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Deferoxamine Treatment Improves Antioxidant Cosmeceutical Formulation Protection against Cutaneous Diesel Engine Exhaust Exposure. Antioxidants (Basel) 2021; 10:antiox10121928. [PMID: 34943031 PMCID: PMC8750544 DOI: 10.3390/antiox10121928] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2021] [Revised: 11/25/2021] [Accepted: 11/26/2021] [Indexed: 12/25/2022] Open
Abstract
Skin is one of the main targets of the outdoor stressors. Considering that pollution levels are rising progressively, it is not surprising that several cutaneous conditions have been associated with its exposure. Among the pollutants, diesel engine exhaust (DEE) represents one of the most toxic, as it is composed of a mixture of many different noxious chemicals generated during the compression cycle, for ignition rather than an electrical spark as in gasoline engines. The toxic chemicals of most concern in DEE, besides the oxides of nitrogen, sulfur dioxide and various hydrocarbons, are metals that can induce oxidative stress and inflammation. The present study aimed to evaluate the effects of topical application, singularly or in combination, of the iron-chelator deferoxamine and a commercially available formulation, CE Ferulic, in up to 4-day DEE-exposed skin. DEE induced a significant increase in the oxidative marker 4-hydroxy-nonenal (4HNE) and matrix-metallopeptidase-9 (MMP-9), the loss of cutaneous-barrier-associated proteins (filaggrin and involucrin) and a decrease in collagen-1, while the formulations prevented the cutaneous damage in an additive manner. In conclusion, this study suggests that iron plays a key role in DEE-induced skin damage and its chelation could be an adjuvant strategy to reinforce antioxidant topical formulations.
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52
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Wu C, Shen L, Lu Y, Hu C, Liang Z, Long L, Ning N, Chen J, Guo Y, Yang Z, Hu X, Zhang J, Wang Y. Intrinsic Antibacterial and Conductive Hydrogels Based on the Distinct Bactericidal Effect of Polyaniline for Infected Chronic Wound Healing. ACS APPLIED MATERIALS & INTERFACES 2021; 13:52308-52320. [PMID: 34709801 DOI: 10.1021/acsami.1c14088] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Most chronic wounds suffer from infections, and their treatment is challenging. The usage of antibiotics may lead to bacterial resistance and adverse side effects. Positively charged substances have shown promise, but their applications are usually limited by certain cytotoxicity or complex synthesis. Doped polyaniline that carries a high density of positive charges would be a promising candidate due to its good biocompatibility and easy availability, but its interaction with bacteria has not been elucidated. Herein, the distinct bactericidal effect of polyaniline against Gram-positive bacteria has been verified. The antibacterial activity may result from the specific interaction with lipoteichoic acid to destroy the Gram-positive bacterial cell wall. Polyaniline and a macromolecular dopant (sulfonated hyaluronic acid) are used to construct a flexible hydrogel with skin-mimic electrical conductivity. The in vivo results demonstrate that electrical stimulation (ES) through this hydrogel is superior to ES via separated electrodes (the ES strategy used clinically) for promoting infected chronic wound healing.
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Affiliation(s)
- Can Wu
- National Engineering Research Center for Biomaterials, Sichuan University, Chengdu, Sichuan 610065, China
| | - Lu Shen
- National Engineering Research Center for Biomaterials, Sichuan University, Chengdu, Sichuan 610065, China
| | - Yuhui Lu
- National Engineering Research Center for Biomaterials, Sichuan University, Chengdu, Sichuan 610065, China
| | - Cheng Hu
- National Engineering Research Center for Biomaterials, Sichuan University, Chengdu, Sichuan 610065, China
| | - Zhen Liang
- National Engineering Research Center for Biomaterials, Sichuan University, Chengdu, Sichuan 610065, China
| | - Linyu Long
- National Engineering Research Center for Biomaterials, Sichuan University, Chengdu, Sichuan 610065, China
| | - Ning Ning
- Department of Orthopaedics, West China Hospital of Sichuan University, Chengdu, Sichuan 610041, China
| | - Jiali Chen
- Department of Orthopaedics, West China Hospital of Sichuan University, Chengdu, Sichuan 610041, China
| | - Yi Guo
- Rotex Co., Ltd., Chengdu, Sichuan 610043, China
| | - Zeyu Yang
- Rotex Co., Ltd., Chengdu, Sichuan 610043, China
| | - Xuefeng Hu
- National Engineering Research Center for Biomaterials, Sichuan University, Chengdu, Sichuan 610065, China
| | - Jieyu Zhang
- National Engineering Research Center for Biomaterials, Sichuan University, Chengdu, Sichuan 610065, China
| | - Yunbing Wang
- National Engineering Research Center for Biomaterials, Sichuan University, Chengdu, Sichuan 610065, China
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53
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Lavin CV, Abbas DB, Fahy EJ, Lee DK, Griffin M, Diaz Deleon NM, Mascharak S, Chen K, Momeni A, Gurtner GC, Longaker MT, Wan DC. A comparative analysis of deferoxamine treatment modalities for dermal radiation-induced fibrosis. J Cell Mol Med 2021; 25:10028-10038. [PMID: 34612609 PMCID: PMC8572785 DOI: 10.1111/jcmm.16913] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2021] [Revised: 07/24/2021] [Accepted: 08/20/2021] [Indexed: 12/18/2022] Open
Abstract
The iron chelator, deferoxamine (DFO), has been shown to potentially improve dermal radiation‐induced fibrosis (RIF) in mice through increased angiogenesis and reduced oxidative damage. This preclinical study evaluated the efficacy of two DFO administration modalities, transdermal delivery and direct injection, as well as temporal treatment strategies in relation to radiation therapy to address collateral soft tissue fibrosis. The dorsum of CD‐1 nude mice received 30 Gy radiation, and DFO (3 mg) was administered daily via patch or injection. Treatment regimens were prophylactic, during acute recovery, post‐recovery, or continuously throughout the experiment (n = 5 per condition). Measures included ROS‐detection, histology, biomechanics and vascularity changes. Compared with irradiated control skin, DFO treatment decreased oxidative damage, dermal thickness and collagen content, and increased skin elasticity and vascularity. Metrics of improvement in irradiated skin were most pronounced with continuous transdermal delivery of DFO. In summary, DFO administration reduces dermal fibrosis induced by radiation. Although both treatment modalities were efficacious, the transdermal delivery showed greater effect than injection for each temporal treatment strategy. Interestingly, the continuous patch group was more similar to normal skin than to irradiated control skin by most measures, highlighting a promising approach to address detrimental collateral soft tissue injury following radiation therapy.
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Affiliation(s)
- Christopher V Lavin
- Hagey Laboratory for Pediatric Regenerative Medicine, Stanford University School of Medicine, Stanford, CA, USA
| | - Darren B Abbas
- Hagey Laboratory for Pediatric Regenerative Medicine, Stanford University School of Medicine, Stanford, CA, USA
| | - Evan J Fahy
- Hagey Laboratory for Pediatric Regenerative Medicine, Stanford University School of Medicine, Stanford, CA, USA
| | - Daniel K Lee
- Hagey Laboratory for Pediatric Regenerative Medicine, Stanford University School of Medicine, Stanford, CA, USA
| | - Michelle Griffin
- Hagey Laboratory for Pediatric Regenerative Medicine, Stanford University School of Medicine, Stanford, CA, USA
| | - Nestor M Diaz Deleon
- Hagey Laboratory for Pediatric Regenerative Medicine, Stanford University School of Medicine, Stanford, CA, USA
| | - Shamik Mascharak
- Hagey Laboratory for Pediatric Regenerative Medicine, Stanford University School of Medicine, Stanford, CA, USA
| | - Kellen Chen
- Hagey Laboratory for Pediatric Regenerative Medicine, Stanford University School of Medicine, Stanford, CA, USA
| | - Arash Momeni
- Hagey Laboratory for Pediatric Regenerative Medicine, Stanford University School of Medicine, Stanford, CA, USA
| | - Geoffrey C Gurtner
- Hagey Laboratory for Pediatric Regenerative Medicine, Stanford University School of Medicine, Stanford, CA, USA
| | - Michael T Longaker
- Hagey Laboratory for Pediatric Regenerative Medicine, Stanford University School of Medicine, Stanford, CA, USA.,Institute for Stem Cell Biology and Regenerative Medicine, Stanford University Medical Center, Stanford, CA, USA
| | - Derrick C Wan
- Hagey Laboratory for Pediatric Regenerative Medicine, Stanford University School of Medicine, Stanford, CA, USA
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54
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Matoori S, Veves A, Mooney DJ. Advanced bandages for diabetic wound healing. Sci Transl Med 2021; 13:13/585/eabe4839. [PMID: 33731435 DOI: 10.1126/scitranslmed.abe4839] [Citation(s) in RCA: 165] [Impact Index Per Article: 55.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2020] [Accepted: 02/25/2021] [Indexed: 12/13/2022]
Abstract
Current treatment options for foot ulcers, a serious and prevalent complication of diabetes, remain nonspecific. In this Perspective, we present recent advances in understanding the pathophysiology of diabetic wound healing and the emergence of previously unidentified targets. We discuss wound dressings tailored to the diabetic wound environment currently under development.
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Affiliation(s)
- Simon Matoori
- John A. Paulson School of Engineering and Applied Sciences and Wyss Institute for Biologically Inspired Engineering, Harvard University, Cambridge, MA 02138, USA
| | - Aristidis Veves
- Joslin-Beth Israel Deaconess Foot Center and The Rongxiang Xu, MD, Center for Regenerative Therapeutics, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, MA 02115, USA.
| | - David J Mooney
- John A. Paulson School of Engineering and Applied Sciences and Wyss Institute for Biologically Inspired Engineering, Harvard University, Cambridge, MA 02138, USA.
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55
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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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Kesarwani A, Nagpal PS, Chhabra H. Experimental animal modelling for pressure injury: A systematic review. J Clin Orthop Trauma 2021; 17:273-279. [PMID: 33987077 PMCID: PMC8082114 DOI: 10.1016/j.jcot.2021.04.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/17/2020] [Revised: 03/23/2021] [Accepted: 04/02/2021] [Indexed: 01/02/2023] Open
Abstract
INTRODUCTION Pressure injury (PI) is a potentially serious condition that is often a consequence of other medical illnesses. It remains a challenge for the clinicians and the researcher to fully understand and develop a technique for comprehending pathogenicity, prevention and treatment. Several animal models have been created to understand the multifaceted cellular and biochemical processes of PI. There are numerous known intrinsic and extrinsic factors influencing the recovery of PI. Some of the important factors are friction, spinal cord injury, diabetes, nutrition, aging, infection, medication, obesity and vascular diseases. The dearth of optimal, pre-clinical animal models capable of mimicking the human PI remains a major challenge for its cure. An ideal animal model must endeavour the reproducibility, clinical significance, and most importantly effective translation into clinical use. METHODS In this current systematic review, a methodological literature review was conducted on the PRISMA guidelines. PubMed/Medline, Research Scholar and Science Direct databases were searched. We conferred the animal models like mice, rats, pigs and dogs used in the PI experiments between January 1980 to January 2021. Typically, methods like Ischemia-reperfusion (IR), monoplegia pressure sore and mechanical non-invasive have been discussed. These were used to generate pressure injuries in small and large animal models. RESULTS AND CONCLUSION Different animal models (mouse, rat, pig, dog) were evaluated based on ease of handling, availability for research, their size, skin type and the technical skills required. Studies suggest that mice and rats are the best-suited animals as their skin healing by contraction resembles the skin healing in humans. In most of the studies with mice and rats, the time taken for the recovery was between 1 and 3 weeks. Further, various techniques discussed in the current systematics review, supports the statement that the Ischemia-reperfusion (IR) method is the most suited method to study pressure injury. It is a controlled method that can develop different stages of PI and does not require any specialized setup for the application.
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Affiliation(s)
- Ashwani Kesarwani
- Department of Basic Research, Indian Spinal Injuries Centre, New Delhi, India
| | - Puja S. Nagpal
- Department of Basic Research, Indian Spinal Injuries Centre, New Delhi, India
| | - H.S. Chhabra
- Medical Director and Chief of Spine Unit, Indian Spinal Injuries Centre, New Delhi, India
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57
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Mechanical and Immunological Regulation in Wound Healing and Skin Reconstruction. Int J Mol Sci 2021; 22:ijms22115474. [PMID: 34067386 PMCID: PMC8197020 DOI: 10.3390/ijms22115474] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2021] [Revised: 05/07/2021] [Accepted: 05/19/2021] [Indexed: 12/17/2022] Open
Abstract
In the past decade, a new frontier in scarless wound healing has arisen because of significant advances in the field of wound healing realised by incorporating emerging concepts from mechanobiology and immunology. The complete integumentary organ system (IOS) regeneration and scarless wound healing mechanism, which occurs in specific species, body sites and developmental stages, clearly shows that mechanical stress signals and immune responses play important roles in determining the wound healing mode. Advances in tissue engineering technology have led to the production of novel human skin equivalents and organoids that reproduce cell–cell interactions with tissue-scale tensional homeostasis, and enable us to evaluate skin tissue morphology, functionality, drug response and wound healing. This breakthrough in tissue engineering has the potential to accelerate the understanding of wound healing control mechanisms through complex mechanobiological and immunological interactions. In this review, we present an overview of recent studies of biomechanical and immunological wound healing and tissue remodelling mechanisms through comparisons of species- and developmental stage-dependent wound healing mechanisms. We also discuss the possibility of elucidating the control mechanism of wound healing involving mechanobiological and immunological interaction by using next-generation human skin equivalents.
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Abstract
Hypoxia-inducible factors (HIFs) are the key regulators of oxygen homeostasis in response to hypoxia. In diabetes, multiple tissues are hypoxic but adaptive responses to hypoxia are impaired due to insufficient activation of HIF signalling, which results from inhibition of HIF-1α stability and function due to hyperglycaemia and elevated fatty acid levels. In this review, we will summarise and discuss current findings about the regulation of HIF signalling in diabetes and the pathogenic roles of hypoxia and dysregulated HIF signalling in the development of diabetes and its complications. The therapeutic potential of targeting HIF signalling for the prevention and treatment of diabetes and related complications is also discussed.
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Affiliation(s)
- Sergiu-Bogdan Catrina
- Department of Molecular Medicine and Surgery, Karolinska Institutet, Stockholm, Sweden.
- Department of Endocrinology and Diabetes, Karolinska University Hospital, Stockholm, Sweden.
- Center for Diabetes, Academic Specialist Centrum, Stockholm, Sweden.
| | - Xiaowei Zheng
- Department of Molecular Medicine and Surgery, Karolinska Institutet, Stockholm, Sweden.
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59
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Walsh MD. Commentary on: Deferiprone Stimulates Aged Dermal Fibroblasts via HIF-1α Modulation. Aesthet Surg J 2021; 41:525-526. [PMID: 32794550 DOI: 10.1093/asj/sjaa205] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Affiliation(s)
- Mark D Walsh
- Dr Walsh is an Assistant Professor of Surgery and Associate Program Director, Division of Plastic and Reconstructive Surgery, Department of Surgery, Emory University School of Medicine, Atlanta, GA
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60
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Pagani A, Kirsch BM, Hopfner U, Aitzetmueller MM, Brett EA, Thor D, Mela P, Machens HG, Duscher D. Deferiprone Stimulates Aged Dermal Fibroblasts via HIF-1α Modulation. Aesthet Surg J 2021; 41:514-524. [PMID: 32479616 DOI: 10.1093/asj/sjaa142] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
BACKGROUND Hypoxia-inducible factor 1α (HIF-1α), a transcription factor responsible for tissue homeostasis and regeneration, presents reduced functionality in advanced age. In addition to absence of oxygen, sequestration of iron also stimulates HIF-1α. Therefore, we analyzed the efficacy of the iron-chelator deferiprone (DFP) at stimulating dermal fibroblasts. OBJECTIVES The main objective of this study was to quantify the DFP concentrations capable of stimulating dermal fibroblasts in vitro and to correlate the effective DFP concentrations with the ability of DFP to penetrate the epidermis, reach the dermis, and activate HIF-1α in vivo. METHODS We measured cell proliferation, metabolic activity, HIF-1α expression, and lactate dehydrogenase levels of both young and aged fibroblasts after a 24-hour in vitro preconditioning with DFP. In addition, we evaluated cell survival rates and morphology with different cellular stainings. Finally, we performed a transdermal permeation study with a 1% DFP topical formulation to quantify the concentration required to reach the dermis. RESULTS In vitro administration of iron-chelation therapy (156-312.5 µg/mL DFP ) on aged fibroblasts resulted in activation of various antiaging processes. The concentration required to reach the dermis within 24 hours was 1.5% (0.15 mg/mL), which corresponds well with the effective doses of our laboratory analyses. CONCLUSIONS The activation of HIF-1α by DFP enhances cell metabolism, proliferation, and survival of fibroblasts while reducing lactate dehydrogenase levels. Modulation of HIF-1α is linked to activation of key regeneration enzymes and proteins, and by proxy, antiaging. Therefore, the antiaging properties of DFP and its satisfactory dermal penetration make it a promising regenerative agent.
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Affiliation(s)
| | | | | | | | | | - Dominik Thor
- College of Pharmacy, University of Florida, Gainesville, FL
| | - Petra Mela
- Technical University of Munich, Munich, Germany
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61
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Zhu F, Zi L, Yang P, Wei Y, Zhong R, Wang Y, You C, Li Y, Tian M, Gu Z. Efficient Iron and ROS Nanoscavengers for Brain Protection after Intracerebral Hemorrhage. ACS APPLIED MATERIALS & INTERFACES 2021; 13:9729-9738. [PMID: 33599495 DOI: 10.1021/acsami.1c00491] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Intracerebral hemorrhage (ICH) will be accompanied by the overload of iron and reactive oxygen species (ROS) following hematoma clearance. Although deferoxamine (DFO) has been widely utilized as a clinical first-line siderophore to remove the iron overload, the ROS-inducing damage still greatly limits the therapeutic effect of DFO. To address this issue, we designed and fabricated a series of dual-functional macromolecular nanoscavengers featuring high-density DFO units and catechol moieties. Note that the former units could effectively remove the iron overload, while the latter ones could efficiently deplete the ROS. The resulting nanoscavengers efficiently down-regulate the iron and ROS levels as well as significantly reduce the cell death in both iron-overloaded RAW 264.7 cells and the ICH mice model. This work suggests a novel clue for the ICH-ameliorated iron-depleting interventional therapeutic regimen.
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Affiliation(s)
- Fang Zhu
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, Sichuan 610065, P. R. China
| | - Liu Zi
- Neurosurgery Research Laboratory, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, P. R. China
| | - Peng Yang
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, Sichuan 610065, P. R. China
| | - Yang Wei
- Neurosurgery Research Laboratory, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, P. R. China
| | - Rui Zhong
- Institute of Blood Transfusion, Chinese Academy of Medical Sciences, Peking Union Medical College, Chengdu, Sichuan 610052, P. R. China
| | - Yan Wang
- Core Facilities of West China Hospital, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, P. R. China
| | - Chao You
- Neurosurgery Research Laboratory, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, P. R. China
| | - Yiwen Li
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, Sichuan 610065, P. R. China
| | - Meng Tian
- Neurosurgery Research Laboratory, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, P. R. China
| | - Zhipeng Gu
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, Sichuan 610065, P. R. China
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Ding Z, Zhang Y, Guo P, Duan T, Cheng W, Guo Y, Zheng X, Lu G, Lu Q, Kaplan DL. Injectable Desferrioxamine-Laden Silk Nanofiber Hydrogels for Accelerating Diabetic Wound Healing. ACS Biomater Sci Eng 2021; 7:1147-1158. [PMID: 33522800 DOI: 10.1021/acsbiomaterials.0c01502] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Dysangiogenesis and chronic inflammation are two critical reasons for diabetic foot ulcers. Desferrioxamine (DFO) was used clinically in the treatment of diabetic foot ulcers by repeated injections because of its capacity to induce vascularization. Biocompatible carriers that release DFO slowly and facilitate healing simultaneously are preferable options to accelerate the healing of diabetic wounds. Here, DFO-laden silk nanofiber hydrogels that provided a sustained release of DFO for more than 40 days were used to treat diabetic wounds. The DFO-laden hydrogels stimulated the healing of diabetic wounds. In vitro cell studies revealed that the DFO-laden hydrogels modulated the migration and gene expression of endothelial cells, and they also tuned the inflammation behavior of macrophages. These results were confirmed in an in vivo diabetic wound model. The DFO-laden hydrogels alleviated dysangiogenesis and chronic inflammation in the diabetic wounds, resulting in a more rapid wound healing and increased collagen deposition. Both in vitro and in vivo studies suggested potential clinical applications of these DFO-laden hydrogels in the treatment of diabetic ulcers.
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Affiliation(s)
- Zhaozhao Ding
- National Engineering Laboratory for Modern Silk & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215123, P. R. China
| | - Yunhua Zhang
- Department of Burns and Plastic Surgery, The Affiliated Hospital of Jiangnan University, Wuxi 214041, P. R. China
| | - Peng Guo
- Department of Burns and Plastic Surgery, The Affiliated Hospital of Jiangnan University, Wuxi 214041, P. R. China
| | - Tianbi Duan
- Center of Technology, Shuanghai Inoherb Cosmetics Co. Ltd., Shanghai 200444, P. R. China
| | - Weinan Cheng
- Department of Orthopedics, The First Affiliated Hospital of Xiamen University, Xiamen 361000, P. R. China
| | - Yang Guo
- Department of Orthopedics, The First Affiliated Hospital of Xiamen University, Xiamen 361000, P. R. China
| | - Xin Zheng
- Department of Orthopedics, Taizhou Municipal Hospital, Taizhou 318000, P. R. China
| | - Guozhong Lu
- Department of Burns and Plastic Surgery, The Affiliated Hospital of Jiangnan University, Wuxi 214041, P. R. China
| | - Qiang Lu
- National Engineering Laboratory for Modern Silk & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215123, P. R. China
| | - David L Kaplan
- Department of Biomedical Engineering, Tufts University, Medford, Massachusetts 02155, United States
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63
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Fan D, Fang Q. Siderophores for medical applications: Imaging, sensors, and therapeutics. Int J Pharm 2021; 597:120306. [PMID: 33540031 DOI: 10.1016/j.ijpharm.2021.120306] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2020] [Revised: 01/19/2021] [Accepted: 01/20/2021] [Indexed: 01/07/2023]
Abstract
Siderophores are low-molecular-weight chelators produced by microorganisms to scavenge iron from the environment and deliver it to cells via specific receptors. Tremendous researches on the molecular basis of siderophore regulation, synthesis, secretion, and uptake have inspired their diverse applications in the medical field. Replacing iron with radionuclides in siderophores, such as the most prominent Ga-68 for positron emission tomography (PET), carves out ways for targeted imaging of infectious diseases and cancers. Additionally, the high affinity of siderophores for metal ions or microorganisms makes them a potent detecting moiety in sensors that can be used for diagnosis. As for therapeutics, the notable Trojan horse-inspired siderophore-antibiotic conjugates demonstrate enhanced toxicity against multi-drug resistant (MDR) pathogens. Besides, siderophores can tackle iron overload diseases and, when combined with moieties such as hydrogels and nanoparticles, a wide spectrum of iron-induced diseases and even cancers. In this review, we briefly outline the related mechanisms, before summarizing the siderophore-based applications in imaging, sensors, and therapeutics.
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Affiliation(s)
- Di Fan
- Laboratory of Theoretical and Computational Nanoscience, CAS Key Laboratory of Nanophotonic Materials and Devices, CAS Center for Excellence in Nanoscience, Beijing Key Laboratory of Ambient Particles Health Effects and Prevention Techniques, National Center for Nanoscience and Technology, Chinese Academy of Sciences, Beijing 100190, PR China; University of Chinese Academy of Sciences, No. 19A Yuquan Road, Beijing 100049, PR China
| | - Qiaojun Fang
- Laboratory of Theoretical and Computational Nanoscience, CAS Key Laboratory of Nanophotonic Materials and Devices, CAS Center for Excellence in Nanoscience, Beijing Key Laboratory of Ambient Particles Health Effects and Prevention Techniques, National Center for Nanoscience and Technology, Chinese Academy of Sciences, Beijing 100190, PR China; University of Chinese Academy of Sciences, No. 19A Yuquan Road, Beijing 100049, PR China; Sino-Danish Center for Education and Research, Beijing 101408, PR China.
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64
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Bukowiecki J, Pförringer D, Thor D, Duscher D, Brett E. HIF-1α Stimulators Function Equally to Leading Hair Loss Agents in Enhancing Dermal Papilla Growth. Skin Pharmacol Physiol 2020; 33:309-316. [PMID: 33326985 DOI: 10.1159/000512123] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2020] [Accepted: 10/03/2020] [Indexed: 11/19/2022]
Abstract
INTRODUCTION Androgenic alopecia (AGA) occurs due to progressive miniaturization of the dermal papilla (DP). During this process the hair follicle loses nutrition over time and eventually dies, causing the hair to fall out. Recent evidence suggests that hypoxia-inducible factor-1a (HIF-1α) modulation may counteract hair loss. This study aims to evaluate the proliferation of dermal papilla cells (DPCs) under the influence of a selection of commercially available topical hair loss drugs, compared to HIF-1α-stimulating agents. MATERIALS AND METHODS Using the hanging drop method, DPCs self-organized into spheroid shape, mirroring the three-dimensional (3D) structure of the DP in vivo. DP analogs were treated with established substances against AGA (minoxidil and caffeine) compared to HIF-1α-stimulating agents (deferoxamine [DFO] and deferiprone [DFP]), at 10 mM doses. DP analogs were simultaneously stained with 5-bromo-2'-deoxyuridine (BrdU) to evaluate impact of drug compounds on DP daughter cell production. Concurrently, fluorescent microscopy visualization of migration of daughter cells after 48 h in culture was performed. RESULTS DPC proliferation within the spheroid structure was significantly enhanced by caffeine, minoxidil, and the HIF-1α-stimulating agent DFP when compared to control. Highest proliferation was seen in the DFP-treated DP analogs. Migration of peripheral DP daughter cells was highest in control and DFO groups. CONCLUSION Here we demonstrate a significantly enhanced proliferative activity for both established substances against AGA (minoxidil and caffeine) and the HIF-1α-stimulating agent DFP in a 3D DPC spheroid culture model with equal results for DFP and minoxidil. These favorable characteristics make such compounds potential water-soluble alternatives to minoxidil.
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Affiliation(s)
- Julia Bukowiecki
- Department of Plastic and Hand Surgery, Technical University of Munich, Munich, Germany
| | - Dominik Pförringer
- Department of Traumatology, Technical University of Munich, Munich, Germany
| | - Dominik Thor
- College of Pharmacy, University of Florida, Gainesville, Florida, USA.,Tomorrowlabs GmbH, Wien, Austria
| | - Dominik Duscher
- Department of Plastic and Hand Surgery, Technical University of Munich, Munich, Germany.,Tomorrowlabs GmbH, Wien, Austria.,Section of Plastic Surgery, Kepler University Hospital, Linz, Austria.,Department of Plastic, Reconstructive, Hand and Burn Surgery, BG-Trauma Center, Eberhard Karls University Tübingen, Tübingen, Germany
| | - Elizabeth Brett
- Department of Plastic and Hand Surgery, Technical University of Munich, Munich, Germany, .,Department of Plastic, Reconstructive, Hand and Burn Surgery, BG-Trauma Center, Eberhard Karls University Tübingen, Tübingen, Germany,
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65
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Bai Q, Han K, Dong K, Zheng C, Zhang Y, Long Q, Lu T. Potential Applications of Nanomaterials and Technology for Diabetic Wound Healing. Int J Nanomedicine 2020; 15:9717-9743. [PMID: 33299313 PMCID: PMC7721306 DOI: 10.2147/ijn.s276001] [Citation(s) in RCA: 104] [Impact Index Per Article: 26.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2020] [Accepted: 10/23/2020] [Indexed: 12/22/2022] Open
Abstract
Diabetic wound shows delayed and incomplete healing processes, which in turn exposes patients to an environment with a high risk of infection. This article has summarized current developments of nanoparticles/hydrogels and nanotechnology used for promoting the wound healing process in either diabetic animal models or patients with diabetes mellitus. These nanoparticles/hydrogels promote diabetic wound healing by loading bioactive molecules (such as growth factors, genes, proteins/peptides, stem cells/exosomes, etc.) and non-bioactive substances (metal ions, oxygen, nitric oxide, etc.). Among them, smart hydrogels (a very promising method for loading many types of bioactive components) are currently favored by researchers. In addition, nanoparticles/hydrogels can be combined with some technology (including PTT, LBL self-assembly technique and 3D-printing technology) to treat diabetic wound repair. By reviewing the recent literatures, we also proposed new strategies for improving multifunctional treatment of diabetic wounds in the future.
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Affiliation(s)
- Que Bai
- School of Life Sciences, Northwestern Polytechnical University, Xi’an, Shaanxi710072, People’s Republic of China
| | - Kai Han
- School of Life Sciences, Northwestern Polytechnical University, Xi’an, Shaanxi710072, People’s Republic of China
| | - Kai Dong
- School of Life Sciences, Northwestern Polytechnical University, Xi’an, Shaanxi710072, People’s Republic of China
| | - Caiyun Zheng
- School of Life Sciences, Northwestern Polytechnical University, Xi’an, Shaanxi710072, People’s Republic of China
| | - Yanni Zhang
- School of Life Sciences, Northwestern Polytechnical University, Xi’an, Shaanxi710072, People’s Republic of China
| | - Qianfa Long
- Mini-Invasive Neurosurgery and Translational Medical Center, Xi’an Central Hospital, Xi’an Jiaotong University, Xi’an710003, People’s Republic of China
| | - Tingli Lu
- School of Life Sciences, Northwestern Polytechnical University, Xi’an, Shaanxi710072, People’s Republic of China
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66
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Nour S, Imani R, Chaudhry GR, Sharifi AM. Skin wound healing assisted by angiogenic targeted tissue engineering: A comprehensive review of bioengineered approaches. J Biomed Mater Res A 2020; 109:453-478. [PMID: 32985051 DOI: 10.1002/jbm.a.37105] [Citation(s) in RCA: 43] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2020] [Revised: 09/23/2020] [Accepted: 09/26/2020] [Indexed: 12/16/2022]
Abstract
Skin injuries and in particular, chronic wounds, are one of the major prevalent medical problems, worldwide. Due to the pivotal role of angiogenesis in tissue regeneration, impaired angiogenesis can cause several complications during the wound healing process and skin regeneration. Therefore, induction or promotion of angiogenesis can be considered as a promising approach to accelerate wound healing. This article presents a comprehensive overview of current and emerging angiogenesis induction methods applied in several studies for skin regeneration, which are classified into the cell, growth factor, scaffold, and biological/chemical compound-based strategies. In addition, the advantages and disadvantages of these angiogenic strategies along with related research examples are discussed in order to demonstrate their potential in the treatment of wounds.
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Affiliation(s)
- Shirin Nour
- Department of Biomedical Engineering, Amirkabir University of Technology (Tehran Polytechnic), Tehran, Iran
| | - Rana Imani
- Department of Biomedical Engineering, Amirkabir University of Technology (Tehran Polytechnic), Tehran, Iran
| | - G Rasul Chaudhry
- OU-WB Institute for Stem Cell and Regenerative Medicine, Department of Biological Sciences, Oakland University, Rochester, Michigan, USA
| | - Ali Mohammad Sharifi
- Stem Cell and Regenerative Medicine Research Center, Iran University of Medical Sciences, Tehran, Iran.,Tissue Engineering Group (NOCERAL), Department of Orthopedics Surgery, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia.,Department of Tissue Engineering and Regenerative Medicine, School of Advanced Technologies in Medicine, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
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67
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Farr AC, Xiong MP. Challenges and Opportunities of Deferoxamine Delivery for Treatment of Alzheimer's Disease, Parkinson's Disease, and Intracerebral Hemorrhage. Mol Pharm 2020; 18:593-609. [PMID: 32926630 DOI: 10.1021/acs.molpharmaceut.0c00474] [Citation(s) in RCA: 63] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Deferoxamine mesylate (DFO) is an FDA-approved, hexadentate iron chelator routinely used to alleviate systemic iron burden in thalassemia major and sickle cell patients. Iron accumulation in these disease states results from the repeated blood transfusions required to manage these conditions. Iron accumulation has also been implicated in the pathogenesis of Alzheimer's disease (AD), Parkinson's disease (PD), and secondary injury following intracerebral hemorrhage (ICH). Chelation of brain iron is thus a promising therapeutic strategy for improving behavioral outcomes and slowing neurodegeneration in the aforementioned disease states, though the effectiveness of DFO treatment is limited on several accounts. Systemically administered DFO results in nonspecific toxicity at high doses, and the drug's short half-life leads to low patient compliance. Mixed reports of DFO's ability to cross the blood-brain barrier (BBB) also appear in literature. These limitations necessitate novel DFO formulations prior to the drug's widespread use in managing neurodegeneration. Herein, we discuss the various dosing regimens and formulations employed in intranasal (IN) or systemic DFO treatment, as well as the physiological and behavioral outcomes observed in animal models of AD, PD, and ICH. The clinical progress of chelation therapy with DFO in managing neurodegeneration is also evaluated. Finally, the elimination of intranasally administered particles via the glymphatic system and efflux transporters is discussed. Abundant preclinical evidence suggests that intranasal DFO treatment improves memory retention and behavioral outcome in rodent models of AD, PD, and ICH. Several other biochemical and physiological metrics, such as tau phosphorylation, the survival of tyrosine hydroxylase-positive neurons, and infarct volume, are also positively affected by intranasal DFO treatment. However, dosing regimens are inconsistent across studies, and little is known about brain DFO concentration following treatment. Systemic DFO treatment yields similar results, and some complex formulations have been developed to improve permeability across the BBB. However, despite the success in preclinical models, clinical translation is limited with most clinical evidence investigating DFO treatment in ICH patients, where high-dose treatment has proven dangerous and dosing regimens are not consistent across studies. DFO is a strong drug candidate for managing neurodegeneration in the aging population, but before it can be routinely implemented as a therapeutic agent, dosing regimens must be standardized, and brain DFO content following drug administration must be understood and controlled via novel formulations.
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Affiliation(s)
- Amy Corbin Farr
- Department of Pharmaceutical & Biomedical Sciences, College of Pharmacy, University of Georgia, Athens, Georgia 30602, United States
| | - May P Xiong
- Department of Pharmaceutical & Biomedical Sciences, College of Pharmacy, University of Georgia, Athens, Georgia 30602, United States
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Abstract
Wound healing is a complex, dynamic process supported by a myriad of cellular events that must be tightly coordinated to efficiently repair damaged tissue. Derangement in wound-linked cellular behaviours, as occurs with diabetes and ageing, can lead to healing impairment and the formation of chronic, non-healing wounds. These wounds are a significant socioeconomic burden due to their high prevalence and recurrence. Thus, there is an urgent requirement for the improved biological and clinical understanding of the mechanisms that underpin wound repair. Here, we review the cellular basis of tissue repair and discuss how current and emerging understanding of wound pathology could inform future development of efficacious wound therapies.
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Affiliation(s)
- Holly N Wilkinson
- Centre for Atherothrombosis and Metabolic Disease, Hull York Medical School, The University of Hull, Hull HU6 7RX, United Kingdom
| | - Matthew J Hardman
- Centre for Atherothrombosis and Metabolic Disease, Hull York Medical School, The University of Hull, Hull HU6 7RX, United Kingdom
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Giuliani A, Lorenzini L, Baldassarro VA, Pannella M, Cescatti M, Fernandez M, Alastra G, Flagelli A, Villetti G, Imbimbo BP, Giardino L, Calzà L. Effects of Topical Application of CHF6467, a Mutated Form of Human Nerve Growth Factor, on Skin Wound Healing in Diabetic Mice. J Pharmacol Exp Ther 2020; 375:317-331. [PMID: 32948647 DOI: 10.1124/jpet.120.000110] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2020] [Accepted: 08/26/2020] [Indexed: 12/16/2022] Open
Abstract
Nerve growth factor (NGF) is the protein responsible for the development and maintenance of sensory skin innervation. Given the role of appropriate innervation in skin healing, NGF has been indicated as a possible prohealing treatment in pathologic conditions characterized by nerve-ending loss, such as chronic ulcers in diabetes; however, its use as a therapeutic agent is limited by its hyperalgesic effect. We tested the effect of topical application of the nonalgogenic NGF derivative hNGFP61S/R100E in two models of skin ulcer induced in dbdb diabetic mice, investigating healing time, skin histology, reinnervation, and angiogenesis using morphologic and molecular approaches. We showed that the topical administration of CHF6467, a recombinant human NGF in which an amino acid substitution (R100E) abolished the hyperalgesic effect usually associated with NGF, accelerated skin repair in experimental wounds (full-excision and pressure-ulcer) induced in diabetic mice (dbdb). CHF6467-induced acceleration of wound healing was accompanied by increased re-epithelization, reinnervation, and revascularization as assessed by histology, immunohistochemistry, and image analysis. Bioinformatic analysis of differentially expressed genes and signaling pathways in the wound tissues showed that protein kinase B-mammalian target of rapamycin was the most regulated pathway. In spite of the transdermal absorption leading to measurable, dose-dependent increases in CHF6467 plasma levels, no systemic thermal or local mechanical hyperalgesia was observed in treated mice. When tested in vitro in human cell lines, CHF6467 stimulated keratinocyte and fibroblast proliferation and tube formation by endothelial cells. Collectively, these results support a possible use of CHF6467 as a prohealing agent in skin lesions in diabetes. SIGNIFICANCE STATEMENT: Topical application of CHF6467 accelerates reinnervation, neoangiogenesis, and wound healing in diabetic mice in both full-thickness skin-excision and pressure-ulcer models through the protein kinase B/mammalian target of rapamycin pathway and does not induce hyperalgesia.
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Affiliation(s)
- A Giuliani
- Department of Veterinary Medical Science, University of Bologna, Italy (A.G., L.L., M.F., L.G.); Interdepartmental Center for Industrial Research in Life Sciences and Technologies University of Bologna, Italy (L.L., V.A.B., G.A., A.F, L.G., L.C.); Department of of Pharmacy and Biotechnology, University of Bologna, Italy (L.C.); Fondazione IRET, Ozzano Emilia, Italy (M.P., M.C.); Chiesi Farmaceutici, Parma, Italy (G.V., B.P.I.)
| | - L Lorenzini
- Department of Veterinary Medical Science, University of Bologna, Italy (A.G., L.L., M.F., L.G.); Interdepartmental Center for Industrial Research in Life Sciences and Technologies University of Bologna, Italy (L.L., V.A.B., G.A., A.F, L.G., L.C.); Department of of Pharmacy and Biotechnology, University of Bologna, Italy (L.C.); Fondazione IRET, Ozzano Emilia, Italy (M.P., M.C.); Chiesi Farmaceutici, Parma, Italy (G.V., B.P.I.)
| | - V A Baldassarro
- Department of Veterinary Medical Science, University of Bologna, Italy (A.G., L.L., M.F., L.G.); Interdepartmental Center for Industrial Research in Life Sciences and Technologies University of Bologna, Italy (L.L., V.A.B., G.A., A.F, L.G., L.C.); Department of of Pharmacy and Biotechnology, University of Bologna, Italy (L.C.); Fondazione IRET, Ozzano Emilia, Italy (M.P., M.C.); Chiesi Farmaceutici, Parma, Italy (G.V., B.P.I.)
| | - M Pannella
- Department of Veterinary Medical Science, University of Bologna, Italy (A.G., L.L., M.F., L.G.); Interdepartmental Center for Industrial Research in Life Sciences and Technologies University of Bologna, Italy (L.L., V.A.B., G.A., A.F, L.G., L.C.); Department of of Pharmacy and Biotechnology, University of Bologna, Italy (L.C.); Fondazione IRET, Ozzano Emilia, Italy (M.P., M.C.); Chiesi Farmaceutici, Parma, Italy (G.V., B.P.I.)
| | - M Cescatti
- Department of Veterinary Medical Science, University of Bologna, Italy (A.G., L.L., M.F., L.G.); Interdepartmental Center for Industrial Research in Life Sciences and Technologies University of Bologna, Italy (L.L., V.A.B., G.A., A.F, L.G., L.C.); Department of of Pharmacy and Biotechnology, University of Bologna, Italy (L.C.); Fondazione IRET, Ozzano Emilia, Italy (M.P., M.C.); Chiesi Farmaceutici, Parma, Italy (G.V., B.P.I.)
| | - M Fernandez
- Department of Veterinary Medical Science, University of Bologna, Italy (A.G., L.L., M.F., L.G.); Interdepartmental Center for Industrial Research in Life Sciences and Technologies University of Bologna, Italy (L.L., V.A.B., G.A., A.F, L.G., L.C.); Department of of Pharmacy and Biotechnology, University of Bologna, Italy (L.C.); Fondazione IRET, Ozzano Emilia, Italy (M.P., M.C.); Chiesi Farmaceutici, Parma, Italy (G.V., B.P.I.)
| | - G Alastra
- Department of Veterinary Medical Science, University of Bologna, Italy (A.G., L.L., M.F., L.G.); Interdepartmental Center for Industrial Research in Life Sciences and Technologies University of Bologna, Italy (L.L., V.A.B., G.A., A.F, L.G., L.C.); Department of of Pharmacy and Biotechnology, University of Bologna, Italy (L.C.); Fondazione IRET, Ozzano Emilia, Italy (M.P., M.C.); Chiesi Farmaceutici, Parma, Italy (G.V., B.P.I.)
| | - A Flagelli
- Department of Veterinary Medical Science, University of Bologna, Italy (A.G., L.L., M.F., L.G.); Interdepartmental Center for Industrial Research in Life Sciences and Technologies University of Bologna, Italy (L.L., V.A.B., G.A., A.F, L.G., L.C.); Department of of Pharmacy and Biotechnology, University of Bologna, Italy (L.C.); Fondazione IRET, Ozzano Emilia, Italy (M.P., M.C.); Chiesi Farmaceutici, Parma, Italy (G.V., B.P.I.)
| | - G Villetti
- Department of Veterinary Medical Science, University of Bologna, Italy (A.G., L.L., M.F., L.G.); Interdepartmental Center for Industrial Research in Life Sciences and Technologies University of Bologna, Italy (L.L., V.A.B., G.A., A.F, L.G., L.C.); Department of of Pharmacy and Biotechnology, University of Bologna, Italy (L.C.); Fondazione IRET, Ozzano Emilia, Italy (M.P., M.C.); Chiesi Farmaceutici, Parma, Italy (G.V., B.P.I.)
| | - B P Imbimbo
- Department of Veterinary Medical Science, University of Bologna, Italy (A.G., L.L., M.F., L.G.); Interdepartmental Center for Industrial Research in Life Sciences and Technologies University of Bologna, Italy (L.L., V.A.B., G.A., A.F, L.G., L.C.); Department of of Pharmacy and Biotechnology, University of Bologna, Italy (L.C.); Fondazione IRET, Ozzano Emilia, Italy (M.P., M.C.); Chiesi Farmaceutici, Parma, Italy (G.V., B.P.I.)
| | - L Giardino
- Department of Veterinary Medical Science, University of Bologna, Italy (A.G., L.L., M.F., L.G.); Interdepartmental Center for Industrial Research in Life Sciences and Technologies University of Bologna, Italy (L.L., V.A.B., G.A., A.F, L.G., L.C.); Department of of Pharmacy and Biotechnology, University of Bologna, Italy (L.C.); Fondazione IRET, Ozzano Emilia, Italy (M.P., M.C.); Chiesi Farmaceutici, Parma, Italy (G.V., B.P.I.)
| | - L Calzà
- Department of Veterinary Medical Science, University of Bologna, Italy (A.G., L.L., M.F., L.G.); Interdepartmental Center for Industrial Research in Life Sciences and Technologies University of Bologna, Italy (L.L., V.A.B., G.A., A.F, L.G., L.C.); Department of of Pharmacy and Biotechnology, University of Bologna, Italy (L.C.); Fondazione IRET, Ozzano Emilia, Italy (M.P., M.C.); Chiesi Farmaceutici, Parma, Italy (G.V., B.P.I.)
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Januszyk M, Chen K, Henn D, Foster DS, Borrelli MR, Bonham CA, Sivaraj D, Wagh D, Longaker MT, Wan DC, Gurtner GC. Characterization of Diabetic and Non-Diabetic Foot Ulcers Using Single-Cell RNA-Sequencing. MICROMACHINES 2020; 11:mi11090815. [PMID: 32872278 PMCID: PMC7570277 DOI: 10.3390/mi11090815] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/31/2020] [Revised: 08/25/2020] [Accepted: 08/27/2020] [Indexed: 12/19/2022]
Abstract
Background: Recent advances in high-throughput single-cell sequencing technologies have led to their increasingly widespread adoption for clinical applications. However, challenges associated with tissue viability, cell yield, and delayed time-to-capture have created unique obstacles for data processing. Chronic wounds, in particular, represent some of the most difficult target specimens, due to the significant amount of fibrinous debris, extracellular matrix components, and non-viable cells inherent in tissue routinely obtained from debridement. Methods: Here, we examined the feasibility of single cell RNA sequencing (scRNA-seq) analysis to evaluate human chronic wound samples acquired in the clinic, subjected to prolonged cold ischemia time, and processed without FACS sorting. Wound tissue from human diabetic and non-diabetic plantar foot ulcers were evaluated using an optimized 10X Genomics scRNA-seq platform and analyzed using a modified data pipeline designed for low-yield specimens. Cell subtypes were identified informatically and their distributions and transcriptional programs were compared between diabetic and non-diabetic tissue. Results: 139,000 diabetic and non-diabetic wound cells were delivered for 10X capture after either 90 or 180 min of cold ischemia time. cDNA library concentrations were 858.7 and 364.7 pg/µL, respectively, prior to sequencing. Among all barcoded fragments, we found that 83.5% successfully aligned to the human transcriptome and 68% met the minimum cell viability threshold. The average mitochondrial mRNA fraction was 8.5% for diabetic cells and 6.6% for non-diabetic cells, correlating with differences in cold ischemia time. A total of 384 individual cells were of sufficient quality for subsequent analyses; from this cell pool, we identified transcriptionally-distinct cell clusters whose gene expression profiles corresponded to fibroblasts, keratinocytes, neutrophils, monocytes, and endothelial cells. Fibroblast subpopulations with differing fibrotic potentials were identified, and their distributions were found to be altered in diabetic vs. non-diabetic cells. Conclusions: scRNA-seq of clinical wound samples can be achieved using minor modifications to standard processing protocols and data analysis methods. This simple approach can capture widespread transcriptional differences between diabetic and non-diabetic tissue obtained from matched wound locations.
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Affiliation(s)
- Michael Januszyk
- Department of Surgery, Division of Plastic and Reconstructive Surgery, Stanford University School of Medicine, Stanford, CA 94305, USA; (M.J.); (K.C.); (D.H.); (D.S.F.); (M.R.B.); (C.A.B.); (D.S.); (M.T.L.); (D.C.W.)
| | - Kellen Chen
- Department of Surgery, Division of Plastic and Reconstructive Surgery, Stanford University School of Medicine, Stanford, CA 94305, USA; (M.J.); (K.C.); (D.H.); (D.S.F.); (M.R.B.); (C.A.B.); (D.S.); (M.T.L.); (D.C.W.)
| | - Dominic Henn
- Department of Surgery, Division of Plastic and Reconstructive Surgery, Stanford University School of Medicine, Stanford, CA 94305, USA; (M.J.); (K.C.); (D.H.); (D.S.F.); (M.R.B.); (C.A.B.); (D.S.); (M.T.L.); (D.C.W.)
| | - Deshka S. Foster
- Department of Surgery, Division of Plastic and Reconstructive Surgery, Stanford University School of Medicine, Stanford, CA 94305, USA; (M.J.); (K.C.); (D.H.); (D.S.F.); (M.R.B.); (C.A.B.); (D.S.); (M.T.L.); (D.C.W.)
| | - Mimi R. Borrelli
- Department of Surgery, Division of Plastic and Reconstructive Surgery, Stanford University School of Medicine, Stanford, CA 94305, USA; (M.J.); (K.C.); (D.H.); (D.S.F.); (M.R.B.); (C.A.B.); (D.S.); (M.T.L.); (D.C.W.)
| | - Clark A. Bonham
- Department of Surgery, Division of Plastic and Reconstructive Surgery, Stanford University School of Medicine, Stanford, CA 94305, USA; (M.J.); (K.C.); (D.H.); (D.S.F.); (M.R.B.); (C.A.B.); (D.S.); (M.T.L.); (D.C.W.)
| | - Dharshan Sivaraj
- Department of Surgery, Division of Plastic and Reconstructive Surgery, Stanford University School of Medicine, Stanford, CA 94305, USA; (M.J.); (K.C.); (D.H.); (D.S.F.); (M.R.B.); (C.A.B.); (D.S.); (M.T.L.); (D.C.W.)
| | - Dhananjay Wagh
- Stanford Functional Genomics Facility, Stanford University School of Medicine, Stanford, CA 94305, USA;
| | - Michael T. Longaker
- Department of Surgery, Division of Plastic and Reconstructive Surgery, Stanford University School of Medicine, Stanford, CA 94305, USA; (M.J.); (K.C.); (D.H.); (D.S.F.); (M.R.B.); (C.A.B.); (D.S.); (M.T.L.); (D.C.W.)
| | - Derrick C. Wan
- Department of Surgery, Division of Plastic and Reconstructive Surgery, Stanford University School of Medicine, Stanford, CA 94305, USA; (M.J.); (K.C.); (D.H.); (D.S.F.); (M.R.B.); (C.A.B.); (D.S.); (M.T.L.); (D.C.W.)
| | - Geoffrey C. Gurtner
- Department of Surgery, Division of Plastic and Reconstructive Surgery, Stanford University School of Medicine, Stanford, CA 94305, USA; (M.J.); (K.C.); (D.H.); (D.S.F.); (M.R.B.); (C.A.B.); (D.S.); (M.T.L.); (D.C.W.)
- Correspondence: ; Tel.: +1-650-736-2776
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El-Gizawy SA, Nouh A, Saber S, Kira AY. Deferoxamine-loaded transfersomes accelerates healing of pressure ulcers in streptozotocin-induced diabetic rats. J Drug Deliv Sci Technol 2020. [DOI: 10.1016/j.jddst.2020.101732] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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72
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Prophylactic treatment with transdermal deferoxamine mitigates radiation-induced skin fibrosis. Sci Rep 2020; 10:12346. [PMID: 32704071 PMCID: PMC7378074 DOI: 10.1038/s41598-020-69293-4] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2020] [Accepted: 07/06/2020] [Indexed: 12/22/2022] Open
Abstract
Radiation therapy can result in pathological fibrosis of healthy soft tissue. The iron chelator deferoxamine (DFO) has been shown to improve skin vascularization when injected into radiated tissue prior to fat grafting. Here, we evaluated whether topical DFO administration using a transdermal drug delivery system prior to and immediately following irradiation (IR) can mitigate the chronic effects of radiation damage to the skin. CD-1 nude immunodeficient mice were split into four experimental groups: (1) IR alone (IR only), (2) DFO treatment for two weeks after recovery from IR (DFO post-IR), (3) DFO prophylaxis with treatment through and post-IR (DFO ppx), or (4) no irradiation or DFO (No IR). Immediately following IR, reactive oxygen species and apoptotic markers were significantly decreased and laser doppler analysis revealed significantly improved skin perfusion in mice receiving prophylactic DFO. Six weeks following IR, mice in the DFO post-IR and DFO ppx groups had improved skin perfusion and increased vascularization. DFO-treated groups also had evidence of reduced dermal thickness and collagen fiber network organization akin to non-irradiated skin. Thus, transdermal delivery of DFO improves tissue perfusion and mitigates chronic radiation-induced skin fibrosis, highlighting a potential role for DFO in the treatment of oncological patients.
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Reply: Recipient-Site Preconditioning with Deferoxamine Increases Fat Graft Survival by Inducing VEGF and Neovascularization in a Rat Model. Plast Reconstr Surg 2020; 146:102e. [PMID: 32590680 DOI: 10.1097/prs.0000000000006930] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Zhang L, Xiang Y, Zhang H, Cheng L, Mao X, An N, Zhang L, Zhou J, Deng L, Zhang Y, Sun X, Santos HA, Cui W. A Biomimetic 3D-Self-Forming Approach for Microvascular Scaffolds. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2020; 7:1903553. [PMID: 32382485 PMCID: PMC7201264 DOI: 10.1002/advs.201903553] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/10/2019] [Revised: 01/28/2020] [Accepted: 02/13/2020] [Indexed: 05/12/2023]
Abstract
The development of science and technology often drew lessons from natural phenomena. Herein, inspired by drying-driven curling of apple peels, hydrogel-based micro-scaled hollow tubules (MHTs) are proposed for biomimicking microvessels, which promote microcirculation and improve the survival of random skin flaps. MHTs with various pipeline structures are fabricated using hydrogel in corresponding shapes, such as Y-branches, anastomosis rings, and triangle loops. Adjustable diameters can be achieved by altering the concentration and cross-linking time of the hydrogel. Based on this rationale, biomimetic microvessels with diameters of 50-500 µm are cultivated in vitro by coculture of MHTs and human umbilical vein endothelial cells. In vivo studies show their excellent performance to promote microcirculation and improve the survival of random skin flaps. In conclusion, the present work proposes and validifies a biomimetic 3D self-forming method for the fabrication of biomimetic vessels and microvascular scaffolds with high biocompatibility and stability based on hydrogel materials, such as gelatin and hyaluronic acid.
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Affiliation(s)
- Liucheng Zhang
- Department of Plastic and Reconstructive SurgeryShanghai Ninth People's HospitalShanghai JiaoTong University School of Medicine639 Zhi Zao Ju RoadShanghai200011P. R. China
| | - Yi Xiang
- Shanghai Key Laboratory for Prevention and Treatment of Bone and Joint DiseasesShanghai Institute of Traumatology and OrthopaedicsRuijin HospitalShanghai Jiao Tong University School of Medicine197 Ruijin 2nd RoadShanghai200025P. R. China
| | - Hongbo Zhang
- Department of Pharmaceutical Sciences Laboratory and Turku Center for BiotechnologyÅbo Akademi UniversityTurkuFI‐20520Finland
| | - Liying Cheng
- Department of Plastic and Reconstructive SurgeryShanghai Ninth People's HospitalShanghai JiaoTong University School of Medicine639 Zhi Zao Ju RoadShanghai200011P. R. China
| | - Xiyuan Mao
- Department of Plastic and Reconstructive SurgeryShanghai Ninth People's HospitalShanghai JiaoTong University School of Medicine639 Zhi Zao Ju RoadShanghai200011P. R. China
| | - Ning An
- State Key Laboratory for Strength and Vibration of Mechanical StructuresSchool of AerospaceXi'an Jiaotong UniversityXi'an710049P. R. China
| | - Lu Zhang
- Department of Plastic and Reconstructive SurgeryShanghai Ninth People's HospitalShanghai JiaoTong University School of Medicine639 Zhi Zao Ju RoadShanghai200011P. R. China
| | - Jinxiong Zhou
- State Key Laboratory for Strength and Vibration of Mechanical StructuresSchool of AerospaceXi'an Jiaotong UniversityXi'an710049P. R. China
| | - Lianfu Deng
- Shanghai Key Laboratory for Prevention and Treatment of Bone and Joint DiseasesShanghai Institute of Traumatology and OrthopaedicsRuijin HospitalShanghai Jiao Tong University School of Medicine197 Ruijin 2nd RoadShanghai200025P. R. China
| | - Yuguang Zhang
- Department of Plastic and Reconstructive SurgeryShanghai Ninth People's HospitalShanghai JiaoTong University School of Medicine639 Zhi Zao Ju RoadShanghai200011P. R. China
| | - Xiaoming Sun
- Department of Plastic and Reconstructive SurgeryShanghai Ninth People's HospitalShanghai JiaoTong University School of Medicine639 Zhi Zao Ju RoadShanghai200011P. R. China
| | - Hélder A. Santos
- Drug Research ProgramDivision of Pharmaceutical Chemistry and TechnologyFaculty of PharmacyUniversity of HelsinkiHelsinkiFI‐00014Finland
- Helsinki Institute of Life Science (HiLIFE)University of HelsinkiHelsinkiFI‐00014Finland
| | - Wenguo Cui
- Shanghai Key Laboratory for Prevention and Treatment of Bone and Joint DiseasesShanghai Institute of Traumatology and OrthopaedicsRuijin HospitalShanghai Jiao Tong University School of Medicine197 Ruijin 2nd RoadShanghai200025P. R. China
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Duscher D, Maan ZN, Hu MS, Thor D. A single-center blinded randomized clinical trial to evaluate the anti-aging effects of a novel HSF™-based skin care formulation. J Cosmet Dermatol 2020; 19:2936-2945. [PMID: 32306525 DOI: 10.1111/jocd.13356] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2019] [Revised: 01/09/2020] [Accepted: 02/17/2020] [Indexed: 12/01/2022]
Abstract
BACKGROUND Similar to chronic wounds, skin aging is characterized by dysfunction of key cellular regulatory pathways. The hypoxia-inducible factor-1 alpha (HIF-1α) pathway was linked to both conditions. Recent evidence suggests that modulating this pathway can rejuvenate aged fibroblasts and improve skin regeneration. Here, we describe the application of a novel HIF stimulating factor (HSF™)-based formulation for skin rejuvenation. METHODS Over a period of 6 weeks using a split-face study design, the effects on skin surface profile, skin moisture, and transepidermal water loss were determined in 32 female subjects (mean age 54, range 32-67 years) by Fast Optical in vivo Topometry of Human Skin (FOITSHD ), Corneometer, and Tewameter measurements. In addition, a photo documentation was performed for assessment by an expert panel and a survey regarding subject satisfaction was conducted. RESULTS No negative skin reactions of dermatological relevance were documented for the test product. A significant reduction in skin roughness could be demonstrated. The clinical evaluation of the images using a validated method confirmed significant improvement of wrinkles, in particular of fine wrinkles, lip wrinkles, and crow's feet. A significant skin moisturizing effect was detected while skin barrier function was preserved. The HSF™-based skin care formulation resulted in a self-reported 94% satisfaction rate. CONCLUSION With no negative skin reactions and highly significant effects on skin roughness, wrinkles, and moisturization, the HSF™-based skin care formulation achieved very satisfying outcomes in this clinical trial. Given the favorable results, this approach represents a promising innovation in aesthetic and regenerative medicine.
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Affiliation(s)
- Dominik Duscher
- Department of Plastic and Hand Surgery, Technical University Munich, Munich, Germany.,Section of Plastic Surgery, Johannes Kepler University Linz, Linz, Austria.,Tomorrowlabs GmbH, Wien, Austria
| | - Zeshaan N Maan
- Hagey Laboratory for Pediatric Regenerative Medicine, Stanford University School of Medicine, Stanford, CA, USA
| | - Michael S Hu
- Department for Plastic Surgery, University of Pittsburgh, Pittsburgh, PA, USA
| | - Dominik Thor
- College of Pharmacy, University of Florida, Gainesville, FL, USA.,Tomorrowlabs GmbH, Wien, Austria
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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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77
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Houschyar KS, Borrelli MR, Tapking C, Popp D, Puladi B, Ooms M, Chelliah MP, Rein S, Pförringer D, Thor D, Reumuth G, Wallner C, Branski LK, Siemers F, Grieb G, Lehnhardt M, Yazdi AS, Maan ZN, Duscher D. Molecular Mechanisms of Hair Growth and Regeneration: Current Understanding and Novel Paradigms. Dermatology 2020; 236:271-280. [PMID: 32163945 DOI: 10.1159/000506155] [Citation(s) in RCA: 76] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2019] [Accepted: 01/27/2020] [Indexed: 11/19/2022] Open
Abstract
Hair is a defining feature of mammals and has critical functions, including protection, production of sebum, apocrine sweat and pheromones, social and sexual interactions, thermoregulation, and provision of stem cells for skin homeostasis, regeneration, and repair. The hair follicle (HF) is considered a "mini-organ," consisting of intricate and well-organized structures which originate from HF stem and progenitor cells. Dermal papilla cells are the main components of the mesenchymal compartments in the hair bulb and are instrumental in generating signals to regulate the behavior of neighboring epithelial cells during the hair cycle. Mesenchymal-epithelial interactions within the dermal papilla niche drive HF embryonic development as well as the postnatal hair growth and regeneration cycle. This review summarizes the current understanding of HF development, repair, and regeneration, with special focus on cell signaling pathways governing these processes. In particular, we discuss emerging paradigms of molecular signaling governing the dermal papilla-epithelial cellular interactions during hair growth and maintenance and the recent progress made towards tissue engineering of human hair follicles.
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Affiliation(s)
- Khosrow Siamak Houschyar
- Department of Plastic Surgery, BG University Hospital Bergmannsheil, Ruhr University Bochum, Bochum, Germany
| | - Mimi R Borrelli
- Division of Plastic and Reconstructive Surgery, Department of Surgery, Stanford School of Medicine, Stanford, California, USA
| | - Christian Tapking
- Department of Surgery, Shriners Hospitals for Children-Galveston, University of Texas Medical Branch, Galveston, Texas, USA.,Department of Hand, Plastic and Reconstructive Surgery, Burn Trauma Center, BG Trauma Center Ludwigshafen, University of Heidelberg, Heidelberg, Germany
| | - Daniel Popp
- Department of Surgery, Shriners Hospitals for Children-Galveston, University of Texas Medical Branch, Galveston, Texas, USA.,Division of Plastic, Aesthetic and Reconstructive Surgery, Department of Surgery, Medical University of Graz, Graz, Austria
| | - Behrus Puladi
- Department of Oral and Maxillofacial Surgery, University Hospital RWTH, Aachen, Germany
| | - Mark Ooms
- Department of Oral and Maxillofacial Surgery, University Hospital RWTH, Aachen, Germany
| | - Malcolm P Chelliah
- Division of Plastic and Reconstructive Surgery, Department of Surgery, Stanford School of Medicine, Stanford, California, USA
| | - Susanne Rein
- Department of Plastic and Hand Surgery, Burn Center, Clinic St. Georg, Leipzig, Germany
| | - Dominik Pförringer
- Clinic and Policlinic of Trauma Surgery, Klinikum Rechts der Isar, Technische Universität München, Munich, Germany
| | - Dominik Thor
- College of Pharmacy, University of Florida Gainesville, Gainesville, Florida, USA
| | - Georg Reumuth
- Department of Plastic and Hand Surgery, Burn Unit, Trauma Center Bergmannstrost Halle, Halle, Germany
| | - Christoph Wallner
- Department of Plastic Surgery, BG University Hospital Bergmannsheil, Ruhr University Bochum, Bochum, Germany
| | - Ludwik K Branski
- Department of Surgery, Shriners Hospitals for Children-Galveston, University of Texas Medical Branch, Galveston, Texas, USA
| | - Frank Siemers
- Department of Plastic and Hand Surgery, Burn Unit, Trauma Center Bergmannstrost Halle, Halle, Germany
| | - Gerrit Grieb
- Department of Plastic Surgery and Hand Surgery, Gemeinschaftskrankenhaus Havelhoehe, Teaching Hospital of the Charité Berlin, Berlin, Germany
| | - Marcus Lehnhardt
- Department of Plastic Surgery, BG University Hospital Bergmannsheil, Ruhr University Bochum, Bochum, Germany
| | - Amir S Yazdi
- Department of Dermatology and Allergology, University Hospital Aachen, Aachen, Germany
| | - Zeshaan N Maan
- Division of Plastic and Reconstructive Surgery, Department of Surgery, Stanford School of Medicine, Stanford, California, USA
| | - Dominik Duscher
- Department of Plastic Surgery and Hand Surgery, Technical University Munich, Munich, Germany,
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Yang L, Xie P, Wu J, Yu J, Li X, Ma H, Yu T, Wang H, Ye J, Wang J, Zheng H. Deferoxamine Treatment Combined With Sevoflurane Postconditioning Attenuates Myocardial Ischemia-Reperfusion Injury by Restoring HIF-1/BNIP3-Mediated Mitochondrial Autophagy in GK Rats. Front Pharmacol 2020; 11:6. [PMID: 32140105 PMCID: PMC7042377 DOI: 10.3389/fphar.2020.00006] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2019] [Accepted: 01/03/2020] [Indexed: 12/14/2022] Open
Abstract
Mitochondrial autophagy is involved in myocardial protection of sevoflurane postconditioning (SPostC) and in diabetic state this protective effect is weakened due to impaired HIF-1 signaling pathway. Previous studies have proved that deferoxamine (DFO) could activate impaired HIF-1α in diabetic state to restore the cardioprotective of sevoflurane, while the specific mechanism is unclear. This study aims to investigate whether HIF-1/BNIP3-mediated mitochondrial autophagy is involved in the restoration of sevoflurane postconditioning cardioprotection in diabetic state. Ischemia/reperfusion (I/R) model was established by ligating the anterior descending coronary artery and sevoflurane was administered at the first 15 min of reperfusion. Myocardial infarct size, mitochondrial ultrastructure and autophagosome, ATP content, mitochondrial membrane potential, ROS production, HIF-1α, BNIP3, LC3B-II, Beclin-1, P62, LAMP2 protein expression were detected 2 h after reperfusion, and cardiac function was evaluated by ultrasound at 24 h after reperfusion. Our results showed that with DFO treatment, SPostC up-regulated the expression of HIF-1α and BNIP3, thus reduced the expression of key autophagy proteins LC3B-II, Beclin-1, p62, and increased the expression of LAMP2. Furthermore, it reduced the accumulation of autophagosomes and ROS production, increased the content of ATP, and stabilized the membrane potential. Finally, the myocardial infarction size was reduced and cardiac function was improved. Taken together, DFO treatment combined with SPostC could alleviate myocardial ischemia reperfusion injury in diabetic rats by restoring and promoting HIF-1/BNIP3-mediated mitochondrial autophagy.
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Affiliation(s)
- Long Yang
- Department of Anesthesiology, The First Affiliated Hospital of Xinjiang Medical University, Urumqi, China
| | - Peng Xie
- Guizhou Key Laboratory of Anesthesia and Organ Protection, Department of Anesthesiology, Zunyi Medical College, Zunyi, China
| | - Jianjiang Wu
- Department of Anesthesiology, The First Affiliated Hospital of Xinjiang Medical University, Urumqi, China
| | - Jin Yu
- Department of Anesthesiology, Chongqing Health Center for Women and Children, Chongqing, China
| | - Xin Li
- Department of Anesthesiology, The First Affiliated Hospital of Xinjiang Medical University, Urumqi, China
| | - Haiping Ma
- Department of Anesthesiology, The First Affiliated Hospital of Xinjiang Medical University, Urumqi, China
| | - Tian Yu
- Guizhou Key Laboratory of Anesthesia and Organ Protection, Department of Anesthesiology, Zunyi Medical College, Zunyi, China
| | - Haiying Wang
- Guizhou Key Laboratory of Anesthesia and Organ Protection, Department of Anesthesiology, Zunyi Medical College, Zunyi, China
| | - Jianrong Ye
- Department of Anesthesiology, The First Affiliated Hospital of Xinjiang Medical University, Urumqi, China
| | - Jiang Wang
- Department of Anesthesiology, The First Affiliated Hospital of Xinjiang Medical University, Urumqi, China
| | - Hong Zheng
- Department of Anesthesiology, The First Affiliated Hospital of Xinjiang Medical University, Urumqi, China
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Recipient-Site Preconditioning with Deferoxamine Increases Fat Graft Survival by Inducing VEGF and Neovascularization in a Rat Model. Plast Reconstr Surg 2020; 144:619e-629e. [PMID: 31568298 DOI: 10.1097/prs.0000000000006036] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
BACKGROUND The authors hypothesize that ischemic preconditioning of the recipient site with deferoxamine will increase fat graft survival by enhancing angiogenesis in a rat model. METHODS Cell viability, tube formation, and mRNA expression were measured in human umbilical vein endothelial cells treated with deferoxamine. A total of 36 rats were then used for an in vivo study. A dose of 100 mg/kg of deferoxamine was injected subcutaneously into the rat scalp every other day for five treatments. On the day after the final injection, the scalp skin was harvested from half the animals to evaluate the effects of deferoxamine on the recipient site. In the remaining animals, inguinal fat tissue was transplanted to the scalp. Eight weeks after transplantation, the grafts were harvested to evaluate the effects of deferoxamine preconditioning on fat graft survival. RESULTS In human umbilical vein endothelial cells, treatment with a deferoxamine concentration higher than 400 μM decreased cell viability compared with the control (p = 0.002). Treatment with 100 and 200 μM deferoxamine increased endothelial tube formation (p = 0.001) and mRNA levels of angiogenesis-related factors (p = 0.02). Rat scalps treated with deferoxamine exhibited increased capillary neoformation (p = 0.001) and vascular endothelial growth factor protein expression (p = 0.024) compared with controls. Fat graft volume retention, capillary density (p < 0.001), and adipocyte viability (p < 0.001) in the grafted fat increased when the recipient site was preconditioned with deferoxamine. CONCLUSION This study demonstrated that recipient site preconditioning with deferoxamine increases fat graft survival by inducing vascular endothelial growth factor and neovascularization.
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Diabetic Foot Ulcers: Current Advances in Antimicrobial Therapies and Emerging Treatments. Antibiotics (Basel) 2019; 8:antibiotics8040193. [PMID: 31652990 PMCID: PMC6963879 DOI: 10.3390/antibiotics8040193] [Citation(s) in RCA: 61] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2019] [Revised: 10/16/2019] [Accepted: 10/17/2019] [Indexed: 12/23/2022] Open
Abstract
Diabetic foot ulcers (DFUs) are very important diabetes-related lesions that can lead to serious physical consequences like amputations of limbs and equally severe social, psychological, and economic outcomes. It is reported that up to 25% of patients with diabetes develop a DFU in their lifetime, and more than half of them become infected. Therefore, it is essential to manage infection and ulcer recovery to prevent negatives outcomes. The available information plays a significant role in keeping both physicians and patients aware of the emerging therapies against DFUs. The purpose of this review is to compile the currently available approaches in the managing and treatment of DFUs, including molecular and regenerative medicine, antimicrobial and energy-based therapies, and the use of plant extracts, antimicrobial peptides, growth factors, ozone, devices, and nano-medicine, to offer an overview of the assessment of this condition.
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The Role of Deferoxamine in Irradiated Breast Reconstruction: A Study of Oncologic Safety. Plast Reconstr Surg 2019; 143:1666-1676. [PMID: 30907808 DOI: 10.1097/prs.0000000000005647] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
BACKGROUND Radiotherapy plays an essential role in the oncologic management of breast cancer. However, patients who undergo radiotherapy experience significantly more wound complications during the reconstructive process. Deferoxamine has immense potential to up-regulate angiogenesis and improve reconstructive outcomes. The purpose of this study was to determine the impact of deferoxamine on breast cancer cell proliferation in vitro, to delineate oncologic safety concerns regarding the use of deferoxamine as a regenerative therapeutic. METHODS The dose-dependent effect of radiation and deferoxamine on two triple-negative breast cancer cell lines (MDA-MB-231 and MDA-MB-468) was determined by means of MTS (percentage cell viability) and tumorsphere (sphere number) analysis. Radiation therapy and deferoxamine were delivered both individually and in combination, and all experiments were completed in triplicate. Intracellular iron, nuclear factor-κB localization, and apoptosis/necrosis assays were performed to delineate mechanism. Analysis of variance statistical analysis was performed using SPSS (p < 0.05). RESULTS For both cell lines, percentage viability and sphere number significantly decreased following exposure to 10 Gy of radiation. Surprisingly, the administration of 25 µM deferoxamine also significantly decreased each metric. The administration of deferoxamine (100 µM) in combination with radiation (10 Gy) resulted in significantly reduced percentage viability and sphere number compared with the administration of radiation alone. Deferoxamine treatment decreased intracellular iron, suppressed nuclear factor-κB activation, and induced apoptosis. CONCLUSION Radiation and deferoxamine significantly decrease breast cancer proliferation when delivered independently and in combination, suggesting deferoxamine may be safely used to facilitate improved reconstructive outcomes among triple-negative breast cancer survivors. CLINICAL QUESTION/LEVEL OF EVIDENCE Therapeutic, V.
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82
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Borrelli MR, Shen AH, Lee GK, Momeni A, Longaker MT, Wan DC. Radiation-Induced Skin Fibrosis: Pathogenesis, Current Treatment Options, and Emerging Therapeutics. Ann Plast Surg 2019; 83:S59-S64. [PMID: 31513068 PMCID: PMC6746243 DOI: 10.1097/sap.0000000000002098] [Citation(s) in RCA: 73] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Radiotherapy (RT) has become an indispensable part of oncologic treatment protocols for a range of malignancies. However, a serious adverse effect of RT is radiodermatitis; almost 95% of patients develop moderate to severe skin reactions following radiation treatment. In the acute setting, these can be erythema, desquamation, ulceration, and pain. Chronically, soft tissue atrophy, alopecia, and stiffness can be noted. Radiodermatitis can delay oncologic treatment protocols and significantly impair quality of life. There is currently a paucity of effective treatment options and prevention strategies for radiodermatitis. Importantly, recent preclinical and clinical studies have suggested that fat grafting may be of therapeutic benefit, reversing detrimental changes to soft tissue following RT. This review outlines the damaging effects of RT on the skin and soft tissue as well as discusses available treatment options for radiodermatitis. Emerging strategies to mitigate detrimental, chronic radiation-induced changes are also presented.
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Affiliation(s)
- Mimi R. Borrelli
- Hagey Laboratory for Pediatric Regenerative Medicine, Department of Surgery, Division of Plastic Surgery, Stanford University School of Medicine, Stanford, California
| | - Abra H. Shen
- Hagey Laboratory for Pediatric Regenerative Medicine, Department of Surgery, Division of Plastic Surgery, Stanford University School of Medicine, Stanford, California
| | - Gordon K. Lee
- Division of Plastic and Reconstructive Surgery, Stanford University Medical Center, Palo Alto, California
| | - Arash Momeni
- Division of Plastic and Reconstructive Surgery, Stanford University Medical Center, Palo Alto, California
| | - Michael T. Longaker
- Hagey Laboratory for Pediatric Regenerative Medicine, Department of Surgery, Division of Plastic Surgery, Stanford University School of Medicine, Stanford, California
- Institute for Stem Cell Biology and Regenerative Medicine, Stanford University School of Medicine, Stanford, California
| | - Derrick C. Wan
- Hagey Laboratory for Pediatric Regenerative Medicine, Department of Surgery, Division of Plastic Surgery, Stanford University School of Medicine, Stanford, California
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84
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Kumar B, Noor N, Thakur S, Pan N, Narayana H, Yan SC, Wang F, Shah P. Shape Memory Polyurethane-Based Smart Polymer Substrates for Physiologically Responsive, Dynamic Pressure (Re)Distribution. ACS OMEGA 2019; 4:15348-15358. [PMID: 31572833 PMCID: PMC6761750 DOI: 10.1021/acsomega.9b01167] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/23/2019] [Accepted: 09/02/2019] [Indexed: 06/10/2023]
Abstract
Shape memory polymers (SMPs) are an exciting class of stimuli-responsive smart materials that demonstrate reactive and reversible changes in mechanical property, usually by switching between different states due to external stimuli. We report on the development of a polyurethane-based SMP foam for effective pressure redistribution that demonstrates controllable changes in dynamic pressure redistribution capability at a low transition temperature (∼24 °C)-ideally suited to matching modulations in body contact pressure for dynamic pressure relief (e.g., for alleviation or pressure ulcer effects). The resultant SMP material has been extensively characterized by a series of tests including stress-strain testing, compression testing, dynamic mechanical analysis, optical microscopy, UV-visible absorbance spectroscopy, variable-temperature areal pressure distribution, Fourier transform infrared spectroscopy, Raman spectroscopy, X-ray diffraction, differential scanning calorimetry, dynamic thermogravimetric analysis, and 1H nuclear magnetic resonance spectroscopy. The foam system exhibits high responsivity when tested for plantar pressure modulation with significant potential in pressure ulcers treatment. Efficient pressure redistribution (∼80% reduction in interface pressure), high stress response (∼30% applied stress is stored in fixity and released on recovery), and excellent deformation recovery (∼100%) are demonstrated in addition to significant cycling ability without performance loss. By providing highly effective pressure redistribution and modulation when in contact with the body's surface, this SMP foam offers novel mechanisms for alleviating the risk of pressure ulcers.
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Affiliation(s)
- Bipin Kumar
- Department of Textile Technology, Indian
Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
| | - Nuruzzaman Noor
- Institute of Textiles and Clothing, University Research
Facility in Chemical and Environmental Analysis, and School of Design, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong SAR, China
| | - Suman Thakur
- Institute of Textiles and Clothing, University Research
Facility in Chemical and Environmental Analysis, and School of Design, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong SAR, China
| | - Ning Pan
- Biological & Agricultural Engineering, UC Davis, Davis, California 95616, United States
| | - Harishkumar Narayana
- Institute of Textiles and Clothing, University Research
Facility in Chemical and Environmental Analysis, and School of Design, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong SAR, China
| | - Siu-cheong Yan
- Institute of Textiles and Clothing, University Research
Facility in Chemical and Environmental Analysis, and School of Design, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong SAR, China
| | - Faming Wang
- Institute of Textiles and Clothing, University Research
Facility in Chemical and Environmental Analysis, and School of Design, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong SAR, China
| | - Parth Shah
- Institute of Textiles and Clothing, University Research
Facility in Chemical and Environmental Analysis, and School of Design, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong SAR, China
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Holden P, Nair LS. Deferoxamine: An Angiogenic and Antioxidant Molecule for Tissue Regeneration. TISSUE ENGINEERING PART B-REVIEWS 2019; 25:461-470. [PMID: 31184273 DOI: 10.1089/ten.teb.2019.0111] [Citation(s) in RCA: 53] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Deferoxamine (DFO) has been in use for half a century as a Food and Drug Administration-approved iron chelator, but recent studies indicate a variety of properties that could expand this drug's application into the fields of tissue and regenerative engineering. DFO has been implicated as an angiogenic agent in studies on ischemia, wound healing, and bone regeneration because of its ability to upregulate hypoxia-inducible factor-1 alpha (HIF-1α) and other key downstream angiogenic factors. DFO has also demonstrated antioxidant capabilities unrelated to its iron-chelating properties, making it a potential modulator of the oxidative stress involved in the inflammation response. Together, these properties make DFO a potential bioactive molecule to promote wound healing and enhance tissue integration of biomaterials in vivo. Impact Statement Deferoxamine (DFO) is approved by the Food and Drug Administration as an iron chelator and is been used to treat iron overload. Recent studies indicate that DFO may have important applications in the growing field of tissue regeneration because of its unique properties of downregulating inflammation while promoting vascularization, thereby enhancing wound healing in vivo.
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Affiliation(s)
- Paige Holden
- The Connecticut Convergence Institute for Translation in Regenerative Engineering, University of Connecticut Health Center, Farmington, Connecticut.,Department of Biomedical Engineering, University of Connecticut, Storrs, Connecticut
| | - Lakshmi S Nair
- The Connecticut Convergence Institute for Translation in Regenerative Engineering, University of Connecticut Health Center, Farmington, Connecticut.,Department of Biomedical Engineering, University of Connecticut, Storrs, Connecticut.,Department of Orthopaedic Surgery, University of Connecticut Health Center, Farmington, Connecticut.,Department of Material Science and Engineering, Institute of Material Science, University of Connecticut, Storrs, Connecticut
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86
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Stephens CJ, Spector JA, Butcher JT. Biofabrication of thick vascularized neo-pedicle flaps for reconstructive surgery. Transl Res 2019; 211:84-122. [PMID: 31170376 PMCID: PMC6702068 DOI: 10.1016/j.trsl.2019.05.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/23/2019] [Revised: 05/06/2019] [Accepted: 05/14/2019] [Indexed: 01/01/2023]
Abstract
Wound chronicity due to intrinsic and extrinsic factors perturbs adequate lesion closure and reestablishment of the protective skin barrier. Immediate and proper care of chronic wounds is necessary for a swift recovery and a reduction of patient vulnerability to infection. Advanced therapies supplemented with standard wound care procedures have been clinically implemented to restore aberrant tissue; however, these treatments are ineffective if local vasculature is too compromised to support minimally-invasive strategies. Autologous "flaps", which are tissues equipped with their own hierarchical vascular supply, can be harvested from one region of the patient and transplanted to the wound where it is reperfused upon microsurgical anastomosis to appropriate recipient vessels. Despite the success of autologous flap transfer, these procedures are extremely invasive, incur obligatory donor-site morbidity, and require sufficient donor-tissue availability, microsurgical expertise, and specialized equipment. 3D-bioprinting modalities, such as extrusion-based bioprinting, can be used to address the clinical constraints of autologous flap transfer, primarily addressing donor-site morbidity and tissue availability. This advancement in regenerative medicine allows the biofabrication of heterogeneous tissue structures with high shape fidelity and spatial resolution to generate biomimetic constructs with the anatomically-precise geometries of native tissue to ensure tissue-specific function. Yet, meaningful progress toward this clinical application has been limited by the lack of vascularization required to meet the nutrient and oxygen demands of clinically relevant tissue volumes. Thus, various criteria for the fabrication of functional tissues with hierarchical, patent vasculature must be considered when implementing 3D-bioprinting technologies for deep, chronic wounds.
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Affiliation(s)
- Chelsea J Stephens
- Nancy E. and Peter C. Meinig School of Biomedical Engineering, Cornell University, Ithaca, New York
| | - Jason A Spector
- Nancy E. and Peter C. Meinig School of Biomedical Engineering, Cornell University, Ithaca, New York; Division of Plastic Surgery, Weill Cornell Medical College, New York, New York
| | - Jonathan T Butcher
- Nancy E. and Peter C. Meinig School of Biomedical Engineering, Cornell University, Ithaca, New York.
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87
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Dalisson B, Barralet J. Bioinorganics and Wound Healing. Adv Healthc Mater 2019; 8:e1900764. [PMID: 31402608 DOI: 10.1002/adhm.201900764] [Citation(s) in RCA: 62] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2019] [Revised: 07/19/2019] [Indexed: 12/18/2022]
Abstract
Wound dressings and the healing enhancement (increasing healing speed and quality) are two components of wound care that lead to a proper healing. Wound care today consists mostly of providing an optimal environment by removing waste and necrotic tissues from a wound, preventing infections, and keeping the wounds adequately moist. This is however often not enough to re-establish the healing process in chronic wounds; with the local disruption of vascularization, the local environment is lacking oxygen, nutrients, and has a modified ionic and molecular concentration which limits the healing process. This disruption may affect cellular ionic pumps, energy production, chemotaxis, etc., and will affect the healing process. Biomaterials for wound healing range from simple absorbents to sophisticated bioactive delivery vehicles. Often placing a material in or on a wound can change multiple parameters such as pH, ionic concentration, and osmolarity, and it can be challenging to pinpoint key mechanism of action. This article reviews the literature of several inorganic ions and molecules and their potential effects on the different wound healing phases and their use in new wound dressings.
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Affiliation(s)
| | - Jake Barralet
- Faculty of DentistryMcGill University Montreal H3A 1G1 QC Canada
- Division of OrthopaedicsDepartment of SurgeryFaculty of MedicineMcGill University Montreal H4A 0A9 QC Canada
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88
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Duscher D, Trotsyuk AA, Maan ZN, Kwon SH, Rodrigues M, Engel K, Stern-Buchbinder ZA, Bonham CA, Barrera J, Whittam AJ, Hu MS, Inayathullah M, Rajadas J, Gurtner GC. Optimization of transdermal deferoxamine leads to enhanced efficacy in healing skin wounds. J Control Release 2019; 308:232-239. [PMID: 31299261 DOI: 10.1016/j.jconrel.2019.07.009] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2019] [Revised: 06/07/2019] [Accepted: 07/08/2019] [Indexed: 12/30/2022]
Abstract
Chronic wounds remain a significant burden to both the healthcare system and individual patients, indicating an urgent need for new interventions. Deferoxamine (DFO), an iron-chelating agent clinically used to treat iron toxicity, has been shown to reduce oxidative stress and increase hypoxia-inducible factor-1 alpha (HIF-1α) activation, thereby promoting neovascularization and enhancing regeneration in chronic wounds. However due to its short half-life and adverse side effects associated with systemic absorption, there is a pressing need for targeted DFO delivery. We recently published a preclinical proof of concept drug delivery system (TDDS) which showed that transdermally applied DFO is effective in improving chronic wound healing. Here we present an enhanced TDDS (eTDDS) comprised exclusively of FDA-compliant constituents to optimize drug release and expedite clinical translation. We evaluate the eTDDS to the original TDDS and compare this with other commonly used delivery methods including DFO drip-on and polymer spray applications. The eTDDS displayed excellent physicochemical characteristics and markedly improved DFO delivery into human skin when compared to other topical application techniques. We demonstrate an accelerated wound healing response with the eTDDS treatment resulting in significantly increased wound vascularity, dermal thickness, collagen deposition and tensile strength. Together, these findings highlight the immediate clinical potential of DFO eTDDS to treating diabetic wounds. Further, the topical drug delivery platform has important implications for targeted pharmacologic therapy of a wide range of cutaneous diseases.
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Affiliation(s)
- Dominik Duscher
- Hagey Laboratory for Pediatric Regenerative Medicine, Division of Plastic and Reconstructive Surgery, Department of Surgery, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Artem A Trotsyuk
- Hagey Laboratory for Pediatric Regenerative Medicine, Division of Plastic and Reconstructive Surgery, Department of Surgery, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Zeshaan N Maan
- Hagey Laboratory for Pediatric Regenerative Medicine, Division of Plastic and Reconstructive Surgery, Department of Surgery, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Sun Hyung Kwon
- Hagey Laboratory for Pediatric Regenerative Medicine, Division of Plastic and Reconstructive Surgery, Department of Surgery, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Melanie Rodrigues
- Hagey Laboratory for Pediatric Regenerative Medicine, Division of Plastic and Reconstructive Surgery, Department of Surgery, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Karl Engel
- Hagey Laboratory for Pediatric Regenerative Medicine, Division of Plastic and Reconstructive Surgery, Department of Surgery, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Zachary A Stern-Buchbinder
- Hagey Laboratory for Pediatric Regenerative Medicine, Division of Plastic and Reconstructive Surgery, Department of Surgery, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Clark A Bonham
- Hagey Laboratory for Pediatric Regenerative Medicine, Division of Plastic and Reconstructive Surgery, Department of Surgery, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Janos Barrera
- Hagey Laboratory for Pediatric Regenerative Medicine, Division of Plastic and Reconstructive Surgery, Department of Surgery, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Alexander J Whittam
- Hagey Laboratory for Pediatric Regenerative Medicine, Division of Plastic and Reconstructive Surgery, Department of Surgery, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Michael S Hu
- Hagey Laboratory for Pediatric Regenerative Medicine, Division of Plastic and Reconstructive Surgery, Department of Surgery, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Mohammed Inayathullah
- Biomaterials and Advanced Drug Delivery Laboratory, Stanford University School of Medicine, Stanford, CA 94304, USA
| | - Jayakumar Rajadas
- Biomaterials and Advanced Drug Delivery Laboratory, Stanford University School of Medicine, Stanford, CA 94304, USA
| | - Geoffrey C Gurtner
- Hagey Laboratory for Pediatric Regenerative Medicine, Division of Plastic and Reconstructive Surgery, Department of Surgery, Stanford University School of Medicine, Stanford, CA 94305, USA.
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89
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Ding Z, Zhou M, Zhou Z, Zhang W, Jiang X, Lu X, Zuo B, Lu Q, Kaplan DL. Injectable Silk Nanofiber Hydrogels for Sustained Release of Small-Molecule Drugs and Vascularization. ACS Biomater Sci Eng 2019; 5:4077-4088. [PMID: 33448809 DOI: 10.1021/acsbiomaterials.9b00621] [Citation(s) in RCA: 55] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Strategies to control neovascularization in damaged tissues remain a key issue in regenerative medicine. Unlike most reported desferrioxamine (DFO)-loaded systems where DFO demonstrates a burst release, here we attain zero-order release behavior above 40 days. This outcome was achieved by blending DFO with silk nanofibers with special hydrophilic-hydrophobic properties. The special silk nanofibers showed strong physical binding capacity with DFO, avoiding chemical cross-linking. Using these new biomaterials in vivo in a rat wound model suggested that the DFO-loaded silk nanofiber hydrogel systems stimulated angiogenesis by the sustained release of DFO, but also facilitated cell migration and tissue ingrowth. These features resulted in faster formation of a blood vessel network in the wounds, as well improved healing when compared to the free DFO system. The DFO-loaded systems are also suitable for the regeneration of other tissues, such as nerve and bone, suggesting universality in the biomedical field.
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Affiliation(s)
| | - Mingliang Zhou
- Department of Prosthodontics, Oral Bioengineering and Regenerative Medicine Lab, Shanghai Key Laboratory of Stomatology, Ninth People's Hospital Affiliated to Shanghai JiaoTong University, School of Medicine, 639 Zhizaoju Road, Shanghai 200011, China
| | | | - Wenjie Zhang
- Department of Prosthodontics, Oral Bioengineering and Regenerative Medicine Lab, Shanghai Key Laboratory of Stomatology, Ninth People's Hospital Affiliated to Shanghai JiaoTong University, School of Medicine, 639 Zhizaoju Road, Shanghai 200011, China
| | - Xinquan Jiang
- Department of Prosthodontics, Oral Bioengineering and Regenerative Medicine Lab, Shanghai Key Laboratory of Stomatology, Ninth People's Hospital Affiliated to Shanghai JiaoTong University, School of Medicine, 639 Zhizaoju Road, Shanghai 200011, China
| | | | | | | | - David L Kaplan
- Department of Biomedical Engineering, Tufts University, Medford, Massachusetts 02155, United States
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90
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Lecithin-based deferoxamine nanoparticles accelerated cutaneous wound healing in diabetic rats. Eur J Pharmacol 2019; 858:172478. [PMID: 31228457 DOI: 10.1016/j.ejphar.2019.172478] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2019] [Revised: 06/16/2019] [Accepted: 06/18/2019] [Indexed: 02/06/2023]
Abstract
Nanoparticles have higher frequency of being exposed to cells or tissue, and are thus more likely to gain access into cytoplasm or nuclei to modulate molecular events due to significantly larger surface area to volume ratio. As a result, they present amplified response or even different physiochemical and biomedical properties from bigger particles. Deferoxamine accelerates wound healing in diabetic rats by increased neovascularization, reduced inflammation and improved maturation of wound. We investigated the wound healing potential of deferoxamine-nanoparticles in diabetic rats. Lecithin based nanoparticles of deferoxamine were prepared and characterized. The diabetic rats were divided into five Groups, of which Group I was treated with pluronic-gel f-127 (25%), Group II with deferoxamine 0.1% and Group III, IV and V were treated with deferoxamine-nanoparticles incorporated in pluronic-gel f-127 25% at 0.03% (0.01% deferoxamine), 0.1% (0.03% deferoxamine) and 0.3% (0.1% deferoxamine) w/v respectively. The wound closure was significantly accelerated in group V as compared to control groups. HIF-1α, VEGF, SDF-1α, TGF-β1, and IL-10 protein levels were significantly higher in group V. The collagen deposition and neovascularization was greater in deferoxamine-nanoparticle treated rats. In contrast, TNF-α level was lowest in group V. In summary, the deferoxamine-nanoparticle formulation we developed, when applied topically on diabetic wounds results in faster wound healing as compared to simple deferoxamine formulation. This formulation may prove to be an effective therapy for treatment of diabetic wounds.
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91
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Lam GC, Sefton MV. Hypoxia-Inducible Factor Drives Vascularization of Modularly Assembled Engineered Tissue. Tissue Eng Part A 2019; 25:1127-1136. [PMID: 30585759 DOI: 10.1089/ten.tea.2018.0294] [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] [Indexed: 01/10/2023] Open
Abstract
IMPACT STATEMENT Using two inhibitory methods, we demonstrated that hypoxia-inducible factor (HIF) plays an important role in vascularizing and oxygenating modularly-assembled engineered tissues. Each inhibitory technique elucidated a different mechanism by which this occurred. Whereas systemic inhibition negatively impacted early recruitment of host-derived cells, genetic inhibition in grafted endothelial cells was detrimental to their survival. Taken together, our study suggests that methods of HIF-mediated mechanisms could be harnessed to tune the extent and rate of vascularization in engineered tissue constructs.
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Affiliation(s)
- Gabrielle C Lam
- 1Institute of Biomaterials and Biomedical Engineering, University of Toronto, Toronto, Canada
| | - Michael V Sefton
- 1Institute of Biomaterials and Biomedical Engineering, University of Toronto, Toronto, Canada.,2Department of Chemical Engineering and Applied Chemistry, University of Toronto, Toronto, Canada
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92
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Cho H, Blatchley MR, Duh EJ, Gerecht S. Acellular and cellular approaches to improve diabetic wound healing. Adv Drug Deliv Rev 2019; 146:267-288. [PMID: 30075168 DOI: 10.1016/j.addr.2018.07.019] [Citation(s) in RCA: 123] [Impact Index Per Article: 24.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2017] [Revised: 07/23/2018] [Accepted: 07/30/2018] [Indexed: 02/06/2023]
Abstract
Chronic diabetic wounds represent a huge socioeconomic burden for both affected individuals and the entire healthcare system. Although the number of available treatment options as well as our understanding of wound healing mechanisms associated with diabetes has vastly improved over the past decades, there still remains a great need for additional therapeutic options. Tissue engineering and regenerative medicine approaches provide great advantages over conventional treatment options, which are mainly aimed at wound closure rather than addressing the underlying pathophysiology of diabetic wounds. Recent advances in biomaterials and stem cell research presented in this review provide novel ways to tackle different molecular and cellular culprits responsible for chronic and nonhealing wounds by delivering therapeutic agents in direct or indirect ways. Careful integration of different approaches presented in the current article could lead to the development of new therapeutic platforms that can address multiple pathophysiologic abnormalities and facilitate wound healing in patients with diabetes.
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Affiliation(s)
- Hongkwan Cho
- Wilmer Ophthalmologic Institute, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Michael R Blatchley
- Department of Biomedical Engineering, Johns Hopkins University, Baltimore, MD, USA; Department of Chemical and Biomolecular Engineering, Institute for NanoBioTechnology, Johns Hopkins University Baltimore, MD, USA
| | - Elia J Duh
- Wilmer Ophthalmologic Institute, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Sharon Gerecht
- Department of Chemical and Biomolecular Engineering, Institute for NanoBioTechnology, Johns Hopkins University Baltimore, MD, USA.
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93
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Veith AP, Henderson K, Spencer A, Sligar AD, Baker AB. Therapeutic strategies for enhancing angiogenesis in wound healing. Adv Drug Deliv Rev 2019; 146:97-125. [PMID: 30267742 DOI: 10.1016/j.addr.2018.09.010] [Citation(s) in RCA: 433] [Impact Index Per Article: 86.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2018] [Revised: 09/15/2018] [Accepted: 09/24/2018] [Indexed: 12/19/2022]
Abstract
The enhancement of wound healing has been a goal of medical practitioners for thousands of years. The development of chronic, non-healing wounds is a persistent medical problem that drives patient morbidity and increases healthcare costs. A key aspect of many non-healing wounds is the reduced presence of vessel growth through the process of angiogenesis. This review surveys the creation of new treatments for healing cutaneous wounds through therapeutic angiogenesis. In particular, we discuss the challenges and advancement that have been made in delivering biologic, pharmaceutical and cell-based therapies as enhancers of wound vascularity and healing.
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94
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Implantable hyaluronic acid-deferoxamine conjugate prevents nonunions through stimulation of neovascularization. NPJ Regen Med 2019; 4:11. [PMID: 31123600 PMCID: PMC6529413 DOI: 10.1038/s41536-019-0072-9] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2018] [Accepted: 04/08/2019] [Indexed: 01/05/2023] Open
Abstract
Approximately 6.3 million fractures occur in the U.S. annually, with 5–10% resulting in debilitating nonunions. A major limitation to achieving successful bony union is impaired neovascularization. To augment fracture healing, we designed an implantable drug delivery technology containing the angiogenic stimulant, deferoxamine (DFO). DFO activates new blood vessel formation through iron chelation and upregulation of the HIF-1α pathway. However, due to its short half-life and rapid clearance, maintaining DFO at the callus site during peak fracture angiogenesis has remained challenging. To overcome these limitations, we composed an implantable formulation of DFO conjugated to hyaluronic acid (HA). This compound immobilizes DFO within the fracture callus throughout the angiogenic window, making it a high-capacity iron sponge that amplifies blood vessel formation and prevents nonunions. We investigated implanted HA-DFO’s capacity to facilitate fracture healing in the irradiated rat mandible, a model whereby nonunions routinely develop secondary to obliteration of vascularity. HA-DFO implantation significantly improved radiomorphometrics and metrics of biomechanical strength. In addition, HA-DFO treated mandibles exhibited a remarkable 91% bone union rate, representing a 3.5-fold improvement over non-treated/irradiated controls (20% bone union rate). Collectively, our work proposes a unique methodology for the targeted delivery of DFO to fracture sites in order to facilitate neovascularization. If these findings are successfully translated into clinical practice, millions of patients will benefit from the prevention of nonunions.
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95
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Chen B, Sun Y, Zhang J, Zhu Q, Yang Y, Niu X, Deng Z, Li Q, Wang Y. Human embryonic stem cell-derived exosomes promote pressure ulcer healing in aged mice by rejuvenating senescent endothelial cells. Stem Cell Res Ther 2019; 10:142. [PMID: 31113469 PMCID: PMC6528288 DOI: 10.1186/s13287-019-1253-6] [Citation(s) in RCA: 108] [Impact Index Per Article: 21.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2019] [Revised: 04/19/2019] [Accepted: 05/01/2019] [Indexed: 12/14/2022] Open
Abstract
Background Angiogenesis, as an endogenous repair mechanism, plays crucial roles in wound healing and tissue regeneration. However, this process is impaired in the elderly due to aging-related vascular endothelial dysfunction. This study was aimed to explore the pro-angiogenic effects of exosomes from human embryonic stem cells (ESC-Exos) in aged mice of pressure-induced ulcer model and the underlying mechanism. Methods Pressure ulcer wounds were created on the back of d-galactose-induced aging mice. ESC-Exos were locally applied onto the wound beds, with PBS as control. The effects of ESC-Exos on wound healing were analyzed by measuring wound closure rates, histological and immunofluorescence analyses. Then, the anti-aging effect of ESC-Exos on vascular endothelial cells was tested in an in vitro d-galactose-induced HUVEC senescence model. Results ESC-Exos could accelerate wound closure and enhance angiogenesis, and the senescence of vascular endothelial cells was significantly ameliorated after ESC-Exos treatment. In vitro, ESC-Exos could rejuvenate the senescence of endothelial cells and recover compromised proliferation, migratory capacity, and tube formation. This recovery was Nrf2-activation-dependent, since cotreatment with Nrf2 inhibitor Brusatol could abolish the rejuvenative effects of ESC-Exos. Further study revealed that miR-200a was highly enriched in ESC-Exos and played a crucial role in ESC-Exos-mediated rejuvenation through downregulating Keap1, which negatively regulates Nrf2 expression. Conclusions ESC-Exos ameliorate endothelial senescence by activating Nrf2 and recover aging-related angiogenic dysfunction, thereby accelerating wound healing in aged mice. ESC-Exos might be a natural nano-biomaterial for aging-related diseases therapy. Electronic supplementary material The online version of this article (10.1186/s13287-019-1253-6) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Bi Chen
- Department of Orthopedic Surgery, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, 200233, China
| | - Yongjin Sun
- Department of Orthopedic Surgery, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, 200233, China
| | - Juntao Zhang
- Institute of Microsurgery on Extremities, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, 200233, China
| | - Qingwei Zhu
- Department of Neurosurgery, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, 200233, China
| | - Yunlong Yang
- Institute of Microsurgery on Extremities, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, 200233, China
| | - Xin Niu
- Institute of Microsurgery on Extremities, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, 200233, China
| | - Zhifeng Deng
- Department of Neurosurgery, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, 200233, China
| | - Qing Li
- Institute of Microsurgery on Extremities, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, 200233, China.
| | - Yang Wang
- Institute of Microsurgery on Extremities, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, 200233, China.
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96
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Seonwoo H, Kim SW, Shin B, Jang KJ, Lee M, Choo OS, Choi MJ, Kim J, Lim KT, Jang JH, Chung JH, Choung YH. Latent stem cell-stimulating therapy for regeneration of chronic tympanic membrane perforations using IGFBP2-releasing chitosan patch scaffolds. J Biomater Appl 2019; 34:198-207. [PMID: 31060420 DOI: 10.1177/0885328219845082] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Hoon Seonwoo
- 1 Department of Industrial Machinery Engineering, College of Life Sciences and Natural Resources, Sunchon National University, Suncheon, Republic of Korea
| | - Seung Won Kim
- 2 Department of Burns and Plastic Surgery, Affiliated Hospital of Yanbian University, Yanji, Jilin, P. R. China
| | - Beomyong Shin
- 3 Department of Biomedical Sciences, BK21 Plus Research Center for Biomedical Sciences, Ajou University Graduate School of Medicine, Suwon, Republic of Korea
| | - Kyoung-Je Jang
- 4 Department of Biosystems & Biomaterials Science and Engineering, Seoul National University, Seoul, Republic of Korea
| | - Myungchul Lee
- 4 Department of Biosystems & Biomaterials Science and Engineering, Seoul National University, Seoul, Republic of Korea
| | - Oak-Sung Choo
- 5 Department of Otolaryngology, Ajou University School of Medicine, Suwon, Republic of Korea.,6 Department of Medical Sciences, Ajou University Graduate School of Medicine, Suwon, Republic of Korea
| | - Mi-Jin Choi
- 3 Department of Biomedical Sciences, BK21 Plus Research Center for Biomedical Sciences, Ajou University Graduate School of Medicine, Suwon, Republic of Korea
| | - Jangho Kim
- 7 Department of Rural and Biosystems Engineering, Chonnam National University, Gwangju, Republic of Korea
| | - Ki-Taek Lim
- 8 Department of Biosystems Engineering, College of Agricultural and Life Sciences, Kangwon National University, Chuncheon, Republic of Korea
| | - Jeong Hun Jang
- 5 Department of Otolaryngology, Ajou University School of Medicine, Suwon, Republic of Korea
| | - Jong Hoon Chung
- 4 Department of Biosystems & Biomaterials Science and Engineering, Seoul National University, Seoul, Republic of Korea.,9 Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul, Republic of Korea
| | - Yun-Hoon Choung
- 3 Department of Biomedical Sciences, BK21 Plus Research Center for Biomedical Sciences, Ajou University Graduate School of Medicine, Suwon, Republic of Korea.,5 Department of Otolaryngology, Ajou University School of Medicine, Suwon, Republic of Korea.,6 Department of Medical Sciences, Ajou University Graduate School of Medicine, Suwon, Republic of Korea
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A Multifunctional Wearable Device with a Graphene/Silver Nanowire Nanocomposite for Highly Sensitive Strain Sensing and Drug Delivery. C — JOURNAL OF CARBON RESEARCH 2019. [DOI: 10.3390/c5020017] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Advances in wearable, highly sensitive and multifunctional strain sensors open up new opportunities for the development of wearable human interface devices for various applications such as health monitoring, smart robotics and wearable therapy. Herein, we present a simple and cost-effective method to fabricate a multifunctional strain sensor consisting of a skin-mountable dry adhesive substrate, a robust sensing component and a transdermal drug delivery system. The sensor has high piezoresisitivity to monitor real-time signals from finger bending to ulnar pulse. A transdermal drug delivery system consisting of polylactic-co-glycolic acid nanoparticles and a chitosan matrix is integrated into the sensor and is able to release the nanoparticles into the stratum corneum at a depth of ~60 µm. Our approach to the design of multifunctional strain sensors will lead to the development of cost-effective and well-integrated multifunctional wearable devices.
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98
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Discussion: Perioperative Treatment with a Prolyl Hydroxylase Inhibitor Reduces Necrosis in a Rat Ischemic Skin Flap Model. Plast Reconstr Surg 2019; 143:780e-781e. [PMID: 30921128 DOI: 10.1097/prs.0000000000005442] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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99
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Wu H, Li F, Shao W, Gao J, Ling D. Promoting Angiogenesis in Oxidative Diabetic Wound Microenvironment Using a Nanozyme-Reinforced Self-Protecting Hydrogel. ACS CENTRAL SCIENCE 2019; 5:477-485. [PMID: 30937375 PMCID: PMC6439452 DOI: 10.1021/acscentsci.8b00850] [Citation(s) in RCA: 169] [Impact Index Per Article: 33.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/18/2018] [Indexed: 05/02/2023]
Abstract
Impaired diabetic wound healing represents a devastating and rapidly growing clinical problem associated with high morbidity, mortality, and recurrence rates. Engineering therapeutic angiogenesis in the wounded tissue is critical for successful wound healing. However, stimulating functional angiogenesis of the diabetic wound remains a great challenge, due to the oxidative damage and denaturation of bio-macromolecule-based angiogenic agents in the oxidative diabetic wound microenvironment. Here, we present a unique "seed-and-soil" strategy that circumvents the limitation by simultaneously reshaping the oxidative wound microenvironment into a proregenerative one (the "soil") and providing proangiogenic miRNA cues (the "seed") using an miRNA-impregnated, redox-modulatory ceria nanozyme-reinforced self-protecting hydrogel (PCN-miR/Col). The PCN-miR/Col not only reshapes the hostile oxidative wound microenvironment, but also ensures the structural integrity of the encapsulated proangiogenic miRNA in the oxidative microenvironment. Diabetic wounds treated with the PCN-miR/Col demonstrate a remarkably accelerated wound closure and enhanced quality of the healed wound as featured by highly ordered alignment of collagen fiber, skin appendage morphogenesis, functional new blood vessel growth, and oxygen saturation.
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Affiliation(s)
- Haibin Wu
- Institute
of Pharmaceutics, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, P. R. China
| | - Fangyuan Li
- Institute
of Pharmaceutics, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, P. R. China
- Hangzhou
Institute of Innovative Medicine, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310012, P. R.
China
| | - Wei Shao
- Institute
of Pharmaceutics, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, P. R. China
| | - Jianqing Gao
- Institute
of Pharmaceutics, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, P. R. China
- Dr.
Li Dak Sum & Yip Yio Chin Center for Stem Cell and Regenerative
Medicine, Zhejiang University, Hangzhou 310058, P. R. China
- E-mail:
| | - Daishun Ling
- Institute
of Pharmaceutics, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, P. R. China
- Hangzhou
Institute of Innovative Medicine, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310012, P. R.
China
- Key
Laboratory of Biomedical Engineering of the Ministry of Education,
College of Biomedical Engineering & Instrument Science, Zhejiang University, Hangzhou 310027, P. R.
China
- E-mail:
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Wlaschek M, Singh K, Sindrilaru A, Crisan D, Scharffetter-Kochanek K. Iron and iron-dependent reactive oxygen species in the regulation of macrophages and fibroblasts in non-healing chronic wounds. Free Radic Biol Med 2019; 133:262-275. [PMID: 30261274 DOI: 10.1016/j.freeradbiomed.2018.09.036] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/23/2018] [Revised: 09/20/2018] [Accepted: 09/21/2018] [Indexed: 02/06/2023]
Abstract
Chronic wounds pose a stern challenge to health care systems with growing incidence especially in the aged population. In the presence of increased iron concentrations, recruitment of monocytes from the circulation and activation towards ROS and RNS releasing M1 macrophages together with the persistence of senescent fibroblasts at the wound site are significantly enhanced. This unrestrained activation of pro-inflammatory macrophages and senescent fibroblasts has increasingly been acknowledged as main driver causing non-healing wounds. In a metaphor, macrophages act like stage directors of wound healing, resident fibroblasts constitute main actors and increased iron concentrations are decisive parts of the libretto, and - if dysregulated - are responsible for the development of non-healing wounds. This review will focus on recent cellular and molecular findings from chronic venous leg ulcers and diabetic non-healing wounds both constituting the most common pathologies often resulting in limb amputations of patients. This not only causes tremendous suffering and loss of life quality, but is also associated with an increase in mortality and a major socio-economic burden. Despite recent advances, the underlying molecular mechanisms are not completely understood. Overwhelming evidence shows that reactive oxygen species and the transition metal and trace element iron at pathological concentrations are crucially involved in a complex interplay between cells of different histogenetic origin and their extracellular niche environment. This interplay depends on a variety of cellular, non-cellular biochemical and cell biological mechanisms. Here, we will highlight recent progress in the field of iron-dependent regulation of macrophages and fibroblasts and related pathologies linked to non-healing chronic wounds.
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Affiliation(s)
- Meinhard Wlaschek
- Department of Dermatology and Allergic Diseases, Ulm University, 89081 Ulm, Germany.
| | - Karmveer Singh
- Department of Dermatology and Allergic Diseases, Ulm University, 89081 Ulm, Germany
| | - Anca Sindrilaru
- Department of Dermatology and Allergic Diseases, Ulm University, 89081 Ulm, Germany
| | - Diana Crisan
- Department of Dermatology and Allergic Diseases, Ulm University, 89081 Ulm, Germany
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