1
|
Li XH, Huang P, Cheng HP, Zhou Y, Feng DD, Yue SJ, Han Y, Luo ZQ. NMDAR activation attenuates the protective effect of BM-MSCs on bleomycin-induced ALI via the COX-2/PGE 2 pathway. Heliyon 2024; 10:e23723. [PMID: 38205313 PMCID: PMC10776937 DOI: 10.1016/j.heliyon.2023.e23723] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2023] [Revised: 12/10/2023] [Accepted: 12/12/2023] [Indexed: 01/12/2024] Open
Abstract
N-methyl-d-aspartate (NMDA) receptor (NMDAR) activation mediates glutamate (Glu) toxicity and involves bleomycin (BLM)-induced acute lung injury (ALI). We have reported that bone marrow-derived mesenchymal stem cells (BM-MSCs) are NMDAR-regulated target cells, and NMDAR activation inhibits the protective effect of BM-MSCs on BLM-induced pulmonary fibrosis, but its effect on ALI remains unknown. Here, we found that Glu release was significantly elevated in plasma of mice at d 7 after intratracheally injected with BLM. BM-MSCs were pretreated with NMDA (the selective agonist of NMDAR) and transplanted into the recipient mice after the BLM challenge. BM-MSCs administration significantly alleviated the pathological changes, inflammatory response, myeloperoxidase activity, and malondialdehyde content in the damaged lungs, but NMDA-pretreated BM-MSCs did not ameliorate BLM-induced lung injury in vivo. Moreover, NMDA down-regulated prostaglandin E2 (PGE2) secretion and cyclooxygenase (COX)-2 expression instead of COX-1 expression in BM-MSCs in vitro. We also found that NMDAR1 expression was increased and COX-2 expression was decreased, but COX-1 expression was not changed in primary BM-MSCs of BLM-induced ALI mice. Further, the cultured supernatants of lipopolysaccharide (LPS)-pretreated RAW264.7 macrophages were collected to detect inflammatory factors after co-culture with NMDA-pretreated BM-MSCs. The co-culture experiments showed that NMDA precondition inhibited the anti-inflammatory effect of BM-MSCs on LPS-induced macrophage inflammation, and PGE2 could partially alleviate this inhibition. Our findings suggest that NMDAR activation attenuated the protective effect of BM-MSCs on BLM-induced ALI in vivo. NMDAR activation inhibited COX-2 expression and PGE2 secretion in BM-MSCs and weakened the anti-inflammatory effect of BM-MSCs on LPS-induced macrophage inflammation in vitro. In conclusion, NMDAR activation attenuates the protective effect of BM-MSCs on BLM-induced ALI via the COX-2/PGE2 pathway. Keywords: Acute Lung Injury, BM-MSCs, NMDA receptor, COX-1/2, PGE2.
Collapse
Affiliation(s)
- Xiao-Hong Li
- Department of Pathology, The Second Xiangya Hospital, Central South University, Changsha, 410011, China
- Department of Physiology, Xiangya School of Medicine, Central South University, Changsha, 410078, China
| | - Pu Huang
- Department of Physiology, Xiangya School of Medicine, Central South University, Changsha, 410078, China
- Health Management Center, Changsha Central Hospital Affiliated to Nanhua University, Changsha, 410018, China
| | - Hai-Peng Cheng
- Department of Pathology, The Second Xiangya Hospital, Central South University, Changsha, 410011, China
- Department of Physiology, Xiangya School of Medicine, Central South University, Changsha, 410078, China
| | - Yan Zhou
- Department of Physiology, Xiangya School of Medicine, Central South University, Changsha, 410078, China
| | - Dan-Dan Feng
- Department of Physiology, Xiangya School of Medicine, Central South University, Changsha, 410078, China
| | - Shao-Jie Yue
- Department of Pediatrics, Xiangya Hospital, Central South University, Changsha, 410008, China
| | - Yang Han
- Department of Physiology, Xiangya School of Medicine, Central South University, Changsha, 410078, China
| | - Zi-Qiang Luo
- Department of Physiology, Xiangya School of Medicine, Central South University, Changsha, 410078, China
- Hunan Key Laboratory of Organ Fibrosis, Central South University, Changsha, 410078, China
| |
Collapse
|
2
|
Li XH, Fu JJ, Shi XJ, Zhang YN, Shao M, Yue SJ, Li C, Luo ZQ. Sp1 mediated the inhibitory effect of glutamate on pulmonary surfactant synthesis. PLoS One 2023; 18:e0289530. [PMID: 37556489 PMCID: PMC10411742 DOI: 10.1371/journal.pone.0289530] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2022] [Accepted: 07/20/2023] [Indexed: 08/11/2023] Open
Abstract
BACKGROUND Studies have shown that the release of endogenous glutamate (Glu) participates in lung injury by activating N-methyl-D-aspartate receptor (NMDAR), but the mechanism is still unclear. This study was to investigate the effects and related mechanisms of Glu on the lipid synthesis of pulmonary surfactant (PS) in isolated rat lung tissues. METHODS The cultured lung tissues of adult SD rats were treated with Glu. The amount of [3H]-choline incorporation into phosphatidylcholine (PC) was detected. RT-PCR and Western blot were used to detect the changes of mRNA and protein expression of cytidine triphosphate: phosphocholine cytidylyltransferase alpha (CCTα), a key regulatory enzyme in PC biosynthesis. Western blot was used to detect the expression of NMDAR1, which is a functional subunit of NMDAR. Specific protein 1 (Sp1) expression plasmids were used. After transfected with Sp1 expression plasmids, the mRNA and protein levels of CCTα were detected by RT-PCR and Western blot in A549 cells. After treated with NMDA and MK-801, the mRNA and protein levels of Sp1 were detected by RT-PCR and Western blot in A549 cells. RESULTS Glu decreased the incorporation of [3H]-choline into PC in a concentration- and time- dependent manner. Glu treatment significantly reduced the mRNA and protein levels of CCTα in lungs. Glu treatment up-regulated NMDAR1 protein expression, and the NMDAR blocker MK-801 could partially reverse the reduction of [3H]-choline incorporation induced by Glu (10-4 mol/L) in lungs. After transfected with Sp1 plasmid for 30 h, the mRNA and protein expression levels of CCTα were increased and the protein expression of Sp1 was also up-regulated. After A549 cells were treated with NMDA, the level of Sp1 mRNA did not change significantly, but the expression of nucleus protein in Sp1 was significantly decreased, while the expression of cytoplasmic protein was significantly increased. However, MK-801could reverse these changes. CONCLUSIONS Glu reduced the biosynthesis of the main lipid PC in PS and inhibited CCTα expression by activating NMDAR, which were mediated by the inhibition of the nuclear translocation of Sp1 and the promoter activity of CCTα. In conclusion, NMDAR-mediated Glu toxicity leading to impaired PS synthesis may be a potential pathogenesis of lung injury.
Collapse
Affiliation(s)
- Xiao-Hong Li
- Department of Pathology, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Jie-Jun Fu
- Department of Physiology, Xiangya School of Medicine, Central South University, Changsha, Hunan, China
| | - Xiao-Juan Shi
- Department of Physiology, Xiangya School of Medicine, Central South University, Changsha, Hunan, China
| | - Yun-Na Zhang
- Department of Physiology, Xiangya School of Medicine, Central South University, Changsha, Hunan, China
| | - Min Shao
- Department of Physiology, Xiangya School of Medicine, Central South University, Changsha, Hunan, China
| | - Shao-Jie Yue
- Department of Pediatrics, Xiangya Hospital, Central South University, Changsha, China
| | - Chen Li
- Department of Physiology, Xiangya School of Medicine, Central South University, Changsha, Hunan, China
- Department of Physiology, Changzhi Medical College, Changzhi, Shanxi, China
| | - Zi-Qiang Luo
- Department of Physiology, Xiangya School of Medicine, Central South University, Changsha, Hunan, China
- Hunan Key Laboratory of Organ Fibrosis, Central South University, Changsha, Hunan, China
| |
Collapse
|
3
|
Schorer R, Dombret AL, Hagerman A, Bédat B, Putzu A. Impact of pharmacological interventions on intrapulmonary shunt during one-lung ventilation in adult thoracic surgery: a systematic review and component network meta-analysis. Br J Anaesth 2023; 130:e92-e105. [PMID: 36939497 DOI: 10.1016/j.bja.2022.08.039] [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: 05/24/2022] [Revised: 08/05/2022] [Accepted: 08/24/2022] [Indexed: 11/25/2022] Open
Abstract
BACKGROUND Intrapulmonary shunt is a major determinant of oxygenation in thoracic surgery under one-lung ventilation. We reviewed the effects of available treatments on shunt, Pao2/FiO2 and haemodynamics through systematic review and network meta-analysis. METHODS Online databases were searched for RCTs comparing pharmacological interventions and intrapulmonary shunt in thoracic surgery under one-lung ventilation up to March 30, 2022. Random-effects (component) network meta-analysis compared 24 treatments and 19 treatment components. The Confidence in Network Meta-Analysis (CINeMA) framework assessed evidence certainty. The primary outcome was intrapulmonary shunt fraction during one-lung ventilation. RESULTS A total of 55 RCTs were eligible for systematic review (2788 participants). The addition of N2O (mean difference [MD]=-15%; 95% confidence interval [CI], -25 to -5; P=0.003) or almitrine (MD=-13%; 95% CI, -20 to -6; P<0.001) to propofol anaesthesia were efficient at decreasing shunt. Combined epidural anaesthesia (MD=3%; 95% CI, 1-5; P=0.005), sevoflurane (MD=5%; 95% CI, 2-8; P<0.001), isoflurane (MD=6%; 95% CI, 4-9; P<0.001), and desflurane (MD=9%; 95% CI, 4-14; P=0.001) increased shunt vs propofol. Almitrine (MD=147 mm Hg; 95% CI, 58-236; P=0.001), dopexamine (MD=88 mm Hg; 95% CI, 4-171; P=0.039), and iloprost (MD=81 mm Hg; 95% CI, 4-158; P=0.038) improved Pao2/FiO2. Certainty of evidence ranged from very low to moderate. CONCLUSIONS Adding N2O or almitrine to propofol anaesthesia reduced intrapulmonary shunt during one-lung ventilation. Halogenated anaesthetics increased shunt in comparison with propofol. The effects of N2O, iloprost, and dexmedetomidine should be investigated in future research. N2O results constitute a research hypothesis currently not backed by any direct evidence. The clinical availability of almitrine is limited. SYSTEMATIC REVIEW PROTOCOL PROSPERO CRD42022310313.
Collapse
Affiliation(s)
- Raoul Schorer
- Department of Acute Medicine, Geneva University Hospitals, Geneva, Switzerland.
| | - Anna-Luna Dombret
- Department of Acute Medicine, Geneva University Hospitals, Geneva, Switzerland
| | - Andres Hagerman
- Department of Acute Medicine, Geneva University Hospitals, Geneva, Switzerland
| | - Benoît Bédat
- Division of Thoracic and Endocrine Surgery, Geneva University Hospitals, Geneva, Switzerland
| | - Alessandro Putzu
- Department of Acute Medicine, Geneva University Hospitals, Geneva, Switzerland
| |
Collapse
|
4
|
Del Arroyo AG, Hadjihambi A, Sanchez J, Turovsky E, Kasymov V, Cain D, Nightingale TD, Lambden S, Grant SGN, Gourine AV, Ackland GL. NMDA receptor modulation of glutamate release in activated neutrophils. EBioMedicine 2019; 47:457-469. [PMID: 31401196 PMCID: PMC6796524 DOI: 10.1016/j.ebiom.2019.08.004] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2019] [Revised: 08/01/2019] [Accepted: 08/01/2019] [Indexed: 01/05/2023] Open
Abstract
Background Neutrophil depletion improves neurologic outcomes in experimental sepsis/brain injury. We hypothesized that neutrophils may exacerbate neuronal injury through the release of neurotoxic quantities of the neurotransmitter glutamate. Methods Real-time glutamate release by primary human neutrophils was determined using enzymatic biosensors. Bacterial and direct protein-kinase C (Phorbol 12-myristate 13-acetate; PMA) activation of neutrophils in human whole blood, isolated neutrophils or human cell lines were compared in the presence/absence of N-Methyl-d-aspartic acid receptor (NMDAR) antagonists. Bacterial and direct activation of neutrophils from wild-type and transgenic murine neutrophils deficient in NMDAR-scaffolding proteins were compared using flow cytometry (phagocytosis, reactive oxygen species (ROS) generation) and real-time respirometry (oxygen consumption). Findings Both glutamate and the NMDAR co-agonist d-serine are rapidly released by neutrophils in response to bacterial and PMA-induced activation. Pharmacological NMDAR blockade reduced both the autocrine release of glutamate, d-serine and the respiratory burst by activated primary human neutrophils. A highly specific small-molecule inhibitor ZL006 that limits NMDAR-mediated neuronal injury also reduced ROS by activated neutrophils in a murine model of peritonitis, via uncoupling of the NMDAR GluN2B subunit from its' scaffolding protein, postsynaptic density protein-95 (PSD-95). Genetic ablation of PSD-95 reduced ROS production by activated murine neutrophils. Pharmacological blockade of the NMDAR GluN2B subunit reduced primary human neutrophil activation induced by Pseudomonas fluorescens, a glutamate-secreting Gram-negative bacillus closely related to pathogens that cause hospital-acquired infections. Interpretation These data suggest that release of glutamate by activated neutrophils augments ROS production in an autocrine manner via actions on NMDAR expressed by these cells. Fund GLA: Academy Medical Sciences/Health Foundation Clinician Scientist. AVG is a Wellcome Trust Senior Research Fellow. Neutrophil depletion improves neurologic outcome after injury and infection. Pharmacologic NMDAR blockade reduces rapid autocrine release of glutamate/d-serine from activated neutrophils. Genetic ablation/small-molecule inhibition of PSD-95 reduces neutrophil ROS. NMDAR blockade reduces human neutrophil activated by glutamate-secreting bacteria. Activated neutrophils may exacerbate neuronal injury in various forms of critical illness through the release of glutamate.
Collapse
Affiliation(s)
- Ana Gutierrez Del Arroyo
- Translational Medicine and Therapeutics, William Harvey Research Institute, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London EC1M 6BQ, United Kingdom
| | - Anna Hadjihambi
- Centre for Cardiovascular and Metabolic Neuroscience, Neuroscience, Physiology and Pharmacology, University College London, London WC1E 6BT, United Kingdom
| | - Jenifer Sanchez
- Translational Medicine and Therapeutics, William Harvey Research Institute, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London EC1M 6BQ, United Kingdom
| | - Egor Turovsky
- Institute of Cell Biophysics, Federal Research Center, Pushchino Scientific Center for Biological Research, Russian Academy of Sciences, Russia
| | - Vitaly Kasymov
- Centre for Cardiovascular and Metabolic Neuroscience, Neuroscience, Physiology and Pharmacology, University College London, London WC1E 6BT, United Kingdom
| | - David Cain
- Clinical Physiology, Department of Medicine, University College London, United Kingdom
| | - Tom D Nightingale
- Centre for Microvascular Research, William Harvey Research Institute, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London EC1M 6BQ, United Kingdom
| | - Simon Lambden
- Clinical Physiology, Department of Medicine, University College London, United Kingdom
| | - Seth G N Grant
- Centre for Clinical Brain Sciences, University of Edinburgh, Edinburgh EH16 4SB, United Kingdom
| | - Alexander V Gourine
- Centre for Cardiovascular and Metabolic Neuroscience, Neuroscience, Physiology and Pharmacology, University College London, London WC1E 6BT, United Kingdom
| | - Gareth L Ackland
- Translational Medicine and Therapeutics, William Harvey Research Institute, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London EC1M 6BQ, United Kingdom; Centre for Cardiovascular and Metabolic Neuroscience, Neuroscience, Physiology and Pharmacology, University College London, London WC1E 6BT, United Kingdom.
| |
Collapse
|
5
|
Peng X, Li X, Li C, Yue S, Huang Y, Huang P, Cheng H, Zhou Y, Tang Y, Liu W, Feng D, Luo Z. NMDA receptor activation inhibits the protective effect of BM‑MSCs on bleomycin‑induced lung epithelial cell damage by inhibiting ERK signaling and the paracrine factor HGF. Int J Mol Med 2019; 44:227-239. [PMID: 31115492 PMCID: PMC6559344 DOI: 10.3892/ijmm.2019.4195] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2018] [Accepted: 05/07/2019] [Indexed: 12/12/2022] Open
Abstract
Endoplasmic reticulum (ER) stress in alveolar epithelial cells (AECs) is associated with the pathogenesis of pulmonary fibrosis. Bone marrow‑derived mesenchymal stromal cells (BM‑MSCs) can exert protective effects on ER‑stressed AECs via paracrine signaling. In the present study, mouse lung epithelial (MLE)‑12 cells were directly stimulated with various concentrations of bleomycin (BLM). MLE‑12 cell apoptosis was detected by flow cytometry, and Ki67 expression was detected by immunofluorescence to reflect cell proliferation. The results revealed that BLM increased the protein expression levels of X‑box binding protein 1 and immunoglobulin heavy chain‑binding protein, thus inducing ER stress, and caused cell dysfunction by inhibiting proliferation and promoting apoptosis. In addition, MSC‑derived conditioned medium (MSC‑CM) protected MLE‑12 cells from BLM‑induced injury, by reducing ER stress, promoting cell proliferation and inhibiting cell apoptosis. Our previous studies reported that N‑methyl‑D‑aspartate (NMDA) receptor activation partially inhibits the antifibrotic effect of BM‑MSCs on BLM‑induced pulmonary fibrosis through downregulating the paracrine factor hepatocyte growth factor (HGF). In the present study, the synthesis and secretion of HGF were detected by western blotting and ELISA, respectively. Results further demonstrated that NMDA inhibited the synthesis and secretion of HGF in BM‑MSCs, and NMDA‑preconditioned MSC‑CM had no protective effects on BLM‑induced injury in MLE‑12 cells. In addition, activation of the NMDA receptor decreased the phosphorylation levels of extracellular signal‑regulated kinase (ERK)1/2 in BM‑MSCs. Using Honokiol and FR180204, the activator and inhibitor of ERK1/2, respectively, it was then revealed that Honokiol partially eliminated the decrease in HGF expression, whereas FR180204 further promoted the reduction in HGF caused by NMDA. Collectively, these findings suggested that NMDA receptor activation may downregulate HGF by inhibiting ERK signaling in BM‑MSCs, thus weakening their protective effects on BLM‑induced lung epithelial cell damage.
Collapse
Affiliation(s)
- Xiangping Peng
- Department of Physiology, Xiangya School of Medicine, Central South University, Changsha, Hunan 410078, P.R. China
| | - Xiaohong Li
- Department of Physiology, Xiangya School of Medicine, Central South University, Changsha, Hunan 410078, P.R. China
| | - Chen Li
- Department of Physiology, Changzhi Medical College, Changzhi, Shanxi 046000, P.R. China
| | - Shaojie Yue
- Department of Neonatology, Xiangya Hospital, Central South University, Changsha, Hunan 410078, P.R. China
| | - Yanhong Huang
- Department of Physiology, Xiangya School of Medicine, Central South University, Changsha, Hunan 410078, P.R. China
| | - Pu Huang
- Department of Physiology, Xiangya School of Medicine, Central South University, Changsha, Hunan 410078, P.R. China
| | - Haipeng Cheng
- Department of Physiology, Xiangya School of Medicine, Central South University, Changsha, Hunan 410078, P.R. China
| | - Yan Zhou
- Department of Physiology, Xiangya School of Medicine, Central South University, Changsha, Hunan 410078, P.R. China
| | - Yiting Tang
- Department of Physiology, Xiangya School of Medicine, Central South University, Changsha, Hunan 410078, P.R. China
| | - Wei Liu
- Department of Community Nursing, Xiangya Nursing School, Central South University, Changsha, Hunan 410078, P.R. China
| | - Dandan Feng
- Department of Physiology, Xiangya School of Medicine, Central South University, Changsha, Hunan 410078, P.R. China
| | - Ziqiang Luo
- Department of Physiology, Xiangya School of Medicine, Central South University, Changsha, Hunan 410078, P.R. China
| |
Collapse
|
6
|
The protective effect of oleanolic acid on NMDA-induced MLE-12 cells apoptosis and lung injury in mice by activating SIRT1 and reducing NF-κB acetylation. Int Immunopharmacol 2019; 70:520-529. [DOI: 10.1016/j.intimp.2019.03.018] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2019] [Revised: 03/04/2019] [Accepted: 03/06/2019] [Indexed: 12/12/2022]
|
7
|
Feasibility of lung microdialysis to assess metabolism during clinical ex vivo lung perfusion. J Heart Lung Transplant 2019; 38:267-276. [DOI: 10.1016/j.healun.2018.12.015] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2018] [Revised: 12/12/2018] [Accepted: 12/16/2018] [Indexed: 11/20/2022] Open
|
8
|
Wu C, Wang J, Guo X, Zhang Y. Ketamine exacerbates cortical neuroapoptosis under hyperoxic conditions by upregulating expression of the N-methyl-D-aspartate receptor subunit NR1 in the developing rat brain. BMC Anesthesiol 2018; 18:52. [PMID: 29747570 PMCID: PMC5944052 DOI: 10.1186/s12871-018-0511-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2017] [Accepted: 04/25/2018] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Ketamine and hyperoxia are widely used in obstetric and pediatric settings. Either ketamine or hyperoxia has been reported to cause neuroapoptosis in the developing brain, and ketamine-induced neuronal apoptosis may involve a compensatory upregulation of the N-methyl-D-aspartate (NMDA) receptor NR1 subunit. This study investigated the impact of ketamine administration under hyperoxic conditions on cortical neuroapoptosis and NR1 subunit expression in the infant rat brain. METHODS Male, 7-day-old rats were randomly allocated to four groups: control, ketamine, hyperoxia, and ketamine + hyperoxia (n = 18 per group). Rats in the control and ketamine groups received subcutaneous injections of either vehicle (saline) or ketamine (50 mg/kg) in room air (21% oxygen). The hyperoxia and ketamine + hyperoxia groups were exposed to 60% oxygen for 2 h after receiving saline or ketamine. Physiological parameters and arterial oxygen saturation were observed. Neuronal apoptosis and the expressions of NR1 mRNA and protein in the frontal cortex were also examined by transferase dUTP nick end labeling (TUNEL) assays, qPCR and Western blot, respectively. RESULTS Ketamine alone had no effect on paO2 (P > 0.05), but pups exposed to hyperoxia or hyperoxia + ketamine had significantly greater paO2 values compared to control animals (P < 0.01). Animals exposed to ketamine and ketamine + hyperoxia showed higher apoptotic scores, mRNA and protein expression levels of NR1 than control animals (P < 0.01), and ketamine + hyperoxia caused a significantly greater increase than ketamine alone (P < 0.01). CONCLUSIONS These data suggest that ketamine administration under hyperoxic conditions exacerbates cortical neuroapoptosis in the developing brain, which may be closely associated with an enhancement in NMDA receptor NR1 subunit expression.
Collapse
Affiliation(s)
- Changyi Wu
- Department of Anesthesiology, Peking University Third Hospital, Beijing, 100191, People's Republic of China
| | - Jun Wang
- Department of Anesthesiology, Peking University Third Hospital, Beijing, 100191, People's Republic of China
| | - Xiangyang Guo
- Department of Anesthesiology, Peking University Third Hospital, Beijing, 100191, People's Republic of China
| | - Ying Zhang
- Department of Rehabilitation, China Rehabilitation Research Center, Boai Hospital, School of Rehabilitation Medicine, Capital Medical University, 10 North Road, Fengtai District, Beijing, 100077, People's Republic of China.
| |
Collapse
|
9
|
Li X, Li C, Tang Y, Huang Y, Cheng Q, Huang X, Zhao F, Hao C, Feng D, Xu J, Han J, Tang S, Liu W, Yue S, Luo Z. NMDA receptor activation inhibits the antifibrotic effect of BM-MSCs on bleomycin-induced pulmonary fibrosis. Am J Physiol Lung Cell Mol Physiol 2018; 315:L404-L421. [PMID: 29722562 PMCID: PMC6172623 DOI: 10.1152/ajplung.00002.2018] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Endogenous glutamate (Glu) release and N-methyl-d-aspartate (NMDA) receptor (NMDAR) activation are associated with lung injury in different animal models. However, the underlying mechanism is unclear. Bone marrow-derived mesenchymal stem cells (BM-MSCs), which show potential use for immunomodulation and tissue protection, play a protective role in pulmonary fibrosis (PF) process. Here, we found the increased Glu release from the BM cells of bleomycin (BLM)-induced PF mice in vivo. BLM stimulation also increased the extracellular Glu in BM-MSCs via the antiporter system xc− in vitro. The gene expression of each subunit of NMDAR was detected in BM-MSCs. NMDAR activation inhibited the proliferation, migration, and paracrine function of BM-MSCs in vitro. BM-MSCs were derived from male C57BL/6 mice, transfected with lentiviral vectors carrying the enhanced green fluorescence protein gene, pretreated with NMDA, and transplanted into the female recipient mice that were intratracheally injected with BLM to induce PF. Transplantation of NMDA-pretreated BM-MSCs significantly aggravated PF as compared with that in the normal BM-MSCs transplantation group. The sex determination gene Y chromosome and green fluorescence protein genes of BM-MSCs were detected to observe BM-MSCs homing in the fibrotic lungs. Moreover, NMDAR activation inhibited BM-MSC migration by downregulating the stromal cell-derived factor-1/C-X-C chemokine receptor type 4 signaling axis. NMDAR activation aggravated the transforming growth factor-β1-induced extracellular matrix production in alveolar epithelial cells and fibroblasts through the paracrine effects of BM-MSCs. In summary, these findings suggested that NMDAR activation-mediated Glu excitotoxicity induced by BLM in BM-MSCs abolished the therapeutic effects of normal BM-MSCs transplantation on BLM-induced PF.
Collapse
Affiliation(s)
- Xiaohong Li
- Department of Physiology, Xiangya School of Medicine, Central South University , Changsha, Hunan , China
| | - Chen Li
- Department of Physiology, Changzhi Medical College, Changzhi, Shanxi , China
| | - Yiting Tang
- Department of Physiology, Xiangya School of Medicine, Central South University , Changsha, Hunan , China
| | - Yanhong Huang
- Department of Physiology, Xiangya School of Medicine, Central South University , Changsha, Hunan , China
| | - Qingmei Cheng
- Department of Physiology, Xiangya School of Medicine, Central South University , Changsha, Hunan , China
| | - Xiaoting Huang
- Department of Physiology, Xiangya School of Medicine, Central South University , Changsha, Hunan , China
| | - Feiyan Zhao
- Department of Physiology, Xiangya School of Medicine, Central South University , Changsha, Hunan , China
| | - Caixia Hao
- Department of Physiology, Xiangya School of Medicine, Central South University , Changsha, Hunan , China
| | - Dandan Feng
- Department of Physiology, Xiangya School of Medicine, Central South University , Changsha, Hunan , China
| | - Jianping Xu
- Department of Physiology, Xiangya School of Medicine, Central South University , Changsha, Hunan , China
| | - Jianzhong Han
- Department of Physiology, Xiangya School of Medicine, Central South University , Changsha, Hunan , China
| | - Siyuan Tang
- Xiangya Nursing School, Central South University , Changsha, Hunan , China
| | - Wei Liu
- Xiangya Nursing School, Central South University , Changsha, Hunan , China
| | - Shaojie Yue
- Department of Pediatrics, Xiangya Hospital, Central South University , Changsha, Hunan , China
| | - Ziqiang Luo
- Department of Physiology, Xiangya School of Medicine, Central South University , Changsha, Hunan , China
| |
Collapse
|
10
|
Jones JW, Jackson IL, Vujaskovic Z, Kaytor MD, Kane MA. Targeted Metabolomics Identifies Pharmacodynamic Biomarkers for BIO 300 Mitigation of Radiation-Induced Lung Injury. Pharm Res 2017; 34:2698-2709. [PMID: 28971289 DOI: 10.1007/s11095-017-2200-9] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2017] [Accepted: 05/30/2017] [Indexed: 01/05/2023]
Abstract
PURPOSE Biomarkers serve a number of purposes during drug development including defining the natural history of injury/disease, serving as a secondary endpoint or trigger for intervention, and/or aiding in the selection of an effective dose in humans. BIO 300 is a patent-protected pharmaceutical formulation of nanoparticles of synthetic genistein being developed by Humanetics Corporation. The primary goal of this metabolomic discovery experiment was to identify biomarkers that correlate with radiation-induced lung injury and BIO 300 efficacy for mitigating tissue damage based upon the primary endpoint of survival. METHODS High-throughput targeted metabolomics of lung tissue from male C57L/J mice exposed to 12.5 Gy whole thorax lung irradiation, treated daily with 400 mg/kg BIO 300 for either 2 weeks or 6 weeks starting 24 h post radiation exposure, were assayed at 180 d post-radiation to identify potential biomarkers. RESULTS A panel of lung metabolites that are responsive to radiation and able to distinguish an efficacious treatment schedule of BIO 300 from a non-efficacious treatment schedule in terms of 180 d survival were identified. CONCLUSIONS These metabolites represent potential biomarkers that could be further validated for use in drug development of BIO 300 and in the translation of dose from animal to human.
Collapse
Affiliation(s)
- Jace W Jones
- School of Pharmacy, Department of Pharmaceutical Sciences, University of Maryland, 20 N. Pine Street, Baltimore, Maryland, 21201, USA
| | - Isabel L Jackson
- School of Medicine, Division of Translational Radiation Sciences Department of Radiation Oncology, University of Maryland, Baltimore, 21201, Maryland, USA
| | - Zeljko Vujaskovic
- School of Medicine, Division of Translational Radiation Sciences Department of Radiation Oncology, University of Maryland, Baltimore, 21201, Maryland, USA
| | | | - Maureen A Kane
- School of Pharmacy, Department of Pharmaceutical Sciences, University of Maryland, 20 N. Pine Street, Baltimore, Maryland, 21201, USA.
| |
Collapse
|
11
|
Wang Y, Yue S, Luo Z, Cao C, Yu X, Liao Z, Wang M. N-methyl-D-aspartate receptor activation mediates lung fibroblast proliferation and differentiation in hyperoxia-induced chronic lung disease in newborn rats. Respir Res 2016; 17:136. [PMID: 27769245 PMCID: PMC5075180 DOI: 10.1186/s12931-016-0453-1] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2016] [Accepted: 10/14/2016] [Indexed: 02/07/2023] Open
Abstract
Background Previous studies have suggested that endogenous glutamate and its N-methyl-D-aspartate receptors (NMDARs) play important roles in hyperoxia-induced acute lung injury in newborn rats. We hypothesized that NMDAR activation also participates in the development of chronic lung injury after withdrawal of hyperoxic conditions. Methods In order to rule out the anti-inflammatory effects of NMDAR inhibitor on acute lung injury, the efficacy of MK-801 was evaluated in vivo using newborn Sprague-Dawley rats treated starting 4 days after cessation of hyperoxia exposure (on postnatal day 8). The role of NMDAR activation in hyperoxia-induced lung fibroblast proliferation and differentiation was examined in vitro using primary cells derived from the lungs of 8-day-old Sprague-Dawley rats exposed to hyperoxic conditions. Results Hyperoxia for 3 days induced acute lung injury in newborn rats. The acute injury almost completely disappeared 4 days after cessation of hyperoxia exposure. However, pulmonary fibrosis, impaired alveolarization, and decreased pulmonary compliance were observed on postnatal days 15 and 22. MK-801 treatment during the recovery period was found to alleviate the chronic damage induced by hyperoxia. Four NMDAR 2 s were found to be upregulated in the lung fibroblasts of newborn rats exposed to hyperoxia. In addition, the proliferation and upregulation of alpha-smooth muscle actin and (pro) collagen I in lung fibroblasts were detected in hyperoxia-exposed rats. MK-801 inhibited these changes. Conclusions NMDAR activation mediated lung fibroblast proliferation and differentiation and played a role in the development of hyperoxia-induced chronic lung damage in newborn rats.
Collapse
Affiliation(s)
- YanRui Wang
- Department of Neonatology, Xiangya Hospital, Central South University, Xiangya Road 87, Changsha, 410008, China.,Department of Neonatology, Heze Municipal Hospital, Heze, 274000, China
| | - ShaoJie Yue
- Department of Neonatology, Xiangya Hospital, Central South University, Xiangya Road 87, Changsha, 410008, China
| | - ZiQiang Luo
- Department of Physiology, Xiangya Medical College, Central South University, Changsha, 410008, China
| | - ChuanDing Cao
- Department of Neonatology, Xiangya Hospital, Central South University, Xiangya Road 87, Changsha, 410008, China
| | - XiaoHe Yu
- Department of Neonatology, Xiangya Hospital, Central South University, Xiangya Road 87, Changsha, 410008, China
| | - ZhengChang Liao
- Department of Neonatology, Xiangya Hospital, Central South University, Xiangya Road 87, Changsha, 410008, China
| | - MingJie Wang
- Department of Neonatology, Xiangya Hospital, Central South University, Xiangya Road 87, Changsha, 410008, China.
| |
Collapse
|
12
|
N-Methyl-D-aspartate Receptor Excessive Activation Inhibited Fetal Rat Lung Development In Vivo and In Vitro. BIOMED RESEARCH INTERNATIONAL 2016; 2016:5843981. [PMID: 27478831 PMCID: PMC4958417 DOI: 10.1155/2016/5843981] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/21/2016] [Accepted: 05/26/2016] [Indexed: 11/26/2022]
Abstract
Background. Intrauterine hypoxia is a common cause of fetal growth and lung development restriction. Although N-methyl-D-aspartate receptors (NMDARs) are distributed in the postnatal lung and play a role in lung injury, little is known about NMDAR's expression and role in fetal lung development. Methods. Real-time PCR and western blotting analysis were performed to detect NMDARs between embryonic days (E) 15.5 and E21.5 in fetal rat lungs. NMDAR antagonist MK-801's influence on intrauterine hypoxia-induced retardation of fetal lung development was tested in vivo, and NMDA's direct effect on fetal lung development was observed using fetal lung organ culture in vitro. Results. All seven NMDARs are expressed in fetal rat lungs. Intrauterine hypoxia upregulated NMDARs expression in fetal lungs and decreased fetal body weight, lung weight, lung-weight-to-body-weight ratio, and radial alveolar count, whereas MK-801 alleviated this damage in vivo. In vitro experiments showed that NMDA decreased saccular circumference and area per unit and downregulated thyroid transcription factor-1 and surfactant protein-C mRNA expression. Conclusions. The excessive activation of NMDARs contributed to hypoxia-induced fetal lung development retardation and appropriate blockade of NMDAR might be a novel therapeutic strategy for minimizing the negative outcomes of prenatal hypoxia on lung development.
Collapse
|
13
|
Du J, Li XH, Li YJ. Glutamate in peripheral organs: Biology and pharmacology. Eur J Pharmacol 2016; 784:42-8. [PMID: 27164423 DOI: 10.1016/j.ejphar.2016.05.009] [Citation(s) in RCA: 51] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2016] [Revised: 04/29/2016] [Accepted: 05/04/2016] [Indexed: 01/28/2023]
Abstract
Glutamate is a versatile molecule existing in both the central nervous system and peripheral organs. Previous studies have mainly focussed on the biological effect of glutamate in the brain. Recently, abundant evidence has demonstrated that glutamate also participates in the regulation of physiopathological functions in peripheral tissues, including the lung, kidney, liver, heart, stomach and immune system, where the glutamate/glutamate receptor/glutamate transporter system plays an important role in the pathogenesis of certain diseases, such as myocardial ischaemia/reperfusion injury and acute gastric mucosa injury. All these findings provide new insight into the biology and pharmacology of glutamate and suggest a potential therapeutic role of glutamate in non-neurological diseases.
Collapse
Affiliation(s)
- Jie Du
- Department of Pharmacology, School of Pharmaceutical Sciences, Central South University, Changsha 410078, China; Department of Pharmacy, Xiangya Hospital, Central South University, Changsha 410008, China
| | - Xiao-Hui Li
- Department of Pharmacology, School of Pharmaceutical Sciences, Central South University, Changsha 410078, China
| | - Yuan-Jian Li
- Department of Pharmacology, School of Pharmaceutical Sciences, Central South University, Changsha 410078, China.
| |
Collapse
|
14
|
Antošová M, Strapková A. Study of the interaction of glutamatergic and nitrergic signalling in conditions of the experimental airways hyperreactivity. Pharmacol Rep 2013; 65:650-7. [DOI: 10.1016/s1734-1140(13)71042-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2012] [Revised: 02/01/2013] [Indexed: 11/27/2022]
|
15
|
Sun H, Choo-Wing R, Sureshbabu A, Fan J, Leng L, Yu S, Jiang D, Noble P, Homer RJ, Bucala R, Bhandari V. A critical regulatory role for macrophage migration inhibitory factor in hyperoxia-induced injury in the developing murine lung. PLoS One 2013; 8:e60560. [PMID: 23637753 PMCID: PMC3639272 DOI: 10.1371/journal.pone.0060560] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2012] [Accepted: 02/27/2013] [Indexed: 01/11/2023] Open
Abstract
BACKGROUND The role and mechanism of action of MIF in hyperoxia-induced acute lung injury (HALI) in the newborn lung are not known. We hypothesized that MIF is a critical regulatory molecule in HALI in the developing lung. METHODOLOGY We studied newborn wild type (WT), MIF knockout (MIFKO), and MIF lung transgenic (MIFTG) mice in room air and hyperoxia exposure for 7 postnatal (PN) days. Lung morphometry was performed and mRNA and protein expression of vascular mediators were analyzed. RESULTS MIF mRNA and protein expression were significantly increased in WT lungs at PN7 of hyperoxia exposure. The pattern of expression of Angiopoietin 2 protein (in MIFKO>WT>MIFTG) was similar to the mortality pattern (MIFKO>WT>MIFTG) in hyperoxia at PN7. In room air, MIFKO and MIFTG had modest but significant increases in chord length, compared to WT. This was associated with decreased expression of Angiopoietin 1 and Tie 2 proteins in the MIFKO and MIFTG, as compared to the WT control lungs in room air. However, on hyperoxia exposure, while the chord length was increased from their respective room air controls, there were no differences between the 3 genotypes. CONCLUSION These data point to the potential roles of Angiopoietins 1, 2 and their receptor Tie2 in the MIF-regulated response in room air and upon hyperoxia exposure in the neonatal lung.
Collapse
Affiliation(s)
- Huanxing Sun
- Department of Pediatrics, Yale University, New Haven, Connecticut, United States of America
| | - Rayman Choo-Wing
- Department of Pediatrics, Yale University, New Haven, Connecticut, United States of America
| | - Angara Sureshbabu
- Department of Pediatrics, Yale University, New Haven, Connecticut, United States of America
| | - Juan Fan
- Department of Medicine, Yale University, New Haven, Connecticut, United States of America
| | - Lin Leng
- Department of Medicine, Yale University, New Haven, Connecticut, United States of America
| | - Shuang Yu
- Department of Medicine, Yale University, New Haven, Connecticut, United States of America
| | - Dianhua Jiang
- Department of Medicine, Duke University School of Medicine, Durham, North Carolina, United States of America
| | - Paul Noble
- Department of Medicine, Duke University School of Medicine, Durham, North Carolina, United States of America
| | - Robert J. Homer
- Department of Pathology, Yale University, New Haven, Connecticut, United States of America
| | - Richard Bucala
- Department of Medicine, Yale University, New Haven, Connecticut, United States of America
| | - Vineet Bhandari
- Department of Pediatrics, Yale University, New Haven, Connecticut, United States of America
- * E-mail:
| |
Collapse
|
16
|
Turan A, Mascha EJ, You J, Kurz A, Shiba A, Saager L, Sessler DI. The association between nitrous oxide and postoperative mortality and morbidity after noncardiac surgery. Anesth Analg 2012; 116:1026-1033. [PMID: 22822187 DOI: 10.1213/ane.0b013e31824590a5] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
BACKGROUND Nitrous oxide (N2O) has been widely used in clinical anesthesia for >150 years. However, use of N2O has decreased in recent years because of concern about the drug's metabolic side effects. But evidence that routine use of N2O causes clinically important toxicity remains elusive. We therefore evaluated the relationship between intraoperative N2O administration and 30-day mortality as well as a set of major inpatient postoperative complications (including mortality) in adults who had general anesthesia for noncardiac surgery. METHODS We evaluated 49,016 patients who had noncardiac surgery at the Cleveland Clinic between 2005 and 2009. Among 37,609 qualifying patients, 16,961 were given N2O ("nitrous," 45%) and 20,648 were not ("nonnitrous," 55%). Ten thousand seven hundred fifty-five nitrous patients (63% of the total) were propensity score-matched with 10,755 nonnitrous patients. Matched nitrous and nonnitrous patients were compared on 30-day mortality and a set of 8 in-hospital morbidity/mortality outcomes. RESULTS Inhalation of N2O intraoperatively was associated with decreased odds of 30-day mortality (odds ratio [OR]: 97.5% confidence interval, 0.67, 0.46-0.97; P = 0.02). Furthermore, nitrous patients had an estimated 17% (OR: 0.83, 0.74-0.92) decreased odds of experiencing major in-hospital morbidity/mortality than nonnitrous (P < 0.001). Among the individual morbidities, intraoperative N2O use was only associated with significantly lower odds of having pulmonary/respiratory morbidities (OR, 95% Bonferroni-adjusted CI: 0.59, 0.44-0.78). CONCLUSIONS Intraoperative N2O administration was associated with decreased odds of 30-day mortality and decreased odds of in-hospital mortality/morbidity. Aside from its specific and well-known contraindications, the results of this study do not support eliminating N2O from anesthetic practice.
Collapse
Affiliation(s)
- Alparslan Turan
- From the Department of Outcomes Research and Department of Quantitative Health Sciences, Cleveland Clinic, Cleveland, OH; and Department of Anesthesia, McMaster University, Hamilton, Ontario, Canada
| | | | | | | | | | | | | |
Collapse
|
17
|
Yang HH, Hou CC, Lin MT, Chang CP. Attenuating Heat-Induced Acute Lung Inflammation and Injury by Dextromethorphan in Rats. Am J Respir Cell Mol Biol 2012; 46:407-13. [DOI: 10.1165/rcmb.2011-0226oc] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
|
18
|
Shang L, Luo Z, Deng X, Wang M, Huang F, Feng D, Yue S. Expression of N-methyl-d-aspartate receptor and its effect on nitric oxide production of rat alveolar macrophages. Nitric Oxide 2010; 23:327-31. [DOI: 10.1016/j.niox.2010.09.004] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2010] [Revised: 09/16/2010] [Accepted: 09/17/2010] [Indexed: 01/04/2023]
|
19
|
Shen L, Li L, She H, Yue S, Li C, Luo Z. Inhibition of Pulmonary Surfactants Synthesis during N-Methyl-d-Aspartate-Induced Lung Injury. Basic Clin Pharmacol Toxicol 2010; 107:751-7. [DOI: 10.1111/j.1742-7843.2010.00572.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
|
20
|
Nitric oxide-induced activation of NF–κB-mediated NMDA-induced CTP:phosphocholine cytidylyltransferase alpha expression inhibition in A549 cells. Cell Biol Toxicol 2010; 27:41-7. [DOI: 10.1007/s10565-010-9168-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2010] [Accepted: 05/25/2010] [Indexed: 10/19/2022]
|
21
|
da Cunha AA, Pauli V, Saciura VC, Pires MG, Constantino LC, de Souza B, Petronilho F, Rodrigues de Oliveira J, Ritter C, Romão PR, Boeck CR, Roesler R, Quevedo J, Dal-Pizzol F. N -Methyl- D -Aspartate Glutamate Receptor Blockade Attenuates Lung Injury Associated With Experimental Sepsis. Chest 2010; 137:297-302. [DOI: 10.1378/chest.09-1570] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
|
22
|
Yang HH, Chang CP, Cheng RT, Lin MT. Attenuation of acute lung inflammation and injury by whole body cooling in a rat heatstroke model. J Biomed Biotechnol 2009; 2009:768086. [PMID: 20037732 PMCID: PMC2796336 DOI: 10.1155/2009/768086] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2009] [Revised: 09/25/2009] [Accepted: 10/01/2009] [Indexed: 12/21/2022] Open
Abstract
Whole body cooling is the current therapy of choice for heatstroke because the therapeutic agents are not available. In this study, we assessed the effects of whole body cooling on several indices of acute lung inflammation and injury which might occur during heatstroke. Anesthetized rats were randomized into the following groups and given (a) no treatment or (b) whole body cooling immediately after onset of heatstroke. As compared with the normothermic controls, the untreated heatstroke rats had higher levels of pleural exudates volume and polymorphonuclear cell numbers, lung myloperoxidase activity and inducible nitric oxide synthase expression, histologic lung injury score, and bronchoalveolar proinflammatory cytokines and glutamate, and PaCO2. In contrast, the values of mean arterial pressure, heart rate, PaO2, pH, and blood HCO3(-) were all significantly lower during heatstroke. The acute lung inflammation and injury and electrolyte imbalance that occurred during heatstroke were significantly reduced by whole body cooling. In conclusion, we identified heat-induced acute lung inflammation and injury and electrolyte imbalance could be ameliorated by whole body cooling.
Collapse
Affiliation(s)
- Hsi-Hsing Yang
- Institute of Pharmacology, National Cheng Kung University Medical School, Tainan 701, Taiwan
- Department of Internal Medicine, Chi Mei Medical Center, Tainan 710, Taiwan
| | - Ching-Ping Chang
- Department of Biotechnology, Southern Taiwan University, Tainan 710, Taiwan
| | - Ruei-Tang Cheng
- Department of Medical Research, Chi Mei Medical Center, Tainan 710, Taiwan
| | - Mao-Tsun Lin
- Department of Medical Research, Chi Mei Medical Center, Tainan 710, Taiwan
| |
Collapse
|
23
|
Wang M, Luo Z, Liu S, Li L, Deng X, Huang F, Shang L, Jian C, Yue S. Glutamate Mediates Hyperoxia-Induced Newborn Rat Lung Injury through N-Methyl-D-Aspartate Receptors. Am J Respir Cell Mol Biol 2009; 40:260-7. [DOI: 10.1165/rcmb.2008-0135oc] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
|
24
|
Auten RL, Mason SN, Whorton MH, Lampe WR, Foster WM, Goldberg RN, Li B, Stamler JS, Auten KM. Inhaled ethyl nitrite prevents hyperoxia-impaired postnatal alveolar development in newborn rats. Am J Respir Crit Care Med 2007; 176:291-9. [PMID: 17478622 PMCID: PMC1994219 DOI: 10.1164/rccm.200605-662oc] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
RATIONALE Inhaled nitric oxide (NO) has been used to prevent bronchopulmonary dysplasia, but with variable results. Ethyl nitrite (ENO) forms S-nitrosothiols more readily than does NO, and resists higher-order nitrogen oxide formation. Because S-nitrosylation is a key pathway mediating many NO biological effects, treatment with inhaled ENO may better protect postnatal lung development from oxidative stress than NO. OBJECTIVES To compare inhaled NO and ENO on hyperoxia-impaired postnatal lung development. METHODS We treated newborn rats beginning at birth to air or 95% O(2) +/- 0.2-20.0 ppm ENO for 8 days, or to 10 ppm NO for 8 days. Pups treated with the optimum ENO dose, 10 ppm, and pups treated with 10 ppm NO were recovered in room air for 6 more days. MEASUREMENTS AND MAIN RESULTS ENO and NO partly prevented 95% O(2)-induced airway neutrophil influx in lavage, but ENO had a greater effect than did NO in prevention of lung myeloperoxidase accumulation, and in expression of cytokine-induced neutrophil chemoattractant-1. Treatment with 10 ppm ENO, but not NO, for 8 days followed by recovery in air for 6 days prevented 95% O(2)-induced impairments of body weight, lung compliance, and alveolar development. CONCLUSIONS Inhaled ENO conferred protection superior to inhaled NO against hyperoxia-induced inflammation. ENO prevented hyperoxia impairments of lung compliance and postnatal alveolar development in newborn rats.
Collapse
Affiliation(s)
- Richard L Auten
- Division of Neonatal Medicine, Department of Pediatrics, Neonatal-Perinatal Research Institute, University Medical Center, Durham, North Carolina 27710, USA.
| | | | | | | | | | | | | | | | | |
Collapse
|
25
|
Mortari MR, Cunha AOS, Ferreira LB, dos Santos WF. Neurotoxins from invertebrates as anticonvulsants: From basic research to therapeutic application. Pharmacol Ther 2007; 114:171-83. [PMID: 17399793 DOI: 10.1016/j.pharmthera.2007.01.009] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2007] [Revised: 01/19/2007] [Accepted: 01/19/2007] [Indexed: 12/21/2022]
Abstract
Invertebrate venoms have attracted considerable interest as a potential source of bioactive substances, especially neurotoxins. These molecules have proved to be extremely useful tools for the understanding of synaptic transmission events, and they have contributed to the design of novel drugs for the treatment of neurological disorders and pain. In this context, as epilepsy involves neuronal substrates, which are sites of action of many neurotoxins; venoms may be particularly useful for antiepileptic drug (AED) research. Epilepsy is a chronic disease whose treatment consists of controlling seizures with antiepileptics that very often induce strong undesirable side effects that may limit treatment. Here, we review the vast, but yet unexplored, world of neurotoxins from invertebrates used as probes in pharmacological screening for novel and less toxic antiepileptics. We briefly review (1) the molecular basis of epilepsy, as well as the sites of action of commonly used anticonvulsants (we bring a comprehensive review of the elements from invertebrate venoms which are mostly studied in neuroscience research and may be useful for drug development); (2) peptides from conus snails; (3) peptides and polyamine toxins from spiders and wasps; and (4) peptides from scorpions.
Collapse
Affiliation(s)
- Márcia Renata Mortari
- Neurobiology and Venoms Laboratory, Department of Biology, School of Philosophy, Sciences and Literature, University of São Paulo Ribeirão Preto, Brazil
| | | | | | | |
Collapse
|