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McMahon A, Zhao J, Yan S. Ubiquitin-mediated regulation of APE2 protein abundance. J Biol Chem 2024:107337. [PMID: 38705397 DOI: 10.1016/j.jbc.2024.107337] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2023] [Revised: 04/12/2024] [Accepted: 04/24/2024] [Indexed: 05/07/2024] Open
Abstract
APE2 plays important roles in the maintenance of genomic and epigenomic stability including DNA repair and DNA damage response. Accumulating evidence has suggested that APE2 is upregulated in multiple cancers at the protein and mRNA levels, and that APE2 upregulation is correlative with higher and lower overall survival of cancer patients depending on tumor type. However, it remains unknown how APE2 protein abundance is maintained and regulated in cells. Here, we provide the first evidence of APE2 regulation via the post-translational modification (PTM) Ubiquitin. APE2 is poly-ubiquitinated via K48-linked chains and degraded via the Ubiquitin-Proteasome system where K371 is the key residue within APE2 responsible for its ubiquitination and degradation. We further characterize MKRN3 as the E3 ubiquitin ligase for APE2 ubiquitination in cells and in vitro. In summary, this study offers the first definition of the APE2 proteostasis network and lays the foundation for future studies pertaining to the PTM regulation and functions of APE2 in genome integrity and cancer etiology/treatment.
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Affiliation(s)
- Anne McMahon
- Department of Biological Sciences, University of North Carolina at Charlotte, Charlotte, NC 28223, USA
| | - Jianjun Zhao
- Department of Cancer Biology, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195, USA
| | - Shan Yan
- Department of Biological Sciences, University of North Carolina at Charlotte, Charlotte, NC 28223, USA; School of Data Science, University of North Carolina at Charlotte, Charlotte, NC 28223, USA; Center for Biomedical Engineering and Science, University of North Carolina at Charlotte, Charlotte, NC 28223, USA.
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2
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Feng X, Song D, Liu X, Liang Y, Jiang P, Wu S, Liu F. RNF125‑mediated ubiquitination of MCM6 regulates the proliferation of human liver hepatocellular carcinoma cells. Oncol Lett 2024; 27:105. [PMID: 38298426 PMCID: PMC10829068 DOI: 10.3892/ol.2024.14238] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2023] [Accepted: 12/20/2023] [Indexed: 02/02/2024] Open
Abstract
Hepatocellular carcinoma (HCC) is the third leading cause of cancer-associated mortality worldwide. Minichromosome maintenance proteins (MCMs), particularly MCM2-7, are upregulated in various cancers, including HCC. The aim of the present study was to investigate the role of MCM2-7 in human liver HCC (LIHC) and the regulation of the protein homeostasis of MCM6 by a specific E3 ligase. Bioinformatics analyses demonstrated that MCM2-7 were highly expressed in LIHC compared with corresponding normal tissues at the mRNA and protein levels, and patients with LIHC and high mRNA expression levels of MCM2, MCM3, MCM6 and MCM7 had poor overall survival rates. Cell Counting Kit-8 and colony formation assays revealed that the knockdown of MCM2, MCM3, MCM6 or MCM7 in Huh7 and Hep3B HCC cells inhibited cell proliferation and colony formation. In addition, pull-down, co-immunoprecipitation and ubiquitination assays demonstrated that RNF125 interacts with MCM6 and mediates its ubiquitination. Furthermore, co-transfection experiments indicated that RNF125 promoted the proliferation of HCC cells mainly through MCM6. In summary, the present study suggests that the RNF125-MCM6 axis plays an important role in the regulation of HCC cell proliferation and is a promising therapeutic target for the treatment of LIHC.
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Affiliation(s)
- Xueyi Feng
- Department of General Surgery, The First Affiliated Hospital of Anhui Medical University, Hefei, Anhui 230022, P.R. China
- Department of General Surgery, Lu'an Affiliated Hospital of Anhui Medical University, Lu'an, Anhui 237005, P.R. China
| | - Dongqiang Song
- Liver Cancer Institute, Zhongshan Hospital of Fudan University, Shanghai 200032, P.R. China
| | - Xiaolan Liu
- Department of Gastroenterology, The Affiliated Hospital of Qingdao University, Qingdao, Shandong 266003, P.R. China
| | - Yongkang Liang
- Department of General Surgery, The First Affiliated Hospital of Anhui Medical University, Hefei, Anhui 230022, P.R. China
- Department of General Surgery, Lu'an Affiliated Hospital of Anhui Medical University, Lu'an, Anhui 237005, P.R. China
| | - Pin Jiang
- Department of General Surgery, Lu'an Affiliated Hospital of Anhui Medical University, Lu'an, Anhui 237005, P.R. China
| | - Shenwei Wu
- Department of General Surgery, Lu'an Affiliated Hospital of Anhui Medical University, Lu'an, Anhui 237005, P.R. China
| | - Fubao Liu
- Department of General Surgery, The First Affiliated Hospital of Anhui Medical University, Hefei, Anhui 230022, P.R. China
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Sheng X, Xia Z, Yang H, Hu R. The ubiquitin codes in cellular stress responses. Protein Cell 2024; 15:157-190. [PMID: 37470788 PMCID: PMC10903993 DOI: 10.1093/procel/pwad045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2023] [Accepted: 07/04/2023] [Indexed: 07/21/2023] Open
Abstract
Ubiquitination/ubiquitylation, one of the most fundamental post-translational modifications, regulates almost every critical cellular process in eukaryotes. Emerging evidence has shown that essential components of numerous biological processes undergo ubiquitination in mammalian cells upon exposure to diverse stresses, from exogenous factors to cellular reactions, causing a dazzling variety of functional consequences. Various forms of ubiquitin signals generated by ubiquitylation events in specific milieus, known as ubiquitin codes, constitute an intrinsic part of myriad cellular stress responses. These ubiquitination events, leading to proteolytic turnover of the substrates or just switch in functionality, initiate, regulate, or supervise multiple cellular stress-associated responses, supporting adaptation, homeostasis recovery, and survival of the stressed cells. In this review, we attempted to summarize the crucial roles of ubiquitination in response to different environmental and intracellular stresses, while discussing how stresses modulate the ubiquitin system. This review also updates the most recent advances in understanding ubiquitination machinery as well as different stress responses and discusses some important questions that may warrant future investigation.
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Affiliation(s)
- Xiangpeng Sheng
- Key Laboratory of Systems Health Science of Zhejiang Province, School of Life Science, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou 310024, China
- State Key Laboratory of Molecular Biology, Shanghai Institute of Biochemistry and Cell Biology, Center for Excellence in Molecular Cell Science, Chinese Academy of Sciences, Shanghai 200031, China
- State Key Laboratory of Animal Disease Control, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin 150069, China
| | - Zhixiong Xia
- Key Laboratory of Systems Health Science of Zhejiang Province, School of Life Science, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou 310024, China
- State Key Laboratory of Molecular Biology, Shanghai Institute of Biochemistry and Cell Biology, Center for Excellence in Molecular Cell Science, Chinese Academy of Sciences, Shanghai 200031, China
| | - Hanting Yang
- Department of Neurology, State Key Laboratory of Medical Neurobiology, Institute for Translational Brain Research, MOE Frontiers Center for Brain Science, Zhongshan Hospital, Fudan University, Shanghai 200032, China
| | - Ronggui Hu
- Key Laboratory of Systems Health Science of Zhejiang Province, School of Life Science, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou 310024, China
- State Key Laboratory of Molecular Biology, Shanghai Institute of Biochemistry and Cell Biology, Center for Excellence in Molecular Cell Science, Chinese Academy of Sciences, Shanghai 200031, China
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Wang H, Min J, Ding Y, Yu Z, Zhou Y, Wang S, Gong A, Xu M. MBD3 promotes epithelial-mesenchymal transition in gastric cancer cells by upregulating ACTG1 via the PI3K/AKT pathway. Biol Proced Online 2024; 26:1. [PMID: 38178023 PMCID: PMC10768447 DOI: 10.1186/s12575-023-00228-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2023] [Accepted: 12/20/2023] [Indexed: 01/06/2024] Open
Abstract
BACKGROUND Gastric cancer (GC) is a common malignancy and a leading cause of cancer-related death with high morbidity and mortality. Methyl-CpG binding domain protein 3 (MBD3), a key epigenetic regulator, is abnormally expressed in several cancers, participating in progression and metastasis. However, the role of MBD3 in GC remains unknown. METHODS MBD3 expression was assessed via public databases and validated by western blotting and quantitative real-time polymerase chain reaction (qRT-PCR). The prognosis of MBD3 was analysed via bioinformatics based on the TCGA dataset. The migration, invasion and proliferation of GC cells were examined by transwell, wound healing, cell counting kit (CCK)-8, colony-formation and xenograft mouse models. Epithelial-mesenchymal transition (EMT) and phosphatidylinositide 3-kinases/ protein Kinase B (PI3K/AKT) pathway markers were evaluated by Western blotting. RNA sequencing was used to identify the target of MBD3. RESULTS MBD3 expression was higher in GC tissues and cells than in normal tissues and cells. Additionally, high MBD3 levels were associated with poor prognosis in GC patients. Subsequently, we proved that MBD3 enhanced the migration, invasion and proliferation abilities of GC cells. Moreover, western blot results showed that MBD3 promoted EMT and activated the PI3K/AKT pathway. RNA sequencing analysis showed that MBD3 may increase actin γ1 (ACTG1) expression to promote migration and proliferation in GC cells. CONCLUSION MBD3 promoted migration, invasion, proliferation and EMT by upregulating ACTG1 via PI3K/AKT signaling activation in GC cells and may be a potential diagnostic and prognostic target.
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Affiliation(s)
- Huizhi Wang
- Department of Gastroenterology, Affiliated Hospital of Jiangsu University, Jiangsu University, 438 Jiefang Road, Zhenjiang, 212001, China
| | - Jingyu Min
- Department of Gastroenterology, Changshu No.2 People's Hospital, 68 Haiyu South Road, Changshu, 215500, China
| | - Yuntao Ding
- Department of Gastroenterology, Affiliated Hospital of Jiangsu University, Jiangsu University, 438 Jiefang Road, Zhenjiang, 212001, China
| | - Zhengyue Yu
- Department of Gastroenterology, Affiliated Hospital of Jiangsu University, Jiangsu University, 438 Jiefang Road, Zhenjiang, 212001, China
| | - Yujing Zhou
- Department of Gastroenterology, Affiliated Hospital of Jiangsu University, Jiangsu University, 438 Jiefang Road, Zhenjiang, 212001, China
| | - Shunyu Wang
- Department of Gastroenterology, Affiliated Hospital of Jiangsu University, Jiangsu University, 438 Jiefang Road, Zhenjiang, 212001, China
| | - Aihua Gong
- Department of Cell Biology, School of Medicine, Jiangsu University, 301 Xuefu Road, Zhenjiang, 212013, China
| | - Min Xu
- Department of Gastroenterology, Affiliated Hospital of Jiangsu University, Jiangsu University, 438 Jiefang Road, Zhenjiang, 212001, China.
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Zang S, Yin X, Li P. FTO-mediated m 6A demethylation regulates GnRH expression in the hypothalamus via the PLCβ3/Ca 2+/CAMK signalling pathway. Commun Biol 2023; 6:1297. [PMID: 38129517 PMCID: PMC10739951 DOI: 10.1038/s42003-023-05677-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2023] [Accepted: 12/05/2023] [Indexed: 12/23/2023] Open
Abstract
N6-methyladenosine (m6A) plays a crucial role in the development and functional homeostasis of the central nervous system. The fat mass and obesity-associated (FTO) gene, which is highly expressed in the hypothalamus, is closely related to female pubertal development. In this study, we found that m6A methylation decreased in the hypothalamus gradually with puberty and decreased in female rats with precocious puberty. FTO expression was increased at the same time. Methylated RNA immunoprecipitation sequencing (MeRIP-seq) showed that the m6A methylation of PLCβ3, a key enzyme of the Ca2+ signalling pathway, was decreased significantly in the hypothalamus in precocious rats. Upregulating FTO increased PLCβ3 expression and activated the Ca2+ signalling pathway, which promoted GnRH expression. Dual-luciferase reporter and MeRIP-qPCR assays confirmed that FTO regulated m6A demethylation of PLCβ3 and promoted PLCβ3 expression. Upon overexpressing FTO in the hypothalamic arcuate nucleus (ARC) in female rats, we observed advanced puberty onset. Meanwhile, PLCβ3 and GnRH expression in the hypothalamus increased significantly, and the Ca2+ signalling pathway was activated. Our study demonstrates that FTO enhances GnRH expression, which promotes puberty onset, by regulating m6A demethylation of PLCβ3 and activating the Ca2+ signalling pathway.
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Affiliation(s)
- Shaolian Zang
- Department of endocrinology, Shanghai Children's Hospital, School of medicine, Shanghai Jiao Tong University, 200062, Shanghai, China
| | - Xiaoqin Yin
- Department of endocrinology, Shanghai Children's Hospital, School of medicine, Shanghai Jiao Tong University, 200062, Shanghai, China.
| | - Pin Li
- Department of endocrinology, Shanghai Children's Hospital, School of medicine, Shanghai Jiao Tong University, 200062, Shanghai, China.
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Li TJ, Jin KZ, Zhou HY, Liao ZY, Zhang HR, Shi SM, Lin MX, Chai SJ, Fei QL, Ye LY, Yu XJ, Wu WD. Deubiquitinating PABPC1 by USP10 upregulates CLK2 translation to promote tumor progression in pancreatic ductal adenocarcinoma. Cancer Lett 2023; 576:216411. [PMID: 37757903 DOI: 10.1016/j.canlet.2023.216411] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2023] [Revised: 09/06/2023] [Accepted: 09/23/2023] [Indexed: 09/29/2023]
Abstract
Pancreatic ductal adenocarcinoma (PDAC) is extremely malignant with limited treatment options. Deubiquitinases (DUBs), which cleave ubiquitin on substrates, can regulate tumor progression and are appealing therapeutic targets, but there are few related studies in PDAC. In our study, we screened the expression levels and prognostic value of USP family members based on published databases and selected USP10 as the potential interventional target in PDAC. IHC staining of the PDAC microarray revealed that USP10 expression was an adverse clinical feature of PDAC. USP10 promoted tumor growth both in vivo and in vitro in PDAC. Co-IP experiments revealed that USP10 directly interacts with PABPC1. Deubiquitination assays revealed that USP10 decreased the K27/29-linked ubiquitination level of the RRM2 domain of PABPC1. Deubiquitinated PABPC1 was able to couple more CLK2 mRNA and eIF4G1, which increased the translation efficiency. Replacing PABPC1 with a mutant that could not be ubiquitinated impaired USP10 knock-down-mediated tumor suppression in PDAC. Targeting USP10 significantly delayed the growth of cell-derived xenograft and patient-derived xenograft tumors. Collectively, our study first identified USP10 as the DUB of PABPC1 and provided a rationale for potential therapeutic options for PDAC with high USP10 expression.
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Affiliation(s)
- Tian-Jiao Li
- Department of Pancreatic Surgery, Fudan University Shanghai Cancer Centre, Shanghai, 200032, China; Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, 200032, China; Shanghai Pancreatic Cancer Institute, Shanghai, 200032, China; Pancreatic Cancer Institute, Fudan University, Shanghai, 200032, China
| | - Kai-Zhou Jin
- Department of Pancreatic Surgery, Fudan University Shanghai Cancer Centre, Shanghai, 200032, China; Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, 200032, China; Shanghai Pancreatic Cancer Institute, Shanghai, 200032, China; Pancreatic Cancer Institute, Fudan University, Shanghai, 200032, China
| | - Hong-Yu Zhou
- Department of Clinical Oncology, LKS Faculty of Medicine, The University of Hong Kong,Hong Kong, China
| | - Zhen-Yu Liao
- Department of Pancreatic Surgery, Fudan University Shanghai Cancer Centre, Shanghai, 200032, China; Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, 200032, China; Shanghai Pancreatic Cancer Institute, Shanghai, 200032, China; Pancreatic Cancer Institute, Fudan University, Shanghai, 200032, China
| | - Hui-Ru Zhang
- Department of Pancreatic Surgery, Fudan University Shanghai Cancer Centre, Shanghai, 200032, China; Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, 200032, China; Shanghai Pancreatic Cancer Institute, Shanghai, 200032, China; Pancreatic Cancer Institute, Fudan University, Shanghai, 200032, China
| | - Sai-Meng Shi
- Department of Pancreatic Surgery, Fudan University Shanghai Cancer Centre, Shanghai, 200032, China; Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, 200032, China; Shanghai Pancreatic Cancer Institute, Shanghai, 200032, China; Pancreatic Cancer Institute, Fudan University, Shanghai, 200032, China
| | - Meng-Xiong Lin
- Department of Pancreatic Surgery, Fudan University Shanghai Cancer Centre, Shanghai, 200032, China; Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, 200032, China; Shanghai Pancreatic Cancer Institute, Shanghai, 200032, China; Pancreatic Cancer Institute, Fudan University, Shanghai, 200032, China
| | - Shou-Jie Chai
- Department of Oncology, Ningbo First Hospital, Ningbo, China
| | - Qing-Lin Fei
- Department of Pancreatic Surgery, Fudan University Shanghai Cancer Centre, Shanghai, 200032, China; Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, 200032, China; Shanghai Pancreatic Cancer Institute, Shanghai, 200032, China; Pancreatic Cancer Institute, Fudan University, Shanghai, 200032, China
| | - Long-Yun Ye
- Department of Pancreatic Surgery, Fudan University Shanghai Cancer Centre, Shanghai, 200032, China; Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, 200032, China; Shanghai Pancreatic Cancer Institute, Shanghai, 200032, China; Pancreatic Cancer Institute, Fudan University, Shanghai, 200032, China.
| | - Xian-Jun Yu
- Department of Pancreatic Surgery, Fudan University Shanghai Cancer Centre, Shanghai, 200032, China; Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, 200032, China; Shanghai Pancreatic Cancer Institute, Shanghai, 200032, China; Pancreatic Cancer Institute, Fudan University, Shanghai, 200032, China.
| | - Wei-Ding Wu
- Department of Pancreatic Surgery, Fudan University Shanghai Cancer Centre, Shanghai, 200032, China; Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, 200032, China; Shanghai Pancreatic Cancer Institute, Shanghai, 200032, China; Pancreatic Cancer Institute, Fudan University, Shanghai, 200032, China.
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Zhang Y, Sui Z, Zhang Z, Wang C, Li X, Xing F. Analysis of the Imprinting Status and Expression of the MAGEL2 Gene During Initiation at Puberty in the Dolang Sheep. DNA Cell Biol 2023; 42:689-696. [PMID: 37843913 DOI: 10.1089/dna.2023.0166] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2023] Open
Abstract
Genomic imprinting refers to the expression of parent-specific genes in diploid mammalian cells. MAGEL2 gene is a maternally imprinted gene that has been identified in mice and humans and is associated with the onset of puberty. The purpose of this study was to investigate its imprinting status and its relationship with the onset of puberty in Dolang sheep. The sequence of 3734 bp cDNA of MAGEL2 in Dolang sheep was obtained by cloning and sequencing, encoding 1173 amino acids. The results of the nucleotide and amino acid similarity analysis showed that it was highly conserved among different mammalian species. The MAGEL2 gene was expressed monoallelically in the tissues of adult and neonatal umbilical cords, and the expressed allele was paternally inherited. Real Time quantitative PCR (RT-qPCR) results showed that the MAGEL2 gene was highly expressed in the hypothalamus and pituitary gland, increased significantly from prepuberty to puberty, and decreased significantly after puberty. This study suggests that MAGEL2 is a paternally expressed and maternally imprinted gene in Dolang sheep, which may be involved in the initiation of puberty in Dolang sheep. This study provides a theoretical basis for further research on the mechanism of the imprinted gene MAGEL2 regulating the onset of puberty in sheep, and provides a new idea for the future research on the mechanism of onset of puberty in sheep.
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Affiliation(s)
- Yongjie Zhang
- College of Animal Science and Technology, Tarim University, Xinjiang Production and Construction Corps, Alar, China
- Key Laboratory of Tarim Animal Husbandry Science and Technology, Xinjiang Production and Construction Corps, Alar, China
| | - Zhiyuan Sui
- College of Animal Science and Technology, Tarim University, Xinjiang Production and Construction Corps, Alar, China
- Key Laboratory of Tarim Animal Husbandry Science and Technology, Xinjiang Production and Construction Corps, Alar, China
| | - Zhishuai Zhang
- College of Animal Science and Technology, Tarim University, Xinjiang Production and Construction Corps, Alar, China
- Key Laboratory of Tarim Animal Husbandry Science and Technology, Xinjiang Production and Construction Corps, Alar, China
| | - Chenguang Wang
- College of Animal Science and Technology, Tarim University, Xinjiang Production and Construction Corps, Alar, China
- Key Laboratory of Tarim Animal Husbandry Science and Technology, Xinjiang Production and Construction Corps, Alar, China
| | - Xiaojun Li
- College of Animal Science and Technology, Tarim University, Xinjiang Production and Construction Corps, Alar, China
- Key Laboratory of Tarim Animal Husbandry Science and Technology, Xinjiang Production and Construction Corps, Alar, China
| | - Feng Xing
- College of Animal Science and Technology, Tarim University, Xinjiang Production and Construction Corps, Alar, China
- Key Laboratory of Tarim Animal Husbandry Science and Technology, Xinjiang Production and Construction Corps, Alar, China
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Luo Y, Yang Y, Yang C, Li C, Hu R, Geng W, Kang X, Lin H. UBE3A and MCM6 synergistically regulate the proliferation and migration of lung adenocarcinoma cells. FEBS Open Bio 2023; 13:1756-1771. [PMID: 37454373 PMCID: PMC10476561 DOI: 10.1002/2211-5463.13675] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2023] [Revised: 05/16/2023] [Accepted: 07/13/2023] [Indexed: 07/18/2023] Open
Abstract
Lung cancer is a leading cause of mortality worldwide and shows substantial clinical and biomolecular heterogeneity. Currently, specific therapeutic strategies are lacking, so effective drug targets are urgently needed. E6AP/UBE3A is a multifaceted ubiquitin ligase that controls various signaling pathways implicated in neurological diseases and various cancers; however, its role in lung cancer is incompletely understood. Here, MCM6 was identified as an interacting partner of E6AP using the yeast two-hybrid assay. MCM2 and MCM4 were then shown to interact with E6AP. E6AP knockout enhanced the ubiquitination of MCM2/4/6, suggesting that E6AP was not the E3 ubiquitin ligase for these three MCM proteins. Ablation of E6AP inhibited proliferation and migration, but had no significant effect on apoptosis in A549 and H1975 cells, and proliferation and migration inhibition was also observed in MCM6 knockdown cells. Furthermore, ablation of MCM6 and E6AP synergistically suppressed the proliferation and migration of A549 and H1975 cells. To verify the above findings in vivo, we established tumor models in nude mice and identified that the tumorigenicity of human lung adenocarcinoma (LUAD) cells was synergistically regulated by MCM6 and E6AP. Moreover, the expression levels of MCM6 and E6AP were higher in LUAD tissues than in adjacent tissues. Furthermore, the expression levels of MCM6 and E6AP were positively correlated in human LUAD samples. Thus, our study suggests that the interaction of E6AP and MCM proteins plays an important role in the progression of LUAD, which might offer potential therapeutic targets for cancer treatment.
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Affiliation(s)
- Yanyan Luo
- Department of Pain, Wenzhou Key Laboratory of Perioperative MedicineThe First Affiliated Hospital of Wenzhou Medical UniversityChina
- State Key Laboratory of Molecular Biology, Shanghai Institute of Biochemistry and Cell BiologyCenter for Excellence in Molecular Cell Science, Chinese Academy of SciencesShanghaiChina
| | - Yun Yang
- State Key Laboratory of Molecular Biology, Shanghai Institute of Biochemistry and Cell BiologyCenter for Excellence in Molecular Cell Science, Chinese Academy of SciencesShanghaiChina
- School of MedicineGuizhou UniversityGuiyangChina
| | - Cong Yang
- Cancer Center, School of Medicine, Shanghai Tenth People's HospitalfTongji UniversityShanghaiChina
| | - Chuanyin Li
- Cancer Center, School of Medicine, Shanghai Tenth People's HospitalfTongji UniversityShanghaiChina
| | - Ronggui Hu
- Department of Pain, Wenzhou Key Laboratory of Perioperative MedicineThe First Affiliated Hospital of Wenzhou Medical UniversityChina
- State Key Laboratory of Molecular Biology, Shanghai Institute of Biochemistry and Cell BiologyCenter for Excellence in Molecular Cell Science, Chinese Academy of SciencesShanghaiChina
| | - Wujun Geng
- Department of Pain, Wenzhou Key Laboratory of Perioperative MedicineThe First Affiliated Hospital of Wenzhou Medical UniversityChina
| | - Xianhui Kang
- Department of Pain, Wenzhou Key Laboratory of Perioperative MedicineThe First Affiliated Hospital of Wenzhou Medical UniversityChina
- Department of Anesthesiology, The First Affiliated HospitalZhejiang University School of MedicineHangzhouChina
| | - Hai Lin
- Department of Pain, Wenzhou Key Laboratory of Perioperative MedicineThe First Affiliated Hospital of Wenzhou Medical UniversityChina
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Yang Y, Luo Y, Yang C, Hu R, Qin X, Li C. TRIM25-mediated ubiquitination of G3BP1 regulates the proliferation and migration of human neuroblastoma cells. Biochim Biophys Acta Gene Regul Mech 2023; 1866:194954. [PMID: 37302696 DOI: 10.1016/j.bbagrm.2023.194954] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/11/2023] [Revised: 05/24/2023] [Accepted: 06/07/2023] [Indexed: 06/13/2023]
Abstract
Neuroblastoma is one of the most severe malignant tumors and accounts for substantial cancer-related mortality in children. Ras-GTPase-activating protein SH3 domain-binding protein 1 (G3BP1) is highly expressed in various cancers and acts as an important biomarker of poor prognosis. The ablation of G3BP1 inhibited the proliferation and migration of human SHSY5Y cells. Because of its important role in neuroblastoma, the regulation of G3BP1 protein homeostasis was probed. TRIM25, which belongs to the tripartite motif (TRIM) family of proteins, was identified as an interacting partner for G3BP1 using the yeast two-hybrid (Y2H) method. TRIM25 mediates the ubiquitination of G3BP1 at multiple sites and stabilizes its protein level. Then, our study found that TRIM25 knockdown also inhibited the proliferation and migration of neuroblastoma cells. The TRIM25 and G3BP1 double knockdown SHSY5Y cell line was generated, and double knockdown cells exhibited lower proliferation and migration ability than cells with only TRIM25 or G3BP1 knockdown. Further study demonstrated that TRIM25 promotes the proliferation and migration of neuroblastoma cells in a G3BP1-dependent manner. Tumor xenograft assays indicated that the ablation of TRIM25 and G3BP1 synergistically suppressed the tumorigenicity of neuroblastoma cells in nude mice, and TRIM25 promoted the tumorigenicity of G3BP1 intact SHSY5Y cells but not G3BP1 knockout cells. Thus, TRIM25 and G3BP1, two oncogenic genes, are suggested as potential therapeutic targets for neuroblastoma.
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Affiliation(s)
- Yun Yang
- School of Medicine, Guizhou University, Guiyang 550025, China; State Key Laboratory of Molecular Biology, Shanghai Institute of Biochemistry and Cell Biology, Center for Excellence in Molecular Cell Science, Chinese Academy of Sciences, Shanghai 200031, China
| | - Yanyan Luo
- State Key Laboratory of Molecular Biology, Shanghai Institute of Biochemistry and Cell Biology, Center for Excellence in Molecular Cell Science, Chinese Academy of Sciences, Shanghai 200031, China; Department of Pain, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou 325000, China
| | - Cong Yang
- Cancer Center, Shanghai Tenth People's Hospital, School of Medicine, Tongji University, Shanghai 200040, China
| | - Ronggui Hu
- School of Medicine, Guizhou University, Guiyang 550025, China; State Key Laboratory of Molecular Biology, Shanghai Institute of Biochemistry and Cell Biology, Center for Excellence in Molecular Cell Science, Chinese Academy of Sciences, Shanghai 200031, China.
| | - Xiong Qin
- Department of Thoracic Surgery, Shanghai Pulmonary Hospital, School of Medicine, Tongji University, Shanghai 200433, China.
| | - Chuanyin Li
- Cancer Center, Shanghai Tenth People's Hospital, School of Medicine, Tongji University, Shanghai 200040, China.
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10
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Hoyos Sanchez MC, Bayat T, Gee RRF, Fon Tacer K. Hormonal Imbalances in Prader-Willi and Schaaf-Yang Syndromes Imply the Evolution of Specific Regulation of Hypothalamic Neuroendocrine Function in Mammals. Int J Mol Sci 2023; 24:13109. [PMID: 37685915 PMCID: PMC10487939 DOI: 10.3390/ijms241713109] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2023] [Revised: 08/16/2023] [Accepted: 08/17/2023] [Indexed: 09/10/2023] Open
Abstract
The hypothalamus regulates fundamental aspects of physiological homeostasis and behavior, including stress response, reproduction, growth, sleep, and feeding, several of which are affected in patients with Prader-Willi (PWS) and Schaaf-Yang syndrome (SYS). PWS is caused by paternal deletion, maternal uniparental disomy, or imprinting defects that lead to loss of expression of a maternally imprinted region of chromosome 15 encompassing non-coding RNAs and five protein-coding genes; SYS patients have a mutation in one of them, MAGEL2. Throughout life, PWS and SYS patients suffer from musculoskeletal deficiencies, intellectual disabilities, and hormonal abnormalities, which lead to compulsive behaviors like hyperphagia and temper outbursts. Management of PWS and SYS is mostly symptomatic and cures for these debilitating disorders do not exist, highlighting a clear, unmet medical need. Research over several decades into the molecular and cellular roles of PWS genes has uncovered that several impinge on the neuroendocrine system. In this review, we will discuss the expression and molecular functions of PWS genes, connecting them with hormonal imbalances in patients and animal models. Besides the observed hormonal imbalances, we will describe the recent findings about how the loss of individual genes, particularly MAGEL2, affects the molecular mechanisms of hormone secretion. These results suggest that MAGEL2 evolved as a mammalian-specific regulator of hypothalamic neuroendocrine function.
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Affiliation(s)
- Maria Camila Hoyos Sanchez
- School of Veterinary Medicine, Texas Tech University, 7671 Evans Dr., Amarillo, TX 79106, USA
- Texas Center for Comparative Cancer Research (TC3R), Amarillo, TX 79106, USA
| | - Tara Bayat
- School of Veterinary Medicine, Texas Tech University, 7671 Evans Dr., Amarillo, TX 79106, USA
- Texas Center for Comparative Cancer Research (TC3R), Amarillo, TX 79106, USA
| | - Rebecca R. Florke Gee
- School of Veterinary Medicine, Texas Tech University, 7671 Evans Dr., Amarillo, TX 79106, USA
- Texas Center for Comparative Cancer Research (TC3R), Amarillo, TX 79106, USA
| | - Klementina Fon Tacer
- School of Veterinary Medicine, Texas Tech University, 7671 Evans Dr., Amarillo, TX 79106, USA
- Texas Center for Comparative Cancer Research (TC3R), Amarillo, TX 79106, USA
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11
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Zhou L, Jia X, Yang X. Clinical significance of serum MBD3 detection in girls with central precocious puberty. Open Med (Wars) 2023; 18:20220614. [PMID: 37426049 PMCID: PMC10329158 DOI: 10.1515/med-2022-0614] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2022] [Revised: 11/02/2022] [Accepted: 11/04/2022] [Indexed: 07/11/2023] Open
Abstract
Diagnosis of central precocious puberty (CPP) in girls remains a huge challenge. The current study was to measure the serum expression of methyl-DNA bind protein 3 (MBD3) in CPP girls and assess its diagnostic efficacy. To begin with, we enrolled 109 CPP girls and 74 healthy pre-puberty girls. Then, MBD3 expression in their serum samples was measured via reverse transcription-quantitative polymerase chain reaction, and its diagnostic efficacy on CPP was assessed via the receiver operating characteristic (ROC) curve, followed by correlation analysis between serum MBD3 and patient age, gender, bone age, weight, height, body mass index, basal luteinizing hormone (LH), peak LH, basal follicle-stimulating hormone (FSH), peak FSH, and ovarian size using bivariate correlations method. Finally, independent predictors of MBD3 expression were confirmed using multivariate linear regression analysis. MBD3 was highly expressed in sera of CPP patients. The area under the ROC curve of MBD3 diagnosing CCP was 0.9309, with 1.475 cut-off value (92.66% sensitivity and 86.49% specificity). MBD3 expression positively correlated with basal LH, peak LH, basal FSH, and ovarian size, among which basal LH was considered the strongest independent predictor of MBD3, followed by basal FSH and peak LH. In summary, serum MBD3 could act as a biomarker in aiding CPP diagnosis.
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Affiliation(s)
- Lili Zhou
- Department of Pediatrics, Beijing University of Chinese Medicine Shenzhen Hospital (Longgang), No. 1 Dayun Road, Shenzhen, 518000, China
| | - Xiao Jia
- Department of Orthopaedics, Gansu Provincial Hospital of TCM, Lanzhou, 730050, China
| | - Xiangzheng Yang
- Department of Pediatrics, Beijing University of Chinese Medicine Shenzhen Hospital (Longgang), Shenzhen, 518000, China
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12
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Magnotto JC, Mancini A, Bird K, Montenegro L, Tütüncüler F, Pereira SA, Simas V, Garcia L, Roberts SA, Macedo D, Magnuson M, Gagliardi P, Mauras N, Witchel SF, Carroll RS, Latronico AC, Kaiser UB, Abreu AP. Novel MKRN3 Missense Mutations Associated With Central Precocious Puberty Reveal Distinct Effects on Ubiquitination. J Clin Endocrinol Metab 2023; 108:1646-1656. [PMID: 36916482 PMCID: PMC10653150 DOI: 10.1210/clinem/dgad151] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/08/2022] [Revised: 03/02/2023] [Accepted: 03/10/2023] [Indexed: 03/15/2023]
Abstract
CONTEXT Loss-of-function mutations in the maternally imprinted genes, MKRN3 and DLK1, are associated with central precocious puberty (CPP). Mutations in MKRN3 are the most common known genetic etiology of CPP. OBJECTIVE This work aimed to screen patients with CPP for MKRN3 and DLK1 mutations and analyze the effects of identified mutations on protein function in vitro. METHODS Participants included 84 unrelated children with CPP (79 girls, 5 boys) and, when available, their first-degree relatives. Five academic medical institutions participated. Sanger sequencing of MKRN3 and DLK1 5' upstream flanking and coding regions was performed on DNA extracted from peripheral blood leukocytes. Western blot analysis was performed to assess protein ubiquitination profiles. RESULTS Eight heterozygous MKRN3 mutations were identified in 9 unrelated girls with CPP. Five are novel missense mutations, 2 were previously identified in patients with CPP, and 1 is a frameshift variant not previously associated with CPP. No pathogenic variants were identified in DLK1. Girls with MKRN3 mutations had an earlier age of initial pubertal signs and higher basal serum luteinizing hormone and follicle-stimulating hormone compared to girls with CPP without MRKN3 mutations. Western blot analysis revealed that compared to wild-type MKRN3, mutations within the RING finger domain reduced ubiquitination whereas the mutations outside this domain increased ubiquitination. CONCLUSION MKRN3 mutations were present in 10.7% of our CPP cohort, consistent with previous studies. The novel identified mutations in different domains of MKRN3 revealed different patterns of ubiquitination, suggesting distinct molecular mechanisms by which the loss of MRKN3 results in early pubertal onset.
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Affiliation(s)
- John C Magnotto
- Division of Endocrinology, Diabetes and Hypertension, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115, USA
| | - Alessandra Mancini
- Division of Endocrinology, Diabetes and Hypertension, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115, USA
| | - Keisha Bird
- Division of Endocrinology, Diabetes, and Metabolism, Nemours Children's Health, Jacksonville, FL 32207, USA
| | - Luciana Montenegro
- Unidade de Endocrinologia do Desenvolvimento, Laboratório de Hormônios e Genética Molecular/LIM42, Hospital das Clínicas, Disciplina de Endocrinologia, Faculdade de Medicina da Universidade de São Paulo, São Paulo 01246-903, Brazil
| | - Filiz Tütüncüler
- Department of Pediatrics and Pediatric Endocrinology Unit, Trakya University Faculty of Medicine, Edirne 22030, Turkey
| | - Sidney A Pereira
- Division of Endocrinology, Diabetes and Hypertension, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115, USA
| | - Vitoria Simas
- Division of Endocrinology, Diabetes and Hypertension, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115, USA
| | - Leonardo Garcia
- Division of Endocrinology, Diabetes and Hypertension, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115, USA
| | - Stephanie A Roberts
- Division of Endocrinology, Diabetes and Hypertension, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115, USA
- Division of Endocrinology, Boston Children's Hospital, Boston, MA 02115, USA
| | - Delanie Macedo
- Division of Endocrinology, Diabetes and Hypertension, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115, USA
| | - Melissa Magnuson
- Division of Endocrinology, Diabetes and Hypertension, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115, USA
| | - Priscila Gagliardi
- Division of Endocrinology, Diabetes, and Metabolism, Nemours Children's Health, Jacksonville, FL 32207, USA
| | - Nelly Mauras
- Division of Endocrinology, Diabetes, and Metabolism, Nemours Children's Health, Jacksonville, FL 32207, USA
| | - Selma F Witchel
- Pediatric Endocrinology, UPMC Children's Hospital of Pittsburgh, University of Pittsburgh, Pittsburgh, PA 15224, USA
| | - Rona S Carroll
- Division of Endocrinology, Diabetes and Hypertension, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115, USA
| | - Ana Claudia Latronico
- Unidade de Endocrinologia do Desenvolvimento, Laboratório de Hormônios e Genética Molecular/LIM42, Hospital das Clínicas, Disciplina de Endocrinologia, Faculdade de Medicina da Universidade de São Paulo, São Paulo 01246-903, Brazil
| | - Ursula B Kaiser
- Division of Endocrinology, Diabetes and Hypertension, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115, USA
| | - Ana Paula Abreu
- Division of Endocrinology, Diabetes and Hypertension, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115, USA
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13
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Meng K, Lu S, Li Y, Hu L, Zhang J, Cao Y, Wang Y, Zhang CZ, He Q. LINC00493-encoded microprotein SMIM26 exerts anti-metastatic activity in renal cell carcinoma. EMBO Rep 2023; 24:e56282. [PMID: 37009826 PMCID: PMC10240204 DOI: 10.15252/embr.202256282] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2022] [Revised: 03/08/2023] [Accepted: 03/17/2023] [Indexed: 04/04/2023] Open
Abstract
Human microproteins encoded by long non-coding RNAs (lncRNA) have been increasingly discovered, however, complete functional characterization of these emerging proteins is scattered. Here, we show that LINC00493-encoded SMIM26, an understudied microprotein localized in mitochondria, is tendentiously downregulated in clear cell renal cell carcinoma (ccRCC) and correlated with poor overall survival. LINC00493 is recognized by RNA-binding protein PABPC4 and transferred to ribosomes for translation of a 95-amino-acid protein SMIM26. SMIM26, but not LINC00493, suppresses ccRCC growth and metastatic lung colonization by interacting with acylglycerol kinase (AGK) and glutathione transport regulator SLC25A11 via its N-terminus. This interaction increases the mitochondrial localization of AGK and subsequently inhibits AGK-mediated AKT phosphorylation. Moreover, the formation of the SMIM26-AGK-SCL25A11 complex maintains mitochondrial glutathione import and respiratory efficiency, which is abrogated by AGK overexpression or SLC25A11 knockdown. This study functionally characterizes the LINC00493-encoded microprotein SMIM26 and establishes its anti-metastatic role in ccRCC, and therefore illuminates the importance of hidden proteins in human cancers.
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Affiliation(s)
- Kun Meng
- MOE Key Laboratory of Tumor Molecular Biology and Key Laboratory of Functional Protein Research of Guangdong Higher Education Institutes, Institute of Life and Health Engineering, College of Life Science and Technology, Jinan UniversityGuangzhouChina
- The First Affiliated Hospital of Jinan University and MOE Key Laboratory of Tumor Molecular Biology, Jinan UniversityGuangzhouChina
| | - Shaohua Lu
- MOE Key Laboratory of Tumor Molecular Biology and Key Laboratory of Functional Protein Research of Guangdong Higher Education Institutes, Institute of Life and Health Engineering, College of Life Science and Technology, Jinan UniversityGuangzhouChina
- Sino‐French Hoffmann Institute, School of Basic Medical Sciences, State Key Laboratory of Respiratory DiseaseGuangzhou Medical UniversityGuangzhouChina
| | - Yu‐Ying Li
- MOE Key Laboratory of Tumor Molecular Biology and Key Laboratory of Functional Protein Research of Guangdong Higher Education Institutes, Institute of Life and Health Engineering, College of Life Science and Technology, Jinan UniversityGuangzhouChina
| | - Li‐Ling Hu
- MOE Key Laboratory of Tumor Molecular Biology and Key Laboratory of Functional Protein Research of Guangdong Higher Education Institutes, Institute of Life and Health Engineering, College of Life Science and Technology, Jinan UniversityGuangzhouChina
| | - Jing Zhang
- MOE Key Laboratory of Tumor Molecular Biology and Key Laboratory of Functional Protein Research of Guangdong Higher Education Institutes, Institute of Life and Health Engineering, College of Life Science and Technology, Jinan UniversityGuangzhouChina
- The First Affiliated Hospital of Jinan University and MOE Key Laboratory of Tumor Molecular Biology, Jinan UniversityGuangzhouChina
| | - Yun Cao
- Department of Pathology, State Key Laboratory of Oncology in South ChinaSun Yat‐sen University Cancer CenterGuangzhouChina
| | - Yang Wang
- MOE Key Laboratory of Tumor Molecular Biology and Key Laboratory of Functional Protein Research of Guangdong Higher Education Institutes, Institute of Life and Health Engineering, College of Life Science and Technology, Jinan UniversityGuangzhouChina
| | - Chris Zhiyi Zhang
- MOE Key Laboratory of Tumor Molecular Biology and Key Laboratory of Functional Protein Research of Guangdong Higher Education Institutes, Institute of Life and Health Engineering, College of Life Science and Technology, Jinan UniversityGuangzhouChina
| | - Qing‐Yu He
- MOE Key Laboratory of Tumor Molecular Biology and Key Laboratory of Functional Protein Research of Guangdong Higher Education Institutes, Institute of Life and Health Engineering, College of Life Science and Technology, Jinan UniversityGuangzhouChina
- The First Affiliated Hospital of Jinan University and MOE Key Laboratory of Tumor Molecular Biology, Jinan UniversityGuangzhouChina
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14
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Li J, Pei M, Xiao W, Liu X, Hong L, Yu Z, Peng Y, Zhang J, Yang P, Lin J, Wu X, Lin Z, Tang W, Zhi F, Li G, Xiang L, Li A, Liu S, Chen Y, Wang J. The HOXD9-mediated PAXIP1-AS1 regulates gastric cancer progression through PABPC1/PAK1 modulation. Cell Death Dis 2023; 14:341. [PMID: 37225681 DOI: 10.1038/s41419-023-05862-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2022] [Revised: 05/06/2023] [Accepted: 05/15/2023] [Indexed: 05/26/2023]
Abstract
Long non-coding RNAs (lncRNAs) have been functionally characterised in various diseases. LncRNA PAX-interacting protein 1-antisense RNA 1 (PAXIP1-AS1) has reportedly been associated with cancer development. However, its role in gastric cancer (GC) remains poorly understood. Here, we showed that PAXIP1-AS1 was transcriptionally repressed by homeobox D9 (HOXD9) and was significantly downregulated in GC tissues and cells. Decreased expression of PAXIP1-AS1 was positively correlated with tumour progression, while PAXIP1-AS1 overexpression inhibited cell growth and metastasis both in vitro and in vivo. PAXIP1-AS1 overexpression significantly attenuated HOXD9-enhanced epithelial-to-mesenchymal transition (EMT), invasion and metastasis in GC cells. Poly(A)-binding protein cytoplasmic 1 (PABPC1), an RNA-binding protein, was found to enhance the stability of PAK1 mRNA, leading to EMT progress and GC metastasis. PAXIP1-AS1 was found to directly bind to and destabilise PABPC1, thereby regulating EMT and metastasis of GC cells. In summary, PAXIP1-AS1 suppressed metastasis, and the HOXD9/PAXIP1-AS1/PABPC1/PAK1 signalling axis may be involved in the progression of GC.
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Affiliation(s)
- Jiaying Li
- Guangdong Provincial Key Laboratory of Gastroenterology, Department of Gastroenterology, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China
| | - Miaomiao Pei
- Guangdong Provincial Key Laboratory of Gastroenterology, Department of Gastroenterology, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China
| | - Wushuang Xiao
- Guangdong Provincial Key Laboratory of Gastroenterology, Department of Gastroenterology, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China
| | - Xuehua Liu
- Guangdong Provincial Key Laboratory of Gastroenterology, Department of Gastroenterology, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China
- Department of Gastroenterology, Shunde Hospital, Southern Medical University, Foshan, 528300, China
| | - Linjie Hong
- Guangdong Provincial Key Laboratory of Gastroenterology, Department of Gastroenterology, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China
| | - Zhen Yu
- Guangdong Provincial Key Laboratory of Gastroenterology, Department of Gastroenterology, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China
| | - Ying Peng
- Guangdong Provincial Key Laboratory of Gastroenterology, Department of Gastroenterology, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China
| | - Jieming Zhang
- Guangdong Provincial Key Laboratory of Gastroenterology, Department of Gastroenterology, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China
| | - Ping Yang
- Guangdong Provincial Key Laboratory of Gastroenterology, Department of Gastroenterology, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China
| | - Jianjiao Lin
- Department of Gastroenterology, The Second Affiliated Hospital, School of Medicine, The Chinese University of Hong Kong, Shenzhen & Longgang District People's Hospital of Shenzhen, Shenzhen, 518172, China
| | - Xiaosheng Wu
- Guangdong Provincial Key Laboratory of Gastroenterology, Department of Gastroenterology, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China
| | - Zhizhao Lin
- Guangdong Provincial Key Laboratory of Gastroenterology, Department of Gastroenterology, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China
| | - Weimei Tang
- Guangdong Provincial Key Laboratory of Gastroenterology, Department of Gastroenterology, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China
| | - Fachao Zhi
- Guangdong Provincial Key Laboratory of Gastroenterology, Department of Gastroenterology, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China
| | - Guoxin Li
- Department of General Surgery, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China
| | - Li Xiang
- Department of Gastroenterology, The Second Affiliated Hospital, School of Medicine, The Chinese University of Hong Kong, Shenzhen & Longgang District People's Hospital of Shenzhen, Shenzhen, 518172, China
| | - Aimin Li
- Guangdong Provincial Key Laboratory of Gastroenterology, Department of Gastroenterology, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China.
| | - Side Liu
- Guangdong Provincial Key Laboratory of Gastroenterology, Department of Gastroenterology, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China.
| | - Ye Chen
- Department of Gastroenterology, Integrative Clinical Microecology Center, Shenzhen Hospital, Southern Medical University, Shenzhen, 518000, China.
| | - Jide Wang
- Guangdong Provincial Key Laboratory of Gastroenterology, Department of Gastroenterology, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China.
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15
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Naulé L, Mancini A, Pereira SA, Gassaway BM, Lydeard JR, Magnotto JC, Kim HK, Liang J, Matos C, Gygi SP, Merkle FT, Carroll RS, Abreu AP, Kaiser UB. MKRN3 inhibits puberty onset via interaction with IGF2BP1 and regulation of hypothalamic plasticity. JCI Insight 2023; 8:e164178. [PMID: 37092553 PMCID: PMC10243807 DOI: 10.1172/jci.insight.164178] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2022] [Accepted: 02/24/2023] [Indexed: 04/25/2023] Open
Abstract
Makorin ring finger protein 3 (MKRN3) was identified as an inhibitor of puberty initiation with the report of loss-of-function mutations in association with central precocious puberty. Consistent with this inhibitory role, a prepubertal decrease in Mkrn3 expression was observed in the mouse hypothalamus. Here, we investigated the mechanisms of action of MKRN3 in the central regulation of puberty onset. We showed that MKRN3 deletion in hypothalamic neurons derived from human induced pluripotent stem cells was associated with significant changes in expression of genes controlling hypothalamic development and plasticity. Mkrn3 deletion in a mouse model led to early puberty onset in female mice. We found that Mkrn3 deletion increased the number of dendritic spines in the arcuate nucleus but did not alter the morphology of GnRH neurons during postnatal development. In addition, we identified neurokinin B (NKB) as an Mkrn3 target. Using proteomics, we identified insulin-like growth factor 2 mRNA-binding protein 1 (IGF2BP1) as another target of MKRN3. Interactome analysis revealed that IGF2BP1 interacted with MKRN3, along with several members of the polyadenylate-binding protein family. Our data show that one of the mechanisms by which MKRN3 inhibits pubertal initiation is through regulation of prepubertal hypothalamic development and plasticity, as well as through effects on NKB and IGF2BP1.
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Affiliation(s)
- Lydie Naulé
- Division of Endocrinology, Diabetes and Hypertension, Brigham and Women’s Hospital and Harvard Medical School, Boston, Massachusetts, USA
| | - Alessandra Mancini
- Division of Endocrinology, Diabetes and Hypertension, Brigham and Women’s Hospital and Harvard Medical School, Boston, Massachusetts, USA
| | - Sidney A. Pereira
- Division of Endocrinology, Diabetes and Hypertension, Brigham and Women’s Hospital and Harvard Medical School, Boston, Massachusetts, USA
| | - Brandon M. Gassaway
- Department of Cell Biology, Harvard Medical School, Boston, Massachusetts, USA
| | - John R. Lydeard
- Department of Cell Biology, Harvard Medical School, Boston, Massachusetts, USA
| | - John C. Magnotto
- Division of Endocrinology, Diabetes and Hypertension, Brigham and Women’s Hospital and Harvard Medical School, Boston, Massachusetts, USA
| | - Han Kyeol Kim
- Division of Endocrinology, Diabetes and Hypertension, Brigham and Women’s Hospital and Harvard Medical School, Boston, Massachusetts, USA
| | - Joy Liang
- Division of Endocrinology, Diabetes and Hypertension, Brigham and Women’s Hospital and Harvard Medical School, Boston, Massachusetts, USA
| | - Cynara Matos
- Division of Endocrinology, Diabetes and Hypertension, Brigham and Women’s Hospital and Harvard Medical School, Boston, Massachusetts, USA
| | - Steven P. Gygi
- Department of Cell Biology, Harvard Medical School, Boston, Massachusetts, USA
| | - Florian T. Merkle
- Metabolic Research Laboratories and Medical Research Council Metabolic Diseases Unit, Wellcome Trust – Medical Research Council Institute of Metabolic Science and
- Wellcome Trust – Medical Research Council Cambridge Stem Cell Institute, University of Cambridge, Cambridge, United Kingdom
| | - Rona S. Carroll
- Division of Endocrinology, Diabetes and Hypertension, Brigham and Women’s Hospital and Harvard Medical School, Boston, Massachusetts, USA
| | - Ana Paula Abreu
- Division of Endocrinology, Diabetes and Hypertension, Brigham and Women’s Hospital and Harvard Medical School, Boston, Massachusetts, USA
| | - Ursula B. Kaiser
- Division of Endocrinology, Diabetes and Hypertension, Brigham and Women’s Hospital and Harvard Medical School, Boston, Massachusetts, USA
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16
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Yang Y, Luo Y, Huang S, Tao Y, Li C, Wang C. MKRN1/2 serve as tumor suppressors in renal clear cell carcinoma by regulating the expression of p53. Cancer Biomark 2023; 36:267-278. [PMID: 36938725 DOI: 10.3233/cbm-210559] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/15/2023]
Abstract
BACKGROUND Kidney renal clear cell carcinoma (KIRC) belongs to renal cell carcinoma which is a very aggressive malignant tumor with poor prognosis and high mortality. The MKRN family includes three members MKRN1, MKRN2 and MKRN3, which are closely related to cancers, and have been involved in many studies. OBJECTIVE This study aimed to explore the roles of MKRN family in KIRC. METHODS The expression of MKRNs was analyzed using the UALCAN database, prognostic analysis was performed with the GEPIA2 and Kaplan-Meier Plotter database, and correlation analysis was assessed by GEPIA2. The CCK-8 and colony formation assay were performed to detect cell proliferation, wound healing assays were performed to detect cell migration, cell cycles were detected by flow cytometry analysis, GST pull-down and co-immunoprecipitation assays were performed to detect the interaction of proteins, and the expression of MKRNs, p53 and other proteins were detect by immunoblotting analysis or quantitative PCR (qPCR). RESULTS MKRN1 and MKRN2 were lowly expressed in KIRC samples compared to the corresponding normal tissues, and KIRC patients with high levels of MKRN1 and MKRN2 showed higher overall survival (OS) and disease free survival (DFS) rates. The overexpression of MKRN1 and MKRN2 inhibited the proliferation of human KIRC cells by arresting the cell cycles, but shows little effect on cells migration. The expression of MKRN1 and MKRN2 are correlated, and MKRN1 directly interacts with MKRN2. Moreover, both MKRN1 and MKRN2 were closely correlated with the expression of TP53 in KIRC tumor, and promoted the expression of p53 both at protein and mRNA levels. CONCLUSIONS Our study suggests that MKRN1 and MKRN2 serve as tumor suppressors in KIRC, and act as promising therapeutic targets for KIRC treatment.
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Affiliation(s)
- Yun Yang
- School of Medicine, Guizhou University, Guiyang, Guizhou, China.,School of Medicine, Guizhou University, Guiyang, Guizhou, China
| | - Yanyan Luo
- Department of Clinical Laboratory, Wenzhou Medical University, Wenzhou, Zhejiang, China.,School of Medicine, Guizhou University, Guiyang, Guizhou, China
| | - Shuting Huang
- State Key Laboratory of Molecular Biology, Shanghai Institute of Biochemistry and Cell Biology, Center for Excellence in Molecular Cell Science, Chinese Academy of Sciences, Shanghai, China.,University of Chinese Academy of Sciences, Beijing, China.,School of Medicine, Guizhou University, Guiyang, Guizhou, China
| | - Yonghui Tao
- State Key Laboratory of Molecular Biology, Shanghai Institute of Biochemistry and Cell Biology, Center for Excellence in Molecular Cell Science, Chinese Academy of Sciences, Shanghai, China
| | - Chuanyin Li
- Cancer Center, Shanghai Tenth People's Hospital, School of Medicine, Tongji University, Shanghai, China
| | - Chengcheng Wang
- School of Medicine, Guizhou University, Guiyang, Guizhou, China.,School of Medicine, Guizhou University, Guiyang, Guizhou, China
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17
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Brito VN, Canton APM, Seraphim CE, Abreu AP, Macedo DB, Mendonca BB, Kaiser UB, Argente J, Latronico AC. The Congenital and Acquired Mechanisms Implicated in the Etiology of Central Precocious Puberty. Endocr Rev 2023; 44:193-221. [PMID: 35930274 PMCID: PMC9985412 DOI: 10.1210/endrev/bnac020] [Citation(s) in RCA: 14] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/24/2022] [Indexed: 01/20/2023]
Abstract
The etiology of central precocious puberty (CPP) is multiple and heterogeneous, including congenital and acquired causes that can be associated with structural or functional brain alterations. All causes of CPP culminate in the premature pulsatile secretion of hypothalamic GnRH and, consequently, in the premature reactivation of hypothalamic-pituitary-gonadal axis. The activation of excitatory factors or suppression of inhibitory factors during childhood represent the 2 major mechanisms of CPP, revealing a delicate balance of these opposing neuronal pathways. Hypothalamic hamartoma (HH) is the most well-known congenital cause of CPP with central nervous system abnormalities. Several mechanisms by which hamartoma causes CPP have been proposed, including an anatomical connection to the anterior hypothalamus, autonomous neuroendocrine activity in GnRH neurons, trophic factors secreted by HH, and mechanical pressure applied to the hypothalamus. The importance of genetic and/or epigenetic factors in the underlying mechanisms of CPP has grown significantly in the last decade, as demonstrated by the evidence of genetic abnormalities in hypothalamic structural lesions (eg, hamartomas, gliomas), syndromic disorders associated with CPP (Temple, Prader-Willi, Silver-Russell, and Rett syndromes), and isolated CPP from monogenic defects (MKRN3 and DLK1 loss-of-function mutations). Genetic and epigenetic discoveries involving the etiology of CPP have had influence on the diagnosis and familial counseling providing bases for potential prevention of premature sexual development and new treatment targets in the future. Global preventive actions inducing healthy lifestyle habits and less exposure to endocrine-disrupting chemicals during the lifespan are desirable because they are potentially associated with CPP.
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Affiliation(s)
- Vinicius N Brito
- Discipline of Endocrinology & Metabolism, Department of Internal
Medicine, University of Sao Paulo Medical School, University of Sao
Paulo, Sao Paulo 01246 903, Brazil
| | - Ana P M Canton
- Discipline of Endocrinology & Metabolism, Department of Internal
Medicine, University of Sao Paulo Medical School, University of Sao
Paulo, Sao Paulo 01246 903, Brazil
| | - Carlos Eduardo Seraphim
- Discipline of Endocrinology & Metabolism, Department of Internal
Medicine, University of Sao Paulo Medical School, University of Sao
Paulo, Sao Paulo 01246 903, Brazil
| | - Ana Paula Abreu
- Division of Endocrinology, Diabetes and Hypertension, Department of
Medicine, Brigham and Women’s Hospital, Harvard Medical School,
Boston, MA 02115, USA
| | - Delanie B Macedo
- Discipline of Endocrinology & Metabolism, Department of Internal
Medicine, University of Sao Paulo Medical School, University of Sao
Paulo, Sao Paulo 01246 903, Brazil
- Division of Endocrinology, Diabetes and Hypertension, Department of
Medicine, Brigham and Women’s Hospital, Harvard Medical School,
Boston, MA 02115, USA
- Núcleo de Atenção Médica Integrada, Centro de Ciências da Saúde,
Universidade de Fortaleza, Fortaleza 60811 905,
Brazil
| | - Berenice B Mendonca
- Discipline of Endocrinology & Metabolism, Department of Internal
Medicine, University of Sao Paulo Medical School, University of Sao
Paulo, Sao Paulo 01246 903, Brazil
| | - Ursula B Kaiser
- Division of Endocrinology, Diabetes and Hypertension, Department of
Medicine, Brigham and Women’s Hospital, Harvard Medical School,
Boston, MA 02115, USA
| | - Jesús Argente
- Hospital Infantil Universitario Niño Jesús, Department of Endocrinology and
Department of Pediatrics, Universidad Autónoma de Madrid, Spanish PUBERE Registry,
CIBER of Obesity and Nutrition (CIBEROBN), Instituto de Salud Carlos III, IMDEA
Institute, Madrid 28009, Spain
| | - Ana Claudia Latronico
- Discipline of Endocrinology & Metabolism, Department of Internal
Medicine, University of Sao Paulo Medical School, University of Sao
Paulo, Sao Paulo 01246 903, Brazil
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18
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Argente J, Dunkel L, Kaiser UB, Latronico AC, Lomniczi A, Soriano-Guillén L, Tena-Sempere M. Molecular basis of normal and pathological puberty: from basic mechanisms to clinical implications. Lancet Diabetes Endocrinol 2023; 11:203-216. [PMID: 36620967 PMCID: PMC10198266 DOI: 10.1016/s2213-8587(22)00339-4] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/30/2022] [Revised: 11/05/2022] [Accepted: 11/08/2022] [Indexed: 01/07/2023]
Abstract
Puberty is a major maturational event; its mechanisms and timing are driven by genetic determinants, but also controlled by endogenous and environmental cues. Substantial progress towards elucidation of the neuroendocrine networks governing puberty has taken place. However, key aspects of the mechanisms responsible for the precise timing of puberty and its alterations have only recently begun to be deciphered, propelled by epidemiological data suggesting that pubertal timing is changing in humans, via mechanisms that are not yet understood. By integrating basic and clinical data, we provide a comprehensive overview of current advances on the physiological basis of puberty, with a particular focus on the roles of kisspeptins and other central transmitters, the underlying molecular and endocrine mechanisms, and the pathways involved in pubertal modulation by nutritional and metabolic cues. Additionally, we have summarised molecular features of precocious and delayed puberty in both sexes, as revealed by clinical and genetic studies. This Review is a synoptic up-to-date view of how puberty is controlled and of the pathogenesis of major pubertal alterations, from both a clinical and translational perspective. We also highlight unsolved challenges that will seemingly concentrate future research efforts in this active domain of endocrinology.
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Affiliation(s)
- Jesús Argente
- Department of Pediatrics & Pediatric Endocrinology, Universidad Autónoma de Madrid, University Hospital Niño Jesús, Instituto de Investigación Sanitaria La Princesa, Madrid, Spain; CIBER Fisiopatología de la Obesidad y Nutrición, Instituto de Salud Carlos III, Madrid, Spain; IMDEA Food Institute, Madrid, Spain.
| | - Leo Dunkel
- Centre for Endocrinology, William Harvey Research Institute, Barts and the London Medical School, London, UK
| | - Ursula B Kaiser
- Division of Endocrinology, Diabetes and Hypertension, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - Ana C Latronico
- Developmental Endocrinology Unit, Laboratory of Hormones and Molecular Genetics, LIM42, Department of Endocrinology and Metabolism, Faculty of Medicine, University of São Paulo, São Paulo, Brazil
| | - Alejandro Lomniczi
- Division of Neuroscience, Oregon National Primate Research Center, Oregon Health & Science University, Beaverton, OR, USA
| | - Leandro Soriano-Guillén
- Service of Pediatrics, University Hospital Fundación Jiménez Díaz, Instituto de Investigación Sanitaria-Fundación Jiménez Díaz, Universidad Autónoma de Madrid, Madrid, Spain
| | - Manuel Tena-Sempere
- CIBER Fisiopatología de la Obesidad y Nutrición, Instituto de Salud Carlos III, Madrid, Spain; Department of Cell Biology, Physiology and Immunology, University of Córdoba, Córdoba, Spain; Instituto Maimónides de Investigación Biomédica de Córdoba, Hospital Universitario Reina Sofia, Córdoba, Spain; Institute of Biomedicine, University of Turku, Turku, Finland.
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19
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Gui Z, Lv M, Han M, Li S, Mo Z. Effect of CPP-related genes on GnRH secretion and Notch signaling pathway during puberty. Biomed J 2022; 46:100575. [PMID: 36528337 DOI: 10.1016/j.bj.2022.12.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2021] [Revised: 10/11/2022] [Accepted: 12/12/2022] [Indexed: 12/23/2022] Open
Abstract
Puberty is a complex biological process of sexual development, influenced by genetic, metabolic-nutritional, environmental and socioeconomic factors, characterized by the development of secondary sexual characteristics, maturation of the gonads, leading to the acquisition of reproductive capacity. The onset of central precocious puberty (CPP) is mainly associated with the early activation of the hypothalamic-pituitary-gonadal (HPG) axis and increased secretion of gonadotropin-releasing hormone (GnRH), leading to increased pituitary secretion of luteinizing hormone (LH) and follicle-stimulating hormone (FSH) and activation of gonadal function. Due to the expense and invasiveness of current diagnostic testing and drug therapies for CPP, it would be helpful to find serum and genetic markers to facilitate diagnosis. In this paper, we summarized the related factors that may affect the expression of GnRH1 gene and the secretion and action pathway of GnRH and related sex hormones, and found several potential targets, such as MKRN3, DLK1 and KISS1. Although, the specific mechanism still needs to be further studied, we would be encouraged if the insights from this review could provide new insights for future research and clinical diagnosis and treatment of CPP.
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Affiliation(s)
- Zihao Gui
- Guangxi Provincial Postgraduate Co-training Base for Collaborative Innovation in Basic Medicine, Department of Histology and Embryology, Guilin Medical University, Guilin, Guangxi, China; Clinical Medicine of Hengyang Medical School, University of South China, Hengyang, China
| | - Mei Lv
- Guangxi Provincial Postgraduate Co-training Base for Collaborative Innovation in Basic Medicine, Department of Histology and Embryology, Guilin Medical University, Guilin, Guangxi, China; Anshun City People's Hospital, Anshun, Guizhou, China
| | - Min Han
- Clinical Medicine of Hengyang Medical School, University of South China, Hengyang, China
| | - Shan Li
- Guangxi Provincial Postgraduate Co-training Base for Collaborative Innovation in Basic Medicine, Department of Histology and Embryology, Guilin Medical University, Guilin, Guangxi, China
| | - Zhongcheng Mo
- Guangxi Provincial Postgraduate Co-training Base for Collaborative Innovation in Basic Medicine, Department of Histology and Embryology, Guilin Medical University, Guilin, Guangxi, China; Guangxi Health Commission Key Laboratory of Basic Research in Sphingolipid Metabolism Related Diseases, The Affiliated Hospital of Guilin Medical University, Guilin, Guangxi, China.
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Abstract
Mammalian poly A-binding proteins (PABPs) are highly conserved multifunctional RNA-binding proteins primarily involved in the regulation of mRNA translation and stability, of which PABPC1 is considered a central regulator of cytoplasmic mRNA homing and is involved in a wide range of physiological and pathological processes by regulating almost every aspect of RNA metabolism. Alterations in its expression and function disrupt intra-tissue homeostasis and contribute to the development of various tumors. There is increasing evidence that PABPC1 is aberrantly expressed in a variety of tumor tissues and cancers such as lung, gastric, breast, liver, and esophageal cancers, and PABPC1 might be used as a potential biomarker for tumor diagnosis, treatment, and clinical application in the future. In this paper, we review the abnormal expression, functional role, and molecular mechanism of PABPC1 in tumorigenesis and provide directions for further understanding the regulatory role of PABPC1 in tumor cells.
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Affiliation(s)
- Ya Qi
- Department of Gynecology and Obstetrics, Shengjing Hospital Affiliated of China Medical University, Shenyang, Liaoning, China
| | - Min Wang
- Department of Gynecology and Obstetrics, Shengjing Hospital Affiliated of China Medical University, Shenyang, Liaoning, China
| | - Qi Jiang
- Second Department of Clinical Medicine, China Medical University, Shenyang, Liaoning, China
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21
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Roberts SA, Naulé L, Chouman S, Johnson T, Johnson M, Carroll RS, Navarro VM, Kaiser UB. Hypothalamic Overexpression of Makorin Ring Finger Protein 3 Results in Delayed Puberty in Female Mice. Endocrinology 2022; 163:bqac132. [PMID: 35974456 PMCID: PMC10233297 DOI: 10.1210/endocr/bqac132] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/06/2022] [Indexed: 11/19/2022]
Abstract
Makorin ring finger protein 3 (MKRN3) is an important neuroendocrine player in the control of pubertal timing and upstream inhibitor of gonadotropin-releasing hormone secretion. In mice, expression of Mkrn3 in the hypothalamic arcuate and anteroventral periventricular nucleus is high early in life and declines before the onset of puberty. Therefore, we aimed to explore if the persistence of hypothalamic Mkrn3 expression peripubertally would result in delayed puberty. Female mice that received neonatal bilateral intracerebroventricular injections of a recombinant adeno-associated virus expressing Mkrn3 had delayed vaginal opening and first estrus compared with animals injected with control virus. Subsequent estrous cycles and fertility were normal. Interestingly, male mice treated similarly did not exhibit delayed puberty onset. Kiss1, Tac2, and Pdyn mRNA levels were increased in the mediobasal hypothalamus in females at postnatal day 28, whereas kisspeptin and neurokinin B protein levels in the arcuate nucleus were decreased, following Mkrn3 overexpression, compared to controls. Cumulatively, these data suggest that Mkrn3 may directly or indirectly target neuropeptides of Kiss1 neurons to degradation pathways. This mouse model suggests that MKRN3 may be a potential contributor to delayed onset of puberty, in addition to its well-established roles in central precocious puberty and the timing of menarche.
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Affiliation(s)
- Stephanie A Roberts
- Division of Endocrinology, Boston Children’s Hospital, Boston, MA 02115, USA
- Division of Endocrinology, Diabetes and Hypertension, Brigham and Women’s Hospital, Boston, MA 02115, USA
- Harvard Medical School, Boston, MA 02115, USA
| | - Lydie Naulé
- Division of Endocrinology, Diabetes and Hypertension, Brigham and Women’s Hospital, Boston, MA 02115, USA
| | - Soukayna Chouman
- Division of Endocrinology, Diabetes and Hypertension, Brigham and Women’s Hospital, Boston, MA 02115, USA
| | - Tatyana Johnson
- Division of Endocrinology, Diabetes and Hypertension, Brigham and Women’s Hospital, Boston, MA 02115, USA
| | - Marciana Johnson
- Division of Endocrinology, Diabetes and Hypertension, Brigham and Women’s Hospital, Boston, MA 02115, USA
| | - Rona S Carroll
- Division of Endocrinology, Diabetes and Hypertension, Brigham and Women’s Hospital, Boston, MA 02115, USA
- Harvard Medical School, Boston, MA 02115, USA
| | - Victor M Navarro
- Division of Endocrinology, Diabetes and Hypertension, Brigham and Women’s Hospital, Boston, MA 02115, USA
- Harvard Medical School, Boston, MA 02115, USA
| | - Ursula B Kaiser
- Division of Endocrinology, Diabetes and Hypertension, Brigham and Women’s Hospital, Boston, MA 02115, USA
- Harvard Medical School, Boston, MA 02115, USA
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22
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Yang E, Huang S, Jami-Alahmadi Y, McInerney GM, Wohlschlegel JA, Li MMH. Elucidation of TRIM25 ubiquitination targets involved in diverse cellular and antiviral processes. PLoS Pathog 2022; 18:e1010743. [PMID: 36067236 PMCID: PMC9481182 DOI: 10.1371/journal.ppat.1010743] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2022] [Revised: 09/16/2022] [Accepted: 07/15/2022] [Indexed: 11/19/2022] Open
Abstract
The tripartite motif (TRIM) family of E3 ubiquitin ligases is well known for its roles in antiviral restriction and innate immunity regulation, in addition to many other cellular pathways. In particular, TRIM25-mediated ubiquitination affects both carcinogenesis and antiviral response. While individual substrates have been identified for TRIM25, it remains unclear how it regulates diverse processes. Here we characterized a mutation, R54P, critical for TRIM25 catalytic activity, which we successfully utilized to "trap" substrates. We demonstrated that TRIM25 targets proteins implicated in stress granule formation (G3BP1/2), nonsense-mediated mRNA decay (UPF1), nucleoside synthesis (NME1), and mRNA translation and stability (PABPC4). The R54P mutation abolishes TRIM25 inhibition of alphaviruses independently of the host interferon response, suggesting that this antiviral effect is a direct consequence of ubiquitination. Consistent with that, we observed diminished antiviral activity upon knockdown of several TRIM25-R54P specific interactors including NME1 and PABPC4. Our findings highlight that multiple substrates mediate the cellular and antiviral activities of TRIM25, illustrating the multi-faceted role of this ubiquitination network in modulating diverse biological processes.
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Affiliation(s)
- Emily Yang
- Molecular Biology Institute, University of California, Los Angeles, California, United States of America
- Department of Microbiology, Immunology and Molecular Genetics, University of California, Los Angeles, California, United States of America
| | - Serina Huang
- Department of Human Genetics, David Geffen School of Medicine, University of California, Los Angeles, California, United States of America
| | - Yasaman Jami-Alahmadi
- Department of Biological Chemistry, David Geffen School of Medicine, University of California, Los Angeles, California, United States of America
| | - Gerald M. McInerney
- Department of Microbiology, Tumor, and Cell Biology, Karolinska Institutet, Stockholm, Sweden
| | - James A. Wohlschlegel
- Department of Biological Chemistry, David Geffen School of Medicine, University of California, Los Angeles, California, United States of America
| | - Melody M. H. Li
- Molecular Biology Institute, University of California, Los Angeles, California, United States of America
- Department of Microbiology, Immunology and Molecular Genetics, University of California, Los Angeles, California, United States of America
- AIDS Institute, David Geffen School of Medicine, University of California, Los Angeles, California, United States of America
- * E-mail:
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23
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Meyrueix LP, Gharaibeh R, Xue J, Brouwer C, Jones C, Adair L, Norris SA, Ideraabdullah F. Gestational diabetes mellitus placentas exhibit epimutations at placental development genes. Epigenetics 2022; 17:2157-2177. [DOI: 10.1080/15592294.2022.2111751] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
Affiliation(s)
| | - Raad Gharaibeh
- Department of Bioinformatics and Genomics, University of North Carolina, Charlotte, NC, USA
- Bioinformatics Service Division, University of North Carolina, Charlotte, NC, USA
- Department of Medicine, Division of Gastroenterology, University of Florida, Gainesville, FL, USA
| | - Jing Xue
- Genetics Department, University of North Carolina, Chapel Hill, NC, USA
| | - Cory Brouwer
- Department of Bioinformatics and Genomics, University of North Carolina, Charlotte, NC, USA
- Bioinformatics Service Division, University of North Carolina, Charlotte, NC, USA
| | - Corbin Jones
- Department of Biology and Integrative Program for Biological and Genome Sciences, University of North Carolina, Chapel Hill, NC, USA
| | - Linda Adair
- Nutrition Department, University of North Carolina, Chapel Hill, NC, USA
| | - Shane A. Norris
- SAMRC Developmental Health Pathways for Health Research Unit, University of Witwatersrand, Johannesburg, South Africa
| | - Folami Ideraabdullah
- Nutrition Department, University of North Carolina, Chapel Hill, NC, USA
- Genetics Department, University of North Carolina, Chapel Hill, NC, USA
- SAMRC Developmental Health Pathways for Health Research Unit, University of Witwatersrand, Johannesburg, South Africa
- Nutrition Research Institute, University of North Carolina, Chapel Hill, NC, USA
- Lineberger Comprehensive Cancer Center, University of North Carolina, Chapel Hill, NC, USA
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24
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Shen Y, Zhang H, Ni Y, Wang X, Chen Y, Chen J, Wang Y, Lin J, Xu Y, Zhao JY, Cheng L. Tripartite motif 25 ameliorates doxorubicin-induced cardiotoxicity by degrading p85α. Cell Death Dis 2022; 13:643. [PMID: 35871160 DOI: 10.1038/s41419-022-05100-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2022] [Revised: 07/08/2022] [Accepted: 07/13/2022] [Indexed: 02/06/2023]
Abstract
Doxorubicin (DOX)-based chemotherapy is widely used to treat malignant tumors; however, the cardiotoxicity induced by DOX restricts its clinical usage. A therapeutic dose of DOX can activate ubiquitin-proteasome system. However, whether and how ubiquitin-proteasome system brings out DOX-induced cardiotoxicity remains to be investigated. Here we conducted a proteomics analysis of a DOX-induced cardiotoxicity model to screen the potentially ubiquitination-related molecules. Dysregulated TRIM25 was found to contribute to the cardiotoxicity. In vivo and in vitro cardiotoxicity experiments revealed that TRIM25 ameliorated DOX-induced cardiotoxicity. Electron microscopy and endoplasmic reticulum stress markers revealed that TRIM25 mitigated endoplasmic reticulum stress and apoptosis in DOX-induced cardiomyocytes. Mechanistically, the Co-immunoprecipitation assays and CHX pulse-chase experiment determined that TRIM25 affected p85α stability and promoted its ubiquitination and degradation. This leads to increase of nuclear translocation of XBP-1s, which mitigates endoplasmic reticulum stress. These findings reveal that TRIM25 may have a therapeutic role for DOX-induced cardiotoxicity.
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25
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Abstract
Pubertal onset is known to result from reactivation of the hypothalamic-pituitary-gonadal (HPG) axis, which is controlled by complex interactions of genetic and nongenetic factors. Most cases of precocious puberty (PP) are diagnosed as central PP (CPP), defined as premature activation of the HPG axis. The cause of CPP in most girls is not identifiable and, thus, referred to as idiopathic CPP (ICPP), whereas boys are more likely to have an organic lesion in the brain. ICPP has a genetic background, as supported by studies showing that maternal age at menarche is associated with pubertal timing in their offspring. A gain of expression in the kisspeptin gene (KISS1), gain-of-function mutation in the kisspeptin receptor gene (KISS1R), loss-of-function mutation in makorin ring finger protein 3 (MKRN3), and loss-of-function mutations in the delta-like homolog 1 gene (DLK1) have been associated with ICPP. Other genes, such as gamma-aminobutyric acid receptor subunit alpha-1 (GABRA1), lin-28 homolog B (LIN28B), neuropeptide Y (NPYR), tachykinin 3 (TAC3), and tachykinin receptor 3 (TACR3), have been implicated in the progression of ICPP, although their relationships require elucidation. Environmental and socioeconomic factors may also be correlated with ICPP. In the progression of CPP, epigenetic factors such as DNA methylation, histone posttranslational modifications, and noncoding ribonucleic acids may mediate the relationship between genetic and environmental factors. CPP is correlated with short- and long-term adverse health outcomes, which forms the rationale for research focusing on understanding its genetic and nongenetic factors.
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Affiliation(s)
- Young Suk Shim
- Department of Pediatrics, Ajou University Hospital, Ajou University School of Medicine, Suwon, Korea
| | - Hae Sang Lee
- Department of Pediatrics, Ajou University Hospital, Ajou University School of Medicine, Suwon, Korea
| | - Jin Soon Hwang
- Department of Pediatrics, Ajou University Hospital, Ajou University School of Medicine, Suwon, Korea
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26
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Kaneko-Ishino T, Ishino F. The Evolutionary Advantage in Mammals of the Complementary Monoallelic Expression Mechanism of Genomic Imprinting and Its Emergence From a Defense Against the Insertion Into the Host Genome. Front Genet 2022; 13:832983. [PMID: 35309133 PMCID: PMC8928582 DOI: 10.3389/fgene.2022.832983] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2021] [Accepted: 02/11/2022] [Indexed: 12/30/2022] Open
Abstract
In viviparous mammals, genomic imprinting regulates parent-of-origin-specific monoallelic expression of paternally and maternally expressed imprinted genes (PEGs and MEGs) in a region-specific manner. It plays an essential role in mammalian development: aberrant imprinting regulation causes a variety of developmental defects, including fetal, neonatal, and postnatal lethality as well as growth abnormalities. Mechanistically, PEGs and MEGs are reciprocally regulated by DNA methylation of germ-line differentially methylated regions (gDMRs), thereby exhibiting eliciting complementary expression from parental genomes. The fact that most gDMR sequences are derived from insertion events provides strong support for the claim that genomic imprinting emerged as a host defense mechanism against the insertion in the genome. Recent studies on the molecular mechanisms concerning how the DNA methylation marks on the gDMRs are established in gametes and maintained in the pre- and postimplantation periods have further revealed the close relationship between genomic imprinting and invading DNA, such as retroviruses and LTR retrotransposons. In the presence of gDMRs, the monoallelic expression of PEGs and MEGs confers an apparent advantage by the functional compensation that takes place between the two parental genomes. Thus, it is likely that genomic imprinting is a consequence of an evolutionary trade-off for improved survival. In addition, novel genes were introduced into the mammalian genome via this same surprising and complex process as imprinted genes, such as the genes acquired from retroviruses as well as those that were duplicated by retropositioning. Importantly, these genes play essential/important roles in the current eutherian developmental system, such as that in the placenta and/or brain. Thus, genomic imprinting has played a critically important role in the evolutionary emergence of mammals, not only by providing a means to escape from the adverse effects of invading DNA with sequences corresponding to the gDMRs, but also by the acquisition of novel functions in development, growth and behavior via the mechanism of complementary monoallelic expression.
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Affiliation(s)
- Tomoko Kaneko-Ishino
- School of Medicine, Tokai University, Isehara, Japan
- *Correspondence: Tomoko Kaneko-Ishino, ; Fumitoshi Ishino,
| | - Fumitoshi Ishino
- Research Institute, Tokyo Medical and Dental University, Tokyo, Japan
- *Correspondence: Tomoko Kaneko-Ishino, ; Fumitoshi Ishino,
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27
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Song D, Li S, Ning L, Zhang S, Cai Y. Smurf2 suppresses the metastasis of hepatocellular carcinoma via ubiquitin degradation of Smad2. Open Med (Wars) 2022; 17:384-396. [PMID: 35509688 PMCID: PMC8874264 DOI: 10.1515/med-2022-0437] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2021] [Revised: 12/27/2021] [Accepted: 01/17/2022] [Indexed: 11/15/2022] Open
Abstract
Purpose Smurf2, one of C2-WW-HECT domain E3 ubiquitin ligases, is closely related to the development and progression in different cancer types, including hepatocellular carcinoma (HCC). This study aims to illustrate the expression and molecular mechanism of Smurf2 in regulating the progression of HCC. Methods The expression of Smurf2 in human HCC and adjacent non-tumor liver specimens was detected using tissue microarray studies from 220 HCC patients who underwent curative resection. The relationships of Smurf2 and HCC progression and survival were analyzed using the chi-square test, Kaplan–Meier analysis, and Cox proportional hazards model. For Smurf2 was low expression in HCC cell lines, Smurf2 overexpression cell lines were established. The effect of Smurf2 on cell proliferation and migration was detected by Cell Counting Kit-8 and colony formation assay, and the epithelial–mesenchymal transition (EMT) markers and its transcription factors were tested by immunoblotting. The interaction and ubiquitination of Smad2 by Smurf2 were detected by co-immunoprecipitation and immunoprecipitation assay. Finally, the effect of Smurf2 on HCC was verified using the mouse lung metastasis model. Results Smurf2 was downregulated in HCC tissues compared to that of corresponding non-tumor liver specimens. The low expression of Smurf2 in HCC was significantly associated with macrovascular or microvascular tumor thrombus and the impairment of overall survival and disease-free survival. In vitro and in vivo analysis showed that Smurf2 overexpression decreased the EMT potential of HCC cells by promoting the ubiquitination of Smad2 via the proteasome-dependent degradation pathway. Conclusion The expression of Smurf2 was downregulated in HCC specimens and affected the survival of patients. Smurf2 inhibited the EMT of HCC by enhancing Smad2 ubiquitin-dependent proteasome degradation.
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Affiliation(s)
- Dongqiang Song
- Liver Cancer Institute, Zhongshan Hospital of Fudan University , Xuhui District , Shanghai , P. R. China
| | - Shuyu Li
- Department of Gastroenterology and Hepatology, Zhongshan Hospital of Fudan University , Xuhui District , Shanghai , P. R. China
| | - Liuxin Ning
- Department of Gastroenterology and Hepatology, Zhongshan Hospital of Fudan University , Xuhui District , Shanghai , P. R. China
| | - Shuncai Zhang
- Department of Gastroenterology and Hepatology, Zhongshan Hospital of Fudan University , Xuhui District , Shanghai , P. R. China
| | - Yu Cai
- Department of Gastroenterology and Hepatology, Zhongshan Hospital of Fudan University , Xuhui District , Shanghai , P. R. China
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Liao Y, Sumara I, Pangou E. Non-proteolytic ubiquitylation in cellular signaling and human disease. Commun Biol 2022; 5:114. [PMID: 35136173 DOI: 10.1038/s42003-022-03060-1] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2021] [Accepted: 01/18/2022] [Indexed: 12/18/2022] Open
Abstract
Ubiquitylation is one of the most common post-translational modifications (PTMs) of proteins that frequently targets substrates for proteasomal degradation. However it can also result in non-proteolytic events which play important functions in cellular processes such as intracellular signaling, membrane trafficking, DNA repair and cell cycle. Emerging evidence demonstrates that dysfunction of non-proteolytic ubiquitylation is associated with the development of multiple human diseases. In this review, we summarize the current knowledge and the latest concepts on how non-proteolytic ubiquitylation pathways are involved in cellular signaling and in disease-mediating processes. Our review, may advance our understanding of the non-degradative ubiquitylation process. Evanthia Pangou and co-authors review recent insights into the important roles of non-proteolytic ubiquitylation in cellular signaling as well as in physiology and disease.
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Ye J, Yan X, Qin P, Gong X, Li H, Liu Y, Yu T, Zhang Y, Ling Y, Cao H, Li Y, Fang F. Proteomic analysis of hypothalamus in prepubertal and pubertal female goat. J Proteomics 2022; 251:104411. [PMID: 34728423 DOI: 10.1016/j.jprot.2021.104411] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2021] [Revised: 09/28/2021] [Accepted: 10/19/2021] [Indexed: 12/12/2022]
Abstract
The functions of proteins at the onset of puberty in goats remain largely unexplored. To identify the proteins regulating puberty in goats, we analysed protein abundance and pathways in the hypothalamus of female goats. We applied tandem mass tag (TMT) labelling, liquid chromatography-tandem mass spectrometry (LC-MS/MS), and parallel reaction monitoring (PRM) to examine hypothalamus of pubertal (cases; n = 3) and prepubertal (controls; n = 3) goats. We identified 5119 proteins, including 69 differentially abundant proteins (DAPs), of which 35 were upregulated and 34 were downregulated. Fourteen DAPs were randomly selected to verify these results using PRM, and the results were consistent with the TMT quantitative results. DAPs were enriched in MAPK signalling pathway, Ras signalling pathway, Autophagy-animal, Endocytosis, and PI3K/Akt/mTOR signalling pathway categories. These pathways are related to embryogenesis, cell proliferation, cell differentiation, and promoting the release of gonadotropin-releasing hormone (GnRH) in the hypothalamus. In particular, PDGFRβ and MAP3K7 occupied important locations in the protein-protein interaction network. The results demonstrate that DAPs and their related signalling pathways are crucial in regulating puberty in goats. However, further research is needed to explore the functions of DAPs and their pathways to provide new insights into the mechanism of puberty onset. SIGNIFICANCE: In domestic animals, reaching the age of puberty is an event that contributes significantly to lifetime reproductive potential. And the hypothalamus functions directly in the complex systemic changes that control puberty. Our study was the first TMT proteomics analysis on hypothalamus tissues of pubertal goats, which revealed the changes of protein and pathways that are related to the onset of puberty. We identified 69 DAPs, which were enriched in the MAPK signaling pathway, the Ras signaling pathway, and the IGF-1/PI3K/Akt/mTOR pathway, suggesting that these processes were probably involved in the onset of puberty.
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Palumbo S, Cirillo G, Aiello F, Papparella A, Miraglia del Giudice E, Grandone A. MKRN3 role in regulating pubertal onset: the state of art of functional studies. Front Endocrinol (Lausanne) 2022; 13:991322. [PMID: 36187104 PMCID: PMC9523110 DOI: 10.3389/fendo.2022.991322] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/11/2022] [Accepted: 08/23/2022] [Indexed: 11/25/2022] Open
Abstract
Puberty is a critical process characterized by several physical and psychological changes that culminate in the achievement of sexual maturation and fertility. The onset of puberty depends on several incompletely understood mechanisms that certainly involve gonadotropin-releasing hormone (GnRH) and its effects on the pituitary gland. The role of makorin ring finger protein 3 (MKRN3) in the regulation of pubertal timing was revealed when loss-of-function mutations were identified in patients with central precocious puberty (CPP), which to date, represent the most commonly known genetic cause of this condition. The MKRN3 gene showed ubiquitous expression in tissues from a broad spectrum of species, suggesting an important cellular role. Its involvement in the initiation of puberty and endocrine functions has just begun to be studied. This review discusses some of the recent approaches developed to predict MKRN3 functions and its involvement in pubertal development.
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Fanis P, Morrou M, Tomazou M, Michailidou K, Spyrou GM, Toumba M, Skordis N, Neocleous V, Phylactou LA. Methylation status of hypothalamic Mkrn3 promoter across puberty. Front Endocrinol (Lausanne) 2022; 13:1075341. [PMID: 36714607 PMCID: PMC9880154 DOI: 10.3389/fendo.2022.1075341] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/20/2022] [Accepted: 12/20/2022] [Indexed: 01/15/2023] Open
Abstract
Makorin RING finger protein 3 (MKRN3) is an important factor located on chromosome 15 in the imprinting region associated with Prader-Willi syndrome. Imprinted MKRN3 is expressed in hypothalamic regions essential for the onset of puberty and mutations in the gene have been found in patients with central precocious puberty. The pubertal process is largely controlled by epigenetic mechanisms that include, among other things, DNA methylation at CpG dinucleotides of puberty-related genes. In the present study, we investigated the methylation status of the Mkrn3 promoter in the hypothalamus of the female mouse before, during and after puberty. Initially, we mapped the 32 CpG dinucleotides in the promoter, the 5'UTR and the first 50 nucleotides of the coding region of the Mkrn3 gene. Moreover, we identified a short CpG island region (CpG islet) located within the promoter. Methylation analysis using bisulfite sequencing revealed that CpG dinucleotides were methylated regardless of developmental stage, with the lowest levels of methylation being found within the CpG islet region. In addition, the CpG islet region showed significantly lower methylation levels at the pre-pubertal stage when compared with the pubertal or post-pubertal stage. Finally, in silico analysis of transcription factor binding sites on the Mkrn3 CpG islet identified the recruitment of 29 transcriptional regulators of which 14 were transcriptional repressors. Our findings demonstrate the characterization and differential methylation of the CpG dinucleotides located in the Mkrn3 promoter that could influence the transcriptional activity in pre-pubertal compared to pubertal or post-pubertal period. Further studies are needed to clarify the possible mechanisms and effects of differential methylation of the Mkrn3 promoter.
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Affiliation(s)
- Pavlos Fanis
- Department of Molecular Genetics, Function and Therapy, The Cyprus Institute of Neurology and Genetics, Nicosia, Cyprus
| | - Maria Morrou
- Department of Molecular Genetics, Function and Therapy, The Cyprus Institute of Neurology and Genetics, Nicosia, Cyprus
| | - Marios Tomazou
- Department of Bioinformatics, The Cyprus Institute of Neurology and Genetics, Nicosia, Cyprus
| | - Kyriaki Michailidou
- Biostatistics Unit, The Cyprus Institute of Neurology and Genetics, Nicosia, Cyprus
| | - George M. Spyrou
- Department of Bioinformatics, The Cyprus Institute of Neurology and Genetics, Nicosia, Cyprus
| | - Meropi Toumba
- Department of Molecular Genetics, Function and Therapy, The Cyprus Institute of Neurology and Genetics, Nicosia, Cyprus
- Child Endocrine Care, Department of Pediatrics, Aretaeio Hospital, Nicosia, Cyprus
| | - Nicos Skordis
- Department of Molecular Genetics, Function and Therapy, The Cyprus Institute of Neurology and Genetics, Nicosia, Cyprus
- Division of Pediatric Endocrinology, Paedi Center for Specialized Pediatrics, Nicosia, Cyprus
- Medical School, University of Nicosia, Nicosia, Cyprus
| | - Vassos Neocleous
- Department of Molecular Genetics, Function and Therapy, The Cyprus Institute of Neurology and Genetics, Nicosia, Cyprus
| | - Leonidas A. Phylactou
- Department of Molecular Genetics, Function and Therapy, The Cyprus Institute of Neurology and Genetics, Nicosia, Cyprus
- *Correspondence: Leonidas A. Phylactou,
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Tajima T. Genetic causes of central precocious puberty. Clin Pediatr Endocrinol 2022; 31:101-109. [PMID: 35928377 PMCID: PMC9297165 DOI: 10.1297/cpe.2022-0021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/14/2022] [Accepted: 05/07/2022] [Indexed: 11/12/2022] Open
Abstract
Central precocious puberty (CPP) is a condition in which the
hypothalamus–pituitary–gonadal system is activated earlier than the normal developmental
stage. The etiology includes organic lesions in the brain; however, in the case of
idiopathic diseases, environmental and/or genetic factors are involved in the development
of CPP. A genetic abnormality in KISS1R, that encodes the kisspeptin
receptor, was first reported in 2008 as a cause of idiopathic CPP. Furthermore, genetic
alterations in KISS1, MKRN3, DLK1, and
PROKR2 have been reported in idiopathic and/or familial CPP. Of these,
MKRN3 has the highest frequency of pathological variants associated
with CPP worldwide; but, abnormalities in MKRN3 are rare in patients in
East Asia, including Japan. MKRN3 and DLK1 are maternal
imprinting genes; thus, CPP develops when a pathological variant is inherited from the
father. The mechanism of CPP due to defects in MKRN3 and
DLK1 has not been completely clarified, but it is suggested that both
may negatively control the progression of puberty. CPP due to such a single gene
abnormality is extremely rare, but it is important to understand the mechanisms of puberty
and reproduction. A further development in the genetics of CPP is expected in the
future.
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Affiliation(s)
- Toshihiro Tajima
- Department of Pediatrics, Jichi Medical University Tochigi Children’ Medical Center, Tochigi, Japan
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Faienza MF, Urbano F, Moscogiuri LA, Chiarito M, De Santis S, Giordano P. Genetic, epigenetic and enviromental influencing factors on the regulation of precocious and delayed puberty. Front Endocrinol (Lausanne) 2022; 13:1019468. [PMID: 36619551 PMCID: PMC9813382 DOI: 10.3389/fendo.2022.1019468] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/15/2022] [Accepted: 12/08/2022] [Indexed: 12/24/2022] Open
Abstract
The pubertal development onset is controlled by a network of genes that regulate the gonadotropin releasing hormone (GnRH) pulsatile release and the subsequent increase of the circulating levels of pituitary gonadotropins that activate the gonadal function. Although the transition from pre-pubertal condition to puberty occurs physiologically in a delimited age-range, the inception of pubertal development can be anticipated or delayed due to genetic and epigenetic changes or environmental conditions. Most of the genetic and epigenetic alterations concern genes which encode for kisspeptin, GnRH, LH, FSH and their receptor, which represent crucial factors of the hypothalamic-pituitary-gonadal (HPG) axis. Recent data indicate a central role of the epigenome in the regulation of genes in the hypothalamus and pituitary that could mediate the flexibility of pubertal timing. Identification of epigenetically regulated genes, such as Makorin ring finger 3 (MKRN3) and Delta-like 1 homologue (DLK1), respectively responsible for the repression and the activation of pubertal development, provides additional evidence of how epigenetic variations affect pubertal timing. This review aims to investigate genetic, epigenetic, and environmental factors responsible for the regulation of precocious and delayed puberty.
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Affiliation(s)
- Maria Felicia Faienza
- Department of Precision and Regenerative Medicine and Ionian Area, University of Bari “Aldo Moro”, Bari, Italy
- Giovanni XXIII Pediatric Hospital, Bari, Italy
- *Correspondence: Maria Felicia Faienza,
| | | | | | | | - Stefania De Santis
- Department of Pharmacy-Pharmaceutical Science, University of Bari “Aldo Moro”, Bari, Italy
| | - Paola Giordano
- Giovanni XXIII Pediatric Hospital, Bari, Italy
- Department of Interdisciplinary Medicine, University of Bari “Aldo Moro”, Bari, Italy
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Li X, Yang C, Luo N, Yang Y, Guo Y, Chen P, Cun B. Ubiquitination and degradation of MGMT by TRIM72 increases the sensitivity of uveal melanoma cells to Dacarbazine treatment. Cancer Biomark 2021; 34:275-284. [PMID: 34958003 DOI: 10.3233/cbm-210345] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Uveal melanoma (UM) is the most common primary intraocular malignancy in adults with high metastasis rates. The O6-methylguanine DNA methyl transferase (MGMT) is involved in chemoresistance of Dacarbazine (DTIC) treatment. Our previous study found that the combination of oncolytic adenovirus H101 and DTIC in the treatment of UM cells shows a synergistic antitumor effect mainly though down-regulation of MGMT. MGMT knockdown by shRNAs increases the sensitivity of uveal melanoma cells to DTIC treatment. The protein hemostasis of MGMT is important for the antitumor effect of DTIC. Tripartite motif-containing protein 72 (TRIM72) belongs to the tripartite motif (TRIM) proteins family and was identified as a novel E3 ligase for MGMT, which interacts with and mediates the ubiquitination of MGMT. TRIM72 knockdown increases the protein levels of MGMT, while reduces the ubiquitination of MGMT. Further study indicated that MGMT is highly expressed in UM cells, and the protein levels of MGMT and TRIM72 shows a negative correlation. UM cells that ectopically expressing TRIM72 shows increased sensitivity to DTIC treatment, which is consistent with the antitumor affect exhibited by H101. These results suggest that TRIM72 is a promising therapeutic target for UM treatment.
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Affiliation(s)
- Xun Li
- Department of Clinical Skills Center, Kunming Medical University, Kunming, Yunnan, China.,Department of Clinical Skills Center, Kunming Medical University, Kunming, Yunnan, China
| | - Cong Yang
- Cancer Center, Shanghai Tenth People's Hospital, School of Medicine, Tongji University, Shanghai, China.,Department of Clinical Skills Center, Kunming Medical University, Kunming, Yunnan, China
| | - Ning Luo
- Department of Clinical Skills Center, Kunming Medical University, Kunming, Yunnan, China
| | - Yunzhi Yang
- Department of Clinical Skills Center, Kunming Medical University, Kunming, Yunnan, China
| | - Yan Guo
- Department of Clinical Skills Center, Kunming Medical University, Kunming, Yunnan, China
| | - Ping Chen
- Department of Ophthalmology, Renji Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai, China
| | - Biyun Cun
- Department of Clinical Skills Center, Kunming Medical University, Kunming, Yunnan, China
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Zhao B, Yang Y, Cun B, Chen P. AMBRA1 attenuates the proliferation of uveal melanoma cells. Open Med (Wars) 2021; 17:1-14. [PMID: 34901460 PMCID: PMC8627920 DOI: 10.1515/med-2021-0386] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2021] [Revised: 10/08/2021] [Accepted: 10/13/2021] [Indexed: 12/20/2022] Open
Abstract
Uveal melanoma (UVM) is the most common primary intraocular malignancy in adults with high metastasis rates. D-type cyclins (CCNDs) are central regulators of the cell division cycle and are among the most frequently deregulated therapeutic targets in human cancer. Recently, the E3 ligase adaptor, autophagy and beclin 1 regulator 1 (AMBRA1), was reported to regulate the stability of CCNDs, including CCND1, but its role in UVM has not been demonstrated. AMBRA1 is lowly expressed in UVM cells, and the ablation of AMBRA1 promotes the proliferation of 92.1 and OMM1 cells, whereas ectopically expressing AMBRA1 attenuates the proliferation of UVM cells. Further studies found that AMBRA1 promotes the ubiquitination and degradation of CCND1, and AMBRA1 regulates the proliferation of UVM cells in a CCND1-dependent manner. Thus, this study suggests that AMBRA1 serves as an important tumor suppressor by limiting UVM cell growth.
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Affiliation(s)
- Binbin Zhao
- Department of Ophthalmology, Renji Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai, 200127, China
| | - Yun Yang
- Center for Excellence in Molecular Cell Science, Chinese Academy of Sciences, Shanghai, 200031, China
| | - Biyun Cun
- Department of Clinical Skills Center, Kunming Medical University, Kunming, 650500, Yunnan, China
| | - Ping Chen
- Department of Ophthalmology, Renji Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai, 200127, China
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Kang T, Ye J, Qin P, Li H, Yao Z, Liu Y, Ling Y, Zhang Y, Yu T, Cao H, Li Y, Wang J, Fang F. Knockdown of Ptprn-2 delays the onset of puberty in female rats. Theriogenology 2021; 176:137-148. [PMID: 34607132 DOI: 10.1016/j.theriogenology.2021.09.029] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2021] [Revised: 09/21/2021] [Accepted: 09/27/2021] [Indexed: 12/15/2022]
Abstract
In the present study, we evaluated how Ptprn-2 (encoding tyrosine phosphatase, receptor type, N2 polypeptide protein) affects the onset of puberty in female rats. We evaluated the expression of Ptprn-2 mRNA and protein in the hypothalamus-pituitary-ovary axis of female rats using real-time quantitative reverse transcription polymerase chain reaction (RT-qPCR) and immunofluorescence at infancy, prepuberty, puberty, peripuberty, and adulthood. We evaluated the effects of Ptprn-2 gene knockdown on different aspects of reproduction-related biology in female rats, including the expression levels of puberty-related genes in vivo and in vitro, the time to onset of puberty, the concentration of serum reproductive hormones, the morphology of ovaries, and the ultrastructure of pituitary gonadotropin cells. Our results demonstrated that PTPRN-2 was primarily distributed in the arcuate nucleus (ARC), periventricular nucleus (PeN), adenohypophysis, and the ovarian follicular theca, stroma, and granulosa cells of female rats at various stages. Ptprn-2 mRNA levels significantly varied between peripuberty and puberty (P < 0.05) in the hypothalamus and pituitary gland. In hypothalamic cells, Ptprn-2 knockdown decreased the expression of Ptprn-2 and Rfrp-3 mRNA (P < 0.05) and increased the levels of Gnrh and Kiss-1 mRNA (P < 0.05). Ptprn-2 knockdown in the hypothalamus resulted in delayed vaginal opening compared to the control group (n = 12, P < 0.01), and Ptprn-2, Gnrh, and Kiss-1 mRNA levels (P < 0.05) all decreased, while the expression of Igf-1 (P < 0.05) and Rfrp-3 mRNA (P < 0.01) increased. The concentrations of FSH and P4 in the serum of Ptprn-2 knockdown rats were lower than in control animals (P < 0.05). Large transverse perimeters and longitudinal perimeters (P < 0.05) were found in the ovaries of Ptprn-2 knockdown rats. There were fewer large secretory particles from gonadotropin cells in adenohypophysis tissue of the Ptprn-2 knockdown group compared to the control group. This indicates that Ptprn-2 knockdown can regulate levels of Gnrh, Kiss-1, and Rfrp-3 mRNA in the hypothalamus, regulate the concentration of serum FSH and P4, and alter the morphology of ovarian and gonadotropin cells, delaying the onset of puberty in female rats.
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Affiliation(s)
- Tiezhu Kang
- Anhui Provincial Laboratory of Animal Genetic Resources Protection and Breeding, College of Animal Science and Technology, Anhui Agricultural University, 130 Changjiang West Road, Hefei, Anhui, 230036, China; Anhui Provincial Key Laboratory for Local Livestock and Poultry Genetic Resource Conservation and Bio-Breeding, 130 Changjiang West Road, Hefei, Anhui, 230036, China; Department of Animal Veterinary Science, College of Animal Science and Technology, Anhui Agricultural University, 130 Changjiang West Road, Hefei, Anhui, 230036, China
| | - Jing Ye
- Anhui Provincial Laboratory of Animal Genetic Resources Protection and Breeding, College of Animal Science and Technology, Anhui Agricultural University, 130 Changjiang West Road, Hefei, Anhui, 230036, China; Anhui Provincial Key Laboratory for Local Livestock and Poultry Genetic Resource Conservation and Bio-Breeding, 130 Changjiang West Road, Hefei, Anhui, 230036, China; Department of Animal Veterinary Science, College of Animal Science and Technology, Anhui Agricultural University, 130 Changjiang West Road, Hefei, Anhui, 230036, China
| | - Ping Qin
- Anhui Provincial Laboratory of Animal Genetic Resources Protection and Breeding, College of Animal Science and Technology, Anhui Agricultural University, 130 Changjiang West Road, Hefei, Anhui, 230036, China; Anhui Provincial Key Laboratory for Local Livestock and Poultry Genetic Resource Conservation and Bio-Breeding, 130 Changjiang West Road, Hefei, Anhui, 230036, China; Department of Animal Veterinary Science, College of Animal Science and Technology, Anhui Agricultural University, 130 Changjiang West Road, Hefei, Anhui, 230036, China
| | - Hailing Li
- Anhui Provincial Laboratory of Animal Genetic Resources Protection and Breeding, College of Animal Science and Technology, Anhui Agricultural University, 130 Changjiang West Road, Hefei, Anhui, 230036, China; Anhui Provincial Key Laboratory for Local Livestock and Poultry Genetic Resource Conservation and Bio-Breeding, 130 Changjiang West Road, Hefei, Anhui, 230036, China; Department of Animal Veterinary Science, College of Animal Science and Technology, Anhui Agricultural University, 130 Changjiang West Road, Hefei, Anhui, 230036, China
| | - Zhiqiu Yao
- Anhui Provincial Laboratory of Animal Genetic Resources Protection and Breeding, College of Animal Science and Technology, Anhui Agricultural University, 130 Changjiang West Road, Hefei, Anhui, 230036, China; Anhui Provincial Key Laboratory for Local Livestock and Poultry Genetic Resource Conservation and Bio-Breeding, 130 Changjiang West Road, Hefei, Anhui, 230036, China; Department of Animal Veterinary Science, College of Animal Science and Technology, Anhui Agricultural University, 130 Changjiang West Road, Hefei, Anhui, 230036, China
| | - Ya Liu
- Anhui Provincial Laboratory of Animal Genetic Resources Protection and Breeding, College of Animal Science and Technology, Anhui Agricultural University, 130 Changjiang West Road, Hefei, Anhui, 230036, China; Department of Animal Veterinary Science, College of Animal Science and Technology, Anhui Agricultural University, 130 Changjiang West Road, Hefei, Anhui, 230036, China
| | - Yinghui Ling
- Anhui Provincial Laboratory of Animal Genetic Resources Protection and Breeding, College of Animal Science and Technology, Anhui Agricultural University, 130 Changjiang West Road, Hefei, Anhui, 230036, China; Anhui Provincial Key Laboratory for Local Livestock and Poultry Genetic Resource Conservation and Bio-Breeding, 130 Changjiang West Road, Hefei, Anhui, 230036, China; Department of Animal Veterinary Science, College of Animal Science and Technology, Anhui Agricultural University, 130 Changjiang West Road, Hefei, Anhui, 230036, China
| | - Yunhai Zhang
- Anhui Provincial Laboratory of Animal Genetic Resources Protection and Breeding, College of Animal Science and Technology, Anhui Agricultural University, 130 Changjiang West Road, Hefei, Anhui, 230036, China; Anhui Provincial Key Laboratory for Local Livestock and Poultry Genetic Resource Conservation and Bio-Breeding, 130 Changjiang West Road, Hefei, Anhui, 230036, China; Department of Animal Veterinary Science, College of Animal Science and Technology, Anhui Agricultural University, 130 Changjiang West Road, Hefei, Anhui, 230036, China
| | - Tong Yu
- Anhui Provincial Laboratory of Animal Genetic Resources Protection and Breeding, College of Animal Science and Technology, Anhui Agricultural University, 130 Changjiang West Road, Hefei, Anhui, 230036, China; Anhui Provincial Key Laboratory for Local Livestock and Poultry Genetic Resource Conservation and Bio-Breeding, 130 Changjiang West Road, Hefei, Anhui, 230036, China; Department of Animal Veterinary Science, College of Animal Science and Technology, Anhui Agricultural University, 130 Changjiang West Road, Hefei, Anhui, 230036, China
| | - Hongguo Cao
- Anhui Provincial Laboratory of Animal Genetic Resources Protection and Breeding, College of Animal Science and Technology, Anhui Agricultural University, 130 Changjiang West Road, Hefei, Anhui, 230036, China; Anhui Provincial Key Laboratory for Local Livestock and Poultry Genetic Resource Conservation and Bio-Breeding, 130 Changjiang West Road, Hefei, Anhui, 230036, China; Department of Animal Veterinary Science, College of Animal Science and Technology, Anhui Agricultural University, 130 Changjiang West Road, Hefei, Anhui, 230036, China
| | - Yunsheng Li
- Anhui Provincial Laboratory of Animal Genetic Resources Protection and Breeding, College of Animal Science and Technology, Anhui Agricultural University, 130 Changjiang West Road, Hefei, Anhui, 230036, China; Anhui Provincial Key Laboratory for Local Livestock and Poultry Genetic Resource Conservation and Bio-Breeding, 130 Changjiang West Road, Hefei, Anhui, 230036, China; Department of Animal Veterinary Science, College of Animal Science and Technology, Anhui Agricultural University, 130 Changjiang West Road, Hefei, Anhui, 230036, China
| | - Juhua Wang
- Anhui Provincial Laboratory of Animal Genetic Resources Protection and Breeding, College of Animal Science and Technology, Anhui Agricultural University, 130 Changjiang West Road, Hefei, Anhui, 230036, China; Department of Animal Veterinary Science, College of Animal Science and Technology, Anhui Agricultural University, 130 Changjiang West Road, Hefei, Anhui, 230036, China
| | - Fugui Fang
- Anhui Provincial Laboratory of Animal Genetic Resources Protection and Breeding, College of Animal Science and Technology, Anhui Agricultural University, 130 Changjiang West Road, Hefei, Anhui, 230036, China; Anhui Provincial Key Laboratory for Local Livestock and Poultry Genetic Resource Conservation and Bio-Breeding, 130 Changjiang West Road, Hefei, Anhui, 230036, China; Department of Animal Veterinary Science, College of Animal Science and Technology, Anhui Agricultural University, 130 Changjiang West Road, Hefei, Anhui, 230036, China.
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Li M, Chen Y, Liao B, Tang J, Zhong J, Lan D. The role of kisspeptin and MKRN3 in the diagnosis of central precocious puberty in girls. Endocr Connect 2021; 10:1147-1154. [PMID: 34414898 PMCID: PMC8494402 DOI: 10.1530/ec-21-0182] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/22/2021] [Accepted: 08/17/2021] [Indexed: 12/16/2022]
Abstract
OBJECTIVE To evaluate the characteristics and significance of serum kisspeptin and makorin ring finger protein 3 (MKRN3) levels for the diagnosis of central precocious puberty (CPP) in girls. METHOD Thirty four individuals with CPP, 17 individuals with premature thelarche (PT), and 28 age-matched prepubertal girls as normal control (NC) were recruited in this case-control study. Physical measurements included BMI and tests for breast, bone, and sexual characteristics. Biochemical measurements included serum LH, FSH, estradiol, insulin-like growth factor-1, MKRN3, and kisspeptin. Blood samples were taken from individuals with CPP and PT before the gonadotrophin-releasing hormone stimulation test and at 30, 60, 90, and 120 min after injection with triptorelin. RESULTS Serum kisspeptin levels were higher in the CPP group when compared to the NC group (P = 0.020), while serum MKRN3 levels were lower in the two groups (P = 0.028). There were no significant differences between the CPP and PT groups as well as the PT and NC groups (all, P > 0.05). The cut-off value of serum kisspeptin differentiating patients with CPP from those without CPP was 0.40 nmol/L, with 82.4% sensitivity and 57.1% specificity, while the cut-off value of serum MKRN3 was 0.33 pmol/L, with 79.4% sensitivity and 53.6% specificity. The area under the curves (AUCs) of both kisspeptin and MKRN3 for differentiating those girls with CPP from PT were less than 0.5. CONCLUSIONS Serum levels of kisspeptin and MKRN3 may play an auxiliary role in predicting CPP. However, the two measurements were not able to differentiate girls with CPP from PT and prepubertal control. This study emphasizes the need to search for markers to simplify the accurate diagnosis of CPP in girls.
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Affiliation(s)
- Mei Li
- Department of Pediatrics, The First Affiliated Hospital of Guangxi Medical University, Nanning, China
| | - Yanfei Chen
- Department of Pediatrics, The First Affiliated Hospital of Guangxi Medical University, Nanning, China
| | - Binrong Liao
- Department of Pediatrics, The First Affiliated Hospital of Guangxi Medical University, Nanning, China
| | - Jing Tang
- Department of Pediatrics, The First Affiliated Hospital of Guangxi Medical University, Nanning, China
| | - Jingzi Zhong
- Department of Pediatrics, The First Affiliated Hospital of Guangxi Medical University, Nanning, China
| | - Dan Lan
- Department of Pediatrics, The First Affiliated Hospital of Guangxi Medical University, Nanning, China
- Correspondence should be addressed to D Lan:
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Li S, Duan W, Lei Y, Wang Z, Fu C, He L, Shen Z, Li M, Chen Y, Huang Y. Effects of lipid emulsions on the formation of Escherichia coli-Candida albicans mixed-species biofilms on PVC. Sci Rep 2021; 11:16929. [PMID: 34413406 DOI: 10.1038/s41598-021-96385-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2021] [Accepted: 08/05/2021] [Indexed: 12/22/2022] Open
Abstract
Patients receiving lipid emulsions are at increased risk of contracting catheter-related bloodstream infections (CRBSIs) in the clinic. More than 15% of CRBSIs are polymicrobial. The objective of this study was to explore the effects of lipid emulsions on the formation of Escherichia coli (E. coli)–Candida albicans (C. albicans) mixed-species biofilms (BFs) on polyvinyl chloride (PVC) surfaces and the underlying mechanism. Mixed-species BFs were produced by coculturing E. coli and C. albicans with PVC in various concentrations of lipid emulsions. Crystal violet staining and XTT assays were performed to test the mixed-species BF biomass and the viability of microbes in the BFs. The microstructures of the BFs were observed by an approach that combined confocal laser scanning microscopy, fluorescence in situ hybridization, and scanning electron microscopy. The study found that lipid emulsions could promote the formation of E. coli–C. albicans mixed-species BFs, especially with 10% lipid emulsions. The mechanism by which lipid emulsions promote mixed-species BF formation may involve significant upregulation of the expression of the flhDC, iha, HTA1, and HWP1 genes, which are associated with bacterial motility, adhesion, and BF formation. The results derived from this study necessitate strict aseptic precautions when handling lipid emulsions and avoiding the use of high concentrations of lipid emulsions for as long as possible.
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Li K, Zheng X, Tang H, Zang YS, Zeng C, Liu X, Shen Y, Pang Y, Wang S, Xie F, Lu X, Luo Y, Li Z, Bi W, Jia X, Huang T, Wei R, Huang K, Chen Z, Zhu Q, He Y, Zhang M, Gu Z, Xiao Y, Zhang X, Fletcher JA, Wang Y. E3 ligase MKRN3 is a tumor suppressor regulating PABPC1 ubiquitination in non-small cell lung cancer. J Exp Med 2021; 218:e20210151. [PMID: 34143182 PMCID: PMC8217967 DOI: 10.1084/jem.20210151] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2021] [Revised: 04/23/2021] [Accepted: 05/25/2021] [Indexed: 12/18/2022] Open
Abstract
Central precocious puberty (CPP), largely caused by germline mutations in the MKRN3 gene, has been epidemiologically linked to cancers. MKRN3 is frequently mutated in non-small cell lung cancers (NSCLCs) with five cohorts. Genomic MKRN3 aberrations are significantly enriched in NSCLC samples harboring oncogenic KRAS mutations. Low MKRN3 expression levels correlate with poor patient survival. Reconstitution of MKRN3 in MKRN3-inactivated NSCLC cells directly abrogates in vitro and in vivo tumor growth and proliferation. MKRN3 knockout mice are susceptible to urethane-induced lung cancer, and lung cell-specific knockout of endogenous MKRN3 accelerates NSCLC tumorigenesis in vivo. A mass spectrometry-based proteomics screen identified PABPC1 as a major substrate for MKRN3. The tumor suppressor function of MKRN3 is dependent on its E3 ligase activity, and MKRN3 missense mutations identified in patients substantially compromise MKRN3-mediated PABPC1 ubiquitination. Furthermore, MKRN3 modulates cell proliferation through PABPC1 nonproteolytic ubiquitination and subsequently, PABPC1-mediated global protein synthesis. Our integrated approaches demonstrate that the CPP-associated gene MKRN3 is a tumor suppressor.
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Affiliation(s)
- Ke Li
- Chinese Academy of Sciences Key Laboratory of Tissue Microenvironment and Tumor, Shanghai Institute of Nutrition and Health–Changzheng Hospital Joint Center for Translational Medicine, Institutes for Translational Medicine, Shanghai Institute of Nutrition and Health, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China
| | - Xufen Zheng
- Chinese Academy of Sciences Key Laboratory of Tissue Microenvironment and Tumor, Shanghai Institute of Nutrition and Health–Changzheng Hospital Joint Center for Translational Medicine, Institutes for Translational Medicine, Shanghai Institute of Nutrition and Health, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China
| | - Hua Tang
- Department of Thoracic Surgery, Changzheng Hospital, Shanghai, China
| | - Yuan-Sheng Zang
- Department of Medical Oncology, Changzheng Hospital, Shanghai, China
| | - Chunling Zeng
- Chinese Academy of Sciences Key Laboratory of Tissue Microenvironment and Tumor, Shanghai Institute of Nutrition and Health–Changzheng Hospital Joint Center for Translational Medicine, Institutes for Translational Medicine, Shanghai Institute of Nutrition and Health, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China
| | - Xiaoxiao Liu
- Chinese Academy of Sciences Key Laboratory of Tissue Microenvironment and Tumor, Shanghai Institute of Nutrition and Health–Changzheng Hospital Joint Center for Translational Medicine, Institutes for Translational Medicine, Shanghai Institute of Nutrition and Health, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China
| | - Yanying Shen
- Department of Pathology, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Yuzhi Pang
- Chinese Academy of Sciences Key Laboratory of Tissue Microenvironment and Tumor, Shanghai Institute of Nutrition and Health–Changzheng Hospital Joint Center for Translational Medicine, Institutes for Translational Medicine, Shanghai Institute of Nutrition and Health, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China
| | - Simin Wang
- Chinese Academy of Sciences Key Laboratory of Tissue Microenvironment and Tumor, Shanghai Institute of Nutrition and Health–Changzheng Hospital Joint Center for Translational Medicine, Institutes for Translational Medicine, Shanghai Institute of Nutrition and Health, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China
| | - Feifei Xie
- Chinese Academy of Sciences Key Laboratory of Tissue Microenvironment and Tumor, Shanghai Institute of Nutrition and Health–Changzheng Hospital Joint Center for Translational Medicine, Institutes for Translational Medicine, Shanghai Institute of Nutrition and Health, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China
| | - Xiaojing Lu
- Chinese Academy of Sciences Key Laboratory of Tissue Microenvironment and Tumor, Shanghai Institute of Nutrition and Health–Changzheng Hospital Joint Center for Translational Medicine, Institutes for Translational Medicine, Shanghai Institute of Nutrition and Health, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China
| | - Yuxiang Luo
- Chinese Academy of Sciences Key Laboratory of Tissue Microenvironment and Tumor, Shanghai Institute of Nutrition and Health–Changzheng Hospital Joint Center for Translational Medicine, Institutes for Translational Medicine, Shanghai Institute of Nutrition and Health, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China
| | - Zhang Li
- Chinese Academy of Sciences Key Laboratory of Tissue Microenvironment and Tumor, Shanghai Institute of Nutrition and Health–Changzheng Hospital Joint Center for Translational Medicine, Institutes for Translational Medicine, Shanghai Institute of Nutrition and Health, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China
| | - Wenbo Bi
- Chinese Academy of Sciences Key Laboratory of Tissue Microenvironment and Tumor, Shanghai Institute of Nutrition and Health–Changzheng Hospital Joint Center for Translational Medicine, Institutes for Translational Medicine, Shanghai Institute of Nutrition and Health, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China
| | - Xiaona Jia
- Chinese Academy of Sciences Key Laboratory of Tissue Microenvironment and Tumor, Shanghai Institute of Nutrition and Health–Changzheng Hospital Joint Center for Translational Medicine, Institutes for Translational Medicine, Shanghai Institute of Nutrition and Health, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China
| | - Tao Huang
- Bioinformatics Core, Shanghai Institute of Nutrition and Health, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai, China
| | - Rongqiang Wei
- Department of Thoracic Surgery, Changzheng Hospital, Shanghai, China
| | - Kenan Huang
- Department of Thoracic Surgery, Changzheng Hospital, Shanghai, China
| | - Zihao Chen
- Department of Thoracic Surgery, Changzheng Hospital, Shanghai, China
| | - Qingchen Zhu
- Chinese Academy of Sciences Key Laboratory of Tissue Microenvironment and Tumor, Shanghai Institute of Nutrition and Health, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai, China
| | - Yi He
- Department of Urology, No. 1 Hospital of Jiaxing, Jiaxing, China
| | - Miaoying Zhang
- Department of Pediatric Endocrinology and Inherited Metabolic Diseases, Children's Hospital of Fudan University, Shanghai, China
| | - Zhizhan Gu
- Department of Cancer Immunology and Immune Modulation, Boehringer Ingelheim Pharmaceuticals, Inc., Ridgefield, CT
- Department of Anatomy and Structural Biology and Gruss Lipper Biophotonics Center, Albert Einstein College of Medicine, Bronx, NY
| | - Yichuan Xiao
- Chinese Academy of Sciences Key Laboratory of Tissue Microenvironment and Tumor, Shanghai Institute of Nutrition and Health, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai, China
| | - Xiaoyang Zhang
- Department of Oncological Sciences, Huntsman Cancer Institute, University of Utah, Salt Lake City, UT
| | - Jonathan A. Fletcher
- Department of Pathology, Brigham and Women’s Hospital and Harvard Medical School, Boston, MA
| | - Yuexiang Wang
- Chinese Academy of Sciences Key Laboratory of Tissue Microenvironment and Tumor, Shanghai Institute of Nutrition and Health–Changzheng Hospital Joint Center for Translational Medicine, Institutes for Translational Medicine, Shanghai Institute of Nutrition and Health, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China
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