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Nakaya Y, Hayashi K, Suzuki A, Asano R, Hayashi K, Fujita K, Kawabata K, Kobayashi Y, Sato M. Treatment of Intracranial Hemorrhage Induced Hemichorea- Hemiballism by Low-Frequency Repetitive Transcranial Magnetic Stimulation. Acta Neurol Taiwan 2024; 33(2):88-89. [PMID: 37968091] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 11/17/2023]
Abstract
An 80-year-old woman with a history of rheumatoid arthritis, hypertension, and hyperlipidemia, and no family history of hyperkinesis developed suddenly involuntary movement and visited our hospital two-day after onset. Neuro-examination revealed hemichorea-hemiballismus in the right side of the body, including the face (Suppl. video). Blood tests revealed neither hyperglycemia nor acanthocyte. Brain MRI showed acute microbleeding in the left subthalamic nucleus (Figure 1A-C). Although she was treated with haloperidol (max. 4.5 mg/day), hemichorea-hemiballismus did not subside. Repetitive transcranial magnetic stimulation (rTMS) with a low-frequency protocol (LFP) (1 Hz, 1200 pulses, with a stimulus intensity of 90% of the resting motor threshold, 3 days/week for 2-week) was applied to the left precentral knob (Figure 1D). Its effect was drastic, as the symptoms disappeared for half-hour after rTMS. Hemichorea-hemiballism then reappeared but was attenuated by repeated rTMS. The symptoms disappeared after one-month. Subthalamic nucleus lesions can develop hemichorea-hemiballism (1). According to a study on Huntington's disease and diabetic hemichorea-hemiballism, increased thalamocortical drive may increase the excitability of excitatory and inhibitory circuits of the frontal cortex as the etiologies of hyperkinesia (2-3). However, the target points of rTMS in treating hemichorea-hemiballism have not been consistent in literature. Moreover, rTMS with a LFP on the bilateral supplementary motor areas is effective in treating chorea in Huntington's disease (2). Additionally, rTMS on the ipsilateral precentral knob (primary motor cortex) with continuous θ burst stimulation (cTBS), which decreases the excitability and inhibitory cortical circuits, was effective in treating contralateral hemichorea caused by midbrain hemorrhage (3). Similar to cTBS, LFP can suppress cortical excitation (4); therefore, we applied rTMS with LFP on the primary motor cortex to treat hemichorea-hemiballism. Our results were drastic for both short- and long-term efficiency. This is the first report of the efficacy of rTMS with LFP in treating hemichorea-hemiballism caused by encephalorrhagia.
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Affiliation(s)
- Yuka Nakaya
- Department of Rehabilitation Medicine, Fukui General Hospital, 55-16-1 Egami, Fukui-City, Fukui 910- 8561, Japan
| | - Koji Hayashi
- Department of Rehabilitation Medicine, Fukui General Hospital, 55-16-1 Egami, Fukui-City, Fukui 910- 8561, Japan
| | - Asuka Suzuki
- Department of Rehabilitation Medicine, Fukui General Hospital, 55-16-1 Egami, Fukui-City, Fukui 910- 8561, Japan
| | - Rei Asano
- Department of Rehabilitation Medicine, Fukui General Hospital, 55-16-1 Egami, Fukui-City, Fukui 910- 8561, Japan
| | - Kouji Hayashi
- Graduate School of Health Science, Fukui Health Science University, 55-13-1 Egami, Fukui-City, Fukui 910-3190, Japan
| | - Kazuki Fujita
- Graduate School of Health Science, Fukui Health Science University, 55-13-1 Egami, Fukui-City, Fukui 910-3190, Japan
| | - Kaori Kawabata
- Graduate School of Health Science, Fukui Health Science University, 55-13-1 Egami, Fukui-City, Fukui 910-3190, Japan
| | - Yasutaka Kobayashi
- Graduate School of Health Science, Fukui Health Science University, 55-13-1 Egami, Fukui-City, Fukui 910-3190, Japan
| | - Mamiko Sato
- Department of Rehabilitation Medicine, Fukui General Hospital, 55-16-1 Egami, Fukui-City, Fukui 910- 8561, Japan
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Nakaya Y, Hayashi K, Suzuki A, Asano R, Hayashi K, Fujita K, Kawabata K, Kobayashi Y, Sato M. Treatment of Intracranial Hemorrhage Induced Hemichorea- Hemiballism by Low-Frequency Repetitive Transcranial Magnetic Stimulation. Acta Neurol Taiwan 2024; 33(2):93-94. [PMID: 38030220] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/01/2023]
Abstract
An 80-year-old woman with a history of rheumatoid arthritis, hypertension, and hyperlipidemia, and no family history of hyperkinesis developed suddenly involuntary movement and visited our hospital two-day after onset. Neuro-examination revealed hemichorea-hemiballismus in the right side of the body, including the face (Suppl. video). Blood tests revealed neither hyperglycemia nor acanthocyte. Brain MRI showed acute microbleeding in the left subthalamic nucleus (Figure 1A-C). Although she was treated with haloperidol (max. 4.5 mg/day), hemichorea-hemiballismus did not subside. Repetitive transcranial magnetic stimulation (rTMS) with a low-frequency protocol (LFP) (1 Hz, 1200 pulses, with a stimulus intensity of 90% of the resting motor threshold, 3 days/week for 2-week) was applied to the left precentral knob (Figure 1D). Its effect was drastic, as the symptoms disappeared for half-hour after rTMS. Hemichorea-hemiballism then reappeared but was attenuated by repeated rTMS. The symptoms disappeared after one-month. Subthalamic nucleus lesions can develop hemichorea-hemiballism (1). According to a study on Huntington's disease and diabetic hemichorea-hemiballism, increased thalamocortical drive may increase the excitability of excitatory and inhibitory circuits of the frontal cortex as the etiologies of hyperkinesia (2-3). However, the target points of rTMS in treating hemichorea-hemiballism have not been consistent in literature. Moreover, rTMS with a LFP on the bilateral supplementary motor areas is effective in treating chorea in Huntington's disease (2). Additionally, rTMS on the ipsilateral precentral knob (primary motor cortex) with continuous θ burst stimulation (cTBS), which decreases the excitability and inhibitory cortical circuits, was effective in treating contralateral hemichorea caused by midbrain hemorrhage (3). Similar to cTBS, LFP can suppress cortical excitation (4); therefore, we applied rTMS with LFP on the primary motor cortex to treat hemichorea-hemiballism. Our results were drastic for both short- and long-term efficiency. This is the first report of the efficacy of rTMS with LFP in treating hemichorea-hemiballism caused by encephalorrhagia.
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Affiliation(s)
- Yuka Nakaya
- Department of Rehabilitation Medicine, Fukui General Hospital, 55-16-1 Egami, Fukui-City, Fukui 910- 8561, Japan
| | - Koji Hayashi
- Department of Rehabilitation Medicine, Fukui General Hospital, 55-16-1 Egami, Fukui-City, Fukui 910- 8561, Japan
| | - Asuka Suzuki
- Department of Rehabilitation Medicine, Fukui General Hospital, 55-16-1 Egami, Fukui-City, Fukui 910- 8561, Japan
| | - Rei Asano
- Department of Rehabilitation Medicine, Fukui General Hospital, 55-16-1 Egami, Fukui-City, Fukui 910- 8561, Japan
| | - Kouji Hayashi
- Graduate School of Health Science, Fukui Health Science University, 55-13-1 Egami, Fukui-City, Fukui 910-3190, Japan
| | - Kazuki Fujita
- Graduate School of Health Science, Fukui Health Science University, 55-13-1 Egami, Fukui-City, Fukui 910-3190, Japan
| | - Kaori Kawabata
- Graduate School of Health Science, Fukui Health Science University, 55-13-1 Egami, Fukui-City, Fukui 910-3190, Japan
| | - Yasutaka Kobayashi
- Graduate School of Health Science, Fukui Health Science University, 55-13-1 Egami, Fukui-City, Fukui 910-3190, Japan
| | - Mamiko Sato
- Department of Rehabilitation Medicine, Fukui General Hospital, 55-16-1 Egami, Fukui-City, Fukui 910- 8561, Japan
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Ueda M, Hayashi K, Suzuki A, Nakaya Y, Takaku N, Miura T, Sato M, Hayashi K, Kobayashi Y. Treatment of Subcortical Aphasia Due to Putaminal Hemorrhage With the Japanese Version of Melodic Intonation Therapy (MIT-J). Cureus 2024; 16:e55590. [PMID: 38576684 PMCID: PMC10994653 DOI: 10.7759/cureus.55590] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/05/2024] [Indexed: 04/06/2024] Open
Abstract
Melodic intonation therapy (MIT) is one of the rehabilitation methods for patients with non-fluent or dysfluent aphasia, mainly caused by stroke or brain injury. Although MIT is conducted in various languages, reports on the Japanese version of MIT (MIT-J) are limited. In this report, we describe a case about the efficacy of MIT-J in the subacute phase after stroke on subcortical aphasia. Our case was a 60-year-old right-handed woman who suffered from left putaminal hemorrhage. She was treated with acute therapy, including medications and rehabilitation, but non-fluent aphasia was preserved. Regardless of general speech therapies, her aphasia was not improved. In the subacute phase, we started MIT-J (protocol: 20 minutes per day, five days per week for two weeks). The effect of MIT-J was remarkable and in particular, speech intelligibility was improved. It is required to accumulate more cases to reveal the effect of MIT-J.
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Affiliation(s)
- Midori Ueda
- Department of Rehabilitation Medicine, Fukui General Hospital, Fukui, JPN
| | - Koji Hayashi
- Department of Rehabilitation Medicine, Fukui General Hospital, Fukui, JPN
| | - Asuka Suzuki
- Department of Rehabilitation Medicine, Fukui General Hospital, Fukui, JPN
| | - Yuka Nakaya
- Department of Rehabilitation Medicine, Fukui General Hospital, Fukui, JPN
| | - Naoko Takaku
- Department of Rehabilitation Medicine, Fukui General Hospital, Fukui, JPN
| | - Toyoaki Miura
- Department of Rehabilitation Medicine, Fukui General Hospital, Fukui, JPN
| | - Mamiko Sato
- Department of Rehabilitation Medicine, Fukui General Hospital, Fukui, JPN
| | - Kouji Hayashi
- Graduate School of Health Science, Fukui Health Science University, Fukui, JPN
| | - Yasutaka Kobayashi
- Graduate School of Health Science, Fukui Health Science University, Fukui, JPN
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Mitsuhashi S, Suzuki A, Hayashi K, Sato M, Nakaya Y, Takaku N, Kobayashi Y. Miller-Fisher Syndrome Following Influenza A Infection. Cureus 2024; 16:e56064. [PMID: 38618457 PMCID: PMC11009552 DOI: 10.7759/cureus.56064] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/12/2024] [Indexed: 04/16/2024] Open
Abstract
Miller-Fisher syndrome (MFS), characterized by ophthalmoplegia, ataxia, and areflexia, is a Guillain-Barré syndrome (GBS) variant. It is well-known that the causative antibody for MFS is anti-GQ1b antibody. This report describes a rare case of MFS with not only anti-GQ1b antibodies but also anti-GT1a antibodies following Influenza A infection. The patient, a 47-year-old woman, contracted Influenza A three weeks before admission. She complained of double vision followed by areflexia, ataxia in the four extremities, and complete gaze palsy. She was treated with intravenous methylprednisolone pulse and intravenous immunoglobulin therapies. Her neurological symptoms were recovered after these immunotherapies.
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Affiliation(s)
- Shiho Mitsuhashi
- Department of Rehabilitation Medicine, Fukui General Hospital, Fukui, JPN
| | - Asuka Suzuki
- Department of Rehabilitation Medicine, Fukui General Hospital, Fukui, JPN
| | - Koji Hayashi
- Department of Rehabilitation Medicine, Fukui General Hospital, Fukui, JPN
| | - Mamiko Sato
- Department of Rehabilitation Medicine, Fukui General Hospital, Fukui, JPN
| | - Yuka Nakaya
- Department of Rehabilitation Medicine, Fukui General Hospital, Fukui, JPN
| | - Naoko Takaku
- Department of Rehabilitation Medicine, Fukui General Hospital, Fukui, JPN
| | - Yasutaka Kobayashi
- Graduate School of Health Science, Fukui Health Science University, Fukui, JPN
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Hayashi K, Asano R, Sato M, Nakaya Y, Suzuki A, Takaku N, Hayashi K, Kobayashi Y. Efficacy of Trihexyphenidyl on Apraxia of Eyelid Opening in Parkinsonism: A Case Report. Cureus 2024; 16:e56232. [PMID: 38618350 PMCID: PMC11016287 DOI: 10.7759/cureus.56232] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/15/2024] [Indexed: 04/16/2024] Open
Abstract
Apraxia of eyelid opening (AEO) is occasionally seen in Parkinson's disease (PD) or related diseases. However, many clinicians have trouble with the management of AEO by Parkinsonism. In this report, we describe a case of AEO in Parkinsonism improved by trihexyphenidyl (THP). The patient was a 64-year-old woman, who was previously healthy but developed bradykinesia. She was clinically diagnosed as PD due to an L-dopa challenge test, but no other detailed tests were performed. She started antiparkinsonian medications and her symptoms were improved at an early phase. However, her motor symptoms were gradually exacerbated over time, and antiparkinsonian medications were dosed up. At 69 years old, blepharospasm and AEO developed. Although other antiparkinsonian medications did not improve her AEO, THP cured AEO dramatically at 73 years old. In this report, we discuss a mechanism of AEO by Parkinsonism and the pathway of THP for the improvement of AEO.
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Affiliation(s)
- Koji Hayashi
- Department of Rehabilitation Medicine, Fukui General Hospital, Fukui, JPN
| | - Rei Asano
- Department of Rehabilitation Medicine, Fukui General Hospital, Fukui, JPN
| | - Mamiko Sato
- Department of Rehabilitation Medicine, Fukui General Hospital, Fukui, JPN
| | - Yuka Nakaya
- Department of Rehabilitation Medicine, Fukui General Hospital, Fukui, JPN
| | - Asuka Suzuki
- Department of Rehabilitation Medicine, Fukui General Hospital, Fukui, JPN
| | - Naoko Takaku
- Department of Rehabilitation Medicine, Fukui General Hospital, Fukui, JPN
| | - Kouji Hayashi
- Graduate School of Health Science, Fukui Health Science University, Fukui, JPN
| | - Yasutaka Kobayashi
- Graduate School of Health Science, Fukui Health Science University, Fukui, JPN
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Nakaya Y, Hayashi K, Suzuki A, Matsuyama T, Sato M, Kobayashi Y. Pure Motor Isolated Finger Palsy by Cerebral Infarction: Tips for Diagnosis by Neurological Examination. Cureus 2024; 16:e54390. [PMID: 38505443 PMCID: PMC10949345 DOI: 10.7759/cureus.54390] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/18/2024] [Indexed: 03/21/2024] Open
Abstract
There are various causes of unilateral finger palsy. Its potential etiologies include peripheral neuropathy, carpal tunnel syndrome, and nerve root disorder due to myelopathy. In addition to them, similar paralysis has been reported in localized lesions of the cerebrum, classically referred to as pseudoperipheral palsy. In this report, we describe a case of an 80-year-old man who developed sudden clumsiness of the right fingers. Neurological examination showed muscle weakness mainly in the 1st and 2nd fingers (Medical Research Council grade 1-4) and normal reflexes in the extremities. The affected muscles were innervated by the median nerve, ulnar nerve, and radial nerve, and their nerve root levels ranged from C6 to T1. All the Phalen's, Tinel's, and flick signs were negative. Diffusion-weighted brain magnetic resonance imaging showed hyperintensity limited in the precentral knob on the left precentral gyrus. The etiology was diagnosed as cardiogenic embolism due to atrial fibrillation. In this report, we provide key findings for diagnosing pure motor isolated finger palsy by cerebral infarction through neurological examination.
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Affiliation(s)
- Yuka Nakaya
- Department of Rehabilitation Medicine, Fukui General Hospital, Fukui, JPN
| | - Koji Hayashi
- Department of Rehabilitation Medicine, Fukui General Hospital, Fukui, JPN
| | - Asuka Suzuki
- Department of Rehabilitation Medicine, Fukui General Hospital, Fukui, JPN
| | - Takumi Matsuyama
- Department of Rehabilitation Medicine, Fukui General Hospital, Fukui, JPN
| | - Mamiko Sato
- Department of Rehabilitation Medicine, Fukui General Hospital, Fukui, JPN
| | - Yasutaka Kobayashi
- Graduate School of Health Science, Fukui Health Science University, Fukui, JPN
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Hayashi K, Ueda M, Suzuki A, Nakaya Y, Hamada H, Sato M, Hayashi K, Kobayashi Y. Lateral Medullary Infarction With Atonic Bladder and Lateropulsion. Cureus 2024; 16:e54492. [PMID: 38516483 PMCID: PMC10955107 DOI: 10.7759/cureus.54492] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/19/2024] [Indexed: 03/23/2024] Open
Abstract
Lateral medullary infarction (LMI), or Wallenberg syndrome, can develop various symptoms, but it is rare that ipsilateral axial lateropulsion (or body lateropulsion, BL) or atonic bladder (AB) are caused by LMI. This report describes a case of LMI with both BL and AB. A 77-year-old man, with a history of hypertension and diabetes, developed acute left BL and anuresis. A neurological exam showed right gaze nystagmus, slight dysarthria and dysphagia, right dysesthesia in the trunk, and ataxia in the left limbs and trunk. Horner's syndrome and paralysis were unremarkable. Brain magnetic resonance imaging revealed hyperintensity in the lateral medulla oblongata. Cystometry revealed AB, although the patient had the urge to urinate. Owing to acute therapy, although trunk ataxia was presented for several months, BL and anuresis were recovered on day 15 and day 35, respectively. Here, we describe the potential mechanisms of BL and AB caused by LMI.
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Affiliation(s)
- Koji Hayashi
- Department of Rehabilitation Medicine, Fukui General Hospital, Fukui, JPN
| | - Midori Ueda
- Department of Rehabilitation Medicine, Fukui General Hospital, Fukui, JPN
| | - Asuka Suzuki
- Department of Rehabilitation Medicine, Fukui General Hospital, Fukui, JPN
| | - Yuka Nakaya
- Department of Rehabilitation Medicine, Fukui General Hospital, Fukui, JPN
| | - Hina Hamada
- Department of Rehabilitation Medicine, Fukui General Hospital, Fukui, JPN
| | - Mamiko Sato
- Department of Rehabilitation Medicine, Fukui General Hospital, Fukui, JPN
| | - Kouji Hayashi
- Graduate School of Health Science, Fukui Health Science University, Fukui, JPN
| | - Yasutaka Kobayashi
- Graduate School of Health Science, Fukui Health Science University, Fukui, JPN
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Hayashi M, Ueda M, Hayashi K, Kawahara E, Azuma SI, Suzuki A, Nakaya Y, Asano R, Sato M, Miura T, Hayashi H, Hayashi K, Kobayashi Y. Case report: Clinically mild encephalitis/encephalopathy with a reversible splenial lesion: an autopsy case. Front Neurol 2024; 14:1322302. [PMID: 38239318 PMCID: PMC10794512 DOI: 10.3389/fneur.2023.1322302] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2023] [Accepted: 11/28/2023] [Indexed: 01/22/2024] Open
Abstract
Clinically mild encephalitis/encephalopathy with a reversible splenial lesion is a clinicoradiological syndrome characterized by transient neuropsychiatric symptoms and hyperintensity of the splenium of the corpus callosum on diffusion-weighted MRI. Although intramyelinic edema and inflammatory cell infiltration can be predicted by MRI, the pathology of the splenium of the corpus callosum remains unknown. We encountered a case of clinically mild encephalitis/encephalopathy with a reversible splenial lesion and hypoglycemia in a patient who died of sepsis, and an autopsy was performed. The postmortem pathological findings included intramyelinic edema, myelin pallor, loss of fibrous astrocytes, microglial reactions, and minimal lymphocytic infiltration in the parenchyma. Based on these findings, transient demyelination following cytotoxic edema in the splenium of corpus callosum was strongly considered a pathogenesis of "clinically mild encephalitis/encephalopathy with a reversible splenial lesion" associated with hypoglycemia, and it could be generalized for the disease associated with the other causes. As cytotoxic edema could be the central pathology of the disease, the recently proposed term cytotoxic lesions of the corpus callosum may be applicable to this syndrome.
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Affiliation(s)
- Maho Hayashi
- Department of Diabetes and Endocrinology, Fukui General Hospital, Egami-cho, Fukui, Japan
| | - Midori Ueda
- Department of Rehabilitation Medicine, Fukui General Hospital, Egami-cho, Fukui, Japan
| | - Koji Hayashi
- Department of Rehabilitation Medicine, Fukui General Hospital, Egami-cho, Fukui, Japan
| | - Ei Kawahara
- Department of Pathology, Fukui General Hospital, Egami-cho, Fukui, Japan
| | - Shin-ichiro Azuma
- Department of Diabetes and Endocrinology, Fukui General Hospital, Egami-cho, Fukui, Japan
| | - Asuka Suzuki
- Department of Rehabilitation Medicine, Fukui General Hospital, Egami-cho, Fukui, Japan
| | - Yuka Nakaya
- Department of Rehabilitation Medicine, Fukui General Hospital, Egami-cho, Fukui, Japan
| | - Rei Asano
- Department of Rehabilitation Medicine, Fukui General Hospital, Egami-cho, Fukui, Japan
| | - Mamiko Sato
- Department of Rehabilitation Medicine, Fukui General Hospital, Egami-cho, Fukui, Japan
| | - Toyoaki Miura
- Department of Rehabilitation Medicine, Fukui General Hospital, Egami-cho, Fukui, Japan
| | - Hiromi Hayashi
- Department of Rehabilitation Medicine, Fukui General Hospital, Egami-cho, Fukui, Japan
| | - Kouji Hayashi
- Department of Rehabilitation, Faculty of Health Science, Fukui Health Science University, Egami-cho, Fukui, Japan
| | - Yasutaka Kobayashi
- Department of Rehabilitation, Faculty of Health Science, Fukui Health Science University, Egami-cho, Fukui, Japan
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Suzuki A, Hayashi K, Nakaya Y, Hayashi M, Hayashi K, Kobayashi Y, Sato M. Normal-Pressure Hydrocephalus-Like Appearance in Myotonic Dystrophy Type 1. Cureus 2024; 16:e53130. [PMID: 38420055 PMCID: PMC10899733 DOI: 10.7759/cureus.53130] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/28/2024] [Indexed: 03/02/2024] Open
Abstract
Myotonic dystrophy type 1 (DM1) is one of the monogenic neurological diseases that neurologists most often experience. DM1 can develop several symptoms, including muscle weakness, gait disturbance, urinary incontinence, and cognitive decline. Other hand, normal pressure hydrocephalus (NPH) is more frequent in the elderly population and is characterized by a triad of symptoms, gait disturbance, urinary urge incontinence, and cognitive decline. Therefore, some symptoms overlap between DM1 and NPH. In this report, we described a case of DM1 that presented with a triad of NPH, and NPH-like changes in brain images. A 54-year-old man with DM1 visited our hospital for rehabilitation. He had a history of dyslipidemia, diabetes, and cataracts. He developed muscle weakness, blepharoptosis, and dysarthria at 43 years. Neuro-exam revealed percussion and grip myotonia, distal muscle weakness and atrophy, broad-based gait, and urinary incontinence. The mini-mental state examination score was 18. Brain magnetic resonance imaging revealed enlarged lateral and third ventricles and Evans index was 0.38 (NPH criterion; >0.3), which was mimicking for NPH. Tap test (TT) was evaluated twice. First TT improved clinical symptoms slightly, but second was unremarkable. Based on the second TT result, we could not diagnose with NPH and could prevent unnecessary surgical shunting. Brain imaging of DM1 can show an NPH-like appearance in patients older than 50. Although TT is the gold standard for diagnosing NPH, its sensitivity and specificity vary among reports. TT results should be interpreted with caution before performing a surgical shunt. If necessary, multiple TTs should be considered in DM1 patients.
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Affiliation(s)
- Asuka Suzuki
- Department of Rehabilitation Medicine, Fukui General Hospital, Fukui, JPN
| | - Koji Hayashi
- Department of Rehabilitation Medicine, Fukui General Hospital, Fukui, JPN
| | - Yuka Nakaya
- Department of Rehabilitation Medicine, Fukui General Hospital, Fukui, JPN
| | - Maho Hayashi
- Department of Internal Medicine, Fukui General Hospital, Fukui, JPN
| | - Kouji Hayashi
- Graduate School of Health Science, Fukui Health Science University, Fukui, JPN
| | - Yasutaka Kobayashi
- Graduate School of Health Science, Fukui Health Science University, Fukui, JPN
| | - Mamiko Sato
- Department of Rehabilitation Medicine, Fukui General Hospital, Fukui, JPN
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Ogawa T, Fujita K, Kawabata K, Hori H, Hayashi K, Suzuki A, Nakaya Y, Kobayashi Y. Is it safe to control the car pedal with the lower limb of the unaffected side in patients with stroke? Traffic Inj Prev 2023; 25:27-35. [PMID: 37773056 DOI: 10.1080/15389588.2023.2260914] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/12/2023] [Accepted: 09/15/2023] [Indexed: 09/30/2023]
Abstract
OBJECTIVES Few studies have examined motor function in determining the suitability of patients with stroke to resume driving a car. Patients with hemiplegia usually control car pedals with the unaffected lower limb. However, motor control on the unaffected side is also impaired in patients with stroke. This study aimed to clarify the neurophysiological characteristics of pedal switching control during emergency braking in patients with hemiplegia. METHODS The study participants consisted of 10 drivers with left hemiplegia and 10 age-matched healthy drivers. An experimental pedal was used to measure muscle activity and kinematic data during braking, triggered by the light from a light-emitting diode placed in front of the drivers. RESULTS The patient group took the same reaction time as the healthy group. However, from the visual stimulus to the release of the accelerator pedal, the patient group had higher muscle activity in the tibialis anterior and rectus femoris and had faster angular velocities of hip and knee flexion than the healthy group. In addition, the patient group had higher co-contraction activities between flexors and extensors. From the accelerator pedal release to brake contact, the patient group had slower angular velocities of hip adduction, internal rotation, ankle dorsiflexion, internal return, and internal rotation than the healthy group. CONCLUSIONS Patients with hemiplegia exhibited poor control of pedal switching using their unaffected side throughout the pedal-switching task. These results indicate that the safety related to car-pedal control should be carefully evaluated while deciding whether a patient can resume driving a car after a stroke.
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Affiliation(s)
- Tomoki Ogawa
- Department of Health Science, Graduate School of Health Science, Fukui Health Science University, Fukui, Japan
- Department of Physical Therapy Rehabilitation, Fukui General Hospital, Fukui, Japan
| | - Kazuki Fujita
- Graduate School of Health Science, Fukui Health Science University, Fukui, Japan
| | - Kaori Kawabata
- Graduate School of Health Science, Fukui Health Science University, Fukui, Japan
| | - Hideaki Hori
- Graduate School of Health Science, Fukui Health Science University, Fukui, Japan
| | - Koji Hayashi
- Department of Rehabilitation Medicine, Fukui General Hospital, Fukui, Japan
| | - Asuka Suzuki
- Department of Rehabilitation Medicine, Fukui General Hospital, Fukui, Japan
| | - Yuka Nakaya
- Department of Rehabilitation Medicine, Fukui General Hospital, Fukui, Japan
| | - Yasutaka Kobayashi
- Graduate School of Health Science, Fukui Health Science University, Fukui, Japan
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11
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Nakaya Y, Hayashi K, Suzuki A, Sato M. Hepatic Cyst and Thrombus in the Inferior Vena Cava. Intern Med 2023; 62:3257. [PMID: 36858517 PMCID: PMC10686724 DOI: 10.2169/internalmedicine.1588-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/10/2023] [Accepted: 01/20/2023] [Indexed: 03/03/2023] Open
Affiliation(s)
- Yuka Nakaya
- Department of Rehabilitation Medicine, Fukui General Hospital, Japan
| | - Koji Hayashi
- Department of Rehabilitation Medicine, Fukui General Hospital, Japan
| | - Asuka Suzuki
- Department of Rehabilitation Medicine, Fukui General Hospital, Japan
| | - Mamiko Sato
- Department of Rehabilitation Medicine, Fukui General Hospital, Japan
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12
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Nakaya Y, Kosukegawa S, Kobayashi S, Hirose K, Kitano K, Mayahara K, Takei H, Motoyoshi M, Kobayashi M. Insulin potentiates inhibitory synaptic currents between fast-spiking and pyramidal neurons in the rat insular cortex. Neuropharmacology 2023:109649. [PMID: 37393988 DOI: 10.1016/j.neuropharm.2023.109649] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2023] [Revised: 06/27/2023] [Accepted: 06/30/2023] [Indexed: 07/04/2023]
Abstract
Insulin plays roles in brain functions such as neural development and plasticity and is reported to be involved in dementia and depression. However, little information is available on the insulin-mediated modulation of electrophysiological activities, especially in the cerebral cortex. This study examined how insulin modulates the neural activities of inhibitory neurons and inhibitory postsynaptic currents (IPSCs) in rat insular cortex (IC; either sex) by multiple whole-cell patch-clamp recordings. We demonstrated that insulin increased the repetitive spike firing rate with a decrease in the threshold potential without changing the resting membrane potentials and input resistance of fast-spiking GABAergic neurons (FSNs). Next, we found a dose-dependent enhancement of unitary IPSCs (uIPSCs) by insulin in the connections from FSNs to pyramidal neurons (PNs). The insulin-induced enhancement of uIPSCs accompanied decreases in the paired-pulse ratio, suggesting that insulin increases GABA release from presynaptic terminals. The finding of miniature IPSC recordings of the increased frequency without changing the amplitude supports this hypothesis. Insulin had little effect on uIPSCs under the coapplication of S961, an insulin receptor antagonist, or lavendustin A, an inhibitor of tyrosine kinase. The PI3-K inhibitor wortmannin or the PKB/Akt inhibitors, deguelin and Akt inhibitor VIII, blocked the insulin-induced enhancement of uIPSCs. Intracellular application of Akt inhibitor VIII to presynaptic FSNs also blocked insulin-induced enhancement of uIPSCs. In contrast, uIPSCs were enhanced by insulin in combination with the MAPK inhibitor PD98059. These results suggest that insulin facilitates the inhibition of PNs by increases in FSN firing frequency and IPSCs from FSNs to PNs. (250 words).
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Affiliation(s)
- Yuka Nakaya
- Department of Pharmacology, Nihon University School of Dentistry, 1-8-13 Kanda-Surugadai, Chiyoda-ku, Tokyo, 101-8310, Japan; Division of Oral and Craniomaxillofacial Research, Dental Research Center, Nihon University School of Dentistry, 1-8-13 Kanda-Surugadai, Chiyoda-ku, Tokyo, 101-8310, Japan
| | - Satoshi Kosukegawa
- Department of Pharmacology, Nihon University School of Dentistry, 1-8-13 Kanda-Surugadai, Chiyoda-ku, Tokyo, 101-8310, Japan; Department of Orthodontics, Nihon University School of Dentistry, 1-8-13 Kanda-Surugadai, Chiyoda-ku, Tokyo, 101-8310, Japan
| | - Satomi Kobayashi
- Department of Pharmacology, Nihon University School of Dentistry, 1-8-13 Kanda-Surugadai, Chiyoda-ku, Tokyo, 101-8310, Japan; Division of Oral and Craniomaxillofacial Research, Dental Research Center, Nihon University School of Dentistry, 1-8-13 Kanda-Surugadai, Chiyoda-ku, Tokyo, 101-8310, Japan; Department of Biology, Nihon University School of Dentistry, 1-8-13 Kanda-Surugadai, Chiyoda-ku, Tokyo, 101-8310, Japan
| | - Kensuke Hirose
- Department of Pharmacology, Nihon University School of Dentistry, 1-8-13 Kanda-Surugadai, Chiyoda-ku, Tokyo, 101-8310, Japan; Department of Pedodontics, Nihon University School of Dentistry, 1-8-13 Kanda-Surugadai, Chiyoda-ku, Tokyo, 101-8310, Japan
| | - Kouhei Kitano
- Department of Pharmacology, Nihon University School of Dentistry, 1-8-13 Kanda-Surugadai, Chiyoda-ku, Tokyo, 101-8310, Japan
| | - Kotoe Mayahara
- Division of Oral and Craniomaxillofacial Research, Dental Research Center, Nihon University School of Dentistry, 1-8-13 Kanda-Surugadai, Chiyoda-ku, Tokyo, 101-8310, Japan; Department of Orthodontics, Nihon University School of Dentistry, 1-8-13 Kanda-Surugadai, Chiyoda-ku, Tokyo, 101-8310, Japan
| | - Hiroki Takei
- Department of Dentistry, Saitama Prefectural Children's Medical Center, 1-2, Shintoshin, Chuo-ku, Saitama-shi, 3330-8777, Japan
| | - Mitsuru Motoyoshi
- Division of Oral and Craniomaxillofacial Research, Dental Research Center, Nihon University School of Dentistry, 1-8-13 Kanda-Surugadai, Chiyoda-ku, Tokyo, 101-8310, Japan; Department of Orthodontics, Nihon University School of Dentistry, 1-8-13 Kanda-Surugadai, Chiyoda-ku, Tokyo, 101-8310, Japan
| | - Masayuki Kobayashi
- Department of Pharmacology, Nihon University School of Dentistry, 1-8-13 Kanda-Surugadai, Chiyoda-ku, Tokyo, 101-8310, Japan; Division of Oral and Craniomaxillofacial Research, Dental Research Center, Nihon University School of Dentistry, 1-8-13 Kanda-Surugadai, Chiyoda-ku, Tokyo, 101-8310, Japan.
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13
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Nakaya Y, Iwata K, Kobayashi M. Insular cortical descending projections facilitate neuronal responses to noxious but not innoxious stimulation in rat trigeminal spinal subnucleus caudalis. Brain Res 2023; 1804:148248. [PMID: 36681372 DOI: 10.1016/j.brainres.2023.148248] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2022] [Revised: 01/07/2023] [Accepted: 01/16/2023] [Indexed: 01/19/2023]
Abstract
The insular cortex (IC) receives orofacial nociceptive information. Pyramidal neurons in IC layer V send their axons to various brain regions, such as the trigeminal spinal subnucleus caudalis (Sp5C), parabrachial nucleus, and periaqueductal gray. However, little information has been available about the functions of these descending projections from the IC. This study aimed to elucidate the effect of IC → Sp5C on neuronal spike firings responding to noxious and innoxious stimuli to the face of the rat receiving an injection of adeno-associated virus encoding modified channelrhodopsin-2 (ChR2) fused to mCherry under the control of the human synapsin promotor. We classified Sp5C neurons responding to mechanical stimuli into three groups: low-threshold (LT), nociceptive specific (NS), and wide dynamic range (WDR) neurons, which respond to innoxious stimuli (brushing) only, noxious mechanical stimuli (pinching) only, and both noxious and innoxious stimuli, respectively. Neuronal activities of IC neurons were activated by photostimulation (repetitive pulses at 20 Hz for 5 Hz) to the IC that consistently induced action potentials in IC layer V pyramidal neurons. LT neurons showed comparable spike firing rates to brushing the facial skin before and during ChR2 activation induced by photostimulation. In contrast, NS neurons showed an increase in their firing frequency to pinching during ChR2 activation. On the other hand, WDR neurons increased their Sp5C neuronal firing to pinching during ChR2 activation without changing their firing rates to innoxious mechanical stimuli. These results suggest that the IC descending projections facilitate nociception by increasing Sp5C neuronal activities responding to noxious mechanical stimuli.
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Affiliation(s)
- Yuka Nakaya
- Department of Pharmacology, Nihon University School of Dentistry, 1-8-13, Japan; Division of Oral and Craniomaxillofacial Research, Dental Research Center, Nihon University School of Dentistry, 1-8-13 Kanda-Surugadai, Chiyoda-ku, Tokyo 101-8310, Japan.
| | - Koichi Iwata
- Department of Physiology, Nihon University School of Dentistry, 1-8-13 Kanda-Surugadai, Chiyoda-ku, Tokyo 101-8310, Japan
| | - Masayuki Kobayashi
- Department of Pharmacology, Nihon University School of Dentistry, 1-8-13, Japan; Division of Oral and Craniomaxillofacial Research, Dental Research Center, Nihon University School of Dentistry, 1-8-13 Kanda-Surugadai, Chiyoda-ku, Tokyo 101-8310, Japan.
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14
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Nakaya Y, Yamamoto K, Kobayashi M. Descending projections from the insular cortex to the trigeminal spinal subnucleus caudalis facilitate excitatory outputs to the parabrachial nucleus in rats. Pain 2023; 164:e157-e173. [PMID: 35969237 PMCID: PMC9916064 DOI: 10.1097/j.pain.0000000000002755] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2022] [Revised: 07/09/2022] [Accepted: 07/27/2022] [Indexed: 11/26/2022]
Abstract
ABSTRACT Nociceptive information from the orofacial area projects to the trigeminal spinal subnucleus caudalis (Sp5C) and is then conveyed to several nuclei, including the parabrachial nucleus (PBN). The insular cortex (IC) receives orofacial nociceptive information and sends corticofugal projections to the Sp5C. The Sp5C consists of glutamatergic and GABAergic/glycinergic interneurons that induce excitatory postsynaptic currents and inhibitory postsynaptic currents, respectively, in projection neurons. Therefore, quantification of glutamatergic IC inputs in combination with identifying postsynaptic neuronal subtypes is critical to elucidate IC roles in the regulation of Sp5C activities. We investigated features of synaptic transmission from the IC to glutamatergic and GABAergic/glycinergic Sp5C neurons of laminae I/II using vesicular GABA transporter-Venus transgenic rats that received an injection of adeno-associated virus-channelrhodopsin-2-mCherry into the IC. Selective stimulation of IC axon terminals in Sp5C slice preparations induced monosynaptic excitatory postsynaptic currents in both excitatory glutamatergic and inhibitory GABAergic/glycinergic Sp5C neurons with a comparable amplitude. Paired whole-cell patch-clamp recordings showed that unitary inhibitory postsynaptic currents from inhibitory neurons influencing excitatory neurons, including neurons projecting to the PBN, exhibited a high failure rate and were suppressed by both bicuculline and strychnine, suggesting that excitatory neurons in the Sp5C receive both GABAergic and glycinergic inhibition with low impact. Moreover, selective stimulation of IC axons increased the firing rate at the threshold responses. Finally, we demonstrated that selective stimulation of IC axons in the Sp5C by a chemogenetic approach decreased the thresholds of both mechanical and thermal nociception. Thus, IC projection to the Sp5C is likely to facilitate rather than suppress excitatory outputs from the Sp5C.
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Affiliation(s)
- Yuka Nakaya
- Department of Pharmacology, Nihon University School of Dentistry, Tokyo, Japan
- Division of Oral and Craniomaxillofacial Research, Dental Research Center, Nihon University School of Dentistry, Tokyo, Japan
| | - Kiyofumi Yamamoto
- Department of Pharmacology, Nihon University School of Dentistry, Tokyo, Japan
- Division of Oral and Craniomaxillofacial Research, Dental Research Center, Nihon University School of Dentistry, Tokyo, Japan
| | - Masayuki Kobayashi
- Department of Pharmacology, Nihon University School of Dentistry, Tokyo, Japan
- Division of Oral and Craniomaxillofacial Research, Dental Research Center, Nihon University School of Dentistry, Tokyo, Japan
- Molecular Dynamics Imaging Unit, RIKEN Center for Life Science Technologies, Kobe, Japan
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15
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Kosukegawa S, Nakaya Y, Kobayashi S, Kitano K, Matsumura S, Ogisawa S, Zama M, Motoyoshi M, Kobayashi M. Insulin facilitates synaptic transmission via gap junctions between fast-spiking interneurons in the rat insular cortex. J Oral Sci 2023; 65:77-80. [PMID: 36823134 DOI: 10.2334/josnusd.22-0438] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/24/2023]
Abstract
PURPOSE Inhibitory synaptic currents from fast-spiking neurons (FSNs), a typical gamma-aminobutyric acid (GABA)ergic interneuron in the cerebral cortex, to pyramidal neurons are facilitated by insulin. FSNs frequently show electrical synapses to FSNs, however, the effect of insulin on these electrical synapses is unknown. The aim of this study was to evaluate effects of insulin on electrical synaptic potentials between FSNs. METHODS Electrical synaptic potentials via gap junctions between FSNs were recorded to examine how insulin modulates these potentials in the rat insular cortex (IC). RESULTS Bath application of insulin (10 nM), which increases the spike firing rate of pyramidal neurons and unitary inhibitory postsynaptic currents recorded from FSN to pyramidal neuron connections, slightly but significantly increased electrical synaptic currents. The mean ratio of electrical synapses, the coupling coefficient that is obtained by postsynaptic voltage responses divided by presynaptic voltage amplitude, was 8.3 ± 1.1% in control and 9.2 ± 1.1% (n = 14) during 10 nM insulin application. Input resistance and voltage responses to large hyperpolarizing currents (-140 pA) were not changed by insulin. CONCLUSION These results suggest that insulin facilitates spike synchronization by increasing electrical synaptic currents via gap junctions of GABAergic FSNs in the IC.
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Affiliation(s)
- Satoshi Kosukegawa
- Department of Pharmacology, Nihon University School of Dentistry.,Department of Orthodontics, Nihon University School of Dentistry
| | - Yuka Nakaya
- Department of Pharmacology, Nihon University School of Dentistry.,Division of Oral and Craniomaxillofacial Research, Dental Research Center, Nihon University School of Dentistry
| | - Satomi Kobayashi
- Department of Pharmacology, Nihon University School of Dentistry.,Department of Biology, Nihon University School of Dentistry
| | - Kohei Kitano
- Department of Pharmacology, Nihon University School of Dentistry
| | - Sachie Matsumura
- Department of Pediatric Dentistry, Nihon University School of Dentistry
| | - Shohei Ogisawa
- Department of Maxillofacial Surgery, Nihon University School of Dentistry
| | - Manabu Zama
- Department of Maxillofacial Surgery, Nihon University School of Dentistry
| | - Mitsuru Motoyoshi
- Department of Orthodontics, Nihon University School of Dentistry.,Division of Oral and Craniomaxillofacial Research, Dental Research Center, Nihon University School of Dentistry
| | - Masayuki Kobayashi
- Department of Pharmacology, Nihon University School of Dentistry.,Division of Oral and Craniomaxillofacial Research, Dental Research Center, Nihon University School of Dentistry.,Molecular Dynamics Imaging Unit, Riken Centre for Life Science Technologies
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16
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Yamamoto K, Nakaya Y, Sugawara S, Kobayashi M. Synchronous inhibitory synaptic inputs to layer II/III pyramidal neurons in the murine barrel cortex. Brain Res 2021; 1773:147686. [PMID: 34637762 DOI: 10.1016/j.brainres.2021.147686] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2021] [Revised: 09/15/2021] [Accepted: 10/05/2021] [Indexed: 11/24/2022]
Abstract
The barrel cortex exhibits obvious columnar organization. Although GABAergic inhibition plays a critical role in regulating neural excitation in response to mechanical stimuli applied to whiskers, the profiles of synchronous events for inhibitory synaptic transmission in intracolumnar and transcolumnar pyramidal neurons remain unknown. To explore a functional mechanism of synchronous inhibition of pyramidal neurons, we performed paired whole-cell patch-clamp recordings and recorded spontaneous inhibitory postsynaptic currents (sIPSCs) from layer II/III pyramidal neurons. A cross-correlogram of sIPSCs (1 ms bin) was used to detect synchronous sIPSCs. Synchronous neuron pairs were defined as those whose peak number of sIPSCs between -3 and 3 ms exceeded the mean + 2 SD of the number of sIPSCs in the period of -50 to 50 ms minus the number in that of -3 to 3 ms period. In the recording of pyramidal neurons located in the same column (intracolumn), 61.5% of neuron pairs were classified as synchronous neuron pairs, while 52.6% of pyramidal neuron pairs in adjacent columns (transcolumn) were defined as synchronous neuron pairs. The amplitude of synchronous sIPSCs was comparable to that of asynchronous sIPSCs in asynchronous neuron pairs, whereas that of synchronous sIPSCs was larger than that of asynchronous sIPSCs in synchronous neuron pairs. Synchronicity of sIPSCs did not depend on the distance of neuron pairs. These results suggest that layer II/III pyramidal neurons receive synchronous inhibitory synaptic inputs generated by a certain type of GABAergic interneuron that induces large IPSCs in pyramidal neurons, likely to be fast-spiking cells.
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Affiliation(s)
- Kiyofumi Yamamoto
- Department of Pharmacology, Nihon University School of Dentistry, 1-8-13 Kanda-Surugadai, Chiyoda-ku, Tokyo 101-8310, Japan; Division of Oral and Craniomaxillofacial Research, Dental Research Center, Nihon University School of Dentistry, 1-8-13 Kanda-Surugadai, Chiyoda-ku, Tokyo 101-8310, Japan
| | - Yuka Nakaya
- Department of Pharmacology, Nihon University School of Dentistry, 1-8-13 Kanda-Surugadai, Chiyoda-ku, Tokyo 101-8310, Japan; Division of Oral and Craniomaxillofacial Research, Dental Research Center, Nihon University School of Dentistry, 1-8-13 Kanda-Surugadai, Chiyoda-ku, Tokyo 101-8310, Japan
| | - Shiori Sugawara
- Department of Pharmacology, Nihon University School of Dentistry, 1-8-13 Kanda-Surugadai, Chiyoda-ku, Tokyo 101-8310, Japan; Division of Oral and Craniomaxillofacial Research, Dental Research Center, Nihon University School of Dentistry, 1-8-13 Kanda-Surugadai, Chiyoda-ku, Tokyo 101-8310, Japan
| | - Masayuki Kobayashi
- Department of Pharmacology, Nihon University School of Dentistry, 1-8-13 Kanda-Surugadai, Chiyoda-ku, Tokyo 101-8310, Japan; Division of Oral and Craniomaxillofacial Research, Dental Research Center, Nihon University School of Dentistry, 1-8-13 Kanda-Surugadai, Chiyoda-ku, Tokyo 101-8310, Japan.
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17
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Affiliation(s)
- Masayuki Kobayashi
- Department of Pharmacology, Nihon University School of Dentistry
- Division of Oral and Craniomaxillofacial Research, Dental Research Center, Nihon University School of Dentistry
- Molecular Imaging Research Center, Riken
| | - Yuka Nakaya
- Department of Pharmacology, Nihon University School of Dentistry
- Division of Oral and Craniomaxillofacial Research, Dental Research Center, Nihon University School of Dentistry
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18
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Zama M, Fujita S, Nakaya Y, Tonogi M, Kobayashi M. Preceding Administration of Minocycline Suppresses Plastic Changes in Cortical Excitatory Propagation in the Model Rat With Partial Infraorbital Nerve Ligation. Front Neurol 2019; 10:1150. [PMID: 31749758 PMCID: PMC6848061 DOI: 10.3389/fneur.2019.01150] [Citation(s) in RCA: 7] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2019] [Accepted: 10/14/2019] [Indexed: 01/02/2023] Open
Abstract
Neuropathic pain is known to be attributable to the injured nerve, a postoperative problem induced by surgery. The infraorbital nerve (ION), a branch of the trigeminal nerve, innervates to the facial and oral regions and conveys somatosensory information to the central nervous system. The partial ligation of ION (pl-ION) is a method to mimic chronic trigeminal neuropathic pain and behavioral abnormality. To counteract induction of such abnormal pain, the effective pharmacological treatment is desired. Although recent studies have revealed the molecular mechanisms regarding chronic pain, estimation of the effectiveness of the pharmacological treatment has not been well-provided especially in the central nervous system so far. Here we examined whether pl-ION induces plastic changes in the cerebral cortex and investigated effects of minocycline on the cortical plastic changes. We performed the pl-ION to Wistar male rats (4–5 weeks old), and confirmed a mechanical nocifensive behavior in response to the mechanical stimulation with von-Frey filaments. The withdrawal threshold to mechanical stimuli of the whisker pad was decreased 1 day (1 d) after pl-ION, which continued up to 14 d after pl-ION, suggesting that pl-ION model rats presented allodynia and enhanced the response sustained at least for 14 d after pl-ION. Next, cerebrocortical activities were evaluated 3 d after pl-ION (3d-pl-ION) by the optical imaging with a voltages-sensitive dye, RH1691, to quantify the response to electrical stimulation of the whisker pad skin, mandibular molar dental pulp, and mentum skin. Electrical stimulation to the whisker pad skin induced smaller excitation in the primary sensory cortex (S1) of 3d-pl-ION in comparison to that in the sham. In contrast, cerebral cortical responses to the mandibular molar dental pulp and mentum skin stimuli increased both in S1, and the secondary somatosensory and insular oral region (S2/IOR) after pl-ION. Administration of minocycline (30 mg/kg/d) from 1 d before to 2 d after pl-ION partially recovered the pl-ION-induced changes in cortical excitation in S1 and S2/IOR in 3d-pl-ION. These results suggest that somatosensory and insular cortical excitation is changed by pl-ION, and the preceding injection of minocycline counteracts the plastic changes in the cortical activities.
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Affiliation(s)
- Manabu Zama
- Department of Pharmacology, Nihon University School of Dentistry, Tokyo, Japan.,Department of Oral and Maxillofacial Surgery, Nihon University School of Dentistry, Tokyo, Japan
| | - Satoshi Fujita
- Department of Pharmacology, Nihon University School of Dentistry, Tokyo, Japan.,Division of Oral and Craniomaxillofacial Research, Dental Research Center, Nihon University School of Dentistry, Tokyo, Japan
| | - Yuka Nakaya
- Department of Pharmacology, Nihon University School of Dentistry, Tokyo, Japan.,Division of Oral and Craniomaxillofacial Research, Dental Research Center, Nihon University School of Dentistry, Tokyo, Japan
| | - Morio Tonogi
- Department of Oral and Maxillofacial Surgery, Nihon University School of Dentistry, Tokyo, Japan.,Division of Oral and Craniomaxillofacial Research, Dental Research Center, Nihon University School of Dentistry, Tokyo, Japan
| | - Masayuki Kobayashi
- Department of Pharmacology, Nihon University School of Dentistry, Tokyo, Japan.,Division of Oral and Craniomaxillofacial Research, Dental Research Center, Nihon University School of Dentistry, Tokyo, Japan.,Molecular Dynamics Imaging Unit, RIKEN Center for Life Science Technologies, Kobe, Japan
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19
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Nakaya Y, Takahashi A, Inoue N, Taniguchi T, Ishikawa Y, Hijikata-Okunomiya A. Inhibitory Effect of Argatroban on Thrombin-induced MAP Kinase Activation. Thromb Haemost 2017. [DOI: 10.1055/s-0037-1615247] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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20
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Nakaya Y, Takaya M, Hinatsu Y, Alama T, Kusamori K, Katsumi H, Sakane T, Yamamoto A. Enhanced Oral Delivery of Bisphosphonate by Novel Absorption Enhancers: Improvement of Intestinal Absorption of Alendronate by N- Acyl Amino Acids and N- Acyl Taurates and Their Absorption-Enhancing Mechanisms. J Pharm Sci 2016; 105:3680-3690. [DOI: 10.1016/j.xphs.2016.09.004] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2016] [Revised: 08/29/2016] [Accepted: 09/01/2016] [Indexed: 11/29/2022]
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21
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Shinozaki T, Imamura Y, Kohashi R, Dezawa K, Nakaya Y, Sato Y, Watanabe K, Morimoto Y, Shizukuishi T, Abe O, Haji T, Tabei K, Taira M. Spatial and Temporal Brain Responses to Noxious Heat Thermal Stimuli in Burning Mouth Syndrome. J Dent Res 2016; 95:1138-46. [DOI: 10.1177/0022034516653580] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Burning mouth syndrome (BMS) is an idiopathic orofacial pain condition. Although the pathophysiology of BMS is not clearly understood, central and peripheral neuropathic mechanisms are thought to be involved. The authors compared brain response to noxious heat stimuli in 16 right-handed women with primary BMS and 15 sex- and age-matched right-handed healthy female controls. A thermal stimulus sequence of 32 °C to 40 °C to 32 °C to 49 °C was repeated 4 times in a cycle. Warm and noxious heat stimuli were delivered with a Peltier thermode placed on the right palm or right lower lip for 32 s each in a session. Functional magnetic resonance imaging data were obtained by recording echoplanar images with a block design. Statistical Parametric Mapping 8 software was used to analyze the data. Patients and controls both reported feeling more pain during palm stimulation than during lip stimulation. Repetition of noxious heat stimulus on the lower lip but not on the palm induced habituation in brain activity in the cingulate cortex without reduction in pain perception. Multiple regression analysis revealed a correlation between perceived pain intensity and suppression of brain activity in the anterior cingulate cortex when the repeated thermal sequence was applied at the lower lip. Furthermore, the response of the parahippocampal area differed in BMS patients and controls when the same repeated thermal sequence was applied at the palm. The authors’ findings indicate that BMS patients show specific brain responses due to impaired function of the central and peripheral nervous systems (clinical trial registration: UMIN000015002).
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Affiliation(s)
- T. Shinozaki
- Department of Oral Diagnostic Sciences, Nihon University School of Dentistry, Tokyo, Japan
- Clinical Research Division, Nihon University Dental Research Center, Tokyo, Japan
| | - Y. Imamura
- Department of Oral Diagnostic Sciences, Nihon University School of Dentistry, Tokyo, Japan
- Clinical Research Division, Nihon University Dental Research Center, Tokyo, Japan
| | - R. Kohashi
- Department of Oral Diagnostic Sciences, Nihon University School of Dentistry, Tokyo, Japan
| | - K. Dezawa
- Department of Oral Diagnostic Sciences, Nihon University School of Dentistry, Tokyo, Japan
| | - Y. Nakaya
- Department of Oral Diagnostic Sciences, Nihon University School of Dentistry, Tokyo, Japan
| | - Y. Sato
- Department of Oral Diagnostic Sciences, Nihon University School of Dentistry, Tokyo, Japan
| | - K. Watanabe
- Department of Oral Diagnostic Sciences, Nihon University School of Dentistry, Tokyo, Japan
| | - Y. Morimoto
- Division of Oral and Maxillofacial Radiology, Kyushu Dental University, Kitakyushu, Japan
| | - T. Shizukuishi
- Department of Radiology, Nihon University School of Medicine, Tokyo, Japan
| | - O. Abe
- Department of Radiology, Nihon University School of Medicine, Tokyo, Japan
| | - T. Haji
- Brain Activity Imaging Center, ATR-Promotions Inc., Osaka, Japan
| | - K. Tabei
- Department of Dementia Prevention and Therapeutics, Mie University Graduate School of Medicine, Tsu, Japan
| | - M. Taira
- Department of Cognitive Neurobiology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
- Center for Brain Integration Research, Tokyo Medical and Dental University, Tokyo, Japan
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22
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Nakaya Y, Tsuboi Y, Okada-Ogawa A, Shinoda M, Kubo A, Chen JY, Noma N, Batbold D, Imamura Y, Sessle BJ, Iwata K. ERK-GluR1 phosphorylation in trigeminal spinal subnucleus caudalis neurons is involved in pain associated with dry tongue. Mol Pain 2016; 12:12/0/1744806916641680. [PMID: 27118769 PMCID: PMC4956393 DOI: 10.1177/1744806916641680] [Citation(s) in RCA: 11] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2015] [Accepted: 02/03/2016] [Indexed: 11/15/2022] Open
Abstract
BACKGROUND Dry mouth is known to cause severe pain in the intraoral structures, and many dry mouth patients have been suffering from intraoral pain. In development of an appropriate treatment, it is crucial to study the mechanisms underlying intraoral pain associated with dry mouth, yet the detailed mechanisms are not fully understood. To evaluate the mechanisms underlying pain related to dry mouth, the dry-tongue rat model was developed. Hence, the mechanical or heat nocifensive reflex, the phosphorylated extracellular signal-regulated kinase and phosphorylated GluR1-IR immunohistochemistries, and the single neuronal activity were examined in the trigeminal spinal subnucleus caudalis of dry-tongue rats. RESULTS The head-withdrawal reflex threshold to mechanical, but not heat, stimulation of the tongue was significantly decreased on day 7 after tongue drying. The mechanical, but not heat, responses of trigeminal spinal subnucleus caudalis nociceptive neurons were significantly enhanced in dry-tongue rats compared to sham rats on day 7. The number of phosphorylated extracellular signal-regulated kinase-immunoreactive cells was also significantly increased in the trigeminal spinal subnucleus caudalis following noxious stimulation of the tongue in dry-tongue rats compared to sham rats on day 7. The decrement of the mechanical head-withdrawal reflex threshold (HWT) was reversed during intracisternal administration of the mitogen-activated protein kinase kinase 1 inhibitor, PD98059. The trigeminal spinal subnucleus caudalis neuronal activities and the number of phosphorylated extracellular signal-regulated kinase-immunoreactive cells following noxious mechanical stimulation of dried tongue were also significantly decreased following intracisternal administration of PD98059 compared to vehicle-administrated rats. Increased number of the phosphorylated GluR1-IR cells was observed in the trigeminal spinal subnucleus caudalis of dry-tongue rats, and the number of phosphorylated GluR1-IR cells was significantly reduced in PD98059-administrated rats compared to the vehicle-administrated tongue-dry rats. CONCLUSIONS These findings suggest that the pERK-pGluR1 cascade is involved in central sensitization of trigeminal spinal subnucleus caudalis nociceptive neurons, thus resulting in tongue mechanical hyperalgesia associated with tongue drying.
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Affiliation(s)
- Yuka Nakaya
- Department of Oral Diagnostic Sciences, Nihon University School of Dentistry, Chiyoda-ku, Tokyo, Japan
| | - Yoshiyuki Tsuboi
- Department of Physiology, Nihon University School of Dentistry, Chiyoda-ku, Tokyo, Japan
| | - Akiko Okada-Ogawa
- Department of Oral Diagnostic Sciences, Nihon University School of Dentistry, Chiyoda-ku, Tokyo, Japan
| | - Masamichi Shinoda
- Department of Physiology, Nihon University School of Dentistry, Chiyoda-ku, Tokyo, Japan
| | - Asako Kubo
- Department of Physiology, Nihon University School of Dentistry, Chiyoda-ku, Tokyo, Japan
| | - Jui Yen Chen
- Department of Physiology, Nihon University School of Dentistry, Chiyoda-ku, Tokyo, Japan
| | - Noboru Noma
- Department of Oral Diagnostic Sciences, Nihon University School of Dentistry, Chiyoda-ku, Tokyo, Japan
| | - Dulguun Batbold
- Department of Maxillofacial Surgery, Tokyo Medical and Dental University, Bunkyo-ku, Tokyo, Japan
| | - Yoshiki Imamura
- Department of Oral Diagnostic Sciences, Nihon University School of Dentistry, Chiyoda-ku, Tokyo, Japan
| | - Barry J Sessle
- Department of Oral Physiology, Faculty of Dentistry, University of Toronto, Toronto, Canada
| | - Koichi Iwata
- Department of Physiology, Nihon University School of Dentistry, Chiyoda-ku, Tokyo, Japan
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Hara K, Shinozaki T, Okada-Ogawa A, Matsukawa Y, Dezawa K, Nakaya Y, Chen JY, Noma N, Oka S, Iwata K, Imamura Y. Headache attributed to temporomandibular disorders and masticatory myofascial pain. J Oral Sci 2016; 58:195-204. [DOI: 10.2334/josnusd.15-0491] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
Affiliation(s)
- Kazuhiko Hara
- Department of Oral Diagnostic Sciences, Nihon University School of Dentistry
- Division of Orofacial Pain Clinic, Nihon University Dental Hospital
| | - Takahiro Shinozaki
- Department of Oral Diagnostic Sciences, Nihon University School of Dentistry
- Division of Orofacial Pain Clinic, Nihon University Dental Hospital
- Division of Clinical Research, Dental Research Center, Nihon University School of Dentistry
| | - Akiko Okada-Ogawa
- Department of Oral Diagnostic Sciences, Nihon University School of Dentistry
- Division of Orofacial Pain Clinic, Nihon University Dental Hospital
- Division of Clinical Research, Dental Research Center, Nihon University School of Dentistry
| | - Yumiko Matsukawa
- Department of Oral Diagnostic Sciences, Nihon University School of Dentistry
- Division of Orofacial Pain Clinic, Nihon University Dental Hospital
| | - Ko Dezawa
- Department of Oral Diagnostic Sciences, Nihon University School of Dentistry
- Division of Orofacial Pain Clinic, Nihon University Dental Hospital
| | - Yuka Nakaya
- Department of Oral Diagnostic Sciences, Nihon University School of Dentistry
- Division of Orofacial Pain Clinic, Nihon University Dental Hospital
| | - Jui-Yen Chen
- Department of Physiology, Nihon University School of Dentistry
| | - Noboru Noma
- Department of Oral Diagnostic Sciences, Nihon University School of Dentistry
- Division of Orofacial Pain Clinic, Nihon University Dental Hospital
- Division of Clinical Research, Dental Research Center, Nihon University School of Dentistry
| | - Shunichi Oka
- Division of Orofacial Pain Clinic, Nihon University Dental Hospital
- Department of Anesthesiology, Nihon University School of Dentistry
| | - Koichi Iwata
- Department of Physiology, Nihon University School of Dentistry
| | - Yoshiki Imamura
- Department of Oral Diagnostic Sciences, Nihon University School of Dentistry
- Division of Orofacial Pain Clinic, Nihon University Dental Hospital
- Division of Clinical Research, Dental Research Center, Nihon University School of Dentistry
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Osanai T, Shirai T, Iijima H, Nakaya Y, Okamoto M, Kondo A, Hirai MY. Genetic manipulation of a metabolic enzyme and a transcriptional regulator increasing succinate excretion from unicellular cyanobacterium. Front Microbiol 2015; 6:1064. [PMID: 26500619 PMCID: PMC4594341 DOI: 10.3389/fmicb.2015.01064] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.8] [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: 08/21/2015] [Accepted: 09/15/2015] [Indexed: 11/13/2022] Open
Abstract
Succinate is a building block compound that the U.S. Department of Energy (DOE) has declared as important in biorefineries, and it is widely used as a commodity chemical. Here, we identified the two genes increasing succinate production of the unicellular cyanobacterium Synechocystis sp. PCC 6803. Succinate was excreted under dark, anaerobic conditions, and its production level increased by knocking out ackA, which encodes an acetate kinase, and by overexpressing sigE, which encodes an RNA polymerase sigma factor. Glycogen catabolism and organic acid biosynthesis were enhanced in the mutant lacking ackA and overexpressing sigE, leading to an increase in succinate production reaching five times of the wild-type levels. Our genetic and metabolomic analyses thus demonstrated the effect of genetic manipulation of a metabolic enzyme and a transcriptional regulator on succinate excretion from this cyanobacterium with the data based on metabolomic technique.
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Affiliation(s)
- Takashi Osanai
- RIKEN Center for Sustainable Resource Science Yokohama, Japan ; Department of Agricultural Chemistry, School of Agriculture, Meiji University Kawasaki, Japan
| | | | - Hiroko Iijima
- RIKEN Center for Sustainable Resource Science Yokohama, Japan ; Department of Agricultural Chemistry, School of Agriculture, Meiji University Kawasaki, Japan
| | - Yuka Nakaya
- RIKEN Center for Sustainable Resource Science Yokohama, Japan ; Biomass Engineering Program, RIKEN Yokohama, Japan
| | - Mami Okamoto
- Biomass Engineering Program, RIKEN Yokohama, Japan
| | - Akihiko Kondo
- Biomass Engineering Program, RIKEN Yokohama, Japan ; Department of Chemical Science and Engineering, Graduate School of Engineering, Kobe University Kobe, Japan
| | - Masami Y Hirai
- RIKEN Center for Sustainable Resource Science Yokohama, Japan
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Kiyomoto M, Shinoda M, Honda K, Nakaya Y, Dezawa K, Katagiri A, Kamakura S, Inoue T, Iwata K. p38 phosphorylation in medullary microglia mediates ectopic orofacial inflammatory pain in rats. Mol Pain 2015; 11:48. [PMID: 26260484 PMCID: PMC4531532 DOI: 10.1186/s12990-015-0053-y] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [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: 04/16/2015] [Accepted: 08/03/2015] [Indexed: 12/22/2022] Open
Abstract
Background Orofacial inflammatory pain is likely to accompany referred pain in uninflamed orofacial structures. The ectopic pain precludes precise diagnosis and makes treatment problematic, because the underlying mechanism is not well understood. Using the established ectopic orofacial pain model induced by complete Freund’s adjuvant (CFA) injection into trapezius muscle, we analyzed the possible role of p38 phosphorylation in activated microglia in ectopic orofacial pain. Results Mechanical allodynia in the lateral facial skin was induced following trapezius muscle inflammation, which accompanied microglial activation with p38 phosphorylation and hyperexcitability of wide dynamic range (WDR) neurons in the trigeminal spinal subnucleus caudalis (Vc). Intra-cisterna successive administration of a p38 mitogen-activated protein kinase selective inhibitor, SB203580, suppressed microglial activation and its phosphorylation of p38. Moreover, SB203580 administration completely suppressed mechanical allodynia in the lateral facial skin and enhanced WDR neuronal excitability in Vc. Microglial interleukin-1β over-expression in Vc was induced by trapezius muscle inflammation, which was significantly suppressed by SB203580 administration. Conclusions These findings indicate that microglia, activated via p38 phosphorylation, play a pivotal role in WDR neuronal hyperexcitability, which accounts for the mechanical hypersensitivity in the lateral facial skin associated with trapezius muscle inflammation.
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Affiliation(s)
- Masaaki Kiyomoto
- Department of Oral Physiology, Showa University School of Dentistry, 1-5-8 Hatanodai, Shinagawa-ku, Tokyo, 142-8555, Japan.
| | - Masamichi Shinoda
- Department of Physiology, Nihon University School of Dentistry, 1-8-13 Kandasurugadai, Chiyoda-ku, Tokyo, 101-8310, Japan.
| | - Kuniya Honda
- Department of Physiology, Nihon University School of Dentistry, 1-8-13 Kandasurugadai, Chiyoda-ku, Tokyo, 101-8310, Japan.
| | - Yuka Nakaya
- Department of Oral Diagnostic Sciences, Nihon University School of Dentistry, 1-8-13 Kandasurugadai, Chiyoda-ku, Tokyo, 101-8310, Japan.
| | - Ko Dezawa
- Department of Oral Diagnostic Sciences, Nihon University School of Dentistry, 1-8-13 Kandasurugadai, Chiyoda-ku, Tokyo, 101-8310, Japan.
| | - Ayano Katagiri
- Department of Physiology, Nihon University School of Dentistry, 1-8-13 Kandasurugadai, Chiyoda-ku, Tokyo, 101-8310, Japan.
| | - Satoshi Kamakura
- Department of Physiology, Nihon University School of Dentistry, 1-8-13 Kandasurugadai, Chiyoda-ku, Tokyo, 101-8310, Japan.
| | - Tomio Inoue
- Department of Oral Physiology, Showa University School of Dentistry, 1-5-8 Hatanodai, Shinagawa-ku, Tokyo, 142-8555, Japan.
| | - Koichi Iwata
- Department of Physiology, Nihon University School of Dentistry, 1-8-13 Kandasurugadai, Chiyoda-ku, Tokyo, 101-8310, Japan.
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Iijima H, Nakaya Y, Kuwahara A, Hirai MY, Osanai T. Seawater cultivation of freshwater cyanobacterium Synechocystis sp. PCC 6803 drastically alters amino acid composition and glycogen metabolism. Front Microbiol 2015; 6:326. [PMID: 25954257 PMCID: PMC4406197 DOI: 10.3389/fmicb.2015.00326] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [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: 02/19/2015] [Accepted: 04/01/2015] [Indexed: 11/28/2022] Open
Abstract
Water use assessment is important for bioproduction using cyanobacteria. For eco-friendly reasons, seawater should preferably be used for cyanobacteria cultivation instead of freshwater. In this study, we demonstrated that the freshwater unicellular cyanobacterium Synechocystis sp. PCC 6803 could be grown in a medium based on seawater. The Synechocystis wild-type strain grew well in an artificial seawater (ASW) medium supplemented with nitrogen and phosphorus sources. The addition of HEPES buffer improved cell growth overall, although the growth in ASW medium was inferior to that in the synthetic BG-11 medium. The levels of proteins involved in sugar metabolism changed depending on the culture conditions. The biosynthesis of several amino acids including aspartate, glutamine, glycine, proline, ornithine, and lysine, was highly up-regulated by cultivation in ASW. Two types of natural seawater (NSW) were also made available for the cultivation of Synechocystis cells, with supplementation of both nitrogen and phosphorus sources. These results revealed the potential use of seawater for the cultivation of freshwater cyanobacteria, which would help to reduce freshwater consumption during biorefinery using cyanobacteria.
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Affiliation(s)
- Hiroko Iijima
- RIKEN Center for Sustainable Resource Science Yokohama, Japan
| | - Yuka Nakaya
- RIKEN Center for Sustainable Resource Science Yokohama, Japan
| | - Ayuko Kuwahara
- RIKEN Center for Sustainable Resource Science Yokohama, Japan
| | | | - Takashi Osanai
- RIKEN Center for Sustainable Resource Science Yokohama, Japan ; Advanced Low Carbon Technology Research and Development Program (ALCA), Japan Science and Technology Agency Kawaguchi, Japan ; School of Agriculture, Meiji University Tokyo, Japan
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Mitsuya K, Nakasu Y, Hayashi N, Harada H, Nishimura T, Ito I, Urikura A, Nakaya Y, Endo M. P16.22 * DIFFERENTIAL DIAGNOSIS OF TUMOR RECURRENCE AND RADIATION NECROSIS AFTER RADIOSURGERY FOR BRAIN METASTASES WITH 320-ROW AREA DETECTOR CT PERFUSION IMAGING. Neuro Oncol 2014. [DOI: 10.1093/neuonc/nou174.317] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Nakaya Y, Shide K, Naito H, Niwa T, Horio T, Miyake J, Shimoda K. Effect of NS-018, a selective JAK2V617F inhibitor, in a murine model of myelofibrosis. Blood Cancer J 2014; 4:e174. [PMID: 24413068 PMCID: PMC3913942 DOI: 10.1038/bcj.2013.73] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [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: 08/08/2013] [Revised: 11/14/2013] [Accepted: 12/05/2013] [Indexed: 12/21/2022] Open
Abstract
A single somatic mutation, V617F, in Janus kinase 2 (JAK2) is one of the causes of myeloproliferative neoplasms (MPNs), including primary myelofibrosis, and the JAK2V617F mutant kinase is a therapeutic target in MPN. However, inhibition of wild-type (WT) JAK2 can decrease the erythrocyte or platelet (PLT) count. Our selective JAK2 inhibitor, NS-018, suppressed the growth of Ba/F3 cells harboring JAK2V617F more strongly than that of cells harboring WT JAK2. The 4.3-fold JAK2V617F selectivity of NS-018 is higher than the 1.0- to 2.9-fold selectivity of seven existing JAK2 inhibitors. NS-018 also inhibited erythroid colony formation in JAK2V617F transgenic mice at significantly lower concentrations than in WT mice. In keeping with the above results, in a JAK2V617F bone marrow transplantation mouse model with a myelofibrosis-like disease, NS-018 reduced leukocytosis and splenomegaly, improved bone marrow fibrosis and prolonged survival without decreasing the erythrocyte or PLT count in the peripheral blood. By exploring the X-ray co-crystal structure of NS-018 bound to JAK2, we identified unique hydrogen-bonding interactions between NS-018 and Gly993 as a plausible explanation for its JAK2V617F selectivity. These results suggest that NS-018 will have therapeutic benefit for MPN patients through both its efficacy and its reduced hematologic adverse effects.
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Affiliation(s)
- Y Nakaya
- 1] Department of Mechanical Science and Bioengineering, Graduate School of Engineering Science, Osaka University, Osaka, Japan [2] Discovery Research Laboratories, Nippon Shinyaku Co. Ltd, Kyoto, Japan
| | - K Shide
- Department of Gastroenterology and Hematology, Faculty of Medicine, Miyazaki University, Miyazaki, Japan
| | - H Naito
- Discovery Research Laboratories, Nippon Shinyaku Co. Ltd, Kyoto, Japan
| | - T Niwa
- Discovery Research Laboratories, Nippon Shinyaku Co. Ltd, Kyoto, Japan
| | - T Horio
- Discovery Research Laboratories, Nippon Shinyaku Co. Ltd, Kyoto, Japan
| | - J Miyake
- Department of Mechanical Science and Bioengineering, Graduate School of Engineering Science, Osaka University, Osaka, Japan
| | - K Shimoda
- Department of Gastroenterology and Hematology, Faculty of Medicine, Miyazaki University, Miyazaki, Japan
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Murata J, Baba H, Behr J, Iguri T, Ikeda M, Kawamura H, Kishi R, Levy C, Nakaya Y, Narikawa R, Ninomiya K, Onishi J, Openshaw R, Pearson M, Seitaibashi E, Saiba S, Tanaka S, Tanuma R, Totsuka Y, Toyoda T. T-Violation experiment at TRIUMF-ISAC using polarized 8Li. EPJ Web of Conferences 2014. [DOI: 10.1051/epjconf/20146605017] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Nishimoto S, Fukuda D, Shimabukuro M, Matsumoto S, Ishida M, Yagi S, Soeki T, Sakaue H, Nakaya Y, Sata M. Genetic ablation of TLR9 improves insulin resistance through macrophage accumulation in adipose tissue. Eur Heart J 2013. [DOI: 10.1093/eurheartj/eht309.p3267] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Jörns A, Arndt T, Meyer zu Vilsendorf A, Klempnauer J, Wedekind D, Hedrich HJ, Marselli L, Marchetti P, Harada N, Nakaya Y, Wang GS, Scott FW, Gysemans C, Mathieu C, Lenzen S. Vergleich des Immunzellinfiltrats und des Zytokinmusters in Pankreasinseln von Tiermodellen des Typ 1 Diabetes mit der humanen Situation. DIABETOL STOFFWECHS 2013. [DOI: 10.1055/s-0033-1341732] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Noma N, Shinoda M, Honda K, Kiyomoto M, Dezawa K, Nakaya Y, Komiyama O, Imamura Y, Iwata K. Interaction of IL-1β and P2X(3) receptor in pathologic masseter muscle pain. J Dent Res 2013; 92:456-60. [PMID: 23520364 DOI: 10.1177/0022034513483770] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
The exact mechanism underlying chronic masseter muscle pain, a conspicuous symptom in temporomandibular disorder, remains unclear. We investigated whether expression of P2X3 receptor (P2X3R) is involved in mechanical hyperalgesia after contraction of masseter muscle (CMM). As compared with sham rats, the head-withdrawal threshold (HWT) to mechanical pressure stimulation of masseter muscle (MM) (but not after similar stimulation of facial skin) was significantly lower, and IL-1β level was significantly higher, in CMM rats on day 7 after CMM. The mean percentage of FG-labeled P2X3R-positive neurons was significantly increased in TG following successive IL-1β injections into the MM for 7 days. Successive administration of an IL-1β receptor-antagonist into the MM attenuated the increase of P2X3-IR cells in the TG. ATP release from MM after 300-g pressure stimulation of MM was also significantly enhanced after CMM. Administration into MM of the selective P2X3,2/3 receptor antagonist A-317491 attenuated the decrement of HWT in CMM rats. A significant increase in HWT was also observed at 30 min after A-317491 (60 µg) injection in IL-1β-injected rats. These findings suggest that P2X3R expression associated with enhanced IL-1β expression and ATP release in MM has a possible important role in MM mechanical hyperalgesia after excessive muscular contraction.
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Affiliation(s)
- N Noma
- Department of Oral Diagnostic Sciences, Nihon University School of Dentistry, Tokyo, Japan.
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Noma N, Kamo H, Nakaya Y, Dezawa K, Young A, Khan J, Imamura Y. Stellate Ganglion Block as an Early Intervention in Sympathetically Maintained Headache and Orofacial Pain Caused by Temporal Arteritis. Pain Med 2013; 14:392-7. [DOI: 10.1111/pme.12040] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Nazari H, Khaleghian A, Takahashi A, Harada N, Webster NJG, Nakano M, Kishi K, Ebina Y, Nakaya Y. Cortactin, an actin binding protein, regulates GLUT4 translocation via actin filament remodeling. Biochemistry (Mosc) 2012; 76:1262-9. [PMID: 22117553 DOI: 10.1134/s0006297911110083] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Insulin regulates glucose uptake into fat and skeletal muscle cells by modulating the translocation of GLUT4 between the cell surface and interior. We investigated a role for cortactin, a cortical actin binding protein, in the actin filament organization and translocation of GLUT4 in Chinese hamster ovary (CHO-GLUT4myc) and L6-GLUT4myc myotube cells. Overexpression of wild-type cortactin enhanced insulin-stimulated GLUT4myc translocation but did not alter actin fiber formation. Conversely, cortactin mutants lacking the Src homology 3 (SH3) domain inhibited insulin-stimulated formation of actin stress fibers and GLUT4 translocation similar to the actin depolymerizing agent cytochalasin D. Wortmannin, genistein, and a PP1 analog completely blocked insulin-induced Akt phosphorylation, formation of actin stress fibers, and GLUT4 translocation indicating the involvement of both PI3-K/Akt and the Src family of kinases. The effect of these inhibitors was even more pronounced in the presence of overexpressed cortactin suggesting that the same pathways are involved. Knockdown of cortactin by siRNA did not inhibit insulin-induced Akt phosphorylation but completely inhibited actin stress fiber formation and glucose uptake. These results suggest that the actin binding protein cortactin is required for actin stress fiber formation in muscle cells and that this process is absolutely required for translocation of GLUT4-containing vesicles to the plasma membrane.
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Affiliation(s)
- H Nazari
- Department of Nutrition and Metabolism, Institute of Health Biosciences, University of Tokushima Graduate School, Tokushima, Japan
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Hamamoto A, Mori M, Takahashi A, Nakano M, Wakikawa N, Akutagawa M, Ikehara T, Nakaya Y, Kinouchi Y. New water disinfection system using UVA light-emitting diodes. J Appl Microbiol 2007; 103:2291-8. [DOI: 10.1111/j.1365-2672.2007.03464.x] [Citation(s) in RCA: 120] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Abstract
AIMS To evaluate the effect of norepinephrine (NE) and related compounds on the growth of bacteria, we have examined the effect of the neuroendocrine hormone NE and related compounds on the growth of Vibrio parahaemolyticus and other human-pathogenic Vibrio species (Vibrio cholerae, Vibrio vulnificus, and Vibrio mimicus). METHODS AND RESULTS The effects on bacterial growth were examined using the serum-based medium and viable cells were counted using agar plates. We have shown that NE and its related compounds stimulate growth of V. parahaemolyticus in serum-based medium. This NE-induced growth stimulation was dependent upon the presence of transferrin. NE also stimulated growth of V. mimicus, but not V. cholerae and V. vulnificus. CONCLUSIONS These results suggest that the Vibrio species differ in their ability to respond to NE. SIGNIFICANCE AND IMPACT OF THE STUDY It is possible that NE and related compounds modulate the pathogenicity of V. parahaemolyticus and V. mimicus.
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Affiliation(s)
- M Nakano
- Department of Nutrition and Metabolism, Institute of Health Biosciences, The University of Tokushima Graduate School, Tokushima, Japan
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Nomura M, Uehara K, Harada K, Uemura E, Iga A, Kawano T, Nishikado A, Saito K, Nakaya Y, Ito S. Impairment of gastrointestinal motility by nitrate administration: evaluation based on electrogastrographic changes and autonomic nerve activity. Aliment Pharmacol Ther 2004; 20 Suppl 1:118-24. [PMID: 15298617 DOI: 10.1111/j.1365-2036.2004.01979.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [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] [Indexed: 12/29/2022]
Abstract
BACKGROUND Nitrates decrease the tone of the lower oesophageal sphincter, and may thus induce gastro-oesophageal reflux. AIM In the present study, we evaluated electrogastrographic changes and heart-rate variability before and after the administration of nitrates. METHODS In 15 patients with chest pain treated with nitrates, electrocardiography and percutaneous electrogastrography were performed before and after administration of nitrates. Autonomic nervous system function was evaluated by spectral analysis of heart-rate variability and serial changes in low frequency and high frequency power, and the low frequency/high frequency ratio were compared. Electrogastrograms were analysed by obtaining peak power amplitudes and their dominant frequencies. RESULTS After the administration of nitrates (isosorbide dinitrate), high frequency power, an index of parasympathetic nervous activity, was significantly decreased, whereas the low frequency/high frequency ratio, an index of sympathetic nervous activity, was significantly increased. The mean peak amplitude of the electrogastrogram significantly increased postprandially both before and after treatment. After isosorbide dinitrate treatment, however, mean peak amplitudes after a meal were significantly lower than those obtained before treatment. The mean dominant frequency of the electrogastrogram did not vary before and after treatment. CONCLUSIONS The present study suggests that nitrates inhibit gastrointestinal motility by decreasing autonomic nervous activity.
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Affiliation(s)
- M Nomura
- Department of Digestive Medicine, School of Medicine, Graduate School University of Tokushima, Tokushima, Japan.
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Kishi F, Nomura M, Uemura E, Kageyama N, Kujime S, Kaji M, Noda Y, Kondo N, Kawaguchi T, Ozaki Y, Koshiba K, Yamaguchi K, Nakaya Y, Ito S. Evaluation of myocardial sympathetic nerve function in patients with mitral valve prolapse using iodine-123-metaiodobenzylguanidine myocardial scintigraphy. J Med 2004; 35:187-199. [PMID: 18084877] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Mitral valve prolapse (MVP) is closely related to myocardial sympathetic nerve function. This study evaluated the presence of impaired myocardial sympathetic nerve function by Iodine-123-metaiodobenzylguanidine (MIBG) scintigraphy in ten patients with MVP. For comparison, 15 healthy subjects without heart disease were investigated (control group). Single photon emission computed tomography (SPECT) and anterior planar myocardial scintigraphy were performed 15 min (initial images) and 3 hours (delayed images) after injection of MIBG (111 MBq). The location and degrees of reduced tracer uptake were evaluated. Myocardial MIBG uptake was quantified by uptake ratio of the heart (H) to upper mediastinum (M) on the anterior planar images (H/M). Percentage washout of MIBG in nine sectors of all oblique slices along the short-axis was calculated. The washout rates were higher at the inferoposterior and septal segments in patients with anterior leaflet prolapse, and at inferoposterior and lateral segments in patients with posterior leaflet prolapse. The bull's eye map showed increased washout rate in the apical and posteroseptal basal segments. There was no significant difference in the H/M ratio between MVP patients and the control group. These results indicate that MIBG can be used to evaluate localized myocardial sympathetic nerve function in MVP.
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Affiliation(s)
- F Kishi
- Department of Digestive and Cardiovascular Medicine, University of Tokushima Graduate School, Tokushima 770-8053, Japan
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Uemura N, Nomura M, Inoue S, Endo J, Kishi S, Saito K, Ito S, Nakaya Y. Changes in hemodynamics and autonomic nervous activity in patients undergoing laparoscopic cholecystectomy: differences between the pneumoperitoneum and abdominal wall-lifting method. Endoscopy 2002; 34:643-50. [PMID: 12173086 DOI: 10.1055/s-2002-33252] [Citation(s) in RCA: 20] [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] [Indexed: 12/13/2022]
Abstract
BACKGROUND AND STUDY AIMS Intraoperative changes in circulatory hemodynamics and autonomic nervous activity were evaluated in 33 patients with cholelithiasis who underwent laparoscopic cholecystectomy. PATIENTS AND METHODS Of these patients, 18 were treated using a pneumoperitoneum (group G) and 15 using the abdominal wall-lifting method (group WL). Their ECG, blood pressure, arterial oxygen saturation, and expiratory carbon dioxide partial pressure were monitored. Autonomic nervous function was evaluated by spectral analysis of the heart rate. RESULTS Mean blood pressure increased significantly in group G during surgery, but did not vary in group WL during any stage of surgery. The high-frequency (HF) power, an index of parasympathetic activity, decreased significantly in group G after pneumoperitoneum. However, the HF power did not decrease significantly in group WL. The LF/HF ratio, an index of sympathetic activity, increased significantly in group G after pneumoperitoneum, but did not vary in group WL. In addition, the incidence of ventricular or supraventricular arrhythmias and the severity of the arrhythmias as determined by Lown's classification were higher in group G than in group WL. These findings suggest that intraoperative changes in autonomic nervous activity, due to increased intra-abdominal pressure, were smaller in patients undergoing laparoscopic cholecystectomy using the abdominal wall-lifting method than in those undergoing laparoscopic cholecystectomy using pneumoperitoneum. The results also demonstrated that hemodynamic changes were smaller in patients undergoing the abdominal wall-lifting method than in those undergoing pneumoperitoneum. CONCLUSIONS It was concluded that hemodynamics should be carefully monitored during pneumoperitoneum, and that the abdominal wall-lifting approach in laparoscopic cholecystectomy is a method worthy of consideration for elderly patients or those with cardiopulmonary complications.
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Affiliation(s)
- N Uemura
- Department of Gastroenterology, National Kochi Hospital, Kochi, Japan
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Oura R, Nomura M, Nakaya Y, Shichijyo S, Ito S. Evaluation of the total health promotion plan in Japan, as related to health promotion effects and the prevention of lifestyle-related diseases. J Med 2002; 32:365-79. [PMID: 11958281] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/24/2023]
Abstract
The present study was undertaken to investigate whether health-promoting activities in Japan are useful for preventing the development of lifestyle-related diseases and for promoting health. One thousand, one hundred and sixty-seven Japanese workers were given a medical health check and had their maximum oxygen uptake measured according to the total health promotion plan (THP) protocol, which the Japanese Ministry of Health, Labor and Welfare is actively planning. Correlations between the maximum oxygen uptake and performance on health check items were statistically evaluated. The maximum oxygen uptake was positively correlated with the duration of a worker's ability to stand on one leg, and on the frequency with which they performed upper body weight lifting. In addition, the maximum oxygen uptake was negatively correlated with age, body weight, thickness of subcutaneous fat in the upper arms and shoulders, body fat ratios, body mass index (BMI), maximum and minimum blood pressures, resting heart rates, and total cholesterol levels. Moreover, the maximum oxygen uptake tended to be significantly higher in both male and female subjects who exercised regularly. It is suggested that maximum oxygen uptake and regular exercising play important roles in the inhibition of risk factors for ischemic heart diseases. Therefore, we believe the THP can play an important role in the primary prevention of lifestyle-related diseases. The purpose of the THP in Japan is to promote the achievement of healthy lifestyles in individual subjects, both from mental and physical perspectives. These results suggest that such efforts may help prevent the development of lifestyle-related diseases.
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Affiliation(s)
- R Oura
- Second Department of Internal Medicine, Tokushima Industrial Promotion Center, University of Tokushima, Japan
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Katoh K, Nomura M, Nakaya Y, Iga A, Nada T, Hiasa A, Ochi Y, Kawaguchi R, Uemura N, Honda H, Shimizu I, Ito S. Autonomic nervous activity before and after eradication of Helicobacter pylori in patients with chronic duodenal ulcer. Aliment Pharmacol Ther 2002; 16 Suppl 2:180-6. [PMID: 11966539 DOI: 10.1046/j.1365-2036.16.s2.27.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [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] [Indexed: 01/26/2023]
Abstract
BACKGROUND Helicobacter pylori infection is involved in the formation of chronic peptic ulcer. However, a previously reported hypothesis concerning the involvement of central autonomic nervous disorder in this condition cannot be ruled out. AIM To use spectrum analysis of heart rate viability to examine autonomic nervous activity before and after H. pylori eradication. METHODS Twenty patients with chronic duodenal ulcer (duodenal ulcer group) and 20 age-matched normal adults (N group). In both groups, 24-h Holter electrocardiograms (ECGs) were recorded and spectrum analysis of heartrate variability was performed. In the duodenal ulcer group, Holter ECG was recorded before and after H. pylori eradication. RESULTS In the N group, analysis of heart rate variability showed that high frequency (HF) power, an index of parasympathetic activity, was high at night, while the low frequency (LF)/HF ratio, an index of sympathetic function, was high during the daytime. In the duodenal ulcer group, HF power was higher at night than during the daytime, showing a similar pattern to the N group, but the power value was higher than in the N group (P < 0.05). In the duodenal ulcer group, LF/HF at night was significantly higher than that of the N group. In addition, in the duodenal ulcer group, autonomic activity after H. pylori eradication did not differ significantly from that before H. pylori eradication. CONCLUSIONS In patients with chronic peptic ulcer, both sympatheticotonia and parasympatheticotonia may occur at night, and this abnormality in autonomic nervous activity may cause increased gastric acid secretion and gastric mucosal vasoconstriction. Abnormalities in autonomic activity persist even after H. pylori eradication, suggesting that they may be an independent risk factor in the formation of chronic peptic ulcer in addition to H. pylori infection.
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Affiliation(s)
- K Katoh
- Second Department of Internal Medicine, and Department of Nutrition, School of Medicine, University of Tokushima, Kuramoto-Cho, Tokushima, Japan
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Abstract
A complete cDNA clone of the Newcastle disease virus (NDV) vaccine strain Hitchner B1 was constructed, and infectious recombinant virus expressing an influenza virus hemagglutinin was generated by reverse genetics. The rescued virus induces a strong humoral antibody response against influenza virus and provides complete protection against a lethal dose of influenza virus challenge in mice, demonstrating the potential of recombinant NDV as a vaccine vector.
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Affiliation(s)
- T Nakaya
- Department of Microbiology, Mount Sinai School of Medicine, New York, New York 10029, USA
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Li M, Marubayashi A, Nakaya Y, Fukui K, Arase S. Minoxidil-induced hair growth is mediated by adenosine in cultured dermal papilla cells: possible involvement of sulfonylurea receptor 2B as a target of minoxidil. J Invest Dermatol 2001; 117:1594-600. [PMID: 11886528 DOI: 10.1046/j.0022-202x.2001.01570.x] [Citation(s) in RCA: 61] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
The mechanism by which minoxidil, an adenosine-triphosphate-sensitive potassium channel opener, induces hypertrichosis remains to be elucidated. Minoxidil has been reported to stimulate the production of vascular endothelial growth factor, a possible promoter of hair growth, in cultured dermal papilla cells. The mechanism of production of vascular endothelial growth factor remains unclear, however. We hypothesize that adenosine serves as a mediator of vascular endothelial growth factor production. Minoxidil-induced increases in levels of intracellular Ca(2+) and vascular endothelial growth factor production in cultured dermal papilla cells were found to be inhibited by 8-sulfophenyl theophylline, a specific antagonist for adenosine receptors, suggesting that dermal papilla cells possess adenosine receptors and sulfonylurea receptors, the latter of which is a well-known target receptor for adenosine-triphosphate-sensitive potassium channel openers. The expression of sulfonylurea receptor 2B and of the adenosine A1, A2A, and A2B receptors was detected in dermal papilla cells by means of reverse transcription polymerase chain reaction analysis. In order to determine which of the adenosine receptor subtypes contribute to minoxidil-induced hair growth, the effects of subtype-specific antagonists for adenosine receptors were investigated. Significant inhibition in increase in intracellular calcium level by minoxidil or adenosine was observed as the result of pretreatment with 8-cyclopentyl-1,3-dipropylxanthine, an antagonist for adenosine A1 receptor, but not by 3,7-dimethyl-1-propargyl-xanthine, an antagonist for adenosine A2 receptor, whereas vascular endothelial growth factor production was blocked by both adenosine A1 and A2 receptor antagonists. These results indicate that the effect of minoxidil is mediated by adenosine, which triggers intracellular signal transduction via both adenosine A1 and A2 receptors, and that the expression of sulfonylurea receptor 2B in dermal papilla cells might play a role in the production of adenosine.
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Affiliation(s)
- M Li
- Department of Dermatology, School of Medicine, The University of Tokushima, Tokushima, Japan
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Shinkawa K, Sone S, Takahashi A, Maeda K, Tanoue N, Nakaya Y. [Effects of erythromycin and clarithromycin on chloride channels in bronchial epithelial cells]. Jpn J Antibiot 2001; 54 Suppl C:59-62. [PMID: 12575420] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/28/2023]
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Takahashi A, Wada A, Ogushi K, Maeda K, Kawahara T, Mawatari K, Kurazono H, Moss J, Hirayama T, Nakaya Y. Production of beta-defensin-2 by human colonic epithelial cells induced by Salmonella enteritidis flagella filament structural protein. FEBS Lett 2001; 508:484-8. [PMID: 11728477 DOI: 10.1016/s0014-5793(01)03088-5] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
We recently showed that FliC of Salmonella enteritidis increased human beta-defensin-2 (hBD-2) expression, and now describe the signaling responsible pathway. FliC increased the intracellular Ca(2+) concentration ([Ca(2+)](in)) in Caco-2 cells. The [Ca(2+)](in) increase induced by FliC was prevented by U73122 and heparin, but not by chelating extracellular Ca(2+) or pertussis toxin. The FliC-induced increase in hBD-2 promoter activity via nuclear factor kappaB (NF-kappaB) was also inhibited by chelation of intracellular Ca(2+) or by U73122. We conclude that FliC increased [Ca(2+)](in) via inositol 1,4,5-trisphosphate, which was followed by up-regulating hBD-2 mRNA expression via an NF-kappaB-dependent pathway.
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Affiliation(s)
- A Takahashi
- Department of Nutrition, School of Medicine, University of Tokushima, Japan.
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Ishizawa K, Yoshizumi M, Tsuchiya K, Takishita E, Nakaya Y, Kishi K, Ebina Y, Houchi H, Minakuchi K, Tamaki T. Effects of losartan in combination with or without exercise on insulin resistance in Otsuka Long-Evans Tokushima Fatty rats. Eur J Pharmacol 2001; 430:359-67. [PMID: 11711055 DOI: 10.1016/s0014-2999(01)01405-4] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Hypertension often complicates type 2 diabetes mellitus, and angiotensin converting enzyme inhibitor treatment has been shown to improve insulin resistance in such cases. However, the effect of angiotensin II type-1 (AT(1)) receptor antagonists on insulin resistance is still controversial. To gain further information on this effect, we examined the effect of losartan on insulin resistance in Otsuka Long-Evans Tokushima Fatty (OLETF) rats, a model of type 2 diabetes mellitus. Losartan administration alone lowered systolic blood pressure, but did not improve oral glucose tolerance test or insulin resistance in OLETF rats. However, the administration of losartan with exercise significantly improved both systolic blood pressure and insulin resistance relative to control OLETF rats. On the other hand, losartan treatment, regardless of exercise, increased glucose uptake in excised soleus muscle and fat cells. To explore the beneficial effect of losartan on skeletal muscle glucose uptake, we examined intracellular signaling of soleus muscle. Although Akt activity and glucose transporter type 4 (GLUT4) expressions were not affected by losartan with or without exercise, extracellular signal-regulated kinase (ERK1/2) and p38 mitogen-activated protein (MAP) kinase activities were increased by both interventions. These results indicate that angiotensin AT(1) receptor antagonist improved local insulin resistance, but not systemic insulin resistance. These findings may explain the controversy over the effect of angiotensin AT(1) receptor antagonists on insulin resistance in clinical use. The enhancing effect of angiotensin AT(1) receptor antagonist on skeletal muscle glucose uptake may be attributable to MAP kinase activation or other mechanisms rather than phosphatidylinositol 3-kinase activation.
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Affiliation(s)
- K Ishizawa
- Department of Pharmacology, University of Tokushima School of Medicine, 3-18-15 Kuramoto, 770-8503, Tokushima, Japan
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Saijo Y, Maeda K, Nakaya Y, Kamada M, Mitani R, Endo S, Irahara M, Yamano S, Aono T. Altered sensitivity to a novel vasoconstrictor endothelin-1 (1-31) in myometrium and umbilical artery of women with severe preeclampsia. Biochem Biophys Res Commun 2001; 286:964-7. [PMID: 11527394 DOI: 10.1006/bbrc.2001.5480] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
We have suggested that a novel endothelin-1 with 31 amino acids [ET-1 (1-31)] plays an important role in fetal circulation, owing to a strong contractile activity on the umbilical artery. To clarify the pathophysiological significance of ET-1 (1-31) in the development of severe preeclampsia, its contractile activities on human umbilical arteries and uterine smooth muscle from patients with preeclampsia were studied. The contraction by ET-1 (1-31) was stronger in uterine smooth muscle of the patients with severe preeclampsia than that of normal subjects. On the contrary, the constriction of umbilical artery of the patients with eclampsia was significantly weaker than that of normal pregnant women. The stronger contraction of myometrium by ET-1 (1-31) in patients with severe preeclampsia observed for the first time in the present study suggests that ET-1 (1-31) might be involved in the development of preeclampsia.
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Affiliation(s)
- Y Saijo
- Department of Obstetrics and Gynecology, University of Tokushima, Tokushima, 770-8503, Japan.
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Tsutsumi Y, Oshita S, Kawano T, Kitahata H, Tomiyama Y, Kuroda Y, Nakaya Y. Lidocaine and mexiletine inhibit mitochondrial oxidation in rat ventricular myocytes. Anesthesiology 2001; 95:766-70. [PMID: 11575552 DOI: 10.1097/00000542-200109000-00032] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
BACKGROUND Accumulating evidence suggests that mitochondrial rather than sarcolemmal adenosine triphosphate-sensitive K+ (K(ATP)) channels may have an important role in the protection of myocardium during ischemia. Because both lidocaine and mexiletine are frequently used antiarrhythmic drugs during myocardial ischemia, it is important to investigate whether they affect mitochondrial K(ATP) channel activities. METHODS Male Wistar rats were anesthetized with ether. Single, quiescent ventricular myocytes were dispersed enzymatically. The authors measured flavoprotein fluorescence to evaluate mitochondrial redox state. Lidocaine or mexiletine was applied after administration of diazoxide (25 microM), a selective mitochondrial K(ATP) channel opener. The redox signal was normalized to the baseline flavoprotein fluorescence obtained during exposure to 2,4-dinitrophenol, a protonophore that uncouples respiration from ATP synthesis and collapses the mitochondrial potential. RESULTS Diazoxide-induced oxidation of flavoproteins and the redox changes were inhibited by 5-hydroxydecanoic acid, a selective mitochondrial K(ATP) channel blocker, suggesting that flavoprotein fluorescence can be used as an index of mitochondrial oxidation mediated by mitochondrial K(ATP) channels. Lidocaine (10(-3) to 10 mM) and mexiletine (10(-3) to 10 mM) reduced oxidation of the mitochondrial matrix in a dose-dependent manner with an EC50 of 98+/-63 microM for lidocaine and 107+/-89 microM for mexiletine. CONCLUSIONS Both lidocaine and mexiletine reduced flavoprotein fluorescence induced by diazoxide in rat ventricular myocytes, indicating that these antiarrhythmic drugs may produce impairment of mitochondrial oxidation mediated by mitochondrial K(ATP) channels.
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Affiliation(s)
- Y Tsutsumi
- Department of Anesthesiology, Tokushima University School of Medicine, Japan.
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Nakamura T, Houchi H, Minami A, Sakamoto S, Tsuchiya K, Niwa Y, Minakuchi K, Nakaya Y. Endothelium-dependent relaxation by cilostazol, a phosphodiesteras III inhibitor, on rat thoracic aorta. Life Sci 2001; 69:1709-15. [PMID: 11665832 DOI: 10.1016/s0024-3205(01)01258-9] [Citation(s) in RCA: 58] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The relaxation effect of cilostazol, a phosphodiesterase III inhibitor, on the thoracic aorta was investigated. Cilostazol induced the relaxation of the thoracic aorta precontracted by phenylephrine in a concentration-dependent manner. The concentration-dependent relaxation was shifted to the right in the endothelium denuded aorta compared with that of intact endothelium, suggesting that this relaxation was partly dependent on endothelium. Cilostazol-induced relaxation of thoracic aorta tone was reversed by treatment with N(G)-nitro L-arginine (L-NNA), a competitive inhibitor of nitric oxide (NO) synthase. Cilostazol also significantly increased the NO level in the porcine thoracic aorta. In rats treated with cilostazol, the urinary excretion of nitrites, a stable metabolite of NO, and basal production of NO of the aortic ring were significantly greater than in those without treatment. These findings indicate that cilostazol-induced vasodilation of the rat thoracic aorta was dependent on the endothelium, which released NO from aortic endothelial cells.
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Affiliation(s)
- T Nakamura
- Department of Pharmacy, Tokushima University Hospital, Japan
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