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Ma Q, Zhang Z, Shim JK, Venkatraman TN, Lascola CD, Quinones QJ, Mathew JP, Terrando N, Podgoreanu MV. Annexin A1 Bioactive Peptide Promotes Resolution of Neuroinflammation in a Rat Model of Exsanguinating Cardiac Arrest Treated by Emergency Preservation and Resuscitation. Front Neurosci 2019; 13:608. [PMID: 31258464 PMCID: PMC6587399 DOI: 10.3389/fnins.2019.00608] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2019] [Accepted: 05/28/2019] [Indexed: 12/19/2022] Open
Abstract
Neuroinflammation initiated by damage-associated molecular patterns, including high mobility group box 1 protein (HMGB1), has been implicated in adverse neurological outcomes following lethal hemorrhagic shock and polytrauma. Emergency preservation and resuscitation (EPR) is a novel method of resuscitation for victims of exsanguinating cardiac arrest, shown in preclinical studies to improve survival with acceptable neurological recovery. Sirtuin 3 (SIRT3), the primary mitochondrial deacetylase, has emerged as a key regulator of metabolic and energy stress response pathways in the brain and a pharmacological target to induce a neuronal pro-survival phenotype. This study aims to examine whether systemic administration of an Annexin-A1 bioactive peptide (ANXA1sp) could resolve neuroinflammation and induce sirtuin-3 regulated cytoprotective pathways in a novel rat model of exsanguinating cardiac arrest and EPR. Adult male rats underwent hemorrhagic shock and ventricular fibrillation, induction of profound hypothermia, followed by resuscitation and rewarming using cardiopulmonary bypass (EPR). Animals randomly received ANXA1sp (3 mg/kg, in divided doses) or vehicle. Neuroinflammation (HMGB1, TNFα, IL-6, and IL-10 levels), cerebral cell death (TUNEL, caspase-3, pro and antiapoptotic protein levels), and neurologic scores were assessed to evaluate the inflammation resolving effects of ANXA1sp following EPR. Furthermore, western blot analysis and immunohistochemistry were used to interrogate the mechanisms involved. Compared to vehicle controls, ANXA1sp effectively reduced expression of cerebral HMGB1, IL-6, and TNFα and increased IL-10 expression, which were associated with improved neurological scores. ANXA1sp reversed EPR-induced increases in expression of proapoptotic protein Bax and reduction in antiapoptotic protein Bcl-2, with a corresponding decrease in cerebral levels of cleaved caspase-3. Furthermore, ANXA1sp induced autophagic flux (increased LC3II and reduced p62 expression) in the brain. Mechanistically, these findings were accompanied by upregulation of the mitochondrial protein deacetylase Sirtuin-3, and its downstream targets FOXO3a and MnSOD in ANXA1sp-treated animals. Our data provide new evidence that engaging pro-resolving pharmacological strategies such as Annexin-A1 biomimetic peptides can effectively attenuate neuroinflammation and enhance the neuroprotective effects of EPR after exsanguinating cardiac arrest.
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Affiliation(s)
- Qing Ma
- Systems Modeling of Perioperative Organ Injury Laboratory, Department of Anesthesiology, Duke University, Durham, NC, United States
| | - Zhiquan Zhang
- Neuroinflammation and Cognitive Outcomes Laboratory, Department of Anesthesiology, Duke University, Durham, NC, United States.,Center for Translational Pain Medicine, Duke University, Durham, NC, United States
| | - Jae-Kwang Shim
- Department of Anesthesiology and Pain Medicine, Yonsei University College of Medicine, Seoul, South Korea
| | | | - Christopher D Lascola
- Departments of Radiology and Neurobiology, Duke University, Durham, NC, United States.,Duke-UNC Brain Imaging and Analysis Center, Duke University, Durham, NC, United States
| | - Quintin J Quinones
- Systems Modeling of Perioperative Organ Injury Laboratory, Department of Anesthesiology, Duke University, Durham, NC, United States
| | - Joseph P Mathew
- Department of Anesthesiology, Duke University, Durham, NC, United States
| | - Niccolò Terrando
- Neuroinflammation and Cognitive Outcomes Laboratory, Department of Anesthesiology, Duke University, Durham, NC, United States.,Center for Translational Pain Medicine, Duke University, Durham, NC, United States
| | - Mihai V Podgoreanu
- Systems Modeling of Perioperative Organ Injury Laboratory, Department of Anesthesiology, Duke University, Durham, NC, United States
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McClung JM, McCord TJ, Ryan TE, Schmidt CA, Green TD, Southerland KW, Reinardy JL, Mueller SB, Venkatraman TN, Lascola CD, Keum S, Marchuk DA, Spangenburg EE, Dokun A, Annex BH, Kontos CD. BAG3 (Bcl-2-Associated Athanogene-3) Coding Variant in Mice Determines Susceptibility to Ischemic Limb Muscle Myopathy by Directing Autophagy. Circulation 2017; 136:281-296. [PMID: 28442482 PMCID: PMC5537727 DOI: 10.1161/circulationaha.116.024873] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/05/2016] [Accepted: 04/14/2017] [Indexed: 12/22/2022]
Abstract
BACKGROUND Critical limb ischemia is a manifestation of peripheral artery disease that carries significant mortality and morbidity risk in humans, although its genetic determinants remain largely unknown. We previously discovered 2 overlapping quantitative trait loci in mice, Lsq-1 and Civq-1, that affected limb muscle survival and stroke volume after femoral artery or middle cerebral artery ligation, respectively. Here, we report that a Bag3 variant (Ile81Met) segregates with tissue protection from hind-limb ischemia. METHODS We treated mice with either adeno-associated viruses encoding a control (green fluorescent protein) or 2 BAG3 (Bcl-2-associated athanogene-3) variants, namely Met81 or Ile81, and subjected the mice to hind-limb ischemia. RESULTS We found that the BAG3 Ile81Met variant in the C57BL/6 (BL6) mouse background segregates with protection from tissue necrosis in a shorter congenic fragment of Lsq-1 (C.B6-Lsq1-3). BALB/c mice treated with adeno-associated virus encoding the BL6 BAG3 variant (Ile81; n=25) displayed reduced limb-tissue necrosis and increased limb tissue perfusion compared with Met81- (n=25) or green fluorescent protein- (n=29) expressing animals. BAG3Ile81, but not BAG3Met81, improved ischemic muscle myopathy and muscle precursor cell differentiation and improved muscle regeneration in a separate, toxin-induced model of injury. Systemic injection of adeno-associated virus-BAG3Ile81 (n=9), but not BAG3Met81 (n=10) or green fluorescent protein (n=5), improved ischemic limb blood flow and limb muscle histology and restored muscle function (force production). Compared with BAG3Met81, BAG3Ile81 displayed improved binding to the small heat shock protein (HspB8) in ischemic skeletal muscle cells and enhanced ischemic muscle autophagic flux. CONCLUSIONS Taken together, our data demonstrate that genetic variation in BAG3 plays an important role in the prevention of ischemic tissue necrosis. These results highlight a pathway that preserves tissue survival and muscle function in the setting of ischemia.
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Affiliation(s)
- Joseph M McClung
- From Department of Physiology and Diabetes and Obesity Institute, East Carolina University, Brody School of Medicine, Greenville, NC (J.M.M., T.E.R., C.A.S., T.D.G., E.E.S); Department of Medicine, Division of Cardiology (T.J.M., J.L.R., S.B.M., C.D.K.), Department of Surgery, Division of General Surgery (K.W.S.), Department of Pharmacology and Cancer Biology (J.L.R., S.B.M., C.D.K.), Department of Radiology (T.N.V., C.D.L.), and Department of Molecular Genetics and Microbiology (S.K., D.A.M.), Duke University Medical Center, Durham, NC; and Department of Medicine, Division of Endocrinology (A.D., B.H.A.), Division of Cardiovascular Medicine (B.H.A.), and Robert M. Berne Cardiovascular Research Center (B.H.A.), University of Virginia School of Medicine, Charlottesville.
| | - Timothy J McCord
- From Department of Physiology and Diabetes and Obesity Institute, East Carolina University, Brody School of Medicine, Greenville, NC (J.M.M., T.E.R., C.A.S., T.D.G., E.E.S); Department of Medicine, Division of Cardiology (T.J.M., J.L.R., S.B.M., C.D.K.), Department of Surgery, Division of General Surgery (K.W.S.), Department of Pharmacology and Cancer Biology (J.L.R., S.B.M., C.D.K.), Department of Radiology (T.N.V., C.D.L.), and Department of Molecular Genetics and Microbiology (S.K., D.A.M.), Duke University Medical Center, Durham, NC; and Department of Medicine, Division of Endocrinology (A.D., B.H.A.), Division of Cardiovascular Medicine (B.H.A.), and Robert M. Berne Cardiovascular Research Center (B.H.A.), University of Virginia School of Medicine, Charlottesville
| | - Terence E Ryan
- From Department of Physiology and Diabetes and Obesity Institute, East Carolina University, Brody School of Medicine, Greenville, NC (J.M.M., T.E.R., C.A.S., T.D.G., E.E.S); Department of Medicine, Division of Cardiology (T.J.M., J.L.R., S.B.M., C.D.K.), Department of Surgery, Division of General Surgery (K.W.S.), Department of Pharmacology and Cancer Biology (J.L.R., S.B.M., C.D.K.), Department of Radiology (T.N.V., C.D.L.), and Department of Molecular Genetics and Microbiology (S.K., D.A.M.), Duke University Medical Center, Durham, NC; and Department of Medicine, Division of Endocrinology (A.D., B.H.A.), Division of Cardiovascular Medicine (B.H.A.), and Robert M. Berne Cardiovascular Research Center (B.H.A.), University of Virginia School of Medicine, Charlottesville
| | - Cameron A Schmidt
- From Department of Physiology and Diabetes and Obesity Institute, East Carolina University, Brody School of Medicine, Greenville, NC (J.M.M., T.E.R., C.A.S., T.D.G., E.E.S); Department of Medicine, Division of Cardiology (T.J.M., J.L.R., S.B.M., C.D.K.), Department of Surgery, Division of General Surgery (K.W.S.), Department of Pharmacology and Cancer Biology (J.L.R., S.B.M., C.D.K.), Department of Radiology (T.N.V., C.D.L.), and Department of Molecular Genetics and Microbiology (S.K., D.A.M.), Duke University Medical Center, Durham, NC; and Department of Medicine, Division of Endocrinology (A.D., B.H.A.), Division of Cardiovascular Medicine (B.H.A.), and Robert M. Berne Cardiovascular Research Center (B.H.A.), University of Virginia School of Medicine, Charlottesville
| | - Tom D Green
- From Department of Physiology and Diabetes and Obesity Institute, East Carolina University, Brody School of Medicine, Greenville, NC (J.M.M., T.E.R., C.A.S., T.D.G., E.E.S); Department of Medicine, Division of Cardiology (T.J.M., J.L.R., S.B.M., C.D.K.), Department of Surgery, Division of General Surgery (K.W.S.), Department of Pharmacology and Cancer Biology (J.L.R., S.B.M., C.D.K.), Department of Radiology (T.N.V., C.D.L.), and Department of Molecular Genetics and Microbiology (S.K., D.A.M.), Duke University Medical Center, Durham, NC; and Department of Medicine, Division of Endocrinology (A.D., B.H.A.), Division of Cardiovascular Medicine (B.H.A.), and Robert M. Berne Cardiovascular Research Center (B.H.A.), University of Virginia School of Medicine, Charlottesville
| | - Kevin W Southerland
- From Department of Physiology and Diabetes and Obesity Institute, East Carolina University, Brody School of Medicine, Greenville, NC (J.M.M., T.E.R., C.A.S., T.D.G., E.E.S); Department of Medicine, Division of Cardiology (T.J.M., J.L.R., S.B.M., C.D.K.), Department of Surgery, Division of General Surgery (K.W.S.), Department of Pharmacology and Cancer Biology (J.L.R., S.B.M., C.D.K.), Department of Radiology (T.N.V., C.D.L.), and Department of Molecular Genetics and Microbiology (S.K., D.A.M.), Duke University Medical Center, Durham, NC; and Department of Medicine, Division of Endocrinology (A.D., B.H.A.), Division of Cardiovascular Medicine (B.H.A.), and Robert M. Berne Cardiovascular Research Center (B.H.A.), University of Virginia School of Medicine, Charlottesville
| | - Jessica L Reinardy
- From Department of Physiology and Diabetes and Obesity Institute, East Carolina University, Brody School of Medicine, Greenville, NC (J.M.M., T.E.R., C.A.S., T.D.G., E.E.S); Department of Medicine, Division of Cardiology (T.J.M., J.L.R., S.B.M., C.D.K.), Department of Surgery, Division of General Surgery (K.W.S.), Department of Pharmacology and Cancer Biology (J.L.R., S.B.M., C.D.K.), Department of Radiology (T.N.V., C.D.L.), and Department of Molecular Genetics and Microbiology (S.K., D.A.M.), Duke University Medical Center, Durham, NC; and Department of Medicine, Division of Endocrinology (A.D., B.H.A.), Division of Cardiovascular Medicine (B.H.A.), and Robert M. Berne Cardiovascular Research Center (B.H.A.), University of Virginia School of Medicine, Charlottesville
| | - Sarah B Mueller
- From Department of Physiology and Diabetes and Obesity Institute, East Carolina University, Brody School of Medicine, Greenville, NC (J.M.M., T.E.R., C.A.S., T.D.G., E.E.S); Department of Medicine, Division of Cardiology (T.J.M., J.L.R., S.B.M., C.D.K.), Department of Surgery, Division of General Surgery (K.W.S.), Department of Pharmacology and Cancer Biology (J.L.R., S.B.M., C.D.K.), Department of Radiology (T.N.V., C.D.L.), and Department of Molecular Genetics and Microbiology (S.K., D.A.M.), Duke University Medical Center, Durham, NC; and Department of Medicine, Division of Endocrinology (A.D., B.H.A.), Division of Cardiovascular Medicine (B.H.A.), and Robert M. Berne Cardiovascular Research Center (B.H.A.), University of Virginia School of Medicine, Charlottesville
| | - Talaignair N Venkatraman
- From Department of Physiology and Diabetes and Obesity Institute, East Carolina University, Brody School of Medicine, Greenville, NC (J.M.M., T.E.R., C.A.S., T.D.G., E.E.S); Department of Medicine, Division of Cardiology (T.J.M., J.L.R., S.B.M., C.D.K.), Department of Surgery, Division of General Surgery (K.W.S.), Department of Pharmacology and Cancer Biology (J.L.R., S.B.M., C.D.K.), Department of Radiology (T.N.V., C.D.L.), and Department of Molecular Genetics and Microbiology (S.K., D.A.M.), Duke University Medical Center, Durham, NC; and Department of Medicine, Division of Endocrinology (A.D., B.H.A.), Division of Cardiovascular Medicine (B.H.A.), and Robert M. Berne Cardiovascular Research Center (B.H.A.), University of Virginia School of Medicine, Charlottesville
| | - Christopher D Lascola
- From Department of Physiology and Diabetes and Obesity Institute, East Carolina University, Brody School of Medicine, Greenville, NC (J.M.M., T.E.R., C.A.S., T.D.G., E.E.S); Department of Medicine, Division of Cardiology (T.J.M., J.L.R., S.B.M., C.D.K.), Department of Surgery, Division of General Surgery (K.W.S.), Department of Pharmacology and Cancer Biology (J.L.R., S.B.M., C.D.K.), Department of Radiology (T.N.V., C.D.L.), and Department of Molecular Genetics and Microbiology (S.K., D.A.M.), Duke University Medical Center, Durham, NC; and Department of Medicine, Division of Endocrinology (A.D., B.H.A.), Division of Cardiovascular Medicine (B.H.A.), and Robert M. Berne Cardiovascular Research Center (B.H.A.), University of Virginia School of Medicine, Charlottesville
| | - Sehoon Keum
- From Department of Physiology and Diabetes and Obesity Institute, East Carolina University, Brody School of Medicine, Greenville, NC (J.M.M., T.E.R., C.A.S., T.D.G., E.E.S); Department of Medicine, Division of Cardiology (T.J.M., J.L.R., S.B.M., C.D.K.), Department of Surgery, Division of General Surgery (K.W.S.), Department of Pharmacology and Cancer Biology (J.L.R., S.B.M., C.D.K.), Department of Radiology (T.N.V., C.D.L.), and Department of Molecular Genetics and Microbiology (S.K., D.A.M.), Duke University Medical Center, Durham, NC; and Department of Medicine, Division of Endocrinology (A.D., B.H.A.), Division of Cardiovascular Medicine (B.H.A.), and Robert M. Berne Cardiovascular Research Center (B.H.A.), University of Virginia School of Medicine, Charlottesville
| | - Douglas A Marchuk
- From Department of Physiology and Diabetes and Obesity Institute, East Carolina University, Brody School of Medicine, Greenville, NC (J.M.M., T.E.R., C.A.S., T.D.G., E.E.S); Department of Medicine, Division of Cardiology (T.J.M., J.L.R., S.B.M., C.D.K.), Department of Surgery, Division of General Surgery (K.W.S.), Department of Pharmacology and Cancer Biology (J.L.R., S.B.M., C.D.K.), Department of Radiology (T.N.V., C.D.L.), and Department of Molecular Genetics and Microbiology (S.K., D.A.M.), Duke University Medical Center, Durham, NC; and Department of Medicine, Division of Endocrinology (A.D., B.H.A.), Division of Cardiovascular Medicine (B.H.A.), and Robert M. Berne Cardiovascular Research Center (B.H.A.), University of Virginia School of Medicine, Charlottesville
| | - Espen E Spangenburg
- From Department of Physiology and Diabetes and Obesity Institute, East Carolina University, Brody School of Medicine, Greenville, NC (J.M.M., T.E.R., C.A.S., T.D.G., E.E.S); Department of Medicine, Division of Cardiology (T.J.M., J.L.R., S.B.M., C.D.K.), Department of Surgery, Division of General Surgery (K.W.S.), Department of Pharmacology and Cancer Biology (J.L.R., S.B.M., C.D.K.), Department of Radiology (T.N.V., C.D.L.), and Department of Molecular Genetics and Microbiology (S.K., D.A.M.), Duke University Medical Center, Durham, NC; and Department of Medicine, Division of Endocrinology (A.D., B.H.A.), Division of Cardiovascular Medicine (B.H.A.), and Robert M. Berne Cardiovascular Research Center (B.H.A.), University of Virginia School of Medicine, Charlottesville
| | - Ayotunde Dokun
- From Department of Physiology and Diabetes and Obesity Institute, East Carolina University, Brody School of Medicine, Greenville, NC (J.M.M., T.E.R., C.A.S., T.D.G., E.E.S); Department of Medicine, Division of Cardiology (T.J.M., J.L.R., S.B.M., C.D.K.), Department of Surgery, Division of General Surgery (K.W.S.), Department of Pharmacology and Cancer Biology (J.L.R., S.B.M., C.D.K.), Department of Radiology (T.N.V., C.D.L.), and Department of Molecular Genetics and Microbiology (S.K., D.A.M.), Duke University Medical Center, Durham, NC; and Department of Medicine, Division of Endocrinology (A.D., B.H.A.), Division of Cardiovascular Medicine (B.H.A.), and Robert M. Berne Cardiovascular Research Center (B.H.A.), University of Virginia School of Medicine, Charlottesville
| | - Brian H Annex
- From Department of Physiology and Diabetes and Obesity Institute, East Carolina University, Brody School of Medicine, Greenville, NC (J.M.M., T.E.R., C.A.S., T.D.G., E.E.S); Department of Medicine, Division of Cardiology (T.J.M., J.L.R., S.B.M., C.D.K.), Department of Surgery, Division of General Surgery (K.W.S.), Department of Pharmacology and Cancer Biology (J.L.R., S.B.M., C.D.K.), Department of Radiology (T.N.V., C.D.L.), and Department of Molecular Genetics and Microbiology (S.K., D.A.M.), Duke University Medical Center, Durham, NC; and Department of Medicine, Division of Endocrinology (A.D., B.H.A.), Division of Cardiovascular Medicine (B.H.A.), and Robert M. Berne Cardiovascular Research Center (B.H.A.), University of Virginia School of Medicine, Charlottesville
| | - Christopher D Kontos
- From Department of Physiology and Diabetes and Obesity Institute, East Carolina University, Brody School of Medicine, Greenville, NC (J.M.M., T.E.R., C.A.S., T.D.G., E.E.S); Department of Medicine, Division of Cardiology (T.J.M., J.L.R., S.B.M., C.D.K.), Department of Surgery, Division of General Surgery (K.W.S.), Department of Pharmacology and Cancer Biology (J.L.R., S.B.M., C.D.K.), Department of Radiology (T.N.V., C.D.L.), and Department of Molecular Genetics and Microbiology (S.K., D.A.M.), Duke University Medical Center, Durham, NC; and Department of Medicine, Division of Endocrinology (A.D., B.H.A.), Division of Cardiovascular Medicine (B.H.A.), and Robert M. Berne Cardiovascular Research Center (B.H.A.), University of Virginia School of Medicine, Charlottesville
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6
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Tovmasyan A, Sampaio RS, Boss MK, Bueno-Janice JC, Bader BH, Thomas M, Reboucas JS, Orr M, Chandler JD, Go YM, Jones DP, Venkatraman TN, Haberle S, Kyui N, Lascola CD, Dewhirst MW, Spasojevic I, Benov L, Batinic-Haberle I. Anticancer therapeutic potential of Mn porphyrin/ascorbate system. Free Radic Biol Med 2015; 89:1231-47. [PMID: 26496207 PMCID: PMC4684782 DOI: 10.1016/j.freeradbiomed.2015.10.416] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/08/2015] [Revised: 10/05/2015] [Accepted: 10/18/2015] [Indexed: 01/12/2023]
Abstract
Ascorbate (Asc) as a single agent suppressed growth of several tumor cell lines in a mouse model. It has been tested in a Phase I Clinical Trial on pancreatic cancer patients where it exhibited no toxicity to normal tissue yet was of only marginal efficacy. The mechanism of its anticancer effect was attributed to the production of tumoricidal hydrogen peroxide (H2O2) during ascorbate oxidation catalyzed by endogenous metalloproteins. The amount of H2O2 could be maximized with exogenous catalyst that has optimized properties for such function and is localized within tumor. Herein we studied 14 Mn porphyrins (MnPs) which differ vastly with regards to their redox properties, charge, size/bulkiness and lipophilicity. Such properties affect the in vitro and in vivo ability of MnPs (i) to catalyze ascorbate oxidation resulting in the production of H2O2; (ii) to subsequently employ H2O2 in the catalysis of signaling proteins oxidations affecting cellular survival pathways; and (iii) to accumulate at site(s) of interest. The metal-centered reduction potential of MnPs studied, E1/2 of Mn(III)P/Mn(II)P redox couple, ranged from -200 to +350 mV vs NHE. Anionic and cationic, hydrophilic and lipophilic as well as short- and long-chained and bulky compounds were explored. Their ability to catalyze ascorbate oxidation, and in turn cytotoxic H2O2 production, was explored via spectrophotometric and electrochemical means. Bell-shape structure-activity relationship (SAR) was found between the initial rate for the catalysis of ascorbate oxidation, vo(Asc)ox and E1/2, identifying cationic Mn(III) N-substituted pyridylporphyrins with E1/2>0 mV vs NHE as efficient catalysts for ascorbate oxidation. The anticancer potential of MnPs/Asc system was subsequently tested in cellular (human MCF-7, MDA-MB-231 and mouse 4T1) and animal models of breast cancer. At the concentrations where ascorbate (1mM) and MnPs (1 or 5 µM) alone did not trigger any alteration in cell viability, combined treatment suppressed cell viability up to 95%. No toxicity was observed with normal human breast epithelial HBL-100 cells. Bell-shape relationship, essentially identical to vo(Asc)oxvs E1/2, was also demonstrated between MnP/Asc-controlled cytotoxicity and E1/2-controlled vo(Asc)ox. Magnetic resonance imaging studies were conducted to explore the impact of ascorbate on T1-relaxivity. The impact of MnP/Asc on intracellular thiols and on GSH/GSSG and Cys/CySS ratios in 4T1 cells was assessed and cellular reduction potentials were calculated. The data indicate a significant increase in cellular oxidative stress induced by MnP/Asc. Based on vo(Asc)oxvs E1/2 relationships and cellular toxicity, MnTE-2-PyP(5+) was identified as the best catalyst among MnPs studied. Asc and MnTE-2-PyP(5+) were thus tested in a 4T1 mammary mouse flank tumor model. The combination of ascorbate (4 g/kg) and MnTE-2-PyP(5+) (0.2mg/kg) showed significant suppression of tumor growth relative to either MnTE-2-PyP(5+) or ascorbate alone. About 7-fold higher accumulation of MnTE-2-PyP(5+) in tumor vs normal tissue was found to contribute largely to the anticancer effect.
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Affiliation(s)
- Artak Tovmasyan
- Department of Radiation Oncology, Duke University School of Medicine, Durham, NC 27710, United States
| | - Romulo S Sampaio
- Department of Radiation Oncology, Duke University School of Medicine, Durham, NC 27710, United States; Departamento de Quimica, CCEN, Universidade Federal da Paraiba, Joao Pessoa, PB 58051-900, Brazil
| | - Mary-Keara Boss
- Department of Molecular Biomedical Sciences, North Carolina State University College of Veterinary Medicine, Raleigh, NC 27607, United States
| | - Jacqueline C Bueno-Janice
- Department of Radiation Oncology, Duke University School of Medicine, Durham, NC 27710, United States; Departamento de Quimica, CCEN, Universidade Federal da Paraiba, Joao Pessoa, PB 58051-900, Brazil
| | - Bader H Bader
- Department of Biochemistry, Faculty of Medicine, Kuwait University, Kuwait
| | - Milini Thomas
- Department of Biochemistry, Faculty of Medicine, Kuwait University, Kuwait
| | - Julio S Reboucas
- Departamento de Quimica, CCEN, Universidade Federal da Paraiba, Joao Pessoa, PB 58051-900, Brazil
| | - Michael Orr
- Division of Pulmonary, Allergy and Critical Care Medicine, Department of Medicine, Emory University, Atlanta, GA, United States
| | - Joshua D Chandler
- Division of Pulmonary, Allergy and Critical Care Medicine, Department of Medicine, Emory University, Atlanta, GA, United States
| | - Young-Mi Go
- Division of Pulmonary, Allergy and Critical Care Medicine, Department of Medicine, Emory University, Atlanta, GA, United States
| | - Dean P Jones
- Division of Pulmonary, Allergy and Critical Care Medicine, Department of Medicine, Emory University, Atlanta, GA, United States
| | | | - Sinisa Haberle
- Department of Radiology, Duke University School of Medicine, Durham, NC 27710, United States
| | - Natalia Kyui
- Canadian Economic Analysis Department, Bank of Canada, Ottawa, ON K1A 0G9, Canada
| | - Christopher D Lascola
- Department of Radiology, Duke University School of Medicine, Durham, NC 27710, United States
| | - Mark W Dewhirst
- Department of Radiation Oncology, Duke University School of Medicine, Durham, NC 27710, United States
| | - Ivan Spasojevic
- Department of Medicine, Duke University School of Medicine, Durham, NC 27710, United States; Duke Cancer Institute, Pharmaceutical Research Shared Resource, PK/PD Core laboratory, Durham NC 27710, United States
| | - Ludmil Benov
- Department of Biochemistry, Faculty of Medicine, Kuwait University, Kuwait
| | - Ines Batinic-Haberle
- Department of Radiation Oncology, Duke University School of Medicine, Durham, NC 27710, United States.
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