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Li K, Li Y, Chen Y, Chen T, Yang Y, Li P. Ion Channels Remodeling in the Regulation of Vascular Hyporesponsiveness During Shock. Microcirculation 2024:e12874. [PMID: 39011763 DOI: 10.1111/micc.12874] [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: 07/19/2023] [Revised: 04/07/2024] [Accepted: 06/16/2024] [Indexed: 07/17/2024]
Abstract
Shock is characterized with vascular hyporesponsiveness to vasoconstrictors, thereby to cause refractory hypotension, insufficient tissue perfusion, and multiple organ dysfunction. The vascular hyporeactivity persisted even though norepinephrine and fluid resuscitation were administrated, it is of critical importance to find new potential target. Ion channels are crucial in the regulation of cell membrane potential and affect vasoconstriction and vasodilation. It has been demonstrated that many types of ion channels including K+ channels, Ca2+ permeable channels, and Na+ channels exist in vascular smooth muscle cells and endothelial cells, contributing to the regulation of vascular homeostasis and vasomotor function. An increasing number of studies suggested that the structural and functional alterations of ion channels located in arteries contribute to vascular hyporesponsiveness during shock, but the underlying mechanisms remained to be fully clarified. Therefore, the expression and functional changes in ion channels in arteries associated with shock are reviewed, to pave the way for further exploring the potential of ion channel-targeted compounds in treating refractory hypotension in shock.
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Affiliation(s)
- Keqing Li
- The Key Laboratory of Medical Electrophysiology, Ministry of Education and Medical Electrophysiological Key Lab of Sichuan Province, Institute of Cardiovascular Research, Southwest Medical University, Luzhou, Sichuan, China
| | - Yuan Li
- The Key Laboratory of Medical Electrophysiology, Ministry of Education and Medical Electrophysiological Key Lab of Sichuan Province, Institute of Cardiovascular Research, Southwest Medical University, Luzhou, Sichuan, China
| | - Yinghong Chen
- The Key Laboratory of Medical Electrophysiology, Ministry of Education and Medical Electrophysiological Key Lab of Sichuan Province, Institute of Cardiovascular Research, Southwest Medical University, Luzhou, Sichuan, China
| | - Tangting Chen
- The Key Laboratory of Medical Electrophysiology, Ministry of Education and Medical Electrophysiological Key Lab of Sichuan Province, Institute of Cardiovascular Research, Southwest Medical University, Luzhou, Sichuan, China
| | - Yan Yang
- The Key Laboratory of Medical Electrophysiology, Ministry of Education and Medical Electrophysiological Key Lab of Sichuan Province, Institute of Cardiovascular Research, Southwest Medical University, Luzhou, Sichuan, China
| | - Pengyun Li
- The Key Laboratory of Medical Electrophysiology, Ministry of Education and Medical Electrophysiological Key Lab of Sichuan Province, Institute of Cardiovascular Research, Southwest Medical University, Luzhou, Sichuan, China
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Wu J, Wang X, Chung YY, Koh CH, Liu Z, Guo H, Yuan Q, Wang C, Su S, Wei H. L-Type Calcium Channel Inhibition Contributes to the Proarrhythmic Effects of Aconitine in Human Cardiomyocytes. PLoS One 2017; 12:e0168435. [PMID: 28056022 PMCID: PMC5215924 DOI: 10.1371/journal.pone.0168435] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2016] [Accepted: 12/01/2016] [Indexed: 01/17/2023] Open
Abstract
Aconitine (ACO) is well-known for causing lethal ventricular tachyarrhythmias. While cardiac Na+ channel opening during repolarization has long been documented in animal cardiac myocytes, the cellular effects and mechanism of ACO in human remain unexplored. This study aimed to assess the proarrhythmic effects of ACO in human induced pluripotent stem cell-derived cardiomyocytes (hiPSC-CMs). ACO concentration-dependently (0.3 ~ 3.0 μM) shortened the action potentials (AP) durations (APD) in ventricular-like hiPSC-CMs by > 40% and induced delayed after-depolarization. Laser-scanning confocal calcium imaging analysis showed that ACO decreased the duration and amplitude of [Ca2+]i transients and increased in the beating frequencies by over 60%. Moreover, ACO was found to markedly reduce the L-type calcium channel (LTCC) currents (ICa,L) in hiPSC-CMs associated with a positive-shift of activation and a negative shift of inactivation. ACO failed to alter the peak and late Na+ currents (INa) in hiPSC-CMs while it drastically increased the late INa in Guinea-pig ventricular myocytes associated with enhanced activation/delayed inactivation of INa at -55 mV~ -85 mV. Further, the effects of ACO on ICa,L, INa and the rapid delayed rectifier potassium current (Ikr) were validated in heterologous expression systems by automated voltage-clamping assays and a moderate suppression of Ikr was observed in addition to concentration-dependent ICa,L inhibition. Lastly, increased beating frequency, decreased Ca2+ wave and shortened field potential duration were recorded from hiPSC-CMs by microelectrode arrays assay. In summary, our data demonstrated that LTCC inhibition could play a main role in the proarrhythmic action of ACO in human cardiomyocytes.
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Affiliation(s)
- Jianjun Wu
- National Heart Research Institute Singapore, National Heart Centre Singapore, Singapore
| | - Xiangchong Wang
- Department of Pharmacology, Hebei Medical University, Shijiazhuang, Hebei, China
| | - Ying Ying Chung
- National Heart Research Institute Singapore, National Heart Centre Singapore, Singapore
| | - Cai Hong Koh
- National Heart Research Institute Singapore, National Heart Centre Singapore, Singapore
| | - Zhenfeng Liu
- National Heart Research Institute Singapore, National Heart Centre Singapore, Singapore
| | - Huicai Guo
- Department of Toxicology, Hebei Medical University, Shijiazhuang, Hebei, China
| | - Qiang Yuan
- Neuroscience & Behavioral Disorders Program, Duke-NUS Medical School Singapore, Singapore
| | - Chuan Wang
- Department of Pharmacology, Hebei Medical University, Shijiazhuang, Hebei, China
| | - Suwen Su
- Department of Pharmacology, Hebei Medical University, Shijiazhuang, Hebei, China
- * E-mail: (HW); (SS)
| | - Heming Wei
- National Heart Research Institute Singapore, National Heart Centre Singapore, Singapore
- Cardiovascular & Metabolic Disorders Program, Duke-NUS Medical School Singapore, Singapore
- * E-mail: (HW); (SS)
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Postshock mesenteric lymph drainage ameliorates vascular reactivity and calcium sensitivity through RhoA. J Surg Res 2014; 186:304-9. [DOI: 10.1016/j.jss.2013.08.017] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2013] [Revised: 08/14/2013] [Accepted: 08/16/2013] [Indexed: 01/27/2023]
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Chen B, Mutschler M, Yuan Y, Neugebauer E, Huang Q, Maegele M. Superimposed traumatic brain injury modulates vasomotor responses in third-order vessels after hemorrhagic shock. Scand J Trauma Resusc Emerg Med 2013; 21:77. [PMID: 24257108 PMCID: PMC3843561 DOI: 10.1186/1757-7241-21-77] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2013] [Accepted: 11/18/2013] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Traumatic brain injury (TBI) and hemorrhagic shock (HS) are the leading causes of death in trauma. Recent studies suggest that TBI may influence physiological responses to acute blood loss. This study was designed to assess to what extent superimposed TBI may modulate physiologic vasomotor responses in third-order blood vessels in the context of HS. METHODS We have combined two established experimental models of pressure-controlled hemorrhagic shock (HS; MAP 50 mmHg/60 min) and TBI (lateral fluid percussion (LFP)) to assess vasomotor responses and microcirculatory changes in third-order vessels by intravital microscopy in a spinotrapezius muscle preparation. 23 male Sprague-Dawley rats (260-320 g) were randomly assigned to experimental groups: i) Sham, ii) HS, iii) TBI + HS, subjected to impact or sham operation, and assessed. RESULTS HS led to a significant decrease in arteriolar diameters by 20% to baseline (p < 0.01). In TBI + HS this vasoconstriction was less pronounced (5%, non-significant). At completed and at 60 minutes of resuscitation arteriolar diameters had recovered to pre-injury baseline values. Assessment of venular diameters revealed similar results. Arteriolar and venular RBC velocity and blood flow decreased sharply to < 20% of baseline in HS and TBI + HS (p < 0.01). Immediately after and at 60 minutes of resuscitation, an overshoot in arterial RBC velocity (140% of baseline) and blood flow (134.2%) was observed in TBI + HS. CONCLUSION Superimposed TBI modulated arteriolar and venular responses to HS in third-order vessels in a spinotrapezius muscle preparation. Further research is necessary to precisely define the role of TBI on the microcirculation in tissues vulnerable to HS.
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Affiliation(s)
| | | | | | | | - Qiaobing Huang
- Department of Pathophysiology, Key Laboratory for Shock and Microcirculation Research, Southern Medical University (SMU), Tong He, 510515 Guangzhou, People's Republic of China.
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Zhao ZG, Wei YL, Niu CY, Zhang YP, Zhang LM, Jiang LN. Role of protein kinase G on the post-shock mesenteric lymph blockage ameliorating vascular calcium sensitivity. Acta Cir Bras 2013; 28:537-42. [DOI: 10.1590/s0102-86502013000700010] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2013] [Accepted: 06/24/2013] [Indexed: 11/22/2022] Open
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Zhang Y, Niu C, Zhao Z, Zhang L, Si Y. Myosin light chain kinase is necessary for post-shock mesenteric lymph drainage enhancement of vascular reactivity and calcium sensitivity in hemorrhagic-shocked rats. Braz J Med Biol Res 2013; 46:574-9. [PMID: 23903684 PMCID: PMC3859335 DOI: 10.1590/1414-431x20132900] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2012] [Accepted: 05/28/2013] [Indexed: 11/22/2022] Open
Abstract
Vascular hyporeactivity is an important factor in irreversible shock, and
post-shock mesenteric lymph (PSML) blockade improves vascular reactivity after
hemorrhagic shock. This study explored the possible involvement of myosin light
chain kinase (MLCK) in PSML-mediated vascular hyporeactivity and calcium
desensitization. Rats were divided into sham (n=12), shock (n=18), and
shock+drainage (n=18) groups. A hemorrhagic shock model (40±2 mmHg, 3 h) was
established in the shock and shock+drainage groups. PSML drainage was performed
from 1 to 3 h from start of hypotension in shock+drainage rats. Levels of
phospho-MLCK (p-MLCK) were determined in superior mesenteric artery (SMA)
tissue, and the vascular reactivity to norepinephrine (NE) and sensitivity to
Ca2+ were observed in SMA rings in an isolated organ perfusion
system. p-MLCK was significantly decreased in the shock group compared with the
sham group, but increased in the shock+drainage group compared with the shock
group. Substance P (1 nM), an agonist of MLCK, significantly elevated the
decreased contractile response of SMA rings to both NE and Ca2+ at
various concentrations. Maximum contractility (Emax) in the shock
group increased with NE (from 0.179±0.038 to 0.440±0.177 g/mg, P<0.05) and
Ca2+ (from 0.515±0.043 to 0.646±0.096 g/mg, P<0.05). ML-7 (0.1
nM), an inhibitor of MLCK, reduced the increased vascular response to NE and
Ca2+ at various concentrations in the shock+drainage group (from
0.744±0.187 to 0.570±0.143 g/mg in Emax for NE and from 0.729±0.037
to 0.645±0.056 g/mg in Emax for Ca2+, P<0.05). We
conclude that MLCK is an important contributor to PSML drainage, enhancing
vascular reactivity and calcium sensitivity in rats with hemorrhagic shock.
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Affiliation(s)
- Y.P. Zhang
- Institute of Microcirculation, Hebei North University, China
| | - C.Y. Niu
- Institute of Microcirculation, Hebei North University, China
| | - Z.G. Zhao
- Institute of Microcirculation, Hebei North University, China
| | - L.M. Zhang
- Institute of Microcirculation, Hebei North University, China
| | - Y.H. Si
- Institute of Microcirculation, Hebei North University, China
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Wang X, Song R, Chen Y, Zhao M, Zhao KS. Polydatin – a new mitochondria protector for acute severe hemorrhagic shock treatment. Expert Opin Investig Drugs 2012; 22:169-79. [DOI: 10.1517/13543784.2013.748033] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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Wang X, Song R, Bian HN, Brunk UT, Zhao M, Zhao KS. Polydatin, a natural polyphenol, protects arterial smooth muscle cells against mitochondrial dysfunction and lysosomal destabilization following hemorrhagic shock. Am J Physiol Regul Integr Comp Physiol 2012; 302:R805-14. [PMID: 22277937 DOI: 10.1152/ajpregu.00350.2011] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The main objective of this study was to investigate the activity of polydatin on mitochondrial dysfunction and lysosomal stability of arteriolar smooth muscle cells (ASMCs) in severe shock. The experimental animals (rats) were divided into five groups: control, hemorrhagic shock, shock + CsA, shock + Res, and shock + PD (exposed to cyclosporin A, resveratrol, or polydatin following induction of hemorrhagic shock, respectively). The calcein-Co(2+) technique revealed opening of ASMC mitochondrial permeability transition pores (mPTP) after shock with resulting mitochondrial swelling, decreased mitochondrial membrane potential (ΔΨm), and reduced intracellular ATP levels. These alterations were all inhibited by exposure to PD, which was significantly more effective than CsA and Res. PD also preserved lysosomal stability, suppressed activation of K(ATP) channels, ASMC hyperpolarization, and reduced vasoresponsiveness to norepinephrine that normally follows severe shock. The results demonstrate that exposure to PD after initiation of severe shock effectively preserves ASMC mitochondrial integrity and has a significant therapeutic effect in severe shock. The effects may partially result from lysosomal stabilization against shock-induced oxidative stress and depressed relocation of hydrolytic enzymes and redox-active lysosomal iron that, in turn, may induce mPTP opening.
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Affiliation(s)
- Xingmin Wang
- Guangdong Key Laboratory of Shock and Microcirculation Research, Dept. of Pathophysiology, Southern Medical Univ., Guangzhou, P. R. China
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Xue JH, Chen LH, Zhao HZ, Pu YD, Feng HZ, Ma YG, Ma J, Chang YM, Zhang ZM, Xie MJ. Differential regulation and recovery of intracellular Ca2+ in cerebral and small mesenteric arterial smooth muscle cells of simulated microgravity rat. PLoS One 2011; 6:e19775. [PMID: 21611118 PMCID: PMC3097196 DOI: 10.1371/journal.pone.0019775] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2010] [Accepted: 04/05/2011] [Indexed: 01/15/2023] Open
Abstract
Background The differential adaptations of cerebrovasculature and small mesenteric arteries could be one of critical factors in postspaceflight orthostatic intolerance, but the cellular mechanisms remain unknown. We hypothesize that there is a differential regulation of intracellular Ca2+ determined by the alterations in the functions of plasma membrane CaL channels and ryanodine-sensitive Ca2+ releases from sarcoplasmic reticulum (SR) in cerebral and small mesenteric vascular smooth muscle cells (VSMCs) of simulated microgravity rats, respectively. Methodology/Principal Findings Sprague-Dawley rats were subjected to 28-day hindlimb unweighting to simulate microgravity. In addition, tail-suspended rats were submitted to a recovery period of 3 or 7 days after removal of suspension. The function of CaL channels was evaluated by patch clamp and Western blotting. The function of ryanodine-sensitive Ca2+ releases in response to caffeine were assessed by a laser confocal microscope. Our results indicated that simulated microgravity increased the functions of CaL channels and ryanodine-sensitive Ca2+ releases in cerebral VSMCs, whereas, simulated microgravity decreased the functions of CaL channels and ryanodine-sensitive Ca2+ releases in small mesenteric VSMCs. In addition, 3- or 7-day recovery after removal of suspension could restore the functions of CaL channels and ryanodine-sensitive Ca2+ releases to their control levels in cerebral and small mesenteric VSMCs, respectively. Conclusions The differential regulation of CaL channels and ryanodine-sensitive Ca2+ releases in cerebral and small mesenteric VSMCs may be responsible for the differential regulation of intracellular Ca2+, which leads to the altered autoregulation of cerebral vasculature and the inability to adequately elevate peripheral vascular resistance in postspaceflight orthostatic intolerance.
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Affiliation(s)
- Jun-Hui Xue
- Department of Aerospace Clinical Medicine, Key Laboratory of Aerospace Medicine of Ministry of Education, Fourth Military Medical University, Xi'an, Shaanxi Province, China
| | - Lian-Hong Chen
- Department of Chest Surgery, Tangdu Hospital of Fourth Military Medical University, Xi'an, Shaanxi Province, China
| | - Hua-Zhou Zhao
- 309 Clinical Divisions, Department of General Surgery, General Hospital of PLA, Beijing, China
| | - Yong-Dong Pu
- 309 Clinical Divisions, Department of General Surgery, General Hospital of PLA, Beijing, China
| | - Han-Zhong Feng
- Department of Aerospace Physiology, Key Laboratory of Aerospace Medicine of Ministry of Education, Fourth Military Medical University, Xi'an, Shaanxi Province, China
| | - Yu-Guang Ma
- Department of Aerospace Physiology, Key Laboratory of Aerospace Medicine of Ministry of Education, Fourth Military Medical University, Xi'an, Shaanxi Province, China
| | - Jin Ma
- Department of Aerospace Physiology, Key Laboratory of Aerospace Medicine of Ministry of Education, Fourth Military Medical University, Xi'an, Shaanxi Province, China
| | - Yao-Ming Chang
- Department of Aerospace Clinical Medicine, Key Laboratory of Aerospace Medicine of Ministry of Education, Fourth Military Medical University, Xi'an, Shaanxi Province, China
- Department of Aerospace Physiology, Key Laboratory of Aerospace Medicine of Ministry of Education, Fourth Military Medical University, Xi'an, Shaanxi Province, China
| | - Zuo-Ming Zhang
- Department of Aerospace Clinical Medicine, Key Laboratory of Aerospace Medicine of Ministry of Education, Fourth Military Medical University, Xi'an, Shaanxi Province, China
- * E-mail: (Z-MZ); (M-JX)
| | - Man-Jiang Xie
- Department of Aerospace Physiology, Key Laboratory of Aerospace Medicine of Ministry of Education, Fourth Military Medical University, Xi'an, Shaanxi Province, China
- * E-mail: (Z-MZ); (M-JX)
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Mitochondrial injury underlies hyporeactivity of arterial smooth muscle in severe shock. Am J Hypertens 2011; 24:45-51. [PMID: 20940715 DOI: 10.1038/ajh.2010.184] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
Abstract
BACKGROUND Our previous data showed membrane hyperpolarization of arteriolar smooth muscle cells (ASMCs) caused by adenosine triphosphate (ATP)-sensitive potassium channels (K(ATP)) activation contributed to vascular hyporeactivity in shock. Despite supply of oxygen and nutrients, vascular hyporeactivity to vasoconstrictor agents still remains, which may result from low ATP level. The study was designed to investigate shock-induced mitochondrial changes of rat ASMCs in the genesis and treatment of hypotension in severe shock. METHODS The animals were divided into four groups: controls, hemorrhagic shock, CsA+shock (preadministration of cyclosporin A before bleeding), and ATR+CsA+shock (preadministration of atractyloside, followed by CsA and bleeding). ASMCs were isolated and the ultrastructure and function of ASMC mitochondria and the vasoresponsiveness to norepinephrine (NE) was measured on microcirculatory preparations. RESULTS Ultrastructurally, the hemorrhagic shock group showed swollen mitochondria with poorly defined cristae. In this group, the number of ASMCs with low mitochondrial membrane potential (Δψ(m)) was increased by 49.7%, and the intracellular ATP level was reduced by 82.1%, which led to activation of K(ATP) plasma membrane channels with resultant ASMC hyperpolarization and low vasoreactivity. These changes were reduced in the CsA+shock group. When mitochondrial damage was aggravated by ATR in the ATR+CsA+shock group, the CsA did not protect. Compared to the shock group, vasoresponsiveness to NE was much improved in the CsA+shock group. CONCLUSIONS Mitochondrial ASMC dysfunction is involved in the genesis of reduced vasoreactivity in severe shock. Mitochondrial protection may therefore be a new approach in the treatment of shock-induced hypotension.
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ICS Medal Winners and Research Abstract Presentations. J Intensive Care Soc 2008. [DOI: 10.1177/175114370800900123] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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WHAT'S NEW IN SHOCK, DECEMBER 2007? Shock 2007. [DOI: 10.1097/shk.0b013e31815a3d84] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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