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Bhattacharjee S, Gao J, Lu YW, Eisa-Beygi S, Wu H, Li K, Birsner AE, Wong S, Song Y, Shyy JYJ, Cowan DB, Wei W, Aikawa M, Shi J, Chen H. Interplay Between FoxM1 and Dab2 Promotes Endothelial Cell Responses in Diabetic Wound Healing. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.02.07.579019. [PMID: 39253510 PMCID: PMC11383039 DOI: 10.1101/2024.02.07.579019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 09/11/2024]
Abstract
Diabetes mellitus can cause impaired and delayed wound healing, leading to lower extremity amputations; however, the mechanisms underlying the regulation of vascular endothelial growth factor (VEGF)-dependent angiogenesis remain uncertain and could reveal new therapeutic targets. In our study, the molecular underpinnings of endothelial dysfunction in diabetes were investigated, focusing on the roles of Disabled-2 (Dab2) and Forkhead Box M1 (FoxM1) in VEGF receptor 2 (VEGFR2) signaling and endothelial cell (EC) function. Bulk RNA-sequencing analysis identified significant downregulation of Dab2 in high concentrations glucose treated primary mouse skin ECs, simulating hyperglycemic conditions in diabetes mellitus. In diabetic mice with a genetic EC deficiency of Dab2 angiogenesis was reduced in vivo and in vitro when compared with wild-type mice. Restoration of Dab2 expression by injected mRNA-containing lipid nanoparticles rescued impaired angiogenesis and wound healing in diabetic mice. At the same time, FoxM1 was downregulated in skin ECs subjected to high glucose conditions as determined by RNA-sequencing analysis. FoxM1 was found to bind to the Dab2 promoter, regulating its expression and influencing VEGFR2 signaling. The FoxM1 inhibitor FDI-6 reduced Dab2 expression and phosphorylation of VEGFR2. These findings indicate that restoring Dab2 expression through targeted therapies can enhance angiogenesis and wound repair in diabetes. To explore this therapeutic potential, we tested LyP-1-conjugated lipid nanoparticles (LNPs) containing Dab2 or control mRNAs to target ECs and found the former significantly improved wound healing and angiogenesis in diabetic mice. This study provides evidence of the crucial roles of Dab2 and FoxM1 in diabetic endothelial dysfunction and establishes targeted delivery as a promising treatment for diabetic vascular complications.
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Affiliation(s)
- Sudarshan Bhattacharjee
- Vascular Biology Program, Boston Children's Hospital, Boston, MA 02115, USA
- Department of Surgery, Harvard Medical School, Boston, MA 02115, USA
| | - Jianing Gao
- Vascular Biology Program, Boston Children's Hospital, Boston, MA 02115, USA
- Department of Surgery, Harvard Medical School, Boston, MA 02115, USA
| | - Yao Wei Lu
- Vascular Biology Program, Boston Children's Hospital, Boston, MA 02115, USA
- Department of Surgery, Harvard Medical School, Boston, MA 02115, USA
| | - Shahram Eisa-Beygi
- Vascular Biology Program, Boston Children's Hospital, Boston, MA 02115, USA
- Department of Surgery, Harvard Medical School, Boston, MA 02115, USA
| | - Hao Wu
- Vascular Biology Program, Boston Children's Hospital, Boston, MA 02115, USA
- Department of Surgery, Harvard Medical School, Boston, MA 02115, USA
| | - Kathryn Li
- Vascular Biology Program, Boston Children's Hospital, Boston, MA 02115, USA
| | - Amy E Birsner
- Vascular Biology Program, Boston Children's Hospital, Boston, MA 02115, USA
- Department of Ophthalmology, Harvard Medical School, Boston, MA 02115, USA
| | - Scott Wong
- Vascular Biology Program, Boston Children's Hospital, Boston, MA 02115, USA
- Department of Surgery, Harvard Medical School, Boston, MA 02115, USA
| | - Yudong Song
- Center for Nanomedicine and Department of Anesthesiology, Perioperative and Pain Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115, USA
| | - John Y-J Shyy
- Division of Cardiovascular Medicine, Department of Medicine, University of California, San Diego, La Jolla, CA 92093, USA
| | - Douglas B Cowan
- Vascular Biology Program, Boston Children's Hospital, Boston, MA 02115, USA
- Department of Surgery, Harvard Medical School, Boston, MA 02115, USA
| | - Wenyi Wei
- Department of Pathology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02215, USA
| | - Masanori Aikawa
- Center for Interdisciplinary Cardiovascular Sciences, Cardiovascular Division, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115, USA
| | - Jinjun Shi
- Center for Nanomedicine and Department of Anesthesiology, Perioperative and Pain Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115, USA
| | - Hong Chen
- Vascular Biology Program, Boston Children's Hospital, Boston, MA 02115, USA
- Department of Surgery, Harvard Medical School, Boston, MA 02115, USA
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Tang Y, Zhao R, Yi M, Ge Z, Wang D, Wang G, Deng X. Multifunctional Hydrogel Enhances Inflammatory Control, Antimicrobial Activity, and Oxygenation to Promote Healing in Infectious Wounds. Biomacromolecules 2024; 25:2423-2437. [PMID: 38457661 DOI: 10.1021/acs.biomac.3c01386] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/10/2024]
Abstract
Chronic infected wounds often fail to heal through normal repair mechanisms, and the persistent response of reactive oxygen species (ROS) and inflammation is a major contributing factor to the difficulty in their healing. In this context, we developed an ROS-responsive injectable hydrogel. This hydrogel is composed of ε-polylysine grafted (EPL) with caffeic acid (CA) and hyaluronic acid (HA) grafted with phenylboronic acid (PBA). Before the gelation process, a mixture CaO2@Cur-PDA (CCP) consisting of calcium peroxide (CaO2) coated with polydopamine (PDA) and curcumin (Cur) is embedded into the hydrogel. Under the conditions of chronic refractory wound environments, the hydrogel gradually dissociates. HA mimics the function of the extracellular matrix, while the released caffeic acid-grafted ε-polylysine (CE) effectively eliminates bacteria in the wound vicinity. Additionally, released CA also clears ROS and influences macrophage polarization. Subsequently, CCP further decomposes, releasing Cur, which promotes angiogenesis. This multifunctional hydrogel accelerates the repair of diabetic skin wounds infected with Staphylococcus aureus in vivo and holds promise as a candidate dressing for the healing of chronic refractory wounds.
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Affiliation(s)
- Yunfeng Tang
- Head & Neck Oncology Ward, Cancer Center, West China Hospital, Cancer Center, Sichuan University, Chengdu 610041, China
- Department of Orthopedics, Orthopedics Research Institute, West China Hospital, Sichuan University, Chengdu 610041, China
- Trauma Medical Center, Department of Orthopedics Surgery, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Renliang Zhao
- Department of Orthopedics, Orthopedics Research Institute, West China Hospital, Sichuan University, Chengdu 610041, China
- Trauma Medical Center, Department of Orthopedics Surgery, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Min Yi
- Department of Orthopedics, Orthopedics Research Institute, West China Hospital, Sichuan University, Chengdu 610041, China
- Trauma Medical Center, Department of Orthopedics Surgery, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Zilu Ge
- Department of Orthopedics, Orthopedics Research Institute, West China Hospital, Sichuan University, Chengdu 610041, China
- Trauma Medical Center, Department of Orthopedics Surgery, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Dong Wang
- Department of Orthopedics, Orthopedics Research Institute, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Guanglin Wang
- Department of Orthopedics, Orthopedics Research Institute, West China Hospital, Sichuan University, Chengdu 610041, China
- Trauma Medical Center, Department of Orthopedics Surgery, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Xiangtian Deng
- Department of Orthopedics, Orthopedics Research Institute, West China Hospital, Sichuan University, Chengdu 610041, China
- Trauma Medical Center, Department of Orthopedics Surgery, West China Hospital, Sichuan University, Chengdu 610041, China
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Meechem MB, Jadli AS, Patel VB. Uncovering the link between diabetes and cardiovascular diseases: insights from adipose-derived stem cells. Can J Physiol Pharmacol 2024; 102:229-241. [PMID: 38198660 DOI: 10.1139/cjpp-2023-0282] [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] [Indexed: 01/12/2024]
Abstract
Cardiovascular diseases (CVDs) are the leading causes of morbidity and mortality worldwide. The escalating global occurrence of obesity and diabetes mellitus (DM) has led to a significant upsurge in individuals afflicted with CVDs. As the prevalence of CVDs continues to rise, it is becoming increasingly important to identify the underlying cellular and molecular mechanisms that contribute to their development and progression, which will help discover novel therapeutic avenues. Adipose tissue (AT) is a connective tissue that plays a crucial role in maintaining lipid and glucose homeostasis. However, when AT is exposed to diseased conditions, such as DM, this tissue will alter its phenotype to become dysfunctional. AT is now recognized as a critical contributor to CVDs, especially in patients with DM. AT is comprised of a heterogeneous cellular population, which includes adipose-derived stem cells (ADSCs). ADSCs resident in AT are believed to regulate physiological cardiac function and have potential cardioprotective roles. However, recent studies have also shown that ADSCs from various adipose tissue depots become pro-apoptotic, pro-inflammatory, less angiogenic, and lose their ability to differentiate into various cell lineages upon exposure to diabetic conditions. This review aims to summarize the current understanding of the physiological roles of ADSCs, the impact of DM on ADSC phenotypic changes, and how these alterations may contribute to the pathogenesis of CVDs.
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Affiliation(s)
- Megan B Meechem
- Department of Physiology and Pharmacology, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
- Libin Cardiovascular Institute, University of Calgary, Calgary, AB, Canada
| | - Anshul S Jadli
- Department of Physiology and Pharmacology, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
- Libin Cardiovascular Institute, University of Calgary, Calgary, AB, Canada
| | - Vaibhav B Patel
- Department of Physiology and Pharmacology, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
- Libin Cardiovascular Institute, University of Calgary, Calgary, AB, Canada
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Ceci C, Lacal PM, Barbaccia ML, Mercuri NB, Graziani G, Ledonne A. The VEGFs/VEGFRs system in Alzheimer's and Parkinson's diseases: Pathophysiological roles and therapeutic implications. Pharmacol Res 2024; 201:107101. [PMID: 38336311 DOI: 10.1016/j.phrs.2024.107101] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/06/2023] [Revised: 01/25/2024] [Accepted: 02/05/2024] [Indexed: 02/12/2024]
Abstract
The vascular endothelial growth factors (VEGFs) and their cognate receptors (VEGFRs), besides their well-known involvement in physiological angiogenesis/lymphangiogenesis and in diseases associated to pathological vessel formation, play multifaceted functions in the central nervous system (CNS). In addition to shaping brain development, by controlling cerebral vasculogenesis and regulating neurogenesis as well as astrocyte differentiation, the VEGFs/VEGFRs axis exerts essential functions in the adult brain both in physiological and pathological contexts. In this article, after describing the physiological VEGFs/VEGFRs functions in the CNS, we focus on the VEGFs/VEGFRs involvement in neurodegenerative diseases by reviewing the current literature on the rather complex VEGFs/VEGFRs contribution to the pathogenic mechanisms of Alzheimer's (AD) and Parkinson's (PD) diseases. Thereafter, based on the outcome of VEGFs/VEGFRs targeting in animal models of AD and PD, we discuss the factual relevance of pharmacological VEGFs/VEGFRs modulation as a novel and potential disease-modifying approach for these neurodegenerative pathologies. Specific VEGFRs targeting, aimed at selective VEGFR-1 inhibition, while preserving VEGFR-2 signal transduction, appears as a promising strategy to hit the molecular mechanisms underlying AD pathology. Moreover, therapeutic VEGFs-based approaches can be proposed for PD treatment, with the aim of fine-tuning their brain levels to amplify neurotrophic/neuroprotective effects while limiting an excessive impact on vascular permeability.
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Affiliation(s)
- Claudia Ceci
- Pharmacology Section, Department of Systems Medicine, University of Rome Tor Vergata, Rome, Italy
| | | | - Maria Luisa Barbaccia
- Pharmacology Section, Department of Systems Medicine, University of Rome Tor Vergata, Rome, Italy
| | - Nicola Biagio Mercuri
- Neurology Section, Department of Systems Medicine, University of Rome Tor Vergata, Rome, Italy; IRCCS Santa Lucia Foundation, Department of Experimental Neuroscience, Rome, Italy; Aligning Science Across Parkinson's (ASAP) Collaborative Research Network, Chevy Chase, MD, USA
| | - Grazia Graziani
- Pharmacology Section, Department of Systems Medicine, University of Rome Tor Vergata, Rome, Italy.
| | - Ada Ledonne
- Pharmacology Section, Department of Systems Medicine, University of Rome Tor Vergata, Rome, Italy; IRCCS Santa Lucia Foundation, Department of Experimental Neuroscience, Rome, Italy; Aligning Science Across Parkinson's (ASAP) Collaborative Research Network, Chevy Chase, MD, USA
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5
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Sun J, Wang X, He Y, Tian X, Yuan T, Yang G, Yu T. Sophoridine Counteracts Obesity via Src-Mediated Inhibition of VEGFR Expression and PI3K/AKT Phosphorylation. Int J Mol Sci 2024; 25:1206. [PMID: 38279206 PMCID: PMC10816114 DOI: 10.3390/ijms25021206] [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: 11/10/2023] [Revised: 01/04/2024] [Accepted: 01/09/2024] [Indexed: 01/28/2024] Open
Abstract
Sophoridine (SRP) is a natural quinolizidine alkaloid found in many traditional Chinese herbs, though its effect on adipose tissue is unclear. We improved serum lipid levels by administering SRP by gavage in high-fat diet (HFD)-fed C57BL/6 mice. After 11 weeks, SRP supplementation significantly reduced body weight gain and improved glucose homeostasis, while reducing subcutaneous fat and liver weight. SRP also inhibited cell proliferation and differentiation of 3T3-L1 cells. Proteomics analysis revealed that SRP inhibits adipocyte differentiation by interacting with Src, thereby suppressing vascular endothelial growth factor receptor 2 (VEGFR2) expression and PI3K/AKT phosphorylation. This study provides an empirical basis for the treatment of obesity with small molecules.
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Affiliation(s)
| | | | | | | | | | | | - Taiyong Yu
- Key Laboratory of Animal Genetics, Breeding and Reproduction of Shaanxi Province, Laboratory of Animal Fat Deposition & Muscle Development, College of Animal Science and Technology, Northwest A&F University, Yangling 712100, China; (J.S.); (X.W.); (Y.H.); (X.T.); (T.Y.); (G.Y.)
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Fan Z, Chen X, Wang L, Yu J, Zhang S, Xu C, Lin J, Lin Y, Peng F. LncRNA SNHG8 regulates the migration and angiogenesis of pHUVECs induced by high glucose via the TRPM7/ERK 1/2 signaling axis. Sci Rep 2023; 13:22485. [PMID: 38110485 PMCID: PMC10728107 DOI: 10.1038/s41598-023-49779-7] [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: 03/03/2023] [Accepted: 12/12/2023] [Indexed: 12/20/2023] Open
Abstract
This study aimed to evaluate the regulatory effect and molecular mechanism of long noncoding RNA small nucleolus RNA host gene 8 (LncRNA SNHG8) in the migration and angiogenesis of primary human umbilical vein endothelial cells (pHUVECs) under high-glucose (HG) conditions. The HG-induced endothelial injury model was established in vitro.The cell model of silencing SNHG8, overexpressing SNHG8, and silencing TRPM7 was established by transfecting SNHG8-siRNA, SNHG8 plasmid and TRPM7-siRNA into cells with liposomes.The SNHG8 level was determined through reverse transcription-quantitative polymerase chain reaction (RT-qPCR). The expression levels of transient receptor potential melastatin 7 (TRPM7), endothelial nitric oxide synthase (eNOS), p-eNOS, extracellular signal-regulated kinase 1/2(ERK1/2), and p-ERK1/2 were assessed through western blot. Nitric oxide (NO) levels were measured with DAF-FM. pHUVEC migration was examined through wound healing and Transwell assay, and pHUVEC angiogenesis was observed through a tube formation assay. Results showed that HG promoted the expression of lncRNA SNHG8 and TRPM7 and decreased the ratio of p-eNOS/eNOS and p-ERK1/2/ERK1/2 in pHUVECs . NO production, migration , and angiogenesis were inhibited in pHUVECs under HG conditions. Silencing lncRNA SNHG8 and TRPM7 could significantly reverse the HG-induced decrease in eNOS activation, NO production , migration, and angiogenesis . SNHG8 and U0126 (ERK pathway inhibitor) overexpression enhanced the HG effects, whereas using U0126 did not affect the TRPM7 expression. In conclusion, lncRNA SNHG8 participates in HG-induced endothelial cell injury and likely regulates NO production, migration, and angiogenesis of pHUVECs via the TRPM7/ERK1/2 signaling axis.
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Affiliation(s)
- Zongcheng Fan
- The First Clinical Medical College, Fujian Medical University, Fuzhou, Fujian, China
- Department of Cardiology, The Third People's Hospital of Hefei, Hefei, Anhui, China
| | - Xin Chen
- Department of Cardiology, National Regional Medical Center of Binhai Campus of the First Affiliated Hospital of Fujian Medical University, The First Affiliated Hospital of Fujian Medical University, Fuzhou, Fujian, China
| | - Laicheng Wang
- The First Clinical Medical College, Fujian Medical University, Fuzhou, Fujian, China
| | - Jianjian Yu
- The First Clinical Medical College, Fujian Medical University, Fuzhou, Fujian, China
| | - Shunpeng Zhang
- The First Clinical Medical College, Fujian Medical University, Fuzhou, Fujian, China
| | - Changsheng Xu
- Fujian Provincial Institute of Hypertension, The First Affiliated Hospital of Fujian Medical University, Fuzhou, Fujian, China
| | - Jinxiu Lin
- Department of Cardiology, National Regional Medical Center of Binhai Campus of the First Affiliated Hospital of Fujian Medical University, The First Affiliated Hospital of Fujian Medical University, Fuzhou, Fujian, China
| | - Yunchai Lin
- Department of Cardiology, National Regional Medical Center of Binhai Campus of the First Affiliated Hospital of Fujian Medical University, The First Affiliated Hospital of Fujian Medical University, Fuzhou, Fujian, China.
| | - Feng Peng
- Department of Cardiology, National Regional Medical Center of Binhai Campus of the First Affiliated Hospital of Fujian Medical University, The First Affiliated Hospital of Fujian Medical University, Fuzhou, Fujian, China.
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Patidar K, Versypt ANF. Logic-Based Modeling of Inflammatory Macrophage Crosstalk with Glomerular Endothelial Cells in Diabetic Kidney Disease. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.04.04.535594. [PMID: 37066138 PMCID: PMC10104015 DOI: 10.1101/2023.04.04.535594] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/19/2023]
Abstract
Diabetic kidney disease is a complication in 1 out of 3 patients with diabetes. Aberrant glucose metabolism in diabetes leads to an immune response causing inflammation and to structural and functional damage in the glomerular cells of the kidney. Complex cellular signaling lies at the core of metabolic and functional derangement. Unfortunately, the mechanism underlying the role of inflammation in glomerular endothelial cell dysfunction during diabetic kidney disease is not fully understood. Computational models in systems biology allow the integration of experimental evidence and cellular signaling networks to understand mechanisms involved in disease progression. We built a logic-based ordinary differential equations model to study macrophage-dependent inflammation in glomerular endothelial cells during diabetic kidney disease progression. We studied the crosstalk between macrophages and glomerular endothelial cells in the kidney using a protein signaling network stimulated with glucose and lipopolysaccharide. The network and model were built using the open-source software package Netflux. This modeling approach overcomes the complexity of studying network models and the need for extensive mechanistic details. The model simulations were fitted and validated against available biochemical data from in vitro experiments. The model identified mechanisms responsible for dysregulated signaling in macrophages and glomerular endothelial cells during diabetic kidney disease. In addition, we investigated the influence of signaling interactions and species that on glomerular endothelial cell morphology through selective knockdown and downregulation. We found that partial knockdown of VEGF receptor 1, PLC-γ, adherens junction proteins, and calcium partially recovered the endothelial cell fenestration size. Our model findings contribute to understanding signaling and molecular perturbations that affect the glomerular endothelial cells in the early stage of diabetic kidney disease.
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Fu T, Sullivan DP, Gonzalez AM, Haynes ME, Dalal PJ, Rutledge NS, Tierney AL, Yescas JA, Weber EW, Muller WA. Mechanotransduction via endothelial adhesion molecule CD31 initiates transmigration and reveals a role for VEGFR2 in diapedesis. Immunity 2023; 56:2311-2324.e6. [PMID: 37643615 DOI: 10.1016/j.immuni.2023.08.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2022] [Revised: 05/04/2023] [Accepted: 08/02/2023] [Indexed: 08/31/2023]
Abstract
Engagement of platelet endothelial cell adhesion molecule 1 (PECAM, PECAM-1, CD31) on the leukocyte pseudopod with PECAM at the endothelial cell border initiates transendothelial migration (TEM, diapedesis). We show, using fluorescence lifetime imaging microscopy (FLIM), that physical traction on endothelial PECAM during TEM initiated the endothelial signaling pathway. In this role, endothelial PECAM acted as part of a mechanotransduction complex with VE-cadherin and vascular endothelial growth factor receptor 2 (VEGFR2), and this predicted that VEGFR2 was required for efficient TEM. We show that TEM required both VEGFR2 and the ability of its Y1175 to be phosphorylated, but not VEGF or VEGFR2 endogenous kinase activity. Using inducible endothelial-specific VEGFR2-deficient mice, we show in three mouse models of inflammation that the absence of endothelial VEGFR2 significantly (by ≥75%) reduced neutrophil extravasation by selectively blocking diapedesis. These findings provide a more complete understanding of the process of transmigration and identify several potential anti-inflammatory targets.
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Affiliation(s)
- Tao Fu
- Department of Pathology, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - David P Sullivan
- Department of Pathology, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - Annette M Gonzalez
- Department of Pathology, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - Maureen E Haynes
- Department of Pathology, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - Prarthana J Dalal
- Department of Pathology, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - Nakisha S Rutledge
- Department of Pathology, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - Abigail L Tierney
- Department of Pathology, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - Julia A Yescas
- Department of Pathology, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - Evan W Weber
- Department of Pathology, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - William A Muller
- Department of Pathology, Northwestern University Feinberg School of Medicine, Chicago, IL, USA.
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Kwak E, Ahmed T, Flores PC, Ortiz HR, Langlais PR, Mythreye K, Lee NY. Beta IV spectrin inhibits the metastatic growth of melanoma by suppressing VEGFR2-driven tumor angiogenesis. Cancer Med 2023; 12:18981-18987. [PMID: 37680049 PMCID: PMC10557856 DOI: 10.1002/cam4.6522] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2023] [Revised: 08/25/2023] [Accepted: 08/30/2023] [Indexed: 09/09/2023] Open
Abstract
BACKGROUND Tumor-associated angiogenesis mediates the growth and metastasis of most solid cancers. Targeted therapies of the VEGF pathways can effectively block these processes but often fail to provide lasting benefits due to acquired resistance and complications. RESULTS Recently, we discovered βIV -spectrin as a powerful regulator of angiogenesis and potential new target. We previously reported that βIV -spectrin is dynamically expressed in endothelial cells (EC) to induce VEGFR2 protein turnover during development. Here, we explored how βIV -spectrin influences the tumor vasculature using the murine B16 melanoma model and determined that loss of EC-specific βIV -spectrin dramatically promotes tumor growth and metastasis. Intraperitoneally injected B16 cells formed larger tumors with increased tumor vessel density and greater propensity for metastatic spread particularly to the chest cavity and lung compared to control mice. These results support βIV -spectrin as a key regulator of tumor angiogenesis and a viable vascular target in cancer.
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Affiliation(s)
- Eun‐A. Kwak
- Department of PharmacologyUniversity of ArizonaTucsonArizonaUSA
| | - Tasmia Ahmed
- Department of Chemistry & BiochemistryUniversity of ArizonaTucsonArizonaUSA
| | - Paola Cruz Flores
- Department of Chemistry & BiochemistryUniversity of ArizonaTucsonArizonaUSA
| | - Hannah R. Ortiz
- Department of PharmacologyUniversity of ArizonaTucsonArizonaUSA
| | | | | | - Nam Y. Lee
- Department of PharmacologyUniversity of ArizonaTucsonArizonaUSA
- Department of Chemistry & BiochemistryUniversity of ArizonaTucsonArizonaUSA
- Comprehensive Cancer CenterUniversity of ArizonaTucsonArizonaUSA
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The Sodium-Glucose Co-Transporter 2 (SGLT2) Inhibitor Empagliflozin Reverses Hyperglycemia-Induced Monocyte and Endothelial Dysfunction Primarily through Glucose Transport-Independent but Redox-Dependent Mechanisms. J Clin Med 2023; 12:jcm12041356. [PMID: 36835891 PMCID: PMC9962711 DOI: 10.3390/jcm12041356] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2023] [Accepted: 02/02/2023] [Indexed: 02/10/2023] Open
Abstract
PURPOSE Hyperglycaemia-induced oxidative stress and inflammation contribute to vascular cell dysfunction and subsequent cardiovascular events in T2DM. Selective sodium-glucose co-transporter-2 (SGLT-2) inhibitor empagliflozin significantly improves cardiovascular mortality in T2DM patients (EMPA-REG trial). Since SGLT-2 is known to be expressed on cells other than the kidney cells, we investigated the potential ability of empagliflozin to regulate glucose transport and alleviate hyperglycaemia-induced dysfunction of these cells. METHODS Primary human monocytes were isolated from the peripheral blood of T2DM patients and healthy individuals. Primary human umbilical vein endothelial cells (HUVECs) and primary human coronary artery endothelial cells (HCAECs), and fetoplacental endothelial cells (HPECs) were used as the EC model cells. Cells were exposed to hyperglycaemic conditions in vitro in 40 ng/mL or 100 ng/mL empagliflozin. The expression levels of the relevant molecules were analysed by RT-qPCR and confirmed by FACS. Glucose uptake assays were carried out with a fluorescent derivative of glucose, 2-NBDG. Reactive oxygen species (ROS) accumulation was measured using the H2DFFDA method. Monocyte and endothelial cell chemotaxis were measured using modified Boyden chamber assays. RESULTS Both primary human monocytes and endothelial cells express SGLT-2. Hyperglycaemic conditions did not significantly alter the SGLT-2 levels in monocytes and ECs in vitro or in T2DM conditions. Glucose uptake assays carried out in the presence of GLUT inhibitors revealed that SGLT-2 inhibition very mildly, but not significantly, suppressed glucose uptake by monocytes and endothelial cells. However, we detected the significant suppression of hyperglycaemia-induced ROS accumulation in monocytes and ECs when empagliflozin was used to inhibit SGLT-2 function. Hyperglycaemic monocytes and endothelial cells readily exhibited impaired chemotaxis behaviour. The co-treatment with empagliflozin reversed the PlGF-1 resistance phenotype of hyperglycaemic monocytes. Similarly, the blunted VEGF-A responses of hyperglycaemic ECs were also restored by empagliflozin, which could be attributed to the restoration of the VEGFR-2 receptor levels on the EC surface. The induction of oxidative stress completely recapitulated most of the aberrant phenotypes exhibited by hyperglycaemic monocytes and endothelial cells, and a general antioxidant N-acetyl-L-cysteine (NAC) was able to mimic the effects of empagliflozin. CONCLUSIONS This study provides data indicating the beneficial role of empagliflozin in reversing hyperglycaemia-induced vascular cell dysfunction. Even though both monocytes and endothelial cells express functional SGLT-2, SGLT-2 is not the primary glucose transporter in these cells. Therefore, it seems likely that empagliflozin does not directly prevent hyperglycaemia-mediated enhanced glucotoxicity in these cells by inhibiting glucose uptake. We identified the reduction of oxidative stress by empagliflozin as a primary reason for the improved function of monocytes and endothelial cells in hyperglycaemic conditions. In conclusion, empagliflozin reverses vascular cell dysfunction independent of glucose transport but could partially contribute to its beneficial cardiovascular effects.
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Han C, Barakat M, DiPietro LA. Angiogenesis in Wound Repair: Too Much of a Good Thing? Cold Spring Harb Perspect Biol 2022; 14:a041225. [PMID: 35667793 PMCID: PMC9524283 DOI: 10.1101/cshperspect.a041225] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Angiogenesis, or the growth of new blood vessels from the preexisting vasculature, is a visible and important component of wound repair. When tissue damage occurs, disruption of the vasculature structure leads to hypoxia. The restoration of normoxia is essential for appropriate and durable tissue repair. Angiogenesis in wounds is regulated by endogenous proangiogenic mediators, which cause rapid growth of a new vascular bed that is much denser than that of normal tissue. Such rapid growth of the capillary bed results in capillaries that are abnormal, and the newly formed vessels are tortuous, dilated, and immature. During wound resolution, this substantial neocapillary bed is pruned back to normal density with attendant maturation. Many poorly healing wounds, including nonhealing ulcers and scars, exhibit an aberrant angiogenic response. The fine-tuning of capillary regrowth in wounds is an area of significant therapeutic potential.
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Affiliation(s)
- Chen Han
- Center for Wound Healing and Tissue Regeneration, Colleges of Dentistry and Medicine, University of Illinois Chicago, Chicago, Illinois 60612, USA
| | - May Barakat
- Center for Wound Healing and Tissue Regeneration, Colleges of Dentistry and Medicine, University of Illinois Chicago, Chicago, Illinois 60612, USA
| | - Luisa A DiPietro
- Center for Wound Healing and Tissue Regeneration, Colleges of Dentistry and Medicine, University of Illinois Chicago, Chicago, Illinois 60612, USA
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12
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Chang G, Dang Q, Liu C, Wang X, Song H, Gao H, Sun H, Zhang B, Cha D. Carboxymethyl chitosan and carboxymethyl cellulose based self-healing hydrogel for accelerating diabetic wound healing. Carbohydr Polym 2022; 292:119687. [DOI: 10.1016/j.carbpol.2022.119687] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2022] [Revised: 05/27/2022] [Accepted: 05/31/2022] [Indexed: 12/24/2022]
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13
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Betting F, Schlunck G, Agostini HT, Martin G. Methylglyoxal and high glucose inhibit VEGFR2 phosphorylation at specific tyrosine residues. Z NATURFORSCH C 2022; 77:493-500. [PMID: 35767310 DOI: 10.1515/znc-2022-0033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2022] [Accepted: 06/10/2022] [Indexed: 11/15/2022]
Abstract
Diabetes is characterized by hyperglycemia and a significant risk of vascular complications. Vascular endothelial growth factor (VEGF) and its main receptor VEGFR2 (KDR), which is highly expressed in vascular endothelial cells, are essential mediators of vascular maintenance and angiogenesis. During glycolysis after high calorie food intake, methylglyoxal (MGO) is formed and MGO blood levels are elevated in diabetes. MGO reacts with arginine residues to generate MG-H1 or with lysine residues to carboxyethyl lysine which are common components of advanced glycation end-products. Therefore, the question arises whether hyperglycemic conditions affect VEGF signaling via a ligand-independent direct modification of signaling components. As a first step, the effect of MGO on VEGFR2 activation was investigated in cultured endothelial cells from human umbilical vein by determination of VEGFR2 phosphorylation at selected tyrosine residues by ELISA and immunoblotting using phospho-specific antibodies. Phosphorylation of VEGFR2-Y996, VEGFR2-Y1054, or VEGFR2-Y1175 reached a maximum 5 min after stimulation of endothelial cells with VEGF. Phosphorylation was significantly inhibited by 100 µM MGO and to a lesser extent by high glucose treatment. 2,3-Pentanedione and glyoxal were investigated for comparison. In summary, VEGFR2 phosphorylation is sensitive to MGO or high glucose concentrations which may be relevant in the pathophysiology of microvascular disease in diabetes.
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Affiliation(s)
- Fabian Betting
- Eye Center, Medical Center, Medical Faculty, University of Freiburg, Freiburg, Germany
| | - Günther Schlunck
- Eye Center, Medical Center, Medical Faculty, University of Freiburg, Freiburg, Germany
| | - Hansjürgen T Agostini
- Eye Center, Medical Center, Medical Faculty, University of Freiburg, Freiburg, Germany
| | - Gottfried Martin
- Eye Center, Medical Center, Medical Faculty, University of Freiburg, Freiburg, Germany
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14
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Grismaldo A, Sobrevia L, Morales L. Role of platelet-derived growth factor c on endothelial dysfunction in cardiovascular diseases. Biochim Biophys Acta Gen Subj 2022; 1866:130188. [PMID: 35691459 DOI: 10.1016/j.bbagen.2022.130188] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2022] [Revised: 06/02/2022] [Accepted: 06/05/2022] [Indexed: 01/01/2023]
Abstract
Loss of endothelial function is a common feature to all cardiovascular diseases (CVDs). One of the risk factors associated with the development of CVDs is the hyperglycaemia that occurs in patients with metabolic disorders such as Type 1 and Type 2 diabetes mellitus. Hyperglycaemia causes endothelial dysfunction through increased production of reactive oxygen species (ROS) from different cellular sources leading to oxidative stress. Vascular endothelial growth factor (VEGF) is essential in the stimulation and maintenance of endothelial functional aspects and, although it can mitigate the impact of ROS, VEGF-mediated signalling is partially inhibited in diabetes mellitus. The search for therapeutic strategies that preserve, protect and improve the functions of the endothelium is of great relevance in the investigation of CVDs associated with hyperglycaemia. Platelet-derived growth factor C (PDGF-C) is a peptide with angiogenic properties, independent of VEGF, that stimulates angiogenesis and revascularization of ischemic tissue. In a diabetic mouse model, PDGF-C stimulates mature endothelial cell migration, angiogenesis, endothelial progenitor cell mobilization, and increased neovascularization, and protects blood vessels in a retinal degeneration model activating anti-apoptosis and proliferation signalling pathways in endothelial cells. This review summarizes the information on the damage that high d-glucose causes on endothelial function and the beneficial effects that PDGF-CC could exert in this condition.
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Affiliation(s)
- Adriana Grismaldo
- Experimental and Computational Biochemistry Group, Faculty of Sciences, Nutrition and Biochemistry Department, Pontificia Universidad Javeriana, Bogotá, DC, Colombia; Cellular and Molecular Physiology Laboratory, Department of Obstetrics, Division of Obstetrics and Gynaecology, School of Medicine, Faculty of Medicine, Pontificia Universidad Católica de Chile, Santiago 8330024, Chile.
| | - Luis Sobrevia
- Cellular and Molecular Physiology Laboratory, Department of Obstetrics, Division of Obstetrics and Gynaecology, School of Medicine, Faculty of Medicine, Pontificia Universidad Católica de Chile, Santiago 8330024, Chile; Department of Physiology, Faculty of Pharmacy, Universidad de Sevilla, Seville E-41012, Spain; Medical School (Faculty of Medicine), Sao Paulo State University (UNESP), Brazil; University of Queensland Centre for Clinical Research (UQCCR), Faculty of Medicine and Biomedical Sciences, University of Queensland, Herston, QLD 4029, Australia; Department of Pathology and Medical Biology, University of Groningen, University Medical Center Groningen, 9713GZ Groningen, the Netherlands; Tecnologico de Monterrey, Eutra, The Institute for Obesity Research (IOR), School of Medicine and Health Sciences, Monterrey, Nuevo León. Mexico..
| | - Ludis Morales
- Experimental and Computational Biochemistry Group, Faculty of Sciences, Nutrition and Biochemistry Department, Pontificia Universidad Javeriana, Bogotá, DC, Colombia.
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15
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Grismaldo Rodríguez A, Zamudio Rodríguez JA, Mendieta CV, Quijano Gómez S, Sanabria Barrera S, Morales Álvarez L. Effect of Platelet-Derived Growth Factor C on Mitochondrial Oxidative Stress Induced by High d-Glucose in Human Aortic Endothelial Cells. Pharmaceuticals (Basel) 2022; 15:ph15050639. [PMID: 35631465 PMCID: PMC9143891 DOI: 10.3390/ph15050639] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2022] [Revised: 05/05/2022] [Accepted: 05/06/2022] [Indexed: 12/10/2022] Open
Abstract
Endothelial dysfunction is an early marker for cardiovascular diseases. Hyperglycemia induces endothelial dysfunction, increasing the production of reactive oxygen species. Platelet-derived growth factor C stimulates angiogenesis and revascularization in ischemic tissues of diabetic mice and promotes the migration of progenitors and mature ECs to injury sites; however, the molecular mechanisms of its actions are not described yet. Here, we evaluated the effect of PDGF-C on oxidative stress induced by HG. Human aortic endothelial cells were grown in glucose concentrations ranging from 5 mmol/L to 35 mmol/L for 1 to 24 h. Treatment with 50 ng/mL PDGF-C was done for 1 to 3 h. Cytosolic and mitochondrial ROS were measured by fluorometry, and the expression of antioxidant enzymes was evaluated by Western blot. Nrf2 and Keap1 expression was assessed by real-time PCR. High glucose induced mitochondrial ROS production. PDGF-C diminished the oxidative stress induced by high glucose, increasing SOD2 expression and SOD activity, and modulating the Keap1 expression gene. These results give new evidence about the mitochondrial antioxidant effect that PDGF-C could exert on endothelial cells exposed to high glucose and its considerable role as a therapeutic target in diabetes.
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Affiliation(s)
- Adriana Grismaldo Rodríguez
- Experimental and Computational Biochemistry Group, Faculty of Sciences, Nutrition and Biochemistry Department, Pontificia Universidad Javeriana, Bogotá 110231, Colombia; (J.A.Z.R.); (C.V.M.)
- Correspondence: (A.G.R.); (L.M.Á.); Tel.: +57-3114566976 (A.G.R.); +57-3132107272 (L.M.Á.)
| | - Jairo A. Zamudio Rodríguez
- Experimental and Computational Biochemistry Group, Faculty of Sciences, Nutrition and Biochemistry Department, Pontificia Universidad Javeriana, Bogotá 110231, Colombia; (J.A.Z.R.); (C.V.M.)
| | - Cindy V. Mendieta
- Experimental and Computational Biochemistry Group, Faculty of Sciences, Nutrition and Biochemistry Department, Pontificia Universidad Javeriana, Bogotá 110231, Colombia; (J.A.Z.R.); (C.V.M.)
- Department of Clinical Epidemiology and Biostatistics, Pontificia Universidad Javeriana, Bogotá 110231, Colombia
| | - Sandra Quijano Gómez
- Immunology and Cell Biology Group, Faculty of Sciences, Microbiology Department, Pontificia Universidad Javeriana, Bogotá 110231, Colombia;
| | - Sandra Sanabria Barrera
- Traslational Biomedical Research Group, Fundación Cardiovascular de Colombia, Floridablanca 680004, Colombia;
| | - Ludis Morales Álvarez
- Experimental and Computational Biochemistry Group, Faculty of Sciences, Nutrition and Biochemistry Department, Pontificia Universidad Javeriana, Bogotá 110231, Colombia; (J.A.Z.R.); (C.V.M.)
- Correspondence: (A.G.R.); (L.M.Á.); Tel.: +57-3114566976 (A.G.R.); +57-3132107272 (L.M.Á.)
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16
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Miller B, Sewell-Loftin MK. Mechanoregulation of Vascular Endothelial Growth Factor Receptor 2 in Angiogenesis. Front Cardiovasc Med 2022; 8:804934. [PMID: 35087885 PMCID: PMC8787114 DOI: 10.3389/fcvm.2021.804934] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2021] [Accepted: 12/10/2021] [Indexed: 12/17/2022] Open
Abstract
The endothelial cells that compose the vascular system in the body display a wide range of mechanotransductive behaviors and responses to biomechanical stimuli, which act in concert to control overall blood vessel structure and function. Such mechanosensitive activities allow blood vessels to constrict, dilate, grow, or remodel as needed during development as well as normal physiological functions, and the same processes can be dysregulated in various disease states. Mechanotransduction represents cellular responses to mechanical forces, translating such factors into chemical or electrical signals which alter the activation of various cell signaling pathways. Understanding how biomechanical forces drive vascular growth in healthy and diseased tissues could create new therapeutic strategies that would either enhance or halt these processes to assist with treatments of different diseases. In the cardiovascular system, new blood vessel formation from preexisting vasculature, in a process known as angiogenesis, is driven by vascular endothelial growth factor (VEGF) binding to VEGF receptor 2 (VEGFR-2) which promotes blood vessel development. However, physical forces such as shear stress, matrix stiffness, and interstitial flow are also major drivers and effectors of angiogenesis, and new research suggests that mechanical forces may regulate VEGFR-2 phosphorylation. In fact, VEGFR-2 activation has been linked to known mechanobiological agents including ERK/MAPK, c-Src, Rho/ROCK, and YAP/TAZ. In vascular disease states, endothelial cells can be subjected to altered mechanical stimuli which affect the pathways that control angiogenesis. Both normalizing and arresting angiogenesis associated with tumor growth have been strategies for anti-cancer treatments. In the field of regenerative medicine, harnessing biomechanical regulation of angiogenesis could enhance vascularization strategies for treating a variety of cardiovascular diseases, including ischemia or permit development of novel tissue engineering scaffolds. This review will focus on the impact of VEGFR-2 mechanosignaling in endothelial cells (ECs) and its interaction with other mechanotransductive pathways, as well as presenting a discussion on the relationship between VEGFR-2 activation and biomechanical forces in the extracellular matrix (ECM) that can help treat diseases with dysfunctional vascular growth.
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Affiliation(s)
- Bronte Miller
- Department of Biomedical Engineering, University of Alabama at Birmingham, Birmingham, AL, United States
| | - Mary Kathryn Sewell-Loftin
- Department of Biomedical Engineering, University of Alabama at Birmingham, Birmingham, AL, United States.,O'Neal Comprehensive Cancer Center, University of Alabama at Birmingham, Birmingham, AL, United States
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17
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Mossanen Parsi M, Duval C, Ariëns RAS. Vascular Dementia and Crosstalk Between the Complement and Coagulation Systems. Front Cardiovasc Med 2021; 8:803169. [PMID: 35004913 PMCID: PMC8733168 DOI: 10.3389/fcvm.2021.803169] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2021] [Accepted: 11/29/2021] [Indexed: 01/12/2023] Open
Abstract
Vascular Dementia (VaD) is a neurocognitive disorder caused by reduced blood flow to the brain tissue, resulting in infarction, and is the second most common type of dementia. The complement and coagulation systems are evolutionary host defence mechanisms activated by acute tissue injury to induce inflammation, clot formation and lysis; recent studies have revealed that these systems are closely interlinked. Overactivation of these systems has been recognised to play a key role in the pathogenesis of neurological disorders such as Alzheimer's disease and multiple sclerosis, however their role in VaD has not yet been extensively reviewed. This review aims to bridge the gap in knowledge by collating current understanding of VaD to enable identification of complement and coagulation components involved in the pathogenesis of this disorder that may have their effects amplified or supressed by crosstalk. Exploration of these mechanisms may unveil novel therapeutic targets or biomarkers that would improve current treatment strategies for VaD.
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Affiliation(s)
| | | | - Robert A. S. Ariëns
- Discovery and Translational Science Department, School of Medicine, Leeds Institute of Cardiovascular and Metabolic Medicine, University of Leeds, Leeds, United Kingdom
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18
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Qi Y, Qian K, Chen J, E Y, Shi Y, Li H, Zhao L. A thermoreversible antibacterial zeolite-based nanoparticles loaded hydrogel promotes diabetic wound healing via detrimental factor neutralization and ROS scavenging. J Nanobiotechnology 2021; 19:414. [PMID: 34895257 PMCID: PMC8665638 DOI: 10.1186/s12951-021-01151-5] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2021] [Accepted: 11/18/2021] [Indexed: 12/26/2022] Open
Abstract
BACKGROUND As recovery time of diabetic wound injury is prolonged by the production of detrimental factors, including reactive oxygen species (ROS) and inflammatory cytokines, attenuating the oxidative stress and inflammatory reactions in the microenvironment of the diabetic wound site would be significant. EXPERIMENTAL DESIGN In our study, we prepared thermoreversible, antibacterial zeolite-based nanoparticles loaded hydrogel to promote diabetic wound healing via the neutralization of detrimental factors such as inflammatory cytokines and ROS. RESULTS The cerium (Ce)-doped biotype Linde type A (LTA) zeolite nanoparticles synergistically eliminated mitochondrial ROS and neutralized free inflammatory factors, thus remodeling the anti-inflammatory microenvironment of the wound and enhancing angiogenesis. Moreover, the thermoreversible hydrogel composed of Pluronic F127 and chitosan demonstrated strong haemostatic and bactericidal behavior. CONCLUSIONS In conclusion, the obtained thermoreversible, antibacterial, zeolite-based nanoparticles loaded hydrogels represent a multi-targeted combination therapy for diabetic wound healing.
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Affiliation(s)
- Yao Qi
- School of Pharmacy, Jinzhou Medical University, Jinzhou, 121000 People’s Republic of China
| | - Kun Qian
- Department of Chemistry, Jinzhou Medical University, Jinzhou, 121000 People’s Republic of China
| | - Jin Chen
- School of Pharmacy, Jinzhou Medical University, Jinzhou, 121000 People’s Republic of China
| | - Yifeng E
- School of Pharmacy, Jinzhou Medical University, Jinzhou, 121000 People’s Republic of China
| | - Yijie Shi
- School of Pharmacy, Jinzhou Medical University, Jinzhou, 121000 People’s Republic of China
| | - Hongdan Li
- Life Science Institute, Jinzhou Medical University, Jinzhou, 121000 People’s Republic of China
| | - Liang Zhao
- School of Pharmacy, Jinzhou Medical University, Jinzhou, 121000 People’s Republic of China
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19
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Wang H, Pei S, Fang S, Jin S, Deng S, Zhao Y, Feng Y. Irisin restores high glucose-induced cell injury in vascular endothelial cells by activating Notch pathway via Notch receptor 1. Biosci Biotechnol Biochem 2021; 85:2093-2102. [PMID: 34329390 DOI: 10.1093/bbb/zbab137] [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: 03/26/2021] [Accepted: 07/19/2021] [Indexed: 01/12/2023]
Abstract
Diabetic foot ulcers (DFU) are a vascular complication of diabetes mellitus (DM). It has been confirmed that irisin is closely related to DM. However, the effect of irisin on DFU is obscure and needs further study. After human umbilical vein endothelial cell lines (HUVECs) were treated with different concentrations' irisin, normal glucose, high glucose (HG), HG plus irisin-high (H) or sh-Notch1, cell biological behaviors, LDH, and VEGFA were detected by cell function experiments. Apoptosis- and Notch pathway-related protein levels were evaluated by Western blot. Irisin has no cytotoxicity, and irisin-H elevated cell viability and inhibited apoptosis and LDH level in HG-induced HUVECs. Meanwhile, irisin-H restored HG-repressed migration and angiogenesis in HUVECs. Irisin-H inhibited apoptosis-related protein levels and promoted VEGFA and Notch pathway-related protein levels in HG-treated HUVECs. Additionally, sh-Notch1 reversed the protective effect of irisin-H in HG-treated HUVECs. Irisin restores HG-induced cell injury and angiogenesis in HUVECs by activating Notch pathway via Notch1.
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Affiliation(s)
- Hanrui Wang
- Departement of Vascular Surgery, The First Affiliated Hospital of Jiamusi University, Jiamusi University, Jiamusi, Heilongjiang, China
| | - Siying Pei
- Department of Biochemistry, School of Basic Medical Science, Jiamusi University, Jiamusi, Heilongjiang, China
| | - Shuqing Fang
- Department of Nephrology, The Central Hospital of Jia Mu Si City, Jiamusi, Heilongjiang, China
| | - Song Jin
- Departement of Vascular Surgery, The First Affiliated Hospital of Jiamusi University, Jiamusi University, Jiamusi, Heilongjiang, China
| | - Shuhua Deng
- Nursing Department, The Central Hospital of Jia Mu Si City, Jiamusi, Heilongjiang, China
| | - Yanan Zhao
- Department of Internal Medicine, Hospital of Traditional Chinese Medicine of Qingan County, Suihua, Heilongjiang, China
| | - Yao Feng
- Department of TCM, The First Affiliated Hospital of Jiamusi University; Jiamusi University, Jiamusi, Heilongjiang, China
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20
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Durante W, Behnammanesh G, Peyton KJ. Effects of Sodium-Glucose Co-Transporter 2 Inhibitors on Vascular Cell Function and Arterial Remodeling. Int J Mol Sci 2021; 22:ijms22168786. [PMID: 34445519 PMCID: PMC8396183 DOI: 10.3390/ijms22168786] [Citation(s) in RCA: 47] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2021] [Revised: 08/10/2021] [Accepted: 08/11/2021] [Indexed: 12/20/2022] Open
Abstract
Cardiovascular disease is the leading cause of morbidity and mortality in diabetes. Recent clinical studies indicate that sodium-glucose co-transporter 2 (SGLT2) inhibitors improve cardiovascular outcomes in patients with diabetes. The mechanism underlying the beneficial effect of SGLT2 inhibitors is not completely clear but may involve direct actions on vascular cells. SGLT2 inhibitors increase the bioavailability of endothelium-derived nitric oxide and thereby restore endothelium-dependent vasodilation in diabetes. In addition, SGLT2 inhibitors favorably regulate the proliferation, migration, differentiation, survival, and senescence of endothelial cells (ECs). Moreover, they exert potent antioxidant and anti-inflammatory effects in ECs. SGLT2 inhibitors also inhibit the contraction of vascular smooth muscle cells and block the proliferation and migration of these cells. Furthermore, studies demonstrate that SGLT2 inhibitors prevent postangioplasty restenosis, maladaptive remodeling of the vasculature in pulmonary arterial hypertension, the formation of abdominal aortic aneurysms, and the acceleration of arterial stiffness in diabetes. However, the role of SGLT2 in mediating the vascular actions of these drugs remains to be established as important off-target effects of SGLT2 inhibitors have been identified. Future studies distinguishing drug- versus class-specific effects may optimize the selection of specific SGLT2 inhibitors in patients with distinct cardiovascular pathologies.
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21
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Sharma S, Brown CE. Microvascular basis of cognitive impairment in type 1 diabetes. Pharmacol Ther 2021; 229:107929. [PMID: 34171341 DOI: 10.1016/j.pharmthera.2021.107929] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2021] [Revised: 04/23/2021] [Accepted: 05/19/2021] [Indexed: 02/07/2023]
Abstract
The complex computations of the brain require a constant supply of blood flow to meet its immense metabolic needs. Perturbations in blood supply, even in the smallest vascular networks, can have a profound effect on neuronal function and cognition. Type 1 diabetes is a prevalent and insidious metabolic disorder that progressively and heterogeneously disrupts vascular signalling and function in the brain. As a result, it is associated with an array of adverse vascular changes such as impaired regulation of vascular tone, pathological neovascularization and vasoregression, capillary plugging and blood brain barrier disruption. In this review, we highlight the link between microvascular dysfunction and cognitive impairment that is commonly associated with type 1 diabetes, with the aim of synthesizing current knowledge in this field.
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Affiliation(s)
- Sorabh Sharma
- Division of Medical Sciences, University of Victoria, Victoria, BC, Canada
| | - Craig E Brown
- Division of Medical Sciences, University of Victoria, Victoria, BC, Canada; Department of Psychiatry, University of British Columbia, Vancouver, BC, Canada.
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22
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Ash D, Sudhahar V, Youn SW, Okur MN, Das A, O'Bryan JP, McMenamin M, Hou Y, Kaplan JH, Fukai T, Ushio-Fukai M. The P-type ATPase transporter ATP7A promotes angiogenesis by limiting autophagic degradation of VEGFR2. Nat Commun 2021; 12:3091. [PMID: 34035268 PMCID: PMC8149886 DOI: 10.1038/s41467-021-23408-1] [Citation(s) in RCA: 39] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2020] [Accepted: 04/26/2021] [Indexed: 01/05/2023] Open
Abstract
VEGFR2 (KDR/Flk1) signaling in endothelial cells (ECs) plays a central role in angiogenesis. The P-type ATPase transporter ATP7A regulates copper homeostasis, and its role in VEGFR2 signaling and angiogenesis is entirely unknown. Here, we describe the unexpected crosstalk between the Copper transporter ATP7A, autophagy, and VEGFR2 degradation. The functional significance of this Copper transporter was demonstrated by the finding that inducible EC-specific ATP7A deficient mice or ATP7A-dysfunctional ATP7Amut mice showed impaired post-ischemic neovascularization. In ECs, loss of ATP7A inhibited VEGF-induced VEGFR2 signaling and angiogenic responses, in part by promoting ligand-induced VEGFR2 protein degradation. Mechanistically, VEGF stimulated ATP7A translocation from the trans-Golgi network to the plasma membrane where it bound to VEGFR2, which prevented autophagy-mediated lysosomal VEGFR2 degradation by inhibiting autophagic cargo/adapter p62/SQSTM1 binding to ubiquitinated VEGFR2. Enhanced autophagy flux due to ATP7A dysfunction in vivo was confirmed by autophagy reporter CAG-ATP7Amut -RFP-EGFP-LC3 transgenic mice. In summary, our study uncovers a novel function of ATP7A to limit autophagy-mediated degradation of VEGFR2, thereby promoting VEGFR2 signaling and angiogenesis, which restores perfusion recovery and neovascularization. Thus, endothelial ATP7A is identified as a potential therapeutic target for treatment of ischemic cardiovascular diseases.
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Affiliation(s)
- Dipankar Ash
- Vascular Biology Center, Medical College of Georgia at Augusta University, Augusta, GA, USA
| | - Varadarajan Sudhahar
- Vascular Biology Center, Medical College of Georgia at Augusta University, Augusta, GA, USA
- Charlie Norwood Veterans Affairs Medical Center, Augusta, GA, USA
| | - Seock-Won Youn
- Vascular Biology Center, Medical College of Georgia at Augusta University, Augusta, GA, USA
- Department of Physiology and Biophysics, University of Illinois College of Medicine, Chicago, IL, USA
| | - Mustafa Nazir Okur
- Laboratory of Molecular Gerontology, National Institute on Aging, National Institutes of Health, Baltimore, MD, USA
| | - Archita Das
- Vascular Biology Center, Medical College of Georgia at Augusta University, Augusta, GA, USA
| | - John P O'Bryan
- Department of Cell and Molecular Pharmacology and Experimental Therapeutics, Hollings Cancer Center, Medical University of South Carolina, Charleston, SC, USA
- Ralph H. Johnson VA Medical Center, Charleston, SC, USA
| | - Maggie McMenamin
- Vascular Biology Center, Medical College of Georgia at Augusta University, Augusta, GA, USA
- Charlie Norwood Veterans Affairs Medical Center, Augusta, GA, USA
| | - Yali Hou
- Vascular Biology Center, Medical College of Georgia at Augusta University, Augusta, GA, USA
- Charlie Norwood Veterans Affairs Medical Center, Augusta, GA, USA
| | - Jack H Kaplan
- Department of Biochemistry and Molecular Genetics, University of Illinois College of Medicine, Chicago, IL, USA
| | - Tohru Fukai
- Vascular Biology Center, Medical College of Georgia at Augusta University, Augusta, GA, USA.
- Charlie Norwood Veterans Affairs Medical Center, Augusta, GA, USA.
- Departments of Pharmacology and Toxicology, Medical College of Georgia at Augusta University, Augusta, GA, USA.
| | - Masuko Ushio-Fukai
- Vascular Biology Center, Medical College of Georgia at Augusta University, Augusta, GA, USA.
- Department of Medicine (Cardiology), Medical College of Georgia at Augusta University, Augusta, GA, USA.
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23
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Tamamouna V, Rahman MM, Petersson M, Charalambous I, Kux K, Mainor H, Bolender V, Isbilir B, Edgar BA, Pitsouli C. Remodelling of oxygen-transporting tracheoles drives intestinal regeneration and tumorigenesis in Drosophila. Nat Cell Biol 2021; 23:497-510. [PMID: 33972730 PMCID: PMC8567841 DOI: 10.1038/s41556-021-00674-1] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2020] [Accepted: 03/31/2021] [Indexed: 02/03/2023]
Abstract
The Drosophila trachea, as the functional equivalent of mammalian blood vessels, senses hypoxia and oxygenates the body. Here, we show that the adult intestinal tracheae are dynamic and respond to enteric infection, oxidative agents and tumours with increased terminal branching. Increased tracheation is necessary for efficient damage-induced intestinal stem cell (ISC)-mediated regeneration and is sufficient to drive ISC proliferation in undamaged intestines. Gut damage or tumours induce HIF-1α (Sima in Drosophila), which stimulates tracheole branching via the FGF (Branchless (Bnl))-FGFR (Breathless (Btl)) signalling cascade. Bnl-Btl signalling is required in the intestinal epithelium and the trachea for efficient damage-induced tracheal remodelling and ISC proliferation. Chemical or Pseudomonas-generated reactive oxygen species directly affect the trachea and are necessary for branching and intestinal regeneration. Similarly, tracheole branching and the resulting increase in oxygenation are essential for intestinal tumour growth. We have identified a mechanism of tracheal-intestinal tissue communication, whereby damage and tumours induce neo-tracheogenesis in Drosophila, a process reminiscent of cancer-induced neoangiogenesis in mammals.
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Affiliation(s)
- Vasilia Tamamouna
- University of Cyprus, Department of Biological Sciences, 1 Panepistimiou Avenue, 2109 Aglantzia, Cyprus
| | - M. Mahidur Rahman
- Huntsman Cancer Institute, Department of Oncological Sciences, University of Utah, Salt Lake City, UT 84112, USA
| | - Monika Petersson
- German Cancer Research Center (DKFZ)-Center for Molecular Biology (ZMBH), University of Heidelberg Alliance, Im Neuenheimer Feld 282, 69120 Heidelberg, Germany
| | - Irini Charalambous
- University of Cyprus, Department of Biological Sciences, 1 Panepistimiou Avenue, 2109 Aglantzia, Cyprus
| | - Kristina Kux
- University of Cyprus, Department of Biological Sciences, 1 Panepistimiou Avenue, 2109 Aglantzia, Cyprus
| | - Hannah Mainor
- Huntsman Cancer Institute, Department of Oncological Sciences, University of Utah, Salt Lake City, UT 84112, USA
| | - Verena Bolender
- German Cancer Research Center (DKFZ)-Center for Molecular Biology (ZMBH), University of Heidelberg Alliance, Im Neuenheimer Feld 282, 69120 Heidelberg, Germany
| | - Buse Isbilir
- German Cancer Research Center (DKFZ)-Center for Molecular Biology (ZMBH), University of Heidelberg Alliance, Im Neuenheimer Feld 282, 69120 Heidelberg, Germany
| | - Bruce A. Edgar
- Huntsman Cancer Institute, Department of Oncological Sciences, University of Utah, Salt Lake City, UT 84112, USA,Corresponding authors ,
| | - Chrysoula Pitsouli
- University of Cyprus, Department of Biological Sciences, 1 Panepistimiou Avenue, 2109 Aglantzia, Cyprus,Corresponding authors ,
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Shao JW, Wang JD, He Q, Yang Y, Zou YY, Su W, Xiang ST, Li JB, Fang J. Three-dimensional-arterial spin labeling perfusion correlation with diabetes-associated cognitive dysfunction and vascular endothelial growth factor in type 2 diabetes mellitus rat. World J Diabetes 2021; 12:499-513. [PMID: 33889293 PMCID: PMC8040076 DOI: 10.4239/wjd.v12.i4.499] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/12/2020] [Revised: 01/12/2021] [Accepted: 03/08/2021] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Type 2 diabetes mellitus (T2DM) has been strongly associated with an increased risk of developing cognitive dysfunction and dementia. The mechanisms of diabetes-associated cognitive dysfunction (DACD) have not been fully elucidated to date. Some studies proved lower cerebral blood flow (CBF) in the hippocampus was associated with poor executive function and memory in T2DM. Increasing evidence showed that diabetes leads to abnormal vascular endothelial growth factor (VEGF) expression and CBF changes in humans and animal models. In this study, we hypothesized that DACD was correlated with CBF alteration as measured by three-dimensional (3D) arterial spin labeling (3D-ASL) and VEGF expression in the hippocampus.
AIM To assess the correlation between CBF (measured by 3D-ASL and VEGF expression) and DACD in a rat model of T2DM.
METHODS Forty Sprague-Dawley male rats were divided into control and T2DM groups. The T2DM group was established by feeding rats a high-fat diet and glucose to induce impaired glucose tolerance and then injecting them with streptozotocin to induce T2DM. Cognitive function was assessed using the Morris water maze experiment. The CBF changes were measured by 3D-ASL magnetic resonance imaging. VEGF expression was determined using immunofluorescence.
RESULTS The escape latency time significantly reduced 15 wk after streptozotocin injection in the T2DM group. The total distance traveled was longer in the T2DM group; also, the platform was crossed fewer times. The percentage of distance in the target zone significantly decreased. CBF decreased in the bilateral hippocampus in the T2DM group. No difference was found between the right CBF value and the left CBF value in the T2DM group. The VEGF expression level in the hippocampus was lower in the T2DM group and correlated with the CBF value. The escape latency negatively correlated with the CBF value. The number of rats crossing the platform positively correlated with the CBF value.
CONCLUSION Low CBF in the hippocampus and decreased VEGF expression might be crucial in DACD. CBF measured by 3D-ASL might serve as a noninvasive imaging biomarker for cognitive impairment associated with T2DM.
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Affiliation(s)
- Ju-Wei Shao
- Department of Radiology, The Second People’s Hospital of Yunnan Province, The Affiliated Hospital of Yunnan University, Kunming 650021, Yunnan Province, China
- College of Public Health, Kunming Medical University, Kunming 650500, Yunnan Province, China
| | - Jin-De Wang
- College of Clinical Medicine, Kunming Medical University, Kunming 650500, Yunnan Province, China
| | - Qian He
- Department of Radiology, The Second People’s Hospital of Yunnan Province, The Affiliated Hospital of Yunnan University, Kunming 650021, Yunnan Province, China
| | - Ying Yang
- Department of Endocrinology and Metabolism, The Second People’s Hospital of Yunnan Province, The Affiliated Hospital of Yunnan University, Kunming 650021, Yunnan Province, China
| | - Ying-Ying Zou
- Department of Pathology and Pathophysiology, Kunming Medical University, Kunming 650021, Yunnan Province, China
| | - Wei Su
- Department of Radiology, The Second People’s Hospital of Yunnan Province, The Affiliated Hospital of Yunnan University, Kunming 650021, Yunnan Province, China
| | - Shu-Tian Xiang
- Department of Radiology, The Second People’s Hospital of Yunnan Province, The Affiliated Hospital of Yunnan University, Kunming 650021, Yunnan Province, China
| | - Jian-Bo Li
- Department of Radiology, The Second People’s Hospital of Yunnan Province, The Affiliated Hospital of Yunnan University, Kunming 650021, Yunnan Province, China
| | - Jing Fang
- Institute for Health Sciences, Kunming Medical University, Kunming 650500, Yunnan Province, China
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25
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Yin M, Wang X, Yu Z, Wang Y, Wang X, Deng M, Zhao D, Ji S, Jia N, Zhang W. γ-PGA hydrogel loaded with cell-free fat extract promotes the healing of diabetic wounds. J Mater Chem B 2021; 8:8395-8404. [PMID: 32966542 DOI: 10.1039/d0tb01190h] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Diabetic wounds are one complication of persistent hyperglycemia and lead to neuropathy and vascular lesions in patients. The promotion of angiogenesis plays an important role in wound healing. Cell-free fat extract (Ceffe) is a cell-free fraction isolated from adipose that is enriched with a range of growth factors, the combination of which can synergistically induce angiogenesis. In this study, we prepared a wound dressing by loading Ceffe with the γ-PGA hydrogel (Ceffe-γ-PGA) to promote the healing of wounds in diabetic mice. The viscosity of Ceffe-γ-PGA was 9.2 pa s, and the water retention rate after 6 hours reached 50%. The slow-release effect of the Ceffe-γ-PGA hydrogel was investigated in vitro in PBS, and the cumulative release rate was 97% after 6 days. Water retention and viscosity analyses revealed that Ceffe-γ-PGA provided a moist environment for the wound surface. The therapeutic effect of the Ceffe-γ-PGA hydrogel on wound healing was studied in vivo in type-II diabetic male db/db mice. After 17 days of wound treatment, the wound area ratio of the Ceffe-γ-PGA group was reduced to 2% of the original, and the capillary density of the Ceffe-γ-PGA group reached 33 mm-2 and was 19 mm-2 higher than that of the untreated group. The cell proliferation rate in the Ceffe-γ-PGA group was 37% higher than that in the untreated group. These results support the use of this system as a promising therapeutic strategy for wound healing in patients with diabetes.
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Affiliation(s)
- Mengting Yin
- The Education Ministry Key Laboratory of Resource Chemistry, Shanghai Key Laboratory of Rare Earth Functional Materials, College of Chemistry and Materials Science, Shanghai Normal University, Shanghai 200234, P. R. China.
| | - Xiangsheng Wang
- Department of Plastic and Reconstructive Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Tissue Engineering, Shanghai 200011, China.
| | - Ziyou Yu
- Department of Plastic and Reconstructive Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Tissue Engineering, Shanghai 200011, China.
| | - Yun Wang
- Department of Plastic and Reconstructive Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Tissue Engineering, Shanghai 200011, China.
| | - Xiansong Wang
- Department of Plastic and Reconstructive Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Tissue Engineering, Shanghai 200011, China.
| | - Mingwu Deng
- Department of Plastic and Reconstructive Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Tissue Engineering, Shanghai 200011, China.
| | - Danyang Zhao
- The Education Ministry Key Laboratory of Resource Chemistry, Shanghai Key Laboratory of Rare Earth Functional Materials, College of Chemistry and Materials Science, Shanghai Normal University, Shanghai 200234, P. R. China.
| | - Shaowei Ji
- The Education Ministry Key Laboratory of Resource Chemistry, Shanghai Key Laboratory of Rare Earth Functional Materials, College of Chemistry and Materials Science, Shanghai Normal University, Shanghai 200234, P. R. China.
| | - Nengqing Jia
- The Education Ministry Key Laboratory of Resource Chemistry, Shanghai Key Laboratory of Rare Earth Functional Materials, College of Chemistry and Materials Science, Shanghai Normal University, Shanghai 200234, P. R. China.
| | - Wenjie Zhang
- Department of Plastic and Reconstructive Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Tissue Engineering, Shanghai 200011, China.
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Croteau L, Mercier C, Fafard-Couture É, Nadeau A, Robillard S, Breton V, Guay A, Lizotte F, Despatis MA, Geraldes P. Endothelial deletion of PKCδ prevents VEGF inhibition and restores blood flow reperfusion in diabetic ischemic limb. Diab Vasc Dis Res 2021; 18:1479164121999033. [PMID: 33722087 PMCID: PMC8481738 DOI: 10.1177/1479164121999033] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
AIMS Peripheral artery disease is a complication of diabetes leading to critical hindlimb ischemia. Diabetes-induced inhibition of VEGF actions is associated with the activation of protein kinase Cδ (PKCδ). We aim to specifically investigate the role of PKCδ in endothelial cell (EC) function and VEGF signaling. METHODS Nondiabetic and diabetic mice, with (ec-Prkcd-/-) or without (ec-Prkcdf/f) endothelial deletion of PKCδ, underwent femoral artery ligation. Blood flow reperfusion was assessed up to 4 weeks post-surgery. Capillary density, EC apoptosis and VEGF signaling were evaluated in the ischemic muscle. Src homology region 2 domain-containing phosphatase-1 (SHP-1) phosphatase activity was assessed in vitro using primary ECs. RESULTS Ischemic muscle of diabetic ec-Prkcdf/f mice exhibited reduced blood flow reperfusion and capillary density while apoptosis increased as compared to nondiabetic ec-Prkcdf/f mice. In contrast, blood flow reperfusion and capillary density were significantly improved in diabetic ec-Prkcd-/- mice. VEGF signaling pathway was restored in diabetic ec-Prkcd-/- mice. The deletion of PKCδ in ECs prevented diabetes-induced VEGF unresponsiveness through a reduction of SHP-1 phosphatase activity. CONCLUSIONS Our data provide new highlights in mechanisms by which PKCδ activation in EC contributed to poor collateral vessel formation, thus, offering novel therapeutic targets to improve angiogenesis in the diabetic limb.
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Affiliation(s)
- Laura Croteau
- Research Center of the Centre Hospitalier Universitaire de Sherbrooke, Sherbrooke, QC, Canada
| | - Clément Mercier
- Research Center of the Centre Hospitalier Universitaire de Sherbrooke, Sherbrooke, QC, Canada
| | - Étienne Fafard-Couture
- Research Center of the Centre Hospitalier Universitaire de Sherbrooke, Sherbrooke, QC, Canada
| | - Alexandre Nadeau
- Research Center of the Centre Hospitalier Universitaire de Sherbrooke, Sherbrooke, QC, Canada
| | - Stéphanie Robillard
- Research Center of the Centre Hospitalier Universitaire de Sherbrooke, Sherbrooke, QC, Canada
| | - Valérie Breton
- Research Center of the Centre Hospitalier Universitaire de Sherbrooke, Sherbrooke, QC, Canada
| | - Andréanne Guay
- Research Center of the Centre Hospitalier Universitaire de Sherbrooke, Sherbrooke, QC, Canada
| | - Farah Lizotte
- Research Center of the Centre Hospitalier Universitaire de Sherbrooke, Sherbrooke, QC, Canada
| | - Marc-Antoine Despatis
- Department of Surgery of the Centre Hospitalier Universitaire de Sherbrooke, Sherbrooke, QC, Canada
| | - Pedro Geraldes
- Research Center of the Centre Hospitalier Universitaire de Sherbrooke, Sherbrooke, QC, Canada
- Department of Medicine, Division of Endocrinology, Université de Sherbrooke, Sherbrooke, QC, Canada
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27
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DiPietro LA, Wilgus TA, Koh TJ. Macrophages in Healing Wounds: Paradoxes and Paradigms. Int J Mol Sci 2021; 22:950. [PMID: 33477945 PMCID: PMC7833402 DOI: 10.3390/ijms22020950] [Citation(s) in RCA: 45] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2020] [Revised: 01/11/2021] [Accepted: 01/14/2021] [Indexed: 12/14/2022] Open
Abstract
Macrophages are prominent cells in normally healing adult skin wounds, yet their exact functions and functional significance to healing outcomes remain enigmatic. Many functional attributes are ascribed to wound macrophages, including host defense and support of the proliferation of new tissue to replace that lost by injury. Indeed, the depletion of macrophages is unmistakably detrimental to normal skin healing in adult mammals. Yet in certain systems, dermal wounds seem to heal well with limited or even no functional macrophages, creating an apparent paradox regarding the function of this cell in wounds. Recent advances in our understanding of wound macrophage phenotypes, along with new information about cellular plasticity in wounds, may provide some explanation for the apparently contradictory findings and suggest new paradigms regarding macrophage function in wounds. Continued study of this remarkable cell is needed to develop effective therapeutic options to improve healing outcomes.
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Affiliation(s)
- Luisa A. DiPietro
- College of Dentistry, University of Illinois at Chicago, 801 S. Paulina, Chicago, IL 60612, USA
| | - Traci A. Wilgus
- Department of Pathology, The Ohio State University, 129 Hamilton Hall, 1645 Neil Ave, Columbus, OH 43210, USA;
| | - Timothy J. Koh
- College of Applied Health Sciences, University of Illinois at Chicago, 1919 W. Taylor, Chicago, IL 60612, USA;
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28
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Abstract
The complex development of the brain vascular system can be broken down by embryonic stages and anatomic locations, which are tightly regulated by different factors and pathways in time and spatially. The adult brain is relatively quiescent in angiogenesis. However, under disease conditions, such as trauma, stroke, or tumor, angiogenesis can be activated in the adult brain. Disruption of any of the factors or pathways may lead to malformed vessel development. In this chapter, we will discuss factors and pathways involved in normal brain vasculogenesis and vascular maturation, and the pathogenesis of several brain vascular malformations.
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Affiliation(s)
- Yao Yao
- Department of Pharmaceutical and Biomedical Sciences, University of Georgia, Athens, GA, United States
| | - Sonali S Shaligram
- Department of Anesthesia and Perioperative Care, Center for Cerebrovascular Research, University of California San Francisco, San Francisco, CA, United States
| | - Hua Su
- Department of Anesthesia and Perioperative Care, Center for Cerebrovascular Research, University of California San Francisco, San Francisco, CA, United States.
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29
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Yin Q, Ma J, Han X, Zhang H, Wang F, Zhuang P, Zhang Y. Spatiotemporal variations of vascular endothelial growth factor in the brain of diabetic cognitive impairment. Pharmacol Res 2020; 163:105234. [PMID: 33053446 DOI: 10.1016/j.phrs.2020.105234] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/28/2020] [Revised: 09/25/2020] [Accepted: 10/04/2020] [Indexed: 12/14/2022]
Abstract
Although it is feared that diabetes-induced cognitive impairment (DCI) will become a major clinical problem worldwide in the future, its detailed pathological mechanism is not well known. Because patients with diabetes have various complications of vascular disease, vascular disorders in the brain are considered to be one of the main mechanisms of DCI. Mounting evidence suggests that the vascular endothelial growth factor (VEGF) family plays a crucial role in the development of DCI. In this review, we summarized the changes and functions of VEGF during the development of DCI, and speculated that it was characterized by spatiotemporal variations in DCI progression. Considering the complexity of DCI pathogenesis and the diversity of VEGF function, we focused on the interrelationship of DCI and VEGF spatiotemporal variations during DCI development. During the progression of DCI, hyperglycemia, abnormal brain insulin signals, advanced glycation end products (AGEs) and consequently hypoxia, oxidative stress, and inflammation are the main pathophysiological changes; hypoxia-inducible factor (HIF), reactive oxygen species (ROS), and nuclear factor kappa beta (NF-κB) play major roles in DCI-related VEGF spatiotemporal regulation. Furthermore, spatiotemporal variations in VEGF-mediated pathological cerebral neovascularization, repair and regeneration of dural lymphatic vessels, increased blood-brain barrier (BBB) permeability and slight neuroprotection are increasing emphasized as potential targets in the treatment of DCI.
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Affiliation(s)
- Qingsheng Yin
- Chinese Materia Medica College, Tianjin University of Traditional Chinese Medicine, Tianjin, 301617, China.
| | - Jing Ma
- Chinese Materia Medica College, Tianjin University of Traditional Chinese Medicine, Tianjin, 301617, China.
| | - Xu Han
- Chinese Materia Medica College, Tianjin University of Traditional Chinese Medicine, Tianjin, 301617, China.
| | - Hanyu Zhang
- Chinese Materia Medica College, Tianjin University of Traditional Chinese Medicine, Tianjin, 301617, China.
| | - Fang Wang
- Chinese Materia Medica College, Tianjin University of Traditional Chinese Medicine, Tianjin, 301617, China.
| | - Pengwei Zhuang
- Chinese Materia Medica College, Tianjin University of Traditional Chinese Medicine, Tianjin, 301617, China; State Key Laboratory of Component-based Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin, 301617, China.
| | - Yanjun Zhang
- State Key Laboratory of Component-based Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin, 301617, China.
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30
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Bhattacharjee S, Lee Y, Zhu B, Wu H, Chen Y, Chen H. Epsins in vascular development, function and disease. Cell Mol Life Sci 2020; 78:833-842. [PMID: 32930806 DOI: 10.1007/s00018-020-03642-4] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2020] [Revised: 08/14/2020] [Accepted: 09/03/2020] [Indexed: 12/15/2022]
Abstract
Epsins are a family of adaptor proteins involved in clathrin-dependent endocytosis. In the vasculature, epsins 1 and 2 are functionally redundant members of this family that are expressed in the endothelial cells of blood vessels and the lymphatic system throughout development and adulthood. These proteins contain a number of peptide motifs that allow them to interact with lipid moieties and a variety of proteins. These interactions facilitate the regulation of a wide range of cell signaling pathways. In this review, we focus on the involvement of epsins 1 and 2 in controlling vascular endothelial growth factor receptor signaling in angiogenesis and lymphangiogenesis. We also discuss the therapeutic implications of understanding the molecular mechanisms of epsin-mediated regulation in diseases such as atherosclerosis and diabetes.
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Affiliation(s)
- Sudarshan Bhattacharjee
- Vascular Biology Program, Harvard Medical School, Boston Children's Hospital and Department of Surgery, Boston, MA, 02115, USA
| | - Yang Lee
- Vascular Biology Program, Harvard Medical School, Boston Children's Hospital and Department of Surgery, Boston, MA, 02115, USA
| | - Bo Zhu
- Vascular Biology Program, Harvard Medical School, Boston Children's Hospital and Department of Surgery, Boston, MA, 02115, USA
| | - Hao Wu
- Vascular Biology Program, Harvard Medical School, Boston Children's Hospital and Department of Surgery, Boston, MA, 02115, USA
| | - Yabing Chen
- Department of Pathology, Birmingham Veterans Affairs Medical Center, University of Alabama at Birmingham and Research Department, Birmingham, AL, 35294, USA
| | - Hong Chen
- Vascular Biology Program, Harvard Medical School, Boston Children's Hospital and Department of Surgery, Boston, MA, 02115, USA.
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Sewell-Loftin MK, Katz JB, George SC, Longmore GD. Micro-strains in the extracellular matrix induce angiogenesis. LAB ON A CHIP 2020; 20:2776-2787. [PMID: 32614340 PMCID: PMC7659465 DOI: 10.1039/d0lc00145g] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
An improved understanding of biomechanical factors that control tumor development, including angiogenesis, could explain why few of the promising treatment strategies discovered via in vitro models translate well into in vivo or clinical studies. The ability to manipulate and in real-time study the multiple independent biomechanical properties on cellular activity has been limited, primarily due to limitations in traditional in vitro platforms or the inability to manipulate such factors in vivo. We present a novel microfluidic platform that mimics the vascularized tumor microenvironment with independent control of interstitial flow and mechanical strain. The microtissue platform design isolates mechanically-stimulated angiogenesis in the tumor microenvironment, by manipulating interstitial flow to eliminate soluble factors that could drive blood vessel growth. Our studies demonstrate that enhanced mechanical strain induced by cancer-associated fibroblasts (CAFs) promotes angiogenesis in microvasculature models, even when preventing diffusion of soluble factors to the growing vasculature. Moreover, small but significant decreases in micro-strains induced by inhibited CAFs were sufficient to reduce angiogenesis. Ultimately, we believe this platform represents a significant advancement in the ability to investigate biomechanical signals while controlling for biochemical signals, with a potential to be utilized in fields beyond cancer research.
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Affiliation(s)
- Mary Kathryn Sewell-Loftin
- Department of Biomedical Engineering, Wallace Tumor Institute, University of Alabama at Birmingham, 1824 6th Avenue South, Room 630A, Birmingham, AL 35294, USA.
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32
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Cross-Talk between NADPH Oxidase and Mitochondria: Role in ROS Signaling and Angiogenesis. Cells 2020; 9:cells9081849. [PMID: 32781794 PMCID: PMC7466096 DOI: 10.3390/cells9081849] [Citation(s) in RCA: 168] [Impact Index Per Article: 42.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2020] [Revised: 07/27/2020] [Accepted: 08/05/2020] [Indexed: 02/07/2023] Open
Abstract
Angiogenesis, a new vessel formation from the pre-existing ones, is essential for embryonic development, wound repair and treatment of ischemic heart and limb diseases. However, dysregulated angiogenesis contributes to various pathologies such as diabetic retinopathy, atherosclerosis and cancer. Reactive oxygen species (ROS) derived from NADPH oxidase (NOX) as well as mitochondria play an important role in promoting the angiogenic switch from quiescent endothelial cells (ECs). However, how highly diffusible ROS produced from different sources and location can communicate with each other to regulate angiogenesis remains unclear. To detect a localized ROS signal in distinct subcellular compartments in real time in situ, compartment-specific genetically encoded redox-sensitive fluorescence biosensors have been developed. Recently, the intercellular communication, “cross-talk”, between ROS derived from NOX and mitochondria, termed “ROS-induced ROS release”, has been proposed as a mechanism for ROS amplification at distinct subcellular compartments, which are essential for activation of redox signaling. This “ROS-induced ROS release” may represent a feed-forward mechanism of localized ROS production to maintain sustained signaling, which can be targeted under pathological conditions with oxidative stress or enhanced to promote therapeutic angiogenesis. In this review, we summarize the recent knowledge regarding the role of the cross-talk between NOX and mitochondria organizing the sustained ROS signaling involved in VEGF signaling, neovascularization and tissue repair.
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33
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Shetty T, Sishtla K, Park B, Repass MJ, Corson TW. Heme Synthesis Inhibition Blocks Angiogenesis via Mitochondrial Dysfunction. iScience 2020; 23:101391. [PMID: 32755804 PMCID: PMC7399258 DOI: 10.1016/j.isci.2020.101391] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2019] [Revised: 04/10/2020] [Accepted: 07/17/2020] [Indexed: 01/01/2023] Open
Abstract
The relationship between heme metabolism and angiogenesis is poorly understood. The final synthesis of heme occurs in mitochondria, where ferrochelatase (FECH) inserts Fe2+ into protoporphyrin IX to produce proto-heme IX. We previously showed that FECH inhibition is antiangiogenic in human retinal microvascular endothelial cells (HRECs) and in animal models of ocular neovascularization. In the present study, we sought to understand the mechanism of how FECH and thus heme is involved in endothelial cell function. Mitochondria in endothelial cells had several defects in function after heme inhibition. FECH loss changed the shape and mass of mitochondria and led to significant oxidative stress. Oxidative phosphorylation and mitochondrial Complex IV were decreased in HRECs and in murine retina ex vivo after heme depletion. Supplementation with heme partially rescued phenotypes of FECH blockade. These findings provide an unexpected link between mitochondrial heme metabolism and angiogenesis. Heme synthesis inhibition changes mitochondrial morphology in endothelial cells Loss of heme causes buildup of mitochondrial ROS and depolarized membrane potential Endothelial cells have damaged oxidative phosphorylation and glycolysis on heme loss Damage is due to loss of heme-containing Complex IV, restored by exogenous heme
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Affiliation(s)
- Trupti Shetty
- Eugene and Marilyn Glick Eye Institute, Department of Ophthalmology, Indiana University School of Medicine, Indianapolis, IN 46202, USA; Department of Pharmacology & Toxicology, Indiana University School of Medicine, Indianapolis, IN 46202, USA
| | - Kamakshi Sishtla
- Eugene and Marilyn Glick Eye Institute, Department of Ophthalmology, Indiana University School of Medicine, Indianapolis, IN 46202, USA
| | - Bomina Park
- Eugene and Marilyn Glick Eye Institute, Department of Ophthalmology, Indiana University School of Medicine, Indianapolis, IN 46202, USA; Department of Pharmacology & Toxicology, Indiana University School of Medicine, Indianapolis, IN 46202, USA
| | - Matthew J Repass
- Angio BioCore, Indiana University School of Medicine, Indianapolis, IN 46202, USA; Melvin and Bren Simon Cancer Center, Indiana University School of Medicine, Indianapolis, IN 46202, USA
| | - Timothy W Corson
- Eugene and Marilyn Glick Eye Institute, Department of Ophthalmology, Indiana University School of Medicine, Indianapolis, IN 46202, USA; Department of Pharmacology & Toxicology, Indiana University School of Medicine, Indianapolis, IN 46202, USA; Department of Biochemistry and Molecular Biology, Indiana University School of Medicine, Indianapolis, IN 46202, USA; Melvin and Bren Simon Cancer Center, Indiana University School of Medicine, Indianapolis, IN 46202, USA.
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34
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Oxidative Stress and New Pathogenetic Mechanisms in Endothelial Dysfunction: Potential Diagnostic Biomarkers and Therapeutic Targets. J Clin Med 2020; 9:jcm9061995. [PMID: 32630452 PMCID: PMC7355625 DOI: 10.3390/jcm9061995] [Citation(s) in RCA: 83] [Impact Index Per Article: 20.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2020] [Revised: 06/15/2020] [Accepted: 06/23/2020] [Indexed: 02/07/2023] Open
Abstract
Cardiovascular diseases (CVD), including heart and pathological circulatory conditions, are the world's leading cause of mortality and morbidity. Endothelial dysfunction involved in CVD pathogenesis is a trigger, or consequence, of oxidative stress and inflammation. Endothelial dysfunction is defined as a diminished production/availability of nitric oxide, with or without an imbalance between endothelium-derived contracting, and relaxing factors associated with a pro-inflammatory and prothrombotic status. Endothelial dysfunction-induced phenotypic changes include up-regulated expression of adhesion molecules and increased chemokine secretion, leukocyte adherence, cell permeability, low-density lipoprotein oxidation, platelet activation, and vascular smooth muscle cell proliferation and migration. Inflammation-induced oxidative stress results in an increased accumulation of reactive oxygen species (ROS), mainly derived from mitochondria. Excessive ROS production causes oxidation of macromolecules inducing cell apoptosis mediated by cytochrome-c release. Oxidation of mitochondrial cardiolipin loosens cytochrome-c binding, thus, favoring its cytosolic release and activation of the apoptotic cascade. Oxidative stress increases vascular permeability, promotes leukocyte adhesion, and induces alterations in endothelial signal transduction and redox-regulated transcription factors. Identification of new endothelial dysfunction-related oxidative stress markers represents a research goal for better prevention and therapy of CVD. New-generation therapeutic approaches based on carriers, gene therapy, cardiolipin stabilizer, and enzyme inhibitors have proved useful in clinical practice to counteract endothelial dysfunction. Experimental studies are in continuous development to discover new personalized treatments. Gene regulatory mechanisms, implicated in endothelial dysfunction, represent potential new targets for developing drugs able to prevent and counteract CVD-related endothelial dysfunction. Nevertheless, many challenges remain to overcome before these technologies and personalized therapeutic strategies can be used in CVD management.
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35
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Rieger L, O'Shea S, Godsmark G, Stanicka J, Kelly G, O'Connor R. IGF-1 receptor activity in the Golgi of migratory cancer cells depends on adhesion-dependent phosphorylation of Tyr 1250 and Tyr 1251. Sci Signal 2020; 13:13/633/eaba3176. [PMID: 32457113 DOI: 10.1126/scisignal.aba3176] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Although insulin-like growth factor 1 (IGF-1) signaling promotes tumor growth and cancer progression, therapies that target the IGF-1 receptor (IGF-1R) have shown poor clinical efficacy. To address IGF-1R activity in cancer cells and how it differs from that of the closely related insulin receptor (IR), we focused on two tyrosines in the IGF-1R C-terminal tail that are not present in the IR and are essential for IGF-1-mediated cancer cell survival, migration, and tumorigenic growth. We found that Tyr1250 and Tyr1251 (Tyr1250/1251) were autophosphorylated in a cell adhesion-dependent manner. To investigate the consequences of this phosphorylation, we generated phosphomimetic Y1250E/Y1251E (EE) and nonphosphorylatable Y1250F/Y1251F (FF) mutant forms of IGF-1R. Although fully competent in kinase activity and signaling, the EE mutant was more rapidly internalized and degraded than either the wild-type or FF receptor. IGF-1 promoted the accumulation of wild-type and EE IGF-1R within the Golgi apparatus, whereas the FF mutant remained at the plasma membrane. Golgi-associated IGF-1R signaling was a feature of migratory cancer cells, and Golgi disruption impaired IGF-1-induced signaling and cell migration. Upon the formation of new cell adhesions, IGF-1R transiently relocalized to the plasma membrane from the Golgi. Thus, phosphorylation at Tyr1250/1251 promoted IGF-1R translocation to and signaling from the Golgi to support an aggressive cancer phenotype. This process distinguishes IGF-1R from IR signaling and could contribute to the poor clinical efficacy of antibodies that target IGF-1R on the cell surface.
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Affiliation(s)
- Leonie Rieger
- Cell Biology Laboratory, School of Biochemistry and Cell Biology, BioSciences Institute, University College Cork, Cork, Ireland
| | - Sandra O'Shea
- Cell Biology Laboratory, School of Biochemistry and Cell Biology, BioSciences Institute, University College Cork, Cork, Ireland
| | - Grant Godsmark
- Cell Biology Laboratory, School of Biochemistry and Cell Biology, BioSciences Institute, University College Cork, Cork, Ireland
| | - Joanna Stanicka
- Cell Biology Laboratory, School of Biochemistry and Cell Biology, BioSciences Institute, University College Cork, Cork, Ireland
| | - Geraldine Kelly
- Cell Biology Laboratory, School of Biochemistry and Cell Biology, BioSciences Institute, University College Cork, Cork, Ireland
| | - Rosemary O'Connor
- Cell Biology Laboratory, School of Biochemistry and Cell Biology, BioSciences Institute, University College Cork, Cork, Ireland.
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Xu J, Liu X, Zhao F, Zhang Y, Wang Z. HIF1α overexpression enhances diabetic wound closure in high glucose and low oxygen conditions by promoting adipose-derived stem cell paracrine function and survival. Stem Cell Res Ther 2020; 11:148. [PMID: 32248837 PMCID: PMC7132964 DOI: 10.1186/s13287-020-01654-2] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2019] [Revised: 03/11/2020] [Accepted: 03/17/2020] [Indexed: 12/31/2022] Open
Abstract
Background Adipose-derived stem cell (ADSC) transplantation is a promising strategy to promote wound healing because of the paracrine function of stem cells. However, glucose-associated effects on stem cell paracrine function and survival contribute to impaired wound closure in patients with diabetes, limiting the efficacy of ADSC transplantation. Hypoxia-inducible factor (HIF)1α plays important roles in wound healing, and in this study, we investigated the effects of HIF1α overexpression on ADSCs in high glucose and low oxygen conditions. Methods Adipose samples were obtained from BALB/C mice, and ADSCs were cultured in vitro by digestion. Control and HIF1α-overexpressing ADSCs were induced by transduction. The mRNA and protein levels of angiogenic growth factors in control and HIF1α-overexpressing ADSCs under high glucose and low oxygen conditions were analyzed by quantitative reverse transcription-polymerase chain reaction and western blotting. The effects of ADSC HIF1α overexpression on the proliferation and migration of mouse aortic endothelial cells (MAECs) under high glucose were evaluated using an in vitro coculture model. Intracellular reactive oxygen species (ROS) and 8-hydroxydeoxyguanosine (8-OHdG) levels in ADSCs were observed using 2,7-dichlorodihydrofluorescein diacetate staining and enzyme-linked immunosorbent assays, respectively. Apoptosis and cell cycle analysis assays were performed by flow cytometry. An in vivo full-thickness skin defect mouse model was used to evaluate the effects of transplanted ADSCs on diabetic wound closure. Results In vitro, HIF1α overexpression in ADSCs significantly increased the expression of vascular endothelial growth factor A, fibroblast growth factor 2, and C-X-C motif chemokine ligand 12, which were inhibited by high glucose. HIF1α overexpression in ADSCs alleviated high glucose-induced defects in MAEC proliferation and migration and significantly suppressed ADSC ROS and 8-OHdG levels, thereby decreasing apoptosis and enhancing survival. In vivo, HIF1α overexpression in ADSCs prior to transplantation significantly enhanced angiogenic growth factor expression, promoting wound closure in diabetic mice. Conclusions HIF1α overexpression in ADSCs efficiently alleviates high glucose-induced paracrine dysfunction, decreases oxidative stress and subsequent DNA damage, improves viability, and enhances the therapeutic effects of ADSCs on diabetic wound healing.
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Affiliation(s)
- Jin Xu
- Department of Surgery, Shengjing Hospital of China Medical University, No. 36 Sanhao Street, Heping District, Shenyang, 110004, China
| | - Xiaoyu Liu
- Department of Obstetrics and Gynecology, Reproductive Medicine Center, Shengjing Hospital of China Medical University, No. 36 Sanhao Street, Heping District, Shenyang, 110004, China
| | - Feng Zhao
- Department of Stem Cells and Regenerative Medicine, Shenyang Key Laboratory for Stem Cells and Regenerative Medicine, Key Laboratory of Cell Biology, Ministry of Public Health, and Key Laboratory of Medical Cell Biology, Ministry of Education, China Medical University, No. 77 Puhe Street, Shenbei New District, Shenyang, 110122, China
| | - Ying Zhang
- Department of Pathology, Shengjing Hospital of China Medical University, No. 36 Sanhao Street, Heping District, Shenyang, 110004, China
| | - Zhe Wang
- Department of Pathology, Shengjing Hospital of China Medical University, No. 36 Sanhao Street, Heping District, Shenyang, 110004, China.
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Yang S, Xu M, Meng G, Lu Y. SIRT3 deficiency delays diabetic skin wound healing via oxidative stress and necroptosis enhancement. J Cell Mol Med 2020; 24:4415-4427. [PMID: 32119761 PMCID: PMC7176871 DOI: 10.1111/jcmm.15100] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2019] [Revised: 02/02/2020] [Accepted: 02/12/2020] [Indexed: 02/06/2023] Open
Abstract
Sirtuin 3 (SIRT3) plays a vital role in several dermatological diseases. However, the role and detailed mechanism of SIRT3 in diabetic wound healing are unknown well yet. To explore possible involvement of SIRT3 and necroptosis in diabetic skin wound healing, SIRT3 knockout (KO) mice and 129S1/SvImJ wild‐type (WT) mice were injected with streptozotocin (STZ), and mice skin fibroblasts were exposed to high glucose (HG). It was found that SIRT3 expression decreased in the skin of diabetic patients. SIRT3 deficiency delayed healing rate, reduced blood supply and vascular endothelial growth factor expression, promoted superoxide production, increased malondialdehyde (MDA) levels, decreased total antioxidant capacity (T‐AOC), reduced superoxide dismutase (SOD) activity and aggravated ultrastructure disorder in skin wound of diabetic mice. SIRT3 deficiency inhibited mice skin fibroblasts migration with HG stimulation, which was restored by SIRT3 overexpression. SIRT3 deficiency also suppressed α‐smooth muscle actin (α‐SMA) expression, enhanced superoxide production but decreased mitochondrial membrane potential with HG stimulation after scratch. SIRT3 deficiency further elevated receptor‐interacting protein kinase 3 (RIPK3), RIPK1 and caspase 3 expression both in vitro and in vivo. Collectively, SIRT3 deficiency delayed skin wound healing in diabetes, the mechanism might be related to impaired mitochondria function, enhanced oxidative stress and increased necroptosis. This may provide a novel therapeutic target to accelerate diabetic skin wound healing.
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Affiliation(s)
- Shengju Yang
- Department of Dermatology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China.,Department of Dermatology, Affiliated Hospital of Nantong University, Nantong, China
| | - Mengting Xu
- Department of Pharmacology, School of Pharmacy, Nantong University, Nantong, China
| | - Guoliang Meng
- Department of Pharmacology, School of Pharmacy, Nantong University, Nantong, China
| | - Yan Lu
- Department of Dermatology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
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Targeting endothelial thioredoxin-interacting protein (TXNIP) protects from metabolic disorder-related impairment of vascular function and post-ischemic revascularisation. Angiogenesis 2020; 23:249-264. [PMID: 31900750 DOI: 10.1007/s10456-019-09704-x] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2019] [Accepted: 12/14/2019] [Indexed: 12/12/2022]
Abstract
INTRODUCTION Although thioredoxin-interacting protein (TXNIP) is involved in a variety of biological functions, the contribution of endothelial TXNIP has not been well-defined in regards to endothelial and vascular function or in post-ischemic revascularisation. We postulated that inhibition of endothelial TXNIP with siRNA or in a Cre-LoxP system could be involved in protection from high fat, high protein, low carbohydrate (HFHPLC) diet-induced oxidative stress and endothelial dysfunction, leading to vascular damage and impaired revascularisation in vivo. METHODS AND RESULTS To investigate the role of endothelial TXNIP, the TXNIP gene was deleted in endothelial cells using anti-TXNIP siRNA treatment or the Cre-LoxP system. Murine models were fed a HFHPLC diet, known to induce metabolic disorders. Endothelial TXNIP targeting resulted in protection against metabolic disorder-related endothelial oxidative stress and endothelial dysfunction. This protective effect mitigates media cell loss induced by metabolic disorders and hampered metabolic disorder-related vascular dysfunction assessed by aortic reactivity and distensibility. In aortic ring cultures, metabolic disorders impaired vessel sprouting and this alteration was alleviated by deletion of endothelial TXNIP. When subjected to ischemia, mice fed a HFHPLC diet exhibited defective post-ischemic angiogenesis and impaired blood flow recovery in hind limb ischemia. However, reducing endothelial TXNIP rescued metabolic disorder-related impairment of ischemia-induced revascularisation. CONCLUSION Collectively, these results show that targeting endothelial TXNIP in metabolic disorders is essential to maintaining endothelial function, vascular function and improving ischemia-induced revascularisation, making TXNIP a potential therapeutic target for therapy of vascular complications related to metabolic disorders.
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Rieger L, O’Connor R. Controlled Signaling-Insulin-Like Growth Factor Receptor Endocytosis and Presence at Intracellular Compartments. Front Endocrinol (Lausanne) 2020; 11:620013. [PMID: 33584548 PMCID: PMC7878670 DOI: 10.3389/fendo.2020.620013] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/21/2020] [Accepted: 12/02/2020] [Indexed: 12/16/2022] Open
Abstract
Ligand-induced activation of the IGF-1 receptor triggers plasma-membrane-derived signal transduction but also triggers receptor endocytosis, which was previously thought to limit signaling. However, it is becoming ever more clear that IGF-1R endocytosis and trafficking to specific subcellular locations can define specific signaling responses that are important for key biological processes in normal cells and cancer cells. In different cell types, specific cell adhesion receptors and associated proteins can regulate IGF-1R endocytosis and trafficking. Once internalized, the IGF-1R may be recycled, degraded or translocated to the intracellular membrane compartments of the Golgi apparatus or the nucleus. The IGF-1R is present in the Golgi apparatus of migratory cancer cells where its signaling contributes to aggressive cancer behaviors including cell migration. The IGF-1R is also found in the nucleus of certain cancer cells where it can regulate gene expression. Nuclear IGF-1R is associated with poor clinical outcomes. IGF-1R signaling has also been shown to support mitochondrial biogenesis and function, and IGF-1R inhibition causes mitochondrial dysfunction. How IGF-1R intracellular trafficking and compartmentalized signaling is controlled is still unknown. This is an important area for further study, particularly in cancer.
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Hemling P, Zibrova D, Strutz J, Sohrabi Y, Desoye G, Schulten H, Findeisen H, Heller R, Godfrey R, Waltenberger J. Hyperglycemia-induced endothelial dysfunction is alleviated by thioredoxin mimetic peptides through the restoration of VEGFR-2-induced responses and improved cell survival. Int J Cardiol 2019; 308:73-81. [PMID: 31955977 DOI: 10.1016/j.ijcard.2019.12.065] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/09/2019] [Revised: 12/05/2019] [Accepted: 12/29/2019] [Indexed: 01/16/2023]
Abstract
BACKGROUND Diabetes mellitus is an important cardiovascular risk factor characterized by elevated plasma glucose levels. High glucose (HG) negatively influences endothelial cell (EC) function, which is characterized by the inability of ECs to respond to vascular endothelial growth factor (VEGF-A) stimulation. We aimed to identify potential strategies to improve EC function in diabetes. METHODS AND RESULTS Human umbilical cord endothelial cells (HUVECs) were subjected to hyperglycemic milieu by exposing cells to HG together with glucose metabolite, methylglyoxal (MG) in vitro. Hyperglycemic cells showed reduced chemotactic responses towards VEGF-A as revealed by Boyden chamber migration assays, indicating the development of "VEGF resistance" phenotype. Furthermore, HG/MG-exposed cells were defective in their general migratory and proliferative responses and were in a pro-apoptotic state. Mechanistically, the exposure to HG/MG resulted in reactive oxygen species (ROS) accumulation which is secondary to the impairment of thioredoxin (Trx) activity in these cells. Pharmacological and genetic targeting of Trx recapitulated VEGF resistance. Functional supplementation of Trx using thioredoxin mimetic peptides (TMP) reversed the HG/MG-induced ROS generation, improved the migration, proliferation, survival and restored VEGF-A-induced chemotaxis and sprouting angiogenesis of hyperglycemic ECs. Importantly, TMP treatment reduced ROS accumulation and improved VEGF-A responses of placental arterial endothelial cells isolated from gestational diabetes mellitus patients. CONCLUSIONS Our findings suggest a putative role for Trx in modulating EC function and its functional impairment in HG conditions contribute to EC dysfunction. Supplementation of TMP could be used as a novel strategy to improve endothelial cell function in diabetes.
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Affiliation(s)
- Pia Hemling
- Experimental and Molecular Cardiology, Department of Cardiovascular Medicine, University Hospital Münster, Münster, Germany; Molecular Cardiology, Department of Cardiology I - Coronary and Peripheral Vascular Disease, Heart Failure, University Hospital Münster, Münster, Germany; Cells-in-Motion Cluster of Excellence (EXC 1003-CiM), University of Münster, Münster, Germany
| | - Darya Zibrova
- Institute for Molecular Cell Biology, Center for Molecular Biomedicine, University Hospital Jena, Jena, Germany
| | - Jasmin Strutz
- Department of Obstetrics and Gynecology, Medical University of Graz, Austria
| | - Yahya Sohrabi
- Molecular Cardiology, Department of Cardiology I - Coronary and Peripheral Vascular Disease, Heart Failure, University Hospital Münster, Münster, Germany
| | - Gernot Desoye
- Department of Obstetrics and Gynecology, Medical University of Graz, Austria
| | - Henny Schulten
- Experimental and Molecular Cardiology, Department of Cardiovascular Medicine, University Hospital Münster, Münster, Germany; Department of Physiology, Cardiovascular Research Institute Maastricht (CARIM), Maastricht, the Netherlands
| | - Hannes Findeisen
- Molecular Cardiology, Department of Cardiology I - Coronary and Peripheral Vascular Disease, Heart Failure, University Hospital Münster, Münster, Germany
| | - Regine Heller
- Institute for Molecular Cell Biology, Center for Molecular Biomedicine, University Hospital Jena, Jena, Germany
| | - Rinesh Godfrey
- Experimental and Molecular Cardiology, Department of Cardiovascular Medicine, University Hospital Münster, Münster, Germany; Molecular Cardiology, Department of Cardiology I - Coronary and Peripheral Vascular Disease, Heart Failure, University Hospital Münster, Münster, Germany; Department of Physiology, Cardiovascular Research Institute Maastricht (CARIM), Maastricht, the Netherlands; Cells-in-Motion Cluster of Excellence (EXC 1003-CiM), University of Münster, Münster, Germany.
| | - Johannes Waltenberger
- Experimental and Molecular Cardiology, Department of Cardiovascular Medicine, University Hospital Münster, Münster, Germany; Department of Physiology, Cardiovascular Research Institute Maastricht (CARIM), Maastricht, the Netherlands; Cells-in-Motion Cluster of Excellence (EXC 1003-CiM), University of Münster, Münster, Germany; Department of Internal Medicine I, SRH Central Hospial, Suhl, Germany.
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DiStefano PV, Glading AJ. VEGF signalling enhances lesion burden in KRIT1 deficient mice. J Cell Mol Med 2019; 24:632-639. [PMID: 31746130 PMCID: PMC6933401 DOI: 10.1111/jcmm.14773] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2019] [Revised: 09/09/2019] [Accepted: 10/03/2019] [Indexed: 12/22/2022] Open
Abstract
The exact molecular mechanisms underlying CCM pathogenesis remain a complicated and controversial topic. Our previous work illustrated an important VEGF signalling loop in KRIT1 depleted endothelial cells. As VEGF is a major mediator of many vascular pathologies, we asked whether the increased VEGF signalling downstream of KRIT1 depletion was involved in CCM formation. Using an inducible KRIT1 endothelial‐specific knockout mouse that models CCM, we show that VEGFR2 activation plays a role in CCM pathogenesis in mice. Inhibition of VEGFR2 using a specific inhibitor, SU5416, significantly decreased the number of lesions formed and slightly lowered the average lesion size. Notably, VEGFR2 inhibition also decreased the appearance of lesion haemorrhage as denoted by the presence of free iron in adjacent tissues. The presence of free iron correlated with increased microvessel permeability in both skeletal muscle and brain, which was completely reversed by SU5416 treatment. Finally, we show that VEGFR2 activation is a common downstream consequence of KRIT1, CCM2 and CCM3 loss of function, though the mechanism by which VEGFR2 activation occurs likely varies. Thus, our study clearly shows that VEGFR2 activation downstream of KRIT1 depletion enhances the severity of CCM formation in mice, and suggests that targeting VEGF signalling may be a potential future therapy for CCM.
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Affiliation(s)
- Peter V DiStefano
- Department of Pharmacology and Physiology, University of Rochester, Rochester, New York
| | - Angela J Glading
- Department of Pharmacology and Physiology, University of Rochester, Rochester, New York
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VEGFR2 activation mediates the pro-angiogenic activity of BMP4. Angiogenesis 2019; 22:521-533. [PMID: 31363885 DOI: 10.1007/s10456-019-09676-y] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2018] [Accepted: 07/22/2019] [Indexed: 12/19/2022]
Abstract
The Bone Morphogenetic Protein 4 (BMP4) regulates multiple biological processes, including vascular development and angiogenesis. Here, we investigated the role of Vascular Endothelial Growth Factor Receptor 2 (VEGFR2) in mediating the angiogenic activity of BMP4. BMP4 induces a rapid relocation and phosphorylation of VEGFR2 on the endothelial cell membrane. These effects occur in the absence of a direct interaction of BMP4 and/or BMP receptors with VEGFR2. At variance, BMP4, by interacting with the BMPRI-II hetero-complex, induces c-Src phosphorylation which, in turn, activates VEGFR2, leading to an angiogenic response. Accordingly, the BMPR inhibitor dorsomorphin prevents c-Src activation and specific inhibition of c-Src significantly reduces downstream VEGFR2 phosphorylation and the angiogenic activity exerted by BMP4 in a chick embryo chorioallantoic membrane assay. Together, our data indicate that the pro-angiogenic activity exerted by BMP4 in endothelial cells is mediated by a BMPR-mediated intracellular transactivation of VEGFR2 via c-Src.
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Akla N, Viallard C, Popovic N, Lora Gil C, Sapieha P, Larrivée B. BMP9 (Bone Morphogenetic Protein-9)/Alk1 (Activin-Like Kinase Receptor Type I) Signaling Prevents Hyperglycemia-Induced Vascular Permeability. Arterioscler Thromb Vasc Biol 2019; 38:1821-1836. [PMID: 29880487 DOI: 10.1161/atvbaha.118.310733] [Citation(s) in RCA: 45] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Objective- Diabetic macular edema is a major cause of visual impairment. It is caused by blood-retinal barrier breakdown that leads to vascular hyperpermeability. Current therapeutic approaches consist of retinal photocoagulation or targeting VEGF (vascular endothelial growth factor) to limit vascular leakage. However, long-term intravitreal use of anti-VEGFs is associated with potential safety issues, and the identification of alternative regulators of vascular permeability may provide safer therapeutic options. The vascular specific BMP (bone morphogenetic protein) receptor ALK1 (activin-like kinase receptor type I) and its circulating ligand BMP9 have been shown to be potent vascular quiescence factors, but their role in the context of microvascular permeability associated with hyperglycemia has not been evaluated. Approach and Results- We investigated Alk1 signaling in hyperglycemic endothelial cells and assessed whether BMP9/Alk1 signaling could modulate vascular permeability. We show that high glucose concentrations impair Alk1 signaling, both in cultured endothelial cells and in a streptozotocin model of mouse diabetes mellitus. We observed that Alk1 signaling participates in the maintenance of vascular barrier function, as Alk1 haploinsufficiency worsens the vascular leakage observed in diabetic mice. Conversely, sustained delivery of BMP9 by adenoviral vectors significantly decreased the loss of retinal barrier function in diabetic mice. Mechanistically, we demonstrate that Alk1 signaling prevents VEGF-induced phosphorylation of VE-cadherin and induces the expression of occludin, thus strengthening vascular barrier functions. Conclusions- From these data, we suggest that by preventing retinal vascular permeability, BMP9 could serve as a novel therapeutic agent for diabetic macular edema.
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Affiliation(s)
- Naoufal Akla
- From the Department of Biochemistry (N.A., P.S.).,University of Montreal, Quebec, Canada; and Maisonneuve-Rosemont Hospital Research Center, Montreal, Quebec, Canada (N.A., C.V., N.P., C.L.G., P.S., B.L.)
| | - Claire Viallard
- Department of Molecular Biology (C.V., B.L.).,University of Montreal, Quebec, Canada; and Maisonneuve-Rosemont Hospital Research Center, Montreal, Quebec, Canada (N.A., C.V., N.P., C.L.G., P.S., B.L.)
| | - Natalija Popovic
- Department of Biomedical Sciences (N.P., C.L.G., B.L.).,University of Montreal, Quebec, Canada; and Maisonneuve-Rosemont Hospital Research Center, Montreal, Quebec, Canada (N.A., C.V., N.P., C.L.G., P.S., B.L.)
| | - Cindy Lora Gil
- Department of Biomedical Sciences (N.P., C.L.G., B.L.).,University of Montreal, Quebec, Canada; and Maisonneuve-Rosemont Hospital Research Center, Montreal, Quebec, Canada (N.A., C.V., N.P., C.L.G., P.S., B.L.)
| | - Przemyslaw Sapieha
- From the Department of Biochemistry (N.A., P.S.).,Department of Ophthalmology (P.S., B.L.).,University of Montreal, Quebec, Canada; and Maisonneuve-Rosemont Hospital Research Center, Montreal, Quebec, Canada (N.A., C.V., N.P., C.L.G., P.S., B.L.)
| | - Bruno Larrivée
- Department of Molecular Biology (C.V., B.L.).,Department of Biomedical Sciences (N.P., C.L.G., B.L.).,Department of Ophthalmology (P.S., B.L.).,University of Montreal, Quebec, Canada; and Maisonneuve-Rosemont Hospital Research Center, Montreal, Quebec, Canada (N.A., C.V., N.P., C.L.G., P.S., B.L.)
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Abstract
PURPOSE OF REVIEW Microvascular ischemic disease of the brain is a common cause of cognitive impairment and dementia, particularly in the context of preexisting cardiovascular risk factors and aging. This review summarizes our current understanding of the emerging molecular themes that underlie progressive and irreparable vascular disease leading to neuronal tissue injury and dementia. RECENT FINDINGS Cardiometabolic risk factors including diabetes and hypertension are known to contribute to vascular disease. Currently, the impact of these risk factors on the integrity and function of the brain vasculature has been target of intense investigation. Molecularly, the consequences associated with these risk factors indicate that reactive oxygen species are strong contributors to cerebrovascular dysfunction and injury. In addition, genetic linkage analyses have identified penetrant monogenic causes of vascular dementia. Finally, recent reports begun to uncover a large number of polymorphisms associated with a higher risk for cerebrovascular disease. SUMMARY A comprehensive picture of key risk factors and genetic predispositions that contribute to brain microvascular disease and result in vascular dementia is starting to emerge. Understanding their relationships and cross-interactions will significantly aid in the development of preventive and intervention strategies for this devastating condition.
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Affiliation(s)
- Milagros C. Romay
- Department of Molecular, Cell and Developmental Biology, University of California, Los Angeles 90095
| | - Camilo Toro
- Undiagnosed Diseases Program, National Institutes of Health, Bethesda, MD 20892
| | - M. Luisa Iruela-Arispe
- Department of Molecular, Cell and Developmental Biology, University of California, Los Angeles 90095
- Molecular Biology Institute, University of California, Los Angeles 90095
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Yuan J, Tan JTM, Rajamani K, Solly EL, King EJ, Lecce L, Simpson PJL, Lam YT, Jenkins AJ, Bursill CA, Keech AC, Ng MKC. Fenofibrate Rescues Diabetes-Related Impairment of Ischemia-Mediated Angiogenesis by PPARα-Independent Modulation of Thioredoxin-Interacting Protein. Diabetes 2019; 68:1040-1053. [PMID: 30765336 DOI: 10.2337/db17-0926] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/06/2017] [Accepted: 02/07/2019] [Indexed: 12/18/2022]
Abstract
Fenofibrate, a peroxisome proliferator-activated receptor α (PPARα) agonist, reduces lower limb amputations in patients with type 2 diabetes. The mechanism is, however, unknown. In this study, we demonstrate that fenofibrate markedly attenuates diabetes-related impairment of ischemia-mediated angiogenesis. In a murine model of hindlimb ischemia, daily oral fenofibrate treatment restored diabetes-impaired blood flow recovery, foot movement, hindlimb capillary density, vessel diameter, and vascular endothelial growth factor signaling to nondiabetic levels in both wild-type and PPARα-knockout mice, indicating that these fenofibrate effects are largely PPARα independent. In vitro, fenofibric acid (FFA) rescued high glucose-induced (25 mmol/L) impairment of endothelial cell migration, tubulogenesis, and survival in a PPARα-independent manner. Interestingly, fenofibrate in vivo and FFA in vitro reversed high glucose-induced expression of thioredoxin-interacting protein (TXNIP), an exquisitely glucose-inducible gene previously identified as a critical mediator of diabetes-related impairment in neovascularization. Conversely, adenoviral overexpression of TXNIP abrogated the restorative effects of FFA on high glucose-impaired endothelial cell function in vitro, indicating that the effects of FFA are mediated by TXNIP. We conclude that fenofibrate rescues diabetic impairment in ischemia-mediated angiogenesis, in large part, by PPARα-independent regulation of TXNIP. These findings may therefore explain the reduction in amputations seen in patients with diabetes treated with fenofibrate.
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Affiliation(s)
- Jun Yuan
- Heart Research Institute, Newtown, New South Wales, Australia
- Sydney Medical School, The University of Sydney, Sydney, New South Wales, Australia
| | - Joanne T M Tan
- Heart Research Institute, Newtown, New South Wales, Australia
- Sydney Medical School, The University of Sydney, Sydney, New South Wales, Australia
- South Australian Health and Medical Research Institute, Adelaide, South Australia, Australia
- Faculty of Health and Medical Sciences, Adelaide Medical School, The University of Adelaide, Adelaide, South Australia, Australia
| | - Kushwin Rajamani
- Heart Research Institute, Newtown, New South Wales, Australia
- Sydney Medical School, The University of Sydney, Sydney, New South Wales, Australia
- NHMRC Clinical Trials Centre, Camperdown, New South Wales, Australia
| | - Emma L Solly
- South Australian Health and Medical Research Institute, Adelaide, South Australia, Australia
| | - Emily J King
- Heart Research Institute, Newtown, New South Wales, Australia
| | - Laura Lecce
- Heart Research Institute, Newtown, New South Wales, Australia
| | | | - Yuen Ting Lam
- Heart Research Institute, Newtown, New South Wales, Australia
- Sydney Medical School, The University of Sydney, Sydney, New South Wales, Australia
| | - Alicia J Jenkins
- Sydney Medical School, The University of Sydney, Sydney, New South Wales, Australia
- NHMRC Clinical Trials Centre, Camperdown, New South Wales, Australia
| | - Christina A Bursill
- Heart Research Institute, Newtown, New South Wales, Australia
- Sydney Medical School, The University of Sydney, Sydney, New South Wales, Australia
- South Australian Health and Medical Research Institute, Adelaide, South Australia, Australia
- Faculty of Health and Medical Sciences, Adelaide Medical School, The University of Adelaide, Adelaide, South Australia, Australia
| | - Anthony C Keech
- Sydney Medical School, The University of Sydney, Sydney, New South Wales, Australia
- NHMRC Clinical Trials Centre, Camperdown, New South Wales, Australia
- Cardiology Department, Royal Prince Alfred Hospital, Camperdown, New South Wales, Australia
| | - Martin K C Ng
- Heart Research Institute, Newtown, New South Wales, Australia
- Sydney Medical School, The University of Sydney, Sydney, New South Wales, Australia
- Cardiology Department, Royal Prince Alfred Hospital, Camperdown, New South Wales, Australia
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Behnammanesh G, Durante ZE, Peyton KJ, Martinez-Lemus LA, Brown SM, Bender SB, Durante W. Canagliflozin Inhibits Human Endothelial Cell Proliferation and Tube Formation. Front Pharmacol 2019; 10:362. [PMID: 31057401 PMCID: PMC6477081 DOI: 10.3389/fphar.2019.00362] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2018] [Accepted: 03/22/2019] [Indexed: 12/13/2022] Open
Abstract
Recent clinical trials revealed that sodium-glucose co-transporter 2 (SGLT2) inhibitors significantly reduce cardiovascular events in type 2 diabetic patients, however, canagliflozin increased limb amputations, an effect not seen with other SGLT2 inhibitors. Since endothelial cell (EC) dysfunction promotes diabetes-associated vascular disease and limb ischemia, we hypothesized that canagliflozin, but not other SGLT2 inhibitors, impairs EC proliferation, migration, and angiogenesis. Treatment of human umbilical vein ECs (HUVECs) with clinically relevant concentrations of canagliflozin, but not empagliflozin or dapagliflozin, inhibited cell proliferation. In particular, 10 μM canagliflozin reduced EC proliferation by approximately 45%. The inhibition of EC growth by canagliflozin occurred in the absence of cell death and was associated with diminished DNA synthesis, cell cycle arrest, and a striking decrease in cyclin A expression. Restoration of cyclin A expression via adenoviral-mediated gene transfer partially rescued the proliferative response of HUVECs treated with canagliflozin. A high concentration of canagliflozin (50 μM) modestly inhibited HUVEC migration by 20%, but markedly attenuated their tube formation by 65% and EC sprouting from mouse aortas by 80%. A moderate 20% reduction in HUVEC migration was also observed with a high concentration of empagliflozin (50 μM), while neither empagliflozin nor dapagliflozin affected tube formation by HUVECs. The present study identified canagliflozin as a robust inhibitor of human EC proliferation and tube formation. The anti-proliferative action of canagliflozin occurs in the absence of cell death and is due, in part, to the blockade of cyclin A expression. Notably, these actions are not seen with empagliflozin or dapagliflozin. The ability of canagliflozin to exert these pleiotropic effects on ECs may contribute to the clinical actions of this drug.
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Affiliation(s)
- Ghazaleh Behnammanesh
- Department of Medical Pharmacology and Physiology, School of Medicine, University of Missouri, Columbia, MO, United States
| | - Zane E. Durante
- Department of Medical Pharmacology and Physiology, School of Medicine, University of Missouri, Columbia, MO, United States
| | - Kelly J. Peyton
- Department of Medical Pharmacology and Physiology, School of Medicine, University of Missouri, Columbia, MO, United States
| | - Luis A. Martinez-Lemus
- Department of Medical Pharmacology and Physiology, School of Medicine, University of Missouri, Columbia, MO, United States
- Dalton Cardiovascular Research Center, University of Missouri, Columbia, MO, United States
| | - Scott M. Brown
- Research Service, Harry S. Truman Memorial Veterans Hospital, Columbia, MO, United States
- Biomedical Sciences, University of Missouri, Columbia, MO, United States
| | - Shawn B. Bender
- Dalton Cardiovascular Research Center, University of Missouri, Columbia, MO, United States
- Research Service, Harry S. Truman Memorial Veterans Hospital, Columbia, MO, United States
- Biomedical Sciences, University of Missouri, Columbia, MO, United States
| | - William Durante
- Department of Medical Pharmacology and Physiology, School of Medicine, University of Missouri, Columbia, MO, United States
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Wu H, Li F, Shao W, Gao J, Ling D. Promoting Angiogenesis in Oxidative Diabetic Wound Microenvironment Using a Nanozyme-Reinforced Self-Protecting Hydrogel. ACS CENTRAL SCIENCE 2019; 5:477-485. [PMID: 30937375 PMCID: PMC6439452 DOI: 10.1021/acscentsci.8b00850] [Citation(s) in RCA: 169] [Impact Index Per Article: 33.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/18/2018] [Indexed: 05/02/2023]
Abstract
Impaired diabetic wound healing represents a devastating and rapidly growing clinical problem associated with high morbidity, mortality, and recurrence rates. Engineering therapeutic angiogenesis in the wounded tissue is critical for successful wound healing. However, stimulating functional angiogenesis of the diabetic wound remains a great challenge, due to the oxidative damage and denaturation of bio-macromolecule-based angiogenic agents in the oxidative diabetic wound microenvironment. Here, we present a unique "seed-and-soil" strategy that circumvents the limitation by simultaneously reshaping the oxidative wound microenvironment into a proregenerative one (the "soil") and providing proangiogenic miRNA cues (the "seed") using an miRNA-impregnated, redox-modulatory ceria nanozyme-reinforced self-protecting hydrogel (PCN-miR/Col). The PCN-miR/Col not only reshapes the hostile oxidative wound microenvironment, but also ensures the structural integrity of the encapsulated proangiogenic miRNA in the oxidative microenvironment. Diabetic wounds treated with the PCN-miR/Col demonstrate a remarkably accelerated wound closure and enhanced quality of the healed wound as featured by highly ordered alignment of collagen fiber, skin appendage morphogenesis, functional new blood vessel growth, and oxygen saturation.
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Affiliation(s)
- Haibin Wu
- Institute
of Pharmaceutics, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, P. R. China
| | - Fangyuan Li
- Institute
of Pharmaceutics, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, P. R. China
- Hangzhou
Institute of Innovative Medicine, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310012, P. R.
China
| | - Wei Shao
- Institute
of Pharmaceutics, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, P. R. China
| | - Jianqing Gao
- Institute
of Pharmaceutics, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, P. R. China
- Dr.
Li Dak Sum & Yip Yio Chin Center for Stem Cell and Regenerative
Medicine, Zhejiang University, Hangzhou 310058, P. R. China
- E-mail:
| | - Daishun Ling
- Institute
of Pharmaceutics, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, P. R. China
- Hangzhou
Institute of Innovative Medicine, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310012, P. R.
China
- Key
Laboratory of Biomedical Engineering of the Ministry of Education,
College of Biomedical Engineering & Instrument Science, Zhejiang University, Hangzhou 310027, P. R.
China
- E-mail:
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Zhou Z, Matsumoto T, Jankowski V, Pernow J, Mustafa SJ, Duncker DJ, Merkus D. Uridine adenosine tetraphosphate and purinergic signaling in cardiovascular system: An update. Pharmacol Res 2019; 141:32-45. [PMID: 30553823 PMCID: PMC6685433 DOI: 10.1016/j.phrs.2018.12.009] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/15/2018] [Revised: 10/26/2018] [Accepted: 12/12/2018] [Indexed: 02/07/2023]
Abstract
Uridine adenosine tetraphosphate (Up4A), biosynthesized by activation of vascular endothelial growth factor receptor (VEGFR) 2, was initially identified as a potent endothelium-derived vasoconstrictor in perfused rat kidney. Subsequently, the effect of Up4A on vascular tone regulation was intensively investigated in arteries isolated from different vascular beds in rodents including rat pulmonary arteries, aortas, mesenteric and renal arteries as well as mouse aortas, in which Up4A produces vascular contraction. In contrast, Up4A produces vascular relaxation in porcine coronary small arteries and rat aortas. Intravenous infusion of Up4A into conscious rats or mice decreases blood pressure, and intravenous bolus injection of Up4A into anesthetized mice increases coronary blood flow, indicating an overall vasodilator influence in vivo. Although Up4A is the first dinucleotide described that contains both purine and pyrimidine moieties, its cardiovascular effects are exerted mainly through activation of purinergic receptors. These effects not only encompass regulation of vascular tone, but also endothelial angiogenesis, smooth muscle cell proliferation and migration, and vascular calcification. Furthermore, this review discusses a potential role for Up4A in cardiovascular pathophysiology, as plasma levels of Up4A are elevated in juvenile hypertensive patients and Up4A-mediated vascular purinergic signaling changes in cardiovascular disease such as hypertension, diabetes, atherosclerosis and myocardial infarction. Better understanding the vascular effect of the novel dinucleotide Up4A and the purinergic signaling mechanisms mediating its effects will enhance its potential as target for treatment of cardiovascular disease.
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Affiliation(s)
- Zhichao Zhou
- Division of Cardiology, Department of Medicine, Karolinska University Hospital, Karolinska Institutet, Stockholm, Sweden.
| | - Takayuki Matsumoto
- Department of Physiology and Morphology, Institute of Medicinal Chemistry, Hoshi University, Tokyo, Japan
| | - Vera Jankowski
- RWTH-Aachen, Institute for Molecular Cardiovascular Research, Aachen, Germany
| | - John Pernow
- Division of Cardiology, Department of Medicine, Karolinska University Hospital, Karolinska Institutet, Stockholm, Sweden
| | - S Jamal Mustafa
- Department of Physiology, Pharmacology & Neuroscience, Center for Cardiovascular and Respiratory Sciences, Clinical and Translational Science Institute, West Virginia University, Morgantown, WV, United States
| | - Dirk J Duncker
- Division of Experimental Cardiology, Department of Cardiology, Thoraxcenter, Erasmus University Medical Center, Rotterdam, the Netherlands
| | - Daphne Merkus
- Division of Experimental Cardiology, Department of Cardiology, Thoraxcenter, Erasmus University Medical Center, Rotterdam, the Netherlands
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NOTCH1 signaling induces pathological vascular permeability in diabetic retinopathy. Proc Natl Acad Sci U S A 2019; 116:4538-4547. [PMID: 30787185 DOI: 10.1073/pnas.1814711116] [Citation(s) in RCA: 57] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
Diabetic macular edema is a major complication of diabetes resulting in loss of central vision. Although heightened vessel leakiness has been linked to glial and neuronal-derived factors, relatively little is known on the mechanisms by which mature endothelial cells exit from a quiescent state and compromise barrier function. Here we report that endothelial NOTCH1 signaling in mature diabetic retinas contributes to increased vascular permeability. By providing both human and mouse data, we show that NOTCH1 ligands JAGGED1 and DELTA LIKE-4 are up-regulated secondary to hyperglycemia and activate both canonical and rapid noncanonical NOTCH1 pathways that ultimately disrupt endothelial adherens junctions in diabetic retinas by causing dissociation of vascular endothelial-cadherin from β-catenin. We further demonstrate that neutralization of NOTCH1 ligands prevents diabetes-induced retinal edema. Collectively, these results identify a fundamental process in diabetes-mediated vascular permeability and provide translational rational for targeting the NOTCH pathway (primarily JAGGED1) in conditions characterized by compromised vascular barrier function.
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Paardekooper LM, Vos W, van den Bogaart G. Oxygen in the tumor microenvironment: effects on dendritic cell function. Oncotarget 2019; 10:883-896. [PMID: 30783517 PMCID: PMC6368231 DOI: 10.18632/oncotarget.26608] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2018] [Accepted: 01/09/2019] [Indexed: 12/13/2022] Open
Abstract
Solid tumors grow at a high speed leading to insufficient blood supply to tumor cells. This makes the tumor hypoxic, resulting in the Warburg effect and an increased generation of reactive oxygen species (ROS). Hypoxia and ROS affect immune cells in the tumor micro-environment, thereby affecting their immune function. Here, we review the known effects of hypoxia and ROS on the function and physiology of dendritic cells (DCs). DCs can (cross-)present tumor antigen to activate naive T cells, which play a pivotal role in anti-tumor immunity. ROS might enter DCs via aquaporins in the plasma membrane, diffusion across the plasma membrane or via extracellular vesicles (EVs) released by tumor cells. Hypoxia and ROS exert complex effects on DCs, and can both inhibit and activate maturation of immature DCs. Furthermore, ROS transferred by EVs and/or produced by the DC can both promote antigen (cross-)presentation through phagosomal alkalinization, which preserves antigens by inhibiting proteases, and by direct oxidative modification of proteases. Hypoxia leads to a more migratory and inflammatory DC phenotype. Lastly, hypoxia alters DCs to shift the T- cell response towards a tumor suppressive Th17 phenotype. From numerous studies, the concept is emerging that hypoxia and ROS are mutually dependent effectors on DC function in the tumor micro-environment. Understanding their precise roles and interplay is important given that an adaptive immune response is required to clear tumor cells.
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Affiliation(s)
- Laurent M Paardekooper
- Department of Tumor Immunology, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Willemijn Vos
- Department of Tumor Immunology, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Geert van den Bogaart
- Department of Tumor Immunology, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, Nijmegen, The Netherlands.,Department of Molecular Immunology, Groningen Biomolecular Sciences and Biotechnology Institute, University of Groningen, Groningen, The Netherlands
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