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ZNF185 prevents stress fiber formation through the inhibition of RhoA in endothelial cells. Commun Biol 2023; 6:29. [PMID: 36631535 PMCID: PMC9834212 DOI: 10.1038/s42003-023-04416-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2022] [Accepted: 01/03/2023] [Indexed: 01/13/2023] Open
Abstract
Signaling through cAMP/protein kinase A (PKA) promotes endothelial barrier function to prevent plasma leakage induced by inflammatory mediators. The discovery of PKA substrates in endothelial cells increases our understanding of the molecular mechanisms involved in vessel maturation. In this study, we evaluate a cAMP inducer, forskolin, and a phospho-PKA substrate antibody to identify ZNF185 as a PKA substrate. ZNF185 interacts with PKA and colocalizes with F-actin in endothelial cells. Both ZNF185 and F-actin accumulate in the plasma membrane region in response to forskolin to stabilize the cortical actin structure. By contrast, ZNF185 knockdown disrupts actin filaments and promotes stress fiber formation without inflammatory mediators. Constitutive activation of RhoA is induced by ZNF185 knockdown, which results in forskolin-resistant endothelial barrier dysfunction. Knockout of mouse Zfp185 which is an orthologous gene of human ZNF185 increases vascular leakage in response to inflammatory stimuli in vivo. Thrombin protease is used as a positive control to assemble stress fibers via RhoA activation. Unexpectedly, ZNF185 is cleaved by thrombin, resulting in an N-terminal actin-targeting domain and a C-terminal PKA-interacting domain. Irreversible dysfunction of ZNF185 protein potentially causes RhoA-dependent stress fiber formation by thrombin.
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Chen X, Xie J, Tan Q, Li H, Lu J, Zhang X. Genistein improves systemic metabolism and enhances cold resistance by promoting adipose tissue beiging. Biochem Biophys Res Commun 2021; 558:154-160. [PMID: 33915329 DOI: 10.1016/j.bbrc.2021.04.067] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2021] [Accepted: 04/16/2021] [Indexed: 12/31/2022]
Abstract
Genistein, a naturally occurring phytoestrogen and a member of the large class of compounds known as isoflavones, exerts protective effects in several diseases. Recent studies indicate that genistein plays a critical role in controlling body weight, obesity-associated insulin resistance, and metabolic disorders, but its target organs in reversing obesity and related pathological conditions remain unclear. In this study, we showed that mice supplemented with 0.2% genistein in a high-fat diet for 12 weeks showed enhanced metabolic homeostasis, including reduced obesity, improved glucose uptake and insulin sensitivity, and alleviated hepatic steatosis. We also observed a beiging phenomenon in the white adipose tissue and reversal of brown adipose tissue whitening in these mice. These changes led to enhanced resistance to cold stress. Altogether, our data suggest that the improved metabolic profile in mice treated with genistein is likely a result of enhanced adipose tissue function.
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Affiliation(s)
- Xi Chen
- Department of Pediatrics, Affiliated Haikou Hospital of Xiangya Medical College, Central South University, Haikou, 570208, China; Department of Pediatrics, The Second Xiangya Hospital, Central South University, Changsha, 410010, China.
| | - Juanyu Xie
- Department of Cardiovascular Surgery, The Second Xiangya Hospital, Central South University, Changsha, 410010, China.
| | - Qingqing Tan
- Department of Biology, School of Arts and Sciences, University of Pittsburgh, Pittsburgh, PA, 15260, USA.
| | - Huan Li
- Department of Pediatrics, The Second Xiangya Hospital, Central South University, Changsha, 410010, China.
| | - Jun Lu
- Department of Pediatrics, Affiliated Haikou Hospital of Xiangya Medical College, Central South University, Haikou, 570208, China.
| | - Xingxing Zhang
- Department of Pediatrics, The Second Xiangya Hospital, Central South University, Changsha, 410010, China.
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Du W, Ren L, Hamblin MH, Fan Y. Endothelial Cell Glucose Metabolism and Angiogenesis. Biomedicines 2021; 9:biomedicines9020147. [PMID: 33546224 PMCID: PMC7913320 DOI: 10.3390/biomedicines9020147] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2020] [Revised: 01/31/2021] [Accepted: 01/31/2021] [Indexed: 12/14/2022] Open
Abstract
Angiogenesis, a process of new blood vessel formation from the pre-existing vascular bed, is a critical event in various physiological and pathological settings. Over the last few years, the role of endothelial cell (EC) metabolism in angiogenesis has received considerable attention. Accumulating studies suggest that ECs rely on aerobic glycolysis, rather than the oxidative phosphorylation pathway, to produce ATP during angiogenesis. To date, numerous critical regulators of glucose metabolism, fatty acid oxidation, and glutamine metabolism have been identified to modulate the EC angiogenic switch and pathological angiogenesis. The unique glycolytic feature of ECs is critical for cell proliferation, migration, and responses to environmental changes. In this review, we provide an overview of recent EC glucose metabolism studies, particularly glycolysis, in quiescent and angiogenic ECs. We also summarize and discuss potential therapeutic strategies that take advantage of EC metabolism. The elucidation of metabolic regulation and the precise underlying mechanisms could facilitate drug development targeting EC metabolism to treat angiogenesis-related diseases.
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Affiliation(s)
- Wa Du
- Department of Cancer Biology, University of Cincinnati College of Medicine, Cincinnati, OH 45267, USA; (W.D.); (L.R.)
| | - Lu Ren
- Department of Cancer Biology, University of Cincinnati College of Medicine, Cincinnati, OH 45267, USA; (W.D.); (L.R.)
| | - Milton H. Hamblin
- Department of Pharmacology, Tulane University School of Medicine, New Orleans, LA 70112, USA;
| | - Yanbo Fan
- Department of Cancer Biology, University of Cincinnati College of Medicine, Cincinnati, OH 45267, USA; (W.D.); (L.R.)
- Department of Internal Medicine, Division of Cardiovascular Health and Diseases, University of Cincinnati College of Medicine, Cincinnati, OH 45267, USA
- Correspondence:
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Jing Z, Wei-Jie Y. Effects of soy protein containing isoflavones in patients with chronic kidney disease: A systematic review and meta-analysis. Clin Nutr 2016; 35:117-124. [DOI: 10.1016/j.clnu.2015.03.012] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2014] [Revised: 01/30/2015] [Accepted: 03/22/2015] [Indexed: 12/25/2022]
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Jia Z, Nallasamy P, Liu D, Shah H, Li JZ, Chitrakar R, Si H, McCormick J, Zhu H, Zhen W, Li Y. Luteolin protects against vascular inflammation in mice and TNF-alpha-induced monocyte adhesion to endothelial cells via suppressing IΚBα/NF-κB signaling pathway. J Nutr Biochem 2014; 26:293-302. [PMID: 25577468 DOI: 10.1016/j.jnutbio.2014.11.008] [Citation(s) in RCA: 105] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2014] [Revised: 10/06/2014] [Accepted: 11/13/2014] [Indexed: 01/09/2023]
Abstract
Vascular inflammation plays a significant role in the pathogenesis of atherosclerosis. Luteolin, a naturally occurring flavonoid present in many medicinal plants and some commonly consumed fruits and vegetables, has received wide attention for its potential to improve vascular function in vitro. However, its effect in vivo and the molecular mechanism of luteolin at physiological concentrations remain unclear. Here, we report that luteolin as low as 0.5 μM significantly inhibited tumor necrosis factor (TNF)-α-induced adhesion of monocytes to human EA.hy 926 endothelial cells, a key event in triggering vascular inflammation. Luteolin potently suppressed TNF-α-induced expression of the chemokine monocyte chemotactic protein-1 (MCP-1) and adhesion molecules intercellular adhesion molecule-1 (ICAM-1) and vascular cell adhesion molecule-1 (VCAM-1), key mediators involved in enhancing endothelial cell-monocyte interaction. Furthermore, luteolin inhibited TNF-α-induced nuclear factor (NF)-κB transcriptional activity, IκBα degradation, expression of IκB kinase β and subsequent NF-κB p65 nuclear translocation in endothelial cells, suggesting that luteolin can inhibit inflammation by suppressing NF-κB signaling. In an animal study, C57BL/6 mice were fed a diet containing 0% or 0.6% luteolin for 3 weeks, and luteolin supplementation greatly suppressed TNF-α-induced increase in circulating levels of MCP-1/JE, CXCL1/KC and sICAM-1 in C57BL/6 mice. Consistently, dietary intake of luteolin significantly reduced TNF-α-stimulated adhesion of monocytes to aortic endothelial cells ex vivo. Histology shows that luteolin treatment prevented the eruption of endothelial lining in the intima layer of the aorta and preserved elastin fibers' delicate organization as shown by Verhoeff-Van Gieson staining. Immunohistochemistry studies further show that luteolin treatment also reduced VCAM-1 and monocyte-derived F4/80-positive macrophages in the aorta of TNF-α-treated mice. In conclusion, luteolin protects against TNF-α-induced vascular inflammation in both in vitro and in vivo models. This anti-inflammatory effect of luteolin may be mediated via inhibition of the NF-κB-mediated pathway.
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Affiliation(s)
- Zhenquan Jia
- Department of Biology, The University of North Carolina at Greensboro, Greensboro, NC 27412.
| | - Palanisamy Nallasamy
- Department of Biology, The University of North Carolina at Greensboro, Greensboro, NC 27412
| | - Dongmin Liu
- Departments of Human Nutrition, Foods and Exercise, College of Agriculture and Life Sciences, Virginia Tech, Blacksburg, VA 24062, USA.
| | - Halley Shah
- Department of Biology, The University of North Carolina at Greensboro, Greensboro, NC 27412
| | - Jason Z Li
- College and Graduate School of Arts & Sciences, University of Virginia, Charlottesville, VA 22904
| | - Rojin Chitrakar
- Department of Biology, The University of North Carolina at Greensboro, Greensboro, NC 27412
| | - Hongwei Si
- Department of Family Consumer Sciences, College of Agriculture, Human and Natural Sciences, Tennessee State University, Nashville, TN 37209, USA
| | - John McCormick
- Department of Biology, The University of North Carolina at Greensboro, Greensboro, NC 27412
| | - Hong Zhu
- Department of Pharmacology, Campbell University, School of Osteopathic Medicine, Buies Creek, NC 27506, USA
| | - Wei Zhen
- Departments of Human Nutrition, Foods and Exercise, College of Agriculture and Life Sciences, Virginia Tech, Blacksburg, VA 24062, USA
| | - Yunbo Li
- Department of Biology, The University of North Carolina at Greensboro, Greensboro, NC 27412; Department of Pharmacology, Campbell University, School of Osteopathic Medicine, Buies Creek, NC 27506, USA.
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Vasiadi M, Newman J, Theoharides TC. Isoflavones inhibit poly(I:C)-induced serum, brain, and skin inflammatory mediators - relevance to chronic fatigue syndrome. J Neuroinflammation 2014; 11:168. [PMID: 25359293 PMCID: PMC4236420 DOI: 10.1186/s12974-014-0168-5] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2014] [Accepted: 09/17/2014] [Indexed: 02/06/2023] Open
Abstract
Background Chronic Fatigue Syndrome (CFS) is a neuroimmunoendocrine disease affecting about 1% of the US population, mostly women. It is characterized by debilitating fatigue for six or more months in the absence of cancer or other systemic diseases. Many CFS patients also have fibromyalgia and skin hypersensitivity that worsen with stress. Corticotropin-releasing hormone (CRH) and neurotensin (NT), secreted under stress, activate mast cells (MC) necessary for allergic reactions to release inflammatory mediators that could contribute to CFS symptoms. Objective To investigate the effect of isoflavones on the action of polyinosinic:polycytidylic acid (poly(I:C)), with or without swim stress, on mouse locomotor activity and inflammatory mediator expression, as well as on human MC activation. Methods Female C57BL/6 mice were randomly divided into four groups: (a) control/no-swim, (b) control/swim, (c) polyinosinic:polycytidylic acid (poly(I:C))/no swim, and (d) polyinosinic:polycytidylic acid (poly(I:C))/swim. Mice were provided with chow low or high in isoflavones for 2 weeks prior to ip injection with 20 mg/kg poly(I:C) followed or not by swim stress for 15 minutes. Locomotor activity was monitored overnight and animals were sacrificed the following day. Brain and skin gene expression, as well as serum levels, of inflammatory mediators were measured. Data were analyzed using the non-parametric Mann-Whitney U-test. Results Poly(I:C)-treated mice had decreased locomotor activity over 24 hours, and increased serum levels of TNF-α, IL-6, KC (IL-8/CXCL8 murine homolog), CCL2,3,4,5, CXCL10, as well as brain and skin gene expression of TNF, IL-6, KC (Cxcl1, IL8 murine homolog), CCL2, CCL4, CCL5 and CXCL10. Histidine decarboxylase (HDC) and NT expression were also increased, but only in the skin, over the same period. High isoflavone diet reversed these effects. Conclusion Poly(I:C) treatment decreased mouse locomotor activity and increased serum levels and brain and skin gene expression of inflammatory mediators. These effects were inhibited by isoflavones that may prove useful in CFS. Electronic supplementary material The online version of this article (doi:10.1186/s12974-014-0168-5) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Magdalini Vasiadi
- Department of Integrative Physiology and Pathobiology, Molecular Immunopharmacology and Drug Discovery Laboratory, Tufts University School of Medicine, 136 Harrison Avenue, Boston, MA, 02111, USA. .,Graduate Program in Pharmacology and Experimental Therapeutics, Sackler School of Graduate Biomedical Sciences, Tufts University, Boston, MA, USA.
| | - Jennifer Newman
- Department of Neuroscience, Tufts University, School of Medicine, Boston, MA, USA.
| | - Theoharis C Theoharides
- Department of Integrative Physiology and Pathobiology, Molecular Immunopharmacology and Drug Discovery Laboratory, Tufts University School of Medicine, 136 Harrison Avenue, Boston, MA, 02111, USA. .,Graduate Program in Pharmacology and Experimental Therapeutics, Sackler School of Graduate Biomedical Sciences, Tufts University, Boston, MA, USA. .,Department of Internal Medicine, Tufts University School of Medicine and Tufts Medical Center, Boston, MA, USA.
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García-Ponce A, Citalán-Madrid AF, Velázquez-Avila M, Vargas-Robles H, Schnoor M. The role of actin-binding proteins in the control of endothelial barrier integrity. Thromb Haemost 2014; 113:20-36. [PMID: 25183310 DOI: 10.1160/th14-04-0298] [Citation(s) in RCA: 95] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2014] [Accepted: 07/01/2014] [Indexed: 01/19/2023]
Abstract
The endothelial barrier of the vasculature is of utmost importance for separating the blood stream from underlying tissues. This barrier is formed by tight and adherens junctions (TJ and AJ) that form intercellular endothelial contacts. TJ and AJ are integral membrane structures that are connected to the actin cytoskeleton via various adaptor molecules. Consequently, the actin cytoskeleton plays a crucial role in regulating the stability of endothelial cell contacts and vascular permeability. While a circumferential cortical actin ring stabilises junctions, the formation of contractile stress fibres, e. g. under inflammatory conditions, can contribute to junction destabilisation. However, the role of actin-binding proteins (ABP) in the control of vascular permeability has long been underestimated. Naturally, ABP regulate permeability via regulation of actin remodelling but some actin-binding molecules can also act independently of actin and control vascular permeability via various signalling mechanisms such as activation of small GTPases. Several studies have recently been published highlighting the importance of actin-binding molecules such as cortactin, ezrin/radixin/moesin, Arp2/3, VASP or WASP for the control of vascular permeability by various mechanisms. These proteins have been described to regulate vascular permeability under various pathophysiological conditions and are thus of clinical relevance as targets for the development of treatment strategies for disorders that are characterised by vascular hyperpermeability such as sepsis. This review highlights recent advances in determining the role of ABP in the control of endothelial cell contacts and vascular permeability.
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Affiliation(s)
| | | | | | | | - Michael Schnoor
- Dr. Michael Schnoor, CINVESTAV del IPN, Department for Molecular Biomedicine, Av. IPN 2508, San Pedro Zacatenco, GAM, 07360 Mexico City, Mexico, Tel.: +52 55 5747 3321, Fax: +52 55 5747 3938, E-mail:
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Spear M, Guo J, Wu Y. Novel anti-HIV therapeutics targeting chemokine receptors and actin regulatory pathways. Immunol Rev 2014; 256:300-12. [PMID: 24117829 DOI: 10.1111/imr.12106] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
The human immunodeficiency virus-1 (HIV-1) infects helper CD4(+) T cells, and causes CD4(+) T-cell depletion and immunodeficiency. In the past 30 years, significant progress has been made in antiretroviral therapy, and the disease has become manageable. Nevertheless, an effective vaccine is still nowhere in sight, and a cure or a functional cure awaits discovery. Among possible curative therapies, traditional antiretroviral therapy, mostly targeting viral proteins, has been proven ineffective. It is possible that targeting HIV-dependent host cofactors may offer alternatives, both for preventing HIV transmission and for forestalling disease progression. Recently, the actin cytoskeleton and its regulators in blood CD4(+) T cells have emerged as major host cofactors that could be targeted. The novel concept that the cortical actin is a barrier to viral entry and early post-entry migration has led to the nascent model of virus-host interaction at the cortical actin layer. Deciphering the cellular regulatory pathways has manifested exciting prospects for future therapeutics. In this review, we describe the study of HIV interactions with actin cytoskeleton. We also examine potential pharmacological targets that emerge from this interaction. In addition, we briefly discuss several actin pathway-based anti-HIV drugs that are currently in development or testing.
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Affiliation(s)
- Mark Spear
- National Center for Biodefense and Infectious Diseases, Department of Molecular and Microbiology, George Mason University, Manassas, VA, USA
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