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Das M, Mondal S, Ghosh R, Darbar S, Roy L, Das AK, Pal D, Bhattacharya SS, Mallick AK, Kundu JK, Pal SK. A study of scarless wound healing through programmed inflammation, proliferation and maturation using a redox balancing nanogel. J Biomed Mater Res A 2024; 112:1594-1611. [PMID: 38545912 DOI: 10.1002/jbm.a.37712] [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: 01/10/2024] [Revised: 03/15/2024] [Accepted: 03/19/2024] [Indexed: 07/12/2024]
Abstract
In the study, we have shown the efficacy of an indigenously developed redox balancing chitosan gel with impregnated citrate capped Mn3O4 nanoparticles (nanogel). Application of the nanogel on a wound of preclinical mice model shows role of various signaling molecules and growth factors, and involvement of reactive oxygen species (ROS) at every stage, namely hemostasis, inflammation, and proliferation leading to complete maturation for the scarless wound healing. While in vitro characterization of nanogel using SEM, EDAX, and optical spectroscopy reveals pH regulated redox buffering capacity, in vivo preclinical studies on Swiss albino involving IL-12, IFN-γ, and α-SMA signaling molecules and detailed histopathological investigation and angiogenesis on every stage elucidate role of redox buffering for the complete wound healing process.
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Affiliation(s)
- Monojit Das
- Department of Zoology, Vidyasagar University, Midnapore, India
- Department of Zoology, Uluberia College, University of Calcutta, Howrah, India
| | - Susmita Mondal
- Department of Chemical, and Biological Sciences, S. N. Bose National Centre for Basic Sciences, Kolkata, India
| | - Ria Ghosh
- Department of Chemical, and Biological Sciences, S. N. Bose National Centre for Basic Sciences, Kolkata, India
- Department of Biochemistry, University of Calcutta, Kolkata, India
| | - Soumendra Darbar
- Research and Development Division, Dey's Medical Stores (Mfg.) Ltd, Kolkata, India
| | - Lopamudra Roy
- Department of Applied Optics and Photonics, University of Calcutta, Kolkata, West Bengal, India
| | - Anjan Kumar Das
- Department of Pathology, Coochbehar Government Medical College and Hospital, India
| | - Debasish Pal
- Department of Zoology, Uluberia College, University of Calcutta, Howrah, India
| | | | - Asim Kumar Mallick
- Department of Pediatrics, Nil RatanSircar Medical College and Hospital, Kolkata, India
| | | | - Samir Kumar Pal
- Department of Zoology, Uluberia College, University of Calcutta, Howrah, India
- Department of Chemical, and Biological Sciences, S. N. Bose National Centre for Basic Sciences, Kolkata, India
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2
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Grim-19 plays a key role in mitochondrial steroidogenic acute regulatory protein stability and ligand-binding properties in Leydig cells. J Biol Chem 2022; 298:102671. [PMID: 36334625 PMCID: PMC9768377 DOI: 10.1016/j.jbc.2022.102671] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2022] [Revised: 10/25/2022] [Accepted: 10/28/2022] [Indexed: 11/06/2022] Open
Abstract
Grim-19 (gene associated with retinoid-IFN-induced mortality 19), the essential component of complex I of mitochondrial respiratory chain, functions as a noncanonical tumor suppressor by controlling apoptosis and energy metabolism. However, additional biological actions of Grim-19 have been recently suggested in male reproduction. We investigated here the expression and functional role of Grim-19 in murine testis. Testicular Grim-19 expression was detected from mouse puberty and increased progressively thereafter, and GRIM-19 protein was observed to be expressed exclusively in interstitial Leydig cells (LCs), with a prominent mitochondrial localization. In vivo lentiviral vector-mediated knockdown of Grim-19 resulted in a significant decrease in testosterone production and triggered aberrant oxidative stress in testis, thus impairing male fertility by inducing germ cell apoptosis and oligozoospermia. The control of testicular steroidogenesis by GRIM-19 was validated using the in vivo knockdown model with isolated primary LCs and in vitro experiments with MA-10 mouse Leydig tumor cells. Mechanistically, we suggest that the negative regulation exerted by GRIM-19 deficiency-induced oxidative stress on steroidogenesis may be the result of two phenomena: a direct effect through inhibition of phosphorylation of steroidogenic acute regulatory protein (StAR) and subsequent impediment to StAR localization in mitochondria and an indirect pathway that is to facilitate the inhibiting role exerted by the extracellular matrix on the steroidogenic capacity of LCs via promotion of integrin activation. Altogether, our observations suggest that Grim-19 plays a potent role in testicular steroidogenesis and that its alterations may contribute to testosterone deficiency-related disorders linked to metabolic stress and male infertility.
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3
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Kim YJ, Cho MJ, Yu WD, Kim MJ, Kim SY, Lee JH. Links of Cytoskeletal Integrity with Disease and Aging. Cells 2022; 11:cells11182896. [PMID: 36139471 DOI: 10.3390/cells11182896] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2022] [Revised: 09/09/2022] [Accepted: 09/10/2022] [Indexed: 11/16/2022] Open
Abstract
Aging is a complex feature and involves loss of multiple functions and nonreversible phenotypes. However, several studies suggest it is possible to protect against aging and promote rejuvenation. Aging is associated with many factors, such as telomere shortening, DNA damage, mitochondrial dysfunction, and loss of homeostasis. The integrity of the cytoskeleton is associated with several cellular functions, such as migration, proliferation, degeneration, and mitochondrial bioenergy production, and chronic disorders, including neuronal degeneration and premature aging. Cytoskeletal integrity is closely related with several functional activities of cells, such as aging, proliferation, degeneration, and mitochondrial bioenergy production. Therefore, regulation of cytoskeletal integrity may be useful to elicit antiaging effects and to treat degenerative diseases, such as dementia. The actin cytoskeleton is dynamic because its assembly and disassembly change depending on the cellular status. Aged cells exhibit loss of cytoskeletal stability and decline in functional activities linked to longevity. Several studies reported that improvement of cytoskeletal stability can recover functional activities. In particular, microtubule stabilizers can be used to treat dementia. Furthermore, studies of the quality of aged oocytes and embryos revealed a relationship between cytoskeletal integrity and mitochondrial activity. This review summarizes the links of cytoskeletal properties with aging and degenerative diseases and how cytoskeletal integrity can be modulated to elicit antiaging and therapeutic effects.
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Affiliation(s)
- Yu Jin Kim
- CHA Fertility Center Seoul Station, Jung-gu, Seoul 04637, Korea
| | - Min Jeong Cho
- CHA Fertility Center Seoul Station, Jung-gu, Seoul 04637, Korea
| | - Won Dong Yu
- Department of Biomedical Sciences, College of Life Science, CHA University, Pochen 11160, Korea
| | - Myung Joo Kim
- CHA Fertility Center Seoul Station, Jung-gu, Seoul 04637, Korea
| | - Sally Yunsun Kim
- National Heart and Lung Institute, Imperial College London, London SW7 2AZ, UK
| | - Jae Ho Lee
- CHA Fertility Center Seoul Station, Jung-gu, Seoul 04637, Korea
- Department of Biomedical Sciences, College of Life Science, CHA University, Pochen 11160, Korea
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Shao Z, Chwa M, Atilano SR, Park J, Karageozian H, Karageozian V, Kenney MC. The Transcriptome Profile of Retinal Pigment Epithelium and Müller Cell Lines Protected by Risuteganib Against Hydrogen Peroxide Stress. J Ocul Pharmacol Ther 2022; 38:513-526. [PMID: 35731128 PMCID: PMC9508878 DOI: 10.1089/jop.2022.0015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Abstract
Purpose: Oxidative stress contributes to the pathogenesis of vision-impairing diseases. In the retina, retinal pigment epithelium (RPE) and Müller cells support neuronal homeostasis, but also contribute to pathological development under stressed conditions. Recent studies found that the investigational drug risuteganib (RSG) has a good safety profile, provided protection in experimental models, and improved visual acuity in patients. The present in vitro study evaluated the effects of RSG in RPE and Müller cell lines stressed with the oxidant hydrogen peroxide (H2O2). Methods: Human RPE (ARPE-19) and Müller (MIO-M1) cell lines were treated with various combinations of RSG and H2O2. Trypan blue assay was used to investigate the effect of compounds on cell viability. Gene expression was measured using RNA sequencing to identify regulated genes and the biological processes and pathways involved. Results: Trypan blue assay found RSG pre-treatment significantly protected against H2O2-induced cell death in ARPE-19 and MIO-M1 cells. Transcriptome analysis found H2O2 regulated genes in several disease-relevant biological processes, including cell adhesion, migration, death, and proliferation; ECM organization; angiogenesis; metabolism; and immune system processes. RSG pre-treatment modulated these gene expression profiles in the opposite direction of H2O2. Pathway analysis found genes in integrin, AP-1, and syndecan signaling pathways were regulated. Expression of selected RSG-regulated genes was validated using qRT-PCR. Conclusions: RSG protected cultured human RPE and Müller cell lines against H2O2-induced cell death and mitigated the associated transcriptome changes in biological processes and pathways relevant to the pathogenesis of retinal diseases. These results demonstrate RSG reduced oxidative stress-induced toxicity in two retinal cell lines with potential relevance to the treatment of human diseases.
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Affiliation(s)
- Zixuan Shao
- Allegro Ophthalmics, LLC, San Juan Capistrano, California, USA
| | - Marilyn Chwa
- Gavin Herbert Eye Institute, University of California Irvine, Irvine, California, USA
| | - Shari R Atilano
- Gavin Herbert Eye Institute, University of California Irvine, Irvine, California, USA
| | - John Park
- Allegro Ophthalmics, LLC, San Juan Capistrano, California, USA
| | | | | | - M Cristina Kenney
- Gavin Herbert Eye Institute, University of California Irvine, Irvine, California, USA.,Department of Pathology and Laboratory Medicine, University of California Irvine, Irvine, California, USA
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5
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Guo CL. Self-Sustained Regulation or Self-Perpetuating Dysregulation: ROS-dependent HIF-YAP-Notch Signaling as a Double-Edged Sword on Stem Cell Physiology and Tumorigenesis. Front Cell Dev Biol 2022; 10:862791. [PMID: 35774228 PMCID: PMC9237464 DOI: 10.3389/fcell.2022.862791] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2022] [Accepted: 04/29/2022] [Indexed: 12/19/2022] Open
Abstract
Organ development, homeostasis, and repair often rely on bidirectional, self-organized cell-niche interactions, through which cells select cell fate, such as stem cell self-renewal and differentiation. The niche contains multiplexed chemical and mechanical factors. How cells interpret niche structural information such as the 3D topology of organs and integrate with multiplexed mechano-chemical signals is an open and active research field. Among all the niche factors, reactive oxygen species (ROS) have recently gained growing interest. Once considered harmful, ROS are now recognized as an important niche factor in the regulation of tissue mechanics and topology through, for example, the HIF-YAP-Notch signaling pathways. These pathways are not only involved in the regulation of stem cell physiology but also associated with inflammation, neurological disorder, aging, tumorigenesis, and the regulation of the immune checkpoint molecule PD-L1. Positive feedback circuits have been identified in the interplay of ROS and HIF-YAP-Notch signaling, leading to the possibility that under aberrant conditions, self-organized, ROS-dependent physiological regulations can be switched to self-perpetuating dysregulation, making ROS a double-edged sword at the interface of stem cell physiology and tumorigenesis. In this review, we discuss the recent findings on how ROS and tissue mechanics affect YAP-HIF-Notch-PD-L1 signaling, hoping that the knowledge can be used to design strategies for stem cell-based and ROS-targeting therapy and tissue engineering.
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Affiliation(s)
- Chin-Lin Guo
- Institute of Physics, Academia Sinica, Taipei, Taiwan
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6
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Zanardi A, Barbariga M, Conti A, Vegliani F, Curnis F, Alessio M. Oxidized/deamidated-ceruloplasmin dysregulates choroid plexus epithelial cells functionality and barrier properties via RGD-recognizing integrin binding. Neurobiol Dis 2021; 158:105474. [PMID: 34384868 DOI: 10.1016/j.nbd.2021.105474] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2021] [Revised: 08/04/2021] [Accepted: 08/05/2021] [Indexed: 11/19/2022] Open
Abstract
Choroid plexus epithelial cells (CPEpiCs) determine the composition of cerebrospinal fluid (CSF) and constitute the blood-CSF barrier (BCSFB), functions that are altered in neurodegenerative diseases. In Parkinson's disease (PD) the pathological environment oxidizes and deamidates the ceruloplasmin, a CSF-resident ferroxidase, which undergoes a gain of RGD-recognizing integrin binding property, that may result in signal transduction. We investigated the effects that oxidized/deamidated ceruloplasmin (Cp-ox/de) may exert on CPEpiCs functions. Through RGD-recognizing integrins binding, Cp-ox/de mediates CPEpiCs adhesion and intracellular signaling, resulting in cell proliferation inhibition and alteration of the secretome profile in terms of proteins related to cell-extracellular matrix interaction. Oxidative conditions, comparable to those found in the CSF of PD patients, induced CPEpiCs barrier leakage, allowing Cp-ox/de to cross it, transducing integrins-mediated signal that further worsens BCSFB integrity. This mechanism might contribute to PD pathological processes altering CSF composition and aggravating the already compromised BCSFB function.
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Affiliation(s)
- Alan Zanardi
- Proteome Biochemistry, IRCCS-Ospedale San Raffaele, 20132 Milan, Italy.
| | - Marco Barbariga
- Proteome Biochemistry, IRCCS-Ospedale San Raffaele, 20132 Milan, Italy
| | - Antonio Conti
- Proteome Biochemistry, IRCCS-Ospedale San Raffaele, 20132 Milan, Italy.
| | - Franco Vegliani
- Proteome Biochemistry, IRCCS-Ospedale San Raffaele, 20132 Milan, Italy
| | - Flavio Curnis
- Tumor Biology and Vascular Targeting, IRCCS-Ospedale San Raffaele, 20132 Milan, Italy.
| | - Massimo Alessio
- Proteome Biochemistry, IRCCS-Ospedale San Raffaele, 20132 Milan, Italy.
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7
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Ceruloplasmin Deamidation in Neurodegeneration: From Loss to Gain of Function. Int J Mol Sci 2021; 22:ijms22020663. [PMID: 33440850 PMCID: PMC7827708 DOI: 10.3390/ijms22020663] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2020] [Revised: 01/08/2021] [Accepted: 01/08/2021] [Indexed: 02/07/2023] Open
Abstract
Neurodegenerative disorders can induce modifications of several proteins; one of which is ceruloplasmin (Cp), a ferroxidase enzyme found modified in the cerebrospinal fluid (CSF) of neurodegenerative diseases patients. Cp modifications are caused by the oxidation induced by the pathological environment and are usually associated with activity loss. Together with oxidation, deamidation of Cp was found in the CSF from Alzheimer’s and Parkinson’s disease patients. Protein deamidation is a process characterized by asparagine residues conversion in either aspartate or isoaspartate, depending on protein sequence/structure and cellular environment. Cp deamidation occurs at two Asparagine-Glycine-Arginine (NGR)-motifs which, once deamidated to isoAspartate-Glycine-Arginine (isoDGR), bind integrins, a family of receptors mediating cell adhesion. Therefore, on the one hand, Cp modifications lead to loss of enzymatic activity, while on the other hand, these alterations confer gain of function to Cp. In fact, deamidated Cp binds to integrins and triggers intracellular signaling on choroid plexus epithelial cells, changing cell functioning. Working in concert with the oxidative environment, Cp deamidation could reach different target cells in the brain, altering their physiology and causing detrimental effects, which might contribute to the pathological mechanism.
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8
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Effects of direct high sodium exposure at endothelial cell migration. Biochem Biophys Res Commun 2019; 514:1257-1263. [PMID: 31113617 DOI: 10.1016/j.bbrc.2019.05.103] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2019] [Accepted: 05/14/2019] [Indexed: 02/05/2023]
Abstract
The present study aimed to test the hypothesis that high sodium affects the migratory phenotype of endothelial cells (EC) and investigates mechanisms involved independently of hemodynamic factors. Cell migration was evaluated by Wound-Healing at conditions: High Sodium (HS; 160 mM) and Control (CT; 140 mM). O2- production was evaluated by DHE. NADPH oxidase activity was determined by chemiluminescence assay. Expression of adhesion molecules was analyzed by RT-PCR. Shear Stress was performed using a rhythmic shake. Nitric oxide production was measured by Griess reaction. HS-induced impairment in EC migration while both Candesartan and DPI prevented it. HS increased NADPH oxidase activity, which was blocked by Candesartan. Also, HS increased O2- production that was inhibited by Candesartan. HS decreased adhesion molecules expression via ROS (Integrin Alpha 5, Integrin Beta 1, Integrin Beta 3, VE-Cadherin and PECAM) and via AT1R (PECAM). The nitric oxide production induced by shear stress was decreased after EC exposure to HS while both Candesartan and DPI prevented it. Conclusion: This study demonstrated that HS reduced EC migration by AT1R and ROS derived from NADPH Oxidase and mitochondria. The HS reduction in adhesion molecules expression modulated by ROS and AT1R may help to explain the impairment in migration capacity. Also, HS affected EC functionality by reducing their nitric oxide production in response to shear stress.
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9
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Xu Q, Huff LP, Fujii M, Griendling KK. Redox regulation of the actin cytoskeleton and its role in the vascular system. Free Radic Biol Med 2017; 109:84-107. [PMID: 28285002 PMCID: PMC5497502 DOI: 10.1016/j.freeradbiomed.2017.03.004] [Citation(s) in RCA: 78] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/22/2016] [Revised: 02/17/2017] [Accepted: 03/06/2017] [Indexed: 12/17/2022]
Abstract
The actin cytoskeleton is critical for form and function of vascular cells, serving mechanical, organizational and signaling roles. Because many cytoskeletal proteins are sensitive to reactive oxygen species, redox regulation has emerged as a pivotal modulator of the actin cytoskeleton and its associated proteins. Here, we summarize work implicating oxidants in altering actin cytoskeletal proteins and focus on how these alterations affect cell migration, proliferation and contraction of vascular cells. Finally, we discuss the role of oxidative modification of the actin cytoskeleton in vivo and highlight its importance for vascular diseases.
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Affiliation(s)
- Qian Xu
- Division of Cardiology, Department of Medicine, Emory University, 101 Woodruff Circle, 308a WMB, Atlanta, GA 30322, United States; Department of Cardiovascular Medicine, Xiangya Hospital, Central South University, Changsha, China
| | - Lauren P Huff
- Division of Cardiology, Department of Medicine, Emory University, 101 Woodruff Circle, 308a WMB, Atlanta, GA 30322, United States
| | - Masakazu Fujii
- Department of Medicine and Bioregulatory Science, Graduate School of Medical Sciences, Kyushu University, Japan
| | - Kathy K Griendling
- Division of Cardiology, Department of Medicine, Emory University, 101 Woodruff Circle, 308a WMB, Atlanta, GA 30322, United States.
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Yurdagul A, Orr AW. Blood Brothers: Hemodynamics and Cell-Matrix Interactions in Endothelial Function. Antioxid Redox Signal 2016; 25:415-34. [PMID: 26715135 PMCID: PMC5011636 DOI: 10.1089/ars.2015.6525] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/08/2015] [Revised: 11/25/2015] [Accepted: 12/23/2015] [Indexed: 12/29/2022]
Abstract
SIGNIFICANCE Alterations in endothelial function contribute to a variety of vascular diseases. In pathological conditions, the endothelium shows a reduced ability to regulate vasodilation (endothelial dysfunction) and a conversion toward a proinflammatory and leaky phenotype (endothelial activation). At the interface between the vessel wall and blood, the endothelium exists in a complex microenvironment and must translate changes in these environmental signals to alterations in vessel function. Mechanical stimulation and endothelial cell interactions with the vascular matrix, as well as a host of soluble factors, coordinately contribute to this dynamic regulation. RECENT ADVANCES Blood hemodynamics play an established role in the regulation of endothelial function. However, a growing body of work suggests that subendothelial matrix composition similarly and coordinately regulates endothelial cell phenotype such that blood flow affects matrix remodeling, which affects the endothelial response to flow. CRITICAL ISSUES Hemodynamics and soluble factors likely affect endothelial matrix remodeling through multiple mechanisms, including transforming growth factor β signaling and alterations in cell-matrix receptors, such as the integrins. Likewise, differential integrin signaling following matrix remodeling appears to regulate several key flow-induced responses, including nitric oxide production, regulation of oxidant stress, and activation of proinflammatory signaling and gene expression. Microvascular remodeling responses, such as angiogenesis and arteriogenesis, may also show coordinated regulation by flow and matrix. FUTURE DIRECTIONS Identifying the mechanisms regulating the dynamic interplay between hemodynamics and matrix remodeling and their contribution to the pathogenesis of cardiovascular disease remains an important research area with therapeutic implications across a variety of conditions. Antioxid. Redox Signal. 25, 415-434.
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Affiliation(s)
- Arif Yurdagul
- Department of Cell Biology and Anatomy, Louisiana State University Health Sciences Center–Shreveport, Shreveport, Louisiana
| | - A. Wayne Orr
- Department of Cell Biology and Anatomy, Louisiana State University Health Sciences Center–Shreveport, Shreveport, Louisiana
- Department of Pathology and Translational Pathobiology, Louisiana State University Health Sciences Center–Shreveport, Shreveport, Louisiana
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11
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Banerjee P, Mehta A, Shanthi C. Investigation into the cyto-protective and wound healing properties of cryptic peptides from bovine Achilles tendon collagen. Chem Biol Interact 2014; 211:1-10. [DOI: 10.1016/j.cbi.2014.01.002] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2013] [Revised: 12/03/2013] [Accepted: 01/07/2014] [Indexed: 11/26/2022]
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12
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Sangani R, Pandya CD, Bhattacharyya MH, Periyasamy-Thandavan S, Chutkan N, Markand S, Hill WD, Hamrick M, Isales C, Fulzele S. Knockdown of SVCT2 impairs in-vitro cell attachment, migration and wound healing in bone marrow stromal cells. Stem Cell Res 2013; 12:354-63. [PMID: 24365600 DOI: 10.1016/j.scr.2013.11.002] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/28/2013] [Revised: 10/01/2013] [Accepted: 11/03/2013] [Indexed: 11/28/2022] Open
Abstract
Bone marrow stromal cell (BMSC) adhesion and migration are fundamental to a number of pathophysiologic processes, including fracture and wound healing. Vitamin C is beneficial for bone formation, fracture repair and wound healing. However, the role of the vitamin C transporter in BMSC adhesion, migration and wound healing is not known. In this study, we knocked-down the sodium-dependent vitamin C transporter, SVCT2, the only known transporter of vitamin C in BMSCs, and performed cell adhesion, migration, in-vitro scratch wound healing and F-actin re-arrangement studies. We also investigated the role of oxidative stress on the above processes. Our results demonstrate that both oxidative stress and down-regulation of SVCT2 decreased cell attachment and spreading. A trans-well cell migration assay showed that vitamin C helped in BMSC migration and that knockdown of SVCT2 decreased cell migration. In the in-vitro scratch wound healing studies, we established that oxidative stress dose-dependently impairs wound healing. Furthermore, the supplementation of vitamin C significantly rescued the BMSCs from oxidative stress and increased wound closing. The knockdown of SVCT2 in BMSCs strikingly decreased wound healing, and supplementing with vitamin C failed to rescue cells efficiently. The knockdown of SVCT2 and induction of oxidative stress in cells produced an alteration in cytoskeletal dynamics. Signaling studies showed that oxidative stress phosphorylated members of the MAP kinase family (p38) and that vitamin C inhibited their phosphorylation. Taken together, these results indicate that both the SVCT2 transporter and oxidative stress play a vital role in BMSC attachment, migration and cytoskeletal re-arrangement. BMSC-based cell therapy and modulation of SVCT2 could lead to a novel therapeutic approach that enhances bone remodeling, fracture repair and wound healing in chronic disease conditions.
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Affiliation(s)
- Rajnikumar Sangani
- Department of Orthopaedic Surgery, Georgia Regents University, Augusta, GA 30912, USA
| | - Chirayu D Pandya
- Department of Psychiatry and Health Behavior, Georgia Regents University, Augusta, GA 30912, USA
| | | | | | - Norman Chutkan
- Department of Orthopaedic Surgery, Georgia Regents University, Augusta, GA 30912, USA
| | - Shanu Markand
- Cellular Biology and Anatomy, Georgia Regents University, Augusta, GA 30912, USA
| | - William D Hill
- Cellular Biology and Anatomy, Georgia Regents University, Augusta, GA 30912, USA; Institute of Regenerative and Reparative Medicine, Georgia Regents University, Augusta, GA 30912, USA
| | - Mark Hamrick
- Cellular Biology and Anatomy, Georgia Regents University, Augusta, GA 30912, USA; Institute of Regenerative and Reparative Medicine, Georgia Regents University, Augusta, GA 30912, USA
| | - Carlos Isales
- Department of Orthopaedic Surgery, Georgia Regents University, Augusta, GA 30912, USA; Institute of Regenerative and Reparative Medicine, Georgia Regents University, Augusta, GA 30912, USA
| | - Sadanand Fulzele
- Department of Orthopaedic Surgery, Georgia Regents University, Augusta, GA 30912, USA; Institute of Regenerative and Reparative Medicine, Georgia Regents University, Augusta, GA 30912, USA.
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Ulyanova T, Jiang Y, Padilla SM, Papayannopoulou T. Erythroid cells generated in the absence of specific β1-integrin heterodimers accumulate reactive oxygen species at homeostasis and are unable to mount effective antioxidant defenses. Haematologica 2013; 98:1769-77. [PMID: 23812936 DOI: 10.3324/haematol.2013.087577] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
We have previously reported that β1(Δ/Δ) mice have a markedly impaired response to hemolytic stress, but the mechanisms of this were unclear. In the present study we explored in detail quantitative, phenotypic and functional aspects of erythropoiesis at homeostasis in a large number of animals for each of 3 murine models with specific β1 heterodimer integrin deficiencies. We found that, at homeostasis, β1-deficient mice have a modest uncompensated anemia with ineffective erythropoiesis and decreased red blood cell survival. Mice lacking only α4 integrins (α4β1/α4β7) do not share this phenotype. There is an increased tendency for reactive oxygen species accumulation in β1(Δ/Δ) erythroid cells with decreased anti-oxidant defenses at homeostasis which are exaggerated after stress. Furthermore, expansion of erythroid cells in spleen post-stress is dependent on α5β1, likely through mechanisms activating focal adhesion kinase complexes that are distinct from α4β1-mediated responses. In vivo inhibition of focal adhesion kinase activation partially recapitulates the β1(Δ/Δ) stress response. Mice lacking all α4 and β1 integrins (double knockouts) had, at homeostasis, the most severe phenotype with selective impairment of erythroid responses. The fact that integrins participate in mitigating stress in erythroid cells through redox activation of distinct signaling pathways by specific integrin heterodimers is a link that has not been appreciated until now.
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17-β-Estradiol counteracts the effects of high frequency electromagnetic fields on trophoblastic connexins and integrins. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2013; 2013:280850. [PMID: 23819010 PMCID: PMC3683487 DOI: 10.1155/2013/280850] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/18/2013] [Accepted: 05/11/2013] [Indexed: 01/17/2023]
Abstract
We investigated the effect of high-frequency electromagnetic fields (HF-EMFs) and 17-β-estradiol on connexins (Cxs), integrins (Ints), and estrogen receptor (ER) expression, as well as on ultrastructure of trophoblast-derived HTR-8/SVneo cells. HF-EMF, 17-β-estradiol, and their combination induced an increase of Cx40 and Cx43 mRNA expression. HF-EMF decreased Int alpha1 and β1 mRNA levels but enhanced Int alpha5 mRNA expression. All the Ints mRNA expressions were increased by 17-β-estradiol and exposure to both stimuli. ER-β mRNA was reduced by HF-EMF but augmented by 17-β-estradiol alone or with HF-EMF. ER-β immunofluorescence showed a cytoplasmic localization in sham and HF-EMF exposed cells which became nuclear after treatment with hormone or both stimuli. Electron microscopy evidenced a loss of cellular contact in exposed cells which appeared counteracted by 17-β-estradiol. We demonstrate that 17-β-estradiol modulates Cxs and Ints as well as ER-β expression induced by HF-EMF, suggesting an influence of both stimuli on trophoblast differentiation and migration.
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Pongnimitprasert N, Hurtado M, Lamari F, El Benna J, Dupuy C, Fay M, Foglietti MJ, Bernard M, Gougerot-Pocidalo MA, Braut-Boucher F. Implication of NADPH oxidases in the early inflammation process generated by cystic fibrosis cells. ISRN INFLAMMATION 2012; 2012:481432. [PMID: 24049649 PMCID: PMC3765752 DOI: 10.5402/2012/481432] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/09/2012] [Accepted: 06/10/2012] [Indexed: 12/31/2022]
Abstract
In cystic fibrosis (CF) patients, pulmonary inflammation is a major cause of morbidity and mortality. The aim of this study was to further investigate whether oxidative stress could be involved in the early inflammatory process associated with CF pathogenesis. We used a model of CFTR defective epithelial cell line (IB3-1) and its reconstituted CFTR control (S9) cell line cultured in various ionic conditions. This study showed that IB3-1 and S9 cells expressed the NADPH oxidases (NOXs) DUOX1/2 and NOX2 at the same level. Nevertheless, several parameters participating in oxidative stress (increased ROS production and apoptosis, decreased total thiol content) were observed in IB3-1 cells cultured in hypertonic environment as compared to S9 cells and were inhibited by diphenyleneiodonium (DPI), a well-known inhibitor of NOXs; besides, increased production of the proinflammatory cytokines IL-6 and IL-8 by IB3-1 cells was also inhibited by DPI as compared to S9 cells. Furthermore, calcium ionophore (A23187), which upregulates DUOX and NOX2 activities, strongly induced oxidative stress and IL-8 and IL-6 overexpression in IB3-1 cells. All these events were suppressed by DPI, supporting the involvement of NOXs in the oxidative stress, which can upregulate proinflammatory cytokine production by the airway CFTR-deficient cells and trigger early pulmonary inflammation in CF patients.
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Affiliation(s)
- Nushjira Pongnimitprasert
- INSERM U-773, Centre de Recherche Biomédicale Bichat, Beaujon (CRB3), Faculté de Médecine Xavier Bichat, Université Paris Diderot Paris 7, 75018 Paris, France ; Département de Biochimie, UFR des Sciences Pharmaceutiques et Biologiques, Université Paris Descartes, Sorbonne Paris Cité, 75006 Paris, France
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Pei M, He F, Kish VL. Expansion on extracellular matrix deposited by human bone marrow stromal cells facilitates stem cell proliferation and tissue-specific lineage potential. Tissue Eng Part A 2011; 17:3067-76. [PMID: 21740327 DOI: 10.1089/ten.tea.2011.0158] [Citation(s) in RCA: 84] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Our objective was to assess the rejuvenation effect of extracellular matrix (ECM) deposited by human bone marrow stromal cells (hBMSCs) on hBMSC expansion and tissue-specific lineage differentiation potential. Passage 5 hBMSCs were expanded on ECM or conventional plastic flasks (Plastic) for one passage. Cell number was counted and immunophenotype profiles were assessed using flow cytometry. Selected integrins and proliferation-related pathway signals were assessed using Western blot. The expanded cells were evaluated for their chondrogenic potential in a pellet culture system with TGF-β3-containing chondrogenic medium using gross morphology, histology, immunostaining, biochemical analysis, real-time polymerase chain reaction, Western blot, and biomechanical testing. ECM-expanded hBMSCs were further evaluated for their osteogenic potential using Alizarin Red S staining and alkaline phosphatase activity assay and for their adipogenic potential using Oil Red O staining. ECM-expanded hBMSCs exhibited an enhanced proliferation capacity and an acquired robust chondrogenic potential compared to those grown on Plastic. ECM expansion decreased intracellular reactive oxygen species and increased stage-specific embryonic antigen-4 expression in hBMSCs. ECM expansion also upregulated integrins α2 and β5 and induced a sustained activation of Erk1/2 and cyclin D1. Interestingly, upregulation of TGF-β receptor II during cell expansion and chondrogenic induction might be responsible for an enhanced chondrogenic potential in ECM-expanded hBMSCs. We also found that ECM-expanded hBMSCs had an increased osteogenic potential and decreased adipogenic capacity. ECM deposited by hBMSCs may be a promising approach to expand BMSCs from elderly patients for the treatment of large-scale bone defects through endochondral bone formation.
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Affiliation(s)
- Ming Pei
- Stem Cell and Tissue Engineering Laboratory, Division of Exercise Physiology, Department of Orthopaedics, West Virginia University, Morgantown, WV 26506-9196, USA.
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Shewchuk LJ, Bryan S, Ulanova M, Khaper N. Integrin β3 prevents apoptosis of HL-1 cardiomyocytes under conditions of oxidative stressThis article is one of a selection of papers published in a Special Issue on Oxidative Stress in Health and Disease. Can J Physiol Pharmacol 2010; 88:324-30. [DOI: 10.1139/y09-131] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Integrin receptors are essential in the regulation of vital cardiac functions, and impaired integrin activity has been associated with cardiac remodeling. Oxidative stress is known to be involved in apoptosis and cardiac remodeling and thus may profoundly influence cardiac function via integrin modulation. The aim of this study was to determine the expression pattern and functional role of integrins in HL-1 cardiomyocytes under conditions of oxidative stress. Gene expression was studied by end-point and real-time PCR; surface protein expression was studied by flow cytometry; integrin knockdown was accomplished by siRNA gene silencing; and apoptosis was studied by annexin V staining and active caspase-3/7 using flow cytometry. Among the various subunits under study (αv, α5, α6, and β1, β3, β4, and β5), the expression of β3 integrin was significantly increased at both the mRNA and protein levels in cardiomyocytes exposed to 100 µmol/L hydrogen peroxide for 3 h. Gene silencing of β3 integrin by using siRNA resulted in a 2-fold increase in cardiomyocyte apoptosis upon treatment with hydrogen peroxide. This increase in apoptosis, as measured by annexin V staining, correlated with an increase in active caspase-3/7. Integrin β3 plays a vital role in preventing cardiomyocyte apoptosis under conditions of oxidative stress.
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Affiliation(s)
- Lee J. Shewchuk
- Medical Sciences Division, Northern Ontario School of Medicine, Lakehead University, 955 Oliver Road, Thunder Bay, ON P7B 5E1, Canada
- Department of Biology, Lakehead University, Thunder Bay, ON P7B 5E1, Canada
| | - Sean Bryan
- Medical Sciences Division, Northern Ontario School of Medicine, Lakehead University, 955 Oliver Road, Thunder Bay, ON P7B 5E1, Canada
- Department of Biology, Lakehead University, Thunder Bay, ON P7B 5E1, Canada
| | - Marina Ulanova
- Medical Sciences Division, Northern Ontario School of Medicine, Lakehead University, 955 Oliver Road, Thunder Bay, ON P7B 5E1, Canada
- Department of Biology, Lakehead University, Thunder Bay, ON P7B 5E1, Canada
| | - Neelam Khaper
- Medical Sciences Division, Northern Ontario School of Medicine, Lakehead University, 955 Oliver Road, Thunder Bay, ON P7B 5E1, Canada
- Department of Biology, Lakehead University, Thunder Bay, ON P7B 5E1, Canada
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