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Hu C, Yang M, Feng X, Wang S, Ma Y, Ma Y. miR-10167-3p targets TCF7L1 to inhibit bovine adipocyte differentiation and promote bovine adipocyte proliferation. Genomics 2024; 116:110903. [PMID: 39069233 DOI: 10.1016/j.ygeno.2024.110903] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2024] [Revised: 07/09/2024] [Accepted: 07/24/2024] [Indexed: 07/30/2024]
Abstract
MicroRNAs (miRNAs) are widely involved in various lipogenic processes, including adipocyte proliferation and differentiation, lipid droplet formation, and adipocyte-specific gene activation. The present study aimed to investigate the gene expression profiles of bovine preadipocytes under high miR-10167-3p expression using the RNA-seq technique and to verify the functions of its downstream target genes on the proliferation and differentiation of bovine preadipocytes. First, RNA-seq identified 573 differentially expressed genes (DEGs), of which 243 were downregulated and 330 were upregulated. Then, Kyoto Encyclopedia of Genes and Genomes (KEGG) analysis revealed that 15.19% of the DEGs were enriched in pathways related to lipid metabolism. Meanwhile, dual-luciferase reporter gene assay verified the target-binding relationship between miR-10167-3p and TCF7L1. The function of TCF7L1 was assessed using several experiments in adipocytes with high TCF7L1 expression and RNA interference. The mRNA and protein expression of proliferation, differentiation, and apoptosis marker genes were detected using qPCR and western blot, respectively; lipid droplet synthesis was detected using oil red O, Nile red, and bodipy staining; adipocyte proliferation was detected by EdU; and apoptosis was detected using flow cytometry. The results revealed that TCF7L1 overexpression inhibited bovine preadipocyte differentiation and apoptosis and promoted their proliferation, with opposite results obtained with its RNA interference. These results may provide a reference for the subsequent investigation of the molecular mechanism of bovine fat deposition.
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Affiliation(s)
- Chunli Hu
- Key Laboratory of Ruminant Molecular Cell Breeding, Ningxia Hui Autonomous Region, College of Animal Science and Technology, Ningxia University, Yinchuan 750021, China
| | - Mengli Yang
- Key Laboratory of Ruminant Molecular Cell Breeding, Ningxia Hui Autonomous Region, College of Animal Science and Technology, Ningxia University, Yinchuan 750021, China
| | - Xue Feng
- Key Laboratory of Ruminant Molecular Cell Breeding, Ningxia Hui Autonomous Region, College of Animal Science and Technology, Ningxia University, Yinchuan 750021, China
| | - Shuzhe Wang
- Key Laboratory of Ruminant Molecular Cell Breeding, Ningxia Hui Autonomous Region, College of Animal Science and Technology, Ningxia University, Yinchuan 750021, China
| | - Yanfen Ma
- Key Laboratory of Ruminant Molecular Cell Breeding, Ningxia Hui Autonomous Region, College of Animal Science and Technology, Ningxia University, Yinchuan 750021, China.
| | - Yun Ma
- Key Laboratory of Ruminant Molecular Cell Breeding, Ningxia Hui Autonomous Region, College of Animal Science and Technology, Ningxia University, Yinchuan 750021, China.
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Dong Z, Hou X, Wang X, Shen Z, Pang H, Chen L, Yin Z, Ren F, Li W, Ge Y, Ning H, Hu D. Proteomic Analysis of the Mitochondrial Responses in P19 Embryonic Stem Cells Exposed to Florfenicol. TOXICS 2023; 11:992. [PMID: 38133393 PMCID: PMC10747307 DOI: 10.3390/toxics11120992] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2023] [Revised: 11/29/2023] [Accepted: 12/04/2023] [Indexed: 12/23/2023]
Abstract
Florfenicol (FLO) has been shown to elicit diverse toxic effects in plants, insects, and mammals. Previously, our investigations revealed that FLO induced abnormal cardiac development and early embryonic mortality in chicken embryos. However, the effect of FLO on mitochondrial responses in stem cells remains unclear. In this study, we show that FLO significantly diminishes proliferation viability and obstructs the directed differentiation of P19 stem cells (P19SCs) into cardiomyocytes. Proteomic analysis revealed 148 differentially expressed proteins in response to FLO. Functional analysis has pinpointed FLO interference with biological processes associated with oxidative phosphorylation within the mitochondria. In alignment with the results of proteomic analysis, we confirmed that FLO inhibits the expression of both nuclear DNA-encoded and mitochondrial DNA-encoded subunits of the electron transport chain. Subsequent experiments demonstrated that FLO disrupts mitochondrial dynamics and induces the mitochondrial unfolded protein response to maintain mitochondrial homeostasis. These findings collectively highlight the significance of mitochondrial dynamics and the mitochondrial unfolded protein response to mediate the decreased proliferation viability and directed differentiation potential in P19SCs treated with FLO. In conclusion, this study provides a comprehensive overview of mitochondrial responses to FLO-induced cytotoxicity and enhances our understandings of the molecular mechanisms underlying FLO-induced embryonic toxicity.
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Affiliation(s)
- Zhihua Dong
- College of Animal Science and Technology, Henan Institute of Science and Technology, Xinxiang 453003, China; (Z.D.); (X.H.); (X.W.); (Z.S.); (H.P.); (L.C.); (Z.Y.); (F.R.); (Y.G.)
| | - Xueke Hou
- College of Animal Science and Technology, Henan Institute of Science and Technology, Xinxiang 453003, China; (Z.D.); (X.H.); (X.W.); (Z.S.); (H.P.); (L.C.); (Z.Y.); (F.R.); (Y.G.)
| | - Xueying Wang
- College of Animal Science and Technology, Henan Institute of Science and Technology, Xinxiang 453003, China; (Z.D.); (X.H.); (X.W.); (Z.S.); (H.P.); (L.C.); (Z.Y.); (F.R.); (Y.G.)
| | - Zihui Shen
- College of Animal Science and Technology, Henan Institute of Science and Technology, Xinxiang 453003, China; (Z.D.); (X.H.); (X.W.); (Z.S.); (H.P.); (L.C.); (Z.Y.); (F.R.); (Y.G.)
| | - Huiqing Pang
- College of Animal Science and Technology, Henan Institute of Science and Technology, Xinxiang 453003, China; (Z.D.); (X.H.); (X.W.); (Z.S.); (H.P.); (L.C.); (Z.Y.); (F.R.); (Y.G.)
| | - Lingli Chen
- College of Animal Science and Technology, Henan Institute of Science and Technology, Xinxiang 453003, China; (Z.D.); (X.H.); (X.W.); (Z.S.); (H.P.); (L.C.); (Z.Y.); (F.R.); (Y.G.)
| | - Zhihong Yin
- College of Animal Science and Technology, Henan Institute of Science and Technology, Xinxiang 453003, China; (Z.D.); (X.H.); (X.W.); (Z.S.); (H.P.); (L.C.); (Z.Y.); (F.R.); (Y.G.)
| | - Fei Ren
- College of Animal Science and Technology, Henan Institute of Science and Technology, Xinxiang 453003, China; (Z.D.); (X.H.); (X.W.); (Z.S.); (H.P.); (L.C.); (Z.Y.); (F.R.); (Y.G.)
| | - Weiguo Li
- Postdoctoral Research Station in Biological Sciences, Henan Normal University, Xinxiang 453003, China;
| | - Yaming Ge
- College of Animal Science and Technology, Henan Institute of Science and Technology, Xinxiang 453003, China; (Z.D.); (X.H.); (X.W.); (Z.S.); (H.P.); (L.C.); (Z.Y.); (F.R.); (Y.G.)
| | - Hongmei Ning
- College of Animal Science and Technology, Henan Institute of Science and Technology, Xinxiang 453003, China; (Z.D.); (X.H.); (X.W.); (Z.S.); (H.P.); (L.C.); (Z.Y.); (F.R.); (Y.G.)
| | - Dongfang Hu
- College of Animal Science and Technology, Henan Institute of Science and Technology, Xinxiang 453003, China; (Z.D.); (X.H.); (X.W.); (Z.S.); (H.P.); (L.C.); (Z.Y.); (F.R.); (Y.G.)
- Postdoctoral Research Station in Biological Sciences, Henan Normal University, Xinxiang 453003, China;
- Postdoctoral Research and Development Base, Henan Institute of Science and Technology, Xinxiang 453003, China
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Šopin T, Liška F, Kučera T, Cmarko D, Vacík T. Lysine Demethylase KDM2A Promotes Proteasomal Degradation of TCF/LEF Transcription Factors in a Neddylation-Dependent Manner. Cells 2023; 12:2620. [PMID: 37998355 PMCID: PMC10670284 DOI: 10.3390/cells12222620] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2023] [Revised: 11/02/2023] [Accepted: 11/10/2023] [Indexed: 11/25/2023] Open
Abstract
Canonical Wnt signaling is essential for a plethora of biological processes ranging from early embryogenesis to aging. Malfunctions of this crucial signaling pathway are associated with various developmental defects and diseases, including cancer. Although TCF/LEF transcription factors (TCF/LEFs) are known to be essential for this pathway, the regulation of their intracellular levels is not completely understood. Here, we show that the lysine demethylase KDM2A promotes the proteasomal destabilization of TCF/LEFs independently of its demethylase domain. We found that the KDM2A-mediated destabilization of TCF/LEFs is dependent on the KDM2A zinc finger CXXC domain. Furthermore, we identified the C-terminal region of TCF7L2 and the CXXC domain of KDM2A as the domains responsible for the interaction between the two proteins. Our study is also the first to show that endogenous TCF/LEF proteins undergo KDM2A-mediated proteasomal degradation in a neddylation-dependent manner. Here, we reveal a completely new mechanism that affects canonical Wnt signaling by regulating the levels of TCF/LEF transcription factors through their KDM2A-promoted proteasomal degradation.
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Affiliation(s)
- Tijana Šopin
- Institute of Biology and Medical Genetics, First Faculty of Medicine, Charles University and General University Hospital in Prague, 128 01 Prague, Czech Republic; (F.L.); (T.Š.); (D.C.)
| | - František Liška
- Institute of Biology and Medical Genetics, First Faculty of Medicine, Charles University and General University Hospital in Prague, 128 01 Prague, Czech Republic; (F.L.); (T.Š.); (D.C.)
| | - Tomáš Kučera
- Institute of Histology and Embryology, First Faculty of Medicine, Charles University and General University Hospital in Prague, 128 01 Prague, Czech Republic;
| | - Dušan Cmarko
- Institute of Biology and Medical Genetics, First Faculty of Medicine, Charles University and General University Hospital in Prague, 128 01 Prague, Czech Republic; (F.L.); (T.Š.); (D.C.)
| | - Tomáš Vacík
- Institute of Biology and Medical Genetics, First Faculty of Medicine, Charles University and General University Hospital in Prague, 128 01 Prague, Czech Republic; (F.L.); (T.Š.); (D.C.)
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Li Y, Li C, Liu M, Liu S, Liu F, Wang L. The RNA-binding protein CSDE1 promotes hematopoietic stem and progenitor cell generation via translational control of Wnt signaling. Development 2023; 150:dev201890. [PMID: 37874038 PMCID: PMC10652045 DOI: 10.1242/dev.201890] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2023] [Accepted: 09/19/2023] [Indexed: 10/25/2023]
Abstract
In vertebrates, the earliest hematopoietic stem and progenitor cells (HSPCs) are derived from a subset of specialized endothelial cells, hemogenic endothelial cells, in the aorta-gonad-mesonephros region through endothelial-to-hematopoietic transition. HSPC generation is efficiently and accurately regulated by a variety of factors and signals; however, the precise control of these signals remains incompletely understood. Post-transcriptional regulation is crucial for gene expression, as the transcripts are usually bound by RNA-binding proteins (RBPs) to regulate RNA metabolism. Here, we report that the RBP protein Csde1-mediated translational control is essential for HSPC generation during zebrafish early development. Genetic mutants and morphants demonstrated that depletion of csde1 impaired HSPC production in zebrafish embryos. Mechanistically, Csde1 regulates HSPC generation through modulating Wnt/β-catenin signaling activity. We demonstrate that Csde1 binds to ctnnb1 mRNAs (encoding β-catenin, an effector of Wnt signaling) and regulates translation but not stability of ctnnb1 mRNA, which further enhances β-catenin protein level and Wnt signal transduction activities. Together, we identify Csde1 as an important post-transcriptional regulator and provide new insights into how Wnt/β-catenin signaling is precisely regulated at the post-transcriptional level.
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Affiliation(s)
- Ying Li
- State Key Laboratory of Experimental Hematology, National Clinical Research Center for Blood Diseases, Haihe Laboratory of Cell Ecosystem, Institute of Hematology and Blood Diseases Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin 300020, China
| | - Can Li
- State Key Laboratory of Experimental Hematology, National Clinical Research Center for Blood Diseases, Haihe Laboratory of Cell Ecosystem, Institute of Hematology and Blood Diseases Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin 300020, China
| | - Mengyao Liu
- State Key Laboratory of Experimental Hematology, National Clinical Research Center for Blood Diseases, Haihe Laboratory of Cell Ecosystem, Institute of Hematology and Blood Diseases Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin 300020, China
| | - Shicheng Liu
- State Key Laboratory of Membrane Biology, Institute of Zoology, Institute for Stem Cell and Regeneration, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Beijing 100101, China
| | - Feng Liu
- State Key Laboratory of Membrane Biology, Institute of Zoology, Institute for Stem Cell and Regeneration, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Beijing 100101, China
| | - Lu Wang
- State Key Laboratory of Experimental Hematology, National Clinical Research Center for Blood Diseases, Haihe Laboratory of Cell Ecosystem, Institute of Hematology and Blood Diseases Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin 300020, China
- Tianjin Institutes of Health Science, Tianjin 301600, China
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Yue Y, Tang Y, Huang H, Zheng D, Liu C, Zhang H, Liu Y, Li Y, Sun X, Lu L. VBP1 negatively regulates CHIP and selectively inhibits the activity of hypoxia-inducible factor (HIF)-1α but not HIF-2α. J Biol Chem 2023:104829. [PMID: 37201586 DOI: 10.1016/j.jbc.2023.104829] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2023] [Revised: 05/07/2023] [Accepted: 05/09/2023] [Indexed: 05/20/2023] Open
Abstract
Hypoxia-inducible factor-1 (HIF-1) is a critical transcription factor that regulates expression of genes involved in cellular adaptation to low oxygen levels. Aberrant regulation of the HIF-1 signaling pathway is linked to various human diseases. Previous studies have established that HIF-1α is rapidly degraded in a von Hippel-Lindau protien (pVHL)-dependent manner under normoxic conditions. In this study, we find that pVHL binding protein 1 (VBP1) is a negative regulator of HIF-1α but not HIF-2α using zebrafish as an in vivo model and in vitro cell culture models. Deletion of vbp1 in zebrafish caused Hif-1α accumulation and upregulation of Hif target genes. Moreover, vbp1 was involved in induction of hematopoietic stem cells (HSCs) under hypoxic conditions. However, VBP1 interacted with and promoted the degradation of HIF-1α in a pVHL-independent manner. Mechanistically, we identify the ubiquitin ligase CHIP and HSP70 as new VBP1 binding partners, and demonstrate that VBP1 negatively regulated CHIP and facilitated CHIP-mediated degradation of HIF-1α. In patients with clear cell renal cell carcinoma (ccRCC), lower VBP1 expression was associated with worse survival outcomes. In conclusion, our results link VBP1 with CHIP stability and provide insights into underlying molecular mechanisms of HIF-1α-driven pathological processes.
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Affiliation(s)
- Yiming Yue
- Key Laboratory of Marine Drugs, The Ministry of Education of China, School of Medicine and Pharmacy, Ocean University of China, Qingdao, China; Laboratory for Marine Drugs and Biological Products, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China
| | - Yanfei Tang
- Key Laboratory of Marine Drugs, The Ministry of Education of China, School of Medicine and Pharmacy, Ocean University of China, Qingdao, China; Laboratory for Marine Drugs and Biological Products, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China
| | - Hao Huang
- Key Laboratory of Marine Drugs, The Ministry of Education of China, School of Medicine and Pharmacy, Ocean University of China, Qingdao, China; Laboratory for Marine Drugs and Biological Products, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China
| | - Dongdong Zheng
- Key Laboratory of Marine Drugs, The Ministry of Education of China, School of Medicine and Pharmacy, Ocean University of China, Qingdao, China; Laboratory for Marine Drugs and Biological Products, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China
| | - Cong Liu
- Key Laboratory of Marine Drugs, The Ministry of Education of China, School of Medicine and Pharmacy, Ocean University of China, Qingdao, China; Laboratory for Marine Drugs and Biological Products, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China
| | - Haifeng Zhang
- Key Laboratory of Marine Drugs, The Ministry of Education of China, School of Medicine and Pharmacy, Ocean University of China, Qingdao, China; Laboratory for Marine Drugs and Biological Products, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China
| | - Yunzhang Liu
- Key Laboratory of Marine Drugs, The Ministry of Education of China, School of Medicine and Pharmacy, Ocean University of China, Qingdao, China; Laboratory for Marine Drugs and Biological Products, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China
| | - Yun Li
- Key Laboratory of Marine Drugs, The Ministry of Education of China, School of Medicine and Pharmacy, Ocean University of China, Qingdao, China; Laboratory for Marine Drugs and Biological Products, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China
| | - Xiangrong Sun
- Department of Physiology and Pathophysiology, School of Basic Medicine, Qingdao University, Qingdao, China
| | - Ling Lu
- Key Laboratory of Marine Drugs, The Ministry of Education of China, School of Medicine and Pharmacy, Ocean University of China, Qingdao, China; Laboratory for Marine Drugs and Biological Products, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China.
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Wang B, Zhao Q, Gong X, Wang C, Bai Y, Wang H, Zhou J, Rong X. Transmembrane anterior posterior transformation 1 regulates BMP signaling and modulates the protein stability of SMAD1/5. J Biol Chem 2022; 298:102684. [PMID: 36370851 PMCID: PMC9763856 DOI: 10.1016/j.jbc.2022.102684] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2022] [Revised: 10/26/2022] [Accepted: 11/01/2022] [Indexed: 11/11/2022] Open
Abstract
The bone morphogenetic protein (BMP) signaling pathway plays pivotal roles in various biological processes during embryogenesis and adult homeostasis. Transmembrane anterior posterior transformation 1 (TAPT1) is an evolutionarily conserved protein involved in murine axial skeletal patterning. Genetic defects in TAPT1 result in complex lethal osteochondrodysplasia. However, the specific cellular activity of TAPT1 is not clear. Herein, we report that TAPT1 inhibits BMP signaling and destabilizes the SMAD1/5 protein by facilitating its interaction with SMURF1 E3 ubiquitin ligase, which leads to SMAD1/5 proteasomal degradation. In addition, we found that the activation of BMP signaling facilitates the redistribution of TAPT1 and promotes its association with SMAD1. TAPT1-deficient murine C2C12 myoblasts or C3H/10T1/2 mesenchymal stem cells exhibit elevated SMAD1/5/9 protein levels, which amplifies BMP activation, in turn leading to a boost in the transdifferentiation or differentiation processing of these distinct TAPT1-deficient cell lines changing into mature osteoblasts. Furthermore, the enhancing effect of TAPT1 deficiency on osteogenic differentiation of C3H/10T1/2 cells was observed in an in vivo ectopic bone formation model. Importantly, a subset of TAPT1 mutations identified in humans with lethal skeletal dysplasia exhibited gain-of-function activity on SMAD1 protein levels. Thus, this finding elucidates the role of TAPT1 in the regulation of SMAD1/5 protein stability for controlling BMP signaling.
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Affiliation(s)
- Bo Wang
- Key Laboratory of Marine Drugs (Ocean University of China), Chinese Ministry of Education, and School of Medicine and Pharmacy, Ocean University of China, Qingdao, China; Laboratory for Marine Drugs and Bioproducts, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao, China
| | - Qian Zhao
- Key Laboratory of Marine Drugs (Ocean University of China), Chinese Ministry of Education, and School of Medicine and Pharmacy, Ocean University of China, Qingdao, China; Laboratory for Marine Drugs and Bioproducts, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao, China
| | - Xiaoxia Gong
- Key Laboratory of Marine Drugs (Ocean University of China), Chinese Ministry of Education, and School of Medicine and Pharmacy, Ocean University of China, Qingdao, China; Laboratory for Marine Drugs and Bioproducts, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao, China
| | - Caixia Wang
- Key Laboratory of Marine Drugs (Ocean University of China), Chinese Ministry of Education, and School of Medicine and Pharmacy, Ocean University of China, Qingdao, China; Laboratory for Marine Drugs and Bioproducts, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao, China
| | - Yan Bai
- Key Laboratory of Marine Drugs (Ocean University of China), Chinese Ministry of Education, and School of Medicine and Pharmacy, Ocean University of China, Qingdao, China; Laboratory for Marine Drugs and Bioproducts, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao, China
| | - Hongying Wang
- Hubei Provincial Key Laboratory for Protection and Application of Special Plants in Wuling Area of China, Key Laboratory of State Ethnic Affairs Commission for Biological Technology, College of Life Sciences, South-Central Minzu University, Wuhan, China
| | - Jianfeng Zhou
- Key Laboratory of Marine Drugs (Ocean University of China), Chinese Ministry of Education, and School of Medicine and Pharmacy, Ocean University of China, Qingdao, China; Laboratory for Marine Drugs and Bioproducts, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao, China.
| | - Xiaozhi Rong
- Key Laboratory of Marine Drugs (Ocean University of China), Chinese Ministry of Education, and School of Medicine and Pharmacy, Ocean University of China, Qingdao, China; Laboratory for Marine Drugs and Bioproducts, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao, China.
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Norrie disease protein is essential for cochlear hair cell maturation. Proc Natl Acad Sci U S A 2021; 118:2106369118. [PMID: 34544869 DOI: 10.1073/pnas.2106369118] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/13/2021] [Indexed: 11/18/2022] Open
Abstract
Mutations in the gene for Norrie disease protein (Ndp) cause syndromic deafness and blindness. We show here that cochlear function in an Ndp knockout mouse deteriorated with age: At P3-P4, hair cells (HCs) showed progressive loss of Pou4f3 and Gfi1, key transcription factors for HC maturation, and Myo7a, a specialized myosin required for normal function of HC stereocilia. Loss of expression of these genes correlated to increasing HC loss and profound hearing loss by 2 mo. We show that overexpression of the Ndp gene in neonatal supporting cells or, remarkably, up-regulation of canonical Wnt signaling in HCs rescued HCs and cochlear function. We conclude that Ndp secreted from supporting cells orchestrates a transcriptional network for the maintenance and survival of HCs and that increasing the level of β-catenin, the intracellular effector of Wnt signaling, is sufficient to replace the functional requirement for Ndp in the cochlea.
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Regulatory variants in TCF7L2 are associated with thoracic aortic aneurysm. Am J Hum Genet 2021; 108:1578-1589. [PMID: 34265237 DOI: 10.1016/j.ajhg.2021.06.016] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2021] [Accepted: 06/18/2021] [Indexed: 02/08/2023] Open
Abstract
Thoracic aortic aneurysm (TAA) is characterized by dilation of the aortic root or ascending/descending aorta. TAA is a heritable disease that can be potentially life threatening. While 10%-20% of TAA cases are caused by rare, pathogenic variants in single genes, the origin of the majority of TAA cases remains unknown. A previous study implicated common variants in FBN1 with TAA disease risk. Here, we report a genome-wide scan of 1,351 TAA-affected individuals and 18,295 control individuals from the Cardiovascular Health Improvement Project and Michigan Genomics Initiative at the University of Michigan. We identified a genome-wide significant association with TAA for variants within the third intron of TCF7L2 following replication with meta-analysis of four additional independent cohorts. Common variants in this locus are the strongest known genetic risk factor for type 2 diabetes. Although evidence indicates the presence of different causal variants for TAA and type 2 diabetes at this locus, we observed an opposite direction of effect. The genetic association for TAA colocalizes with an aortic eQTL of TCF7L2, suggesting a functional relationship. These analyses predict an association of higher expression of TCF7L2 with TAA disease risk. In vitro, we show that upregulation of TCF7L2 is associated with BCL2 repression promoting vascular smooth muscle cell apoptosis, a key driver of TAA disease.
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9
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Lin LL, Yang F, Zhang DH, Hu C, Yang S, Chen XQ. ARHGAP10 inhibits the epithelial-mesenchymal transition of non-small cell lung cancer by inactivating PI3K/Akt/GSK3β signaling pathway. Cancer Cell Int 2021; 21:320. [PMID: 34174897 PMCID: PMC8236192 DOI: 10.1186/s12935-021-02022-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2021] [Accepted: 06/14/2021] [Indexed: 01/13/2023] Open
Abstract
Background Rho GTPase activating protein 10 (ARHGAP10) has been implicated as an essential element in multiple cellular process, including cell migration, adhesion and actin cytoskeleton dynamic reorganization. However, the correlation of ARHGAP10 expression with epithelial–mesenchymal transition (EMT) in lung cancer cells is unclear and remains to be elucidated. Herein, we investigated the relationship between the trait of ARHGAP10 and non-small cell lung cancer (NSCLC) pathological process. Methods Immunohistochemistry was conducted to evaluate the expression of ARHGAP10 in NSCLC tissues. CCK-8 assays, Transwell assays, scratch assays were applied to assess cell proliferation, invasion and migration. The expression levels of EMT biomarkers and active molecules involved in PI3K/Akt/GSK3β signaling pathway were examined through immunofluorescence and Western blot. Results ARHGAP10 was detected to be lower expression in NSCLC tissues compared with normal tissues from individuals. Moreover, overexpression of ARHGAP10 inhibited migratory and invasive potentials of A549 and NCI-H1299 cells. In addition, ARHGAP10 directly mediated the process of EMT via PI3K/Akt/GSK3β pathway. Meanwhile, activation of the signaling pathway of insulin-like growth factors-1 (IGF-1) reversed ARHGAP10 overexpression regulated EMT in NSCLC cells. Conclusion ARHGAP10 inhibits the epithelial–mesenchymal transition in NSCLC via PI3K/Akt/GSK3β signaling pathway, suggesting agonist of ARHGAP10 may be an optional remedy for NSCLC patients than traditional opioids.
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Affiliation(s)
- Lan-Lan Lin
- Department of Respiratory Medicine, Fujian Medical University Union Hospital, Fuzhou, 350001, Fujian, People's Republic of China
| | - Fan Yang
- Department of Respiratory Medicine, Fujian Medical University Union Hospital, Fuzhou, 350001, Fujian, People's Republic of China
| | - Dong-Huan Zhang
- Department of Oncology, Fujian Medical University Union Hospital, Fuzhou, 350001, Fujian, People's Republic of China
| | - Cong Hu
- Department of Respiratory Medicine, Fujian Medical University Union Hospital, Fuzhou, 350001, Fujian, People's Republic of China
| | - Sheng Yang
- Department of Oncology, Fujian Medical University Union Hospital, Fuzhou, 350001, Fujian, People's Republic of China.
| | - Xiang-Qi Chen
- Department of Respiratory Medicine, Fujian Medical University Union Hospital, Fuzhou, 350001, Fujian, People's Republic of China.
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