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Yang X, Ma L, Zhang J, Chen L, Zou Z, Shen D, He H, Zhang L, Chen J, Yuan Z, Qin X, Yu C. Hypofucosylation of Unc5b regulated by Fut8 enhances macrophage emigration and prevents atherosclerosis. Cell Biosci 2023; 13:13. [PMID: 36670464 PMCID: PMC9854080 DOI: 10.1186/s13578-023-00959-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2022] [Accepted: 01/08/2023] [Indexed: 01/21/2023] Open
Abstract
BACKGROUND Atherosclerosis (AS) is the leading underlying cause of the majority of clinical cardiovascular events. Retention of foamy macrophages in plaques is the main factor initiating and promoting the atherosclerotic process. Our previous work showed that ox-LDL induced macrophage retention in plaques and that the guidance receptor Uncoordinated-5 homolog B (Unc5b) was involved in this process. However, little is known about the role of Unc5b in regulating macrophage accumulation within plaques. RESULTS In the present study, we found that Unc5b controls macrophage migration and thus promotes plaque progression in ApoE-/- mice. The immunofluorescence colocalization assay results first suggested that fucosyltransferase 8 (Fut8) might participate in the exacerbation of atherosclerosis. Animals with Unc5b overexpression showed elevated levels of Fut8 and numbers of macrophages and an increased lesion size and intimal thickness. However, these effects were reversed in ApoE-/- mice with Unc5b knockdown. Furthermore, Raw264.7 macrophages with siRNA-mediated silencing of Unc5b or overexpression of Unc5b were used to confirm the regulatory mechanisms of Unc5b and Fut8 in vitro. In response to ox-LDL exposure, Unc5b and Fut8 were both upregulated, and macrophages showed reduced pseudopod formation and migratory capacities. However, these capacities were restored by blocking Unc5b or Fut8. Furthermore, the IP assay indicated that Fut8 regulated the level of α-1,6 fucosylation of Unc5b, which mainly occurs in the endoplasmic reticulum (ER), and genetic deletion of the main fucosylation sites or Fut8 resulted in hypofucosylation of Unc5b. Moreover, the macrophage migration mediated by Unc5b depended on inactivation of the p-CDC42/p-PAK pathway. Conversely, macrophages with Unc5b overexpression displayed activation of the p-CDC42/p-PAK pathway and decreased migration both in vivo and in vitro. CONCLUSION These results demonstrated that hypofucosylation of Unc5b regulated by Fut8 is positively associated with the delay of the atherosclerotic process by promoting the migration of foamy macrophages. These findings identify a promising therapeutic target for atherosclerosis.
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Affiliation(s)
- Xi Yang
- grid.203458.80000 0000 8653 0555Institute of Life Sciences, Chongqing Medical University, Chongqing, 400016 China ,grid.410612.00000 0004 0604 6392College of Basic Medicine, Inner Mongolia Medical University, Hohhot, 010110 China
| | - Limei Ma
- grid.203458.80000 0000 8653 0555College of Pharmacy, Chongqing Medical University, Chongqing, 400016 China
| | - Jun Zhang
- grid.203458.80000 0000 8653 0555Institute of Life Sciences, Chongqing Medical University, Chongqing, 400016 China
| | - Linmu Chen
- grid.203458.80000 0000 8653 0555Institute of Life Sciences, Chongqing Medical University, Chongqing, 400016 China
| | - Zhen Zou
- grid.203458.80000 0000 8653 0555Institute of Life Sciences, Chongqing Medical University, Chongqing, 400016 China
| | - Di Shen
- grid.203458.80000 0000 8653 0555Institute of Life Sciences, Chongqing Medical University, Chongqing, 400016 China
| | - Hui He
- grid.203458.80000 0000 8653 0555Institute of Life Sciences, Chongqing Medical University, Chongqing, 400016 China
| | - Lei Zhang
- grid.203458.80000 0000 8653 0555College of Pharmacy, Chongqing Medical University, Chongqing, 400016 China
| | - Jun Chen
- grid.203458.80000 0000 8653 0555College of Pharmacy, Chongqing Medical University, Chongqing, 400016 China
| | - Zhiyi Yuan
- grid.203458.80000 0000 8653 0555College of Pharmacy, Chongqing Medical University, Chongqing, 400016 China
| | - Xia Qin
- grid.203458.80000 0000 8653 0555College of Pharmacy, Chongqing Medical University, Chongqing, 400016 China
| | - Chao Yu
- grid.203458.80000 0000 8653 0555College of Pharmacy, Chongqing Medical University, Chongqing, 400016 China
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Patel T, Carnwath TP, Wang X, Allen M, Lincoln SJ, Lewis‐Tuffin L, Quicksall ZS, Lin S, Tutor‐New FQ, Ho CC, Min Y, Malphrus KG, Nguyen TT, Martin E, Garcia CA, Alkharboosh RM, Grewal S, Chaichana K, Wharen R, Guerrero‐Cazares H, Quinones‐Hinojosa A, Ertekin‐Taner N. Transcriptional landscape of human microglia implicates age, sex, and APOE-related immunometabolic pathway perturbations. Aging Cell 2022; 21:e13606. [PMID: 35388616 PMCID: PMC9124307 DOI: 10.1111/acel.13606] [Citation(s) in RCA: 21] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2022] [Revised: 03/19/2022] [Accepted: 03/21/2022] [Indexed: 12/20/2022] Open
Abstract
Microglia have fundamental roles in health and disease; however, effects of age, sex, and genetic factors on human microglia have not been fully explored. We applied bulk and single-cell approaches to comprehensively characterize human microglia transcriptomes and their associations with age, sex, and APOE. We identified a novel microglial signature, characterized its expression in bulk tissue and single-cell microglia transcriptomes. We discovered microglial co-expression network modules associated with age, sex, and APOE-ε4 that are enriched for lipid and carbohydrate metabolism genes. Integrated analyses of modules with single-cell transcriptomes revealed significant overlap between age-associated module genes and both pro-inflammatory and disease-associated microglial clusters. These modules and clusters harbor known neurodegenerative disease genes including APOE, PLCG2, and BIN1. Meta-analyses with published bulk and single-cell microglial datasets further supported our findings. Thus, these data represent a well-characterized human microglial transcriptome resource and highlight age, sex, and APOE-related microglial immunometabolism perturbations with potential relevance in neurodegeneration.
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Affiliation(s)
- Tulsi Patel
- Department of NeuroscienceMayo ClinicJacksonvilleFloridaUSA
| | | | - Xue Wang
- Department of Quantitative Health SciencesMayo ClinicJacksonvilleFloridaUSA
| | - Mariet Allen
- Department of NeuroscienceMayo ClinicJacksonvilleFloridaUSA
| | | | | | | | - Shu Lin
- Department of NeuroscienceMayo ClinicJacksonvilleFloridaUSA
| | | | | | - Yuhao Min
- Department of NeuroscienceMayo ClinicJacksonvilleFloridaUSA
| | | | - Thuy T. Nguyen
- Department of NeuroscienceMayo ClinicJacksonvilleFloridaUSA
| | | | | | - Rawan M. Alkharboosh
- Department of NeurosurgeryMayo ClinicJacksonvilleFloridaUSA
- Neuroscience Graduate ProgramMayo Clinic Graduate School of Biomedical SciencesMayo ClinicRochesterMinnesotaUSA
- Regenerative Sciences Training ProgramCenter for Regenerative MedicineMayo ClinicRochesterMinnesotaUSA
| | - Sanjeet Grewal
- Department of NeurosurgeryMayo ClinicJacksonvilleFloridaUSA
| | | | - Robert Wharen
- Department of NeurosurgeryMayo ClinicJacksonvilleFloridaUSA
| | | | | | - Nilüfer Ertekin‐Taner
- Department of NeuroscienceMayo ClinicJacksonvilleFloridaUSA
- Department of NeurologyMayo ClinicJacksonvilleFloridaUSA
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Sun S, Zane A, Fulton C, Philipoom J. Statistical and bioinformatic analysis of hemimethylation patterns in non-small cell lung cancer. BMC Cancer 2021; 21:268. [PMID: 33711952 PMCID: PMC7953768 DOI: 10.1186/s12885-021-07990-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2020] [Accepted: 03/01/2021] [Indexed: 12/22/2022] Open
Abstract
Background DNA methylation is an epigenetic event involving the addition of a methyl-group to a cytosine-guanine base pair (i.e., CpG site). It is associated with different cancers. Our research focuses on studying non-small cell lung cancer hemimethylation, which refers to methylation occurring on only one of the two DNA strands. Many studies often assume that methylation occurs on both DNA strands at a CpG site. However, recent publications show the existence of hemimethylation and its significant impact. Therefore, it is important to identify cancer hemimethylation patterns. Methods In this paper, we use the Wilcoxon signed rank test to identify hemimethylated CpG sites based on publicly available non-small cell lung cancer methylation sequencing data. We then identify two types of hemimethylated CpG clusters, regular and polarity clusters, and genes with large numbers of hemimethylated sites. Highly hemimethylated genes are then studied for their biological interactions using available bioinformatics tools. Results In this paper, we have conducted the first-ever investigation of hemimethylation in lung cancer. Our results show that hemimethylation does exist in lung cells either as singletons or clusters. Most clusters contain only two or three CpG sites. Polarity clusters are much shorter than regular clusters and appear less frequently. The majority of clusters found in tumor samples have no overlap with clusters found in normal samples, and vice versa. Several genes that are known to be associated with cancer are hemimethylated differently between the cancerous and normal samples. Furthermore, highly hemimethylated genes exhibit many different interactions with other genes that may be associated with cancer. Hemimethylation has diverse patterns and frequencies that are comparable between normal and tumorous cells. Therefore, hemimethylation may be related to both normal and tumor cell development. Conclusions Our research has identified CpG clusters and genes that are hemimethylated in normal and lung tumor samples. Due to the potential impact of hemimethylation on gene expression and cell function, these clusters and genes may be important to advance our understanding of the development and progression of non-small cell lung cancer. Supplementary Information The online version contains supplementary material available at 10.1186/s12885-021-07990-7.
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Affiliation(s)
- Shuying Sun
- Department of Mathematics, Texas State University, San Marcos, TX, USA.
| | - Austin Zane
- Department of Statistics, Texas A&M University, College Station, TX, USA
| | - Carolyn Fulton
- Department of Mathematics, Schreiner University, Kerrville, TX, USA
| | - Jasmine Philipoom
- Department of Mathematics, Applied Mathematics, and Statistics, Case Western Reserve University, Cleveland, OH, USA
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Mei S, Zong H, Zhou H. Long non-coding RNA PITPNA-AS1 regulates UNC5B expression in papillary thyroid cancer via sponging miR-129-5p. Int J Biol Markers 2021; 36:10-19. [PMID: 33706585 DOI: 10.1177/1724600820985528] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
BACKGROUND Long non-coding RNA (lncRNA) PITPNA antisense RNA 1 (PITPNA-AS1) expression characteristics, function, and mechanism in papillary thyroid cancer are unclear. METHODS Quantitative real-time polymerase chain reaction (qRT-PCR) was applied for detecting PITPNA-AS1, UNC-5 netrin receptor B (UNC5B) mRNA, and miR-129-5p expressions in papillary thyroid cancer tissues and cell lines. EdU assay, cell counting kit-8 (CCK-8) assay, wound healing assay, and flow cytometry analysis were performed to investigate the biological functions of PITPNA-AS1 in papillary thyroid cancer. Dual-luciferase reporter assay was utilized for determining whether PITPNA-AS1 and miR-129-5p, as well as UNC5B and miR-129-5p could directly bind to each other. Western blot assay was employed for measuring UNC5B protein expression level in papillary thyroid cancer cell lines. RESULTS PITPNA-AS1 and UNC5B expressions were markedly increased in papillary thyroid cancer tissues and cell lines while miR-129-5p expression was down-regulated. Knockdown of PITPNA-AS1 could significantly inhibit papillary thyroid cancer cell growth and migration and promote cell apoptosis while UNC5B overexpression plasmids or miR-129-5p inhibitors counteracted the knockdown effect of PITPNA-AS1 on papillary thyroid cancer cells. PITPNA-AS1 targeted miR-129-5p to repress its expression and miR-129-5p targeted UNC5B to repress its expression. Silencing PITPNA-AS1 reduced the expression of UNC5B via regulating miR-129-5p expression. CONCLUSIONS PITPNA-AS1 facilitated papillary thyroid cancer cell proliferation and migration, and suppressed apoptosis through miR-129-5p/UNC5B axis.
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Affiliation(s)
- Shijuan Mei
- Department of Breast and Thyroid Surgery, Qinghai University Affiliated Hospital, Xining, Qinghai, China
| | - Huafeng Zong
- Department of Pathology, Dalian Friendship Hospital, Zhongshan District, Dalian, Liaoning, China
| | - Haicheng Zhou
- Department of Endocrinology, the First Affiliated Hospital of Dalian Medical University, Xigang District, Liaoning, China
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Merryweather-Clarke AT, Cook D, Lara BJ, Hua P, Repapi E, Ashley N, Lim SY, Watt SM. Does osteogenic potential of clonal human bone marrow mesenchymal stem/stromal cells correlate with their vascular supportive ability? Stem Cell Res Ther 2018; 9:351. [PMID: 30567594 PMCID: PMC6300038 DOI: 10.1186/s13287-018-1095-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2018] [Revised: 11/28/2018] [Accepted: 11/30/2018] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Human bone marrow-derived mesenchymal stem/stromal cells (hBM MSCs) have multiple functions, critical for skeletal formation and function. Their functional heterogeneity, however, represents a major challenge for their isolation and in developing potency and release assays to predict their functionality prior to transplantation. Additionally, potency, biomarker profiles and defining mechanisms of action in a particular clinical setting are increasing requirements of Regulatory Agencies for release of hBM MSCs as Advanced Therapy Medicinal Products for cellular therapies. Since the healing of bone fractures depends on the coupling of new blood vessel formation with osteogenesis, we hypothesised that a correlation between the osteogenic and vascular supportive potential of individual hBM MSC-derived CFU-F (colony forming unit-fibroblastoid) clones might exist. METHODS We tested this by assessing the lineage (i.e. adipogenic (A), osteogenic (O) and/or chondrogenic (C)) potential of individual hBM MSC-derived CFU-F clones and determining if their osteogenic (O) potential correlated with their vascular supportive profile in vitro using lineage differentiation assays, endothelial-hBM MSC vascular co-culture assays and transcriptomic (RNAseq) analyses. RESULTS Our results demonstrate that the majority of CFU-F (95%) possessed tri-lineage, bi-lineage or uni-lineage osteogenic capacity, with 64% of the CFU-F exhibiting tri-lineage AOC potential. We found a correlation between the osteogenic and vascular tubule supportive activity of CFU-F clones, with the strength of this association being donor dependent. RNAseq of individual clones defined gene fingerprints relevant to this correlation. CONCLUSIONS This study identified a donor-dependent correlation between osteogenic and vascular supportive potential of hBM MSCs and important gene signatures that support these functions that are relevant to their bone regenerative properties.
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Affiliation(s)
- Alison T. Merryweather-Clarke
- Stem Cell Research, Nuffield Division of Clinical Laboratory Medicine, Radcliffe Department of Medicine, University of Oxford, John Radcliffe Hospital, Oxford, OX3 9BQ UK
- Stem Cell Research, NHS Blood and Transplant, John Radcliffe Hospital, Oxford, OX3 9BQ UK
| | - David Cook
- Stem Cell Research, Nuffield Division of Clinical Laboratory Medicine, Radcliffe Department of Medicine, University of Oxford, John Radcliffe Hospital, Oxford, OX3 9BQ UK
- Stem Cell Research, NHS Blood and Transplant, John Radcliffe Hospital, Oxford, OX3 9BQ UK
| | - Barbara Joo Lara
- Stem Cell Research, Nuffield Division of Clinical Laboratory Medicine, Radcliffe Department of Medicine, University of Oxford, John Radcliffe Hospital, Oxford, OX3 9BQ UK
- Stem Cell Research, NHS Blood and Transplant, John Radcliffe Hospital, Oxford, OX3 9BQ UK
| | - Peng Hua
- Stem Cell Research, Nuffield Division of Clinical Laboratory Medicine, Radcliffe Department of Medicine, University of Oxford, John Radcliffe Hospital, Oxford, OX3 9BQ UK
- Stem Cell Research, NHS Blood and Transplant, John Radcliffe Hospital, Oxford, OX3 9BQ UK
- Weatherall Institute of Molecular Medicine, Radcliffe Department of Medicine, John Radcliffe Hospital, Oxford, OX3 9BQ UK
| | - Emmanouela Repapi
- Weatherall Institute of Molecular Medicine, Radcliffe Department of Medicine, John Radcliffe Hospital, Oxford, OX3 9BQ UK
| | - Neil Ashley
- Weatherall Institute of Molecular Medicine, Radcliffe Department of Medicine, John Radcliffe Hospital, Oxford, OX3 9BQ UK
| | - Shiang Y. Lim
- Department of Surgery, University of Melbourne, Fitzroy, Victoria 3065 Australia
- O’Brien Institute Department, St. Vincent’s Institute of Medical Research, Fitzroy, Victoria 3065 Australia
| | - Suzanne M. Watt
- Stem Cell Research, Nuffield Division of Clinical Laboratory Medicine, Radcliffe Department of Medicine, University of Oxford, John Radcliffe Hospital, Oxford, OX3 9BQ UK
- Stem Cell Research, NHS Blood and Transplant, John Radcliffe Hospital, Oxford, OX3 9BQ UK
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Lee MN, Kweon HY, Oh GT. N-α-acetyltransferase 10 (NAA10) in development: the role of NAA10. Exp Mol Med 2018; 50:1-11. [PMID: 30054454 PMCID: PMC6063908 DOI: 10.1038/s12276-018-0105-2] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2018] [Accepted: 04/11/2018] [Indexed: 01/07/2023] Open
Abstract
N-α-acetyltransferase 10 (NAA10) is a subunit of Nα-terminal protein acetyltransferase that plays a role in many biological processes. Among the six N-α-acetyltransferases (NATs) in eukaryotes, the biological significance of the N-terminal acetyl-activity of Naa10 has been the most studied. Recent findings in a few species, including humans, indicate that loss of N-terminal acetylation by NAA10 is associated with developmental defects. However, very little is known about the role of NAA10, and more research is required in relation to the developmental process. This review summarizes recent studies to understand the function of NAA10 in the development of multicellular organisms. Further investigations are needed into the role of a key enzyme in biological development and its encoding gene. The enzyme N-α-acetyltransferase 10 (NAA10), encoded by the NAA10 gene, plays a role in multiple biological processes. While the function of NAA10 has been studied in cancer, less is known about the roles of the gene and the enzyme during development, according to a review by Goo Taeg Oh and co-workers at the Ewha Womans University in Seoul, South Korea. Mutations in NAA10 are found in patients with developmental delay, cardiac problems and skeletal abnormalities, while reduced enzyme activity is associated with developmental defects. Mouse studies suggest a role for NAA10 in neuronal development, bone formation and healthy sperm generation. The impact of variable NAA10 expression in different organs at different developmental stages needs clarification.
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Affiliation(s)
- Mi-Ni Lee
- Immune and Vascular Cell Network Research Center, National Creative Initiatives, Department of Life Sciences, Ewha Womans University, Seoul, Republic of Korea
| | - Hyae Yon Kweon
- Immune and Vascular Cell Network Research Center, National Creative Initiatives, Department of Life Sciences, Ewha Womans University, Seoul, Republic of Korea
| | - Goo Taeg Oh
- Immune and Vascular Cell Network Research Center, National Creative Initiatives, Department of Life Sciences, Ewha Womans University, Seoul, Republic of Korea.
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Hou S, Lin Q, Guan F, Lin C. LncRNA TNRC6C-AS1 regulates UNC5B in thyroid cancer to influence cell proliferation, migration, and invasion as a competing endogenous RNA of miR-129-5p. J Cell Biochem 2018; 119:8304-8316. [PMID: 29893424 DOI: 10.1002/jcb.26868] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2017] [Accepted: 03/21/2018] [Indexed: 12/14/2022]
Abstract
To investigate the biological functions and regulatory mechanism of lncRNA TNRC6C-AS1 in thyroid cancer (TC). TNRC6C-AS1, miR-129-5p, and UNC5B expression levels were investigated by qRT-PCR and Western blot. CCK-8 assay was conducted to determine cell proliferation, while transwell assay was for inspection of cell migration and invasion. Through bioinformatic analysis, the interactions among TNRC6C-AS1, miR-129-5p, and UNC5B were predicted. Dual luciferase reporter gene assay and RNA pull-down assay confirmed the predicted target relationships. Tumor xenograft assay was applied to inspect the effect of TNRC6C-AS1 downregulation on TC development in vivo. TNRC6C-AS1 and UNC5B were overexpressed, while miR-129-5p was underexpressed in TC tissues and cells. TNRC6C-AS1/UNC5B downregulation and miR-129-5p overexpression could suppress proliferation, migration, and invasion of TC cells as well as inhibit tumorigenesis in vivo. MiR-129-5p targeted TNRC6C-AS1 and UNC5B in TC cells; and UNC5B expression was downregulated by knocking down TNRC6C-AS1, which competitively bound with miR-129-5p. Downregulation of TNRC6C-AS1 restrained TC development by knocking down UNC5B through upregulating the expression of miR-129-5p.
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Affiliation(s)
- Sen Hou
- Department of Nuclear Medicine, the First Hospital of Jilin University, Changchun, Jilin, China
| | - Qiuyu Lin
- Department of Nuclear Medicine, the First Hospital of Jilin University, Changchun, Jilin, China
| | - Feng Guan
- Department of Nuclear Medicine, the First Hospital of Jilin University, Changchun, Jilin, China
| | - Chenghe Lin
- Department of Nuclear Medicine, the First Hospital of Jilin University, Changchun, Jilin, China
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8
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Sato T, Kokabu S, Enoki Y, Hayashi N, Matsumoto M, Nakahira M, Sugasawa M, Yoda T. Functional Roles of Netrin-1 in Osteoblast Differentiation. ACTA ACUST UNITED AC 2018; 31:321-328. [PMID: 28438858 DOI: 10.21873/invivo.11062] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2017] [Revised: 03/09/2017] [Accepted: 03/10/2017] [Indexed: 01/23/2023]
Abstract
AIM Recent studies have demonstrated that netrin-1 plays a vital role in bone metabolism. Previous studies have shown that osteoblasts produce netrin-1 which affects osteoclast differentiation. However, the role of netrin-1 in osteoblast differentiation is not well understood. In this study, we explored the roles of netrin-1 in osteoblasts. MATERIALS AND METHODS Quantitative reverse-transcriptase polymerase chain reaction (qPCR), RNA interference for netrin receptors, the generation of netrin-1 plasmid, transfection of plasmids, and cell proliferation assay were performed. RESULTS During osteoblast differentiation by ascorbic acid, netrin-1 expression was significantly decreased. Gene expression related with osteoblast differentiation was down-regulated by netrin-1 treatment. We also found that osteoblast differentiation by bone morphogenetic protein-4 (BMP-4) was inhibited in the presence of recombinant netrin-1. Forced expression of both BMP-4 and netrin-1 significantly decreased alkaline phosphatase expression. On the other hand, Unc5b, neogenin, and A2b which belong to netrin receptors were expressed by osteoblasts. Moreover, alkaline phosphatase expression was significantly decreased by knockdown for the combination of two receptors among these receptors. CONCLUSION Netrin-1 is involved in the regulation of osteoblast differentiation.
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Affiliation(s)
- Tsuyoshi Sato
- Department of Oral and Maxillofacial Surgery, Saitama Medical University, Saitama, Japan
| | - Shoichiro Kokabu
- Department of Oral and Maxillofacial Surgery, Saitama Medical University, Saitama, Japan.,Division of Molecular Signaling and Biochemistry, Department of Health Promotion, Kyushu Dental University, Kitakyushu, Japan
| | - Yuichiro Enoki
- Department of Oral and Maxillofacial Surgery, Saitama Medical University, Saitama, Japan
| | - Naoki Hayashi
- Department of Oral and Maxillofacial Surgery, Saitama Medical University, Saitama, Japan
| | - Masahito Matsumoto
- Division of Functional Genomics and Systems Medicine, Research Center for Genomic Medicine, Saitama Medical University, Saitama, Japan
| | - Mitsuhiko Nakahira
- Department of Head and Neck Surgery, Saitama Medical University International Medical Center, Saitama, Japan
| | - Masashi Sugasawa
- Department of Head and Neck Surgery, Saitama Medical University International Medical Center, Saitama, Japan
| | - Tetsuya Yoda
- Department of Oral and Maxillofacial Surgery, Saitama Medical University, Saitama, Japan
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Wu Y, Xu J, Chen J, Zou M, Rusidanmu A, Yang R. Blocking transferrin receptor inhibits the growth of lung adenocarcinoma cells in vitro. Thorac Cancer 2017; 9:253-261. [PMID: 29286585 PMCID: PMC5792724 DOI: 10.1111/1759-7714.12572] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2017] [Revised: 11/08/2017] [Accepted: 11/08/2017] [Indexed: 12/19/2022] Open
Abstract
Background Transferrin receptor (TfR) is expressed in most lung cancers and is an indicator of poor prognosis in certain groups of patients. In this study, we blocked cell surface TfR to inhibit lung adenocarcinoma (LAC) cell growth in vitro and investigated the associated molecular mechanisms to determine a potential therapeutic target in human LAC. Methods RNA interference and antibody blocking techniques were used to block the function of TfR in LAC cells, and cell proliferation assays were used to detect the results. Affymetrix microarray analysis was conducted using H1299 cells in which TfR was blocked with an antibody to investigate the molecular mechanisms involved. Results The cell proliferation assay demonstrated that H1299 cell proliferation was significantly inhibited after small interfering RNA knockdown or blocking of TfR. Mechanistic studies found that 100 genes were altered more than two‐fold after TfR was blocked and that blocking TfR was accompanied by decreased expression of the oncogene KRAS. Conclusion Our data provide evidence that blocking TfR could significantly inhibit LAC proliferation by targeting the oncogene KRAS; therefore, TfR may be a therapeutic target for LAC. In addition, our results suggest a new method for blocking the signal from the oncogene KRAS by targeting TfR in LAC.
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Affiliation(s)
- Yihe Wu
- Department of Thoracic Surgery, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, China
| | - Jinming Xu
- Department of Thoracic Surgery, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, China
| | - Jinbo Chen
- College of Medicine, Zhejiang University, Hangzhou, China
| | - Meirong Zou
- College of Medicine, Zhejiang University, Hangzhou, China
| | - Aizemaiti Rusidanmu
- Department of Thoracic Surgery, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, China
| | - Rong Yang
- Department of Radiology, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, China
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