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Fan X, Jiang J, Zhao D, Chen F, Ma H, Smith P, Unterholzner L, Xiao TS, Jin T. Structural mechanism of DNA recognition by the p204 HIN domain. Nucleic Acids Res 2021; 49:2959-2972. [PMID: 33619523 PMCID: PMC7969034 DOI: 10.1093/nar/gkab076] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2020] [Revised: 01/22/2021] [Accepted: 02/14/2021] [Indexed: 12/25/2022] Open
Abstract
The interferon gamma-inducible protein 16 (IFI16) and its murine homologous protein p204 function in non-sequence specific dsDNA sensing; however, the exact dsDNA recognition mechanisms of IFI16/p204, which harbour two HIN domains, remain unclear. In the present study, we determined crystal structures of p204 HINa and HINb domains, which are highly similar to those of other PYHIN family proteins. Moreover, we obtained the crystal structure of p204 HINab domain in complex with dsDNA and provided insights into the dsDNA binding mode. p204 HINab binds dsDNA mainly through α2 helix of HINa and HINb, and the linker between them, revealing a similar HIN:DNA binding mode. Both HINa and HINb are vital for HINab recognition of dsDNA, as confirmed by fluorescence polarization assays. Furthermore, a HINa dimerization interface was observed in structures of p204 HINa and HINab:dsDNA complex, which is involved in binding dsDNA. The linker between HINa and HINb reveals dynamic flexibility in solution and changes its direction at ∼90° angle in comparison with crystal structure of HINab:dsDNA complex. These structural information provide insights into the mechanism of DNA recognition by different HIN domains, and shed light on the unique roles of two HIN domains in activating the IFI16/p204 signaling pathway.
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Affiliation(s)
- Xiaojiao Fan
- Department of Obstetrics and Gynecology, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, Anhui 230001, P.R. China
| | - Jiansheng Jiang
- Laboratory of Immune System Biology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892, USA
| | - Dan Zhao
- Hefei National Laboratory for Physical Sciences at Microscale, the CAS Key Laboratory of Innate Immunity and Chronic Disease, School of Basic Medical Sciences, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei 230027 China
| | - Feng Chen
- Hefei National Laboratory for Physical Sciences at Microscale, the CAS Key Laboratory of Innate Immunity and Chronic Disease, School of Basic Medical Sciences, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei 230027 China
| | - Huan Ma
- Hefei National Laboratory for Physical Sciences at Microscale, the CAS Key Laboratory of Innate Immunity and Chronic Disease, School of Basic Medical Sciences, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei 230027 China
| | - Patrick Smith
- Laboratory of Immune System Biology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892, USA
| | - Leonie Unterholzner
- Division of Biomedical and Life Sciences, Faculty of Health and Medicine, Lancaster University, Lancaster LA1 4YQ, UK
| | - Tsan Sam Xiao
- Department of Pathology, Case Western Reserve University, Cleveland, OH 44106, USA
| | - Tengchuan Jin
- Department of Obstetrics and Gynecology, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, Anhui 230001, P.R. China
- Hefei National Laboratory for Physical Sciences at Microscale, the CAS Key Laboratory of Innate Immunity and Chronic Disease, School of Basic Medical Sciences, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei 230027 China
- CAS Center for Excellence in Molecular Cell Science, Shanghai, China
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Shi S, Sun J, Meng Q, Yu Y, Huang H, Ma T, Yang Z, Liu X, Yang J, Shen Z. Sonic hedgehog promotes endothelial differentiation of bone marrow mesenchymal stem cells via VEGF-D. J Thorac Dis 2018; 10:5476-5488. [PMID: 30416797 DOI: 10.21037/jtd.2018.09.50] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Background Bone marrow-derived mesenchymal stem cells (BMSCs) have been proved to be capable of differentiating into endothelial cells (ECs), however, the differentiation efficiency is rather low. Sonic hedgehog (Shh), an important factor in vascular development and postnatal angiogenesis, exerted promotional effect on new vessel formation in the ischemic animal models. Therefore, the current study aims to investigate whether Shh could induce the endothelial differentiation of BMSCs both in vitro and in vivo, as well as the mechanism of differentiation induction. Methods The current study over-expressed Shh in BMSCs by lentivirus transduction. Reverse-transcription quantitative polymerase chain reaction (RT-qPCR) analysis was performed to determine the angiogenic factors in both control BMSCs and Shh over-expressed BMSCs. Immunocytochemistry was also conducted to examine the EC markers. Angiogenesis was determined by in vitro tube-forming assay on Matrigel and in vivo Matrigel plug in severe combined immunodeficient (SCID) mice. Last, mRNA sequencing analysis was used to elaborate the underlying mechanisms. Loss of function study was performed by vascular endothelial growth factor D (VEGF-D) siRNA. Results Shh expression was increased by about 3,000-fold and 5,000-fold at 3 days-transfection and 7 days-transfection, respectively. Patched 1 (Ptch1), the receptor for Shh, had a two-fold increase after transduction. The angiogenic factors such as hepatocyte growth factor (HGF), angiopoietin-1 (Ang-1), insulin-like growth factor 1 (IGF1) and vascular endothelial growth factor A (VEGF-A) had at least a 1.5-fold increase after transduction. Expression of EC-lineage markers, CD31 and VE-cadherin, on Shh-overexpressed BMSCs were increasingly detected by immunocytostaining. Angiogenesis of BMSCs could be efficiently induced by Shh overexpression in the in vitro tube-formation assay and in vivo Matrigel plug. Additionally, mRNA sequencing analysis revealed that Shh activation upregulated the expression of several pro-angiogenic factors, like Angptl4, Egfl6, VEGF-D. Loss of function study by VEGF-D siRNA confirmed that Shh enhanced the angiogenic ability of BMSCs via VEGF-D. Conclusions This study demonstrated that Shh could promote endothelial differentiation of BMSCs via VEGF-D.
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Affiliation(s)
- Sheng Shi
- Department of Cardiovascular Surgery of the First Affiliated Hospital & Institute for Cardiovascular Science, Soochow University, Suzhou 215006, China.,Department of Cardiovascular Surgery, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 201620, China
| | - Jiacheng Sun
- Department of Cardiovascular Surgery of the First Affiliated Hospital & Institute for Cardiovascular Science, Soochow University, Suzhou 215006, China
| | - Qingyou Meng
- Department of Cardiovascular Surgery of the First Affiliated Hospital & Institute for Cardiovascular Science, Soochow University, Suzhou 215006, China
| | - Yunsheng Yu
- Department of Cardiovascular Surgery of the First Affiliated Hospital & Institute for Cardiovascular Science, Soochow University, Suzhou 215006, China
| | - Haoyue Huang
- Department of Cardiovascular Surgery of the First Affiliated Hospital & Institute for Cardiovascular Science, Soochow University, Suzhou 215006, China
| | - Teng Ma
- Department of Cardiovascular Surgery of the First Affiliated Hospital & Institute for Cardiovascular Science, Soochow University, Suzhou 215006, China
| | - Ziying Yang
- Department of Cardiovascular Surgery of the First Affiliated Hospital & Institute for Cardiovascular Science, Soochow University, Suzhou 215006, China
| | - Xuan Liu
- Department of Cardiovascular Surgery of the First Affiliated Hospital & Institute for Cardiovascular Science, Soochow University, Suzhou 215006, China
| | - Junjie Yang
- Department of Cardiovascular Surgery of the First Affiliated Hospital & Institute for Cardiovascular Science, Soochow University, Suzhou 215006, China
| | - Zhenya Shen
- Department of Cardiovascular Surgery of the First Affiliated Hospital & Institute for Cardiovascular Science, Soochow University, Suzhou 215006, China
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Sun J, Zhang Z, Ma T, Yang Z, Zhang J, Liu X, Lu D, Shen Z, Yang J, Meng Q. Endothelial progenitor cell-derived exosomes, loaded with miR-126, promoted deep vein thrombosis resolution and recanalization. Stem Cell Res Ther 2018; 9:223. [PMID: 30139377 PMCID: PMC6107966 DOI: 10.1186/s13287-018-0952-8] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2018] [Revised: 06/25/2018] [Accepted: 07/06/2018] [Indexed: 02/03/2023] Open
Abstract
Background Deep vein thrombosis (DVT) is caused by blood clotting in the deep veins. Thrombosis resolution and recanalization can be accelerated by endothelial progenitor cells. In this report, we investigated the effects of miR-126-loaded EPC-derived exosomes (miR-126-Exo) on EPCs function and venous thrombus resolution. Methods In vitro promotional effect of miR-126-Exo on the migration and tube incorporation ability of EPCs was investigated via transwell assay and tube formation assay. In addition, a mouse venous thrombosis model was constructed and treated with miR-126-Exo to clarify the therapeutic effect of miR-126-Exo by histological analysis. Lastly, this study predicted a target gene of miR-126 using target prediction algorithms and confirmed it by luciferase activity assay, RT-qPCR, and Western blot. Results Transwell assay and tube formation assay indicated that miR-126-Exo could enhance the migration and tube incorporation ability of EPCs. Moreover, in vivo study manifested enhanced thrombus organization and recanalization after miR-126-Exo treatment. Meanwhile, we identified that Protocadherin 7 as a target gene of miR-126. Conclusions To sum up, our results demonstrated that EPC-derived exosomes loaded with miR-126 significantly promoted thrombus resolution in an animal model of venous thrombosis, indicating exosomes as a promising potential vehicle carrying therapeutic molecules for DVT therapy.
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Affiliation(s)
- Jiacheng Sun
- Department of Cardiovascular Surgery of the First Affiliated Hospital and Institute for Cardiovascular Science, Soochow University, Suzhou, 215000, China
| | - Zhiwei Zhang
- Department of Cardiothoracic Surgery, The Second Affiliated Hospital of Soochow University, Suzhou, 215004, China
| | - Teng Ma
- Department of Cardiovascular Surgery of the First Affiliated Hospital and Institute for Cardiovascular Science, Soochow University, Suzhou, 215000, China
| | - Ziying Yang
- Department of Cardiovascular Surgery of the First Affiliated Hospital and Institute for Cardiovascular Science, Soochow University, Suzhou, 215000, China
| | - Jinlong Zhang
- Department of Cardiovascular Surgery of the First Affiliated Hospital and Institute for Cardiovascular Science, Soochow University, Suzhou, 215000, China
| | - Xuan Liu
- Department of Cardiovascular Surgery of the First Affiliated Hospital and Institute for Cardiovascular Science, Soochow University, Suzhou, 215000, China
| | - Da Lu
- Department of Cardiovascular Surgery of the First Affiliated Hospital and Institute for Cardiovascular Science, Soochow University, Suzhou, 215000, China
| | - Zhenya Shen
- Department of Cardiovascular Surgery of the First Affiliated Hospital and Institute for Cardiovascular Science, Soochow University, Suzhou, 215000, China.
| | - Junjie Yang
- Department of Biomedical Engineering, University of Alabama at Birmingham, Birmingham, 35294, Alabama, USA. .,Department of Cardiovascular Surgery of the First Affiliated Hospital and Institute for Cardiovascular Science, Soochow University, Suzhou, 215000, China.
| | - Qingyou Meng
- Department of Vascular Surgery, The Second Affiliated Hospital of Soochow University, Suzhou, 215000, China. .,Department of Cardiovascular Surgery of the First Affiliated Hospital and Institute for Cardiovascular Science, Soochow University, Suzhou, 215000, China.
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You J, Sun J, Ma T, Yang Z, Wang X, Zhang Z, Li J, Wang L, Ii M, Yang J, Shen Z. Curcumin induces therapeutic angiogenesis in a diabetic mouse hindlimb ischemia model via modulating the function of endothelial progenitor cells. Stem Cell Res Ther 2017; 8:182. [PMID: 28774328 PMCID: PMC5543575 DOI: 10.1186/s13287-017-0636-9] [Citation(s) in RCA: 50] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2017] [Revised: 06/22/2017] [Accepted: 07/21/2017] [Indexed: 01/01/2023] Open
Abstract
Background Neovascularization is impaired in diabetes mellitus, which leads to the development of peripheral arterial disease and is mainly attributed to the dysfunction of endothelial progenitor cells (EPCs). Previous studies proved the promotional effect of curcumin on neovascularization in wound healing of diabetes. Thus, we hypothesize that curcumin could promote neovascularization at sites of hindlimb ischemia in diabetes and might take effect via modulating the function of EPCs. Methods Streptozotocin-induced type 1 diabetic mice and nondiabetic mice both received unilateral hindlimb ischemic surgery. Curcumin was then administrated to the mice by lavage for 14 days consecutively. Laser Doppler perfusion imaging was conducted to demonstrate the blood flow reperfusion. Capillary density was measured in the ischemic gastrocnemius muscle. In addition, angiogenesis, migration, proliferation abilities, and senescence were determined in EPCs isolated from diabetic and nondiabetic mice. Quantitative PCR was then used to determine the mRNA expression of vascular endothelial growth factor (VEGF) and angiopoetin-1 (Ang-1) in EPCs. Results Curcumin application to type 1 diabetic mice significantly improved blood reperfusion and increased the capillary density in ischemic hindlimbs. The in-vitro study also revealed that the angiogenesis, migration, and proliferation abilities of EPCs and the number of senescent EPCs were reversed by curcumin application. Quantitative PCR confirmed the overexpression of VEGF-A and Ang-1 in EPCs after curcumin treatment. Conclusion Curcumin could enhance neovascularization via promoting the function of EPCs in a diabetic mouse hindlimb ischemia model. Electronic supplementary material The online version of this article (doi:10.1186/s13287-017-0636-9) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Jinzhi You
- Department of Cardiovascular Surgery of the First Affiliated Hospital & Institute for Cardiovascular Science, Soochow University, Suzhou, China
| | - Jiacheng Sun
- Department of Cardiovascular Surgery of the First Affiliated Hospital & Institute for Cardiovascular Science, Soochow University, Suzhou, China
| | - Teng Ma
- Department of Cardiovascular Surgery of the First Affiliated Hospital & Institute for Cardiovascular Science, Soochow University, Suzhou, China
| | - Ziying Yang
- Department of Cardiovascular Surgery of the First Affiliated Hospital & Institute for Cardiovascular Science, Soochow University, Suzhou, China
| | - Xu Wang
- Department of Cardiovascular Surgery of the First Affiliated Hospital & Institute for Cardiovascular Science, Soochow University, Suzhou, China
| | - Zhiwei Zhang
- Department of Cardiovascular Surgery of the First Affiliated Hospital & Institute for Cardiovascular Science, Soochow University, Suzhou, China
| | - Jingjing Li
- Department of Cardiovascular Surgery of the First Affiliated Hospital & Institute for Cardiovascular Science, Soochow University, Suzhou, China
| | - Longgang Wang
- Department of Cardiovascular Surgery of the First Affiliated Hospital & Institute for Cardiovascular Science, Soochow University, Suzhou, China
| | - Masaaki Ii
- Division of Research Animal Laboratory and Translational Medicine, Osaka Medical College, Osaka, Japan
| | - Junjie Yang
- Department of Cardiovascular Surgery of the First Affiliated Hospital & Institute for Cardiovascular Science, Soochow University, Suzhou, China.
| | - Zhenya Shen
- Department of Cardiovascular Surgery of the First Affiliated Hospital & Institute for Cardiovascular Science, Soochow University, Suzhou, China.
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