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Obri MS, Fahoury AM, Alhaj Ali S, Samad M, Alluri S, Obri AS, Almajed MR, Harris KB, Jafri SM. Pulmonary Complications of Everolimus in Liver Transplant Patients: A 10-Year Experience. Cureus 2024; 16:e53334. [PMID: 38435956 PMCID: PMC10907112 DOI: 10.7759/cureus.53334] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/31/2024] [Indexed: 03/05/2024] Open
Abstract
This retrospective study aims to evaluate the safety of everolimus when used as part of the immunosuppression regimen in patients who underwent liver transplant from 2009 to 2019 at a tertiary liver transplant center. Patients were divided into two groups: those who received everolimus as part of the post-transplant regimen and those who did not. The primary safety outcome measured was the development of new pulmonary complications that had been associated with everolimus use in prior studies. Lung function was determined by pulmonary function tests if available or CT scans of the chest. Secondary outcomes measured included everolimus discontinuation rates and survival rates. During the study period, 450 patients underwent liver transplant; 35% of patients received everolimus (n=156) and 65% of patients did not receive everolimus (n=292). Primary safety outcome of pulmonary complications was seen in 3.9% of patients who received everolimus (n=6) and 6.3% of the control group patients who did not receive everolimus (n=19). The association between everolimus use and new pulmonary complications was not significant with a chi-square statistic of 1.33 (p=0.249). Overall, 51.3% of patients who received everolimus during their post-transplant course discontinued the medication (n=80). Everolimus is safe from a pulmonary toxicity standpoint in liver transplant immunosuppression regimens as there was no significant difference found in pulmonary complications between patients who received the medication and those who did not.
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Affiliation(s)
- Mark S Obri
- Internal Medicine, Henry Ford Health System, Detroit, USA
| | - Alan M Fahoury
- Internal Medicine, University of Toledo College of Medicine and Life Sciences, Toledo, USA
| | | | - Momin Samad
- Internal Medicine, Henry Ford Health System, Detroit, USA
| | | | - Alex S Obri
- Pharmacy, College of Pharmacy, University of Toledo, Toledo, USA
| | | | - Kevin B Harris
- Gastroenterology, Henry Ford Health System, Detroit, USA
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2
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Chen X, Chen J, Liu S, Li X. Everolimus-induced hyperpermeability of endothelial cells causes lung injury. Exp Biol Med (Maywood) 2023; 248:2440-2448. [PMID: 38158699 PMCID: PMC10903245 DOI: 10.1177/15353702231220672] [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: 06/20/2023] [Accepted: 10/06/2023] [Indexed: 01/03/2024] Open
Abstract
The mammalian target of rapamycin (mTOR) inhibitors, everolimus (but not dactolisib), is frequently associated with lung injury in clinical therapies. However, the underlying mechanisms remain unclear. Endothelial cell barrier dysfunction plays a major role in the pathogenesis of the lung injury. This study hypothesizes that everolimus increases pulmonary endothelial permeability, which leads to lung injury. We tested the effects of everolimus on human pulmonary microvascular endothelial cell (HPMEC) permeability and a mouse model of intraperitoneal injection of everolimus was established to investigate the effect of everolimus on pulmonary vascular permeability. Our data showed that everolimus increased human pulmonary microvascular endothelial cell (HPMEC) permeability which was associated with MLC phosphorylation and F-actin stress fiber formation. Furthermore, everolimus induced an increasing concentration of intracellular calcium Ca2+ leakage in HPMECs and this was normalized with ryanodine pretreatment. In addition, ryanodine decreased everolimus-induced phosphorylation of PKCα and MLC, and barrier disruption in HPMECs. Consistent with in vitro data, everolimus treatment caused a visible lung-vascular barrier dysfunction, including an increase in protein in BALF and lung capillary-endothelial permeability, which was significantly attenuated by pretreatment with an inhibitor of PKCα, MLCK, and ryanodine. This study shows that everolimus induced pulmonary endothelial hyper-permeability, at least partly, in an MLC phosphorylation-mediated EC contraction which is influenced in a Ca2+-dependent manner and can lead to lung injury through mTOR-independent mechanisms.
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Affiliation(s)
- Xiaolin Chen
- Department of Clinical Laboratory, Pingxiang People's Hospital, Pingxiang 337000, China
- Department of Clinical Laboratory, The Sixth Clinical College of Gannan Medical University, Pingxiang 337000, China
| | - Jianhui Chen
- Department of Clinical Laboratory, Pingxiang People's Hospital, Pingxiang 337000, China
| | - Shuihong Liu
- Department of Clinical Laboratory, Pingxiang People's Hospital, Pingxiang 337000, China
| | - Xianfan Li
- Department of Clinical Laboratory, Pingxiang People's Hospital, Pingxiang 337000, China
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Chen X, Chen J, Liu S, Li X. PECAM-1 mediates temsirolimus-induced increase in neutrophil transendothelial migration that leads to lung injury. Biochem Biophys Res Commun 2023; 682:180-186. [PMID: 37820453 DOI: 10.1016/j.bbrc.2023.10.019] [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: 10/04/2023] [Accepted: 10/05/2023] [Indexed: 10/13/2023]
Abstract
Temsirolimus is a first-generation mTOR inhibitor commonly used in the clinical treatment of cancers that is associated with lung injury. However, the mechanism underlying this adverse effect remains elusive. Endothelial barrier dysfunction plays a pivotal role in the infiltration of neutrophils into the pulmonary alveoli, which eventually induces lung injury. The present study demonstrates that temsirolimus induces the aberrant expression of adhesion molecules in endothelial cells, leading to enhanced neutrophil infiltration and subsequent lung injury. Results of a mouse model revealed that temsirolimus disrupted capillary-alveolar barrier function and facilitated neutrophil transmigration across the endothelium within the alveolar space. Consistent with our in vivo observations, temsirolimus impaired intercellular barrier function within monolayers of human lung endothelial cells, resulting in increased neutrophil infiltration. Furthermore, we demonstrated that temsirolimus-induced neutrophil transendothelial migration was mediated by platelet endothelial cell adhesion molecule-1 (PECAM-1) in both in vitro and in vivo experiments. Collectively, these findings highlight that temsirolimus induces endothelial barrier dysfunction via PECAM-1-dependent pathway both in vitro and in vivo, ultimately leading to neutrophil infiltration and subsequent pulmonary injury.
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Affiliation(s)
- Xiaolin Chen
- Department of Clinical Laboratory, Pingxiang People's Hospital, Pingxiang, Jiangxi, China; Department of Clinical Laboratory, Pingxiang Hospital Affiliated to Gannan Medical University, Pingxiang, Jiangxi, China
| | - Jianhui Chen
- Department of Clinical Laboratory, Pingxiang People's Hospital, Pingxiang, Jiangxi, China
| | - Shuihong Liu
- Department of Clinical Laboratory, Pingxiang People's Hospital, Pingxiang, Jiangxi, China
| | - Xianfan Li
- Department of Clinical Laboratory, Pingxiang People's Hospital, Pingxiang, Jiangxi, China
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4
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Tatsushima D, Kurioka T, Mizutari K, Suzuki J, Ikeda R, Hisaoka T, Koshiba Y, Takahashi H, Hashimoto H, Katori Y, Shiotani A. Effects of Unilateral Vagotomy on LPS-Induced Aspiration Pneumonia in Mice. Dysphagia 2023; 38:1353-1362. [PMID: 36788140 DOI: 10.1007/s00455-023-10564-3] [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: 09/21/2022] [Accepted: 02/02/2023] [Indexed: 02/16/2023]
Abstract
Respiratory-related dysphagia and aspiration pneumonia can be attributed to multiple causes. However, reproduction of multiple factor-related respiratory distress and aspiration pneumonia in a single animal model is challenging. To validate animals with vagal nerve palsy as novel models for severe aspiration pneumonia associated with respiratory distress, we investigated the effects of unilateral vagotomy on the swallowing function and severity of pneumonia after forced aspiration in mice. Unilateral vagotomy was performed in C57BL6 male mice that subsequently underwent evaluation of swallowing function by videofluoroscopic swallow study (VFSS) and histological assessments for aspiration pneumonia induced by lipopolysaccharide (LPS). VFSS examinations demonstrated that unilateral vagotomy did not cause apparent aspiration in mice, but it resulted in a significant loss of body weight (BW) due to decreased oral intake. In addition, when aspiration pneumonia was induced by forced administration of LPS, significantly prolonged BW loss and severe infiltration of inflammatory cells associated with aspiration pneumonia were observed in the mice that underwent unilateral vagotomy. In conclusion, the vagotomized mice showed appropriate characteristics as a model of aspiration pneumonia caused by multiple factors, including the paralysis of vocal fold movement and respiratory distress. This model can help elucidate the pathogenesis of aspiration pneumonia and the treatment methods for the respiration-compromised model.
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Affiliation(s)
- Daisuke Tatsushima
- Department of Otolaryngology-Head and Neck Surgery, National Defense Medical College, 3-2 Namiki, Tokorozawa, Saitama, 359-8513, Japan
| | - Takaomi Kurioka
- Department of Otolaryngology-Head and Neck Surgery, National Defense Medical College, 3-2 Namiki, Tokorozawa, Saitama, 359-8513, Japan
| | - Kunio Mizutari
- Department of Otolaryngology-Head and Neck Surgery, National Defense Medical College, 3-2 Namiki, Tokorozawa, Saitama, 359-8513, Japan.
| | - Jun Suzuki
- Department of Otolaryngology-Head and Neck Surgery, Tohoku University Graduate School of Medicine, Miyagi, Japan
| | - Ryoukichi Ikeda
- Department of Otolaryngology-Head and Neck Surgery, Tohoku University Graduate School of Medicine, Miyagi, Japan
| | - Takuma Hisaoka
- Department of Otolaryngology-Head and Neck Surgery, Tohoku University Graduate School of Medicine, Miyagi, Japan
| | - Yasutoshi Koshiba
- Department of Otolaryngology-Head and Neck Surgery, Tohoku University Graduate School of Medicine, Miyagi, Japan
| | - Hiyori Takahashi
- Department of Otolaryngology-Head and Neck Surgery, Tohoku University Graduate School of Medicine, Miyagi, Japan
| | - Hikaru Hashimoto
- Department of Otolaryngology-Head and Neck Surgery, Tohoku University Graduate School of Medicine, Miyagi, Japan
| | - Yukio Katori
- Department of Otolaryngology-Head and Neck Surgery, Tohoku University Graduate School of Medicine, Miyagi, Japan
| | - Akihiro Shiotani
- Department of Otolaryngology-Head and Neck Surgery, National Defense Medical College, 3-2 Namiki, Tokorozawa, Saitama, 359-8513, Japan
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5
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Chu R, Wang N, Bi Y, Nan G. Rapamycin prevents lung injury related to acute spinal cord injury in rats. Sci Rep 2023; 13:10674. [PMID: 37393367 PMCID: PMC10314925 DOI: 10.1038/s41598-023-37884-6] [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: 04/18/2023] [Accepted: 06/29/2023] [Indexed: 07/03/2023] Open
Abstract
Severe injury occurs in the lung after acute spinal cord injury (ASCI) and autophagy is inhibited. However, rapamycin-activated autophagy's role and mechanism in lung injury development after ASCI is unknown. Preventing lung injury after ASCI by regulating autophagy is currently a valuable and unknown area. Herein, we aimed to investigate the effect and possible mechanism of rapamycin-activated autophagy on lung damage post-ASCI. An experimental animal study of rapamycin's effect and mechanism on lung damage after ASCI. We randomly divided 144 female wild-type Sprague-Dawley rats into a vehicle sham group (n = 36), a vehicle injury group (n = 36), a rapamycin sham group (n = 36), and a rapamycin injury group (n = 36). The spine was injured at the tenth thoracic vertebra using Allen's method. At 12, 24, 48, and 72 h after surgery, the rats were killed humanely. Lung damage was evaluated via pulmonary gross anatomy, lung pathology, and apoptosis assessment. Autophagy induction was assessed according to LC3, RAB7, and Beclin 1 levels. ULK-1, ULK-1 Ser555, ULK-1 Ser757, AMPK α and AMPK β1/2 were used to investigate the potential mechanism. After rapamycin pretreatment, the lung showed no obvious damage (e.g., cell death, inflammatory exudation, hemorrhage, and pulmonary congestion) at 12 h and 48 h after injury and Beclin1, LC3 and RAB7 levels increased. After rapamycin pretreatment, ULK-1, ULK-1 Ser555, and ULK-1 Ser757 levels increased at 12 h and 48 h after injury compared with the vehicle group, but they decreased at 12 h after injury compared with the rapamycin sham group. After rapamycin pretreatment, AMPKα levels did not change significantly before and after injury; however, at 48 h after injury, its level was elevated significantly compared with that in the vehicle group. Rapamycin can prevent lung injury after ASCI, possibly via upregulation of autophagy through the AMPK-mTORC1-ULK1 regulatory axis.
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Affiliation(s)
- Ruiliang Chu
- Department of Orthopedics Children's Hospital of Chongqing Medical University, National Clinical Research Center for Child Health and Disorders, Ministry of Education Key Laboratory of Child Development and Disorders, China International Science and Technology Cooperation Base of Child Development and Critical Disorders, Chongqing Engineering Research Center of Stem Cell Therapy, Chongqing, China
| | - Nan Wang
- Department of Orthopedics Children's Hospital of Chongqing Medical University, National Clinical Research Center for Child Health and Disorders, Ministry of Education Key Laboratory of Child Development and Disorders, China International Science and Technology Cooperation Base of Child Development and Critical Disorders, Chongqing Engineering Research Center of Stem Cell Therapy, Chongqing, China
| | - Yang Bi
- Department of Orthopedics Children's Hospital of Chongqing Medical University, National Clinical Research Center for Child Health and Disorders, Ministry of Education Key Laboratory of Child Development and Disorders, China International Science and Technology Cooperation Base of Child Development and Critical Disorders, Chongqing Engineering Research Center of Stem Cell Therapy, Chongqing, China
| | - Guoxin Nan
- Department of Orthopedics Children's Hospital of Chongqing Medical University, National Clinical Research Center for Child Health and Disorders, Ministry of Education Key Laboratory of Child Development and Disorders, China International Science and Technology Cooperation Base of Child Development and Critical Disorders, Chongqing Engineering Research Center of Stem Cell Therapy, Chongqing, China.
- Dongguan Children's Hospital Affiliated to Guangdong Medical University, Dongguan Eighth People's Hospital, Dongguan Institute of Pediatrics, Dongguan, China.
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6
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Xie Y, Lei X, Zhao G, Guo R, Cui N. mTOR in programmed cell death and its therapeutic implications. Cytokine Growth Factor Rev 2023; 71-72:66-81. [PMID: 37380596 DOI: 10.1016/j.cytogfr.2023.06.002] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2023] [Revised: 06/12/2023] [Accepted: 06/19/2023] [Indexed: 06/30/2023]
Abstract
Mechanistic target of rapamycin (mTOR), a highly conserved serine/threonine kinase, is involved in cellular metabolism, protein synthesis, and cell death. Programmed cell death (PCD) assists in eliminating aging, damaged, or neoplastic cells, and is indispensable for sustaining normal growth, fighting pathogenic microorganisms, and maintaining body homeostasis. mTOR has crucial functions in the intricate signaling pathway network of multiple forms of PCD. mTOR can inhibit autophagy, which is part of PCD regulation. Cell survival is affected by mTOR through autophagy to control reactive oxygen species production and the degradation of pertinent proteins. Additionally, mTOR can regulate PCD in an autophagy-independent manner by affecting the expression levels of related genes and phosphorylating proteins. Therefore, mTOR acts through both autophagy-dependent and -independent pathways to regulate PCD. It is conceivable that mTOR exerts bidirectional regulation of PCD, such as ferroptosis, according to the complexity of signaling pathway networks, but the underlying mechanisms have not been fully explained. This review summarizes the recent advances in understanding mTOR-mediated regulatory mechanisms in PCD. Rigorous investigations into PCD-related signaling pathways have provided prospective therapeutic targets that may be clinically beneficial for treating various diseases.
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Affiliation(s)
- Yawen Xie
- Department of Critical Care Medicine, Peking Union Medical College Hospital, Chinese Academy of Medical Science and Peking Union Medical College, Beijing, China
| | - Xianli Lei
- Department of Critical Care Medicine, Peking Union Medical College Hospital, Chinese Academy of Medical Science and Peking Union Medical College, Beijing, China
| | - Guoyu Zhao
- Department of Critical Care Medicine, Peking Union Medical College Hospital, Chinese Academy of Medical Science and Peking Union Medical College, Beijing, China
| | - Ran Guo
- Department of Critical Care Medicine, Peking Union Medical College Hospital, Chinese Academy of Medical Science and Peking Union Medical College, Beijing, China
| | - Na Cui
- Department of Critical Care Medicine, Peking Union Medical College Hospital, Chinese Academy of Medical Science and Peking Union Medical College, Beijing, China.
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7
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Le A, Liu W, Wu C, Hu P, Zou J, Wu Y, Kuang L. Polymorphonuclear neutrophil activation by Src phosphorylation contributes to HLA-A2 antibody-induced transfusion-related acute lung injury. Mol Immunol 2022; 150:9-19. [PMID: 35914412 DOI: 10.1016/j.molimm.2022.04.010] [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: 09/06/2021] [Revised: 02/18/2022] [Accepted: 04/21/2022] [Indexed: 11/25/2022]
Abstract
Human leukocyte antigen (HLA)-A2 antibody contributes to the pathogenesis of transfusion-related acute lung injury (TRALI) via polymorphonuclear neutrophil (PMN) activation, but the signaling pathways involved this process remain largely undefined. In this study, we sought to study the signaling pathways involved in the pathogenesis of HLA-A2-induced TRALI. Lipopolysaccharide (LPS), and the plasma from the HLA-A2 antibody-positive donors were utilized to establish a rat model of TRALI. Human pulmonary endothelial cells (HPMECs) were in vitro co-cultured with HLA-A2 antibody-treated PMNs and then treated with LPS to induce a cytotoxicity model. The effects of HLA-A2 antibody on HPMEC injury were evaluated in this model. Besides, dasatinib was used to block the Src phosphorylation to explore whether Src involved in the TRALI or HPMEC injury induced by HLA-A2 antibody. The HLA-A2 antibody plus LPS induced TRALI and stimulated PMN activation in rats. HLA-A2 antibody-induced TRALI could be attenuated via depletion of PMN. HLA-A2 antibody activated NF-κB and NLRP3 inflammasome. In addition, HLA-A2 antibody aggravated the HPMEC injuries and the release of PMN surfaces makers, but dasatinib treatment reversed this effect, indicating that HLA-A2 antibody activated PMNs and exacerbated TRALI by stimulating phosphorylation of Src followed by activation of NF-κB and NLRP3 inflammasome, which was validated in vivo. In summary, HLA-A2 induced PMNs by activating NF-κB/NLRP3 inflammasome via phosphorylated-Src elevation, thereby exacerbating TRALI. This study highlights promising target for the treatment of antibody-mediated TRALI.
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Affiliation(s)
- Aiping Le
- Departments of Blood Transfusion, The First Affiliated Hospital of Nanchang University, Nanchang 330006, PR China.
| | - Wei Liu
- Departments of Blood Transfusion, The First Affiliated Hospital of Nanchang University, Nanchang 330006, PR China
| | - Chenggao Wu
- Departments of Blood Transfusion, The First Affiliated Hospital of Nanchang University, Nanchang 330006, PR China
| | - Piaoping Hu
- Departments of Blood Transfusion, The First Affiliated Hospital of Nanchang University, Nanchang 330006, PR China
| | - Juan Zou
- Departments of Blood Transfusion, The First Affiliated Hospital of Nanchang University, Nanchang 330006, PR China
| | - Yize Wu
- Departments of Blood Transfusion, The First Affiliated Hospital of Nanchang University, Nanchang 330006, PR China
| | - Linju Kuang
- Departments of Blood Transfusion, The First Affiliated Hospital of Nanchang University, Nanchang 330006, PR China
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8
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Yang B, Ma L, Wei Y, Cui Y, Li X, Wei Y, Zhang S, Zhang L, Zhou H, Wang G, Li X. Isorhamnetin alleviates lipopolysaccharide-induced acute lung injury by inhibiting mTOR signaling pathway. Immunopharmacol Immunotoxicol 2022; 44:387-399. [PMID: 35306954 DOI: 10.1080/08923973.2022.2052892] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Aim: Acute Lung Injury (ALI) is an acute hypoxic respiratory insufficiency caused by various traumatic factors, manifested as progressive hypoxemia and respiratory distress, and lung imaging shows a heterogeneous osmotic outbreak. Isorhamnetin (ISO) is a flavonoid compound isolated and purified from medicinal plants, such as Hippophae rhamnoides L. and Ginkgo, and has multiple pharmacological functions, such as anti-tumor, anti-myocardial hypoxia, and cardiovascular protection. Our previous study has shown that ISO could attenuate lipopolysaccharide (LPS)-induced acute lung injury in mice, but its mechanism is not clear.Methods: In this study, we used LPS-induced mouse and cell models to research the mechanism of ISO alleviating acute lung injury.Results: The results showed that ISO could attenuate the injury of type II alveolar epithelial cells by inhibiting the TLR4/NF-κB pathway. Further studies showed that ISO could inhibit the activation of mTOR signal in vivo and in vitro and promote autophagy in alveolar epithelial cells to reduce lung injury caused by LPS. In addition, ISO could inhibit LPS-induced epithelial cell apoptosis.Conclusion: Overall, ISO could suppress injury and apoptosis of epithelial cells and activate autophagy to protect epithelial cells via inhibiting mTOR signal and attenuating LPS-induced acute lung injury in mice.
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Affiliation(s)
- Bo Yang
- Department of Thoracic Surgery, Tianjin First Central Hospital, Nankai University, Tianjin, China
| | - Ling Ma
- State Key Laboratory of Medicinal Chemical Biology, Tianjin Key Laboratory of Molecular Drug Research, College of Pharmacy, Nankai University, Tianjin, China
| | - Yuli Wei
- State Key Laboratory of Medicinal Chemical Biology, Tianjin Key Laboratory of Molecular Drug Research, College of Pharmacy, Nankai University, Tianjin, China
| | - Yunyao Cui
- State Key Laboratory of Medicinal Chemical Biology, Tianjin Key Laboratory of Molecular Drug Research, College of Pharmacy, Nankai University, Tianjin, China
| | - Xiaohe Li
- State Key Laboratory of Medicinal Chemical Biology, Tianjin Key Laboratory of Molecular Drug Research, College of Pharmacy, Nankai University, Tianjin, China
| | - Yiying Wei
- State Key Laboratory of Medicinal Chemical Biology, Tianjin Key Laboratory of Molecular Drug Research, College of Pharmacy, Nankai University, Tianjin, China
| | - Shanshan Zhang
- State Key Laboratory of Medicinal Chemical Biology, Tianjin Key Laboratory of Molecular Drug Research, College of Pharmacy, Nankai University, Tianjin, China
| | - Liang Zhang
- Department of Thoracic Surgery, Tianjin First Central Hospital, Nankai University, Tianjin, China
| | - Honggang Zhou
- State Key Laboratory of Medicinal Chemical Biology, Tianjin Key Laboratory of Molecular Drug Research, College of Pharmacy, Nankai University, Tianjin, China
| | - Guangshun Wang
- Department of Thoracic Surgery, Tianjin Baodi Hospital, Baodi Clinical College of Tianjin Medical University, Tianjin, China
| | - Xiaoping Li
- Department of Thoracic Surgery, Tianjin First Central Hospital, Nankai University, Tianjin, China
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John A, Raza H. Azadirachtin Attenuates Lipopolysaccharide-Induced ROS Production, DNA Damage, and Apoptosis by Regulating JNK/Akt and AMPK/mTOR-Dependent Pathways in Rin-5F Pancreatic Beta Cells. Biomedicines 2021; 9:biomedicines9121943. [PMID: 34944759 PMCID: PMC8698279 DOI: 10.3390/biomedicines9121943] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2021] [Revised: 12/07/2021] [Accepted: 12/16/2021] [Indexed: 12/20/2022] Open
Abstract
Pancreatic inflammation and the resulting cellular responses have been implicated in pancreatitis, diabetes, and pancreatic cancer. Inflammatory responses due to the bacterial endotoxin, lipopolysaccharide (LPS), have been demonstrated to alter cellular metabolism, autophagy, apoptosis, and cell proliferation in different cell populations, and hence increases the risks for organ toxicity including cancer. The exact molecular mechanism is however not clear. In the present study, we investigated the role and mechanism of an antioxidant, azadirachtin (AZD), a limonoid extracted from the neem tree (Azadirachta indica), against LPS-induced oxidative stress in the pancreatic β-cell line, Rin-5F. We demonstrated that cells treated with LPS (1 µg/mL for 24 h) showed increased reactive oxygen species (ROS) production, DNA damage, cell cycle arrest, and apoptosis. Our results also showed that LPS induced alterations in the AMP-activated protein kinase (AMPK)/mammalian target of rapamycin (mTOR) pathways, suppressing autophagy and augmenting apoptosis. Treatment with Azadirachtin (25 µM for 24 h), on the other hand, rendered some degree of protection to the pancreatic cells from apoptosis by inducing the autophagy signals required for cell survival. These results may have significance in elucidating the mechanisms of pancreatic β-cell survival and death by balancing the molecular communication between autophagy and apoptosis under inflammatory and pathological conditions.
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10
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Liu S, Gao S, Yang Z, Zhang P. miR-128-3p reduced acute lung injury induced by sepsis via targeting PEL12. Open Med (Wars) 2021; 16:1109-1120. [PMID: 34430706 PMCID: PMC8345018 DOI: 10.1515/med-2021-0258] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2020] [Revised: 02/08/2021] [Accepted: 02/25/2021] [Indexed: 01/01/2023] Open
Abstract
Objective Acute lung injury (ALI) caused by sepsis is clinically a syndrome, which is featured by damage to the alveolar epithelium and endothelium. In this study, we employed mice models of cecal ligation and puncture (CLP) and primary mice pulmonary microvascular endothelial cells (MPVECs) in vitro to investigate the effect of miR-128-3p in ALI caused by sepsis. Methods miR-128-3p agomir or randomized control were injected into adult male C57BL/6 mice 1 week before the CLP surgery. We used miR-128-3p agomir or scrambled control to transfect MPVECs and then employed lipopolysaccharide (LPS) stimulation on the cells. Pellino homolog 2 (PELI2) was predicted to be a direct target of miR-128-3p via luciferase reporter assay. MPVECs were cotransfected with lentiviral vector that expressed PELI2 (or empty vector) as well as miR-128-3p-mimics 1 day before LPS stimulation in rescue experiment. Transcriptional activity of caspase-3, cell apoptosis rate, and the expression levels of miR-128-3p, interleukin-1β (IL-1β), interleukin-6 (IL-6), and PELI2 were analyzed. Results Compared with the sham group, the lung of mice in the CLP group showed pulmonary morphological abnormalities, and the expression of IL-6 and IL-1β, caspase-3 activity, and apoptosis rate were significantly upregulated in the CLP group. Inflammatory factor levels and apoptosis rate were also significantly induced by LPS stimulation on MPVECs. Upregulation of miR-128-3p effectively inhibited sepsis-induced ALI, apoptosis as well as inflammation. miR-128-3p also played a role in antiapoptosis and anti-inflammation in MPVECs with LPS treatment. PEL12 upregulation in MPVECs alleviated miR-128-3p-induced caspase-3 activity inhibition and pro-inflammatory factor production. Conclusions miR-128-3p enabled to alleviate sepsis-induced ALI by inhibiting PEL12 expression, indicating a novel treatment strategy of miR-128-3p for sepsis-induced ALI.
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Affiliation(s)
- Shinan Liu
- Department of Thoracic Surgery, China Tianjin Medical University General Hospital, Tianjin, China
| | - Shuai Gao
- Department of Thoracic Surgery, China Tianjin Medical University General Hospital, Tianjin, China
| | - Zhaoyu Yang
- Department of Thoracic Surgery, China Tianjin Medical University General Hospital, Tianjin, China
| | - Peng Zhang
- Department of Thoracic Surgery, China Tianjin Medical University General Hospital, Tianjin, China
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11
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Chen X, Hu C, Fan X, Wang Y, Li Q, Su YQ, Zhang DM, Yang Q, Passerini AG, Sun C. mTOR Inhibition Promotes Pneumonitis Through Inducing Endothelial Contraction and Hyperpermeability. Am J Respir Cell Mol Biol 2021; 65:646-657. [PMID: 34251297 DOI: 10.1165/rcmb.2020-0390oc] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Compromised endothelial (EC) barrier function is a hallmark of inflammatory diseases. Mammalian target of rapamycin (mTOR) inhibitors, widely applied as clinical therapies, cause pneumonitis through mechanisms not yet fully understood. This study aimed to elucidate the EC mechanisms underlying the pathogenesis of pneumonitis caused by mTOR inhibition (mTORi). Mice with EC-specific deletion of mTOR complex components (Mtor, Rptor or Rictor) were administered LPS to induce pulmonary injury. Cultured EC were treated with pharmacological inhibitors, small interfering RNA or overexpression-plasmids. EC barrier function was evaluated in vivo with Evan's blue assay and in vitro by measurement of transendothelial electrical resistance and albumin flux. mTORi increased basal and TNFα-induced EC permeability, which was caused by myosin light chain (MLC) phosphorylation-dependent cell contraction. Inactivation of mTOR kinase activity by mTORi triggered PKCδ/p38/NF-κB signaling that significantly upregulated TNFα-induced MLC kinase (MLCK) expression, while Raptor promoted the phosphorylation of PKCα/MYPT1 independent of its interaction with mTOR, leading to suppression of MLC phosphatase (MLCP) activity. EC-specific deficiency in mTOR, Raptor or Rictor aggravated lung inflammation in LPS-treated mice. These findings reveal that mTORi induces PKC-dependent endothelial MLC phosphorylation, contraction and hyperpermeability that promote pneumonitis.
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Affiliation(s)
- Xiaolin Chen
- Nanjing Medical University Collaborative Innovation Center for Cardiovascular Disease Translational Medicine, 540955, Key Laboratory of Targeted Intervention of Cardiovascular Disease, Nanjing, China.,2Key laboratory of Human Functional Genomics of Jiangsu Province, Nanjing, China
| | - Chengxiu Hu
- Nanjing Medical University Collaborative Innovation Center for Cardiovascular Disease Translational Medicine, 540955, Key Laboratory of Targeted Intervention of Cardiovascular Disease, Nanjing, China.,Key laboratory of Human Functional Genomics of Jiangsu Province, Nanjing, China
| | - Xing Fan
- Nanjing Medical University Collaborative Innovation Center for Cardiovascular Disease Translational Medicine, 540955, Key Laboratory of Targeted Intervention of Cardiovascular Disease, Nanjing, China.,Key laboratory of Human Functional Genomics of Jiangsu Province, Nanjing, China
| | - Yiying Wang
- Nanjing Medical University Collaborative Innovation Center for Cardiovascular Disease Translational Medicine, 540955, Key Laboratory of Targeted Intervention of Cardiovascular Disease, Nanjing, China.,Key laboratory of Human Functional Genomics of Jiangsu Province, Nanjing, China
| | - Qiannan Li
- Nanjing Medical University Collaborative Innovation Center for Cardiovascular Disease Translational Medicine, 540955, Key Laboratory of Targeted Intervention of Cardiovascular Disease, Nanjing, China.,Key laboratory of Human Functional Genomics of Jiangsu Province, Nanjing, China
| | - You-Qiang Su
- Nanjing Medical University, 12461, State Key Laboratory of Reproductive Medicine, Nanjing, China
| | - Dai-Min Zhang
- Nanjing First Hospital, Nanjing Medical University, Department of Cardiology, Nanjing, China
| | - QianLu Yang
- Nanjing Medical University Collaborative Innovation Center for Cardiovascular Disease Translational Medicine, 540955, Key Laboratory of Targeted Intervention of Cardiovascular Disease, Nanjing, China.,Key laboratory of Human Functional Genomics of Jiangsu Province, Nanjing, China
| | - Anthony G Passerini
- University of California Davis, 8789, Department of Biomedical Engineering, Davis, California, United States
| | - ChongXiu Sun
- Nanjing Medical University, 12461, Nanjing, China;
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12
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Selvarani R, Mohammed S, Richardson A. Effect of rapamycin on aging and age-related diseases-past and future. GeroScience 2021; 43:1135-1158. [PMID: 33037985 PMCID: PMC8190242 DOI: 10.1007/s11357-020-00274-1] [Citation(s) in RCA: 99] [Impact Index Per Article: 33.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2020] [Accepted: 09/21/2020] [Indexed: 12/19/2022] Open
Abstract
In 2009, rapamycin was reported to increase the lifespan of mice when implemented later in life. This observation resulted in a sea-change in how researchers viewed aging. This was the first evidence that a pharmacological agent could have an impact on aging when administered later in life, i.e., an intervention that did not have to be implemented early in life before the negative impact of aging. Over the past decade, there has been an explosion in the number of reports studying the effect of rapamycin on various diseases, physiological functions, and biochemical processes in mice. In this review, we focus on those areas in which there is strong evidence for rapamycin's effect on aging and age-related diseases in mice, e.g., lifespan, cardiac disease/function, central nervous system, immune system, and cell senescence. We conclude that it is time that pre-clinical studies be focused on taking rapamycin to the clinic, e.g., as a potential treatment for Alzheimer's disease.
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Affiliation(s)
- Ramasamy Selvarani
- Department of Biochemistry & Molecular Biology, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
| | - Sabira Mohammed
- Department of Biochemistry & Molecular Biology, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
| | - Arlan Richardson
- Department of Biochemistry & Molecular Biology, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA.
- Oklahoma City VA Medical Center, Oklahoma City, OK, USA.
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13
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Wu Q, Fan X, Hong H, Gu Y, Liu Z, Fang S, Wang Q, Cai C, Fang J. Comprehensive assessment of side effects in COVID-19 drug pipeline from a network perspective. Food Chem Toxicol 2020; 145:111767. [PMID: 32971210 PMCID: PMC7505223 DOI: 10.1016/j.fct.2020.111767] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2020] [Revised: 09/09/2020] [Accepted: 09/17/2020] [Indexed: 12/21/2022]
Abstract
Currently, coronavirus disease 2019 (COVID-19), has posed an imminent threat to global public health. Although some current therapeutic agents have showed potential prevention or treatment, a growing number of associated adverse events have occurred on patients with COVID-19 in the course of medical treatment. Therefore, a comprehensive assessment of the safety profile of therapeutic agents against COVID-19 is urgently needed. In this study, we proposed a network-based framework to identify the potential side effects of current COVID-19 drugs in clinical trials. We established the associations between 116 COVID-19 drugs and 30 kinds of human tissues based on network proximity and gene-set enrichment analysis (GSEA) approaches. Additionally, we focused on four types of drug-induced toxicities targeting four tissues, including hepatotoxicity, renal toxicity, lung toxicity, and neurotoxicity, and validated our network-based predictions by preclinical and clinical evidence available. Finally, we further performed pharmacovigilance analysis to validate several drug-tissue toxicities via data mining adverse event reporting data, and we identified several new drug-induced side effects without labeling in Food and Drug Administration (FDA) drug instructions. Overall, this study provides forceful approaches to assess potential side effects on COVID-19 drugs, which will be helpful for their safe use in clinical practice and promoting the discovery of antiviral therapeutics against SARS-CoV-2.
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Affiliation(s)
- Qihui Wu
- Clinical Research Center, Hainan Provincial Hospital of Traditional Chinese Medicine, Guangzhou University of Chinese Medicine, Haikou, China; Science and Technology Innovation Center, Guangzhou University of Chinese Medicine, Guangzhou, China.
| | - Xiude Fan
- Lerner Research Institute, Cleveland Clinic, Cleveland, USA.
| | - Honghai Hong
- Department of Clinical Laboratory, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, China.
| | - Yong Gu
- Clinical Research Center, Hainan Provincial Hospital of Traditional Chinese Medicine, Guangzhou University of Chinese Medicine, Haikou, China.
| | - Zhihong Liu
- Guangdong Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, China.
| | - Shuhuan Fang
- Science and Technology Innovation Center, Guangzhou University of Chinese Medicine, Guangzhou, China.
| | - Qi Wang
- Science and Technology Innovation Center, Guangzhou University of Chinese Medicine, Guangzhou, China.
| | - Chuipu Cai
- Science and Technology Innovation Center, Guangzhou University of Chinese Medicine, Guangzhou, China.
| | - Jiansong Fang
- Science and Technology Innovation Center, Guangzhou University of Chinese Medicine, Guangzhou, China; Lerner Research Institute, Cleveland Clinic, Cleveland, USA.
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14
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Kim TJ, Park SH, Jeong HB, Ha EJ, Cho WS, Kang HS, Kim JE, Ko SB. Optimizing Nitrogen Balance Is Associated with Better Outcomes in Neurocritically Ill Patients. Nutrients 2020; 12:nu12103137. [PMID: 33066539 PMCID: PMC7602201 DOI: 10.3390/nu12103137] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2020] [Revised: 10/07/2020] [Accepted: 10/11/2020] [Indexed: 12/12/2022] Open
Abstract
Marked protein catabolism is common in critically ill patients. We hypothesized that optimal protein supplementation using nitrogen balance might be associated with better outcomes in the neurointensive care unit (NICU) patients. A total of 175 patients admitted to the NICU between July 2017 and December 2018 were included. Nitrogen balance was measured after NICU admission and measurements were repeated in 77 patients. The outcomes were compared according to initial nitrogen balance results and improvement of nitrogen balance on follow-up measurements. A total of 140 (80.0%) patients had a negative nitrogen balance on initial assessments. The negative balance group had more events of in-hospital mortality and poor functional outcome at three months. In follow-up measurement patients, 39 (50.6%) showed an improvement in nitrogen balance. The improvement group had fewer events of in-hospital mortality (p = 0.047) and poor functional outcomes (p = 0.046). Moreover, improvement of nitrogen balance was associated with a lower risk of poor functional outcomes (Odds ratio, 0.247; 95% confidence interval, 0.066–0.925, p = 0.038). This study demonstrated that a significant proportion of patients in the NICU were under protein hypercatabolism. Moreover, an improvement in protein balance was related to improved outcomes in neurocritically ill patients. Further studies are needed to confirm the relationship between protein balance and outcomes.
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Affiliation(s)
- Tae Jung Kim
- Department of Neurology, Seoul National University Hospital, Seoul 03080, Korea; (T.J.K.); (H.-B.J.)
- Department of Critical Care Medicine, Seoul National University Hospital, Seoul 03080, Korea;
| | - Soo-Hyun Park
- Department of Neurology, Inha University Hospital, Incheon 22332, Korea;
| | - Hae-Bong Jeong
- Department of Neurology, Seoul National University Hospital, Seoul 03080, Korea; (T.J.K.); (H.-B.J.)
| | - Eun Jin Ha
- Department of Critical Care Medicine, Seoul National University Hospital, Seoul 03080, Korea;
- Department of Neurosurgery, Seoul National University Hospital, Seoul 03080, Korea; (W.S.C.); (H.-S.K.); (J.E.K.)
| | - Won Sang Cho
- Department of Neurosurgery, Seoul National University Hospital, Seoul 03080, Korea; (W.S.C.); (H.-S.K.); (J.E.K.)
| | - Hyun-Seung Kang
- Department of Neurosurgery, Seoul National University Hospital, Seoul 03080, Korea; (W.S.C.); (H.-S.K.); (J.E.K.)
| | - Jeong Eun Kim
- Department of Neurosurgery, Seoul National University Hospital, Seoul 03080, Korea; (W.S.C.); (H.-S.K.); (J.E.K.)
| | - Sang-Bae Ko
- Department of Neurology, Seoul National University Hospital, Seoul 03080, Korea; (T.J.K.); (H.-B.J.)
- Department of Critical Care Medicine, Seoul National University Hospital, Seoul 03080, Korea;
- Correspondence: ; Tel.: +82-2-2072-2278
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15
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Britto FA, Dumas K, Giorgetti-Peraldi S, Ollendorff V, Favier FB. Is REDD1 a metabolic double agent? Lessons from physiology and pathology. Am J Physiol Cell Physiol 2020; 319:C807-C824. [PMID: 32877205 DOI: 10.1152/ajpcell.00340.2020] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The Akt/mechanistic target of rapamycin (mTOR) signaling pathway governs macromolecule synthesis, cell growth, and metabolism in response to nutrients and growth factors. Regulated in development and DNA damage response (REDD)1 is a conserved and ubiquitous protein, which is transiently induced in response to multiple stimuli. Acting like an endogenous inhibitor of the Akt/mTOR signaling pathway, REDD1 protein has been shown to regulate cell growth, mitochondrial function, oxidative stress, and apoptosis. Recent studies also indicate that timely REDD1 expression limits Akt/mTOR-dependent synthesis processes to spare energy during metabolic stresses, avoiding energy collapse and detrimental consequences. In contrast to this beneficial role for metabolic adaptation, REDD1 chronic expression appears involved in the pathogenesis of several diseases. Indeed, REDD1 expression is found as an early biomarker in many pathologies including inflammatory diseases, cancer, neurodegenerative disorders, depression, diabetes, and obesity. Moreover, prolonged REDD1 expression is associated with cell apoptosis, excessive reactive oxygen species (ROS) production, and inflammation activation leading to tissue damage. In this review, we decipher several mechanisms that make REDD1 a likely metabolic double agent depending on its duration of expression in different physiological and pathological contexts. We also discuss the role played by REDD1 in the cross talk between the Akt/mTOR signaling pathway and the energetic metabolism.
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Affiliation(s)
| | - Karine Dumas
- Université Cote d'Azur, INSERM, UMR1065, C3M, Nice, France
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16
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Kang K, Kim HH, Choi Y. Tiotropium is Predicted to be a Promising Drug for COVID-19 Through Transcriptome-Based Comprehensive Molecular Pathway Analysis. Viruses 2020; 12:E776. [PMID: 32698440 PMCID: PMC7412475 DOI: 10.3390/v12070776] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2020] [Revised: 07/10/2020] [Accepted: 07/17/2020] [Indexed: 12/12/2022] Open
Abstract
The coronavirus disease 2019 (COVID-19) outbreak caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) affects almost everyone in the world in many ways. We previously predicted antivirals (atazanavir, remdesivir and lopinavir/ritonavir) and non-antiviral drugs (tiotropium and rapamycin) that may inhibit the replication complex of SARS-CoV-2 using our molecular transformer-drug target interaction (MT-DTI) deep-learning-based drug-target affinity prediction model. In this study, we dissected molecular pathways upregulated in SARS-CoV-2-infected normal human bronchial epithelial (NHBE) cells by analyzing an RNA-seq data set with various bioinformatics approaches, such as gene ontology, protein-protein interaction-based network and gene set enrichment analyses. The results indicated that the SARS-CoV-2 infection strongly activates TNF and NFκB-signaling pathways through significant upregulation of the TNF, IL1B, IL6, IL8, NFKB1, NFKB2 and RELB genes. In addition to these pathways, lung fibrosis, keratinization/cornification, rheumatoid arthritis, and negative regulation of interferon-gamma production pathways were also significantly upregulated. We observed that these pathologic features of SARS-CoV-2 are similar to those observed in patients with chronic obstructive pulmonary disease (COPD). Intriguingly, tiotropium, as predicted by MT-DTI, is currently used as a therapeutic intervention in COPD patients. Treatment with tiotropium has been shown to improve pulmonary function by alleviating airway inflammation. Accordingly, a literature search summarized that tiotropium reduced expressions of IL1B, IL6, IL8, RELA, NFKB1 and TNF in vitro or in vivo, and many of them have been known to be deregulated in COPD patients. These results suggest that COVID-19 is similar to an acute mode of COPD caused by the SARS-CoV-2 infection, and therefore tiotropium may be effective for COVID-19 patients.
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Affiliation(s)
- Keunsoo Kang
- Department of Microbiology, College of Science & Technology, Dankook University, Cheonan 31116, Korea;
| | - Hoo Hyun Kim
- Department of Microbiology, College of Science & Technology, Dankook University, Cheonan 31116, Korea;
| | - Yoonjung Choi
- Deargen Inc., Daejeon, Yuseong-gu, Munji-dong 103-6, Korea
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17
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The Impact of Everolimus and Radiation Therapy on Pulmonary Fibrosis. ACTA ACUST UNITED AC 2020; 56:medicina56070348. [PMID: 32668776 PMCID: PMC7404687 DOI: 10.3390/medicina56070348] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2020] [Revised: 07/09/2020] [Accepted: 07/10/2020] [Indexed: 12/15/2022]
Abstract
Background and objectives: Everolimus (EVE) is a mammalian target of the rapamycin (mTOR) inhibitor that is widely used in cancer patients. Pulmonary toxicity, usually manifesting as interstitial pneumonitis, is a serious adverse effect of this drug. Radiation therapy, which is often administered in conjunction with chemotherapy for synergistic effects, also causes pulmonary fibrosis. In view of pulmonary damage development in these two forms of cancer treatment, we have examined the effect of EVE administration individually, in combination with radiation given in varying sequences, and its relation to the extent of pulmonary damage. Materials and Methods: We performed an experimental study in albino rats, which were randomized into five groups: (1) control group, (2) EVE alone, (3) EVE 22 h after radiation, (4) EVE 2 h after irradiation, and (5) only radiation. Sixteen weeks after thoracic irradiation, rat lung tissue samples were examined under light microscopy, and the extent of pulmonary damage was estimated. After this, we calculated median fibrosis scores in each group. Results: The highest fibrosis score was noted in Group 4. Among the five groups, the control group had a significantly lower median fibrosis score compared to the others. When the median fibrosis score of the group that received concurrent EVE with radiation therapy (RT) (Group 4) was compared with that of the control group, the difference was statistically significant (p = 0.0022). However, no significant differences were achieved among the study groups that received EVE only or RT only, whether concurrently or sequentially (p > 0.05). Conclusion: EVE is an effective treatment option for the management of several malignancies and is often combined with other therapies, such as radiation, for a more efficient response. However, an increased risk of pulmonary fibrosis should also be anticipated when these two modalities are combined, as they both can cause pulmonary damage, especially when administered concurrently.
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18
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Pleural Fluid Cytokine Levels at Baseline and Over Time are Associated With Time to IPC Removal: An Exploratory Study. J Bronchology Interv Pulmonol 2020; 27:4-13. [PMID: 31373905 DOI: 10.1097/lbr.0000000000000602] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
BACKGROUND The behavior of pleural fluid cytokine (PFCs) levels and their association with pleurodesis after indwelling pleural catheter (IPC) placement is unknown. OBJECTIVE A prospective exploratory study was conducted to obtain preliminary data on PFC levels after IPC placement. METHODS The PFC panel consisted of 4 cytokines [interleukin -8 (IL-8), vascular endothelial growth factor, total (but not activated) transforming growth factor betas, and basic fibroblast growth factor], measured across 5 time points (T0: insertion; T1: 24 to 48 h; T2: 72 to 96 h; T3: 1 wk; and T4: 2 wk). Profile plots were used to identify patterns of change of PFC levels. Correlation matrices for each PFC over time were computed, and area under the curve (AUC) categories were used to compare the cumulative incidence of IPC removal. Auto pleurodesis was defined as elective catheter removal because of decreased drainage within 90 days of insertion. RESULTS A total of 22 patients provided complete data. Except for IL-8, the majority of PFCs demonstrated strong positive correlations across measurement time points. Patients with high AUCs for IL-8, basic fibroblast growth factor, and vascular endothelial growth factor had a higher cumulative incidence of IPC removal by 90 days than did patients with low AUCs. CONCLUSION This is the first study to evaluate longitudinal changes of pleural cytokine levels with respect to the likelihood of IPC removal and provide early evidence that the cytokine profile may be associated with the outcome of pleurodesis induced by IPCs. However, this is an exploratory study and further studies are needed to assess if these findings can be validated in further studies.
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19
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Wang H, Liu S, Li J, Wang L, Wang X, Zhao J, Jiao H, Lin H. 5-Hydroxytryptophan Suppresses the Abdominal Fat Deposit and Is Beneficial to the Intestinal Immune Function in Broilers. Front Physiol 2020; 11:655. [PMID: 32595527 PMCID: PMC7304481 DOI: 10.3389/fphys.2020.00655] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2019] [Accepted: 05/22/2020] [Indexed: 11/24/2022] Open
Abstract
Background Serotonin (5-HT), a monoaminergic neurotransmitter, involves in the regulation of many physiological functions. In the present study, the effects of 5-hydroxytryptophan (5-HTP), the precursor of 5-HT, on lipid metabolism and intestinal immune function in broiler chickens were investigated in chickens. Methods Two hundred broilers were divided randomly into two groups and fed separately with a corn-soybean basal diet (CD) or the basal diet supplemented with 0.2% 5-HTP. Results The results showed that 5-HTP reduced (P < 0.05) feed intake and the abdominal fat pad weight. 5-HTP treatment tended to upregulate the mRNA level of adiponectin receptor 1 (ADP1R) and ADP2R in abdominal fat but had no significant influence on their protein levels (P > 0.05). In 5-HTP-chickens, lipopolysaccharide exposure decreased secretory immunoglobulin A (sIgA) concentrations in serum and the duodenal contents. Expression of mRNA encoding interleukin (IL), tumor necrosis factor-α (TNF-α), and transforming growth factor-β (TGF-β) decreased after 5-HTP treatment; however, LPS increased expression significantly in 5-HTP-treated chickens compared with CD chickens. In 5-HTP-chickens, the phosphorylation of mitogen-activated protein kinase (MAPK) and nuclear factor-kappa B (NF-κB) were reduced, but the phosphorylation of ribosomal p70S6 kinase (p70S6K) was increased in the duodenum. Conclusion In summary, the result suggests that dietary 5-HTP supplementation reduces accumulation of abdominal fat and is beneficial to intestinal immune function.
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Affiliation(s)
- Hui Wang
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, Shandong Agricultural University, Tai'an, China
| | - Shaoqiong Liu
- Key Laboratory of Etiology and Epidemiology of Emerging Infectious Diseases in Universities of Shandong, Shandong First Medical University and Shandong Academy of Medical Sciences, Tai'an, China
| | - Jun Li
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, Shandong Agricultural University, Tai'an, China
| | - Liyuan Wang
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, Shandong Agricultural University, Tai'an, China
| | - Xiaojuan Wang
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, Shandong Agricultural University, Tai'an, China
| | - Jingpeng Zhao
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, Shandong Agricultural University, Tai'an, China
| | - Hongchao Jiao
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, Shandong Agricultural University, Tai'an, China
| | - Hai Lin
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, Shandong Agricultural University, Tai'an, China
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20
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Xiao Y, Zhou L, Zhang T, Qin C, Wei P, Luo L, Luo L, Huang G, Chen A, Liu G. Anti-fibrosis activity of quercetin attenuates rabbit tracheal stenosis via the TGF-β/AKT/mTOR signaling pathway. Life Sci 2020; 250:117552. [PMID: 32179074 DOI: 10.1016/j.lfs.2020.117552] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2019] [Revised: 03/11/2020] [Accepted: 03/12/2020] [Indexed: 02/06/2023]
Abstract
AIMS This study aimed to explore the possible mechanism of trauma-induced laryngotracheal stenosis and potential protective and therapeutic efficacy of quercetin on trauma-induced laryngotracheal stenosis. MAIN METHODS The expression and activity of fibrotic factors [interleukin (IL)-6, IL-8, autophagy related 5 (ATG5), collagen (COL)-1, tumor growth factor (TGF)-β COL-3, microtubule-associated proteins 1A/1B light chain 3A (LC3), and vascular endothelial growth factor (VEGF)] and fibrotic signaling mediators [mammalian target of rapamycin (mTOR) and phosphorylated AKT (pAKT)] were detected by real-time quantitative PCR (qRT-PCR), ELISA, Western blot, and immunohistochemical staining, respectively, in the lipopolysaccharide (LPS)-induced WI-38 (a human embryonic lung fibroblast cell line) cellular fibrotic model and a trauma-induced rabbit tracheal stenosis model, with and without quercetin treatment. KEY FINDINGS Pre-treatment with quercetin significantly reversed the LPS-induced upregulation of pro-fibrotic factors (IL-6, IL-8, COL-1, COL-3, LC3) and fibrotic signaling mediators (mTOR and AKT), and it induced the downregulation of ATG5 in the WI-38 cells. Furthermore, the anti-fibrotic activity of quercetin was confirmed in the trauma-induced rabbit tracheal stenosis model. Thus, the nasogastric administration of quercetin attenuated the tracheal stenosis of the rabbit tracheal stenosis model, in addition to effectively reversing an increase in pro-fibrotic factors (VEGF, IL-6, TGF-β, COL-1, and COL-3) and fibrotic signaling mediators (mTOR and AKT), as well as downregulating ATG5 of the rabbit tracheal stenosis model. SIGNIFICANCE Quercetin exhibits anti-fibrotic activity by inhibiting pro-fibrotic factors and AKT/mTOR signaling pathway, in addition to activating autophagy activity. This study provided experimental evidence supporting the application of quercetin in tracheal stenosis, clinically.
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Affiliation(s)
- Yangbao Xiao
- Guangxi Medical University, Nanning, China; Endoscopy Center of Hunan Chest Hospital, Changsha, China
| | - Lei Zhou
- Endoscopy Center of Hunan Chest Hospital, Changsha, China
| | | | | | - Peng Wei
- Guangxi Medical University, Nanning, China
| | - Li Luo
- Endoscopy Center of Hunan Chest Hospital, Changsha, China
| | - Linzi Luo
- Endoscopy Center of Hunan Chest Hospital, Changsha, China
| | - Guojun Huang
- Endoscopy Center of Hunan Chest Hospital, Changsha, China
| | - Anji Chen
- Endoscopy Center of Hunan Chest Hospital, Changsha, China
| | - Guangnan Liu
- Guangxi Medical University, Nanning, China; Pulmonary and Critical Care Medicine of The Second Affiliated Hospital of Guangxi Medical University, Nanning, China.
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21
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Wu YF, Li ZY, Dong LL, Li WJ, Wu YP, Wang J, Chen HP, Liu HW, Li M, Jin CL, Huang HQ, Ying SM, Li W, Shen HH, Chen ZH. Inactivation of MTOR promotes autophagy-mediated epithelial injury in particulate matter-induced airway inflammation. Autophagy 2020; 16:435-450. [PMID: 31203721 PMCID: PMC6999647 DOI: 10.1080/15548627.2019.1628536] [Citation(s) in RCA: 70] [Impact Index Per Article: 17.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2018] [Revised: 05/21/2019] [Accepted: 05/30/2019] [Indexed: 12/21/2022] Open
Abstract
Particulate matter (PM) is able to induce airway epithelial injury, while the detailed mechanisms remain unclear. Here we demonstrated that PM exposure inactivated MTOR (mechanistic target of rapamycin kinase), enhanced macroautophagy/autophagy, and impaired lysosomal activity in HBE (human bronchial epithelial) cells and in mouse airway epithelium. Genetic or pharmaceutical inhibition of MTOR significantly enhanced, while inhibition of autophagy attenuated, PM-induced IL6 expression in HBE cells. Consistently, club-cell-specific deletion of Mtor aggravated, whereas loss of Atg5 in bronchial epithelium reduced, PM-induced airway inflammation. Interestingly, the augmented inflammatory responses caused by MTOR deficiency were markedly attenuated by blockage of downstream autophagy both in vitro and in vivo. Mechanistically, the dysregulation of MTOR-autophagy signaling was partially dependent on activation of upstream TSC2, and interacted with the TLR4-MYD88 to orchestrate the downstream NFKB activity and to regulate the production of inflammatory cytokines in airway epithelium. Moreover, inhibition of autophagy reduced the expression of EPS15 and the subsequent endocytosis of PM. Taken together, the present study provides a mechanistic explanation for how airway epithelium localized MTOR-autophagy axis regulates PM-induced airway injury, suggesting that activation of MTOR and/or suppression of autophagy in local airway might be effective therapeutic strategies for PM-related airway disorders.Abbreviations: ACTB: actin beta; AKT: AKT serine/threonine kinase; ALI: air liquid interface; AP2: adaptor related protein complex 2; ATG: autophagy related; BALF: bronchoalveolar lavage fluid; COPD: chronic obstructive pulmonary disease; CXCL: C-X-C motif chemokine ligand; DOX: doxycycline; EGF: epidermal growth factor; EGFR: epidermal growth factor receptor; EPS15: epidermal growth factor receptor pathway substrate 15; HBE: human bronchial epithelial; H&E: hematoxylin & eosin; IKK: IKB kinase; IL: interleukin; LAMP2: lysosomal-associated membrane protein 2; LPS: lipopolysaccharide; MAP1LC3B/LC3B: microtubule-associated protein 1 light chain 3 beta; MTEC: mouse tracheal epithelial cells; MTOR: mechanistic target of rapamycin kinase; MYD88: MYD88 innate immune signal transduction adaptor; NFKB: nuclear factor of kappa B; NFKBIA: NFKB inhibitor alpha; PM: particulate matter; PtdIns3K: phosphatidylinositol 3-kinase; Rapa: rapamycin; RELA: RELA proto-oncogene, NFKB subunit; SCGB1A1: secretoglobin family 1A member 1; siRNA: small interfering RNAs; SQSTM1: sequestosome 1; TEM: transmission electronic microscopy; TLR4: toll like receptor 4; TSC2: TSC complex subunit 2.
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Affiliation(s)
- Yin-Fang Wu
- Key Laboratory of Respiratory Disease of Zhejiang Province, Department of Respiratory and Critical Care Medicine, Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - Zhou-Yang Li
- Key Laboratory of Respiratory Disease of Zhejiang Province, Department of Respiratory and Critical Care Medicine, Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - Ling-Ling Dong
- Key Laboratory of Respiratory Disease of Zhejiang Province, Department of Respiratory and Critical Care Medicine, Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - Wei-Jie Li
- Key Laboratory of Respiratory Disease of Zhejiang Province, Department of Respiratory and Critical Care Medicine, Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - Yan-Ping Wu
- Key Laboratory of Respiratory Disease of Zhejiang Province, Department of Respiratory and Critical Care Medicine, Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - Jing Wang
- Department of Polymer Science and Engineering, Zhejiang University, Hangzhou, Zhejiang, China
| | - Hai-Pin Chen
- Key Laboratory of Respiratory Disease of Zhejiang Province, Department of Respiratory and Critical Care Medicine, Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - Hui-Wen Liu
- Key Laboratory of Respiratory Disease of Zhejiang Province, Department of Respiratory and Critical Care Medicine, Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - Miao Li
- Key Laboratory of Respiratory Disease of Zhejiang Province, Department of Respiratory and Critical Care Medicine, Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - Ci-Liang Jin
- Key Laboratory of Respiratory Disease of Zhejiang Province, Department of Respiratory and Critical Care Medicine, Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - Hua-Qiong Huang
- Key Laboratory of Respiratory Disease of Zhejiang Province, Department of Respiratory and Critical Care Medicine, Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - Song-Min Ying
- Key Laboratory of Respiratory Disease of Zhejiang Province, Department of Respiratory and Critical Care Medicine, Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - Wen Li
- Key Laboratory of Respiratory Disease of Zhejiang Province, Department of Respiratory and Critical Care Medicine, Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - Hua-Hao Shen
- Key Laboratory of Respiratory Disease of Zhejiang Province, Department of Respiratory and Critical Care Medicine, Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
- State Key Lab of Respiratory Disease, Key cite of National Clinical Research Center for Respiratory Disease, Guangzhou, China
| | - Zhi-Hua Chen
- Key Laboratory of Respiratory Disease of Zhejiang Province, Department of Respiratory and Critical Care Medicine, Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
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22
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Gao L, Yuan H, Xu E, Liu J. Toxicology of paraquat and pharmacology of the protective effect of 5-hydroxy-1-methylhydantoin on lung injury caused by paraquat based on metabolomics. Sci Rep 2020; 10:1790. [PMID: 32019966 PMCID: PMC7000692 DOI: 10.1038/s41598-020-58599-y] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2019] [Accepted: 01/17/2020] [Indexed: 11/28/2022] Open
Abstract
Paraquat (PQ) is a non-selective herbicide and is exceedingly toxic to humans. The mechanism of PQ toxicity is very complex and has not been clearly defined. There is no specific antidote for PQ poisoning. 5-hydroxy-1-methylhydantoin (HMH) is an intrinsic antioxidant and can protect against renal damage caused by PQ. The mechanism of PQ toxicology and the possible effects of HMH on PQ-induced lung injury were determined in this study. It was found that PQ decreased superoxide dismutase (SOD) activity and elevated the level of malondialdehyde (MDA), while HMH elevated SOD activity and decreased the level of MDA. Based on metabolomics, the citrate cycle, glutathione metabolism, taurine and hypotaurine metabolism, regulation of lipolysis in adipocytes, inflammatory mediator regulation of TRP channels, purine and pyrimidine metabolism, aldosterone synthesis and secretion, and phenylalanine metabolism were changed in the PQ group. Compared with the PQ group, the levels of N-acetyl-l-aspartic acid, L-glutamic acid, L-aspartic acid, mesaconic acid, adenosine 5′ monophosphate, methylmalonic acid, cytidine, phosphonoacetic acid, hypotaurine, glutathione (reduced) and cysteinylglycine increased, while the levels of corticosterone, xanthine, citric acid, prostaglandin G2, 4-pyridoxic acid and succinyl proline decreased in the HMH group. These metabolites revealed that HMH can alleviate inflammation caused by PQ and elevate the activity of intrinsic antioxidants. In conclusion, our results revealed PQ toxicology and the pharmacology underlying the protective effect of HMH on lung injury due to PQ. Toxicity caused by PQ results in lipid peroxidation and an increase in reactive oxygen species (ROS), nitric oxide (NO), damage to the biliary system, gastrointestinal system and nervous system, in addition to lungs, kidneys, and the liver. HMH is a good antioxidant and protects against lung injury caused by PQ. In summary, HMH efficiently reduced PQ-induced lung injury in mice.
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Affiliation(s)
- Lina Gao
- School of Forensic Medicine, China Medical University, Liaoning, 110014, China.
| | - Huiya Yuan
- School of Forensic Medicine, China Medical University, Liaoning, 110014, China
| | - Enyu Xu
- School of Forensic Medicine, China Medical University, Liaoning, 110014, China
| | - Junting Liu
- School of Forensic Medicine, China Medical University, Liaoning, 110014, China
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23
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Gao Y, You X, Liu Y, Gao F, Zhang Y, Yang J, Yang C. Induction of autophagy protects human dental pulp cells from lipopolysaccharide-induced pyroptotic cell death. Exp Ther Med 2020; 19:2202-2210. [PMID: 32104285 PMCID: PMC7027320 DOI: 10.3892/etm.2020.8475] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2019] [Accepted: 11/01/2019] [Indexed: 02/06/2023] Open
Abstract
The NOD-like receptor protein 3/caspase-1 inflammasome can be activated in human dental pulp tissue and fibroblasts; however, the underlying mechanisms are poorly understood. In the present study, lipopolysaccharide (LPS) was used to treat dental pulp cells to establish an inflammation model. Cell viability was examined by sulforhodamine B assay. Interleukin (IL)-1β, caspase-1, microtubule-associated protein-1 light chain 3-II/I and p62 were determined by western blotting and ELISA. The phosphorylation (p-) levels of NF-κB and NF-κB inhibitor (IκB)α protein were observed by western blotting. The results demonstrated that LPS induced pyroptotic cell death in cultured dental pulp cells, which was supported by the increased levels of IL-1β, IL-18 and caspase-1. Rapamycin and 3-methyladenine (3-MA) were used to activate and inhibit autophagy, and it was observed that LPS increased autophagy and rapamycin reduced LPS-induced dental pulp cell pyroptosis. However, 3-MA aggravated LPS-induced dental pulp cell pyroptosis. In addition, LPS inhibited the expression of IκBα, but increased the expression of p-NF-κB. Compared with the LPS group, 3-MA further inhibited the expression of IκBα but promoted the expression of p-NF-κB. However, rapamycin produced the opposite results to LPS. Under LPS treatment, the NF-κB pathway inhibitor BAY11-7082 further enhanced the inhibitory effects of rapamycin, but inhibited the promoting effects of 3-MA on the protein expression levels of IL-1β and caspase-1. The results of the present study demonstrated that there is an important crosstalk between autophagy, pyroptosis and the NF-κB pathway, and that the modulation of pyroptosis in dental pulp cells may be a promising strategy to pulpitis therapy.
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Affiliation(s)
- Yang Gao
- Jiangsu Key Laboratory of Oral Disease, The Affiliated Hospital of Stomatology, Nanjing Medical University, Nanjing, Jiangsu 210029, P.R. China.,Department of Oral and Maxillofacial Surgery, The Affiliated Hospital of Stomatology, Nanjing Medical University, Nanjing, Jiangsu 210029, P.R. China.,Department of Stomatology, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215000, P.R. China
| | - Xinran You
- Department of Nuclear Medicine, The Affiliated Suzhou Hospital of Nanjing Medical University, Suzhou, Jiangsu 215002, P.R. China
| | - Yubo Liu
- Department of Orthopedics, The Affiliated Suzhou Hospital of Nanjing Medical University, Suzhou, Jiangsu 215002, P.R. China
| | - Fei Gao
- Department of Nuclear Medicine, The Affiliated Suzhou Hospital of Nanjing Medical University, Suzhou, Jiangsu 215002, P.R. China
| | - Yuan Zhang
- Department of Head and Neck Oncology, The Affiliated Jiangsu Cancer Hospital of Nanjing Medical University, Nanjing, Jiangsu 210009, P.R. China
| | - Jianrong Yang
- Jiangsu Key Laboratory of Oral Disease, The Affiliated Hospital of Stomatology, Nanjing Medical University, Nanjing, Jiangsu 210029, P.R. China.,Department of Oral and Maxillofacial Surgery, The Affiliated Hospital of Stomatology, Nanjing Medical University, Nanjing, Jiangsu 210029, P.R. China
| | - Chen Yang
- Department of Nuclear Medicine, The Affiliated Suzhou Hospital of Nanjing Medical University, Suzhou, Jiangsu 215002, P.R. China
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24
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Jagrosse ML, Dean DA, Rahman A, Nilsson BL. RNAi therapeutic strategies for acute respiratory distress syndrome. Transl Res 2019; 214:30-49. [PMID: 31401266 PMCID: PMC7316156 DOI: 10.1016/j.trsl.2019.07.011] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/02/2019] [Revised: 07/22/2019] [Accepted: 07/23/2019] [Indexed: 12/11/2022]
Abstract
Acute respiratory distress syndrome (ARDS), replacing the clinical term acute lung injury, involves serious pathophysiological lung changes that arise from a variety of pulmonary and nonpulmonary injuries and currently has no pharmacological therapeutics. RNA interference (RNAi) has the potential to generate therapeutic effects that would increase patient survival rates from this condition. It is the purpose of this review to discuss potential targets in treating ARDS with RNAi strategies, as well as to outline the challenges of oligonucleotide delivery to the lung and tactics to circumvent these delivery barriers.
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Affiliation(s)
| | - David A Dean
- Department of Pediatrics and Neonatology, University of Rochester Medical Center, School of Medicine and Dentistry, University of Rochester, Rochester, New York
| | - Arshad Rahman
- Department of Pediatrics and Neonatology, University of Rochester Medical Center, School of Medicine and Dentistry, University of Rochester, Rochester, New York
| | - Bradley L Nilsson
- Department of Chemistry, University of Rochester, Rochester, New York.
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25
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Layoun A, Goldberg AA, Baig A, Eng M, Attias O, Nelson K, Carella A, Amberber N, Fielhaber JA, Joung KB, Schmeing TM, Han Y, Downey J, Divangahi M, Roux PP, Kristof AS. Regulation of protein kinase Cδ Nuclear Import and Apoptosis by Mechanistic Target of Rapamycin Complex-1. Sci Rep 2019; 9:17620. [PMID: 31772273 PMCID: PMC6879585 DOI: 10.1038/s41598-019-53909-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2019] [Accepted: 10/24/2019] [Indexed: 11/09/2022] Open
Abstract
Inactivation of the protein complex ‘mechanistic target of rapamycin complex 1’ (mTORC1) can increase the nuclear content of transcriptional regulators of metabolism and apoptosis. Previous studies established that nuclear import of signal transducer and activator of transcription-1 (STAT1) requires the mTORC1-associated adaptor karyopherin-α1 (KPNA1) when mTORC1 activity is reduced. However, the role of other mTORC1-interacting proteins in the complex, including ‘protein kinase C delta’ (PKCδ), have not been well characterized. In this study, we demonstrate that PKCδ, a STAT1 kinase, contains a functional ‘target of rapamycin signaling’ (TOS) motif that directs its interaction with mTORC1. Depletion of KPNA1 by RNAi prevented the nuclear import of PKCδ in cells exposed to the mTORC1 inhibitor rapamycin or amino acid restriction. Mutation of the TOS motif in PKCδ led to its loss of regulation by mTORC1 or karyopherin-α1, resulting in increased constitutive nuclear content. In cells expressing wild-type PKCδ, STAT1 activity and apoptosis were increased by rapamycin or interferon-β. Those expressing the PKCδ TOS mutant exhibited increased STAT1 activity and apoptosis; further enhancement by rapamycin or interferon-β, however, was lost. Therefore, the TOS motif in PKCδ is a novel structural mechanism by which mTORC1 prevents PKCδ and STAT1 nuclear import, and apoptosis.
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Affiliation(s)
- Antonio Layoun
- Meakins-Christie Laboratories and Translational Research in Respiratory Diseases Program, Research Institute of the McGill University Health Centre, Faculty of Medicine, Departments of Medicine and Critical Care, 1001 Décarie Boulevard, EM3.2219, Montreal, Québec, H4A 3J1, Canada
| | - Alexander A Goldberg
- Meakins-Christie Laboratories and Translational Research in Respiratory Diseases Program, Research Institute of the McGill University Health Centre, Faculty of Medicine, Departments of Medicine and Critical Care, 1001 Décarie Boulevard, EM3.2219, Montreal, Québec, H4A 3J1, Canada
| | - Ayesha Baig
- Meakins-Christie Laboratories and Translational Research in Respiratory Diseases Program, Research Institute of the McGill University Health Centre, Faculty of Medicine, Departments of Medicine and Critical Care, 1001 Décarie Boulevard, EM3.2219, Montreal, Québec, H4A 3J1, Canada
| | - Mikaela Eng
- Meakins-Christie Laboratories and Translational Research in Respiratory Diseases Program, Research Institute of the McGill University Health Centre, Faculty of Medicine, Departments of Medicine and Critical Care, 1001 Décarie Boulevard, EM3.2219, Montreal, Québec, H4A 3J1, Canada
| | - Ortal Attias
- Meakins-Christie Laboratories and Translational Research in Respiratory Diseases Program, Research Institute of the McGill University Health Centre, Faculty of Medicine, Departments of Medicine and Critical Care, 1001 Décarie Boulevard, EM3.2219, Montreal, Québec, H4A 3J1, Canada
| | - Kristoff Nelson
- Meakins-Christie Laboratories and Translational Research in Respiratory Diseases Program, Research Institute of the McGill University Health Centre, Faculty of Medicine, Departments of Medicine and Critical Care, 1001 Décarie Boulevard, EM3.2219, Montreal, Québec, H4A 3J1, Canada
| | - Alexandra Carella
- Meakins-Christie Laboratories and Translational Research in Respiratory Diseases Program, Research Institute of the McGill University Health Centre, Faculty of Medicine, Departments of Medicine and Critical Care, 1001 Décarie Boulevard, EM3.2219, Montreal, Québec, H4A 3J1, Canada
| | - Nahomi Amberber
- Meakins-Christie Laboratories and Translational Research in Respiratory Diseases Program, Research Institute of the McGill University Health Centre, Faculty of Medicine, Departments of Medicine and Critical Care, 1001 Décarie Boulevard, EM3.2219, Montreal, Québec, H4A 3J1, Canada
| | - Jill A Fielhaber
- Meakins-Christie Laboratories and Translational Research in Respiratory Diseases Program, Research Institute of the McGill University Health Centre, Faculty of Medicine, Departments of Medicine and Critical Care, 1001 Décarie Boulevard, EM3.2219, Montreal, Québec, H4A 3J1, Canada
| | - Kwang-Bo Joung
- Meakins-Christie Laboratories and Translational Research in Respiratory Diseases Program, Research Institute of the McGill University Health Centre, Faculty of Medicine, Departments of Medicine and Critical Care, 1001 Décarie Boulevard, EM3.2219, Montreal, Québec, H4A 3J1, Canada
| | - T Martin Schmeing
- Department of Biochemistry, McGill University, Montréal, Québec, H3G 0B1, Canada
| | - Yingshan Han
- Meakins-Christie Laboratories and Translational Research in Respiratory Diseases Program, Research Institute of the McGill University Health Centre, Faculty of Medicine, Departments of Medicine and Critical Care, 1001 Décarie Boulevard, EM3.2219, Montreal, Québec, H4A 3J1, Canada
| | - Jeffrey Downey
- Meakins-Christie Laboratories and Translational Research in Respiratory Diseases Program, Research Institute of the McGill University Health Centre, 1001 Décarie Boulevard, EM3.2219, Montréal, Québec, H4A 3J1, Canada
| | - Maziar Divangahi
- Meakins-Christie Laboratories and Translational Research in Respiratory Diseases Program, Research Institute of the McGill University Health Centre, 1001 Décarie Boulevard, EM3.2219, Montréal, Québec, H4A 3J1, Canada
| | - Philippe P Roux
- Institute for Research in Immunology and Cancer, Faculty of Medicine, University of Montreal, P.O. Box 6128, Station Centre-Ville, Montréal, Québec, H3C 2J7, Canada
| | - Arnold S Kristof
- Meakins-Christie Laboratories and Translational Research in Respiratory Diseases Program, Research Institute of the McGill University Health Centre, Faculty of Medicine, Departments of Medicine and Critical Care, 1001 Décarie Boulevard, EM3.2219, Montreal, Québec, H4A 3J1, Canada.
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26
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Sun Y, Yao X, Zhang QJ, Zhu M, Liu ZP, Ci B, Xie Y, Carlson D, Rothermel BA, Sun Y, Levine B, Hill JA, Wolf SE, Minei JP, Zang QS. Beclin-1-Dependent Autophagy Protects the Heart During Sepsis. Circulation 2019; 138:2247-2262. [PMID: 29853517 DOI: 10.1161/circulationaha.117.032821] [Citation(s) in RCA: 242] [Impact Index Per Article: 48.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
BACKGROUND Cardiac dysfunction is a major component of sepsis-induced multiorgan failure in critical care units. Changes in cardiac autophagy and its role during sepsis pathogenesis have not been clearly defined. Targeted autophagy-based therapeutic approaches for sepsis are not yet developed. METHODS Beclin-1-dependent autophagy in the heart during sepsis and the potential therapeutic benefit of targeting this pathway were investigated in a mouse model of lipopolysaccharide (LPS)-induced sepsis. RESULTS LPS induced a dose-dependent increase in autophagy at low doses, followed by a decline that was in conjunction with mammalian target of rapamycin activation at high doses. Cardiac-specific overexpression of Beclin-1 promoted autophagy, suppressed mammalian target of rapamycin signaling, improved cardiac function, and alleviated inflammation and fibrosis after LPS challenge. Haplosufficiency for beclin 1 resulted in opposite effects. Beclin-1 also protected mitochondria, reduced the release of mitochondrial danger-associated molecular patterns, and promoted mitophagy via PTEN-induced putative kinase 1-Parkin but not adaptor proteins in response to LPS. Injection of a cell-permeable Tat-Beclin-1 peptide to activate autophagy improved cardiac function, attenuated inflammation, and rescued the phenotypes caused by beclin 1 deficiency in LPS-challenged mice. CONCLUSIONS These results suggest that Beclin-1 protects the heart during sepsis and that the targeted induction of Beclin-1 signaling may have important therapeutic potential.
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Affiliation(s)
- Yuxiao Sun
- Departments of Surgery (Y.S., X.Y., D.C., S.E.W., J.P.M., Q.S.Z.), University of Texas Southwestern Medical Center, Dallas
| | - Xiao Yao
- Departments of Surgery (Y.S., X.Y., D.C., S.E.W., J.P.M., Q.S.Z.), University of Texas Southwestern Medical Center, Dallas
| | - Qing-Jun Zhang
- Internal Medicine, Cardiology Division (Q.-J.Z., M.Z., Z.-P.L., B.A.R., J.A.H.), University of Texas Southwestern Medical Center, Dallas
| | - Min Zhu
- Internal Medicine, Cardiology Division (Q.-J.Z., M.Z., Z.-P.L., B.A.R., J.A.H.), University of Texas Southwestern Medical Center, Dallas
| | - Zhi-Ping Liu
- Internal Medicine, Cardiology Division (Q.-J.Z., M.Z., Z.-P.L., B.A.R., J.A.H.), University of Texas Southwestern Medical Center, Dallas
| | - Bo Ci
- Clinical Science, Quantitative Biomedical Research Center (B.C., Y.X.), University of Texas Southwestern Medical Center, Dallas
| | - Yang Xie
- Clinical Science, Quantitative Biomedical Research Center (B.C., Y.X.), University of Texas Southwestern Medical Center, Dallas
| | - Deborah Carlson
- Departments of Surgery (Y.S., X.Y., D.C., S.E.W., J.P.M., Q.S.Z.), University of Texas Southwestern Medical Center, Dallas
| | - Beverly A Rothermel
- Internal Medicine, Cardiology Division (Q.-J.Z., M.Z., Z.-P.L., B.A.R., J.A.H.), University of Texas Southwestern Medical Center, Dallas
| | - Yuxiang Sun
- Department of Nutrition and Food Science, Texas A&M University, College Station (Y.S.)
| | - Beth Levine
- Internal Medicine, Center for Autophagy Research, Howard Hughes Medical Institute (B.L.), University of Texas Southwestern Medical Center, Dallas
| | - Joseph A Hill
- Internal Medicine, Cardiology Division (Q.-J.Z., M.Z., Z.-P.L., B.A.R., J.A.H.), University of Texas Southwestern Medical Center, Dallas
| | - Steven E Wolf
- Departments of Surgery (Y.S., X.Y., D.C., S.E.W., J.P.M., Q.S.Z.), University of Texas Southwestern Medical Center, Dallas
| | - Joseph P Minei
- Departments of Surgery (Y.S., X.Y., D.C., S.E.W., J.P.M., Q.S.Z.), University of Texas Southwestern Medical Center, Dallas
| | - Qun S Zang
- Departments of Surgery (Y.S., X.Y., D.C., S.E.W., J.P.M., Q.S.Z.), University of Texas Southwestern Medical Center, Dallas
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27
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Park BH, Shin MH, Douglas IS, Chung KS, Song JH, Kim SY, Kim EY, Jung JY, Kang YA, Chang J, Kim YS, Park MS. Erythropoietin-Producing Hepatoma Receptor Tyrosine Kinase A2 Modulation Associates with Protective Effect of Prone Position in Ventilator-induced Lung Injury. Am J Respir Cell Mol Biol 2019; 58:519-529. [PMID: 29216437 DOI: 10.1165/rcmb.2017-0143oc] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
The erythropoietin-producing hepatoma (Eph) receptor tyrosine kinase A2 (EphA2) and its ligand, ephrinA1, play a pivotal role in inflammation and tissue injury by modulating the epithelial and endothelial barrier integrity. Therefore, EphA2 receptor may be a potential therapeutic target for modulating ventilator-induced lung injury (VILI). To support this hypothesis, here, we analyzed EphA2/ephrinA1 signaling in the process of VILI and determined the role of EphA2/ephrinA1 signaling in the protective mechanism of prone positioning in a VILI model. Wild-type mice were ventilated with high (24 ml/kg; positive end-expiratory pressure, 0 cm; 5 h) tidal volume in a supine or prone position. Anti-EphA2 receptor antibody or IgG was administered to the supine position group. Injury was assessed by analyzing the BAL fluid, lung injury scoring, and transmission electron microscopy. Lung lysates were evaluated using cytokine/chemokine ELISA and Western blotting of EphA2, ephrinA1, PI3Kγ, Akt, NF-κB, and P70S6 kinase. EphA2/ephrinA1 expression was higher in the supine high tidal volume group than in the control group, but it did not increase upon prone positioning or anti-EphA2 receptor antibody treatment. EphA2 antagonism reduced the extent of VILI and downregulated the expression of PI3Kγ, Akt, NF-κB, and P70S6 kinase. These findings demonstrate that EphA2/ephrinA1 signaling is involved in the molecular mechanism of VILI and that modulation of EphA2/ehprinA1 signaling by prone position or EphA2 antagonism may be associated with the lung-protective effect. Our data provide evidence for EphA2/ehprinA1 as a promising therapeutic target for modulating VILI.
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Affiliation(s)
- Byung Hoon Park
- 1 Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Gyeonggi Provincial Medical Center Paju Hospital, Paju City, Gyeonggi-Do, Republic of Korea
| | - Mi Hwa Shin
- 2 Division of Pulmonology, The Institute of Chest Diseases, Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Republic of Korea; and
| | - Ivor S Douglas
- 3 Division of Pulmonary Sciences and Critical Care Medicine, Denver Health Medical Center, University of Colorado School of Medicine, Denver, Colorado
| | - Kyung Soo Chung
- 2 Division of Pulmonology, The Institute of Chest Diseases, Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Republic of Korea; and
| | - Joo Han Song
- 2 Division of Pulmonology, The Institute of Chest Diseases, Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Republic of Korea; and
| | - Song Yee Kim
- 2 Division of Pulmonology, The Institute of Chest Diseases, Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Republic of Korea; and
| | - Eun Young Kim
- 2 Division of Pulmonology, The Institute of Chest Diseases, Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Republic of Korea; and
| | - Ji Ye Jung
- 2 Division of Pulmonology, The Institute of Chest Diseases, Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Republic of Korea; and
| | - Young Ae Kang
- 2 Division of Pulmonology, The Institute of Chest Diseases, Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Republic of Korea; and
| | - Joon Chang
- 2 Division of Pulmonology, The Institute of Chest Diseases, Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Republic of Korea; and
| | - Young Sam Kim
- 2 Division of Pulmonology, The Institute of Chest Diseases, Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Republic of Korea; and
| | - Moo Suk Park
- 2 Division of Pulmonology, The Institute of Chest Diseases, Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Republic of Korea; and
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28
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Shibata Y, Maruyama H, Hayashi T, Ono H, Wada Y, Fujinaga H, Fujino S, Nagasawa J, Amari S, Tsukamoto K, Ito Y. Effect and Complications of Everolimus Use for Giant Cardiac Rhabdomyomas with Neonatal Tuberous Sclerosis. AJP Rep 2019; 9:e213-e217. [PMID: 31304050 PMCID: PMC6624115 DOI: 10.1055/s-0039-1692198] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/08/2018] [Accepted: 03/05/2019] [Indexed: 12/16/2022] Open
Abstract
Most cardiac rhabdomyomas with tuberous sclerosis (TS) are asymptomatic and spontaneously regress. However, some cases require surgical intervention due to arrhythmia and severe obstruction of cardiac inflow or outflow. We report herein a neonatal case of giant cardiac rhabdomyomas with TS and insufficient pulmonary blood flow from the right ventricle. Lipoprostaglandin E1 was necessary to maintain patency of the ductus arteriosus. We used everolimus, a mammalian target of rapamycin inhibitor, to diminish the cardiac rhabdomyomas. After treatment, the rhabdomyomas shrank rapidly, but the serum concentration of everolimus increased sharply (maximum serum trough level: 76.1 ng/mL) and induced complications including pulmonary hemorrhage, liver dysfunction, and acne. After the everolimus level decreased, the complications resolved. Everolimus may be a viable treatment option for rhabdomyomas, but its concentration requires close monitoring to circumvent complications associated with its use.
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Affiliation(s)
- Yuka Shibata
- Division of Neonatology, Center for Maternal-Fetal, Neonatal and Reproductive Medicine, Setagaya, Tokyo, Japan
| | - Hidehiko Maruyama
- Division of Neonatology, Center for Maternal-Fetal, Neonatal and Reproductive Medicine, Setagaya, Tokyo, Japan
| | - Taiyu Hayashi
- Division of Cardiology, National Center for Child Health and Development, Setagaya, Tokyo, Japan
| | - Hiroshi Ono
- Division of Cardiology, National Center for Child Health and Development, Setagaya, Tokyo, Japan
| | - Yuka Wada
- Division of Neonatology, Center for Maternal-Fetal, Neonatal and Reproductive Medicine, Setagaya, Tokyo, Japan
| | - Hideshi Fujinaga
- Division of Neonatology, Center for Maternal-Fetal, Neonatal and Reproductive Medicine, Setagaya, Tokyo, Japan
| | - Shuhei Fujino
- Division of Neonatology, Center for Maternal-Fetal, Neonatal and Reproductive Medicine, Setagaya, Tokyo, Japan
| | - Junko Nagasawa
- Division of Neonatology, Center for Maternal-Fetal, Neonatal and Reproductive Medicine, Setagaya, Tokyo, Japan
| | - Shoichiro Amari
- Division of Neonatology, Center for Maternal-Fetal, Neonatal and Reproductive Medicine, Setagaya, Tokyo, Japan
| | - Keiko Tsukamoto
- Division of Neonatology, Center for Maternal-Fetal, Neonatal and Reproductive Medicine, Setagaya, Tokyo, Japan
| | - Yushi Ito
- Division of Neonatology, Center for Maternal-Fetal, Neonatal and Reproductive Medicine, Setagaya, Tokyo, Japan
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29
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Allen SD, Liu YG, Kim T, Bobbala S, Yi S, Zhang X, Choi J, Scott EA. Celastrol-loaded PEG-b-PPS nanocarriers as an anti-inflammatory treatment for atherosclerosis. Biomater Sci 2019; 7:657-668. [PMID: 30601470 DOI: 10.1039/c8bm01224e] [Citation(s) in RCA: 55] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
In this work, the hydrophobic small molecule NF-κB inhibitor celastrol was loaded into poly(ethylene glycol)-b-poly(propylene sulfide) (PEG-b-PPS) micelles. PEG-b-PPS micelles demonstrated high loading efficiency, low polydispersity, and no morphological changes upon loading with celastrol. Encapsulation of celastrol within these nanocarriers significantly reduced cytotoxicity compared to free celastrol, while simultaneously expanding the lower concentration range for effective inhibition of NF-κB signaling by nearly 50 000-fold. Furthermore, celastrol-loaded micelles successfully reduced TNF-α secretion after LPS stimulation of RAW 264.7 cells and reduced the number of neutrophils and inflammatory monocytes within atherosclerotic plaques of ldlr-/- mice. This reduction in inflammatory cells was matched by a reduction in plaque area, suggesting that celastrol-loaded nanocarriers may serve as an anti-inflammatory treatment for atherosclerosis.
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Affiliation(s)
- Sean D Allen
- Interdepartmental Biological Sciences Program, Northwestern University, Evanston, IL 60628, USA
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Uncoupling Protein 2 Drives Myocardial Dysfunction in Murine Models of Septic Shock. BIOMED RESEARCH INTERNATIONAL 2019; 2019:9786101. [PMID: 31080837 PMCID: PMC6475535 DOI: 10.1155/2019/9786101] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/03/2018] [Revised: 02/12/2019] [Accepted: 03/20/2019] [Indexed: 01/20/2023]
Abstract
Cardiac dysfunction is a major component of sepsis-induced multiorgan failure in critical care units. Uncoupling protein 2 (UCP2) involves immune response, regulation of oxidative stress, and maintenance of mitochondrial membrane potential as well as energy production. However, whether and how UCP2 plays roles in the development of septic cardiac dysfunction are largely unknown. Here, intraperitoneal injection of LPS significantly activated UCP2 expression accompanied by a significant decrease of cardiac function and caused a significantly lower survival rate in mice. Of note, knockdown of UCP2 through a cardiotropic adenoassociated viral vector carrying a short hairpin RNA (shRNA) specifically targeting the UCP2 evoked resistance to LPS-triggered septic cardiac dysfunction and lethality in vivo. Moreover, UCP2 deficiency ameliorated the reduced levels of intracellular ATP in the LPS-challenged heart tissues and preserved mitochondrial membrane potential loss in primary adult mouse cardiomyocytes in LPS-challenged animals. Mechanistically, we confirmed that the inhibition of UCP2 promoted autophagy in response to LPS, as shown by an increase in LC3II and a decrease in p62. At last, the autophagy inhibitor 3-MA abolished UCP2 knockdown-afforded cardioprotective effects. Those results indicate that UCP2 drives septic cardiac dysfunction and that the targeted induction of UCP2-mediated autophagy may have important therapeutic potential.
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Sun Y, Cai Y, Zang QS. Cardiac Autophagy in Sepsis. Cells 2019; 8:cells8020141. [PMID: 30744190 PMCID: PMC6406743 DOI: 10.3390/cells8020141] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2018] [Revised: 02/02/2019] [Accepted: 02/05/2019] [Indexed: 02/06/2023] Open
Abstract
Sepsis is a leading cause of death in intensive care units, and cardiac dysfunction is an identified serious component of the multi-organ failure associated with this critical condition. This review summarized the current discoveries and hypotheses of how autophagy changes in the heart during sepsis and the underlying mechanisms. Recent investigations suggest that specific activation of autophagy initiation factor Beclin-1 has a potential to protect cardiac mitochondria, attenuate inflammation, and improve cardiac function in sepsis. Accordingly, pharmacological interventions targeting this pathway have a potential to become an effective approach to control sepsis outcomes. The role of autophagy during sepsis pathogenesis has been under intensive investigation in recent years. It is expected that developing therapeutic approaches with specificities targeting at autophagy regulatory factors may provide new opportunities to alleviate organ dysfunction caused by maladaptive autophagy during sepsis.
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Affiliation(s)
- Yuxiao Sun
- Departments of Surgery, University of Texas Southwestern Medical Center, 75390 Dallas, TX, USA.
| | - Ying Cai
- Department of Developmental Cell Biology, School of Life Sciences, China Medical University, 77 Puhe Road, Shenbei New District, 110122 Shenyang, China.
| | - Qun S Zang
- Departments of Surgery, University of Texas Southwestern Medical Center, 75390 Dallas, TX, USA.
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Jia X, Cao B, An Y, Zhang X, Wang C. Rapamycin ameliorates lipopolysaccharide-induced acute lung injury by inhibiting IL-1β and IL-18 production. Int Immunopharmacol 2018; 67:211-219. [PMID: 30557824 DOI: 10.1016/j.intimp.2018.12.017] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2018] [Revised: 11/30/2018] [Accepted: 12/07/2018] [Indexed: 01/06/2023]
Abstract
Interleukin (IL)-1β and IL-18 play central and detrimental roles in the development of acute lung injury (ALI), and mammalian target of rapamycin (mTOR) is involved in regulating IL-1β and IL-18 production. However, it is not clear whether the mTOR specific inhibitor rapamycin can attenuate lipopolysaccharide (LPS)-induced ALI by modulating IL-1β and IL-18 production. In this study, we found that rapamycin ameliorated LPS-induced ALI by inhibiting NOD-like receptor family pyrin domain containing 3 (NLRP3) inflammasome-mediated IL-1β and IL-18 secretion. Mechanistically, elevated autophagy and decreased nuclear factor (NF)-κB activation were associated with downregulated IL-1β and IL-18. Moreover, rapamycin reduced leukocyte infiltration in the lung tissue and bronchoalveolar lavage fluid (BALF), and contributed to the alleviation of LPS-induced ALI. Consistently, rapamycin also significantly inhibited IL-1β and IL-18 production by RAW264.7 cells via increased autophagy and decreased NF-κB signaling in vitro. Our results demonstrated that rapamycin protects mice against LPS-induced ALI partly by inhibiting the production and secretion of IL-1β and IL-18. mTOR and rapamycin might represent an appropriate therapeutic target and strategy for preventing ALI induced by LPS.
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Affiliation(s)
- Xuehong Jia
- Department of Respiratory Medicine, Beijing Tiantan Hospital, Capital Medical University, Beijing 100050, China; Peking University China-Japan Friendship School of Clinical Medicine, Beijing 100029, China
| | - Bin Cao
- Department of Pulmonary and Critical Care Medicine, Center for Respiratory Diseases, China-Japan Friendship Hospital, Beijing 100029, China; National Clinical Research Center for Respiratory Diseases, Beijing 100029, China; Department of Respiratory Medicine, Capital Medical University, Beijing 100069, China
| | - Yunqing An
- Department of Immunology, School of Basic Medical Sciences, Capital Medical University, Beijing 100069, China
| | - Xulong Zhang
- Department of Immunology, School of Basic Medical Sciences, Capital Medical University, Beijing 100069, China.
| | - Chen Wang
- Peking University China-Japan Friendship School of Clinical Medicine, Beijing 100029, China; Department of Pulmonary and Critical Care Medicine, Center for Respiratory Diseases, China-Japan Friendship Hospital, Beijing 100029, China; National Clinical Research Center for Respiratory Diseases, Beijing 100029, China; Department of Respiratory Medicine, Capital Medical University, Beijing 100069, China; Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing 100730, China.
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Li B, Xi P, Wang Z, Han X, Xu Y, Zhang Y, Miao J. PI3K/Akt/mTOR signaling pathway participates in Streptococcus uberis-induced inflammation in mammary epithelial cells in concert with the classical TLRs/NF-ĸB pathway. Vet Microbiol 2018; 227:103-111. [PMID: 30473339 DOI: 10.1016/j.vetmic.2018.10.031] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2018] [Revised: 10/30/2018] [Accepted: 10/31/2018] [Indexed: 12/21/2022]
Abstract
Mammary epithelial cells (MECs) play an important role in debating Streptococcus uberis (S. uberis) infection. Toll like receptor (TLR) engagement leads to the recruitment of phosphatidylinositol 3 kinases (PI3K). In order to investigate the relationship of TLRs/NF-κB and PI3K/Akt/mTOR signaling pathways in S. uberis infection in MECs, we challenged MECs (EpH4-Ev) with S. uberis 0140 J and quantified the adaptor molecules in these two signaling pathways, as-well-as proinflammatory cytokines and cell damage. The results indicate that the host's responses to virulent S. uberis infection are complex. In MECs, both TLR2 and TLR4 are detecting S. uberis infection and TLR2 is the principal receptor. The role of the PI3K/Akt/mTOR pathway in inflammatory regulation is independent of the activation of TLRs/NF-κB. Cross-talk between PI3K/Akt/mTOR and TLRs/NF-κB signaling pathways promote inflammation. This study increases our understanding of the molecular defense mechanisms of MECs in S. uberis mastitis, and provides theoretical support for the prevention of this disease.
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Affiliation(s)
- Bin Li
- MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, China
| | - Panpan Xi
- MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, China
| | - Zhenglei Wang
- MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, China
| | - Xiangan Han
- Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Shanghai, 200241, China
| | - Yuanyuan Xu
- MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, China
| | - Yuanshu Zhang
- MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, China
| | - Jinfeng Miao
- MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, China.
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Li L, Mok H, Jhaveri P, Bonnen MD, Sikora AG, Eissa NT, Komaki RU, Ghebre YT. Anticancer therapy and lung injury: molecular mechanisms. Expert Rev Anticancer Ther 2018; 18:1041-1057. [PMID: 29996062 PMCID: PMC6290681 DOI: 10.1080/14737140.2018.1500180] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
INTRODUCTION Chemotherapy and radiation therapy are two mainstream strategies applied in the treatment of cancer that is not operable. Patients with hematological or solid tumor malignancies substantially benefit from chemotherapeutic drugs and/or ionizing radiation delivered to the site of malignancy. However, considerable adverse effects, including lung inflammation and fibrosis, are associated with the use of these treatment modalities. Areas covered: As we move toward the era of precision health, we are compelled to understand the molecular basis of chemoradiation-induced pathological lung remodeling and to develop effective treatment strategies that mitigate the development of chronic lung disease (i.e. fibrosis) in cancer patients. The review discusses chemotherapeutic agents that are reported to induce or associate with acute and/or chronic lung injury. Expert commentary: There is a need to molecularly understand how chemotherapeutic drugs induce or associate with respiratory toxicities and whether such characteristics are inherently related to their antitumor effect or are collateral. Once such mechanisms have been identified and/or fully characterized, they may be able to guide disease-management decisions including effective intervention strategies for the adverse effects. In the meantime, radiation oncologists should be judicious on the dose of radiation delivered to the lungs, the volume of lung irradiated, and concurrent use of chemotherapeutic drugs.
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Affiliation(s)
- Li Li
- Department of Radiation Oncology, Baylor College of Medicine, Houston, Texas, USA
- Departmet of Endocrinology, Xinqiao Hospital, Third Military Medical University, Chongqing, China
| | - Henry Mok
- Department of Radiation Oncology, Baylor College of Medicine, Houston, Texas, USA
| | - Pavan Jhaveri
- Department of Radiation Oncology, Baylor College of Medicine, Houston, Texas, USA
| | - Mark D Bonnen
- Department of Radiation Oncology, Baylor College of Medicine, Houston, Texas, USA
| | - Andrew G Sikora
- Department of Otolaryngology - Head and Neck Surgery, Baylor College of Medicine, Houston, Texas, USA
| | - N. Tony Eissa
- Department of Medicine, Section on Pulmonary and Critical Care Medicine, Baylor College of Medicine, Houston, Texas, USA
| | - Ritsuko U Komaki
- University of Texas, MD Anderson Cancer Center, Houston, Texas, USA
| | - Yohannes T Ghebre
- Department of Radiation Oncology, Baylor College of Medicine, Houston, Texas, USA
- Department of Medicine, Section on Pulmonary and Critical Care Medicine, Baylor College of Medicine, Houston, Texas, USA
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Han X, Wu YC, Meng M, Sun QS, Gao SM, Sun H. Linarin prevents LPS‑induced acute lung injury by suppressing oxidative stress and inflammation via inhibition of TXNIP/NLRP3 and NF‑κB pathways. Int J Mol Med 2018; 42:1460-1472. [PMID: 29845284 PMCID: PMC6089707 DOI: 10.3892/ijmm.2018.3710] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2017] [Accepted: 05/09/2018] [Indexed: 11/16/2022] Open
Abstract
Acute lung injury (ALI) is an important cause of morbidity and mortality for critically ill patients, and linarin (LR) may be a potential treatment for ALI as it reportedly has antioxidant, anti-inflammatory and apoptotic-regulating activity. In the present study, the authors report that saline and LR (12.5, 25 and 50 mg/kg) were applied to male C57BL/6 mice via gavage. Then, mice were intratracheally injected with either saline or lipopolysaccharide (LPS). LR-pretreatment attenuated LPS-induced ALI and platelet activation and reduced CD41 expression levels and neutrophil platelet aggregates. Additionally, LPS-triggered pulmonary myeloperoxidase activity and neutrophil infiltration in lung tissues, and this was eliminated by LR dose-dependently. Furthermore, LPS-induced oxidative stress and pro-inflammatory cytokine release were downregulated by LR by inhibiting thioredoxin-interacting protein and nuclear factor-κB signaling pathways, including their downstream and upstream signals, such as xanthine oxidase, NLR family WHAT, pyrin domain-containing 3 (NLRP3), apoptosis-associated speck-like protein containing a C-terminal caspase recruitment domain (ASC), caspase-1, IκB kinase-α (IKK-α) and IκBα. Moreover, in LPS-induced mice, the mitogen-activated protein kinase pathway was inactivated by LR. In vitro, LR reduced LPS-induced inflammation and oxidative stress, which was linked to reduction of ROS. In conclusion, LR pretreatment may be protective against LPS-induced ALI.
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Affiliation(s)
- Xiang Han
- Department of Emergency, The Affiliated Huaian No. 1 People's Hospital of Nanjing Medical University, Huai'an, Jiangsu 223300, P.R. China
| | - Yi-Chen Wu
- Department of Emergency, The Affiliated Huaian No. 1 People's Hospital of Nanjing Medical University, Huai'an, Jiangsu 223300, P.R. China
| | - Min Meng
- Department of Emergency, The Affiliated Huaian No. 1 People's Hospital of Nanjing Medical University, Huai'an, Jiangsu 223300, P.R. China
| | - Qing-Song Sun
- Department of Emergency, The Affiliated Huaian No. 1 People's Hospital of Nanjing Medical University, Huai'an, Jiangsu 223300, P.R. China
| | - Su-Min Gao
- Department of Emergency, The Affiliated Huaian No. 1 People's Hospital of Nanjing Medical University, Huai'an, Jiangsu 223300, P.R. China
| | - Hong Sun
- Department of Emergency, The Affiliated Huaian No. 1 People's Hospital of Nanjing Medical University, Huai'an, Jiangsu 223300, P.R. China
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Lee DK, Kim JH, Kim J, Choi S, Park M, Park W, Kim S, Lee KS, Kim T, Jung J, Choi YK, Ha KS, Won MH, Billiar TR, Kwon YG, Kim YM. REDD-1 aggravates endotoxin-induced inflammation via atypical NF-κB activation. FASEB J 2018; 32:4585-4599. [PMID: 29547704 DOI: 10.1096/fj.201701436r] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Regulated in development and DNA damage responses 1 (REDD-1), an inhibitor of mammalian target of rapamycin (mTOR), is induced by various cell stressors, including LPS, a major player in the pathogenesis of endotoxemic shock. However, the pathologic role of REDD-1 in endotoxemia is largely unknown. We found that LPS increased REDD-1 expression, nuclear transcription factor-κB (NF-κB) activation, and inflammation and that these responses were suppressed by REDD-1 knockdown and in REDD-1+/- macrophages. REDD-1 overexpression stimulated NF-κB-dependent inflammation without additional LPS stimulation. REDD-1-induced NF-κB activation was independent of 2 classic IKK-dependent NF-κB pathways and the mTOR signaling pathway; however, REDD-1, particularly its C-terminal region (178-229), interacted with and sequestered IκBα, to elicit atypical NF-κB activation during the delayed and persistent phases of inflammation after stimulation. Moreover, REDD-1 knockdown mitigated vascular inflammation and permeability in endotoxemic mice, resulting in decreases in immune cell infiltration, systemic inflammation, caspase-3 activation, apoptosis, and consequent mortality. We further confirmed the inflammatory and cytotoxic effects of REDD-1 in endotoxemic REDD-1+/- mice. Our data support the likelihood that REDD-1 exacerbates endotoxemic inflammation via atypical NF-κB activation by sequestering IκBα.-Lee, D.-K., Kim, J.-H., Kim, J., Choi, S., Park, M., Park, W., Kim, S., Lee, K.-S., Kim, T., Jung, J., Choi, Y. K., Ha, K.-S., Won, M.-H., Billiar, T. R., Kwon, Y.-G., Kim, Y.-M. REDD-1 aggravates endotoxin-induced inflammation via atypical NF-κB activation.
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Affiliation(s)
- Dong-Keon Lee
- Department of Molecular and Cellular Biochemistry, School of Medicine, Kangwon National University, Chuncheon, South Korea
| | - Ji-Hee Kim
- Department of Molecular and Cellular Biochemistry, School of Medicine, Kangwon National University, Chuncheon, South Korea
| | - Joohwan Kim
- Department of Molecular and Cellular Biochemistry, School of Medicine, Kangwon National University, Chuncheon, South Korea
| | - Seunghwan Choi
- Department of Molecular and Cellular Biochemistry, School of Medicine, Kangwon National University, Chuncheon, South Korea
| | - MinSik Park
- Department of Molecular and Cellular Biochemistry, School of Medicine, Kangwon National University, Chuncheon, South Korea
| | - Wonjin Park
- Department of Molecular and Cellular Biochemistry, School of Medicine, Kangwon National University, Chuncheon, South Korea
| | - Suji Kim
- Department of Molecular and Cellular Biochemistry, School of Medicine, Kangwon National University, Chuncheon, South Korea
| | - Kyu-Sun Lee
- Department of Molecular and Cellular Biochemistry, School of Medicine, Kangwon National University, Chuncheon, South Korea
| | - Taesam Kim
- Department of Molecular and Cellular Biochemistry, School of Medicine, Kangwon National University, Chuncheon, South Korea
| | - Jiwon Jung
- Department of Molecular and Cellular Biochemistry, School of Medicine, Kangwon National University, Chuncheon, South Korea
| | - Yoon Kyung Choi
- Department of Integrative Bioscience and Biotechnology, Konkuk University, Seoul, South Korea
| | - Kwon-Soo Ha
- Department of Molecular and Cellular Biochemistry, School of Medicine, Kangwon National University, Chuncheon, South Korea
| | - Moo-Ho Won
- Department of Neurobiology, School of Medicine, Kangwon National University, Chuncheon, South Korea
| | - Timothy R Billiar
- Department of Surgery, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania, USA
| | - Young-Guen Kwon
- Department of Biochemistry, College of Life Science and Biotechnology, Yonsei University, Seoul, South Korea
| | - Young-Myeong Kim
- Department of Molecular and Cellular Biochemistry, School of Medicine, Kangwon National University, Chuncheon, South Korea
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Alvarez RH, Bechara RI, Naughton MJ, Adachi JA, Reuben JM. Emerging Perspectives on mTOR Inhibitor-Associated Pneumonitis in Breast Cancer. Oncologist 2018; 23:660-669. [PMID: 29487226 DOI: 10.1634/theoncologist.2017-0343] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2017] [Accepted: 01/03/2018] [Indexed: 01/14/2023] Open
Abstract
Substantial improvements in the early detection and treatment of breast cancer have led to improvements in survival, but breast cancer remains a significant cause of morbidity and mortality in women. In 2012, the mammalian target of rapamycin (mTOR) inhibitor everolimus was approved by the U.S. Food and Drug Administration for the treatment of advanced breast cancer in patients resistant to endocrine therapy. Although everolimus is generally well tolerated, mTOR inhibitor-associated pneumonitis is one of the most common adverse drug events leading to treatment discontinuation. To date, the underlying pathophysiology of this toxicity is unclear, and this uncertainty may hinder the optimization of management strategies. However, experiences from breast cancer and renal cell carcinoma clinical trials indicate that mTOR inhibitor-associated pneumonitis can be effectively managed by early detection, accurate diagnosis, and prompt intervention that generally involves everolimus dose reductions, interruptions, or discontinuation. Management can be achieved by a multidisciplinary approach that involves the collaborative efforts of nurses, oncologists, radiologists, infectious disease specialists, pulmonologists, clinical pharmacists, and pathologists. Comprehensive education must be provided to all health care professionals involved in managing patients receiving everolimus therapy. Although general recommendations on the management of mTOR inhibitor-associated pneumonitis have been published, there is a lack of consensus on the optimal management of this potentially serious complication. This article provides an overview of mTOR inhibitor-associated pneumonitis, with a focus on the detection, accurate diagnosis, and optimal management of this class-related complication of mTOR inhibitor therapy. IMPLICATIONS FOR PRACTICE This article summarizes the pathogenesis, clinical presentation, incidence, detection, and optimal management of everolimus-related noninfectious pneumonitis in breast cancer. In particular, this article provides a detailed overview of the important aspects of the detection, accurate diagnosis, and appropriate management of mammalian target of rapamycin inhibitor-associated pneumonitis. In addition, this article emphasizes that effective management of this adverse drug event in patients with breast cancer will require a multidisciplinary approach and collaboration among various health care professionals.
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Affiliation(s)
| | | | - Michael J Naughton
- Siteman Cancer Center, Washington University School of Medicine, St. Louis, Missouri, USA
| | - Javier A Adachi
- The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - James M Reuben
- The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
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Leucine alters immunoglobulin a secretion and inflammatory cytokine expression induced by lipopolysaccharide via the nuclear factor-κB pathway in intestine of chicken embryos. Animal 2017; 12:1903-1911. [PMID: 29271330 DOI: 10.1017/s1751731117003342] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
The mammalian target of rapamycin (mTOR) has been shown to be involved in lipopolysaccharide (LPS)-induced immune responses in many mammal cells. Here, we suggest that the mTOR pathway is involved in the intestinal inflammatory responses evoked by LPS treatment in chicken embryos. The intestinal tissue from Specific pathogen free chick embryos was cultured in the presence of LPS for 2 h. Secretory immunoglobulin A (sIgA) concentrations, messenger RNA (mRNA) expression of cytokines, and protein levels of nuclear factor-κB (NF-κB), mitogen-activated protein kinase (MAPK), mTOR and p70 ribosomal S6 kinase (p70S6K) were determined. The results showed that LPS treatment increased sIgA concentrations in a dose-dependent manner. The mRNA levels of interleukine (IL)-6, IL-8, IL-10, tumor necrosis factor-α and Toll-like receptor (TLR) 4 were upregulated by LPS treatment (P<0.05). Lipopolysaccharide increased the phosphorylation of Jun N-terminal kinase (JNK), p38 MAPK and NF-κB (P<0.05) while decreasing the phosphorylation level of mTOR (P<0.05). Supplementation of leucine at doses of 10, 20 and 40 mM dose-dependently decreased sIgA production. Leucine supplementation at 40 mM restored the phosphorylation level of mTOR and p70S6K while suppressing the phosphorylation levels of NF-κB (P<0.05) and partially down-regulating the phosphorylation of p38 MAPK and JNK. The transcription of IL-6 was significantly decreased by leucine supplementation. These results suggested that leucine could alleviate LPS-induced inflammatory responses by down-regulating NF-κB signaling pathway and evoking mTOR/p70S6K signaling pathway, which may involve in the regulation of the intestinal immune system in chicken embryos.
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Li X, Chang B, Wang B, Bu W, Zhao L, Liu J, Meng L, Wang L, Xin Y, Wang D, Tang Q, Zheng C, Sun H. Rapamycin promotes osteogenesis under inflammatory conditions. Mol Med Rep 2017; 16:8923-8929. [PMID: 28990080 PMCID: PMC5779975 DOI: 10.3892/mmr.2017.7693] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2017] [Accepted: 09/19/2017] [Indexed: 12/12/2022] Open
Abstract
Chronic periodontitis, a common oral disease, usually results in irreversible bone resorption. Bone regeneration is a complex process between bone-forming activity of osteoblasts and bone-resorbing activity of osteoclasts, and still remains a challenge for physicians clinically. A previous study demonstrated that the mechanistic target of rapamycin signaling pathway is involved in osteogenic differentiation of mesenchymal stromal cells. Herein, whether rapamycin could be used to induce osteogenic differentiation of primary bone marrow-derived mesenchymal stem cells (BMSCs) in vitro and promote new bone formation in vivo were evaluated. The results demonstrated that rapamycin alone was not enough to fully induce osteoblast differentiation in vitro and enhanced bone regeneration in vivo. Interestingly, rapamycin in rapamycin plus lipopolysaccharide (LPS)-treated BMSCs significantly increased the gene expression levels of Sp7 transcription factor, runt related transcription factor 2, alkaline phosphatase (ALP) and collagen I (Col I), ALP activity, and calcium nodule at different time points in vitro, indicating that osteoblast differentiation occurs by rapamycin when BMSCs are exposed to LPS simultaneously. It was also demonstrated that rapamycin in rapamycin plus LPS-treated rats promoted bone regeneration in vivo. These results suggest that rapamycin may influence osteoblast differentiation and new bone formation after LPS induces an inflammatory environment. Rapamycin may be used to treat periodontitis associated with bone loss in future clinical practice.
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Affiliation(s)
- Xing Li
- Department of Oral Pathology, School and Hospital of Stomatology, Jilin University, Changchun, Jilin 130021, P.R. China
| | - Bei Chang
- Department of Oral Pathology, School and Hospital of Stomatology, Jilin University, Changchun, Jilin 130021, P.R. China
| | - Banchao Wang
- Department of Oral Pathology, School and Hospital of Stomatology, Jilin University, Changchun, Jilin 130021, P.R. China
| | - Wenhuan Bu
- Department of Oral Pathology, School and Hospital of Stomatology, Jilin University, Changchun, Jilin 130021, P.R. China
| | - Liang Zhao
- Department of Oral Pathology, School and Hospital of Stomatology, Jilin University, Changchun, Jilin 130021, P.R. China
| | - Jie Liu
- Department of Oral Pathology, School and Hospital of Stomatology, Jilin University, Changchun, Jilin 130021, P.R. China
| | - Lin Meng
- Department of Oral Pathology, School and Hospital of Stomatology, Jilin University, Changchun, Jilin 130021, P.R. China
| | - Lu Wang
- Department of Oral Pathology, School and Hospital of Stomatology, Jilin University, Changchun, Jilin 130021, P.R. China
| | - Ying Xin
- Department of Oral Pathology, School and Hospital of Stomatology, Jilin University, Changchun, Jilin 130021, P.R. China
| | - Dandan Wang
- Department of Oral Pathology, School and Hospital of Stomatology, Jilin University, Changchun, Jilin 130021, P.R. China
| | - Qi Tang
- Department of Oral Pathology, School and Hospital of Stomatology, Jilin University, Changchun, Jilin 130021, P.R. China
| | - Changyu Zheng
- Molecular Physiology and Therapeutics Branch, National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, MD 20892, USA
| | - Hongchen Sun
- Department of Oral Pathology, School and Hospital of Stomatology, Jilin University, Changchun, Jilin 130021, P.R. China
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Sachdev U, Lotze MT. Perpetual change: autophagy, the endothelium, and response to vascular injury. J Leukoc Biol 2017; 102:221-235. [PMID: 28626046 PMCID: PMC6608075 DOI: 10.1189/jlb.3ru1116-484rr] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2016] [Revised: 05/05/2017] [Accepted: 05/08/2017] [Indexed: 12/15/2022] Open
Abstract
Current studies of vascular health, aging, and autophagy emphasize how the endothelium adapts to stress and contributes to disease. The endothelium is far from an inert barrier to blood-borne cells, pathogens, and chemical signals; rather, it actively translates circulating mediators into tissue responses, changing rapidly in response to physiologic stressors. Macroautophagy-the cellular ingestion of effete organelles and protein aggregates to provide anabolic substrates to fuel bioenergetics in times of stress-plays an important role in endothelial cell homeostasis, vascular remodeling, and disease. These roles include regulating vascular tone, sustaining or limiting cell survival, and contributing to the development of atherosclerosis secondary to infection, inflammation, and angiogenesis. Autophagy modulates these critical functions of the endothelium in a dynamic and perpetual response to tissue and intravascular cues.
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Affiliation(s)
- Ulka Sachdev
- Department of Surgery, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania, USA
| | - Michael T Lotze
- Department of Surgery, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania, USA
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41
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Li L, Zhu C, Yuan Y, Li Z. Effect of rapamycin on early stage apoptosis of neutrophils in Sprague-Dawley rats with acute lung injury. Biomed Rep 2017; 7:148-152. [DOI: 10.3892/br.2017.936] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2016] [Accepted: 06/09/2017] [Indexed: 11/05/2022] Open
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Sureshbabu A, Syed M, Das P, Janér C, Pryhuber G, Rahman A, Andersson S, Homer RJ, Bhandari V. Inhibition of Regulatory-Associated Protein of Mechanistic Target of Rapamycin Prevents Hyperoxia-Induced Lung Injury by Enhancing Autophagy and Reducing Apoptosis in Neonatal Mice. Am J Respir Cell Mol Biol 2017; 55:722-735. [PMID: 27374190 DOI: 10.1165/rcmb.2015-0349oc] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Administration of supplemental oxygen remains a critical clinical intervention for survival of preterm infants with respiratory failure. However, prolonged exposure to hyperoxia can augment pulmonary damage, resulting in developmental lung diseases embodied as hyperoxia-induced acute lung injury and bronchopulmonary dysplasia (BPD). We sought to investigate the role of autophagy in hyperoxia-induced apoptotic cell death in developing lungs. We identified increased autophagy signaling in hyperoxia-exposed mouse lung epithelial-12 cells, freshly isolated fetal type II alveolar epithelial cells, lungs of newborn wild-type mice, and human newborns with respiratory distress syndrome and evolving and established BPD. We found that hyperoxia exposure induces autophagy in a Trp53-dependent manner in mouse lung epithelial-12 cells and in neonatal mouse lungs. Using pharmacological inhibitors and gene silencing techniques, we found that the activation of autophagy, upon hyperoxia exposure, demonstrated a protective role with an antiapoptotic response. Specifically, inhibiting regulatory-associated protein of mechanistic target of rapamycin (RPTOR) in hyperoxia settings, as evidenced by wild-type mice treated with torin2 or mice administered (Rptor) silencing RNA via intranasal delivery or Rptor+/-, limited lung injury by increased autophagy, decreased apoptosis, improved lung architecture, and increased survival. Furthermore, we identified increased protein expression of phospho-beclin1, light chain-3-II and lysosomal-associated membrane protein 1, suggesting altered autophagic flux in the lungs of human neonates with established BPD. Collectively, our study unveils a novel demonstration of enhancing autophagy and antiapoptotic effects, specifically through the inhibition of RPTOR as a potentially useful therapeutic target for the treatment of hyperoxia-induced acute lung injury and BPD in developing lungs.
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Affiliation(s)
- Angara Sureshbabu
- 1 Division of Perinatal Medicine, Department of Pediatrics, Yale University School of Medicine, New Haven, Connecticut
| | - Mansoor Syed
- 1 Division of Perinatal Medicine, Department of Pediatrics, Yale University School of Medicine, New Haven, Connecticut.,2 Section of Neonatal-Perinatal Medicine, Department of Pediatrics, Drexel University College of Medicine, Philadelphia, Pennsylvania
| | - Pragnya Das
- 2 Section of Neonatal-Perinatal Medicine, Department of Pediatrics, Drexel University College of Medicine, Philadelphia, Pennsylvania
| | - Cecilia Janér
- 3 Children's Hospital, University of Helsinki, Helsinki, Finland
| | - Gloria Pryhuber
- 4 Department of Pediatrics, University of Rochester School of Medicine and Dentistry, Rochester, New York; and
| | - Arshad Rahman
- 4 Department of Pediatrics, University of Rochester School of Medicine and Dentistry, Rochester, New York; and
| | - Sture Andersson
- 3 Children's Hospital, University of Helsinki, Helsinki, Finland
| | - Robert J Homer
- 5 Department of Pathology, Yale University School of Medicine, New Haven, Connecticut
| | - Vineet Bhandari
- 1 Division of Perinatal Medicine, Department of Pediatrics, Yale University School of Medicine, New Haven, Connecticut.,2 Section of Neonatal-Perinatal Medicine, Department of Pediatrics, Drexel University College of Medicine, Philadelphia, Pennsylvania
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43
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Liu YC, Gao XX, Chen L, You XQ. Rapamycin suppresses Aβ 25-35- or LPS-induced neuronal inflammation via modulation of NF-κB signaling. Neuroscience 2017; 355:188-199. [PMID: 28504198 DOI: 10.1016/j.neuroscience.2017.05.005] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2016] [Revised: 04/25/2017] [Accepted: 05/03/2017] [Indexed: 01/10/2023]
Abstract
Rapamycin (RAPA), an inhibitor of mammalian target of rapamycin (mTOR), exhibits a high neuroprotective action against neurodegenerative diseases in mouse models. Since neuroinflammation has been shown to be involved in Alzheimer's disease (AD) development and progression, the aim of this study was to examine the anti-inflammatory role of RAPA in AD in vivo and in vitro, and investigate the underlying mechanisms. We found that amyloid-β (Aβ) induced neuronal inflammation and a remarkable increase in mTOR activity in in-vivo and in-vitro models of inflammation, suggesting the critical role of mTOR signaling in neuronal inflammation. In addition, administration of RAPA was found to down-regulate mTOR, p-mTOR, Nuclear factor kappa B (NF-κB) p65, p-p65, TNF-α, IL-1β and Bax protein expression in Aβ25-35- or lipopolysaccharides (LPS)-treated mice and cultured Neuro-2a (N2a) cells. Moreover, RAPA disrupted Aβ25-35-induced nuclear translocation of mTOR and NF-κB. Our findings indicate that RAPA inhibits Aβ25-35- or LPS-induced neuronal inflammation through suppressing mTOR signaling and reducing nuclear import of NF-κB.
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Affiliation(s)
- Ying-Chun Liu
- Department of Cell Biology and Genetics, School of Basic Medical Sciences, Fujian Medical University, No. 1 Xueyuan Road, Shangjie Town, Minhou County, Fuzhou City, Fujian Province 350108, China
| | - Xiao-Xiao Gao
- Department of Cell Biology and Genetics, School of Basic Medical Sciences, Fujian Medical University, No. 1 Xueyuan Road, Shangjie Town, Minhou County, Fuzhou City, Fujian Province 350108, China
| | - Ling Chen
- Department of Cell Biology and Genetics, School of Basic Medical Sciences, Fujian Medical University, No. 1 Xueyuan Road, Shangjie Town, Minhou County, Fuzhou City, Fujian Province 350108, China
| | - Xiao-Qing You
- Department of Cell Biology and Genetics, School of Basic Medical Sciences, Fujian Medical University, No. 1 Xueyuan Road, Shangjie Town, Minhou County, Fuzhou City, Fujian Province 350108, China.
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45
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Temiz-Resitoglu M, Kucukkavruk SP, Guden DS, Cecen P, Sari AN, Tunctan B, Gorur A, Tamer-Gumus L, Buharalioglu CK, Malik KU, Sahan-Firat S. Activation of mTOR/IκB-α/NF-κB pathway contributes to LPS-induced hypotension and inflammation in rats. Eur J Pharmacol 2017; 802:7-19. [PMID: 28228357 DOI: 10.1016/j.ejphar.2017.02.034] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2017] [Revised: 02/13/2017] [Accepted: 02/17/2017] [Indexed: 01/22/2023]
Abstract
Mammalian target of rapamycin (mTOR), a serine/threonine kinase plays an important role in various pathophysiological processes including cancer, metabolic diseases, and inflammation. Although mTOR participates in Toll-like receptor 4 signalling in different cell types, the role of this enzyme in sepsis pathogenesis and its effects on hypotension and inflammation in endotoxemic rats remains unclear. In this study we investigated the effects of mTOR inhibition on lipopolysaccharide (LPS)-induced changes on expressions and/or activities of ribosomal protein S6 (rpS6), an mTOR substrate, nuclear factor-κB (NF-κB) p65, inhibitor κB (IκB)-α, inducible nitric oxide synthase (iNOS), cyclooxygenase (COX)-2 with production of nitric oxide, peroxynitrite, prostacyclin, and tumor necrosis factor (TNF)-α and activity of myeloperoxidase (MPO), which results in hypotension and inflammation. Injection of LPS (10mg/kg, i.p.) to male Wistar rats decreased blood pressure and increased heart rate that were associated with elevated nitrotyrosine, 6-keto-PGF1α, and TNF-α levels and MPO activity, and increased expressions and/or activities of rpS6, NF-κB p65, iNOS, and COX-2 and decreased expression of IκB-α in renal, cardiac, and vascular tissues. LPS also increased serum and tissue nitrite levels. Rapamycin (1mg/kg, i.p.) given one h after injection of LPS reversed these effects of LPS. These data suggest that the activation of mTOR/IκB-α/NF-κB pathway associated with vasodilator and proinflammatory mediator formation contributes to LPS-induced hypotension and inflammation.
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Affiliation(s)
| | | | - Demet Sinem Guden
- Department of Pharmacology, Faculty of Pharmacy, Mersin University, Mersin, Turkey
| | - Pelin Cecen
- Department of Pharmacology, Faculty of Pharmacy, Mersin University, Mersin, Turkey
| | - Ayse Nihal Sari
- Department of Pharmacology, Faculty of Pharmacy, Mersin University, Mersin, Turkey
| | - Bahar Tunctan
- Department of Pharmacology, Faculty of Pharmacy, Mersin University, Mersin, Turkey
| | - Aysegul Gorur
- Department of Biochemistry, Faculty of Medicine, Mersin University, Mersin, Turkey
| | - Lulufer Tamer-Gumus
- Department of Biochemistry, Faculty of Medicine, Mersin University, Mersin, Turkey
| | | | - Kafait U Malik
- Department of Pharmacology, College of Medicine, University of Tennessee, Center for Health Sciences, Memphis, TN, USA
| | - Seyhan Sahan-Firat
- Department of Pharmacology, Faculty of Pharmacy, Mersin University, Mersin, Turkey.
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46
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Lin WC, Deng JS, Huang SS, Lin WR, Wu SH, Lin HY, Huang GJ. Anti-inflammatory activity of Sanghuangporus sanghuang by suppressing the TLR4-mediated PI3K/AKT/mTOR/IKKβ signaling pathway. RSC Adv 2017. [DOI: 10.1039/c7ra01000a] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Sanghuangporus sanghuang (SS) is a mushroom that belongs to the genus Sanghuangporus and it is commonly called “Sangwhang” in Taiwan.
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Affiliation(s)
- Wang-Ching Lin
- School of Pharmacy
- China Medical University
- Taichung 404
- Taiwan
| | - Jeng-Shyan Deng
- Department of Health and Nutrition Biotechnology
- Asia University
- Taichung 413
- Taiwan
| | | | - Wan-Rong Lin
- School of Chinese Pharmaceutical Sciences and Chinese Medicine Resources
- College of Chinese Medicine
- China Medical University
- Taichung 404
- Taiwan
| | - Sheng-Hua Wu
- Department of Biology
- National Museum of Natural Science
- Taichung 404
- Taiwan
| | - Hui-Yi Lin
- School of Pharmacy
- China Medical University
- Taichung 404
- Taiwan
| | - Guan-Jhong Huang
- School of Chinese Pharmaceutical Sciences and Chinese Medicine Resources
- College of Chinese Medicine
- China Medical University
- Taichung 404
- Taiwan
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47
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Codère-Maruyama T, Schricker T, Shum-Tim D, Wykes L, Nitschmann E, Guichon C, Kristof AS, Hatzakorzian R. Hyperinsulinemic-normoglycemic clamp administered together with amino acids induces anabolism after cardiac surgery. Am J Physiol Regul Integr Comp Physiol 2016; 311:R1085-R1092. [PMID: 27707724 DOI: 10.1152/ajpregu.00334.2016] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2016] [Revised: 09/20/2016] [Accepted: 10/04/2016] [Indexed: 01/01/2023]
Abstract
Cardiac surgery triggers an inflammatory stress response, leading to protein catabolism, a process that even high-dose insulin therapy alone cannot reverse. To determine whether hyperinsulinemic-normoglycemic clamp and perioperative amino acid (AA) supplementation improves whole body protein balance, 20 patients scheduled for elective coronary artery bypass grafting surgery were randomly assigned to have intra- and postoperative hyperinsulinemic-normoglycemic clamp, with or without intravenous AA supplementation. Primed continuous infusions of [6,6-2H2]glucose and l-[1-13C]leucine were used to quantify whole body protein and glucose metabolism before and after surgery. Adipose tissue and serum cytokines were also analyzed to measure their responsiveness to the anabolic effect of AA administration. During hyperinsulinemic-normoglycemic clamp, AA supplementation successfully stimulated whole body protein synthesis, resulting in a positive whole body protein balance after surgery (insulin: -13.6 ± 4.5 vs. insulin + AA: 2.1 ± 5.4 μmol·kg-1·h-1, P < 0.001). Endogenous glucose production was equally suppressed in both groups (insulin: 0.0 ± 3.8 vs. insulin + AA 1.6 ± 1.6 μmol·kg-1·min-1, P = 0.230). AA supplementation led to significant changes in serum and tissue IL-6 (insulin: 246.6 ± 111.2 vs. insulin + AA: 124.5 ± 79.3 pg/ml, P = 0.011). In conclusion, hyperinsulinemic-normoglycemic clamp technique, together with AA supplementation, can induce an anabolic state after open-heart surgery, as quantified by a positive whole body protein balance.
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Affiliation(s)
| | - Thomas Schricker
- Department of Anesthesia, McGill University, Montreal, Quebec, Canada
| | - Dominique Shum-Tim
- Department of Cardiovascular Surgery, McGill University, Montreal, Quebec, Canada
| | - Linda Wykes
- School of Dietetics and Human Nutrition, McGill University, Montreal, Quebec, Canada; and
| | - Evan Nitschmann
- School of Dietetics and Human Nutrition, McGill University, Montreal, Quebec, Canada; and
| | - Céline Guichon
- Departments of Critical Care and Medicine (Respiratory Division), McGill University Health Centre and Meakins-Christie Laboratories, McGill University, Montreal, Quebec, Canada
| | - Arnold S Kristof
- Departments of Critical Care and Medicine (Respiratory Division), McGill University Health Centre and Meakins-Christie Laboratories, McGill University, Montreal, Quebec, Canada
| | - Roupen Hatzakorzian
- Department of Anesthesia, McGill University, Montreal, Quebec, Canada.,Departments of Critical Care and Medicine (Respiratory Division), McGill University Health Centre and Meakins-Christie Laboratories, McGill University, Montreal, Quebec, Canada
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48
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A Potential Mechanism for the Anti-Apoptotic Property of Koumine Involving Mitochondrial Pathway in LPS-Mediated RAW 264.7 Macrophages. Molecules 2016; 21:molecules21101317. [PMID: 27706063 PMCID: PMC6273091 DOI: 10.3390/molecules21101317] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2016] [Revised: 09/19/2016] [Accepted: 09/21/2016] [Indexed: 11/17/2022] Open
Abstract
Koumine is a kind of alkaloid extracted from Gelsemium elegans (G. elegans). Benth, which has shown promise as an anti-tumor, anxiolytic, and analgesic agent. In our present study, the effect of koumine on lipopolysaccharide (LPS)-mediated RAW 264.7 cell apoptosis was evaluated. MTT assays showed that koumine obviously increased cell viability in LPS-mediated RAW 264.7 macrophages. Preincubation with koumine ameliorated LPS-medicated apoptosis by decreasing reactive oxygen species (ROS) production, which resulted in a significant decrease in the levels of nitric oxide (NO) and inducible nitric oxide synthase (iNOS). In addition, koumine-pretreated RAW 264.7 macrophages exhibited reduction of LPS-induced levels of TNF-α, IL-1β, and IL-6 mRNA. Furthermore, pretreatment with koumine suppressed LPS-mediated p53 activation, loss of mitochondrial membrane potential, caspase-3 activation, decrease of Bcl-2 expression, and elevation of Bax and caspase-3 expressions, suggesting that koumine might act directly on RAW 264.7 cells to inhibit LPS-induced apoptosis. It seems as though the mechanism that koumine possesses is the anti-apoptotic effect mediated by suppressing production of ROS, activation of p53, and mitochondrial apoptotic pathways in RAW 264 cells. Koumine could potentially serve as a protective effect against LPS-induced apoptosis.
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49
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Hu Y, Lou J, Mao YY, Lai TW, Liu LY, Zhu C, Zhang C, Liu J, Li YY, Zhang F, Li W, Ying SM, Chen ZH, Shen HH. Activation of MTOR in pulmonary epithelium promotes LPS-induced acute lung injury. Autophagy 2016; 12:2286-2299. [PMID: 27658023 DOI: 10.1080/15548627.2016.1230584] [Citation(s) in RCA: 143] [Impact Index Per Article: 17.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
MTOR (mechanistic target of rapamycin [serine/threonine kinase]) plays a crucial role in many major cellular processes including metabolism, proliferation and macroautophagy/autophagy induction, and is also implicated in a growing number of proliferative and metabolic diseases. Both MTOR and autophagy have been suggested to be involved in lung disorders, however, little is known about the role of MTOR and autophagy in pulmonary epithelium in the context of acute lung injury (ALI). In the present study, we observed that lipopolysaccharide (LPS) stimulation induced MTOR phosphorylation and decreased the expression of MAP1LC3B/LC3B (microtubule-associated protein 1 light chain 3 β)-II, a hallmark of autophagy, in mouse lung epithelium and in human bronchial epithelial (HBE) cells. The activation of MTOR in HBE cells was mediated by TLR4 (toll-like receptor 4) signaling. Genetic knockdown of MTOR or overexpression of autophagy-related proteins significantly attenuated, whereas inhibition of autophagy further augmented, LPS-induced expression of IL6 (interleukin 6) and IL8, through NFKB signaling in HBE cells. Mice with specific knockdown of Mtor in bronchial or alveolar epithelial cells exhibited significantly attenuated airway inflammation, barrier disruption, and lung edema, and displayed prolonged survival in response to LPS exposure. Taken together, our results demonstrate that activation of MTOR in the epithelium promotes LPS-induced ALI, likely through downregulation of autophagy and the subsequent activation of NFKB. Thus, inhibition of MTOR in pulmonary epithelial cells may represent a novel therapeutic strategy for preventing ALI induced by certain bacteria.
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Affiliation(s)
- Yue Hu
- a Department of Respiratory and Critical Care Medicine , Second Affiliated Hospital of Zhejiang University School of Medicine , Hangzhou , China
| | - Jian Lou
- a Department of Respiratory and Critical Care Medicine , Second Affiliated Hospital of Zhejiang University School of Medicine , Hangzhou , China
| | - Yuan-Yuan Mao
- a Department of Respiratory and Critical Care Medicine , Second Affiliated Hospital of Zhejiang University School of Medicine , Hangzhou , China
| | - Tian-Wen Lai
- a Department of Respiratory and Critical Care Medicine , Second Affiliated Hospital of Zhejiang University School of Medicine , Hangzhou , China
| | - Li-Yao Liu
- a Department of Respiratory and Critical Care Medicine , Second Affiliated Hospital of Zhejiang University School of Medicine , Hangzhou , China
| | - Chen Zhu
- a Department of Respiratory and Critical Care Medicine , Second Affiliated Hospital of Zhejiang University School of Medicine , Hangzhou , China
| | - Chao Zhang
- a Department of Respiratory and Critical Care Medicine , Second Affiliated Hospital of Zhejiang University School of Medicine , Hangzhou , China
| | - Juan Liu
- a Department of Respiratory and Critical Care Medicine , Second Affiliated Hospital of Zhejiang University School of Medicine , Hangzhou , China
| | - Yu-Yan Li
- a Department of Respiratory and Critical Care Medicine , Second Affiliated Hospital of Zhejiang University School of Medicine , Hangzhou , China
| | - Fan Zhang
- a Department of Respiratory and Critical Care Medicine , Second Affiliated Hospital of Zhejiang University School of Medicine , Hangzhou , China
| | - Wen Li
- a Department of Respiratory and Critical Care Medicine , Second Affiliated Hospital of Zhejiang University School of Medicine , Hangzhou , China
| | - Song-Min Ying
- a Department of Respiratory and Critical Care Medicine , Second Affiliated Hospital of Zhejiang University School of Medicine , Hangzhou , China
| | - Zhi-Hua Chen
- a Department of Respiratory and Critical Care Medicine , Second Affiliated Hospital of Zhejiang University School of Medicine , Hangzhou , China
| | - Hua-Hao Shen
- a Department of Respiratory and Critical Care Medicine , Second Affiliated Hospital of Zhejiang University School of Medicine , Hangzhou , China.,b State Key Lab of Respiratory Diseases , Guangzhou , China
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50
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Inhibition of EphA2/EphrinA1 signal attenuates lipopolysaccharide-induced lung injury. Clin Sci (Lond) 2016; 130:1993-2003. [PMID: 27549114 DOI: 10.1042/cs20160360] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2015] [Accepted: 08/22/2016] [Indexed: 01/30/2023]
Abstract
Eph-Ephrin signalling mediates various cellular processes, including vasculogenesis, angiogenesis, cell migration, axon guidance, fluid homoeostasis and repair after injury. Although previous studies have demonstrated that stimulation of the EphA receptor induces increased vascular permeability and inflammatory response in lung injury, the detailed mechanisms of EphA2 signalling are unknown. In the present study, we evaluated the role of EphA2 signalling in mice with lipopolysaccharide (LPS)-induced lung injury. Acute LPS exposure significantly up-regulated EphA2 and EphrinA1 expression. Compared with LPS+IgG mice (IgG instillation after LPS exposure), LPS+EphA2 mAb mice [EphA2 monoclonal antibody (mAb) instillation posttreatment after LPS exposure] had attenuated lung injury and reduced cell counts and protein concentration of bronchoalveolar lavage fluid (BALF). EphA2 mAb posttreatment down-regulated the expression of phosphoinositide 3-kinases (PI3K) 110γ, phospho-Akt, phospho-NF-κB p65, phospho-Src and phospho-S6K in lung lysates. In addition, inhibiting the EphA2 receptor augmented the expression of E-cadherin, which is involved in cell-cell adhesion. Our study identified EphA2 receptor as an unrecognized modulator of several signalling pathways-including PI3K-Akt-NF-kB, Src-NF-κB, E-cadherin and mTOR-in LPS-induced lung injury. These results suggest that EphA2 receptor inhibitors may function as novel therapeutic agents for LPS-induced lung injury.
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