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Human milk oligosaccharides 3′-sialyllactose and 6′-sialyllactose protect intestine against necrotizing enterocolitis damage induced by hypoxia. J Funct Foods 2021. [DOI: 10.1016/j.jff.2021.104708] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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Cebpd Is Essential for Gamma-Tocotrienol Mediated Protection against Radiation-Induced Hematopoietic and Intestinal Injury. Antioxidants (Basel) 2018; 7:antiox7040055. [PMID: 29642403 PMCID: PMC5946121 DOI: 10.3390/antiox7040055] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2018] [Revised: 04/02/2018] [Accepted: 04/03/2018] [Indexed: 02/06/2023] Open
Abstract
Gamma-tocotrienol (GT3) confers protection against ionizing radiation (IR)-induced injury. However, the molecular targets that underlie the protective functions of GT3 are not yet known. We have reported that mice lacking CCAAT enhancer binding protein delta (Cebpd−/−) display increased mortality to IR due to injury to the hematopoietic and intestinal tissues and that Cebpd protects from IR-induced oxidative stress and cell death. The purpose of this study was to investigate whether Cebpd mediates the radio protective functions of GT3. We found that GT3-treated Cebpd−/− mice showed partial recovery of white blood cells compared to GT3-treated Cebpd+/+ mice at 2 weeks post-IR. GT3-treated Cebpd−/− mice showed an increased loss of intestinal crypt colonies, which correlated with increased expression of inflammatory cytokines and chemokines, increased levels of oxidized glutathione (GSSG), S-nitrosoglutathione (GSNO) and 3-nitrotyrosine (3-NT) after exposure to IR compared to GT3-treated Cebpd+/+ mice. Cebpd is induced by IR as well as a combination of IR and GT3 in the intestine. Studies have shown that granulocyte-colony stimulating factor (G-CSF), mediates the radioprotective functions of GT3. Interestingly, we found that IR alone as well as the combination of IR and GT3 caused robust augmentation of plasma G-CSF in both Cebpd+/+ and Cebpd−/− mice. These results identify a novel role for Cebpd in GT3-mediated protection against IR-induced injury, in part via modulation of IR-induced inflammation and oxidative/nitrosative stress, which is independent of G-CSF.
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Mellatyar H, Talaei S, Pilehvar-Soltanahmadi Y, Barzegar A, Akbarzadeh A, Shahabi A, Barekati-Mowahed M, Zarghami N. Targeted cancer therapy through 17-DMAG as an Hsp90 inhibitor: Overview and current state of the art. Biomed Pharmacother 2018; 102:608-617. [PMID: 29602128 DOI: 10.1016/j.biopha.2018.03.102] [Citation(s) in RCA: 70] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2018] [Revised: 03/06/2018] [Accepted: 03/17/2018] [Indexed: 12/08/2022] Open
Abstract
Heat shock protein 90 (Hsp90) is an evolutionary preserved molecular chaperone which mediates many cellular processes such as cell transformation, proliferation, and survival in normal and stress conditions. Hsp90 plays an important role in folding, maturation, stabilization and activation of Hsp90 client proteins which all contribute to the development, and proliferation of cancer as well as other inflammatory diseases. Functional inhibition of Hsp90 can have a massive effect on various oncogenic and inflammatory pathways, and will result in the degradation of their client proteins. This turns it into an interesting target in the treatment of different malignancies. 17-dimethylaminoethylamino-17-demethoxygeldanamycin (17-DMAG) as a semi-synthetic derivative of geldanamycin, has several advantages over 17-Allylamino-17-demethoxygeldanamycin (17-AAG) such as higher water solubility, good bioavailability, reduced metabolism, and greater anti-tumour capability. 17-DMAG binds to the Hsp90, and inhibits its function which eventually results in the degradation of Hsp90 client proteins. Here, we reviewed the pre-clinical data and clinical trial data on 17-DMAG as a single agent, in combination with other agents and loaded on nanomaterials in various cancers and inflammatory diseases.
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Affiliation(s)
- Hassan Mellatyar
- Hematology and Oncology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran; Department of Medical Biotechnology, Faculty of Advanced Medical Sciences, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Sona Talaei
- Hematology and Oncology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran; Department of Medical Biotechnology, Faculty of Advanced Medical Sciences, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Younes Pilehvar-Soltanahmadi
- Hematology and Oncology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran; Department of Medical Biotechnology, Faculty of Advanced Medical Sciences, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Abolfazl Barzegar
- Research Institute for Fundamental Sciences (RIFS), University of Tabriz, Tabriz, Iran
| | - Abolfazl Akbarzadeh
- Department of Medical Nanotechnology, Faculty of Advanced Medical Sciences, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Arman Shahabi
- Department of Molecular Medicine, Faculty of Advanced Medical Sciences, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Mazyar Barekati-Mowahed
- Department of Physiology and Biophysics, School of Medicine, Case Western Reserve University, 10900 Euclid Avenue, Cleveland, OH 44106, USA
| | - Nosratollah Zarghami
- Hematology and Oncology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran; Department of Medical Biotechnology, Faculty of Advanced Medical Sciences, Tabriz University of Medical Sciences, Tabriz, Iran.
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Hartmann RM, Licks F, Schemitt EG, Colares JR, do Couto Soares M, Zabot GP, Fillmann HS, Marroni NP. Protective effect of glutamine on the main and adjacent organs damaged by ischemia-reperfusion in rats. PROTOPLASMA 2017; 254:2155-2168. [PMID: 28382390 DOI: 10.1007/s00709-017-1102-3] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/18/2016] [Accepted: 03/10/2017] [Indexed: 06/07/2023]
Abstract
Intestinal ischemia and reperfusion (I/R) causes cellular and tissue damage to the intestine and remote organs such as the liver. Increased production of ROS and nitric oxide and dysregulation of cytoprotective enzymes may be involved in intestinal I/R. The aim was to evaluate the protective effects of glutamine on the intestine and liver of rats with intestinal I/R injury. Twenty male Wistar rats (300 g) were divided into four groups: sham-operated (SO), glutamine + SO (G + SO), I/R, and glutamine + I/R (G + I/R). Occlusion of the SMA for 30 min was followed by 15-min reperfusion. Glutamine (25 mg/kg/day) was administered once daily 24 and 48 h before I/R induction. Blood and tissue of were collected for aspartate aminotransferase (AST) and alanine aminotransferase (ALT) levels, histopathological analysis, immunohistochemistry of IL-1β and TNF-α, thiobarbituric acid reactive substance (TBARS) and nitric oxide, Nrf2/keap1, superoxide dismutase (SOD), NADPH quinone oxidoreductase1 (NQO1), inducible nitric oxide synthase (iNOS), heat shock protein (HSP70), glucose-regulated protein 78 (GRP78), and activating transcription factor 6 (ATF-6) by western blot. Statistic analysis by ANOVA-Student-Newman-Keuls test (mean ± SE) significantly was p < 0.05. Tissue damage, AST, ALT, IL-1β, TNF-α, TBARS, NO, Keap1, iNOS, GRP78, and ATF-6 expression were significantly lower in the G + I/R group as compared to the I/R group. Expression of Nrf2, SOD, NQO1, and HSP70, was significantly higher in the G + I/R group as compared to I/R group. Pre-treatment with glutamine provided protection against oxidative damage in the intestine and liver in an experimental model of intestinal I/R.
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Affiliation(s)
- Renata Minuzzo Hartmann
- Graduate Program in Medicine: Medical Sciences, Universidade Federal do Rio Grande do Sul - UFRGS, Porto Alegre, Rio Grande do Sul, Brazil
- Laboratory of Experimental Hepatology and Gastroenterology, Hospital de Clínicas de Porto Alegre - HCPA, Porto Alegre, Rio Grande do Sul, Brazil
- Laboratory of Oxidative Stress and Antioxidants, Universidade Luterana do Brasil, Canoas, Rio Grande do Sul, Brazil
| | - Francielli Licks
- Graduate Program in Biological Sciences: Physiology, Universidade Federal do Rio Grande do Sul - UFRGS, Porto Alegre, Rio Grande do Sul, Brazil
- Laboratory of Experimental Hepatology and Gastroenterology, Hospital de Clínicas de Porto Alegre - HCPA, Porto Alegre, Rio Grande do Sul, Brazil
- Laboratory of Oxidative Stress and Antioxidants, Universidade Luterana do Brasil, Canoas, Rio Grande do Sul, Brazil
| | - Elizângela Gonçalves Schemitt
- Graduate Program in Medicine: Medical Sciences, Universidade Federal do Rio Grande do Sul - UFRGS, Porto Alegre, Rio Grande do Sul, Brazil
- Laboratory of Experimental Hepatology and Gastroenterology, Hospital de Clínicas de Porto Alegre - HCPA, Porto Alegre, Rio Grande do Sul, Brazil
- Laboratory of Oxidative Stress and Antioxidants, Universidade Luterana do Brasil, Canoas, Rio Grande do Sul, Brazil
| | - Josieli Raskopf Colares
- Graduate Program in Medicine: Medical Sciences, Universidade Federal do Rio Grande do Sul - UFRGS, Porto Alegre, Rio Grande do Sul, Brazil
- Laboratory of Experimental Hepatology and Gastroenterology, Hospital de Clínicas de Porto Alegre - HCPA, Porto Alegre, Rio Grande do Sul, Brazil
- Laboratory of Oxidative Stress and Antioxidants, Universidade Luterana do Brasil, Canoas, Rio Grande do Sul, Brazil
| | - Mariana do Couto Soares
- Laboratory of Experimental Hepatology and Gastroenterology, Hospital de Clínicas de Porto Alegre - HCPA, Porto Alegre, Rio Grande do Sul, Brazil
- Laboratory of Oxidative Stress and Antioxidants, Universidade Luterana do Brasil, Canoas, Rio Grande do Sul, Brazil
| | - Gilmara Pandolfo Zabot
- Pontifícia Universidade Católica do Rio Grande do Sul - PUCRS, Porto Alegre, Rio Grande do Sul, Brazil
| | - Henrique Sarubbi Fillmann
- Laboratory of Experimental Hepatology and Gastroenterology, Hospital de Clínicas de Porto Alegre - HCPA, Porto Alegre, Rio Grande do Sul, Brazil
- Laboratory of Oxidative Stress and Antioxidants, Universidade Luterana do Brasil, Canoas, Rio Grande do Sul, Brazil
- Pontifícia Universidade Católica do Rio Grande do Sul - PUCRS, Porto Alegre, Rio Grande do Sul, Brazil
| | - Norma Possa Marroni
- Graduate Program in Medicine: Medical Sciences, Universidade Federal do Rio Grande do Sul - UFRGS, Porto Alegre, Rio Grande do Sul, Brazil.
- Graduate Program in Biological Sciences: Physiology, Universidade Federal do Rio Grande do Sul - UFRGS, Porto Alegre, Rio Grande do Sul, Brazil.
- Laboratory of Experimental Hepatology and Gastroenterology, Hospital de Clínicas de Porto Alegre - HCPA, Porto Alegre, Rio Grande do Sul, Brazil.
- Laboratory of Oxidative Stress and Antioxidants, Universidade Luterana do Brasil, Canoas, Rio Grande do Sul, Brazil.
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Liu X, Zhang J, Han W, Wang Y, Liu Y, Zhang Y, Zhou D, Xiang L. Inhibition of BTK protects lungs from trauma-hemorrhagic shock-induced injury in rats. Mol Med Rep 2017; 16:192-200. [PMID: 28487990 PMCID: PMC5482099 DOI: 10.3892/mmr.2017.6553] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2016] [Accepted: 01/31/2017] [Indexed: 01/05/2023] Open
Abstract
The present study aimed to investigate the role of Bruton's tyrosine kinase (BTK) in the pathogenesis of lung injury induced by trauma‑hemorrhagic shock (THS), and to examine the pulmonary protective effects of BTK inhibition. Male Sprague‑Dawley rats were divided into four groups (n=12/group): i) A Sham group, which received surgery without induced trauma; ii) a THS‑induced injury group; iii) a THS‑induced injury group that also received treatment with the BTK inhibitor LFM‑A13 prior to trauma induction; and iv) a Sham group that was pretreated with LFM‑A13 prior to surgery but did not receive induced trauma. The expression of phosphorylated‑BTK protein in the lungs was measured by immunohistochemistry and western blot analysis. The bronchoalveolar lavage fluid (BALF) protein concentration, total leukocyte and eosinophil numbers, and the expression levels of peripheral blood proinflammatory factors were measured. Morphological alterations in the lungs were detected by hematoxylin and eosin staining. Pulmonary nitric oxide (NO) concentration and inducible NO synthase (iNOS) expression were also assessed. Activities of the nuclear factor (NF)‑κB and mitogen‑activated protein kinase (MAPK) signaling pathways were determined by western blotting or electrophoretic mobility shift assay. BTK was notably activated in lungs of THS rats. BALF protein concentration, total leukocytes and eosinophils, peripheral blood expression levels of tumor necrosis factor‑α, interleukin (IL)‑1β, IL‑6 and monocyte chemotactic protein 1 were significantly upregulated after THS induction, and each exhibited decreased expression upon LFM‑A13 treatment. THS‑induced interstitial hyperplasia, edema and neutrophilic infiltration in lungs were improved by the inhibition of BTK. In addition, THS‑induced NO release, iNOS overexpression, and NF‑κB and MAPK signaling were suppressed by BTK inhibition. Results from the present study demonstrate that BTK may serve a pivotal role in the pathogenesis of THS‑related lung injury, and the inhibition of BTK may significantly alleviate THS‑induced lung damage. These results provide a potential therapeutic application for the treatment of THS‑induced lung injury.
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Affiliation(s)
- Xinwei Liu
- Department of Orthopaedic Surgery, Rescue Center for Severe Wound and Trauma of Chinese PLA, The General Hospital of Shenyang Military Area Command, Shenyang, Liaoning 110016, P.R. China
| | - Jingdong Zhang
- Department of Orthopaedic Surgery, Rescue Center for Severe Wound and Trauma of Chinese PLA, The General Hospital of Shenyang Military Area Command, Shenyang, Liaoning 110016, P.R. China
| | - Wenfeng Han
- Department of Orthopaedic Surgery, Rescue Center for Severe Wound and Trauma of Chinese PLA, The General Hospital of Shenyang Military Area Command, Shenyang, Liaoning 110016, P.R. China
| | - Yu Wang
- Department of Orthopaedic Surgery, Rescue Center for Severe Wound and Trauma of Chinese PLA, The General Hospital of Shenyang Military Area Command, Shenyang, Liaoning 110016, P.R. China
| | - Yunen Liu
- Laboratory of Severe and War‑Related Trauma Center, The General Hospital of Shenyang Military Area Command, Shenyang, Liaoning 110016, P.R. China
| | - Yubiao Zhang
- Laboratory of Severe and War‑Related Trauma Center, The General Hospital of Shenyang Military Area Command, Shenyang, Liaoning 110016, P.R. China
| | - Dapeng Zhou
- Department of Orthopaedic Surgery, Rescue Center for Severe Wound and Trauma of Chinese PLA, The General Hospital of Shenyang Military Area Command, Shenyang, Liaoning 110016, P.R. China
| | - Liangbi Xiang
- Department of Orthopaedic Surgery, Rescue Center for Severe Wound and Trauma of Chinese PLA, The General Hospital of Shenyang Military Area Command, Shenyang, Liaoning 110016, P.R. China
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Kiang JG. Exacerbation of Mild Hypoxia on Acute Radiation Syndrome and Subsequent Mortality. ADAPTIVE MEDICINE 2017; 9:28-33. [PMID: 34616568 PMCID: PMC8491646 DOI: 10.4247/am.2017.abg170] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Mild hypoxia induced by 20% hemorrhage results in increases in few cytokine concentrations and sclerostin levels in blood, but shows no changes in bone formation, bone marrow cellularity, and gastrointestinal (GI) integrity and no systemic bacterial infection as well as no subsequent mortality. On the other hand, severe hypoxia induced by 40% hemorrhage causes significant increases in most cytokine concentrations, GI injury, lung injury, systemic bacterial infection, cellular ATP reduction and subsequent mortality. The severe hypoxia drastically damages GI and lung morphology, elevates cytokine concentrations in blood and increases inducible nitric oxide synthase (iNOS) expression in cells that is mediated by transcription factors NF-κB/NF-IL6, subsequently producing free radicals that disrupt mitochondria. ATP depletion, p53 phosphorylation, and caspase-3 activation are found, suggesting cell apoptosis. As a result, mortality occurs. However, when mild hypoxia follows ionizing radiation, the mild hypoxia significantly enhances radiation-induced mortality and acute radiation syndrome, including injury of bone marrow, GI, kidney, and lung. The synergism also occurs at the molecular level, resulting in alteration of microRNAs, amplification of iNOS expression, cytokine increases, sepsis, and ATP depletion. This is the first demonstration of synergistic effects between mild hypoxia and ionizing radiation.
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Affiliation(s)
- Juliann G Kiang
- Radiation Combined Injury Program, Armed Forces Radiobiology Research Institute Department of Pharmacology and Molecular Therapeutics, Department of Medicine Uniformed Services University of the Health Sciences, Bethesda, Maryland, U.S.A
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Wang YL, Shen HH, Cheng PY, Chu YJ, Hwang HR, Lam KK, Lee YM. 17-DMAG, an HSP90 Inhibitor, Ameliorates Multiple Organ Dysfunction Syndrome via Induction of HSP70 in Endotoxemic Rats. PLoS One 2016; 11:e0155583. [PMID: 27224288 PMCID: PMC4880344 DOI: 10.1371/journal.pone.0155583] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2015] [Accepted: 05/02/2016] [Indexed: 01/14/2023] Open
Abstract
Sepsis is a systemic inflammatory disorder, accompanied with elevated oxidative stress, leading to multiple organ dysfunction syndrome (MODS), and disseminated intravascular coagulation. 17-Dimethylaminoethylamino- 17-demethoxygeldanamycin (17-DMAG), a heat shock protein (HSP) 90 inhibitor, has been reported to possess anti-inflammatory effects. In this study, the beneficial effects of 17-DMAG on lipopolysaccharide (LPS) induced MODS and DIC was evaluated in anesthetized rats. 17-DMAG (5 mg/kg, i.p.) was significantly increased survival rate, and prevented hypotension in LPS (30 mg/kg i.v. infused for 4 h) induced endotoxemia. The elevated levels of alanine aminotransferase (ALT), creatine phosphokinase (CPK), lactate dehydrogenase, creatinine, nitric oxide (NO) metabolites, IL-6, and TNF-α in LPS-exposed rat plasma were significantly reduced by 17-DMAG. Moreover, 17-DMAG suppressed LPS-induced superoxide anion production and caspase 3 activation in heart tissues. LPS induced the prolongation of prothrombin time, and a pronounced decrease in platelet count, which were improved by 17-DMAG. 17-DMAG markedly induced HSP70 and heme oxygenase (HO)-1, and suppressed inducible nitric oxide synthase (iNOS) and phosphorylated NF-κB p65 protein expression in organs 6 h after LPS initiation. Pretreatment with high dose of quercetin (300 mg/kg, i.p.), as an HSP70 inhibitor, reversed the beneficial effects of 17-DMAG on survival rate, plasma levels of ALT, CPK, creatinine, IL-6, and NO metabolites, iNOS induction, and caspase-3 activation in LPS-treated rats. In conclusion, 17-DMAG possesses the anti-inflammatory and antioxidant effects that were proved through LPS-induced acute inflammation, which is associated with induction of HSP70 and HO-1, leading to prevent MODS in sepsis.
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Affiliation(s)
- Yi-Li Wang
- Graduate Institute of Life Sciences, National Defense Medical Center, Taipei, Taiwan
| | - Hsin-Hsueh Shen
- Department of Pharmacology, National Defense Medical Center, Taipei, Taiwan
| | - Pao-Yun Cheng
- Department of Physiology & Biophysics, National Defense Medical Center, Taipei, Taiwan
| | - Yen-Ju Chu
- Department of Pharmacology, National Defense Medical Center, Taipei, Taiwan
| | - Hwong-Ru Hwang
- Division of Cardiology, Department of Medicine, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan
| | - Kwok-Keung Lam
- Department of Pharmacology, Taipei Medical University, Taipei, Taiwan
- Department of Anesthesiology, Catholic Mercy Hospital, Hsinchu, Taiwan
- * E-mail: (YML); (KKL)
| | - Yen-Mei Lee
- Graduate Institute of Life Sciences, National Defense Medical Center, Taipei, Taiwan
- Department of Pharmacology, National Defense Medical Center, Taipei, Taiwan
- * E-mail: (YML); (KKL)
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MA HONGMEI, YAO LI, PANG LING, LI XINGWEI, YAO QUN. Tetrandrine ameliorates sevoflurane-induced cognitive impairment via the suppression of inflammation and apoptosis in aged rats. Mol Med Rep 2016; 13:4814-20. [DOI: 10.3892/mmr.2016.5132] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2015] [Accepted: 12/01/2015] [Indexed: 11/05/2022] Open
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BAO MEIHUA, LI JIANMING, ZHOU QILIANG, LI GUANGYI, ZENG JIE, ZHAO JUAN, ZHANG YIWEN. Effects of miR-590 on oxLDL-induced endothelial cell apoptosis: Roles of p53 and NF-κB. Mol Med Rep 2015; 13:867-73. [DOI: 10.3892/mmr.2015.4606] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2015] [Accepted: 10/21/2015] [Indexed: 11/06/2022] Open
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Kiang JG, Smith JT, Anderson MN, Swift JM, Christensen CL, Gupta P, Balakathiresan N, Maheshwari RK. Hemorrhage Exacerbates Radiation Effects on Survival, Leukocytopenia, Thrombopenia, Erythropenia, Bone Marrow Cell Depletion and Hematopoiesis, and Inflammation-Associated microRNAs Expression in Kidney. PLoS One 2015; 10:e0139271. [PMID: 26422254 PMCID: PMC4589285 DOI: 10.1371/journal.pone.0139271] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2015] [Accepted: 09/09/2015] [Indexed: 12/18/2022] Open
Abstract
Exposure to high-dose radiation results in detrimental effects on survival. The effects of combined trauma, such as radiation in combination with hemorrhage, the typical injury of victims exposed to a radiation blast, on survival and hematopoietic effects have yet to be understood. The purpose of this study was to evaluate the effects of radiation injury (RI) combined with hemorrhage (i.e., combined injury, CI) on survival and hematopoietic effects, and to investigate whether hemorrhage (Hemo) enhanced RI-induced mortality and hematopoietic syndrome. Male CD2F1 mice (10 weeks old) were given one single exposure of γ- radiation (60Co) at various doses (0.6 Gy/min). Within 2 hr after RI, animals under anesthesia were bled 0% (Sham) or 20% (Hemo) of total blood volume via the submandibular vein. In these mice, Hemo reduced the LD50/30 for 30-day survival from 9.1 Gy (RI) to 8.75 Gy (CI) with a DMF of 1.046. RI resulted in leukocytopenia, thrombopenia, erythropenia, and bone marrow cell depletion, but decreased the caspase-3 activation response. RI increased IL-1β, IL-6, IL-17A, and TNF-α concentrations in serum, bone marrow, ileum, spleen, and kidney. Some of these adverse alterations were magnified by CI. Erythropoietin production was increased in kidney and blood more after CI than RI. Furthermore, CI altered the global miRNAs expression in kidney and the ingenuity pathway analysis showed that miRNAs viz., let-7e, miR-30e and miR-29b that were associated with hematopoiesis and inflammation. This study provides preliminary evidence that non-lethal Hemo exacerbates RI-induced mortality and cell losses associated with high-dose γ-radiation. We identified some of the initial changes occurring due to CI which may have facilitated in worsening the injury and hampering the recovery of animals ultimately resulting in higher mortality.
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Affiliation(s)
- Juliann G. Kiang
- Radiation Combined Injury Program, Armed Forces Radiobiology Research Institute, Uniformed Services University of the Health Sciences, Bethesda, Maryland, United States of America
- Department of Radiation Biology, Uniformed Services University of the Health Sciences, Bethesda, Maryland, United States of America
- Department of Medicine, Uniformed Services University of the Health Sciences, Bethesda, Maryland, United States of America
| | - Joan T. Smith
- Radiation Combined Injury Program, Armed Forces Radiobiology Research Institute, Uniformed Services University of the Health Sciences, Bethesda, Maryland, United States of America
| | - Marsha N. Anderson
- Radiation Combined Injury Program, Armed Forces Radiobiology Research Institute, Uniformed Services University of the Health Sciences, Bethesda, Maryland, United States of America
| | - Joshua M. Swift
- Department of Radiation Biology, Uniformed Services University of the Health Sciences, Bethesda, Maryland, United States of America
- Department of Military and Emergency Medicine, Uniformed Services University of the Health Sciences, Bethesda, Maryland, United States of America
- Undersea Medicine Department, Naval Medical Research Center, Silver Spring, Maryland, United States of America
| | - Christine L. Christensen
- Comparative Pathology Division, Veterinary Sciences Department, Armed Forces Radiobiology Research Institute, Uniformed Services University of the Health Sciences, Bethesda, Maryland, United States of America
| | - Paridhi Gupta
- Department of Pathology, Uniformed Services University of the Health Sciences, Bethesda, Maryland, United States of America
| | - Nagaraja Balakathiresan
- Department of Pathology, Uniformed Services University of the Health Sciences, Bethesda, Maryland, United States of America
| | - Radha K. Maheshwari
- Department of Pathology, Uniformed Services University of the Health Sciences, Bethesda, Maryland, United States of America
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Lu X, Nurmemet D, Bolduc DL, Elliott TB, Kiang JG. Radioprotective effects of oral 17-dimethylaminoethylamino-17-demethoxygeldanamycin in mice: bone marrow and small intestine. Cell Biosci 2013; 3:36. [PMID: 24499553 PMCID: PMC3852109 DOI: 10.1186/2045-3701-3-36] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2013] [Accepted: 08/01/2013] [Indexed: 01/05/2023] Open
Abstract
Background Our previous research demonstrated that one subcutaneous injection of 17-Dimethylaminoethylamino-17-demethoxygeldanamycin (17-DMAG) 24 hours (h) before irradiation (8.75 Gy) increased mouse survival by 75%. However, the protective mechanism of 17-DMAG is currently unknown. The present study aimed to investigate whether oral administration of 17-DMAG was also radioprotective and the potential role it may play in radioprotection. Results A single dose of orally pre-administered (24, 48, or 72 h) 17-DMAG (10 mg/kg) increased irradiated mouse survival, reduced body weight loss, improved water consumption, and decreased facial dropsy, whereas orally post-administered 17-DMAG failed. Additional oral doses of pre-treatment did not improve 30-day survival. The protective effect of multiple pre-administrations (2−3 times) of 17-DMAG at 10 mg/kg was equal to the outcome of a single pre-treatment. In 17-DMAG-pretreated mice, attenuation of bone marrow aplasia in femurs 30 days after irradiation with recovered expressions of cluster of differentiation 34, 44 (CD34, CD44), and survivin in bone marrow cells were observed. 17-DMAG also elevated serum granulocyte-colony stimulating factor (G-CSF), decreased serum fms-related tyrosine kinase 3 ligand, and reduced white blood cell depletion. 17-DMAG ameliorated small intestinal histological damage, promoted recovery of villus heights and intestinal crypts including stem cells, where increased leucine-rich repeat-containing G-protein coupled receptor 5 (Lgr5) was found 30 days after irradiation. Conclusions 17-DMAG is a potential radioprotectant for bone marrow and small intestine that results in survival improvement.
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Affiliation(s)
- Xinyue Lu
- Radiation Combined Injury Program, Scientific Research Department, Armed Forces Radiobiology Research Institute, 8901 Wisconsin Avenue, Bethesda, MD 20889-5603, USA.
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Effects of Kruppel-like factor 6 on osteosarcoma cell biological behavior. Tumour Biol 2013; 34:1097-105. [DOI: 10.1007/s13277-013-0651-0] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2012] [Accepted: 01/03/2013] [Indexed: 01/18/2023] Open
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Rao A, Taylor JL, Chi-Sabins N, Kawabe M, Gooding WE, Storkus WJ. Combination therapy with HSP90 inhibitor 17-DMAG reconditions the tumor microenvironment to improve recruitment of therapeutic T cells. Cancer Res 2012; 72:3196-206. [PMID: 22552283 DOI: 10.1158/0008-5472.can-12-0538] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Ineffective recognition of tumor cells by CD8+ T cells is a limitation of cancer immunotherapy. Therefore, treatment regimens that coordinately promote enhanced antitumor CD8+ T-cell activation, delivery, and target cell recognition should yield greater clinical benefit. Using an MCA205 sarcoma model, we show that in vitro treatment of tumor cells with the HSP90 inhibitor 17-DMAG results in the transient (proteasome-dependent) degradation of the HSP90 client protein EphA2 and the subsequent increased recognition of tumor cells by Type-1 anti-EphA2 CD8+ T cells. In vivo administration of 17-DMAG to tumor-bearing mice led to slowed tumor growth, enhanced/prolonged recognition of tumor cells by anti-EphA2 CD8+ T cells, reduced levels of myeloid-derived suppressor cells and regulatory T cells in the tumor microenvironment, and activation of tumor-associated vascular endothelial cells in association with elevated levels of Type-1 tumor-infiltrating lymphocytes. When combined with EphA2-specific active vaccination or the adoptive transfer of EphA2-specific CD8+ T cells, 17-DMAG cotreatment yielded a superior tumor therapeutic regimen that was capable of rendering animals free of disease. Taken together, our findings indicate that 17-DMAG functions as an immune adjuvant in the context of vaccines targeting EphA2.
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Affiliation(s)
- Aparna Rao
- Department of Immunology, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania 15213, USA
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Fukumoto R, Kiang JG. Geldanamycin analog 17-DMAG limits apoptosis in human peripheral blood cells by inhibition of p53 activation and its interaction with heat-shock protein 90 kDa after exposure to ionizing radiation. Radiat Res 2011; 176:333-45. [PMID: 21663398 DOI: 10.1667/rr2534.1] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Exposure to ionizing radiation induces p53, and its inhibition improves mouse survival. We tested the effect of 17-dimethylamino-ethylamino-17-demethoxygeldanamycin (17-DMAG) on p53 expression and function after radiation exposure. 17-DMAG, a heat-shock protein 90 (Hsp90) inhibitor, protects human T cells from ionizing radiation-induced apoptosis by inhibiting inducible nitric oxide synthase (iNOS) and subsequent caspase-3 activation. Using ex vivo human peripheral blood mononuclear cells, we found that ionizing radiation increased p53 accumulation, acute p53 phosphorylation, Bax expression and caspase-3/7 activation in a radiation dose- and time postirradiation-dependent manner. 17-DMAG inhibited these increases in a concentration-dependent manner (IC(50) = 0.93 ± 0.01 µM). Using in vitro models, we determined that inhibition of p53 by genetic knockout resulted in lower levels of caspase-3/7 activity 1 day after irradiation and enhanced survival at 10 days. Analysis of p53-Hsp90 interaction in ex vivo cell lysates indicated that the binding between the two molecules occurred after irradiation but 17-DMAG prevented the binding. Taken together, these results suggest the presence of p53 phosphorylation and Hsp90-dependent p53 stabilization after acute irradiation. Hsp90 inhibitors such as 17-DMAG may prove useful with radiation-based cancer therapy as well as for general radioprotection.
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Affiliation(s)
- Risaku Fukumoto
- Radiation Combined Injury Program, Armed Forces Radiobiology Research Institute, Bethesda, MD 20889-5603, USA
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