to dynamic gene regulatory network changes. Recently, gene regulation has been introduced with the emerging concept of unique N6-methyladenosine (m6A)-based reversible transcript methylation. In this study, we tested whether m6A RNA methylation may potentially serve as a link between the stressful insults and altered expression of plasticity-related genes. METHODS Expression of plasticity genes Nr3c1, Creb1, Ntrk2; m6A-modifying enzymes Fto, methyltransferase like (Mettl)-3 and 14; DNA methylation enzymes Dnmt1, Dnmt3a; transcription factor C/ebp-α; and miRNA-124-3p were determined by quantitative polymerase chain reaction (qPCR) in the hippocampus of rats that showed susceptibility to develop stress-induced depression (learned helplessness). M6A methylation of plasticity-related genes was determined following m6A mRNA immunoprecipitation. Chromatin immunoprecipitation was used to examine the endogenous binding of C/EBP-α to the Fto promoter. MiR-124-mediated post-transcriptional inhibition of Fto via C/EBPα was determined using an in vitro model. RESULTS Hippocampus of learned helplessness rats showed downregulation of Nr3c1, Creb1, and Ntrk2 along with enrichment in their m6A methylation. A downregulation in demethylating enzyme Fto and upregulation in methylating enzyme Mettl3 were also noted. The Fto promoter was hypomethylated due to the lower expression of Dnmt1 and Dnmt3a. At the same time, there was a lower occupancy of transcription factor C/EBPα on the Fto promoter. Conversely, C/ebp-α transcript was downregulated via induced miR-124-3p expression. CONCLUSIONS Our study mechanistically linked defective C/EBP-α-FTO-axis, epigenetically influenced by induced expression of miR-124-3p, in modifying m6A enrichment in plasticity-related genes. This could potentially be linked with abnormal neuronal plasticity in depression.
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Affiliation(s)
- Bhaskar Roy
- Department of Psychiatry and Behavioral Neurobiology, University of Alabama atBirmingham, Birmingham, Alabama, USA
| | - Shinichiro Ochi
- Department of Psychiatry and Behavioral Neurobiology, University of Alabama atBirmingham, Birmingham, Alabama, USA,Department of Neuropsychiatry, Molecules and Function, Ehime University Graduate School of Medicine, Shitsukawa, Toon, Ehime, Japan
| | - Yogesh Dwivedi
- Correspondence: Yogesh Dwivedi, PhD, Elesabeth Ridgely Shook Professor, Director of Translational Research, UAB Mood Disorder Program, Codirector, Depression and Suicide Center, Department of Psychiatry and Behavioral Neurobiology, University of Alabama at Birmingham, SC711 Sparks Center, 1720 2nd Avenue South, Birmingham, AL, USA ()
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16
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Ma LH, Yan J, Jiao XH, Zhou CH, Wu YQ. The Role of Epigenetic Modifications in Neurotoxicity Induced by Neonatal General Anesthesia. Front Mol Neurosci 2022; 15:877263. [PMID: 35571375 PMCID: PMC9097083 DOI: 10.3389/fnmol.2022.877263] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2022] [Accepted: 03/28/2022] [Indexed: 01/01/2023] Open
Abstract
It has been widely demonstrated by numerous preclinical studies and clinical trials that the neonates receiving repeated or long-time general anesthesia (GA) could develop prolonged cognitive dysfunction. However, the definite mechanism remains largely unknown. Epigenetics, which is defined as heritable alterations in gene expression that are not a result of alteration of DNA sequence, includes DNA methylation, histone post-translational modifications, non-coding RNAs (ncRNAs), and RNA methylation. In recent years, the role of epigenetic modifications in neonatal GA-induced neurotoxicity has been widely explored and reported. In this review, we discuss and conclude the epigenetic mechanisms involving in the process of neonatal anesthesia-induced cognitive dysfunction. Also, we analyze the wide prospects of epigenetics in this field and its possibility to work as treatment target.
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Affiliation(s)
- Lin-Hui Ma
- Jiangsu Province Key Laboratory of Anesthesiology, Xuzhou Medical University, Xuzhou, China
- NMPA Key Laboratory for Research and Evaluation of Narcotic and Psychotropic Drugs, Xuzhou Medical University, Xuzhou, China
| | - Jing Yan
- Jiangsu Province Key Laboratory of Anesthesiology, Xuzhou Medical University, Xuzhou, China
- NMPA Key Laboratory for Research and Evaluation of Narcotic and Psychotropic Drugs, Xuzhou Medical University, Xuzhou, China
| | - Xin-Hao Jiao
- Jiangsu Province Key Laboratory of Anesthesiology, Xuzhou Medical University, Xuzhou, China
- NMPA Key Laboratory for Research and Evaluation of Narcotic and Psychotropic Drugs, Xuzhou Medical University, Xuzhou, China
| | - Cheng-Hua Zhou
- Jiangsu Key Laboratory of New Drug Research and Clinical Pharmacy, Xuzhou Medical University, Xuzhou, China
- *Correspondence: Cheng-Hua Zhou,
| | - Yu-Qing Wu
- Jiangsu Province Key Laboratory of Anesthesiology, Xuzhou Medical University, Xuzhou, China
- NMPA Key Laboratory for Research and Evaluation of Narcotic and Psychotropic Drugs, Xuzhou Medical University, Xuzhou, China
- *Correspondence: Cheng-Hua Zhou,
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17
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Emerging Roles of FTO in Neuropsychiatric Disorders. BIOMED RESEARCH INTERNATIONAL 2022; 2022:2677312. [PMID: 35528183 PMCID: PMC9071897 DOI: 10.1155/2022/2677312] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 02/07/2022] [Accepted: 04/11/2022] [Indexed: 12/11/2022]
Abstract
FTO (fat mass and obesity associated) is a recently discovered gene related to obesity and expressed in various tissues of the human body, especially with high expression in the brain. Earlier studies have found that FTO is involved in several biological processes, including brain development and function. In particular, recent studies have found that FTO is a demethylase of N6-methyladenosine (m6A) and it can affect neurological function through the m6A modification of mRNA. At present, a number of studies have shown that FTO is associated with many neuropsychiatric disorders. This paper reviews the discovery, structure, function, and tissue expression of FTO followed by discussing the relationship between FTO and neuropsychiatric diseases. In addition, the potential roles of FTO gene in drug addiction, major depression (MDD), and schizophrenia (SCZ) through regulating m6A modification of dopamine related genes were also highlighted.
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18
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Zhang N, Ding C, Zuo Y, Peng Y, Zuo L. N6-methyladenosine and Neurological Diseases. Mol Neurobiol 2022; 59:1925-1937. [PMID: 35032318 DOI: 10.1007/s12035-022-02739-0] [Citation(s) in RCA: 49] [Impact Index Per Article: 24.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2021] [Accepted: 01/08/2022] [Indexed: 12/14/2022]
Abstract
N6-methyladenosine (m6A) is a dynamic reversible methylation modification of the adenosine N6 position and is the most common chemical epigenetic modification among mRNA post-transcriptional modifications, including methylation, demethylation, and recognition. Post-transcriptional modification involves multiple protein molecules, including METTL3, METTL14, WTAP, KIAA1429, ALKBH5, YTHDF1/2/3, and YTHDC1/2. m6A-related proteins are expressed in almost all cells. However, the abnormal expression of m6A-related proteins may occur in the nervous system, thereby affecting neuritogenesis, brain volume, learning and memory, memory formation and consolidation, etc., and is implicated in the development of diseases, such as Parkinson's disease, Alzheimer's disease, multiple sclerosis, depression, epilepsy, and brain tumors. This review focuses on the functions of m6A in the development of central nervous system diseases, thus contributing to a deeper understanding of disease pathogenesis and providing potential clinical therapeutic targets for neurological diseases.
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Affiliation(s)
- Nan Zhang
- Department of Physiology, Institute of Neuroscience Research, Hengyang Key Laboratory of Neurodegeneration and Cognitive Impairment, Hengyang Medical College, University of South China, 28 West Changsheng Road, Hengyang, 421001, Hunan, China
| | - Chunhong Ding
- Department of Physiology, Institute of Neuroscience Research, Hengyang Key Laboratory of Neurodegeneration and Cognitive Impairment, Hengyang Medical College, University of South China, 28 West Changsheng Road, Hengyang, 421001, Hunan, China
| | - Yuxin Zuo
- Department of Physiology, Institute of Neuroscience Research, Hengyang Key Laboratory of Neurodegeneration and Cognitive Impairment, Hengyang Medical College, University of South China, 28 West Changsheng Road, Hengyang, 421001, Hunan, China
| | - Yu Peng
- Department of Physiology, Institute of Neuroscience Research, Hengyang Key Laboratory of Neurodegeneration and Cognitive Impairment, Hengyang Medical College, University of South China, 28 West Changsheng Road, Hengyang, 421001, Hunan, China
| | - Lielian Zuo
- Department of Physiology, Institute of Neuroscience Research, Hengyang Key Laboratory of Neurodegeneration and Cognitive Impairment, Hengyang Medical College, University of South China, 28 West Changsheng Road, Hengyang, 421001, Hunan, China.
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19
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Liu C, Yang S, Zhang Y, Wang C, Du D, Wang X, Liu T, Liang G. Emerging Roles of N6-Methyladenosine Demethylases and Its Interaction with Environmental Toxicants in Digestive System Cancers. Cancer Manag Res 2021; 13:7101-7114. [PMID: 34526822 PMCID: PMC8437382 DOI: 10.2147/cmar.s328188] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2021] [Accepted: 08/19/2021] [Indexed: 01/02/2023] Open
Abstract
Digestive system cancers are common cancers with high cancer deaths worldwide. They have become a major threat to public health and economic burden. As one of the most universal RNA modifications in eukaryotes, the N6-methyladenosine (m6A) modification is involved in the occurrence, development, prognosis, and treatment response of various cancers, including digestive system cancers. M6A demethylases shape the m6A landscape dynamically, playing important roles in cancers. In addition, accumulating evidence reveal that many environmental toxicants are the established risk factors for digestive system cancers and associated with m6A modification. In this review, we summarize the multiple functions of M6A demethylases (fat mass and obesity-associated protein (FTO), AlkB homolog 5 (ALKBH5) and AlkB homolog 3 (ALKBH3)) in digestive system cancers, which are aberrantly expressed and affect cancer progression. We also discuss the potential roles of m6A demethylases in the assessment of environmental exposure, the signature for prevention and diagnosis of digestive system cancers.
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Affiliation(s)
- Caiping Liu
- School of Public Health, Key Laboratory of Environmental Medicine Engineering, Ministry of Education, Southeast University, Nanjing, 210009, Jiangsu, People's Republic of China
| | - Sheng Yang
- School of Public Health, Key Laboratory of Environmental Medicine Engineering, Ministry of Education, Southeast University, Nanjing, 210009, Jiangsu, People's Republic of China
| | - Yanqiu Zhang
- Department of Environmental Occupational Health, Taizhou Center for Disease Control and Prevention, Taizhou, 225300, Jiangsu, People's Republic of China
| | - Chuntao Wang
- Jiangsu Vocational College of Medicine, Yancheng, 224000, Jiangsu, People's Republic of China
| | - Dandan Du
- School of Public Health, Key Laboratory of Environmental Medicine Engineering, Ministry of Education, Southeast University, Nanjing, 210009, Jiangsu, People's Republic of China
| | - Xian Wang
- School of Public Health, Key Laboratory of Environmental Medicine Engineering, Ministry of Education, Southeast University, Nanjing, 210009, Jiangsu, People's Republic of China
| | - Tong Liu
- School of Public Health, Key Laboratory of Environmental Medicine Engineering, Ministry of Education, Southeast University, Nanjing, 210009, Jiangsu, People's Republic of China
| | - Geyu Liang
- School of Public Health, Key Laboratory of Environmental Medicine Engineering, Ministry of Education, Southeast University, Nanjing, 210009, Jiangsu, People's Republic of China
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20
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Sun J, Ping Y, Huang J, Zeng B, Ji P, Li D. N6-Methyladenosine-Regulated mRNAs: Potential Prognostic Biomarkers for Patients With Lung Adenocarcinoma. Front Cell Dev Biol 2021; 9:705962. [PMID: 34422827 PMCID: PMC8377381 DOI: 10.3389/fcell.2021.705962] [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: 05/06/2021] [Accepted: 07/13/2021] [Indexed: 12/13/2022] Open
Abstract
Aberrant regulation of m6A mRNA modification can lead to changes in gene expression, thus contributing to tumorigenesis in several types of solid tumors. In this study, by integrating analyses of m6A methylation and mRNA expression, we identified 84 m6A-regulated mRNAs in lung adenocarcinoma (LUAD). Although the m6A methylation levels of total RNA in LUAD patient tumor tissue were reduced, the majority (75.2%) of m6A-regulated mRNAs were hypermethylated. The m6A-hypermethylated mRNAs were mainly enriched in terms related to transcription factor activity. We established a 10-m6A-regulated-mRNA signature score system through least absolute shrinkage and selection operator Cox regression analysis, with its predictive value validated by Kaplan–Meier curve and time-dependent receiver operating characteristic curves. RFXAP and KHDRBS2 from the signature also exhibited an independent prognostic value. The co-expression and interaction network analyses demonstrated the strong correlation between m6A regulators and the genes in the signature, further supporting the results of the m6A methylation modification patterns. These findings highlight the potential utility of integrating multi-omics data (m6A methylation level and mRNA expression) to accurately obtain potential prognostic biomarkers, which may provide important insights into developing novel and effective therapies for LUAD.
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Affiliation(s)
- Junjun Sun
- Department of Laboratory Medicine, Shanghai Tongji Hospital, School of Medicine, Tongji University, Shanghai, China
| | - Yili Ping
- Department of Laboratory Medicine, Shanghai Tongji Hospital, School of Medicine, Tongji University, Shanghai, China
| | - Jingjuan Huang
- Department of Laboratory Medicine, Shanghai Tongji Hospital, School of Medicine, Tongji University, Shanghai, China
| | - Bingjie Zeng
- Department of Laboratory Medicine, Shanghai Tongji Hospital, School of Medicine, Tongji University, Shanghai, China
| | - Ping Ji
- Department of Laboratory Medicine, Shanghai Tongji Hospital, School of Medicine, Tongji University, Shanghai, China
| | - Dong Li
- Department of Laboratory Medicine, Shanghai Tongji Hospital, School of Medicine, Tongji University, Shanghai, China
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21
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The m 6A-epitranscriptome in brain plasticity, learning and memory. Semin Cell Dev Biol 2021; 125:110-121. [PMID: 34053866 DOI: 10.1016/j.semcdb.2021.05.023] [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: 03/06/2021] [Revised: 05/17/2021] [Accepted: 05/18/2021] [Indexed: 12/15/2022]
Abstract
Activity-dependent gene expression and protein translation underlie the ability of neurons to dynamically adjust their synaptic strength in response to sensory experience and during learning. The emerging field of epitranscriptomics (RNA modifications) has rapidly shifted our views on the mechanisms that regulate gene expression. Among hundreds of biochemical modifications on RNA, N6-methyladenosine (m6A) is the most abundant reversible mRNA modification in the brain. Its dynamic nature and ability to regulate all aspects of mRNA processing have positioned m6A as an important and versatile regulator of nervous system functions, including neuronal plasticity, learning and memory. In this review, we summarise recent experimental evidence that supports the role of m6A signalling in learning and memory, as well as providing an overview of the underlying molecular mechanisms in neurons. We also discuss the consequences of perturbed m6A signalling and/or its regulatory networks which are increasingly being linked to various cognitive disorders in humans.
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22
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Tang J, Han T, Tong W, Zhao J, Wang W. N 6-methyladenosine (m 6A) methyltransferase KIAA1429 accelerates the gefitinib resistance of non-small-cell lung cancer. Cell Death Discov 2021; 7:108. [PMID: 34001850 PMCID: PMC8128911 DOI: 10.1038/s41420-021-00488-y] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2021] [Revised: 03/19/2021] [Accepted: 04/07/2021] [Indexed: 12/12/2022] Open
Abstract
N6-methyladenosine (m6A) modification has been convincingly identified to be a critical regulator in human cancer. However, the contribution of m6A to NSCLC gefitinib resistance is still largely unknown. Here, we screened and identified that m6A methyltransferase KIAA1429 was highly expressed in gefitinib-resistant NSCLC cells (PC9-GR), tissues, and closely related to unfavorable survival. Functionally, KIAA1429 accelerated the gefitinib resistance of NSCLC in vitro. Depletion of KIAA1429 repressed the tumor growth of PC9-GR cells in vivo. Mechanistically, KIAA1429 enhanced the mRNA stability of HOXA1 through targeting its 3'-untranslated regions (3'-UTR). Overall, our findings indicate that KIAA1429 plays essential oncogenic roles in NSCLC gefitinib resistance, which may provide a feasible therapeutic target for NSCLC.
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Affiliation(s)
- Jun Tang
- No. 1 Department of Tuberculosis, Chest Hospital, Shenyang, Liaoning Province, 110044, China
| | - Tianci Han
- Department of Thoracic Surgery, Cancer Hospital of China Medical University, Shenyang, Liaoning Province, 110042, China
- Department of Thoracic Surgery, Liaoning Cancer Hospital, Shenyang, Liaoning Province, 110042, China
| | - Wei Tong
- Department of Thoracic Surgery, Cancer Hospital of China Medical University, Shenyang, Liaoning Province, 110042, China
- Department of Thoracic Surgery, Liaoning Cancer Hospital, Shenyang, Liaoning Province, 110042, China
| | - Jian Zhao
- Department of Thoracic Surgery, Cancer Hospital of China Medical University, Shenyang, Liaoning Province, 110042, China
- Department of Thoracic Surgery, Liaoning Cancer Hospital, Shenyang, Liaoning Province, 110042, China
| | - Wei Wang
- Department of Thoracic Surgery, Cancer Hospital of China Medical University, Shenyang, Liaoning Province, 110042, China.
- Department of Thoracic Surgery, Liaoning Cancer Hospital, Shenyang, Liaoning Province, 110042, China.
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23
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Ma L, Huang Y, Zhang F, Gao DS, Sun N, Ren J, Xia S, Li J, Peng X, Yu L, Jiang BC, Yan M. MMP24 Contributes to Neuropathic Pain in an FTO-Dependent Manner in the Spinal Cord Neurons. Front Pharmacol 2021; 12:673831. [PMID: 33995105 PMCID: PMC8118694 DOI: 10.3389/fphar.2021.673831] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2021] [Accepted: 04/06/2021] [Indexed: 12/04/2022] Open
Abstract
Nerve injury-induced gene expression change in the spinal cord is critical for neuropathic pain genesis. RNA N6-methyladenosine (m6A) modification represents an additional layer of gene regulation. We showed that spinal nerve ligation (SNL) upregulated the expression of matrix metallopeptidase 24 (MMP24) protein, but not Mmp24 mRNA, in the spinal cord neurons. Blocking the SNL-induced upregulation of spinal MMP24 attenuated local neuron sensitization, neuropathic pain development and maintenance. Conversely, mimicking MMP24 increase promoted the spinal ERK activation and produced evoked nociceptive hypersensitivity. Methylated RNA Immunoprecipitation Sequencing (MeRIP-seq) and RNA Immunoprecipitation (RIP) assay indicated the decreased m6A enrichment in the Mmp24 mRNA under neuropathic pain condition. Moreover, fat-mass and obesity-associated protein (FTO) was colocalized with MMP24 in spinal neurons and shown increased binding to the Mmp24 mRNA in the spinal cord after SNL. Overexpression or suppression of FTO correlates with promotion or inhibition of MMP24 expression in cultured spinal cord neurons. In conclusion, SNL promoted the m6A eraser FTO binding to the Mmp24 mRNA, which subsequently facilitated the translation of MMP24 in the spinal cord, and ultimately contributed to neuropathic pain genesis.
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Affiliation(s)
- Longfei Ma
- Department of Anesthesiology, Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, China
| | - Yangyuxin Huang
- Department of Anesthesiology, Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, China
| | - Fengjiang Zhang
- Department of Anesthesiology, Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, China
| | - Dave Schwinn Gao
- Department of Anesthesiology, Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, China
| | - Na Sun
- Department of Anesthesiology, Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, China
| | - Jinxuan Ren
- Department of Anesthesiology, Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, China
| | - Suyun Xia
- Department of Anesthesiology, Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, China
| | - Jia Li
- Department of Anesthesiology, Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, China
| | - Xinyi Peng
- Department of Anesthesiology, Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, China
| | - Lina Yu
- Department of Anesthesiology, Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, China
| | - Bao-Chun Jiang
- Institute of Pain Medicine and Special Environmental Medicine, Nantong University, Nantong, China
| | - Min Yan
- Department of Anesthesiology, Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, China
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Jarome TJ, Kwapis JL. Special Issue "Molecular Mechanisms of Memory Formation and Modification". Int J Mol Sci 2021; 22:ijms22084113. [PMID: 33923416 PMCID: PMC8072671 DOI: 10.3390/ijms22084113] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2021] [Accepted: 04/13/2021] [Indexed: 11/16/2022] Open
Abstract
Memory is vital to human functioning and controls future behavioral responses [...].
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Affiliation(s)
- Timothy J. Jarome
- Department of Animal and Poultry Sciences, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, USA
- School of Neuroscience, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, USA
- Correspondence: (T.J.J.); (J.L.K.); Tel.: +1-540-231-3520 (T.J.J.); +1-814-863-0859 (J.L.K.)
| | - Janine L. Kwapis
- Department of Biology, Pennsylvania State University, University Park, PA 16802, USA
- Center for the Molecular Investigation of Neurological Disorders (CMIND), Pennsylvania State University, University Park, PA 16802, USA
- Correspondence: (T.J.J.); (J.L.K.); Tel.: +1-540-231-3520 (T.J.J.); +1-814-863-0859 (J.L.K.)
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