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Zhao YJ, Liu Y, Wang J, Li Q, Zhang ZM, Tu T, Lei R, Zhang M, Chen YJ. Activation of the Mesencephalic Trigeminal Nucleus Contributes to Masseter Hyperactivity Induced by Chronic Restraint Stress. Front Cell Neurosci 2022; 16:841133. [PMID: 35480958 PMCID: PMC9035558 DOI: 10.3389/fncel.2022.841133] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2021] [Accepted: 03/11/2022] [Indexed: 12/12/2022] Open
Abstract
Psychological stress is commonly accepted to be closely associated with masticatory muscle disorder, which is the main symptom of temporomandibular disorder (TMD). Previous studies have confirmed that exposure to stress may cause masticatory muscle hyperactivity. However, the central mechanism underlying this process remains unclear. The mesencephalic trigeminal nucleus (Vme), which resides in the brainstem, is the primary afferent center for masticatory proprioception and plays a key role in oral–motor movements by projecting to the trigeminal motor nucleus (Vmo). Therefore, the present study was designed to examine the role of Vme neurons in masseter overactivity induced by chronic stress. We found that subjecting mice to restraint stress (6 h/day) for 14 days caused significant anxiety-like behavior, obvious masseter overactivity, and markedly enhanced electrophysiological excitability of Vme neurons. By using anterograde tract tracing combined with immunofluorescence staining methods, we observed vesicular glutamate transporter 1 (VGLUT1)-positive glutamatergic projections from the Vme to the Vmo. Moreover, chronic restraint stress (CRS) elevated the expression of VGLUT1 and choline acetyltransferase (ChAT) in Vmo. Furthermore, administration of VGLUT1-targeted short hairpin RNA (shRNA) into the bilateral Vme significantly suppressed the enhanced overexcitability of Vme neurons, downregulated the overexpression of VGLUT1 and ChAT in the Vmo, and attenuated the elevated overactivity of the masseter caused by CRS. Taken together, we showed that CRS can excite neurons in the Vme, enhancing glutamatergic excitatory projections from the Vme to the Vmo and resulting in masseter muscle overactivity. These findings provide us with a novel central mechanism underlying the correlation between psychological factors and TMD.
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Affiliation(s)
- Ya-Juan Zhao
- State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi International Joint Research Center for Oral Diseases, Department of General Dentistry and Emergency, School of Stomatology, Fourth Military Medical University, Xi’an, China
| | - Yang Liu
- State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi International Joint Research Center for Oral Diseases, Department of General Dentistry and Emergency, School of Stomatology, Fourth Military Medical University, Xi’an, China
| | - Jian Wang
- Department of Cardiothoracic Surgery, General Hospital of Western Theater Command, Chengdu, China
| | - Qiang Li
- State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi International Joint Research Center for Oral Diseases, Department of General Dentistry and Emergency, School of Stomatology, Fourth Military Medical University, Xi’an, China
| | - Zhou-Ming Zhang
- State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi International Joint Research Center for Oral Diseases, Department of General Dentistry and Emergency, School of Stomatology, Fourth Military Medical University, Xi’an, China
| | - Teng Tu
- State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi International Joint Research Center for Oral Diseases, Department of General Dentistry and Emergency, School of Stomatology, Fourth Military Medical University, Xi’an, China
| | - Rong Lei
- State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi International Joint Research Center for Oral Diseases, Department of General Dentistry and Emergency, School of Stomatology, Fourth Military Medical University, Xi’an, China
| | - Min Zhang
- State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi International Joint Research Center for Oral Diseases, Department of General Dentistry and Emergency, School of Stomatology, Fourth Military Medical University, Xi’an, China
- Min Zhang,
| | - Yong-Jin Chen
- State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi International Joint Research Center for Oral Diseases, Department of General Dentistry and Emergency, School of Stomatology, Fourth Military Medical University, Xi’an, China
- *Correspondence: Yong-Jin Chen,
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Lin W, Zhao Y, Cheng B, Zhao H, Miao L, Li Q, Chen Y, Zhang M. NMDAR and JNK Activation in the Spinal Trigeminal Nucleus Caudalis Contributes to Masseter Hyperalgesia Induced by Stress. Front Cell Neurosci 2019; 13:495. [PMID: 31798413 PMCID: PMC6868050 DOI: 10.3389/fncel.2019.00495] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2019] [Accepted: 10/21/2019] [Indexed: 02/03/2023] Open
Abstract
It is commonly accepted that psychological stress is closely associated with the occurrence and development of chronic orofacial pain. However, the pathogenesis underlying this process has not been fully elucidated. In the present study, we explored the role of N-methyl-D-aspartate receptors (NMDARs) and Jun N-terminal kinase (JNK) mediated intercellular communication between neurons and astrocytes in the spinal trigeminal nucleus caudalis (Vc) in the induction of masseter hyperalgesia by psychological stress in rats. We found that subjecting rats to 14 days of restraint stress (8 h/d) caused a significant decrease in body weight gain, behavioral changes and marked masseter hyperalgesia in the rats. We also found that exposure to restraint stress for 14 days caused the expression of pJNK in astrocytes in the Vc to significantly increase, and intrathecally infusing a JNK inhibitor significantly prevented restraint stress-induced masseter hyperalgesia in the rats. In addition, after exposure to restraint stress for 14 days, the stressed group exhibited a noticeably increased expression level of pNR2B in neurons in the Vc. Then, we intrathecally injected MK-801 (an NMDAR inhibitor) and ifenprodil (a selective NR2B subunit antagonist) and observed that the two types of inhibitors not only alleviated masseter hyperalgesia but also significantly inhibited the phosphorylation of JNK in the Vc after restraint stress; this indicates that the effect of NMDAR antagonists may influence the activation of astrocytic JNK. Furthermore, inhibitors of neuronal nitric oxide synthase (nNOS) activation and guanylate cyclase (GC) inhibitor could not only inhibit the expression of pJNK in the Vc, but also effectively alleviate masseter hyperalgesia induced by restraint stress. Taken together, our results suggest that NMDAR activation could increase JNK phosphorylation in astrocytes after restraint stress, which may depend on the nNOS-GC pathway. The intercellular communication between neurons and astrocytes in the Vc may play a key role in the induction of masseter muscle hyperalgesia by psychological stress in rats.
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Affiliation(s)
- Wenqing Lin
- State Key Laboratory of Military Stomatology, Department of General Dentistry and Emergency, National Clinical Research Center for Oral Diseases, Shaanxi International Joint Research Center for Oral Diseases, School of Stomatology, Fourth Military Medical University, Xi'an, China
| | - Yajuan Zhao
- Department of Stomatology, Air Force Medical Center, Beijing, China
| | - Baixiang Cheng
- State Key Laboratory of Military Stomatology, Department of General Dentistry and Emergency, National Clinical Research Center for Oral Diseases, Shaanxi International Joint Research Center for Oral Diseases, School of Stomatology, Fourth Military Medical University, Xi'an, China
| | - Haidan Zhao
- State Key Laboratory of Military Stomatology, Department of General Dentistry and Emergency, National Clinical Research Center for Oral Diseases, Shaanxi International Joint Research Center for Oral Diseases, School of Stomatology, Fourth Military Medical University, Xi'an, China
| | - Li Miao
- State Key Laboratory of Military Stomatology, Department of General Dentistry and Emergency, National Clinical Research Center for Oral Diseases, Shaanxi International Joint Research Center for Oral Diseases, School of Stomatology, Fourth Military Medical University, Xi'an, China
| | - Qiang Li
- State Key Laboratory of Military Stomatology, Department of General Dentistry and Emergency, National Clinical Research Center for Oral Diseases, Shaanxi International Joint Research Center for Oral Diseases, School of Stomatology, Fourth Military Medical University, Xi'an, China
| | - Yongjin Chen
- State Key Laboratory of Military Stomatology, Department of General Dentistry and Emergency, National Clinical Research Center for Oral Diseases, Shaanxi International Joint Research Center for Oral Diseases, School of Stomatology, Fourth Military Medical University, Xi'an, China
| | - Min Zhang
- State Key Laboratory of Military Stomatology, Department of General Dentistry and Emergency, National Clinical Research Center for Oral Diseases, Shaanxi International Joint Research Center for Oral Diseases, School of Stomatology, Fourth Military Medical University, Xi'an, China
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Yuan M, Custaud MA, Xu Z, Wang J, Yuan M, Tafforin C, Treffel L, Arbeille P, Nicolas M, Gharib C, Gauquelin-Koch G, Arnaud L, Lloret JC, Li Y, Navasiolava N. Multi-System Adaptation to Confinement During the 180-Day Controlled Ecological Life Support System (CELSS) Experiment. Front Physiol 2019; 10:575. [PMID: 31164833 PMCID: PMC6536695 DOI: 10.3389/fphys.2019.00575] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2019] [Accepted: 04/24/2019] [Indexed: 02/01/2023] Open
Abstract
Confinement experiments are essential to prepare long-term space exploration. The 180-day Chinese CELSS (Controlled Ecological Life Support System) study is unique in its design, including a closed-loop system and mid-mission simulation of Mars-like day-night cycle of 24 h 40 min for 36 days (days 72-108). Our aim was to study physiological and psychological consequences of this confinement in four healthy volunteers (one female). CELSS platform consisted of six interconnected modules including four greenhouses. Life support systems were controlled automatically. Body composition, fluid compartments, metabolic state, heart, large vessels, endothelial function, and muscle tone were studied using biological, functional, and/or morphological measurements. Behavioral activities were studied by ethological monitoring; psychological state was assessed by questionnaires. Body weight decreased by ∼2 kg mostly due to lean mass loss. Plasma volume and volume-regulating hormones were mostly stable. Carotid intima-media thickness (IMT) increased by 10-15%. Endothelium-dependent vasodilation decreased. Masseter tone increased by 6-14% suggesting stress, whereas paravertebral muscle tone diminished by 10 ± 6%. Behavioral flow reflecting global activity decreased 1.5- to 2-fold after the first month. Psychological questionnaires revealed decrease in hostility and negative emotions but increase in emotional adaptation suggesting boredom and monotony. One subject was clearly different with lower fitness, higher levels of stress and anxiety, and somatic signs as back pain, peak in masseter tone, increased blood cortisol and C-reactive protein. Comparison of CELSS experiment with Mars500 confinement program suggests the need for countermeasures to prevent increased IMT and endothelial deconditioning. Daily activity in greenhouse could act as countermeasure against psycho-physiological deconditioning.
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Affiliation(s)
- Ming Yuan
- State Key Laboratory of Space Medicine Fundamentals and Application, China Astronaut Research and Training Center, Beijing, China
- Space Institute of Southern China, Shenzhen, China
| | - Marc-Antoine Custaud
- Centre de Recherche Clinique, Centre Hospitalier Universitaire d’Angers, Angers, France
- MitoVasc UMR INSERM 1083-CNRS 6015, Université d’Angers, Angers, France
| | - Zi Xu
- Space Institute of Southern China, Shenzhen, China
| | - Jingyu Wang
- State Key Laboratory of Space Medicine Fundamentals and Application, China Astronaut Research and Training Center, Beijing, China
| | - Min Yuan
- State Key Laboratory of Space Medicine Fundamentals and Application, China Astronaut Research and Training Center, Beijing, China
| | - Carole Tafforin
- Research and Study Group in Human and Space Ethology, Ethospace, Toulouse, France
| | - Loïc Treffel
- Institut Toulousain d’Ostéopathie, Toulouse, France
- Centre de Recherche International en Biomécanique, Lagarde, France
| | - Philippe Arbeille
- Faculté de Médecine, Unité de Médecine et Physiologie Spatiales, Centre Hospitalier Universitaire Trousseau de Tours, Tours, France
| | - Michel Nicolas
- Laboratory of Psychology Psy-DREPI (EA 7458), Sport Sciences Department, University Bourgogne Franche-Comté, Dijon, France
| | - Claude Gharib
- Institut NeuroMyogène, Université Claude Bernard Lyon 1, Lyon, France
| | | | | | | | - Yinghui Li
- State Key Laboratory of Space Medicine Fundamentals and Application, China Astronaut Research and Training Center, Beijing, China
| | - Nastassia Navasiolava
- Centre de Recherche Clinique, Centre Hospitalier Universitaire d’Angers, Angers, France
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Wei F, Van Horn MH, Coombs MC, She X, Gonzales TS, Gonzalez YM, Scott JM, Iwasaki LR, Nickel JC, Yao H. A pilot study of nocturnal temporalis muscle activity in TMD diagnostic groups of women. J Oral Rehabil 2017; 44:517-525. [PMID: 28449265 DOI: 10.1111/joor.12517] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/22/2017] [Indexed: 01/28/2023]
Abstract
Temporomandibular disorder (TMD) incidences are believed to be related to parafunctional behaviours like teeth clenching. This pilot study aimed to (i) develop an automated clench-detection algorithm, and (ii) apply the algorithm to test for differences in nocturnal clenching in women with and without TMD. Subjects gave informed consent to participate. Adult women were categorised using Diagnostic Criteria for TMD according to presence/absence (+/-) of both TM joint disc placement (DD) and chronic pain (P) into two groups (+DD+P, -DD-P) with 12 subjects each. Surface temporalis electromyography was recorded during oral tasks performed by subjects at two laboratory sessions. The data were used to characterise muscle activity per N of bite force (μV/N) for each subject, develop the clench-detection algorithm and test its accuracy. Ambulatory surface temporalis electromyography was self-recorded by each subject over three nights and analysed using the algorithm and bite force (N) versus muscle activity μV/N calibrations. Bonferroni-adjusted homoscedastic t-tests assessed for significant between-group differences in clenching (P < 0·05). Sensitivity, specificity and accuracy of algorithm-detected laboratory clenches were all ≥96%. During self-recordings 95% of clenches had durations of <4 s and peak forces of <10 N in both groups. Mean clench durations were significantly longer (P = 0·042) in +DD+P (1·9 ± 0·8 s) than -DD-P subjects (1·4 ± 0·4 s). Mean temporalis duty factors (%clench time/total recording time) were significantly larger (P = 0·041) in +DD+P (0·47 ± 0·34%) than -DD-P (0·26 ±0·22%) subjects. Nocturnal temporalis muscle activities detected by a validated algorithm were longer per clench and recording time in +DD+P compared to -DD-P women.
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Affiliation(s)
- F Wei
- Department of Bioengineering, Clemson University, Clemson, SC, USA
| | - M H Van Horn
- Department of Bioengineering, Clemson University, Clemson, SC, USA
| | - M C Coombs
- Department of Bioengineering, Clemson University, Clemson, SC, USA.,Department of Oral Health Sciences, College of Dental Medicine, Medical University of South Carolina, Charleston, SC, USA
| | - X She
- Department of Bioengineering, Clemson University, Clemson, SC, USA
| | - T S Gonzales
- Department of Oral Health Sciences, College of Dental Medicine, Medical University of South Carolina, Charleston, SC, USA
| | - Y M Gonzalez
- Department of Oral Diagnostic Sciences, School of Dental Medicine, University at Buffalo, Buffalo, NY, USA
| | - J M Scott
- Department of Research and Graduate Programs, School of Dentistry, University of Missouri-Kansas City, Kansas City, MO, USA
| | - L R Iwasaki
- Department of Oral Diagnostic Sciences, School of Dental Medicine, University at Buffalo, Buffalo, NY, USA.,Departments of Orthodontics and Dentofacial Orthopedics, and Oral and Craniofacial Sciences, School of Dentistry, University of Missouri-Kansas City, Kansas City, MO, USA
| | - J C Nickel
- Department of Oral Diagnostic Sciences, School of Dental Medicine, University at Buffalo, Buffalo, NY, USA.,Departments of Orthodontics and Dentofacial Orthopedics, and Oral and Craniofacial Sciences, School of Dentistry, University of Missouri-Kansas City, Kansas City, MO, USA
| | - H Yao
- Department of Bioengineering, Clemson University, Clemson, SC, USA.,Department of Oral Health Sciences, College of Dental Medicine, Medical University of South Carolina, Charleston, SC, USA
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Izadpanah F, Arab F, Zarghami A, Bijani A, Kazemi S, Moghadamnia AA. The effect of lamotrigine on learning in mice using the passive avoidance model. Epilepsy Behav 2017; 69:1-6. [PMID: 28213162 DOI: 10.1016/j.yebeh.2016.11.036] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/05/2016] [Revised: 11/19/2016] [Accepted: 11/21/2016] [Indexed: 01/08/2023]
Abstract
INTRODUCTION Lamotrigine (LTG) is an antiepileptic drug that inhibits the release of glutamate by blocking sodium channels. The present study was conducted to evaluate the effect of LTG in different stages of memory using a passive avoidance learning task in mice. METHODS Male albino mice in the weight range 20-25g were used. They were divided into four groups (control group and three groups receiving various doses of LTG). LTG was given in three doses of 10, 25, and 50mg/kg as intraperitoneal (IP) injections. The doses of LTG were used in three injection groups: before acquisition, after consolidation, and before retrieval at 24h. The retention latency times in each group were recorded using a step-through passive avoidance task 24h and one week after consolidation. RESULTS Retention latency in the group receiving a high dose of LTG (25mg/kg) after one week was significantly increased in comparison to the group receiving a low dose of LTG (10mg/kg) (267±49.96 vs. 198.87±57.22, P=0.015). With injection of LTG after consolidation, the retention latency times were increased in all doses after a one-week retrieval compared to the control (P=0.023). Kaplan-Mayer surveillance analysis also showed significant differences in the latencies of the LTG-receiving group after 24h and one week's retrieval (P=0.041). Administration of LTG before retrieval at 24h showed a significant difference in retention latency time, which was increased for two doses of LTG (10 and 50mg/kg) after one week (203.5±63.67 vs. 270.25±19.78, P=0.024). CONCLUSION LTG at higher doses may facilitate the learning process in mice and appears to improve memory function at different stages.
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Affiliation(s)
- Fatemeh Izadpanah
- Department of Pharmacology, Babol University of Medical Sciences, Babol, Iran
| | - Fatemeh Arab
- Department of Pharmacology, Babol University of Medical Sciences, Babol, Iran
| | - Amin Zarghami
- Department of Pharmacology, Babol University of Medical Sciences, Babol, Iran
| | - Ali Bijani
- Social Determinant of Health Research Center, Health Research Institute, Babol University of Medical Sciences, Babol, Iran
| | - Sohrab Kazemi
- Neuroscience Research Center, Department of Pharmacology, Faculty of Medicine, Babol University of Medical Sciences, Babol, Iran; Cellular and Molecular Biology Research Center, Health Research Center, Babol University of Medical Sciences, Babol, Iran
| | - Ali Akbar Moghadamnia
- Department of Pharmacology, Babol University of Medical Sciences, Babol, Iran; Neuroscience Research Center, Department of Pharmacology, Faculty of Medicine, Babol University of Medical Sciences, Babol, Iran.
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Zhao YJ, Liu Y, Zhao YH, Li Q, Zhang M, Chen YJ. Activation of satellite glial cells in the trigeminal ganglion contributes to masseter mechanical allodynia induced by restraint stress in rats. Neurosci Lett 2015; 602:150-5. [PMID: 26135545 DOI: 10.1016/j.neulet.2015.06.048] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2015] [Revised: 06/23/2015] [Accepted: 06/24/2015] [Indexed: 11/21/2022]
Abstract
It is commonly accepted that psychological stress contributes to the development of chronic orofacial pain. However, the neural mechanism underlying this process has remained unclear. The present study was performed to determine the involvement of satellite glia cells (SGCs) in the trigeminal ganglion (TG) in stress-induced increases in masseter muscle allodynia in rats. Using a chronic restraint stress model, we found that exposure to a 14-day stress but not a 3-day stress (6 h/day) caused decreased body weight gain, behavioral changes and marked masseter allodynia in rats. SGCs were dramatically activated, and substance P (SP) expression was significantly increased in the TG. A further analysis was undertaken to investigate the contribution of SGCs; the expression of interleukin-1β (IL-1β) in SGCs and interleukin-1 receptor I (IL-1RI) in neurons was significantly increased after chronic restraint stress, whereas injection of L-α-aminoadipate (a SGC inhibitor, LAA) into the TG dramatically inhibited the overexpression of these proteins. In addition, LAA or interleukin-1 receptor antagonist (IL-1ra) administration into the TG could significantly attenuate the mechanical masseter allodynia and overexpression of SP in the TG induced by restraint stress. These results suggest that SGC activation in the TG may play a role in masseter allodynia induced by restraint stress. The over-release of IL-1β and excessive IL1-RI expressions have close relationship with the stress induced masseter allodynia.
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