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Mejbel HA, Morris J, Bahrami A. Aggressive fibromatosis-like tumour with ANGPTL2::USP6 fusion. Histopathology 2024; 84:1243-1245. [PMID: 38379048 DOI: 10.1111/his.15158] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2023] [Revised: 01/17/2024] [Accepted: 02/03/2024] [Indexed: 02/22/2024]
Affiliation(s)
- Haider A Mejbel
- Department of Pathology and Laboratory Medicine, Emory University School of Medicine, Atlanta, GA, USA
| | - Jonathan Morris
- Department of Orthopedic Surgery, Emory University School of Medicine, Atlanta, GA, USA
| | - Armita Bahrami
- Department of Pathology and Laboratory Medicine, Emory University School of Medicine, Atlanta, GA, USA
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Greatbatch CJ, Lu Q, Hung S, Barnett AJ, Wing K, Liang H, Han X, Zhou T, Siggs OM, Mackey DA, Cook AL, Senabouth A, Liu GS, Craig JE, MacGregor S, Powell JE, Hewitt AW. High throughput functional profiling of genes at intraocular pressure loci reveals distinct networks for glaucoma. Hum Mol Genet 2024; 33:739-751. [PMID: 38272457 PMCID: PMC11031357 DOI: 10.1093/hmg/ddae003] [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: 10/15/2023] [Revised: 12/18/2023] [Accepted: 04/06/2024] [Indexed: 01/27/2024] Open
Abstract
INTRODUCTION Primary open angle glaucoma (POAG) is a leading cause of blindness globally. Characterized by progressive retinal ganglion cell degeneration, the precise pathogenesis remains unknown. Genome-wide association studies (GWAS) have uncovered many genetic variants associated with elevated intraocular pressure (IOP), one of the key risk factors for POAG. We aimed to identify genetic and morphological variation that can be attributed to trabecular meshwork cell (TMC) dysfunction and raised IOP in POAG. METHODS 62 genes across 55 loci were knocked-out in a primary human TMC line. Each knockout group, including five non-targeting control groups, underwent single-cell RNA-sequencing (scRNA-seq) for differentially-expressed gene (DEG) analysis. Multiplexed fluorescence coupled with CellProfiler image analysis allowed for single-cell morphological profiling. RESULTS Many gene knockouts invoked DEGs relating to matrix metalloproteinases and interferon-induced proteins. We have prioritized genes at four loci of interest to identify gene knockouts that may contribute to the pathogenesis of POAG, including ANGPTL2, LMX1B, CAV1, and KREMEN1. Three genetic networks of gene knockouts with similar transcriptomic profiles were identified, suggesting a synergistic function in trabecular meshwork cell physiology. TEK knockout caused significant upregulation of nuclear granularity on morphological analysis, while knockout of TRIOBP, TMCO1 and PLEKHA7 increased granularity and intensity of actin and the cell-membrane. CONCLUSION High-throughput analysis of cellular structure and function through multiplex fluorescent single-cell analysis and scRNA-seq assays enabled the direct study of genetic perturbations at the single-cell resolution. This work provides a framework for investigating the role of genes in the pathogenesis of glaucoma and heterogenous diseases with a strong genetic basis.
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Affiliation(s)
- Connor J Greatbatch
- Menzies Institute for Medical Research, University of Tasmania, 17 Liverpool Street, Hobart, Tasmania 7000, Australia
| | - Qinyi Lu
- Menzies Institute for Medical Research, University of Tasmania, 17 Liverpool Street, Hobart, Tasmania 7000, Australia
| | - Sandy Hung
- Centre for Eye Research Australia, University of Melbourne, Royal Victorian Eye and Ear Hospital, 32 Gisborne St, East Melbourne 3002, Australia
| | - Alexander J Barnett
- Menzies Institute for Medical Research, University of Tasmania, 17 Liverpool Street, Hobart, Tasmania 7000, Australia
| | - Kristof Wing
- Menzies Institute for Medical Research, University of Tasmania, 17 Liverpool Street, Hobart, Tasmania 7000, Australia
| | - Helena Liang
- Centre for Eye Research Australia, University of Melbourne, Royal Victorian Eye and Ear Hospital, 32 Gisborne St, East Melbourne 3002, Australia
| | - Xikun Han
- QIMR Berghofer Medical Research Institute, 300 Herston Rd, Herston, Brisbane 4006, Australia
| | - Tiger Zhou
- Department of Ophthalmology, Flinders University, Flinders Medical Centre, 1 Flinders Dr, Bedford Park, South Australia 5042, Australia
| | - Owen M Siggs
- Garvan Institute of Medical Research, 384 Victoria St, Darlinghurst, Sydney, NSW 2010, Australia
- School of Clinical Medicine, Faculty of Medicine and Health, Short Street, St George Hospital KOGARAH UNSW, Sydney 2217, Australia
| | - David A Mackey
- Menzies Institute for Medical Research, University of Tasmania, 17 Liverpool Street, Hobart, Tasmania 7000, Australia
- Lions Eye Institute, Centre for Vision Sciences, University of Western Australia, 2 Verdun Street Nedlands WA 6009, Australia
| | - Anthony L Cook
- Wicking Dementia Research and Education Centre, University of Tasmania, 17 Liverpool Street, Hobart, TAS 7000, Australia
| | - Anne Senabouth
- Garvan-Weizmann Centre for Cellular Genomics, Garvan Institute of Medical Research, 384 Victoria St, Darlinghurst, Sydney, NSW 2010, Australia
| | - Guei-Sheung Liu
- Menzies Institute for Medical Research, University of Tasmania, 17 Liverpool Street, Hobart, Tasmania 7000, Australia
| | - Jamie E Craig
- Department of Ophthalmology, Flinders University, Flinders Medical Centre, 1 Flinders Dr, Bedford Park, South Australia 5042, Australia
| | - Stuart MacGregor
- QIMR Berghofer Medical Research Institute, 300 Herston Rd, Herston, Brisbane 4006, Australia
| | - Joseph E Powell
- Garvan-Weizmann Centre for Cellular Genomics, Garvan Institute of Medical Research, 384 Victoria St, Darlinghurst, Sydney, NSW 2010, Australia
- UNSW Cellular Genomics Futures Institute, University of New South Wales, 384 Victoria St, Darlinghurst, Sydney, NSW 2010, Australia
| | - Alex W Hewitt
- Menzies Institute for Medical Research, University of Tasmania, 17 Liverpool Street, Hobart, Tasmania 7000, Australia
- Centre for Eye Research Australia, University of Melbourne, Royal Victorian Eye and Ear Hospital, 32 Gisborne St, East Melbourne 3002, Australia
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Huang D, Yuan Y, Cao L, Zhang D, Jiang Y, Zhang Y, Chen C, Yu Z, Xie L, Wei Y, Wan J, Zheng J. Endothelial-derived small extracellular vesicles support B-cell acute lymphoblastic leukemia development. Cell Oncol (Dordr) 2024; 47:129-140. [PMID: 37751067 PMCID: PMC10899377 DOI: 10.1007/s13402-023-00855-0] [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] [Accepted: 08/01/2023] [Indexed: 09/27/2023] Open
Abstract
PURPOSE The bone marrow niche plays an important role in leukemia development. However, the contributions of different niche components to leukemia development and their underlying mechanisms remain largely unclear. METHOD Cre/LoxP-based conditional knockout technology was used to delete VPS33B or ANGPTL2 gene in niche cells. Murine B-ALL model was established by overexpressing the N-Myc oncogene in hematopoietic stem progenitor cells. The frequency of leukemia cells and immunophenotypic B220+ CD43+ LICs was detected by flow cytometry. SEVs was isolated by sequential centrifugation and mass spectrometry was performed to analyze the different components of SEVs. Immunoprecipitation and western blot were used to measure the interaction of VPS33B and ANGPTL2. RESULTS Here, we showed that specific knockout of vascular protein sorting 33b (Vps33b) in endothelial cells (ECs), but not megakaryocytes or mesenchymal stem cells, resulted in a significant decrease in the secretion of small extracellular vesicles (SEVs) and a delay in the development of B-cell lymphoblastic leukemia (B-ALL). Vps33b knockdown endothelial cells contained much lower levels of SEVs that contained angiopoietin-like protein 2 (ANGPTL2) than the control cells. Importantly, conditional knockout of Angptl2 in ECs significantly delayed B-ALL progression. Moreover, C-terminal region of ANGPTL2 (aa247-471) could directly interact with Sec1-like domain 1 of VPS33B (aa1-aa146). We further demonstrated that the point mutations R399H and G402S in ANGPTL2 led to a dramatic decrease in the secretion of ANGPTL2-SEVs. We also showed that wild-type ANGPTL2-containing SEVs, but not mutant ANGPTL2-containing SEVs, significantly enhanced B-ALL development. CONCLUSION In summary, our findings indicate that the secretion of ANGPTL2-containing SEVs in ECs sustains the leukemogenic activities of B-ALL cells, which is fine-tuned by the direct interaction of VPS33B and ANGPTL2. These findings reveal that niche-specific SEVs play an important role in B-ALL development.
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Affiliation(s)
- Dan Huang
- Hongqiao International Institute of Medicine, Shanghai Tongren Hospital, Key Laboratory of Cell Differentiation and Apoptosis of Chinese Ministry of Education, Faculty of Basic Medicine, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China
| | - Yamin Yuan
- Hongqiao International Institute of Medicine, Shanghai Tongren Hospital, Key Laboratory of Cell Differentiation and Apoptosis of Chinese Ministry of Education, Faculty of Basic Medicine, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China
| | - Liyuan Cao
- Hongqiao International Institute of Medicine, Shanghai Tongren Hospital, Key Laboratory of Cell Differentiation and Apoptosis of Chinese Ministry of Education, Faculty of Basic Medicine, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China
| | - Difan Zhang
- Department of Hematology, Xinhua Hospital, Affiliated to Shanghai, Jiao Tong University School of Medicine, Shanghai, 200092, China
| | - Yu Jiang
- Hongqiao International Institute of Medicine, Shanghai Tongren Hospital, Key Laboratory of Cell Differentiation and Apoptosis of Chinese Ministry of Education, Faculty of Basic Medicine, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China
| | - Yaping Zhang
- Hongqiao International Institute of Medicine, Shanghai Tongren Hospital, Key Laboratory of Cell Differentiation and Apoptosis of Chinese Ministry of Education, Faculty of Basic Medicine, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China
| | - Chiqi Chen
- Hongqiao International Institute of Medicine, Shanghai Tongren Hospital, Key Laboratory of Cell Differentiation and Apoptosis of Chinese Ministry of Education, Faculty of Basic Medicine, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China
| | - Zhuo Yu
- Hongqiao International Institute of Medicine, Shanghai Tongren Hospital, Key Laboratory of Cell Differentiation and Apoptosis of Chinese Ministry of Education, Faculty of Basic Medicine, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China
| | - Li Xie
- Hongqiao International Institute of Medicine, Shanghai Tongren Hospital, Key Laboratory of Cell Differentiation and Apoptosis of Chinese Ministry of Education, Faculty of Basic Medicine, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China
| | - Yujuan Wei
- Hongqiao International Institute of Medicine, Shanghai Tongren Hospital, Key Laboratory of Cell Differentiation and Apoptosis of Chinese Ministry of Education, Faculty of Basic Medicine, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China.
| | - Jiangbo Wan
- Department of Hematology, Xinhua Hospital, Affiliated to Shanghai, Jiao Tong University School of Medicine, Shanghai, 200092, China.
| | - Junke Zheng
- Hongqiao International Institute of Medicine, Shanghai Tongren Hospital, Key Laboratory of Cell Differentiation and Apoptosis of Chinese Ministry of Education, Faculty of Basic Medicine, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China.
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Robinson K, Mosley TJ, Rivera-González KS, Jabbarpour CR, Curtis SW, Adeyemo WL, Beaty TH, Butali A, Buxó CJ, Cutler DJ, Epstein MP, Gowans LJ, Hecht JT, Murray JC, Shaw GM, Uribe LM, Weinberg SM, Brand H, Marazita ML, Lipinski RJ, Leslie EJ. Trio-based GWAS identifies novel associations and subtype-specific risk factors for cleft palate. HGG Adv 2023; 4:100234. [PMID: 37719664 PMCID: PMC10502411 DOI: 10.1016/j.xhgg.2023.100234] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2023] [Accepted: 08/18/2023] [Indexed: 09/19/2023] Open
Abstract
Cleft palate (CP) is one of the most common craniofacial birth defects; however, there are relatively few established genetic risk factors associated with its occurrence despite high heritability. Historically, CP has been studied as a single phenotype, although it manifests across a spectrum of defects involving the hard and/or soft palate. We performed a genome-wide association study using transmission disequilibrium tests of 435 case-parent trios to evaluate broad risks for any cleft palate (ACP) (n = 435), and subtype-specific risks for any cleft soft palate (CSP), (n = 259) and any cleft hard palate (CHP) (n = 125). We identified a single genome-wide significant locus at 9q33.3 (lead SNP rs7035976, p = 4.24 × 10-8) associated with CHP. One gene at this locus, angiopoietin-like 2 (ANGPTL2), plays a role in osteoblast differentiation. It is expressed both in craniofacial tissue of human embryos and developing mouse palatal shelves. We found 19 additional loci reaching suggestive significance (p < 5 × 10-6), of which only one overlapped between groups (chromosome 17q24.2, ACP and CSP). Odds ratios for the 20 loci were most similar across all 3 groups for SNPs associated with the ACP group, but more distinct when comparing SNPs associated with either subtype. We also found nominal evidence of replication (p < 0.05) for 22 SNPs previously associated with orofacial clefts. Our study to evaluate CP risks in the context of its subtypes and we provide newly reported associations affecting the broad risk for CP as well as evidence of subtype-specific risks.
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Affiliation(s)
- Kelsey Robinson
- Department of Human Genetics, Emory University, Atlanta, GA 30322, USA
| | - Trenell J. Mosley
- Department of Human Genetics, Emory University, Atlanta, GA 30322, USA
| | - Kenneth S. Rivera-González
- Department of Comparative Biosciences, School of Veterinary Medicine, University of Wisconsin-Madison, Madison, WI 53706, USA
| | - Christopher R. Jabbarpour
- Department of Comparative Biosciences, School of Veterinary Medicine, University of Wisconsin-Madison, Madison, WI 53706, USA
| | - Sarah W. Curtis
- Department of Human Genetics, Emory University, Atlanta, GA 30322, USA
| | - Wasiu Lanre Adeyemo
- Department of Oral and Maxillofacial Surgery, College of Medicine, University of Lagos, Lagos 101017, Nigeria
| | - Terri H. Beaty
- Department of Epidemiology, Johns Hopkins University, Baltimore, MD 21218, USA
| | - Azeez Butali
- Department of Oral Biology, Radiology, and Medicine, University of Iowa, Iowa City, IA 52242, USA
| | - Carmen J. Buxó
- School of Dental Medicine, University of Puerto Rico, San Juan, PR 00925, USA
| | - David J. Cutler
- Department of Human Genetics, Emory University, Atlanta, GA 30322, USA
| | | | - Lord J.J. Gowans
- Department of Biochemistry and Biotechnology, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana
| | - Jacqueline T. Hecht
- Department of Pediatrics, McGovern Medical School University of Texas Health at Houston, Houston, TX 77030, USA
| | - Jeffrey C. Murray
- Department of Pediatrics, University of Iowa, Iowa City, IA 52242, USA
| | - Gary M. Shaw
- Department of Pediatrics, Stanford University, Stanford, CA 94305, USA
| | - Lina Moreno Uribe
- Department of Orthodontics & The Iowa Institute for Oral Health Research, University of Iowa, Iowa City, IA 52242, USA
| | - Seth M. Weinberg
- Center for Craniofacial and Dental Genetics, Department of Oral and Craniofacial Sciences, School of Dental Medicine, and Department of Human Genetics, School of Public Health, University of Pittsburgh, Pittsburgh, PA 15260, USA
| | - Harrison Brand
- Center for Genomic Medicine, Massachusetts General Hospital, Boston, MA 02114, USA
| | - Mary L. Marazita
- Center for Craniofacial and Dental Genetics, Department of Oral and Craniofacial Sciences, School of Dental Medicine, and Department of Human Genetics, School of Public Health, University of Pittsburgh, Pittsburgh, PA 15260, USA
| | - Robert J. Lipinski
- Department of Comparative Biosciences, School of Veterinary Medicine, University of Wisconsin-Madison, Madison, WI 53706, USA
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Wang QQ, Zhou L, Qin G, Tan C, Zhou YC, Yao SK. Leukocyte immunoglobulin-like receptor B2 overexpression as a promising therapeutic target and noninvasive screening biomarker for colorectal cancer. World J Gastroenterol 2023; 29:5313-5326. [PMID: 37899785 PMCID: PMC10600801 DOI: 10.3748/wjg.v29.i37.5313] [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] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/15/2023] [Revised: 09/08/2023] [Accepted: 09/14/2023] [Indexed: 09/25/2023] Open
Abstract
BACKGROUND Colorectal cancer (CRC) has become the second most deadly malignancy in the world, and the exploration of screening markers and precise therapeutic targets is urgent. Our previous research identified leukocyte immunoglobulin-like receptor B2 (LILRB2) protein as a characteristic protein of CRC, but the association between LILRB2 expression and clinicopathological features, the internal mechanism related to CRC progression, and screening diagnostic efficacy are not clear. Therefore, we hypothesized that LILRB2 is significantly highly expressed in CRC tissues, correlated with advanced stage and a poor prognosis, and could be used as a therapeutic target and potential screening biomarker for CRC. AIM To explore whether LILRB2 can be used as a potential therapeutic target and noninvasive screening biomarker for CRC. METHODS Patients who underwent radical surgery for CRC at China-Japan Friendship Hospital between February 2021 and October 2022 were included. Cancer and paracancerous tissues were collected to verify LILRB2 expression, and the association between LILRB2 expression and clinicopathological features was analysed. Serum was collected from CRC patients, adenoma patients and healthy controls during the same period to assess the diagnostic value of LILRB2 as a noninvasive screening biomarker, and its diagnostic value was further compared with that of the traditional markers carcinoembryonic antigen (CEA) and carbohydrate antigen 19-9 (CA19-9). RESULTS A total of 58 CRC patients were included, and LILRB2 protein was significantly overexpressed in cancer tissues compared with paracancerous tissues (P < 0.001). Angiopoietin-like protein 2 (ANGPTL2) protein, as the ligand of LILRB2, was synergistically overexpressed in CRC tissues (P < 0.001), and overexpression of LILRB2 and ANGPTL2 protein was significantly correlated with poor to moderate differentiation, vascular involvement, lymph node metastasis, distant metastasis, advanced tumor-node-metastasis stage and a poor prognosis (P < 0.05), which suggested that LILRB2 and ANGPTL2 are closely associated with CRC progression. In addition, serum LILRB2 concentrations increased stepwise in healthy individuals, adenoma patients and CRC patients with statistically significant differences. The sensitivity of serum LILRB2 for the diagnosis of CRC was 89.74%, the specificity was 88.89%, the area under the curve was 0.95, and the diagnostic efficacy was better than that of conventional CEA and CA19-9. CONCLUSION LILRB2 protein can be used as a potential novel therapeutic target and noninvasive screening biomarker for CRC, which is beneficial for early screening and precise treatment.
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Affiliation(s)
- Qian-Qian Wang
- Department of Gastroenterology, Peking University China-Japan Friendship School of Clinical Medicine, Beijing 100029, China
| | - Lei Zhou
- Department of General Surgery, China-Japan Friendship Hospital, Beijing 100029, China
| | - Geng Qin
- Department of Gastroenterology, China-Japan Friendship Hospital, Beijing 100029, China
| | - Chang Tan
- Department of Gastroenterology, Peking University China-Japan Friendship School of Clinical Medicine, Beijing 100029, China
| | - Yuan-Chen Zhou
- Department of Gastroenterology, Peking University China-Japan Friendship School of Clinical Medicine, Beijing 100029, China
| | - Shu-Kun Yao
- Department of Gastroenterology, Peking University China-Japan Friendship School of Clinical Medicine, Beijing 100029, China
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Li J, Wan T, Liu C, Liu H, Ke D, Li L. ANGPTL2 aggravates LPS-induced septic cardiomyopathy via NLRP3-mediated inflammasome in a DUSP1-dependent pathway. Int Immunopharmacol 2023; 123:110701. [PMID: 37531825 DOI: 10.1016/j.intimp.2023.110701] [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] [Received: 05/28/2023] [Revised: 07/04/2023] [Accepted: 07/20/2023] [Indexed: 08/04/2023]
Abstract
Angiopoietin-like protein 2 (ANGPTL2) was implicated in various cardiovascular diseases; however, its role in lipopolysaccharide (LPS)-related septic cardiomyopathy remains unclear. Herein, mice were exposed to LPS to generate septic cardiomyopathy, and adeno-associated viral vector was employed to overexpress ANGPTL2 in the myocardium. Besides, mice were treated with adenoviral vector to knock down ANGPTL2 in hearts. ANGPTL2 expressions in hearts and cardiomyocytes were upregulated by LPS challenge. ANGPTL2 overexpression aggravated, while ANGPTL2 silence ameliorated LPS-associated cardiac impairment and inflammation. Mechanically, we found that ANGPTL2 activated NLRP3 inflammasome via suppressing DUSP1 signaling, and NLRP3 knockdown abrogated the detrimental role of ANGPTL2 in aggravating LPS-induced cardiac inflammation. Furthermore, DUSP1 overexpression significantly inhibited ANGPTL2-mediated NLRP3 activation, and subsequently improved LPS-related cardiac dysfunction. In summary, ANGPTL2 exacerbated septic cardiomyopathy via activating NLRP3-mediated inflammation in a DUSP1-dependent manner, and our study uncovered a promising therapeutic target in preventing septic cardiomyopathy.
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Affiliation(s)
- Jun Li
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan 430060, Hubei, China; Cardiovascular Research Institute, Wuhan University, Wuhan 430060, Hubei, China
| | - Ting Wan
- Department of Gynecology, Renmin Hospital of Wuhan University, Wuhan 430060, Hubei, China
| | - Cheng Liu
- Department of Cardiology, Shenzhen People's Hospital (The Second Clinical Medical College, Jinan University, The First Affiliated Hospital, Southern University of Science and Technology), Shenzhen 518020, Guangdong, China; Shenzhen Cardiovascular Minimally Invasive Medical Engineering Technology Research and Development Center, Shenzhen 518020, Guangdong, China
| | - Huadong Liu
- Department of Cardiology, Shenzhen People's Hospital (The Second Clinical Medical College, Jinan University, The First Affiliated Hospital, Southern University of Science and Technology), Shenzhen 518020, Guangdong, China; Shenzhen Cardiovascular Minimally Invasive Medical Engineering Technology Research and Development Center, Shenzhen 518020, Guangdong, China
| | - Dong Ke
- Department of Gastrointestinal Surgery, Renmin Hospital of Wuhan University, Wuhan 430060, Hubei, China.
| | - Luocheng Li
- Department of Cardiovascular Surgery, Renmin Hospital of Wuhan University, Wuhan 430060, Hubei, China.
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Horiguchi H, Kadomatsu T, Yamashita T, Yumoto S, Terada K, Sato M, Morinaga J, Miyata K, Oike Y. ANGPTL2 promotes immune checkpoint inhibitor-related murine autoimmune myocarditis. Commun Biol 2023; 6:965. [PMID: 37736764 PMCID: PMC10517162 DOI: 10.1038/s42003-023-05338-4] [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: 04/17/2023] [Accepted: 09/08/2023] [Indexed: 09/23/2023] Open
Abstract
Use of immune checkpoint inhibitors (ICIs) as cancer immunotherapy advances rapidly in the clinic. Despite their therapeutic benefits, ICIs can cause clinically significant immune-related adverse events (irAEs), including myocarditis. However, the cellular and molecular mechanisms regulating irAE remain unclear. Here, we investigate the function of Angiopoietin-like protein 2 (ANGPTL2), a potential inflammatory mediator, in a mouse model of ICI-related autoimmune myocarditis. ANGPTL2 deficiency attenuates autoimmune inflammation in these mice, an outcome associated with decreased numbers of T cells and macrophages. We also show that cardiac fibroblasts express abundant ANGPTL2. Importantly, cardiac myofibroblast-derived ANGPTL2 enhances expression of chemoattractants via the NF-κB pathway, accelerating T cell recruitment into heart tissues. Our findings suggest an immunostimulatory function for ANGPTL2 in the context of ICI-related autoimmune inflammation and highlight the pathophysiological significance of ANGPTL2-mediated cardiac myofibroblast/immune cell crosstalk in enhancing autoimmune responses. These findings overall provide insight into mechanisms regulating irAEs.
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Affiliation(s)
- Haruki Horiguchi
- Department of Molecular Genetics, Graduate School of Medical Science, Kumamoto University, Kumamoto, 860-8556, Japan
- Department of Aging and Geriatric Medicine, Graduate School of Medical Science, Kumamoto University, Kumamoto, 860-8556, Japan
| | - Tsuyoshi Kadomatsu
- Department of Molecular Genetics, Graduate School of Medical Science, Kumamoto University, Kumamoto, 860-8556, Japan.
- Center for Metabolic Regulation of Healthy Aging (CMHA), Graduate School of Medical Sciences, Kumamoto University, Kumamoto, 860-8556, Japan.
| | - Tomoya Yamashita
- Department of Molecular Genetics, Graduate School of Medical Science, Kumamoto University, Kumamoto, 860-8556, Japan
| | - Shinsei Yumoto
- Department of Molecular Genetics, Graduate School of Medical Science, Kumamoto University, Kumamoto, 860-8556, Japan
- Department of Gastroenterological Surgery, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, 860-8556, Japan
| | - Kazutoyo Terada
- Department of Molecular Genetics, Graduate School of Medical Science, Kumamoto University, Kumamoto, 860-8556, Japan
- Center for Metabolic Regulation of Healthy Aging (CMHA), Graduate School of Medical Sciences, Kumamoto University, Kumamoto, 860-8556, Japan
| | - Michio Sato
- Department of Molecular Genetics, Graduate School of Medical Science, Kumamoto University, Kumamoto, 860-8556, Japan
| | - Jun Morinaga
- Department of Molecular Genetics, Graduate School of Medical Science, Kumamoto University, Kumamoto, 860-8556, Japan
| | - Keishi Miyata
- Department of Molecular Genetics, Graduate School of Medical Science, Kumamoto University, Kumamoto, 860-8556, Japan
- Center for Metabolic Regulation of Healthy Aging (CMHA), Graduate School of Medical Sciences, Kumamoto University, Kumamoto, 860-8556, Japan
| | - Yuichi Oike
- Department of Molecular Genetics, Graduate School of Medical Science, Kumamoto University, Kumamoto, 860-8556, Japan.
- Department of Aging and Geriatric Medicine, Graduate School of Medical Science, Kumamoto University, Kumamoto, 860-8556, Japan.
- Center for Metabolic Regulation of Healthy Aging (CMHA), Graduate School of Medical Sciences, Kumamoto University, Kumamoto, 860-8556, Japan.
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Liu X, Qin J, Nie J, Gao R, Hu S, Sun H, Wang S, Pan Y. ANGPTL2+cancer-associated fibroblasts and SPP1+macrophages are metastasis accelerators of colorectal cancer. Front Immunol 2023; 14:1185208. [PMID: 37691929 PMCID: PMC10483401 DOI: 10.3389/fimmu.2023.1185208] [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] [Received: 03/13/2023] [Accepted: 08/09/2023] [Indexed: 09/12/2023] Open
Abstract
Background Liver metastasis (LM) is a leading cause of cancer-related deaths in CRC patients, whereas the associated mechanisms have not yet been fully elucidated. Therefore, it is urgently needed to deeply explore novel metastasis accelerators and therapeutic targets of LM-CRC. Methods The bulk RNA sequencing data and clinicopathological information of CRC patients were enrolled from the TCGA and GEO databases. The single-cell RNA sequencing (scRNA-seq) datasets of CRC were collected from and analyzed in the Tumor Immune Single-cell Hub (TISCH) database. The infiltration levels of cancer-associated fibroblasts (CAFs) and macrophages in CRC tissues were estimated by multiple immune deconvolution algorithms. The prognostic values of genes were identified by the Kaplan-Meier curve with a log-rank test. GSEA analysis was carried out to annotate the significantly enriched gene sets. The biological functions of cells were experimentally verified. Results In the present study, hundreds of differentially expressed genes (DEGs) were selected in LM-CRC compared to primary CRC, and these DEGs were significantly associated with the regulation of endopeptidase activity, blood coagulation, and metabolic processes. Then, SPP1, CAV1, ANGPTL2, and COLEC11 were identified as the characteristic DEGs of LM-CRC, and higher expression levels of SPP1 and ANGPTL2 were significantly associated with worse clinical outcomes of CRC patients. In addition, ANGPTL2 and SPP1 mainly distributed in the tumor microenvironment (TME) of CRC tissues. Subsequent scRNA-seq analysis demonstrated that ANGPTL2 and SPP1 were markedly enriched in the CAFs and macrophages of CRC tissues, respectively. Moreover, we identified the significantly enriched gene sets in LM-CRC, especially those in the SPP1+macrophages and ANGPTL2+CAFs, such as the HALLMARK_EPITHELIAL_MESENCHYMAL_TRANSITION and the HALLMARK_COMPLEMENT. Finally, our in vitro experiments proved that ANGPTL2+CAFs and SPP1+macrophages promote the metastasis of CRC cells. Conclusion Our study selected four characteristic genes of LM-CRC and identified ANGPTL2+CAFs and SPP1+macrophages subtypes as metastasis accelerators of CRC which provided a potential therapeutic target for LM-CRC.
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Affiliation(s)
- Xiangxiang Liu
- General Clinical Research Center, Nanjing First Hospital, Nanjing Medical University, Nanjing, Jiangsu, China
| | - Jian Qin
- General Clinical Research Center, Nanjing First Hospital, Nanjing Medical University, Nanjing, Jiangsu, China
| | - Junjie Nie
- General Clinical Research Center, Nanjing First Hospital, Nanjing Medical University, Nanjing, Jiangsu, China
| | - Rui Gao
- Division of Clinical Pharmacy, General Clinical Research Center, Nanjing First Hospital, China Pharmaceutical University, Nanjing, Jiangsu, China
| | - Shangshang Hu
- General Clinical Research Center, Nanjing First Hospital, Nanjing Medical University, Nanjing, Jiangsu, China
| | - Huiling Sun
- General Clinical Research Center, Nanjing First Hospital, Nanjing Medical University, Nanjing, Jiangsu, China
| | - Shukui Wang
- General Clinical Research Center, Nanjing First Hospital, Nanjing Medical University, Nanjing, Jiangsu, China
- Jiangsu Collaborative Innovation Center on Cancer Personalized Medicine, Nanjing Medical University, Nanjing, Jiangsu, China
| | - Yuqin Pan
- General Clinical Research Center, Nanjing First Hospital, Nanjing Medical University, Nanjing, Jiangsu, China
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9
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Takeshita Y, Motohara T, Kadomatsu T, Doi T, Obayashi K, Oike Y, Katabuchi H, Endo M. Angiopoietin-like protein 2 decreases peritoneal metastasis of ovarian cancer cells by suppressing anoikis resistance. Biochem Biophys Res Commun 2021; 561:26-32. [PMID: 34000514 DOI: 10.1016/j.bbrc.2021.05.008] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2021] [Accepted: 05/05/2021] [Indexed: 12/12/2022]
Abstract
Peritoneal metastasis is a common mode of spread of ovarian cancer. Despite therapeutic advances, some patients have intractable peritoneal metastasis. Therefore, in-depth characterization of the molecular mechanism of peritoneal metastasis is a key imperative. Angiopoietin-like protein 2 (ANGPTL2) is an inflammatory factor which activates NF-κB signaling and plays an important role in the pathogenesis of various inflammatory diseases including cancers, such as lung and breast cancer. In this study, we examined the role of ANGPTL2 in ovarian cancer peritoneal metastasis. We observed no difference of cell proliferation between ANGPTL2-expressing and control cells. In the mouse intraperitoneal xenograft model, formation of peritoneal metastasis by ANGPTL2-expressing cells was significantly decreased compared to control. In the in vitro analysis, the expressions of integrin α5β1, α6, and β4, but not those of αvβ3, α3, α4, and β1, were significantly decreased in ANGPTL2-expressing cells compared to control cells. ANGPTL2-expressing cells showed significantly inhibited adherence to laminin compared to control. In addition, we observed upregulation of anoikis (a form of programmed cell death occurring under an anchorage-independent condition) and significant decrease in the expression of Bcl-2 in ANGPTL2-expressing cells as compared to control cells. These results suggest that ANGPTL2 expression in ovarian cancer cells represses peritoneal metastasis by suppressing anoikis resistance.
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Affiliation(s)
- Yuko Takeshita
- Department of Molecular Genetics, Faculty of Life Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto, 860-8556, Japan; Department of Obstetrics and Gynecology, Faculty of Life Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto, 860-8556, Japan
| | - Takeshi Motohara
- Department of Obstetrics and Gynecology, Faculty of Life Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto, 860-8556, Japan
| | - Tsuyoshi Kadomatsu
- Department of Molecular Genetics, Faculty of Life Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto, 860-8556, Japan
| | - Tomomitsu Doi
- Department of Molecular Biology, University of Occupational and Environmental Health, Japan, 1-1 Iseigaoka, Yahatanishi-ku, Kitakyushu, Fukuoka, 807-8555, Japan
| | - Kunie Obayashi
- Department of Molecular Biology, University of Occupational and Environmental Health, Japan, 1-1 Iseigaoka, Yahatanishi-ku, Kitakyushu, Fukuoka, 807-8555, Japan
| | - Yuichi Oike
- Department of Molecular Genetics, Faculty of Life Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto, 860-8556, Japan
| | - Hidetaka Katabuchi
- Department of Obstetrics and Gynecology, Faculty of Life Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto, 860-8556, Japan
| | - Motoyoshi Endo
- Department of Molecular Biology, University of Occupational and Environmental Health, Japan, 1-1 Iseigaoka, Yahatanishi-ku, Kitakyushu, Fukuoka, 807-8555, Japan.
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10
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Xie P, Wang H, Fang J, Du D, Tian Z, Zhen J, Liu Y, Ding Y, Fu B, Liu F, Huang D, Yu J. CSN5 Promotes Carcinogenesis of Thyroid Carcinoma Cells Through ANGPTL2. Endocrinology 2021; 162:6122687. [PMID: 33508120 DOI: 10.1210/endocr/bqaa206] [Citation(s) in RCA: 3] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/02/2020] [Indexed: 12/13/2022]
Abstract
COP9 signalosome subunit 5 (CSN5) plays a key role in carcinogenesis of multiple cancers and contributes to the stabilization of target proteins through deubiquitylation. However, the underlying role of CSN5 in thyroid carcinoma has not been reported. In this research, our data showed that CSN5 was overexpressed in thyroid carcinoma tissues compared with paracancerous tissues. Furthermore, a series of gain/loss functional assays were performed to demonstrate the role of CSN5 in facilitating thyroid carcinoma cell proliferation and metastasis. Additionally, we found there was a positive correlation between CSN5 and angiopoietin-like protein 2 (ANGPTL2) protein levels in thyroid carcinoma tissues and that CSN5 promoted thyroid carcinoma cell proliferation and metastasis through ANGPTL2. We also identified the underlying mechanism that CSN5 elevated ANGPTL2 protein level by directly binding it, decreasing its ubiquitination and degradation. Overall, our results highlight the significance of CSN5 in promoting thyroid carcinoma carcinogenesis and implicate CSN5 as a promising candidate for thyroid carcinoma treatment.
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Affiliation(s)
- Peiyi Xie
- Department of General Surgery, Second Affiliated Hospital of Nanchang University, Nanchang, China
| | - Hui Wang
- Department of Endocrinology and Metabolism, Shanghai Clinical Center for Endocrine and Metabolic Diseases, Shanghai Institute of Endocrine and Metabolic Diseases, Ruijin Hospital, China National Research Center for Metabolic Diseases, Shanghai Jiao Tong University School of Medicine, China
| | - Jiayu Fang
- Second College of Clinical Medicine, Nanchang University, China
| | - Dongnian Du
- Department of General Surgery, Second Affiliated Hospital of Nanchang University, Nanchang, China
| | - Ze Tian
- Second College of Clinical Medicine, Nanchang University, China
| | - Jing Zhen
- Second College of Clinical Medicine, Nanchang University, China
| | - Yue Liu
- Second College of Clinical Medicine, Nanchang University, China
| | - Yongqi Ding
- Second College of Clinical Medicine, Nanchang University, China
| | - Bidong Fu
- Second College of Clinical Medicine, Nanchang University, China
| | - Fanrong Liu
- Department of Pathology, Second Affiliated Hospital of Nanchang University, Nanchang, China
| | - Da Huang
- Department of Thyroid Surgery, Second Affiliated Hospital of Nanchang University, Nanchang, Jiangxi Province, China
| | - Jichun Yu
- Department of Thyroid Surgery, Second Affiliated Hospital of Nanchang University, Nanchang, Jiangxi Province, China
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11
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Yin R, Zhang N, Zhang D, Zhao W, Ke J, Zhao D. Higher levels of circulating ANGPTL2 are associated with macular edema in patients with type 2 diabetes. Medicine (Baltimore) 2021; 100:e24638. [PMID: 33578584 PMCID: PMC7886454 DOI: 10.1097/md.0000000000024638] [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] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/03/2020] [Accepted: 01/15/2021] [Indexed: 01/05/2023] Open
Abstract
Macular edema (ME) is an inflammatory disease characterized by increased microvascular permeability. Here, we proposed that plasma angiopoietin-like protein 2 (ANGPTL2) level may be related to the severity of ME patients with type 2 diabetes mellitus (T2DM). In this cross-sectional study, 172 T2DM patients were recruited and divided into clinically significant macular edema (CSME), non-CSME (nCSME), and control groups. Serum ANGPTL2 level was quantified by ELISA and best corrected vision acuity (BCVA) was detected. After adjust age, sex, body mass index (BMI), and duration of diabetes variables, ANGPTL2 performed statistics difference among CSME-, nCSME-groups, and control group (4.46 [3.97, 4.96, 95%CI] ng/mL in CSME group, 3.80 [3.42, 4.18, 95%CI] ng/mL in nCSME-group, 3.33 [3.03, 3.63, 95%CI] ng/mL in control, P < .01). After adjustment of confounding factors, high levels of circulating ANGPTL2 were related with the diagnosis of ME, BCVA, and C reactive protein (CRP) through univariate regression analysis (P < .05). Meanwhile, in the multiple regression model, ANGPTL2 took the mainly effect proportion for the diagnosis of diabetic macular edema (DME), with a LogWorth value 3.559 (P < .001). Our study suggested that elevated circulating ANGPTL2 may be associated with the development of DME and the severity of visual impairment in patients with type 2 diabetes.
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Affiliation(s)
- Ruili Yin
- Center for Endocrine Metabolism and Immune Diseases, Beijing Luhe Hospital, Capital Medical University
- Beijing Key Laboratory of Diabetes Research and Care
| | - Ning Zhang
- Center for Endocrine Metabolism and Immune Diseases, Beijing Luhe Hospital, Capital Medical University
- Beijing Key Laboratory of Diabetes Research and Care
| | - Dawei Zhang
- Department of Ophthalmology, Beijing Luhe Hospital Capital Medical University, Beijing, 101149, China
| | - Wenying Zhao
- Center for Endocrine Metabolism and Immune Diseases, Beijing Luhe Hospital, Capital Medical University
| | - Jing Ke
- Center for Endocrine Metabolism and Immune Diseases, Beijing Luhe Hospital, Capital Medical University
| | - Dong Zhao
- Center for Endocrine Metabolism and Immune Diseases, Beijing Luhe Hospital, Capital Medical University
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12
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Zhu P, Wu Y, Gu Y, Li C. JAB1 Promotes High Glucose-Induced Inflammation and Extracellular Matrix Deposition in Glomerular Mesangial Cells by Regulating Angiopoietin-Like Protein 2. Folia Biol (Praha) 2021; 67:191-198. [PMID: 35439852] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Diabetic or hyperglycaemic conditions stimulate the inflammatory response, excessive accumulation of extracellular matrix, and result in glomerulosclerosis, a scarring process of diabetic nephropathy. c-Jun activation domain-binding protein 1 (JAB1) functions as a regulator of pathways involved in cellular apoptosis and proliferation. The role of JAB1 in diabetic nephropathy was investigated in this study. Firstly, glomerular mesangial cells (GMCs) were treated with high glucose, and high glucose conditions induced up-regulation of JAB1 in the GMCs. Moreover, IL-6, TNF-α, MCP-1, and IL-1β were also elevated in high glucose-induced GMCs. Secondly, silencing of JAB1 reduced the levels of IL-6, TNF-α, MCP-1, and IL-1β in high glucose-induced GMCs. In addition, silencing of JAB1 attenuated the high glucose-induced decrease of superoxide dismutase (SOD) and the increase of reactive oxygen species (ROS) and malondialdehyde (MDA). The increased TGF-β1, collagen I, collagen IV, and fibronectin levels in high glucose-induced GMCs were restored by knockdown of JAB1. Thirdly, angiopoietin-like protein 2 (ANGPTL2) expression was reduced by JAB1. Over-expression of ANGPTL2 weakened the JAB1 silence-induced decrease of IL-6, TNF-α, MCP-1, IL-1β, TGF-β1, collagen I, collagen IV, and fibronectin. In conclusion, silencing of JAB1 reduced extracellular matrix deposition and suppressed inflammation in high glucose-induced GMCs through down-regulation of ANGPTL2.
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Affiliation(s)
- P Zhu
- Department of General Practice, Shanghai International Medical Center, Shanghai, China
| | - Y Wu
- Department of Endocrinology, Shanghai International Medical Center, Shanghai, China
| | - Y Gu
- Department of Internal Medicine, Shanghai International Medical Center, Shanghai, China
| | - C Li
- Department of General Practice, Shanghai International Medical Center, Shanghai, China
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13
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Abstract
BACKGROUND Circulating angiopoietin-like 2 (ANGPTL2) protein levels are known to be significantly increased in numerous chronic inflammatory diseases and are associated with the diagnosis and/or prognosis of cardiovascular diseases, diabetes, chronic kidney disease, and various types of cancers. However, no data regarding the relationship between ANGPTL2 and diabetic foot ulcers (DFUs) are available. Here, we explored the potential link between ANGPTL2 and DFUs. METHODS A total of 68 participants with type 2 diabetes mellitus (T2DM) were recruited, including 28 patients with DFU and 40 diabetic patients without DFUs. The clinical characteristics of T2DM patients with and without DFUs were compared. Serum concentrations of ANGPTL2 and VEGF were measured using enzyme-linked immunosorbent assay (ELISA) kits. The correlations between ANGPTL2 and clinical variables were analyzed. Multiple linear regression and logistic regression models were constructed to test the associations between ANGPTL2 and the severity and presence of DFUs. RESULTS Serum levels of ANGPTL2 were higher in patients with DFUs than those in diabetic controls. Serum ANGPTL2 levels were higher in the advanced stages of DFUs. Spearman correlation analysis revealed strong positive associations of ANGPTL2 with CRP, VEGF and ESR in all subjects. In addition, serum ANGPTL2 was still positively correlated with DFUs stage after adjusting the risk factors. After adjusting for age, sex, HbA1C and duration of diabetes, ANGPTL2 was found to be independently associated with the presence of DFUs. CONCLUSIONS Circulating ANGPTL2 levels are an independent risk factor for DFUs. This suggests that ANGPTL2 may play important roles in the development of DFUs, a possibility that needs to investigated in prospective studies.
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Affiliation(s)
- Yan Wang
- Center for Endocrine Metabolism and Immune Diseases, Beijing Luhe Hospital, Capital Medical University, Beijing, 101149 China
- Beijing Key Laboratory of Diabetes Research and Care, Beijing, 101149 China
| | - Zhaohui Zheng
- Center for Endocrine Metabolism and Immune Diseases, Beijing Luhe Hospital, Capital Medical University, Beijing, 101149 China
- Beijing Key Laboratory of Diabetes Research and Care, Beijing, 101149 China
| | - Yuxian Yang
- Center for Endocrine Metabolism and Immune Diseases, Beijing Luhe Hospital, Capital Medical University, Beijing, 101149 China
- Beijing Key Laboratory of Diabetes Research and Care, Beijing, 101149 China
| | - Jianan Lang
- Center for Endocrine Metabolism and Immune Diseases, Beijing Luhe Hospital, Capital Medical University, Beijing, 101149 China
- Beijing Key Laboratory of Diabetes Research and Care, Beijing, 101149 China
| | - Ning Zhang
- Center for Endocrine Metabolism and Immune Diseases, Beijing Luhe Hospital, Capital Medical University, Beijing, 101149 China
- Beijing Key Laboratory of Diabetes Research and Care, Beijing, 101149 China
| | - Longyan Yang
- Center for Endocrine Metabolism and Immune Diseases, Beijing Luhe Hospital, Capital Medical University, Beijing, 101149 China
- Beijing Key Laboratory of Diabetes Research and Care, Beijing, 101149 China
| | - Dong Zhao
- Center for Endocrine Metabolism and Immune Diseases, Beijing Luhe Hospital, Capital Medical University, Beijing, 101149 China
- Beijing Key Laboratory of Diabetes Research and Care, Beijing, 101149 China
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14
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Wang D, Guo Y, Chai S, Shen K, Li Y, Zhao R. Expression of angiopoietin-like protein 2 in ovarian tissue of rat polycystic ovarian syndrome model and its correlation study. Reprod Biol Endocrinol 2020; 18:94. [PMID: 32988397 PMCID: PMC7520960 DOI: 10.1186/s12958-020-00651-7] [Citation(s) in RCA: 4] [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] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/19/2019] [Accepted: 09/17/2020] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND This study investigated the expression of angiopoietin-like protein 2 (ANGPTL2) in the tissues of rat models of polycystic ovary syndrome (PCOS) and its correlation with PCOS. METHODS Six-weeks-old female specific pathogen-free rats (n = 60) were divided into blank control, PCOS model, and metformin groups (n = 20/group). After 21 days of metformin intervention, the serum sex hormones, fasting blood glucose, fasting insulin, and insulin resistance (IR) of rats in each group were measured. The mRNA levels of ANGPTL2, Foxol, and Akt in the ovarian tissues were monitored by real-time fluorescence quantitative PCR. RESULTS Compared with the control group, the levels of serum sex hormones, fasting blood glucose, fasting insulin, and IR in the model group showed significant increases, and the levels of ANGPTL2, Foxol, and Akt in the ovarian tissue also showed significant increases. Compared with the PCOS group, the serum sex hormones, fasting blood glucose, fasting insulin, and IR of rats in the metformin group were significantly decreased, and the levels of ANGPTL2, Foxol, and Akt in ovarian tissues also showed significant decreases. CONCLUSIONS These findings suggest that ANGPTL2 might participate in the development of PCOS through the PI3K/Akt signaling pathway. Metformin improves IR by reducing the expression of ANGPTL2, thus improving the endocrine environment of PCOS and might change the disease outcome.
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Affiliation(s)
- Dandan Wang
- Reproduction Center, The Third Affiliated Hospital of Henan University of Traditional Chinese Medicine, Zhengzhou, Henan, China
| | - Yihong Guo
- Reproductive and Genetic Hospital, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China.
| | - Shujuan Chai
- Reproduction Center, The Third Affiliated Hospital of Henan University of Traditional Chinese Medicine, Zhengzhou, Henan, China
| | - Ke Shen
- Reproduction Center, The Third Affiliated Hospital of Henan University of Traditional Chinese Medicine, Zhengzhou, Henan, China
| | - Yanchun Li
- Reproduction Center, The Third Affiliated Hospital of Henan University of Traditional Chinese Medicine, Zhengzhou, Henan, China
| | - Ruiqin Zhao
- Reproduction Center, The Third Affiliated Hospital of Henan University of Traditional Chinese Medicine, Zhengzhou, Henan, China
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15
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Tang C, Chen E, Peng K, Wang H, Cheng X, Wang Y, Yu S, Yu Y, Cui Y, Liu T. Mining the role of angiopoietin-like protein family in gastric cancer and seeking potential therapeutic targets by integrative bioinformatics analysis. Cancer Med 2020; 9:4850-4863. [PMID: 32410376 PMCID: PMC7333835 DOI: 10.1002/cam4.3100] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [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] [Subscribe] [Scholar Register] [Received: 04/23/2019] [Revised: 11/24/2019] [Accepted: 04/16/2020] [Indexed: 12/22/2022] Open
Abstract
Background The indistinctive effects of antiangiogenesis agents in gastric cancer (GC) can be attributed to multifaceted gene dysregulation associated with angiogenesis. Angiopoietin‐like (ANGPTL) proteins are secreted proteins regulating angiogenesis. They are also involved in inflammation and metabolism. Emerging evidences have revealed their various roles in carcinogenesis and metastasis development. However, the mRNA expression profiles, prognostic values, and biological functions of ANGPTL proteins in GC are still elucidated. Methods We compared the transcriptional expression levels of ANGPTL proteins between GC and normal gastric tissues using ONCOMINE and TCGA‐STAD. The prognostic values were evaluated by LinkedOmics and Kaplan–Meier Plotter, while the association of expression levels with clinicopathological features was generated through cBioPortal. We conducted the functional enrichment analysis with Metascape. Results The expression of ANGPTL1/3/6 was lower in GC tissues than in normal gastric tissues. High expression of ANGPTL1/2/4 was correlated with short overall survival and post‐progression survival in GC patients. Upregulated ANGPTL1/2 was correlated with higher histological grade, non‐intestinal Lauren classification, and advanced T stage, while ANGPTL4 exhibited high expression in early T stage, M1 stage, and non‐intestinal Lauren classification. Conclusions Integrative bioinformatics analysis suggests that ANGPTL1/2/4 may be potential therapeutic targets in GC patients. Among them, ANGPTL2 acts as a GC promoter, while ANGPTL1/4’s role in GC is still uncertain.
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Affiliation(s)
- Cheng Tang
- Department of Medical OncologyZhongshan Hospital Affiliated to Fudan UniversityShanghaiPR China
| | - Erbao Chen
- Department of Medical OncologyZhongshan Hospital Affiliated to Fudan UniversityShanghaiPR China
| | - Ke Peng
- Department of Medical OncologyZhongshan Hospital Affiliated to Fudan UniversityShanghaiPR China
| | - Haiwei Wang
- Department of Medical OncologyZhongshan Hospital Affiliated to Fudan UniversityShanghaiPR China
| | - Xi Cheng
- Department of Medical OncologyZhongshan Hospital Affiliated to Fudan UniversityShanghaiPR China
| | - Yan Wang
- Department of Medical OncologyZhongshan Hospital Affiliated to Fudan UniversityShanghaiPR China
| | - Shan Yu
- Department of Medical OncologyZhongshan Hospital Affiliated to Fudan UniversityShanghaiPR China
| | - Yiyi Yu
- Department of Medical OncologyZhongshan Hospital Affiliated to Fudan UniversityShanghaiPR China
| | - Yuehong Cui
- Department of Medical OncologyZhongshan Hospital Affiliated to Fudan UniversityShanghaiPR China
| | - Tianshu Liu
- Department of Medical OncologyZhongshan Hospital Affiliated to Fudan UniversityShanghaiPR China
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16
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Kira S, Abe I, Ishii Y, Miyoshi M, Oniki T, Arakane M, Daa T, Teshima Y, Yufu K, Shimada T, Takahashi N. Role of angiopoietin-like protein 2 in atrial fibrosis induced by human epicardial adipose tissue: Analysis using an organo-culture system. Heart Rhythm 2020; 17:1591-1601. [PMID: 32330625 DOI: 10.1016/j.hrthm.2020.04.027] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/18/2019] [Revised: 04/02/2020] [Accepted: 04/12/2020] [Indexed: 11/17/2022]
Abstract
BACKGROUND We have recently reported that peri-left atrial epicardial adipose tissue (EAT) is associated with atrial myocardial fibrosis, in which angiopoietin-like protein 2 (Angptl2) protein content in EAT is associated with atrial myocardial fibrosis. OBJECTIVE This study aimed to examine whether Angptl2 contained in peri-left atrial EAT can induce atrial myocardial fibrosis. METHODS Human peri-left atrial EAT and abdominal subcutaneous adipose tissue (SAT) were collected from 9 autopsy cases. EAT- or SAT-conditioned medium was dropped onto the rat left atrial epicardial surface using an organo-culture system. Conditioned medium, recombinant Angptl2, and its antibody effects on organo-cultured rat atrial myocardial fibrosis were evaluated. Angptl2 effects on cultured neonatal rat fibroblasts were also investigated. RESULTS EAT-conditioned medium induced atrial fibrosis in organo-cultured rat atrium with a progressive increase in the number of myofibroblasts. The profibrotic effect of EAT was greater than that of SAT. EAT in patients with atrial fibrillation induced a more significant atrial fibrosis than in those without. Treatment with human recombinant Angptl2 induced fibrosis in organo-cultured rat atrium, which was suppressed by the concomitant treatment with Angptl2 antibody. In cultured fibroblasts, Angptl2 upregulated the expression of α-smooth muscle actin, transforming growth factor-β1, phospho-extracellular signal-regulated kinase,phospho-inhibitor of κBα, and phospho-p38 mitogen-activated protein kinase. CONCLUSION This study demonstrated that Angptl2 contained in EAT played a crucial role in EAT-induced inflammatory atrial fibrosis. The results also suggested that antagonizing the expression of Angptl2 in EAT can be a novel therapeutic approach to prevent atrial fibrillation.
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Affiliation(s)
- Shintaro Kira
- Department of Cardiology and Clinical Examination, Oita University Faculty of Medicine, Oita, Japan
| | - Ichitaro Abe
- Department of Cardiology and Clinical Examination, Oita University Faculty of Medicine, Oita, Japan.
| | - Yumi Ishii
- Department of Cardiology and Clinical Examination, Oita University Faculty of Medicine, Oita, Japan
| | - Miho Miyoshi
- Department of Cardiology and Clinical Examination, Oita University Faculty of Medicine, Oita, Japan
| | - Takahiro Oniki
- Department of Cardiology and Clinical Examination, Oita University Faculty of Medicine, Oita, Japan
| | - Motoki Arakane
- Department of Diagnostic Pathology, Oita University Faculty of Medicine, Oita, Japan
| | - Tsutomu Daa
- Department of Diagnostic Pathology, Oita University Faculty of Medicine, Oita, Japan
| | - Yasushi Teshima
- Department of Cardiology and Clinical Examination, Oita University Faculty of Medicine, Oita, Japan
| | - Kunio Yufu
- Department of Cardiology and Clinical Examination, Oita University Faculty of Medicine, Oita, Japan
| | - Tatsuo Shimada
- Oita Medical Technology School, Japan College of Judo-Therapy Acupuncture & Moxibustion Therapy, Oita, Japan
| | - Naohiko Takahashi
- Department of Cardiology and Clinical Examination, Oita University Faculty of Medicine, Oita, Japan.
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17
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El-Lebedy D. Association of serum angiopoietin-like protein 2 with elevated risk of cardiovascular diseases in subjects with type 2 diabetes. J Diabetes Complications 2019; 33:107421. [PMID: 31484627 DOI: 10.1016/j.jdiacomp.2019.107421] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/29/2019] [Accepted: 08/17/2019] [Indexed: 12/12/2022]
Abstract
AIMS Although previous data have suggested ANGPTL2 and ANGPTL8 (betatrophin) to be related to atherosclerosis in humans, little is known whether this applies in patients with type 2 diabetes (T2D). In this work, we investigate association of serum ANGPTL2 and betatrophin with the risk of cardiovascular diseases (CVD) in T2D patients. METHODS We measured serum levels of ANGPTL2 and betatrophin in 150 T2D patients with and without CVD and in 100 control subjects. RESULTS Serum ANGPTL2 was significantly higher in T2D patients than in controls (p < 0.0001), and in T2D + CVD patients than T2D only patients (p = 0.0002). Serum betatrophin was lower in T2D patients than in controls but with no statistical significance (p = 0.07). Elevated serum ANGPTL2 associated with 2.83-fold increased risk of T2D and with 1.18-fold elevated risk of CVD among T2D patients with positive correlations with markers of hyperglycemia, insulin resistance and atherogenic lipid profile. ROC curve indicated ANGPTL2 as risk biomarker for T2D and CVD with sensitivity of 92.2% and 86%; and specificity of 86.7% and 58%; respectively. CONCLUSION We indicate for the first time serum ANGPTL2 as an independent risk biomarker for CVD in T2D patients. Future studies are needed to reveal its role in disease pathogenesis.
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Affiliation(s)
- Dalia El-Lebedy
- Department of Clinical and Chemical Pathology, Medical Research Division, National Research Center, Cairo, Egypt.
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18
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Shan W, Cheng C, Huang W, Ding Z, Luo S, Cui G, Lu W, Liu F, Xu J, He W, Yin Z. Angiopoietin-like 2 upregulation promotes human chondrocyte injury via NF-κB and p38/MAPK signaling pathway. J Bone Miner Metab 2019; 37:976-986. [PMID: 31214838 DOI: 10.1007/s00774-019-01016-w] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/28/2019] [Accepted: 06/03/2019] [Indexed: 01/15/2023]
Abstract
Several cellular and molecular processes participate in the pathologic changes of osteoarthritis (OA). However, the core molecular regulators of these processes are unclear, and no effective treatment for OA disease has been developed so far. ANGPTL2 is well known for its tissue remolding and pro-inflammation properties. However, the role of ANGPTL2 in osteoarthritis (OA) still remains unclear. To explore the expression level of ANGPTL2 in human OA cartilage and investigate the function of ANGPTL2 in human chondrocytes injury, qRT-PCR, western blot and immunohistochemistry were employed to investigate the expression of ANGPTL2 between human OA and normal cartilage samples. Next, human primary chondrocytes were treated with IL-1β to mimic OA progress in vitro, and the expression of ANGPTL2 were tested by qRT-PCR and western blot. Furthermore, the effect of ANGPTL2 in the expression of pro-inflammation cytokines (IL-1β, IL-6), proteolytic enzymes (MMP-1, MMP-13) and component of the cartilage matrix (COL2A1 and aggrecan) in human primary chondrocyte were explored by gain-of-function and loss-of-function methods. Finally, the nuclear factor kappa B (NF-κB) and p38/MAPK signaling pathways were also tested by western blot analysis. In this study, firstly, the expression level of ANGPTL2 was elevated both in human OA cartilage samples and IL-1β stimulated human chondrocytes. Secondly, ANGPTL2 upregulation promotes extracellular matrix (ECM) degradation and inflammation mediator production in human chondrocytes. Finally, ANGPTL2 activated the NF-κB and p38/MAPK signaling pathways via integrin α5β1. This study, for the first time, highlights that ANGPTL2 secreted by human chondrocytes plays a negative role in the pathogenesis of osteoarthritis, and it may be a potential therapeutic target in OA.
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Affiliation(s)
- Wenshan Shan
- Department of Orthopaedics, The First Affiliated Hospital of Anhui Medical University, 218#Ji Xi Road, Hefei, 230032, Anhui, China
| | - Chao Cheng
- Department of Orthopaedics, The Fourth Affiliated Hospital of Anhui Medical University, 372#Tun Xi Road, Hefei, 230032, Anhui, China
| | - Wei Huang
- Department of Orthopaedics, The First Affiliated Hospital of Anhui Medical University, 218#Ji Xi Road, Hefei, 230032, Anhui, China
- Division of Life Sciences and Medicine, Department of Orthopaedics, The First Affiliated Hospital of USTC, University of Science and Technology of China, 17#Lu Jiang Road, Hefei, 230001, Anhui, China
| | - Zhenfei Ding
- Department of Orthopaedics, The First Affiliated Hospital of Anhui Medical University, 218#Ji Xi Road, Hefei, 230032, Anhui, China
| | - Sha Luo
- School of Basic Medical Science, and the First Clinical Medical College, Anhui Medical University, 81# Mei Shan Road, Hefei, 230032, Anhui, China
| | - Guanjun Cui
- Department of Orthopaedics, The First Affiliated Hospital of Anhui Medical University, 218#Ji Xi Road, Hefei, 230032, Anhui, China
| | - Wei Lu
- Department of Orthopaedics, The First Affiliated Hospital of Anhui Medical University, 218#Ji Xi Road, Hefei, 230032, Anhui, China
| | - Fuen Liu
- Department of Orthopaedics, The First Affiliated Hospital of Anhui Medical University, 218#Ji Xi Road, Hefei, 230032, Anhui, China
| | - JieGou Xu
- School of Basic Medical Science, and the First Clinical Medical College, Anhui Medical University, 81# Mei Shan Road, Hefei, 230032, Anhui, China.
| | - Wei He
- School of Basic Medical Science, and the First Clinical Medical College, Anhui Medical University, 81# Mei Shan Road, Hefei, 230032, Anhui, China.
| | - Zongsheng Yin
- Department of Orthopaedics, The First Affiliated Hospital of Anhui Medical University, 218#Ji Xi Road, Hefei, 230032, Anhui, China.
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Bolger-Munro M, Choi K, Scurll JM, Abraham L, Chappell RS, Sheen D, Dang-Lawson M, Wu X, Priatel JJ, Coombs D, Hammer JA, Gold MR. Arp2/3 complex-driven spatial patterning of the BCR enhances immune synapse formation, BCR signaling and B cell activation. eLife 2019; 8:e44574. [PMID: 31157616 PMCID: PMC6591008 DOI: 10.7554/elife.44574] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2018] [Accepted: 06/01/2019] [Indexed: 12/17/2022] Open
Abstract
When B cells encounter antigens on the surface of an antigen-presenting cell (APC), B cell receptors (BCRs) are gathered into microclusters that recruit signaling enzymes. These microclusters then move centripetally and coalesce into the central supramolecular activation cluster of an immune synapse. The mechanisms controlling BCR organization during immune synapse formation, and how this impacts BCR signaling, are not fully understood. We show that this coalescence of BCR microclusters depends on the actin-related protein 2/3 (Arp2/3) complex, which nucleates branched actin networks. Moreover, in murine B cells, this dynamic spatial reorganization of BCR microclusters amplifies proximal BCR signaling reactions and enhances the ability of membrane-associated antigens to induce transcriptional responses and proliferation. Our finding that Arp2/3 complex activity is important for B cell responses to spatially restricted membrane-bound antigens, but not for soluble antigens, highlights a critical role for Arp2/3 complex-dependent actin remodeling in B cell responses to APC-bound antigens.
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Affiliation(s)
- Madison Bolger-Munro
- Department of Microbiology and ImmunologyUniversity of British ColumbiaVancouverCanada
- Life Sciences Institute, I3 Research GroupUniversity of British ColumbiaVancouverCanada
| | - Kate Choi
- Department of Microbiology and ImmunologyUniversity of British ColumbiaVancouverCanada
- Life Sciences Institute, I3 Research GroupUniversity of British ColumbiaVancouverCanada
| | - Joshua M Scurll
- Department of Mathematics, Institute of Applied MathematicsUniversity of British ColumbiaVancouverCanada
| | - Libin Abraham
- Department of Microbiology and ImmunologyUniversity of British ColumbiaVancouverCanada
- Life Sciences Institute, I3 Research GroupUniversity of British ColumbiaVancouverCanada
- Department of Mathematics, Institute of Applied MathematicsUniversity of British ColumbiaVancouverCanada
| | - Rhys S Chappell
- Department of Mathematics, Institute of Applied MathematicsUniversity of British ColumbiaVancouverCanada
| | - Duke Sheen
- Department of Microbiology and ImmunologyUniversity of British ColumbiaVancouverCanada
- Life Sciences Institute, I3 Research GroupUniversity of British ColumbiaVancouverCanada
| | - May Dang-Lawson
- Department of Microbiology and ImmunologyUniversity of British ColumbiaVancouverCanada
- Life Sciences Institute, I3 Research GroupUniversity of British ColumbiaVancouverCanada
| | - Xufeng Wu
- Cell Biology and Physiology CenterNational Heart, Lung and Blood Institute, National Institutes of HealthBethesdaUnited States
| | - John J Priatel
- Department of Pathology and Laboratory MedicineUniversity of British ColumbiaVancouverCanada
- BC Children’s Hospital Research InstituteVancouverCanada
| | - Daniel Coombs
- Department of Mathematics, Institute of Applied MathematicsUniversity of British ColumbiaVancouverCanada
| | - John A Hammer
- Cell Biology and Physiology CenterNational Heart, Lung and Blood Institute, National Institutes of HealthBethesdaUnited States
| | - Michael R Gold
- Department of Microbiology and ImmunologyUniversity of British ColumbiaVancouverCanada
- Life Sciences Institute, I3 Research GroupUniversity of British ColumbiaVancouverCanada
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Abstract
Obesity has reached epidemic proportions and its prevalence is climbing. Obesity is characterized by hypertrophied adipocytes with a dysregulated adipokine secretion profile, increased recruitment of inflammatory cells, and impaired metabolic homeostasis that eventually results in the development of systemic insulin resistance, a phenotype of type 2 diabetes. Nitric oxide synthase (NOS) is an enzyme that converts L-arginine to nitric oxide (NO), which functions to maintain vascular and adipocyte homeostasis. Arginase is a ureohydrolase enzyme that competes with NOS for L-arginine. Arginase activity/expression is upregulated in obesity, which results in diminished bioavailability of NO, impairing both adipocyte and vascular endothelial cell function. Given the emerging role of NO in the regulation of adipocyte physiology and metabolic capacity, this review explores the interplay between arginase and NO, and their effect on the development of metabolic disorders, cardiovascular diseases, and mitochondrial dysfunction in obesity. A comprehensive understanding of the mechanisms involved in the development of obesity-induced metabolic and vascular dysfunction is necessary for the identification of more effective and tailored therapeutic avenues for their prevention and treatment.
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Affiliation(s)
- Reem T Atawia
- Department of Pharmacology and Toxicology, Medical College of Georgia, Augusta University. Augusta, GA 30904, USA
| | - Katharine L Bunch
- Department of Pharmacology and Toxicology, Medical College of Georgia, Augusta University. Augusta, GA 30904, USA
| | - Haroldo A Toque
- Department of Pharmacology and Toxicology,and Vascular Biology Center, Medical College of Georgia, Augusta University. Augusta, GA 30904, USA
| | - Ruth B Caldwell
- Vascular Biology Center, Medical College of Georgia, Augusta University. Augusta, GA 30904, USA
| | - Robert W Caldwell
- Vascular Biology Center, Medical College of Georgia, Augusta University. Augusta, GA 30904,USA,
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Satou G, Maji D, Isamoto T, Oike Y, Endo M. UV-B-activated B16 melanoma cells or HaCaT keratinocytes accelerate signaling pathways associated with melanogenesis via ANGPTL 2 induction, an activity antagonized by Chrysanthemum extract. Exp Dermatol 2019; 28:152-160. [PMID: 30554436 PMCID: PMC6850386 DOI: 10.1111/exd.13862] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2018] [Revised: 12/04/2018] [Accepted: 12/07/2018] [Indexed: 01/30/2023]
Abstract
Sunburn causes inflammation, which increases melanin production in skin and causes hyperpigmentation. Angiopoietin-like protein (ANGPTL) 2 is an inflammatory mediator induced in sun-exposed skin areas. However, whether ANGPTL2 functions in melanin production remains unclear. To assess this possibility, we overexpressed Angptl2 in the melanoma line B16 and in the keratinocyte line HaCaT. Relative to controls, Angptl2-expressing B16 cells produced higher melanin levels via tyrosinase induction. Accordingly, Angptl2-expressing HaCaT cells secreted relatively high levels of both endothelin-1 (ET-1) and α-melanocyte-stimulating hormone (α-MSH). Moreover, treatment with an extract from Chrysanthemum indicum × Erigeron annuus (CE) suppressed ANGPTL2 expression and repressed tyrosinase induction in melanocytes and of α-MSH and ET-1 in keratinocytes. Our data suggest that ANGPTL2 expression in keratinocytes and melanin-producing cells accelerates pigment production and that treatment of skin with a CE extract could prevent melanin accumulation.
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Affiliation(s)
- Gaku Satou
- Saishunkan Pharmaceutical Co. Ltd, Kumamoto, Japan
| | - Daisuke Maji
- Saishunkan Pharmaceutical Co. Ltd, Kumamoto, Japan
| | | | - Yuichi Oike
- Department of Molecular Genetics, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - Motoyoshi Endo
- Department of Molecular Genetics, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
- Department of Molecular Biology, University of Occupational and Environmental Health, Japan, Fukuoka, Japan
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Noly PE, Labbé P, Thorin-Trescases N, Fortier A, Nguyen A, Thorin E, Carrier M. Reduction of plasma angiopoietin-like 2 after cardiac surgery is related to tissue inflammation and senescence status of patients. J Thorac Cardiovasc Surg 2019; 158:792-802.e5. [PMID: 30745045 DOI: 10.1016/j.jtcvs.2018.12.047] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/17/2018] [Revised: 12/04/2018] [Accepted: 12/15/2018] [Indexed: 12/17/2022]
Abstract
OBJECTIVES A strong relationship between high circulating angiopoietin-like 2 (ANGPTL2) levels, a proinflammatory adipokine, and cardiovascular diseases has been reported. Our objective was to determine whether plasma ANGPTL2 and high-sensitivity C-reactive protein (hs-CRP) levels change postoperatively in patients who underwent heart valve surgery and/or coronary artery bypass grafting. We hypothesized that a corrective cardiac surgery would decrease ANGPTL2 levels. METHODS In 47 prospectively recruited patients who underwent coronary artery bypass grafting (n = 16), valve replacement (n = 16), or both (n = 15), we measured plasma ANGPTL2 and hs-CRP levels preoperatively, at 24 hours, at 3 to 5 days (hospital discharge), and at 30 to 90 days (follow-up) after surgery. Mediastinal adipose tissue and distal fragments of the left internal mammary artery (IMA) were harvested during surgery and mRNA expression of inflammatory and senescence markers was assessed using real-time quantitative polymerase chain reaction. RESULTS ANGPTL2 and hs-CRP levels were elevated 24 hours after surgery and then returned to baseline levels. We noted, however, a dichotomy among patients: compared with baseline, plasma ANGPTL2 levels either significantly decreased (n = 21/47) or increased (n = 26/47) after surgery. In contrast, hs-CRP levels were identical between groups (P = .997). Patients in the increased group were older (P = .002) with a higher systolic blood pressure (P = .038) at baseline. Moreover, changes in ANGPTL2 levels (ΔANGPTL2 = final minus initial levels) positively correlated with mRNA expression of tumor necrosis factor α and interleukin 8 in mediastinal adipose tissue and IMA (P < .05) and with the senescence-associated marker cyclin-dependent kinase inhibitor 1 in IMA (P = .009). CONCLUSIONS In younger patients with lower levels of tissue inflammation and arterial senescence load, ANGPTL2, but not hs-CRP levels decreased after cardiac surgery, suggesting that circulating ANGPTL2 reflects tissue inflammation and senescence.
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Affiliation(s)
- Pierre-Emmanuel Noly
- Faculty of Medicine, Department of Surgery, Montreal Heart Institute, Université de Montréal, Montreal, Quebec, Canada
| | - Pauline Labbé
- Montreal Heart Institute Research Center, Université de Montréal, Montreal, Quebec, Canada; Department of Pharmacology, Université de Montréal, Montreal, Quebec, Canada
| | | | - Annik Fortier
- Montreal Health Innovations Coordinating Center, Montreal, Quebec, Canada
| | - Albert Nguyen
- Montreal Heart Institute Research Center, Université de Montréal, Montreal, Quebec, Canada
| | - Eric Thorin
- Faculty of Medicine, Department of Surgery, Montreal Heart Institute, Université de Montréal, Montreal, Quebec, Canada.
| | - Michel Carrier
- Faculty of Medicine, Department of Surgery, Montreal Heart Institute, Université de Montréal, Montreal, Quebec, Canada
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Ishii T, Furuya F, Takahashi K, Shikata M, Takamura T, Kobayashi H, Miyazaki A, Morinaga J, Terada K, Oike Y, Kanda E, Kitamura K. Angiopoietin-Like Protein 2 Promotes the Progression of Diabetic Kidney Disease. J Clin Endocrinol Metab 2019; 104:172-180. [PMID: 30137449 DOI: 10.1210/jc.2017-02705] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/13/2017] [Accepted: 08/14/2018] [Indexed: 12/18/2022]
Abstract
CONTEXT Angiopoietin-like protein 2 (ANGPTL2) is a circulating, proinflammatory protein. OBJECTIVE To examine the role of ANGPTL2 in the pathogenesis of diabetic kidney disease (DKD), we studied the epigenetic regulation of angptl2 expression in patients with diabetes. DESIGN, SETTING, PARTICIPANTS, AND INTERVENTION We determined the relationship between serum ANGPTL2 levels and the progression of DKD in cross-sectional (220 patients) and cohort (145 patients, 7-year follow-up) studies. Furthermore, we investigated the direct effect of ANGPTL2 on podocyte function. MAIN OUTCOMES The main outcome was progression of DKD. RESULTS We found that the expression of angptl2 was decreased by the methylation of its promoter region. Multivariate logistic regression analyses revealed that the baseline level of serum ANGPTL2 was an independent risk factor for the progression of DKD during follow-up periods. In cultured podocytes, ANGPTL2 directly increased albumin permeability through the translocation of zonula occludens-1 from the membrane to the cytosol via activation of focal adhesion kinase. CONCLUSIONS ANGPTL2 might be directly involved in podocyte dysfunction and independently associated with the progression of DKD stages.
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Affiliation(s)
- Toshihisa Ishii
- Third Department of Internal Medicine, Interdisciplinary Graduate School of Medicine and Engineering, University of Yamanashi, Chuo, Yamanashi, Japan
| | - Fumihiko Furuya
- Third Department of Internal Medicine, Interdisciplinary Graduate School of Medicine and Engineering, University of Yamanashi, Chuo, Yamanashi, Japan
| | - Kazuya Takahashi
- Third Department of Internal Medicine, Interdisciplinary Graduate School of Medicine and Engineering, University of Yamanashi, Chuo, Yamanashi, Japan
| | - Miho Shikata
- Third Department of Internal Medicine, Interdisciplinary Graduate School of Medicine and Engineering, University of Yamanashi, Chuo, Yamanashi, Japan
| | - Takeyuki Takamura
- Third Department of Internal Medicine, Interdisciplinary Graduate School of Medicine and Engineering, University of Yamanashi, Chuo, Yamanashi, Japan
| | - Hidetoshi Kobayashi
- Third Department of Internal Medicine, Interdisciplinary Graduate School of Medicine and Engineering, University of Yamanashi, Chuo, Yamanashi, Japan
| | - Asako Miyazaki
- Kua-hause Isawa, Isawa Onsen Hospital, Fuefuki, Yamanashi, Japan
| | - Jun Morinaga
- Department of Molecular Genetics, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - Kazutoyo Terada
- Department of Molecular Genetics, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - Yuichi Oike
- Department of Molecular Genetics, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - Eiichiro Kanda
- Department of Nephrology and Hypertension, Kawasaki Medical School, Okayama, Japan
| | - Kenichiro Kitamura
- Third Department of Internal Medicine, Interdisciplinary Graduate School of Medicine and Engineering, University of Yamanashi, Chuo, Yamanashi, Japan
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Xiao HB, Sui GG, Lu XY, Sun ZL. Kaempferol modulates Angiopoietin-like protein 2 expression to lessen the mastitis in mice. Pharmacol Rep 2017; 70:439-445. [PMID: 29627690 DOI: 10.1016/j.pharep.2017.11.006] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [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] [Received: 03/17/2017] [Revised: 11/05/2017] [Accepted: 11/20/2017] [Indexed: 12/22/2022]
Abstract
BACKGROUND Mastitis is inflammation of a breast (or udder). Angiopoietin-like protein 2 (ANGPTL2) has been found as a key inflammatory mediator in mastitis. Purpose of this research was to investigate the mechanisms about repressing effect of kaempferol on mastitis. METHODS Forty mice were randomly divided into 4 groups (n=10): C57BL/6J control mice, untreated murine mastitis, 10mg/kg kaempferol treated murine mastitis (ip), and 30mg/kg kaempferol treated murine mastitis (ip). Primary cultured mouse mammary epithelial cells (MMEC) were indiscriminately divided into seven groups including control group, 10mmol/L vehicle of kaempferol group, 10μmol/L kaempferol treated group, 20μg/mL LPS treated group, 1μmol/L kaempferol plus LPS treated group, 3μmol/L kaempferol plus LPS treated group, and 10μmol/L kaempferol plus LPS treated group. RESULTS In murine mastitis, kaempferol (10 or 30mg/kg) treatment prevented mastitis development, decreased myeloperoxidase (MPO) production, interleukin (IL)-6 level, tumour necrosis factor-α (TNF-α) concentration, and ANGPTL2 expression. In MMEC, kaempferol (1, 3 or 10μM) reduced MPO production, TNF-α concentration, IL-6 level, and ANGPTL2 expression. CONCLUSIONS The results in present study show that kaempferol modulates the expression of ANGPTL2 to lessen the mastitis in mice.
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Affiliation(s)
- Hong-Bo Xiao
- College of Veterinary Medicine, Hunan Agricultural University, Changsha, China.
| | - Guo-Guang Sui
- College of Veterinary Medicine, Hunan Agricultural University, Changsha, China
| | - Xiang-Yang Lu
- Hunan Province University Key Laboratory for Agricultural Biochemistry and Biotransformation, Hunan Agricultural University, Changsha, China; Hunan Co-Innovation Center for Ultilization of Botanical Functional Ingredients, Changsha, China
| | - Zhi-Liang Sun
- Biological Veterinary Drugs Branch, National Research Center of Engineering and Technology for Utilization of Botanical Functional Ingredients, Hunan Agricultural University, Changsha, China
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Ohno T, Yamamoto G, Hayashi JI, Nishida E, Goto H, Sasaki Y, Kikuchi T, Fukuda M, Hasegawa Y, Mogi M, Mitani A. Angiopoietin-like protein 2 regulates Porphyromonas gingivalis lipopolysaccharide-induced inflammatory response in human gingival epithelial cells. PLoS One 2017; 12:e0184825. [PMID: 28934245 PMCID: PMC5608282 DOI: 10.1371/journal.pone.0184825] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [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: 04/27/2017] [Accepted: 08/31/2017] [Indexed: 11/27/2022] Open
Abstract
Angiopoietin-like protein 2 (ANGPTL2) maintains tissue homeostasis by inducing inflammation and angiogenesis. It is produced in infiltrating immune cells or resident cells, such as adipocytes, vascular endothelial cells, and tumor cells. We hypothesized that ANGPTL2 might play an important role as a unique mediator in both systemic and periodontal disease. We demonstrated an increased ANGPTL2 concentration in gingival crevicular fluid from chronic periodontitis patients. Porphyromonas gingivalis lipopolysaccharide (LPS) treatment strongly induced ANGPTL2 mRNA and protein levels in Ca9-22 human gingival epithelial cells. Recombinant human ANGPTL2 increased interleukin 1β (IL-1β), IL-8, and tumor necrosis factor-α (TNF-α) mRNA and protein levels in Ca9-22 cells. Small-interfering (si)RNA-mediated ANGPTL2 knockdown in Ca9-22 cells reduced IL-1β, IL-8 and TNF-α mRNA and protein levels compared with control siRNA (p<0.01) in P. gingivalis LPS-stimulated Ca9-22 cells. Antibodies against integrin α5β1, an ANGPTL receptor, blocked induction of these inflammatory cytokines in P. gingivalis LPS-treated Ca9-22 cells, suggesting that secreted ANGPTL induces inflammatory cytokines in gingival epithelial cells via an autocrine loop. The classic sequential cascade of P. gingivalis LPS → inflammatory cytokine induction is well established. However, in the current study, we reveal a novel cascade comprising sequential P. gingivalis LPS → ANGPTL2 → integrin α5β1 → inflammatory cytokine induction, which might be responsible for inducing potent periodontal disorganization activity in gingival epithelial cells. Via this pathway, ANGPTL2 functions in the pathogenesis of periodontitis and contributes to prolonging chronic inflammation in patients with systemic disease.
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Affiliation(s)
- Tasuku Ohno
- Department of Periodontology, School of Dentistry, Aichi Gakuin University, Chikusa-ku, Nagoya, Aichi, Japan
| | - Genta Yamamoto
- Department of Periodontology, School of Dentistry, Aichi Gakuin University, Chikusa-ku, Nagoya, Aichi, Japan
- * E-mail:
| | - Jun-ichiro Hayashi
- Department of Periodontology, School of Dentistry, Aichi Gakuin University, Chikusa-ku, Nagoya, Aichi, Japan
| | - Eisaku Nishida
- Department of Periodontology, School of Dentistry, Aichi Gakuin University, Chikusa-ku, Nagoya, Aichi, Japan
| | - Hisashi Goto
- Department of Periodontology, School of Dentistry, Aichi Gakuin University, Chikusa-ku, Nagoya, Aichi, Japan
| | - Yasuyuki Sasaki
- Department of Periodontology, School of Dentistry, Aichi Gakuin University, Chikusa-ku, Nagoya, Aichi, Japan
| | - Takeshi Kikuchi
- Department of Periodontology, School of Dentistry, Aichi Gakuin University, Chikusa-ku, Nagoya, Aichi, Japan
| | - Mitsuo Fukuda
- Department of Periodontology, School of Dentistry, Aichi Gakuin University, Chikusa-ku, Nagoya, Aichi, Japan
| | - Yoshiaki Hasegawa
- Department of Microbiology, School of Dentistry, Aichi Gakuin University, Nagoya, Chikusa-ku, Aichi, Japan
| | - Makio Mogi
- Department of Integrative Education of Pharmacy, School of Pharmacy, Aichi Gakuin University, Chikusa-ku, Nagoya, Aichi, Japan
| | - Akio Mitani
- Department of Periodontology, School of Dentistry, Aichi Gakuin University, Chikusa-ku, Nagoya, Aichi, Japan
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Desjardins MP, Thorin-Trescases N, Sidibé A, Fortier C, De Serres SA, Larivière R, Thorin E, Agharazii M. Levels of Angiopoietin-Like-2 Are Positively Associated With Aortic Stiffness and Mortality After Kidney Transplantation. Am J Hypertens 2017; 30:409-416. [PMID: 28158589 DOI: 10.1093/ajh/hpw208] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [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] [Received: 09/24/2016] [Accepted: 01/05/2017] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND Angiopoietin-like-2 (ANGPTL2) is a secreted proinflammatory glycoprotein that promotes endothelial dysfunction, atherosclerosis, and cardiovascular disease (CVD). Circulating ANGPTL2 is increased in chronic kidney disease (CKD), where the risk of CVD is amplified. The objectives of the present study were to (i) examine whether kidney transplantation (KTx) reduces ANGPTL2 levels, (ii) identify the determinants of ANGPTL2 after KTx, (iii) study the association of ANGPTL2 with aortic stiffness, and (iv) assess the impact of ANGPTL2 on mortality after KTx. METHODS In 75 patients, serum ANGPTL2 levels were measured at baseline and 3 months after KTx. Aortic stiffness was determined by carotid-femoral pulse wave velocity, glomerular filtration rate was estimated by CKD-EPI formula, and serum cytokines and endothlin-1 levels were determined 3 months after KTx. Survival analysis was performed using Kaplan-Meier and Cox regression after a median follow-up of 90 months. RESULTS After 3 months of KTx, ANGPTL2 levels decreased from 71 ng/ml (53-95) to 11 ng/ml (9-15) (P < 0.001). In multivariate analysis, age, lower renal function, and endothelin-1 were independently associated with higher post-KTx ANGPTL2 levels. ANGPTL2 was positively associated with aortic stiffness after KTx, even when adjusted for mean blood pressure (standardized β = 0.314; P = 0.008). During follow-up, 13 deaths occurred. The group of patients with higher post-KTx ANGPTL2 levels had a hazard ratio for mortality of 3.9 (95% confidence interval: 1.07-14.4; P = 0.039). CONCLUSION KTx significantly reduced serum ANGPTL2 levels. The positive association between post-KTx ANGPTL2, aortic stiffness and mortality, suggests that ANGPTL2 may play a biological role in CKD-related CVD.
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Affiliation(s)
- Marie-Pier Desjardins
- CHU de Québec Research Center, L'Hôtel-Dieu de Québec hospital, Division of Nephrology, Department of medicine, Faculty of medicine, Université Laval, Québec City, Québec, Canada
| | | | - Aboubacar Sidibé
- CHU de Québec Research Center, L'Hôtel-Dieu de Québec hospital, Division of Nephrology, Department of medicine, Faculty of medicine, Université Laval, Québec City, Québec, Canada
| | - Catherine Fortier
- CHU de Québec Research Center, L'Hôtel-Dieu de Québec hospital, Division of Nephrology, Department of medicine, Faculty of medicine, Université Laval, Québec City, Québec, Canada
| | - Sacha A De Serres
- CHU de Québec Research Center, L'Hôtel-Dieu de Québec hospital, Division of Nephrology, Department of medicine, Faculty of medicine, Université Laval, Québec City, Québec, Canada
| | - Richard Larivière
- CHU de Québec Research Center, L'Hôtel-Dieu de Québec hospital, Division of Nephrology, Department of medicine, Faculty of medicine, Université Laval, Québec City, Québec, Canada
| | - Eric Thorin
- Université de Montréal, Montreal Heart Institute, Department of Surgery, Montréal, Québec, Canada
| | - Mohsen Agharazii
- CHU de Québec Research Center, L'Hôtel-Dieu de Québec hospital, Division of Nephrology, Department of medicine, Faculty of medicine, Université Laval, Québec City, Québec, Canada
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Takano A, Fukuda T, Shinjo T, Iwashita M, Matsuzaki E, Yamamichi K, Takeshita M, Sanui T, Nishimura F. Angiopoietin-like protein 2 is a positive regulator of osteoblast differentiation. Metabolism 2017; 69:157-170. [PMID: 28285646 DOI: 10.1016/j.metabol.2017.01.006] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/03/2016] [Revised: 12/13/2016] [Accepted: 01/08/2017] [Indexed: 11/28/2022]
Abstract
INTRODUCTION AND AIMS Several studies have reported that angiopoietin-like protein 2 (Angptl2) is expressed abundantly in adipocytes and is associated with adipose tissue inflammation. In the present study, we found that osteoblasts and mesenchymal stem cells also expressed Angptl2 at high levels. The aim of this study was to understand the role of Angptl2 in osteoblastic cell differentiation. METHODS Angptl2 expression was examined during osteoblast and adipocyte differentiation. The role of Angptl2 on cell differentiation and associated signaling was analyzed by gene knockdown using Angptl2 small interfering ribonucleic acid (siRNA). RESULTS Angptl2 was highly expressed in MC3T3-E1 cells, ST2 cells and primary osteoblasts, but not in RAW264 cells. Inhibition of Angptl2 expression using siRNA markedly inhibited alkaline phosphatase (ALP) expression and osteoblastic differentiation in MC3T3-E1, ST2 cells and primary osteoblasts. Angptl2 siRNA also inhibited adipocyte differentiation in ST2 cells. Treatment of MC3T3-E1 cells with Angptl2 siRNA led to the down-regulation of the activities of several cell signaling pathways, including extracellular signal-regulated kinase (ERK), Jun amino-terminal kinase (JNK), Akt, and nuclear factor kappa B (NF-κB) signals. It also down-regulated the expression of Osterix, but not that of runt-related transcription factor 2 (Runx2), suggesting that Angptl2 is a positive activator of Osterix and its down-stream signals. Treatment of MC3T3-E1 cells with anti-Angptl2 antibodies suppressed ALP gene expression. In addition, treatment of Angptl2 siRNA-treated cells with culture supernatants of normal MC3T3-E1 cells restored ALP gene expression, indicating that Angptl2 acts in an autocrine manner. CONCLUSIONS The results suggest that Angptl2 is an autocrine positive regulator of cell differentiation. Thus, it is suggested that Angptl2 regulates not only adipose tissue metabolism but also bone metabolism.
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Affiliation(s)
- Aiko Takano
- Department of Periodontology, Faculty of Dental Science, Kyushu University, Fukuoka, Japan
| | - Takao Fukuda
- Department of Periodontology, Faculty of Dental Science, Kyushu University, Fukuoka, Japan
| | - Takanori Shinjo
- Department of Periodontology, Faculty of Dental Science, Kyushu University, Fukuoka, Japan
| | - Misaki Iwashita
- Department of Periodontology, Faculty of Dental Science, Kyushu University, Fukuoka, Japan
| | - Etsuko Matsuzaki
- Department of Operative Dentistry and Endodontology, Fukuoka Dental College, Fukuoka, Japan
| | - Kensuke Yamamichi
- Department of Periodontology, Faculty of Dental Science, Kyushu University, Fukuoka, Japan
| | - Masaaki Takeshita
- Department of Periodontology, Faculty of Dental Science, Kyushu University, Fukuoka, Japan
| | - Terukazu Sanui
- Department of Periodontology, Faculty of Dental Science, Kyushu University, Fukuoka, Japan
| | - Fusanori Nishimura
- Department of Periodontology, Faculty of Dental Science, Kyushu University, Fukuoka, Japan.
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Sheng WZ, Chen YS, Tu CT, He J, Zhang B, Gao WD. ANGPTL2 expression in gastric cancer tissues and cells and its biological behavior. World J Gastroenterol 2016; 22:10364-10370. [PMID: 28058016 PMCID: PMC5175248 DOI: 10.3748/wjg.v22.i47.10364] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/05/2016] [Revised: 08/25/2016] [Accepted: 09/14/2016] [Indexed: 02/06/2023] Open
Abstract
AIM To explore expression of angiopoietin-like protein 2 (ANGPTL2) and its effect on biological behavior such as proliferation and invasiveness in gastric cancer.
METHODS Western blotting was used to detect expression of ANGPTL2 in 60 human normal gastric tissues, 60 human gastric cancer tissues and gastric cell lines including GES-1, N87, SGC7901, BGC823 and PAMC82. 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) and Transwell assay were used to detect the proliferation and invasive ability of gastric cancer cells.
RESULTS Compared to normal tissues, ANGPTL2 protein levels were significantly upregulated in gastric tissues, and this level was closely correlated with gastric tumor grade, clinical stage and lymph node metastasis. Compared to GES-1 cells, ANGPTL2 mRNA and protein levels were significantly increased in gastric cancer cells including N87, SGC7901, BGC823 and PAMC82. The expression of ANGPTL2 in highly malignant gastric cancer cell lines BGC823 and PAMC82 was significantly higher than in low malignancy gastric cancer cell lines N87 and SGC7901. MTT and Transwell experiments indicated that the proliferation rate and invasive ability of stable overexpressed gastric cancer cells was faster than in cells transfected with Lv-NC and blank control cells, and the invasive ability of stable overexpressed gastric cancer cells was higher than that of cells transfected with Lv-NC and blank control cells.
CONCLUSION ANGPTL2 contributed to proliferation and invasion of gastric cancer cells. In clinical treatment, ANGPTL2 may become a new target for treatment of gastric cancer.
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Amadatsu T, Morinaga J, Kawano T, Terada K, Kadomatsu T, Miyata K, Endo M, Kasamo D, Kuratsu JI, Oike Y. Macrophage-Derived Angiopoietin-Like Protein 2 Exacerbates Brain Damage by Accelerating Acute Inflammation after Ischemia-Reperfusion. PLoS One 2016; 11:e0166285. [PMID: 27861531 PMCID: PMC5115716 DOI: 10.1371/journal.pone.0166285] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [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: 01/22/2016] [Accepted: 10/26/2016] [Indexed: 11/18/2022] Open
Abstract
Ischemic stroke is a leading cause of death and disability worldwide. Several reports suggest that acute inflammation after ischemia-reperfusion exacerbates brain damage; however, molecular mechanisms underlying this effect remain unclear. Here, we report that MAC-3-positive immune cells, including infiltrating bone marrow-derived macrophages and activated microglia, express abundant angiopoietin-like protein (ANGPTL) 2 in ischemic mouse brain in a transient middle cerebral artery occlusion (MCAO) model. Both neurological deficits and infarct volume decreased in transient MCAO model mice established in Angptl2 knockout (KO) relative to wild-type mice. Acute brain inflammation after ischemia-reperfusion, as estimated by expression levels of pro-inflammatory cytokines such as interleukin (IL)-1β and tumor necrosis factor alpha (TNF)-α, was significantly suppressed in Angptl2 KO compared to control mice. Moreover, analysis employing bone marrow chimeric models using Angptl2 KO and wild-type mice revealed that infiltrated bone marrow-derived macrophages secreting ANGPTL2 significantly contribute to acute brain injury seen after ischemia-reperfusion. These studies demonstrate that infiltrating bone marrow-derived macrophages promote inflammation and injury in affected brain areas after ischemia-reperfusion, likely via ANGPTL2 secretion in the acute phase of ischemic stroke.
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Affiliation(s)
- Toshihiro Amadatsu
- Department of Molecular Genetics, Graduate school of Medical Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto, 860–8556, Japan
- Department of Neurosurgery, Graduate School of Medical Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto, 860–8556, Japan
| | - Jun Morinaga
- Department of Molecular Genetics, Graduate school of Medical Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto, 860–8556, Japan
| | - Takayuki Kawano
- Department of Neurosurgery, Graduate School of Medical Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto, 860–8556, Japan
| | - Kazutoyo Terada
- Department of Molecular Genetics, Graduate school of Medical Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto, 860–8556, Japan
| | - Tsuyoshi Kadomatsu
- Department of Molecular Genetics, Graduate school of Medical Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto, 860–8556, Japan
| | - Keishi Miyata
- Department of Molecular Genetics, Graduate school of Medical Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto, 860–8556, Japan
| | - Motoyoshi Endo
- Department of Molecular Genetics, Graduate school of Medical Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto, 860–8556, Japan
| | - Daiki Kasamo
- Department of Molecular Genetics, Graduate school of Medical Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto, 860–8556, Japan
- Department of Neurosurgery, Graduate School of Medical Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto, 860–8556, Japan
| | - Jun-ichi Kuratsu
- Department of Neurosurgery, Graduate School of Medical Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto, 860–8556, Japan
| | - Yuichi Oike
- Department of Molecular Genetics, Graduate school of Medical Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto, 860–8556, Japan
- * E-mail:
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Gellen B, Thorin-Trescases N, Sosner P, Gand E, Saulnier PJ, Ragot S, Fraty M, Laugier S, Ducrocq G, Montaigne D, Llaty P, Rigalleau V, Zaoui P, Halimi JM, Roussel R, Thorin E, Hadjadj S. ANGPTL2 is associated with an increased risk of cardiovascular events and death in diabetic patients. Diabetologia 2016; 59:2321-2330. [PMID: 27491833 DOI: 10.1007/s00125-016-4066-5] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [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: 04/22/2016] [Accepted: 07/12/2016] [Indexed: 01/24/2023]
Abstract
AIMS/HYPOTHESIS A high serum angiopoietin-like 2 (ANGPTL2) concentration is an independent risk factor for developing diabetes and is associated with insulin resistance and atherosclerosis. In this work, we have examined the impact of serum ANGPTL2 on improving cardiovascular (CV) risk stratification in patients with type 2 diabetes. METHODS A prospective, monocentric cohort of consecutive type 2 diabetes patients (the SURDIAGENE cohort; total of 1353 type 2 diabetes patients; 58% men, mean ± SD age 64 ± 11 years) was followed for a median of 6.0 years for death as primary endpoint and major adverse CV events (MACE; i.e. CV death, myocardial infarction or stroke) as a secondary endpoint. Patients with end-stage renal disease, defined as a requirement for dialysis or a history of kidney transplantation, were excluded. Patients were grouped into quartiles according to ANGPTL2 concentrations at inclusion: <11.2 (Q1), 11.2-14.7 (Q2), 14.8-19.5 (Q3) or >19.5 (Q4) ng/ml. RESULTS During follow up, 367 patients (representing 4.5% of the total person-years) died and 290 patients (representing 3.7% of the total person-years) presented with MACE. Both the survival and MACE-free survival rates were significantly different between ANGPTL2 quartiles (logrank 82.12, p < 0.0001 for death; and logrank 65.14, p < 0.0001 for MACE). Patients with ANGPTL2 concentrations higher than 19.5 ng/ml (Q4) had a significantly higher risk of death and MACE than those with ANGPTL2 levels of 19.5 ng/ml or less (Q1-3) (HR for death 2.44 [95% CI 1.98, 3.00], p < 0.0001; HR for MACE 2.43 [95% CI 1.92, 3.06], p < 0.0001) after adjustment for sex, age and established CV risk factors. Using ANGPTL2 concentrations, prediction of the risk of mortality, as assessed by integrated discrimination improvement (IDI), was significantly improved (IDI 0.006 ± 0.002, p = 0.0002). CONCLUSIONS/INTERPRETATION In patients with type 2 diabetes, serum ANGPTL2 concentrations were independently associated with death and MACE. Therefore, ANGPTL2 is a promising candidate biomarker for improving risk stratification in type 2 diabetes patients, and may prove to be a valuable therapeutic target.
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Affiliation(s)
- Barnabas Gellen
- ELSAN, Polyclinique de Poitiers, 1 Rue de la Providence, F-8600, Poitiers, France.
- Department of Cardiology, CHU Henri Mondor, Créteil, France.
- Faculté de Médecine et Pharmacie, Université de Poitiers, Poitiers, France.
| | - Nathalie Thorin-Trescases
- Department of Surgery, Faculty of Medicine, Université de Montréal, Montreal Heart Institute, Montreal, QC, Canada
| | - Philippe Sosner
- CHU de Poitiers Centre d'Investigation Clinique, Poitiers, France
- Université de Poitiers, Laboratoire MOVE (EA 6314), Poitiers, France
- Centre Médico-Sportif Mon Stade, Paris, France
| | - Elise Gand
- CHU de Poitiers, Pôle Dune, Poitiers, France
| | - Pierre-Jean Saulnier
- CHU de Poitiers Centre d'Investigation Clinique, Poitiers, France
- Inserm, CIC 1402, Poitiers, France
- UFR Médecine Pharmacie, Université de Poitiers, Poitiers, France
| | - Stéphanie Ragot
- CHU de Poitiers Centre d'Investigation Clinique, Poitiers, France
| | | | - Stéphanie Laugier
- UFR Médecine Pharmacie, Université de Poitiers, Poitiers, France
- Endocrinologie-Diabétologie, CHU de Poitiers, Poitiers, France
| | - Grégory Ducrocq
- Département Hospitalo-Universitaire FIRE, APHP, Hôpital Bichat, Paris, France
- Faculté de Médecine, Université Paris Diderot, Sorbonne Paris Cité, Paris, France
- Inserm U-1148, Paris, France
| | - David Montaigne
- CHU Lille, Service d'Explorations Fonctionnelles Cardiovasculaires, Hôpital Cardiologique, Lille, France
- Faculté de Médecine, Université de Lille, Lille, France
- Inserm U1011, Lille, France
- EGID, Lille, France
- Institut Pasteur de Lille, Lille, France
| | - Pierre Llaty
- CHU de Poitiers Centre d'Investigation Clinique, Poitiers, France
| | - Vincent Rigalleau
- CHU Bordeaux, Haut-Lévêque Hospital, Nutrition-Diabetology Department, Pessac, France
| | - Philippe Zaoui
- CHU de Grenoble, Service Néphrologie, Dialyse et Transplantation, Grenoble, France
- Faculté de Médecine, Université Joseph Fournier, Grenoble, France
| | - Jean-Michel Halimi
- CHU de Tours, Service Néphrologie, Dialyse et Transplantation, Tours, France
| | - Ronan Roussel
- Département Hospitalo-Universitaire FIRE, APHP, Hôpital Bichat, Paris, France
- Faculté de Médecine, Université Paris Diderot, Sorbonne Paris Cité, Paris, France
| | - Eric Thorin
- Department of Surgery, Faculty of Medicine, Université de Montréal, Montreal Heart Institute, Montreal, QC, Canada
| | - Samy Hadjadj
- CHU de Poitiers Centre d'Investigation Clinique, Poitiers, France
- Inserm, CIC 1402, Poitiers, France
- UFR Médecine Pharmacie, Université de Poitiers, Poitiers, France
- Endocrinologie-Diabétologie, CHU de Poitiers, Poitiers, France
- Inserm U1082, Poitiers, France
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Thorin-Trescases N, Hayami D, Yu C, Luo X, Nguyen A, Larouche JF, Lalongé J, Henri C, Arsenault A, Gayda M, Juneau M, Lambert J, Thorin E, Nigam A. Exercise Lowers Plasma Angiopoietin-Like 2 in Men with Post-Acute Coronary Syndrome. PLoS One 2016; 11:e0164598. [PMID: 27736966 PMCID: PMC5063321 DOI: 10.1371/journal.pone.0164598] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [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: 07/26/2016] [Accepted: 09/27/2016] [Indexed: 12/11/2022] Open
Abstract
Pro-inflammatory angiopoietin-like 2 (angptl2) promotes endothelial dysfunction in mice and circulating angptl2 is higher in patients with cardiovascular diseases. We previously reported that a single bout of physical exercise was able to reduce angptl2 levels in coronary patients. We hypothesized that chronic exercise would reduce angptl2 in patients with post-acute coronary syndrome (ACS) and endothelial dysfunction. Post-ACS patients (n = 40, 10 women) were enrolled in a 3-month exercise-based prevention program. Plasma angptl2, hs-CRP, and endothelial function assessed by scintigraphic forearm blood flow, were measured before and at the end of the study. Exercise increased VO2peak by 10% (p<0.05), but did not significantly affect endothelial function, in both men and women. In contrast, exercise reduced angptl2 levels only in men (-26±7%, p<0.05), but unexpectedly not in women (+30±16%), despite similar initial levels in both groups. Exercise reduced hs-CRP levels in men but not in women. In men, levels of angptl2, but not of hs-CRP, reached at the end of the training program were negatively correlated with VO2peak (r = -0.462, p = 0.012) and with endothelial function (r = -0.419, p = 0.033) measured at baseline: better initial cardiopulmonary fitness and endothelial function correlated with lower angptl2 levels after exercise. Pre-exercise angptl2 levels were lower if left ventricular ejection time was long (p<0.05) and the drop in angptl2 induced by exercise was greater if the cardiac output was high (p<0.05). In conclusion, in post-ACS men, angptl2 levels are sensitive to chronic exercise training. Low circulating angptl2 reached after training may reflect good endothelial and cardiopulmonary functions.
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Affiliation(s)
| | - Doug Hayami
- Montreal Heart Institute, Research Center, University of Montreal, Montreal, Quebec, Canada
- Cardiac Rehabilitation and Prevention Center (EPIC) of the Montreal Heart Institute, University of Montreal, Montreal, Quebec, Canada
| | - Carol Yu
- Montreal Heart Institute, Research Center, University of Montreal, Montreal, Quebec, Canada
- Departments of Pharmacology and Surgery, Faculty of Medicine, University of Montreal, Montreal, Quebec, Canada
| | - Xiaoyan Luo
- Montreal Heart Institute, Research Center, University of Montreal, Montreal, Quebec, Canada
| | - Albert Nguyen
- Montreal Heart Institute, Research Center, University of Montreal, Montreal, Quebec, Canada
- Departments of Pharmacology and Surgery, Faculty of Medicine, University of Montreal, Montreal, Quebec, Canada
| | - Jean-François Larouche
- Montreal Heart Institute, Research Center, University of Montreal, Montreal, Quebec, Canada
- Cardiac Rehabilitation and Prevention Center (EPIC) of the Montreal Heart Institute, University of Montreal, Montreal, Quebec, Canada
| | - Julie Lalongé
- Cardiac Rehabilitation and Prevention Center (EPIC) of the Montreal Heart Institute, University of Montreal, Montreal, Quebec, Canada
| | - Christine Henri
- Montreal Heart Institute, Research Center, University of Montreal, Montreal, Quebec, Canada
| | - André Arsenault
- Montreal Heart Institute, Research Center, University of Montreal, Montreal, Quebec, Canada
- Montreal Behavioral Medicine Centre, Montreal, Quebec, Canada
| | - Mathieu Gayda
- Montreal Heart Institute, Research Center, University of Montreal, Montreal, Quebec, Canada
- Cardiac Rehabilitation and Prevention Center (EPIC) of the Montreal Heart Institute, University of Montreal, Montreal, Quebec, Canada
| | - Martin Juneau
- Montreal Heart Institute, Research Center, University of Montreal, Montreal, Quebec, Canada
- Cardiac Rehabilitation and Prevention Center (EPIC) of the Montreal Heart Institute, University of Montreal, Montreal, Quebec, Canada
| | - Jean Lambert
- Montreal Heart Institute, Research Center, University of Montreal, Montreal, Quebec, Canada
- School of Public Health, University of Montreal, Montreal, Quebec, Canada
| | - Eric Thorin
- Montreal Heart Institute, Research Center, University of Montreal, Montreal, Quebec, Canada
- Departments of Pharmacology and Surgery, Faculty of Medicine, University of Montreal, Montreal, Quebec, Canada
- * E-mail:
| | - Anil Nigam
- Montreal Heart Institute, Research Center, University of Montreal, Montreal, Quebec, Canada
- Cardiac Rehabilitation and Prevention Center (EPIC) of the Montreal Heart Institute, University of Montreal, Montreal, Quebec, Canada
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Motokawa I, Endo M, Terada K, Horiguchi H, Miyata K, Kadomatsu T, Morinaga J, Sugizaki T, Ito T, Araki K, Morioka MS, Manabe I, Samukawa T, Watanabe M, Inoue H, Oike Y. Interstitial pneumonia induced by bleomycin treatment is exacerbated in Angptl2-deficient mice. Am J Physiol Lung Cell Mol Physiol 2016; 311:L704-L713. [PMID: 27542805 DOI: 10.1152/ajplung.00005.2016] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [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] [Received: 01/05/2016] [Accepted: 08/12/2016] [Indexed: 11/22/2022] Open
Abstract
Angiopoietin-like protein 2 (ANGPTL2) is a chronic inflammatory mediator that, when deregulated, is associated with various pathologies. However, little is known about its activity in lung. To assess a possible lung function, we generated a rabbit monoclonal antibody that specifically recognizes mouse ANGPTL2 and then evaluated protein expression in mouse lung tissue. We observed abundant ANGPTL2 expression in both alveolar epithelial type I and type II cells and in resident alveolar macrophages under normal conditions. To assess ANGPTL2 function, we compared lung phenotypes in Angptl2 knockout (KO) and wild-type mice but observed no overt changes. We then generated a bleomycin-induced interstitial pneumonia model using wild-type and Angptl2 KO mice. Bleomycin-treated wild-type mice showed specifically upregulated ANGPTL2 expression in areas of severe fibrosing interstitial pneumonia, while Angptl2 KO mice developed more severe lung fibrosis than did comparably treated wild-type mice. Lung fibrosis seen following bone marrow transplant was comparable in wild-type or Angptl2 KO mice treated with bleomycin, suggesting that Angptl2 loss in myeloid cells does not underlie fibrotic phenotypes. We conclude that Angptl2 deficiency in lung epithelial cells and resident alveolar macrophages causes severe lung fibrosis seen following bleomycin treatment, suggesting that ANGPTL2 derived from these cell types plays a protective role against fibrosis in lung.
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Affiliation(s)
- Ikuyo Motokawa
- Department of Molecular Genetics, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan; Department of Pulmonary Medicine, Graduate School of Medical and Dental Sciences, Kagoshima University, Kagoshima, Japan
| | - Motoyoshi Endo
- Department of Molecular Genetics, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan;
| | - Kazutoyo Terada
- Department of Molecular Genetics, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - Haruki Horiguchi
- Department of Molecular Genetics, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - Keishi Miyata
- Department of Molecular Genetics, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - Tsuyoshi Kadomatsu
- Department of Molecular Genetics, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - Jun Morinaga
- Department of Molecular Genetics, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - Taichi Sugizaki
- Department of Molecular Genetics, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - Takaaki Ito
- Department of Pathology and Experimental Medicine, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - Kimi Araki
- Division of Developmental Genetics, Institute of Resource Developmental and Analysis, Kumamoto University, Kumamoto, Japan
| | - Masaki Suimye Morioka
- Department of Bioinformatics, Medical Research Institute, Tokyo Medical and Dental University, Tokyo, Japan
| | - Ichiro Manabe
- Department of Cardiovascular Medicine, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan; and
| | - Takuya Samukawa
- Department of Pulmonary Medicine, Graduate School of Medical and Dental Sciences, Kagoshima University, Kagoshima, Japan
| | - Masaki Watanabe
- Department of Pulmonary Medicine, Graduate School of Medical and Dental Sciences, Kagoshima University, Kagoshima, Japan
| | - Hiromasa Inoue
- Department of Pulmonary Medicine, Graduate School of Medical and Dental Sciences, Kagoshima University, Kagoshima, Japan
| | - Yuichi Oike
- Department of Molecular Genetics, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
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Liu Z, Liu C, Hao C, Xue Q, Huang X, Zhang N, Bao H, Qu Q. Aberrant expression of angiopoietin-like proteins 1 and 2 in cumulus cells is potentially associated with impaired oocyte developmental competence in polycystic ovary syndrome. Gynecol Endocrinol 2016; 32:557-61. [PMID: 26829602 DOI: 10.3109/09513590.2016.1138463] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Polycystic ovary syndrome (PCOS) is a heterogeneous endocrine disorder associated with obesity, insulin resistance, hyperandrogenism, alterations in ovarian angiogenesis and impaired oocyte competence. Emerging evidence demonstrates that angiopoietin-like protein 1 (ANGPTL1) and angiopoietin-like protein 2 (ANGPTL2) have an important influence on angiogenesis, androgen biosynthesis, insulin resistance and adipocytes function. In this study, we set out to determine the potential relationship between ANGPTL1, ANGPTL2 and oocyte competence in PCOS through analyzing the expression levels and dynamic pattern of the two genes in cumulus cells (CCs) during different phases of nuclear maturation of PCOS patients and control groups undergoing controlled ovarian hyperstimulation (COH) for in vitro fertilization and embryo transfer. We found that the relative abundance of ANGPTL1 and ANGPTL2 transcripts in CCs from patients with PCOS showed dynamic changes during oocyte maturation. Specifically, their expressions were increased significantly at the Metaphase II stage. In summary, the present novel evidence indicates that the expression patterns of ANGPTL1 and ANGPTL2 mRNAs are disordered during oocyte maturation in PCOS, which were potentially related to aberrant oocyte quality and developmental potency, at least in part, via pathological angiogenesis and metabolism.
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Affiliation(s)
- Zhenteng Liu
- a Department of Reproductive Medicine , Yantai Yuhuangding Hospital, Affiliated Hospital of Medical College of Qingdao University , Yantai , Shandong , China
| | - Chang Liu
- b Medical College of Shandong University , Jinan , Shandong , China , and
| | - Cuifang Hao
- a Department of Reproductive Medicine , Yantai Yuhuangding Hospital, Affiliated Hospital of Medical College of Qingdao University , Yantai , Shandong , China
| | - Qianwen Xue
- c Department of Gynecology , Qingdao Women and Children Health Care Center , Qingdao , Shandong , China
| | - Xin Huang
- a Department of Reproductive Medicine , Yantai Yuhuangding Hospital, Affiliated Hospital of Medical College of Qingdao University , Yantai , Shandong , China
| | - Ning Zhang
- a Department of Reproductive Medicine , Yantai Yuhuangding Hospital, Affiliated Hospital of Medical College of Qingdao University , Yantai , Shandong , China
| | - Hongchu Bao
- a Department of Reproductive Medicine , Yantai Yuhuangding Hospital, Affiliated Hospital of Medical College of Qingdao University , Yantai , Shandong , China
| | - Qinglan Qu
- a Department of Reproductive Medicine , Yantai Yuhuangding Hospital, Affiliated Hospital of Medical College of Qingdao University , Yantai , Shandong , China
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Nguyen A, Mamarbachi M, Turcot V, Lessard S, Yu C, Luo X, Lalongé J, Hayami D, Gayda M, Juneau M, Thorin-Trescases N, Lettre G, Nigam A, Thorin E. Lower Methylation of the ANGPTL2 Gene in Leukocytes from Post-Acute Coronary Syndrome Patients. PLoS One 2016; 11:e0153920. [PMID: 27101308 PMCID: PMC4839636 DOI: 10.1371/journal.pone.0153920] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [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: 12/03/2015] [Accepted: 04/06/2016] [Indexed: 02/08/2023] Open
Abstract
DNA methylation is believed to regulate gene expression during adulthood in response to the constant changes in environment. The methylome is therefore proposed to be a biomarker of health through age. ANGPTL2 is a circulating pro-inflammatory protein that increases with age and prematurely in patients with coronary artery diseases; integrating the methylation pattern of the promoter may help differentiate age- vs. disease-related change in its expression. We believe that in a pro-inflammatory environment, ANGPTL2 is differentially methylated, regulating ANGPTL2 expression. To test this hypothesis we investigated the changes in promoter methylation of ANGPTL2 gene in leukocytes from patients suffering from post-acute coronary syndrome (ACS). DNA was extracted from circulating leukocytes of post-ACS patients with cardiovascular risk factors and from healthy young and age-matched controls. Methylation sites (CpGs) found in the ANGPTL2 gene were targeted for specific DNA methylation quantification. The functionality of ANGPTL2 methylation was assessed by an in vitro luciferase assay. In post-ACS patients, C-reactive protein and ANGPTL2 circulating levels increased significantly when compared to healthy controls. Decreased methylation of specific CpGs were found in the promoter of ANGPTL2 and allowed to discriminate age vs. disease associated methylation. In vitro DNA methylation of specific CpG lead to inhibition of ANGPTL2 promoter activity. Reduced leukocyte DNA methylation in the promoter region of ANGPTL2 is associated with the pro-inflammatory environment that characterizes patients with post-ACS differently from age-matched healthy controls. Methylation of different CpGs in ANGPTL2 gene may prove to be a reliable biomarker of coronary disease.
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Affiliation(s)
- Albert Nguyen
- Montreal Heart Institute, Research Center, Université de Montréal, Montreal, Quebec, Canada
- Department of Pharmacology, Faculty of Medicine, Université de Montréal, Montreal, Quebec, Canada
| | - Maya Mamarbachi
- Montreal Heart Institute, Research Center, Université de Montréal, Montreal, Quebec, Canada
| | - Valérie Turcot
- Montreal Heart Institute, Research Center, Université de Montréal, Montreal, Quebec, Canada
| | - Samuel Lessard
- Montreal Heart Institute, Research Center, Université de Montréal, Montreal, Quebec, Canada
| | - Carol Yu
- Montreal Heart Institute, Research Center, Université de Montréal, Montreal, Quebec, Canada
- Department of Pharmacology, Faculty of Medicine, Université de Montréal, Montreal, Quebec, Canada
| | - Xiaoyan Luo
- Montreal Heart Institute, Research Center, Université de Montréal, Montreal, Quebec, Canada
| | - Julie Lalongé
- Montreal Heart Institute, Research Center, Université de Montréal, Montreal, Quebec, Canada
- Cardiac Rehabilitation and Prevention Center (EPIC) of the Montreal Heart Institute, Université de Montréal, Montreal, Quebec, Canada
| | - Doug Hayami
- Montreal Heart Institute, Research Center, Université de Montréal, Montreal, Quebec, Canada
- Cardiac Rehabilitation and Prevention Center (EPIC) of the Montreal Heart Institute, Université de Montréal, Montreal, Quebec, Canada
- Department of Medicine, Faculty of Medicine, Université de Montréal, Montreal, Quebec, Canada
| | - Mathieu Gayda
- Montreal Heart Institute, Research Center, Université de Montréal, Montreal, Quebec, Canada
- Cardiac Rehabilitation and Prevention Center (EPIC) of the Montreal Heart Institute, Université de Montréal, Montreal, Quebec, Canada
- Department of Medicine, Faculty of Medicine, Université de Montréal, Montreal, Quebec, Canada
| | - Martin Juneau
- Montreal Heart Institute, Research Center, Université de Montréal, Montreal, Quebec, Canada
- Cardiac Rehabilitation and Prevention Center (EPIC) of the Montreal Heart Institute, Université de Montréal, Montreal, Quebec, Canada
- Department of Medicine, Faculty of Medicine, Université de Montréal, Montreal, Quebec, Canada
| | | | - Guillaume Lettre
- Montreal Heart Institute, Research Center, Université de Montréal, Montreal, Quebec, Canada
- Department of Medicine, Faculty of Medicine, Université de Montréal, Montreal, Quebec, Canada
| | - Anil Nigam
- Montreal Heart Institute, Research Center, Université de Montréal, Montreal, Quebec, Canada
- Cardiac Rehabilitation and Prevention Center (EPIC) of the Montreal Heart Institute, Université de Montréal, Montreal, Quebec, Canada
- Department of Medicine, Faculty of Medicine, Université de Montréal, Montreal, Quebec, Canada
- * E-mail: (AN); (ET)
| | - Eric Thorin
- Montreal Heart Institute, Research Center, Université de Montréal, Montreal, Quebec, Canada
- Department of Surgery, Faculty of Medicine, Université de Montréal, Montreal, Quebec, Canada
- * E-mail: (AN); (ET)
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Huang CL, Wu YW, Wu CC, Hwang JJ, Yang WS. Serum Angiopoietin-Like Protein 2 Concentrations Are Independently Associated with Heart Failure. PLoS One 2015; 10:e0138678. [PMID: 26397985 PMCID: PMC4580406 DOI: 10.1371/journal.pone.0138678] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2015] [Accepted: 09/02/2015] [Indexed: 12/29/2022] Open
Abstract
Objective Angiopoietin-like protein 2 (ANGPTL2), which is mainly expressed from adipose tissue, is demonstrated to be involved in obesity, metabolic syndrome, and atherosclerosis. Because several adipocytokines are known to be associated with heart failure (HF), here we investigated the association of ANGPTL2 and HF in Taiwanese subjects. Methods and Results A total of 170 symptomatic HF patients and 130 age- and sex-matched controls were enrolled from clinic. The echocardiography was analyzed in each patient, and stress myocardial perfusion study was performed for clinical suspicion of coronary artery disease. Detailed demographic information, medications, and biochemical data were recorded. Circulating adipocytokines, including tumor necrosis factor-alpha (TNF-α), adiponectin, adipocyte fatty acid-binding protein (A-FABP) and ANGPTL2, were analyzed. Compared with the control group subjects, serum ANGPTL2 concentrations were significantly higher in HF group patients. In correlation analyses, ANGPTL2 level was positively correlated to creatinine, fasting glucose, triglyceride, hsCRP, TNF-α, NT-proBNP and A-FABP levels, and negatively correlated with HDL-C and left ventricular ejection fraction. In multiple regression analysis, A-FABP, hsCRP, and HDL-C levels remained as independent predictors for ANGPTL2 level. To determine the association between serum ANGPTL2 concentrations and HF, multivariate logistic regression analyses were performed with subjects divided into tertiles by ANGPTL2 levels. For the subjects with ANGPTL2 levels in the highest tertile, their risk of HF was about 2.97 fold (95% CI = 1.24–7.08, P = 0.01) higher than those in the lowest tertile. Conclusion Our results demonstrate a higher circulating ANGPTL2 level in patients with HF, and the upregulating ANGPTL2 levels might be associated with metabolic derangements and inflammation.
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Affiliation(s)
- Chi-Lun Huang
- Department of Internal Medicine, Taoyuan General Hospital, Ministry of Health and Welfare, Taoyuan, Taiwan
- Department of Internal Medicine, National Taiwan University Hospital, Taipei, Taiwan
| | - Yen-Wen Wu
- Department of Internal Medicine, National Taiwan University Hospital, Taipei, Taiwan
- Department of Nuclear Medicine, National Taiwan University Hospital, Taipei, Taiwan
- Department of Nuclear Medicine and Cardiovascular Medical Center (Cardiology), Far Eastern Memorial Hospital, New Taipei City, Taiwan
- National Yang-Ming University School of Medicine, Taipei, Taiwan
- * E-mail: (WSY); (YWW)
| | - Chih-Cheng Wu
- Department of Internal Medicine, National Taiwan University Hospital Hsin-Chu branch, Hsinchu City, Taiwan
| | - Juey-Jen Hwang
- Department of Internal Medicine, National Taiwan University Hospital, Taipei, Taiwan
| | - Wei-Shiung Yang
- Department of Internal Medicine, National Taiwan University Hospital, Taipei, Taiwan
- Graduate Institute of Clinical Medicine, College of Medicine, National Taiwan University, Taipei, Taiwan
- * E-mail: (WSY); (YWW)
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Shimura T, Toiyama Y, Tanaka K, Saigusa S, Kitajima T, Kondo S, Okigami M, Yasuda H, Ohi M, Araki T, Inoue Y, Uchida K, Mohri Y, Kusunoki M. Angiopoietin-like Protein 2 as a Predictor of Early Recurrence in Patients After Curative Surgery for Gastric Cancer. Anticancer Res 2015; 35:4633-4639. [PMID: 26254352] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
BACKGROUND Angiopoietin-like protein-2 (ANGPTL2) mediates chronic inflammation. Tumor cell-derived ANGPTL2 promotes tumor invasion and angiogenesis. ANGPTL2 expression has not been fully investigated in gastric cancer (GC). MATERIALS AND METHODS ANGPTL2 expression in 354 patients with GC was assessed by immunohistochemistry (IHC). IHC scores were calculated, and the association of ANGPTL2 with clinicopathological factors and patient outcomes was evaluated. RESULTS Immunoreactive ANGPTL2 protein was expressed mainly in GC cell cytoplasm. Kaplan-Meier analysis showed that high expression of ANGPTL2 indicated significantly poorer overall disease-free survival (DFS). Among patients with curatively resected GC, multivariate analysis for DFS revealed that high ANGPTL2 expression (p<0.01), advanced T-stage (p=0.015), lymph node metastasis (p<0.01), and advanced Unio Internationalis Contra Cancrum (UICC) stage (p<0.01) were independent risk factors for poor DFS. CONCLUSION High cytoplasmic ANGPTL2 expression in GC tissue was associated with tumor progression, invasion, metastasis, and poor prognosis. ANGPTL2 may be a useful marker for detecting early postoperative recurrence in patients with GC.
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Affiliation(s)
- Tadanobu Shimura
- Department of Gastrointestinal and Pediatric Surgery, Mie University Graduate School of Medicine, Tsu, Mie, Japan
| | - Yuji Toiyama
- Department of Gastrointestinal and Pediatric Surgery, Mie University Graduate School of Medicine, Tsu, Mie, Japan
| | - Koji Tanaka
- Department of Gastrointestinal and Pediatric Surgery, Mie University Graduate School of Medicine, Tsu, Mie, Japan
| | - Susumu Saigusa
- Department of Gastrointestinal and Pediatric Surgery, Mie University Graduate School of Medicine, Tsu, Mie, Japan
| | - Takahito Kitajima
- Department of Gastrointestinal and Pediatric Surgery, Mie University Graduate School of Medicine, Tsu, Mie, Japan
| | - Satoru Kondo
- Department of Gastrointestinal and Pediatric Surgery, Mie University Graduate School of Medicine, Tsu, Mie, Japan
| | - Masato Okigami
- Department of Gastrointestinal and Pediatric Surgery, Mie University Graduate School of Medicine, Tsu, Mie, Japan
| | - Hiromi Yasuda
- Department of Gastrointestinal and Pediatric Surgery, Mie University Graduate School of Medicine, Tsu, Mie, Japan
| | - Masaki Ohi
- Department of Gastrointestinal and Pediatric Surgery, Mie University Graduate School of Medicine, Tsu, Mie, Japan
| | - Toshimitsu Araki
- Department of Gastrointestinal and Pediatric Surgery, Mie University Graduate School of Medicine, Tsu, Mie, Japan
| | - Yasuhiro Inoue
- Department of Gastrointestinal and Pediatric Surgery, Mie University Graduate School of Medicine, Tsu, Mie, Japan
| | - Keiichi Uchida
- Department of Gastrointestinal and Pediatric Surgery, Mie University Graduate School of Medicine, Tsu, Mie, Japan
| | - Yasuhiko Mohri
- Department of Gastrointestinal and Pediatric Surgery, Mie University Graduate School of Medicine, Tsu, Mie, Japan
| | - Masato Kusunoki
- Department of Gastrointestinal and Pediatric Surgery, Mie University Graduate School of Medicine, Tsu, Mie, Japan
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Sasaki Y, Ohta M, Desai D, Figueiredo JL, Whelan MC, Sugano T, Yamabi M, Yano W, Faits T, Yabusaki K, Zhang H, Mlynarchik AK, Inoue K, Mizuno K, Aikawa M. Angiopoietin Like Protein 2 (ANGPTL2) Promotes Adipose Tissue Macrophage and T lymphocyte Accumulation and Leads to Insulin Resistance. PLoS One 2015; 10:e0131176. [PMID: 26132105 PMCID: PMC4489192 DOI: 10.1371/journal.pone.0131176] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2015] [Accepted: 05/31/2015] [Indexed: 02/07/2023] Open
Abstract
OBJECTIVES Angiopoietin-like protein 2 (ANGPTL2), a recently identified pro-inflammatory cytokine, is mainly secreted from the adipose tissue. This study aimed to explore the role of ANGPTL2 in adipose tissue inflammation and macrophage activation in a mouse model of diabetes. METHODOLOGY/PRINCIPAL FINDINGS Adenovirus mediated lacZ (Ad-LacZ) or human ANGPTL2 (Ad-ANGPTL2) was delivered via tail vein in diabetic db/db mice. Ad-ANGPTL2 treatment for 2 weeks impaired both glucose tolerance and insulin sensitivity as compared to Ad-LacZ treatment. Ad-ANGPTL2 treatment significantly induced pro-inflammatory gene expression in white adipose tissue. We also isolated stromal vascular fraction from epididymal fat pad and analyzed adipose tissue macrophage and T lymphocyte populations by flow cytometry. Ad-ANGPTL2 treated mice had more adipose tissue macrophages (F4/80+CD11b+) and a larger M1 macrophage subpopulation (F4/80+CD11b+CD11c+). Moreover, Ad-ANGPTL2 treatment increased a CD8-positive T cell population in adipose tissue, which preceded increased macrophage accumulation. Consistent with our in vivo results, recombinant human ANGPTL2 protein treatment increased mRNA levels of pro-inflammatory gene products and production of TNF-α protein in the human macrophage-like cell line THP-1. Furthermore, Ad-ANGPTL2 treatment induced lipid accumulation and increased fatty acid synthesis, lipid metabolism related gene expression in mouse liver. CONCLUSION ANGPTL2 treatment promotes macrophage accumulation and activation. These results suggest potential mechanisms for insulin resistance.
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Affiliation(s)
- Yusuke Sasaki
- Center for Interdisciplinary Cardiovascular Sciences, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts, United States of America
- Tokyo New Drug Research Laboratories, Kowa Company, Ltd., Tokyo, Japan
| | - Masayuki Ohta
- Center for Interdisciplinary Cardiovascular Sciences, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts, United States of America
- Tokyo New Drug Research Laboratories, Kowa Company, Ltd., Tokyo, Japan
| | - Dhruv Desai
- Center for Interdisciplinary Cardiovascular Sciences, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts, United States of America
| | - Jose-Luiz Figueiredo
- Center for Interdisciplinary Cardiovascular Sciences, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts, United States of America
| | - Mary C. Whelan
- Center for Interdisciplinary Cardiovascular Sciences, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts, United States of America
| | - Tomohiro Sugano
- Center for Interdisciplinary Cardiovascular Sciences, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts, United States of America
- Tokyo New Drug Research Laboratories, Kowa Company, Ltd., Tokyo, Japan
| | - Masaki Yamabi
- Center for Interdisciplinary Cardiovascular Sciences, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts, United States of America
- Tokyo New Drug Research Laboratories, Kowa Company, Ltd., Tokyo, Japan
| | - Wataru Yano
- Center for Interdisciplinary Cardiovascular Sciences, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts, United States of America
- Tokyo New Drug Research Laboratories, Kowa Company, Ltd., Tokyo, Japan
| | - Tyler Faits
- Center for Interdisciplinary Cardiovascular Sciences, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts, United States of America
| | - Katsumi Yabusaki
- Center for Interdisciplinary Cardiovascular Sciences, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts, United States of America
- Tokyo New Drug Research Laboratories, Kowa Company, Ltd., Tokyo, Japan
| | - Hengmin Zhang
- Center for Interdisciplinary Cardiovascular Sciences, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts, United States of America
| | - Andrew K. Mlynarchik
- Center for Interdisciplinary Cardiovascular Sciences, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts, United States of America
| | - Keisuke Inoue
- Center for Interdisciplinary Cardiovascular Sciences, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts, United States of America
- Tokyo New Drug Research Laboratories, Kowa Company, Ltd., Tokyo, Japan
| | - Ken Mizuno
- Center for Interdisciplinary Cardiovascular Sciences, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts, United States of America
- Tokyo New Drug Research Laboratories, Kowa Company, Ltd., Tokyo, Japan
| | - Masanori Aikawa
- Center for Interdisciplinary Cardiovascular Sciences, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts, United States of America
- * E-mail:
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Toiyama Y, Inoue Y, Shimura T, Fujikawa H, Saigusa S, Hiro J, Kobayashi M, Ohi M, Araki T, Tanaka K, Mohri Y, Kusunoki M. Serum Angiopoietin-like Protein 2 Improves Preoperative Detection of Lymph Node Metastasis in Colorectal Cancer. Anticancer Res 2015; 35:2849-2856. [PMID: 25964566] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
AIM We investigated whether serum markers and clinical factors could be used to preoperatively predict lymph node (LN) metastasis in colorectal cancer (CRC). PATIENTS AND METHODS The present study enrolled 157 curative CRC patients for whom preoperative serum carcinoembryonic antigen (CEA), systemic inflammatory markers (C-reactive protein (CRP) and angiopoietin-like protein 2 (ANGPTL2)) and objective preoperative clinical factors were available as indicators of pathological LN status. RESULTS Specific clinical factors, including gender, tumor size, histopathology of biopsy sample and tumor morphology, were significantly correlated with LN metastases. Additionally, CEA, CRP and ANGPTL2 levels were also predictive factors for LN status. Multivariate analysis revealed that clinical factors, including gender, histopathology, tumor morphology and ANGPTL2, were identified as independent predictive factors for LN metastases. A combination of clinical factors reached high predictive accuracy of LN metastases and, combined with clinical factors, ANGPTL2 further improved the accuracy. CONCLUSION Serum ANGPTL2 improves preoperative detection of LN metastasis in CRC.
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Affiliation(s)
- Yuji Toiyama
- Department of Gastrointestinal and Pediatric Surgery, Division of Reparative Medicine, Institute of Life Sciences, Graduate School of Medicine, Mie University, Mie, Japan
| | - Yasuhiro Inoue
- Department of Gastrointestinal and Pediatric Surgery, Division of Reparative Medicine, Institute of Life Sciences, Graduate School of Medicine, Mie University, Mie, Japan
| | - Tadanobu Shimura
- Department of Gastrointestinal and Pediatric Surgery, Division of Reparative Medicine, Institute of Life Sciences, Graduate School of Medicine, Mie University, Mie, Japan
| | - Hiroyuki Fujikawa
- Department of Gastrointestinal and Pediatric Surgery, Division of Reparative Medicine, Institute of Life Sciences, Graduate School of Medicine, Mie University, Mie, Japan
| | - Susumu Saigusa
- Department of Gastrointestinal and Pediatric Surgery, Division of Reparative Medicine, Institute of Life Sciences, Graduate School of Medicine, Mie University, Mie, Japan
| | - Jyunichiro Hiro
- Department of Gastrointestinal and Pediatric Surgery, Division of Reparative Medicine, Institute of Life Sciences, Graduate School of Medicine, Mie University, Mie, Japan
| | - Minako Kobayashi
- Department of Gastrointestinal and Pediatric Surgery, Division of Reparative Medicine, Institute of Life Sciences, Graduate School of Medicine, Mie University, Mie, Japan
| | - Masaki Ohi
- Department of Gastrointestinal and Pediatric Surgery, Division of Reparative Medicine, Institute of Life Sciences, Graduate School of Medicine, Mie University, Mie, Japan
| | - Toshimitsu Araki
- Department of Gastrointestinal and Pediatric Surgery, Division of Reparative Medicine, Institute of Life Sciences, Graduate School of Medicine, Mie University, Mie, Japan
| | - Koji Tanaka
- Department of Gastrointestinal and Pediatric Surgery, Division of Reparative Medicine, Institute of Life Sciences, Graduate School of Medicine, Mie University, Mie, Japan
| | - Yasuhiko Mohri
- Department of Gastrointestinal and Pediatric Surgery, Division of Reparative Medicine, Institute of Life Sciences, Graduate School of Medicine, Mie University, Mie, Japan
| | - Masato Kusunoki
- Department of Gastrointestinal and Pediatric Surgery, Division of Reparative Medicine, Institute of Life Sciences, Graduate School of Medicine, Mie University, Mie, Japan
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SATO RYUTA, YAMASAKI MUTSUSHI, HIRAI KENICHI, MATSUBARA TAKANORI, NOMURA TAKEO, SATO FUMINORI, MIMATA HIROMITSU. Angiopoietin-like protein 2 induces androgen-independent and malignant behavior in human prostate cancer cells. Oncol Rep 2015; 33:58-66. [PMID: 25370833 PMCID: PMC4254678 DOI: 10.3892/or.2014.3586] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [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] [Subscribe] [Scholar Register] [Received: 06/29/2014] [Accepted: 10/06/2014] [Indexed: 12/30/2022] Open
Abstract
Angiopoietin-like proteins (ANGPTLs), which comprise 7 members (ANGPTL1-ANGPTL7), structurally resemble angiopoietins. We investigated the roles of ANGPTLs in the acquisition of androgen independence and the malignant behavior of human prostate cancer cells. Expression of ANGPTL messenger RNA (mRNA) and proteins were ascertained using RT-qPCR and western blot analysis in human prostate cancer cell lines. Androgen‑dependent LNCaP and androgen-independent LNCaP/AI cells, respectively, were cultured in fetal bovine and charcoal-stripped medium. Cell proliferation, androgen dependence, migration and invasion, respectively, were examined under the overexpression and knockdown of ANGPTL2 by transfection of ANGPTL2 cDNA and its small‑interfering RNA (siRNA). The effects of exogenous ANGPTL2 and blocking of its receptor, integrin α5β1, were also investigated. Human prostate cancer cell lines predominantly expressed ANGPTL2 among the members. Interrupting ANGPTL2 expression with siRNA suppressed the proliferation, migration and invasion of LNCaP cells. LNCaP/AI cells showed a higher ANGPTL2 expression than that of LNCaP cells. Furthermore, siRNA led to apoptosis of LNCaP/AI cells. The ANGPTL2-overexpressing LNCaP cells markedly increased proliferation, epithelial-to-mesenchymal transition (EMT) and malignant behavior in androgen‑deprived medium. The migration rates were increased depending on the concentration of ANGPTL2 recombinant protein and were inhibited by anti-integrin α5β1 antibodies. To the best of our knowledge, this is the first study to elucidate the expression of ANGPTL2 in human prostate cancer cells. ANGPTL2 may be important in the acquisition of androgen independency and tumor progression of prostate cancer in an autocrine and/or paracrine manner via the integrin α5β1 receptor. Targeting ANGPTL2 may therefore be an efficacious therapeutic modality for prostate cancer.
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Affiliation(s)
- RYUTA SATO
- Department of Urology, Oita University Faculty of Medicine, Hasama, Yufu-city, Oita 879-5593, Japan
| | - MUTSUSHI YAMASAKI
- Department of Urology, Oita University Faculty of Medicine, Hasama, Yufu-city, Oita 879-5593, Japan
| | - KENICHI HIRAI
- Department of Urology, Oita University Faculty of Medicine, Hasama, Yufu-city, Oita 879-5593, Japan
| | - TAKANORI MATSUBARA
- Department of Urology, Oita University Faculty of Medicine, Hasama, Yufu-city, Oita 879-5593, Japan
| | - TAKEO NOMURA
- Department of Urology, Oita University Faculty of Medicine, Hasama, Yufu-city, Oita 879-5593, Japan
| | - FUMINORI SATO
- Department of Urology, Oita University Faculty of Medicine, Hasama, Yufu-city, Oita 879-5593, Japan
| | - HIROMITSU MIMATA
- Department of Urology, Oita University Faculty of Medicine, Hasama, Yufu-city, Oita 879-5593, Japan
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Kadomatsu T, Endo M, Miyata K, Oike Y. Diverse roles of ANGPTL2 in physiology and pathophysiology. Trends Endocrinol Metab 2014; 25:245-54. [PMID: 24746520 DOI: 10.1016/j.tem.2014.03.012] [Citation(s) in RCA: 106] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/29/2014] [Revised: 03/18/2014] [Accepted: 03/25/2014] [Indexed: 12/12/2022]
Abstract
Stresses based on aging and lifestyle can cause tissue damage. Repair of damage by tissue remodeling is often meditated by communications between parenchymal and stromal cells via cell-cell contact or humoral factors. However, loss of tissue homeostasis leads to chronic inflammation and pathological tissue remodeling. Angiopoietin-like protein 2 (ANGPTL2) maintains tissue homeostasis by promoting adaptive inflammation and subsequent tissue reconstruction, whereas excess ANGPTL2 activation induced by prolonged stress promotes breakdown of tissue homeostasis due to chronic inflammation and irreversible tissue remodeling, promoting development of various metabolic diseases. Thus, it is important to define how ANGPTL2 signaling is regulated in order to understand mechanisms underlying disease development. Here, we focus on ANGPTL2 function in physiology and pathophysiology.
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Affiliation(s)
- Tsuyoshi Kadomatsu
- Department of Molecular Genetics, Graduate School of Medical Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto 860-8556, Japan
| | - Motoyoshi Endo
- Department of Molecular Genetics, Graduate School of Medical Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto 860-8556, Japan
| | - Keishi Miyata
- Department of Molecular Genetics, Graduate School of Medical Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto 860-8556, Japan
| | - Yuichi Oike
- Department of Molecular Genetics, Graduate School of Medical Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto 860-8556, Japan; Core Research for Evolutional Science and Technology (CREST), Japan Science and Technology Agency, Chiyoda-ku, Tokyo 102-0075, Japan.
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Mas-Oliva J, Navarro-Vidal E, Tapia-Vieyra JV. ARP2, a novel pro-apoptotic protein expressed in epithelial prostate cancer LNCaP cells and epithelial ovary CHO transformed cells. PLoS One 2014; 9:e86089. [PMID: 24465888 PMCID: PMC3899214 DOI: 10.1371/journal.pone.0086089] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2013] [Accepted: 12/11/2013] [Indexed: 12/03/2022] Open
Abstract
Neoplastic epithelial cells generate the most aggressive types of cancers such as those located in the lung, breast, colon, prostate and ovary. During advanced stages of prostate cancer, epithelial cells are associated to the appearance of androgen-independent tumors, an apoptotic-resistant phenotype that ultimately overgrows and promotes metastatic events. We have previously identified and electrophysiologically characterized a novel Ca(2+)-permeable channel activated during apoptosis in the androgen-independent prostate epithelial cancer cell line, LNCaP. In addition, we reported for the first time the cloning and characterization of this channel-like molecule named apoptosis regulated protein 2 (ARP2) associated to a lethal influx of Ca(2+) in Xenopus oocytes. In the present study, LNCaP cells and Chinese hamster ovary cells (CHO cell line) transfected with arp2-cDNA are induced to undergo apoptosis showing an important impact on cell viability and activation of caspases 3 and 7 when compared to serum deprived grown cells and ionomycin treated cells. The subcellular localization of ARP2 in CHO cells undergoing apoptosis was studied using confocal microscopy. While apoptosis progresses, ARP2 initially localized in the peri-nuclear region of cells migrates with time towards the plasma membrane region. Based on the present results and those of our previous studies, the fact that ARP2 constitutes a novel cation channel is supported. Therefore, ARP2 becomes a valuable target to modulate the influx and concentration of calcium in the cytoplasm of epithelial cancer cells showing an apoptotic-resistant phenotype during the onset of an apoptotic event.
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Affiliation(s)
- Jaime Mas-Oliva
- Instituto de Fisiología Celular, Universidad Nacional Autónoma de México, México D.F., México
- División de Investigación, Facultad de Medicina, Universidad Nacional Autónoma de México, México D.F., México
| | - Enrique Navarro-Vidal
- Instituto de Fisiología Celular, Universidad Nacional Autónoma de México, México D.F., México
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Nakamura T, Okada T, Endo M, Kadomatsu T, Taniwaki T, Sei A, Odagiri H, Masuda T, Fujimoto T, Nakamura T, Oike Y, Mizuta H. Angiopoietin-like protein 2 induced by mechanical stress accelerates degeneration and hypertrophy of the ligamentum flavum in lumbar spinal canal stenosis. PLoS One 2014; 9:e85542. [PMID: 24465594 PMCID: PMC3894965 DOI: 10.1371/journal.pone.0085542] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2013] [Accepted: 12/05/2013] [Indexed: 02/06/2023] Open
Abstract
Chronic inflammation and subsequent fibrosis induced by mechanical stress play an important role in ligamentum flavum (LF) hypertrophy and degeneration in patients with lumbar spinal canal stenosis (LSCS). Angiopoietin-like protein 2 (Angptl2) is a chronic inflammatory mediator induced under various pathological conditions and increases the expression of TGF-β1, which is a well-characterized mediator in LF hypertrophy. We investigated whether Angptl2 is induced by mechanical stress, and whether it contributes to LF hypertrophy and degeneration by activating the TGF-β1 signaling cascade. In this study, we investigated human LF tissue and LF fibroblasts isolated from patients who underwent lumbar surgery. We found that Angptl2 was abundantly expressed in fibroblasts of hypertrophied LF tissues at both the mRNA and protein levels. This expression was not only positively correlated with LF thickness and degeneration but also positively correlated with lumbar segmental motion. Our in vitro experiments with fibroblasts from hypertrophied LF tissue revealed that mechanical stretching stress increases the expression and secretion of Angptl2 via activation of calcineurin/NFAT pathways. In hypertrophied LF tissue, expression of TGF-β1 mRNA was also increased and TGF-β1/Smad signaling was activated. Angptl2 expression in LF tissue was positively correlated with the expression of TGF-β1 mRNA, suggesting cooperation between Angptl2 and TGF-β1 in the pathogenesis of LF hypertrophy. In vitro experiments revealed that Angptl2 increased levels of TGF-β1 and its receptors, and also activated TGF-β1/Smad signaling. Mechanical stretching stress increased TGF-β1 mRNA expression, which was partially attenuated by treatment with a calcineurin/NFAT inhibitor or Angptl2 siRNA, indicating that induction of TGF-β1 expression by mechanical stretching stress is partially mediated by Angptl2. We conclude that expression of Angptl2 induced by mechanical stress in LF fibroblasts promotes LF tissue degeneration by activation of TGF-β1/Smad signaling, which results in LF hypertrophy in patients with LSCS.
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Affiliation(s)
- Takayuki Nakamura
- Department of Orthopaedic Surgery, Faculty of Life Sciences, Kumamoto University, Chuo-ku, Kumamoto, Japan
- Department of Molecular Genetics, Graduate School of Medical Sciences, Kumamoto University, Chuo-ku, Kumamoto, Japan
| | - Tatsuya Okada
- Department of Orthopaedic Surgery, Faculty of Life Sciences, Kumamoto University, Chuo-ku, Kumamoto, Japan
- * E-mail:
| | - Motoyoshi Endo
- Department of Molecular Genetics, Graduate School of Medical Sciences, Kumamoto University, Chuo-ku, Kumamoto, Japan
| | - Tsuyoshi Kadomatsu
- Department of Molecular Genetics, Graduate School of Medical Sciences, Kumamoto University, Chuo-ku, Kumamoto, Japan
| | - Takuya Taniwaki
- Department of Orthopaedic Surgery, Faculty of Life Sciences, Kumamoto University, Chuo-ku, Kumamoto, Japan
| | - Akira Sei
- Department of Orthopaedic Surgery, Faculty of Life Sciences, Kumamoto University, Chuo-ku, Kumamoto, Japan
| | - Haruki Odagiri
- Department of Orthopaedic Surgery, Faculty of Life Sciences, Kumamoto University, Chuo-ku, Kumamoto, Japan
- Department of Molecular Genetics, Graduate School of Medical Sciences, Kumamoto University, Chuo-ku, Kumamoto, Japan
| | - Tetsuro Masuda
- Department of Orthopaedic Surgery, Faculty of Life Sciences, Kumamoto University, Chuo-ku, Kumamoto, Japan
- Department of Molecular Genetics, Graduate School of Medical Sciences, Kumamoto University, Chuo-ku, Kumamoto, Japan
| | - Toru Fujimoto
- Department of Orthopaedic Surgery, Faculty of Life Sciences, Kumamoto University, Chuo-ku, Kumamoto, Japan
| | | | - Yuichi Oike
- Department of Molecular Genetics, Graduate School of Medical Sciences, Kumamoto University, Chuo-ku, Kumamoto, Japan
- CREST, Japan Science and Technology Agency, Honcho, Kawaguchi, Saitama, Japan
| | - Hiroshi Mizuta
- Department of Orthopaedic Surgery, Faculty of Life Sciences, Kumamoto University, Chuo-ku, Kumamoto, Japan
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Li Q, Gong W, Yang Z, Lu B, Yang Y, Zhao W, Hu R. Serum Angptl2 levels are independently associated with albuminuria in type 2 diabetes. Diabetes Res Clin Pract 2013; 100:385-90. [PMID: 23602322 DOI: 10.1016/j.diabres.2013.03.028] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/24/2012] [Revised: 02/27/2013] [Accepted: 03/22/2013] [Indexed: 10/26/2022]
Abstract
BACKGROUND Elevated serum Angptl2 levels are positively associated with the development of type 2 diabetes. We investigated whether serum Angptl2 levels are associated with diabetic nephropathy in patients with type 2 diabetes. METHODS Two hundred and thirty patients with type 2 diabetes and 63 healthy controls participated in this cross-sectional study. Subjects with type 2 diabetes were divided into three groups using urinary albumin-to-creatinine ratio (ACR): a normoalbuminuric group (n=57), a microalbuminuric group (n=130) and a macroalbuminuria group (n=43). Serum Angptl2 concentrations were measured by enzyme-linked immunosorbent assay. RESULTS Median serum (interquartile range) Angptl2 levels in control subjects and patients with type 2 diabetes with normoalbuminuria, microalbuminuria and macroalbuminuria were 24.03 (16.3-33.45), 36.14 (27.91-43.07), 44.6 (37.47-49.92), 50.19 (45.95-60.13)ng/ml (p<0.01) respectively. Angptl2 levels correlated with urinary ACR in participants with type 2 diabetes (r=0.38, p<0.01). Significant intercorrelations of Angptl2 were found with age, duration of diabetes, and fasting plasma glucose. After adjustment for significant covariates, albuminuria was still significantly associated with Angptl2 levels in type 2 diabetes (r=0.31, p<0.01). CONCLUSIONS Angptl2 levels are elevated in patients with type 2 diabetes with an independent association between increasing Angptl2 levels and increasing levels of albuminuria. This suggests a possible role of Angptl2 in progressive nephropathy in patients with type 2 diabetes.
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Affiliation(s)
- Qin Li
- Department of Endocrinology, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200011, China
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Kadomatsu T, Uragami S, Akashi M, Tsuchiya Y, Nakajima H, Nakashima Y, Endo M, Miyata K, Terada K, Todo T, Node K, Oike Y. A molecular clock regulates angiopoietin-like protein 2 expression. PLoS One 2013; 8:e57921. [PMID: 23469106 PMCID: PMC3585275 DOI: 10.1371/journal.pone.0057921] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2012] [Accepted: 01/27/2013] [Indexed: 11/18/2022] Open
Abstract
Various physiological and behavioral processes exhibit circadian rhythmicity. These rhythms are usually maintained by negative feedback loops of core clock genes, namely, CLOCK, BMAL, PER, and CRY. Recently, dysfunction in the circadian clock has been recognized as an important foundation for the pathophysiology of lifestyle-related diseases, such as obesity, cardiovascular disease, and some cancers. We have reported that angiopoietin-like protein 2 (ANGPTL2) contributes to the pathogenesis of these lifestyle-related diseases by inducing chronic inflammation. However, molecular mechanisms underlying regulation of ANGPTL2 expression are poorly understood. Here, we assess circadian rhythmicity of ANGPTL2 expression in various mouse tissues. We observed that ANGPTL2 rhythmicity was similar to that of the PER2 gene, which is regulated by the CLOCK/BMAL1 complex. Promoter activity of the human ANGPTL2 gene was significantly induced by CLOCK and BMAL1, an induction markedly attenuated by CRY co-expression. We also identified functional E-boxes in the ANGPTL2 promoter and observed occupancy of these sites by endogenous CLOCK in human osteosarcoma cells. Furthermore, Cry-deficient mice exhibited arrhythmic Angptl2 expression. Taken together, these data suggest that periodic expression of ANGPTL2 is regulated by a molecular clock.
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Affiliation(s)
- Tsuyoshi Kadomatsu
- Department of Molecular Genetics, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
- * E-mail: (TK); (YO)
| | - Shota Uragami
- Department of Molecular Genetics, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - Makoto Akashi
- Research Institute for Time Studies, Yamaguchi University, Yamaguchi, Japan
| | - Yoshiki Tsuchiya
- Department of Neuroscience and Cell Biology, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Hiroo Nakajima
- Department of Radiation Biology and Medical Genetics, Graduate School of Medicine, Osaka University, Osaka, Japan
| | - Yukiko Nakashima
- Department of Molecular Genetics, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - Motoyoshi Endo
- Department of Molecular Genetics, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - Keishi Miyata
- Department of Molecular Genetics, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - Kazutoyo Terada
- Department of Molecular Genetics, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - Takeshi Todo
- Department of Radiation Biology and Medical Genetics, Graduate School of Medicine, Osaka University, Osaka, Japan
| | - Koichi Node
- Department of Cardiovascular and Renal Medicine, Faculty of Medicine, Saga University, Saga, Japan
| | - Yuichi Oike
- Department of Molecular Genetics, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
- * E-mail: (TK); (YO)
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Broxmeyer HE, Srour EF, Cooper S, Wallace CT, Hangoc G, Youn BS. Angiopoietin-like-2 and -3 act through their coiled-coil domains to enhance survival and replating capacity of human cord blood hematopoietic progenitors. Blood Cells Mol Dis 2011; 48:25-9. [PMID: 21983347 DOI: 10.1016/j.bcmd.2011.09.004] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2011] [Accepted: 09/06/2011] [Indexed: 02/06/2023]
Abstract
Several angiopoietin-like (ANGPTL) molecules have been implicated in enhancement of ex-vivo expansion of murine and human (hu) hematopoietic stem cells, but there are no reports on hematopoietic progenitor cells (HPCs). We assessed purified recombinant endotoxin-free hu ANGPTL-2 Coiled-Coil (CC), -3, -3CC, -3 fibrinogen-like domain (FLD), -4, -4CC, -5CC, -6 and -7 for effects on proliferation and survival of HPCs from hu cord blood (CB). None of the ANGPTL molecules stimulated CB HPC proliferation, or enhanced or inhibited colony formation of CB HPC stimulated by various growth factors. However, ANGPTL-2CC, -3, and -3CC significantly enhanced survival of HPC (CFU-GM, BFU-E, CFU-GEMM) subjected to delayed addition of growth factors. Survival enhancing effects of ANGPTL-3 were neutralized by purified anti-ANGPTL-3, but not by anti-ANGPTL-4, -6, or -7. ANGPTL-2CC, -3, and -3CC, but not -4, -6, or -7 also enhanced replating capacity of single CB CFU-GEMM colonies, an estimate of the self-renewal capabilities of HPCs, by greater than 2 fold. Effects of at least ANGPTL-3CC may in part be mediated through phosphorylation of ERK. The ANGPTL molecules did not influence ex-vivo expansion of hu CB CD34(+) cells, alone, or in combination with SCF, TPO, Flt3-ligand, with or without IL-3. Thus, among ANGPTL family members, ANGPTL-2 and -3 had enhancing activities on human HPC survival and replating activity, effects requiring the CC domain of the ANGPTL molecules. This information is of relevance to hu HPC regulation.
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Affiliation(s)
- Hal E Broxmeyer
- Department of Microbiology and Immunology, Indiana University School of Medicine, Indianapolis, IN 46202-5181, USA.
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Kitazawa M, Nagano M, Masumoto KH, Shigeyoshi Y, Natsume T, Hashimoto S. Angiopoietin-like 2, a circadian gene, improves type 2 diabetes through potentiation of insulin sensitivity in mice adipocytes. Endocrinology 2011; 152:2558-67. [PMID: 21586562 DOI: 10.1210/en.2010-1407] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Angiopoietin-like (Angptl)2, a member of the Angptl protein family, is predominantly secreted from adipose tissue and the heart. Here, we demonstrate that the expression of Angptl2 in epididymal adipose tissue of C57BL/6J mice shows pulsatility and circadian rhythmicity and that the rhythmicity was disrupted in high-fat-fed and leptin receptor-deficient diabetic db/db mice with insulin resistance. To investigate whether the reduction in Angptl2 expression was related to the progression of diabetes, we treated db/db mice with recombinant Angptl2 for 4 wk during the peak period of Angptl2 expression in C57BL/6J mice. Angptl2-treated mice showed decreases in plasma glucose, insulin, triglyceride, and fatty acid levels and an increase in plasma adiponectin, a therapeutic regulator of insulin resistance, leading to improvements in glucose tolerance. In cultured adipocytes, recombinant Angptl2 increased adiponectin expression and stimulated insulin sensitivity partially by reducing the levels of tribbles homolog 3, a specific Akt kinase inhibitory protein. Conversely, Angptl2 small interfering RNA reduced adiponectin expression, resulting in insulin resistance. In preadipocytes, treatment with Angptl2 small interfering RNA inhibited differentiation to adipocytes and reduced adiponectin expression. Taken together, our results suggest that replenishment of Angptl2 stimulates insulin sensitivity and improves the type 2 diabetic state.
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Affiliation(s)
- Masashi Kitazawa
- Biomedicinal Information Research Center, National Institute of Advanced Industrial Science and Technology, Tokyo 135-0064, Japan.
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47
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Zheng JY, Zou JJ, Wang WZ, Feng XY, Shi YY, Zhao Y, Jin G, Liu ZM. Tumor necrosis factor-α increases angiopoietin-like protein 2 gene expression by activating Foxo1 in 3T3-L1 adipocytes. Mol Cell Endocrinol 2011; 339:120-9. [PMID: 21501655 DOI: 10.1016/j.mce.2011.04.002] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/13/2010] [Revised: 03/29/2011] [Accepted: 04/01/2011] [Indexed: 01/22/2023]
Abstract
Angiopoietin-like protein 2 (Angptl2) is a key adipocyte-derived inflammatory mediator linking obesity to systemic insulin resistance, which is overexpressed in obesity and related metabolic diseases. However, its regulatory mechanism remains unclear. In this study, we showed that tumor necrosis factor (TNF)-α treatment increased the expression of Angptl2 gene in 3T3-L1 adipocytes. The cloning and sequence analysis of the Angptl2 gene promoter revealed the presence of several putative-binding sites for transcriptional factors, including two IREs. Insulin suppressed Angptl2 mRNA expression in dose-dependent manners, which could be attenuated by a phosphoinositide 3-kinase (PI3K) inhibitor LY294002. The interactions between IRE sites within Angptl2 promoter and forkhead transcription factor Foxo1 were identified by EMSA and ChIP assay. Furthermore, lentivirus-mediated knockdown of Foxo1 expression inhibited the transcriptional activity of Angptl2 promoter and decreased Angptl2 mRNA expression. Finally, TNF-α inhibited Foxo1 phosphorylation and enhanced its transcriptional activity, through which TNF-α increased the expression of Angptl2 in adipocytes. These results suggest that TNF-α up-regulates Angptl2 mRNA expression via PI3K/Foxo1 pathway in 3T3-L1 adipocytes, which may be involved in obesity-induced inflammation and insulin resistance.
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Affiliation(s)
- Jiao-Yang Zheng
- Department of Endocrinology, Changzheng Hospital, Second Military Medical University, Shanghai 200003, China
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48
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Oike Y. [Roles of angiopoietin-like protein 2 (Angptl2) in chronic inflammation and atherosclerotic diseases]. Nihon Rinsho 2011; 69:163-167. [PMID: 21226278] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Recently, the concept has emerged that persistent low-grade activation of proinflammatory pathways in vascular tissues promotes the progression of atherosclerosis and increases the cardiovascular events. Obesity and related metabolic diseases, such as type 2 diabetes, hypertension, and hyperlipidemia are associated with increased risk of cardiovascular disease, the leading cause of death. A major manifestation of obesity-related metabolic diseases in the early phase is systemic low-grade inflammation, suggesting that identification of molecular mechanisms underlying low-grade inflammation could provide clues for development of effective preventive and therapeutic approaches to cardiovascular diseases. In this review, we focus on the roles of Angptl2 in inflammation, and discuss the possibility that Angptl2 could function as a molecular target for prevention and treatment of cardiovascular diseases.
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Affiliation(s)
- Yuichi Oike
- Department of Molecular Genetics, Graduate School of Medical Sciences, Kumamoto University
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49
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Kadomatsu T, Oike Y. [Roles of Angptl2 in obesity-related chronic inflammation/adipose tissue]. Nihon Rinsho 2011; 69 Suppl 1:285-289. [PMID: 21766611] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Affiliation(s)
- Tsuyoshi Kadomatsu
- Department of Molecular Genetics, Graduate School of Medical Sciences, Kumamoto University
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50
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Tahirovic S, Hellal F, Neukirchen D, Hindges R, Garvalov BK, Flynn KC, Stradal TE, Chrostek-Grashoff A, Brakebusch C, Bradke F. Rac1 regulates neuronal polarization through the WAVE complex. J Neurosci 2010; 30:6930-43. [PMID: 20484635 PMCID: PMC6632643 DOI: 10.1523/jneurosci.5395-09.2010] [Citation(s) in RCA: 134] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2009] [Revised: 03/30/2010] [Accepted: 04/03/2010] [Indexed: 11/21/2022] Open
Abstract
Neuronal migration and axon growth, key events during neuronal development, require distinct changes in the cytoskeleton. Although many molecular regulators of polarity have been identified and characterized, relatively little is known about their physiological role in this process. To study the physiological function of Rac1 in neuronal development, we have generated a conditional knock-out mouse, in which Rac1 is ablated in the whole brain. Rac1-deficient cerebellar granule neurons, which do not express other Rac isoforms, showed impaired neuronal migration and axon formation both in vivo and in vitro. In addition, Rac1 ablation disrupts lamellipodia formation in growth cones. The analysis of Rac1 effectors revealed the absence of the Wiskott-Aldrich syndrome protein (WASP) family verprolin-homologous protein (WAVE) complex from the plasma membrane of knock-out growth cones. Loss of WAVE function inhibited axon growth, whereas overexpression of a membrane-tethered WAVE mutant partially rescued axon growth in Rac1-knock-out neurons. In addition, pharmacological inhibition of the WAVE complex effector Arp2/3 also reduced axon growth. We propose that Rac1 recruits the WAVE complex to the plasma membrane to enable actin remodeling necessary for axon growth.
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Affiliation(s)
- Sabina Tahirovic
- Axonal Growth and Regeneration Group, Max Planck Institute of Neurobiology, 82152 Martinsried, Germany
| | - Farida Hellal
- Axonal Growth and Regeneration Group, Max Planck Institute of Neurobiology, 82152 Martinsried, Germany
| | - Dorothee Neukirchen
- Axonal Growth and Regeneration Group, Max Planck Institute of Neurobiology, 82152 Martinsried, Germany
| | - Robert Hindges
- Medical Research Council Centre for Developmental Neurobiology, King's College London, London SE1 1UL, United Kingdom
| | - Boyan K. Garvalov
- Axonal Growth and Regeneration Group, Max Planck Institute of Neurobiology, 82152 Martinsried, Germany
| | - Kevin C. Flynn
- Axonal Growth and Regeneration Group, Max Planck Institute of Neurobiology, 82152 Martinsried, Germany
| | - Theresia E. Stradal
- Signalling and Motility Group, Helmholtz Centre for Infection Research, 38124 Braunschweig, Germany
| | - Anna Chrostek-Grashoff
- Robert M. Berne Cardiovascular Research Center, University of Virginia, Charlottesville, Virginia 22908, and
| | - Cord Brakebusch
- Biotech Research and Innovation Centre, Biomedical Institute, University of Copenhagen, 2200 Copenhagen, Denmark
| | - Frank Bradke
- Axonal Growth and Regeneration Group, Max Planck Institute of Neurobiology, 82152 Martinsried, Germany
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