1
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Astrada A. Increasing angiogenesis factors in hypoxic diabetic wounds using siRNA nanotherapeutics. MOLECULAR THERAPY. NUCLEIC ACIDS 2024; 35:102142. [PMID: 38404503 PMCID: PMC10884967 DOI: 10.1016/j.omtn.2024.102142] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 02/27/2024]
Affiliation(s)
- Adam Astrada
- School of Nursing, Faculty of Health Sciences, Esa Unggul University, Jl. Arjuna Utana No. 9, Kebon Jeruk, West Jakarta, Jakarta 11510, Indonesia
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2
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Shaabani E, Sharifiaghdam M, Faridi-Majidi R, De Smedt SC, Braeckmans K, Fraire JC. Gene therapy to enhance angiogenesis in chronic wounds. MOLECULAR THERAPY - NUCLEIC ACIDS 2022; 29:871-899. [PMID: 36159590 PMCID: PMC9464651 DOI: 10.1016/j.omtn.2022.08.020] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Skin injuries and chronic non-healing wounds are one of the major global burdens on the healthcare systems worldwide due to their difficult-to-treat nature, associated co-morbidities, and high health care costs. Angiogenesis has a pivotal role in the wound-healing process, which becomes impaired in many chronic non-healing wounds, leading to several healing disorders and complications. Therefore, induction or promotion of angiogenesis can be considered a promising approach for healing of chronic wounds. Gene therapy is one of the most promising upcoming strategies for the treatment of chronic wounds. It can be classified into three main approaches: gene augmentation, gene silencing, and gene editing. Despite the increasing number of encouraging results obtained using nucleic acids (NAs) as active pharmaceutical ingredients of gene therapy, efficient delivery of NAs to their site of action (cytoplasm or nucleus) remains a key challenge. Selection of the right therapeutic cargo and delivery methods is crucial for a favorable prognosis of the healing process. This article presents an overview of gene therapy and non-viral delivery methods for angiogenesis induction in chronic wounds.
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3
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Bhar B, Chouhan D, Pai N, Mandal BB. Harnessing Multifaceted Next-Generation Technologies for Improved Skin Wound Healing. ACS APPLIED BIO MATERIALS 2021; 4:7738-7763. [PMID: 35006758 DOI: 10.1021/acsabm.1c00880] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Dysregulation of sequential and synchronized events of skin regeneration often results in the impairment of chronic wounds. Conventional wound dressings fail to trigger the normal healing mechanism owing to the pathophysiological conditions. Tissue engineering approaches that deal with the fabrication of dressings using various biomaterials, growth factors, and stem cells have shown accelerated healing outcomes. However, most of these technologies are associated with difficulties in scalability and cost-effectiveness of the products. In this review, we survey the latest developments in wound healing strategies that have recently emerged through the multidisciplinary approaches of bioengineering, nanotechnology, 3D bioprinting, and similar cutting-edge technologies to overcome the limitations of conventional therapies. We also focus on the potential of wearable technology that supports complete monitoring of the changes occurring in the wound microenvironment. In addition, we review the role of advanced devices that can precisely enable the delivery of nanotherapeutics, oligonucleotides, and external stimuli in a controlled manner. These technological advancements offer the opportunity to actively influence the regeneration process to benefit the treatment regime further. Finally, the clinical relevance, trajectory, and prospects of this field have been discussed in brief that highlights their potential in providing a beneficial wound care solution at an affordable cost.
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Affiliation(s)
- Bibrita Bhar
- Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati 781039, Assam, India
| | - Dimple Chouhan
- Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati 781039, Assam, India
| | - Nakhul Pai
- Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati 781039, Assam, India
| | - Biman B Mandal
- Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati 781039, Assam, India.,Centre for Nanotechnology, Indian Institute of Technology Guwahati, Guwahati 781039, Assam, India.,School of Health Science and Technology, Indian Institute of Technology Guwahati, Guwahati 781039, Assam, India
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4
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Berger AG, Chou JJ, Hammond PT. Approaches to Modulate the Chronic Wound Environment Using Localized Nucleic Acid Delivery. Adv Wound Care (New Rochelle) 2021; 10:503-528. [PMID: 32496978 PMCID: PMC8260896 DOI: 10.1089/wound.2020.1167] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2020] [Accepted: 05/14/2020] [Indexed: 02/06/2023] Open
Abstract
Significance: Nonhealing wounds have been the subject of decades of basic and clinical research. Despite new knowledge about the biology of impaired wound healing, little progress has been made in treating chronic wounds, leaving patients with few therapeutic options. Diabetic ulcers are a particularly common form of nonhealing wound. Recent Advances: Recently, investigation of therapeutic nucleic acids (TNAs), including plasmid DNA, small interfering RNA, microRNA mimics, anti-microRNA oligonucleotides, messenger RNA, and antisense oligonucleotides, has created a new treatment strategy for chronic wounds. TNAs can modulate the wound toward a prohealing environment by targeting gene pathways associated with inflammation, proteases, cell motility, angiogenesis, epithelialization, and oxidative stress. A variety of delivery systems have been investigated for TNAs, including dendrimers, lipid nanoparticles (NPs), polymeric micelles, polyplexes, metal NPs, and hydrogels. This review summarizes recent developments in TNA delivery for therapeutic targets associated with chronic wounds, with an emphasis on diabetic ulcers. Critical Issues: Translational potential of TNAs remains a key challenge; we highlight some drug delivery approaches for TNAs that may hold promise. We also describe current commercial efforts to locally deliver nucleic acids to modulate the wound environment. Future Directions: Localized nucleic acid delivery holds promise for the treatment of nonhealing chronic wounds. Future efforts to improve targeting of these nucleic acid therapies in the wound with both spatial and temporal control through drug delivery systems will be crucial to successful clinical translation.
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Affiliation(s)
- Adam G. Berger
- Institute for Soldier Nanotechnologies, Massachusetts Institute of Technology, Cambridge, Massachusetts, USA
- Harvard-MIT Health Sciences and Technology, Massachusetts Institute of Technology, Cambridge, Massachusetts, USA
- Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, Massachusetts, USA
| | - Jonathan J. Chou
- Institute for Soldier Nanotechnologies, Massachusetts Institute of Technology, Cambridge, Massachusetts, USA
- Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, Massachusetts, USA
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts, USA
| | - Paula T. Hammond
- Institute for Soldier Nanotechnologies, Massachusetts Institute of Technology, Cambridge, Massachusetts, USA
- Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, Massachusetts, USA
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts, USA
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5
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Shaabani E, Sharifiaghdam M, Lammens J, De Keersmaecker H, Vervaet C, De Beer T, Motevaseli E, Ghahremani MH, Mansouri P, De Smedt S, Raemdonck K, Faridi-Majidi R, Braeckmans K, Fraire JC. Increasing Angiogenesis Factors in Hypoxic Diabetic Wound Conditions by siRNA Delivery: Additive Effect of LbL-Gold Nanocarriers and Desloratadine-Induced Lysosomal Escape. Int J Mol Sci 2021; 22:9216. [PMID: 34502144 PMCID: PMC8431033 DOI: 10.3390/ijms22179216] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2021] [Revised: 08/16/2021] [Accepted: 08/24/2021] [Indexed: 12/23/2022] Open
Abstract
Impaired wound healing in people with diabetes has multifactorial causes, with insufficient neovascularization being one of the most important. Hypoxia-inducible factor-1 (HIF-1) plays a central role in the hypoxia-induced response by activating angiogenesis factors. As its activity is under precise regulatory control of prolyl-hydroxylase domain 2 (PHD-2), downregulation of PHD-2 by small interfering RNA (siRNA) could stabilize HIF-1α and, therefore, upregulate the expression of pro-angiogenic factors as well. Intracellular delivery of siRNA can be achieved with nanocarriers that must fulfill several requirements, including high stability, low toxicity, and high transfection efficiency. Here, we designed and compared the performance of layer-by-layer self-assembled siRNA-loaded gold nanoparticles with two different outer layers-Chitosan (AuNP@CS) and Poly L-arginine (AuNP@PLA). Although both formulations have exactly the same core, we find that a PLA outer layer improves the endosomal escape of siRNA, and therefore, transfection efficiency, after endocytic uptake in NIH-3T3 cells. Furthermore, we found that endosomal escape of AuNP@PLA could be improved further when cells were additionally treated with desloratadine, thus outperforming commercial reagents such as Lipofectamine® and jetPRIME®. AuNP@PLA in combination with desloratadine was proven to induce PHD-2 silencing in fibroblasts, allowing upregulation of pro-angiogenic pathways. This finding in an in vitro context constitutes a first step towards improving diabetic wound healing with siRNA therapy.
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Affiliation(s)
- Elnaz Shaabani
- Laboratory of General Biochemistry and Physical Pharmacy, Faculty of Pharmacy, Ghent University, Ottergemsesteenweg 460, 9000 Ghent, Belgium; (E.S.); (M.S.); (H.D.K.); (S.D.S.); (K.R.); (J.C.F.)
- Department of Medical Nanotechnology, School of Advanced Technologies in Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Maryam Sharifiaghdam
- Laboratory of General Biochemistry and Physical Pharmacy, Faculty of Pharmacy, Ghent University, Ottergemsesteenweg 460, 9000 Ghent, Belgium; (E.S.); (M.S.); (H.D.K.); (S.D.S.); (K.R.); (J.C.F.)
- Department of Medical Nanotechnology, School of Advanced Technologies in Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Joris Lammens
- Laboratory of Pharmaceutical Technology, Department of Pharmaceutics, Ghent University, Ottergemsesteenweg 460, 9000 Ghent, Belgium; (J.L.); (C.V.)
| | - Herlinde De Keersmaecker
- Laboratory of General Biochemistry and Physical Pharmacy, Faculty of Pharmacy, Ghent University, Ottergemsesteenweg 460, 9000 Ghent, Belgium; (E.S.); (M.S.); (H.D.K.); (S.D.S.); (K.R.); (J.C.F.)
- Center for Advanced Light Microscopy, Ghent University, 9000 Ghent, Belgium
| | - Chris Vervaet
- Laboratory of Pharmaceutical Technology, Department of Pharmaceutics, Ghent University, Ottergemsesteenweg 460, 9000 Ghent, Belgium; (J.L.); (C.V.)
| | - Thomas De Beer
- Laboratory of Pharmaceutical Process Analytical Technology (LPPAT), Department of Pharmaceutical Analysis, Ghent University, Ottergemsesteenweg 460, 9000 Ghent, Belgium;
| | - Elahe Motevaseli
- Department of Molecular Medicine, School of Advanced Technologies in Medicine, Tehran University of Medical Sciences, Tehran, Iran;
| | - Mohammad Hossein Ghahremani
- Department of Toxicology and Pharmacology, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran;
| | - Parvin Mansouri
- Skin and Stem Cell Research Center, Tehran University of Medical Sciences, Tehran, Iran;
| | - Stefaan De Smedt
- Laboratory of General Biochemistry and Physical Pharmacy, Faculty of Pharmacy, Ghent University, Ottergemsesteenweg 460, 9000 Ghent, Belgium; (E.S.); (M.S.); (H.D.K.); (S.D.S.); (K.R.); (J.C.F.)
- Center for Advanced Light Microscopy, Ghent University, 9000 Ghent, Belgium
| | - Koen Raemdonck
- Laboratory of General Biochemistry and Physical Pharmacy, Faculty of Pharmacy, Ghent University, Ottergemsesteenweg 460, 9000 Ghent, Belgium; (E.S.); (M.S.); (H.D.K.); (S.D.S.); (K.R.); (J.C.F.)
| | - Reza Faridi-Majidi
- Department of Medical Nanotechnology, School of Advanced Technologies in Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Kevin Braeckmans
- Laboratory of General Biochemistry and Physical Pharmacy, Faculty of Pharmacy, Ghent University, Ottergemsesteenweg 460, 9000 Ghent, Belgium; (E.S.); (M.S.); (H.D.K.); (S.D.S.); (K.R.); (J.C.F.)
- Center for Advanced Light Microscopy, Ghent University, 9000 Ghent, Belgium
| | - Juan C. Fraire
- Laboratory of General Biochemistry and Physical Pharmacy, Faculty of Pharmacy, Ghent University, Ottergemsesteenweg 460, 9000 Ghent, Belgium; (E.S.); (M.S.); (H.D.K.); (S.D.S.); (K.R.); (J.C.F.)
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6
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Chang KH, Shoureshi P, Lay F, Sebastian R, Alikhassy Habibabady Z, Born LJ, Marti GP, Meltzer SJ, Abraham JM, Harmon JW. Preconditioning of surgical pedicle flaps with DNA plasmid expressing hypoxia-inducible factor-1α (HIF-1α) promotes tissue viability. Gene Ther 2021; 28:319-328. [PMID: 33024315 DOI: 10.1038/s41434-020-00199-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2020] [Revised: 09/05/2020] [Accepted: 09/24/2020] [Indexed: 01/29/2023]
Abstract
Ischemic necrosis of surgical flaps after reconstruction is a major clinical problem. Hypoxia-inducible factor-1α (HIF-1α) is considered the master regulator of the adaptive response to hypoxia. Among its many properties, it regulates the expression of genes encoding angiogenic growth factors, which have a short half-life in vivo. To achieve a continuous application of the therapeutic, we utilized DNA plasmid delivery. Transcription of the DNA plasmid confirmed by qRT-PCR showed significantly increased mRNA for HIF-1α in the transfected tissue compared to saline control tissue. Rats were preconditioned by injecting with either HIF-1α DNA plasmid or saline intradermally in the designated flap region on each flank. Seven days after preconditioning, each rat had two isolated pedicle flaps raised with a sterile silicone sheet implanted between the skin flap and muscle layer. The flaps preconditioned with HIF-1α DNA plasmid had significantly less necrotic area. Angiogenesis measured by CD31 staining showed a significant increase in the number of vessels per high powered field in the HIF-1α group (p < 0.05). Our findings offer a potential therapeutic strategy for significantly promoting the viability of surgical pedicle flaps by ischemic preconditioning with HIF-1α DNA plasmid.
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Affiliation(s)
- Kai-Hua Chang
- Hendrix burn and Wound Healing Laboratory, Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, MD, USA.
| | - Pouria Shoureshi
- Hendrix burn and Wound Healing Laboratory, Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Frank Lay
- Hendrix burn and Wound Healing Laboratory, Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Raul Sebastian
- Department of Surgery, George Washington University School of Medicine and Health Science, Washington, DC, USA
| | | | - Louis J Born
- Fischell Department of Bioengineering, University of Maryland, College Park, MD, USA
| | - Guy P Marti
- Hendrix burn and Wound Healing Laboratory, Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, MD, USA.,Clinique Saint Jean l'Ermitage, Melun, France
| | - Stephen J Meltzer
- Division of Gastroenterology, Department of Medicine and Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - John M Abraham
- Hendrix burn and Wound Healing Laboratory, Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, MD, USA.,Division of Gastroenterology, Department of Medicine and Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - John W Harmon
- Hendrix burn and Wound Healing Laboratory, Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, MD, USA.
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7
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Strowitzki MJ, Kimmer G, Wehrmann J, Ritter AS, Radhakrishnan P, Opitz VM, Tuffs C, Biller M, Kugler J, Keppler U, Harnoss JM, Klose J, Schmidt T, Blanco A, Taylor CT, Schneider M. Inhibition of HIF-prolyl hydroxylases improves healing of intestinal anastomoses. JCI Insight 2021; 6:139191. [PMID: 33784253 PMCID: PMC8119215 DOI: 10.1172/jci.insight.139191] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2020] [Accepted: 03/24/2021] [Indexed: 12/15/2022] Open
Abstract
Anastomotic leakage (AL) accounts for a major part of in-house mortality in patients undergoing colorectal surgery. Local ischemia and abdominal sepsis are common risk factors contributing to AL and are characterized by upregulation of the hypoxia-inducible factor (HIF) pathway. The HIF pathway is critically regulated by HIF-prolyl hydroxylases (PHDs). Here, we investigated the significance of PHDs and the effects of pharmacologic PHD inhibition (PHI) during anastomotic healing. Ischemic or septic colonic anastomoses were created in mice by ligation of mesenteric vessels or lipopolysaccharide-induced abdominal sepsis, respectively. Genetic PHD deficiency (Phd1-/-, Phd2+/-, and Phd3-/-) or PHI were applied to manipulate PHD activity. Pharmacologic PHI and genetic PHD2 haplodeficiency (Phd2+/-) significantly improved healing of ischemic or septic colonic anastomoses, as indicated by increased bursting pressure and reduced AL rates. Only Phd2+/- (but not PHI or Phd1-/-) protected from sepsis-related mortality. Mechanistically, PHI and Phd2+/- induced immunomodulatory (M2) polarization of macrophages, resulting in increased collagen content and attenuated inflammation-driven immune cell recruitment. We conclude that PHI improves healing of colonic anastomoses in ischemic or septic conditions by Phd2+/--mediated M2 polarization of macrophages, conferring a favorable microenvironment for anastomotic healing. Patients with critically perfused colorectal anastomosis or abdominal sepsis could benefit from pharmacologic PHI.
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Affiliation(s)
- Moritz J Strowitzki
- Department of General, Visceral and Transplantation Surgery, Heidelberg University, Heidelberg, Germany.,School of Medicine and Conway Institute of Biomolecular & Biomedical Research, University College Dublin, Dublin, Ireland
| | - Gwendolyn Kimmer
- Department of General, Visceral and Transplantation Surgery, Heidelberg University, Heidelberg, Germany
| | - Julian Wehrmann
- Department of General, Visceral and Transplantation Surgery, Heidelberg University, Heidelberg, Germany
| | - Alina S Ritter
- Department of General, Visceral and Transplantation Surgery, Heidelberg University, Heidelberg, Germany
| | - Praveen Radhakrishnan
- Department of General, Visceral and Transplantation Surgery, Heidelberg University, Heidelberg, Germany
| | - Vanessa M Opitz
- Department of General, Visceral and Transplantation Surgery, Heidelberg University, Heidelberg, Germany
| | - Christopher Tuffs
- Department of General, Visceral and Transplantation Surgery, Heidelberg University, Heidelberg, Germany
| | - Marvin Biller
- Department of General, Visceral and Transplantation Surgery, Heidelberg University, Heidelberg, Germany
| | - Julia Kugler
- School of Medicine and Conway Institute of Biomolecular & Biomedical Research, University College Dublin, Dublin, Ireland
| | - Ulrich Keppler
- Department of General, Visceral and Transplantation Surgery, Heidelberg University, Heidelberg, Germany.,Department of Anaesthesiology, Heidelberg University, Heidelberg, Germany
| | - Jonathan M Harnoss
- Department of General, Visceral and Transplantation Surgery, Heidelberg University, Heidelberg, Germany
| | - Johannes Klose
- Department of General, Visceral and Transplantation Surgery, Heidelberg University, Heidelberg, Germany
| | - Thomas Schmidt
- Department of General, Visceral and Transplantation Surgery, Heidelberg University, Heidelberg, Germany
| | - Alfonso Blanco
- Flow Cytometry Core Technology. Conway Institute of Biomolecular & Biomedical Research, University College Dublin, Dublin, Ireland
| | - Cormac T Taylor
- School of Medicine and Conway Institute of Biomolecular & Biomedical Research, University College Dublin, Dublin, Ireland
| | - Martin Schneider
- Department of General, Visceral and Transplantation Surgery, Heidelberg University, Heidelberg, Germany
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8
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Du W, Ren L, Hamblin MH, Fan Y. Endothelial Cell Glucose Metabolism and Angiogenesis. Biomedicines 2021; 9:biomedicines9020147. [PMID: 33546224 PMCID: PMC7913320 DOI: 10.3390/biomedicines9020147] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2020] [Revised: 01/31/2021] [Accepted: 01/31/2021] [Indexed: 12/14/2022] Open
Abstract
Angiogenesis, a process of new blood vessel formation from the pre-existing vascular bed, is a critical event in various physiological and pathological settings. Over the last few years, the role of endothelial cell (EC) metabolism in angiogenesis has received considerable attention. Accumulating studies suggest that ECs rely on aerobic glycolysis, rather than the oxidative phosphorylation pathway, to produce ATP during angiogenesis. To date, numerous critical regulators of glucose metabolism, fatty acid oxidation, and glutamine metabolism have been identified to modulate the EC angiogenic switch and pathological angiogenesis. The unique glycolytic feature of ECs is critical for cell proliferation, migration, and responses to environmental changes. In this review, we provide an overview of recent EC glucose metabolism studies, particularly glycolysis, in quiescent and angiogenic ECs. We also summarize and discuss potential therapeutic strategies that take advantage of EC metabolism. The elucidation of metabolic regulation and the precise underlying mechanisms could facilitate drug development targeting EC metabolism to treat angiogenesis-related diseases.
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Affiliation(s)
- Wa Du
- Department of Cancer Biology, University of Cincinnati College of Medicine, Cincinnati, OH 45267, USA; (W.D.); (L.R.)
| | - Lu Ren
- Department of Cancer Biology, University of Cincinnati College of Medicine, Cincinnati, OH 45267, USA; (W.D.); (L.R.)
| | - Milton H. Hamblin
- Department of Pharmacology, Tulane University School of Medicine, New Orleans, LA 70112, USA;
| | - Yanbo Fan
- Department of Cancer Biology, University of Cincinnati College of Medicine, Cincinnati, OH 45267, USA; (W.D.); (L.R.)
- Department of Internal Medicine, Division of Cardiovascular Health and Diseases, University of Cincinnati College of Medicine, Cincinnati, OH 45267, USA
- Correspondence:
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9
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Wang Y, Shao T, Wang J, Huang X, Deng X, Cao Y, Zhou M, Zhao C. An update on potential biomarkers for diagnosing diabetic foot ulcer at early stage. Biomed Pharmacother 2020; 133:110991. [PMID: 33227713 DOI: 10.1016/j.biopha.2020.110991] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2020] [Revised: 11/01/2020] [Accepted: 11/05/2020] [Indexed: 01/01/2023] Open
Abstract
As one of major chronic complications of diabetes, diabetic foot ulcer (DFU) is the main cause of disability and death. The clinical diagnosis and prognosis of DFU is inadequate. For clinicians, if the risk stratification of DFU can be obtained earlier in diabetic patients, the hospitalization, disability and mortality rate will be reduced. In addition to the inflammatory biomarkers that have been widely concerned and used, e.g., procalcitonin, pentraxin-3, C-reactive protein (CRP), interleukins (ILs), and tumor necrosis factor-α (TNF-α), etc., a more comprehensive prediction of the risk and severity of DFU is needed to reflect new biomarkers for therapeutic intervention effects. Along with the development of systems biology technology, genomics, proteomics, metabolomics and microbiome have been used in the studies on DFU for better understanding of the disease. In this review, new biomarkers that are expected to assist in the accurate diagnosis and risk stratification of DFU will be discussed and summarized in detail.
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Affiliation(s)
- Yuqing Wang
- Shanghai Traditional Chinese Medicine Integrated Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, 200082, China; Graduate School, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, China
| | - Tengteng Shao
- Shanghai Traditional Chinese Medicine Integrated Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, 200082, China; Graduate School, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, China
| | - Jialin Wang
- Shanghai Traditional Chinese Medicine Integrated Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, 200082, China; Graduate School, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, China
| | - Xiaoting Huang
- Shanghai Traditional Chinese Medicine Integrated Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, 200082, China; Graduate School, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, China
| | - Xiaofei Deng
- Shanghai Traditional Chinese Medicine Integrated Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, 200082, China
| | - Yemin Cao
- Shanghai Traditional Chinese Medicine Integrated Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, 200082, China
| | - Mingmei Zhou
- Shanghai Traditional Chinese Medicine Integrated Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, 200082, China; Center for Chinese Medicine Therapy and Systems Biology, Institute for Interdisciplinary Medicine Sciences, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, China.
| | - Cheng Zhao
- Shanghai Traditional Chinese Medicine Integrated Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, 200082, China.
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10
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Huynh P, Phie J, Krishna SM, Golledge J. Systematic review and meta-analysis of mouse models of diabetes-associated ulcers. BMJ Open Diabetes Res Care 2020; 8:8/1/e000982. [PMID: 32467222 PMCID: PMC7259859 DOI: 10.1136/bmjdrc-2019-000982] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/16/2019] [Revised: 02/29/2020] [Accepted: 04/18/2020] [Indexed: 12/14/2022] Open
Abstract
Mouse models are frequently used to study diabetes-associated ulcers, however, whether these models accurately simulate impaired wound healing has not been thoroughly investigated. This systematic review aimed to determine whether wound healing is impaired in mouse models of diabetes and assess the quality of the past research. A systematic literature search was performed of publicly available databases to identify original articles examining wound healing in mouse models of diabetes. A meta-analysis was performed to examine the effect of diabetes on wound healing rate using random effect models. A meta-regression was performed to examine the effect of diabetes duration on wound healing impairment. The quality of the included studies was also assessed using two newly developed tools. 77 studies using eight different models of diabetes within 678 non-diabetic and 720 diabetic mice were included. Meta-analysis showed that wound healing was impaired in all eight models. Meta-regression suggested that longer duration of diabetes prior to wound induction was correlated with greater degree of wound healing impairment. Pairwise comparisons suggested that non-obese diabetic mice exhibited more severe wound healing impairment compared with db/db mice, streptozotocin-induced diabetic mice or high-fat fed mice at an intermediate stage of wound healing (p<0.01). Quality assessment suggested that the prior research frequently lacked incorporation of key clinically relevant characteristics. This systematic review suggested that impaired wound healing can be simulated in many different mouse models of diabetes but these require further refinement to become more clinically relevant.
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Affiliation(s)
- Pacific Huynh
- Queensland Research Centre for Peripheral Vascular Disease, James Cook University, Townsville, Queensland, Australia
| | - James Phie
- Queensland Research Centre for Peripheral Vascular Disease, James Cook University, Townsville, Queensland, Australia
| | - Smriti Murali Krishna
- Queensland Research Centre for Peripheral Vascular Disease, James Cook University, Townsville, Queensland, Australia
| | - Jonathan Golledge
- Queensland Research Centre for Peripheral Vascular Disease, James Cook University, Townsville, Queensland, Australia
- Department of Vascular and Endovascular Surgery, Townsville University Hospital, Townsville, Queensland, Australia
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11
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Taheem DK, Jell G, Gentleman E. Hypoxia Inducible Factor-1α in Osteochondral Tissue Engineering. TISSUE ENGINEERING. PART B, REVIEWS 2020; 26:105-115. [PMID: 31774026 PMCID: PMC7166133 DOI: 10.1089/ten.teb.2019.0283] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/16/2019] [Accepted: 11/19/2019] [Indexed: 12/19/2022]
Abstract
Damage to osteochondral (OC) tissues can lead to pain, loss of motility, and progress to osteoarthritis. Tissue engineering approaches offer the possibility of replacing damaged tissues and restoring joint function; however, replicating the spatial and functional heterogeneity of native OC tissue remains a pressing challenge. Chondrocytes in healthy cartilage exist in relatively low-oxygen conditions, while osteoblasts in the underlying bone experience higher oxygen pressures. Such oxygen gradients also exist in the limb bud, where they influence OC tissue development. The cellular response to these spatial variations in oxygen pressure, which is mediated by the hypoxia inducible factor (HIF) pathway, plays a central role in regulating osteo- and chondrogenesis by directing progenitor cell differentiation and promoting and maintaining appropriate extracellular matrix production. Understanding the role of the HIF pathway in OC tissue development may enable new approaches to engineer OC tissue. In this review, we discuss strategies to spatially and temporarily regulate the HIF pathway in progenitor cells to create functional OC tissue for regenerative therapies. Impact statement Strategies to engineer osteochondral (OC) tissue are limited by the complex and varying microenvironmental conditions in native bone and cartilage. Indeed, native cartilage experiences low-oxygen conditions, while the underlying bone is relatively normoxic. The cellular response to these low-oxygen conditions, which is mediated through the hypoxia inducible factor (HIF) pathway, is known to promote and maintain the chondrocyte phenotype. By using tissue engineering scaffolds to spatially and temporally harness the HIF pathway, it may be possible to improve OC tissue engineering strategies for the regeneration of damaged cartilage and its underlying subchondral bone.
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Affiliation(s)
- Dheraj K. Taheem
- Centre for Craniofacial and Regenerative Biology, King's College London, London, United Kingdom
| | - Gavin Jell
- Division of Surgery and Interventional Sciences, University College London, London, United Kingdom
| | - Eileen Gentleman
- Centre for Craniofacial and Regenerative Biology, King's College London, London, United Kingdom
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12
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Hopfner U, Maan ZN, Hu MS, Aitzetmüller MM, Zaussinger M, Kirsch M, Machens HG, Duscher D. Deferoxamine enhances the regenerative potential of diabetic Adipose Derived Stem Cells. J Plast Reconstr Aesthet Surg 2020; 73:1738-1746. [PMID: 32418841 DOI: 10.1016/j.bjps.2020.02.045] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2019] [Revised: 12/05/2019] [Accepted: 02/16/2020] [Indexed: 12/23/2022]
Abstract
INTRODUCTION Diabetes mellitus remains a significant public health problem, consuming over $400 billion every year. While Diabetes itself can be controlled effectively, impaired wound healing still occurs frequently in diabetic patients. Adipose-derived mesenchymal stem cells (ASCs) provide an especially appealing source for diabetic wound cell therapy. With autologous approaches, the functionality of ASCs largely underlie patient-dependent factors. Diabetes is a significant diminishing factor of MSC functionality. Here, we explore a novel strategy to enhance diabetic ASC functionality through deferoxamine (DFO) preconditioning. MATERIAL AND METHODS Human diabetic ASCs have been preconditioned with 150 µM and 300 µM DFO in vitro and analyzed for regenerative cytokine expression. Murine diabetic ASCs have been preconditioned with 150 µM DFO examined for their in vitro and in vivo vasculogenic capacity in Matrigel assays. Additionally, a diabetic murine wound healing model has been performed to assess the regenerative capacity of preconditioned cells. RESULTS DFO preconditioning enhances the VEGF expression of human diabetic ASCs through hypoxia-inducible factor upregulation. The use of 150 µM of DFO was an optimal concentration to induce regenerative effects. The vasculogenic potential of preconditioned diabetic ASCs is significantly greater in vitro and in vivo. The enhanced regenerative functionality of DFO preconditioned ASCs was further confirmed in a model of diabetic murine wound healing. CONCLUSION These results demonstrate that DFO significantly induced the upregulation of hypoxia-inducible factor-1 alpha and VEGF in diabetic ASCs and showed efficacy in the treatment of diabetes-associated deficits of wound healing. The favorable status of DFO as a small molecule drug approved since decades for multiple indications makes this approach highly translatable.
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Affiliation(s)
- Ursula Hopfner
- Department for Plastic Surgery and Hand Surgery, Klinikum rechts der Isar, Technical University of Munich, Germany
| | - Zeshaan N Maan
- Hagey Laboratory for Pediatric Regenerative Medicine, Stanford University School of Medicine, Stanford, California, USA
| | - Michael S Hu
- Department for Plastic Surgery, University of Pittsburgh, Pennsylvania, USA
| | - Matthias M Aitzetmüller
- Department for Plastic Surgery and Hand Surgery, Klinikum rechts der Isar, Technical University of Munich, Germany
| | - Maximilian Zaussinger
- Department for Plastic Surgery and Hand Surgery, Klinikum rechts der Isar, Technical University of Munich, Germany
| | - Manuela Kirsch
- Department for Plastic Surgery and Hand Surgery, Klinikum rechts der Isar, Technical University of Munich, Germany
| | - Hans-Günther Machens
- Department for Plastic Surgery and Hand Surgery, Klinikum rechts der Isar, Technical University of Munich, Germany
| | - Dominik Duscher
- Department for Plastic Surgery and Hand Surgery, Klinikum rechts der Isar, Technical University of Munich, Germany; Division for Plastic and Reconstructive Surgery, Kepler University Hospital, Linz, Austria.
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13
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Olson E, Mahar KM, Morgan L, Fillmore C, Holland C, Lavery L. Randomized Phase I Trial to Evaluate the Safety, Tolerability, Pharmacokinetics, and Pharmacodynamics of Topical Daprodustat in Healthy Volunteers and in Patients With Diabetic Foot Ulcers. Clin Pharmacol Drug Dev 2019; 8:765-778. [PMID: 30720931 DOI: 10.1002/cpdd.654] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2018] [Accepted: 12/18/2018] [Indexed: 11/12/2022]
Abstract
Daprodustat, a small-molecule inhibitor of prolyl hydroxylases, prevents breakdown of hypoxia-inducible factor (HIF), leading to increased transcription of HIF-responsive genes. This randomized, placebo-controlled study evaluated the safety, tolerability, and pharmacokinetics of a topical formulation of daprodustat in healthy volunteers (intact skin) and in patients with diabetic foot ulcers (DFUs) following single and/or 14-day repeat-dose administration. In the diabetic patients, exploratory assessments of wound area, volume, and depth were made to qualitatively assess effectiveness. Systemic absorption via topical application was limited across doses up to 1.0% at 100 mg/cm2 for 14 days. Systemic pharmacokinetics were quantifiable in a few samples from a few patients. Because only sporadic concentrations were observed versus pharmacokinetic profiles, pharmacokinetic parameters were not determined. Wound area, depth, and volume showed consistent but weak improvements in the treatment arm; however, the variability in response and small sample size of the standard-of-care and placebo arms limited the ability to assess trends in wound healing compared with the daprodustat arm. Overall, topically applied daprodustat was well tolerated, raised no safety concerns, and provided limited to nonquantifiable systemic exposures. The healing of DFUs will need to be evaluated in studies designed to test this hypothesis over a longer treatment duration.
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Affiliation(s)
| | | | | | | | | | - Lawrence Lavery
- University of Texas Southwestern Medical Center at Dallas, Dallas, TX, USA
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14
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Kasiewicz LN, Whitehead KA. Lipid nanoparticles silence tumor necrosis factor α to improve wound healing in diabetic mice. Bioeng Transl Med 2019; 4:75-82. [PMID: 30680320 PMCID: PMC6336737 DOI: 10.1002/btm2.10123] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2018] [Revised: 11/11/2018] [Accepted: 11/19/2018] [Indexed: 12/13/2022] Open
Abstract
Diabetes mellitus is a mounting concern in the United States, as are the mortality and morbidity that result from its complications. Of particular concern, diabetes patients frequently suffer from impaired wound healing and resultant nonhealing diabetic foot ulcers. These ulcers overproduce tumor necrosis factor α (TNFα), which reduces wound bed cell migration and proliferation while encouraging apoptosis. Herein, we describe the use of siRNA-loaded lipid nanoparticles (LNPs) as a potential wound treatment to combat an overzealous immune response and facilitate wound closure. LNPs were formulated with an ionizable, degradable lipidoid and siRNA specific for TNFα. Topical application of nanoparticles reduced TNFα mRNA expression in the wound by 40-55% in diabetic and nondiabetic mice. In diabetic mice, this TNFα knockdown accelerated wound healing compared to untreated controls. Together, these results serve as proof-of-concept that RNA interference therapy using LNPs can reduce the severity and duration of chronic diabetic wounds.
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Affiliation(s)
- Lisa N. Kasiewicz
- Dept. of Chemical EngineeringCarnegie Mellon University5000 Forbes Avenue, PittsburghPA15213
| | - Kathryn A. Whitehead
- Dept. of Chemical EngineeringCarnegie Mellon University5000 Forbes Avenue, PittsburghPA15213
- Dept. of Biomedical EngineeringCarnegie Mellon University5000 Forbes Avenue, PittsburghPA15213
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15
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Dallas A, Trotsyuk A, Ilves H, Bonham CA, Rodrigues M, Engel K, Barrera JA, Kosaric N, Stern-Buchbinder ZA, White A, Mandell KJ, Hammond PT, Mansbridge J, Jayasena S, Gurtner GC, Johnston BH. Acceleration of Diabetic Wound Healing with PHD2- and miR-210-Targeting Oligonucleotides. Tissue Eng Part A 2018; 25:44-54. [PMID: 29644938 DOI: 10.1089/ten.tea.2017.0484] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
Abstract
In diabetes-associated chronic wounds, the normal response to hypoxia is impaired and many cellular processes involved in wound healing are hindered. Central to the hypoxia response is hypoxia-inducible factor-1α (HIF-1α), which activates multiple factors that enhance wound healing by promoting cellular motility and proliferation, new vessel formation, and re-epithelialization. Prolyl hydroxylase domain-containing protein 2 (PHD2) regulates HIF-1α activity by targeting it for degradation under normoxia. HIF-1α also upregulates microRNA miR-210, which in turn regulates proteins involved in cell cycle control, DNA repair, and mitochondrial respiration in ways that are antagonistic to wound repair. We have identified a highly potent short synthetic hairpin RNA (sshRNA) that inhibits expression of PHD2 and an antisense oligonucleotide (antimiR) that inhibits miR-210. Both oligonucleotides were chemically modified for improved biostability and to mitigate potential immunostimulatory effects. Using the sshRNA to silence PHD2 transcripts stabilizes HIF-1α and, in combination with the antimiR targeting miR-210, increases proliferation and migration of keratinocytes in vitro. To assess activity and delivery in an impaired wound healing model in diabetic mice, PHD2-targeting sshRNAs and miR-210 antimiRs both alone and in combination were formulated for local delivery to wounds using layer-by-layer (LbL) technology. LbL nanofabrication was applied to incorporate sshRNA into a thin polymer coating on a Tegaderm mesh. This coating gradually degrades under physiological conditions, releasing sshRNA and antimiR for sustained cellular uptake. Formulated treatments were applied directly to splinted full-thickness excisional wounds in db/db mice. Cellular uptake was confirmed using fluorescent sshRNA. Wounds treated with a single application of PHD2 sshRNA or antimiR-210 closed 4 days faster than untreated wounds, and wounds treated with both oligonucleotides closed on average 4.75 days faster. Markers for neovascularization and cell proliferation (CD31 and Ki67, respectively) were increased in the wound area following treatment, and vascular endothelial growth factor (VEGF) was increased in sshRNA-treated wounds. Our results suggest that silencing of PHD2 and miR-210 either together or separately by localized delivery of sshRNAs and antimiRs is a promising approach for the treatment of chronic wounds, with the potential for rapid clinical translation.
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Affiliation(s)
| | - Artem Trotsyuk
- 2 Department of Surgery, Stanford University School of Medicine, Stanford, California
| | | | - Clark A Bonham
- 2 Department of Surgery, Stanford University School of Medicine, Stanford, California
| | - Melanie Rodrigues
- 2 Department of Surgery, Stanford University School of Medicine, Stanford, California
| | - Karl Engel
- 2 Department of Surgery, Stanford University School of Medicine, Stanford, California
| | - Janos A Barrera
- 2 Department of Surgery, Stanford University School of Medicine, Stanford, California
| | - Nina Kosaric
- 2 Department of Surgery, Stanford University School of Medicine, Stanford, California
| | | | | | | | - Paula T Hammond
- 4 Koch Institute, Massachusetts Institute of Technology, Cambridge, Massachusetts
| | | | | | - Geoffrey C Gurtner
- 2 Department of Surgery, Stanford University School of Medicine, Stanford, California
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16
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Instructive microenvironments in skin wound healing: Biomaterials as signal releasing platforms. Adv Drug Deliv Rev 2018; 129:95-117. [PMID: 29627369 DOI: 10.1016/j.addr.2018.03.012] [Citation(s) in RCA: 97] [Impact Index Per Article: 16.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2017] [Revised: 03/16/2018] [Accepted: 03/27/2018] [Indexed: 12/16/2022]
Abstract
Skin wound healing aims to repair and restore tissue through a multistage process that involves different cells and signalling molecules that regulate the cellular response and the dynamic remodelling of the extracellular matrix. Nowadays, several therapies that combine biomolecule signals (growth factors and cytokines) and cells are being proposed. However, a lack of reliable evidence of their efficacy, together with associated issues such as high costs, a lack of standardization, no scalable processes, and storage and regulatory issues, are hampering their application. In situ tissue regeneration appears to be a feasible strategy that uses the body's own capacity for regeneration by mobilizing host endogenous stem cells or tissue-specific progenitor cells to the wound site to promote repair and regeneration. The aim is to engineer instructive systems to regulate the spatio-temporal delivery of proper signalling based on the biological mechanisms of the different events that occur in the host microenvironment. This review describes the current state of the different signal cues used in wound healing and skin regeneration, and their combination with biomaterial supports to create instructive microenvironments for wound healing.
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17
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Inhibiting PHD2 in bone marrow mesenchymal stem cells via lentiviral vector-mediated RNA interference facilitates the repair of periodontal tissue defects in SD rats. Oncotarget 2017; 8:72676-72699. [PMID: 29069818 PMCID: PMC5641161 DOI: 10.18632/oncotarget.20243] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2017] [Accepted: 07/25/2017] [Indexed: 11/25/2022] Open
Abstract
Hypoxia-inducible factors (HIFs) play an important role in angiogenesis, and they can activate the expression of several downstream angiogenic factors. HIF-1 is a major transcriptor of HIFs, composed of α and β subunits. Prolyl hydroxylase domain-containing protein 2 (PHD2) is the main catabolic enzyme for HIF-1α, and it can accelerate its degradation under normoxic conditions. PHD2 expression in bone marrow mesenchymal stem cells (BMMSCs) of SD rats was down-regulated under normoxic conditions in this study by utilizing lentiviral vector-mediated RNA interference to promote HIF-1α accumulation, thus enhancing the expression of angiogenic factors. A tissue-engineered compound was constructed using the composite collagen membrane of BMMSCs after PHD2 gene silencing to repair periodontal fenestration defects in SD rats. The results of this study indicated that, after PHD2 gene silencing, the osteogenic differentiation of BMMSCs was enhanced in vitro, the resistance of cells to oxidative stress was also validated in vitro, thereby illustrating the promotion of the repair of artificially constructed periodontal tissue defects in rats. The results of this study provide a reference and guidance for future applications of RNA interference in periodontal tissue engineering and serve as a basis for improving the survival of seed cells in recipient tissues.
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18
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Jeong KH, Park D, Lee YC. Polymer-based hydrogel scaffolds for skin tissue engineering applications: a mini-review. JOURNAL OF POLYMER RESEARCH 2017. [DOI: 10.1007/s10965-017-1278-4] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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19
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Sustained delivery of siRNA poly- and lipopolyplexes from porous macromer-crosslinked gelatin gels. Int J Pharm 2017; 526:178-187. [DOI: 10.1016/j.ijpharm.2017.04.065] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2017] [Revised: 04/25/2017] [Accepted: 04/26/2017] [Indexed: 01/15/2023]
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20
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Rabbani PS, Zhou A, Borab ZM, Frezzo JA, Srivastava N, More HT, Rifkin WJ, David JA, Berens SJ, Chen R, Hameedi S, Junejo MH, Kim C, Sartor RA, Liu CF, Saadeh PB, Montclare JK, Ceradini DJ. Novel lipoproteoplex delivers Keap1 siRNA based gene therapy to accelerate diabetic wound healing. Biomaterials 2017; 132:1-15. [PMID: 28391065 DOI: 10.1016/j.biomaterials.2017.04.001] [Citation(s) in RCA: 90] [Impact Index Per Article: 12.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2017] [Revised: 03/29/2017] [Accepted: 04/03/2017] [Indexed: 12/20/2022]
Abstract
Therapeutics utilizing siRNA are currently limited by the availability of safe and effective delivery systems. Cutaneous diseases, specifically ones with significant genetic components are ideal candidates for topical siRNA based therapy but the anatomical structure of skin presents a considerable hurdle. Here, we optimized a novel liposome and protein hybrid nanoparticle delivery system for the topical treatment of diabetic wounds with severe oxidative stress. We utilized a cationic lipid nanoparticle (CLN) composed of 1,2-dioleoyl-3-trimethylammonium-propane (DOTAP) and the edge activator sodium cholate (NaChol), in a 6:1 ratio of DOTAP:NaChol (DNC). Addition of a cationic engineered supercharged coiled-coil protein (CSP) in a 10:1:1 ratio of DNC:CSP:siRNA produced a stable lipoproteoplex (LPP) nanoparticle, with optimal siRNA complexation, minimal cytotoxicity, and increased transfection efficacy. In a humanized murine diabetic wound healing model, our optimized LPP formulation successfully delivered siRNA targeted against Keap1, key repressor of Nrf2 which is a central regulator of redox mechanisms. Application of LPP complexing siKeap1 restored Nrf2 antioxidant function, accelerated diabetic tissue regeneration, and augmented reduction-oxidation homeostasis in the wound environment. Our topical LPP delivery system can readily be translated into clinical use for the treatment of diabetic wounds and can be extended to other cutaneous diseases with genetic components.
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Affiliation(s)
- Piul S Rabbani
- New York University School of Medicine, Hansjörg Wyss Department of Plastic and Reconstructive Surgery, 430 East 29th Street, New York, NY, 10016, United States
| | - Anna Zhou
- New York University School of Medicine, Hansjörg Wyss Department of Plastic and Reconstructive Surgery, 430 East 29th Street, New York, NY, 10016, United States
| | - Zachary M Borab
- New York University School of Medicine, Hansjörg Wyss Department of Plastic and Reconstructive Surgery, 430 East 29th Street, New York, NY, 10016, United States
| | - Joseph A Frezzo
- New York University Tandon School of Engineering, Chemical and Biomolecular Engineering Department, 6 Metrotech Center, Brooklyn, NY 11201, United States
| | - Nikita Srivastava
- New York University Tandon School of Engineering, Chemical and Biomolecular Engineering Department, 6 Metrotech Center, Brooklyn, NY 11201, United States
| | - Haresh T More
- New York University Tandon School of Engineering, Chemical and Biomolecular Engineering Department, 6 Metrotech Center, Brooklyn, NY 11201, United States
| | - William J Rifkin
- New York University School of Medicine, Hansjörg Wyss Department of Plastic and Reconstructive Surgery, 430 East 29th Street, New York, NY, 10016, United States
| | - Joshua A David
- New York University School of Medicine, Hansjörg Wyss Department of Plastic and Reconstructive Surgery, 430 East 29th Street, New York, NY, 10016, United States
| | - Samuel J Berens
- New York University Tandon School of Engineering, Chemical and Biomolecular Engineering Department, 6 Metrotech Center, Brooklyn, NY 11201, United States
| | - Raymond Chen
- New York University Tandon School of Engineering, Chemical and Biomolecular Engineering Department, 6 Metrotech Center, Brooklyn, NY 11201, United States
| | - Sophia Hameedi
- New York University School of Medicine, Hansjörg Wyss Department of Plastic and Reconstructive Surgery, 430 East 29th Street, New York, NY, 10016, United States
| | - Muhammad H Junejo
- New York University School of Medicine, Hansjörg Wyss Department of Plastic and Reconstructive Surgery, 430 East 29th Street, New York, NY, 10016, United States
| | - Camille Kim
- New York University School of Medicine, Hansjörg Wyss Department of Plastic and Reconstructive Surgery, 430 East 29th Street, New York, NY, 10016, United States
| | - Rita A Sartor
- New York University School of Medicine, Hansjörg Wyss Department of Plastic and Reconstructive Surgery, 430 East 29th Street, New York, NY, 10016, United States
| | - Che F Liu
- New York University Tandon School of Engineering, Chemical and Biomolecular Engineering Department, 6 Metrotech Center, Brooklyn, NY 11201, United States
| | - Pierre B Saadeh
- New York University School of Medicine, Hansjörg Wyss Department of Plastic and Reconstructive Surgery, 430 East 29th Street, New York, NY, 10016, United States
| | - Jin K Montclare
- New York University Tandon School of Engineering, Chemical and Biomolecular Engineering Department, 6 Metrotech Center, Brooklyn, NY 11201, United States; New York University, Chemistry Department, 100 Washington Square East, New York, NY 10003, United States
| | - Daniel J Ceradini
- New York University School of Medicine, Hansjörg Wyss Department of Plastic and Reconstructive Surgery, 430 East 29th Street, New York, NY, 10016, United States.
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21
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Sinha I, Sakthivel D, Olenchock BA, Kruse CR, Williams J, Varon DE, Smith JD, Madenci AL, Nuutila K, Wagers AJ. Prolyl Hydroxylase Domain-2 Inhibition Improves Skeletal Muscle Regeneration in a Male Murine Model of Obesity. Front Endocrinol (Lausanne) 2017; 8:153. [PMID: 28725215 PMCID: PMC5497248 DOI: 10.3389/fendo.2017.00153] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/03/2017] [Accepted: 06/20/2017] [Indexed: 12/21/2022] Open
Abstract
Obesity leads to a loss of muscle mass and impaired muscle regeneration. In obese individuals, pathologically elevated levels of prolyl hydroxylase domain enzyme 2 (PHD2) limit skeletal muscle hypoxia-inducible factor-1 alpha and vascular endothelial growth factor (VEGF) expression. Loss of local VEGF may further impair skeletal muscle regeneration. We hypothesized that PHD2 inhibition would restore vigorous muscle regeneration in a murine model of obesity. Adult (22-week-old) male mice were fed either a high-fat diet (HFD), with 60% of calories derived from fat, or a regular diet (RD), with 10% of calories derived from fat, for 16 weeks. On day 5 following cryoinjury to the tibialis anterior muscle, newly regenerated muscle fiber cross-sectional areas were significantly smaller in mice fed an HFD as compared to RD, indicating an impaired regenerative response. Cryoinjured gastrocnemius muscles of HFD mice also showed elevated PHD2 levels (twofold higher) and reduced VEGF levels (twofold lower) as compared to RD. Dimethyloxalylglycine, a cell permeable competitive inhibitor of PHD2, restored VEGF levels and significantly improved regenerating myofiber size in cryoinjured mice fed an HFD. We conclude that pathologically increased PHD2 in the obese state drives impairments in muscle regeneration, in part by blunting VEGF production. Inhibition of PHD2 over activity in the obese state normalizes VEGF levels and restores muscle regenerative potential.
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Affiliation(s)
- Indranil Sinha
- Division of Plastic Surgery, Brigham and Women’s Hospital, Boston, MA, United States
- Harvard Medical School, Boston, MA, United States
- Harvard Stem Cell Institute, Cambridge, MA, United States
- *Correspondence: Indranil Sinha, ; Amy J. Wagers,
| | - Dharaniya Sakthivel
- Division of Plastic Surgery, Brigham and Women’s Hospital, Boston, MA, United States
- Harvard Medical School, Boston, MA, United States
| | - Benjamin A. Olenchock
- Harvard Medical School, Boston, MA, United States
- Division of Cardiovascular Medicine, Brigham and Women’s Hospital, Boston, MA, United States
| | - Carla R. Kruse
- Division of Plastic Surgery, Brigham and Women’s Hospital, Boston, MA, United States
- Harvard Medical School, Boston, MA, United States
| | - Jeremy Williams
- University of California San Francisco, San Francisco, CA, United States
| | - David E. Varon
- Division of Plastic Surgery, Brigham and Women’s Hospital, Boston, MA, United States
- Harvard Medical School, Boston, MA, United States
| | - Jessica D. Smith
- Division of Plastic Surgery, Brigham and Women’s Hospital, Boston, MA, United States
- Harvard Medical School, Boston, MA, United States
| | - Arin L. Madenci
- Division of Plastic Surgery, Brigham and Women’s Hospital, Boston, MA, United States
- Harvard Medical School, Boston, MA, United States
| | - Kristo Nuutila
- Division of Plastic Surgery, Brigham and Women’s Hospital, Boston, MA, United States
- Harvard Medical School, Boston, MA, United States
| | - Amy J. Wagers
- Harvard Medical School, Boston, MA, United States
- Harvard Stem Cell Institute, Cambridge, MA, United States
- Joslin Diabetes Center, Boston, MA, United States
- *Correspondence: Indranil Sinha, ; Amy J. Wagers,
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22
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Martin JR, Nelson CE, Gupta MK, Yu F, Sarett SM, Hocking KM, Pollins AC, Nanney LB, Davidson JM, Guelcher SA, Duvall CL. Local Delivery of PHD2 siRNA from ROS-Degradable Scaffolds to Promote Diabetic Wound Healing. Adv Healthc Mater 2016; 5:2751-2757. [PMID: 27717176 PMCID: PMC5152672 DOI: 10.1002/adhm.201600820] [Citation(s) in RCA: 59] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2016] [Indexed: 12/19/2022]
Abstract
Small interfering RNA (siRNA) delivered from reactive oxygen species-degradable tissue engineering scaffolds promotes diabetic wound healing in rats. Porous poly(thioketal-urethane) scaffolds implanted in diabetic wounds locally deliver siRNA that inhibits the expression of prolyl hydroxylase domain protein 2, thereby increasing the expression of progrowth genes and increasing vasculature, proliferating cells, and tissue development in diabetic wounds.
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Affiliation(s)
- John R. Martin
- Department of Biomedical Engineering, Vanderbilt University, Nashville, TN 37235, USA
| | - Christopher E. Nelson
- Department of Biomedical Engineering, Vanderbilt University, Nashville, TN 37235, USA
| | - Mukesh K. Gupta
- Department of Biomedical Engineering, Vanderbilt University, Nashville, TN 37235, USA
| | - Fang Yu
- Department of Pathology, Microbiology, and Immunology, Vanderbilt University Medical Center, Nashville, TN 37232, USA
| | - Samantha M. Sarett
- Department of Biomedical Engineering, Vanderbilt University, Nashville, TN 37235, USA
| | - Kyle M. Hocking
- Department of Biomedical Engineering, Vanderbilt University, Nashville, TN 37235, USA
| | - Alonda C. Pollins
- Department of Plastic Surgery, Vanderbilt University Medical Center, Nashville, TN 37232, USA
| | - Lillian B. Nanney
- Department of Plastic Surgery, Vanderbilt University Medical Center, Nashville, TN 37232, USA
| | - Jeffrey M. Davidson
- Department of Pathology, Microbiology, and Immunology, Vanderbilt University Medical Center, Nashville, TN 37232, USA. Medical Research Service, Veterans Affairs Tennessee Valley Healthcare System, Nashville, TN 37212, USA
| | - Scott A. Guelcher
- Department of Chemical and Biomolecular Engineering, Vanderbilt University, Nashville, TN 37235, USA
| | - Craig L. Duvall
- Department of Biomedical Engineering, Vanderbilt University, Nashville, TN 37235, USA
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23
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Xiao Y, Ahadian S, Radisic M. Biochemical and Biophysical Cues in Matrix Design for Chronic and Diabetic Wound Treatment. TISSUE ENGINEERING PART B-REVIEWS 2016; 23:9-26. [PMID: 27405960 DOI: 10.1089/ten.teb.2016.0200] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Progress in biomaterial science and engineering and increasing knowledge in cell biology have enabled us to develop functional biomaterials providing appropriate biochemical and biophysical cues for tissue regeneration applications. Tissue regeneration is particularly important to treat chronic wounds of people with diabetes. Understanding and controlling the cellular microenvironment of the wound tissue are important to improve the wound healing process. In this study, we review different biochemical (e.g., growth factors, peptides, DNA, and RNA) and biophysical (e.g., topographical guidance, pressure, electrical stimulation, and pulsed electromagnetic field) cues providing a functional and instructive acellular matrix to heal diabetic chronic wounds. The biochemical and biophysical signals generally regulate cell-matrix interactions and cell behavior and function inducing the tissue regeneration for chronic wounds. Some technologies and devices have already been developed and used in the clinic employing biochemical and biophysical cues for wound healing applications. These technologies can be integrated with smart biomaterials to deliver therapeutic agents to the wound tissue in a precise and controllable manner. This review provides useful guidance in understanding molecular mechanisms and signals in the healing of diabetic chronic wounds and in designing instructive biomaterials to treat them.
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Affiliation(s)
- Yun Xiao
- 1 Department of Chemical Engineering and Applied Chemistry, University of Toronto , Toronto, Ontario, Canada .,2 Institute of Biomaterials and Biomedical Engineering, University of Toronto , Toronto, Ontario, Canada
| | - Samad Ahadian
- 2 Institute of Biomaterials and Biomedical Engineering, University of Toronto , Toronto, Ontario, Canada
| | - Milica Radisic
- 1 Department of Chemical Engineering and Applied Chemistry, University of Toronto , Toronto, Ontario, Canada .,2 Institute of Biomaterials and Biomedical Engineering, University of Toronto , Toronto, Ontario, Canada
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Huang C, Qian SL, Sun LY, Cheng B. Light-Emitting Diode Irradiation (640 nm) Regulates Keratinocyte Migration and Cytoskeletal Reorganization Via Hypoxia-Inducible Factor-1α. Photomed Laser Surg 2016; 34:313-20. [PMID: 27244052 DOI: 10.1089/pho.2015.4077] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
OBJECTIVE The objective of this study was to determine the effect of light-emitting diode (LED) irradiation on the migration and proliferation of keratinocytes. BACKGROUND DATA Keratinocytes play a key role in re-epithelialization during wound healing; it is speculated that low-level LED therapy might improve keratinocyte migration and proliferation. MATERIALS AND METHODS Human keratinocyte cells (HKCs) were isolated from child or adult foreskins and irradiated with LED light with a wavelength of 640 nm and a dosage of 12 or 24 J/cm(2). Cell motility, migration, and proliferation were examined using live cell imaging, scratch assay, and a colorimetric cell counting assay, respectively. Hypoxia-inducible factor-1α (HIF-1α) protein levels were analyzed by using Western blotting. Filamentous actin (F-actin) was stained by phalloidin. YC-1 [3-(5-hydroxymethyl-2-furyl)-1-benzylindazole] was used as an HIF-1 inhibitor, and CoCl2 (cobalt chloride) and DMOG (dimethyloxaloyl glycine) are HIF-1α activators. RESULTS LED irradiation significantly promoted cell motility and migration, but did not significantly influence cell proliferation in HKCs. Furthermore, LED irradiation resulted in a reorganization of cellular F-actin and a dramatic upregulation of HIF-1α expression. Suppression of HIF-1α using the compound YC-1 prevented reorganization of the actin cytoskeleton following LED irradiation, suggesting that the effect of LED irradiation on the cytoskeleton is mediated through HIF-1α. Conversely, chemical activation of HIF-1α via DMOG or CoCl2 resulted in a reorganization of F-actin. CONCLUSIONS LED irradiation may increase keratinocyte migration via HIF-1α-dependent cytoskeletal reorganization.
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Affiliation(s)
- Chong Huang
- 1 The Second Military Medical University of People's Liberation Army , Shang Hai, P.R. China .,2 Department of Plastic Surgery, General Hospital of Guangzhou Military Command , PLA, Guangzhou, P.R. China
| | - Sheng Lin Qian
- 2 Department of Plastic Surgery, General Hospital of Guangzhou Military Command , PLA, Guangzhou, P.R. China
| | - Li Yue Sun
- 3 Department of Oncology, General Hospital of Guangzhou Military Command , PLA, Guangzhou, P.R. China
| | - Biao Cheng
- 2 Department of Plastic Surgery, General Hospital of Guangzhou Military Command , PLA, Guangzhou, P.R. China
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25
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Abstract
Oxygen represents one of the major molecules required for the development and maintenance of life. An adequate response to hypoxia is therefore required for the functioning of the majority of living organisms and relies on the activation of the hypoxia-inducible factor (HIF) pathway. HIF prolyl hydroxylase domain-2 (PHD2) has long been recognized as the major regulator of this response, controlling a myriad of outcomes that range from cell death to proliferation. However, this enzyme has been associated with more pathways, making the role of this protein remarkably complex under distinct pathologies. While a protective role seems to exist in physiological conditions such as erythropoiesis; the picture is more complex during pathologies such as cancer. Since the regulation of this enzyme and its closest family members is currently considered as a possible therapy for various diseases, understanding the different particular roles of this protein is essential.
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Affiliation(s)
- Ana M Meneses
- Heisenberg Research Group, Department of Clinical Pathobiochemistry, Institute for Clinical Chemistry and Laboratory Medicine, Technische Universität Dresden, Dresden, Germany
| | - Ben Wielockx
- Heisenberg Research Group, Department of Clinical Pathobiochemistry, Institute for Clinical Chemistry and Laboratory Medicine, Technische Universität Dresden, Dresden, Germany
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26
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Whittam AJ, Maan ZN, Duscher D, Wong VW, Barrera JA, Januszyk M, Gurtner GC. Challenges and Opportunities in Drug Delivery for Wound Healing. Adv Wound Care (New Rochelle) 2016; 5:79-88. [PMID: 26862465 DOI: 10.1089/wound.2014.0600] [Citation(s) in RCA: 77] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Significance: Chronic wounds remain a significant public health problem. Alterations in normal physiological processes caused by aging or diabetes lead to impaired tissue repair and the development of chronic and nonhealing wounds. Understanding the unique features of the wound environment will be required to develop new therapeutics that impact these disabling conditions. New drug-delivery systems (DDSs) may enhance current and future therapies for this challenging clinical problem. Recent Advances: Historically, physical barriers and biological degradation limited the efficacy of DDSs in wound healing. In aiming at improving and optimizing drug delivery, recent data suggest that combinations of delivery mechanisms, such as hydrogels, small molecules, RNA interference (RNAi), as well as growth factor and stem cell-based therapies (biologics), could offer exciting new opportunities for improving tissue repair. Critical Issues: The lack of effective therapeutic approaches to combat the significant disability associated with chronic wounds has become an area of increasing clinical concern. However, the unique challenges of the wound environment have limited the development of effective therapeutic options for clinical use. Future Directions: New platforms presented in this review may provide clinicians and scientists with an improved understanding of the alternatives for drug delivery in wound care, which may facilitate the development of new therapeutic approaches for patients.
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Affiliation(s)
- Alexander J. Whittam
- Division of Plastic and Reconstructive Surgery, Department of Surgery, Stanford University School of Medicine, Stanford, California
| | - Zeshaan N. Maan
- Division of Plastic and Reconstructive Surgery, Department of Surgery, Stanford University School of Medicine, Stanford, California
| | - Dominik Duscher
- Division of Plastic and Reconstructive Surgery, Department of Surgery, Stanford University School of Medicine, Stanford, California
| | - Victor W. Wong
- Department of Plastic Surgery, Johns Hopkins Medical Institutions, Baltimore, Maryland
| | - Janos A. Barrera
- Division of Plastic and Reconstructive Surgery, Department of Surgery, Stanford University School of Medicine, Stanford, California
| | - Michael Januszyk
- Division of Plastic and Reconstructive Surgery, Department of Surgery, Stanford University School of Medicine, Stanford, California
| | - Geoffrey C. Gurtner
- Division of Plastic and Reconstructive Surgery, Department of Surgery, Stanford University School of Medicine, Stanford, California
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27
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Pharmacological targeting of the HIF hydroxylases--A new field in medicine development. Mol Aspects Med 2016; 47-48:54-75. [PMID: 26791432 DOI: 10.1016/j.mam.2016.01.001] [Citation(s) in RCA: 110] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2015] [Revised: 12/11/2015] [Accepted: 01/04/2016] [Indexed: 12/13/2022]
Abstract
In human cells oxygen levels are 'sensed' by a set of ferrous iron and 2-oxoglutarate dependent dioxygenases. These enzymes regulate a broad range of cellular and systemic responses to hypoxia by catalysing the post-translational hydroxylation of specific residues in the alpha subunits of hypoxia inducible factor (HIF) transcriptional complexes. The HIF hydroxylases are now the subject of pharmaceutical targeting by small molecule inhibitors that aim to activate or augment the endogenous HIF transcriptional response for the treatment of anaemia and other hypoxic human diseases. Here we consider the rationale for this therapeutic strategy from the biochemical, biological and medical perspectives. We outline structural and mechanistic considerations that are relevant to the design of HIF hydroxylase inhibitors, including likely determinants of specificity, and review published reports on their activity in pre-clinical models and clinical trials.
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28
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Catrina SB, Zheng X. Disturbed hypoxic responses as a pathogenic mechanism of diabetic foot ulcers. Diabetes Metab Res Rev 2016; 32 Suppl 1:179-85. [PMID: 26453314 DOI: 10.1002/dmrr.2742] [Citation(s) in RCA: 87] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/19/2015] [Revised: 07/15/2015] [Accepted: 09/20/2015] [Indexed: 12/24/2022]
Abstract
Diabetic foot ulceration (DFU) is a chronic complication of diabetes that is characterized by impaired wound healing in the lower extremities. DFU remains a major clinical challenge because of poor understanding of its pathogenic mechanisms. Impaired wound healing in diabetes is characterized by decreased angiogenesis, reduced bone marrow-derived endothelial progenitor cell (EPC) recruitment, and decreased fibroblast and keratinocyte proliferation and migration. Recently, increasing evidence has suggested that increased hypoxic conditions and impaired cellular responses to hypoxia are essential pathogenic factors of delayed wound healing in DFU. Hypoxia-inducible factor-1 (HIF-1, a heterodimer of HIF-1α and HIF-1β) is a master regulator of oxygen homeostasis that mediates the adaptive cellular responses to hypoxia by regulating the expression of genes involved in angiogenesis, metabolic changes, proliferation, migration, and cell survival. However, HIF-1 signalling is inhibited in diabetes as a result of hyperglycaemia-induced HIF-1α destabilization and functional repression. Increasing HIF-1α expression and activity using various approaches promotes angiogenesis, EPC recruitment, and granulation, thereby improving wound healing in experimental diabetes. The mechanisms underlying HIF-1α regulation in diabetes and the therapeutic strategies targeting HIF-1 signalling for the treatment of diabetic wounds are discussed in this review. Further investigations of the pathways involved in HIF-1α regulation in diabetes are required to advance our understanding of the mechanisms underlying impaired wound healing in diabetes and to provide a foundation for developing novel therapeutic approaches to treat DFU.
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Affiliation(s)
- Sergiu-Bogdan Catrina
- Department of Molecular Medicine and Surgery, Karolinska Institutet, Stockholm, Sweden
| | - Xiaowei Zheng
- Department of Molecular Medicine and Surgery, Karolinska Institutet, Stockholm, Sweden
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29
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Sarett SM, Nelson CE, Duvall CL. Technologies for controlled, local delivery of siRNA. J Control Release 2015; 218:94-113. [PMID: 26476177 PMCID: PMC4665980 DOI: 10.1016/j.jconrel.2015.09.066] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2015] [Revised: 09/25/2015] [Accepted: 09/29/2015] [Indexed: 12/24/2022]
Abstract
The discovery of RNAi in the late 1990s unlocked a new realm of therapeutic possibilities by enabling potent and specific silencing of theoretically any desired genetic target. Better elucidation of the mechanism of action, the impact of chemical modifications that stabilize and reduce nonspecific effects of siRNA molecules, and the key design considerations for effective delivery systems has spurred progress toward developing clinically-successful siRNA therapies. A logical aim for initial siRNA translation is local therapies, as delivering siRNA directly to its site of action helps to ensure that a sufficient dose reaches the target tissue, lessens the potential for off-target side effects, and circumvents the substantial systemic delivery barriers. While locally injected or topically applied siRNA has progressed into numerous clinical trials, an enormous opportunity exists to develop sustained-release, local delivery systems that enable both spatial and temporal control of gene silencing. This review focuses on material platforms that establish both localized and controlled gene silencing, with emphasis on the systems that show most promise for clinical translation.
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Affiliation(s)
- Samantha M Sarett
- Vanderbilt University Department of Biomedical Engineering, United States
| | | | - Craig L Duvall
- Vanderbilt University Department of Biomedical Engineering, United States.
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30
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Zgheib C, Xu J, Mallette AC, Caskey RC, Zhang L, Hu J, Liechty KW. SCF increases in utero-labeled stem cells migration and improves wound healing. Wound Repair Regen 2015; 23:583-90. [PMID: 26032674 DOI: 10.1111/wrr.12318] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2015] [Accepted: 05/27/2015] [Indexed: 12/17/2022]
Abstract
Diabetic skin wounds lack the ability to heal properly and constitute a major and significant complication of diabetes. Nontraumatic lower extremity amputations are the number one complication of diabetic skin wounds. The complexity of their pathophysiology requires an intervention at many levels to enhance healing and wound closure. Stem cells are a promising treatment for diabetic skin wounds as they have the ability to correct abnormal healing. Stem cell factor (SCF), a chemokine expressed in the skin, can induce stem cells migration, however the role of SCF in diabetic skin wound healing is still unknown. We hypothesize that SCF would correct the impairment and promote the healing of diabetic skin wounds. Our results show that SCF improved wound closure in diabetic mice and increased HIF-1α and vascular endothelial growth factor (VEGF) expression levels in these wounds. SCF treatment also enhanced the migration of red fluorescent protein (RFP)-labeled skin stem cells via in utero intra-amniotic injection of lenti-RFP at E8. Interestingly these RFP+ cells are present in the epidermis, stain negative for K15, and appear to be distinct from the already known hair follicle stem cells. These results demonstrate that SCF improves diabetic wound healing in part by increasing the recruitment of a unique stem cell population present in the skin.
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Affiliation(s)
- Carlos Zgheib
- Laboratory for Fetal and Regenerative Biology, Department of Surgery, University of Colorado Denver, Anschutz Medical Campus and Children's Hospital Colorado, Aurora, Colorado
| | - Junwang Xu
- Laboratory for Fetal and Regenerative Biology, Department of Surgery, University of Colorado Denver, Anschutz Medical Campus and Children's Hospital Colorado, Aurora, Colorado
| | | | - Robert C Caskey
- University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania
| | - Liping Zhang
- University of Mississippi Medical Center, Jackson, Mississippi
| | - Junyi Hu
- Laboratory for Fetal and Regenerative Biology, Department of Surgery, University of Colorado Denver, Anschutz Medical Campus and Children's Hospital Colorado, Aurora, Colorado
| | - Kenneth W Liechty
- Laboratory for Fetal and Regenerative Biology, Department of Surgery, University of Colorado Denver, Anschutz Medical Campus and Children's Hospital Colorado, Aurora, Colorado
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31
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Lorden ER, Levinson HM, Leong KW. Integration of drug, protein, and gene delivery systems with regenerative medicine. Drug Deliv Transl Res 2015; 5:168-86. [PMID: 25787742 PMCID: PMC4382089 DOI: 10.1007/s13346-013-0165-8] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Regenerative medicine has the potential to drastically change the field of health care from reactive to preventative and restorative. Exciting advances in stem cell biology and cellular reprogramming have fueled the progress of this field. Biochemical cues in the form of small molecule drugs, growth factors, zinc finger protein transcription factors and nucleases, transcription activator-like effector nucleases, monoclonal antibodies, plasmid DNA, aptamers, or RNA interference agents can play an important role to influence stem cell differentiation and the outcome of tissue regeneration. Many of these biochemical factors are fragile and must act intracellularly at the molecular level. They require an effective delivery system, which can take the form of a scaffold (e.g., hydrogels and electrospun fibers), carrier (viral and nonviral), nano- and microparticle, or genetically modified cell. In this review, we will discuss the history and current technologies of drug, protein, and gene delivery in the context of regenerative medicine. Next, we will present case examples of how delivery technologies are being applied to promote angiogenesis in nonhealing wounds or prevent angiogenesis in age related macular degeneration. Finally, we will conclude with a brief discussion of the regulatory pathway from bench to bedside for the clinical translation of these novel therapeutics.
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Affiliation(s)
| | - Howard M. Levinson
- Division of Plastic and Reconstructive Surgery, Department of Surgery, Duke University Medical Center, Durham, NC, USA
| | - Kam W. Leong
- Department of Biomedical Engineering, Duke University, Durham, NC, USA
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32
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Harnoss JM, Strowitzki MJ, Radhakrishnan P, Platzer LK, Harnoss JC, Hank T, Cai J, Ulrich A, Schneider M. Therapeutic inhibition of prolyl hydroxylase domain-containing enzymes in surgery: putative applications and challenges. HYPOXIA 2015; 3:1-14. [PMID: 27774478 PMCID: PMC5045068 DOI: 10.2147/hp.s60872] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Oxygen is essential for metazoans to generate energy. Upon oxygen deprivation adaptive and protective pathways are induced, mediated by hypoxia-inducible factors (HIFs) and prolyl hydroxylase domain-containing enzymes (PHDs). Both play a pivotal role in various conditions associated with prolonged ischemia and inflammation, and are promising targets for therapeutic intervention. This review focuses on aspects of therapeutic PHD modulation in surgically relevant disease conditions such as hepatic and intestinal disorders, wound healing, innate immune responses, and tumorigenesis, and discusses the therapeutic potential and challenges of PHD inhibition in surgical patients.
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Affiliation(s)
- Jonathan Michael Harnoss
- Department of General, Visceral and Transplantation Surgery, University of Heidelberg, Heidelberg, Germany
| | - Moritz Johannes Strowitzki
- Department of General, Visceral and Transplantation Surgery, University of Heidelberg, Heidelberg, Germany
| | - Praveen Radhakrishnan
- Department of General, Visceral and Transplantation Surgery, University of Heidelberg, Heidelberg, Germany
| | - Lisa Katharina Platzer
- Department of General, Visceral and Transplantation Surgery, University of Heidelberg, Heidelberg, Germany
| | - Julian Camill Harnoss
- Department of General, Visceral and Transplantation Surgery, University of Heidelberg, Heidelberg, Germany
| | - Thomas Hank
- Department of General, Visceral and Transplantation Surgery, University of Heidelberg, Heidelberg, Germany
| | - Jun Cai
- Department of General, Visceral and Transplantation Surgery, University of Heidelberg, Heidelberg, Germany
| | - Alexis Ulrich
- Department of General, Visceral and Transplantation Surgery, University of Heidelberg, Heidelberg, Germany
| | - Martin Schneider
- Department of General, Visceral and Transplantation Surgery, University of Heidelberg, Heidelberg, Germany
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33
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Zielins ER, Atashroo DA, Maan ZN, Duscher D, Walmsley GG, Hu M, Senarath-Yapa K, McArdle A, Tevlin R, Wearda T, Paik KJ, Duldulao C, Hong WX, Gurtner GC, Longaker MT. Wound healing: an update. Regen Med 2014; 9:817-30. [DOI: 10.2217/rme.14.54] [Citation(s) in RCA: 66] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Wounds, both chronic and acute, continue to be a tremendous socioeconomic burden. As such, technologies drawn from many disciplines within science and engineering are constantly being incorporated into innovative wound healing therapies. While many of these therapies are experimental, they have resulted in new insights into the pathophysiology of wound healing, and in turn the development of more specialized treatments for both normal and abnormal wound healing states. Herein, we review some of the emerging technologies that are currently being developed to aid and improve wound healing after cutaneous injury.
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Affiliation(s)
- Elizabeth R Zielins
- Hagey Laboratory for Pediatric Regenerative Medicine, Department of Surgery, Division of Plastic Surgery, Stanford University School of Medicine, 257 Campus Drive, Stanford, CA 94305–5148, USA
| | - David A Atashroo
- Hagey Laboratory for Pediatric Regenerative Medicine, Department of Surgery, Division of Plastic Surgery, Stanford University School of Medicine, 257 Campus Drive, Stanford, CA 94305–5148, USA
| | - Zeshaan N Maan
- Hagey Laboratory for Pediatric Regenerative Medicine, Department of Surgery, Division of Plastic Surgery, Stanford University School of Medicine, 257 Campus Drive, Stanford, CA 94305–5148, USA
| | - Dominik Duscher
- Hagey Laboratory for Pediatric Regenerative Medicine, Department of Surgery, Division of Plastic Surgery, Stanford University School of Medicine, 257 Campus Drive, Stanford, CA 94305–5148, USA
| | - Graham G Walmsley
- Hagey Laboratory for Pediatric Regenerative Medicine, Department of Surgery, Division of Plastic Surgery, Stanford University School of Medicine, 257 Campus Drive, Stanford, CA 94305–5148, USA
| | - Michael Hu
- Hagey Laboratory for Pediatric Regenerative Medicine, Department of Surgery, Division of Plastic Surgery, Stanford University School of Medicine, 257 Campus Drive, Stanford, CA 94305–5148, USA
- Department of Surgery, John A Burns School of Medicine, University of Hawai'i, Honolulu, HI
| | - Kshemendra Senarath-Yapa
- Hagey Laboratory for Pediatric Regenerative Medicine, Department of Surgery, Division of Plastic Surgery, Stanford University School of Medicine, 257 Campus Drive, Stanford, CA 94305–5148, USA
| | - Adrian McArdle
- Hagey Laboratory for Pediatric Regenerative Medicine, Department of Surgery, Division of Plastic Surgery, Stanford University School of Medicine, 257 Campus Drive, Stanford, CA 94305–5148, USA
| | - Ruth Tevlin
- Hagey Laboratory for Pediatric Regenerative Medicine, Department of Surgery, Division of Plastic Surgery, Stanford University School of Medicine, 257 Campus Drive, Stanford, CA 94305–5148, USA
| | - Taylor Wearda
- Hagey Laboratory for Pediatric Regenerative Medicine, Department of Surgery, Division of Plastic Surgery, Stanford University School of Medicine, 257 Campus Drive, Stanford, CA 94305–5148, USA
| | - Kevin J Paik
- Hagey Laboratory for Pediatric Regenerative Medicine, Department of Surgery, Division of Plastic Surgery, Stanford University School of Medicine, 257 Campus Drive, Stanford, CA 94305–5148, USA
| | - Christopher Duldulao
- Hagey Laboratory for Pediatric Regenerative Medicine, Department of Surgery, Division of Plastic Surgery, Stanford University School of Medicine, 257 Campus Drive, Stanford, CA 94305–5148, USA
| | - Wan Xing Hong
- Hagey Laboratory for Pediatric Regenerative Medicine, Department of Surgery, Division of Plastic Surgery, Stanford University School of Medicine, 257 Campus Drive, Stanford, CA 94305–5148, USA
- University of Central Florida College of Medicine, Orlando, FL, USA
| | - Geoffrey C Gurtner
- Hagey Laboratory for Pediatric Regenerative Medicine, Department of Surgery, Division of Plastic Surgery, Stanford University School of Medicine, 257 Campus Drive, Stanford, CA 94305–5148, USA
| | - Michael T Longaker
- Hagey Laboratory for Pediatric Regenerative Medicine, Department of Surgery, Division of Plastic Surgery, Stanford University School of Medicine, 257 Campus Drive, Stanford, CA 94305–5148, USA
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Maan ZN, Rodrigues M, Rennert RC, Whitmore A, Duscher D, Januszyk M, Hu M, Whittam AJ, Davis CR, Gurtner GC. Understanding regulatory pathways of neovascularization in diabetes. Expert Rev Endocrinol Metab 2014; 9:487-501. [PMID: 30736211 DOI: 10.1586/17446651.2014.938054] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Diabetes mellitus and its associated comorbidities represent a significant health burden worldwide. Vascular dysfunction is the major contributory factor in the development of these comorbidities, which include impaired wound healing, cardiovascular disease and proliferative diabetic retinopathy. While the etiology of abnormal neovascularization in diabetes is complex and paradoxical, the dysregulation of the varied processes contributing to the vascular response are due in large part to the effects of hyperglycemia. In this review, we explore the mechanisms by which hyperglycemia disrupts chemokine expression and function, including the critical hypoxia inducible factor-1 axis. We place particular emphasis on the therapeutic potential of strategies addressing these pathways; as such targeted approaches may one day help alleviate the healthcare burden of diabetic sequelae.
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Affiliation(s)
- Zeshaan N Maan
- a Department of Surgery, Stanford University School of Medicine, 257 Campus Drive West, Hagey Building GK-201, Stanford, CA 94305-5148, USA
| | - Melanie Rodrigues
- a Department of Surgery, Stanford University School of Medicine, 257 Campus Drive West, Hagey Building GK-201, Stanford, CA 94305-5148, USA
| | - Robert C Rennert
- a Department of Surgery, Stanford University School of Medicine, 257 Campus Drive West, Hagey Building GK-201, Stanford, CA 94305-5148, USA
| | - Arnetha Whitmore
- a Department of Surgery, Stanford University School of Medicine, 257 Campus Drive West, Hagey Building GK-201, Stanford, CA 94305-5148, USA
| | - Dominik Duscher
- a Department of Surgery, Stanford University School of Medicine, 257 Campus Drive West, Hagey Building GK-201, Stanford, CA 94305-5148, USA
| | - Michael Januszyk
- a Department of Surgery, Stanford University School of Medicine, 257 Campus Drive West, Hagey Building GK-201, Stanford, CA 94305-5148, USA
| | - Michael Hu
- a Department of Surgery, Stanford University School of Medicine, 257 Campus Drive West, Hagey Building GK-201, Stanford, CA 94305-5148, USA
| | - Alexander J Whittam
- a Department of Surgery, Stanford University School of Medicine, 257 Campus Drive West, Hagey Building GK-201, Stanford, CA 94305-5148, USA
| | - Christopher R Davis
- a Department of Surgery, Stanford University School of Medicine, 257 Campus Drive West, Hagey Building GK-201, Stanford, CA 94305-5148, USA
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35
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Haertel E, Werner S, Schäfer M. Transcriptional regulation of wound inflammation. Semin Immunol 2014; 26:321-8. [DOI: 10.1016/j.smim.2014.01.005] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/08/2014] [Accepted: 01/18/2014] [Indexed: 12/23/2022]
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36
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Catrina SB. Impaired hypoxia-inducible factor (HIF) regulation by hyperglycemia. J Mol Med (Berl) 2014; 92:1025-34. [PMID: 25027070 DOI: 10.1007/s00109-014-1166-x] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2013] [Revised: 05/06/2014] [Accepted: 05/08/2014] [Indexed: 12/13/2022]
Abstract
The mechanisms that contribute to the development of diabetes complications remain unclear. A defective reaction of tissues to hypoxia has recently emerged as a new pathogenic mechanism and consists of a complex repression of hypoxia-inducible factor (HIF), which is the main regulator of the adaptive response to hypoxia. This paper discusses the mechanisms by which hyperglycaemia contributes to HIF repression in diabetes. Furthermore, a comprehensive analysis of the functional relevance of these new findings to the development of chronic diabetes complications is provided, along with examples from animal models and clinics.
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Affiliation(s)
- Sergiu-Bogdan Catrina
- Department of Molecular Medicine and Surgery, Karolinska Institutet, Rolf Luft Research Center for Diabetes and Endocrinology, Karolinska University Hospital, L1:01, 17176, Stockholm, Sweden,
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Nelson CE, Kim AJ, Adolph EJ, Gupta MK, Yu F, Hocking KM, Davidson JM, Guelcher SA, Duvall CL. Tunable delivery of siRNA from a biodegradable scaffold to promote angiogenesis in vivo. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2014; 26:607-14, 506. [PMID: 24338842 PMCID: PMC3951880 DOI: 10.1002/adma.201303520] [Citation(s) in RCA: 89] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2013] [Revised: 10/14/2013] [Indexed: 05/17/2023]
Abstract
A system has been engineered for temporally controlled delivery of siRNA from biodegradable tissue regenerative scaffolds. Therapeutic application of this approach to silence prolyl hydroxylase domain 2 promoted expression of pro-angiogenic genes controlled by HIF1α and enhanced scaffold vascularization in vivo. This technology provides a new standard for efficient and controllable gene silencing to modulate host response within regenerative biomaterials.
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Affiliation(s)
- Christopher E. Nelson
- Biomedical Engineering – Vanderbilt University, VU Station B, Box 351631, Nashville TN 37235
| | - Arnold J. Kim
- Biomedical Engineering – Vanderbilt University, VU Station B, Box 351631, Nashville TN 37235
| | - Elizabeth J. Adolph
- Chemical and Biomolecular Engineering – Vanderbilt University, Nashville TN 37235
| | - Mukesh K. Gupta
- Biomedical Engineering – Vanderbilt University, VU Station B, Box 351631, Nashville TN 37235
| | - Fang Yu
- Department of Pathology – Vanderbilt University, Nashville TN 37235
| | - Kyle M. Hocking
- Biomedical Engineering – Vanderbilt University, VU Station B, Box 351631, Nashville TN 37235
| | | | - Scott A. Guelcher
- Chemical and Biomolecular Engineering – Vanderbilt University, Nashville TN 37235
| | - Craig L. Duvall
- Biomedical Engineering – Vanderbilt University, VU Station B, Box 351631, Nashville TN 37235
- Prof. C.L. Duvall, Vanderbilt University, VU Station B, Box 351631, Nashville, TN, 37235, USA,
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Perez-Aso M, Chiriboga L, Cronstein BN. Pharmacological blockade of adenosine A2A receptors diminishes scarring. FASEB J 2012; 26:4254-63. [PMID: 22767233 DOI: 10.1096/fj.12-209627] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Adenosine A2A receptor (A2AR) stimulation promotes wound healing and is required for the development of fibrosis in murine models of scleroderma and cirrhosis. Nonetheless, the role of A2AR in the formation of scars following skin trauma has not been explored. Here, we examined the effect of pharmacological blockade of A2AR, with the selective adenosine A2AR-antagonist ZM241385 (2.5 mg/ml), in a murine model of scarring that mimics human scarring. We found that application of the selective adenosine A2AR antagonist ZM241385 decreased scar size and enhanced the tensile strength of the scar. Within the scar itself, collagen alignment and composition (marked reduction in collagen 3), but not periostin, biglycan, or fibronectin accumulation, was improved by application of ZM241385. Moreover, A2AR blockade reduced the number of myofibroblasts and angiogenesis but not macrophage infiltration in the scar. Taken together, our work strongly suggests that pharmacological A2AR blockade can be used to diminish scarring while improving the collagen composition and tensile strength of the healed wound.
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Affiliation(s)
- Miguel Perez-Aso
- Division of Translational Medicine, Department of Medicine, New York University School of Medicine, 550 First Ave., MSB255, New York, NY 10016, USA
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