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Shosha E, Shahror RA, Morris CA, Xu Z, Lucas R, McGee-Lawrence ME, Rusch NJ, Caldwell RB, Fouda AY. The arginase 1/ornithine decarboxylase pathway suppresses HDAC3 to ameliorate the myeloid cell inflammatory response: implications for retinal ischemic injury. Cell Death Dis 2023; 14:621. [PMID: 37735154 PMCID: PMC10514323 DOI: 10.1038/s41419-023-06147-7] [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: 06/06/2023] [Revised: 09/06/2023] [Accepted: 09/12/2023] [Indexed: 09/23/2023]
Abstract
The enzyme arginase 1 (A1) hydrolyzes the amino acid arginine to form L-ornithine and urea. Ornithine is further converted to polyamines by the ornithine decarboxylase (ODC) enzyme. We previously reported that deletion of myeloid A1 in mice exacerbates retinal damage after ischemia/reperfusion (IR) injury. Furthermore, treatment with A1 protects against retinal IR injury in wild-type mice. PEG-A1 also mitigates the exaggerated inflammatory response of A1 knockout (KO) macrophages in vitro. Here, we sought to identify the anti-inflammatory pathway that confers macrophage A1-mediated protection against retinal IR injury. Acute elevation of intraocular pressure was used to induce retinal IR injury in mice. A multiplex cytokine assay revealed a marked increase in the inflammatory cytokines interleukin 1β (IL-1β) and tumor necrosis factor α (TNF-α) in the retina at day 5 after IR injury. In vitro, blocking the A1/ODC pathway augmented IL-1β and TNF-α production in stimulated macrophages. Furthermore, A1 treatment attenuated the stimulated macrophage metabolic switch to a pro-inflammatory glycolytic phenotype, whereas A1 deletion had the opposite effect. Screening for histone deacetylases (HDACs) which play a role in macrophage inflammatory response showed that A1 deletion or ODC inhibition increased the expression of HDAC3. We further showed the involvement of HDAC3 in the upregulation of TNF-α but not IL-1β in stimulated macrophages deficient in the A1/ODC pathway. Investigating HDAC3 KO macrophages showed a reduced inflammatory response and a less glycolytic phenotype upon stimulation. In vivo, HDAC3 co-localized with microglia/macrophages at day 2 after IR in WT retinas and was further increased in A1-deficient retinas. Collectively, our data provide initial evidence that A1 exerts its anti-inflammatory effect in macrophages via ODC-mediated suppression of HDAC3 and IL-1β. Collectively we propose that interventions that augment the A1/ODC pathway and inhibit HDAC3 may confer therapeutic benefits for the treatment of retinal ischemic diseases.
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Affiliation(s)
- Esraa Shosha
- Department of Pharmacology and Toxicology, College of Medicine, University of Arkansas for Medical Sciences, Little Rock, AR, USA
- Department of Clinical Pharmacy, Faculty of Pharmacy, Cairo University, Cairo, Egypt
| | - Rami A Shahror
- Department of Pharmacology and Toxicology, College of Medicine, University of Arkansas for Medical Sciences, Little Rock, AR, USA
| | - Carol A Morris
- Department of Pharmacology and Toxicology, College of Medicine, University of Arkansas for Medical Sciences, Little Rock, AR, USA
| | - Zhimin Xu
- Vascular Biology Center, Augusta University, Augusta, GA, USA
- Culver Vision Discovery Institute, Augusta University, Augusta, GA, USA
| | - Rudolf Lucas
- Vascular Biology Center, Augusta University, Augusta, GA, USA
| | | | - Nancy J Rusch
- Department of Pharmacology and Toxicology, College of Medicine, University of Arkansas for Medical Sciences, Little Rock, AR, USA
| | - Ruth B Caldwell
- Vascular Biology Center, Augusta University, Augusta, GA, USA
- Culver Vision Discovery Institute, Augusta University, Augusta, GA, USA
- Department of Cellular Biology and Anatomy, Augusta University, Augusta, GA, USA
| | - Abdelrahman Y Fouda
- Department of Pharmacology and Toxicology, College of Medicine, University of Arkansas for Medical Sciences, Little Rock, AR, USA.
- Department of Clinical Pharmacy, Faculty of Pharmacy, Cairo University, Cairo, Egypt.
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Pan F, Hu D, Sun LJ, Bai Q, Wang YS, Hou X. Valproate reduces retinal ganglion cell apoptosis in rats after optic nerve crush. Neural Regen Res 2023; 18:1607-1612. [PMID: 36571369 PMCID: PMC10075129 DOI: 10.4103/1673-5374.357913] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
The retinal ganglion cells of the optic nerve have a limited capacity for self-repair after injury. Valproate is a histone deacetylase inhibitor and multitarget drug, which has been demonstrated to protect retinal neurons. In this study, we established rat models of optic nerve-crush injury and injected valproate into the vitreous cavity immediately after modeling. We evaluated changes in the ultrastructure morphology of the endoplasmic reticulum of retinal ganglion cells over time via transmission electron microscope. Immunohistochemistry and western blot assay revealed that valproate upregulated the expression of the endoplasmic reticulum stress marker glucose-regulated protein 78 and downregulated the expression of transcription factor C/EBP homologous protein, phosphorylated eukaryotic translation initiation factor 2α, and caspase-12 in the endoplasmic reticulum of retinal ganglion cells. These findings suggest that valproate reduces apoptosis of retinal ganglion cells in the rat after optic nerve-crush injury by attenuating phosphorylated eukaryotic translation initiation factor 2α-C/EBP homologous protein signaling and caspase-12 activation during endoplasmic reticulum stress. These findings represent a newly discovered mechanism that regulates how valproate protects neurons.
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Affiliation(s)
- Feng Pan
- Eye Institute of Chinese PLA and Department of Ophthalmology, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi Province, China
| | - Dan Hu
- Eye Institute of Chinese PLA and Department of Ophthalmology, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi Province, China
| | - Li-Juan Sun
- Eye Institute of Chinese PLA and Department of Ophthalmology, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi Province, China
| | - Qian Bai
- Eye Institute of Chinese PLA and Department of Ophthalmology, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi Province, China
| | - Yu-Sheng Wang
- Eye Institute of Chinese PLA and Department of Ophthalmology, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi Province, China
| | - Xu Hou
- Eye Institute of Chinese PLA and Department of Ophthalmology, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi Province, China
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3
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Wang J, Feng S, Zhang Q, Qin H, Xu C, Fu X, Yan L, Zhao Y, Yao K. Roles of Histone Acetyltransferases and Deacetylases in the Retinal Development and Diseases. Mol Neurobiol 2023; 60:2330-2354. [PMID: 36637745 DOI: 10.1007/s12035-023-03213-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2022] [Accepted: 01/04/2023] [Indexed: 01/14/2023]
Abstract
The critical role of epigenetic modification of histones in maintaining the normal function of the nervous system has attracted increasing attention. Among these modifications, the level of histone acetylation, modulated by histone acetyltransferases (HATs) and histone deacetylases (HDACs), is essential in regulating gene expression. In recent years, the research progress on the function of HDACs in retinal development and disease has advanced remarkably, while that regarding HATs remains to be investigated. Here, we overview the roles of HATs and HDACs in regulating the development of diverse retinal cells, including retinal progenitor cells, photoreceptor cells, bipolar cells, ganglion cells, and Müller glial cells. The effects of HATs and HDACs on the progression of various retinal diseases are also discussed with the highlight of the proof-of-concept research regarding the application of available HDAC inhibitors in treating retinal diseases.
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Affiliation(s)
- Jingjing Wang
- Institute of Visual Neuroscience and Stem Cell Engineering, Wuhan University of Science and Technology, Wuhan, 430065, China.,College of Life Sciences and Health, Wuhan University of Science and Technology, Wuhan, 430065, China
| | - Shuyu Feng
- Institute of Visual Neuroscience and Stem Cell Engineering, Wuhan University of Science and Technology, Wuhan, 430065, China.,College of Life Sciences and Health, Wuhan University of Science and Technology, Wuhan, 430065, China
| | - Qian Zhang
- Institute of Visual Neuroscience and Stem Cell Engineering, Wuhan University of Science and Technology, Wuhan, 430065, China.,College of Life Sciences and Health, Wuhan University of Science and Technology, Wuhan, 430065, China
| | - Huan Qin
- Institute of Visual Neuroscience and Stem Cell Engineering, Wuhan University of Science and Technology, Wuhan, 430065, China.,College of Life Sciences and Health, Wuhan University of Science and Technology, Wuhan, 430065, China
| | - Chunxiu Xu
- Institute of Visual Neuroscience and Stem Cell Engineering, Wuhan University of Science and Technology, Wuhan, 430065, China.,College of Life Sciences and Health, Wuhan University of Science and Technology, Wuhan, 430065, China
| | - Xuefei Fu
- Institute of Visual Neuroscience and Stem Cell Engineering, Wuhan University of Science and Technology, Wuhan, 430065, China.,College of Life Sciences and Health, Wuhan University of Science and Technology, Wuhan, 430065, China
| | - Lin Yan
- Institute of Visual Neuroscience and Stem Cell Engineering, Wuhan University of Science and Technology, Wuhan, 430065, China.,College of Life Sciences and Health, Wuhan University of Science and Technology, Wuhan, 430065, China
| | - Yaqin Zhao
- Institute of Visual Neuroscience and Stem Cell Engineering, Wuhan University of Science and Technology, Wuhan, 430065, China.,College of Life Sciences and Health, Wuhan University of Science and Technology, Wuhan, 430065, China
| | - Kai Yao
- Institute of Visual Neuroscience and Stem Cell Engineering, Wuhan University of Science and Technology, Wuhan, 430065, China. .,College of Life Sciences and Health, Wuhan University of Science and Technology, Wuhan, 430065, China. .,Hubei Province Key Laboratory of Occupational Hazard Identification and Control, Wuhan University of Science and Technology, Wuhan, 430065, China.
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4
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Fan J, Liu J, Liu J, Angel PM, Drake RR, Wu Y, Fan H, Koutalos Y, Crosson CE. Sphingomyelinases in retinas and optic nerve heads: Effects of ocular hypertension and ischemia. Exp Eye Res 2022; 224:109250. [PMID: 36122624 PMCID: PMC10694736 DOI: 10.1016/j.exer.2022.109250] [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: 02/03/2022] [Revised: 08/12/2022] [Accepted: 09/12/2022] [Indexed: 11/28/2022]
Abstract
Sphingomyelinases (SMase), enzymes that catalyze the hydrolysis of sphingomyelin to ceramide, are important sensors for inflammatory cytokines and apoptotic signaling. Studies have provided evidence that increased SMase activity can contribute to retinal injury. In most tissues, two major SMases are responsible for stress-induced increases in ceramide: acid sphingomyelinase (ASMase) and Mg2+-dependent neutral sphingomyelinase (NSMase). The purposes of the current study were to determine the localization of SMases and their substrates in the retina and optic nerve head and to investigate the effects of ocular hypertension and ischemia on ASMase and NSMase activities. Tissue and cellular localization of ASMase and NSMase were determined by immunofluorescence imaging. Tissue localization of sphingomyelin in retinas was further determined by Matrix-Assisted Laser Desorption/Ionization mass spectrometry imaging. Tissue levels of sphingomyelins and ceramide were determined by liquid chromatography with tandem mass spectrometry. Sphingomyelinase activities under basal conditions and following acute ischemic and ocular hypotensive stress were measured using the Amplex Red Sphingomyelinase Assay Kit. Our data show that ASMase is in the optic nerve head and the retinal ganglion cell layer. NSMase is in the optic nerve head, photoreceptor and retinal ganglion cell layers. Both ASMase and NSMase were identified in human induced pluripotent stem cell-derived retinal ganglion cells and optic nerve head astrocytes. The retina and optic nerve head each exhibited unique distribution of sphingomyelins with the abundance of very long chain species being higher in the optic nerve head than in the retina. Basal activities for ASMase in retinas and optic nerve heads were 54.98 ± 2.5 and 95.6 ± 19.5 mU/mg protein, respectively. Ocular ischemia significantly increased ASMase activity to 86.2 ± 15.3 mU/mg protein in retinas (P = 0.03) but not in optic nerve heads (81.1 ± 15.3 mU/mg protein). Ocular hypertension significantly increased ASMase activity to 121.6 ± 7.3 mU/mg protein in retinas (P < 0.001) and 267.0 ± 66.3 mU/mg protein in optic nerve heads (P = 0.03). Basal activities for NSMase in retinas and optic nerve heads were 12.3 ± 2.1 and 37.9 ± 8.7 mU/mg protein, respectively. No significant change in NSMase activity was measured following ocular ischemia or hypertension. Our results provide evidence that both ASMase and NSMase are expressed in retinas and optic nerve heads; however, basal ASMase activity is significantly higher than NSMase activity in retinas and optic nerve heads. In addition, only ASMase activity was significantly increased in ocular ischemia or hypertension. These data support a role for ASMase-mediated sphingolipid metabolism in the development of retinal ischemic and hypertensive injuries.
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Affiliation(s)
- Jie Fan
- Storm Eye Institute, Medical University of South Carolina, Department of Ophthalmology, Charleston, SC, USA.
| | - Jian Liu
- Storm Eye Institute, Medical University of South Carolina, Department of Ophthalmology, Charleston, SC, USA
| | - Jiali Liu
- Shanghai Municipal Hospital of Traditional Chinese Medicine, Shanghai University of Traditional Chinese Medicine, Department of Ophthalmology, 274 Middle Zhijiang Road, Jingan District, Shanghai, 200071, China
| | - Peggi M Angel
- Department of Cell and Molecular Pharmacology and Experimental Therapeutics and MUSC Proteomics Center, Medical University of South Carolina, Charleston, SC, USA
| | - Richard R Drake
- Department of Cell and Molecular Pharmacology and Experimental Therapeutics and MUSC Proteomics Center, Medical University of South Carolina, Charleston, SC, USA
| | - Yan Wu
- Department of Pathology & Laboratory Medicine, Medical University of South Carolina, Charleston, SC, USA
| | - Hongkuan Fan
- Department of Pathology & Laboratory Medicine, Medical University of South Carolina, Charleston, SC, USA
| | - Yiannis Koutalos
- Storm Eye Institute, Medical University of South Carolina, Department of Ophthalmology, Charleston, SC, USA
| | - Craig E Crosson
- Storm Eye Institute, Medical University of South Carolina, Department of Ophthalmology, Charleston, SC, USA
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Activation of Frizzled-7 attenuates blood-brain barrier disruption through Dvl/β-catenin/WISP1 signaling pathway after intracerebral hemorrhage in mice. Fluids Barriers CNS 2021; 18:44. [PMID: 34565396 PMCID: PMC8474841 DOI: 10.1186/s12987-021-00278-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2021] [Accepted: 09/16/2021] [Indexed: 02/08/2023] Open
Abstract
BACKGROUND Destruction of blood-brain barrier (BBB) is one of the main mechanisms of secondary brain injury following intracerebral hemorrhage (ICH). Frizzled-7 is a key protein expressed on the surface of endothelial cells that controls vascular permeability through the Wnt-canonical pathway involving WNT1-inducible signaling pathway protein 1 (WISPI). This study aimed to investigate the role of Frizzled-7 signaling in BBB preservation after ICH in mice. METHODS Adult CD1 mice were subjected to sham surgery or collagenase-induced ICH. Frizzled-7 activation or knockdown was performed by administration of Clustered Regularly Interspaced Palindromic Repeats (CRISPR) by intracerebroventricular injection at 48 h before ICH induction. WISP1 activation or WISP1 knockdown was performed to evaluate the underlying signaling pathway. Post-ICH assessments included neurobehavior, brain edema, BBB permeability, hemoglobin level, western blot and immunofluorescence. RESULTS The brain expressions of Frizzled-7 and WISP1 significantly increased post-ICH. Frizzled-7 was expressed in endothelial cells, astrocytes, and neurons after ICH. Activation of Frizzled-7 significantly improved neurological function, reduced brain water content and attenuated BBB permeability to large molecular weight substances after ICH. Whereas, knockdown of Frizzled-7 worsened neurological function and brain edema after ICH. Activation of Frizzled-7 significantly increased the expressions of Dvl, β-Catenin, WISP1, VE-Cadherin, Claudin-5, ZO-1 and reduced the expression of phospho-β-Catenin. WISP1 knockdown abolished the effects of Frizzled-7 activation on the expressions of VE-Cadherin, Claudin-5 and ZO-1 at 24 h after ICH. CONCLUSIONS Frizzled-7 activation potentially attenuated BBB permeability and improved neurological deficits after ICH through Dvl/β-Catenin/WISP1 pathway. Frizzled-7 may be a potential target for the development of ICH therapeutic drugs.
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Cilenšek I, Lapuh V, Globočnik Petrovič M, Petrovič D. HDAC9 rs11984041 polymorphism is associated with diabetic retinopathy in Slovenian patients with type 2 diabetes mellitus. Gene 2021; 796-797:145802. [PMID: 34175397 DOI: 10.1016/j.gene.2021.145802] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2020] [Revised: 05/12/2021] [Accepted: 06/22/2021] [Indexed: 12/14/2022]
Abstract
AIM Histone deacetylase 9 (HDAC9) is an important regulator of transcription that has also been investigated as a candidate gene in some pathologies. Our aim was to investigate the association between rs2107595 and rs11984041 HDAC9 gene polymorphisms and diabetic retinopathy (DR) in Slovenian patients with type 2 diabetes mellitus (T2DM). We also investigated HDAC9 expression in the fibrovascular membranes (FVMs) of patients with proliferative DR (PDR). METHODS Our study involved 1290 unrelated Slovenian patients with T2DM: 542 of them with DR as the study group, and 748 without DR as the control group. The investigated polymorphisms were genotyped using KASPar genotyping assay. The expression of HDAC9 was examined by immunohistochemistry in human FVM from 25 patients with PDR. RESULTS The T allele and TT genotype frequencies of the rs11984041 polymorphism were significantly higher in the study group compared to the controls. The logistic regression analysis showed that the carriers of the TT genotype of this polymorphism have a 3.76-fold increase (95% CI 1.04-11.67) in the risk of developing DR. The T allele of rs11984041 was associated with increased HDAC9 expression in FVMs, obtained from T2DM patients with PDR. Patients with the T allele of rs11984041 compared to the homozygotes for the wild type C allele exhibited higher density of HDAC9-positive cells (35 ± 10/mm2 vs. 12 ± 6/mm2, respectively). CONCLUSIONS We observed a notable association between the TT genotype of rs11984041 and DR, indicating its possible role as a genetic risk factor for the development of this diabetic complication.
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Zaidi SAH, Thakore N, Singh S, Guzman W, Mehrotra S, Gangaraju V, Husain S. Histone Deacetylases Regulation by δ-Opioids in Human Optic Nerve Head Astrocytes. Invest Ophthalmol Vis Sci 2021; 61:17. [PMID: 32915982 PMCID: PMC7488628 DOI: 10.1167/iovs.61.11.17] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Purpose We determined whether δ-opioid receptor agonist (SNC-121) regulates acetylation homeostasis via controlling histone deacetylases (HDACs) activity and expression in optic nerve head (ONH) astrocytes. Methods ONH astrocytes were treated with SNC-121 (1 µM) for 24 hours. The HDAC activity was measured using HDAC-specific fluorophore-conjugated synthetic substrates, Boc-Lys(Ac)-AMC and (Boc-Lys(Tfa)-AMC). Protein and mRNA expression of each HDAC was determined by Western blotting and quantitative real-time PCR. IOP in rats was elevated by injecting 2.0 M hypertonic saline into the limbal veins. Results Delta opioid receptor agonist, SNC-121 (1 µM), treatment increased acetylation of histone H3, H2B, and H4 by 128 ± 3%, 45 ± 1%, and 68 ± 2%, respectively. The addition of Garcinol, a histone-acetyltransferase inhibitor, fully blocked SNC-121–induced histone H3 acetylation. SNC-121 reduced the activities of class I and IIb HDACs activities significantly (17 ± 3%) and this decrease in HDACs activities was fully blocked by a selective δ-opioid receptors antagonist, naltrindole. SNC-121 also decrease the mRNA expression of HDAC-3 and HDAC-6 by 19% and 18%, respectively. Furthermore, protein expression of HDAC 1, 2, 3, and 6 was significantly (P < 0.05) decreased by SNC-121 treatment. SNC-121 treatment also reduced lipopolysaccharide-induced TNF-α production from ONH astrocytes and glial fibrillary acidic protein immunostaining in the optic nerve of ocular hypertensive animals. Conclusions We provided evidence that δ-opioid receptor agonist activation increased histone acetylation, decrease HDACs class I and class IIb activities, mRNA, and protein expression, lipopolysaccharide-induced TNF-α production in ONH astrocytes. Our data also demonstrate that SNC-121 treatment decrease glial fibrillary acidic protein immunostaining in the optic nerves of animals with ocular hypertension.
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Affiliation(s)
- Syed A H Zaidi
- Hewitt Laboratory of the Ola B. Williams Glaucoma Centre, Department of Ophthalmology, Storm Eye Institute, Medical University of South Carolina, Charleston, South Carolina
| | - Nakul Thakore
- Hewitt Laboratory of the Ola B. Williams Glaucoma Centre, Department of Ophthalmology, Storm Eye Institute, Medical University of South Carolina, Charleston, South Carolina
| | - Sudha Singh
- Hewitt Laboratory of the Ola B. Williams Glaucoma Centre, Department of Ophthalmology, Storm Eye Institute, Medical University of South Carolina, Charleston, South Carolina
| | - Wendy Guzman
- Hewitt Laboratory of the Ola B. Williams Glaucoma Centre, Department of Ophthalmology, Storm Eye Institute, Medical University of South Carolina, Charleston, South Carolina
| | - Shikhar Mehrotra
- Department of Surgery, Hollings Cancer Center, Medical University of South Carolina, Charleston, South Carolina
| | - Vamsi Gangaraju
- Department of Biochemistry and Molecular Biology, Medical University of South Carolina, Charleston, South Carolina
| | - Shahid Husain
- Hewitt Laboratory of the Ola B. Williams Glaucoma Centre, Department of Ophthalmology, Storm Eye Institute, Medical University of South Carolina, Charleston, South Carolina
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Husain S, Zaidi SAH, Singh S, Guzman W, Mehrotra S. Reduction of Neuroinflammation by δ-Opioids Via STAT3-Dependent Pathway in Chronic Glaucoma Model. Front Pharmacol 2021; 12:601404. [PMID: 33628191 PMCID: PMC7898062 DOI: 10.3389/fphar.2021.601404] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2020] [Accepted: 01/05/2021] [Indexed: 12/25/2022] Open
Abstract
The main objective of this study was to determine the inhibition of pro-inflammatory cytokines and their associated signaling molecules by δ-opioid receptor activation by a selective ligand, SNC-121 in chronic rat glaucoma model. Intraocular pressure was raised in rat eyes by injecting 2 M hypertonic saline into the limbal veins. SNC-121 (1 mg/kg; i. p) or Stattic (5 mg/kg; i. p) was administered in Brown Norway rats daily for 7 days. The mRNA expression of IL-1β, TNF-α, Fas, IL-6, leukemia inhibitory factor, and IFN-γ was increased significantly in the retina of ocular hypertensive animals at day 7, post injury. Administration of SNC-121 (1 mg/kg; i. p. injection) for 7 days (once a day) completely inhibited the increase in the mRNA and protein expression of pro-inflammatory cytokines. Mechanistically, we provide data showing a significant increase in the phosphorylation of STAT3 at tyrosine 705 whereas a moderate but significant increase in the total STAT3 protein expression was also seen in the retina of ocular hypertensive animals. Data illustrated that SNC-121 administration completely abrogated ocular hypertension-induced increase in STAT3Y705 phosphorylation. Interestingly, acetylation of STAT3 at lysine 685 (AcK685) was reduced in ocular hypertensive animals and subsequently increased significantly by SNC-121 treatment. Stattic, a selective STAT3 inhibitor, administration resulted in a complete attenuation in the production of IL-1β and IL-6 in ocular hypertensive animals. In conclusion, δ-opioid receptor activation suppressed the phosphorylation of STAT3 at tyrosine 705 and increased acetylation at lysine 686 and these posttranslational modifications can regulate the production of some but not all pro-inflammatory cytokines in response to glaucomatous injury.
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Affiliation(s)
- Shahid Husain
- Department of Ophthalmology, Storm Eye Institute, Medical University of South Carolina, Charleston, SC, United States
| | - Syed A H Zaidi
- Department of Ophthalmology, Storm Eye Institute, Medical University of South Carolina, Charleston, SC, United States
| | - Sudha Singh
- Department of Ophthalmology, Storm Eye Institute, Medical University of South Carolina, Charleston, SC, United States
| | - Wendy Guzman
- Department of Ophthalmology, Storm Eye Institute, Medical University of South Carolina, Charleston, SC, United States
| | - Shikhar Mehrotra
- Department of Surgery, Hollings Cancer Center, Medical University of South Carolina, Charleston, SC, United States
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Schmitt HM, Grosser JA, Schlamp CL, Nickells RW. Targeting HDAC3 in the DBA/2J spontaneous mouse model of glaucoma. Exp Eye Res 2020; 200:108244. [PMID: 32971093 DOI: 10.1016/j.exer.2020.108244] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2020] [Revised: 08/21/2020] [Accepted: 09/10/2020] [Indexed: 01/12/2023]
Abstract
High intraocular pressure (IOP) is the most common risk factor associated with glaucoma in humans. While lowering IOP is effective at reducing the rate of retinal ganglion cell (RGC) loss, to date, no treatment exists to directly preserve these cells affected by damage to the optic nerve. Recently, histone deacetylase-3 (HDAC3) has become a potential therapeutic target because it plays an important role in the early nuclear atrophic events that precede RGC death. Conditional knockout or inhibition of HDAC3 prevents histone deacetylation, heterochromatin formation, apoptosis, and eventual RGC loss following acute optic nerve injury. Using these approaches to repress HDAC3 activity, we tested whether targeting HDAC3 protects RGCs from ganglion cell-specific BRN3A expression loss, total somatic cell loss, and optic nerve degeneration in the DBA/2J mouse model of spontaneous glaucoma. Targeted ablation of Hdac3 activity did not protect RGCs from axonal degeneration or somatic cell death in the DBA/2J mouse model of glaucoma. However, inhibition of HDAC3 activity using RGFP966 conferred mild protection against somatic cell loss in the ganglion cell layer in aged DBA/2J mice. Further experimentation is necessary to determine whether other class I HDACs may serve as potential therapeutic targets in chronic models of glaucoma.
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Affiliation(s)
- Heather M Schmitt
- Department of Ophthalmology and Visual Sciences, University of Wisconsin-Madison, Madison, WI, United States; Department of Ophthalmology, Duke University, Durham, NC, United States.
| | - Joshua A Grosser
- Department of Ophthalmology and Visual Sciences, University of Wisconsin-Madison, Madison, WI, United States
| | - Cassandra L Schlamp
- Department of Ophthalmology and Visual Sciences, University of Wisconsin-Madison, Madison, WI, United States; McPherson Eye Research Institute, University of Wisconsin-Madison, Madison, WI, United States
| | - Robert W Nickells
- Department of Ophthalmology and Visual Sciences, University of Wisconsin-Madison, Madison, WI, United States; McPherson Eye Research Institute, University of Wisconsin-Madison, Madison, WI, United States
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10
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Park JW, Sung MS, Ha JY, Guo Y, Piao H, Heo H, Park SW. Neuroprotective Effect of Brazilian Green Propolis on Retinal Ganglion Cells in Ischemic Mouse Retina. Curr Eye Res 2019; 45:955-964. [PMID: 31842625 DOI: 10.1080/02713683.2019.1705493] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
PURPOSE The current study was undertaken to investigate whether Brazilian green propolis (BGP) can increase the viability of retinal ganglion cells (RGCs) in ischemic mouse retina, and examined the possible mechanisms underlying this neuroprotection. MATERIALS AND METHODS C57BL/6J mice were subjected to constant elevation of intraocular pressure for 60 min to establish retinal ischemia-reperfusion injury. Mice then received saline or BGP (200 mg/kg) intraperitoneally once daily until sacrifice. The expression of hypoxia-inducing factor (HIF)-1α and glial fibrillary acidic protein (GFAP) and the level of histone acetylation were assessed at 1, 3, and 7 days after injury. The expression of Bax, Bcl-2, p53, NF-κB, Nrf2, and HO-1 were also analyzed at 3 days after injury. The neuroprotective effect of BGP treatment on RGC survival was evaluated using Brn3a immunohistochemical staining. RESULTS The expression of HIF-1α and GFAP was increased and the level of histone acetylation decreased in saline-treated ischemic retinas within 7 days. BGP treatment effectively attenuated the elevated expression of HIF-1α, GFAP, Bax, NF-κB and p53. The expression of Bcl-2, Nrf2, HO-1 and the level of histone acetylation increased by BGP treatment, resulting in a significant difference between BGP-treated and saline-treated retinas. Immunohistochemical staining for Brn3a also revealed that BGP treatment protected against RGC loss in ischemic retina. CONCLUSIONS Our results suggest that BGP has a neuroprotective effect on RGCs through the upregulation of histone acetylation, downregulation of apoptotic stimuli, and suppression of NF-κB mediated inflammatory pathway in ischemic retina. These findings suggest that BGP is a potential neuroprotective agent against RGC loss under oxidative stress.
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Affiliation(s)
| | - Mi Sun Sung
- Department of Ophthalmology and Research Institute of Medical Sciences, Chonnam National University Medical School and Hospital , Gwangju, South Korea
| | - Jun Young Ha
- Department of Ophthalmology and Research Institute of Medical Sciences, Chonnam National University Medical School and Hospital , Gwangju, South Korea
| | - Yue Guo
- Department of Ophthalmology and Research Institute of Medical Sciences, Chonnam National University Medical School and Hospital , Gwangju, South Korea
| | - Helong Piao
- Department of Ophthalmology and Research Institute of Medical Sciences, Chonnam National University Medical School and Hospital , Gwangju, South Korea
| | - Hwan Heo
- Department of Ophthalmology and Research Institute of Medical Sciences, Chonnam National University Medical School and Hospital , Gwangju, South Korea
| | - Sang Woo Park
- Department of Ophthalmology and Research Institute of Medical Sciences, Chonnam National University Medical School and Hospital , Gwangju, South Korea
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11
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Sung MS, Heo H, Eom GH, Kim SY, Piao H, Guo Y, Park SW. HDAC2 Regulates Glial Cell Activation in Ischemic Mouse Retina. Int J Mol Sci 2019; 20:ijms20205159. [PMID: 31627491 PMCID: PMC6829428 DOI: 10.3390/ijms20205159] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2019] [Revised: 10/10/2019] [Accepted: 10/16/2019] [Indexed: 11/29/2022] Open
Abstract
The current study was undertaken to investigate whether histone deacetylases (HDACs) can modulate the viability of retinal ganglion cells (RGCs) and the activity of glial cells in a mouse model of retinal ischemia-reperfusion (IR) injury. C57BL/6J mice were subjected to constant elevation of intraocular pressure for 60 min to induce retinal IR injury. Expression of macroglial and microglial cell markers (GFAP and Iba1), hypoxia inducing factor (HIF)-1α, and histone acetylation was analyzed after IR injury. To investigate the role of HDACs in the activation of glial cells, overexpression of HDAC1 and HDAC2 isoforms was performed. To determine the effect of HDAC inhibition on RGC survival, trichostatin-A (TSA, 2.5 mg/kg) was injected intraperitoneally. After IR injury, retinal GFAP, Iba1, and HIF-1α were upregulated. Conversely, retinal histone acetylation was downregulated. Notably, adenoviral-induced overexpression of HDAC2 enhanced glial activation following IR injury, whereas overexpression of HDAC1 did not significantly affect glial activation. TSA treatment significantly increased RGC survival after IR injury. Our results suggest that increased activity of HDAC2 is closely related to glial activation in a mouse model of retinal IR injury and inhibition of HDACs by TSA showed neuroprotective potential in retinas with IR injuries.
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Affiliation(s)
- Mi Sun Sung
- Department of Ophthalmology, Chonnam National University Medical School and Hospital, Gwangju 61469, Korea.
| | - Hwan Heo
- Department of Ophthalmology, Chonnam National University Medical School and Hospital, Gwangju 61469, Korea.
| | - Gwang Hyeon Eom
- Department of Pharmacology, Chonnam National University Medical School, Hwasungun 58128, Korea.
| | - So Young Kim
- Department of Ophthalmology, Chonnam National University Medical School and Hospital, Gwangju 61469, Korea.
| | - Helong Piao
- Department of Ophthalmology, Chonnam National University Medical School and Hospital, Gwangju 61469, Korea.
| | - Yue Guo
- Department of Ophthalmology, Chonnam National University Medical School and Hospital, Gwangju 61469, Korea.
| | - Sang Woo Park
- Department of Ophthalmology, Chonnam National University Medical School and Hospital, Gwangju 61469, Korea.
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12
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Tajima T, Yoshifuji A, Matsui A, Itoh T, Uchiyama K, Kanda T, Tokuyama H, Wakino S, Itoh H. β-hydroxybutyrate attenuates renal ischemia-reperfusion injury through its anti-pyroptotic effects. Kidney Int 2019; 95:1120-1137. [PMID: 30826015 DOI: 10.1016/j.kint.2018.11.034] [Citation(s) in RCA: 99] [Impact Index Per Article: 19.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2018] [Revised: 11/16/2018] [Accepted: 11/21/2018] [Indexed: 01/05/2023]
Abstract
Ketone bodies including β-hydroxybutyrate (β-OHB) have been shown to protect against ischemic tissue injury when present at low concentrations. We evaluated the impact of β-OHB on renal ischemia/reperfusion injury (IRI). Mice were treated with a continuous infusion of β-OHB using an osmotic mini-pump before and after IRI. We also tested the effects of increasing endogenous serum β-OHB levels by fasting. Renal IRI was attenuated by β-OHB treatment compared to saline control, with similar results in the fasting condition. β-OHB treatment reduced the number of terminal deoxynucleotidyl transferase-mediated dUTP nick end-labeling (TUNEL)-positive cells and increased expression of forkhead transcription factor O3 (FOXO3), an upstream regulator of pyroptosis. Although β-OHB treatment did not impact markers of apoptosis, it decreased the expression of caspase-1 and proinflammatory cytokines, indicating that β-OHB blocked pyroptosis. In a human proximal tubular cell line exposed to hypoxia and reoxygenation, β-OHB reduced cell death in a FOXO3-dependent fashion. Histone acetylation was decreased in kidneys exposed to IRI and in proximal tubular cells exposed to hypoxia and reoxygenation, and this effect was ameliorated by β-OHB through the inactivation of histone deacetylases. In vitro, β-OHB treatment restored histone acetylation at the FOXO3 promoter. Consistent with epigenetic molecular effects, the renoprotective effects of β-OHB were still observed when the continuous infusion was stopped at the time of IRI. Thus, β-OHB attenuates renal IRI through anti-pyroptotic effects, likely mediated by an epigenetic effect on FOXO3 expression.
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Affiliation(s)
- Takaya Tajima
- Department of Internal Medicine, School of Medicine, Keio University, Tokyo, Japan
| | - Ayumi Yoshifuji
- Department of Internal Medicine, School of Medicine, Keio University, Tokyo, Japan
| | - Ayumi Matsui
- Department of Internal Medicine, School of Medicine, Keio University, Tokyo, Japan
| | - Tomoaki Itoh
- Department of Internal Medicine, School of Medicine, Keio University, Tokyo, Japan
| | - Kiyotaka Uchiyama
- Department of Internal Medicine, School of Medicine, Keio University, Tokyo, Japan
| | - Takeshi Kanda
- Department of Internal Medicine, School of Medicine, Keio University, Tokyo, Japan
| | - Hirobumi Tokuyama
- Department of Internal Medicine, School of Medicine, Keio University, Tokyo, Japan
| | - Shu Wakino
- Department of Internal Medicine, School of Medicine, Keio University, Tokyo, Japan.
| | - Hiroshi Itoh
- Department of Internal Medicine, School of Medicine, Keio University, Tokyo, Japan
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13
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Dahbash M, Sella R, Megiddo-Barnir E, Nisgav Y, Tarasenko N, Weinberger D, Rephaeli A, Livnat T. The Histone Deacetylase Inhibitor AN7, Attenuates Choroidal Neovascularization in a Mouse Model. Int J Mol Sci 2019; 20:ijms20030714. [PMID: 30736437 PMCID: PMC6387404 DOI: 10.3390/ijms20030714] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2019] [Accepted: 02/04/2019] [Indexed: 12/17/2022] Open
Abstract
: Choroidal neovascularization (CNV) is a complication of age-related macular degeneration and a major contributing factor to vision loss. In this paper, we show that in a mouse model of laser-induced CNV, systemic administration of Butyroyloxymethyl-diethyl phosphate (AN7), a histone deacetylase inhibitor (HDACi), significantly reduced CNV area and vascular leakage, as measured by choroidal flatmounts and fluorescein angiography. CNV area reduction by systemic AN7 treatment was similar to that achieved by intravitreal bevacizumab treatment. The expression of vascular endothelial growth factor (VEGF), fibroblast growth factor (FGF-2), and the endothelial cells marker CD31, was lower in the AN7 treated group in comparison to the control group at the laser lesion site. In vitro, AN7 facilitated retinal pigmented epithelium (RPE) cells tight junctions' integrity during hypoxia, by protecting the hexagonal pattern of ZO-1 protein in the cell borders, hence reducing RPE permeability. In conclusion, systemic AN7 should be further investigated as a possible effective treatment for CNV.
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Affiliation(s)
- Mor Dahbash
- Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv 69978, Israel.
- Laboratory of Eye Research, Felsenstein Medical Research Center, Petach Tikva 49100, Israel.
| | - Ruti Sella
- Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv 69978, Israel.
- Department of Ophthalmology, Rabin Medical Center, Petach Tikva 49100, Israel.
| | | | - Yael Nisgav
- Laboratory of Eye Research, Felsenstein Medical Research Center, Petach Tikva 49100, Israel.
| | - Nataly Tarasenko
- Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv 69978, Israel.
- Laboratory of Experimental Pharmacology and Oncology, Felsenstein Medical Research Center, Petach Tikva 49100, Israel.
| | - Dov Weinberger
- Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv 69978, Israel.
- Laboratory of Eye Research, Felsenstein Medical Research Center, Petach Tikva 49100, Israel.
- Department of Ophthalmology, Rabin Medical Center, Petach Tikva 49100, Israel.
| | - Ada Rephaeli
- Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv 69978, Israel.
- Laboratory of Experimental Pharmacology and Oncology, Felsenstein Medical Research Center, Petach Tikva 49100, Israel.
| | - Tami Livnat
- Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv 69978, Israel.
- Laboratory of Eye Research, Felsenstein Medical Research Center, Petach Tikva 49100, Israel.
- National Hemophilia Center, Institute of Thrombosis, and the Amalia Biron Research Institute of Thrombosis and Hemostasis, Sheba Medical Center, Tel Hashomer 52621, Israel.
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14
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Hyndman KA, Yang CR, Jung HJ, Umejiego EN, Chou CL, Knepper MA. Proteomic determination of the lysine acetylome and phosphoproteome in the rat native inner medullary collecting duct. Physiol Genomics 2018; 50:669-679. [PMID: 29932826 DOI: 10.1152/physiolgenomics.00029.2018] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
Phosphorylation and lysine (K)-acetylation are dynamic posttranslational modifications of proteins. Previous proteomic studies have identified over 170,000 phosphorylation sites and 15,000 K-acetylation sites in mammals. We recently reported that the inner medullary collecting duct (IMCD), which functions in the regulation of water-reabsorption, via the actions of vasopressin, expresses many of the enzymes that can modulated K-acetylation. The purpose of this study was to determine the K-acetylated or phosphorylated proteins expressed in IMCD cells. Second we questioned whether vasopressin V2 receptor activation significantly affects the IMCD acetylome or phosphoproteome? K-acetylated or serine-, threonine-, or tyrosine-phosphorylated peptides were identified from native rat IMCDs by proteomic analysis with four different enzymes (trypsin, chymotrypsin, ASP-N, or Glu-C) to generate a high-resolution proteome. K-acetylation was identified in 431 unique proteins, and 64% of the K-acetylated sites were novel. The acetylated proteins were expressed in all compartments of the cell and were enriched in pathways including glycolysis and vasopressin-regulated water reabsorption. In the vasopressin-regulated water reabsorption pathway, eight proteins were acetylated, including the novel identification of the basolateral water channel, AQP3, acetylated at K282; 215 proteins were phosphorylated in this IMCD cohort, including AQP2 peptides that were phosphorylated at four serines: 256, 261, 264, and 269. Acute dDAVP did not significantly affect the IMCD acetylome; however, it did significantly affect previously known vasopressin-regulated phosphorylation sites. In conclusion, presence of K-acetylated proteins involved in metabolism, ion, and water transport in the IMCD points to multiple roles of K-acetylation beyond its canonical role in transcriptional regulation.
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Affiliation(s)
- Kelly A Hyndman
- Cardio-Renal Physiology and Medicine, Division of Nephrology, Department of Medicine, University of Alabama at Birmingham , Birmingham, Alabama
| | - Chin-Rang Yang
- Epithelial Systems Biology Laboratory, Systems Biology Center, National Heart, Lung, and Blood Institute, National Institutes of Health , Bethesda, Maryland
| | - Hyun Jun Jung
- Epithelial Systems Biology Laboratory, Systems Biology Center, National Heart, Lung, and Blood Institute, National Institutes of Health , Bethesda, Maryland
| | - Ezigbobiara N Umejiego
- Epithelial Systems Biology Laboratory, Systems Biology Center, National Heart, Lung, and Blood Institute, National Institutes of Health , Bethesda, Maryland
| | - Chung-Ling Chou
- Epithelial Systems Biology Laboratory, Systems Biology Center, National Heart, Lung, and Blood Institute, National Institutes of Health , Bethesda, Maryland
| | - Mark A Knepper
- Epithelial Systems Biology Laboratory, Systems Biology Center, National Heart, Lung, and Blood Institute, National Institutes of Health , Bethesda, Maryland
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15
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Trifunović D, Arango-Gonzalez B, Comitato A, Barth M, Del Amo EM, Kulkarni M, Sahaboglu A, Hauck SM, Urtti A, Arsenijevic Y, Ueffing M, Marigo V, Paquet-Durand F. HDAC inhibition in the cpfl1 mouse protects degenerating cone photoreceptors in vivo. Hum Mol Genet 2018; 25:4462-4472. [PMID: 28172811 DOI: 10.1093/hmg/ddw275] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2016] [Revised: 08/05/2016] [Accepted: 08/11/2016] [Indexed: 12/21/2022] Open
Abstract
Cone photoreceptor cell death as it occurs in certain hereditary retinal diseases is devastating, with the affected patients suffering from a loss of accurate and colour vision. Regrettably, these hereditary cone diseases are still untreatable to date. Thus, the identification of substances able to block or restrain cone cell death is of primary importance. We studied the neuroprotective effects of a histone deacetylase inhibitor, Trichostatin A (TSA), in a mouse model of inherited, primary cone degeneration (cpfl1). We show that HDAC inhibition protects cpfl1 cones in vitro, in retinal explant cultures. More importantly, in vivo, a single intravitreal TSA injection significantly increased cone survival for up to 16 days post-injection. In addition, the abnormal, incomplete cone migration pattern in the cpfl1 retina was significantly improved by HDAC inhibition. These findings suggest a crucial role for HDAC activity in primary cone degeneration and highlight a new avenue for future therapy developments for cone dystrophies and retinal diseases associated with impaired cone migration.
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Affiliation(s)
- Dragana Trifunović
- Institute for Ophthalmic Research, University of Tuebingen, Tuebingen, Germany
| | | | - Antonella Comitato
- Department of Life Sciences, University of Modena and Reggio Emilia, Modena, Italy
| | - Melanie Barth
- Institute for Ophthalmic Research, University of Tuebingen, Tuebingen, Germany
| | - Eva M Del Amo
- School of Pharmacy, University of Eastern Finland, Kuopio, Finland
| | - Manoj Kulkarni
- Institute for Ophthalmic Research, University of Tuebingen, Tuebingen, Germany
| | - Ayse Sahaboglu
- Institute for Ophthalmic Research, University of Tuebingen, Tuebingen, Germany
| | - Stefanie M Hauck
- Research Unit Protein Science, Helmholtz Center Munich, Neuherberg, Germany
| | - Arto Urtti
- School of Pharmacy, University of Eastern Finland, Kuopio, Finland.,Centre for Drug Research, Division of Pharmaceutical Bioscience, University of Helsinki, Helsinki, Finland
| | - Yvan Arsenijevic
- Unit of Gene Therapy & Stem Cell Biology, Hôpital Ophtalmique Jules Gonin, University of Lausanne, Lausanne, Switzerland
| | - Marius Ueffing
- Institute for Ophthalmic Research, University of Tuebingen, Tuebingen, Germany
| | - Valeria Marigo
- Department of Life Sciences, University of Modena and Reggio Emilia, Modena, Italy
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16
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Wright LH, Herr DJ, Brown SS, Kasiganesan H, Menick DR. Angiokine Wisp-1 is increased in myocardial infarction and regulates cardiac endothelial signaling. JCI Insight 2018; 3:95824. [PMID: 29467324 DOI: 10.1172/jci.insight.95824] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2017] [Accepted: 01/10/2018] [Indexed: 12/17/2022] Open
Abstract
Myocardial infarctions (MIs) cause the loss of myocytes due to lack of sufficient oxygenation and latent revascularization. Although the administration of histone deacetylase (HDAC) inhibitors reduces the size of infarctions and improves cardiac physiology in small-animal models of MI injury, the cellular targets of the HDACs, which the drugs inhibit, are largely unspecified. Here, we show that WNT-inducible secreted protein-1 (Wisp-1), a matricellular protein that promotes angiogenesis in cancers as well as cell survival in isolated cardiac myocytes and neurons, is a target of HDACs. Further, Wisp-1 transcription is regulated by HDACs and can be modified by the HDAC inhibitor, suberanilohydroxamic acid (SAHA/vorinostat), after MI injury. We observe that, at 7 days after MI, Wisp-1 is elevated 3-fold greater in the border zone of infarction in mice that experience an MI injury and are injected daily with SAHA, relative to MI alone. Additionally, human coronary artery endothelial cells (HCAECs) produce WISP-1 and are responsive to autocrine WISP-1-mediated signaling, which functionally promotes their proangiogenic behavior. Altering endogenous expression of WISP-1 in HCAECs directly impacts their network density in vitro. Therapeutic interventions after a heart attack define the extent of infarct injury, cell survival, and overall prognosis. Our studies shown here identify a potentially novel cardiac angiokine, Wisp-1, that may contribute to beneficial post-MI treatment modalities.
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Affiliation(s)
| | | | - Symone S Brown
- College of Graduate Studies, Summer Undergraduate Research Program, Medical University of South Carolina, Charleston, South Carolina, USA
| | | | - Donald R Menick
- Division of Cardiology, and.,Ralph H. Johnson VA Medical Center, Charleston, South Carolina, USA
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17
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Por ED, Greene WA, Burke TA, Wang HC. Trichostatin A Inhibits Retinal Pigmented Epithelium Activation in an In Vitro Model of Proliferative Vitreoretinopathy. J Ocul Pharmacol Ther 2016; 32:415-24. [PMID: 27494828 PMCID: PMC5011631 DOI: 10.1089/jop.2016.0038] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Purpose: Proliferative vitreoretinopathy (PVR) is a blinding disorder that develops after a retinal tear or detachment. Activation of the retinal pigmented epithelium (RPE) is implicated in PVR; however, the mechanisms leading to enhanced RPE proliferation, migration, and contraction remain largely unknown. This study utilized an in vitro model of PVR to investigate the role of acetylation in RPE activation and its contribution to the progression of this disease. Methods: ARPE-19 cells, primary cultures of porcine RPE, and induced pluripotent stem cell-derived RPE (iPS-RPE) were utilized for cellular and molecular analyses. Cells treated with transforming growth factor beta 2 (TGFβ2; 10 ng/mL) alone or in the presence of the broad-spectrum histone deacetylase (HDAC) inhibitor, trichostatin A (TSA; 0.1 μM), were assessed for contraction and migration through collagen contraction and scratch assays, respectively. Western blotting and immunofluorescence analysis were performed to assess α-smooth muscle actin (α-SMA) and β-catenin expression after TGFβ2 treatment alone or in combination with TSA. Results: TGFβ2 significantly increased RPE cell contraction in collagen matrix and this effect was inhibited in the presence of TSA (0.1 μM). In agreement with these data, immunofluorescence analysis of TSA-treated iPS-RPE wounded monolayers revealed decreased α-SMA as compared with control. Scratch assays to assess wound healing revealed TSA inhibited TGFβ2-mediated iPS-RPE cell migration. Conclusions: Our findings indicate a role of acetylation in RPE activation. Specifically, the HDAC inhibitor TSA decreased RPE cell proliferation and TGFβ2-mediated cell contraction and migration. Further investigation of pharmacological compounds that modulate acetylation may hold promise as therapeutic agents for PVR.
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Affiliation(s)
- Elaine D Por
- Ocular Trauma, U.S. Army Institute of Surgical Research , JBSA-Fort Sam Houston, Texas
| | - Whitney A Greene
- Ocular Trauma, U.S. Army Institute of Surgical Research , JBSA-Fort Sam Houston, Texas
| | - Teresa A Burke
- Ocular Trauma, U.S. Army Institute of Surgical Research , JBSA-Fort Sam Houston, Texas
| | - Heuy-Ching Wang
- Ocular Trauma, U.S. Army Institute of Surgical Research , JBSA-Fort Sam Houston, Texas
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18
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Fan J, Alsarraf O, Chou CJ, Yates PW, Goodwin NC, Rice DS, Crosson CE. Ischemic preconditioning, retinal neuroprotection and histone deacetylase activities. Exp Eye Res 2016; 146:269-275. [PMID: 27060376 DOI: 10.1016/j.exer.2016.03.026] [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: 11/03/2015] [Revised: 03/07/2016] [Accepted: 03/31/2016] [Indexed: 01/05/2023]
Abstract
Increased histone deacetylase (HDAC) activity and the resulting dysregulation of protein acetylation is an integral event in retinal degenerations associated with ischemia and ocular hypertension. This study investigates the role of preconditioning on the process of acetylation in ischemic retinal injury. Rat eyes were unilaterally subjected to retinal injury by 45 min of acute ischemia, and retinal neuroprotection induced by 5 min of an ischemic preconditioning (IPC) event. HDAC activity was evaluated by a fluorometric enzymatic assay with selective isoform inhibitors. Retinal localization of acetylated histone-H3 was determined by immunohistochemistry on retina cross sections. Cleaved caspase-3 level was evaluated by Western blots. Electroretinogram (ERG) analyses were used to assess differences in retinal function seven days following ischemic injury. In control eyes, analysis of HDAC isoforms demonstrated that HDAC1/2 accounted for 28.4 ± 1.6%, HDAC3 for 42.4 ± 1.5% and HDAC6 activity 27.3 ± 3.5% of total activity. Following ischemia, total Class-I HDAC activity increased by 21.2 ± 6.2%, and this increase resulted solely from a rise in HDAC1/2 activity. No change in HDAC3 activity was measured. Activity of Class-II HDACs and HDAC8 was negligible. IPC stimulus prior to ischemic injury also suppressed the rise in Class-I HDAC activity, cleaved caspase-3 levels, and increased acetylated histone-H3 in the retina. In control animals 7 days post ischemia, ERG a- and b-wave amplitudes were significantly reduced by 34.9 ± 3.1% and 42.4 ± 6.3%, respectively. In rats receiving an IPC stimulus, the ischemia-induced decline in ERG a- and b-wave amplitudes was blocked. Although multiple HDACs were detected in the retina, these studies provide evidence that hypoacetylation associated with ischemic injury results from the selective rise in HDAC1/2 activity and that neuroprotection induced by IPC is mediated in part by suppressing HDAC activity.
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Affiliation(s)
- Jie Fan
- 167 Ashley Avenue, Storm Eye Institute, Department of Ophthalmology, Medical University of South Carolina, Charleston, SC, 29425, USA.
| | - Oday Alsarraf
- 167 Ashley Avenue, Storm Eye Institute, Department of Ophthalmology, Medical University of South Carolina, Charleston, SC, 29425, USA
| | - C James Chou
- 167 Ashley Avenue, Storm Eye Institute, Department of Ophthalmology, Medical University of South Carolina, Charleston, SC, 29425, USA
| | - Phillip W Yates
- 167 Ashley Avenue, Storm Eye Institute, Department of Ophthalmology, Medical University of South Carolina, Charleston, SC, 29425, USA
| | | | - Dennis S Rice
- Lexicon Pharmaceuticals, The Woodlands, TX, 77381, USA
| | - Craig E Crosson
- 167 Ashley Avenue, Storm Eye Institute, Department of Ophthalmology, Medical University of South Carolina, Charleston, SC, 29425, USA
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19
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Berner AK, Kleinman ME. Therapeutic Approaches to Histone Reprogramming in Retinal Degeneration. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2016; 854:39-44. [PMID: 26427391 PMCID: PMC4988123 DOI: 10.1007/978-3-319-17121-0_6] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Recent data have revealed epigenetic derangements and subsequent chromatin remodeling as a potent biologic switch for chronic inflammation and cell survival which are important therapeutic targets in the pathogenesis of several retinal degenerations. Histone deacetylases (HDACs) are a major component of this system and serve as a unique control of the chromatin remodeling process. With a multitude of targeted HDAC inhibitors now available, their use in both basic science and clinical studies has widened substantially. In the field of ocular biology, there are data to suggest that HDAC inhibition may suppress neovascularization and may be a possible treatment for retinitis pigmentosa and dry age-related macular degeneration (AMD). However, the effects of these inhibitors on cell survival and chemokine expression in the chorioretinal tissues remain very unclear. Here, we review the multifaceted biology of HDAC activity and pharmacologic inhibition while offering further insight into the importance of this epigenetic pathway in retinal degenerations. Our laboratory investigations aim to open translational avenues to advance dry AMD therapeutics while exploring the role of acetylation on inflammatory gene expression in the aging and degenerating retina.
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Affiliation(s)
- Andre K Berner
- , 740 S. Limestone St., Suite E-300, 40536, Lexington, KY, USA.
| | - Mark E Kleinman
- Department of Ophthalmology and Visual Sciences, University of Kentucky, 40536, Lexington, KY, USA.
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20
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Yang C, Liu J, Li L, Hu M, Long Y, Liu X, Zhu T, Huang X, Zhao S, Liu S, Rong R. Proteome Analysis of Renoprotection Mediated by a Novel Cyclic Helix B Peptide in Acute Kidney Injury. Sci Rep 2015; 5:18045. [PMID: 26655840 PMCID: PMC4674932 DOI: 10.1038/srep18045] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2015] [Accepted: 11/11/2015] [Indexed: 01/18/2023] Open
Abstract
We developed a novel, erythropoietin-derived, non-erythropoiesis, cyclic helix B peptide (CHBP) that displays potent renoprotection against acute kidney injury (AKI). To determine the mechanism of CHBP-mediated protection, we investigated the proteomic profile of mice treated with CHBP in a kidney ischemia-reperfusion (IR) injury model. The isobaric tags for relative and absolute quantitation (iTRAQ)-labeled samples were analyzed using a QSTAR XL LC/MS system. In total, 38 differentially expressed proteins (DEPs) were shared by all experimental groups, while 3 DEPs were detected specifically in the IR + CHBP group. Eight significant pathways were identified, and oxidative phosphorylation was shown to be the most important pathway in CHBP-mediated renoprotection. The significant DEPs in the oxidative phosphorylation pathway elicited by CHBP are NADH-ubiquinone oxidoreductase Fe-S protein 6 (NDUFS6), alpha-aminoadipic semialdehyde synthase (AASS) and ATP-binding cassette sub-family D member 3 (ABCD3). The DEPs mentioned above were verified by RT-qPCR and immunostaining in mouse kidneys. We tested 6 DEPs in human biopsy samples from kidney transplant recipients. The trend of differential expression was consistent with that in the murine model. In conclusion, this study helps to elucidate the pharmacological mechanisms of CHBP before clinical translation.
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Affiliation(s)
- Cheng Yang
- Department of Urology, Zhongshan Hospital, Fudan University, Shanghai, 200032, China.,Shanghai Key Laboratory of Organ Transplantation, Shanghai, 200032, China.,Department of Plastic Surgery, Zhongshan Hospital, Fudan University, Shanghai, 200032, China
| | - Junjun Liu
- Department of Stomatology, Huashan Hospital, Fudan University, Shanghai, 200040, China
| | - Long Li
- Shanghai Key Laboratory of Organ Transplantation, Shanghai, 200032, China
| | - Meiyu Hu
- Shanghai Key Laboratory of Organ Transplantation, Shanghai, 200032, China.,Biomedical Research Center, Zhongshan Hospital, Fudan University, Shanghai, 200032, China
| | - Yaqiu Long
- CAS Key Laboratory of Receptor Research, Shanghai Institute of Material Medical, Chinese Academy of Sciences, Shanghai, 200032, China
| | - Xiaohui Liu
- Department of Chemistry /Institutes of Biomedical Science, Fudan University, Shanghai, 200433, China
| | - Tongyu Zhu
- Department of Urology, Zhongshan Hospital, Fudan University, Shanghai, 200032, China.,Shanghai Key Laboratory of Organ Transplantation, Shanghai, 200032, China
| | - Xiao Huang
- Translational Center for Stem Cell Research, Tongji Hospital, Tongji University School of Medicine, Shanghai, 200065, China
| | - Shouliang Zhao
- Department of Stomatology, Huashan Hospital, Fudan University, Shanghai, 200040, China
| | - Shangfeng Liu
- Department of Stomatology, Huashan Hospital, Fudan University, Shanghai, 200040, China
| | - Ruiming Rong
- Department of Urology, Zhongshan Hospital, Fudan University, Shanghai, 200032, China.,Shanghai Key Laboratory of Organ Transplantation, Shanghai, 200032, China.,Department of Transfusion, Zhongshan Hospital, Fudan University, Shanghai, 200032, China
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Singh R, Kuai D, Guziewicz KE, Meyer J, Wilson M, Lu J, Smith M, Clark E, Verhoeven A, Aguirre GD, Gamm DM. Pharmacological Modulation of Photoreceptor Outer Segment Degradation in a Human iPS Cell Model of Inherited Macular Degeneration. Mol Ther 2015; 23:1700-1711. [PMID: 26300224 DOI: 10.1038/mt.2015.141] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2015] [Accepted: 07/23/2015] [Indexed: 12/16/2022] Open
Abstract
Degradation of photoreceptor outer segments (POS) by retinal pigment epithelium (RPE) is essential for vision, and studies have implicated altered POS processing in the pathogenesis of some retinal degenerative diseases. Consistent with this concept, a recently established hiPSC-RPE model of inherited macular degeneration, Best disease (BD), displayed reduced rates of POS breakdown. Herein we utilized this model to determine (i) if disturbances in protein degradation pathways are associated with delayed POS digestion and (ii) whether such defect(s) can be pharmacologically targeted. We found that BD hiPSC-RPE cultures possessed increased protein oxidation, decreased free-ubiquitin levels, and altered rates of exosome secretion, consistent with altered POS processing. Application of valproic acid (VPA) with or without rapamycin increased rates of POS degradation in our model, whereas application of bafilomycin-A1 decreased such rates. Importantly, the negative effect of bafilomycin-A1 could be fully reversed by VPA. The utility of hiPSC-RPE for VPA testing was further evident following examination of its efficacy and metabolism in a complementary canine disease model. Our findings suggest that disturbances in protein degradation pathways contribute to the POS processing defect observed in BD hiPSC-RPE, which can be manipulated pharmacologically. These results have therapeutic implications for BD and perhaps other maculopathies.
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Affiliation(s)
- Ruchira Singh
- Waisman Center, University of Wisconsin-Madison, Madison, Wisconsin, USA; McPherson Eye Research Institute, University of Wisconsin, Madison, Wisconsin, USA
| | - David Kuai
- Waisman Center, University of Wisconsin-Madison, Madison, Wisconsin, USA
| | - Karina E Guziewicz
- Department of Clinical Studies-Philadelphia, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Jackelyn Meyer
- Waisman Center, University of Wisconsin-Madison, Madison, Wisconsin, USA
| | - Molly Wilson
- Waisman Center, University of Wisconsin-Madison, Madison, Wisconsin, USA
| | - Jianfeng Lu
- Waisman Center, University of Wisconsin-Madison, Madison, Wisconsin, USA
| | - Molly Smith
- Waisman Center, University of Wisconsin-Madison, Madison, Wisconsin, USA
| | - Eric Clark
- Waisman Center, University of Wisconsin-Madison, Madison, Wisconsin, USA
| | - Amelia Verhoeven
- Waisman Center, University of Wisconsin-Madison, Madison, Wisconsin, USA
| | - Gustavo D Aguirre
- Department of Clinical Studies-Philadelphia, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - David M Gamm
- Waisman Center, University of Wisconsin-Madison, Madison, Wisconsin, USA; McPherson Eye Research Institute, University of Wisconsin, Madison, Wisconsin, USA; Department of Ophthalmology and Visual Sciences, University of Wisconsin, Madison, Wisconsin, USA.
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Aune SE, Herr DJ, Kutz CJ, Menick DR. Histone Deacetylases Exert Class-Specific Roles in Conditioning the Brain and Heart Against Acute Ischemic Injury. Front Neurol 2015; 6:145. [PMID: 26175715 PMCID: PMC4485035 DOI: 10.3389/fneur.2015.00145] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2015] [Accepted: 06/15/2015] [Indexed: 12/12/2022] Open
Abstract
Ischemia-reperfusion (IR) injury comprises a significant portion of morbidity and mortality from heart and brain diseases worldwide. This enduring clinical problem has inspired myriad reports in the scientific literature of experimental interventions seeking to elucidate the pathology of IR injury. Elective cardiac surgery presents perhaps the most viable scenario for protecting the heart and brain from IR injury due to the opportunity to condition the organs prior to insult. The physiological parameters for the preconditioning of vital organs prior to insult through mechanical and pharmacological maneuvers have been heavily examined. These investigations have revealed new insights into how preconditioning alters cellular responses to IR injury. However, the promise of preconditioning remains unfulfilled at the clinical level, and research seeking to implicate cell signals essential to this protection continues. Recent discoveries in molecular biology have revealed that gene expression can be controlled through posttranslational modifications, without altering the chemical structure of the genetic code. In this scenario, gene expression is repressed by enzymes that cause chromatin compaction through catalytic removal of acetyl moieties from lysine residues on histones. These enzymes, called histone deacetylases (HDACs), can be inhibited pharmacologically, leading to the de-repression of protective genes. The discovery that HDACs can also alter the function of non-histone proteins through posttranslational deacetylation has expanded the potential impact of HDAC inhibitors for the treatment of human disease. HDAC inhibitors have been applied in a very small number of experimental models of IR. However, the scientific literature contains an increasing number of reports demonstrating that HDACs converge on preconditioning signals in the cell. This review will describe the influence of HDACs on major preconditioning signaling pathways in the heart and brain.
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Affiliation(s)
- Sverre E Aune
- Gazes Cardiac Research Institute, Medical University of South Carolina , Charleston, SC , USA
| | - Daniel J Herr
- Gazes Cardiac Research Institute, Medical University of South Carolina , Charleston, SC , USA
| | - Craig J Kutz
- Gazes Cardiac Research Institute, Medical University of South Carolina , Charleston, SC , USA
| | - Donald R Menick
- Gazes Cardiac Research Institute, Medical University of South Carolina , Charleston, SC , USA
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Alsarraf O, Fan J, Dahrouj M, Chou CJ, Yates PW, Crosson CE. Acetylation preserves retinal ganglion cell structure and function in a chronic model of ocular hypertension. Invest Ophthalmol Vis Sci 2014; 55:7486-93. [PMID: 25358731 DOI: 10.1167/iovs.14-14792] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
PURPOSE The current studies investigate if the histone deacetylase (HDAC) inhibitor, valproic acid (VPA), can limit retinal ganglion cell (RGC) degeneration in an ocular-hypertensive rat model. METHODS Intraocular pressure (IOP) was elevated unilaterally in Brown Norway rats by hypertonic saline injection. Rats received either vehicle or VPA (100 mg/kg) treatment for 28 days. Retinal ganglion cell function and number were assessed by pattern electroretinogram (pERG) and retrograde FluoroGold labeling. Western blotting and a fluorescence assay were used for determination of histone H3 acetylation and HDAC activity, respectively, at 3-day, 1-week, and 2-week time points. RESULTS Hypertonic saline injections increased IOPs by 7 to 14 mm Hg. In vehicle-treated animals, ocular hypertension resulted in a 29.1% and 39.4% decrease in pERG amplitudes at 2 and 4 weeks, respectively, and a 42.9% decrease in mean RGC density at 4 weeks. In comparison, VPA treatment yielded significant amplitude preservation at 2 and 4 weeks and showed significant RGC density preservation at 4 weeks. No significant difference in RGC densities or IOPs was measured between control eyes of vehicle- and VPA-treated rats. In ocular-hypertensive eyes, class I HDAC activity was significantly elevated within 1 week (13.3 ± 2.2%) and histone H3 acetylation was significantly reduced within 2 weeks following the induction of ocular hypertension. CONCLUSIONS Increase in HDAC activity is a relatively early retinal event induced by elevated IOP, and suppressing HDAC activity can protect RGCs from ocular-hypertensive stress. Together these data provide a basis for developing HDAC inhibitors for the treatment of optic neuropathies.
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Affiliation(s)
- Oday Alsarraf
- Storm Eye Institute, Department of Ophthalmology, Medical University of South Carolina, Charleston, South Carolina, United States
| | - Jie Fan
- Storm Eye Institute, Department of Ophthalmology, Medical University of South Carolina, Charleston, South Carolina, United States
| | - Mohammad Dahrouj
- Storm Eye Institute, Department of Ophthalmology, Medical University of South Carolina, Charleston, South Carolina, United States
| | - C James Chou
- Storm Eye Institute, Department of Ophthalmology, Medical University of South Carolina, Charleston, South Carolina, United States
| | - Phillip W Yates
- Storm Eye Institute, Department of Ophthalmology, Medical University of South Carolina, Charleston, South Carolina, United States
| | - Craig E Crosson
- Storm Eye Institute, Department of Ophthalmology, Medical University of South Carolina, Charleston, South Carolina, United States
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