1
|
Juhász KZ, Hajdú T, Kovács P, Vágó J, Matta C, Takács R. Hypoxic Conditions Modulate Chondrogenesis through the Circadian Clock: The Role of Hypoxia-Inducible Factor-1α. Cells 2024; 13:512. [PMID: 38534356 DOI: 10.3390/cells13060512] [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: 01/15/2024] [Revised: 03/11/2024] [Accepted: 03/12/2024] [Indexed: 03/28/2024] Open
Abstract
Hypoxia-inducible factor-1 (HIF-1) is a heterodimer transcription factor composed of an alpha and a beta subunit. HIF-1α is a master regulator of cellular response to hypoxia by activating the transcription of genes that facilitate metabolic adaptation to hypoxia. Since chondrocytes in mature articular cartilage reside in a hypoxic environment, HIF-1α plays an important role in chondrogenesis and in the physiological lifecycle of articular cartilage. Accumulating evidence suggests interactions between the HIF pathways and the circadian clock. The circadian clock is an emerging regulator in both developing and mature chondrocytes. However, how circadian rhythm is established during the early steps of cartilage formation and through what signaling pathways it promotes the healthy chondrocyte phenotype is still not entirely known. This narrative review aims to deliver a concise analysis of the existing understanding of the dynamic interplay between HIF-1α and the molecular clock in chondrocytes, in states of both health and disease, while also incorporating creative interpretations. We explore diverse hypotheses regarding the intricate interactions among these pathways and propose relevant therapeutic strategies for cartilage disorders such as osteoarthritis.
Collapse
Affiliation(s)
- Krisztián Zoltán Juhász
- Department of Anatomy, Histology and Embryology, Faculty of Medicine, University of Debrecen, H-4032 Debrecen, Hungary
| | - Tibor Hajdú
- Department of Anatomy, Histology and Embryology, Faculty of Medicine, University of Debrecen, H-4032 Debrecen, Hungary
| | - Patrik Kovács
- Department of Anatomy, Histology and Embryology, Faculty of Medicine, University of Debrecen, H-4032 Debrecen, Hungary
| | - Judit Vágó
- Department of Anatomy, Histology and Embryology, Faculty of Medicine, University of Debrecen, H-4032 Debrecen, Hungary
| | - Csaba Matta
- Department of Anatomy, Histology and Embryology, Faculty of Medicine, University of Debrecen, H-4032 Debrecen, Hungary
| | - Roland Takács
- Department of Anatomy, Histology and Embryology, Faculty of Medicine, University of Debrecen, H-4032 Debrecen, Hungary
| |
Collapse
|
2
|
Mohammadi-Motlagh HR, Sadeghalvad M, Yavari N, Primavera R, Soltani S, Chetty S, Ganguly A, Regmi S, Fløyel T, Kaur S, Mirza AH, Thakor AS, Pociot F, Yarani R. β Cell and Autophagy: What Do We Know? Biomolecules 2023; 13:biom13040649. [PMID: 37189396 DOI: 10.3390/biom13040649] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2022] [Revised: 03/27/2023] [Accepted: 03/30/2023] [Indexed: 05/17/2023] Open
Abstract
Pancreatic β cells are central to glycemic regulation through insulin production. Studies show autophagy as an essential process in β cell function and fate. Autophagy is a catabolic cellular process that regulates cell homeostasis by recycling surplus or damaged cell components. Impaired autophagy results in β cell loss of function and apoptosis and, as a result, diabetes initiation and progress. It has been shown that in response to endoplasmic reticulum stress, inflammation, and high metabolic demands, autophagy affects β cell function, insulin synthesis, and secretion. This review highlights recent evidence regarding how autophagy can affect β cells' fate in the pathogenesis of diabetes. Furthermore, we discuss the role of important intrinsic and extrinsic autophagy modulators, which can lead to β cell failure.
Collapse
Affiliation(s)
- Hamid-Reza Mohammadi-Motlagh
- Medical Biology Research Center, Health Technology Institute, Kermanshah University of Medical Sciences, Kermanshah 67155-1616, Iran
| | - Mona Sadeghalvad
- Department of Immunology, School of Medicine, Tehran University of Medical Sciences, Tehran 1416634793, Iran
| | - Niloofar Yavari
- Department of Cellular and Molecular Medicine, The Panum Institute, Faculty of Health and Medical Sciences, University of Copenhagen, 2200 Copenhagen, Denmark
| | - Rosita Primavera
- Interventional Regenerative Innovation at Stanford (IRIS), Department of Radiology, Stanford University School of Medicine, Palo Alto, CA 94304, USA
| | - Setareh Soltani
- Clinical Research Development Center, Taleghani and Imam Ali Hospital, Kermanshah University of Medical Sciences, Kermanshah 67145-1673, Iran
| | - Shashank Chetty
- Interventional Regenerative Innovation at Stanford (IRIS), Department of Radiology, Stanford University School of Medicine, Palo Alto, CA 94304, USA
| | - Abantika Ganguly
- Interventional Regenerative Innovation at Stanford (IRIS), Department of Radiology, Stanford University School of Medicine, Palo Alto, CA 94304, USA
| | - Shobha Regmi
- Interventional Regenerative Innovation at Stanford (IRIS), Department of Radiology, Stanford University School of Medicine, Palo Alto, CA 94304, USA
| | - Tina Fløyel
- Translational Type 1 Diabetes Research, Department of Clinical Research, Steno Diabetes Center Copenhagen, 2730 Herlev, Denmark
| | - Simranjeet Kaur
- Translational Type 1 Diabetes Research, Department of Clinical Research, Steno Diabetes Center Copenhagen, 2730 Herlev, Denmark
| | - Aashiq H Mirza
- Translational Type 1 Diabetes Research, Department of Clinical Research, Steno Diabetes Center Copenhagen, 2730 Herlev, Denmark
- Department of Pharmacology, Weill Cornell Medicine, New York, NY 10065, USA
| | - Avnesh S Thakor
- Interventional Regenerative Innovation at Stanford (IRIS), Department of Radiology, Stanford University School of Medicine, Palo Alto, CA 94304, USA
| | - Flemming Pociot
- Translational Type 1 Diabetes Research, Department of Clinical Research, Steno Diabetes Center Copenhagen, 2730 Herlev, Denmark
- Institute for Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, 2200 Copenhagen, Denmark
| | - Reza Yarani
- Interventional Regenerative Innovation at Stanford (IRIS), Department of Radiology, Stanford University School of Medicine, Palo Alto, CA 94304, USA
- Translational Type 1 Diabetes Research, Department of Clinical Research, Steno Diabetes Center Copenhagen, 2730 Herlev, Denmark
| |
Collapse
|
3
|
Alberding JP, Secomb TW. Simulation of Angiogenesis in Three Dimensions: Development of the Retinal Circulation. Bull Math Biol 2023; 85:27. [PMID: 36842140 DOI: 10.1007/s11538-023-01126-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2022] [Accepted: 01/09/2023] [Indexed: 02/27/2023]
Abstract
A theoretical model is used to describe the three-dimensional development of the retinal circulation in the human eye, which occurs after the initial spread of vasculature across the inner surface of the retina. In the model, random sprouting angiogenesis is driven by a growth factor that is produced in tissue at a rate dependent on oxygen level and diffuses to existing vessels. Vessel sprouts connect to form pathways for blood flow and undergo remodeling and pruning. These processes are controlled by known or hypothesized vascular responses to hemodynamic and biochemical stimuli, including conducted responses along vessel walls. The model shows regression of arterio-venous connections on the surface of the retina, allowing perfusion of the underlying tissue. A striking feature of the retinal circulation is the formation of two vascular plexuses located at the inner and outer surfaces of the inner nuclear layer within the retina. The model is used to test hypotheses regarding the formation of these structures. A mechanism based on local production and diffusion of growth factor is shown to be ineffective. However, sprout guidance by localized structures on the boundaries of the inner nuclear layer can account for plexus formation. The resulting networks have vascular density, perfusion and oxygen transport characteristics consistent with observed properties. The model shows how stochastic generation of vascular sprouts combined with a set of biologically based response mechanisms can lead to the generation of a specialized three-dimensional vascular structure with a high degree of organization.
Collapse
Affiliation(s)
| | - Timothy W Secomb
- BIO5 Institute, University of Arizona, Tucson, AZ, 85724, USA.
- Department of Physiology, University of Arizona, Tucson, AZ, 85724, USA.
| |
Collapse
|
4
|
Tee CCL, Cooke MB, Chong MC, Yeo WK, Camera DM. Mechanisms for Combined Hypoxic Conditioning and Divergent Exercise Modes to Regulate Inflammation, Body Composition, Appetite, and Blood Glucose Homeostasis in Overweight and Obese Adults: A Narrative Review. Sports Med 2023; 53:327-348. [PMID: 36441492 PMCID: PMC9877079 DOI: 10.1007/s40279-022-01782-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/09/2022] [Indexed: 11/29/2022]
Abstract
Obesity is a major global health issue and a primary risk factor for metabolic-related disorders. While physical inactivity is one of the main contributors to obesity, it is a modifiable risk factor with exercise training as an established non-pharmacological treatment to prevent the onset of metabolic-related disorders, including obesity. Exposure to hypoxia via normobaric hypoxia (simulated altitude via reduced inspired oxygen fraction), termed hypoxic conditioning, in combination with exercise has been increasingly shown in the last decade to enhance blood glucose regulation and decrease the body mass index, providing a feasible strategy to treat obesity. However, there is no current consensus in the literature regarding the optimal combination of exercise variables such as the mode, duration, and intensity of exercise, as well as the level of hypoxia to maximize fat loss and overall body compositional changes with hypoxic conditioning. In this narrative review, we discuss the effects of such diverse exercise and hypoxic variables on the systematic and myocellular mechanisms, along with physiological responses, implicated in the development of obesity. These include markers of appetite regulation and inflammation, body conformational changes, and blood glucose regulation. As such, we consolidate findings from human studies to provide greater clarity for implementing hypoxic conditioning with exercise as a safe, practical, and effective treatment strategy for obesity.
Collapse
Affiliation(s)
- Chris Chow Li Tee
- Division of Research and Innovation, National Sports Institute of Malaysia, Kuala Lumpur, Malaysia
- Sport and Exercise Medicine Group, Swinburne University, Room SPW224, Mail H21, PO Box 218, Hawthorn, VIC, 3122, Australia
| | - Matthew B Cooke
- Sport and Exercise Medicine Group, Swinburne University, Room SPW224, Mail H21, PO Box 218, Hawthorn, VIC, 3122, Australia
| | - Mee Chee Chong
- Sport and Exercise Medicine Group, Swinburne University, Room SPW224, Mail H21, PO Box 218, Hawthorn, VIC, 3122, Australia
| | - Wee Kian Yeo
- Division of Research and Innovation, National Sports Institute of Malaysia, Kuala Lumpur, Malaysia
| | - Donny M Camera
- Sport and Exercise Medicine Group, Swinburne University, Room SPW224, Mail H21, PO Box 218, Hawthorn, VIC, 3122, Australia.
| |
Collapse
|
5
|
Florentin J, O'Neil SP, Ohayon LL, Uddin A, Vasamsetti SB, Arunkumar A, Ghosh S, Boatz JC, Sui J, Kliment CR, Chan SY, Dutta P. VEGF Receptor 1 Promotes Hypoxia-Induced Hematopoietic Progenitor Proliferation and Differentiation. Front Immunol 2022; 13:882484. [PMID: 35634304 PMCID: PMC9133347 DOI: 10.3389/fimmu.2022.882484] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2022] [Accepted: 04/19/2022] [Indexed: 11/13/2022] Open
Abstract
Although it is well known that hypoxia incites unleashed cellular inflammation, the mechanisms of exaggerated cellular inflammation in hypoxic conditions are not known. We observed augmented proliferation of hematopoietic stem and progenitor cells (HSPC), precursors of inflammatory leukocytes, in mice under hypoxia. Consistently, a transcriptomic analysis of human HSPC exposed to hypoxic conditions revealed elevated expression of genes involved in progenitor proliferation and differentiation. Additionally, bone marrow cells in mice expressed high amount of vascular endothelial growth factor (VEGF), and HSPC elevated VEGF receptor 1 (VEGFr1) and its target genes in hypoxic conditions. In line with this, VEGFr1 blockade in vivo and in vitro decreased HSPC proliferation and attenuated inflammation. In silico and ChIP experiments demonstrated that HIF-1α binds to the promoter region of VEGFR1. Correspondingly, HIF1a silencing decreased VEGFr1 expression in HSPC and diminished their proliferation. These results indicate that VEGF signaling in HSPC is an important mediator of their proliferation and differentiation in hypoxia-induced inflammation and represents a potential therapeutic target to prevent aberrant inflammation in hypoxia-associated diseases.
Collapse
Affiliation(s)
- Jonathan Florentin
- Division of Cardiology, Department of Medicine, Pittsburgh Heart, Lung, Blood, and Vascular Medicine Institute, University of Pittsburgh Medical Center, University of Pittsburgh School of Medicine, Pittsburgh, PA, United States
| | - Scott P O'Neil
- Division of Cardiology, Department of Medicine, Pittsburgh Heart, Lung, Blood, and Vascular Medicine Institute, University of Pittsburgh Medical Center, University of Pittsburgh School of Medicine, Pittsburgh, PA, United States
| | - Lee L Ohayon
- Division of Cardiology, Department of Medicine, Pittsburgh Heart, Lung, Blood, and Vascular Medicine Institute, University of Pittsburgh Medical Center, University of Pittsburgh School of Medicine, Pittsburgh, PA, United States
| | - Afaz Uddin
- Division of Cardiology, Department of Medicine, Pittsburgh Heart, Lung, Blood, and Vascular Medicine Institute, University of Pittsburgh Medical Center, University of Pittsburgh School of Medicine, Pittsburgh, PA, United States
| | - Sathish Babu Vasamsetti
- Division of Cardiology, Department of Medicine, Pittsburgh Heart, Lung, Blood, and Vascular Medicine Institute, University of Pittsburgh Medical Center, University of Pittsburgh School of Medicine, Pittsburgh, PA, United States
| | - Anagha Arunkumar
- Division of Cardiology, Department of Medicine, Pittsburgh Heart, Lung, Blood, and Vascular Medicine Institute, University of Pittsburgh Medical Center, University of Pittsburgh School of Medicine, Pittsburgh, PA, United States
| | - Samit Ghosh
- Department of Medicine, Division of Pulmonary and Critical Care, University of Pittsburgh, Pittsburgh, PA, United States
| | - Jennifer C Boatz
- Department of Medicine, Division of Pulmonary and Critical Care, University of Pittsburgh, Pittsburgh, PA, United States
| | - Justin Sui
- Department of Medicine, Division of Pulmonary and Critical Care, University of Pittsburgh, Pittsburgh, PA, United States
| | - Corrine R Kliment
- Department of Medicine, Division of Pulmonary and Critical Care, University of Pittsburgh, Pittsburgh, PA, United States
| | - Stephen Y Chan
- Division of Cardiology, Department of Medicine, Pittsburgh Heart, Lung, Blood, and Vascular Medicine Institute, University of Pittsburgh Medical Center, University of Pittsburgh School of Medicine, Pittsburgh, PA, United States
| | - Partha Dutta
- Division of Cardiology, Department of Medicine, Pittsburgh Heart, Lung, Blood, and Vascular Medicine Institute, University of Pittsburgh Medical Center, University of Pittsburgh School of Medicine, Pittsburgh, PA, United States
- Department of Immunology, University of Pittsburgh School of Medicine, Pittsburgh, PA, United States
| |
Collapse
|
6
|
Zeb1 Regulation of Wound Healing-Induced Inflammation in Alkali-Damaged Corneas. iScience 2022; 25:104038. [PMID: 35340433 PMCID: PMC8941209 DOI: 10.1016/j.isci.2022.104038] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2021] [Revised: 12/24/2021] [Accepted: 03/03/2022] [Indexed: 11/22/2022] Open
Abstract
The cornea is an avascular tissue for vision clarity. Alkali burn could cause severe traumatic damage on the cornea with inflammation and neovascularization (NV), leading to vision reduction and blindness. Mechanisms underlying corneal inflammation and NV are not as clear. We previously reported that Zeb1 is an important factor in corneal NV, and we sought to clarify whether it is also involved in regulation of corneal inflammation. We analyzed the alkali burn-induced corneal inflammation and wound healing in both Zeb1+/+ and Zeb1−/+ littermates through a multidisciplinary approach. We provide evidence that Zeb1 forms a positive regulatory loop with Tgfb to regulate early corneal inflammation by maintenance of immune cell viability and mobility and later wound healing by activation of both Nf-κb and Tgfb-related Stat3 signaling pathways. We believe that ZEB1 is a potential therapeutic target, and inactivation of ZEB1 could be a strategy to treat severe corneal inflammation condition. Traumatic wound induces inflammation in the cornea, resulting in vision reduction Zeb1 is a key factor to retain immune cell viability, mobility, and cytokine expression Zeb1 regulates cytokine gene expression through both Nf-κb and Stat3 pathways Inactivation of ZEB1 could be a strategy to treat severe corneal inflammation condition
Collapse
|
7
|
Farzin A, Hassan S, Teixeira LSM, Gurian M, Crispim JF, Manhas V, Carlier A, Bae H, Geris L, Noshadi I, Shin SR, Leijten J. Self-Oxygenation of Tissues Orchestrates Full-Thickness Vascularization of Living Implants. ADVANCED FUNCTIONAL MATERIALS 2021; 31:2100850. [PMID: 34924912 PMCID: PMC8680410 DOI: 10.1002/adfm.202100850] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2021] [Indexed: 05/13/2023]
Abstract
Bioengineering of tissues and organs has the potential to generate functional replacement organs. However, achieving the full-thickness vascularization that is required for long-term survival of living implants has remained a grand challenge, especially for clinically sized implants. During the pre-vascular phase, implanted engineered tissues are forced to metabolically rely on the diffusion of nutrients from adjacent host-tissue, which for larger living implants results in anoxia, cell death, and ultimately implant failure. Here it is reported that this challenge can be addressed by engineering self-oxygenating tissues, which is achieved via the incorporation of hydrophobic oxygen-generating micromaterials into engineered tissues. Self-oxygenation of tissues transforms anoxic stresses into hypoxic stimulation in a homogenous and tissue size-independent manner. The in situ elevation of oxygen tension enables the sustained production of high quantities of angiogenic factors by implanted cells, which are offered a metabolically protected pro-angiogenic microenvironment. Numerical simulations predict that self-oxygenation of living tissues will effectively orchestrate rapid full-thickness vascularization of implanted tissues, which is empirically confirmed via in vivo experimentation. Self-oxygenation of tissues thus represents a novel, effective, and widely applicable strategy to enable the vascularization living implants, which is expected to advance organ transplantation and regenerative medicine applications.
Collapse
Affiliation(s)
- Ali Farzin
- Division of Engineering in Medicine Department of Medicine Brigham and Women's Hospital Harvard Medical School Cambridge, MA 02139, USA
| | - Shabir Hassan
- Division of Engineering in Medicine Department of Medicine Brigham and Women's Hospital Harvard Medical School Cambridge, MA 02139, USA
| | - Liliana S Moreira Teixeira
- Department of Developmental BioEngineering Technical Medical Centre University of Twente Enschede, The Netherlands
| | - Melvin Gurian
- Department of Developmental BioEngineering Technical Medical Centre University of Twente Enschede, The Netherlands
| | - João F Crispim
- Department of Developmental BioEngineering Technical Medical CentreUniversity of Twente Enschede, The Netherlands
| | - Varun Manhas
- Biomechanics Research Unit GIGA In Silico Medicine University of Liège Chemin des Chevreuils 1, B52/3, Liège 4000, Belgium
| | - Aurélie Carlier
- Laboratory for Cell Biology-Inspired Tissue Engineering MERLN Institute University of Maastricht Maastricht, The Netherlands
| | - Hojae Bae
- KU Convergence Science and Technology Institute Department of Stem Cell and Regenerative Biotechnology Konkuk University Seoul 05029, Republic of Korea
| | - Liesbet Geris
- Biomechanics Research Unit GIGA In Silico Medicine University of Liège Chemin des Chevreuils 1, B52/3, Liège 4000, Belgium
| | - Iman Noshadi
- Department of Bioengineering University of California Riverside, CA 92521, USA
| | - Su Ryon Shin
- Division of Engineering in Medicine Department of Medicine Brigham and Women's Hospital Harvard Medical School Cambridge, MA 02139, USA
| | - Jeroen Leijten
- Division of Engineering in Medicine Department of Medicine Brigham and Women's Hospital Harvard Medical School Cambridge, MA 02139, USA
| |
Collapse
|
8
|
Lemieux P, Birot O. Altitude, Exercise, and Skeletal Muscle Angio-Adaptive Responses to Hypoxia: A Complex Story. Front Physiol 2021; 12:735557. [PMID: 34552509 PMCID: PMC8450406 DOI: 10.3389/fphys.2021.735557] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2021] [Accepted: 08/16/2021] [Indexed: 12/18/2022] Open
Abstract
Hypoxia, defined as a reduced oxygen availability, can be observed in many tissues in response to various physiological and pathological conditions. As a hallmark of the altitude environment, ambient hypoxia results from a drop in the oxygen pressure in the atmosphere with elevation. A hypoxic stress can also occur at the cellular level when the oxygen supply through the local microcirculation cannot match the cells’ metabolic needs. This has been suggested in contracting skeletal myofibers during physical exercise. Regardless of its origin, ambient or exercise-induced, muscle hypoxia triggers complex angio-adaptive responses in the skeletal muscle tissue. These can result in the expression of a plethora of angio-adaptive molecules, ultimately leading to the growth, stabilization, or regression of muscle capillaries. This remarkable plasticity of the capillary network is referred to as angio-adaptation. It can alter the capillary-to-myofiber interface, which represent an important determinant of skeletal muscle function. These angio-adaptive molecules can also be released in the circulation as myokines to act on distant tissues. This review addresses the respective and combined potency of ambient hypoxia and exercise to generate a cellular hypoxic stress in skeletal muscle. The major skeletal muscle angio-adaptive responses to hypoxia so far described in this context will be discussed, including existing controversies in the field. Finally, this review will highlight the molecular complexity of the skeletal muscle angio-adaptive response to hypoxia and identify current gaps of knowledges in this field of exercise and environmental physiology.
Collapse
Affiliation(s)
- Pierre Lemieux
- Muscle Health Research Centre, School of Kinesiology and Health Science, York University, Toronto, ON, Canada
| | - Olivier Birot
- Muscle Health Research Centre, School of Kinesiology and Health Science, York University, Toronto, ON, Canada
| |
Collapse
|
9
|
Simulation of angiogenesis in three dimensions: Application to cerebral cortex. PLoS Comput Biol 2021; 17:e1009164. [PMID: 34170925 PMCID: PMC8266096 DOI: 10.1371/journal.pcbi.1009164] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2021] [Revised: 07/08/2021] [Accepted: 06/08/2021] [Indexed: 12/20/2022] Open
Abstract
The vasculature is a dynamic structure, growing and regressing in response to embryonic development, growth, changing physiological demands, wound healing, tumor growth and other stimuli. At the microvascular level, network geometry is not predetermined, but emerges as a result of biological responses of each vessel to the stimuli that it receives. These responses may be summarized as angiogenesis, remodeling and pruning. Previous theoretical simulations have shown how two-dimensional vascular patterns generated by these processes in the mesentery are consistent with experimental observations. During early development of the brain, a mesh-like network of vessels is formed on the surface of the cerebral cortex. This network then forms branches into the cortex, forming a three-dimensional network throughout its thickness. Here, a theoretical model is presented for this process, based on known or hypothesized vascular response mechanisms together with experimentally obtained information on the structure and hemodynamics of the mouse cerebral cortex. According to this model, essential components of the system include sensing of oxygen levels in the midrange of partial pressures and conducted responses in vessel walls that propagate information about metabolic needs of the tissue to upstream segments of the network. The model provides insights into the effects of deficits in vascular response mechanisms, and can be used to generate physiologically realistic microvascular network structures.
Collapse
|
10
|
Younis I. Dehisced abdominal wall reconstruction. J Wound Care 2021; 29:S29-S30. [PMID: 32427032 DOI: 10.12968/jowc.2020.29.sup5b.s29] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Ibby Younis
- Consultant Plastic and Reconstructive Surgeon, Royal Free London NHS Foundation Trust, London, UK
| |
Collapse
|
11
|
Kirschneck C, Thuy M, Leikam A, Memmert S, Deschner J, Damanaki A, Spanier G, Proff P, Jantsch J, Schröder A. Role and Regulation of Mechanotransductive HIF-1α Stabilisation in Periodontal Ligament Fibroblasts. Int J Mol Sci 2020; 21:ijms21249530. [PMID: 33333756 PMCID: PMC7765204 DOI: 10.3390/ijms21249530] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2020] [Revised: 12/07/2020] [Accepted: 12/10/2020] [Indexed: 12/28/2022] Open
Abstract
Orthodontic tooth movement (OTM) creates compressive and tensile strain in the periodontal ligament, causing circulation disorders. Hypoxia-inducible factor 1α (HIF-1α) has been shown to be primarily stabilised by compression, but not hypoxia in periodontal ligament fibroblasts (PDLF) during mechanical strain, which are key regulators of OTM. This study aimed to elucidate the role of heparan sulfate integrin interaction and downstream kinase phosphorylation for HIF-1α stabilisation under compressive and tensile strain and to which extent downstream synthesis of VEGF and prostaglandins is HIF-1α-dependent in a model of simulated OTM in PDLF. PDLF were subjected to compressive or tensile strain for 48 h. In various setups HIF-1α was experimentally stabilised (DMOG) or destabilised (YC-1) and mechanotransduction was inhibited by surfen and genistein. We found that HIF-1α was not stabilised by tensile, but rather by compressive strain. HIF-1α stabilisation had an inductive effect on prostaglandin and VEGF synthesis. As expected, HIF-1α destabilisation reduced VEGF expression, whereas prostaglandin synthesis was increased. Inhibition of integrin mechanotransduction via surfen or genistein prevented stabilisation of HIF-1α. A decrease in VEGF expression was observed, but not in prostaglandin synthesis. Stabilisation of HIF-1α via integrin mechanotransduction and downstream phosphorylation of kinases seems to be essential for the induction of VEGF, but not prostaglandin synthesis by PDLF during compressive (but not tensile) orthodontic strain.
Collapse
Affiliation(s)
- Christian Kirschneck
- Department of Orthodontics, University Hospital Regensburg, 93053 Regensburg, Germany; (M.T.); (A.L.); (P.P.); (A.S.)
- Correspondence: ; Tel.: +49-941-944-6093
| | - Magdalena Thuy
- Department of Orthodontics, University Hospital Regensburg, 93053 Regensburg, Germany; (M.T.); (A.L.); (P.P.); (A.S.)
| | - Alexandra Leikam
- Department of Orthodontics, University Hospital Regensburg, 93053 Regensburg, Germany; (M.T.); (A.L.); (P.P.); (A.S.)
| | - Svenja Memmert
- Department of Orthodontics, University of Bonn, 53111 Bonn, Germany;
| | - James Deschner
- Department of Periodontology and Operative Dentistry, University of Mainz, 55131 Mainz, Germany; (J.D.); (A.D.)
| | - Anna Damanaki
- Department of Periodontology and Operative Dentistry, University of Mainz, 55131 Mainz, Germany; (J.D.); (A.D.)
| | - Gerrit Spanier
- Department of Cranio-Maxillo-Facial Surgery, University Hospital Regensburg, 93053 Regensburg, Germany;
| | - Peter Proff
- Department of Orthodontics, University Hospital Regensburg, 93053 Regensburg, Germany; (M.T.); (A.L.); (P.P.); (A.S.)
| | - Jonathan Jantsch
- Institute of Clinical Microbiology and Hygiene, University Hospital Regensburg, 93053 Regensburg, Germany;
| | - Agnes Schröder
- Department of Orthodontics, University Hospital Regensburg, 93053 Regensburg, Germany; (M.T.); (A.L.); (P.P.); (A.S.)
| |
Collapse
|
12
|
Masciangelo R, Chiti MC, Philippart C, Amorim CA, Donnez J, Camboni A, Dolmans MM. Follicle populations and vascularization in ovarian tissue of pediatric patients before and after long-term grafting. Fertil Steril 2020; 114:1330-1338. [DOI: 10.1016/j.fertnstert.2020.06.031] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2020] [Revised: 06/04/2020] [Accepted: 06/23/2020] [Indexed: 12/21/2022]
|
13
|
Nair HKR. Non-healing venous leg ulcer. J Wound Care 2020; 29:S26-S27. [DOI: 10.12968/jowc.2020.29.sup5b.s26] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|
14
|
Boey J. Arteriovenous foot ulcer. J Wound Care 2020; 29:S24-S25. [PMID: 32427029 DOI: 10.12968/jowc.2020.29.sup5b.s24] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|
15
|
Boey J. Delayed healing following amputation of the fifth ray. J Wound Care 2020; 29:S23-S24. [PMID: 32427028 DOI: 10.12968/jowc.2020.29.sup5b.s23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Johnson Boey
- Podiatrist, Singapore General Hospital, Singapore
| |
Collapse
|
16
|
Abstract
Not only does oxygen play an essential role in each stage of the wound healing process. It also helps to increases host resistance to infection. Any impairment to the oxygen supply can therefore delay healing. This article explores the affects of oxygen on the wound cells and tissue, and explains how an adequate supply is required for granulation tissue formation and epithelialisation to occur
Collapse
Affiliation(s)
- Ibby Younis
- Consultant Plastic and Reconstructive Surgeon, Royal Free London NHS Foundation Trust, London, UK
| |
Collapse
|
17
|
Hicks L. Diabetic foot ulcer with osteomyelitis. J Wound Care 2020; 29:S27-S29. [DOI: 10.12968/jowc.2020.29.sup5b.s27] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Linda Hicks
- Advanced Podiatrist, County Durham and Darlington NHS Foundation Trust, Darlington, UK
| |
Collapse
|
18
|
Lalwani A, Warren J, Liuwantara D, Hawthorne WJ, O'Connell PJ, Gonzalez FJ, Stokes RA, Chen J, Laybutt DR, Craig ME, Swarbrick MM, King C, Gunton JE. β Cell Hypoxia-Inducible Factor-1α Is Required for the Prevention of Type 1 Diabetes. Cell Rep 2019; 27:2370-2384.e6. [PMID: 31116982 PMCID: PMC6661122 DOI: 10.1016/j.celrep.2019.04.086] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2018] [Revised: 01/31/2019] [Accepted: 04/18/2019] [Indexed: 12/28/2022] Open
Abstract
The development of autoimmune disease type 1 diabetes (T1D) is determined by both genetic background and environmental factors. Environmental triggers include RNA viruses, particularly coxsackievirus (CV), but how they induce T1D is not understood. Here, we demonstrate that deletion of the transcription factor hypoxia-inducible factor-1α (HIF-1α) from β cells increases the susceptibility of non-obese diabetic (NOD) mice to environmentally triggered T1D from coxsackieviruses and the β cell toxin streptozotocin. Similarly, knockdown of HIF-1α in human islets leads to a poorer response to coxsackievirus infection. Studies in coxsackievirus-infected islets demonstrate that lack of HIF-1α leads to impaired viral clearance, increased viral load, inflammation, pancreatitis, and loss of β cell mass. These findings show an important role for β cells and, specifically, lack of β cell HIF-1α in the development of T1D. These data suggest new strategies for the prevention of T1D.
Collapse
Affiliation(s)
- Amit Lalwani
- Center for Diabetes, Obesity, and Endocrinology (CDOE), The Westmead Institute for Medical Research (WIMR), The University of Sydney, Sydney, NSW, Australia; Faculty of Medicine and Health, The University of Sydney, Sydney, NSW, Australia
| | - Joanna Warren
- Mucosal Autoimmunity, Garvan Institute of Medical Research, Sydney, NSW, Australia
| | - David Liuwantara
- National Pancreas Transplant Unit (NPTU), Westmead Hospital, Sydney, NSW, Australia
| | - Wayne J Hawthorne
- Faculty of Medicine and Health, The University of Sydney, Sydney, NSW, Australia; National Pancreas Transplant Unit (NPTU), Westmead Hospital, Sydney, NSW, Australia
| | - Philip J O'Connell
- National Pancreas Transplant Unit (NPTU), Westmead Hospital, Sydney, NSW, Australia
| | - Frank J Gonzalez
- Laboratory of Metabolism, National Cancer Institute, Bethesda, MD, USA
| | - Rebecca A Stokes
- Center for Diabetes, Obesity, and Endocrinology (CDOE), The Westmead Institute for Medical Research (WIMR), The University of Sydney, Sydney, NSW, Australia
| | - Jennifer Chen
- Center for Diabetes, Obesity, and Endocrinology (CDOE), The Westmead Institute for Medical Research (WIMR), The University of Sydney, Sydney, NSW, Australia
| | - D Ross Laybutt
- Islet Biology, Garvan Institute of Medical Research, Sydney, NSW, Australia
| | - Maria E Craig
- Faculty of Medicine and Health, The University of Sydney, Sydney, NSW, Australia; The Children's Hospital at Westmead, Sydney, NSW, Australia; School of Women's and Children's Health, University of New South Wales, Kensington, NSW, Australia
| | - Michael M Swarbrick
- Center for Diabetes, Obesity, and Endocrinology (CDOE), The Westmead Institute for Medical Research (WIMR), The University of Sydney, Sydney, NSW, Australia; School of Medical Sciences, University of New South Wales, Kensington, NSW, Australia
| | - Cecile King
- Mucosal Autoimmunity, Garvan Institute of Medical Research, Sydney, NSW, Australia
| | - Jenny E Gunton
- Center for Diabetes, Obesity, and Endocrinology (CDOE), The Westmead Institute for Medical Research (WIMR), The University of Sydney, Sydney, NSW, Australia; Faculty of Medicine and Health, The University of Sydney, Sydney, NSW, Australia; St Vincent's Clinical School, University of New South Wales, Kensington, NSW, Australia; Department of Diabetes and Endocrinology, Westmead Hospital, Sydney, NSW, Australia.
| |
Collapse
|
19
|
Tsai H, Miao Z, Chen Y, Huang C, Yeh Y, Yang I, Wang J. miR-148a inhibits early relapsed colorectal cancers and the secretion of VEGF by indirectly targeting HIF-1α under non-hypoxia/hypoxia conditions. J Cell Mol Med 2019; 23:3572-3582. [PMID: 30834693 PMCID: PMC6484316 DOI: 10.1111/jcmm.14257] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2018] [Revised: 02/11/2019] [Accepted: 02/12/2019] [Indexed: 12/15/2022] Open
Abstract
Vascular endothelial growth factor (VEGF) is correlated with angiogenesis and early relapse of colorectal cancer (CRC). This study investigated the role of miR-148a in the regulation of VEGF/angiogenesis and early relapse of CRC. We established a stable clone with miR-148a expression in HCT116 and HT29 cell lines and created a hypoxic condition by using CoCl2 to determine the underlying mechanism of miR-148a. The effects of miR-148a on the phosphoryl-ERK (pERK)/hypoxia-inducible factor-1α (HIF-1α)/VEGF pathway were evaluated through Western blotting and the inhibitory effect of miR-148a on angiogenesis was demonstrated through a tube formation assay. Sixty-three CRC tissues (28 early relapse and 35 non-early relapse) were analysed to assess the relationship between miR-148a and HIF-1α/VEGF. The protein expression of pERK/HIF-1α/VEGF in HCT116 and HT29 cells was significantly decreased by miR-148a (all P < 0.05). The protein expression of VEGF/HIF-1α was strongly inversely associated with the expression of miR-148a in the 63 CRC tissue samples (all P < 0.05). Tube formation assay demonstrated that miR-148a significantly obliterated angiogenesis. miR-148a suppresses VEGF through down-regulation of the pERK/HIF-1α/VEGF pathway and might lead to the inhibition of angiogenesis; miR-148a down-regulation increased the early relapse rate of CRC. This demonstrates that miR-148a is a potential diagnostic and therapeutic target.
Collapse
Affiliation(s)
- Hsiang‐Lin Tsai
- Division of Colorectal Surgery, Department of SurgeryKaohsiung Medical University Hospital, Kaohsiung Medical UniversityKaohsiungTaiwan
- Department of Surgery, Faculty of Medicine, College of MedicineKaohsiung Medical UniversityKaohsiungTaiwan
| | - Zhi‐Feng Miao
- Division of Colorectal Surgery, Department of SurgeryKaohsiung Medical University Hospital, Kaohsiung Medical UniversityKaohsiungTaiwan
- Department of Medical ResearchKaohsiung Medical University HospitalKaohsiungTaiwan
| | - Yi‐Ting Chen
- Department of PathologyKaohsiung Medical University Hospital, Kaohsiung Medical UniversityKaohsiungTaiwan
- Department of Pathology, Faculty of MedicineCollege of Medicine, Kaohsiung Medical UniversityKaohsiungTaiwan
- Graduate Institute of Medicine, College of Medicine, Kaohsiung Medical UniversityKaohsiungTaiwan
| | - Ching‐Wen Huang
- Division of Colorectal Surgery, Department of SurgeryKaohsiung Medical University Hospital, Kaohsiung Medical UniversityKaohsiungTaiwan
- Department of Surgery, Faculty of Medicine, College of MedicineKaohsiung Medical UniversityKaohsiungTaiwan
- Graduate Institute of Medicine, College of Medicine, Kaohsiung Medical UniversityKaohsiungTaiwan
| | - Yung‐Sung Yeh
- Division of Colorectal Surgery, Department of SurgeryKaohsiung Medical University Hospital, Kaohsiung Medical UniversityKaohsiungTaiwan
- Graduate Institute of Clinical Medicine, College of Medicine, Kaohsiung Medical UniversityKaohsiungTaiwan
- Division of Trauma and Surgical Critical Care, Department of SurgeryKaohsiung Medical University Hospital, Kaohsiung Medical UniversityKaohsiungTaiwan
| | - I‐Ping Yang
- Department of Nursing, Shu‐Zen College of Medicine and ManagementKaohsiungTaiwan
| | - Jaw‐Yuan Wang
- Division of Colorectal Surgery, Department of SurgeryKaohsiung Medical University Hospital, Kaohsiung Medical UniversityKaohsiungTaiwan
- Department of Surgery, Faculty of Medicine, College of MedicineKaohsiung Medical UniversityKaohsiungTaiwan
- Graduate Institute of Medicine, College of Medicine, Kaohsiung Medical UniversityKaohsiungTaiwan
- Graduate Institute of Clinical Medicine, College of Medicine, Kaohsiung Medical UniversityKaohsiungTaiwan
| |
Collapse
|
20
|
Keeley TP, Mann GE. Defining Physiological Normoxia for Improved Translation of Cell Physiology to Animal Models and Humans. Physiol Rev 2019; 99:161-234. [PMID: 30354965 DOI: 10.1152/physrev.00041.2017] [Citation(s) in RCA: 179] [Impact Index Per Article: 35.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
The extensive oxygen gradient between the air we breathe (Po2 ~21 kPa) and its ultimate distribution within mitochondria (as low as ~0.5-1 kPa) is testament to the efforts expended in limiting its inherent toxicity. It has long been recognized that cell culture undertaken under room air conditions falls short of replicating this protection in vitro. Despite this, difficulty in accurately determining the appropriate O2 levels in which to culture cells, coupled with a lack of the technology to replicate and maintain a physiological O2 environment in vitro, has hindered addressing this issue thus far. In this review, we aim to address the current understanding of tissue Po2 distribution in vivo and summarize the attempts made to replicate these conditions in vitro. The state-of-the-art techniques employed to accurately determine O2 levels, as well as the issues associated with reproducing physiological O2 levels in vitro, are also critically reviewed. We aim to provide the framework for researchers to undertake cell culture under O2 levels relevant to specific tissues and organs. We envisage that this review will facilitate a paradigm shift, enabling translation of findings under physiological conditions in vitro to disease pathology and the design of novel therapeutics.
Collapse
Affiliation(s)
- Thomas P Keeley
- King's British Heart Foundation Centre of Research Excellence, School of Cardiovascular Medicine and Sciences, Faculty of Life Sciences and Medicine, King's College London , London , United Kingdom
| | - Giovanni E Mann
- King's British Heart Foundation Centre of Research Excellence, School of Cardiovascular Medicine and Sciences, Faculty of Life Sciences and Medicine, King's College London , London , United Kingdom
| |
Collapse
|
21
|
Olcina MM, Kim RK, Melemenidis S, Graves EE, Giaccia AJ. The tumour microenvironment links complement system dysregulation and hypoxic signalling. Br J Radiol 2018; 92:20180069. [PMID: 29544344 PMCID: PMC6435069 DOI: 10.1259/bjr.20180069] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
The complement system is an innate immune pathway typically thought of as part of the first line of defence against “non-self” species. In the context of cancer, complement has been described to have an active role in facilitating cancer-associated processes such as increased proliferation, angiogenesis and migration. Several cellular members of the tumour microenvironment express and/or produce complement proteins locally, including tumour cells. Dysregulation of the complement system has been reported in numerous tumours and increased expression of complement activation fragments in cancer patient specimens correlates with poor patient prognosis. Importantly, genetic or pharmacological targeting of complement has been shown to reduce tumour growth in several cancer preclinical models, suggesting that complement could be an attractive therapeutic target. Hypoxia (low oxygen) is frequently found in solid tumours and has a profound biological impact on cellular and non-cellular components of the tumour microenvironment. In this review, we focus on hypoxia since this is a prevailing feature of the tumour microenvironment that, like increased complement, is typically associated with poor prognosis. Furthermore, interesting links between hypoxia and complement have been recently proposed but never collectively reviewed. Here, we explore how hypoxia alters regulation of complement proteins in different cellular components of the tumour microenvironment, as well as the downstream biological consequences of this regulation.
Collapse
Affiliation(s)
- Monica M Olcina
- Department of Radiation Oncology, Stanford University, Stanford, CA, USA
| | - Ryan K Kim
- Department of Radiation Oncology, Stanford University, Stanford, CA, USA
| | | | - Edward E Graves
- Department of Radiation Oncology, Stanford University, Stanford, CA, USA
| | - Amato J Giaccia
- Department of Radiation Oncology, Stanford University, Stanford, CA, USA
| |
Collapse
|
22
|
Lee S, Bak H, Ahn SK. Liponeurofibroma: Clinicopathological features and histogenesis. J Dermatol 2018; 45:416-424. [PMID: 29388260 DOI: 10.1111/1346-8138.14238] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2017] [Accepted: 12/24/2017] [Indexed: 11/30/2022]
Abstract
A neurofibroma is a common cutaneous benign tumor of neural origin. Various histological variants have been reported. Recently, sporadic reports of fatty variants have been reported but their clinicopathological features have not been well studied. The purpose of this study was to examine liponeurofibroma, and to report the distinctive clinicopathological features and histogenesis in comparison with the classic form. A retrospective study was performed on 130 cases. Immunohistochemical staining was performed for S100, factor VIIIa, perilipin and vascular endothelial growth factor. Masson's trichrome stain was also used. Intratumoral adipocytes were examined with transmission electron microscopy. Thirty-two (24.6%) cases were classified as liponeurofibroma on microscopic examination. This variant was more common in patients with neurofibromatosis type 1, older age and female sex. The most prevalent location was the head and neck. Intratumoral fat deposits showed differences in morphology and size compared with subcutaneous fat on light microscopy. Neurofibromatosis type 1 had the highest odds of fatty change in liponeurofibroma. In sporadic cases, fatty change can be caused by senescence, chronic injury, or tissue hypoxia secondary to internal or external stimuli. Further investigation is needed to identify the pathomechanism of fatty change in various cutaneous neoplasms, including neurofibroma.
Collapse
Affiliation(s)
- Solam Lee
- Department of Dermatology, Yonsei University Wonju College of Medicine, Wonju, Korea
| | - Hana Bak
- Department of Dermatology, Yonsei University Wonju College of Medicine, Wonju, Korea
| | - Sung Ku Ahn
- Department of Dermatology, Yonsei University Wonju College of Medicine, Wonju, Korea
| |
Collapse
|
23
|
Choi SH, Park JY. Regulation of the hypoxic tumor environment in hepatocellular carcinoma using RNA interference. Cancer Cell Int 2017; 17:3. [PMID: 28053598 PMCID: PMC5209894 DOI: 10.1186/s12935-016-0374-6] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2016] [Accepted: 12/21/2016] [Indexed: 12/15/2022] Open
Abstract
Objectives Hypoxia is the condition where tumor cells have been deprived of oxygen and has been shown to have a role of tumor development in the hepatocellular carcinoma (HCC). Methods Using PubMed online database and Google scholar web site, the terms “angiogenesis”, “apoptosis”, “RNA interference” and/or “hepatocellular carcinoma (HCC)” were searched and analyzed. Results The hypoxia inducible factors (HIFs) are transcriptional regulators that affect a homeostatic response to oxidative stress and have been identified as a key transcription activator of angiogenesis, survival, and metabolism. Cytokines, such as IL-8, also controlled endothelia cells survival and angiogenesis. IL-8 was also overexpressed under hypoxia and induced tumor angiogenesis and growth. Conclusion Therefore, regulation of HIFs and IL-8 controlled the tumor microenvironment in terms of tumor angiogenesis and apoptosis. The review summarizes the results of regulation of the hypoxic tumor environment.
Collapse
Affiliation(s)
- Sung Hoon Choi
- Division of Bioconvergence Analysis, Drug and Disease Target Group, Korea Basic Science Institute, Daejeon, Korea
| | - Jun Yong Park
- Department of Internal Medicine, Institute of Gastroenterology, Yonsei University College of Medicine, Seoul, Korea
| |
Collapse
|
24
|
Sang X, Wang Z, Qin T, Li Y. Elevated concentrations of hypoxia-inducible factor-1α in patients with fracture and concomitant traumatic brain injury. Ann Clin Biochem 2016; 54:584-592. [PMID: 27687082 DOI: 10.1177/0004563216673087] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Background Compelling evidence indicate that traumatic brain injury is highly related to accelerated bone fracture repair, but the underlying mechanism still remains elusive. Fracture repair process relies greatly on the formation of new blood vessels in fracture site, and angiogenic factors have been confirmed to be essential for the initiation and maintenance of the fracture healing. Hypoxia-inducible factor-1α was demonstrated to be a critical regulator of angiogenic-osteogenic coupling during bone development and regeneration. The aim of the present study was to investigate the local and circulating concentrations of hypoxia-inducible factor-1α in patients with long-bone fractures and concomitant traumatic brain injury and to determine the potential role of hypoxia-inducible factor-1α in fracture healing. Methods Twenty-five patients with a long-bone fracture and concomitant traumatic brain injury (FT group) and 33 without a brain injury (Fr group) were enrolled in this study. Healthy subjects donated serum samples as control. Serum samples were collected over a period of six months, following a standardized time schedule. Hypoxia-inducible factor-1α concentrations were measured in fracture haematoma and serum of patients in both groups using enzyme-linked immunosorbent assay. Results Patients in FT group had a short time to union. Serum hypoxia-inducible factor-1α concentrations elevated in the early healing period and reached the maximum level during intramembranous bone formation phase in both groups. Thereafter, it decreased continuously and approached to the minimum levels until the end of the observation period. Serum hypoxia-inducible factor-1α concentrations in both groups were significantly higher compared with controls and hypoxia-inducible factor-1α concentrations in both serum and fracture haematoma were higher in FT group than that in Fr group. Fracture haematoma contained significantly higher hypoxia-inducible factor-1α concentrations compared with hypoxia-inducible factor-1α concentrations in serum. Serum hypoxia-inducible factor-1α concentrations had a positive correlation with hypoxia-inducible factor-1α concentrations in fracture haematoma in patients with fractures. Conclusions These findings suggest the local and systemic involvement of hypoxia-inducible factor-1α in fracture healing and the accelerated fracture repair in patients with traumatic brain injury might be associated with elevated hypoxia-inducible factor-1α concentrations in fracture haematoma and serum.
Collapse
Affiliation(s)
- Xiguang Sang
- Department of Emergency Surgery, Qilu Hospital of Shandong University, Jinan, P. R. China
| | - Zhiyong Wang
- Department of Emergency Surgery, Qilu Hospital of Shandong University, Jinan, P. R. China
| | - Tao Qin
- Department of Emergency Surgery, Qilu Hospital of Shandong University, Jinan, P. R. China
| | - Yonggang Li
- Department of Emergency Surgery, Qilu Hospital of Shandong University, Jinan, P. R. China
| |
Collapse
|
25
|
Butler LM, Hallström BM, Fagerberg L, Pontén F, Uhlén M, Renné T, Odeberg J. Analysis of Body-wide Unfractionated Tissue Data to Identify a Core Human Endothelial Transcriptome. Cell Syst 2016; 3:287-301.e3. [PMID: 27641958 DOI: 10.1016/j.cels.2016.08.001] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2015] [Revised: 05/23/2016] [Accepted: 08/03/2016] [Indexed: 12/11/2022]
Abstract
Endothelial cells line blood vessels and regulate hemostasis, inflammation, and blood pressure. Proteins critical for these specialized functions tend to be predominantly expressed in endothelial cells across vascular beds. Here, we present a systems approach to identify a panel of human endothelial-enriched genes using global, body-wide transcriptomics data from 124 tissue samples from 32 organs. We identified known and unknown endothelial-enriched gene transcripts and used antibody-based profiling to confirm expression across vascular beds. The majority of identified transcripts could be detected in cultured endothelial cells from various vascular beds, and we observed maintenance of relative expression in early passage cells. In summary, we describe a widely applicable method to determine cell-type-specific transcriptome profiles in a whole-organism context, based on differential abundance across tissues. We identify potential vascular drug targets or endothelial biomarkers and highlight candidates for functional studies to increase understanding of the endothelium in health and disease.
Collapse
Affiliation(s)
- Lynn Marie Butler
- Institute for Clinical Chemistry and Laboratory Medicine, University Medical Centre Hamburg-Eppendorf, 20246 Hamburg, Germany; Clinical Chemistry and Blood Coagulation, Department of Molecular Medicine and Surgery, Karolinska Institute, 171 76 Stockholm, Sweden.
| | - Björn Mikael Hallström
- Science for Life Laboratory, School of Biotechnology, Royal Institute of Technology (KTH), 171 21 Stockholm, Sweden
| | - Linn Fagerberg
- Science for Life Laboratory, School of Biotechnology, Royal Institute of Technology (KTH), 171 21 Stockholm, Sweden
| | - Fredrik Pontén
- Department of Immunology, Genetics and Pathology, Science for Life Laboratory, Uppsala University, 751 85 Uppsala, Sweden
| | - Mathias Uhlén
- Science for Life Laboratory, School of Biotechnology, Royal Institute of Technology (KTH), 171 21 Stockholm, Sweden
| | - Thomas Renné
- Institute for Clinical Chemistry and Laboratory Medicine, University Medical Centre Hamburg-Eppendorf, 20246 Hamburg, Germany; Clinical Chemistry and Blood Coagulation, Department of Molecular Medicine and Surgery, Karolinska Institute, 171 76 Stockholm, Sweden
| | - Jacob Odeberg
- Science for Life Laboratory, School of Biotechnology, Royal Institute of Technology (KTH), 171 21 Stockholm, Sweden; Coagulation Unit, Centre for Hematology, Karolinska University Hospital, 171 76 Stockholm, Sweden
| |
Collapse
|
26
|
Kim BR, Seo SH, Park MS, Lee SH, Kwon Y, Rho SB. sMEK1 inhibits endothelial cell proliferation by attenuating VEGFR-2-dependent-Akt/eNOS/HIF-1α signaling pathways. Oncotarget 2016; 6:31830-43. [PMID: 26378810 PMCID: PMC4741643 DOI: 10.18632/oncotarget.5570] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2015] [Accepted: 08/15/2015] [Indexed: 12/31/2022] Open
Abstract
The suppressor of MEK null (sMEK1) protein possesses pro-apoptotic activities. In the current study, we reveal that sMEK1 functions as a novel anti-angiogenic factor by suppressing vascular endothelial growth factor (VEGF)-induced cell proliferation, migration, and capillary-like tubular structure in vitro. In addition, sMEK1 inhibited the phosphorylation of the signaling components up- and downstream of Akt, including phospholipase Cγ1 (PLC-γ1), 3-phosphoinositide-dependent protein kinase 1 (PDK1), endothelial nitric oxide synthetase (eNOS), and hypoxia-inducible factor 1 (HIF-1α) during ovarian tumor progression via binding with vascular endothelial growth factor receptor 2 (VEGFR-2). Furthermore, sMEK1 decreased tumor vascularity and inhibited tumor growth in a xenograft human ovarian tumor model. These results supply convincing evidence that sMEK1 controls endothelial cell function and subsequent angiogenesis by suppressing VEGFR-2-mediated PI3K/Akt/eNOS signaling pathway. Taken together, our results clearly suggest that sMEK1 might be a novel anti-angiogenic and anti-tumor agent for use in ovarian tumor.
Collapse
Affiliation(s)
- Boh-Ram Kim
- Research Institute, National Cancer Center, Ilsan-ro, Ilsandong-gu, Goyang-si Gyeonggi-do, Republic of Korea.,College of Pharmacy, Graduate School of Pharmaceutical Sciences, Ewha Global Top 5 Program, Ewha Womans University, Seoul, Republic of Korea
| | - Seung Hee Seo
- Research Institute, National Cancer Center, Ilsan-ro, Ilsandong-gu, Goyang-si Gyeonggi-do, Republic of Korea
| | - Mi Sun Park
- Research Institute, National Cancer Center, Ilsan-ro, Ilsandong-gu, Goyang-si Gyeonggi-do, Republic of Korea
| | - Seung-Hoon Lee
- Department of Life Science, Yong In University, Samga-dong, Cheoin-gu, Yongin-si Gyeonggi-do, Republic of Korea
| | - Youngjoo Kwon
- College of Pharmacy, Graduate School of Pharmaceutical Sciences, Ewha Global Top 5 Program, Ewha Womans University, Seoul, Republic of Korea
| | - Seung Bae Rho
- Research Institute, National Cancer Center, Ilsan-ro, Ilsandong-gu, Goyang-si Gyeonggi-do, Republic of Korea
| |
Collapse
|
27
|
Moritz M, Pfeifer S, Balmayor ER, Mittermayr R, Wolbank S, Redl H, van Griensven M. VEGF released from a fibrin biomatrix increases VEGFR-2 expression and improves early outcome after ischaemia-reperfusion injury. J Tissue Eng Regen Med 2016; 11:2153-2163. [PMID: 26777435 DOI: 10.1002/term.2114] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2015] [Revised: 10/26/2015] [Accepted: 11/06/2015] [Indexed: 12/30/2022]
Abstract
Skeletal ischaemia-reperfusion (I-R) injury may influence patient outcome after severe vascular trauma or clamping of major vessels. The aim of this study was to observe whether locally applied vascular endothelial growth factor (VEGF) in fibrin could induce the expression of VEGF-receptor-2 (VEGFR-2) and improve the outcome after I-R injury. Transgenic mice expressing VEGFR-2 promoter-controlled luciferase were used for the assessment of VEGFR-2 expression. Ischaemia was induced for 2 h by a tension-controlled tourniquet to the hind limb, followed by 24 h of reperfusion. The animals were locally injected subcutaneously with fibrin sealant containing 20 or 200 ng VEGF; control animals received no treatment or fibrin sealant application. In vivo VEGFR-2 expression was quantified upon administration of luciferin at several observation times. For oedema and inflammation quantification, wet:dry ratio measurements and a myeloperoxidase assay of the muscle tissue were performed. Laser Doppler imaging showed that ischaemia was present and that the blood flow had returned to baseline levels after 24 h of reperfusion. VEGFR-2 expression levels in the fibrin + 200 ng VEGF were significantly higher than in all other groups. Granulocyte infiltration was reduced in both treatment groups, as well as reduced oedema formation. These results showed that VEGF released from fibrin had a positive effect on early I-R outcome in a mouse model, possibly via VEGFR-2. Copyright © 2016 John Wiley & Sons, Ltd.
Collapse
Affiliation(s)
- Martina Moritz
- Ludwig Boltzmann Institute for Experimental and Clinical Traumatology, AUVA Research Centre, Austrian Cluster for Tissue Regeneration, Vienna, Austria.,Department of Trauma Surgery, Campus Innenstadt, Ludwig-Maximilians University, Munich, Germany
| | - Sabine Pfeifer
- Ludwig Boltzmann Institute for Experimental and Clinical Traumatology, AUVA Research Centre, Austrian Cluster for Tissue Regeneration, Vienna, Austria
| | - Elizabeth R Balmayor
- Department of Experimental Trauma Surgery, Klinikum Rechts der Isar, Technical University Munich, Germany
| | - Rainer Mittermayr
- Ludwig Boltzmann Institute for Experimental and Clinical Traumatology, AUVA Research Centre, Austrian Cluster for Tissue Regeneration, Vienna, Austria
| | - Susanne Wolbank
- Ludwig Boltzmann Institute for Experimental and Clinical Traumatology, AUVA Research Centre, Austrian Cluster for Tissue Regeneration, Vienna, Austria
| | - Heinz Redl
- Ludwig Boltzmann Institute for Experimental and Clinical Traumatology, AUVA Research Centre, Austrian Cluster for Tissue Regeneration, Vienna, Austria
| | - Martijn van Griensven
- Ludwig Boltzmann Institute for Experimental and Clinical Traumatology, AUVA Research Centre, Austrian Cluster for Tissue Regeneration, Vienna, Austria.,Department of Experimental Trauma Surgery, Klinikum Rechts der Isar, Technical University Munich, Germany
| |
Collapse
|
28
|
Balaji S, Han N, Moles C, Shaaban AF, Bollyky PL, Crombleholme TM, Keswani SG. Angiopoietin-1 improves endothelial progenitor cell-dependent neovascularization in diabetic wounds. Surgery 2015; 158:846-56. [PMID: 26266763 DOI: 10.1016/j.surg.2015.06.034] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2015] [Revised: 06/22/2015] [Accepted: 06/27/2015] [Indexed: 02/07/2023]
Abstract
BACKGROUND The diabetic phenotype of wound healing is in part characterized by impaired neovascularization and deficient endothelial progenitor cell (EPC) recruitment. Angiopoietin-1 (Ang-1) is a potent mobilizer of EPCs from the bone marrow (BM). A suggested mechanism for EPC mobilization from the BM is mediated by matrix metalloproteinase 9 (MMP-9) and stem cell factor (SCF). Taken together, we hypothesized that overexpression of Ang-1 in diabetic wounds will recruit EPCs and improve neovascularization and wound healing. METHODS An endothelial lineage BM-labeled murine model of diabetes was developed to track BM-derived EPCs. FVBN mice were lethally irradiated and then reconstituted with BM from syngeneic Tie2/LacZ donor mice. Diabetes was induced with streptozotocin. Dorsal wounds in BM-transplanted mice were treated with Ad-Ang-1, Ad-GFP, or phosphate-buffered saline. At day 7 after injury, wounds were harvested and analyzed. A similar experiment was conducted in EPC mobilization deficient MMP-9 -/- mice to determine whether the effects of Ang-1 were EPC-dependent. RESULTS Overexpression of Ang-1 resulted in greatly improved re-epithelialization, neovascularization, and EPC recruitment in diabetic BM-transplanted wounds at day 7. Ang-1 treatment resulted in increased serum levels of proMMP-9 and SCF but had no effect on vascular endothelial growth factor levels. According to our FACS results, peripheral blood EPC (CD34(+)/Cd133(+)/Flk1(+)) counts at day 3 after wounding showed impaired EPC mobilization in MMP-9 -/- mice compared with those of wild-type controls. EPC mobilization was rescued by SCF administration, validating this model for EPC-mobilization-deficient mechanistic studies. In MMP-9 -/- mice, Ad-Ang-1 accelerated re-epithelialization in a similar manner, but had no effect on neovascularization. CONCLUSION Our results show that Ang-1 administration results in improved neovascularization which is dependent on EPC recruitment and has direct effects on wound re-epithelialization. These data may represent a novel strategy to correct the phenotype of impaired diabetic neovascularization and may improve diabetic wound healing.
Collapse
Affiliation(s)
- Swathi Balaji
- Laboratory for Regenerative Wound Healing, Division of Pediatric, General, Thoracic and Fetal Surgery, Cincinnati Children's Hospital Medical Center, Cincinnati, OH
| | - Nate Han
- Laboratory for Regenerative Wound Healing, Division of Pediatric, General, Thoracic and Fetal Surgery, Cincinnati Children's Hospital Medical Center, Cincinnati, OH
| | - Chad Moles
- Laboratory for Regenerative Wound Healing, Division of Pediatric, General, Thoracic and Fetal Surgery, Cincinnati Children's Hospital Medical Center, Cincinnati, OH
| | - Aimen F Shaaban
- Laboratory for Regenerative Wound Healing, Division of Pediatric, General, Thoracic and Fetal Surgery, Cincinnati Children's Hospital Medical Center, Cincinnati, OH
| | - Paul L Bollyky
- Division of Infectious Diseases, Department of Medicine, Stanford University School of Medicine, Stanford, CA
| | - Timothy M Crombleholme
- Laboratory for Regenerative Wound Healing, Division of Pediatric, General, Thoracic and Fetal Surgery, Cincinnati Children's Hospital Medical Center, Cincinnati, OH; Center for Children's Surgery, Children's Hospital Colorado and the University of Colorado School of Medicine, Aurora, CO
| | - Sundeep G Keswani
- Laboratory for Regenerative Wound Healing, Division of Pediatric, General, Thoracic and Fetal Surgery, Cincinnati Children's Hospital Medical Center, Cincinnati, OH.
| |
Collapse
|
29
|
Kim DH, Sung B, Kang YJ, Hwang SY, Kim MJ, Yoon JH, Im E, Kim ND. Sulforaphane inhibits hypoxia-induced HIF-1α and VEGF expression and migration of human colon cancer cells. Int J Oncol 2015; 47:2226-32. [PMID: 26498863 DOI: 10.3892/ijo.2015.3200] [Citation(s) in RCA: 66] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2015] [Accepted: 09/22/2015] [Indexed: 12/13/2022] Open
Abstract
The effects of sulforaphane (a natural product commonly found in broccoli) was investigated on hypoxia inducible factor-1α (HIF-1α) expression in HCT116 human colon cancer cells and AGS human gastric cancer cells. We found that hypoxia-induced HIF-1α protein expression in HCT116 and AGS cells, while treatment with sulforaphane markedly and concentration-dependently inhibited HIF-1α expression in both cell lines. Treatment with sulforaphane inhibited hypoxia-induced vascular endothelial growth factor (VEGF) expression in HCT116 cells. Treatment with sulforaphane modulated the effect of hypoxia on HIF-1α stability. However, degradation of HIF-1α by sulforaphane was not mediated through the 26S proteasome pathway. We also found that the inhibition of HIF-1α by sulforaphane was not mediated through AKT and extracellular signal-regulated kinase phosphorylation under hypoxic conditions. Finally, hypoxia-induced HCT116 cell migration was inhibited by sulforaphane. These data suggest that sulforaphane may inhibit human colon cancer progression and cancer cell angiogenesis by inhibiting HIF-1α and VEGF expression. Taken together, these results indicate that sulforaphane is a new and potent chemopreventive drug candidate for treating patients with human colon cancer.
Collapse
Affiliation(s)
- Dong Hwan Kim
- Department of Pharmacy, Molecular Inflammation Research Center for Aging Intervention, Pusan National University, Busan 46241, Republic of Korea
| | - Bokyung Sung
- Department of Pharmacy, Molecular Inflammation Research Center for Aging Intervention, Pusan National University, Busan 46241, Republic of Korea
| | - Yong Jung Kang
- Department of Pharmacy, Molecular Inflammation Research Center for Aging Intervention, Pusan National University, Busan 46241, Republic of Korea
| | - Seong Yeon Hwang
- Department of Pharmacy, Molecular Inflammation Research Center for Aging Intervention, Pusan National University, Busan 46241, Republic of Korea
| | - Min Jeong Kim
- Department of Pharmacy, Molecular Inflammation Research Center for Aging Intervention, Pusan National University, Busan 46241, Republic of Korea
| | - Jeong-Hyun Yoon
- Department of Pharmacy, Molecular Inflammation Research Center for Aging Intervention, Pusan National University, Busan 46241, Republic of Korea
| | - Eunok Im
- Department of Pharmacy, Molecular Inflammation Research Center for Aging Intervention, Pusan National University, Busan 46241, Republic of Korea
| | - Nam Deuk Kim
- Department of Pharmacy, Molecular Inflammation Research Center for Aging Intervention, Pusan National University, Busan 46241, Republic of Korea
| |
Collapse
|
30
|
Singh S, Veeraswamy G, Bhattarai D, Goo JI, Lee K, Choi Y. Recent Advances in the Development of Pharmacologically Active Compounds that Contain a Benzoxazole Scaffold. ASIAN J ORG CHEM 2015. [DOI: 10.1002/ajoc.201500235] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Sarbjit Singh
- College of Pharmacy; Dongguk University-Seoul; Republic of Korea
| | - Gajulapati Veeraswamy
- College of Life Science and Biotechnology; Korea University-Seoul; Republic of Korea
| | - Deepak Bhattarai
- College of Pharmacy; Dongguk University-Seoul; Republic of Korea
| | - Ja-Il Goo
- College of Life Science and Biotechnology; Korea University-Seoul; Republic of Korea
| | - Kyeong Lee
- College of Pharmacy; Dongguk University-Seoul; Republic of Korea
| | - Yongseok Choi
- College of Life Science and Biotechnology; Korea University-Seoul; Republic of Korea
| |
Collapse
|
31
|
Perry NJS, Ma D. Inhalational Anesthetic Agents and Their Effects on Cancer Cell Biology. CURRENT ANESTHESIOLOGY REPORTS 2015. [DOI: 10.1007/s40140-015-0119-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
|
32
|
Nakamura H, Tazaki L, Kanoh D, Sato S. Diaryl-substituted carboranes as inhibitors of hypoxia inducible factor-1 transcriptional activity. PURE APPL CHEM 2015. [DOI: 10.1515/pac-2014-0911] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
AbstractDiaryl-substituted carboranes, as a new class of HIF-1α inhibitors, were synthesized from the corresponding diaryl-substituted alkynes by decaborane coupling. The microwave-irradiated conditions with a combination of N,N-dimethylaniline and chlorobenzene were effective to obtain the diaryl-substituted carboranes in good to high yields. Among the compounds synthesized, compounds 1a and 1d showed significant inhibition of HIF-1 mediated transcriptional activity under hypoxia. Both compounds similarly suppressed hypoxia-induced HIF-1α accumulation in a concentration-dependent manner without affecting HIF-1α mRNA expression.
Collapse
Affiliation(s)
| | - Lisa Tazaki
- 2Faculty of Science, Department of Chemistry, Gakushuin University, Mejiro, Tokyo 171-8588, Japan
| | - Daisuke Kanoh
- 2Faculty of Science, Department of Chemistry, Gakushuin University, Mejiro, Tokyo 171-8588, Japan
| | - Shinichi Sato
- 1Chemical Resources Laboratory, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama, 226-8503, Japan
| |
Collapse
|
33
|
Filippi I, Morena E, Aldinucci C, Carraro F, Sozzani S, Naldini A. Short-term hypoxia enhances the migratory capability of dendritic cell through HIF-1α and PI3K/Akt pathway. J Cell Physiol 2014; 229:2067-76. [PMID: 24818793 DOI: 10.1002/jcp.24666] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2014] [Revised: 05/05/2014] [Accepted: 05/06/2014] [Indexed: 01/01/2023]
Abstract
Hypoxia represents an inadequate oxygen supply to tissues, which can modulate cell functions, primarily through the hypoxia-inducible transcription factor HIF-1α. Dendritic cells (DC) are professional antigen-presenting cells and their migration maybe affected by hypoxia, since the local microenvironment in lymphoid organs, as well as in inflamed and tumor tissues, is characterized by low oxygen tensions. In this study we observed an enhanced migratory capability of human monocyte-derived DC, using in vitro migration assays performed under hypoxic conditions. Such enhancement was independent on either the chemoattractants involved or the maturation level of DC. However, HIF-1α appeared to be crucial for the migration only of immature DC and not for mature DC under hypoxia, as indicated by HIF-1α siRNA approaches. Furthermore, we observed that while Akt phosphorylation was enhanced in both immature and mature DC exposed to hypoxia, other signaling pathways, such as p38 and p42/p44 MAPK, were differently affected during hypoxic treatment. More interestingly, aspecific and specific inhibition of PI3K/Akt indicated that such pathway was relevant for the migration of both immature and matured DC under hypoxia, even when DC were transfected with HIF-1α siRNA. Our results indicate that, besides HIF-1α, several other pathways, including PI3K/Akt, may be involved in the response to hypoxia of immature and, more specifically, of mature DC to sustain their trafficking and functions within hypoxic microenvironments.
Collapse
Affiliation(s)
- Irene Filippi
- Unit of Cellular and Molecular Physiology, Department of Molecular and Developmental Medicine, University of Siena, Siena, Italy
| | | | | | | | | | | |
Collapse
|
34
|
Zhao Y, Zhu CD, Yan B, Zhao JL, Wang ZH. miRNA-directed regulation of VEGF in tilapia under hypoxia condition. Biochem Biophys Res Commun 2014; 454:183-8. [PMID: 25450378 DOI: 10.1016/j.bbrc.2014.10.068] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2014] [Accepted: 10/14/2014] [Indexed: 11/28/2022]
Abstract
The Nile tilapia represents an excellent model for hypoxia tolerance. Vascular endothelial growth factor (VEGF) plays a key role in physiological blood vessel formation and pathological angiogenesis under hypoxia conditions. Tight regulation of VEGF level is necessary for hypoxia adaptation in tilapia. MicroRNAs (miRNAs) function as important regulators of gene expression at the post-transcriptional level, which are usually involved in stress responses. We reasoned that VEGF level could be regulated by miRNAs. Through bioinformatics analysis, we identified a putative miR-204 binding site in the VEGF mRNA. We found that hypoxia leads to a marked up-regulation in VEGF level, but a decrease in miR-204 level. miR-204 directly regulates VEGF expression by targeting its 3'-UTR, and inhibition of miR-204 substantially increases VEGF level in vivo. Moreover, we found that miR-204 loss of function could affect blood O2-carrying capacity, anaerobic metabolism, and antioxidant enzyme activity. Taken together, miR-204 is an endogenous regulator of VEGF expression, which participates in a regulatory circuit that allows rapid gene program transitions upon hypoxia stress.
Collapse
Affiliation(s)
- Yan Zhao
- College of Fisheries and Life Science, Shanghai Ocean University, Shanghai 201306, China
| | - Chang-Dong Zhu
- College of Fisheries and Life Science, Shanghai Ocean University, Shanghai 201306, China
| | - Biao Yan
- College of Fisheries and Life Science, Shanghai Ocean University, Shanghai 201306, China
| | - Jin-Liang Zhao
- College of Fisheries and Life Science, Shanghai Ocean University, Shanghai 201306, China
| | - Zhen-Hua Wang
- College of Information Technology, Shanghai Ocean University, Shanghai 201306, China.
| |
Collapse
|
35
|
Liegl R, Koenig S, Siedlecki J, Haritoglou C, Kampik A, Kernt M. Temsirolimus inhibits proliferation and migration in retinal pigment epithelial and endothelial cells via mTOR inhibition and decreases VEGF and PDGF expression. PLoS One 2014; 9:e88203. [PMID: 24586308 PMCID: PMC3935828 DOI: 10.1371/journal.pone.0088203] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2013] [Accepted: 01/10/2014] [Indexed: 12/22/2022] Open
Abstract
Due to their high prevalence, retinal vascular diseases including age related macular degeneration (AMD), retinal vein occlusions (RVO), diabetic retinopathy (DR) and diabetic macular edema have been major therapeutic targets over the last years. The pathogenesis of these diseases is complex and yet not fully understood. However, increased proliferation, migration and angiogenesis are characteristic cellular features in almost every retinal vascular disease. The introduction of vascular endothelial growth factor (VEGF) binding intravitreal treatment strategies has led to great advances in the therapy of these diseases. While the predominant part of affected patients benefits from the specific binding of VEGF by administering an anti-VEGF antibody into the vitreous cavity, a small number of non-responders exist and alternative or additional therapeutic strategies should therefore be evaluated. The mammalian target of rapamycin (mTOR) is a central signaling pathway that eventually triggers up-regulation of cellular proliferation, migration and survival and has been identified to play a key role in angiogenesis. In the present study we were able to show that both retinal pigment epithelial (RPE) cells as wells as human umbilical vein endothelial cells (HUVEC) are inhibited in proliferating and migrating after treatment with temsirolimus in non-toxic concentrations. Previous studies suggest that the production of VEGF, platelet derived growth factor (PDGF) and other important cytokines is not only triggered by hypoxia but also by mTOR itself. Our results indicate that temsirolimus decreases VEGF and PDGF expression on RNA and protein levels significantly. We therefore believe that the mTOR inhibitor temsirolimus might be a promising drug in the future and it seems worthwhile to evaluate complementary therapeutic effects with anti-VEGF drugs for patients not profiting from mono anti-VEGF therapy alone.
Collapse
Affiliation(s)
- Raffael Liegl
- Department of Ophthalmology, Ludwig-Maximilians-University, Munich, Germany
| | - Susanna Koenig
- Department of Ophthalmology, Ludwig-Maximilians-University, Munich, Germany
| | - Jakob Siedlecki
- Department of Ophthalmology, Ludwig-Maximilians-University, Munich, Germany
| | | | - Anselm Kampik
- Department of Ophthalmology, Ludwig-Maximilians-University, Munich, Germany
| | - Marcus Kernt
- Department of Ophthalmology, Ludwig-Maximilians-University, Munich, Germany
| |
Collapse
|
36
|
Nakamura H, Yasui Y, Ban HS. Synthesis and biological evaluation of ortho-carborane containing benzoxazole as an inhibitor of hypoxia inducible factor (HIF)-1 transcriptional activity. J Organomet Chem 2013. [DOI: 10.1016/j.jorganchem.2013.04.007] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
|
37
|
Hoffmann BR, Wagner JR, Prisco AR, Janiak A, Greene AS. Vascular endothelial growth factor-A signaling in bone marrow-derived endothelial progenitor cells exposed to hypoxic stress. Physiol Genomics 2013; 45:1021-34. [PMID: 24022223 PMCID: PMC3841787 DOI: 10.1152/physiolgenomics.00070.2013] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2013] [Accepted: 09/09/2013] [Indexed: 01/13/2023] Open
Abstract
Bone marrow-derived endothelial progenitor cells (BM-EPCs) are stimulated by vascular endothelial growth factor-A (VEGF-A) and other potent proangiogenic factors. During angiogenesis, an increase in VEGF-A expression stimulates BM-EPCs to enhance endothelial tube formation and contribute to an increase in microvessel density. Hypoxia is known to produce an enhanced angiogenic response and heightened levels of VEGF-A have been seen in oxygen deprived epithelial and endothelial cells, yet the pathways for VEGF-A signaling in BM-EPCs have not been described. This study explores the influence of hypoxia on VEGF-A signaling in rat BM-EPCs utilizing a novel proteomic strategy to directly identify interacting downstream components of the combined VEGF receptor(s) signaling pathways, gene expression analysis, and functional phenotyping. VEGF-A signaling network analysis following liquid chromatographic separation and tandem mass spectrometry revealed proteins related to inositol/calcium signaling, nitric oxide signaling, cell survival, cell migration, and inflammatory responses. Alterations in BM-EPC expression of common angiogenic genes and tube formation in response to VEGF-A during hypoxia were measured and combined with the proteomic analysis to enhance and support the signaling pathways detected. BM-EPC tube formation assays in response to VEGF-A exhibited little tube formation; however, a cell projection/migratory phenotype supported the signaling data. Additionally, a novel assay measuring BM-EPC incorporation into preformed endothelial cell tubes indicated a significant increase of incorporated BM-EPCs after pretreatment with VEGF-A during hypoxia. This study verifies known VEGF-A pathway components and reveals several unidentified mechanisms of VEGF-A signaling in BM-EPCs during hypoxia that may be important for migration to sites of vascular regeneration.
Collapse
Affiliation(s)
- Brian R Hoffmann
- Biotechnology and Bioengineering Center, Medical College of Wisconsin, Milwaukee, Wisconsin; and
| | | | | | | | | |
Collapse
|
38
|
Cruz IN, Barry CS, Kramer HB, Chuang CC, Lloyd S, van der Spoel AC, Platt FM, Yang M, Davis BG. Glycomimetic affinity-enrichment proteomics identifies partners for a clinically-utilized iminosugar. Chem Sci 2013; 4:3442-3446. [PMID: 31031905 PMCID: PMC6485602 DOI: 10.1039/c3sc50826a] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Widescale evaluation of interacting partners for carbohydrates is an underexploited area. Probing of the 'glyco-interactome' has particular relevance given the lack of direct genetic control of glycoconjugate biosynthesis. Here we design, create and utilize a natural product-derived glycomimetic iminosugar probe in a Glycomimetic Affinity-enrichment Proteomics (glyco-AeP) strategy to elucidate key interactions directly from mammalian tissue. The binding partners discovered here and the associated genomic analysis implicate a subset of chaperone and junctional proteins as important in male fertility. Such repurposing of existing therapeutics thus creates direct routes to probing in vivo function. The success of this strategy suggests a general approach to discovering 'carbohydrate-active' partners in biology.
Collapse
Affiliation(s)
- Isa N. Cruz
- Department of Pharmaceutical & Biological Chemistry, UCL School of Pharmacy, University College London, 29/39 Brunswick Square, London, WC1N 1AX, UK
| | - Conor S. Barry
- Department of Chemistry, Chemistry Research Laboratory, Oxford University, Mansfield Road, Oxford, OX1 3TA, UK
| | - Holger B. Kramer
- Department of Physiology, Anatomy and Genetics, University of Oxford, South Parks Road, Oxford, OX1 3PT, UK
| | - C. Celeste Chuang
- Department of Pharmacology, University of Oxford, Mansfield Road, Oxford, OX1 3QT, UK
| | - Sarah Lloyd
- MRC Prion Unit, UCL Institute of Neurology, Queen Square, London WC1N 3BG, UK
| | | | - Frances M. Platt
- Department of Pharmacology, University of Oxford, Mansfield Road, Oxford, OX1 3QT, UK
| | - Min Yang
- Department of Pharmaceutical & Biological Chemistry, UCL School of Pharmacy, University College London, 29/39 Brunswick Square, London, WC1N 1AX, UK
| | - Benjamin G. Davis
- Department of Chemistry, Chemistry Research Laboratory, Oxford University, Mansfield Road, Oxford, OX1 3TA, UK
| |
Collapse
|
39
|
Sáinz-Jaspeado M, Huertas-Martinez J, Lagares-Tena L, Martin Liberal J, Mateo-Lozano S, de Alava E, de Torres C, Mora J, del Muro XG, Tirado OM. EphA2-induced angiogenesis in ewing sarcoma cells works through bFGF production and is dependent on caveolin-1. PLoS One 2013; 8:e71449. [PMID: 23951165 PMCID: PMC3741133 DOI: 10.1371/journal.pone.0071449] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2012] [Accepted: 07/03/2013] [Indexed: 12/20/2022] Open
Abstract
Angiogenesis is the result of the combined activity of the tumor microenvironment and signaling molecules. The angiogenic switch is represented as an imbalance between pro- and anti-angiogenic factors and is a rate-limiting step in the development of tumors. Eph receptor tyrosine kinases and their membrane-anchored ligands, known as ephrins, constitute the largest receptor tyrosine kinase (RTK) subfamily and are considered a major family of pro-angiogenic RTKs. Ewing sarcoma (EWS) is a highly aggressive bone and soft tissue tumor affecting children and young adults. As other solid tumors, EWS are reliant on a functional vascular network for the delivery of nutrients and oxygen and for the removal of waste. Based on the biological roles of EphA2 in promoting angiogenesis, we explored the functional role of this receptor and its relationship with caveolin-1 (CAV1) in EWS angiogenesis. We demonstrated that lack of CAV1 results in a significant reduction in micro vascular density (MVD) on 3 different in vivo models. In vitro, this phenomenon correlated with inactivation of EphA2 receptor, lack of AKT response and downregulation of bFGF. We also demonstrated that secreted bFGF from EWS cells acted as chemoattractant for endothelial cells. Furthermore, interaction between EphA2 and CAV1 was necessary for the right localization and signaling of the receptor to produce bFGF through AKT and promote migration of endothelial cells. Finally, introduction of a dominant-negative form of EphA2 into EWS cells mostly reproduced the effects occurred by CAV1 silencing, strongly suggesting that the axis EphA2-CAV1 participates in the promotion of endothelial cell migration toward the tumors favoring EWS angiogenesis.
Collapse
MESH Headings
- Animals
- Bone Neoplasms/genetics
- Bone Neoplasms/metabolism
- Bone Neoplasms/pathology
- Caveolin 1/genetics
- Caveolin 1/metabolism
- Cell Line, Tumor
- Cell Movement/genetics
- Disease Models, Animal
- Endothelial Cells/metabolism
- Female
- Fibroblast Growth Factor 2/biosynthesis
- Fibroblast Growth Factor 2/genetics
- Gene Silencing
- Heterografts
- Humans
- Mice
- Mice, Knockout
- Neovascularization, Pathologic/genetics
- Neovascularization, Pathologic/metabolism
- Protein Binding
- Protein Transport
- Proto-Oncogene Proteins c-akt/metabolism
- Receptor, EphA2/genetics
- Receptor, EphA2/metabolism
- Sarcoma, Ewing/genetics
- Sarcoma, Ewing/metabolism
- Sarcoma, Ewing/pathology
- Signal Transduction
- Transcription, Genetic
- Tumor Burden/genetics
Collapse
Affiliation(s)
- Miguel Sáinz-Jaspeado
- Sarcoma Research Group, Laboratori d’Oncología Molecular, Institut d’Investigació Biomèdica de Bellvitge (IDIBELL), L’Hospitalet de Llobregat, Barcelona, Spain
| | - Juan Huertas-Martinez
- Sarcoma Research Group, Laboratori d’Oncología Molecular, Institut d’Investigació Biomèdica de Bellvitge (IDIBELL), L’Hospitalet de Llobregat, Barcelona, Spain
| | - Laura Lagares-Tena
- Sarcoma Research Group, Laboratori d’Oncología Molecular, Institut d’Investigació Biomèdica de Bellvitge (IDIBELL), L’Hospitalet de Llobregat, Barcelona, Spain
| | - Juan Martin Liberal
- Sarcoma Research Group, Laboratori d’Oncología Molecular, Institut d’Investigació Biomèdica de Bellvitge (IDIBELL), L’Hospitalet de Llobregat, Barcelona, Spain
| | - Silvia Mateo-Lozano
- Nanomedicine Research Program, Molecular Biology and Biochemistry Research Center, CIBBIM-Nanomedicine, Vall d'Hebron Hospital Research Institute, Barcelona, Spain
| | - Enrique de Alava
- Centro de Investigación del Cáncer-IBMCC (University of Salamanca-CSIC), and University Hospital of Salamanca, Salamanca, Spain
| | - Carmen de Torres
- Developmental Tumor Biology Laboratory, Hospital Sant Joan de Deu, Barcelona, Spain
| | - Jaume Mora
- Developmental Tumor Biology Laboratory, Hospital Sant Joan de Deu, Barcelona, Spain
| | - Xavier Garcia del Muro
- Sarcoma Research Group, Laboratori d’Oncología Molecular, Institut d’Investigació Biomèdica de Bellvitge (IDIBELL), L’Hospitalet de Llobregat, Barcelona, Spain
| | - Oscar M. Tirado
- Sarcoma Research Group, Laboratori d’Oncología Molecular, Institut d’Investigació Biomèdica de Bellvitge (IDIBELL), L’Hospitalet de Llobregat, Barcelona, Spain
- * E-mail:
| |
Collapse
|
40
|
Secomb TW, Alberding JP, Hsu R, Dewhirst MW, Pries AR. Angiogenesis: an adaptive dynamic biological patterning problem. PLoS Comput Biol 2013; 9:e1002983. [PMID: 23555218 PMCID: PMC3605064 DOI: 10.1371/journal.pcbi.1002983] [Citation(s) in RCA: 103] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2012] [Accepted: 01/28/2013] [Indexed: 12/04/2022] Open
Abstract
Formation of functionally adequate vascular networks by angiogenesis presents a problem in biological patterning. Generated without predetermined spatial patterns, networks must develop hierarchical tree-like structures for efficient convective transport over large distances, combined with dense space-filling meshes for short diffusion distances to every point in the tissue. Moreover, networks must be capable of restructuring in response to changing functional demands without interruption of blood flow. Here, theoretical simulations based on experimental data are used to demonstrate that this patterning problem can be solved through over-abundant stochastic generation of vessels in response to a growth factor generated in hypoxic tissue regions, in parallel with refinement by structural adaptation and pruning. Essential biological mechanisms for generation of adequate and efficient vascular patterns are identified and impairments in vascular properties resulting from defects in these mechanisms are predicted. The results provide a framework for understanding vascular network formation in normal or pathological conditions and for predicting effects of therapies targeting angiogenesis. The blood vessels provide an efficient system for transport of substances to all parts of the body. They are capable of growing or regressing during development, in response to changing functional needs, and in disease states. This is achieved by structural adaptation, i.e. changes in the diameters and other characteristics of existing vessels, and by angiogenesis, i.e. growth of new blood vessels. Here, we address the question: How do the processes of structural adaptation and angiogenesis lead to the formation of organized vessel networks that can supply the changing needs of the tissue? We carried out theoretical simulations of network growth and adaptation, including vessel blood flows, oxygen transport to tissue, and the generation of a growth factor in low-oxygen regions, which stimulates angiogenesis by sprouting from existing vessels. We showed that the processes of over-abundant random angiogenesis together with structural adaptation including pruning of redundant vessels can generate adequate and efficient vessel networks that are capable of continuously adapting to changing tissue needs. Our work provides insight into the biological mechanisms that are essential for formation and maintenance of functional vessel networks, and may lead to new strategies for controlling blood vessel formation in diseases.
Collapse
Affiliation(s)
- Timothy W Secomb
- Department of Physiology and Arizona Research Laboratories, University of Arizona, Tucson, Arizona, United States of America.
| | | | | | | | | |
Collapse
|
41
|
Development of hypoxia-inducible factor (HIF)-1α inhibitors: Effect of ortho-carborane substituents on HIF transcriptional activity under hypoxia. Bioorg Med Chem Lett 2013; 23:806-10. [DOI: 10.1016/j.bmcl.2012.11.081] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2012] [Revised: 11/19/2012] [Accepted: 11/20/2012] [Indexed: 02/08/2023]
|
42
|
Inhibition of aquaporin-1 dependent angiogenesis impairs tumour growth in a mouse model of melanoma. J Mol Med (Berl) 2012. [DOI: 10.1007/s00109-012-0977-x] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
|
43
|
Chen Y, Gou X, Ke X, Cui H, Chen Z. Human tumor cells induce angiogenesis through positive feedback between CD147 and insulin-like growth factor-I. PLoS One 2012; 7:e40965. [PMID: 22844419 PMCID: PMC3402467 DOI: 10.1371/journal.pone.0040965] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2011] [Accepted: 06/19/2012] [Indexed: 12/20/2022] Open
Abstract
Tumor angiogenesis is a complex process based upon a sequence of interactions between tumor cells and endothelial cells. Previous studies have shown that CD147 was correlated with tumor angiogenesis through increasing tumor cell secretion of vascular endothelial growth factor (VEGF) and matrix metalloproteinases (MMPs). In this study, we made a three-dimensional (3D) tumor angiogenesis model using a co-culture system of human hepatocellular carcinoma cells SMMC-7721 and humanumbilical vein endothelial cells (HUVECs) in vitro. We found that CD147-expressing cancer cells could promote HUVECs to form net-like structures resembling the neo-vasculature, whereas the ability of proliferation, migration and tube formation of HUVECs was significantly decreased in tumor conditioned medium (TCM) of SMMC-7721 cells transfected with specific CD147-siRNA. Furthermore, by assaying the change of pro-angiogenic factors in TCM, we found that the inhibition of CD147 expression led to significant decrease of VEGF and insulin-like growth factor-I (IGF-I) secretion. Interestingly, we also found that IGF-I up-regulated the expression of CD147 in both tumor cells and HUVECs. These findings suggest that there is a positive feedback between CD147 and IGF-I at the tumor-endothelial interface and CD147 initiates the formation of an angiogenesis niche.
Collapse
Affiliation(s)
- Yanke Chen
- College of Medicine, Xi’an Jiaotong University, Xi’an, China
- Department of Cell Biology & Cell Engineering Research Center & State Key Laboratory of Cancer Biology, Fourth Military Medical University, Xi’an, China
- * E-mail: (ZC); (YC)
| | - Xingchun Gou
- Laboratory of Cell Biology & Translational Medicine, Xi’an Medical University, Xi’an, China
| | - Xia Ke
- Department of Cell Biology & Cell Engineering Research Center & State Key Laboratory of Cancer Biology, Fourth Military Medical University, Xi’an, China
| | - Hongyong Cui
- Department of Cell Biology & Cell Engineering Research Center & State Key Laboratory of Cancer Biology, Fourth Military Medical University, Xi’an, China
| | - Zhinan Chen
- Department of Cell Biology & Cell Engineering Research Center & State Key Laboratory of Cancer Biology, Fourth Military Medical University, Xi’an, China
- * E-mail: (ZC); (YC)
| |
Collapse
|
44
|
Co-expression of VEGF and CA9 in ovarian high-grade serous carcinoma and relationship to survival. Virchows Arch 2012; 461:33-9. [DOI: 10.1007/s00428-012-1252-9] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2012] [Revised: 05/04/2012] [Accepted: 05/11/2012] [Indexed: 12/12/2022]
|
45
|
Ray A, Rajian JR, Lee YEK, Wang X, Kopelman R. Lifetime-based photoacoustic oxygen sensing in vivo. JOURNAL OF BIOMEDICAL OPTICS 2012; 17:057004. [PMID: 22612143 PMCID: PMC3381016 DOI: 10.1117/1.jbo.17.5.057004] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/04/2012] [Revised: 03/16/2012] [Accepted: 03/29/2012] [Indexed: 05/18/2023]
Abstract
The determination of oxygen levels in blood and other tissues in vivo is critical for ensuring proper body functioning, for monitoring the status of many diseases, such as cancer, and for predicting the efficacy of therapy. Here we demonstrate, for the first time, a lifetime-based photoacoustic technique for the measurement of oxygen in vivo, using an oxygen sensitive dye, enabling real time quantification of blood oxygenation. The results from the main artery in the rat tail indicated that the lifetime of the dye, quantified by the photoacoustic technique, showed a linear relationship with the blood oxygenation levels in the targeted artery.
Collapse
Affiliation(s)
- Aniruddha Ray
- University of Michigan, Biophysics, Ann Arbor, Michigan 48109
| | | | - Yong-Eun Koo Lee
- University of Michigan, Department of Chemistry, Ann Arbor, Michigan 48109
| | - Xueding Wang
- University of Michigan, Department of Radiology, Ann Arbor, Michigan 48109
- Address all correspondence to: Xueding Wang, University of Michigan, Department of Radiology, Ann Arbor, Michigan 48109. E-mail: ; Raoul Kopelman, University of Michigan, Biophysics, Ann Arbor, Michigan 48109. Tel: +1 734 764 7541; Fax: +1 734 936 2778; E-mail:
| | - Raoul Kopelman
- University of Michigan, Biophysics, Ann Arbor, Michigan 48109
- University of Michigan, Department of Chemistry, Ann Arbor, Michigan 48109
- Address all correspondence to: Xueding Wang, University of Michigan, Department of Radiology, Ann Arbor, Michigan 48109. E-mail: ; Raoul Kopelman, University of Michigan, Biophysics, Ann Arbor, Michigan 48109. Tel: +1 734 764 7541; Fax: +1 734 936 2778; E-mail:
| |
Collapse
|
46
|
Zhou H, Binmadi NO, Yang YH, Proia P, Basile JR. Semaphorin 4D cooperates with VEGF to promote angiogenesis and tumor progression. Angiogenesis 2012; 15:391-407. [PMID: 22476930 DOI: 10.1007/s10456-012-9268-y] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2011] [Accepted: 03/20/2012] [Indexed: 02/08/2023]
Abstract
The semaphorins and plexins comprise a family of cysteine-rich proteins implicated in control of nerve growth and development and regulation of the immune response. Our group and others have found that Semaphorin 4D (SEMA4D) and its receptor, Plexin-B1, play an important role in tumor-induced angiogenesis, with some neoplasms producing SEMA4D in a manner analogous to vascular endothelial growth factor (VEGF) in order to attract Plexin-B1-expressing endothelial cells into the tumor for the purpose of promoting growth and vascularity. While anti-VEGF strategies have been the focus of most angiogenesis inhibition research, such treatment can lead to upregulation of pro-angiogenic factors that can compensate for the loss of VEGF, eventually leading to failure of therapy. Here, we demonstrate that SEMA4D cooperates with VEGF to promote angiogenesis in malignancies and can perform the same function in a setting of VEGF blockade. We also show the potential value of inhibiting SEMA4D/Plexin-B1 signaling as a complementary mechanism to anti-VEGF treatment, particularly in VEGF inhibitor-resistant tumors, suggesting that this may represent a novel treatment for some cancers.
Collapse
Affiliation(s)
- Hua Zhou
- Department of Oncology and Diagnostic Sciences, University of Maryland Dental School, 650 West Baltimore Street, 7-North, Baltimore, MD 21201, USA
| | | | | | | | | |
Collapse
|
47
|
Park HY, Hahm CR, Jeon K, Koh WJ, Suh GY, Chung MP, Kim H, Kwon OJ, Um SW. Serum vascular endothelial growth factor and angiopoietin-2 are associated with the severity of systemic inflammation rather than the presence of hemoptysis in patients with inflammatory lung disease. Yonsei Med J 2012; 53:369-76. [PMID: 22318826 PMCID: PMC3282965 DOI: 10.3349/ymj.2012.53.2.369] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/04/2022] Open
Abstract
PURPOSE Vascular endothelial growth factor (VEGF) and angiopoietin-2 (Ang-2) are major mediators of angiogenesis and are induced by tissue inflammation and hypoxia. The purpose of this study was to investigate whether serum VEGF and Ang-2 are associated with the presence of hemoptysis and the extent of systemic inflammation in patients with inflammatory lung diseases. MATERIALS AND METHODS We prospectively enrolled 52 patients with inflammatory lung disease between June 2008 and October 2009. RESULTS The median values of VEGF and Ang-2 were 436 pg/mL and 2383 pg/mL, respectively. There was a significant positive correlation between serum Ang-2 and VEGF levels. VEGF levels were not significantly different according to the presence of hemoptysis. C-reactive protein (CRP) and Ang-2 level were significantly higher in patients without hemoptysis (n=26) than in those with hemoptysis (n=26; p<0.001 and p<0.001, respectively). CRP and arterial oxygen tension (PaO₂) were significantly correlated with both serum VEGF (p=0.032 and p=0.016, respectively) and Ang-2 levels (p<0.001 and p=0.041, respectively), after adjusting for other factors. Age and the absence of hemoptysis were factors correlated with serum Ang-2 levels. CONCLUSION Our study suggests that serum VEGF and Ang-2 levels are associated with PaO₂ and the severity of inflammation rather than the presence of hemoptysis in patients with inflammatory lung diseases. Thus, hemoptysis may not be mediated by increased serum levels of VEGF and Ang-2 in patients with inflammatory lung diseases, and further studies are required to determine the mechanisms of hemoptysis.
Collapse
Affiliation(s)
- Hye Yun Park
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Cho Rom Hahm
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Kyeongman Jeon
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Won-Jung Koh
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Gee Young Suh
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Man Pyo Chung
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Hojoong Kim
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - O Jung Kwon
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Sang-Won Um
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| |
Collapse
|
48
|
Suárez-González D, Lee JS, Lan Levengood SK, Vanderby R, Murphy WL. Mineral coatings modulate β-TCP stability and enable growth factor binding and release. Acta Biomater 2012; 8:1117-24. [PMID: 22154864 DOI: 10.1016/j.actbio.2011.11.028] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2011] [Revised: 11/09/2011] [Accepted: 11/21/2011] [Indexed: 12/24/2022]
Abstract
β-Tricalcium phosphate (β-TCP) is an attractive ceramic for bone tissue repair because of its similar composition to bone mineral and its osteoconductivity. However, compared with other ceramics β-TCP has a rapid and uncontrolled rate of degradation. In the current study β-TCP granules were mineral coated with the aim of influencing the dissolution rate of β-TCP, and also to use the coating as a carrier for controlled release of the growth factors recombinant human vascular endothelial growth factor (rhVEGF), modular VEGF peptide (mVEGF), and modular bone morphogenetic protein 2 peptide (mBMP2). The biomineral coatings were formed by heterogeneous nucleation in aqueous solution using simulated body fluid solutions with varying concentrations of bicarbonate (HCO(3)). Our results demonstrate that we could coat β-TCP granules with mineral layers possessing different dissolution properties. The presence of a biomineral coating delays the dissolution rate of the β-TCP granules. As the carbonate (CO(3)(2-)) content in the coating was increased the dissolution rate of the coated β-TCP also increased, but remained slower than the dissolution of uncoated β-TCP. In addition, we showed sustained release of multiple growth factors, with release kinetics that were controllable by varying the identity of the growth factor or the CO(3)(2-) content in the mineral coating. Released rhVEGF induced human umbilical vein endothelial cell (HUVEC) proliferation, and mVEGF enhanced migration of mouse embryonic endothelial cells in a scratch wound healing assay, indicating that each released growth factor was biologically active.
Collapse
|
49
|
Angiogenic response of endothelial cells to fibronectin. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2012; 749:131-51. [PMID: 22695843 DOI: 10.1007/978-1-4614-3381-1_10] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
|
50
|
Soleti R, Martinez MC. Sonic Hedgehog on microparticles and neovascularization. VITAMINS AND HORMONES 2012; 88:395-438. [PMID: 22391314 DOI: 10.1016/b978-0-12-394622-5.00018-3] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Neovascularization represents a pivotal process consisting in the development of vascular network during embryogenesis and adult life. Postnatally, it arises mainly through angiogenesis, which has physiological and pathological roles in health and disease. Blood vessel formation results as tightly regulated multistep process which needs coordination and precise regulation of the balance of proangiogenic and antiangiogenic factors. Sonic Hedgehog (SHH), a morphogen belonging to Hedgehog (HH) family proteins, is implicated in a remarkably wide variety of process, including vessel development. Recent evidence demonstrate that, in addition to the classic factors, microvesicles (MVs), both microparticles (MPs) and exosomes, small vesicles released distinct cellular compartments, are involved in modulation of neovascularization. MPs generated from T lymphocytes undergoing both activation and apoptosis harbor at their surface SHH and play a crucial role in modulation of neovascularization. They are able to modulate the different steps implicated in angiogenesis process in vitro and to enhance postischemic neovascularization in vivo. As the consequence, we suggest that the MPs carrying SHH contribute to generation of a vascular network and may represent a new therapeutic approach to treat pathologies associated with failed angiogenesis.
Collapse
|