1
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Long F, Zhong W, Zhao F, Xu Y, Hu X, Jia G, Huang L, Yi K, Wang N, Si H, Wang J, Wang B, Rong Y, Yuan Y, Yuan C, Wang F. DAB2 + macrophages support FAP + fibroblasts in shaping tumor barrier and inducing poor clinical outcomes in liver cancer. Theranostics 2024; 14:4822-4843. [PMID: 39239526 PMCID: PMC11373629 DOI: 10.7150/thno.99046] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2024] [Accepted: 07/31/2024] [Indexed: 09/07/2024] Open
Abstract
Background: Cancer-associated fibroblasts (CAFs) are the key components of the immune barrier in liver cancer. Therefore, gaining a deeper understanding of the heterogeneity and intercellular communication of CAFs holds utmost importance in boosting immunotherapy effectiveness and improving clinical outcomes. Methods: A comprehensive analysis by combing single-cell, bulk, and spatial transcriptome profiling with multiplexed immunofluorescence was conducted to unravel the complexities of CAFs in liver cancer. Results: Through an integrated approach involving 235 liver cancer scRNA-seq samples encompassing over 1.2 million cells, we found that CAFs were particularly increased in hepatocellular carcinoma (HCC) and intrahepatic cholangiocarcinoma (ICC). FAP + fibroblasts were identified as the dominant subtype of CAFs, and which were mainly involved in extracellular matrix organization and angiogenesis. These CAFs were enriched in the tumor boundary of HCC, but diffusely scattered within ICC. The DAB2 + and SPP1 + tumor-associated macrophages (TAMs) reinforce the function of FAP + CAFs through signals such as TGF-β, PDGF, and ADM. Notably, the interaction between DAB2 + TAMs and FAP + CAFs promoted the formation of immune barrier and correlated with poorer patient survival, non-response to immunotherapy in HCC. High FAP and DAB2 immunohistochemical scores predicted shorter survival and higher serum AFP concentration in a local clinical cohort of 90 HCC patients. Furthermore, this communication pattern might be applicable to other solid malignancies as well. Conclusions: The interaction between DAB2 + TAMs and FAP + CAFs appears crucial in shaping the immune barrier. Strategies aimed at disrupting this communication or inhibiting the functions of FAP + CAFs could potentially enhance immunotherapy effectiveness and improve clinical outcomes.
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Affiliation(s)
- Fei Long
- Department of Laboratory Medicine, Zhongnan Hospital of Wuhan University, Wuhan, China
- Center for Single-Cell Omics and Tumor Liquid Biopsy, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - Wei Zhong
- Department of Laboratory Medicine, Zhongnan Hospital of Wuhan University, Wuhan, China
- Center for Single-Cell Omics and Tumor Liquid Biopsy, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - Faming Zhao
- Center for Single-Cell Omics and Tumor Liquid Biopsy, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - Yaqi Xu
- Department of Laboratory Medicine, Zhongnan Hospital of Wuhan University, Wuhan, China
- Center for Single-Cell Omics and Tumor Liquid Biopsy, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - Xin Hu
- Department of Laboratory Medicine, Zhongnan Hospital of Wuhan University, Wuhan, China
- Center for Single-Cell Omics and Tumor Liquid Biopsy, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - Gaihua Jia
- Department of Laboratory Medicine, Zhongnan Hospital of Wuhan University, Wuhan, China
- Center for Single-Cell Omics and Tumor Liquid Biopsy, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - Lanxiang Huang
- Department of Laboratory Medicine, Zhongnan Hospital of Wuhan University, Wuhan, China
- Center for Single-Cell Omics and Tumor Liquid Biopsy, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - Kezhen Yi
- Department of Laboratory Medicine, Zhongnan Hospital of Wuhan University, Wuhan, China
- Center for Single-Cell Omics and Tumor Liquid Biopsy, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - Na Wang
- Department of Laboratory Medicine, Zhongnan Hospital of Wuhan University, Wuhan, China
- Center for Single-Cell Omics and Tumor Liquid Biopsy, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - Huaqi Si
- Department of Laboratory Medicine, Zhongnan Hospital of Wuhan University, Wuhan, China
- Center for Single-Cell Omics and Tumor Liquid Biopsy, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - Jun Wang
- Department of Laboratory Medicine, Wuhan Children's Hospital (Wuhan Maternal and Child Healthcare Hospital), Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Bicheng Wang
- Department of Pathology, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - Yuan Rong
- Center for Single-Cell Omics and Tumor Liquid Biopsy, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - Yufeng Yuan
- Department of Hepatobiliary and Pancreatic Surgery, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - Chunhui Yuan
- Department of Laboratory Medicine, Wuhan Children's Hospital (Wuhan Maternal and Child Healthcare Hospital), Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Fubing Wang
- Department of Laboratory Medicine, Zhongnan Hospital of Wuhan University, Wuhan, China
- Center for Single-Cell Omics and Tumor Liquid Biopsy, Zhongnan Hospital of Wuhan University, Wuhan, China
- Wuhan Research Center for Infectious Diseases and Cancer, Chinese Academy of Medical Sciences, Wuhan, China
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Roy S, Mehta D, Paradkar A, Chovatiya G, Waghmare SK. Dab2 (Disabled-2), an adaptor protein, regulates self-renewal of hair follicle stem cells. Commun Biol 2024; 7:525. [PMID: 38702433 PMCID: PMC11068889 DOI: 10.1038/s42003-024-06047-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2023] [Accepted: 03/13/2024] [Indexed: 05/06/2024] Open
Abstract
Disabled 2 (Dab2), an adaptor protein, is up regulated in the hair follicle stem cells (HFSCs); however, its role in any tissue stem cells has not been studied. In the present study, we have reported that Dab2 conditional knockout (Dab2-cKO) mice exhibited a delay in the HF cycle due to perturbed activation of HFSCs. Further, Dab2-cKO mice showed a reduction in the number of HFSCs and reduced colony forming ability of HFSCs. Dab2-cKO mice showed extended quiescence of HFSCs concomitant with an increased expression of Nfatc1. Dab2-cKO mice showed a decreased expression of anti-aging genes such as Col17a1, decorin, Sirt2 and Sirt7. Dab2-cKO mice did not show full hair coat recovery in aged mice thereby suggesting an accelerated aging process. Overall, we unveil for the first time, the role of Dab2 that regulate activation and self-renewal of HFSCs.
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Affiliation(s)
- Sayoni Roy
- Stem Cell Biology Group, Waghmare Lab, Cancer Research Institute, Advanced Centre for Treatment Research and Education in Cancer (ACTREC), Tata Memorial Centre, Kharghar, Navi Mumbai, 410210, Maharashtra, India
- Homi Bhabha National Institute, Training School Complex, Anushakti Nagar, Mumbai, 400085, India
| | - Darshan Mehta
- Stem Cell Biology Group, Waghmare Lab, Cancer Research Institute, Advanced Centre for Treatment Research and Education in Cancer (ACTREC), Tata Memorial Centre, Kharghar, Navi Mumbai, 410210, Maharashtra, India
- Homi Bhabha National Institute, Training School Complex, Anushakti Nagar, Mumbai, 400085, India
| | - Akshay Paradkar
- Stem Cell Biology Group, Waghmare Lab, Cancer Research Institute, Advanced Centre for Treatment Research and Education in Cancer (ACTREC), Tata Memorial Centre, Kharghar, Navi Mumbai, 410210, Maharashtra, India
- Homi Bhabha National Institute, Training School Complex, Anushakti Nagar, Mumbai, 400085, India
| | - Gopal Chovatiya
- Stem Cell Biology Group, Waghmare Lab, Cancer Research Institute, Advanced Centre for Treatment Research and Education in Cancer (ACTREC), Tata Memorial Centre, Kharghar, Navi Mumbai, 410210, Maharashtra, India
- Homi Bhabha National Institute, Training School Complex, Anushakti Nagar, Mumbai, 400085, India
| | - Sanjeev K Waghmare
- Stem Cell Biology Group, Waghmare Lab, Cancer Research Institute, Advanced Centre for Treatment Research and Education in Cancer (ACTREC), Tata Memorial Centre, Kharghar, Navi Mumbai, 410210, Maharashtra, India.
- Homi Bhabha National Institute, Training School Complex, Anushakti Nagar, Mumbai, 400085, India.
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3
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Qiu L, Sun Y, Ning H, Chen G, Zhao W, Gao Y. The scaffold protein AXIN1: gene ontology, signal network, and physiological function. Cell Commun Signal 2024; 22:77. [PMID: 38291457 PMCID: PMC10826278 DOI: 10.1186/s12964-024-01482-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2023] [Accepted: 01/06/2024] [Indexed: 02/01/2024] Open
Abstract
AXIN1, has been initially identified as a prominent antagonist within the WNT/β-catenin signaling pathway, and subsequently unveiled its integral involvement across a diverse spectrum of signaling cascades. These encompass the WNT/β-catenin, Hippo, TGFβ, AMPK, mTOR, MAPK, and antioxidant signaling pathways. The versatile engagement of AXIN1 underscores its pivotal role in the modulation of developmental biological signaling, maintenance of metabolic homeostasis, and coordination of cellular stress responses. The multifaceted functionalities of AXIN1 render it as a compelling candidate for targeted intervention in the realms of degenerative pathologies, systemic metabolic disorders, cancer therapeutics, and anti-aging strategies. This review provides an intricate exploration of the mechanisms governing mammalian AXIN1 gene expression and protein turnover since its initial discovery, while also elucidating its significance in the regulation of signaling pathways, tissue development, and carcinogenesis. Furthermore, we have introduced the innovative concept of the AXIN1-Associated Phosphokinase Complex (AAPC), where the scaffold protein AXIN1 assumes a pivotal role in orchestrating site-specific phosphorylation modifications through interactions with various phosphokinases and their respective substrates.
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Affiliation(s)
- Lu Qiu
- School of Pharmaceutical Sciences (Shenzhen), Shenzhen Campus of Sun Yat-Sen University, Shenzhen, 518107, China
- School of Life Sciences, Zhengzhou University, Zhengzhou, 450001, China
| | - Yixuan Sun
- School of Pharmaceutical Sciences (Shenzhen), Shenzhen Campus of Sun Yat-Sen University, Shenzhen, 518107, China
| | - Haoming Ning
- School of Pharmaceutical Sciences (Shenzhen), Shenzhen Campus of Sun Yat-Sen University, Shenzhen, 518107, China
| | - Guanyu Chen
- School of Pharmaceutical Sciences (Shenzhen), Shenzhen Campus of Sun Yat-Sen University, Shenzhen, 518107, China
| | - Wenshan Zhao
- School of Life Sciences, Zhengzhou University, Zhengzhou, 450001, China.
| | - Yanfeng Gao
- School of Pharmaceutical Sciences (Shenzhen), Shenzhen Campus of Sun Yat-Sen University, Shenzhen, 518107, China.
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Pavičić I, Rokić F, Vugrek O. Effects of S-Adenosylhomocysteine Hydrolase Downregulation on Wnt Signaling Pathway in SW480 Cells. Int J Mol Sci 2023; 24:16102. [PMID: 38003292 PMCID: PMC10671441 DOI: 10.3390/ijms242216102] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2023] [Revised: 10/31/2023] [Accepted: 11/03/2023] [Indexed: 11/26/2023] Open
Abstract
S-adenosylhomocysteine hydrolase (AHCY) deficiency results mainly in hypermethioninemia, developmental delay, and is potentially fatal. In order to shed new light on molecular aspects of AHCY deficiency, in particular any changes at transcriptome level, we enabled knockdown of AHCY expression in the colon cancer cell line SW480 to simulate the environment occurring in AHCY deficient individuals. The SW480 cell line is well known for elevated AHCY expression, and thereby represents a suitable model system, in particular as AHCY expression is regulated by MYC, which, on the other hand, is involved in Wnt signaling and the regulation of Wnt-related genes, such as the β-catenin co-transcription factor LEF1 (lymphoid enhancer-binding factor 1). We selected LEF1 as a potential target to investigate its association with S-adenosylhomocysteine hydrolase deficiency. This decision was prompted by our analysis of RNA-Seq data, which revealed significant changes in the expression of genes related to the Wnt signaling pathway and genes involved in processes responsible for epithelial-mesenchymal transition (EMT) and cell proliferation. Notably, LEF1 emerged as a common factor in these processes, showing increased expression both on mRNA and protein levels. Additionally, we show alterations in interconnected signaling pathways linked to LEF1, causing gene expression changes with broad effects on cell cycle regulation, tumor microenvironment, and implications to cell invasion and metastasis. In summary, we provide a new link between AHCY deficiency and LEF1 serving as a mediator of changes to the Wnt signaling pathway, thereby indicating potential connections of AHCY expression and cancer cell phenotype, as Wnt signaling is frequently associated with cancer development, including colorectal cancer (CRC).
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Affiliation(s)
| | | | - Oliver Vugrek
- Laboratory for Advanced Genomics, Divison of Molecular Medicine, Institute Ruđer Bošković, Bijenička Cesta 54, 10000 Zagreb, Croatia; (I.P.); (F.R.)
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5
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Šustić I, Racetin A, Vukojević K, Benzon B, Tonkić A, Šundov Ž, Puljiz M, Glavina Durdov M, Filipović N. Expression Pattern of DAB Adaptor Protein 2 in Left- and Right-Side Colorectal Carcinoma. Genes (Basel) 2023; 14:1306. [PMID: 37510211 PMCID: PMC10379130 DOI: 10.3390/genes14071306] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2023] [Revised: 06/17/2023] [Accepted: 06/20/2023] [Indexed: 07/30/2023] Open
Abstract
Left-sided and right-sided colorectal cancer (L-CRC and R-CRC) have relatively different clinical pictures and pathophysiological backgrounds. The aim of this study was to investigate the presence of DAB adapter protein 2 (DAB2) as a potential molecular mechanism that contributes to this diversity in terms of malignancy and responses to therapy. The expression of the suppressor gene DAB2 in colon cancer has already been analyzed, but its significance has not been fully elucidated. Archived samples from 34 patients who underwent colon cancer surgery were included in this study, with 13 patients with low-grade CRC and 21 with high-grade CRC. Twenty of the tumors were R-CRC, while 14 were L-CRC. DAB2 expression was analyzed immunohistochemically in the tumor tissue and the colon resection margin was used as a control. Tumors were divided into L-CRC and R-CRC, with splenic flexure as the cutoff point for each side. The results showed that R-CRC had lower DAB2 protein expression compared to L-CRC (p = 0.01). High-grade tumors had reduced DAB2 expression compared to low-grade tumors (p = 0.02). These results are consistent with the analysis of DAB2 gene expression data that we exported from the TCGA Colon and Rectal Cancer Study (COADREAD). In 736 samples of colon cancer, lower DAB2 gene expression was found in R-CRC compared to L-CRC (p < 0.0001). DAB2 gene expression was significantly higher in the sigmoid colon than in the cecum and ascending colon (p < 0.01). The analysis confirmed a lower expression of the DAB2 in tumors with positive microsatellite instability (p < 0.001). In conclusion, DAB2 has a role in the biological differences between R-CRC and L-CRC and its therapeutic and diagnostic potential needs to be further examined.
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Affiliation(s)
- Ivan Šustić
- Division of Gastroenterology, Department of Internal Medicine, University Hospital of Split, Spinčićeva 1, 21000 Split, Croatia
| | - Anita Racetin
- Department of Anatomy, Histology and Embryology, University of Split School of Medicine, Šoltanska 2, 21000 Split, Croatia
| | - Katarina Vukojević
- Department of Anatomy, Histology and Embryology, University of Split School of Medicine, Šoltanska 2, 21000 Split, Croatia
| | - Benjamin Benzon
- Department of Anatomy, Histology and Embryology, University of Split School of Medicine, Šoltanska 2, 21000 Split, Croatia
| | - Ante Tonkić
- Division of Gastroenterology, Department of Internal Medicine, University Hospital of Split, Spinčićeva 1, 21000 Split, Croatia
- University of Split School of Medicine, Šoltanska 2, 21000 Split, Croatia
| | - Željko Šundov
- Division of Gastroenterology, Department of Internal Medicine, University Hospital of Split, Spinčićeva 1, 21000 Split, Croatia
| | - Mario Puljiz
- Clinical Department of Gynaecologic Oncology, University Hospital for Tumours, Sestre Milosrdnice University Hospital Centre, 10000 Zagreb, Croatia
| | - Merica Glavina Durdov
- Department of Pathology, Forensic Medicine and Cytology, University Hospital of Split, University of Split School of Medicine, Spinčićeva 1, 21000 Split, Croatia
| | - Natalija Filipović
- Department of Anatomy, Histology and Embryology, University of Split School of Medicine, Šoltanska 2, 21000 Split, Croatia
- Laboratory for Experimental Neurocardiology, Department of Anatomy, Histology and Embryology, University of Split School of Medicine, Šoltanska 2, 21000 Split, Croatia
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6
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Price ZK, Lokman NA, Yoshihara M, Kajiyama H, Oehler MK, Ricciardelli C. Disabled-2 ( DAB2): A Key Regulator of Anti- and Pro-Tumorigenic Pathways. Int J Mol Sci 2022; 24:ijms24010696. [PMID: 36614139 PMCID: PMC9821069 DOI: 10.3390/ijms24010696] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2022] [Revised: 12/22/2022] [Accepted: 12/23/2022] [Indexed: 01/03/2023] Open
Abstract
Disabled-2 (DAB2), a key adaptor protein in clathrin mediated endocytosis, is implicated in the regulation of key signalling pathways involved in homeostasis, cell positioning and epithelial to mesenchymal transition (EMT). It was initially identified as a tumour suppressor implicated in the initiation of ovarian cancer, but was subsequently linked to many other cancer types. DAB2 contains key functional domains which allow it to negatively regulate key signalling pathways including the mitogen activated protein kinase (MAPK), wingless/integrated (Wnt) and transforming growth factor beta (TGFβ) pathways. Loss of DAB2 is primarily associated with activation of these pathways and tumour progression, however this review also explores studies which demonstrate the complex nature of DAB2 function with pro-tumorigenic effects. A recent strong interest in microRNAs (miRNA) in cancer has identified DAB2 as a common target. This has reignited an interest in DAB2 research in cancer. Transcriptomics of tumour associated macrophages (TAMs) has also identified a pro-metastatic role of DAB2 in the tumour microenvironment. This review will cover the broad depth literature on the tumour suppressor role of DAB2, highlighting its complex relationships with different pathways. Furthermore, it will explore recent findings which suggest DAB2 has a more complex role in cancer than initially thought.
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Affiliation(s)
- Zoe K. Price
- Discipline of Obstetrics and Gynaecology, Robinson Research Institute, Adelaide Medical School, University of Adelaide, Adelaide, SA 5005, Australia
| | - Noor A. Lokman
- Discipline of Obstetrics and Gynaecology, Robinson Research Institute, Adelaide Medical School, University of Adelaide, Adelaide, SA 5005, Australia
| | - Masato Yoshihara
- Department of Obstetrics and Gynecology, Nagoya University Graduate School of Medicine, Nagoya 464-0813, Japan
| | - Hiroaki Kajiyama
- Department of Obstetrics and Gynecology, Nagoya University Graduate School of Medicine, Nagoya 464-0813, Japan
| | - Martin K. Oehler
- Discipline of Obstetrics and Gynaecology, Robinson Research Institute, Adelaide Medical School, University of Adelaide, Adelaide, SA 5005, Australia
- Department of Gynaecological Oncology, Royal Adelaide Hospital, Adelaide, SA 5000, Australia
| | - Carmela Ricciardelli
- Discipline of Obstetrics and Gynaecology, Robinson Research Institute, Adelaide Medical School, University of Adelaide, Adelaide, SA 5005, Australia
- Correspondence: ; Tel.:+61-08-8313-8255
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7
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The effect of eight weeks of moderate and high intensity aerobic training on the gene expression of Mir-145, Wnt3a and Dab2 in the heart tissue of type 2 diabetic rats. J Diabetes Metab Disord 2021; 20:1597-1604. [PMID: 34900811 DOI: 10.1007/s40200-021-00909-w] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/14/2021] [Accepted: 09/25/2021] [Indexed: 10/20/2022]
Abstract
Purpose Pathological hypertrophy of heart tissue has been attributed to changes in some microRNAs and their target genes in heart tissue. This study intended to study the effects of eight weeks of moderate and high intensity aerobic training (MIT&HIT) on the mRNA of Mir-145, Wnt3a, and Dab2 in heart tissue of type 2 diabetic rats. Methods To implement this experimental research, 60 male Wistar rats were randomly divided into 6 groups, including Healthy-control (HC), Diabetic-control (DC), Moderate intensity training (MIT), Diabetes-MIT (DMIT), high intensity training (HIT) and Diabetes-HIT (DHIT). The aerobic training was conducted with moderate (50-60% VO2max) and high (85-90% VO2max) intensity, 5 days a week, for 8 weeks. The Mir-145, Wnt3a and Dab2 gene expression in the heart tissue samples was measured by Real Time PCR. Data were analyzed by one-way ANOVA and Tukey post hoc test at the P < 0.05. Results Moderate and high intensity aerobic training was associated with non-significant increase in Mir-145 mRNA of Heart tissue in type 2 diabetic rats than the diabetic control group(P < 0.05). Moderate and high intensity aerobic training was associated with significant increase in Wnt3a mRNA (P = 0.001) and significant decrease in Dab-2 mRNA (P = 0.001) of Heart tissue in type 2 diabetic rats than the diabetic control group. The Dab-2 mRNA was significantly lower of heart tissue in the diabetes- high intensity training group than the diabetes- moderate intensity training group (P = 0.001). Conclusion It seems that moderate and high intensity aerobic exercise can help regulate the genes of the physiological hypertrophy pathway of the heart tissue in diabetes.
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8
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Liu Y, Wang Y, Yuan W, Dong F, Zhen F, Liu J, Yang L, Qu X, Yao R. Reelin promotes oligodendrocyte precursors migration via the Wnt/β-catenin signaling pathway. Neurol Res 2021; 43:543-552. [PMID: 33616025 DOI: 10.1080/01616412.2021.1888604] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2020] [Accepted: 02/07/2021] [Indexed: 10/22/2022]
Abstract
Objectives: The extracellular matrix glycoprotein Reelin plays an important role in the development of the central nervous system and is involved in neurogenesis, neuronal polarization and migration. Although it has been reported that Reelin and its receptor are expressed in oligodendrocyte precursors (OPCs), the main functions and possible mechanism of Reelin in OPCs remain unclear.Methods: In this study, immunofluorescence staining was used to detect the expressions of A2B5, PDGFRα, Reelin, VLDLR and Dab1 in OPCs. The expression of p-Dab1 in OPCs which was treated with Reelin at different concentrations was assayed by western blot. Effects of Reelin on the proliferation of OPCs was measured by EdU and CCK-8. Annexin V-FITC/PI assayed the effect of Reelin on the apoptosis of OPCs. Effects of Reelin on the migration ability of OPCs were detected by the scratch test and transwell experiments. Immunoblotting was used to measure the activation of Wnt/β-catenin signaling with Reelin, while transwell experiments were performed to verify the migration of OPCs under the activation of Wnt/β-catenin signaling.Results: Results showed that the receptor of Reelin, very-low-density lipoprotein receptor (VLDLR), and its adaptor protein, Dab1, are highly expressed in A2B5/PDGFRα double-positive OPCs. Recombinant Reelin protein promoted OPCs migration in vitro but had no obvious effects on proliferation or apoptosis. Reelin also promoted the phosphorylation of Dab1 and increased the expression of β-catenin in OPCs. WIKI4, an inhibitor of Wnt/β-catenin signaling, suppressed the migration of OPCs induced by Reelin.Conclusion: The present study indicated that Reelin promotes OPCs migration via the Wnt/β-catenin pathway.
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Affiliation(s)
- Yaping Liu
- Laboratory of National Experimental Teaching and Demonstration Center of Basic Medicine, Xuzhou Medical University, Xuzhou, Jiangsu, PRC
| | - Yuanyuan Wang
- Pediatrics, Nanjing Tongren Hospital, Nanjing, Jiangsu, PRC
| | - Wen Yuan
- Department of Cell Biology and Neurobiology, Xuzhou Key Laboratory of Neurobiology, Xuzhou Medical University, Xuzhou, Jiangsu, PRC
| | - Fuxing Dong
- Department of Cell Biology and Neurobiology, Xuzhou Key Laboratory of Neurobiology, Xuzhou Medical University, Xuzhou, Jiangsu, PRC
| | - Fei Zhen
- Department of Pathology, Hongze District People's Hospital, Huai 'an, Jiangsu, PRC
| | - Jing Liu
- Department of Cell Biology and Neurobiology, Xuzhou Key Laboratory of Neurobiology, Xuzhou Medical University, Xuzhou, Jiangsu, PRC
| | - Lihua Yang
- Department of Cell Biology and Neurobiology, Xuzhou Key Laboratory of Neurobiology, Xuzhou Medical University, Xuzhou, Jiangsu, PRC
| | - Xuebin Qu
- Department of Cell Biology and Neurobiology, Xuzhou Key Laboratory of Neurobiology, Xuzhou Medical University, Xuzhou, Jiangsu, PRC
| | - Ruiqin Yao
- Department of Cell Biology and Neurobiology, Xuzhou Key Laboratory of Neurobiology, Xuzhou Medical University, Xuzhou, Jiangsu, PRC
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9
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Gu Q, Kanungo J. Effect of ketamine on gene expression in zebrafish embryos. J Appl Toxicol 2021; 41:2083-2089. [PMID: 34002392 DOI: 10.1002/jat.4199] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2021] [Revised: 05/03/2021] [Accepted: 05/03/2021] [Indexed: 01/21/2023]
Abstract
Ketamine is an N-methyl-D-aspartate (NMDA) receptor antagonist. Used as an anesthetic, potential neurotoxic and cardiotoxic effects of ketamine in animal models have been reported. The underlying mechanisms of ketamine-induced toxicity are not clear. The zebrafish is an ideal model for toxicity assays because of its predictive capability in chemical testing, which compares well with that of mammalian models. To gain insight into potential mechanisms of ketamine effects, we performed real-time quantitative polymerase chain reaction-based gene expression array analyses. Gene expression analysis was conducted for multiple genes (a total of 84) related to 10 major signaling pathways including the transforming growth factor β (TGFβ), Wingless and Int-1 (Wnt), nuclear factor κ-light-chain-enhancer of activated B cells (NF-κB), Janus kinase/signal transducers and activators of transcription (JAK/STAT), p53, Notch, Hedgehog, peroxisome proliferator-activated receptor (PPAR), oxidative stress, and hypoxia pathways. Our results show that ketamine altered the expression of specific genes related to hypoxia, p53, Wnt, Notch, TGFβ, PPAR, and oxidative stress pathways. Thus, we can further focus on these specific pathways to elucidate the mechanisms by which ketamine elicits a toxic response.
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Affiliation(s)
- Qiang Gu
- Division of Neurotoxicology, National Center for Toxicological Research, U.S. Food and Drug Administration, Jefferson, AR, USA
| | - Jyotshna Kanungo
- Division of Neurotoxicology, National Center for Toxicological Research, U.S. Food and Drug Administration, Jefferson, AR, USA
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Alibardi L. Immunoreactivity for Dab2 and Foxp3 suggests that immune‐suppressive cells are present in the regenerating tail blastema of lizard. ACTA ZOOL-STOCKHOLM 2021. [DOI: 10.1111/azo.12380] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Lorenzo Alibardi
- Comparative Histolab Padova Dipartimento di Biologia University of Bologna Bologna Italy
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11
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Zebardast A, Tehrani SS, Latifi T, Sadeghi F. Critical review of Epstein-Barr virus microRNAs relation with EBV-associated gastric cancer. J Cell Physiol 2021; 236:6136-6153. [PMID: 33507558 DOI: 10.1002/jcp.30297] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2020] [Revised: 12/29/2020] [Accepted: 01/15/2021] [Indexed: 12/24/2022]
Abstract
Epstein-Barr virus (EBV)-associated gastric cancer (EBVaGC) is regarded as the most prevalent malignant tumor triggered by EBV infection. In recent years, increasing attention has been considered to recognize more about the disease process's exact mechanisms. There is accumulating evidence that showing epigenetic modifications play critical roles in the EBVaGC pathogenesis. MicroRNAs (miRNAs), as critical epigenetic modulators, are single-strand short noncoding RNA (length ~ <200 bp), which regulate gene expression through binding to the 3'-untranslated region (3'-UTR) of target RNA transcripts and either degrade or repress their activities. In the latest research on EBV, it was found that this virus could encode miRNAs. Mechanistically, EBV-encoded miRNAs are involved in carcinogenesis and the progression of EBV-associated malignancies. Moreover, these miRNAs implicated in immune evasion, identification of pattern recognition receptors, regulation of lymphocyte activation and lethality, modulation of infected host cell antigen, maintain of EBV infection status, promotion of cell proliferation, invasion and migration, and reduction of apoptosis. As good news, not only has recent data demonstrated the crucial function of EBV-encoded miRNAs in the pathogenesis of EBVaGC, but it has also been revealed that aberrant expression of exosomal miRNAs in EBVaGC has made them biomarkers for detection of EBVaGC. Regarding these substantial characterizes, the critical role of EBV-encoded miRNAs has been a hot topic in research. In this review, we will focus on the multiple mechanisms involved in EBVaGC caused by EBV-encoded miRNAs and briefly discuss their potential application in the clinic as a diagnostic biomarker.
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Affiliation(s)
- Arghavan Zebardast
- Department of Virology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Sadra S Tehrani
- Department of Clinical Biochemistry, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran.,Department of Microbiology, School of Medicine, Babol University of Medical Sciences, Babol, Iran
| | - Tayebeh Latifi
- Department of Virology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Farzin Sadeghi
- Department of Microbiology, School of Medicine, Babol University of Medical Sciences, Babol, Iran
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12
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Ogbu SC, Musich PR, Zhang J, Yao ZQ, Howe PH, Jiang Y. The role of disabled-2 (Dab2) in diseases. Gene 2020; 769:145202. [PMID: 33059028 DOI: 10.1016/j.gene.2020.145202] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2020] [Revised: 09/16/2020] [Accepted: 09/29/2020] [Indexed: 12/16/2022]
Abstract
Disabled-2 (Dab2/DOC-2) is a mitogen-responsive adaptor protein required for multiple cellular functions. It is involved in many signaling pathways and plays an integral role in vesicular uptake and trafficking, modulating immune function, protein-protein interactions, cellular homeostasis and differentiation, oncogenesis, and inflammatory processes in organ systems. It contains domains for binding to NPXY motif-containing and SH3 domain-containing adapter proteins, phosphoinositides, glycoprotein 100 (gp100, or megalin), integrins, clathrin, and myosin VI. However, the molecular mechanism(s) of Dab2's biological function still remain to be elucidated. In this review, we provide an extensive up-to-date understanding of the function of Dab2 and its regulation in cardiovascular diseases, immune disorders, tumorigenesis, and central nervous system disorders.
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Affiliation(s)
- Stella C Ogbu
- Department of Biomedical Sciences, J. H. Quillen College of Medicine, East Tennessee State University, Johnson City, TN 37614, USA
| | - Phillip R Musich
- Department of Biomedical Sciences, J. H. Quillen College of Medicine, East Tennessee State University, Johnson City, TN 37614, USA
| | - Jinyu Zhang
- Department of Biomedical Sciences, J. H. Quillen College of Medicine, East Tennessee State University, Johnson City, TN 37614, USA; Division of Infectious, Inflammatory and Immunologic Diseases, Department of Internal Medicine, Quillen College of Medicine, ETSU, Johnson City, TN 37614, USA
| | - Zhi Q Yao
- Division of Infectious, Inflammatory and Immunologic Diseases, Department of Internal Medicine, Quillen College of Medicine, ETSU, Johnson City, TN 37614, USA
| | - Philip H Howe
- Department of Biochemistry and Molecular Biology, Medical University of South Carolina, Charleston, SC 29425, USA
| | - Yong Jiang
- Department of Biomedical Sciences, J. H. Quillen College of Medicine, East Tennessee State University, Johnson City, TN 37614, USA.
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13
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Marigo I, Trovato R, Hofer F, Ingangi V, Desantis G, Leone K, De Sanctis F, Ugel S, Canè S, Simonelli A, Lamolinara A, Iezzi M, Fassan M, Rugge M, Boschi F, Borile G, Eisenhaure T, Sarkizova S, Lieb D, Hacohen N, Azzolin L, Piccolo S, Lawlor R, Scarpa A, Carbognin L, Bria E, Bicciato S, Murray PJ, Bronte V. Disabled Homolog 2 Controls Prometastatic Activity of Tumor-Associated Macrophages. Cancer Discov 2020; 10:1758-1773. [PMID: 32651166 DOI: 10.1158/2159-8290.cd-20-0036] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2020] [Revised: 06/08/2020] [Accepted: 07/06/2020] [Indexed: 11/16/2022]
Abstract
Tumor-associated macrophages (TAM) are regulators of extracellular matrix (ECM) remodeling and metastatic progression, the main cause of cancer-associated death. We found that disabled homolog 2 mitogen-responsive phosphoprotein (DAB2) is highly expressed in tumor-infiltrating TAMs and that its genetic ablation significantly impairs lung metastasis formation. DAB2-expressing TAMs, mainly localized along the tumor-invasive front, participate in integrin recycling, ECM remodeling, and directional migration in a tridimensional matrix. DAB2+ macrophages escort the invasive dissemination of cancer cells by a mechanosensing pathway requiring the transcription factor YAP. In human lobular breast and gastric carcinomas, DAB2+ TAMs correlated with a poor clinical outcome, identifying DAB2 as potential prognostic biomarker for stratification of patients with cancer. DAB2 is therefore central for the prometastatic activity of TAMs. SIGNIFICANCE: DAB2 expression in macrophages is essential for metastasis formation but not primary tumor growth. Mechanosensing cues, activating the complex YAP-TAZ, regulate DAB2 in macrophages, which in turn controls integrin recycling and ECM remodeling in 3-D tissue matrix. The presence of DAB2+ TAMs in patients with cancer correlates with worse prognosis.This article is highlighted in the In This Issue feature, p. 1611.
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Affiliation(s)
- Ilaria Marigo
- Veneto Institute of Oncology IOV-IRCCS, Padova, Italy.
| | - Rosalinda Trovato
- Department of Medicine, Section of Immunology, University of Verona, Verona, Italy.
| | - Francesca Hofer
- Department of Medicine, Section of Immunology, University of Verona, Verona, Italy
| | | | | | - Kevin Leone
- Veneto Institute of Oncology IOV-IRCCS, Padova, Italy
| | - Francesco De Sanctis
- Department of Medicine, Section of Immunology, University of Verona, Verona, Italy
| | - Stefano Ugel
- Department of Medicine, Section of Immunology, University of Verona, Verona, Italy
| | - Stefania Canè
- Department of Medicine, Section of Immunology, University of Verona, Verona, Italy
| | - Anna Simonelli
- Department of Medicine, Section of Immunology, University of Verona, Verona, Italy
| | - Alessia Lamolinara
- Department of Medicine and Aging Science, Center for Advanced Studies and Technology (CAST), University G. D'Annunzio of Chieti-Pescara, Chieti, Italy
| | - Manuela Iezzi
- Department of Medicine and Aging Science, Center for Advanced Studies and Technology (CAST), University G. D'Annunzio of Chieti-Pescara, Chieti, Italy
| | - Matteo Fassan
- Department of Medicine-DIMED, University of Padova, Padova, Italy
| | - Massimo Rugge
- Department of Medicine-DIMED, University of Padova, Padova, Italy
| | - Federico Boschi
- Department of Computer Science, University of Verona, Verona, Italy
| | - Giulia Borile
- Department of Physics and Astronomy "G. Galilei," University of Padova, Padova, Italy.,Institute of Pediatric Research Città della Speranza, Padova, Italy
| | | | | | - David Lieb
- Broad Institute of MIT and Harvard, Cambridge, Massachusetts
| | - Nir Hacohen
- Broad Institute of MIT and Harvard, Cambridge, Massachusetts
| | - Luca Azzolin
- Department of Molecular Medicine, University of Padova, Padova, Italy
| | - Stefano Piccolo
- Department of Molecular Medicine, University of Padova, Padova, Italy.,IFOM, The FIRC Institute for Molecular Oncology, Padova, Italy
| | - Rita Lawlor
- ARC-Net Centre for Applied Research on Cancer, University and Hospital Trust of Verona, Verona, Italy
| | - Aldo Scarpa
- ARC-Net Centre for Applied Research on Cancer, University and Hospital Trust of Verona, Verona, Italy.,Department of Diagnostic and Public Health, University of Verona, Verona, Italy
| | - Luisa Carbognin
- Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Università Cattolica Del Sacro Cuore, Roma, Italy
| | - Emilio Bria
- Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Università Cattolica Del Sacro Cuore, Roma, Italy
| | - Silvio Bicciato
- Department of Life Sciences, Center for Genome Research, University of Modena and Reggio Emilia, Modena, Italy
| | - Peter J Murray
- Max Planck Institute for Biochemistry, Martinsried, Germany
| | - Vincenzo Bronte
- Department of Medicine, Section of Immunology, University of Verona, Verona, Italy.
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Wang H, Dong S, Liu Y, Ma F, Fang J, Zhang W, Shao S, Shen H, Jin J. DAB2 suppresses gastric cancer migration by regulating the Wnt/β-catenin and Hippo-YAP signaling pathways. Transl Cancer Res 2020; 9:1174-1184. [PMID: 35117462 PMCID: PMC8798574 DOI: 10.21037/tcr.2019.12.96] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2019] [Accepted: 12/17/2019] [Indexed: 01/18/2023]
Abstract
BACKGROUND Disabled-2 (DAB2), a potential tumor suppressor, plays an in important role in cancer development and cellular differentiation. Its lower expression levels have founded in many cancers. In addition, DAB2 is involved in multiple signaling pathways, including TGF-β and Wnt signal pathways. Gastric cancer (GC) is a common gastrointestinal malignant tumor. Nonetheless, the role of DAB2 in GC remains unclear. METHODS Thirty-seven clinical specimens of GC tissues and adjacent non-tumor tissues were examined by immunohistochemistry. Proteins were extracted from two of them to perform Western blot analysis. Then, CMV-MCS-3FLAG-SV40-DAB2 and si-DAB2 were transfected into MGC and SGC cell line, respectively. The migration of GC cells was evaluated by transwell migration assay. And, the expression of migration related proteins was detected by Western blot and immunofluorescence (IF). RESULTS Eighty-six percent (32/37) of patients DAB2 staining was reduced in GC tissues compared to adjacent normal tissues. Further studies showed that in six human GC cell lines, the level of DAB2 expression was lower than normal gastric epithelial cells, and that DAB2 was closely related to cell migration in vitro. In DAB2 silenced cells, the Wnt/β-catenin signaling was increased and the Hippo-YAP pathway was affected. In addition, lower DAB2 level led to nuclear translocation of β-catenin and Yap. CONCLUSIONS The lower expression of DAB2 regulates cell migration in GC via interfering with the Wnt and Hippo signaling pathway. Our findings suggested that DAB2 played an important role in the migration of GC.
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Affiliation(s)
- Hua Wang
- School of Medicine, Jiangsu University, Zhenjiang 212013, China
| | - Surong Dong
- Department of Laboratory Medicine, Taizhou People's Hospital, Taizhou 225300, China
| | - Yun Liu
- School of Medicine, Jiangsu University, Zhenjiang 212013, China
| | - Feng Ma
- Department of Endoscopy Center, China-Japan Union Hospital of Jilin University, Changchun 130033, China
| | - Jian Fang
- School of Medicine, Jiangsu University, Zhenjiang 212013, China
| | - Wentao Zhang
- School of Medicine, Jiangsu University, Zhenjiang 212013, China
| | - Shihe Shao
- School of Medicine, Jiangsu University, Zhenjiang 212013, China
| | - Hongxing Shen
- School of Medicine, Jiangsu University, Zhenjiang 212013, China
| | - Jingpeng Jin
- Department of Endoscopy Center, China-Japan Union Hospital of Jilin University, Changchun 130033, China
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15
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Min K, Kim JY, Lee SK. Epstein-Barr virus miR-BART1-3p suppresses apoptosis and promotes migration of gastric carcinoma cells by targeting DAB2. Int J Biol Sci 2020; 16:694-707. [PMID: 32025216 PMCID: PMC6990914 DOI: 10.7150/ijbs.36595] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2019] [Accepted: 12/18/2019] [Indexed: 12/13/2022] Open
Abstract
Although Epstein-Barr virus (EBV) is known to encode over 40 different miRNAs of its own, the roles of most EBV miRNAs remain unknown. Disabled homolog 2 (DAB2) is a putative tumor suppressor, but its role in gastric carcinoma (GC), especially in EBV-associated GC, needs to be clarified. Our qRT-PCR and mRNA microarray results showed that DAB2 expression was down-regulated in EBV-positive GC cells compared to EBV-negative cells. Four BART miRNAs that might target DAB2 were predicted, and we found, using a luciferase reporter assay, that miR-BART1-3p directly targeted the 3'-UTR of DAB2. The miR-BART1-3p transfection decreased DAB2 expression at both mRNA and protein levels, while transfection of an inhibitor of miR-BART1-3p, miR-BART1-3p(i), increased DAB2 expression. In addition, miR-BART1-3p as well as siDAB2 increased migration and decreased apoptosis. Meanwhile, miR-BART1-3p(i) or pcDNA3.1-DAB2 transfection decreased migration and increased apoptosis in EBV-infected GC cells. Furthermore, decreased migration by miR-BART1-3p(i) was abrogated by co-transfected siDAB2, while decreased migration by miR-BART1-3p(i) was further suppressed by a co-transfected DAB2 over-expression vector. Our data suggest that miR-BART1-3p plays an important role in the tumorigenesis of EBV-associated GC by directly targeting DAB2.
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Affiliation(s)
- Kyoungmi Min
- Department of Medical Life Sciences, Department of Biomedicine & Health Sciences, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Jun Yeob Kim
- Department of Medical Life Sciences, Department of Biomedicine & Health Sciences, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Suk Kyeong Lee
- Department of Medical Life Sciences, Department of Biomedicine & Health Sciences, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
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16
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Endocytic Adaptor Proteins in Health and Disease: Lessons from Model Organisms and Human Mutations. Cells 2019; 8:cells8111345. [PMID: 31671891 PMCID: PMC6912373 DOI: 10.3390/cells8111345] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2019] [Revised: 10/24/2019] [Accepted: 10/25/2019] [Indexed: 12/11/2022] Open
Abstract
Cells need to exchange material and information with their environment. This is largely achieved via cell-surface receptors which mediate processes ranging from nutrient uptake to signaling responses. Consequently, their surface levels have to be dynamically controlled. Endocytosis constitutes a powerful mechanism to regulate the surface proteome and to recycle vesicular transmembrane proteins that strand at the plasma membrane after exocytosis. For efficient internalization, the cargo proteins need to be linked to the endocytic machinery via adaptor proteins such as the heterotetrameric endocytic adaptor complex AP-2 and a variety of mostly monomeric endocytic adaptors. In line with the importance of endocytosis for nutrient uptake, cell signaling and neurotransmission, animal models and human mutations have revealed that defects in these adaptors are associated with several diseases ranging from metabolic disorders to encephalopathies. This review will discuss the physiological functions of the so far known adaptor proteins and will provide a comprehensive overview of their links to human diseases.
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17
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X-ray irradiation induced Disabled-2 gene promoter de-methylation enhances radiosensitivity of non-small-cell lung carcinoma cells. J Exp Clin Cancer Res 2018; 37:315. [PMID: 30547821 PMCID: PMC6295092 DOI: 10.1186/s13046-018-1000-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2018] [Accepted: 12/06/2018] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Disabled-2 (Dab2) is known as a tumor suppressor as well as a Wnt pathway inhibitor. We previously reported that Dab2 was down-regulated due to gene promoter hypermethylation in lung cancer. Here, we aim to study if X-ray irradiation can induce de-methylation of the Dab2 gene and subsequently up-regulate its expression, and also to attempt to suppress the malignant biological behavior of and enhance the radiosensitivity in lung cancer cells with hypermethylation of the Dab2 gene. METHODS Immunostaining was performed to investigate the relationship between Dab2 expression and lung cancer clinicopathological characteristics. Bisulfite sequencing PCR (BSP) was used to evaluate the methylation status of lung cancer cells with or without X-ray treatment. Real-time PCR and western Blot were performed to investigate the expression of Dab2, Wnt pathway factors, DNMTs and methyl CpG binding protein 2 (MeCP2). Colony Formation, matrigel invasion and xenograft experiment were performed to evaluate the malignant biological behavior of lung cancer cells with irradiation. RESULTS The result of immunostaining of Dab2 in lung cancer tissues showed that decreased Dab2 expression was positively correlated with poor differentiation, lymph node metastasis, advanced TNM stage and poor prognosis. X-ray treatment significantly up-regulated Dab2 expression and inhibited Wnt factors in LK2 cells (with hypermethylation of the Dab2 gene promoter, P < 0.05), but not in SPC-A-1 cells (with hypomethylation of the Dab2 gene promoter); however, the effect could be reversed by Dab2 or Axin knockdown (P < 0.05). Decreased expression of DNMT1, DNMT3b and MeCP2 could be detected in both LK2 and SPC-A-1 cells compared to non-irradiated cells (P < 0.05). Both in vitro studies and in vivo xenograft tumor growth demonstrated that X-ray could significantly inhibit the proliferation and invasion of LK2 but not SPC-A-1 cells (P < 0.05). CONCLUSION In general, X-ray-induced up-regulation of Dab2 and inhibition of the Wnt pathway may be mediated by de-methylation of a hypermethylated Dab2 gene promoter. X-ray treatment significantly inhibits proliferation and invasion of lung cancer cells with hypermethylation of the Dab2 gene promoter, but is less effective in lung cancer cells with hypomethylation of the Dab2 gene promoter. These results indicate that the methylation status of the Dab2 gene promoter might be a potential predictor of the radiosensitivity of lung cancer cells.
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18
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Adamson SE, Polanowska-Grabowska R, Marqueen K, Griffiths R, Angdisen J, Breevoort SR, Schulman IG, Leitinger N. Deficiency of Dab2 (Disabled Homolog 2) in Myeloid Cells Exacerbates Inflammation in Liver and Atherosclerotic Plaques in LDLR (Low-Density Lipoprotein Receptor)-Null Mice-Brief Report. Arterioscler Thromb Vasc Biol 2018; 38:1020-1029. [PMID: 29599136 PMCID: PMC5920703 DOI: 10.1161/atvbaha.117.310467] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2016] [Accepted: 03/06/2018] [Indexed: 02/05/2023]
Abstract
OBJECTIVE Inflammatory macrophages promote the development of atherosclerosis. We have identified the adaptor protein Dab2 (disabled homolog 2) as a regulator of phenotypic polarization in macrophages. The absence of Dab2 in myeloid cells promotes an inflammatory phenotype, but the impact of myeloid Dab2 deficiency on atherosclerosis has not been shown. APPROACH AND RESULTS To determine the role of myeloid Dab2 in atherosclerosis, Ldlr-/- mice were reconstituted with either Dab2-positive or Dab2-deficient bone marrow and fed a western diet. Consistent with our previous finding that Dab2 inhibits NFκB (nuclear factor κ-light-chain-enhancer of activated B cells) signaling in macrophages, Ldlr-/- mice reconstituted with Dab2-deficient bone marrow had increased systemic inflammation as evidenced by increased serum IL-6 (interleukin-6) levels and increased inflammatory cytokine expression levels in liver. Serum lipid levels were significantly lower in Ldlr-/- mice reconstituted with Dab2-deficient bone marrow, and further examination of livers from these mice revealed drastically increased inflammatory tissue damage and massive infiltration of immune cells. Surprisingly, the atherosclerotic lesion burden in Ldlr-/- mice reconstituted with Dab2-deficient bone marrow was decreased compared with Ldlr-/- mice reconstituted with wild-type bone marrow. Further analysis of aortic root sections revealed increased macrophage content and evidence of increased apoptosis in lesions from Ldlr-/- mice reconstituted with Dab2-deficient bone marrow but no difference in collagen or α-smooth muscle actin content. CONCLUSIONS Dab2 deficiency in myeloid cells promotes inflammation in livers and atherosclerotic plaques in a mouse model of atherosclerosis. Nevertheless, decreased serum lipids as a result of massive inflammatory liver damage may preclude an appreciable increase in atherosclerotic lesion burden in mice reconstituted with Dab2-deficient bone marrow.
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Affiliation(s)
- Samantha E Adamson
- From the Department of Pharmacology (S.E.A., R.P.-G., K.M., R.G., J.A., S.R.B., I.G.S., N.L.)
- Robert M. Berne Cardiovascular Research Center, University of Virginia, Charlottesville (S.E.A., R.P.-G., R.G., N.L.)
| | - Renata Polanowska-Grabowska
- From the Department of Pharmacology (S.E.A., R.P.-G., K.M., R.G., J.A., S.R.B., I.G.S., N.L.)
- Robert M. Berne Cardiovascular Research Center, University of Virginia, Charlottesville (S.E.A., R.P.-G., R.G., N.L.)
| | - Kathryn Marqueen
- From the Department of Pharmacology (S.E.A., R.P.-G., K.M., R.G., J.A., S.R.B., I.G.S., N.L.)
| | - Rachael Griffiths
- From the Department of Pharmacology (S.E.A., R.P.-G., K.M., R.G., J.A., S.R.B., I.G.S., N.L.)
- Robert M. Berne Cardiovascular Research Center, University of Virginia, Charlottesville (S.E.A., R.P.-G., R.G., N.L.)
| | - Jerry Angdisen
- From the Department of Pharmacology (S.E.A., R.P.-G., K.M., R.G., J.A., S.R.B., I.G.S., N.L.)
| | - Sarah R Breevoort
- From the Department of Pharmacology (S.E.A., R.P.-G., K.M., R.G., J.A., S.R.B., I.G.S., N.L.)
| | - Ira G Schulman
- From the Department of Pharmacology (S.E.A., R.P.-G., K.M., R.G., J.A., S.R.B., I.G.S., N.L.)
| | - Norbert Leitinger
- From the Department of Pharmacology (S.E.A., R.P.-G., K.M., R.G., J.A., S.R.B., I.G.S., N.L.)
- Robert M. Berne Cardiovascular Research Center, University of Virginia, Charlottesville (S.E.A., R.P.-G., R.G., N.L.)
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Aktary Z, Alaee M, Pasdar M. Beyond cell-cell adhesion: Plakoglobin and the regulation of tumorigenesis and metastasis. Oncotarget 2018; 8:32270-32291. [PMID: 28416759 PMCID: PMC5458283 DOI: 10.18632/oncotarget.15650] [Citation(s) in RCA: 53] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2016] [Accepted: 12/16/2016] [Indexed: 12/13/2022] Open
Abstract
Plakoglobin (also known as? -catenin) is a member of the Armadillo family of proteins and a paralog of β -catenin. Plakoglobin is a component of both the adherens junctions and desmosomes, and therefore plays a vital role in the regulation of cell-cell adhesion. Similar to β -catenin, plakoglobin is capable of participating in cell signaling in addition to its role in cell-cell adhesion. In this context, β -catenin has a well-documented oncogenic potential as a component of the Wnt signaling pathway. In contrast, while some studies have suggested a tumor promoting activity of plakoglobin in a cell/malignancy specific context, it generally acts as a tumor/metastasis suppressor. How plakoglobin acts as a growth/metastasis inhibitory protein has remained, until recently, unclear. Recent evidence suggests that plakoglobin may suppress tumorigenesis and metastasis by multiple mechanisms, including the suppression of oncogenic signaling, interactions with various proteins involved in tumorigenesis and metastasis, and the regulation of the expression of genes involved in these processes. This review is primarily focused on various mechanisms by which plakoglobin may inhibit tumorigenesis and metastasis.
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Affiliation(s)
- Zackie Aktary
- Department of Oncology, University of Alberta, Edmonton, Alberta, Canada.,Institut Curie, Orsay, France
| | - Mahsa Alaee
- Department of Oncology, University of Alberta, Edmonton, Alberta, Canada
| | - Manijeh Pasdar
- Department of Oncology, University of Alberta, Edmonton, Alberta, Canada
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20
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Wang WL, Chang WL, Yang HB, Wang YC, Chang IW, Lee CT, Chang CY, Lin JT, Sheu BS. Low disabled-2 expression promotes tumor progression and determines poor survival and high recurrence of esophageal squamous cell carcinoma. Oncotarget 2018; 7:71169-71181. [PMID: 27036032 PMCID: PMC5342070 DOI: 10.18632/oncotarget.8460] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2015] [Accepted: 02/24/2016] [Indexed: 11/25/2022] Open
Abstract
Patients with esophageal squamous cell carcinomas (ESCCs) have poor survival and high recurrence rate, but lack a prognostic biomarker. Disabled-2 (DAB2) is a crucial tumor suppressor, but its roles in ESCCs are uncertain. We investigated whether low DAB2 expression in ESCCs could lead into tumor progression and poor prognosis. Our results found patients with low-DAB2 expression ESCCs had significantly larger tumor size, deeper tumor invasion depth, lymph node metastasis, worse survival, and higher recurrence rate (P<0.05). The Cox-regression model revealed low-DAB2 expression was an independent factor of poor survival (P<0.05), and also of tumor recurrence with the predictive performance superior to clinical TNM stage (P<0.05). Low-DAB2 cancer cells, validated by DAB2 knockdown or over-expression, had higher phosphorylated ERK and migration abilities, which could be suppressed by ERK inhibitor treatment. TGF-β-induced epithelial-to-mesenchymal transition (EMT) only existed in the high-DAB2 cells, and related to worse prognosis of high-DAB2 ESCCs (P<0.05). In conclusion, DAB2 can suppress the ERK signaling, but correlate to have TGF-β-induced EMT in ESCCs. DAB2 expression could be a biomarker to identify patients with worse survival and high recurrence. Our data suggest DAB2 expression can stratify patients in need of aggressive surveillance and with possible benefit from anti-ERK or anti-TGF-β therapies.
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Affiliation(s)
- Wen-Lun Wang
- Institute of Clinical Medicine, National Cheng Kung University Medical Center, Tainan, Taiwan.,Department of Internal Medicine, E-Da Hospital/I-Shou University, Kaohsiung, Taiwan
| | - Wei-Lun Chang
- Institute of Clinical Medicine, National Cheng Kung University Medical Center, Tainan, Taiwan.,Department of Internal Medicine, National Cheng Kung University Hospital, Tainan, Taiwan
| | - Hsiao-Bai Yang
- Department of Pathology, National Cheng Kung University Hospital, Tainan, Taiwan.,Department of Pathology, Ton-Yen General Hospital, Hsin-Chu, Taiwan
| | - Yu-Chi Wang
- Department of Biological Science & Technology, E-Da Hospital/I-Shou University, Kaohsiung, Taiwan
| | - I-Wei Chang
- Department of Pathology, E-Da Hospital/I-Shou University, Kaohsiung, Taiwan
| | - Ching-Tai Lee
- Department of Internal Medicine, E-Da Hospital/I-Shou University, Kaohsiung, Taiwan
| | - Chi-Yang Chang
- Department of Internal Medicine, E-Da Hospital/I-Shou University, Kaohsiung, Taiwan
| | - Jaw-Town Lin
- Department of Internal Medicine, E-Da Hospital/I-Shou University, Kaohsiung, Taiwan
| | - Bor-Shyang Sheu
- Institute of Clinical Medicine, National Cheng Kung University Medical Center, Tainan, Taiwan.,Department of Internal Medicine, National Cheng Kung University Hospital, Tainan, Taiwan
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Howley BV, Howe PH. TGF-beta signaling in cancer: post-transcriptional regulation of EMT via hnRNP E1. Cytokine 2018; 118:19-26. [PMID: 29396052 DOI: 10.1016/j.cyto.2017.12.032] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2017] [Accepted: 12/29/2017] [Indexed: 12/12/2022]
Abstract
The TGFβ signaling pathway is a critical regulator of cancer progression in part through induction of the epithelial to mesenchymal transition (EMT). This process is aberrantly activated in cancer cells, facilitating invasion of the basement membrane, survival in the circulatory system, and dissemination to distant organs. The mechanisms through which epithelial cells transition to a mesenchymal state involve coordinated transcriptional and post-transcriptional control of gene expression. One such mechanism of control is through the RNA binding protein hnRNP E1, which regulates splicing and translation of a cohort of EMT and stemness-associated transcripts. A growing body of evidence indicates a major role for hnRNP E1 in the control of epithelial cell plasticity, especially in the context of carcinoma progression. Here, we review the multiple mechanisms through which hnRNP E1 functions to control EMT and metastatic progression.
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Affiliation(s)
- Breege V Howley
- Department of Biochemistry and Molecular Biology, Medical University of South Carolina, Charleston, SC, USA; Hollings Cancer Center, Medical University of South Carolina, Charleston, SC, USA
| | - Philip H Howe
- Department of Biochemistry and Molecular Biology, Medical University of South Carolina, Charleston, SC, USA; Hollings Cancer Center, Medical University of South Carolina, Charleston, SC, USA.
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22
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Wang BW, Fang WJ, Shyu KG. MicroRNA-145 regulates disabled-2 and Wnt3a expression in cardiomyocytes under hyperglycaemia. Eur J Clin Invest 2018; 48. [PMID: 29178342 DOI: 10.1111/eci.12867] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/29/2016] [Accepted: 11/21/2017] [Indexed: 12/24/2022]
Abstract
AIMS MicroRNA-145 (miR-145) could protect cardiomyocyte apoptosis against oxidative stress and repair infarcted myocardium. Angiotensin II (Ang II), a pro-inflammatory cytokine could modulate myocardial remodelling. However, the role of hyperglycaemia on miR-145 expression in cardiomyocyte or diabetes is not known. The effect of Ang II on miR-145 expression under hyperglycaemia in cardiomyocytes remains unknown. We sought to investigate the effect of hyperglycaemia and Ang II on miR-145 expression in cardiomyocytes. METHODS Rat cardiomyocytes were cultured under high glucose concentration (25 mmol/L), and streptozotocin-induced diabetic rats were established. TaqMan® MicroRNA real-time quantitative assay was used to quantitate miR-145. RESULTS Sustained high glucose concentration (hyperglycaemia) significantly decreased miR-145 expression in cardiomyocytes. Hyperglycaemia significantly increased Ang II mRNA expression and secretion from rat cardiomyocytes. Ang II suppressed miR-145 expression in cardiomyocytes. Hyperglycaemia increased Dab2 and decreased Wnt3a/ß-catenin expression in cardiomyocytes. Repression of miR-145 expression by Ang II resulted in increased Dab2 and decreased Wnt3a and ß-catenin expression under hyperglycaemia. In contrast, overexpression of miR-145 significantly decreased Dab2 mRNA and protein expression, whereas the mRNA and protein levels for Wnt3a and ß-catenin were significantly reduced in left ventricular myocardium from 5 days to 28 days in diabetic rats. The protein expression patterns of Dab2 and Wnt3a/ß-catenin in left ventricular myocardium of diabetic rats could be reversed upon treatment with valsartan. CONCLUSIONS Ang II downregulates miR-145 to regulate Dab2 and Wnt3a/ß-catenin expression in cardiomyocytes under high glucose concentration. Ang II plays a critical role in the regulation of miR-145 in cardiomyocytes under hyperglycaemic conditions.
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Affiliation(s)
- Bao-Wei Wang
- Department of Medical Education and Research, Shin Kong Wu Ho-Su Memorial Hospital, Taipei, Taiwan
| | - Wei-Jen Fang
- Department of Medical Education and Research, Shin Kong Wu Ho-Su Memorial Hospital, Taipei, Taiwan
| | - Kou-Gi Shyu
- Division of Cardiology, Shin Kong Wu Ho-Su Memorial Hospital, Taipei, Taiwan
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23
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Tian X, Zhang Z. miR-191/DAB2 axis regulates the tumorigenicity of estrogen receptor-positive breast cancer. IUBMB Life 2017; 70:71-80. [DOI: 10.1002/iub.1705] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2017] [Accepted: 12/02/2017] [Indexed: 12/28/2022]
Affiliation(s)
- Xinxin Tian
- Tianjin International Joint Academy of Biomedicine (TJAB); Tianjin People's Republic of China
- Department of Biochemistry and Biophysics; Texas A&M University and Texas AgriLife Research; College Station TX USA
| | - Zhiqian Zhang
- Tianjin International Joint Academy of Biomedicine (TJAB); Tianjin People's Republic of China
- State Key Laboratory of Medicinal Chemical Biology; Nankai University; Tianjin People's Republic of China
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24
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Vuong NH, Salah Salah O, Vanderhyden BC. 17β-Estradiol sensitizes ovarian surface epithelium to transformation by suppressing Disabled-2 expression. Sci Rep 2017; 7:16702. [PMID: 29196616 PMCID: PMC5711839 DOI: 10.1038/s41598-017-16219-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2017] [Accepted: 11/07/2017] [Indexed: 01/06/2023] Open
Abstract
Estrogen replacement therapy increases the risk of human ovarian cancer and exogenous estradiol accelerates the onset of ovarian cancer in mouse models. This study uses primary cultures of mouse ovarian surface epithelium (OSE) to demonstrate that one possible mechanism by which estrogen accelerates the initiation of ovarian cancer is by up-regulation of microRNA-378 via the ESR1 pathway to result in the down-regulation of a tumour suppressor called Disabled-2 (Dab2). Estrogen suppression of Dab2 was reproducible in vivo and across many cell types including mouse oviductal epithelium and primary cultures of human ovarian cancer cells. Suppression of Dab2 resulted in increased proliferation, loss of contact inhibition, morphological dysplasia, and resistance to oncogene-induced senescence - all factors that can sensitize OSE to transformation. Given that DAB2 is highly expressed in healthy human OSE and is absent in the majority of ovarian tumours, this study has taken the first steps to provide a mechanistic explanation for how estrogen therapy may play a role in the initiation of ovarian cancer.
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MESH Headings
- Adaptor Proteins, Signal Transducing
- Adaptor Proteins, Vesicular Transport/biosynthesis
- Adaptor Proteins, Vesicular Transport/genetics
- Animals
- Apoptosis Regulatory Proteins
- Carcinoma, Ovarian Epithelial/chemically induced
- Carcinoma, Ovarian Epithelial/genetics
- Carcinoma, Ovarian Epithelial/metabolism
- Carcinoma, Ovarian Epithelial/pathology
- Cell Transformation, Neoplastic/chemically induced
- Cell Transformation, Neoplastic/genetics
- Cell Transformation, Neoplastic/metabolism
- Cell Transformation, Neoplastic/pathology
- Epithelial Cells/metabolism
- Epithelial Cells/pathology
- Epithelium/metabolism
- Epithelium/pathology
- Estradiol/adverse effects
- Estradiol/pharmacology
- Female
- Humans
- Mice
- Mice, Knockout
- Ovarian Neoplasms/chemically induced
- Ovarian Neoplasms/genetics
- Ovarian Neoplasms/metabolism
- Ovarian Neoplasms/pathology
- Ovary/metabolism
- Ovary/pathology
- Tumor Suppressor Proteins/biosynthesis
- Tumor Suppressor Proteins/genetics
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Affiliation(s)
- Nhung H Vuong
- Department of Cellular and Molecular Medicine, University of Ottawa, Ottawa, Canada
- Cancer Therapeutics Program, Ottawa Hospital Research Institute, Ottawa, Canada
| | - Omar Salah Salah
- Cancer Therapeutics Program, Ottawa Hospital Research Institute, Ottawa, Canada
| | - Barbara C Vanderhyden
- Department of Cellular and Molecular Medicine, University of Ottawa, Ottawa, Canada.
- Cancer Therapeutics Program, Ottawa Hospital Research Institute, Ottawa, Canada.
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25
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Finkielstein CV, Capelluto DGS. Disabled-2: A modular scaffold protein with multifaceted functions in signaling. Bioessays 2017; 38 Suppl 1:S45-55. [PMID: 27417122 DOI: 10.1002/bies.201670907] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2015] [Revised: 07/08/2015] [Accepted: 07/12/2015] [Indexed: 12/14/2022]
Abstract
Disabled-2 (Dab2) is a multimodular scaffold protein with signaling roles in the domains of cell growth, trafficking, differentiation, and homeostasis. Emerging evidences place Dab2 as a novel modulator of cell-cell interaction; however, its mode of action has remained largely elusive. In this review, we highlight the relevance of Dab2 function in cell signaling and development and provide the most recent and comprehensive analysis of Dab2's action as a mediator of homotypical and heterotypical interactions. Accordingly, Dab-2 controls the extent of platelet aggregation through various motifs within its N-terminus. Dab2 interacts with the cytosolic tail of the integrin receptor blocking inside-out signaling, whereas extracellular Dab2 competes with fibrinogen for integrin αIIb β3 receptor binding and, thus, modulates outside-in signaling. An additional level of regulation results from Dab2's association with cell surface lipids, an event that defines the extent of cell-cell interactions. As a multifaceted regulator, Dab2 acts as a mediator of endocytosis through its association with the [FY]xNPx[YF] motifs of internalized cell surface receptors, phosphoinositides, and clathrin. Other emerging roles of Dab2 include its participation in developmental mechanisms required for tissue formation and in modulation of immune responses. This review highlights the various novel mechanisms by which Dab2 mediates an array of signaling events with vast physiological consequences.
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Affiliation(s)
- Carla V Finkielstein
- Integrated Cellular Responses Laboratory, Department of Biological Sciences, Virginia Bioinformatics Institute, Virginia Tech, Blacksburg, VA, USA
| | - Daniel G S Capelluto
- Protein Signaling Domains Laboratory, Department of Biological Sciences, Virginia Bioinformatics Institute, Virginia Tech, Blacksburg, VA, USA
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26
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Banos G, Bramis G, Bush SJ, Clark EL, McCulloch MEB, Smith J, Schulze G, Arsenos G, Hume DA, Psifidi A. The genomic architecture of mastitis resistance in dairy sheep. BMC Genomics 2017; 18:624. [PMID: 28814268 PMCID: PMC5559839 DOI: 10.1186/s12864-017-3982-1] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2017] [Accepted: 08/01/2017] [Indexed: 02/06/2023] Open
Abstract
Background Mastitis is the most prevalent disease in dairy sheep with major economic, hygienic and welfare implications. The disease persists in all dairy sheep production systems despite the implementation of improved management practises. Selective breeding for enhanced mastitis resistance may provide the means to further control the disease. In the present study, we investigated the genetic architecture of four mastitis traits in dairy sheep. Individual animal records for clinical mastitis occurrence and three mastitis indicator traits (milk somatic cell count, total viable bacterial count in milk and the California mastitis test) were collected monthly throughout lactation for 609 ewes of the Greek Chios breed. All animals were genotyped with a custom-made 960-single nucleotide polymorphism (SNP) DNA array based on markers located in quantitative trait loci (QTL) regions for mastitis resistance previously detected in three other distinct dairy sheep populations. Results Heritable variation and strong positive genetic correlations were estimated for clinical mastitis occurrence and the three mastitis indicator traits. SNP markers significantly associated with these mastitis traits were confirmed on chromosomes 2, 3, 5, 16 and 19. We identified pathways, molecular interaction networks and functional gene clusters for mastitis resistance. Candidate genes within the detected regions were identified based upon analysis of an ovine transcriptional atlas and transcriptome data derived from milk somatic cells. Relevant candidate genes implicated in innate immunity included SOCS2, CTLA4, C6, C7, C9, PTGER4, DAB2, CARD6, OSMR, PLXNC1, IDH1, ICOS, FYB, and LYFR. Conclusions The results confirmed the presence of animal genetic variability in mastitis resistance and identified genomic regions associated with specific mastitis traits in the Chios sheep. The conserved genetic architecture of mastitis resistance between distinct dairy sheep breeds suggests that across-breed selection programmes would be feasible. Electronic supplementary material The online version of this article (doi:10.1186/s12864-017-3982-1) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- G Banos
- The Roslin Institute and Royal (Dick) School of Veterinary Studies, University of Edinburgh, Easter Bush, Midlothian, EH25 9RG, UK.,Scotland's Rural College, Edinburgh, Easter Bush, Midlothian, EH25 9RG, UK.,School of Veterinary Medicine, Aristotle University of Thessaloniki, 54124, Thessaloniki, Greece
| | - G Bramis
- School of Veterinary Medicine, Aristotle University of Thessaloniki, 54124, Thessaloniki, Greece
| | - S J Bush
- The Roslin Institute and Royal (Dick) School of Veterinary Studies, University of Edinburgh, Easter Bush, Midlothian, EH25 9RG, UK
| | - E L Clark
- The Roslin Institute and Royal (Dick) School of Veterinary Studies, University of Edinburgh, Easter Bush, Midlothian, EH25 9RG, UK
| | - M E B McCulloch
- The Roslin Institute and Royal (Dick) School of Veterinary Studies, University of Edinburgh, Easter Bush, Midlothian, EH25 9RG, UK
| | - J Smith
- The Roslin Institute and Royal (Dick) School of Veterinary Studies, University of Edinburgh, Easter Bush, Midlothian, EH25 9RG, UK
| | - G Schulze
- School of Informatics, University of Bergen, 5008, Bergen, Norway
| | - G Arsenos
- School of Veterinary Medicine, Aristotle University of Thessaloniki, 54124, Thessaloniki, Greece
| | - D A Hume
- The Roslin Institute and Royal (Dick) School of Veterinary Studies, University of Edinburgh, Easter Bush, Midlothian, EH25 9RG, UK
| | - A Psifidi
- The Roslin Institute and Royal (Dick) School of Veterinary Studies, University of Edinburgh, Easter Bush, Midlothian, EH25 9RG, UK. .,Royal Veterinary College, University of London, AL9 7TA, Hatfield, UK.
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27
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Discovery of microRNAs during early spermatogenesis in chicken. PLoS One 2017; 12:e0177098. [PMID: 28531200 PMCID: PMC5439670 DOI: 10.1371/journal.pone.0177098] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2017] [Accepted: 04/21/2017] [Indexed: 12/01/2022] Open
Abstract
Spermatogenesis is a complex process that involves many elements. However, until now, little is known at the molecular level about spermatogenesis in poultry. Here we investigated microRNAs and their target genes that may be involved in germ cell development and spermatogonial in chicken. We used next-generation sequencing to analyze miRNA expression profiles in three types of germline cells: primordial germ cells (PGCs), spermatogonial stem cells (SSCs), and spermatogonia (Sp) during early stage of spermatogenesis. After validated the candidate miRNAs and corresponding genes’ expression in three types of cells, we found 15 miRNAs that were enriched 21 target genes that may be involved in spermatogenesis. Among the enriched miRNAs, miR-202-5p/3p were up-regulated in the Sp library and down-regulated in the PGCs library. Through RT-qPCR and Dual-Luciferase reporter assay, we confirmed that miR-202-5p bind to LIMK2 and involved in germ cell development. Collectively, we firstly discover the novel miRNAs, like miR-202-5p, and its related genes and pathways, expressed during the early spermatogonial stage in chicken, which will provide new clues for deciphering the molecular mechanism of the miRNAs regulating germline stem cell differentiation and spermatogenesis in chicken.
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28
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Tao W, Moore R, Smith ER, Xu XX. Endocytosis and Physiology: Insights from Disabled-2 Deficient Mice. Front Cell Dev Biol 2016; 4:129. [PMID: 27933291 PMCID: PMC5122593 DOI: 10.3389/fcell.2016.00129] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2016] [Accepted: 10/27/2016] [Indexed: 01/29/2023] Open
Abstract
Disabled-2 (Dab2) is a clathrin and cargo binding endocytic adaptor protein, and cell biology studies revealed that Dab2 plays a role in cellular trafficking of a number of transmembrane receptors and signaling proteins. A PTB/PID domain located in the N-terminus of Dab2 binds the NPXY motif(s) present at the cytoplasmic tails of certain transmembrane proteins/receptors. The membrane receptors reported to bind directly to Dab2 include LDL receptor and its family members LRP1 and LRP2 (megalin), growth factor receptors EGFR and FGFR, and the cell adhesion receptor beta1 integrin. Dab2 also serves as an adaptor in signaling pathways. Particularly, Dab2 facilitates the endocytosis of the Ras activating Grb2/Sos1 signaling complex, controls its disassembly, and thereby regulates the Ras/MAPK signaling pathway. Cellular analyses have suggested several diverse functions for the widely expressed proteins, and Dab2 is also considered a tumor suppressor, as loss or reduced expression is found in several cancer types. Dab2 null mutant mice were generated and investigated to determine if the findings from cellular studies might be important and relevant in intact animals. Dab2 conditional knockout mice mediated through a Sox2-Cre transgene have no obvious developmental defects and have a normal life span despite that the Dab2 protein is essentially absent in the mutant mice. The conditional knockout mice were grossly normal, though more recent investigation of the Dab2-deficient mice revealed several phenotypes, which can be accounted for by several previously suggested mechanisms. The studies of mutant mice established that Dab2 plays multiple physiological roles through its endocytic functions and modulation of signal pathways.
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Affiliation(s)
- Wensi Tao
- Sylvester Comprehensive Cancer Center and Department of Cell Biology, Graduate Program in Cell and Developmental Biology, University of Miami School of Medicine Miami, FL, USA
| | - Robert Moore
- Sylvester Comprehensive Cancer Center and Department of Cell Biology, Graduate Program in Cell and Developmental Biology, University of Miami School of Medicine Miami, FL, USA
| | - Elizabeth R Smith
- Sylvester Comprehensive Cancer Center and Department of Cell Biology, Graduate Program in Cell and Developmental Biology, University of Miami School of Medicine Miami, FL, USA
| | - Xiang-Xi Xu
- Sylvester Comprehensive Cancer Center and Department of Cell Biology, Graduate Program in Cell and Developmental Biology, University of Miami School of Medicine Miami, FL, USA
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29
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Dworschak GC, Crétolle C, Hilger A, Engels H, Korsch E, Reutter H, Ludwig M. Comprehensive review of the duplication 3q syndrome and report of a patient with Currarino syndrome and de novo duplication 3q26.32-q27.2. Clin Genet 2016; 91:661-671. [PMID: 27549440 DOI: 10.1111/cge.12848] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2016] [Revised: 08/16/2016] [Accepted: 08/17/2016] [Indexed: 12/19/2022]
Abstract
Partial duplications of the long arm of chromosome 3, dup(3q), are a rare but well-described condition, sharing features of Cornelia de Lange syndrome. Around two thirds of cases are derived from unbalanced translocations, whereas pure dup(3q) have rarely been reported. Here, we provide an extensive review of the literature on dup(3q). This search revealed several patients with caudal malformations and anomalies, suggesting that caudal malformations or anomalies represent an inherent phenotypic feature of dup(3q). In this context, we report a patient with a pure de novo duplication 3q26.32-q27.2. The patient had the clinical diagnosis of Currarino syndrome (CS) (characterized by the triad of sacral anomalies, anorectal malformations and a presacral mass) and additional features, frequently detected in patients with a dup(3q). Mutations within the MNX1 gene were found to be causative in CS but no MNX1 mutation could be detected in our patient. Our comprehensive search for candidate genes located in the critical region of the duplication 3q syndrome, 3q26.3-q27, revealed a so far neglected phenotypic overlap of dup(3q) and the Pierpont syndrome, associated with a mutation of the TBL1XR1 gene on 3q26.32.
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Affiliation(s)
- G C Dworschak
- Institute of Human Genetics, University of Bonn, Bonn, Germany.,Department of Pediatrics, Children's Hospital, University of Bonn, Bonn, Germany
| | - C Crétolle
- Department of Pediatric Surgery, Paris Descartes University, Paris, France.,National Reference Centre for Rare Diseases on Anorectal Malformations and Rare Pelvic Anomalies, Necker-Enfants Malades Hospital, Paris Descartes University, Paris, France
| | - A Hilger
- Institute of Human Genetics, University of Bonn, Bonn, Germany
| | - H Engels
- Institute of Human Genetics, University of Bonn, Bonn, Germany
| | - E Korsch
- Clinic for Pediatric Diseases, Kliniken der Stadt Köln GmbH, Cologne, Germany
| | - H Reutter
- Institute of Human Genetics, University of Bonn, Bonn, Germany.,Department of Neonatology and Pediatric Intensive Care, Children's Hospital, University of Bonn, Bonn, Germany
| | - M Ludwig
- Department of Clinical Chemistry and Clinical Pharmacology, University of Bonn, Bonn, Germany
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30
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Abstract
Multiple functions of platelets in various physiological and pathological conditions have prompted considerable attention on understanding how platelets are generated and activated. Of the adaptor proteins that are expressed in megakaryocytes and platelets, Disabled-2 (Dab2) has been demonstrated in the past decades as a key regulator of platelet signaling. Dab2 has two alternative splicing isoforms p82 and p59. However, the mode of Dab2’s action remains to be clearly defined. In this review, we highlight the current understanding of Dab2 expression and function in megakaryocytic differentiation, platelet activation and integrin signaling. Accordingly, Dab2 is upregulated when the human K562 cells, human CD34+ hematopoietic stem cells, and murine embryonic stem cells were undergone megakaryocytic differentiation. Appropriate level of Dab2 expression is essential for fate determination of mesodermal and megakaryocytic differentiation. Dab2 is also shown to regulate cell-cell and cell-fibrinogen adhesion, integrin αIIbβ3 activation, fibrinogen uptake, and intracellular signaling of the megakaryocytic cells. In human platelets, p82 is the sole Dab2 isoform present in the cytoplasm and α-granules. Dab2 is released from the α-granules and forms two pools of Dab2 on the outer surface of the platelet plasma membrane, one at the sulfatide-bound and the other at integrin αIIbβ3-bound forms. The balance between these two pools of Dab2 controls the extent of clotting reaction, platelet-fibrinogen interactions and outside-in signaling. In murine platelets, p59 is the only Dab2 isoform and is required for platelet aggregation, fibrinogen uptake, RhoA-ROCK activation, adenosine diphosphate release and integrin αIIbβ3 activation stimulated by low concentration of thrombin. As a result, the bleeding time is prolonged and thrombus formation is impaired for the megakaryocyte lineage-restricted Dab2 deficient mouse. Although discrepancies of Dab2 function and isoform expression are noted between human and murine platelets, the studies up-to-date define Dab2 playing a pivotal role in integrin signaling and platelet activation. With the new tools such as CRISPR and TALEN in the generation of genetically modified animals, the progress in gaining new insights into the functions of Dab2 in megakaryocyte and platelet biology is expected to accelerate.
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Affiliation(s)
- Hui-Ju Tsai
- Department of Medical Biotechnology and Laboratory Science, Collage of Medicine, Chang Gung University, Kweishan, Taoyuan 333, Taiwan, Republic of China ; Molecular Medicine Research Center, Chang Gung University, Kweishan, Taoyuan 333, Taiwan, Republic of China
| | - Ching-Ping Tseng
- Department of Medical Biotechnology and Laboratory Science, Collage of Medicine, Chang Gung University, Kweishan, Taoyuan 333, Taiwan, Republic of China ; Molecular Medicine Research Center, Chang Gung University, Kweishan, Taoyuan 333, Taiwan, Republic of China ; Graduate Institute of Biomedical Science, Collage of Medicine, Chang Gung University, Kweishan, Taoyuan 333, Taiwan, Republic of China ; Department of Laboratory Medicine, Chang Gung Memorial Hospital, Kweishan, Taoyuan 333, Taiwan, Republic of China
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31
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Pathways on demand: automated reconstruction of human signaling networks. NPJ Syst Biol Appl 2016; 2:16002. [PMID: 28725467 PMCID: PMC5516854 DOI: 10.1038/npjsba.2016.2] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2015] [Revised: 11/26/2015] [Accepted: 11/27/2015] [Indexed: 12/13/2022] Open
Abstract
Signaling pathways are a cornerstone of systems biology. Several databases store high-quality representations of these pathways that are amenable for automated analyses. Despite painstaking and manual curation, these databases remain incomplete. We present PATHLINKER, a new computational method to reconstruct the interactions in a signaling pathway of interest. PATHLINKER efficiently computes multiple short paths from the receptors to transcriptional regulators (TRs) in a pathway within a background protein interaction network. We use PATHLINKER to accurately reconstruct a comprehensive set of signaling pathways from the NetPath and KEGG databases. We show that PATHLINKER has higher precision and recall than several state-of-the-art algorithms, while also ensuring that the resulting network connects receptor proteins to TRs. PATHLINKER’s reconstruction of the Wnt pathway identified CFTR, an ABC class chloride ion channel transporter, as a novel intermediary that facilitates the signaling of Ryk to Dab2, which are known components of Wnt/β-catenin signaling. In HEK293 cells, we show that the Ryk–CFTR–Dab2 path is a novel amplifier of β-catenin signaling specifically in response to Wnt 1, 2, 3, and 3a of the 11 Wnts tested. PATHLINKER captures the structure of signaling pathways as represented in pathway databases better than existing methods. PATHLINKER’s success in reconstructing pathways from NetPath and KEGG databases point to its applicability for complementing manual curation of these databases. PATHLINKER may serve as a promising approach for prioritizing proteins and interactions for experimental study, as illustrated by its discovery of a novel pathway in Wnt/β-catenin signaling. Our supplementary website at http://bioinformatics.cs.vt.edu/~murali/supplements/2016-sys-bio-applications-pathlinker/ provides links to the PATHLINKER software, input datasets, PATHLINKER reconstructions of NetPath pathways, and links to interactive visualizations of these reconstructions on GraphSpace.
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32
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Adamson SE, Griffiths R, Moravec R, Senthivinayagam S, Montgomery G, Chen W, Han J, Sharma PR, Mullins GR, Gorski SA, Cooper JA, Kadl A, Enfield K, Braciale TJ, Harris TE, Leitinger N. Disabled homolog 2 controls macrophage phenotypic polarization and adipose tissue inflammation. J Clin Invest 2016; 126:1311-22. [PMID: 26927671 DOI: 10.1172/jci79590] [Citation(s) in RCA: 58] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2014] [Accepted: 01/14/2016] [Indexed: 02/06/2023] Open
Abstract
Acute and chronic tissue injury results in the generation of a myriad of environmental cues that macrophages respond to by changing their phenotype and function. This phenotypic regulation is critical for controlling tissue inflammation and resolution. Here, we have identified the adaptor protein disabled homolog 2 (DAB2) as a regulator of phenotypic switching in macrophages. Dab2 expression was upregulated in M2 macrophages and suppressed in M1 macrophages isolated from both mice and humans, and genetic deletion of Dab2 predisposed macrophages to adopt a proinflammatory M1 phenotype. In mice with myeloid cell-specific deletion of Dab2 (Dab2fl/fl Lysm-Cre), treatment with sublethal doses of LPS resulted in increased proinflammatory gene expression and macrophage activation. Moreover, chronic high-fat feeding exacerbated adipose tissue inflammation, M1 polarization of adipose tissue macrophages, and the development of insulin resistance in DAB2-deficient animals compared with controls. Mutational analyses revealed that DAB2 interacts with TNF receptor-associated factor 6 (TRAF6) and attenuates IκB kinase β-dependent (IKKβ-dependent) phosphorylation of Ser536 in the transactivation domain of NF-κB p65. Together, these findings reveal that DAB2 is critical for controlling inflammatory signaling during phenotypic polarization of macrophages and suggest that manipulation of DAB2 expression and function may hold therapeutic potential for the treatment of acute and chronic inflammatory disorders.
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33
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WEI TIANLI, ZHANG NANNAN, GUO ZHIBIN, CHI FENG, SONG YAN, ZHU XIKE. Wnt4 signaling is associated with the decrease of proliferation and increase of apoptosis during age-related thymic involution. Mol Med Rep 2015; 12:7568-76. [DOI: 10.3892/mmr.2015.4343] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2014] [Accepted: 09/01/2015] [Indexed: 11/06/2022] Open
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34
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Aberrant Hypermethylation at Sites -86 to 226 of DAB2 Gene in Non-Small Cell Lung Cancer. Am J Med Sci 2015; 349:425-31. [DOI: 10.1097/maj.0000000000000436] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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35
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Li C, Ding C, Chen T, Chen J, Xu Z, Lei Z, Xu C, Zhao J. Micro ribonucleic acid-93 promotes proliferation and migration of esophageal squamous cell carcinoma by targeting disabled 2. Thorac Cancer 2015; 6:524-33. [PMID: 26273410 PMCID: PMC4511333 DOI: 10.1111/1759-7714.12242] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2014] [Accepted: 01/07/2015] [Indexed: 12/17/2022] Open
Abstract
Background Accumulated evidence has revealed that the dysregulation of micro ribonucleic acids (miRNAs) may contribute to esophageal squamous cell carcinoma (ESCC). MiR-93, which is a member of the miRNA cluster miR-106b∼25, has been widely studied for its tumor promoting effect on different types of cancers. However, our knowledge of miR-93 function in ESCC remains unclear. Methods The expression levels of miR-93 in ESCC and the adjacent non-tumor tissues were measured by real-time polymerase chain reaction. Cell counting kit-8, flow cytometry, and 5-ethynyl-2′-deoxyuridine incorporation and transwell migration assays were employed to explore the effects of miR-93 on proliferation and migration capabilities in EC109 cells. To determine the possible target gene of miR-93, cell transfection, Western blot analysis and luciferase reporter gene assays were performed. Results A significant upregulation of miR-93 expression in ESCC tissues was determined, combined with a downregulation of the predicted target gene, disabled 2 (DAB2). The introduction of miR-93 significantly promotes cell proliferation, cell cycle progression, and the metastatic capability of EC109 cells. By cell transfection and luciferase reporter assay, DAB2 was confirmed as a direct target of miR-93. In addition, the knockdown of DAB2 by small interfering RNA displayed a consentaneous phenocopy with miR-93 overexpression in EC109 cells. Conclusion Our results indicate that miR-93 acts as a tumor promoter in ESCC, and its promotion effects on ESCC cell proliferation and migration depend largely upon DAB2 suppression.
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Affiliation(s)
- Chang Li
- Department of Thoracic and Cardiovascular Surgery, The First Affiliated Hospital of Soochow University, Medical College of Soochow University Suzhou, China ; Soochow University Laboratory of Cancer Molecular Genetics, Medical College of Soochow University Suzhou, China ; Suzhou Key Laboratory for Cancer Molecular Genetics Suzhou, China
| | - Cheng Ding
- Department of Thoracic and Cardiovascular Surgery, The First Affiliated Hospital of Soochow University, Medical College of Soochow University Suzhou, China
| | - Tengfei Chen
- Department of Thoracic and Cardiovascular Surgery, The First Affiliated Hospital of Soochow University, Medical College of Soochow University Suzhou, China
| | - Jun Chen
- Department of Thoracic and Cardiovascular Surgery, The First Affiliated Hospital of Soochow University, Medical College of Soochow University Suzhou, China
| | - Zhenlei Xu
- Department of Thoracic and Cardiovascular Surgery, The First Affiliated Hospital of Soochow University, Medical College of Soochow University Suzhou, China
| | - Zhe Lei
- Soochow University Laboratory of Cancer Molecular Genetics, Medical College of Soochow University Suzhou, China ; Suzhou Key Laboratory for Cancer Molecular Genetics Suzhou, China
| | - Chun Xu
- Department of Thoracic and Cardiovascular Surgery, The First Affiliated Hospital of Soochow University, Medical College of Soochow University Suzhou, China
| | - Jun Zhao
- Department of Thoracic and Cardiovascular Surgery, The First Affiliated Hospital of Soochow University, Medical College of Soochow University Suzhou, China ; Soochow University Laboratory of Cancer Molecular Genetics, Medical College of Soochow University Suzhou, China ; Suzhou Key Laboratory for Cancer Molecular Genetics Suzhou, China
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Hormonal induction and roles of Disabled-2 in lactation and involution. PLoS One 2014; 9:e110737. [PMID: 25360623 PMCID: PMC4216001 DOI: 10.1371/journal.pone.0110737] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2014] [Accepted: 09/16/2014] [Indexed: 02/06/2023] Open
Abstract
Disabled-2 (Dab2) is a widely expressed endocytic adaptor that was first isolated as a 96 KDa phospho-protein, p96, involved in MAPK signal transduction. Dab2 expression is lost in several cancer types including breast cancer, and Dab2 is thought to have a tumor suppressor function. In mammary epithelia, Dab2 was induced upon pregnancy and further elevated during lactation. We constructed mutant mice with a mosaic Dab2 gene deletion to bypass early embryonic lethality and to investigate the roles of Dab2 in mammary physiology. Loss of Dab2 had subtle effects on lactation, but Dab2-deficient mammary glands showed a strikingly delayed cell clearance during involution. In primary cultures of mouse mammary epithelial cells, Dab2 proteins were also induced by estrogen, progesterone, and/or prolactin. Dab2 null mammary epithelial cells were refractory to growth suppression induced by TGF-beta. However, Dab2 deletion did not affect Smad2 phosphorylation; rather TGF-beta-stimulated MAPK activation was enhanced in Dab2-deficient cells. We conclude that Dab2 expression is induced by hormones and Dab2 plays a role in modulating TGF-beta signaling to enhance apoptotic clearance of mammary epithelial cells during involution.
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Gao S, Bajrami I, Verrill C, Kigozi A, Ouaret D, Aleksic T, Asher R, Han C, Allen P, Bailey D, Feller S, Kashima T, Athanasou N, Blay JY, Schmitz S, Machiels JP, Upile N, Jones TM, Thalmann G, Ashraf SQ, Wilding JL, Bodmer WF, Middleton MR, Ashworth A, Lord CJ, Macaulay VM. Dsh homolog DVL3 mediates resistance to IGFIR inhibition by regulating IGF-RAS signaling. Cancer Res 2014; 74:5866-77. [PMID: 25168481 DOI: 10.1158/0008-5472.can-14-0806] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Drugs that inhibit insulin-like growth factor 1 (IGFI) receptor IGFIR were encouraging in early trials, but predictive biomarkers were lacking and the drugs provided insufficient benefit in unselected patients. In this study, we used genetic screening and downstream validation to identify the WNT pathway element DVL3 as a mediator of resistance to IGFIR inhibition. Sensitivity to IGFIR inhibition was enhanced specifically in vitro and in vivo by genetic or pharmacologic blockade of DVL3. In breast and prostate cancer cells, sensitization tracked with enhanced MEK-ERK activation and relied upon MEK activity and DVL3 expression. Mechanistic investigations showed that DVL3 is present in an adaptor complex that links IGFIR to RAS, which includes Shc, growth factor receptor-bound-2 (Grb2), son-of-sevenless (SOS), and the tumor suppressor DAB2. Dual DVL and DAB2 blockade synergized in activating ERKs and sensitizing cells to IGFIR inhibition, suggesting a nonredundant role for DVL3 in the Shc-Grb2-SOS complex. Clinically, tumors that responded to IGFIR inhibition contained relatively lower levels of DVL3 protein than resistant tumors, and DVL3 levels in tumors correlated inversely with progression-free survival in patients treated with IGFIR antibodies. Because IGFIR does not contain activating mutations analogous to EGFR variants associated with response to EGFR inhibitors, we suggest that IGF signaling achieves an equivalent integration at the postreceptor level through adaptor protein complexes, influencing cellular dependence on the IGF axis and identifying a patient population with potential to benefit from IGFIR inhibition.
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Affiliation(s)
- Shan Gao
- Department of Oncology, Weatherall Institute of Molecular Medicine, John Radcliffe Hospital, University of Oxford, Oxford, United Kingdom
| | - Ilirjana Bajrami
- Breakthrough Breast Cancer Research Centre, The Institute of Cancer Research, London, United Kingdom
| | - Clare Verrill
- Department of Cellular Pathology and NIHR Oxford Biomedical Research Centre, Oxford University Hospitals NHS Trust, John Radcliffe Hospital, Oxford, United Kingdom
| | - Asha Kigozi
- Breakthrough Breast Cancer Research Centre, The Institute of Cancer Research, London, United Kingdom
| | - Djamila Ouaret
- Department of Oncology, Weatherall Institute of Molecular Medicine, John Radcliffe Hospital, University of Oxford, Oxford, United Kingdom
| | - Tamara Aleksic
- Department of Oncology, Weatherall Institute of Molecular Medicine, John Radcliffe Hospital, University of Oxford, Oxford, United Kingdom
| | - Ruth Asher
- Department of Cellular Pathology and NIHR Oxford Biomedical Research Centre, Oxford University Hospitals NHS Trust, John Radcliffe Hospital, Oxford, United Kingdom
| | - Cheng Han
- Department of Oncology, Weatherall Institute of Molecular Medicine, John Radcliffe Hospital, University of Oxford, Oxford, United Kingdom
| | - Paul Allen
- Department of Cellular Pathology, Oxford University Hospitals NHS Trust, John Radcliffe Hospital, Oxford, United Kingdom
| | - Deborah Bailey
- Department of Cellular Pathology, Oxford University Hospitals NHS Trust, John Radcliffe Hospital, Oxford, United Kingdom
| | - Stephan Feller
- Department of Oncology, Weatherall Institute of Molecular Medicine, John Radcliffe Hospital, University of Oxford, Oxford, United Kingdom
| | - Takeshi Kashima
- Department of Oncology, Weatherall Institute of Molecular Medicine, John Radcliffe Hospital, University of Oxford, Oxford, United Kingdom
| | - Nicholas Athanasou
- Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Science, Department of Pathology, Nuffield Orthopaedic Centre, Oxford, United Kingdom
| | - Jean-Yves Blay
- University Claude Bernard Lyon I, Centre Léon Bérard, Department of Medicine, Lyon, France
| | - Sandra Schmitz
- Service d'oncologie médicale, Cliniques universitaires Saint-Luc, Université catholique de Louvain, Brussels, Belgium
| | - Jean-Pascal Machiels
- Service d'oncologie médicale, Cliniques universitaires Saint-Luc, Université catholique de Louvain, Brussels, Belgium
| | - Nav Upile
- Liverpool CR-UK Centre, Department of Molecular and Clinical Cancer Medicine, Royal Liverpool University Hospital, Liverpool, United Kingdom
| | - Terry M Jones
- Liverpool CR-UK Centre, Department of Molecular and Clinical Cancer Medicine, Royal Liverpool University Hospital, Liverpool, United Kingdom
| | | | - Shazad Q Ashraf
- Department of Oncology, Weatherall Institute of Molecular Medicine, John Radcliffe Hospital, University of Oxford, Oxford, United Kingdom
| | - Jennifer L Wilding
- Department of Oncology, Weatherall Institute of Molecular Medicine, John Radcliffe Hospital, University of Oxford, Oxford, United Kingdom
| | - Walter F Bodmer
- Department of Oncology, Weatherall Institute of Molecular Medicine, John Radcliffe Hospital, University of Oxford, Oxford, United Kingdom
| | - Mark R Middleton
- Oxford Cancer and Haematology Centre, Oxford University Hospitals NHS Trust, Churchill Hospital, Oxford, Liverpool, United Kingdom
| | - Alan Ashworth
- Breakthrough Breast Cancer Research Centre, The Institute of Cancer Research, London, United Kingdom
| | - Christopher J Lord
- Breakthrough Breast Cancer Research Centre, The Institute of Cancer Research, London, United Kingdom
| | - Valentine M Macaulay
- Department of Oncology, Weatherall Institute of Molecular Medicine, John Radcliffe Hospital, University of Oxford, Oxford, United Kingdom. Oxford Cancer and Haematology Centre, Oxford University Hospitals NHS Trust, Churchill Hospital, Oxford, Liverpool, United Kingdom.
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Tsai HJ, Huang CL, Chang YW, Huang DY, Lin CC, Cooper JA, Cheng JC, Tseng CP. Disabled-2 is required for efficient hemostasis and platelet activation by thrombin in mice. Arterioscler Thromb Vasc Biol 2014; 34:2404-12. [PMID: 25212232 DOI: 10.1161/atvbaha.114.302602] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
OBJECTIVE The essential role of platelet activation in hemostasis and thrombotic diseases focuses attention on unveiling the underlying intracellular signals of platelet activation. Disabled-2 (Dab2) has been implicated in platelet aggregation and in the control of clotting responses. However, there is not yet any in vivo study to provide direct evidence for the role of Dab2 in hemostasis and platelet activation. APPROACH AND RESULTS Megakaryocyte lineage-restricted Dab2 knockout (Dab2(-/-)) mice were generated to delineate in vivo functions of Dab2 in platelets. Dab2(-/-) mice appeared normal in size with prolonged bleeding time and impaired thrombus formation. Although normal in platelet production and granule biogenesis, Dab2(-/-) platelets elicited a selective defect in platelet aggregation and spreading on fibrinogen in response to low concentrations of thrombin, but not other soluble agonists. Investigation of the role of Dab2 in thrombin signaling revealed that Dab2 has no effect on the expression of thrombin receptors and the outside-in signaling. Dab2(-/-) platelets stimulated by low concentrations of thrombin were normal in Gαq-mediated calcium mobilization and protein kinase C activation, but were defective in Gα₁₂/₁₃-mediated RhoA-ROCKII activation. The attenuated Gα₁₂/₁₃ signaling led to impaired ADP release, Akt-mammalian target of rapamycin and integrin αIIbβ3 activation, fibrinogen binding, and clot retraction. The defective responses of Dab2(-/-) platelets to low concentrations of thrombin stimulation may contribute to the impaired hemostasis and thrombosis of Dab2(-/-) mice. CONCLUSIONS This study sheds new insight in platelet biology and represents the first report demonstrating that Dab2 is a key regulator of hemostasis and thrombosis by functional interplay with Gα₁₂/₁₃-mediated thrombin signaling.
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Affiliation(s)
- Hui-Ju Tsai
- From the Graduate Institute of Biomedical Sciences (H.-J.T., Y.-W.C., C.-P.T.), and Department of Medical Biotechnology and Laboratory Science (C.-L.H., D.-Y.H., C.-C.L., C.-P.T.), College of Medicine, Chang Gung University, Taoyuan, Taiwan; Division of Basic Sciences, Fred Hutchinson Cancer Research Center, Seattle, WA (J.A.C.); Department of Medical Laboratory Science and Biotechnology, China Medical University, Taichung, Taiwan (J.-C.C.); Molecular Medicine Research Center, Chang Gung University (C.-P.T.) and Department of Family Medicine (C.-P.T.), Chang Gung Memorial Hospital, Taoyuan, Taiwan
| | - Chien-Ling Huang
- From the Graduate Institute of Biomedical Sciences (H.-J.T., Y.-W.C., C.-P.T.), and Department of Medical Biotechnology and Laboratory Science (C.-L.H., D.-Y.H., C.-C.L., C.-P.T.), College of Medicine, Chang Gung University, Taoyuan, Taiwan; Division of Basic Sciences, Fred Hutchinson Cancer Research Center, Seattle, WA (J.A.C.); Department of Medical Laboratory Science and Biotechnology, China Medical University, Taichung, Taiwan (J.-C.C.); Molecular Medicine Research Center, Chang Gung University (C.-P.T.) and Department of Family Medicine (C.-P.T.), Chang Gung Memorial Hospital, Taoyuan, Taiwan
| | - Yao-Wen Chang
- From the Graduate Institute of Biomedical Sciences (H.-J.T., Y.-W.C., C.-P.T.), and Department of Medical Biotechnology and Laboratory Science (C.-L.H., D.-Y.H., C.-C.L., C.-P.T.), College of Medicine, Chang Gung University, Taoyuan, Taiwan; Division of Basic Sciences, Fred Hutchinson Cancer Research Center, Seattle, WA (J.A.C.); Department of Medical Laboratory Science and Biotechnology, China Medical University, Taichung, Taiwan (J.-C.C.); Molecular Medicine Research Center, Chang Gung University (C.-P.T.) and Department of Family Medicine (C.-P.T.), Chang Gung Memorial Hospital, Taoyuan, Taiwan
| | - Ding-Yuan Huang
- From the Graduate Institute of Biomedical Sciences (H.-J.T., Y.-W.C., C.-P.T.), and Department of Medical Biotechnology and Laboratory Science (C.-L.H., D.-Y.H., C.-C.L., C.-P.T.), College of Medicine, Chang Gung University, Taoyuan, Taiwan; Division of Basic Sciences, Fred Hutchinson Cancer Research Center, Seattle, WA (J.A.C.); Department of Medical Laboratory Science and Biotechnology, China Medical University, Taichung, Taiwan (J.-C.C.); Molecular Medicine Research Center, Chang Gung University (C.-P.T.) and Department of Family Medicine (C.-P.T.), Chang Gung Memorial Hospital, Taoyuan, Taiwan
| | - Chung-Ching Lin
- From the Graduate Institute of Biomedical Sciences (H.-J.T., Y.-W.C., C.-P.T.), and Department of Medical Biotechnology and Laboratory Science (C.-L.H., D.-Y.H., C.-C.L., C.-P.T.), College of Medicine, Chang Gung University, Taoyuan, Taiwan; Division of Basic Sciences, Fred Hutchinson Cancer Research Center, Seattle, WA (J.A.C.); Department of Medical Laboratory Science and Biotechnology, China Medical University, Taichung, Taiwan (J.-C.C.); Molecular Medicine Research Center, Chang Gung University (C.-P.T.) and Department of Family Medicine (C.-P.T.), Chang Gung Memorial Hospital, Taoyuan, Taiwan
| | - Jonathan A Cooper
- From the Graduate Institute of Biomedical Sciences (H.-J.T., Y.-W.C., C.-P.T.), and Department of Medical Biotechnology and Laboratory Science (C.-L.H., D.-Y.H., C.-C.L., C.-P.T.), College of Medicine, Chang Gung University, Taoyuan, Taiwan; Division of Basic Sciences, Fred Hutchinson Cancer Research Center, Seattle, WA (J.A.C.); Department of Medical Laboratory Science and Biotechnology, China Medical University, Taichung, Taiwan (J.-C.C.); Molecular Medicine Research Center, Chang Gung University (C.-P.T.) and Department of Family Medicine (C.-P.T.), Chang Gung Memorial Hospital, Taoyuan, Taiwan
| | - Ju-Chien Cheng
- From the Graduate Institute of Biomedical Sciences (H.-J.T., Y.-W.C., C.-P.T.), and Department of Medical Biotechnology and Laboratory Science (C.-L.H., D.-Y.H., C.-C.L., C.-P.T.), College of Medicine, Chang Gung University, Taoyuan, Taiwan; Division of Basic Sciences, Fred Hutchinson Cancer Research Center, Seattle, WA (J.A.C.); Department of Medical Laboratory Science and Biotechnology, China Medical University, Taichung, Taiwan (J.-C.C.); Molecular Medicine Research Center, Chang Gung University (C.-P.T.) and Department of Family Medicine (C.-P.T.), Chang Gung Memorial Hospital, Taoyuan, Taiwan
| | - Ching-Ping Tseng
- From the Graduate Institute of Biomedical Sciences (H.-J.T., Y.-W.C., C.-P.T.), and Department of Medical Biotechnology and Laboratory Science (C.-L.H., D.-Y.H., C.-C.L., C.-P.T.), College of Medicine, Chang Gung University, Taoyuan, Taiwan; Division of Basic Sciences, Fred Hutchinson Cancer Research Center, Seattle, WA (J.A.C.); Department of Medical Laboratory Science and Biotechnology, China Medical University, Taichung, Taiwan (J.-C.C.); Molecular Medicine Research Center, Chang Gung University (C.-P.T.) and Department of Family Medicine (C.-P.T.), Chang Gung Memorial Hospital, Taoyuan, Taiwan.
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Sewduth RN, Jaspard-Vinassa B, Peghaire C, Guillabert A, Franzl N, Larrieu-Lahargue F, Moreau C, Fruttiger M, Dufourcq P, Couffinhal T, Duplàa C. The ubiquitin ligase PDZRN3 is required for vascular morphogenesis through Wnt/planar cell polarity signalling. Nat Commun 2014; 5:4832. [PMID: 25198863 DOI: 10.1038/ncomms5832] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2014] [Accepted: 07/28/2014] [Indexed: 01/01/2023] Open
Abstract
Development and stabilization of a vascular plexus requires the coordination of multiple signalling processes. Wnt planar cell polarity (PCP) signalling is critical in vertebrates for diverse morphogenesis events, which coordinate cell orientation within a tissue-specific plane. However, its functional role in vascular morphogenesis is not well understood. Here we identify PDZRN3, an ubiquitin ligase, and report that Pdzrn3 deficiency impairs embryonic angiogenic remodelling and postnatal retinal vascular patterning, with a loss of two-dimensional polarized orientation of the intermediate retinal plexus. Using in vitro and ex vivo Pdzrn3 loss-of-function and gain-of-function experiments, we demonstrate a key role of PDZRN3 in endothelial cell directional and coordinated extension. PDZRN3 ubiquitinates Dishevelled 3 (Dvl3), to promote endocytosis of the Frizzled/Dvl3 complex, for PCP signal transduction. These results highlight the role of PDZRN3 to direct Wnt PCP signalling, and broadly implicate this pathway in the planar orientation and highly branched organization of vascular plexuses.
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Affiliation(s)
- Raj N Sewduth
- INSERM, Adaptation cardiovasculaire à l'ischémie, U1034, F-33600 Pessac, France
| | - Béatrice Jaspard-Vinassa
- 1] INSERM, Adaptation cardiovasculaire à l'ischémie, U1034, F-33600 Pessac, France [2] Univ. Bordeaux, Adaptation cardiovasculaire à l'ischémie, U1034, F-33600 Pessac, France
| | - Claire Peghaire
- INSERM, Adaptation cardiovasculaire à l'ischémie, U1034, F-33600 Pessac, France
| | - Aude Guillabert
- INSERM, Adaptation cardiovasculaire à l'ischémie, U1034, F-33600 Pessac, France
| | - Nathalie Franzl
- INSERM, Adaptation cardiovasculaire à l'ischémie, U1034, F-33600 Pessac, France
| | | | - Catherine Moreau
- INSERM, Adaptation cardiovasculaire à l'ischémie, U1034, F-33600 Pessac, France
| | | | - Pascale Dufourcq
- 1] INSERM, Adaptation cardiovasculaire à l'ischémie, U1034, F-33600 Pessac, France [2] Univ. Bordeaux, Adaptation cardiovasculaire à l'ischémie, U1034, F-33600 Pessac, France
| | - Thierry Couffinhal
- 1] INSERM, Adaptation cardiovasculaire à l'ischémie, U1034, F-33600 Pessac, France [2] Univ. Bordeaux, Adaptation cardiovasculaire à l'ischémie, U1034, F-33600 Pessac, France [3] CHU de Bordeaux, Service des Maladies Cardiaques et Vasculaires, F-33000 Bordeaux, France
| | - Cécile Duplàa
- 1] INSERM, Adaptation cardiovasculaire à l'ischémie, U1034, F-33600 Pessac, France [2] Univ. Bordeaux, Adaptation cardiovasculaire à l'ischémie, U1034, F-33600 Pessac, France
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40
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Loss of Dab2 expression in breast cancer cells impairs their ability to deplete TGF-β and induce Tregs development via TGF-β. PLoS One 2014; 9:e91709. [PMID: 24638085 PMCID: PMC3956763 DOI: 10.1371/journal.pone.0091709] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2013] [Accepted: 02/14/2014] [Indexed: 11/19/2022] Open
Abstract
Dab2 is a multifunctional adapter protein which is frequently under-expressed in a variety of cancers. It is implicated in many critical functions, including several signaling pathways, cell arrangement, differentiation of stem cells, and receptor endocytosis. Transforming growth factor-β (TGF-β) is a secreted multifunctional protein that controls several developmental processes and pathogenesis of many diseases. It has been documented that Dab2 played an important role in TGF-β receptors endocytosis. Here, we present evidence that re-expression of Dab2 in SK-BR-3 cell partially restored its ability to deplete TGF-β in surrounding medium by normalizing the trafficking of TGF-β receptors. We also demonstrate that the difference in TGF-β depletions produced by Dab2 expression was sufficient to impact on the conversion of naive CD4+ T cells to regulatory T cells (Tregs), and thus inhibited the proliferation of T cells. This work revealed a critical result that breast cancer cell was deficient in Dab2 expression and related receptor endocytosis-mediated TGF-β depletion, which may contribute to the accumulation of TGF-β in tumor microenvironment and the induction of immune tolerance.
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Moore R, Cai KQ, Tao W, Smith ER, Xu XX. Differential requirement for Dab2 in the development of embryonic and extra-embryonic tissues. BMC DEVELOPMENTAL BIOLOGY 2013; 13:39. [PMID: 24168030 PMCID: PMC3924344 DOI: 10.1186/1471-213x-13-39] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/13/2013] [Accepted: 10/25/2013] [Indexed: 11/10/2022]
Abstract
BACKGROUND Disabled-2 (Dab2) is an endocytic adaptor protein involved in clathrin-mediated endocytosis and cargo trafficking. Since its expression is lost in several cancer types, Dab2 has been suggested to be a tumor suppressor. In vitro studies indicate that Dab2 establishes epithelial cell polarity and organization by directing endocytic trafficking of membrane glycoproteins. Dab2 also modulates cellular signaling pathways by mediating the endocytosis and recycling of surface receptors and associated signaling components. Previously, two independent gene knockout studies have been reported, with some discrepancies in the observed embryonic phenotypes. To further clarify the in vivo roles of Dab2 in development and physiology, we designed a new floxed allele to delete dab2 gene. RESULTS The constitutive dab2 deleted embryos showed a spectrum in the degree of endoderm disorganization in E5.5 and no mutant embryos persisted at E9.5. However, the mice were grossly normal when dab2 deletion was restricted to the embryo proper and the gene was retained in extraembryonic tissues using Meox2-Cre and Sox2-Cre. Adult Dab2-deficient mice had a small but statistically significant increase in serum cholesterol levels. CONCLUSION The study of the new dab2 mutant allele in embryos and embryoid bodies confirms a role for Dab2 in extraembryonic endoderm development and epithelial organization. Experimental results with embryoid bodies suggest that additional endocytic adaptors such as Arh and Numb could partially compensate for Dab2 loss. Conditional deletion indicates that Dab2 is dispensable for organ development, when the vast majority of the embryonic cells are dab2 null. However, Dab2 has a physiological role in the endocytosis of lipoproteins and cholesterol metabolism.
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Affiliation(s)
| | | | | | | | - Xiang-Xi Xu
- Department of Cell Biology, University of Miami Miller School of Medicine, Miami, 33136, FL, USA.
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Maupin KA, Droscha CJ, Williams BO. A Comprehensive Overview of Skeletal Phenotypes Associated with Alterations in Wnt/β-catenin Signaling in Humans and Mice. Bone Res 2013; 1:27-71. [PMID: 26273492 DOI: 10.4248/br201301004] [Citation(s) in RCA: 87] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2012] [Accepted: 01/20/2013] [Indexed: 12/23/2022] Open
Abstract
The Wnt signaling pathway plays key roles in differentiation and development and alterations in this signaling pathway are causally associated with numerous human diseases. While several laboratories were examining roles for Wnt signaling in skeletal development during the 1990s, interest in the pathway rose exponentially when three key papers were published in 2001-2002. One report found that loss of the Wnt co-receptor, Low-density lipoprotein related protein-5 (LRP5), was the underlying genetic cause of the syndrome Osteoporosis pseudoglioma (OPPG). OPPG is characterized by early-onset osteoporosis causing increased susceptibility to debilitating fractures. Shortly thereafter, two groups reported that individuals carrying a specific point mutation in LRP5 (G171V) develop high-bone mass. Subsequent to this, the causative mechanisms for these observations heightened the need to understand the mechanisms by which Wnt signaling controlled bone development and homeostasis and encouraged significant investment from biotechnology and pharmaceutical companies to develop methods to activate Wnt signaling to increase bone mass to treat osteoporosis and other bone disease. In this review, we will briefly summarize the cellular mechanisms underlying Wnt signaling and discuss the observations related to OPPG and the high-bone mass disorders that heightened the appreciation of the role of Wnt signaling in normal bone development and homeostasis. We will then present a comprehensive overview of the core components of the pathway with an emphasis on the phenotypes associated with mice carrying genetically engineered mutations in these genes and clinical observations that further link alterations in the pathway to changes in human bone.
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Affiliation(s)
- Kevin A Maupin
- Program for Skeletal Pathobiology and Center for Tumor Metastasis, Van Andel Research Institute , 333 Bostwick NE, Grand Rapids, MI 49503, USA
| | - Casey J Droscha
- Program for Skeletal Pathobiology and Center for Tumor Metastasis, Van Andel Research Institute , 333 Bostwick NE, Grand Rapids, MI 49503, USA
| | - Bart O Williams
- Program for Skeletal Pathobiology and Center for Tumor Metastasis, Van Andel Research Institute , 333 Bostwick NE, Grand Rapids, MI 49503, USA
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High-affinity Dkk1 receptor Kremen1 is internalized by clathrin-mediated endocytosis. PLoS One 2012; 7:e52190. [PMID: 23251700 PMCID: PMC3522622 DOI: 10.1371/journal.pone.0052190] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2012] [Accepted: 11/15/2012] [Indexed: 12/16/2022] Open
Abstract
Kremens are high-affinity receptors for Dickkopf 1 (Dkk1) and regulate the Wnt/β-catenin signaling pathway by down-regulating the low-density lipoprotein receptor-related protein 6 (LRP6). Dkk1 competes with Wnt for binding to LRP6; binding of Dkk1 inhibits canonical signaling through formation of a ternary complex with Kremen. The majority of down-regulated clathrin-mediated endocytic receptors contain short conserved regions that recognize tyrosine or dileucine sorting motifs. In this study, we found that Kremen1 is internalized from the cell surface in a clathrin-dependent manner. Kremen1 contains an atypical dileucine motif with the sequence DXXXLV. Mutation of LV to AA in this motif blocked Kremen1 internalization; as reported previously for other proteins, the aspartic acid residue in Kremen1 is not critical. Inhibition of expression of the adaptor protein 2 (AP-2) or inhibition of clathrin by pitstop 2 also blocked Kremen1 internalization. The novel amino acid sequence identified in Kremen1 is similar to the motif previously identified in hydra, yeast, and other organisms known to signal from the trans-Golgi network to the endosomal compartment.
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Yang Y, Zhang Q, Xu F, Chang C, Li X. Aberrant promoter methylation of Dab2 gene in myelodysplastic syndrome. Eur J Haematol 2012; 89:469-77. [PMID: 23005040 DOI: 10.1111/ejh.12014] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/16/2012] [Indexed: 01/08/2023]
Affiliation(s)
- Yujuan Yang
- Department of Hematology, The Sixth Hospital; Shanghai Jiaotong University; Shanghai; China
| | - Qingxia Zhang
- Department of Hematology, The Sixth Hospital; Shanghai Jiaotong University; Shanghai; China
| | - Feng Xu
- Department of Hematology, The Sixth Hospital; Shanghai Jiaotong University; Shanghai; China
| | - Chunkang Chang
- Department of Hematology, The Sixth Hospital; Shanghai Jiaotong University; Shanghai; China
| | - Xiao Li
- Department of Hematology, The Sixth Hospital; Shanghai Jiaotong University; Shanghai; China
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45
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Mayorga ME, Penn MS. miR-145 is differentially regulated by TGF-β1 and ischaemia and targets Disabled-2 expression and wnt/β-catenin activity. J Cell Mol Med 2012; 16:1106-13. [PMID: 21762377 PMCID: PMC4365889 DOI: 10.1111/j.1582-4934.2011.01385.x] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
The effect of wnt/β-catenin signalling in the response to acute myocardial infarction (AMI) remains controversial. The membrane receptor adaptor protein Disabled-2 (Dab2) is a tumour suppressor protein and has a critical role in stem cell specification. We recently demonstrated that down-regulation of Dab2 regulates cardiac protein expression and wnt/β-catenin activity in mesenchymal stem cells (MSC) in response to transforming growth factor-β(1) (TGF-β(1)). Although Dab2 expression has been shown to have effects in stem cells and tumour suppression, the molecular mechanisms regulating this expression are still undefined. We identified putative binding sites for miR-145 in the 3'-UTR of Dab2. In MSC in culture, we observed that TGF-β(1) treatment led to rapid and sustained up-regulation of pri-miR-145. Through gain and loss of function studies we demonstrate that miR-145 up-regulation was required for the down-regulation of Dab2 and increased β-catenin activity in response to TGF-β(1). To begin to define how Dab2 might regulate wnt/β-catenin in the heart following AMI, we quantified myocardial Dab2 as a function of time after left anterior descending ligation. There was no significant Dab2 expression in sham-operated myocardium. Following AMI, Dab2 levels were rapidly up-regulated in cardiac myocytes in the infarct border zone. The increase in cardiac myocyte Dab2 expression correlated with the rapid and sustained down-regulation of myocardial pri-miR-145 expression following AMI. Our data demonstrate a novel and critical role for miR-145 expression as a regulator of Dab2 expression and β-catenin activity in response to TGF-β(1) and hypoxia.
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Affiliation(s)
- Maritza E Mayorga
- Skirball Laboratory for Cardiovascular Cellular Therapeutics, Cleveland, OH, USA
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46
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Tone AA, Virtanen C, Shaw P, Brown TJ. Prolonged Postovulatory Proinflammatory Signaling in the Fallopian Tube Epithelium May Be Mediated through a BRCA1/DAB2 Axis. Clin Cancer Res 2012; 18:4334-44. [DOI: 10.1158/1078-0432.ccr-12-0199] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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47
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Feed-back regulation of disabled-2 (Dab2) p96 isoform for GATA-4 during differentiation of F9 cells. Biochem Biophys Res Commun 2012; 421:591-8. [PMID: 22525672 DOI: 10.1016/j.bbrc.2012.04.051] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2012] [Accepted: 04/10/2012] [Indexed: 11/20/2022]
Abstract
F9 embryonic carcinoma (EC) cells undergo extra-embryonic endodermal (ExE) differentiation in response to retinoic acid (RA) treatment, which induces the expression of two isoforms (p96 and p67) of the adaptor protein, Disabled-2 (Dab2). In the current study, constitutive and ectopic expression of the p96 isoform induced ExE differentiation in F9 EC cells in the absence of RA treatment via the activation of GATA-4 by p96. During the RA-induced differentiation process, Dab2 expression is induced by the GATA factors in a coherent feed-forward loop; on the other hand, we showed that p96 regulates GATA-4 in a positive feed-back manner in this study. Our results indicate that p96 Dab2 plays a key role in the ExE differentiation process.
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48
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Novel aspects of the apolipoprotein-E receptor family: regulation and functional role of their proteolytic processing. ACTA ACUST UNITED AC 2012. [DOI: 10.1007/s11515-011-1186-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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49
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Patel TR, Winzor DJ. Reassessment of the size of the supermolecular state of Dishevelled-3. J Mol Recognit 2012; 24:843-6. [PMID: 21812058 DOI: 10.1002/jmr.1125] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Amendment of the interpretation of recently published size-exclusion chromatography data for Dishevelled-3 on Superdex 200 and Sephacryl S-400 has led to an increase in the estimated size of the supermolecular state from 2000 to 35 000 kDa, a value that essentially duplicates the redetermined and reported estimates obtained by fluorescence correlation spectroscopy on live cells. The earlier discrepancy between the sizes of the extensively aggregated form of this scaffold protein in vivo and in vitro is thereby eliminated.
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Affiliation(s)
- Trushar R Patel
- Department of Chemistry, University of Manitoba, Winnipeg, Manitoba, Canada.
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50
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Patel TR, Winzor DJ. The macromolecular state of A-kinase anchoring protein. J Mol Recognit 2011; 25:11-4. [DOI: 10.1002/jmr.1164] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Trushar R. Patel
- Department of Chemistry; University of Manitoba; Winnipeg; Manitoba; Canada; R3T 2N2
| | - Donald J. Winzor
- School of Chemistry and Molecular Biosciences; University of Queensland; Brisbane; Queensland; 4072; Australia
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