1
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Kellett SK, Masterson JC. Cellular metabolism and hypoxia interfacing with allergic diseases. J Leukoc Biol 2024; 116:335-348. [PMID: 38843075 DOI: 10.1093/jleuko/qiae126] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2023] [Revised: 04/24/2024] [Accepted: 06/05/2024] [Indexed: 07/27/2024] Open
Abstract
Allergic diseases display significant heterogeneity in their pathogenesis. Understanding the influencing factors, pathogenesis, and advancing new treatments for allergic diseases is becoming more and more vital as currently, prevalence continues to rise, and mechanisms of allergic diseases are not fully understood. The upregulation of the hypoxia response is linked to an elevated infiltration of activated inflammatory cells, accompanied by elevated metabolic requirements. An enhanced hypoxia response may potentially contribute to inflammation, remodeling, and the onset of allergic diseases. It has become increasingly clear that the process underlying immune and stromal cell activation during allergic sensitization requires well-tuned and dynamic changes in cellular metabolism. The purpose of this review is to examine current perspectives regarding metabolic dysfunction in allergic diseases. In the past decade, new technological platforms such as "omic" techniques have been applied, allowing for the identification of different biomarkers in multiple models ranging from altered lipid species content, increased nutrient transporters, and altered serum amino acids in various allergic diseases. Better understanding, recognition, and integration of these alterations would increase our knowledge of pathogenesis and potentially actuate a novel repertoire of targeted treatment approaches that regulate immune metabolic pathways.
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Affiliation(s)
- Shauna K Kellett
- Allergy, Inflammation & Remodelling Research Laboratory, Department of Biology, Maynooth University, Maynooth, W23 C2N1, County Kildare, Ireland
| | - Joanne C Masterson
- Allergy, Inflammation & Remodelling Research Laboratory, Department of Biology, Maynooth University, Maynooth, W23 C2N1, County Kildare, Ireland
- Gastrointestinal Eosinophilic Diseases Program, Department of Paediatrics, Digestive Health Institute, Children's Hospital Colorado, University of Colorado School of Medicine, Aurora, CO, United States
- Kathleen Lonsdale Institute for Human Health Research, Maynooth University, Maynooth, W23 C2N1, County Kildare, Ireland
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2
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Baravkar SB, Lu Y, Masoud AR, Zhao Q, He J, Hong S. Development of a Novel Covalently Bonded Conjugate of Caprylic Acid Tripeptide (Isoleucine-Leucine-Aspartic Acid) for Wound-Compatible and Injectable Hydrogel to Accelerate Healing. Biomolecules 2024; 14:94. [PMID: 38254694 PMCID: PMC10813153 DOI: 10.3390/biom14010094] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2023] [Revised: 01/07/2024] [Accepted: 01/08/2024] [Indexed: 01/24/2024] Open
Abstract
Third-degree burn injuries pose a significant health threat. Safer, easier-to-use, and more effective techniques are urgently needed for their treatment. We hypothesized that covalently bonded conjugates of fatty acids and tripeptides can form wound-compatible hydrogels that can accelerate healing. We first designed conjugated structures as fatty acid-aminoacid1-amonoacid2-aspartate amphiphiles (Cn acid-AA1-AA2-D), which were potentially capable of self-assembling into hydrogels according to the structure and properties of each moiety. We then generated 14 novel conjugates based on this design by using two Fmoc/tBu solid-phase peptide synthesis techniques; we verified their structures and purities through liquid chromatography with tandem mass spectrometry and nuclear magnetic resonance spectroscopy. Of them, 13 conjugates formed hydrogels at low concentrations (≥0.25% w/v), but C8 acid-ILD-NH2 showed the best hydrogelation and was investigated further. Scanning electron microscopy revealed that C8 acid-ILD-NH2 formed fibrous network structures and rapidly formed hydrogels that were stable in phosphate-buffered saline (pH 2-8, 37 °C), a typical pathophysiological condition. Injection and rheological studies revealed that the hydrogels manifested important wound treatment properties, including injectability, shear thinning, rapid re-gelation, and wound-compatible mechanics (e.g., moduli G″ and G', ~0.5-15 kPa). The C8 acid-ILD-NH2(2) hydrogel markedly accelerated the healing of third-degree burn wounds on C57BL/6J mice. Taken together, our findings demonstrated the potential of the Cn fatty acid-AA1-AA2-D molecular template to form hydrogels capable of promoting the wound healing of third-degree burns.
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Affiliation(s)
- Sachin B. Baravkar
- Neuroscience Center of Excellence, School of Medicine, L.S.U. Health, New Orleans, LA 70112, USA
| | - Yan Lu
- Neuroscience Center of Excellence, School of Medicine, L.S.U. Health, New Orleans, LA 70112, USA
| | - Abdul-Razak Masoud
- Neuroscience Center of Excellence, School of Medicine, L.S.U. Health, New Orleans, LA 70112, USA
| | - Qi Zhao
- NMR Laboratory, Department of Chemistry, Tulane University, New Orleans, LA 70118, USA
| | - Jibao He
- Microscopy Laboratory, Tulane University, New Orleans, LA 70118, USA
| | - Song Hong
- Neuroscience Center of Excellence, School of Medicine, L.S.U. Health, New Orleans, LA 70112, USA
- Department of Ophthalmology, School of Medicine, L.S.U. Health, New Orleans, LA 70112, USA
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3
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Kang S, Onishi S, Ling Z, Inoue H, Zhang Y, Chang H, Zhao H, Wang T, Okuzaki D, Matsuura H, Takamatsu H, Oda J, Kishimoto T. Gp130-HIF1α axis-induced vascular damage is prevented by the short-term inhibition of IL-6 receptor signaling. Proc Natl Acad Sci U S A 2024; 121:e2315898120. [PMID: 38165930 PMCID: PMC10786312 DOI: 10.1073/pnas.2315898120] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2023] [Accepted: 11/22/2023] [Indexed: 01/04/2024] Open
Abstract
Protection against endothelial damage is recognized as a frontline approach to preventing the progression of cytokine release syndrome (CRS). Accumulating evidence has demonstrated that interleukin-6 (IL-6) promotes vascular endothelial damage during CRS, although the molecular mechanisms remain to be fully elucidated. Targeting IL-6 receptor signaling delays CRS progression; however, current options are limited by persistent inhibition of the immune system. Here, we show that endothelial IL-6 trans-signaling promoted vascular damage and inflammatory responses via hypoxia-inducible factor-1α (HIF1α)-induced glycolysis. Using pharmacological inhibitors targeting HIF1α activity or mice with the genetic ablation of gp130 in the endothelium, we found that inhibition of IL-6R (IL-6 receptor)-HIF1α signaling in endothelial cells protected against vascular injury caused by septic damage and provided survival benefit in a mouse model of sepsis. In addition, we developed a short half-life anti-IL-6R antibody (silent anti-IL-6R antibody) and found that it was highly effective at augmenting survival for sepsis and severe burn by strengthening the endothelial glycocalyx and reducing cytokine storm, and vascular leakage. Together, our data advance the role of endothelial IL-6 trans-signaling in the progression of CRS and indicate a potential therapeutic approach for burns and sepsis.
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Affiliation(s)
- Sujin Kang
- Department of Immune Regulation, Immunology Frontier Research Center, Osaka University, Suita, Osaka565-0871, Japan
- Department of Immune Regulation, Center for Infectious Disease Education and Research, Osaka University, Suita, Osaka565-0871, Japan
| | - Shinya Onishi
- Department of Traumatology and Acute Critical Medicine, Osaka University Graduate School of Medicine, Suita, Osaka565-0871, Japan
| | - Zhenzhen Ling
- Department of Immune Regulation, Immunology Frontier Research Center, Osaka University, Suita, Osaka565-0871, Japan
| | - Hitomi Inoue
- Department of Immune Regulation, Immunology Frontier Research Center, Osaka University, Suita, Osaka565-0871, Japan
| | - Yingying Zhang
- Department of Immune Regulation, Immunology Frontier Research Center, Osaka University, Suita, Osaka565-0871, Japan
| | - Hao Chang
- Department of Immune Regulation, Immunology Frontier Research Center, Osaka University, Suita, Osaka565-0871, Japan
| | - Hui Zhao
- Department of Immune Regulation, Immunology Frontier Research Center, Osaka University, Suita, Osaka565-0871, Japan
| | - Tong Wang
- Department of Immune Regulation, Immunology Frontier Research Center, Osaka University, Suita, Osaka565-0871, Japan
| | - Daisuke Okuzaki
- Next Generation-Sequencing Core Facility, Bioinformatics Center, Research Institute for Microbial Diseases, Osaka University, Suita, Osaka565-0871, Japan
| | - Hiroshi Matsuura
- Department of Traumatology and Acute Critical Medicine, Osaka University Graduate School of Medicine, Suita, Osaka565-0871, Japan
| | - Hyota Takamatsu
- Department of Clinical Research Center for Autoimmune Disease, Osaka Minami Medical Center, National Hospital Organization, Kawachinagano, Osaka586-8521, Japan
- Department of Respiratory Medicine and Clinical Immunology, Graduate School of Medicine, Osaka University, Suita, Osaka565-0871, Japan
| | - Jun Oda
- Department of Traumatology and Acute Critical Medicine, Osaka University Graduate School of Medicine, Suita, Osaka565-0871, Japan
| | - Tadamitsu Kishimoto
- Department of Immune Regulation, Immunology Frontier Research Center, Osaka University, Suita, Osaka565-0871, Japan
- Department of Immune Regulation, Center for Infectious Disease Education and Research, Osaka University, Suita, Osaka565-0871, Japan
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4
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Born LJ, Bengali S, Hsu ATW, Abadchi SN, Chang KH, Lay F, Matsangos A, Johnson C, Jay SM, Harmon JW. Chitosan Particles Complexed with CA5-HIF-1α Plasmids Increase Angiogenesis and Improve Wound Healing. Int J Mol Sci 2023; 24:14095. [PMID: 37762397 PMCID: PMC10531456 DOI: 10.3390/ijms241814095] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2023] [Revised: 09/06/2023] [Accepted: 09/11/2023] [Indexed: 09/29/2023] Open
Abstract
Wound therapies involving gene delivery to the skin have significant potential due to the advantage and ease of local treatment. However, choosing the appropriate vector to enable successful gene expression while also ensuring that the treatment's immediate material components are conducive to healing itself is critical. In this study, we utilized a particulate formulation of the polymer chitosan (chitosan particles, CPs) as a non-viral vector for the delivery of a plasmid encoding human CA5-HIF-1α, a degradation resistant form of HIF-1α, to enhance wound healing. We also compared the angiogenic potential of our treatment (HIF/CPs) to that of chitosan particles containing only the plasmid backbone (bb/CPs) and the chitosan particle vector alone (CPs). Our results indicate that chitosan particles exert angiogenic effects that are enhanced with the human CA5-HIF-1α-encoded plasmid. Moreover, HIF/CPs enhanced wound healing in diabetic db/db mice (p < 0.01), and healed tissue was found to contain a significantly increased number of blood vessels compared to bb/CPs (p < 0.01), CPs (p < 0.05) and no-treatment groups (p < 0.01). Thus, this study represents a method of gene delivery to the skin that utilizes an inherently pro-wound-healing polymer as a vector for plasmid DNA that has broad application for the expression of other therapeutic genes.
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Affiliation(s)
- Louis J. Born
- Fischell Department of Bioengineering, University of Maryland, College Park, MD 20742, USA
- Hendrix Burn and Wound Healing Laboratory, Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
| | - Sameer Bengali
- Hendrix Burn and Wound Healing Laboratory, Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
| | - Angela Ting Wei Hsu
- Hendrix Burn and Wound Healing Laboratory, Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
| | - Sanaz Nourmohammadi Abadchi
- Hendrix Burn and Wound Healing Laboratory, Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
| | - Kai-Hua Chang
- Hendrix Burn and Wound Healing Laboratory, Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
| | - Frank Lay
- Hendrix Burn and Wound Healing Laboratory, Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
| | - Aerielle Matsangos
- Hendrix Burn and Wound Healing Laboratory, Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
| | - Christopher Johnson
- Hendrix Burn and Wound Healing Laboratory, Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
| | - Steven M. Jay
- Fischell Department of Bioengineering, University of Maryland, College Park, MD 20742, USA
- Program in Molecular and Cell Biology, University of Maryland, College Park, MD 20742, USA
| | - John W. Harmon
- Hendrix Burn and Wound Healing Laboratory, Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
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5
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Electrospun multifaceted nanocomposites for promoting angiogenesis in curing burn wound. J Drug Deliv Sci Technol 2022. [DOI: 10.1016/j.jddst.2022.103425] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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6
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Sheets K, Overbey J, Ksajikian A, Bovid K, Kenter K, Li Y. The pathophysiology and treatment of musculoskeletal fibrosis. J Cell Biochem 2022; 123:843-851. [DOI: 10.1002/jcb.30217] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2021] [Revised: 12/20/2021] [Accepted: 01/07/2022] [Indexed: 12/19/2022]
Affiliation(s)
- Kelsey Sheets
- Department of Orthopaedic Surgery, Homer Stryker MD School of Medicine Western Michigan University Kalamazoo Michigan USA
| | - Juliana Overbey
- BioMedical Engineering, Department of Orthopaedic Surgery, WMed, Homer Stryker MD School of Medicine Western Michigan University Kalamazoo Michigan USA
| | - Andre Ksajikian
- BioMedical Engineering, Department of Orthopaedic Surgery, WMed, Homer Stryker MD School of Medicine Western Michigan University Kalamazoo Michigan USA
| | - Karen Bovid
- Department of Orthopaedic Surgery, Homer Stryker MD School of Medicine Western Michigan University Kalamazoo Michigan USA
| | - Keith Kenter
- Department of Orthopaedic Surgery, Homer Stryker MD School of Medicine Western Michigan University Kalamazoo Michigan USA
| | - Yong Li
- Department of Orthopaedic Surgery, Homer Stryker MD School of Medicine Western Michigan University Kalamazoo Michigan USA
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7
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Li QY, Liu F, Tang X, Fu H, Mao J. Renoprotective Role of Hypoxia-Inducible Factors and the Mechanism. KIDNEY DISEASES (BASEL, SWITZERLAND) 2022; 8:44-56. [PMID: 35224006 PMCID: PMC8820168 DOI: 10.1159/000520141] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/14/2021] [Accepted: 10/09/2021] [Indexed: 06/14/2023]
Abstract
BACKGROUND The kidney requires abundant blood supply, and oxygen is transmitted by diffusion through blood vessels. Most physiological metabolism of the kidney depends on oxygen, so it is very sensitive to oxygen. An increasing pool of evidence suggests that hypoxia is involved in almost all acute and chronic kidney diseases (CKDs). Vascular damage, tubular injury, and fibrosis are the main pathologies associated during hypoxia. Hypoxia-inducible factors (HIFs) are the main mediators during hypoxia, but their functions remain controversial. This article reviewed recent studies and described its mechanisms on renoprotection. SUMMARY HIF is degraded rapidly during under normal oxygen. But under hypoxia, HIFs accumulate and many target genes are regulated by HIFs. Homeostasis during injury is maintained through these genes. Pretreatment of HIF can protect the kidney from acute hypoxia and can improve repair, but HIF's role in CKD and in renal tumor is still controversial. Due to its mechanism in kidney disease, many drugs toward HIFs are widely researched, even some of which have been used in clinical or in clinical research. KEY MESSAGES In this review, we described the known physiological mechanisms, target genes, and renal protective roles of HIFs, and we discussed several drugs that are researched due to such renal protective roles.
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8
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George B, Bhatia N, Suchithra T. Burgeoning hydrogel technology in burn wound care: A comprehensive meta-analysis. Eur Polym J 2021. [DOI: 10.1016/j.eurpolymj.2021.110640] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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9
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Molecular Changes Underlying Hypertrophic Scarring Following Burns Involve Specific Deregulations at All Wound Healing Stages (Inflammation, Proliferation and Maturation). Int J Mol Sci 2021; 22:ijms22020897. [PMID: 33477421 PMCID: PMC7831008 DOI: 10.3390/ijms22020897] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2021] [Revised: 01/13/2021] [Accepted: 01/14/2021] [Indexed: 12/14/2022] Open
Abstract
Excessive connective tissue accumulation, a hallmark of hypertrophic scaring, results in progressive deterioration of the structure and function of organs. It can also be seen during tumor growth and other fibroproliferative disorders. These processes result from a wide spectrum of cross-talks between mesenchymal, epithelial and inflammatory/immune cells that have not yet been fully understood. In the present review, we aimed to describe the molecular features of fibroblasts and their interactions with immune and epithelial cells and extracellular matrix. We also compared different types of fibroblasts and their roles in skin repair and regeneration following burn injury. In summary, here we briefly review molecular changes underlying hypertrophic scarring following burns throughout all basic wound healing stages, i.e. during inflammation, proliferation and maturation.
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10
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Liu Z, Liu L, Cheng X, Gao L. Expression and predictive value of HIF-1α and VEGF in patients with burns following treatment. Exp Ther Med 2020; 20:141. [PMID: 33093879 PMCID: PMC7571334 DOI: 10.3892/etm.2020.9270] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2020] [Accepted: 05/15/2020] [Indexed: 11/28/2022] Open
Abstract
The present study aimed to investigate the expression and predictive value of serum hypoxia-inducible factor-1α (HIF-1α) and vascular endothelial growth factor (VEGF) in patients with burns following treatment. A total of 84 patients with burns treated in Jinan City People's Hospital (Jinan, China) between June 2015 and August 2017 were selected and their clinical information was collected. The expression levels of HIF-1α and VEGF before and after treatment were detected via ELISA, and HIF-1α and VEGF levels in patients with effective and ineffective treatment were compared. The predictive values of HIF-1α and VEGF in clinical efficacy were determined using receiver operating characteristic (ROC) curves, and independent risk factors affecting treatment inefficacy were analyzed via multivariate logistic regression. It was revealed that HIF-1α decreased significantly (P<0.05) while VEGF significantly increased in patients after treatment. Patients with effective treatment presented significantly lower HIF-1α levels and higher VEGF levels compared with those with ineffective treatment. The ROC curve indicated that the area under the curve (AUC) of HIF-1α for treatment efficacy was 0.795, the 95% CI was 0.666-0.924, the specificity and sensitivity were 68.75 and 80.88%, respectively, and the Youden index was 49.63%. For VEGF, the AUC, 95% CI, specificity, sensitivity and Youden index were 0.826, 0.725-0.928, 68.75, 82.35 and 51.10% respectively. Moreover, under the joint detection of HIF-1α and VEGF, the AUC was 0.847, 95% CI was 0.746-0.947, specificity and sensitivity were 87.50 and 66.18%, respectively, with a Youden index of 53.68%. Multivariate analysis demonstrated that higher HIF-1α level, lower VEGF level and higher burn degree before treatment were independent risk factors for treatment inefficacy. HIF-1α levels decreased and VEGF levels increased in burn patients after treatment. HIF-1α and VEGF before treatment may therefore serve as predictors for treatment efficacy.
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Affiliation(s)
- Zhufeng Liu
- Department of Burn Dermatology, Jinan City People's Hospital, Jinan, Shandong 271100, P.R. China
| | - Ling Liu
- Department of Burn Dermatology, Jinan City People's Hospital, Jinan, Shandong 271100, P.R. China
| | - Xuejuan Cheng
- Department of Nursing, The People's Hospital of Zouping City, Binzhou, Shandong 256200, P.R. China
| | - Liming Gao
- Department of Burn Dermatology, Jinan City People's Hospital, Jinan, Shandong 271100, P.R. China
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11
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Low LE, Wu J, Lee J, Tey BT, Goh BH, Gao J, Li F, Ling D. Tumor-responsive dynamic nanoassemblies for targeted imaging, therapy and microenvironment manipulation. J Control Release 2020; 324:69-103. [DOI: 10.1016/j.jconrel.2020.05.014] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2020] [Revised: 04/30/2020] [Accepted: 05/06/2020] [Indexed: 01/01/2023]
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12
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Lei R, Shen J, Zhang S, Liu A, Chen X, Wang Y, Sun J, Dai S, Xu J. Inactivating the ubiquitin ligase Parkin suppresses cell proliferation and induces apoptosis in human keloids. J Cell Physiol 2019; 234:16601-16608. [PMID: 30784061 DOI: 10.1002/jcp.28332] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2018] [Revised: 01/27/2019] [Accepted: 01/30/2019] [Indexed: 01/24/2023]
Abstract
Keloids are a common type of pathological skin healing, characterized by the destruction of the vascular network. Thus, keloids often exhibit anoxic conditions. Hypoxia-inducible factor-1α (HIF-1α) is a core factor that mediates hypoxia stress responses and allows the cells to adapt to low-oxygen conditions. In the current study, we identified that Parkin acted as an E3 ubiquitin ligase, contributing to the degradation of HIF-1α in keloid fibroblasts (KFs). Silencing of Parkin in KFs upregulated HIF-1α expression and prolonged its protein half-life. Furthermore, Parkin influenced transforming growth factor β (TGF-β)/Smad signaling by targeting HIF-1α. Under hypoxic conditions, silencing Parkin enhanced KF proliferation and inhibited apoptosis through the TGF-β/Smad signaling pathway. Notably, metformin, an antidiabetic drug, could significantly induce Parkin expression and enhance the interaction between Parkin and HIF-1α. As a result, we revealed an important mechanism for Parkin in keloid development and suggested that targeting Parkin could be an alternative method for keloid treatment.
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Affiliation(s)
- Rui Lei
- Department of Plastic Surgery, First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Jian Shen
- Department of Plastic Surgery, First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Shizhen Zhang
- Institute of Translational Medicine, Zhejiang University School of Medicine, Hangzhou, China
| | - Aiyu Liu
- Department of Neurology, Zhongda Hospital Affiliated to Southestern China University, Nanjing, China
| | - Xi Chen
- Department of Plastic Surgery, First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Yang Wang
- Department of Plastic Surgery, First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Jiaqi Sun
- Department of Plastic Surgery, First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Siya Dai
- Department of Plastic Surgery, First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Jinghong Xu
- Department of Plastic Surgery, First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
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13
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Masterson JC, Biette KA, Hammer JA, Nguyen N, Capocelli KE, Saeedi BJ, Harris RF, Fernando SD, Hosford LB, Kelly CJ, Campbell EL, Ehrentraut SF, Ahmed FN, Nakagawa H, Lee JJ, McNamee EN, Glover LE, Colgan SP, Furuta GT. Epithelial HIF-1α/claudin-1 axis regulates barrier dysfunction in eosinophilic esophagitis. J Clin Invest 2019; 129:3224-3235. [PMID: 31264974 DOI: 10.1172/jci126744] [Citation(s) in RCA: 50] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2019] [Accepted: 05/16/2019] [Indexed: 12/19/2022] Open
Abstract
Epithelial barrier dysfunction is a significant factor in many allergic diseases, including eosinophilic esophagitis (EoE). Infiltrating leukocytes and tissue adaptations increase metabolic demands and decrease oxygen availability at barrier surfaces. Understanding of how these processes impact barrier is limited, particularly in allergy. Here, we identified a regulatory axis whereby the oxygen-sensing transcription factor HIF-1α orchestrated epithelial barrier integrity, selectively controlling tight junction CLDN1 (claudin-1). Prolonged experimental hypoxia or HIF1A knockdown suppressed HIF-1α-dependent claudin-1 expression and epithelial barrier function, as documented in 3D organotypic epithelial cultures. L2-IL5OXA mice with EoE-relevant allergic inflammation displayed localized eosinophil oxygen metabolism, tissue hypoxia, and impaired claudin-1 barrier via repression of HIF-1α/claudin-1 signaling, which was restored by transgenic expression of esophageal epithelial-targeted stabilized HIF-1α. EoE patient biopsy analysis identified a repressed HIF-1α/claudin-1 axis, which was restored via pharmacologic HIF-1α stabilization ex vivo. Collectively, these studies reveal HIF-1α's critical role in maintaining barrier and highlight the HIF-1α/claudin-1 axis as a potential therapeutic target for EoE.
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Affiliation(s)
- Joanne C Masterson
- Allergy, Inflammation and Remodeling Research Laboratory, Human Health Research Institute, Department of Biology, Maynooth University, Maynooth, Co. Kildare, Ireland.,Gastrointestinal Eosinophilic Diseases Program, Department of Pediatrics, University of Colorado School of Medicine; Digestive Health Institute, Children's Hospital Colorado; Aurora, Colorado, USA.,Mucosal Inflammation Program, Department of Medicine, University of Colorado, Aurora, Colorado, USA
| | - Kathryn A Biette
- Gastrointestinal Eosinophilic Diseases Program, Department of Pediatrics, University of Colorado School of Medicine; Digestive Health Institute, Children's Hospital Colorado; Aurora, Colorado, USA.,Mucosal Inflammation Program, Department of Medicine, University of Colorado, Aurora, Colorado, USA
| | - Juliet A Hammer
- Gastrointestinal Eosinophilic Diseases Program, Department of Pediatrics, University of Colorado School of Medicine; Digestive Health Institute, Children's Hospital Colorado; Aurora, Colorado, USA.,Mucosal Inflammation Program, Department of Medicine, University of Colorado, Aurora, Colorado, USA
| | - Nathalie Nguyen
- Gastrointestinal Eosinophilic Diseases Program, Department of Pediatrics, University of Colorado School of Medicine; Digestive Health Institute, Children's Hospital Colorado; Aurora, Colorado, USA.,Mucosal Inflammation Program, Department of Medicine, University of Colorado, Aurora, Colorado, USA
| | - Kelley E Capocelli
- Department of Pathology, Children's Hospital Colorado, Aurora, Colorado, USA
| | - Bejan J Saeedi
- Mucosal Inflammation Program, Department of Medicine, University of Colorado, Aurora, Colorado, USA
| | - Rachel F Harris
- Gastrointestinal Eosinophilic Diseases Program, Department of Pediatrics, University of Colorado School of Medicine; Digestive Health Institute, Children's Hospital Colorado; Aurora, Colorado, USA.,Mucosal Inflammation Program, Department of Medicine, University of Colorado, Aurora, Colorado, USA
| | - Shahan D Fernando
- Gastrointestinal Eosinophilic Diseases Program, Department of Pediatrics, University of Colorado School of Medicine; Digestive Health Institute, Children's Hospital Colorado; Aurora, Colorado, USA.,Mucosal Inflammation Program, Department of Medicine, University of Colorado, Aurora, Colorado, USA
| | - Lindsay B Hosford
- Gastrointestinal Eosinophilic Diseases Program, Department of Pediatrics, University of Colorado School of Medicine; Digestive Health Institute, Children's Hospital Colorado; Aurora, Colorado, USA.,Mucosal Inflammation Program, Department of Medicine, University of Colorado, Aurora, Colorado, USA
| | - Caleb J Kelly
- Mucosal Inflammation Program, Department of Medicine, University of Colorado, Aurora, Colorado, USA
| | - Eric L Campbell
- Mucosal Inflammation Program, Department of Medicine, University of Colorado, Aurora, Colorado, USA
| | - Stefan F Ehrentraut
- Mucosal Inflammation Program, Department of Medicine, University of Colorado, Aurora, Colorado, USA
| | - Faria N Ahmed
- Gastrointestinal Eosinophilic Diseases Program, Department of Pediatrics, University of Colorado School of Medicine; Digestive Health Institute, Children's Hospital Colorado; Aurora, Colorado, USA
| | - Hiroshi Nakagawa
- Division of Gastroenterology, Department of Medicine, University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania, USA
| | | | - Eóin N McNamee
- Allergy, Inflammation and Remodeling Research Laboratory, Human Health Research Institute, Department of Biology, Maynooth University, Maynooth, Co. Kildare, Ireland.,Mucosal Inflammation Program, Department of Medicine, University of Colorado, Aurora, Colorado, USA
| | - Louise E Glover
- Mucosal Inflammation Program, Department of Medicine, University of Colorado, Aurora, Colorado, USA
| | - Sean P Colgan
- Mucosal Inflammation Program, Department of Medicine, University of Colorado, Aurora, Colorado, USA
| | - Glenn T Furuta
- Gastrointestinal Eosinophilic Diseases Program, Department of Pediatrics, University of Colorado School of Medicine; Digestive Health Institute, Children's Hospital Colorado; Aurora, Colorado, USA.,Mucosal Inflammation Program, Department of Medicine, University of Colorado, Aurora, Colorado, USA
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14
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The Dynamics of the Skin's Immune System. Int J Mol Sci 2019; 20:ijms20081811. [PMID: 31013709 PMCID: PMC6515324 DOI: 10.3390/ijms20081811] [Citation(s) in RCA: 293] [Impact Index Per Article: 58.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2019] [Revised: 04/09/2019] [Accepted: 04/09/2019] [Indexed: 12/12/2022] Open
Abstract
The skin is a complex organ that has devised numerous strategies, such as physical, chemical, and microbiological barriers, to protect the host from external insults. In addition, the skin contains an intricate network of immune cells resident to the tissue, crucial for host defense as well as tissue homeostasis. In the event of an insult, the skin-resident immune cells are crucial not only for prevention of infection but also for tissue reconstruction. Deregulation of immune responses often leads to impaired healing and poor tissue restoration and function. In this review, we will discuss the defensive components of the skin and focus on the function of skin-resident immune cells in homeostasis and their role in wound healing.
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15
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Shpichka A, Butnaru D, Bezrukov EA, Sukhanov RB, Atala A, Burdukovskii V, Zhang Y, Timashev P. Skin tissue regeneration for burn injury. Stem Cell Res Ther 2019; 10:94. [PMID: 30876456 PMCID: PMC6419807 DOI: 10.1186/s13287-019-1203-3] [Citation(s) in RCA: 182] [Impact Index Per Article: 36.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
The skin is the largest organ of the body, which meets the environment most directly. Thus, the skin is vulnerable to various damages, particularly burn injury. Skin wound healing is a serious interaction between cell types, cytokines, mediators, the neurovascular system, and matrix remodeling. Tissue regeneration technology remarkably enhances skin repair via re-epidermalization, epidermal-stromal cell interactions, angiogenesis, and inhabitation of hypertrophic scars and keloids. The success rates of skin healing for burn injuries have significantly increased with the use of various skin substitutes. In this review, we discuss skin replacement with cells, growth factors, scaffolds, or cell-seeded scaffolds for skin tissue reconstruction and also compare the high efficacy and cost-effectiveness of each therapy. We describe the essentials, achievements, and challenges of cell-based therapy in reducing scar formation and improving burn injury treatment.
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Affiliation(s)
- Anastasia Shpichka
- Institute for Regenerative Medicine, Sechenov University, Moscow, Russia
| | - Denis Butnaru
- Sechenov Biomedical Science and Technology Park, Sechenov University, Moscow, Russia
| | | | | | - Anthony Atala
- Wake Forest Institute for Regenerative Medicine, Wake Forest School of Medicine, Winston-Salem, NC USA
| | - Vitaliy Burdukovskii
- Baikal Institute of Nature Management, Siberian Branch of the Russian Academy of Sciences, Ulan-Ude, Russia
| | - Yuanyuan Zhang
- Wake Forest Institute for Regenerative Medicine, Wake Forest School of Medicine, Winston-Salem, NC USA
| | - Peter Timashev
- Institute for Regenerative Medicine, Sechenov University, Moscow, Russia
- Research Center “Crystallography and Photonics” RAS, Institute of Photonic Technologies, Troitsk, Moscow, Russia
- Departments of Polymers and Composites, N.N. Semenov Institute of Chemical Physics, Moscow, Russia
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16
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Thomas D, Radhakrishnan P. Tumor-stromal crosstalk in pancreatic cancer and tissue fibrosis. Mol Cancer 2019; 18:14. [PMID: 30665410 PMCID: PMC6341551 DOI: 10.1186/s12943-018-0927-5] [Citation(s) in RCA: 247] [Impact Index Per Article: 49.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2018] [Accepted: 12/20/2018] [Indexed: 12/12/2022] Open
Abstract
Pancreatic ductal adenocarcinoma (PDAC) is a devastating disease with high morbidity and mortality worldwide. To date, limited therapeutic achievements targeting cell proliferation and related mechanisms has led researchers to focus on the microenvironment where pancreatic cancers develop. The anomalous proliferation of stromal cells, such as pancreatic stellate cells, and an increased deposition of altered matrix proteins create an environment that facilitates tumor growth, metastasis and drug resistance. Here, we summarize our understanding of recent advances in research about the role of fibrosis in pancreatic cancer progression, with particular emphasize on the involvement of fibrotic machineries such as wound healing, extra cellular matrix degradation, and epithelial-to-mesenchymal transition. The precise influence of these mechanisms on the biological behaviors and growth of cancer cells has great impact on clinical therapy and therefore deserves more attention. We also discuss the role of various stromal components in conferring drug resistance to PDAC which further worsening the pessimistic disease prognosis. A more in depth understanding of cancer-stroma crosstalk within the tumor microenvironment and stroma based clinical and translational therapies may provide new therapeutic strategies for the prevention of pancreatic cancer progression.
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Affiliation(s)
- Divya Thomas
- Eppley Institute for Research in Cancer and Allied Diseases, Fred & Pamela Buffett Cancer Center, University of Nebraska Medical Center, 986805 Nebraska Medical Center, Omaha, NE, 68198-6805, USA
| | - Prakash Radhakrishnan
- Eppley Institute for Research in Cancer and Allied Diseases, Fred & Pamela Buffett Cancer Center, University of Nebraska Medical Center, 986805 Nebraska Medical Center, Omaha, NE, 68198-6805, USA.
- Department of Biochemistry and Molecular Biology, University of Nebraska Medical Center, Omaha, NE, USA.
- Department of Pathology and Microbiology, University of Nebraska Medical Center, Omaha, NE, USA.
- Department of Genetics, Cell Biology and Anatomy, University of Nebraska Medical Center, Omaha, NE, USA.
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17
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Alapure BV, Lu Y, He M, Chu CC, Peng H, Muhale F, Brewerton YL, Bunnell B, Hong S. Accelerate Healing of Severe Burn Wounds by Mouse Bone Marrow Mesenchymal Stem Cell-Seeded Biodegradable Hydrogel Scaffold Synthesized from Arginine-Based Poly(ester amide) and Chitosan. Stem Cells Dev 2018; 27:1605-1620. [PMID: 30215325 PMCID: PMC6276600 DOI: 10.1089/scd.2018.0106] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2018] [Accepted: 09/12/2018] [Indexed: 12/20/2022] Open
Abstract
Severe burns are some of the most challenging problems in clinics and still lack ideal modalities. Mesenchymal stem cells (MSCs) incorporated with biomaterial coverage of burn wounds may offer a viable solution. In this report, we seeded MSCs to a biodegradable hybrid hydrogel, namely ACgel, that was synthesized from unsaturated arginine-based poly(ester amide) (UArg-PEA) and chitosan derivative. MSC adhered to ACgels. ACgels maintained a high viability of MSCs in culture for 6 days. MSC seeded to ACgels presented well in third-degree burn wounds of mice at 8 days postburn (dpb) after the necrotic full-thickness skin of burn wounds was debrided and filled and covered by MSC-carrying ACgels. MSC-seeded ACgels promoted the closure, reepithelialization, granulation tissue formation, and vascularization of the burn wounds. ACgels alone can also promote vascularization but less effectively compared with MSC-seeded ACgels. The actions of MSC-seeded ACgels or ACgels alone involve the induction of reparative, anti-inflammatory interleukin-10, and M2-like macrophages, as well as the reduction of inflammatory cytokine TNFα and M1-like macrophages at the late inflammatory phase of burn wound healing, which provided the mechanistic insights associated with inflammation and macrophages in burn wounds. For the studied regimens of these treatments, no toxicity was identified to MSCs or mice. Our results indicate that MSC-seeded ACgels have potential use as a novel adjuvant therapy for severe burns to complement commonly used skin grafting and, thus, minimize the downsides of grafting.
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Affiliation(s)
- Bhagwat V. Alapure
- Neuroscience Center of Excellence, Louisiana State University Health Sciences Center, New Orleans, Louisiana
| | - Yan Lu
- Neuroscience Center of Excellence, Louisiana State University Health Sciences Center, New Orleans, Louisiana
| | - Mingyu He
- Department of Fiber Science and Apparel Design, Cornell University, Ithaca, New York
| | - Chih-Chang Chu
- Department of Fiber Science and Apparel Design, Cornell University, Ithaca, New York
- Department of Biomedical Engineering, Cornell University, Ithaca, New York
| | - Hongying Peng
- Department of Environmental Health, University of Cincinnati College of Medicine, Cincinnati, Ohio
| | - Filipe Muhale
- Neuroscience Center of Excellence, Louisiana State University Health Sciences Center, New Orleans, Louisiana
| | | | - Bruce Bunnell
- Center for Stem Cell Research and Regenerative Medicine, Tulane University School of Medicine, New Orleans, Louisiana
| | - Song Hong
- Neuroscience Center of Excellence, Louisiana State University Health Sciences Center, New Orleans, Louisiana
- Department of Ophthalmology, Louisiana State University Health Sciences Center, New Orleans, Louisiana
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18
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Enhanced nanoparticle delivery exploiting tumour-responsive formulations. Cancer Nanotechnol 2018; 9:10. [PMID: 30595759 PMCID: PMC6276285 DOI: 10.1186/s12645-018-0044-6] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2018] [Accepted: 11/01/2018] [Indexed: 12/27/2022] Open
Abstract
Nanoparticles can be used as drug carriers, contrast
agents and radiosensitisers for the treatment of cancer. Nanoparticles can either passively accumulate within tumour sites, or be conjugated with targeting ligands to actively enable tumour deposition. With respect to passive accumulation, particles < 150 nm accumulate with higher efficiency within the tumour microenvironment, a consequence of the enhanced permeability and retention effect. Despite these favourable properties, clinical translation of nano-therapeutics is inhibited due to poor in vivo stability, biodistribution and target cell internalisation. Nano-therapeutics can be modified to exploit features of the tumour microenvironment such as elevated hypoxia, increased pH and a compromised extracellular matrix. This is in contrast to cytotoxic chemotherapies which generally do not exploit the characteristic pathological features of the tumour microenvironment, and as such are prone to debilitating systemic toxicities. This review examines strategies for tumour microenvironment targeting to improve nanoparticle delivery, with particular focus on the delivery of nucleic acids and gold nanoparticles. Evidence for key research areas and future technologies are presented and critically evaluated. Among the most promising technologies are the development of next-generation cell penetrating peptides and the incorporation of micro-environment responsive stealth molecules.
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19
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Lam YT, Lecce L, Yuen GSC, Wise SG, Handelsman DJ, Ng MKC. Androgen action augments ischemia-induced, bone marrow progenitor cell-mediated vasculogenesis. Int J Biol Sci 2018; 14:1985-1992. [PMID: 30585262 PMCID: PMC6299365 DOI: 10.7150/ijbs.27378] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2018] [Accepted: 09/05/2018] [Indexed: 02/04/2023] Open
Abstract
Bone marrow-derived progenitor cell-mediated vasculogenesis is a key process for vascular repair and regeneration. However, the role of androgens in the mechanism of ischemia-induced vasculogenesis remains unclear. In this study, a gender-mismatch murine bone marrow transplant model was used to allow tissue tracking of transplanted cells. Bone marrow from 2-month-old male mice was transplanted into irradiated age-matched female recipients. Following the transplantation, ovariectomized female recipients were subjected to unilateral hindlimb ischemia and immediately implanted with either dihydrotestosterone (DHT) or placebo pellets. Laser Doppler perfusion imaging revealed that DHT significantly augmented blood flow recovery, with increased capillary density compared to placebo-treated female recipient controls. Flow cytometry analysis showed that DHT modulated vasculogenesis by increasing Sca1+/CXC4+ progenitor cell production in bone marrow and spleen and enhancing cell mobilization in circulating blood following hindlimb ischemia. Bone marrow cell homing was examined by detecting expression levels of male-specific SRY gene in the ischemic female tissues. DHT treatment promoted bone marrow cell homing to ischemic tissue shown by significantly higher SRY expression compared to placebo-treated females as well as reduced apoptotic features in DHT-treated females, including increased Bcl-2 expression, reduced Bax levels and decreased TUNEL staining. In conclusion, the gender-mismatched bone marrow transplant study shows that androgens directly enhance bone marrow cell-mediated vasculogenesis that contributes to ischemia-induced neovascularization.
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Affiliation(s)
- Yuen Ting Lam
- The Heart Research Institute, Newtown, Sydney NSW, 2042 Australia.,Sydney Medical School, The University of Sydney, NSW 2006 Australia
| | - Laura Lecce
- The Heart Research Institute, Newtown, Sydney NSW, 2042 Australia.,Sydney Medical School, The University of Sydney, NSW 2006 Australia
| | - Gloria S C Yuen
- The Heart Research Institute, Newtown, Sydney NSW, 2042 Australia.,Sydney Medical School, The University of Sydney, NSW 2006 Australia
| | - Steven G Wise
- The Heart Research Institute, Newtown, Sydney NSW, 2042 Australia.,Sydney Medical School, The University of Sydney, NSW 2006 Australia
| | - David J Handelsman
- ANZAC Research Institute, The University of Sydney, Concord Hospital NSW 2139 Australia
| | - Martin K C Ng
- The Heart Research Institute, Newtown, Sydney NSW, 2042 Australia.,Sydney Medical School, The University of Sydney, NSW 2006 Australia.,Royal Prince Alfred Hospital, Camperdown NSW Australia 2050
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20
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Salehi H, Momeni M, Ebrahimi M, Fatemi M, Rahbar H, Ranjpoor F, Salehi A, Moosavizadeh F. Comparing the effect of colactive plus ag dressing versus nitrofurazone and vaseline gauze dressing in the treatment of second-degree burns. ANNALS OF BURNS AND FIRE DISASTERS 2018; 31:204-208. [PMID: 30863254 PMCID: PMC6367865] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 09/07/2018] [Accepted: 10/11/2018] [Indexed: 06/09/2023]
Abstract
Wound care quality and speed of burn healing are important factors that affect the treatment, prognosis and complications of burns. Burn care is challenging, and the ideal method controversial. The aim of this study was to compare the effects of a new dressing (ColActive dressing) in the treatment of superficial second-degree burns versus traditional dressing including Vaseline and Nitrofurazone. This was a randomized clinical trial study involving 25 cases. A superficial second-degree burn area was divided into two parts in each patient; randomly, traditional dressing was used on one area, and ColActive plus Ag dressing on the other. Every 3 days, after removing the dressings and washing the wounds, wound surface area was evaluated by medical photographic records and J image software. Wound surface area in the two groups was compared before dressing and on the 3rd, 6th, 9th and 12th day afterwards. The difference was not significant before dressing, but significant on the 3rd, 6th, 9th and 12th post-operative day. The difference was significant in both groups, but it was more prominent in the ColActive group (p<0.001) than in the traditional group (p<0.05). Considering the results of this study and good results in previous case reports, ColActive may be more effective than traditional dressing. We suggest a more comprehensive study for a longer period with a larger number of cases to compare other important variables such as scar quality, cost, and pain in the two dressings.
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Affiliation(s)
| | - M. Momeni
- Mahnoush Momeni, Assistant Professor of General Surgery
Motahari Hospital, Burn Research CentreYasami Ave, Vali Asr St, TehranIran+98 2188770031+98 2188770048
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21
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von Allmen DC, Francey LJ, Rogers GM, Ruben MD, Cohen AP, Wu G, Schmidt RE, Ishman SL, Amin RS, Hogenesch JB, Smith DF. Circadian Dysregulation: The Next Frontier in Obstructive Sleep Apnea Research. Otolaryngol Head Neck Surg 2018; 159:948-955. [PMID: 30200807 DOI: 10.1177/0194599818797311] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
OBJECTIVE To review the effects of the circadian clock on homeostasis, the functional interaction between the circadian clock and hypoxia-inducible factors, and the role of circadian dysregulation in the progression of cardiopulmonary disease in obstructive sleep apnea (OSA). DATA SOURCES The MEDLINE database was accessed through PubMed. REVIEW METHODS A general review is presented on molecular pathways disrupted in OSA, circadian rhythms and the role of the circadian clock, hypoxia signaling, crosstalk between the circadian and hypoxia systems, the role of the circadian clock in cardiovascular disease, and implications for practice. Studies included in this State of the Art Review demonstrate the potential contribution of the circadian clock and hypoxia in animal models or human disease. CONCLUSIONS Molecular crosstalk between the circadian clock and hypoxia-inducible factors has not been evaluated in disease models of OSA. IMPLICATIONS FOR PRACTICE Pediatric OSA is highly prevalent and, if left untreated, may lead to cardiopulmonary sequelae. Changes in inflammatory markers that normally demonstrate circadian rhythmicity are also seen among patients with OSA. Hypoxia-inducible transcription factors interact with core circadian clock transcription factors; however, the interplay between these pathways has not been elucidated in the cardiopulmonary system. This gap in knowledge hinders our ability to identify potential biomarkers of OSA and develop alternative therapeutic strategies. A deeper understanding of the mechanisms by which OSA impinges on clock function and the impact of clock dysregulation on the cardiopulmonary system may lead to future advancements for the care of patients with OSA. The aim of this review is to shed light on this important clinical topic.
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Affiliation(s)
- Douglas C von Allmen
- 1 Department of Otolaryngology-Head and Neck Surgery, College of Medicine, University of Cincinnati, Cincinnati, Ohio, USA
| | - Lauren J Francey
- 2 Division of Human Genetics, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, USA
| | - Garrett M Rogers
- 3 College of Medicine, University of Cincinnati, Cincinnati, Ohio, USA
| | - Marc D Ruben
- 2 Division of Human Genetics, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, USA
| | - Aliza P Cohen
- 4 Division of Pediatric Otolaryngology-Head and Neck Surgery, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, USA
| | - Gang Wu
- 2 Division of Human Genetics, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, USA
| | - Robert E Schmidt
- 2 Division of Human Genetics, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, USA
| | - Stacey L Ishman
- 1 Department of Otolaryngology-Head and Neck Surgery, College of Medicine, University of Cincinnati, Cincinnati, Ohio, USA
- 4 Division of Pediatric Otolaryngology-Head and Neck Surgery, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, USA
- 5 Division of Pulmonary and Sleep Medicine, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, USA
| | - Raouf S Amin
- 5 Division of Pulmonary and Sleep Medicine, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, USA
- 6 Department of Pediatrics, College of Medicine, University of Cincinnati, Cincinnati, Ohio, USA
| | - John B Hogenesch
- 2 Division of Human Genetics, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, USA
- 6 Department of Pediatrics, College of Medicine, University of Cincinnati, Cincinnati, Ohio, USA
| | - David F Smith
- 1 Department of Otolaryngology-Head and Neck Surgery, College of Medicine, University of Cincinnati, Cincinnati, Ohio, USA
- 4 Division of Pediatric Otolaryngology-Head and Neck Surgery, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, USA
- 5 Division of Pulmonary and Sleep Medicine, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, USA
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22
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Bonham CA, Rodrigues M, Galvez M, Trotsyuk A, Stern-Buchbinder Z, Inayathullah M, Rajadas J, Gurtner GC. Deferoxamine can prevent pressure ulcers and accelerate healing in aged mice. Wound Repair Regen 2018; 26:300-305. [PMID: 30152571 PMCID: PMC6238634 DOI: 10.1111/wrr.12667] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2017] [Revised: 07/18/2018] [Accepted: 08/04/2018] [Indexed: 12/27/2022]
Abstract
Chronic wounds are a significant medical and economic problem worldwide. Individuals over the age of 65 are particularly vulnerable to pressure ulcers and impaired wound healing. With this demographic growing rapidly, there is a need for effective treatments. We have previously demonstrated that defective hypoxia signaling through destabilization of the master hypoxia-inducible factor 1α (HIF-1α) underlies impairments in both aging and diabetic wound healing. To stabilize HIF-1α, we developed a transdermal delivery system of the Food and Drug Administration-approved small molecule deferoxamine (DFO) and found that transdermal DFO could both prevent and treat ulcers in diabetic mice. Here, we demonstrate that transdermal DFO can similarly prevent pressure ulcers and normalize aged wound healing. Enhanced wound healing by DFO is brought about by stabilization of HIF-1α and improvements in neovascularization. Transdermal DFO can be rapidly translated into the clinic and may represent a new approach to prevent and treat pressure ulcers in aged patients.
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Affiliation(s)
- Clark A. Bonham
- Department of Surgery, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Melanie Rodrigues
- Department of Surgery, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Michael Galvez
- Department of Surgery, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Artem Trotsyuk
- Department of Surgery, Stanford University School of Medicine, Stanford, CA 94305, USA
| | | | - Mohammed Inayathullah
- Department of Surgery, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Jayakumar Rajadas
- Department of Surgery, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Geoffrey C. Gurtner
- Department of Surgery, Stanford University School of Medicine, Stanford, CA 94305, USA
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23
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Jeon HH, Yu Q, Lu Y, Spencer E, Lu C, Milovanova T, Yang Y, Zhang C, Stepanchenko O, Vafa RP, Coelho PG, Graves DT. FOXO1 regulates VEGFA expression and promotes angiogenesis in healing wounds. J Pathol 2018; 245:258-264. [PMID: 29574902 DOI: 10.1002/path.5075] [Citation(s) in RCA: 54] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2017] [Revised: 02/07/2018] [Accepted: 03/13/2018] [Indexed: 02/05/2023]
Abstract
Angiogenesis is a critical aspect of wound healing. We investigated the role of keratinocytes in promoting angiogenesis in mice with lineage-specific deletion of the transcription factor FOXO1. The results indicate that keratinocyte-specific deletion of Foxo1 reduces VEGFA expression in mucosal and skin wounds and leads to reduced endothelial cell proliferation, reduced angiogenesis, and impaired re-epithelialization and granulation tissue formation. In vitro FOXO1 was needed for VEGFA transcription and expression. In a porcine dermal wound-healing model that closely resembles healing in humans, local application of a FOXO1 inhibitor reduced angiogenesis. This is the first report that FOXO1 directly regulates VEGFA expression and that FOXO1 is needed for normal angiogenesis during wound healing. Copyright © 2018 Pathological Society of Great Britain and Ireland. Published by John Wiley & Sons, Ltd.
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Affiliation(s)
- Hyeran Helen Jeon
- Department of Orthodontics, School of Dental Medicine, University of Pennsylvania, Philadelphia, PA, USA.,Department of Periodontics, School of Dental Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Quan Yu
- Department of Periodontics, School of Dental Medicine, University of Pennsylvania, Philadelphia, PA, USA.,Department of Orthodontics, Ninth People's Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, PR China
| | - Yongjian Lu
- Department of Periodontics, School of Dental Medicine, University of Pennsylvania, Philadelphia, PA, USA.,Department of Stomatology, Xinhua Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, PR China
| | - Evelyn Spencer
- Department of Periodontics, School of Dental Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Chanyi Lu
- Department of Periodontics, School of Dental Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Tatyana Milovanova
- Department of Periodontics, School of Dental Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Yang Yang
- Department of Periodontics, School of Dental Medicine, University of Pennsylvania, Philadelphia, PA, USA.,State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, PR China
| | - Chenying Zhang
- Department of Periodontics, School of Dental Medicine, University of Pennsylvania, Philadelphia, PA, USA.,Department of Preventive Dentistry, Peking University School and Hospital of Stomatology, Beijing, PR China
| | - Olga Stepanchenko
- Department of Periodontics, School of Dental Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Rameen P Vafa
- Department of Periodontics, School of Dental Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Paulo G Coelho
- Biomaterials and Biomimetics, College of Dentistry, New York University, New York, NY, USA.,Hansjörg Wyss Department of Plastic Surgery, Langone Medical Center, New York University, New York, NY, USA
| | - Dana T Graves
- Department of Periodontics, School of Dental Medicine, University of Pennsylvania, Philadelphia, PA, USA
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24
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Abstract
PURPOSE OF REVIEW Diabetic foot ulcerations (DFU) affect 25% of patients with diabetes mellitus during their lifetime and constitute a major health problem as they are often recalcitrant to healing due to a constellation of both intrinsic and extrinsic factors. The purpose of this review is to (1) detail the current mechanistic understanding of DFU formation and (2) highlight future therapeutic targets. RECENT FINDINGS From a molecular perspective, DFUs exhibit a chronic inflammatory predisposition. In addition, increased local hypoxic conditions and impaired cellular responses to hypoxia are pathogenic factors that contribute to delayed wound healing. Finally, recent evidence suggests a role for epigenetic alterations, including microRNAs, in delayed DFU healing due to the complex interplay between genes and the environment. In this regard, notable progress has been made in the molecular and genetic understanding of DFU formation. However, further studies are needed to translate preclinical investigations into clinical therapies.
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Affiliation(s)
- Frank M Davis
- Department of Surgery, Section of Vascular Surgery, University of Michigan, 5364 Cardiovascular Center, 1500 E. Medical Center Drive, Ann Arbor, MI, 48109-5867, USA
| | - Andrew Kimball
- Department of Surgery, Section of Vascular Surgery, University of Michigan, 5364 Cardiovascular Center, 1500 E. Medical Center Drive, Ann Arbor, MI, 48109-5867, USA
| | - Anna Boniakowski
- Department of Surgery, Section of Vascular Surgery, University of Michigan, 5364 Cardiovascular Center, 1500 E. Medical Center Drive, Ann Arbor, MI, 48109-5867, USA
| | - Katherine Gallagher
- Department of Surgery, Section of Vascular Surgery, University of Michigan, 5364 Cardiovascular Center, 1500 E. Medical Center Drive, Ann Arbor, MI, 48109-5867, USA.
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25
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MacLauchlan SC, Calabro NE, Huang Y, Krishna M, Bancroft T, Sharma T, Yu J, Sessa WC, Giordano F, Kyriakides TR. HIF-1α represses the expression of the angiogenesis inhibitor thrombospondin-2. Matrix Biol 2017; 65:45-58. [PMID: 28789925 DOI: 10.1016/j.matbio.2017.07.002] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2017] [Revised: 07/13/2017] [Accepted: 07/15/2017] [Indexed: 12/22/2022]
Abstract
Thrombospondin-2 (TSP2) is a potent inhibitor of angiogenesis whose expression is dynamically regulated following injury. In the present study, it is shown that HIF-1α represses TSP2 transcription. Specifically, in vitro studies demonstrate that the prolyl hydroxylase inhibitor DMOG or hypoxia decrease TSP2 expression in fibroblasts. This effect is shown to be via a transcriptional mechanism as hypoxia does not alter TSP2 mRNA stability and this effect requires the TSP2 promoter. In addition, the documented repressive effect of nitric oxide (NO) on TSP2 is shown to be non-canonical and involves stabilization of hypoxia inducible factor-1a (HIF-1α). The regulation of TSP2 by hypoxia is supported by the in vivo observation that TSP2 has spatiotemporal expression distinct from regions of hypoxia in gastrocnemius muscle following murine hindlimb ischemia (HLI). A role for TSP2 regulation by HIF-1α is supported by the dysregulation of TSP2 expression in SM22α-cre HIF-1α KO mice following HLI. Indeed, there is a reduction in blood flow recovery in the SM22a-cre HIF-1α KO mice compared to littermate controls following HLI surgery, associated with impaired recovery and increased TSP2 levels. Moreover, SM22α-cre HIF-1α KO smooth muscle cells mice have increased TSP2 mRNA levels that persist in hypoxia. These findings identify a novel, ischemia-induced pro-angiogenic mechanism involving the transcriptional repression of TSP2 by HIF-1α.
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Affiliation(s)
- Susan C MacLauchlan
- Interdepartmental Program in Vascular Biology and Therapeutics, Amistad Building, Yale University School of Medicine, New Haven, CT 06520, USA; Department of Pathology, Amistad Building, Yale University School of Medicine, New Haven, CT 06520, USA.
| | - Nicole E Calabro
- Interdepartmental Program in Vascular Biology and Therapeutics, Amistad Building, Yale University School of Medicine, New Haven, CT 06520, USA; Department of Pathology, Amistad Building, Yale University School of Medicine, New Haven, CT 06520, USA.
| | - Yan Huang
- Interdepartmental Program in Vascular Biology and Therapeutics, Amistad Building, Yale University School of Medicine, New Haven, CT 06520, USA; Section of Cardiovascular Medicine, Amistad Building, Yale University School of Medicine, New Haven, CT 06520, USA.
| | - Meenakshi Krishna
- Interdepartmental Program in Vascular Biology and Therapeutics, Amistad Building, Yale University School of Medicine, New Haven, CT 06520, USA.
| | - Tara Bancroft
- Interdepartmental Program in Vascular Biology and Therapeutics, Amistad Building, Yale University School of Medicine, New Haven, CT 06520, USA; Department of Pathology, Amistad Building, Yale University School of Medicine, New Haven, CT 06520, USA.
| | - Tanuj Sharma
- Interdepartmental Program in Vascular Biology and Therapeutics, Amistad Building, Yale University School of Medicine, New Haven, CT 06520, USA.
| | - Jun Yu
- Interdepartmental Program in Vascular Biology and Therapeutics, Amistad Building, Yale University School of Medicine, New Haven, CT 06520, USA; Section of Cardiovascular Medicine, Amistad Building, Yale University School of Medicine, New Haven, CT 06520, USA.
| | - William C Sessa
- Interdepartmental Program in Vascular Biology and Therapeutics, Amistad Building, Yale University School of Medicine, New Haven, CT 06520, USA; Department of Pharmacology, Amistad Building, Yale University School of Medicine, New Haven, CT 06520, USA.
| | - Frank Giordano
- Section of Cardiovascular Medicine, Amistad Building, Yale University School of Medicine, New Haven, CT 06520, USA.
| | - Themis R Kyriakides
- Interdepartmental Program in Vascular Biology and Therapeutics, Amistad Building, Yale University School of Medicine, New Haven, CT 06520, USA; Department of Pathology, Amistad Building, Yale University School of Medicine, New Haven, CT 06520, USA.
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Hurst JH. William Kaelin, Peter Ratcliffe, and Gregg Semenza receive the 2016 Albert Lasker Basic Medical Research Award. J Clin Invest 2016; 126:3628-3638. [PMID: 27620538 DOI: 10.1172/jci90055] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
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Darby IA, Hewitson TD. Hypoxia in tissue repair and fibrosis. Cell Tissue Res 2016; 365:553-62. [DOI: 10.1007/s00441-016-2461-3] [Citation(s) in RCA: 101] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2016] [Accepted: 06/23/2016] [Indexed: 12/23/2022]
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Catrina SB, Zheng X. Disturbed hypoxic responses as a pathogenic mechanism of diabetic foot ulcers. Diabetes Metab Res Rev 2016; 32 Suppl 1:179-85. [PMID: 26453314 DOI: 10.1002/dmrr.2742] [Citation(s) in RCA: 87] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/19/2015] [Revised: 07/15/2015] [Accepted: 09/20/2015] [Indexed: 12/24/2022]
Abstract
Diabetic foot ulceration (DFU) is a chronic complication of diabetes that is characterized by impaired wound healing in the lower extremities. DFU remains a major clinical challenge because of poor understanding of its pathogenic mechanisms. Impaired wound healing in diabetes is characterized by decreased angiogenesis, reduced bone marrow-derived endothelial progenitor cell (EPC) recruitment, and decreased fibroblast and keratinocyte proliferation and migration. Recently, increasing evidence has suggested that increased hypoxic conditions and impaired cellular responses to hypoxia are essential pathogenic factors of delayed wound healing in DFU. Hypoxia-inducible factor-1 (HIF-1, a heterodimer of HIF-1α and HIF-1β) is a master regulator of oxygen homeostasis that mediates the adaptive cellular responses to hypoxia by regulating the expression of genes involved in angiogenesis, metabolic changes, proliferation, migration, and cell survival. However, HIF-1 signalling is inhibited in diabetes as a result of hyperglycaemia-induced HIF-1α destabilization and functional repression. Increasing HIF-1α expression and activity using various approaches promotes angiogenesis, EPC recruitment, and granulation, thereby improving wound healing in experimental diabetes. The mechanisms underlying HIF-1α regulation in diabetes and the therapeutic strategies targeting HIF-1 signalling for the treatment of diabetic wounds are discussed in this review. Further investigations of the pathways involved in HIF-1α regulation in diabetes are required to advance our understanding of the mechanisms underlying impaired wound healing in diabetes and to provide a foundation for developing novel therapeutic approaches to treat DFU.
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Affiliation(s)
- Sergiu-Bogdan Catrina
- Department of Molecular Medicine and Surgery, Karolinska Institutet, Stockholm, Sweden
| | - Xiaowei Zheng
- Department of Molecular Medicine and Surgery, Karolinska Institutet, Stockholm, Sweden
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Low-level red laser improves healing of second-degree burn when applied during proliferative phase. Lasers Med Sci 2015; 30:1297-304. [DOI: 10.1007/s10103-015-1729-2] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2014] [Accepted: 02/18/2015] [Indexed: 12/21/2022]
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Wu JC, Rose LF, Christy RJ, Leung KP, Chan RK. Full-Thickness Thermal Injury Delays Wound Closure in a Murine Model. Adv Wound Care (New Rochelle) 2015; 4:83-91. [PMID: 25713750 DOI: 10.1089/wound.2014.0570] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2014] [Accepted: 08/17/2014] [Indexed: 11/12/2022] Open
Abstract
Objective: The contemporary treatment of a full-thickness burn consists of early eschar excision followed by immediate closure of the open wound using autologous skin. However, most animal models study burn wound healing with the persistence of the burn eschar. Our goal is to characterize a murine model of burn eschar excision to study wound closure kinetics. Approach: C57BL/6 male mice were divided into three groups: contact burn, scald burn, or unburned control. Mice were burned at 80°C for 5, 10, or 20 s. After 2 days, the eschar was excised and wound closure was documented until postexcision day 13. Biopsies were examined for structural morphology and α-smooth muscle actin. In a subsequent interval-excision experiment (80°C scald for 10 s), the burn eschar was excised after 5 or 10 days postburn to determine the effect of a prolonged inflammatory focus. Results: Histology of both contact and scald burns revealed characteristics of a full-thickness injury marked by collagen coagulation and tissue necrosis. Excision at 2 days after a 20-s burn from either scald or contact showed significant delay in wound closure. Interval excision of the eschar, 5 or 10 days postburn, also showed significant delay in wound closure. Both interval-excision groups showed prolonged inflammation and increased myofibroblasts. Innovation and Conclusions: We have described the kinetics of wound closure in a murine model of a full-thickness burn excision. Both contact and scald full-thickness burn resulted in significantly delayed wound closure. In addition, prolonged interval-excision of the eschar appeared to increase and prolong inflammation.
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Affiliation(s)
- Jesse C. Wu
- Dental and Trauma Research Detachment, U.S. Army Institute of Surgical Research, Fort Sam Houston, Texas
- U.S. Army Institute of Surgical Research, Fort Sam Houston, Texas
| | - Lloyd F. Rose
- Dental and Trauma Research Detachment, U.S. Army Institute of Surgical Research, Fort Sam Houston, Texas
- U.S. Army Institute of Surgical Research, Fort Sam Houston, Texas
| | | | - Kai P. Leung
- Dental and Trauma Research Detachment, U.S. Army Institute of Surgical Research, Fort Sam Houston, Texas
- U.S. Army Institute of Surgical Research, Fort Sam Houston, Texas
| | - Rodney K. Chan
- Dental and Trauma Research Detachment, U.S. Army Institute of Surgical Research, Fort Sam Houston, Texas
- U.S. Army Institute of Surgical Research, Fort Sam Houston, Texas
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Harnoss JM, Strowitzki MJ, Radhakrishnan P, Platzer LK, Harnoss JC, Hank T, Cai J, Ulrich A, Schneider M. Therapeutic inhibition of prolyl hydroxylase domain-containing enzymes in surgery: putative applications and challenges. HYPOXIA 2015; 3:1-14. [PMID: 27774478 PMCID: PMC5045068 DOI: 10.2147/hp.s60872] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Oxygen is essential for metazoans to generate energy. Upon oxygen deprivation adaptive and protective pathways are induced, mediated by hypoxia-inducible factors (HIFs) and prolyl hydroxylase domain-containing enzymes (PHDs). Both play a pivotal role in various conditions associated with prolonged ischemia and inflammation, and are promising targets for therapeutic intervention. This review focuses on aspects of therapeutic PHD modulation in surgically relevant disease conditions such as hepatic and intestinal disorders, wound healing, innate immune responses, and tumorigenesis, and discusses the therapeutic potential and challenges of PHD inhibition in surgical patients.
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Affiliation(s)
- Jonathan Michael Harnoss
- Department of General, Visceral and Transplantation Surgery, University of Heidelberg, Heidelberg, Germany
| | - Moritz Johannes Strowitzki
- Department of General, Visceral and Transplantation Surgery, University of Heidelberg, Heidelberg, Germany
| | - Praveen Radhakrishnan
- Department of General, Visceral and Transplantation Surgery, University of Heidelberg, Heidelberg, Germany
| | - Lisa Katharina Platzer
- Department of General, Visceral and Transplantation Surgery, University of Heidelberg, Heidelberg, Germany
| | - Julian Camill Harnoss
- Department of General, Visceral and Transplantation Surgery, University of Heidelberg, Heidelberg, Germany
| | - Thomas Hank
- Department of General, Visceral and Transplantation Surgery, University of Heidelberg, Heidelberg, Germany
| | - Jun Cai
- Department of General, Visceral and Transplantation Surgery, University of Heidelberg, Heidelberg, Germany
| | - Alexis Ulrich
- Department of General, Visceral and Transplantation Surgery, University of Heidelberg, Heidelberg, Germany
| | - Martin Schneider
- Department of General, Visceral and Transplantation Surgery, University of Heidelberg, Heidelberg, Germany
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Yu Q, Liu L, Lin J, Wang Y, Xuan X, Guo Y, Hu S. SDF-1α/CXCR4 Axis Mediates The Migration of Mesenchymal Stem Cells to The Hypoxic-Ischemic Brain Lesion in A Rat Model. CELL JOURNAL 2015; 16:440-7. [PMID: 25685734 PMCID: PMC4297482 DOI: 10.22074/cellj.2015.504] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/08/2013] [Accepted: 11/06/2013] [Indexed: 12/16/2022]
Abstract
Objective Transplantation of mesenchymal stem cells (MSCs) can promote functional
recovery of the brain after hypoxic-ischemic brain damage (HIBD). However, the mechanism regulating MSC migration to a hypoxic-ischemic lesion is poorly understood. Interaction between stromal cell-derived factor-1α (SDF-1α) and its cognate receptor CXC
chemokine receptor 4 (CXCR4) is crucial for homing and migration of multiple stem cell
types. In this study, we investigate the potential role of SDF-1α/CXCR4 axis in mediating
MSC migration in an HIBD model.
Materials and Methods In this experimental study, we first established the animal model of HIBD using the neonatal rat. Bone marrow MSCs were cultured and labeled with
5-bromo-21-deoxyuridine (BrdU) after which 6×106 cells were intravenously injected into
the rat. BrdU positive MSCs in the hippocampus were detected by immunohistochemical
analyses. The expression of hypoxia-inducible factor-1α (HIF-1α) and SDF-1α in the hippocampus of hypoxic-ischemic rats was detected by Western blotting. To investigate the
role of hypoxia and SDF-1α on migration of MSCs in vitro, MSCs isolated from normal
rats were cultured in a hypoxic environment (PO2=1%). Migration of MSCs was detected
by the transwell assay. The expression of CXCR4 was tested using Western blotting and
flow cytometry.
Results BrdU-labeled MSCs were found in the rat brain, which suggested that transplanted MSCs migrated to the site of the hypoxic-ischemic brain tissue. HIF-1α and SDF-1α significantly increased in the hippocampal formations of HIBD rats in a time-dependent
manner. They peaked on day 7 and were stably expressed until day 21. Migration of MSCs
in vitro was promoted by SDF-1α under hypoxia and inhibited by the CXCR4 inhibitor
AMD3100. The expression of CXCR4 on MSCs was elevated by hypoxia stimulation as
well as microdosage treatment of SDF-1α. Conclusion This observation illustrates that SDF-1α/CXCR4 axis mediate the migration
of MSCs to a hypoxic-ischemic brain lesion in a rat model.
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Affiliation(s)
- Qin Yu
- College of Life Science, Zhejiang Chinese Medical University, Hangzhou, China ; Institute of Bioengineering, Zhejiang Chinese Medical University, Hangzhou, 310053, China
| | - Lizhen Liu
- Bone Marrow Transplantation Center, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Jie Lin
- College of Life Science, Zhejiang Chinese Medical University, Hangzhou, China
| | - Yan Wang
- The First Affiliated Hospital, Zhejiang Chinese Medical University, Hangzhou, China
| | - Xiaobo Xuan
- The First Affiliated Hospital, Zhejiang Chinese Medical University, Hangzhou, China
| | - Ying Guo
- College of Life Science, Zhejiang Chinese Medical University, Hangzhou, China
| | - Shaojun Hu
- College of Life Science, Zhejiang Chinese Medical University, Hangzhou, China
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Han Y, Tao J, Gomer A, Ramirez-Bergeron DL. Loss of endothelial-ARNT in adult mice contributes to dampened circulating proangiogenic cells and delayed wound healing. Vasc Med 2014; 19:429-41. [PMID: 25398385 DOI: 10.1177/1358863x14559588] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The recruitment and homing of circulating bone marrow-derived cells include endothelial progenitor cells (EPCs) that are critical to neovascularization and tissue regeneration of various vascular pathologies. We report here that conditional inactivation of hypoxia-inducible factor's (HIF) transcriptional activity in the endothelium of adult mice (Arnt(ΔiEC) mice) results in a disturbance of infiltrating cells, a hallmark of neoangiogenesis, during the early phases of wound healing. Cutaneous biopsy punches show distinct migration of CD31(+) cells into wounds of control mice by 36 hours. However, a significant decline in numbers of infiltrating cells with immature vascular markers, as well as decreased transcript levels of genes associated with their expression and recruitment, were identified in wounds of Arnt(ΔiEC) mice. Matrigel plug assays further confirmed neoangiogenic deficiencies alongside a reduction in numbers of proangiogenic progenitor cells from bone marrow and peripheral blood samples of recombinant vascular endothelial growth factor-treated Arnt(ΔiEC) mice. In addition to HIF's autocrine requirements in endothelial cells, our data implicate that extrinsic microenvironmental cues provided by endothelial HIF are pivotal for early migration of proangiogenic cells, including those involved in wound healing.
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Affiliation(s)
- Yu Han
- Case Cardiovascular Research Institute and University Hospitals Harrington Heart & Vascular Institute, Case Western Reserve University School of Medicine, Cleveland, OH, USA University of Rochester, School of Medicine and Dentistry, Rochester, NY, USA
| | - Jiayi Tao
- Case Cardiovascular Research Institute and University Hospitals Harrington Heart & Vascular Institute, Case Western Reserve University School of Medicine, Cleveland, OH, USA
| | - Alla Gomer
- Case Cardiovascular Research Institute and University Hospitals Harrington Heart & Vascular Institute, Case Western Reserve University School of Medicine, Cleveland, OH, USA
| | - Diana L Ramirez-Bergeron
- Case Cardiovascular Research Institute and University Hospitals Harrington Heart & Vascular Institute, Case Western Reserve University School of Medicine, Cleveland, OH, USA
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Hypoxic signaling during tissue repair and regenerative medicine. Int J Mol Sci 2014; 15:19791-815. [PMID: 25365172 PMCID: PMC4264139 DOI: 10.3390/ijms151119791] [Citation(s) in RCA: 70] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2014] [Revised: 09/12/2014] [Accepted: 10/15/2014] [Indexed: 12/11/2022] Open
Abstract
In patients with chronic wounds, autologous tissue repair is often not sufficient to heal the wound. These patients might benefit from regenerative medicine or the implantation of a tissue-engineered scaffold. Both wound healing and tissue engineering is dependent on the formation of a microvascular network. This process is highly regulated by hypoxia and the transcription factors hypoxia-inducible factors-1α (HIF-1α) and -2α (HIF-2α). Even though much is known about the function of HIF-1α in wound healing, knowledge about the function of HIF-2α in wound healing is lacking. This review focuses on the function of HIF-1α and HIF-2α in microvascular network formation, wound healing, and therapy strategies.
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Abstract
Of the deaths attributed to cancer, 90% are due to metastasis, and treatments that prevent or cure metastasis remain elusive. Emerging data indicate that hypoxia and the extracellular matrix (ECM) might have crucial roles in metastasis. During tumour evolution, changes in the composition and the overall content of the ECM reflect both its biophysical and biological properties and these strongly influence tumour and stromal cell properties, such as proliferation and motility. Originally thought of as independent contributors to metastatic spread, recent studies have established a direct link between hypoxia and the composition and the organization of the ECM, which suggests a new model in which multiple microenvironmental signals might converge to synergistically influence metastatic outcome.
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Affiliation(s)
- Daniele M Gilkes
- 1] Vascular Program, Institute for Cell Engineering, and McKusick-Nathans Institute of Genetic Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland 21205, USA. [2] Johns Hopkins Physical Sciences-Oncology Center, The Johns Hopkins University, Baltimore, Maryland 21218, USA
| | - Gregg L Semenza
- 1] Vascular Program, Institute for Cell Engineering, and McKusick-Nathans Institute of Genetic Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland 21205, USA. [2] Johns Hopkins Physical Sciences-Oncology Center, The Johns Hopkins University, Baltimore, Maryland 21218, USA. [3] Departments of Pediatrics, Oncology, Medicine, Radiation Oncology and Biological Chemistry, Johns Hopkins University School of Medicine, Baltimore, Maryland 21205, USA
| | - Denis Wirtz
- 1] Johns Hopkins Physical Sciences-Oncology Center, The Johns Hopkins University, Baltimore, Maryland 21218, USA. [2] Department of Chemical and Biomolecular Engineering, The Johns Hopkins University, Baltimore, Maryland 21218, USA. [3] Departments of Oncology and Pathology and Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, Maryland 21205, USA
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Hong WX, Hu MS, Esquivel M, Liang GY, Rennert RC, McArdle A, Paik KJ, Duscher D, Gurtner GC, Lorenz HP, Longaker MT. The Role of Hypoxia-Inducible Factor in Wound Healing. Adv Wound Care (New Rochelle) 2014; 3:390-399. [PMID: 24804159 DOI: 10.1089/wound.2013.0520] [Citation(s) in RCA: 217] [Impact Index Per Article: 21.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2013] [Accepted: 01/30/2014] [Indexed: 12/14/2022] Open
Abstract
Significance: Poor wound healing remains a significant health issue for a large number of patients in the United States. The physiologic response to local wound hypoxia plays a critical role in determining the success of the normal healing process. Hypoxia-inducible factor-1 (HIF-1), as the master regulator of oxygen homeostasis, is an important determinant of healing outcomes. HIF-1 contributes to all stages of wound healing through its role in cell migration, cell survival under hypoxic conditions, cell division, growth factor release, and matrix synthesis throughout the healing process. Recent Advances: Positive regulators of HIF-1, such as prolyl-4-hydroxylase inhibitors, have been shown to be beneficial in enhancing diabetic ischemic wound closure and are currently undergoing clinical trials for treatment of several human-ischemia-based conditions. Critical Issues: HIF-1 deficiency and subsequent failure to respond to hypoxic stimuli leads to chronic hypoxia, which has been shown to contribute to the formation of nonhealing ulcers. In contrast, overexpression of HIF-1 has been implicated in fibrotic disease through its role in increasing myofibroblast differentiation leading to excessive matrix production and deposition. Both positive and negative regulators of HIF-1 therefore provide important therapeutic targets that can be used to manipulate HIF-1 expression where an excess or deficiency in HIF-1 is known to correlate with pathogenesis. Future Directions: Targeting HIF-1 during wound healing has many important clinical implications for tissue repair. Counteracting the detrimental effects of excessive or deficient HIF-1 signaling by modulating HIF-1 expression may improve future management of poorly healing wounds.
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Affiliation(s)
- Wan Xing Hong
- Hagey Laboratory for Pediatric Regenerative Medicine, Division of Plastic Surgery, Department of Surgery, Stanford University School of Medicine, Stanford, California
- Department of Radiology, Stanford University School of Medicine, Stanford, California
- University of Central Florida College of Medicine, Orlando, Florida
| | - Michael S. Hu
- Hagey Laboratory for Pediatric Regenerative Medicine, Division of Plastic Surgery, Department of Surgery, Stanford University School of Medicine, Stanford, California
- Department of Surgery, John A. Burns School of Medicine, University of Hawai'i, Honolulu, Hawai'i
| | - Mikaela Esquivel
- Hagey Laboratory for Pediatric Regenerative Medicine, Division of Plastic Surgery, Department of Surgery, Stanford University School of Medicine, Stanford, California
| | - Grace Y. Liang
- Division of Cardiovascular Medicine, Department of Medicine, Stanford University School of Medicine, Stanford, California
| | - Robert C. Rennert
- Hagey Laboratory for Pediatric Regenerative Medicine, Division of Plastic Surgery, Department of Surgery, Stanford University School of Medicine, Stanford, California
| | - Adrian McArdle
- Hagey Laboratory for Pediatric Regenerative Medicine, Division of Plastic Surgery, Department of Surgery, Stanford University School of Medicine, Stanford, California
| | - Kevin J. Paik
- Hagey Laboratory for Pediatric Regenerative Medicine, Division of Plastic Surgery, Department of Surgery, Stanford University School of Medicine, Stanford, California
| | - Dominik Duscher
- Hagey Laboratory for Pediatric Regenerative Medicine, Division of Plastic Surgery, Department of Surgery, Stanford University School of Medicine, Stanford, California
| | - Geoffrey C. Gurtner
- Hagey Laboratory for Pediatric Regenerative Medicine, Division of Plastic Surgery, Department of Surgery, Stanford University School of Medicine, Stanford, California
| | - H. Peter Lorenz
- Hagey Laboratory for Pediatric Regenerative Medicine, Division of Plastic Surgery, Department of Surgery, Stanford University School of Medicine, Stanford, California
| | - Michael T. Longaker
- Hagey Laboratory for Pediatric Regenerative Medicine, Division of Plastic Surgery, Department of Surgery, Stanford University School of Medicine, Stanford, California
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Tan T, Hu ZQ. Construction and expression of retroviral vector pLEGFP-N1-TERT in preparation of seed cells for skin tissue engineering. ASIAN PAC J TROP MED 2013; 6:960-3. [PMID: 24144027 DOI: 10.1016/s1995-7645(13)60171-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2013] [Revised: 10/15/2013] [Accepted: 11/15/2013] [Indexed: 11/18/2022] Open
Abstract
OBJECTIVE To construct the retroviral vector pLEGFP-N1-telomerase reverse transcriptase (TERT) and to investigate the expression of TERT in neonatal mouse hypodermal cells. METHODS The polymerase chain reaction (PCR)-amplified TERT gene was inserted into plasmid pLEGFP-N1. The positive clone was identified by restriction enzyme digestion and sequencing, then was transfected into packaging cells to produce retrovirus particles. Neonatal mouse hypodermal cells were infected with the virus to generate a stable cell line. The TERT mRNA expression level, telomerase activity, and enhanced green fluorescent protein (EGFP) expression level were analyzed. RESULTS Retroviral vector pLEGFP-N1-TERT was constructed successfully, and a stable cell line of neonatal mouse hypodermal cells expressing EGFP was established. Western blot and immunohistochemical assay showed that the expression level of TERT was significantly elevated in the neonatal mouse hypodermal cells. CONCLUSIONS A high titer of retrovirus pLEGFP-N1-TERT mediates high-level expression of the exogenous TERT gene in the neonatal mouse hypodermal cells. This protocol has potential applications for skin tissue engineering and cell transplantation therapy.
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Affiliation(s)
- Ting Tan
- Epartment of Burn And Plastic Surgery, Fuzhou General Hospital of Nanjing Command, PLA, Fuzhou, China
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Epidermal deletion of HIF-2α stimulates wound closure. J Invest Dermatol 2013; 134:801-808. [PMID: 24037341 PMCID: PMC3877686 DOI: 10.1038/jid.2013.395] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2013] [Revised: 08/28/2013] [Accepted: 08/28/2013] [Indexed: 12/21/2022]
Abstract
Wound closure requires a complex series of micro-environmentally influenced events. A key aspect of wound closure is the migration of keratinocytes across the open wound. It has been found previously that the response to hypoxia via the HIF-1α transcription factor is a key feature of wound closure. The need for hypoxic response is likely due to interrupted wound vasculature, as well as infection, and in this work we investigated the need for a highly related hypoxic response transcription factor, HIF-2α. This factor was deleted tissue specifically in mice, and the resulting mice were found to have an accelerated rate of wound closure. This is correlated with a reduced bacterial load and inflammatory response in these mice. This indicates that manipulating or reducing the HIF-2α response in keratinocytes could be a useful means to accelerate wound healing and tissue repair.
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Goggins BJ, Chaney C, Radford-Smith GL, Horvat JC, Keely S. Hypoxia and Integrin-Mediated Epithelial Restitution during Mucosal Inflammation. Front Immunol 2013; 4:272. [PMID: 24062740 PMCID: PMC3769679 DOI: 10.3389/fimmu.2013.00272] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2013] [Accepted: 08/27/2013] [Indexed: 12/27/2022] Open
Abstract
Epithelial damage and loss of intestinal barrier function are hallmark pathologies of the mucosal inflammation associated with conditions such as inflammatory bowel disease. In order to resolve inflammation and restore intestinal integrity the mucosa must rapidly and effectively repair the epithelial barrier. Epithelial wound healing is a highly complex and co-ordinated process and the factors involved in initiating intestinal epithelial healing are poorly defined. In order for restitution to be successful there must be a balance between epithelial cell migration, proliferation, and differentiation within and adjacent to the inflamed area. Endogenous, compensatory epithelial signaling pathways are activated by the changes in oxygen tensions that accompany inflammation. These signaling pathways induce the activation of key transcription factors, governing anti-apoptotic, and proliferative processes resulting in epithelial cell survival, proliferation, and differentiation at the site of mucosal inflammation. In this review, we will discuss the primary processes involved in epithelial restitution with a focus on the role of hypoxia-inducible factor and epithelial integrins as mediators of epithelial repair following inflammatory injury at the mucosal surface.
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Affiliation(s)
- Bridie J Goggins
- School of Biomedical Sciences and Pharmacy, University of Newcastle , Newcastle, NSW , Australia ; Hunter Medical Research Institute , New Lambton, NSW , Australia
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Semenza GL. Oxygen sensing, hypoxia-inducible factors, and disease pathophysiology. ANNUAL REVIEW OF PATHOLOGY-MECHANISMS OF DISEASE 2013; 9:47-71. [PMID: 23937437 DOI: 10.1146/annurev-pathol-012513-104720] [Citation(s) in RCA: 802] [Impact Index Per Article: 72.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Hypoxia-inducible factors (HIFs) are transcriptional activators that function as master regulators of oxygen homeostasis, which is disrupted in disorders affecting the circulatory system and in cancer. The role of HIFs in these diseases has been elucidated by clinical studies and by analyses of mouse models. HIFs play a protective role in the pathophysiology of myocardial ischemia due to coronary artery disease, limb ischemia due to peripheral arterial disease, pressure-overload heart failure, wound healing, and chronic rejection of organ transplants. In contrast, HIFs contribute to the pathogenesis of pulmonary arterial hypertension, systemic hypertension associated with sleep apnea, ocular neovascularization, hereditary erythrocytosis, and cancer.
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Affiliation(s)
- Gregg L Semenza
- Vascular Program, Institute for Cell Engineering; Departments of Pediatrics, Medicine, Oncology, Radiation Oncology, and Biological Chemistry; and McKusick-Nathans Institute of Genetic Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland 21205;
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Du J, Liu L, Lay F, Wang Q, Dou C, Zhang X, Hosseini SM, Simon A, Rees DJ, Ahmed AK, Sebastian R, Sarkar K, Milner S, Marti GP, Semenza GL, Harmon JW. Combination of HIF-1α gene transfection and HIF-1-activated bone marrow-derived angiogenic cell infusion improves burn wound healing in aged mice. Gene Ther 2013; 20:1070-6. [DOI: 10.1038/gt.2013.32] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2013] [Revised: 05/10/2013] [Accepted: 05/15/2013] [Indexed: 01/13/2023]
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Musyoka JN, Liu MC, Pouniotis DS, Wong CS, Bowtell DD, Little PJ, Getachew R, Möller A, Darby IA. Siah2-deficient mice show impaired skin wound repair. Wound Repair Regen 2013; 21:437-47. [DOI: 10.1111/wrr.12045] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2012] [Accepted: 01/30/2013] [Indexed: 11/30/2022]
Affiliation(s)
- James N. Musyoka
- Health Innovations Research Institute; School of Medical Sciences; RMIT University; Bundoora
| | - Mira C.P. Liu
- Peter MacCallum Cancer Centre; Cancer Genomics and Genetics Laboratory; East Melbourne
| | - Dodie S. Pouniotis
- Health Innovations Research Institute; School of Medical Sciences; RMIT University; Bundoora
| | | | | | - Peter J. Little
- Health Innovations Research Institute; School of Medical Sciences; RMIT University; Bundoora
| | - Robel Getachew
- Health Innovations Research Institute; School of Medical Sciences; RMIT University; Bundoora
| | | | - Ian A. Darby
- Health Innovations Research Institute; School of Medical Sciences; RMIT University; Bundoora
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Lokmic Z, Musyoka J, Hewitson TD, Darby IA. Hypoxia and hypoxia signaling in tissue repair and fibrosis. INTERNATIONAL REVIEW OF CELL AND MOLECULAR BIOLOGY 2012; 296:139-85. [PMID: 22559939 DOI: 10.1016/b978-0-12-394307-1.00003-5] [Citation(s) in RCA: 141] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Following injury, vascular damage results in the loss of perfusion and consequent low oxygen tension (hypoxia) which may be exacerbated by a rapid influx of inflammatory and mesenchymal cells with high metabolic demands for oxygen. Changes in systemic and cellular oxygen concentrations induce tightly regulated response pathways that attempt to restore oxygen supply to cells and modulate cell function in hypoxic conditions. Most of these responses occur through the induction of the transcription factor hypoxia-inducible factor-1 (HIF-1) which regulates many processes needed for tissue repair during ischemia in the damaged tissue. HIF-1 transcriptionally upregulates expression of metabolic proteins (GLUT-1), adhesion proteins (integrins), soluble growth factors (TGF-β and VEGF), and extracellular matrix components (type I collagen and fibronectin), which enhance the repair process. For these reasons, HIF-1 is viewed as a positive regulator of wound healing and a potential regulator of organ repair and tissue fibrosis. Understanding the complex role of hypoxia in the loss of function in scarring tissues and biology of chronic wound, and organ repair will aid in the development of pharmaceutical agents that can redress the detrimental outcomes often seen in repair and scarring.
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Affiliation(s)
- Zerina Lokmic
- Department of Surgery, St. Vincent's Hospital, University of Melbourne, Fitzroy, Victoria, Australia
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Abstract
The vascular network delivers oxygen (O(2)) and nutrients to all cells within the body. It is therefore not surprising that O(2) availability serves as a primary regulator of this complex organ. Most transcriptional responses to low O(2) are mediated by hypoxia-inducible factors (HIFs), highly conserved transcription factors that control the expression of numerous angiogenic, metabolic, and cell cycle genes. Accordingly, the HIF pathway is currently viewed as a master regulator of angiogenesis. HIF modulation could provide therapeutic benefit for a wide array of pathologies, including cancer, ischemic heart disease, peripheral artery disease, wound healing, and neovascular eye diseases. Hypoxia promotes vessel growth by upregulating multiple pro-angiogenic pathways that mediate key aspects of endothelial, stromal, and vascular support cell biology. Interestingly, recent studies show that hypoxia influences additional aspects of angiogenesis, including vessel patterning, maturation, and function. Through extensive research, the integral role of hypoxia and HIF signaling in human disease is becoming increasingly clear. Consequently, a thorough understanding of how hypoxia regulates angiogenesis through an ever-expanding number of pathways in multiple cell types will be essential for the identification of new therapeutic targets and modalities.
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Affiliation(s)
- Bryan L Krock
- Abramson Family Cancer Research Institute, University of Pennsylvania, Philadelphia, PA, USA
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Takaku M, Tomita S, Kurobe H, Kihira Y, Morimoto A, Higashida M, Ikeda Y, Ushiyama A, Hashimoto I, Nakanishi H, Tamaki T. Systemic preconditioning by a prolyl hydroxylase inhibitor promotes prevention of skin flap necrosis via HIF-1-induced bone marrow-derived cells. PLoS One 2012; 7:e42964. [PMID: 22880134 PMCID: PMC3413653 DOI: 10.1371/journal.pone.0042964] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2012] [Accepted: 07/16/2012] [Indexed: 01/07/2023] Open
Abstract
Background Local skin flaps often present with flap necrosis caused by critical disruption of the blood supply. Although animal studies demonstrate enhanced angiogenesis in ischemic tissue, no strategy for clinical application of this phenomenon has yet been defined. Hypoxia-inducible factor 1 (HIF-1) plays a pivotal role in ischemic vascular responses, and its expression is induced by the prolyl hydroxylase inhibitor dimethyloxalylglycine (DMOG). We assessed whether preoperative stabilization of HIF-1 by systemic introduction of DMOG improves skin flap survival. Methods and Results Mice with ischemic skin flaps on the dorsum were treated intraperitoneally with DMOG 48 hr prior to surgery. The surviving area with neovascularization of the ischemic flaps was significantly greater in the DMOG-treated mice. Significantly fewer apoptotic cells were present in the ischemic flaps of DMOG-treated mice. Interestingly, marked increases in circulating endothelial progenitor cells (EPCs) and bone marrow proliferative progenitor cells were observed within 48 hr after DMOG treatment. Furthermore, heterozygous HIF-1α-deficient mice exhibited smaller surviving flap areas, fewer circulating EPCs, and larger numbers of apoptotic cells than did wild-type mice, while DMOG pretreatment of the mutant mice completely restored these parameters. Finally, reconstitution of wild-type mice with the heterozygous deficient bone marrow cells significantly decreased skin flap survival. Conclusion We demonstrated that transient activation of the HIF signaling pathway by a single systemic DMOG treatment upregulates not only anti-apoptotic pathways but also enhances neovascularization with concomitant increase in the numbers of bone marrow-derived progenitor cells.
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Affiliation(s)
- Mitsuru Takaku
- Department of Plastic and Reconstructive Surgery, The University of Tokushima Graduate School, Tokushima, Japan
| | - Shuhei Tomita
- Department of Pharmacology, The University of Tokushima Graduate School, Tokushima, Japan
- * E-mail:
| | - Hirotsugu Kurobe
- Department of Cardiovascular Surgery, The University of Tokushima Graduate School, Tokushima, Japan
| | - Yoshitaka Kihira
- Department of Pharmacology, The University of Tokushima Graduate School, Tokushima, Japan
| | - Atsushi Morimoto
- Department of Plastic and Reconstructive Surgery, The University of Tokushima Graduate School, Tokushima, Japan
| | - Mayuko Higashida
- Nutrition and Metabolism, Institute of Health Biosciences, The University of Tokushima Graduate School, Tokushima, Japan
| | - Yasumasa Ikeda
- Department of Pharmacology, The University of Tokushima Graduate School, Tokushima, Japan
| | - Akira Ushiyama
- Department of Environmental Health, National Institute of Public Health, Saitama, Japan
| | - Ichiro Hashimoto
- Department of Plastic and Reconstructive Surgery, The University of Tokushima Graduate School, Tokushima, Japan
| | - Hideki Nakanishi
- Department of Plastic and Reconstructive Surgery, The University of Tokushima Graduate School, Tokushima, Japan
| | - Toshiaki Tamaki
- Department of Pharmacology, The University of Tokushima Graduate School, Tokushima, Japan
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Núñez SC, França CM, Silva DFT, Nogueira GEC, Prates RA, Ribeiro MS. The influence of red laser irradiation timeline on burn healing in rats. Lasers Med Sci 2012; 28:633-41. [DOI: 10.1007/s10103-012-1105-4] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2012] [Accepted: 04/16/2012] [Indexed: 12/15/2022]
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Prabhakar NR, Semenza GL. Gaseous messengers in oxygen sensing. J Mol Med (Berl) 2012; 90:265-72. [PMID: 22349394 DOI: 10.1007/s00109-012-0876-1] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2012] [Revised: 01/30/2012] [Accepted: 02/01/2012] [Indexed: 12/23/2022]
Abstract
The carotid body is a sensory organ that detects acute changes in arterial blood oxygen (O(2)) levels and reflexly mediates systemic cardiac, vascular, and respiratory responses to hypoxia. This article provides a brief update of the roles of gas messengers as well as redox homeostasis by hypoxia-inducible factors (HIFs) in hypoxic sensing by the carotid body. Carbon monoxide (CO) and nitric oxide (NO), generated by heme oxygenase-2 (HO-2) and neuronal nitric oxide synthase (nNOS), respectively, inhibit carotid body activity. Molecular O(2) is a required substrate for the enzymatic activities of HO-2 and nNOS. Stimulation of carotid body activity by hypoxia may reflect reduced formation of CO and NO. Glomus cells, the site of O(2) sensing in the carotid body, express cystathionine γ-lyase (CSE), an H(2)S generating enzyme. Cth ( -/- ) mice, which lack CSE, exhibit severely impaired hypoxia-induced H(2)S generation, sensory excitation, and stimulation of breathing in response to low O(2). Hypoxia-evoked H(2)S generation in the carotid body requires the interaction of CSE with HO-2, which generates CO. Carotid bodies from Hif1a ( +/- ) mice with partial HIF-1α deficiency do not respond to hypoxia, whereas carotid bodies from mice with partial HIF-2α deficiency are hyper-responsive to hypoxia. The opposing roles of HIF-1α and HIF-2α in the carotid body have provided novel insight into molecular mechanisms of redox homeostasis and its role in hypoxia sensing. Heightened carotid body activity has been implicated in the pathogenesis of autonomic morbidities associated with sleep-disordered breathing, congestive heart failure, and essential hypertension. The enzymes that generate gas messengers and redox regulation by HIFs represent potential therapeutic targets for normalizing carotid body function and downstream autonomic output in these disease states.
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Affiliation(s)
- Nanduri R Prabhakar
- Institute for Integrative Physiology and Center for Systems Biology of O2 Sensing, The University of Chicago, Chicago, IL 60637, USA.
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Abstract
Oxygen homeostasis represents an organizing principle for understanding metazoan evolution, development, physiology, and pathobiology. The hypoxia-inducible factors (HIFs) are transcriptional activators that function as master regulators of oxygen homeostasis in all metazoan species. Rapid progress is being made in elucidating homeostatic roles of HIFs in many physiological systems, determining pathological consequences of HIF dysregulation in chronic diseases, and investigating potential targeting of HIFs for therapeutic purposes.
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Affiliation(s)
- Gregg L Semenza
- Vascular Program, Institute for Cell Engineering, Departments of Pediatrics, Medicine, Oncology, Radiation Oncology, and Biological Chemistry, McKusick-Nathans Institute of Genetic Medicine, The Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA.
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The role of hypoxia-inducible factors in oxygen sensing by the carotid body. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2012; 758:1-5. [PMID: 23080136 DOI: 10.1007/978-94-007-4584-1_1] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Chronic intermittent hypoxia (IH) associated with sleep-disordered breathing is an important cause of hypertension, which results from carotid body-mediated activation of the sympathetic nervous system. IH triggers increased levels of reactive oxygen species (ROS) in the carotid body, which induce increased synthesis and stability of hypoxia-inducible factor 1α (HIF-1α) and calpain-dependent degradation of HIF-2α. HIF-1 activates transcription of the Nox2 gene, encoding NADPH oxidase 2, which generates superoxide. Loss of HIF-2 activity leads to decreased transcription of the Sod2 gene, encoding manganese superoxide dismutase, which converts superoxide to hydrogen peroxide. Thus, IH disrupts the balance between HIF-1-dependent pro-oxidant and HIF-2-dependent anti-oxidant activities, and this loss of redox homeostasis underlies the pathogenesis of autonomic morbidities associated with IH.
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Rezvani HR, Ali N, Serrano-Sanchez M, Dubus P, Varon C, Ged C, Pain C, Cario-André M, Seneschal J, Taïeb A, de Verneuil H, Mazurier F. Loss of epidermal hypoxia-inducible factor-1α accelerates epidermal aging and affects re-epithelialization in human and mouse. J Cell Sci 2011; 124:4172-83. [PMID: 22193962 DOI: 10.1242/jcs.082370] [Citation(s) in RCA: 66] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2023] Open
Abstract
In mouse and human skin, HIF-1α is constitutively expressed in the epidermis, mainly in the basal layer. HIF-1α has been shown to have crucial systemic functions: regulation of kidney erythropoietin production in mice with constitutive HIF-1α epidermal deletion, and hypervascularity following epidermal HIF-1α overexpression. However, its local role in keratinocyte physiology has not been clearly defined. To address the function of HIF-1α in the epidermis, we used the mouse model of HIF-1α knockout targeted to keratinocytes (K14-Cre/Hif1a(flox/flox)). These mice had a delayed skin phenotype characterized by skin atrophy and pruritic inflammation, partly mediated by basement membrane disturbances involving laminin-332 (Ln-332) and integrins. We also investigated the relevance of results of studies in mice to human skin using reconstructed epidermis and showed that HIF-1α knockdown in human keratinocytes impairs the formation of a viable reconstructed epidermis. A diminution of keratinocyte growth potential, following HIF-1α silencing, was associated with a decreased expression of Ln-322 and α6 integrin and β1 integrin. Overall, these results indicate a role of HIF-1α in skin homeostasis especially during epidermal aging.
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Affiliation(s)
- Hamid Reza Rezvani
- INSERM, Biothérapies des maladies génétiques et cancers, U1035, 146 rue Léo Saignat, Bordeaux, F-33000 France
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