1
|
Maeda-Iino A, Fukushima M, Sakoguchi Y, Omure H, Oishi A, Oga Y, Furukawa-Sainoki M, Kanmura S, Ido A, Miyawaki S. Effects of intra-oesophageal acid infusion and a stress task on masseter muscle activity and autonomic nervous activity in wakefulness. J Oral Rehabil 2020; 47:567-576. [PMID: 32064657 DOI: 10.1111/joor.12947] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2019] [Revised: 01/27/2020] [Accepted: 02/09/2020] [Indexed: 11/30/2022]
Abstract
BACKGROUND Gastroesophageal reflux disease may be an important risk factor for awake bruxism. Additionally, it has been known that a psychological stress task affects masseter muscle activity, and autonomic nervous system (ANS) activity modulation induces masseter muscle activity. OBJECTIVES This study aimed to investigate whether task-induced stress and experimental oesophageal acid infusion increase masseter muscle activity and alter ANS activity, compared to rest task and oesophageal saline infusion, respectively. METHODS Polygraphic monitoring, consisting of electromyography of the masseter muscle and electrocardiography, was performed in 12 healthy adult men during 30-min interventions with intra-oesophageal saline or acid infusion, while reading a book quietly, as rest, and while performing calculation, as a stress task. RESULTS At rest, masseter muscle activity and parasympathetic nervous system (PNS) activity during acid infusion were significantly higher (P = .019) and lower (P = .021) than during saline infusion, respectively. During saline infusion, both masseter muscle activity and sympathetic nervous system (SNS) activity or PNS activity while performing the calculation task were higher (P = .022 and .012, respectively) or lower (P = .007) than those during the reading task, respectively. In two-way repeated-measures ANOVA, intra-oesophageal infusion (saline or acid) significantly affected masseter muscle activity (P = .008) and PNS activity (P = .021). However, performing tasks (reading or calculation) significantly affected only PNS activity (P = .028). CONCLUSION Intra-oesophageal acid infusion significantly increased masseter muscle activity and decreased PNS activity. In contrast, stress task not only significantly decreased PNS activity, but only modestly increased masseter muscle activity and SNS activity.
Collapse
Affiliation(s)
- Aya Maeda-Iino
- Field of Developmental Medicine, Health Research Course, Department of Orthodontics and Dentofacial Orthopedics, Graduate School of Medical and Dental Sciences, Kagoshima University, Kagoshima, Japan
| | - Mika Fukushima
- Field of Developmental Medicine, Health Research Course, Department of Orthodontics and Dentofacial Orthopedics, Graduate School of Medical and Dental Sciences, Kagoshima University, Kagoshima, Japan
| | - Yoko Sakoguchi
- Field of Developmental Medicine, Health Research Course, Department of Orthodontics and Dentofacial Orthopedics, Graduate School of Medical and Dental Sciences, Kagoshima University, Kagoshima, Japan.,Sakoguchi Dental Clinic, Kagoshima, Japan
| | - Haruhito Omure
- Field of Developmental Medicine, Health Research Course, Department of Orthodontics and Dentofacial Orthopedics, Graduate School of Medical and Dental Sciences, Kagoshima University, Kagoshima, Japan.,Omure Orthodontic Clinic, Matsuyama, Japan
| | - Akihito Oishi
- Field of Developmental Medicine, Health Research Course, Department of Orthodontics and Dentofacial Orthopedics, Graduate School of Medical and Dental Sciences, Kagoshima University, Kagoshima, Japan
| | - Yasuhiko Oga
- Field of Developmental Medicine, Health Research Course, Department of Orthodontics and Dentofacial Orthopedics, Graduate School of Medical and Dental Sciences, Kagoshima University, Kagoshima, Japan
| | - Minami Furukawa-Sainoki
- Field of Developmental Medicine, Health Research Course, Department of Orthodontics and Dentofacial Orthopedics, Graduate School of Medical and Dental Sciences, Kagoshima University, Kagoshima, Japan
| | - Shuji Kanmura
- Department of Endoscopy, Kagoshima University Hospital, Kagoshima, Japan
| | - Akio Ido
- Digestive and Lifestyle Diseases, Department of Human and Environmental Sciences, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima, Japan
| | - Shouichi Miyawaki
- Field of Developmental Medicine, Health Research Course, Department of Orthodontics and Dentofacial Orthopedics, Graduate School of Medical and Dental Sciences, Kagoshima University, Kagoshima, Japan.,Faculty of Dental Medicine, Airlangga University, Surabaya, Indonesia
| |
Collapse
|
3
|
Abstract
PURPOSE To investigate gene and protein expression profiles of neural receptors found in the mouse meibomian gland. RNA and protein levels were determined for neuropeptide Y (NPY) receptor, vasoactive intestinal peptide (VIP) receptor, substance P (SP) receptor, and muscarinic cholinergic receptor (mAChR) subtypes M1-M5 in the mouse meibomian gland. METHODS Frozen sections of Balb/c mouse eyelids were subjected to laser capture microdissection to isolate pure samples of meibomian gland ductal and acinar cells. Real-time polymerase chain reaction, immunolabeling, and Western blot analysis for SP receptor, VIP receptor, NPY receptor, and mAChR subtypes M1-M5 were performed on meibomian gland ductal and acinar cells. RESULTS Expression of NPY1 receptor, VIP receptor 1, SP receptor, and all 5 mAChR subtypes was found in all meibomian gland ductal and acinar cells analyzed by real-time polymerase chain reaction. Immunolabeling and Western blot analysis confirmed the presence of NPY1 receptor, VIP receptor 1, SP receptor, and all 5 mAChR subtypes in the meibomian gland. The levels were variable with the duct showing greater levels of NPY1 receptor, SP receptor, and mAChRs 1, 2, 4, and 5 than with the gland. CONCLUSIONS VIP receptor 1, SP receptor, NPY1 receptor, and mAChR subtypes may be involved in the regulation of meibomian gland secretion. Laser capture microdissection in conjunction with gene expression analysis provides an excellent approach for studying meibomian gland cells about which relatively little is known at the molecular level.
Collapse
|
5
|
Ishii H, Niioka T, Watanabe H, Izumi H. Inhibitory effects of excess sympathetic activity on parasympathetic vasodilation in the rat masseter muscle. Am J Physiol Regul Integr Comp Physiol 2007; 293:R729-36. [PMID: 17537835 DOI: 10.1152/ajpregu.00866.2006] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The present study was designed to examine the effect of sympathetic tonic activity on parasympathetic vasodilation evoked by the trigeminal-mediated reflex in the masseter muscle in urethane-anesthetized rats. Sectioning of the superior cervical sympathetic trunk (CST) ipsilaterally increased the basal level of blood flow in the masseter muscle (MBF). Electrical stimulation of the peripheral cut end of the CST for 2 min using 2-ms pulses ipsilaterally decreased in a dependent manner the intensity (0.5-10 V) and frequency (0.1-5 Hz) of the MBF. The CST stimulation for 2 min at <0.5 Hz with 5 V using 2-ms pulses seems to be comparable with the spontaneous activity in the CST fibers innervating the masseter vasculature, because this stimulation restored the basal level of the MBF to the presectioned values. Parasympathetic vasodilation evoked by electrical stimulation of the central cut end of the lingual nerve in the masseter muscle was markedly reduced by CST stimulation for 2 min with 5 V using 2-ms pulses in a frequency-dependent manner (0.5-5 Hz). Intravenous administration of phentolamine significantly reduced the vasoconstriction induced by CST stimulation in a dose-dependent manner (0.1-1 mg/kg), but pretreatment with either phentolamine or propranolol failed to affect the sympathetic inhibition of the parasympathetic vasodilation. Our results suggest that 1) excess sympathetic activity inhibits parasympathetic vasodilation in the masseter muscle, and 2) alpha- and beta-adrenoceptors do not contribute to sympathetic inhibition of parasympathetic vasodilation, and thus some other types of receptors must be involved in this response.
Collapse
Affiliation(s)
- Hisayoshi Ishii
- Department of Oral Physiology, Health Sciences University of Hokkaido, 1757 Kanazawa, Ishikari-Tobetsu, Hokkaido 061-0293, Japan
| | | | | | | |
Collapse
|
6
|
Isomura ET, Yoshitomi K, Hamaguchi M, Kogo M. Saliva Secretion Stimulated by Grafted Nerve in Submandibular Gland Allograft in Dogs. Transplantation 2007; 83:759-63. [PMID: 17414710 DOI: 10.1097/01.tp.0000258598.27904.d7] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
BACKGROUND Recent studies have described submandibular gland allografts in animal models; however, the amount of saliva secretion or nervous regeneration in those animals have not been reported. Herein, we investigated saliva secretion from submandibular gland allografts in beagle dogs. METHODS Using a vascularized submandibular gland transplantation method, we extracted portions of the submandibular gland including the duct from beagle dogs and placed them into the submental region of age- and weight-matched dogs. Differences in the amount of saliva secretion and histologic appearance were compared based on the existence of chorda tympani branches in the allograft. RESULTS At 10 weeks after transplantation, the amount of resting saliva in the group grafted with the nerve was clearly increased, whereas the quantity of that in the group that underwent transplantation without the nerve was quite low. In the former group, responses were demonstrated after taste stimulation and electronic nerve stimulation. CONCLUSIONS Our results showed a clear relationship between the presence of a nerve in grafted submandibular glands and saliva secretion.
Collapse
Affiliation(s)
- Emiko Tanaka Isomura
- First Department of Oral and Maxillofacial Surgery, Osaka University, Graduate School of Dentistry, Osaka, Japan.
| | | | | | | |
Collapse
|