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Cui W, Hull L, Zizzo A, Wang L, Lin B, Zhai M, Kumar VP, Xiao M. The Roles of IL-18 in a Realistic Partial Body Irradiation with 5% Bone Marrow Sparing (PBI/BM5) Model. TOXICS 2023; 12:5. [PMID: 38276718 PMCID: PMC10819571 DOI: 10.3390/toxics12010005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/27/2023] [Revised: 12/13/2023] [Accepted: 12/15/2023] [Indexed: 01/27/2024]
Abstract
IL-18 has been shown to play important roles in response to total body irradiation. However, homogenous total body irradiation is not a realistic model to reflect the radiation exposure in a real nuclear event. To further study the roles of IL-18 in a real nuclear scenario, we developed a mouse partial body irradiation with 5% bone marrow sparing (PBI/BM5) model to mimic the inhomogeneous radiation exposure. We established the dose response curves of PBI/BM5 using different radiation doses ranging from 12 to 16 Gy. Using the PBI/BM5 model, we showed that IL-18 knockout mice were significantly more radiation resistant than the wild-type mice at 14.73 Gy. We further studied the hematopoietic changes using a complete blood count, bone marrow colony-forming assays, and serum cytokine assays on the mice exposed to PBI/BM5 with IL-18BP treatment and wild-type/IL-18 knockout mice. In conclusion, our data suggest that IL-18 plays important roles in mouse survival in a realistic nuclear exposure model, potentially through the IL-18/IFNγ pathway.
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Affiliation(s)
- Wanchang Cui
- Armed Forces Radiobiology Research Institute, Uniformed Services University of the Health Sciences, Bethesda, MD 20889, USA
- The Henry M. Jackson Foundation for the Advancement of Military Medicine, Inc., Bethesda, MD 20817, USA
- Department of Pharmacology and Molecular Therapeutics, Uniformed Services University of the Health Sciences, Bethesda, MD 20814, USA
| | - Lisa Hull
- Armed Forces Radiobiology Research Institute, Uniformed Services University of the Health Sciences, Bethesda, MD 20889, USA
- The Henry M. Jackson Foundation for the Advancement of Military Medicine, Inc., Bethesda, MD 20817, USA
| | - Alex Zizzo
- Armed Forces Radiobiology Research Institute, Uniformed Services University of the Health Sciences, Bethesda, MD 20889, USA
| | - Li Wang
- Armed Forces Radiobiology Research Institute, Uniformed Services University of the Health Sciences, Bethesda, MD 20889, USA
- The Henry M. Jackson Foundation for the Advancement of Military Medicine, Inc., Bethesda, MD 20817, USA
- Department of Pathology, Uniformed Services University of the Health Sciences, Bethesda, MD 20814, USA
| | - Bin Lin
- Armed Forces Radiobiology Research Institute, Uniformed Services University of the Health Sciences, Bethesda, MD 20889, USA
- The Henry M. Jackson Foundation for the Advancement of Military Medicine, Inc., Bethesda, MD 20817, USA
| | - Min Zhai
- Armed Forces Radiobiology Research Institute, Uniformed Services University of the Health Sciences, Bethesda, MD 20889, USA
- The Henry M. Jackson Foundation for the Advancement of Military Medicine, Inc., Bethesda, MD 20817, USA
| | - Vidya P. Kumar
- Armed Forces Radiobiology Research Institute, Uniformed Services University of the Health Sciences, Bethesda, MD 20889, USA
- The Henry M. Jackson Foundation for the Advancement of Military Medicine, Inc., Bethesda, MD 20817, USA
| | - Mang Xiao
- Armed Forces Radiobiology Research Institute, Uniformed Services University of the Health Sciences, Bethesda, MD 20889, USA
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Xiao Y, Zhang TS, Li YH, Liu CF, Yang SJ, Zeng LT, Huang SH, Deng XY, Peng L. Memantine Promotes Bactericidal Effect of Neutrophils Against Infection with Pseudomonas aeruginosa and Its Drug-Resistant Strain, by Improving Reactive Oxygen Species Generation. Microb Drug Resist 2021; 28:7-17. [PMID: 34357802 DOI: 10.1089/mdr.2020.0511] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Pseudomonas aeruginosa is an opportunistic pathogen, which usually presents multiple antibiotic resistance. Host-directed therapy involves modulating the host defense system and the interplay between innate and adaptive immunity is a new strategy for designing anti-infection drugs. Memantine (MEM), a drug used to treat Alzheimer's disease, has a good inhibitory effect on neonatal mice with Escherichia coli-associated bacteremia and meningitis; however, the inhibitory effect and mechanisms of MEM against P. aeruginosa infection remain unclear. Here, we investigated whether MEM could inhibit P. aeruginosa infection and explored the potential mechanisms. MEM significantly promoted the bactericidal effect of neutrophils against P. aeruginosa and its drug-resistant strain. The combination index of MEM and amikacin (AMK) was <1. In vivo experiments showed that the bacteremia and inflammation severities in the MEM-treated group were less than those in the untreated group, and the bacterial load in the organs was significantly less than that in the control group. Combining MEM with the reactive oxygen species (ROS) inhibitor, N-acetyl-l-cysteine, weakened the anti-infective effect of MEM. MEM increased the expression of NADPH p67phox and promoted neutrophilic ROS production. Deleting the p67phox gene significantly weakened the effects of MEM on ROS generation and improving bactericidal effect of neutrophils. In conclusion, MEM promoted the bactericidal effect of neutrophils against P. aeruginosa and its drug-resistant strain, and had a synergistic antibacterial effect when combined with AMK. MEM may exert its anti-infective effects by promoting neutrophilic bactericidal activity via increasing the expression level of p67phox and further stimulating ROS generation.
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Affiliation(s)
- Yi Xiao
- Guangzhou Key Laboratory of Enhanced Recovery After Abdominal Surgery, Department of Clinical Laboratory, The Fifth Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Tie-Song Zhang
- Kunming Key Laboratory of Children Infection and Immunity, Yunnan Institute of Pediatrics, Kunming Children's Hospital, Kunming, China
| | - Ying-Hua Li
- Gynecologic Oncology Ward III, Hunan Cancer Hospital, Changsha, China
| | - Chen-Fei Liu
- Guangzhou Key Laboratory of Enhanced Recovery After Abdominal Surgery, Department of Clinical Laboratory, The Fifth Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Shao-Jie Yang
- Department of Microbiology, Guangdong Provincial Key Laboratory of Tropical Diseases, Southern Medical University, Guangzhou, China
| | - Li-Ting Zeng
- Guangzhou Key Laboratory of Enhanced Recovery After Abdominal Surgery, Department of Clinical Laboratory, The Fifth Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Sheng-He Huang
- Kunming Key Laboratory of Children Infection and Immunity, Yunnan Institute of Pediatrics, Kunming Children's Hospital, Kunming, China.,Department of Microbiology, Guangdong Provincial Key Laboratory of Tropical Diseases, Southern Medical University, Guangzhou, China.,Department of Pediatrics, Saban Research Institute, University of Southern California, Children's Hospital Los Angeles, Los Angeles, California, USA
| | - Xiao-Yan Deng
- KingMed School of Laboratory Medicine, Guangzhou Medical University, Guangzhou, China
| | - Liang Peng
- Guangzhou Key Laboratory of Enhanced Recovery After Abdominal Surgery, Department of Clinical Laboratory, The Fifth Affiliated Hospital of Guangzhou Medical University, Guangzhou, China.,KingMed School of Laboratory Medicine, Guangzhou Medical University, Guangzhou, China
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Travis OK, Baik C, Tardo GA, Amaral L, Jackson C, Greer M, Giachelli C, Ibrahim T, Herrock OT, Williams JM, Cornelius DC. Adoptive transfer of placental ischemia-stimulated natural killer cells causes a preeclampsia-like phenotype in pregnant rats. Am J Reprod Immunol 2021; 85:e13386. [PMID: 33315281 PMCID: PMC8131208 DOI: 10.1111/aji.13386] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2020] [Revised: 10/21/2020] [Accepted: 12/09/2020] [Indexed: 12/14/2022] Open
Abstract
PROBLEM The Reduced Uterine Perfusion Pressure (RUPP) rat model of placental ischemia recapitulates many characteristics of preeclampsia including maternal hypertension, intrauterine growth restriction (IUGR), and increased cytolytic natural killer cells (cNKs). While we have previously shown a 5-fold higher cytotoxicity of RUPP NKs versus normal pregnant NKs, their role in RUPP pathophysiology remains unclear. In this study, we tested the hypotheses that (1) adoptive transfer of RUPP-stimulated NKs will induce maternal hypertension and IUGR in normal pregnant control (Sham) rats and (2) adoptive transfer of Sham NKs will attenuate maternal hypertension and IUGR in RUPP rats. METHOD OF STUDY On gestation day (GD)14, vehicle or 5 × 106 RUPP NKs were infused i.v. into a subset of Sham rats (Sham+RUPP NK), and vehicle or 5 × 106 Sham NKs were infused i.v. into a subset of RUPP rats (RUPP+Sham NK; n = 12/group). On GD18, Uterine Artery Resistance Index (UARI) was measured. On GD19, mean arterial pressure (MAP) was measured, animals were sacrificed, and blood and tissues were collected for analysis. RESULTS Adoptive transfer of RUPP NKs into Sham rats resulted in elevated NK activation, UARI, placental oxidative stress, and preproendothelin expression as well as reduced circulating nitrate/nitrite. This led to maternal hypertension and IUGR. RUPP recipients of Sham NKs demonstrated normalized NK activation, sFlt-1, circulating and placental VEGF, and UARI, which led to improved maternal blood pressure and normal fetal growth. CONCLUSION These data suggest a direct role for cNKs in causing preeclampsia pathophysiology and a role for normal NKs to improve maternal outcomes and IUGR during late gestation.
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Affiliation(s)
- Olivia K Travis
- Department of Pharmacology and Toxicology, University of Mississippi Medical Center
| | - Cedar Baik
- Department of Emergency Medicine University of Mississippi Medical Center
| | - Geilda A Tardo
- Department of Emergency Medicine University of Mississippi Medical Center
| | - Lorena Amaral
- Department of Pharmacology and Toxicology, University of Mississippi Medical Center
| | - Carmilya Jackson
- Department of Emergency Medicine University of Mississippi Medical Center
| | - Mallory Greer
- Department of Pharmacology and Toxicology, University of Mississippi Medical Center
| | - Chelsea Giachelli
- Department of Emergency Medicine University of Mississippi Medical Center
| | - Tarek Ibrahim
- Department of Pharmacology and Toxicology, University of Mississippi Medical Center
| | - Owen T. Herrock
- Department of Pharmacology and Toxicology, University of Mississippi Medical Center
| | - Jan M Williams
- Department of Pharmacology and Toxicology, University of Mississippi Medical Center
| | - Denise C Cornelius
- Department of Pharmacology and Toxicology, University of Mississippi Medical Center
- Department of Emergency Medicine University of Mississippi Medical Center
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IL-18 binding protein (IL-18BP) as a novel radiation countermeasure after radiation exposure in mice. Sci Rep 2020; 10:18674. [PMID: 33122671 PMCID: PMC7596073 DOI: 10.1038/s41598-020-75675-5] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2020] [Accepted: 10/07/2020] [Indexed: 12/22/2022] Open
Abstract
Recent studies suggested that radiation exposure causes local and systemic inflammatory responses and induces cell and tissue damage. We have reported that IL-18 plays an important role in radiation-induced injury. Here, we demonstrate that IL-18 binding protein (IL-18BP), a natural antagonist of IL-18, was significantly increased (1.7-63 fold) in mouse serum on day 1 after 0.5-10 Gy TBI. However, this high level of IL-18BP was not sufficient to neutralize the active IL-18 in irradiated mice, resulting in a radiation dose-dependent free IL-18 increase in these mice's serum which led to pathological alterations to the irradiated cells and tissues and finally caused animal death. Administration of recombinant human (rh) IL-18BP (1.5 mg/kg) with single (24, 48 or 72 h post-TBI) or double doses (48 h and 5 days post-TBI) subcutaneous (SC) injection increased 30-day survival of CD2F1 mice after 9 Gy TBI 12.5-25% compared with the vehicle control treated group, respectively. Furthermore, the mitigative effects of rhIL-18BP included balancing the ratio of IL-18/IL-18BP and decreasing the free IL-18 levels in irradiated mouse serum and significantly increasing blood cell counts, BM hematopoietic cellularity and stem and progenitor cell clonogenicity in mouse BM. Furthermore, IL-18BP treatment inhibited the IL-18 downstream target interferon (IFN)-γ expression in mouse BM, decreased reactive oxygen species (ROS) level in the irradiated mouse heart tissues, attenuated the stress responsive factor GDF-15 (growth differentiation factor-15) and increased the intestine protector citrulline level in total body irradiated mouse serum, implicating that IL-18BP may protect multiple organs from radiation-induced inflammation and oxidative stress. Our data suggest that IL-18 plays a key role in radiation-induced cell and tissue damage and dysfunction; and for the first time demonstrated that IL-18BP counters IL-18 activation and therefore may mitigate/treat radiation-induced multiple organ injuries and increase animal survival with a wider therapeutic window from 24 h and beyond after lethal doses of radiation exposure.
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Pomposello MM, Nemes K, Mosovsky K. Dietary antioxidant seleno-L-methionine protects macrophages infected with Burkholderia thailandensis. PLoS One 2020; 15:e0238174. [PMID: 32881891 PMCID: PMC7470333 DOI: 10.1371/journal.pone.0238174] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2020] [Accepted: 08/11/2020] [Indexed: 12/29/2022] Open
Abstract
Burkholderia pseudomallei is a facultative intracellular pathogen and the causative agent of melioidosis, a potentially life-threatening disease endemic in Southeast Asia and Northern Australia. Treatment of melioidosis is a long and costly process and the pathogen is inherently resistant to several classes of antibiotics, therefore there is a need for new treatments that can help combat the pathogen. Previous work has shown that the combination of interferon-gamma, an immune system activator, and the antibiotic ceftazidime synergistically reduced the bacterial burden of RAW 264.7 macrophages that had been infected with either B. pseudomallei or Burkholderia thailandensis. The mechanism of the interaction was found to be partially dependent on interferon-gamma-induced production of reactive oxygen species inside the macrophages. To further confirm the role of reactive oxygen species in the effectiveness of the combination treatment, we investigated the impact of the antioxidant and reactive oxygen species scavenger, seleno-L-methionine, on intracellular and extracellular bacterial burden of the infected macrophages. In a dose-dependent manner, high concentrations of seleno-L-methionine (1000 μM) were protective towards infected macrophages, resulting in a reduction of bacteria, on its own, that exceeded the reduction caused by the antibiotic alone and rivaled the effect of ceftazidime and interferon-gamma combined. Seleno-L-methionine treatment also resulted in improved viability of infected macrophages compared to untreated controls. We show that the protective effect of seleno-L-methionine was partly due to its inhibition of bacterial growth. In summary, our study shows a role for high dose seleno-L-methionine to protect and treat macrophages infected with B. thailandensis.
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Affiliation(s)
- Michelle M. Pomposello
- Department of Biological Sciences, Moravian College, Bethlehem, Pennsylvania, United States of America
| | - Kaitlyn Nemes
- Department of Biological Sciences, Moravian College, Bethlehem, Pennsylvania, United States of America
| | - Kara Mosovsky
- Department of Biological Sciences, Moravian College, Bethlehem, Pennsylvania, United States of America
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Duplantier AJ, Shurtleff AC, Miller C, Chiang CY, Panchal RG, Sunay M. Combating biothreat pathogens: ongoing efforts for countermeasure development and unique challenges. DRUG DISCOVERY TARGETING DRUG-RESISTANT BACTERIA 2020. [PMCID: PMC7258707 DOI: 10.1016/b978-0-12-818480-6.00007-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Research to discover and develop antibacterial and antiviral drugs with potent activity against pathogens of biothreat concern presents unique methodological and process-driven challenges. Herein, we review laboratory approaches for finding new antibodies, antibiotics, and antiviral molecules for pathogens of biothreat concern. Using high-throughput screening techniques, molecules that directly inhibit a pathogen’s entry, replication, or growth can be identified. Alternatively, molecules that target host proteins can be interesting targets for development when countering biothreat pathogens, due to the modulation of the host immune response or targeting proteins that interfere with the pathways required by the pathogen for replication. Monoclonal and cocktail antibody therapies approved by the Food and Drug Administration for countering anthrax and under development for treatment of Ebola virus infection are discussed. A comprehensive tabular review of current in vitro, in vivo, pharmacokinetic and efficacy datasets has been presented for biothreat pathogens of greatest concern. Finally, clinical trials and animal rule or traditional drug approval pathways are also reviewed. Opinions; interpretations; conclusions; and recommendations are those of the authors and are not necessarily endorsed by the US Army.
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Cell free mitochondrial DNA in serum and milk associated with bovine mastitis: a pilot study. Vet Res Commun 2018; 42:275-282. [DOI: 10.1007/s11259-018-9735-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2018] [Accepted: 08/20/2018] [Indexed: 01/23/2023]
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Huang L, Yang Z, Zhou XP, Wu JR. Burkholderia pseudomallei infection presenting with a lung abscess and osteomyelitis in an adult man: A case report. Medicine (Baltimore) 2018; 97:e12145. [PMID: 30170455 PMCID: PMC6392980 DOI: 10.1097/md.0000000000012145] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/25/2018] [Accepted: 08/08/2018] [Indexed: 11/30/2022] Open
Abstract
RATIONALE The frequency of infections caused by Burkholderia pseudomallei is increasing worldwide. Here, we report a case of B pseudomallei infection presenting with a lung abscess and osteomyelitis in an adult man. PATIENT CONCERNS A 38-year-old man presented with high-grade fever, productive cough, and chronic joint pain of the limbs. Examinations revealed multiple nodules, soft tissue mass shadows, pulmonary cavitation in bilateral lungs, and fluid and soft tissue swelling in bilateral hips. DIAGNOSES The microbiologic diagnosis based on a positive culture revealed the etiologic agent to be B pseudomallei. INTERVENTIONS The patient was treated with intravenous ceftazidime and levofloxacin, and out-of-hospital treatment continued with oral cotrimoxazole. OUTCOMES The patient responded well to the treatment. LESSONS subsections Because of its increasing incidence, B pseudomallei infection should be highly suspected among employees who work in laboratories and healthcare facilities. Misdiagnosis can lead to treatment failure and high mortality rates, especially among individuals working in laboratories in non-endemic areas; therefore, early and accurate diagnosis of B pseudomallei infection is essential. Adequate antimicrobial treatment and long-term follow-up are imperative to reduce morbidity and mortality.
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Affiliation(s)
| | - Zhi Yang
- Department of Nuclear Medicine, The Affiliated Tumor Hospital of Guangxi Medical University
| | - Xiao-Ping Zhou
- Department of Clinical Laboratory, The First Affiliated Hospital of Guangxi University of Chinese Medicine, Nanning, Guangxi, China
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Van Acker H, Coenye T. The Role of Reactive Oxygen Species in Antibiotic-Mediated Killing of Bacteria. Trends Microbiol 2017; 25:456-466. [PMID: 28089288 DOI: 10.1016/j.tim.2016.12.008] [Citation(s) in RCA: 339] [Impact Index Per Article: 48.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2016] [Revised: 12/09/2016] [Accepted: 12/15/2016] [Indexed: 11/26/2022]
Abstract
Recently, it was proposed that there is a common mechanism behind the activity of bactericidal antibiotics, involving the production of reactive oxygen species (ROS). However, the involvement of ROS in antibiotic-mediated killing has become the subject of much debate. In the present review, we provide an overview of the data supporting the ROS hypothesis; we also present data that explain the contradictory results often obtained when studying antibiotic-induced ROS production. For this latter aspect we will focus on the importance of taking the experimental setup into consideration and on the importance of some technical aspects of the assays typically used. Finally, we discuss the link between ROS production and toxin-antitoxin modules, and present an overview of implications for treatment.
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Affiliation(s)
- Heleen Van Acker
- Laboratory of Pharmaceutical Microbiology, Ghent University, Ghent, Belgium
| | - Tom Coenye
- Laboratory of Pharmaceutical Microbiology, Ghent University, Ghent, Belgium.
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Immune profiling of the progression of a BALB/c mouse aerosol infection by Burkholderia pseudomallei and the therapeutic implications of targeting HMGB1. Int J Infect Dis 2015; 40:1-8. [DOI: 10.1016/j.ijid.2015.09.003] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2015] [Revised: 07/20/2015] [Accepted: 09/01/2015] [Indexed: 11/21/2022] Open
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