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Yang W, Arora M, Han HW, Jiang W, Kim DM, Ai W, Pan Q, Kumar MNVR, Brashear WA, Sun Y, Guo S. ZnPP-laden nanoparticles improve glucose homeostasis and chronic inflammation during obesity. Br J Pharmacol 2024; 181:2886-2904. [PMID: 38679457 DOI: 10.1111/bph.16356] [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: 07/18/2023] [Revised: 01/16/2024] [Accepted: 02/09/2024] [Indexed: 05/01/2024] Open
Abstract
BACKGROUND AND PURPOSE Chronic inflammation plays a pivotal role in the development of Type 2 diabetes mellitus (T2DM). Previous studies have shown that haem oxygenase-1 (HO-1) plays a proinflammatory role during metabolic stress, suggesting that HO-1 inhibition could be an effective strategy to treat T2DM. However, the application of HO-1 inhibitors is restricted due to solubility-limited bioavailability. In this study, we encapsulated the HO-1 inhibitor, zinc protoporphyrin IX (ZnPP), within nanoparticles and investigated their role in regulating glucose homeostasis and chronic inflammation during obesity. EXPERIMENTAL APPROACH We delivered DMSO-dissolved ZnPP (DMSO-ZnPP) and ZnPP-laden nanoparticles (Nano-ZnPP) to diet-induced obese male mice for 6 weeks. Glucose and insulin tolerance tests were carried out, liver and adipose tissue gene expression profiles analysed, and systemic inflammation analysed using flow cytometry. KEY RESULTS Nanoparticles significantly increased the delivery efficiency of ZnPP in both cells and mice. In mice with diet-induced obesity, inhibition of HO-1 by Nano-ZnPP significantly decreased adiposity, increased insulin sensitivity, and improved glucose tolerance. Moreover, Nano-ZnPP treatment attenuated both local and systemic inflammatory levels during obesity. Mechanistically, Nano-ZnPP significantly attenuated glucagon, TNF, and fatty acid synthesis signalling pathways in the liver. In white adipose tissue, the oxidative phosphorylation signalling pathway was enhanced and the inflammation signalling pathway diminished by Nano-ZnPP. Our results show that Nano-ZnPP has better effects on the improvement of glucose homeostasis and attenuation of chronic inflammation, than those of DMSO-dissolved ZnPP. CONCLUSIONS AND IMPLICATIONS These findings indicate that ZnPP-laden nanoparticles are potential therapeutic agents for treating T2DM.
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Affiliation(s)
- Wanbao Yang
- Department of Nutrition, College of Agriculture and Life Sciences, Texas A&M University, College Station, Texas, USA
| | - Meenakshi Arora
- College of Community Health Sciences, The University of Alabama, Tuscaloosa, Alabama, USA
- The Center for Convergent Bioscience and Medicine (CCBM), The University of Alabama, Tuscaloosa, Alabama, USA
| | - Hye Won Han
- Department of Nutrition, College of Agriculture and Life Sciences, Texas A&M University, College Station, Texas, USA
| | - Wen Jiang
- Department of Nutrition, College of Agriculture and Life Sciences, Texas A&M University, College Station, Texas, USA
| | - Da Mi Kim
- Department of Nutrition, College of Agriculture and Life Sciences, Texas A&M University, College Station, Texas, USA
| | - Weiqi Ai
- Department of Nutrition, College of Agriculture and Life Sciences, Texas A&M University, College Station, Texas, USA
| | - Quan Pan
- Department of Nutrition, College of Agriculture and Life Sciences, Texas A&M University, College Station, Texas, USA
| | - M N V Ravi Kumar
- College of Community Health Sciences, The University of Alabama, Tuscaloosa, Alabama, USA
- The Center for Convergent Bioscience and Medicine (CCBM), The University of Alabama, Tuscaloosa, Alabama, USA
| | - Wesley A Brashear
- High Performance Research Computing, Texas A&M University, College Station, Texas, USA
| | - Yuxiang Sun
- Department of Nutrition, College of Agriculture and Life Sciences, Texas A&M University, College Station, Texas, USA
| | - Shaodong Guo
- Department of Nutrition, College of Agriculture and Life Sciences, Texas A&M University, College Station, Texas, USA
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Jiang YJ, Cao YM, Cao YB, Yan TH, Jia CL, He P. A Review: Cytochrome P450 in Alcoholic and Non-Alcoholic Fatty Liver Disease. Diabetes Metab Syndr Obes 2024; 17:1511-1521. [PMID: 38586542 PMCID: PMC10997053 DOI: 10.2147/dmso.s449494] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/12/2023] [Accepted: 03/16/2024] [Indexed: 04/09/2024] Open
Abstract
Alcoholic fatty liver disease (FALD) and non-alcoholic fatty liver disease (NAFLD) have similar pathological spectra, both of which are associated with a series of symptoms, including steatosis, inflammation, and fibrosis. These clinical manifestations are caused by hepatic lipid synthesis and metabolism dysregulation and affect human health. Despite having been studied extensively, targeted therapies remain elusive. The Cytochrome P450 (CYP450) family is the most important drug-metabolising enzyme in the body, primarily in the liver. It is responsible for the metabolism of endogenous and exogenous compounds, completing biological transformation. This process is relevant to the occurrence and development of AFLD and NAFLD. In this review, the correlation between CYP450 and liver lipid metabolic diseases is summarised, providing new insights for the treatment of AFLD and NAFLD.
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Affiliation(s)
- Yu-Jie Jiang
- Institute of Vascular Anomalies, Shanghai Academy of Traditional Chinese Medicine, Shanghai, 200082, People’s Republic of China
- Department of Basic Medicine and Clinical Pharmacy, China Pharmaceutical University, Nanjing, 211100, People’s Republic of China
| | - Ye-Ming Cao
- Institute of Vascular Anomalies, Shanghai Academy of Traditional Chinese Medicine, Shanghai, 200082, People’s Republic of China
| | - Yong-Bing Cao
- Institute of Vascular Anomalies, Shanghai Academy of Traditional Chinese Medicine, Shanghai, 200082, People’s Republic of China
| | - Tian-Hua Yan
- Department of Basic Medicine and Clinical Pharmacy, China Pharmaceutical University, Nanjing, 211100, People’s Republic of China
| | - Cheng-Lin Jia
- Institute of Vascular Anomalies, Shanghai Academy of Traditional Chinese Medicine, Shanghai, 200082, People’s Republic of China
| | - Ping He
- Institute of Vascular Anomalies, Shanghai Academy of Traditional Chinese Medicine, Shanghai, 200082, People’s Republic of China
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Shoris I, Gover A, Toropine A, Iofe A, Zoabi-Safadi R, Tsuprun S, Riskin A. "Light" on Phototherapy-Complications and Strategies for Shortening Its Duration, A Review of the Literature. CHILDREN (BASEL, SWITZERLAND) 2023; 10:1699. [PMID: 37892362 PMCID: PMC10605061 DOI: 10.3390/children10101699] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2023] [Revised: 10/01/2023] [Accepted: 10/15/2023] [Indexed: 10/29/2023]
Abstract
Neonatal hyperbilirubinemia is an extremely common metabolic complication of the neonatal period which may be associated with bilirubin encephalopathy and even death. Adverse neurological consequences are preventable if a timely diagnosis and treatment are provided. Phototherapy is usually the preferred option to decrease hyperbilirubinemia. Although considered to be safe, evidence in recent years has shown that this treatment may not be free of side effects and short- and long-term unfavorable outcomes. These are usually mild or rare, but should be decreased or avoided if possible. Many useful complementary measures and treatments have been described that could shorten the duration of exposure to phototherapy. However, there is no current unequivocal recommendation to use any of the methods presented in this review. Our review aims to depict the wide range of possible complementary treatments to phototherapy, and to provide the scientific and clinical evidence available regarding their usefulness. It is essential that, while utilizing the full potential of phototherapy to treat hyperbilirubinemia, caregivers are aware of its side effects and possible inherent dangers, and seek ways to minimize the exposure to phototherapy to what is really needed for the newborn. Further studies are needed to clarify the preferred complementary treatments that could reduce the duration of exposure to phototherapy without impairing its effectiveness.
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Affiliation(s)
- Irit Shoris
- Department of Neonatology, Bnai Zion Medical Center, 47 Golomb Street, P.O. Box 4940, Haifa 31048, Israel
- Rappaport Faculty of Medicine, Technion—Israel Institute of Technology, P.O. Box 9697, Haifa 32000, Israel; (I.S.); (A.G.); (A.T.); (A.I.); (R.Z.-S.); (S.T.)
| | - Ayala Gover
- Department of Neonatology, Bnai Zion Medical Center, 47 Golomb Street, P.O. Box 4940, Haifa 31048, Israel
- Rappaport Faculty of Medicine, Technion—Israel Institute of Technology, P.O. Box 9697, Haifa 32000, Israel; (I.S.); (A.G.); (A.T.); (A.I.); (R.Z.-S.); (S.T.)
| | - Arina Toropine
- Department of Neonatology, Bnai Zion Medical Center, 47 Golomb Street, P.O. Box 4940, Haifa 31048, Israel
- Rappaport Faculty of Medicine, Technion—Israel Institute of Technology, P.O. Box 9697, Haifa 32000, Israel; (I.S.); (A.G.); (A.T.); (A.I.); (R.Z.-S.); (S.T.)
| | - Adir Iofe
- Department of Neonatology, Bnai Zion Medical Center, 47 Golomb Street, P.O. Box 4940, Haifa 31048, Israel
- Rappaport Faculty of Medicine, Technion—Israel Institute of Technology, P.O. Box 9697, Haifa 32000, Israel; (I.S.); (A.G.); (A.T.); (A.I.); (R.Z.-S.); (S.T.)
| | - Rasha Zoabi-Safadi
- Department of Neonatology, Bnai Zion Medical Center, 47 Golomb Street, P.O. Box 4940, Haifa 31048, Israel
- Rappaport Faculty of Medicine, Technion—Israel Institute of Technology, P.O. Box 9697, Haifa 32000, Israel; (I.S.); (A.G.); (A.T.); (A.I.); (R.Z.-S.); (S.T.)
| | - Svetlana Tsuprun
- Department of Neonatology, Bnai Zion Medical Center, 47 Golomb Street, P.O. Box 4940, Haifa 31048, Israel
- Rappaport Faculty of Medicine, Technion—Israel Institute of Technology, P.O. Box 9697, Haifa 32000, Israel; (I.S.); (A.G.); (A.T.); (A.I.); (R.Z.-S.); (S.T.)
| | - Arieh Riskin
- Department of Neonatology, Bnai Zion Medical Center, 47 Golomb Street, P.O. Box 4940, Haifa 31048, Israel
- Rappaport Faculty of Medicine, Technion—Israel Institute of Technology, P.O. Box 9697, Haifa 32000, Israel; (I.S.); (A.G.); (A.T.); (A.I.); (R.Z.-S.); (S.T.)
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Silva LDD, Pinheiro JLS, Rodrigues LHM, Santos VMRD, Borges JLF, Oliveira RRD, Maciel LG, Araújo TDSL, Martins CDS, Gomes DA, Lira EC, Souza MHLP, Medeiros JVR, Damasceno ROS. Crucial role of carbon monoxide as a regulator of diarrhea caused by cholera toxin: Evidence of direct interaction with toxin. Biochem Pharmacol 2023; 216:115791. [PMID: 37689274 DOI: 10.1016/j.bcp.2023.115791] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2023] [Revised: 09/01/2023] [Accepted: 09/06/2023] [Indexed: 09/11/2023]
Abstract
The present study evaluated the role of heme oxygenase 1 (HO-1)/carbon monoxide (CO) pathway in the cholera toxin-induced diarrhea and its possible action mechanism. The pharmacological modulation with CORM-2 (a CO donor) or Hemin (a HO-1 inducer) decreased the intestinal fluid secretion and Cl- efflux, altered by cholera toxin. In contrast, ZnPP (a HO-1 inhibitor) reversed the antisecretory effect of Hemin and potentiated cholera toxin-induced intestinal secretion. Moreover, CORM-2 also prevented the alteration of intestinal epithelial architecture and local vascular permeability promoted by cholera toxin. The intestinal absorption was not altered by any of the pharmacological modulators. Cholera toxin inoculation also increased HO-1 immunoreactivity and bilirubin levels, a possible protective physiological response. Finally, using fluorometric technique, ELISA assay and molecular docking simulations, we show evidence that CO directly interacts with cholera toxin, forming a complex that affects its binding to GM1 receptor, which help explain the antisecretory effect. Thus, CO is an essential molecule for protection against choleric diarrhea and suggests its use as a possible therapeutic tool.
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Affiliation(s)
- Lorena Duarte da Silva
- Department of Physiology and Pharmacology, Federal University of Pernambuco, Recife, PE, Brazil
| | | | | | | | | | | | | | | | | | - Dayane Aparecida Gomes
- Department of Physiology and Pharmacology, Federal University of Pernambuco, Recife, PE, Brazil
| | - Eduardo Carvalho Lira
- Department of Physiology and Pharmacology, Federal University of Pernambuco, Recife, PE, Brazil
| | | | - Jand Venes Rolim Medeiros
- Biotechnology and Biodiversity Center Research, Parnaíba Delta Federal University, Parnaíba, PI, Brazil
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Efficacy and Safety Concerns with Sn-Mesoporphyrin as an Adjunct Therapy in Neonatal Hyperbilirubinemia: A Literature Review. Int J Pediatr 2022; 2022:2549161. [PMID: 35898803 PMCID: PMC9314175 DOI: 10.1155/2022/2549161] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/22/2022] [Accepted: 06/29/2022] [Indexed: 11/25/2022] Open
Abstract
Neonatal hyperbilirubinemia is a frequently observed clinical situation that, sometimes, may result in complications ranging from mild neurodevelopment impairment to serious outcome of kernicterus. The rationale logic of heme oxygenase enzyme inhibition to lower bilirubin levels is intriguing. In compliance with that rationale, metalloporphyrin was discovered. After successful results in in-vitro and animal studies, tin mesoporphyrin is now under phase II clinical trial to test for preventive and therapeutic efficacy in unconjugated hyperbilirubinemia. This review evaluates in-vitro studies, animal studies, and clinical trials for the efficacy and safety of tin analogues of metalloporphyrin. Few alternatives to metalloporphyrins are also available, synchronizing with the same rationale logic of inhibition of bilirubin production, which need further research.
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Heme Oxygenase-1 Signaling and Redox Homeostasis in Physiopathological Conditions. Biomolecules 2021; 11:biom11040589. [PMID: 33923744 PMCID: PMC8072688 DOI: 10.3390/biom11040589] [Citation(s) in RCA: 95] [Impact Index Per Article: 31.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2021] [Revised: 04/07/2021] [Accepted: 04/14/2021] [Indexed: 02/06/2023] Open
Abstract
Heme-oxygenase is the enzyme responsible for degradation of endogenous iron protoporphyirin heme; it catalyzes the reaction’s rate-limiting step, resulting in the release of carbon monoxide (CO), ferrous ions, and biliverdin (BV), which is successively reduced in bilirubin (BR) by biliverdin reductase. Several studies have drawn attention to the controversial role of HO-1, the enzyme inducible isoform, pointing out its implications in cancer and other diseases development, but also underlining the importance of its antioxidant activity. The contribution of HO-1 in redox homeostasis leads to a relevant decrease in cells oxidative damage, which can be reconducted to its cytoprotective effects explicated alongside other endogenous mechanisms involving genes like TIGAR (TP53-induced glycolysis and apoptosis regulator), but also to the therapeutic functions of heme main transformation products, especially carbon monoxide (CO), which has been shown to be effective on GSH levels implementation sustaining body’s antioxidant response to oxidative stress. The aim of this review was to collect most of the knowledge on HO-1 from literature, analyzing different perspectives to try and put forward a hypothesis on revealing yet unknown HO-1-involved pathways that could be useful to promote development of new therapeutical strategies, and lay the foundation for further investigation to fully understand this important antioxidant system.
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7
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Martinez M, Fendley GA, Saxberg AD, Zoghbi ME. Stimulation of the human mitochondrial transporter ABCB10 by zinc-mesoporphrin. PLoS One 2020; 15:e0238754. [PMID: 33253225 PMCID: PMC7703921 DOI: 10.1371/journal.pone.0238754] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2020] [Accepted: 11/06/2020] [Indexed: 11/19/2022] Open
Abstract
Heme biosynthesis occurs through a series of reactions that take place within the cytoplasm and mitochondria, so intermediates need to move across these cellular compartments. However, the specific membrane transport mechanisms involved in the process are not yet identified. The ATP-binding cassette protein ABCB10 is essential for normal heme production, as knocking down this transporter in mice is embryonically lethal and accompanied by severe anemia plus oxidative damage. The role of ABCB10 is unknown, but given its location in the inner mitochondrial membrane, it has been proposed as a candidate to export either an early heme precursor or heme. Alternatively, ABCB10 might transport a molecule important for protection against oxidative damage. To help discern between these possibilities, we decided to study the effect of heme analogs, precursors, and antioxidant peptides on purified human ABCB10. Since substrate binding increases the ATP hydrolysis rate of ABC transporters, we have determined the ability of these molecules to activate purified ABCB10 reconstituted in lipid nanodiscs using ATPase measurements. Under our experimental conditions, we found that the only heme analog increasing ABCB10 ATPase activity was Zinc-mesoporphyrin. This activation of almost seventy percent was specific for ABCB10, as the ATPase activity of a negative control bacterial ABC transporter was not affected. The activation was also observed in cysteine-less ABCB10, suggesting that Zinc-mesoporphyrin's effect did not require binding to typical heme regulatory motifs. Furthermore, our data indicate that ABCB10 was not directly activated by neither the early heme precursor delta-aminolevulinic acid nor glutathione, downsizing their relevance as putative substrates for this transporter. Although additional studies are needed to determine the physiological substrate of ABCB10, our findings reveal Zinc-mesoporphyrin as the first tool compound to directly modulate ABCB10 activity and raise the possibility that some actions of Zinc-mesoporphyrin in cellular and animal studies could be mediated by ABCB10.
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Affiliation(s)
- Melissa Martinez
- Department of Molecular Cell Biology, School of Natural Sciences, University of California Merced, Merced, California, United States of America
| | - Gregory A. Fendley
- Department of Molecular Cell Biology, School of Natural Sciences, University of California Merced, Merced, California, United States of America
| | - Alexandra D. Saxberg
- Department of Molecular Cell Biology, School of Natural Sciences, University of California Merced, Merced, California, United States of America
| | - Maria E. Zoghbi
- Department of Molecular Cell Biology, School of Natural Sciences, University of California Merced, Merced, California, United States of America
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Targeting Heme Oxygenase-1 in the Arterial Response to Injury and Disease. Antioxidants (Basel) 2020; 9:antiox9090829. [PMID: 32899732 PMCID: PMC7554957 DOI: 10.3390/antiox9090829] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2020] [Revised: 08/31/2020] [Accepted: 09/03/2020] [Indexed: 02/06/2023] Open
Abstract
Heme oxygenase-1 (HO-1) catalyzes the degradation of heme into carbon monoxide (CO), iron, and biliverdin, which is rapidly metabolized to bilirubin. The activation of vascular smooth muscle cells (SMCs) plays a critical role in mediating the aberrant arterial response to injury and a number of vascular diseases. Pharmacological induction or gene transfer of HO-1 improves arterial remodeling in animal models of post-angioplasty restenosis, vascular access failure, atherosclerosis, transplant arteriosclerosis, vein grafting, and pulmonary arterial hypertension, whereas genetic loss of HO-1 exacerbates the remodeling response. The vasoprotection evoked by HO-1 is largely ascribed to the generation of CO and/or the bile pigments, biliverdin and bilirubin, which exert potent antioxidant and anti-inflammatory effects. In addition, these molecules inhibit vascular SMC proliferation, migration, apoptosis, and phenotypic switching. Several therapeutic strategies are currently being pursued that may allow for the targeting of HO-1 in arterial remodeling in various pathologies, including the use of gene delivery approaches, the development of novel inducers of the enzyme, and the administration of unique formulations of CO and bilirubin.
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Activation of Heme Oxygenase Expression by Cobalt Protoporphyrin Treatment Prevents Pneumonic Plague Caused by Inhalation of Yersinia pestis. Antimicrob Agents Chemother 2020; 64:AAC.01819-19. [PMID: 32015027 PMCID: PMC7179272 DOI: 10.1128/aac.01819-19] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2019] [Accepted: 01/24/2020] [Indexed: 02/05/2023] Open
Abstract
Pneumonic plague, caused by the Gram-negative bacteria Yersinia pestis, is an invasive, rapidly progressing disease with poor survival rates. Following inhalation of Y. pestis, bacterial invasion of the lungs and a tissue-damaging inflammatory response allows vascular spread of the infection. Consequently, primary pneumonic plague is a multiorgan disease involving sepsis and necrosis of immune tissues and the liver, as well as bronchopneumonia and rampant bacterial growth. Given the likely role of the hyperinflammatory response in accelerating the destruction of tissue, in this work we evaluated the therapeutic potential of the inducible cytoprotective enzyme heme oxygenase 1 (HO-1) against primary pneumonic plague. On its own, the HO-1 inducer cobalt protoporphyrin IX (CoPP) provided mice protection from lethal challenge with Y. pestis CO92 with improved pulmonary bacterial clearance and a dampened inflammatory response compared to vehicle-treated mice. Furthermore, CoPP treatment combined with doxycycline strongly enhanced protection in a rat aerosol challenge model. Compared to doxycycline alone, CoPP treatment increased survival, with a 3-log decrease in median bacterial titer recovered from the lungs and the general absence of a systemic hyperinflammatory response. In contrast, treatment with the HO-1 inhibitor SnPP had no detectable impact on doxycycline efficacy. The combined data indicate that countering inflammatory toxicity by therapeutically inducing HO-1 is effective in reducing the rampant growth of Y. pestis and preventing pneumonic plague.
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Gray LT, Puig Lombardi E, Verga D, Nicolas A, Teulade-Fichou MP, Londoño-Vallejo A, Maizels N. G-quadruplexes Sequester Free Heme in Living Cells. Cell Chem Biol 2019; 26:1681-1691.e5. [PMID: 31668518 DOI: 10.1016/j.chembiol.2019.10.003] [Citation(s) in RCA: 47] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2019] [Revised: 08/13/2019] [Accepted: 10/02/2019] [Indexed: 02/07/2023]
Abstract
Heme is an essential cofactor for many enzymes, but free heme is toxic and its levels are tightly regulated. G-quadruplexes bind heme avidly in vitro, raising the possibility that they may sequester heme in vivo. If so, then treatment that displaces heme from quadruplexes is predicted to induce expression of genes involved in iron and heme homeostasis. Here we show that PhenDC3, a G-quadruplex ligand structurally unrelated to heme, displaces quadruplex-bound heme in vitro and alters transcription in cultured human cells, upregulating genes that support heme degradation and iron homeostasis, and most strikingly causing a 30-fold induction of heme oxidase 1, the key enzyme in heme degradation. We propose that G-quadruplexes sequester heme to protect cells from the pathophysiological consequences of free heme.
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Affiliation(s)
- Lucas T Gray
- Department of Immunology, University of Washington, 1959 NE Pacific St., Seattle, WA 98195, USA
| | - Emilia Puig Lombardi
- Institut Curie, Centre de Recherche, CNRS-UMR3244, PSL Research University, Paris 75005, France
| | - Daniela Verga
- Institut Curie, Centre de Recherche, CNRS-UMR9187, INSERM-U1196, PSL Research University, Sorbonne Universités, Orsay 91405, France; CNRS UMR9187, INSERM U1196, Université Paris Sud, Université Paris-Saclay, Orsay 91405, France
| | - Alain Nicolas
- Institut Curie, Centre de Recherche, CNRS-UMR3244, PSL Research University, Paris 75005, France
| | - Marie-Paule Teulade-Fichou
- Institut Curie, Centre de Recherche, CNRS-UMR9187, INSERM-U1196, PSL Research University, Sorbonne Universités, Orsay 91405, France; CNRS UMR9187, INSERM U1196, Université Paris Sud, Université Paris-Saclay, Orsay 91405, France
| | - Arturo Londoño-Vallejo
- Institut Curie, Centre de Recherche, CNRS-UMR3244, PSL Research University, Paris 75005, France
| | - Nancy Maizels
- Department of Immunology, University of Washington, 1959 NE Pacific St., Seattle, WA 98195, USA; Department of Biochemistry, University of Washington, 1959 NE Pacific St., Seattle, WA 98195, USA.
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Drummond GS, Baum J, Greenberg M, Lewis D, Abraham NG. HO-1 overexpression and underexpression: Clinical implications. Arch Biochem Biophys 2019; 673:108073. [PMID: 31425676 DOI: 10.1016/j.abb.2019.108073] [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: 05/29/2019] [Revised: 07/23/2019] [Accepted: 08/10/2019] [Indexed: 12/11/2022]
Abstract
In this review we examine the effects of both over- and under-production of heme oxygenase-1 (HO-1) and HO activity on a broad spectrum of biological systems and on vascular disease. In a few instances e.g., neonatal jaundice, overproduction of HO-1 and increased HO activity results in elevated levels of bilirubin requiring clinical intervention with inhibitors of HO activity. In contrast HO-1 levels and HO activity are low in obesity and the HO system responds to mitigate the deleterious effects of oxidative stress through increased levels of bilirubin (anti-inflammatory) and CO (anti-apoptotic) and decreased levels of heme (pro-oxidant). Site specific HO-1 overexpression diminishes adipocyte terminal differentiation and lipid accumulation of obesity mediated release of inflammatory molecules. A series of diverse strategies have been implemented that focus on increasing HO-1 and HO activity that are central to reversing the clinical complications associated with diseases including, obesity, metabolic syndrome and vascular disease.
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Affiliation(s)
- George S Drummond
- Department of Pharmacology, New York Medical College, Valhalla, NY, 10595, USA
| | - Jeffrey Baum
- Department of Medicine, New York Medical College, Valhalla, NY, 10595, USA; Department of Pharmacology, New York Medical College, Valhalla, NY, 10595, USA
| | - Menachem Greenberg
- Department of Medicine, New York Medical College, Valhalla, NY, 10595, USA; Department of Pharmacology, New York Medical College, Valhalla, NY, 10595, USA
| | - David Lewis
- Department of Medicine, New York Medical College, Valhalla, NY, 10595, USA; Department of Pharmacology, New York Medical College, Valhalla, NY, 10595, USA
| | - Nader G Abraham
- Department of Medicine, New York Medical College, Valhalla, NY, 10595, USA; Department of Pharmacology, New York Medical College, Valhalla, NY, 10595, USA; Joan C. Edwards School of Medicine, Marshall University, Huntington, WV, 25701, USA.
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Eltobshy SAG, Hussein AM, Elmileegy AA, Askar MH, Khater Y, Metias EF, Helal GM. Effects of heme oxygenase-1 upregulation on isoproterenol-induced myocardial infarction. THE KOREAN JOURNAL OF PHYSIOLOGY & PHARMACOLOGY : OFFICIAL JOURNAL OF THE KOREAN PHYSIOLOGICAL SOCIETY AND THE KOREAN SOCIETY OF PHARMACOLOGY 2019; 23:203-217. [PMID: 31080351 PMCID: PMC6488703 DOI: 10.4196/kjpp.2019.23.3.203] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/17/2018] [Revised: 12/23/2018] [Accepted: 12/31/2018] [Indexed: 12/18/2022]
Abstract
The present study was designed to examine the effect of heme oxygenase-1 (HO-1) induction by cobalt protoporphyrin (CoPP) on the cardiac functions and morphology, electrocardiogram (ECG) changes, myocardial antioxidants (superoxide dismutase [SOD] and glutathione [GSH]), and expression of heat shock protein (Hsp) 70 and connexin 43 (Cx-43) in myocardial muscles in isoproterenol (ISO) induced myocardial infarction (MI). Thirty two adult male Sprague Dawely rats were divided into 4 groups (each 8 rats): normal control (NC) group, ISO group: received ISO at dose of 150 mg/kg body weight intraperitoneally (i.p.) for 2 successive days; ISO + Trizma group: received (ISO) and Trizma (solvent of CoPP) at dose of 5 mg/kg i.p. injection 2 days before injection of ISO, with ISO at day 0 and at day 2 after ISO injections; and ISO + CoPP group: received ISO and CoPP at a dose of 5 mg/kg dissolved in Trizma i.p. injection as Trizma. We found that, administration of ISO caused significant increase in heart rate, corrected QT interval, ST segment, cardiac enzymes (lactate dehydrogenase, creatine kinase-muscle/brain), cardiac HO-1, Hsp70 with significant attenuation in myocardial GSH, SOD, and Cx-43. On the other hand, administration of CoPP caused significant improvement in ECG parameters, cardiac enzymes, cardiac morphology; antioxidants induced by ISO with significant increase in HO-1, Cx-43, and Hsp70 expression in myocardium. In conclusions, we concluded that induction of HO-1 by CoPP ameliorates ISO-induced myocardial injury, which might be due to up-regulation of Hsp70 and gap junction protein (Cx-43).
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Affiliation(s)
- Somaia A G Eltobshy
- Department of Physiology, Faculty of Medicine, Mansoura University, Mansoura 35516, Egypt
| | - Abdelaziz M Hussein
- Department of Physiology, Faculty of Medicine, Mansoura University, Mansoura 35516, Egypt
| | - Asaad A Elmileegy
- Department of Physiology, Faculty of Medicine, Mansoura University, Mansoura 35516, Egypt
| | - Mona H Askar
- Department of Physiology, Faculty of Medicine, Mansoura University, Mansoura 35516, Egypt
| | - Yomna Khater
- Medical Experimental Research Center, Faculty of Medicine, Mansoura University, Mansoura 35516, Egypt
| | - Emile F Metias
- Department of Physiology, Faculty of Medicine, Mansoura University, Mansoura 35516, Egypt
| | - Ghada M Helal
- Department of Medical Biochemistry, Faculty of Medicine, Mansoura University, Mansoura 35516, Egypt
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13
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Heme Oxygenase-1 protects astroglia against manganese-induced oxidative injury by regulating mitochondrial quality control. Toxicol Lett 2018; 295:357-368. [DOI: 10.1016/j.toxlet.2018.07.045] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2018] [Revised: 07/16/2018] [Accepted: 07/21/2018] [Indexed: 01/28/2023]
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14
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Yang PS, Hsu YC, Lee JJ, Chen MJ, Huang SY, Cheng SP. Heme Oxygenase-1 Inhibitors Induce Cell Cycle Arrest and Suppress Tumor Growth in Thyroid Cancer Cells. Int J Mol Sci 2018; 19:ijms19092502. [PMID: 30149527 PMCID: PMC6163304 DOI: 10.3390/ijms19092502] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2018] [Revised: 08/17/2018] [Accepted: 08/22/2018] [Indexed: 01/31/2023] Open
Abstract
Heme oxygenase-1 (HO-1) is induced by a variety of stimuli and plays a multifaceted role in cellular protection. We have shown that HO-1 is overexpressed in thyroid cancer and is associated with tumor aggressiveness. Therefore, we set out to assess the effects of HO-1 inhibitors on the biology of thyroid cancer cells. Two different classes of HO-1 inhibitors were used, including a metalloporphyrin, zinc protoporphyrin-IX (ZnPP), and an azole antifungal agent, ketoconazole. The viability and colony formation of thyroid cancer cells decreased in a concentration- and time-dependent fashion following treatment with HO-1 inhibitors. Cancer cells exhibited a higher sensitivity to HO-1 inhibitors than non-malignant cells. HO-1 inhibitors induced a G0/G1 arrest accompanied by decreased cyclin D1 and CDK4 expressions and an increase in levels of p21 and p27. HO-1 inhibitors significantly increased intracellular ROS levels and suppressed cell migration and invasion. Oxygen consumption rate and mitochondrial mass were increased with ZnPP treatment. Mice treated with ZnPP had a reduced xenograft growth and diminished cyclin D1 and Ki-67 staining in tumor sections. Taken together, HO-1 inhibitors might have therapeutic potential for inducing cell cycle arrest and promoting growth suppression of thyroid cancer cells in vitro and in vivo.
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Affiliation(s)
- Po-Sheng Yang
- Department of Surgery, MacKay Memorial Hospital and Mackay Medical College, Taipei 10449, Taiwan.
| | - Yi-Chiung Hsu
- Department of Biomedical Sciences and Engineering, National Central University, Taoyuan City 32001, Taiwan.
| | - Jie-Jen Lee
- Department of Surgery, MacKay Memorial Hospital and Mackay Medical College, Taipei 10449, Taiwan.
| | - Ming-Jen Chen
- Department of Surgery, MacKay Memorial Hospital and Mackay Medical College, Taipei 10449, Taiwan.
| | - Shih-Yuan Huang
- Department of Surgery, MacKay Memorial Hospital and Mackay Medical College, Taipei 10449, Taiwan.
| | - Shih-Ping Cheng
- Department of Surgery, MacKay Memorial Hospital and Mackay Medical College, Taipei 10449, Taiwan.
- Department of Pharmacology, School of Medicine, College of Medicine, Taipei Medical University, Taipei 11031, Taiwan.
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15
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Neurath AR, Strick N, Lin K, Debnath AK, Jiang S. Tin Protoporphyrin IX Used in Control of Heme Metabolism in Humans Effectively Inhibits HIV-1 Infection. ACTA ACUST UNITED AC 2016. [DOI: 10.1177/095632029400500506] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Recent observations indicated that several porphyrins bound to the V3 loop of the envelope glycoprotein gp120 of the human immunodeficiency virus type 1 (HIV-1) and inhibited infection of cells by HIV-1. The tin derivative of protoporphyrin IX (Sn-PTP-IX) has already been used clinically in humans to suppress hyperbilirubinemia. It was therefore of interest to determine whether Sn-PTP-IX has anti-HIV-1 activity. It is demonstrated here that Sn-PTP-IX effectively inhibited infection by several HIV-1 isolates (HIB, MN, RF, SF-2 and two isolates resistant to azidothymidine). This was surprising, since earlier studies indicated that incorporation of other metals into porphyrins markedly decreased their antiviral activity. Sn-PTP-IX blocked the binding to gp120 of anti-V3-loop-specific antibodies and of monoclonal antibodies specific for the CD4 binding site on gp120. The latter effect appeared to be allosteric and was not observed with a deletion mutant of gp 120 lacking the V3 loop sequence. This suggests that Sn-PTP-IX binds to the V3 loop and distorts the native conformation of the HIV-1 envelope, thereby preventing infection. These results merit the consideration of Sn-PTP-IX as a prophylactic and chemotherapeutic agent against HIV-1.
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Affiliation(s)
- A. R. Neurath
- The Lindsley F. Kimball Research Institute of the New York Blood Center, New York, NY 10021, USA
| | - N. Strick
- The Lindsley F. Kimball Research Institute of the New York Blood Center, New York, NY 10021, USA
| | - K. Lin
- The Lindsley F. Kimball Research Institute of the New York Blood Center, New York, NY 10021, USA
| | - A. K. Debnath
- The Lindsley F. Kimball Research Institute of the New York Blood Center, New York, NY 10021, USA
| | - S. Jiang
- The Lindsley F. Kimball Research Institute of the New York Blood Center, New York, NY 10021, USA
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Barr I, Weitz SH, Atkin T, Hsu P, Karayiorgou M, Gogos JA, Weiss S, Guo F. Cobalt(III) Protoporphyrin Activates the DGCR8 Protein and Can Compensate microRNA Processing Deficiency. ACTA ACUST UNITED AC 2016; 22:793-802. [PMID: 26091172 DOI: 10.1016/j.chembiol.2015.05.015] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2014] [Revised: 05/01/2015] [Accepted: 05/20/2015] [Indexed: 12/31/2022]
Abstract
Processing of microRNA primary transcripts (pri-miRNAs) is highly regulated and defects in the processing machinery play a key role in many human diseases. In 22q11.2 deletion syndrome (22q11.2DS), heterozygous deletion of DiGeorge critical region gene 8 (DGCR8) causes a processing deficiency, which contributes to abnormal brain development. The DGCR8 protein is the RNA-binding partner of Drosha RNase, both essential for processing canonical pri-miRNAs. To identify an agent that can compensate reduced DGCR8 expression, we screened for metalloporphyrins that can mimic the natural DGCR8 heme cofactor. We found that Co(III) protoporphyrin IX (PPIX) stably binds DGCR8 and activates it for pri-miRNA processing in vitro and in HeLa cells. Importantly, treating cultured Dgcr8(+/-) mouse neurons with Co(III)PPIX can compensate the pri-miRNA processing defects. Co(III)PPIX is effective at concentrations as low as 0.2 μM and is not degraded by heme degradation enzymes, making it useful as a research tool and a potential therapeutic.
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Affiliation(s)
- Ian Barr
- Department of Biological Chemistry, David Geffen School of Medicine, University of California, Los Angeles, CA 90095, USA
| | - Sara H Weitz
- Interdepartmental Program in Molecular, Cellular, and Integrative Physiology, University of California, Los Angeles, CA, 90095, USA
| | - Talia Atkin
- Department of Physiology & Cellular Biophysics, College of Physicians and Surgeons, Columbia University, New York, NY 10032, USA
| | - PeiKen Hsu
- Department of Physiology & Cellular Biophysics, College of Physicians and Surgeons, Columbia University, New York, NY 10032, USA
| | - Maria Karayiorgou
- Department of Psychiatry, College of Physicians and Surgeons, Columbia University, New York, NY 10032, USA
| | - Joseph A Gogos
- Department of Physiology & Cellular Biophysics, College of Physicians and Surgeons, Columbia University, New York, NY 10032, USA; Department of Neuroscience, College of Physicians and Surgeons, Columbia University, New York, NY 10032, USA.
| | - Shimon Weiss
- Department of Chemistry and Biochemistry, University of California, Los Angeles, CA 90095, USA; Department of Physiology, David Geffen School of Medicine, University of California, Los Angeles, CA 90095, USA
| | - Feng Guo
- Department of Biological Chemistry, David Geffen School of Medicine, University of California, Los Angeles, CA 90095, USA.
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17
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Cheng CC, Guan SS, Yang HJ, Chang CC, Luo TY, Chang J, Ho AS. Blocking heme oxygenase-1 by zinc protoporphyrin reduces tumor hypoxia-mediated VEGF release and inhibits tumor angiogenesis as a potential therapeutic agent against colorectal cancer. J Biomed Sci 2016; 23:18. [PMID: 26822586 PMCID: PMC4730655 DOI: 10.1186/s12929-016-0219-6] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2015] [Accepted: 01/11/2016] [Indexed: 01/30/2023] Open
Abstract
Background Hypoxia in tumor niche is one of important factors to start regeneration of blood vessels, leading to increase survival, proliferation, and invasion in cancer cells. Under hypoxia microenvironment, furthermore, steadily increased hypoxia-inducible factor-1α (HIF-1α) is observed, and can increase vascular endothelial growth factor (VEGF) expression and promote angiogenesis. Zinc protoporphyrin (ZnPP), a heme oxygenase-1 (HO-1) inhibitor, is potential to inhibit tumor proliferation and progression. However, the mechanism of ZnPP in inhibition of tumor is not completely clear. We hypothesize that ZnPP may modulate HIF-1α through inhibiting HO-1, and then inhibit angiogenesis and tumor progression. This study aimed to dissect the mechanism of ZnPP in tumor suppression. Results We observed the amount of VEGF was increased in the sera of the colorectal cancer (CRC) patients (n = 34, p < 0.05). Furthermore, increased VEGF expression was also measured in colorectal cancer cells, HCT-15, culturing under mimicking hypoxic condition. It suggested that hypoxia induced VEGF production from cancer cells. VEGF production was significantly reduced from HCT-15 cells after exposure to HIF-1α inhibitor KC7F2, suggesting that HIF-1α regulated VEGF production. Moreover, we observed that the HO-1inhibitor ZnPP inhibited the expressions of HIF-1α and VEGF coupled with cell proliferations of HCT-15 cells, suggesting that ZnPP blocked HIF-1α expression, and then inhibited the consequent VEGF production. In the xenograft model, we also observed that the animals exposed to ZnPP displayed much smaller tumor nodules and less degree of angiogenesis with decreased expression of the angiogenesis marker, αvβ3 integrin, compared to that in normal control. Conclusions This study demonstrated that VEGF level in serum was elevated in the patients with CRC. The HO-1 inhibitor, ZnPP, possessed the properties of anti-tumor agent by decreasing HIF-1α levels, blocking VEGF production, impairing tumor angiogenesis, and inhibiting tumor growth.
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Affiliation(s)
- Chun-Chia Cheng
- Institute of Nuclear Energy Research, Atomic Energy Council, Taoyuan, Taiwan.,Institute of Clinical Medicine, National Yang-Ming University, Taipei, Taiwan
| | - Siao-Syun Guan
- Institute of Nuclear Energy Research, Atomic Energy Council, Taoyuan, Taiwan
| | - Hao-Jhih Yang
- Institute of Nuclear Energy Research, Atomic Energy Council, Taoyuan, Taiwan
| | - Chun-Chao Chang
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, Taipei Medical University Hospital, Taipei, Taiwan.,Department of Internal Medicine, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
| | - Tsai-Yueh Luo
- Institute of Nuclear Energy Research, Atomic Energy Council, Taoyuan, Taiwan
| | - Jungshan Chang
- Graduate Institute of Medical Sciences, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan.
| | - Ai-Sheng Ho
- Division of Gastroenterology, Cheng Hsin General Hospital, Taipei, Taiwan. .,Nursing Department, Kang-Ning University, Taipei, Taiwan.
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18
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Abraham NG, Junge JM, Drummond GS. Translational Significance of Heme Oxygenase in Obesity and Metabolic Syndrome. Trends Pharmacol Sci 2015; 37:17-36. [PMID: 26515032 DOI: 10.1016/j.tips.2015.09.003] [Citation(s) in RCA: 106] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2015] [Revised: 09/10/2015] [Accepted: 09/17/2015] [Indexed: 01/04/2023]
Abstract
The global epidemic of obesity continues unabated with sequelae of diabetes and metabolic syndrome. This review reflects the dramatic increase in research on the role of increased expression of heme oxygenase (HO)-1/HO-2, biliverdin reductase, and HO activity on vascular disease. The HO system engages with other systems to mitigate the deleterious effects of oxidative stress in obesity and cardiovascular disease (CVD). Recent reports indicate that HO-1/HO-2 protein expression and HO activity have several important roles in hemostasis and reactive oxygen species (ROS)-dependent perturbations associated with metabolic syndrome. HO-1 protects tissue during inflammatory stress in obesity through the degradation of pro-oxidant heme and the production of carbon monoxide (CO) and bilirubin, both of which have anti-inflammatory and anti-apoptotic properties. By contrast, repression of HO-1 is associated with increases of cellular heme and inflammatory conditions including hypertension, stroke, and atherosclerosis. HO-1 is a major focus in the development of potential therapeutic strategies to reverse the clinical complications of obesity and metabolic syndrome.
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Affiliation(s)
- Nader G Abraham
- Departments of Medicine and Pharmacology, New York Medical College, School of Medicine, Valhalla, NY 10595, USA; Marshall University, Joan C. Edwards School of Medicine, Huntington, WV 25701, USA.
| | - Joshua M Junge
- Departments of Medicine and Pharmacology, New York Medical College, School of Medicine, Valhalla, NY 10595, USA
| | - George S Drummond
- Departments of Medicine and Pharmacology, New York Medical College, School of Medicine, Valhalla, NY 10595, USA
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19
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Lundvig DMS, Pennings SWC, Brouwer KM, Mtaya-Mlangwa M, Mugonzibwa E, Kuijpers-Jagtman AM, Wagener FADTG, Von den Hoff JW. Cytoprotective responses in HaCaT keratinocytes exposed to high doses of curcumin. Exp Cell Res 2015; 336:298-307. [PMID: 26071936 DOI: 10.1016/j.yexcr.2015.06.002] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2015] [Revised: 06/02/2015] [Accepted: 06/04/2015] [Indexed: 01/05/2023]
Abstract
Wound healing is a complex process that involves the well-coordinated interactions of different cell types. Topical application of high doses of curcumin, a plant-derived polyphenol, enhances both normal and diabetic cutaneous wound healing in rodents. For optimal tissue repair interactions between epidermal keratinocytes and dermal fibroblasts are essential. We previously demonstrated that curcumin increased reactive oxygen species (ROS) formation and apoptosis in dermal fibroblasts, which could be prevented by pre-induction of the cytoprotective enzyme heme oxygenase (HO)-1. To better understand the effects of curcumin on wound repair, we now assessed the effects of high doses of curcumin on the survival of HaCaT keratinocytes and the role of the HO system. We exposed HaCaT keratinocytes to curcumin in the presence or absence of the HO-1 inducers heme (FePP) and cobalt protoporphyrin (CoPP). We then assessed cell survival, ROS formation, and caspase activation. Curcumin induced caspase-dependent apoptosis in HaCaT keratinocytes via a ROS-dependent mechanism. Both FePP and CoPP induced HO-1 expression, but only FePP protected against curcumin-induced ROS formation and caspase-mediated apoptosis. In the presence of curcumin, FePP but not CoPP induced the expression of the iron scavenger ferritin. Together, our data show that the induction of ferritin, but not HO, protects HaCaT keratinocytes against cytotoxic doses of curcumin. The differential response of fibroblasts and keratinocytes to high curcumin doses may provide the basis for improving curcumin-based wound healing therapies.
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Affiliation(s)
- Ditte M S Lundvig
- Department of Orthodontics and Craniofacial Biology, Radboud Institute for Molecular Life Sciences, Radboud university medical center, PO Box 9101, 6500 HB Nijmegen, The Netherlands
| | - Sebastiaan W C Pennings
- Department of Orthodontics and Craniofacial Biology, Radboud Institute for Molecular Life Sciences, Radboud university medical center, PO Box 9101, 6500 HB Nijmegen, The Netherlands
| | - Katrien M Brouwer
- Department of Orthodontics and Craniofacial Biology, Radboud Institute for Molecular Life Sciences, Radboud university medical center, PO Box 9101, 6500 HB Nijmegen, The Netherlands
| | - Matilda Mtaya-Mlangwa
- Department of Preventive and Community Dentistry, Muhimbili University of Health and Allied Sciences, Dar es Salaam, Tanzania
| | - Emeria Mugonzibwa
- Department of Preventive and Community Dentistry, Muhimbili University of Health and Allied Sciences, Dar es Salaam, Tanzania
| | - Anne Marie Kuijpers-Jagtman
- Department of Orthodontics and Craniofacial Biology, Radboud Institute for Molecular Life Sciences, Radboud university medical center, PO Box 9101, 6500 HB Nijmegen, The Netherlands
| | - Frank A D T G Wagener
- Department of Orthodontics and Craniofacial Biology, Radboud Institute for Molecular Life Sciences, Radboud university medical center, PO Box 9101, 6500 HB Nijmegen, The Netherlands
| | - Johannes W Von den Hoff
- Department of Orthodontics and Craniofacial Biology, Radboud Institute for Molecular Life Sciences, Radboud university medical center, PO Box 9101, 6500 HB Nijmegen, The Netherlands.
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20
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Niu L, Li Y, Li Q. Medicinal properties of organotin compounds and their limitations caused by toxicity. Inorganica Chim Acta 2014. [DOI: 10.1016/j.ica.2014.05.007] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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21
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Wong RJ, Schulz S, Espadas C, Vreman HJ, Rajadas J, Stevenson DK. Effects of light on metalloporphyrin-treated newborn mice. Acta Paediatr 2014; 103:474-9. [PMID: 24417721 DOI: 10.1111/apa.12554] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/04/2013] [Revised: 12/13/2013] [Accepted: 01/08/2014] [Indexed: 11/28/2022]
Abstract
UNLABELLED Zinc protoporphyrin (ZnPP) is a promising metalloporphyrin with sufficient potency, but has poor solubility and is not absorbed well orally. Intragastric administration of ZnPP microparticles (30 μmol/kg) to 3-day-old mice resulted in a twofold increase in potency and no signs of phototoxicity. CONCLUSION The use of polymeric particulate delivery systems can improve the stability and enhance intestinal absorption of ZnPP, while retaining HO inhibitory potency without photosensitising effects, and thus is potentially useful in treating neonatal hyperbilirubinemia.
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Affiliation(s)
- Ronald J. Wong
- Division of Neonatal and Developmental Medicine; Department of Pediatrics; Stanford University School of Medicine; Stanford CA USA
| | - Stephanie Schulz
- Division of Neonatal and Developmental Medicine; Department of Pediatrics; Stanford University School of Medicine; Stanford CA USA
| | - Cecilia Espadas
- Biomaterials and Advanced Drug Delivery (BioADD) Laboratory; Stanford University School of Medicine; Stanford CA USA
| | - Hendrik J. Vreman
- Division of Neonatal and Developmental Medicine; Department of Pediatrics; Stanford University School of Medicine; Stanford CA USA
| | - Jayakumar Rajadas
- Biomaterials and Advanced Drug Delivery (BioADD) Laboratory; Stanford University School of Medicine; Stanford CA USA
| | - David K. Stevenson
- Division of Neonatal and Developmental Medicine; Department of Pediatrics; Stanford University School of Medicine; Stanford CA USA
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Kusmic C, Barsanti C, Matteucci M, Vesentini N, Pelosi G, Abraham NG, L'Abbate A. Up-regulation of heme oxygenase-1 after infarct initiation reduces mortality, infarct size and left ventricular remodeling: experimental evidence and proof of concept. J Transl Med 2014; 12:89. [PMID: 24708733 PMCID: PMC4022338 DOI: 10.1186/1479-5876-12-89] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2013] [Accepted: 03/27/2014] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Up-regulation of HO-1 by genetic manipulation or pharmacological pre-treatment has been reported to provide benefits in several animal models of myocardial infarction (MI). However, its efficacy following MI initiation (as in clinical reality) remains to be tested. Therefore, this study investigated whether HO-1 over-expression, by cobalt protoporphyrin (CoPP) administered after LAD ligation, is still able to improve functional and structural changes in left ventricle (LV) in a rat model of 4-week MI. METHODS A total of 144 adult male Wistar rats were subjected to either left anterior coronary artery ligation or sham-operation. The effect of CoPP treatment (5 mg/kg i.p. at the end of the surgical session and, then, once a week for 4 weeks) was evaluated on the basis of survival, electro- and echocardiography, plasma levels of B-type natriuretic peptide (BNP), endothelin-1 and prostaglandin E2, coronary microvascular reactivity, MI size, LV wall thickness and vascularity. Besides, the expression of HO-1 and connexin-43 in different LV territories was assessed by western blot analysis and immunohistochemistry, respectively. RESULTS CoPP induced an increased expression of HO-1 protein with >16 h delay. CoPP treatment significantly reduced mortality, MI size, BNP concentration, ECG alterations, LV dysfunction, microvascular constriction, capillary rarefaction and restored connexin-43 expression as compared to untreated MI. These functional and structural changes were paralleled by increased HO-1 expression in all LV territories. HO activity inhibition by tin-mesoporphyrin abolished the differences between CoPP-treated and untreated MI animals. CONCLUSIONS This is the first report demonstrating the putative role of pharmacological induction of HO-1 following coronary occlusion to benefit infarcted and remote territories, leading to better cardiac function in a 4-week MI outcome.
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Affiliation(s)
- Claudia Kusmic
- CNR Institute of Clinical Physiology, Via G Moruzzi 1, 56124 Pisa, Italy.
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23
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Leung TH, Zhang LF, Wang J, Ning S, Knox SJ, Kim SK. Topical hypochlorite ameliorates NF-κB-mediated skin diseases in mice. J Clin Invest 2013; 123:5361-70. [PMID: 24231355 DOI: 10.1172/jci70895] [Citation(s) in RCA: 79] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2013] [Accepted: 09/12/2013] [Indexed: 11/17/2022] Open
Abstract
Nuclear factor-κB (NF-κB) regulates cellular responses to inflammation and aging, and alterations in NF-κB signaling underlie the pathogenesis of multiple human diseases. Effective clinical therapeutics targeting this pathway remain unavailable. In primary human keratinocytes, we found that hypochlorite (HOCl) reversibly inhibited the expression of CCL2 and SOD2, two NF-κB-dependent genes. In cultured cells, HOCl inhibited the activity of inhibitor of NF-κB kinase (IKK), a key regulator of NF-κB activation, by oxidizing cysteine residues Cys114 and Cys115. In NF-κB reporter mice, topical HOCl reduced LPS-induced NF-κB signaling in skin. We further evaluated topical HOCl use in two mouse models of NF-κB-driven epidermal disease. For mice with acute radiation dermatitis, topical HOCl inhibited the expression of NF-κB-dependent genes, decreased disease severity, and prevented skin ulceration. In aged mice, topical HOCl attenuated age-dependent production of p16INK4a and expression of the DNA repair gene Rad50. Additionally, skin of aged HOCl-treated mice acquired enhanced epidermal thickness and proliferation, comparable to skin in juvenile animals. These data suggest that topical HOCl reduces NF-κB-mediated epidermal pathology in radiation dermatitis and skin aging through IKK modulation and motivate the exploration of HOCl use for clinical aims.
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Heme oxygenase-1 protects regulatory T cells from hypoxia-induced cellular stress in an experimental mouse brain tumor model. J Neuroimmunol 2013; 266:33-42. [PMID: 24268287 DOI: 10.1016/j.jneuroim.2013.10.012] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2013] [Revised: 10/25/2013] [Accepted: 10/31/2013] [Indexed: 12/31/2022]
Abstract
Two characteristic features of malignant gliomas (MG) are the presence of hypoxia and accumulation of regulatory T cells (Tregs). Heme-oxygenase-1 (HO1) is a cytoprotective enzyme expressed in high level by Tregs in glioma. In this study, we show that higher HO1 expression in Tregs is associated with increased survival under hypoxic conditions and that HO1 inhibitor, tin protoporphyrin (SnPP), abrogates the survival benefits. Moreover, SnPP preferentially eliminates Tregs and treatment with SnPP of tumor bearing mice significantly increases survival (23 to 31days (p<0.05)). Thus HO1 inhibition provides another alternative way of therapeutically targeting Tregs in MG.
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25
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Parayil SK, Lee J, Yoon M. Highly fluorescent peptide nanoribbon impregnated with Sn-porphyrin as a potent DNA sensor. Photochem Photobiol Sci 2013; 12:798-804. [PMID: 23354524 DOI: 10.1039/c3pp25337f] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Highly fluorescent and thermo-stable peptide nanoribbons (PNRs) were fabricated by solvothermal self-assembly of a single peptide (D,D-diphenyl alanine peptides) with Sn-porphyrin (trans-dihydroxo[5,10,15,20-tetrakis(p-tolyl)porphyrinato] Sn(IV) (SnTTP(OH)2)). The structural characterization of the as-prepared nanoribbons was performed by transmitting electron microscopy (TEM), scanning electron microscopy (SEM) and atomic force microscopy (AFM), FT-IR and Raman spectroscopy, indicating that the lipophilic Sn-porphyrins are impregnated into the porous surface formed in the process of nanoribbon formation through intermolecular hydrogen bonding of the peptide main chains. Consequently the Sn-porphyrin-impregnated peptide nanoribbons (Sn-porphyrin-PNRs) exhibited typical UV-visible absorption spectrum of the monomer porphyrin with a red shifted Q-band, and their fluorescence quantum yield was observed to be enhanced compared to that of free Sn-porphyrin. Interestingly the fluorescence intensity and lifetimes of Sn-porphyrin-PNRs were selectively affected upon interaction with nucleotide base sequences of DNA while those of free Sn-porphyrins were not affected by binding with any of the DNA studied, indicating that DNA-induced changes in the fluorescence properties of Sn-porphyrin-PNRs are due to interaction between DNA and the PNR scaffold. These results imply that Sn-porphyrin-PNR will be useful as a potent fluorescent protein analogue and as a biocompatible DNA sensor.
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Affiliation(s)
- Sreenivasan Koliyat Parayil
- Molecular/Nano Photochemistry and Photonics Laboratory, Department of Chemistry, Chungnam National University, Daehak-ro, Yuseong-gu, Daejeon, 305-764, Republic of Korea
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Bonnamain V, Mathieux E, Thinard R, Thébault P, Nerrière-Daguin V, Lévêque X, Anegon I, Vanhove B, Neveu I, Naveilhan P. Expression of heme oxygenase-1 in neural stem/progenitor cells as a potential mechanism to evade host immune response. Stem Cells 2013; 30:2342-53. [PMID: 22888011 DOI: 10.1002/stem.1199] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Besides their therapeutic benefit as cell source, neural stem/progenitor cells (NSPCs) exhibit immunosuppressive properties of great interest for modulating immune response in the central nervous system. To decipher the mechanisms of NSPC-mediated immunosuppression, activated T cells were exposed to NSPCs isolated from fetal rat brains. Analyses revealed that NSPCs inhibited T-cell proliferation and interferon-gamma production in a dose-dependent manner. A higher proportion of helper T cells (CD4+ T cells) was found in the presence of NSPCs, but analyses of FoxP3 population indicated that T-cell suppression was not secondary to an induction of suppressive regulatory T cells (FoxP3+ CD4+ CD25+). Conversely, induction of the high affinity interleukin-2 (IL-2) receptor (CD25) and the inability of IL-2 to rescue T-cell proliferation suggest that NSPCs display immunosuppressive activity without affecting T-cell activation. Cultures in Transwell chambers or addition of NSPC-conditioned medium to activated T cells indicated that part of the suppressive activity was not contact dependent. We therefore searched for soluble factors that mediate NSPC immunosuppression. We found that NSPCs express several immunosuppressive molecules, but the ability of these cells to inhibit T-cell proliferation was only counteracted by heme oxygenase (HO) inhibitors in association or not with nitric oxide synthase inhibitors. Taken together, our findings highlight a dynamic crosstalk between NSPCs and T lymphocytes and provide the first evidence of an implication of HO-1 in mediating the immunosuppressive effects of the NSPCs.
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Deng R, Wang SM, Yin T, Ye TH, Shen GB, Li L, Zhao JY, Sang YX, Duan XG, Wei YQ. Inhibition of Tumor Growth and Alteration of Associated Macrophage Cell Type by an HO-1 Inhibitor in Breast Carcinoma-Bearing Mice. Oncol Res 2012; 20:473-82. [PMID: 24308158 DOI: 10.3727/096504013x13715991125684] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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28
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Schulz S, Wong RJ, Vreman HJ, Stevenson DK. Metalloporphyrins - an update. Front Pharmacol 2012; 3:68. [PMID: 22557967 PMCID: PMC3337460 DOI: 10.3389/fphar.2012.00068] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2012] [Accepted: 04/03/2012] [Indexed: 11/13/2022] Open
Abstract
Metalloporphyrins are structural analogs of heme and their potential use in the management of neonatal hyperbilirubinemia has been the subject of considerable research for more than three decades. The pharmacological basis for using this class of compounds to control bilirubin levels is the targeted blockade of bilirubin production through the competitive inhibition of heme oxygenase (HO), the rate-limiting enzyme in the bilirubin production pathway. Ongoing research continues in the pursuit of identifying ideal metalloporphyrins, which are safe and effective, by defining therapeutic windows and targeted interventions for the treatment of excessive neonatal hyperbilirubinemia.
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Affiliation(s)
- Stephanie Schulz
- Division of Neonatal and Developmental Medicine, Department of Pediatrics, Stanford University School of Medicine Stanford, CA, USA
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Walther M, De Caul A, Aka P, Njie M, Amambua-Ngwa A, Walther B, Predazzi IM, Cunnington A, Deininger S, Takem EN, Ebonyi A, Weis S, Walton R, Rowland-Jones S, Sirugo G, Williams SM, Conway DJ. HMOX1 gene promoter alleles and high HO-1 levels are associated with severe malaria in Gambian children. PLoS Pathog 2012; 8:e1002579. [PMID: 22438807 PMCID: PMC3305414 DOI: 10.1371/journal.ppat.1002579] [Citation(s) in RCA: 72] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2011] [Accepted: 01/26/2012] [Indexed: 01/16/2023] Open
Abstract
Heme oxygenase 1 (HO-1) is an essential enzyme induced by heme and multiple stimuli associated with critical illness. In humans, polymorphisms in the HMOX1 gene promoter may influence the magnitude of HO-1 expression. In many diseases including murine malaria, HO-1 induction produces protective anti-inflammatory effects, but observations from patients suggest these may be limited to a narrow range of HO-1 induction, prompting us to investigate the role of HO-1 in malaria infection. In 307 Gambian children with either severe or uncomplicated P. falciparum malaria, we characterized the associations of HMOX1 promoter polymorphisms, HMOX1 mRNA inducibility, HO-1 protein levels in leucocytes (flow cytometry), and plasma (ELISA) with disease severity. The (GT)(n) repeat polymorphism in the HMOX1 promoter was associated with HMOX1 mRNA expression in white blood cells in vitro, and with severe disease and death, while high HO-1 levels were associated with severe disease. Neutrophils were the main HO-1-expressing cells in peripheral blood, and HMOX1 mRNA expression was upregulated by heme-moieties of lysed erythrocytes. We provide mechanistic evidence that induction of HMOX1 expression in neutrophils potentiates the respiratory burst, and propose this may be part of the causal pathway explaining the association between short (GT)(n) repeats and increased disease severity in malaria and other critical illnesses. Our findings suggest a genetic predisposition to higher levels of HO-1 is associated with severe illness, and enhances the neutrophil burst leading to oxidative damage of endothelial cells. These add important information to the discussion about possible therapeutic manipulation of HO-1 in critically ill patients.
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Affiliation(s)
- Michael Walther
- Medical Research Council Laboratories, Fajara, Banjul, Gambia.
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Noh EM, Cho DH, Lee YR, Jeong YJ, Kim JH, Chae HS, Park J, Jung WS, Park SJ, Kim JS. Dimethylsulfoxide (DMSO) induces downregulation of heme oxygenase-1 (HO-1) in HL-60 cells: involvement of HO-1 in HL-60 cell differentiation. BMB Rep 2011; 44:753-7. [DOI: 10.5483/bmbrep.2011.44.11.753] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
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31
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Kawamoto S, Flynn JP, Shi Q, Sakr SW, Luo J, Allen MD. Heme oxygenase-1 induction enhances cell survival and restores contractility to unvascularized three-dimensional adult cardiomyocyte grafts implanted in vivo. Tissue Eng Part A 2011; 17:1605-14. [PMID: 21288159 DOI: 10.1089/ten.tea.2010.0447] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Autologous adult cardiomyocytes are not utilized for heart repair strategies because of their rapid apoptosis after implantation. We examined whether induction of heme oxygenase-1 (HO-1), a mediator of preconditioning, could enhance early postimplant myocyte survival. Three-dimensional 5×5 mm patches of full-thickness adult murine atrial wall, including cardiomyocytes, capillary networks, and extracellular matrix, were cultured with or without HO-1 inducer cobalt protoporphyrin (CoPP), or the HO-1 inhibitor, tin protoporphyrin (SnPP), or both. Patches were then implanted subcutaneously. Freshly procured atrial wall patches implanted without preculturing served as additional controls. By 14 days postimplant, graft cardiomyocyte content was significantly greater in CoPP-treated patches than in either control group (p<0.02). Adult cardiomyocytes did not contract in culture or immediately after implantation. However, by 14 days postimplant, spontaneous contraction had recovered in 47% of CoPP-treated patches, but in only 6% of precultured patches without CoPP, 0% of SnPP-treated patches, and 0% of uncultured patches (p<0.03). CoPP-treated adult cardiomyocyte patches were also observed to remodel spontaneously into endothelial-lined chambers that pumped nonclotting blood. These findings demonstrate that adult cardiomyocytes have more plasticity and capacity for functional recovery than previously recognized and could have application as an autologous cardiomyocyte source for tissue engineering.
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Affiliation(s)
- Shunsuke Kawamoto
- Department of Cardiovascular Surgery, Tohoku University, Sendai, Japan
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Li C, Hou A, Wang C. Electrochemical Investigation of a Tm(III)–5,10,15,20-Tetrakis(4-isopropylphenyl)porphyrin Complex Modified Glassy Carbon Electrode and its Interaction with Bovine Serum Albumin. Supramol Chem 2010. [DOI: 10.1080/1061027021000053372] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Chunya Li
- a Department of Chemistry , Wuhan University , 430072 , Wuhan , People's Republic of China
| | - Anxin Hou
- a Department of Chemistry , Wuhan University , 430072 , Wuhan , People's Republic of China
| | - Changfa Wang
- a Department of Chemistry , Wuhan University , 430072 , Wuhan , People's Republic of China
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Biburger M, Theiner G, Schädle M, Schuler G, Tiegs G. Pivotal Advance: Heme oxygenase 1 expression by human CD4+ T cells is not sufficient for their development of immunoregulatory capacity. J Leukoc Biol 2009; 87:193-202. [PMID: 19797297 DOI: 10.1189/jlb.0508280] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
HO-1 is the only inducible one of three isoenzymes that catalyzes the oxidative degradation of heme. HO-1 is inducible by various cellular stress factors and exerts cytoprotective and immunomodulatory effects. Recent publications demonstrated that HO-1 is constitutively expressed by CD4(+)CD25(+) T(regs) and induced in CD4(+)CD25(-) T cells upon FoxP3 transfection. Here, we investigated whether HO-1 was essential and sufficient for human T(regs) to exert immunosuppression in vitro. PGJ(2) induced pronounced expression of HO-1 in CD4(+)CD25(-) T cells without accompanying FoxP3 induction. Treatment of CD4(+)CD25(-) T cells with PGJ(2) decreased their proliferation, whereas the HO-1 inhibitor SnPP enhanced the proliferation of HO-1-expressing T(regs), suggesting that HO-1 may modulate the proliferative capacity of T lymphocytes. HO-1 modulation by SnPP treatment of T(regs) or PGJ(2) treatment of CD4(+)CD25(-) T cells neither suppressed nor induced immune-modulatory function in these cells, respectively, as measured by responder-cell proliferation and/or IL-2 production. In summary, these data suggest that HO-1 expression by T(regs) might contribute to their typical reluctance to proliferate but does not account independently for their suppressive functions.
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Affiliation(s)
- Markus Biburger
- Nikolaus Fiebiger Center for Molecular Medicine, Medical Department III, University Hospital of Erlangen, Germany
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Characterization of the interaction between cationic Erbium (III)–porphyrin complex with bovine serum albumin. J Mol Struct 2009. [DOI: 10.1016/j.molstruc.2009.05.037] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Ewing P, Wilke A, Eissner G, Holler E, Andreesen R, Gerbitz A. Expression of Heme Oxygenase-1 Protects Endothelial Cells from Irradiation-Induced Apoptosis. ACTA ACUST UNITED AC 2009; 12:113-9. [PMID: 16291514 DOI: 10.1080/10623320500189814] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
A common side effect of therapeutic use of ionizing irradiation is endothelial cell damage resulting in a variety of clinical complications. Thus, preservation of endothelial function after irradiation could potentially limit toxicity. Using the murine endothelioma cell line bEnd2 we show here that induction of heme oxygenase-1 (HO-1) by cobalt protoporphyrine IX (CoPP) inhibits irradiation-induced apoptosis. In contrast, HO-1 induction by tin protoporphyrine IX (SnPP), a HO-1 inhibitor, does not affect survival after irradiation. The protective effects of CoPP could be partially reversed by blockade of HO-1 function with SnPP after induction by CoPP. Vice versa, blockade of HO-1 function by SnPP was reversible using CoPP. Treatment with CoPP inhibited cytochrome c release induced by irradiation. These results demonstrate that HO-1 induction and activation prior to irradiation inhibits endothelial apoptosis and might be used for possible cell protection in vivo.
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Affiliation(s)
- P Ewing
- Department of Hematology/Oncology, University of Regensburg, Regensburg, Germany
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36
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Abstract
Heme oxygenase (HO) is important in attenuating the overall production of reactive oxygen species through its ability to degrade heme and to produce carbon monoxide, biliverdin/bilirubin, and release of free iron. Excess free heme catalyzes the formation of reactive oxygen species, which leads to endothelial cell (EC) dysfunction as seen in numerous pathologic vascular conditions including systemic hypertension and diabetes, as well as in ischemia/reperfusion injury.The up-regulation of HO-1 can be achieved through the use of pharmaceutical agents such as metalloporphyrins and statins. In addition, atrial natriuretic peptide and nitric oxide donors are important modulators of the heme-HO system, either through induction of HO-1 or the increased biologic activity of its products. Gene therapy and gene transfer, including site- and organ-specific targeted gene transfer have become powerful tools for studying the potential role of the 2 isoforms of HO, HO-1/HO-2, in the treatment of cardiovascular disease, as well as diabetes. HO-1 induction by pharmacological agents or the in vitro gene transfer of human HO-1 into ECs increases cell cycle progression and attenuates angiotensin II, tumor necrosis factor-alpha, and heme-mediated DNA damage; administration in vivo corrects blood pressure elevation after angiotensin II exposure. Delivery of human HO-1 to hyperglycemic rats significantly lowers superoxide levels and prevents EC damage and sloughing of vascular EC into the circulation. In addition, administration of human HO-1 to rats in advance of ischemia/reperfusion injury considerably reduces tissue damage.The ability to up-regulate HO-1 either through pharmacological means or through the use of gene therapy may offer therapeutic strategies for the prevention of cardiovascular disease in the future. This review discusses the implications of HO-1 delivery during the early stages of cardiovascular system injury or in early vascular pathology, and suggests that pharmacological agents that regulate HO activity or HO-1 gene delivery itself may become powerful tools for preventing the onset or progression of various cardiovascular diseases.
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Davari MD, Bahrami H, Zahedi M, Safari N. Theoretical investigations on the hydrolysis pathway of tin verdoheme complexes: elucidation of tin's ring opening inhibition role. J Mol Model 2009; 15:1299-315. [PMID: 19373497 DOI: 10.1007/s00894-009-0495-0] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2009] [Accepted: 02/25/2009] [Indexed: 12/24/2022]
Abstract
In order to obtain a better molecular understanding of inhibitory role of tin metal in the verdoheme ring opening process, hydrolysis of three possibly six, five, and four coordinate verdoheme complexes of tin(IV) and (II) have been studied using DFT method. The results of calculations indicate that, in excellent accord with experimental reports, hydrolysis of different possibly coordinated tin(IV) and (II) verdohemes does not lead to the opening of the macrocycle. Contrary to iron and zinc verdohemes, in five and four coordinate verdoheme complexes of tin(IV) and (II), formation of open ring helical complexes of tin are unfavorable both thermodynamically and kinetically. In these pathways, coordination of hydroxide nucleophile to tin metal due to the highly charged, exclusive oxophilicity nature of the Sn center, and high affinity of Sn to increase coordination state are proposed responsible as inhibiting roles of tin via the ring opening. While, in saturated six coordinate tin(IV) and (II) verdoheme complexes the ring opening of tin verdohemes is possible thermodynamically, but it is not predicted to occur from a kinetics point of view. In the six coordinate pathway, tin plays no coordination role and direct addition of hydroxide nucleophile to the positive oxo-carbon centers and formation of closed ring hydroxy compounds is proposed for preventing the verdoheme ring opening. These key points and findings have been corroborated by the results obtained from atomic charge analysis, geometrical parameters, and molecular orbital calculations. In addition, the results of inhibiting ring opening reaction of tin verdoheme complexes could support the great interest of tin porphyrin analogues as pharmacologic means of chemoprevention of neonatal jaundice by the competitive inhibitory action of tin porphyrins on heme oxygenase.
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Affiliation(s)
- Mahdi D Davari
- Department of Chemistry, Faculty of Sciences, Shahid Beheshti University, Tehran, Iran
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38
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Heme oxygenase-1: from biology to therapeutic potential. Trends Mol Med 2009; 15:50-8. [DOI: 10.1016/j.molmed.2008.12.004] [Citation(s) in RCA: 185] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2008] [Revised: 12/02/2008] [Accepted: 12/02/2008] [Indexed: 01/24/2023]
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Johns DG, Zelent D, Ao Z, Bradley BT, Cooke A, Contino L, Hu E, Douglas SA, Jaye MC. Heme-oxygenase induction inhibits arteriolar thrombosis in vivo: effect of the non-substrate inducer cobalt protoporphyrin. Eur J Pharmacol 2009; 606:109-14. [PMID: 19168058 DOI: 10.1016/j.ejphar.2008.12.030] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2008] [Revised: 12/02/2008] [Accepted: 12/18/2008] [Indexed: 11/29/2022]
Abstract
Heme oxygenase-1 (HO) metabolizes heme to form the vasodilator carbon monoxide and antioxidant biliverdin. Upregulation of HO-1 by hemin, which is also a substrate attenuates thrombosis in rodent models, however, whether protection is due to HO-1 upregulation or to increased substrate availability is unknown. This study tested the hypothesis that treatment of mice with cobalt protoporphyrin (CoPP), a non-substrate HO-1 inducer, would protect the endothelium from laser injury. C57Bl/J6 mice were treated with vehicle, CoPP (20 mg/kg), CoPP plus the HO-1 inhibitor tin protoporphyrin (SnPP; 20 mg/kg) or SnPP alone for 18 h. Intravital microscopy was used to quantitate thrombus formation in cremaster arterioles in response to laser ablation of the endothelium. CoPP treatment inhibited thrombosis by 43% compared to vehicle (P<0.05). SnPP co-treatment negated the inhibitory effect of CoPP while SnPP alone potentiated thrombosis compared to vehicle. In CoPP-treated animals, cremaster HO-1 mRNA expression was increased 59+/-17-fold over vehicle (P<0.001). Co-treatment with CoPP+SnPP attenuated this effect by 36%, however the increase in HO-1 protein induced by CoPP was unaffected by SnPP. Induction of HO-1 by the non-substrate inducer CoPP protects against laser induced endothelial injury without the need for increased substrate. Small molecule, substrate-independent upregulation of HO-1 expression represents a feasible approach to ameliorate endothelial dysfunction in cardiovascular disease.
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Affiliation(s)
- Douglas G Johns
- Department of Cardiovascular Pharmacology, Metabolic Pathways Center for Excellence in Drug Discovery, GlaxoSmithKline, King of Prussia, PA 19406, United States.
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Takahashi T, Shimizu H, Morimatsu H, Maeshima K, Inoue K, Akagi R, Matsumi M, Katayama H, Morita K. Heme Oxygenase-1 is an Essential Cytoprotective Component in Oxidative Tissue Injury Induced by Hemorrhagic Shock. J Clin Biochem Nutr 2008; 44:28-40. [PMID: 19177185 PMCID: PMC2613496 DOI: 10.3164/jcbn.08-210-ho] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2008] [Accepted: 08/27/2008] [Indexed: 01/11/2023] Open
Abstract
Hemorrhagic shock causes oxidative stress that leads to tissue injuries in various organs including the lung, liver, kidney and intestine. Excess amounts of free heme released from destabilized hemoproteins under oxidative conditions might constitute a major threat because it can catalyze the formation of reactive oxygen species. Cells counteract this by rapidly inducing the rate-limiting enzyme in heme breakdown, heme oxygenase-1 (HO-1), which is a low-molecular-weight stress protein. The enzymatic HO-1 reaction removes heme. As such, endogenous HO-1 induction by hemorrhagic shock protects tissues from further degeneration by oxidant stimuli. In addition, prior pharmacological induction of HO-1 ameliorates oxidative tissue injuries induced by hemorrhagic shock. In contrast, the deletion of HO-1 expression, or the chemical inhibition of increased HO activity ablated the beneficial effect of HO-1 induction, and exacerbates tissue damage. Thus, HO-1 constitutes an essential cytoprotective component in hemorrhagic shock-induced oxidative tissue injures. This article reviews recent advances in understanding of the essential role of HO-1 in experimental models of hemorrhagic shock-induced oxidative tissue injuries with emphasis on the role of its induction in tissue defense.
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Affiliation(s)
- Toru Takahashi
- Department of Anesthesiology and Resuscitology, Okayama University Medical School, Okayama 700-8558, Japan
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Kinobe RT, Dercho RA, Nakatsu K. Inhibitors of the heme oxygenase - carbon monoxide system: on the doorstep of the clinic? Can J Physiol Pharmacol 2008; 86:577-99. [PMID: 18758507 DOI: 10.1139/y08-066] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The past decade has seen substantial developments in our understanding of the physiology, pathology, and pharmacology of heme oxygenases (HO), to the point that investigators in the field are beginning to contemplate therapies based on administration of HO agonists or HO inhibitors. A significant amount of our current knowledge is based on the judicious application of metalloporphyrin inhibitors of HO, despite their limitations of selectivity. Recently, imidazole-based compounds have been identified as potent and more selective HO inhibitors. This 'next generation' of HO inhibitors offers a number of desirable characteristics, including isozyme selectivity, negligible effects on HO protein expression, and physicochemical properties favourable for in vivo distribution. Some of the applications of HO inhibitors that have been suggested are treatment of hyperbilirubinemia, neurodegenerative disorders, certain types of cancer, and bacterial and fungal infections. In this review, we address various approaches to altering HO activity with a focus on the potential applications of second-generation inhibitors of HO.
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Affiliation(s)
- Robert T Kinobe
- Department of Pharmacology and Toxicology, Queen's University, Kingston, ON Canada
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42
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Kurauchi Y, Hisatsune A, Isohama Y, Katsuki H. Nitric oxide-cyclic GMP signaling pathway limits inflammatory degeneration of midbrain dopaminergic neurons: cell type-specific regulation of heme oxygenase-1 expression. Neuroscience 2008; 158:856-66. [PMID: 18996444 DOI: 10.1016/j.neuroscience.2008.10.019] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2008] [Revised: 09/18/2008] [Accepted: 10/14/2008] [Indexed: 11/17/2022]
Abstract
Excessive production of nitric oxide (NO) by microglia is at least in part responsible for the pathogenesis of various neurodegenerative disorders including Parkinson disease, but at the same time NO may also play a distinct role as a signaling molecule such as an activator of soluble guanylyl cyclase. Here we investigated potential roles of the NO-soluble guanylyl cyclase-cyclic GMP signaling pathway in the regulation of dopaminergic neurodegeneration. Activation of microglia by interferon-gamma (IFN-gamma) followed by lipopolysaccharide (LPS) caused dopaminergic cell death in rat midbrain slice cultures, which was dependent on NO production. 1H-[1,2,4]oxadiazolo[4,3-a]quinoxalin-1-one (ODQ), a soluble guanylyl cyclase inhibitor, as well as KT5823, an inhibitor of cyclic GMP-dependent protein kinase, exacerbated dopaminergic cell death induced by IFN-gamma/LPS. Conversely, 8-bromo-cyclic GMP attenuated IFN-gamma/LPS cytotoxicity on dopaminergic neurons. Notably, although heme oxygenase-1 (HO-1) was expressed prominently in cells other than dopaminergic neurons in control cultures, robust expression of HO-1 was induced in surviving dopaminergic neurons challenged with IFN-gamma/LPS. ODQ and KT5823 decreased, whereas 8-bromo-cyclic GMP increased, the number of dopaminergic neurons expressing HO-1 after IFN-gamma/LPS challenge, without parallel changes in HO-1 expression in other cell populations. An NO donor 3-(4-morpholinyl)sydnonimine hydrochloride also induced HO-1 expression in dopaminergic neurons, which was abolished by ODQ and augmented by 8-bromo-cyclic GMP. Moreover, IFN-gamma/LPS-induced dopaminergic cell death was augmented by zinc protoporphyrin IX, an HO-1 inhibitor. The NO donor cytotoxicity on dopaminergic neurons was also augmented by ODQ and zinc protoporphyrin IX. These results indicate that the NO-cyclic GMP signaling pathway promotes the induction of HO-1 specifically in dopaminergic neurons, which acts as an endogenous protective system to limit inflammatory degeneration of this cell population.
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Affiliation(s)
- Y Kurauchi
- Department of Chemico-Pharmacological Sciences, Graduate School of Pharmaceutical Sciences, Kumamoto University, 5-1 Oe-honmachi, Kumamoto 862-0973, Japan
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Mashreghi MF, Klemz R, Knosalla IS, Gerstmayer B, Janssen U, Buelow R, Jozkowicz A, Dulak J, Volk HD, Kotsch K. Inhibition of Dendritic Cell Maturation and Function Is Independent of Heme Oxygenase 1 but Requires the Activation of STAT3. THE JOURNAL OF IMMUNOLOGY 2008; 180:7919-30. [DOI: 10.4049/jimmunol.180.12.7919] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Long X, Schafer AI. Inhibition of plasminogen activator inhibitor-1 expression in vascular smooth muscle cells by protoporphyrins through a heme oxygenase-independent mechanism. Mol Cell Biochem 2008; 312:93-101. [PMID: 18344023 DOI: 10.1007/s11010-008-9724-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2007] [Accepted: 02/25/2008] [Indexed: 12/01/2022]
Abstract
Heme oxygenase-1 (HO-1), a rate-limiting enzyme in heme catabolism, has been shown to play a regulatory role in the expression of plasminogen activator inhibitor-1 (PAI-1), a risk factor for vascular disease. Accordingly, we examined the effect of protoporphyrins, both HO inhibitors and activators, on PAI-1 expression in human vascular smooth muscle cells (VSMCs). Tin-protoporphyrin (SnPP) markedly inhibited the transforming growth factor beta1 (TGFbeta1)-induced expression of PAI-1 protein. Protoporphyrins, whether they are inhibitors or activators of HO, produced a similar inhibitory effect. However, SnPP had no effect on the level of PAI-1 mRNA transcripts. Knockdown of human HO-1 with a specific siRNA did not reduce the PAI-1 protein level in TGFbeta1-treated cells. In addition, the proteasome inhibitor lactacystin reversed the inhibitory effect of SnPP on PAI-1 protein expression. Both cobalt-protoporphyrin (CoPP) and CoCl2 markedly induced HO-1 expression. However, CoPP did not affect PAI-1 gene expression, whereas CoCl2 upregulated PAI-1 mRNA in a dose-dependent manner. Our results demonstrate that protoporphyrins can block the TGFbeta1-mediated induction of PAI-1 protein in VSMCs and that this inhibitory effect is independent of HO activity.
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Affiliation(s)
- Xilin Long
- Biomolecular Science Center, University of Central Florida, 4000 Central Florida Blvd., BMSC, Bldg. 20, Room 133, Orlando, FL 32816-2364, USA.
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Abstract
This review is intended to stimulate interest in the effect of increased expression of heme oxygenase-1 (HO-1) protein and increased levels of HO activity on normal and pathological states. The HO system includes the heme catabolic pathway, comprising HO and biliverdin reductase, and the products of heme degradation, carbon monoxide (CO), iron, and biliverdin/bilirubin. The role of the HO system in diabetes, inflammation, heart disease, hypertension, neurological disorders, transplantation, endotoxemia and other pathologies is a burgeoning area of research. This review focuses on the clinical potential of increased levels of HO-1 protein and HO activity to ameliorate tissue injury. The use of pharmacological and genetic probes to manipulate HO, leading to new insights into the complex relationship of the HO system with biological and pathological phenomena under investigation, is reviewed. This information is critical in both drug development and the implementation of clinical approaches to moderate and to alleviate the numerous chronic disorders in humans affected by perturbations in the HO system.
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Affiliation(s)
- Nader G Abraham
- New York Medical College, Basic Science Building, Valhalla, NY 10595, USA.
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Trigona WL, Porter CM, Horvath-Arcidiacono JA, Majumdar AS, Bloom ET. Could heme-oxygenase-1 have a role in modulating the recipient immune response to embryonic stem cells? Antioxid Redox Signal 2007; 9:751-6. [PMID: 17511591 DOI: 10.1089/ars.2007.1602] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Pluripotent human embryonic stem cells (hESCs) may provide a potential source of cellular therapies, but as allogeneic cells may require evading the recipient's immune response. Using an NIH-registry hESC line, it was found that undifferentiated hESCs induce a reduced proliferative response compared to PBMC and demonstrate that this diminished response correlates with the activity of heme oxygenase-1 (HO-1). Inhibition of HO-1 significantly increases T cell proliferation against hESC, indicating the potential suppression of these cells during transplantation of allogeneic hESC. These data suggest the hypothesis that HO-1 provides a mechanism for protecting hESCs in vivo.
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Affiliation(s)
- Wendy L Trigona
- Gene Transfer and Immunogenicity Branch, Division of Cellular and Gene Therapies, Office of Cell, Gene, and Tissue Therapy, Center for Biologics Evaluation and Research, United States Food and Drug Administration, Bethesda, Maryland 20892, USA
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Takahashi T, Shimizu H, Akagi R, Morita K, Sassa S. Heme oxygenase-1: a new drug target in oxidative tissue injuries in critically ill conditions. Drug Dev Res 2006. [DOI: 10.1002/ddr.20073] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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Srisook K, Han SS, Choi HS, Li MH, Ueda H, Kim C, Cha YN. CO from enhanced HO activity or from CORM-2 inhibits both O2- and NO production and downregulates HO-1 expression in LPS-stimulated macrophages. Biochem Pharmacol 2005; 71:307-18. [PMID: 16329999 DOI: 10.1016/j.bcp.2005.10.042] [Citation(s) in RCA: 114] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2005] [Revised: 10/21/2005] [Accepted: 10/21/2005] [Indexed: 11/21/2022]
Abstract
Carbon monoxide (CO) arising from heme degradation, catalyzed particularly by the stress-inducible heme oxygenase-1 (HO-1), has recently been demonstrated to provide cytoprotection against cell death in macrophages stimulated with bacterial lipopolysaccharide (LPS). In the present study, we determined the effects of CO on the production of reactive oxygen species (ROS) and nitric oxide (NO) by the LPS-stimulated RAW 264.7 macrophages. In addition, effect of CO-exposure on the production of superoxide (O(2)(-)) in the phorbol myristate acetate (PMA)-stimulated PLB-985 neutrophils was determined. Production of ROS by the LPS-stimulated macrophages pretreated with 50microM [Ru(CO)(3)Cl(2)](2), a CO-releasing molecule (CORM-2), was abolished and the production of O(2)(-) by the PMA-stimulated neutrophils pretreated with the CORM-2 was decreased markedly. The CORM-2 (50microM) was not cytotoxic to both the unstimulated and LPS-stimulated macrophages when determined by employing mitochondrial reductase function test (MTT assay). In macrophages pretreated with increasing doses of CORM-2, both the LPS-derived upregulations of iNOS (NO production) and HO-1 expression (CO production) were suppressed in a dose-dependent manner. Alternatively, when the macrophages were treated with LPS and CO-donor together, the LPS-derived increase in NO production was decreased. Conversely, when the control and LPS-stimulated macrophages were treated with zinc protoporphyrin IX (ZnPP) to inhibit the HO activity blocking endogenous production of CO (basal and enhanced), macrophages died extensively. Interestingly, production of NO in the LPS-stimulated macrophages increased significantly following the ZnPP treatment. Addition of CORM-2 to the LPS-treated cells that were being treated additionally with ZnPP did not prevent the cell death. However, endogenous overproduction of CO by super-induction of HO-1 (obtained by pretreatment of macrophages with either buthionine sulfoximine or hemin) decreased the LPS-derived iNOS expression without affecting cell survival. Combined, these results indicated that enhanced HO activity is essential for the survival of LPS-stimulated macrophages. Thus, upregulation of HO-1 and overproduction of CO may allow the survival of LPS-stimulated macrophages; first, by eliminating the free heme to prevent Fenton reaction, second, by limiting the availability of free heme required for induction of NO-producing heme enzyme (i.e., iNOS), third, by limiting additional production of O(2)(-) and NO via CO-derived inhibition on the activities of heme enzymes like NADPH oxidase and iNOS, respectively. CO may allow the LPS-activated macrophages to return back to the normal quiet state insensitive to additional stimuli causing oxidative stress.
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Affiliation(s)
- Klaokwan Srisook
- Department of Pharmacology and Toxicology, College of Medicine, Inha University, Incheon 400-712, Republic of Korea
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Chauveau C, Rémy S, Royer PJ, Hill M, Tanguy-Royer S, Hubert FX, Tesson L, Brion R, Beriou G, Gregoire M, Josien R, Cuturi MC, Anegon I. Heme oxygenase-1 expression inhibits dendritic cell maturation and proinflammatory function but conserves IL-10 expression. Blood 2005; 106:1694-702. [PMID: 15920011 DOI: 10.1182/blood-2005-02-0494] [Citation(s) in RCA: 269] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Heme oxygenase-1 (HO-1) is an intracellular enzyme that degrades heme and inhibits immune responses and inflammation in vivo. In most cell types, HO-1 is inducible by inflammatory stimuli and oxidative stress. Here we demonstrate that human monocyte-derived immature dendritic cells (iDCs) and several but not all freshly isolated rat splenic DC subsets and rat bone marrow-derived iDCs, spontaneously express HO-1. HO-1 expression drastically decreases during human and rat DC maturation induced in vitro. In human tissues, iDCs also express HO-1, whereas mature DCs do not. Induction of HO-1 expression with cobalt protoporphyrin (CoPP) in human and rat DCs inhibits lipopolysaccharide (LPS)-induced phenotypic maturation and secretion of proinflammatory cytokines, resulting in the inhibition of alloreactive T-cell proliferation. CoPP-treated DCs, however, retain the ability to produce the anti-inflammatory cytokine interleukin 10 (IL-10). Reactive oxygen species induced by LPS in DCs were inhibited by induction of HO-1. In conclusion, we identify, for the first time, the capacity of HO-1 to block maturation of DCs and to inhibit proinflammatory and allogeneic immune responses while preserving IL-10 production. This novel immune function for HO-1 may be of interest for the inhibition of immune responses in autoimmune diseases, transplantation, and other conditions involving activation of the immune system.
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Affiliation(s)
- Christine Chauveau
- INSERM U643, CHRU Nantes, 30 boulevard Jean Monnet, 44093 Nantes, France
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Kumar S, Bandyopadhyay U. Free heme toxicity and its detoxification systems in human. Toxicol Lett 2005; 157:175-88. [PMID: 15917143 DOI: 10.1016/j.toxlet.2005.03.004] [Citation(s) in RCA: 580] [Impact Index Per Article: 30.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2004] [Revised: 03/11/2005] [Accepted: 03/14/2005] [Indexed: 11/16/2022]
Abstract
Severe hemolysis or myolysis occurring during pathological states, such as sickle cell disease, ischemia reperfusion, and malaria results in high levels of free heme, causing undesirable toxicity leading to organ, tissue, and cellular injury. Free heme catalyzes the oxidation, covalent cross-linking and aggregate formation of protein and its degradation to small peptides. It also catalyzes the formation of cytotoxic lipid peroxide via lipid peroxidation and damages DNA through oxidative stress. Heme being a lipophilic molecule intercalates in the membrane and impairs lipid bilayers and organelles, such as mitochondria and nuclei, and destabilizes the cytoskeleton. Heme is a potent hemolytic agent and alters the conformation of cytoskeletal protein in red cells. Free heme causes endothelial cell injury, leading to vascular inflammatory disorders and stimulates the expression of intracellular adhesion molecules. Heme acts as a pro-inflammatory molecule and heme-induced inflammation is involved in the pathology of diverse conditions; such as renal failure, arteriosclerosis, and complications after artificial blood transfusion, peritoneal endometriosis, and heart transplant failure. Heme offers severe toxic effects to kidney, liver, central nervous system and cardiac tissue. Although heme oxygenase is primarily responsible to detoxify free heme but other extra heme oxygenase systems also play a significant role to detoxify heme. A brief account of free heme toxicity and its detoxification systems along with mechanistic details are presented.
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Affiliation(s)
- Sanjay Kumar
- Division of Drug Target Discovery and Development, Central Drug Research Institute, Chatter Manzil Palace, Mahatma Gandhi Marg, Lucknow 226001, Uttar Pradesh, India
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