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Munalisa R, Lien TS, Tsai PY, Sun DS, Cheng CF, Wu WS, Li CC, Hu CT, Tsai KW, Lee YL, Chou YC, Chang HH. Restraint Stress-Induced Neutrophil Inflammation Contributes to Concurrent Gastrointestinal Injury in Mice. Int J Mol Sci 2024; 25:5261. [PMID: 38791301 PMCID: PMC11121713 DOI: 10.3390/ijms25105261] [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: 04/16/2024] [Revised: 05/06/2024] [Accepted: 05/08/2024] [Indexed: 05/26/2024] Open
Abstract
Psychological stress increases risk of gastrointestinal tract diseases. However, the mechanism behind stress-induced gastrointestinal injury is not well understood. The objective of our study is to elucidate the putative mechanism of stress-induced gastrointestinal injury and develop an intervention strategy. To achieve this, we employed the restraint stress mouse model, a well-established method to study the pathophysiological changes associated with psychological stress in mice. By orally administering gut-nonabsorbable Evans blue dye and monitoring its plasma levels, we were able to track the progression of gastrointestinal injury in live mice. Additionally, flow cytometry was utilized to assess the viability, death, and inflammatory status of splenic leukocytes, providing insights into the stress-induced impact on the innate immune system associated with stress-induced gastrointestinal injury. Our findings reveal that neutrophils represent the primary innate immune leukocyte lineage responsible for stress-induced inflammation. Splenic neutrophils exhibited elevated expression levels of the pro-inflammatory cytokine IL-1, cellular reactive oxygen species, mitochondrial burden, and cell death following stress challenge compared to other innate immune cells such as macrophages, monocytes, and dendritic cells. Regulated cell death analysis indicated that NETosis is the predominant stress-induced cell death response among other analyzed regulated cell death pathways. NETosis culminates in the formation and release of neutrophil extracellular traps, which play a crucial role in modulating inflammation by binding to pathogens. Treatment with the NETosis inhibitor GSK484 rescued stress-induced neutrophil extracellular trap release and gastrointestinal injury, highlighting the involvement of neutrophil extracellular traps in stress-induced gastrointestinal inflammation. Our results suggest that neutrophil NETosis could serve as a promising drug target for managing psychological stress-induced gastrointestinal injuries.
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Grants
- 104-2320-B-320 -009 -MY3, 107-2311-B-320-002-MY3, 111-2320-B320-006-MY3, 112-2320-B-320-007 National Science and Technology Council, Taiwan
- TCMMP104-06, TCMMP108-04, TCMMP 111-01, TCAS111-02, TCAS-112-02, TCAS113-04, TCRD112-033, TCRD113-041 Tzu-Chi Medical Foundation
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Affiliation(s)
- Rina Munalisa
- Department of Molecular Biology and Human Genetics, Tzu-Chi University, Hualien 970, Taiwan; (R.M.); (T.-S.L.); (P.-Y.T.); (D.-S.S.)
| | - Te-Sheng Lien
- Department of Molecular Biology and Human Genetics, Tzu-Chi University, Hualien 970, Taiwan; (R.M.); (T.-S.L.); (P.-Y.T.); (D.-S.S.)
| | - Ping-Yeh Tsai
- Department of Molecular Biology and Human Genetics, Tzu-Chi University, Hualien 970, Taiwan; (R.M.); (T.-S.L.); (P.-Y.T.); (D.-S.S.)
| | - Der-Shan Sun
- Department of Molecular Biology and Human Genetics, Tzu-Chi University, Hualien 970, Taiwan; (R.M.); (T.-S.L.); (P.-Y.T.); (D.-S.S.)
| | - Ching-Feng Cheng
- Department of Pediatrics, Taipei Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, New Taipei City 231, Taiwan;
- Institute of Biomedical Sciences, Academia Sinica, Taipei 115, Taiwan;
| | - Wen-Sheng Wu
- Division of General Surgery, Department of Surgery, Hualien Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, Hualien 970, Taiwan
- Department of Laboratory Medicine and Biotechnology, College of Medicine, Tzu Chi University, Hualien 970, Taiwan
| | - Chi-Cheng Li
- Department of Hematology and Oncology, Hualien Tzu Chi Hospital, Buddha Tzu Chi Medical Foundation, Hualien 970, Taiwan
- Center of Stem Cell & Precision Medicine, Hualien Tzu Chi Hospital, Buddha Tzu Chi Medical Foundation, Hualien 970, Taiwan
| | - Chi-Tan Hu
- Research Center for Hepatology and Department of Gastroenterology, Hualien Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, Hualien 970, Taiwan
| | - Kuo-Wang Tsai
- Department of Research, Taipei Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, New Taipei City 231, Taiwan;
| | - Yungling Leo Lee
- Institute of Biomedical Sciences, Academia Sinica, Taipei 115, Taiwan;
- College of Public Health, China Medical University, Taichung 404, Taiwan
| | - Yu-Chi Chou
- Biomedical Translation Research Center, Academia Sinica, Taipei 115, Taiwan;
| | - Hsin-Hou Chang
- Department of Molecular Biology and Human Genetics, Tzu-Chi University, Hualien 970, Taiwan; (R.M.); (T.-S.L.); (P.-Y.T.); (D.-S.S.)
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Al Qutami F, AlHalabi W, Vijayakumar A, Rawat SS, Mossa AH, Jayakumar MN, Samreen B, Hachim MY. Characterizing the Inflammatory Profile of Neutrophil-Rich Triple-Negative Breast Cancer. Cancers (Basel) 2024; 16:747. [PMID: 38398138 PMCID: PMC10886617 DOI: 10.3390/cancers16040747] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2023] [Revised: 01/31/2024] [Accepted: 02/01/2024] [Indexed: 02/25/2024] Open
Abstract
Breast cancer (BC) is one of the most common types of cancer in women in the United Arab Emirates. Immunogenic tumours, such as triple-negative breast cancer (TNBC), show increased neutrophil infiltration, which is associated with poor prognosis and limited efficacy of immunotherapy. This study aims to investigate in vitro the bidirectional effect of neutrophils on metastatic TNBC (MDA-MB-231) compared to less-metastatic luminal breast cancer (MCF-7) cell lines. We found that BC cells or their conditioned medium (CM) reduced the viability of neutrophil-like cells (HL60). This was supported by increased cellular stress and NETosis in differentiated HL60 cells (dHL60) upon exposure to MDA-MB-231 compared to MCF-7-CM using nucleic acid staining essays. Flow cytometry showed comparable expression of inflammatory markers by polymorphonuclear cells (PMN) when treated with MDA-MB-231-CM and standard polarizing cocktails. Furthermore, MDA-MB-231-CM triggered an inflammatory pattern with evidence of stronger adhesion (CD62L) and degranulation (CD11b and CD66b) phenotypes. The proinflammatory polarization of dHL60 by MDA-MB-231-CM was additionally confirmed by the elevated CD54 expression, myeloperoxidase, and CD11b protein levels, which matched an increased transwell migratory capacity. In conclusion, BC might use neutrophils to their benefit through NETosis and complement system activation, which makes this crosstalk a potential mechanism for understanding tumour progression.
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Affiliation(s)
- Fatma Al Qutami
- Department of Medicine, Mohammed Bin Rashid University of Medicine and Health Sciences, Dubai P.O. Box 505055, United Arab Emirates; (F.A.Q.); (W.A.); (A.V.); (S.S.R.); (B.S.)
| | - Walaa AlHalabi
- Department of Medicine, Mohammed Bin Rashid University of Medicine and Health Sciences, Dubai P.O. Box 505055, United Arab Emirates; (F.A.Q.); (W.A.); (A.V.); (S.S.R.); (B.S.)
| | - Aswathy Vijayakumar
- Department of Medicine, Mohammed Bin Rashid University of Medicine and Health Sciences, Dubai P.O. Box 505055, United Arab Emirates; (F.A.Q.); (W.A.); (A.V.); (S.S.R.); (B.S.)
| | - Surendra Singh Rawat
- Department of Medicine, Mohammed Bin Rashid University of Medicine and Health Sciences, Dubai P.O. Box 505055, United Arab Emirates; (F.A.Q.); (W.A.); (A.V.); (S.S.R.); (B.S.)
| | - Abubakr H. Mossa
- Sharjah Institute for Medical Research, College of Medicine, University of Sharjah, Sharjah P.O. Box 27272, United Arab Emirates; (A.H.M.); (M.N.J.)
| | - Manju Nidagodu Jayakumar
- Sharjah Institute for Medical Research, College of Medicine, University of Sharjah, Sharjah P.O. Box 27272, United Arab Emirates; (A.H.M.); (M.N.J.)
| | - Baila Samreen
- Department of Medicine, Mohammed Bin Rashid University of Medicine and Health Sciences, Dubai P.O. Box 505055, United Arab Emirates; (F.A.Q.); (W.A.); (A.V.); (S.S.R.); (B.S.)
| | - Mahmood Y. Hachim
- Department of Medicine, Mohammed Bin Rashid University of Medicine and Health Sciences, Dubai P.O. Box 505055, United Arab Emirates; (F.A.Q.); (W.A.); (A.V.); (S.S.R.); (B.S.)
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Sounbuli K, Alekseeva LA, Markov OV, Mironova NL. A Comparative Study of Different Protocols for Isolation of Murine Neutrophils from Bone Marrow and Spleen. Int J Mol Sci 2023; 24:17273. [PMID: 38139101 PMCID: PMC10743699 DOI: 10.3390/ijms242417273] [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: 10/10/2023] [Revised: 12/06/2023] [Accepted: 12/07/2023] [Indexed: 12/24/2023] Open
Abstract
Neutrophils are considered as the main player in innate immunity. In the last few years, it has been shown that they are involved in different physiological conditions and diseases. However, progress in the field of neutrophil biology is relatively slow due to existing difficulties in neutrophil isolation and maintenance in culture. Here we compare four protocols based on density-gradient and immunomagnetic methods for isolation of murine neutrophils from bone marrow and spleen. Neutrophil isolation was performed using Ficoll 1.077/1.119 g/mL density gradient, Ficoll 1.083/1.090/1.110 g/mL density gradient and immunomagnetic method of negative and positive selection. The different protocols were compared with respect to sample purity, cell viability, yield, and cost. The functionality of isolated neutrophils was checked by NETosis analysis and neutrophil oxidative burst test. Obtained data revealed that given purity/yield/viability/cost ratio the protocol based on cell centrifugation on Ficoll 1.077/1.119 g/mL density gradient is recommended for isolation of neutrophils from bone marrow, whereas immunomagnetic method of positive selection using Dynabeads is recommended for isolation of splenic neutrophils.
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Affiliation(s)
- Khetam Sounbuli
- Institute of Chemical Biology and Fundamental Medicine SB RAS, Lavrentiev Ave. 8, 630090 Novosibirsk, Russia; (K.S.); (L.A.A.); (O.V.M.)
- Faculty of Natural Sciences, Novosibirsk State University, 630090 Novosibirsk, Russia
| | - Ludmila A. Alekseeva
- Institute of Chemical Biology and Fundamental Medicine SB RAS, Lavrentiev Ave. 8, 630090 Novosibirsk, Russia; (K.S.); (L.A.A.); (O.V.M.)
| | - Oleg V. Markov
- Institute of Chemical Biology and Fundamental Medicine SB RAS, Lavrentiev Ave. 8, 630090 Novosibirsk, Russia; (K.S.); (L.A.A.); (O.V.M.)
| | - Nadezhda L. Mironova
- Institute of Chemical Biology and Fundamental Medicine SB RAS, Lavrentiev Ave. 8, 630090 Novosibirsk, Russia; (K.S.); (L.A.A.); (O.V.M.)
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Liu Y, Xiang C, Que Z, Li C, Wang W, Yin L, Chu C, Zhou Y. Neutrophil heterogeneity and aging: implications for COVID-19 and wound healing. Front Immunol 2023; 14:1201651. [PMID: 38090596 PMCID: PMC10715311 DOI: 10.3389/fimmu.2023.1201651] [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: 04/06/2023] [Accepted: 08/02/2023] [Indexed: 12/18/2023] Open
Abstract
Neutrophils play a critical role in the immune response to infection and tissue injury. However, recent studies have shown that neutrophils are a heterogeneous population with distinct subtypes that differ in their functional properties. Moreover, aging can alter neutrophil function and exacerbate immune dysregulation. In this review, we discuss the concept of neutrophil heterogeneity and how it may be affected by aging. We then examine the implications of neutrophil heterogeneity and aging for COVID-19 pathogenesis and wound healing. Specifically, we summarize the evidence for neutrophil involvement in COVID-19 and the potential mechanisms underlying neutrophil recruitment and activation in this disease. We also review the literature on the role of neutrophils in the wound healing process and how aging and neutrophil heterogeneity may impact wound healing outcomes. Finally, we discuss the potential for neutrophil-targeted therapies to improve clinical outcomes in COVID-19 and wound healing.
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Affiliation(s)
| | | | | | | | - Wen Wang
- Department of Hematology, Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China; Medical Cosmetic Center, Chengdu Second People's Hospital; Minhang Hospital, Fudan University, Shanghai, China
| | - Lijuan Yin
- Department of Hematology, Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China; Medical Cosmetic Center, Chengdu Second People's Hospital; Minhang Hospital, Fudan University, Shanghai, China
| | - Chenyu Chu
- Department of Hematology, Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China; Medical Cosmetic Center, Chengdu Second People's Hospital; Minhang Hospital, Fudan University, Shanghai, China
| | - Yin Zhou
- Department of Hematology, Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China; Medical Cosmetic Center, Chengdu Second People's Hospital; Minhang Hospital, Fudan University, Shanghai, China
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Liang C, Liu L, Bao S, Yao Z, Bai Q, Fu P, Liu X, Zhang JH, Wang G. Neuroprotection by Nrf2 via modulating microglial phenotype and phagocytosis after intracerebral hemorrhage. Heliyon 2023; 9:e13777. [PMID: 36852060 PMCID: PMC9957781 DOI: 10.1016/j.heliyon.2023.e13777] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2022] [Revised: 01/02/2023] [Accepted: 02/10/2023] [Indexed: 02/18/2023] Open
Abstract
Activated microglia are divided into pro-inflammatory and anti-inflammatory functional states. In anti-inflammatory state, activated microglia contribute to phagocytosis, neural repair and anti-inflammation. Nrf2 as a major endogenous regulator in hematoma clearance after intracerebral hemorrhage (ICH) has received much attention. This study aims to investigate the mechanism underlying Nrf2-mediated regulation of microglial phenotype and phagocytosis in hematoma clearance after ICH. In vitro experiments, BV-2 cells were assigned to normal group and administration group (Nrf2-siRNA, Nrf2 agonists Monascin and Xuezhikang). In vivo experiments, mice were divided into 5 groups: sham, ICH + vehicle, ICH + Nrf2-/-, ICH + Monascin and ICH + Xuezhikang. In vitro and in vivo, 72 h after administration of Monascin and Xuezhikang, the expression of Nrf2, inflammatory-associated factors such as Trem1, TNF-α and CD80, anti-inflammatory, neural repair and phagocytic associated factors such as Trem2, CD206 and BDNF were analyzed by the Western blot method. In vitro, fluorescent latex beads or erythrocytes were uptaken by BV-2 cells in order to study microglial phagocytic ability. In vivo, hemoglobin levels reflect the hematoma volume. In this study, Nrf2 agonists (Monascin and Xuezhikang) upregulated the expression of Trem2, CD206 and BDNF while decreased the expression of Trem1, TNF-α and CD80 both in vivo and in vitro. At the same time, after Monascin and Xuezhikang treatment, the phagocytic capacity of microglia increased in vitro, neurological deficits improved and hematoma volume lessened in vivo. These results were reversed in the Nrf2-siRNA or the Nrf2-/- mice. All these results indicated that Nrf2 enhanced hematoma clearance and neural repair, improved neurological outcomes through enhancing microglial phagocytosis and alleviating neuroinflammation.
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Key Words
- BDNF, Brain-derived neurotrophic factor
- CNS, Central nervous system
- DAMPs, Danger-associated molecular patterns
- HO-1,Heme oxygenase-1, Hp,Haptoglobin
- Hematoma clearance
- ICH, Intracerebral hemorrhage
- IFNγ,Interferon-gamma, IL-1β,Interleukin 1β
- Intracerebral hemorrhage
- MMP, Matrix metalloproteasesNF-κB,Nuclear factor-kappa light chain enhancer of activated B cells
- Microglial phenotype
- NO, Nitric oxide
- Nrf2
- Nrf2, Nuclear factor erythroid 2-related factor 2
- PPAR-ɤ, Peroxidase proliferator-activated receptor gamma
- Phagocytosis
- TLR4, Toll-like receptor 4
- TNFα, Tumor necrosis factor-α
- Trem1, Triggering receptors I expressed on myeloid cells
- Trem2, Triggering receptors II expressed on myeloid cells
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Affiliation(s)
- Chuntian Liang
- Department of Neurology, Shanxi Medical University, Taiyuan 030000, China
| | - Lirong Liu
- Department of Neurology, Shanxi Medical University, Taiyuan 030000, China.,People's Hospital of Yaodu District, Linfen 041000, China
| | - Shuangjin Bao
- Department of Pathology and Pathophysiology, Basic Medical College, Shanxi Medical University, Taiyuan 030000, China
| | - Zhenjia Yao
- Department of Neurology, Shanxi Medical University, Taiyuan 030000, China
| | - Qinqin Bai
- Department of Neurology, Shanxi Medical University, Taiyuan 030000, China
| | - Pengcheng Fu
- Department of Neurology, Shenzhen Longhua District Central Hospital, Shenzhen 518000, China
| | - Xiangyu Liu
- Department of Neurology, Shenzhen Longhua District Central Hospital, Shenzhen 518000, China
| | - John H Zhang
- Department of Physiology and Pharmacology, Loma Linda University School of Medicine, Loma Linda, CA, USA.,Department of Anesthesiology, Loma Linda University School of Medicine, Loma Linda, CA, USA
| | - Gaiqing Wang
- Department of Neurology, Shanxi Medical University, Taiyuan 030000, China.,Department of Neurology, Sanya Central Hospital (Haian Third People's Hospital), Hainan Medical University, Sanya 572000, China
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Schuermann LE, Bergmann CB, Goetzman H, Caldwell CC, Satish L. Heat-killed probiotic Lactobacillus plantarum affects the function of neutrophils but does not improve survival in murine burn injury. Burns 2022; 49:877-888. [PMID: 35850881 DOI: 10.1016/j.burns.2022.06.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2021] [Revised: 06/22/2022] [Accepted: 06/27/2022] [Indexed: 11/30/2022]
Abstract
Probiotics have become of interest as therapeutics in trauma or sepsis-induced inflammation due to their ability to affects the immune response. However, their use is still under debate due to the potential risk of septicemia. Therefore, heat-killed probiotics offer a potential alternative, with recent research suggesting a comparable immunomodulating potential and increased safety. In a previous study, we demonstrated decreased mortality by administration of live Lactobacillus plantarum in a mouse burn-sepsis model. Neutrophils are an essential innate defense against pathogens. Therefore, our present study aims to understand the impact of heat-killed probiotic L. plantarum (HKLP) on neutrophil function. Utilizing an in vitro stimulation with HKLP and a burn-infection in vivo model, we determined that administration of HKLP induced significant release of granulocyte-colony stimulating factor (G-CSF) and stimulated the release of pro-and anti-inflammatory cytokines. HKLP had no impact on neutrophil function, such as phagocytosis, oxidative burst, and NETosis, but increased apoptosis and activated neutrophils. HKLP did not improve survival. Together, contrary to our hypothesis, heat-killed probiotics did not improve neutrophil function and survival outcome in a murine severe burn injury model.
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Affiliation(s)
- Lauren E Schuermann
- Research Department, Shriners Hospitals for Children-Cincinnati, Cincinnati, OH, USA
| | - Christian B Bergmann
- Division of Research, Department of Surgery, College of Medicine, University of Cincinnati, Cincinnati, OH, USA
| | - Holly Goetzman
- Division of Research, Department of Surgery, College of Medicine, University of Cincinnati, Cincinnati, OH, USA
| | - Charles C Caldwell
- Research Department, Shriners Hospitals for Children-Cincinnati, Cincinnati, OH, USA; Division of Research, Department of Surgery, College of Medicine, University of Cincinnati, Cincinnati, OH, USA
| | - Latha Satish
- Research Department, Shriners Hospitals for Children-Cincinnati, Cincinnati, OH, USA.
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Salyer CE, Bergmann CB, Hotchkiss RS, Crisologo PA, Caldwell CC. Functional Characterization of Neutrophils Allows Source Control Evaluation in a Murine Sepsis Model. J Surg Res 2022; 274:94-101. [PMID: 35134595 PMCID: PMC9038647 DOI: 10.1016/j.jss.2021.12.037] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2021] [Revised: 12/01/2021] [Accepted: 12/27/2021] [Indexed: 12/22/2022]
Abstract
INTRODUCTION Current surgical guidelines for the treatment of intra-abdominal sepsis recommend interventional source control as the key element of therapy, alongside resuscitation and antibiotic administration. Past trials attempted to predict the success of interventional source control to assess whether further interventional therapy is needed. However, no predictive score could be developed. MATERIALS AND METHODS We utilized an established murine abdominal sepsis model, the cecal ligation and puncture (CLP), and performed a successful surgical source control intervention after full development of sepsis, the CLP-excision (CLP/E). We then sought to evaluate the success of the source control by characterizing circulating neutrophil phenotype and functionality 24 h postintervention. RESULTS We showed a significant relative increase of neutrophils and a significant absolute and relative increase of activated neutrophils in septic mice. Source control with CLP/E restored these numbers back to baseline. Moreover, main neutrophil functions, the acidification of cell compartments, such as lysosomes, and the production of Tumor Necrosis Factor-alpha (TNF-α), were impaired in septic mice but restored after CLP/E intervention. CONCLUSIONS Neutrophil characterization by phenotyping and evaluating their functionality indicates successful source control in septic mice and can serve as a prognostic tool. These findings provide a rationale for the phenotypic and functional characterization of neutrophils in human patients with infection. Further studies will be needed to determine whether a predictive score for the assessment of successful surgical source control can be established.
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Affiliation(s)
- Christen E Salyer
- Division of Research, Department of Surgery, College of Medicine, University of Cincinnati, Cincinnati, Ohio
| | - Christian B Bergmann
- Division of Research, Department of Surgery, College of Medicine, University of Cincinnati, Cincinnati, Ohio
| | - Richard S Hotchkiss
- Department of Anesthesiology, Washington University School of Medicine, St. Louis, Missouri
| | - Peter A Crisologo
- Division of Podiatric Surgery, Department of Surgery, College of Medicine, University of Cincinnati, Cincinnati, Ohio
| | - Charles C Caldwell
- Division of Research, Department of Surgery, College of Medicine, University of Cincinnati, Cincinnati, Ohio.
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sEH-derived metabolites of linoleic acid drive pathologic inflammation while impairing key innate immune cell function in burn injury. Proc Natl Acad Sci U S A 2022; 119:e2120691119. [PMID: 35312372 PMCID: PMC9060469 DOI: 10.1073/pnas.2120691119] [Citation(s) in RCA: 23] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
Oxylipins alter immune cell function and potentially drive pathophysiology in burn and sepsis patients. Past and recent data reveal a correlation between increased systemic EpOME levels and reduced survival in human burn trauma and sepsis. This work extends these studies and provides evidence that the downstream sEH-derived metabolites, DiHOMEs, are driving worsening outcomes by altering the immune response. Inhibiting DiHOME metabolite formation with the sEH inhibitor, 1-trifluoromethoxyphenyl-3-(1-propionylpiperidin-4-yl) urea (TPPU), restored immune function by increasing immune cell survival and function. These data support the hypothesis that sEH-derived linoleic acid diols are responsible for increased mortality in burn and sepsis patients and also provide a rationale for testing the therapeutic blockage of DiHOME generation in burn and sepsis patients to improve their outcomes. Fatty acid composition in the Western diet has shifted from saturated to polyunsaturated fatty acids (PUFAs), and specifically to linoleic acid (LA, 18:2), which has gradually increased in the diet over the past 50 y to become the most abundant dietary fatty acid in human adipose tissue. PUFA-derived oxylipins regulate a variety of biological functions. The cytochrome P450 (CYP450)–formed epoxy fatty acid metabolites of LA (EpOMEs) are hydrolyzed by the soluble epoxide hydrolase enzyme (sEH) to dihydroxyoctadecenoic acids (DiHOMEs). DiHOMEs are considered cardioprotective at low concentrations but at higher levels have been implicated as vascular permeability and cytotoxic agents and are associated with acute respiratory distress syndrome in severe COVID-19 patients. High EpOME levels have also correlated with sepsis-related fatalities; however, those studies failed to monitor DiHOME levels. Considering the overlap of burn pathophysiology with these pathologies, the role of DiHOMEs in the immune response to burn injury was investigated. 12,13-DiHOME was found to facilitate the maturation and activation of stimulated neutrophils, while impeding monocyte and macrophage functionality and cytokine generation. In addition, DiHOME serum concentrations were significantly elevated in burn-injured mice and these increases were ablated by administration of 1-trifluoromethoxyphenyl-3-(1-propionylpiperidin-4-yl) urea (TPPU), a sEH inhibitor. TPPU also reduced necrosis of innate and adaptive immune cells in burned mice, in a dose-dependent manner. The findings suggest DiHOMEs are a key driver of immune cell dysfunction in severe burn injury through hyperinflammatory neutrophilic and impaired monocytic actions, and inhibition of sEH might be a promising therapeutic strategy to mitigate deleterious outcomes in burn patients.
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Chen X, Li X, Lu H, Xu Y, Wei Y, Cao K, Zhu Z, Chen M, Yu W. Mouse Model of Critical Persistent Inflammation, Immunosuppression, and Catabolism Syndrome. Shock 2022; 57:238-245. [PMID: 34678913 DOI: 10.1097/shk.0000000000001878] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
ABSTRACT Persistent inflammation, immunosuppression, and catabolism syndrome (PIICS) is a growing challenge in intensive care units (ICUs). PIICS causes a severe illness with high mortality. Currently, treatment is expensive, and the outcomes are dismal. Herein, we established a PIICS model to study the disease pathophysiology and its potential treatment. Using a modified sublethal cecal ligation and puncture (CLP) to induce sepsis (day 1) and the injection of lipopolysaccharide (LPS) to induce an aggravated inflammation response (day 11), CLP + LPS mice recapitulating PIICS features were successfully generated (day 14). Adult male mice were divided into CLP + LPS, CLP + daily chronic stress (DCS), CLP, DCS, LPS, and sham control groups. A survival curve was generated, and phenotypes were analyzed using markers for catabolism, inflammation, and immunosuppression. The CLP + LPS model showed two mortality peaks (after CLP and after LPS), whereas the CLP + DCS and CLP groups showed one peak. Surviving CLP + LPS mice exhibited significantly increased catabolism and inflammatory cytokine levels and aggravated inflammation, including organ inflammation. CLP + LPS mice exhibited strong immune suppression as evidenced by decreased splenic cluster of differentiation (CD)8+ and interferon-γ+CD8+ T cell counts and a concomitant and significant increase in the myeloid-derived suppressor cell population. This CLP+LPS-induced PIICS model differs from acute sepsis models, showing two mortality peaks and a protracted course of 14 days. Compared to previous PIICS models, ours shows a re-aggravated status and higher catabolism, inflammation, and immunosuppression levels. Our aim was to use the PIICS model to simulate PIICS pathophysiology and course in the ICU, enabling investigation of its mechanism and treatment.
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Affiliation(s)
- Xiancheng Chen
- Department of Critical Care Medicine, Nanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical School, Nanjing, Jiangsu Province, China
| | - Xiaojing Li
- Department of Rheumatology and Immunology, Nanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical School, Nanjing, Jiangsu Province, China
| | - Huimin Lu
- Department of Critical Care Medicine, Nanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical School, Nanjing, Jiangsu Province, China
| | - Yali Xu
- Department of Critical Care Medicine, Nanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical School, Nanjing, Jiangsu Province, China
| | - Yu Wei
- Department of Rheumatology and Immunology, Nanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical School, Nanjing, Jiangsu Province, China
| | - Ke Cao
- Department of Critical Care Medicine, Nanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical School, Nanjing, Jiangsu Province, China
| | - Zhanghua Zhu
- Department of Critical Care Medicine, Nanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical School, Nanjing, Jiangsu Province, China
| | - Ming Chen
- Department of Critical Care Medicine, Nanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical School, Nanjing, Jiangsu Province, China
| | - Wenkui Yu
- Department of Critical Care Medicine, Nanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical School, Nanjing, Jiangsu Province, China
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Hoffmann A, Haschka D, Valente de Souza L, Tymoszuk P, Seifert M, von Raffay L, Hilbe R, Petzer V, Moser PL, Nairz M, Weiss G. Baseline iron status and presence of anaemia determine the course of systemic Salmonella infection following oral iron supplementation in mice. EBioMedicine 2021; 71:103568. [PMID: 34488018 PMCID: PMC8426537 DOI: 10.1016/j.ebiom.2021.103568] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2021] [Revised: 07/29/2021] [Accepted: 08/18/2021] [Indexed: 01/02/2023] Open
Abstract
BACKGROUND Iron deficiency anaemia (IDA) is a major health concern. However, preventive iron supplementation in regions with high burden of infectious diseases resulted in an increase of infection related morbidity and mortality. METHODS We fed male C57BL/6N mice with either an iron deficient or an iron adequate diet. Next, they received oral iron supplementation or placebo followed by intraperitoneal infection with Salmonella Typhimurium (S.Tm). FINDINGS We found that mice with IDA had a poorer clinical outcome than mice on an iron adequate diet. Interestingly, iron supplementation of IDA mice resulted in higher bacterial burden in organs and shortened survival. Increased transferrin saturation and non-transferrin bound iron in the circulation together with low expression of ferroportin facilitated the access of the pathogen to iron and promoted bacterial growth. Anaemia, independent of iron supplementation, was correlated with reduced neutrophil counts and cytotoxic T cells. With iron supplementation, anaemia additionally correlated with increased splenic levels of the cytokine IL-10, which is suggestive for a weakened immune control to S.Tm infection. INTERPRETATION Supplementing iron to anaemic mice worsens the clinical course of bacterial infection. This can be traced back to increased iron delivery to bacteria along with an impaired anti-microbial immune response. Our findings may have important implications for iron supplementation strategies in areas with high endemic burden of infections, putting those individuals, who potentially profit most from iron supplementation for anaemia, at the highest risk for infections. FUNDING Financial support by the Christian Doppler Laboratory for Iron Metabolism and Anemia Research.
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Affiliation(s)
- Alexander Hoffmann
- Department of Internal Medicine II, Infectious Diseases, Immunology, Rheumatology, Medical University of Innsbruck, Anichstraße 35, Innsbruck A-6020, Austria; Christian Doppler Laboratory for Iron Metabolism and Anemia Research, Medical University of Innsbruck, Innsbruck A-6020, Austria
| | - David Haschka
- Department of Internal Medicine II, Infectious Diseases, Immunology, Rheumatology, Medical University of Innsbruck, Anichstraße 35, Innsbruck A-6020, Austria
| | - Lara Valente de Souza
- Department of Internal Medicine II, Infectious Diseases, Immunology, Rheumatology, Medical University of Innsbruck, Anichstraße 35, Innsbruck A-6020, Austria; Christian Doppler Laboratory for Iron Metabolism and Anemia Research, Medical University of Innsbruck, Innsbruck A-6020, Austria
| | - Piotr Tymoszuk
- Department of Internal Medicine II, Infectious Diseases, Immunology, Rheumatology, Medical University of Innsbruck, Anichstraße 35, Innsbruck A-6020, Austria
| | - Markus Seifert
- Department of Internal Medicine II, Infectious Diseases, Immunology, Rheumatology, Medical University of Innsbruck, Anichstraße 35, Innsbruck A-6020, Austria; Christian Doppler Laboratory for Iron Metabolism and Anemia Research, Medical University of Innsbruck, Innsbruck A-6020, Austria
| | - Laura von Raffay
- Department of Internal Medicine II, Infectious Diseases, Immunology, Rheumatology, Medical University of Innsbruck, Anichstraße 35, Innsbruck A-6020, Austria
| | - Richard Hilbe
- Department of Internal Medicine II, Infectious Diseases, Immunology, Rheumatology, Medical University of Innsbruck, Anichstraße 35, Innsbruck A-6020, Austria
| | - Verena Petzer
- Department of Internal Medicine II, Infectious Diseases, Immunology, Rheumatology, Medical University of Innsbruck, Anichstraße 35, Innsbruck A-6020, Austria
| | - Patrizia L Moser
- Institute of Pathology, INNPATH, Anichstraße 35, Innsbruck A-6020, Austria
| | - Manfred Nairz
- Department of Internal Medicine II, Infectious Diseases, Immunology, Rheumatology, Medical University of Innsbruck, Anichstraße 35, Innsbruck A-6020, Austria
| | - Günter Weiss
- Department of Internal Medicine II, Infectious Diseases, Immunology, Rheumatology, Medical University of Innsbruck, Anichstraße 35, Innsbruck A-6020, Austria; Christian Doppler Laboratory for Iron Metabolism and Anemia Research, Medical University of Innsbruck, Innsbruck A-6020, Austria.
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Bergmann CB, Hammock BD, Wan D, Gogolla F, Goetzman H, Caldwell CC, Supp DM. TPPU treatment of burned mice dampens inflammation and generation of bioactive DHET which impairs neutrophil function. Sci Rep 2021; 11:16555. [PMID: 34400718 PMCID: PMC8368302 DOI: 10.1038/s41598-021-96014-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2021] [Accepted: 08/03/2021] [Indexed: 12/20/2022] Open
Abstract
Oxylipins modulate the behavior of immune cells in inflammation. Soluble epoxide hydrolase (sEH) converts anti-inflammatory epoxyeicosatrienoic acid (EET) to dihydroxyeicosatrienoic acid (DHET). An sEH-inhibitor, TPPU, has been demonstrated to ameliorate lipopolysaccharide (LPS)- and sepsis-induced inflammation via EETs. The immunomodulatory role of DHET is not well characterized. We hypothesized that TPPU dampens inflammation and that sEH-derived DHET alters neutrophil functionality in burn induced inflammation. Outbred mice were treated with vehicle, TPPU or 14,15-DHET and immediately subjected to either sham or dorsal scald 28% total body surface area burn injury. After 6 and 24 h, interleukin 6 (IL-6) serum levels and neutrophil activation were analyzed. For in vitro analyses, bone marrow derived neutrophil functionality and mRNA expression were examined. In vivo, 14,15-DHET and IL-6 serum concentrations were decreased after burn injury with TPPU administration. In vitro, 14,15-DHET impaired neutrophil chemotaxis, acidification, CXCR1/CXCR2 expression and reactive oxygen species (ROS) production, the latter independent from p38MAPK and PI3K signaling. We conclude that TPPU administration decreases DHET post-burn. Furthermore, DHET downregulates key neutrophil immune functions and mRNA expression. Altogether, these data reveal that TPPU not only increases anti-inflammatory and inflammation resolving EET levels, but also prevents potential impairment of neutrophils by DHET in trauma.
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Affiliation(s)
- Christian B Bergmann
- Division of Research, Department of Surgery, College of Medicine, University of Cincinnati, Cincinnati, OH, USA
| | - Bruce D Hammock
- Department of Entomology, University of California, Davis, CA, USA
| | - Debin Wan
- Department of Entomology, University of California, Davis, CA, USA
| | - Falk Gogolla
- Institute of Bioinformatics, Medical University of Innsbruck, Innsbruck, Austria
| | - Holly Goetzman
- Division of Research, Department of Surgery, College of Medicine, University of Cincinnati, Cincinnati, OH, USA
| | - Charles C Caldwell
- Division of Research, Department of Surgery, College of Medicine, University of Cincinnati, Cincinnati, OH, USA
| | - Dorothy M Supp
- Division of Plastic, Reconstructive and Hand Surgery/Burn Surgery, Department of Surgery, University of Cincinnati College of Medicine, Cincinnati, OH, USA. .,Scientific Staff, Shriners Children's Ohio, Dayton, OH, USA.
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Transcriptional Profiling Reveals Kidney Neutrophil Heterogeneity in Both Healthy People and ccRCC Patients. J Immunol Res 2021; 2021:5598627. [PMID: 33791390 PMCID: PMC7984911 DOI: 10.1155/2021/5598627] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2021] [Revised: 01/31/2021] [Accepted: 02/24/2021] [Indexed: 12/13/2022] Open
Abstract
Neutrophil is known to critically impact the development of renal diseases (e.g., the clear cell renal cell carcinoma (ccRCC)), whereas the heterogeneity of neutrophils in ccRCC remains unclear. In the present study, kidney biopsies from healthy donors and ccRCC tissues were collected for single-cell RNA sequencing (scRNA-seq). In addition, the subpopulations of neutrophils in a healthy kidney and in the tumor microenvironment (TME) of ccRCC were expressed and then analyzed. The genes reported previously were mapped to all subpopulations identified here. On that basis, biological theme comparison and Gene Set Enrichment Analysis (GSEA) were employed to reveal and compare relevant biological functions. In a healthy kidney, neutrophils exhibit two subpopulations: one is more associated with renal autoimmunity, probably acting as therapeutic target; the other is suggested to resist infectious microorganisms. It is noteworthy that six subpopulations were identified in ccRCC biopsy, and two were more relevant to autoimmunity, while the other four are more relevant to the tumor pathology. Besides, ccRCC neutrophil could resist anticancer immune therapies of ipilimumab and pembrolizumab for their low/no expressions of CTLA-4, PD-1, and PD-L1. Thus, this study can help understand the heterogeneity and pathological significance of neutrophils in renal diseases.
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