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Yoshida S, Kazekawa K, Kamatani K, Maruyama K, Takigawa K, Tashiro N, Hashiguchi Y, Yasaka M, Aikawa H, Go Y. Prediction of obliteration of unruptured cerebral aneurysm by residual aneurysm volume after flow diverter stent treatment. World Neurosurg X 2024; 22:100354. [PMID: 38469386 PMCID: PMC10926355 DOI: 10.1016/j.wnsx.2024.100354] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2023] [Accepted: 02/21/2024] [Indexed: 03/13/2024] Open
Abstract
Introduction There is no methodology to predict aneurysm occlusion using residual volume after flow diverter stent treatment. We retrospectively examined whether residual aneurysm volume at 6 months postoperatively can predict the degree of aneurysm obliteration at 1 year after flow diverter stent treatment. Materials and Methods This single institution study included 101 consecutive patients who underwent flow diverter stent treatment for unruptured cerebral aneurysm. Based on pre-treatment aneurysm volume, the percentage residual volume was calculated 6 months postoperatively. The volume of the aneurysm was determined using the volume calculation function of the cerebral angiography equipment. 1 year postoperatively, patients were classified into two groups: the good obliteration group (GG; O'KellyMarotta [OKM] grading scale: C and D) and the poor obliteration group (PG; OKM: A and B). Statistical analysis was performed to determine if there was a difference in residual aneurysm volume percentage at 6 months postoperatively between the two groups. Results A total of 20 patients were studied: 6 in the GG and 14 in the PG. Mean residual aneurysm volume at 6 months postoperatively in the GG was 33.1% (±34.7), while that in the PG was 80.6% (±24.8) (P=0.018). A residual aneurysm volume of ≥35.2% at 6 months postoperatively was significantly associated with poor aneurysm obliteration at 1 year postoperatively (AUC=0.88, P=0.008). Conclusions Residual aneurysm volume percentage at 6 months after flow diverter stent treatment might be able to predict the likelihood of aneurysm occlusion at 1 year postoperatively.
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Affiliation(s)
- Shinichiro Yoshida
- Department of Neurosurgery, Fukuoka Neurosurgical Hospital, 5-3-1 Osa, Minamiku, Fukuoka, 811-1313, Japan
| | - Kiyoshi Kazekawa
- Department of Neurosurgery, Fukuoka Neurosurgical Hospital, 5-3-1 Osa, Minamiku, Fukuoka, 811-1313, Japan
| | - Kaisei Kamatani
- Department of Neurosurgery, Fukuoka Neurosurgical Hospital, 5-3-1 Osa, Minamiku, Fukuoka, 811-1313, Japan
| | - Kousei Maruyama
- Department of Neurosurgery, Fukuoka Neurosurgical Hospital, 5-3-1 Osa, Minamiku, Fukuoka, 811-1313, Japan
| | - Kousuke Takigawa
- Department of Neurosurgery, Fukuoka Neurosurgical Hospital, 5-3-1 Osa, Minamiku, Fukuoka, 811-1313, Japan
| | - Noriaki Tashiro
- Depatment of Cerebrovascular Medicine, Fukuoka Neurosurgical Hospital, 5-3-1 Osa, Minamiku, Fukuoka, 811-1313, Japan
| | - Yoshiya Hashiguchi
- Depatment of Cerebrovascular Medicine, Fukuoka Neurosurgical Hospital, 5-3-1 Osa, Minamiku, Fukuoka, 811-1313, Japan
| | - Masahiro Yasaka
- Depatment of Cerebrovascular Medicine, Fukuoka Neurosurgical Hospital, 5-3-1 Osa, Minamiku, Fukuoka, 811-1313, Japan
| | - Hiroshi Aikawa
- Department of Neurosurgery, Fukuoka Neurosurgical Hospital, 5-3-1 Osa, Minamiku, Fukuoka, 811-1313, Japan
| | - Yoshinori Go
- Department of Neurosurgery, Fukuoka Neurosurgical Hospital, 5-3-1 Osa, Minamiku, Fukuoka, 811-1313, Japan
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Kamatani K, Yoshida S, Tashiro N, Hashiguchi Y, Takigawa K, Yasaka M, Aikawa H, Go Y, Kazekawa K. The case of treatment for carotid web - Double-layer micromesh stent implantation in our hospital. Surg Neurol Int 2023; 14:339. [PMID: 37810295 PMCID: PMC10559414 DOI: 10.25259/sni_525_2023] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2023] [Accepted: 08/26/2023] [Indexed: 10/10/2023] Open
Abstract
Background A carotid web is a shelf-like structure on the posterior wall of the origin of the internal carotid artery, and it is believed to cause cerebral infarction due to thrombus formed by turbulent flow with stagnation of blood flow. Recently, it has been suggested that recurrent cerebral infarction cannot be prevented in patients with a symptomatic carotid web by conventional medical management alone. However, there is still no consensus on the treatment of carotid webs. Carotid artery stenting (CAS) with the CASPER stent (Microvention, Terumo, Tustin, CA, USA) was performed in six consecutive patients with symptomatic carotid webs, and the results are reported along with a review of the literature. Methods Six consecutive patients with a diagnosis of internal carotid artery stenosis due to a carotid web on magnetic resonance imaging and digital subtraction angiography (DSA) were included in this study. All patients underwent dual antiplatelet therapy approximately 10 days before surgery and after 6 months, and then, a CASPER stent was implanted under general anesthesia. All patients were evaluated postoperatively by DSA 6 months after treatment. Results In all patients, no in-stent stenosis was seen 6 months after the operation, and no symptomatic cerebral infarction occurred within 1 year after the procedure. Conclusions CASPER stent implantation may be effective for treating carotid webs.
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Affiliation(s)
- Kaisei Kamatani
- Department of Neurosurgery, Fukuoka Neurosurgical Hospital, Fukuoka, Japan
| | - Shinichiro Yoshida
- Department of Neurosurgery, Fukuoka Neurosurgical Hospital, Fukuoka, Japan
| | - Noriaki Tashiro
- Department of Cerebrovascular Medicine, Fukuoka Neurosurgical Hospital, Fukuoka, Japan
| | - Yoshiya Hashiguchi
- Department of Cerebrovascular Medicine, Fukuoka Neurosurgical Hospital, Fukuoka, Japan
| | - Kousuke Takigawa
- Department of Neurosurgery, Fukuoka Neurosurgical Hospital, Fukuoka, Japan
| | - Masahiro Yasaka
- Department of Cerebrovascular Medicine, Fukuoka Neurosurgical Hospital, Fukuoka, Japan
| | - Hiroshi Aikawa
- Department of Neurosurgery, Fukuoka Neurosurgical Hospital, Fukuoka, Japan
| | - Yoshinori Go
- Department of Neurosurgery, Fukuoka Neurosurgical Hospital, Fukuoka, Japan
| | - Kiyoshi Kazekawa
- Department of Neurosurgery, Fukuoka Neurosurgical Hospital, Fukuoka, Japan
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Yoshida S, Kamatani K, Takigawa K, Tashiro N, Hashiguchi Y, Yasaka M, Aikawa H, Go Y, Kazekawa K. Strategy of cerebral endovascular treatment for cervical internal carotid artery stenosis with a persistent primitive hypoglossal artery. Surg Neurol Int 2023; 14:308. [PMID: 37810314 PMCID: PMC10559564 DOI: 10.25259/sni_567_2023] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2023] [Accepted: 08/11/2023] [Indexed: 10/10/2023] Open
Abstract
Background Persistent primitive hypoglossal artery (PPHA) is a rare residual arterial anastomosis. We placed a CASPER stent using Spider FX as an embolic protection device (EPD) in a patient with internal carotid artery (ICA) stenosis and PPHA. There are no reports of carotid artery stenting (CAS) using a CASPER stent for ICA stenosis with PPHA. We report the EPD strategy used in this case and the usefulness and precautions of CASPER stent insertion for cervical ICA stenosis in association with PPHA. Methods A 9Fr sheath was placed in the right femoral artery and a 9Fr Branchor balloon guide catheter was guided to the common carotid artery. A Spider FX was placed proximal to the bifurcation of the ICA and the PPHA. A 10 mm × 20 mm CASPER stent was deployed at the site of the stricture with no postoperative ischemic complications. Results There was no intra-stent occlusion, stenosis, or plaque protrusion immediately after surgery, and no postoperative ischemic complications were observed. Conclusion CASPER stent deployment with the Spider FX in the ICA and PPHA bifurcation can be considered to be an effective treatment method for ICA stenosis associated with PPHA. However, care should be taken in selecting the appropriate EPDs and stents depending on the location of the stenosis and bifurcation of the PPHA.
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Affiliation(s)
- Shinichiro Yoshida
- Department of Neurosurgery, Fukuoka Neurosurgical Hospital, Fukuoka, Japan
| | - Kaisei Kamatani
- Department of Neurosurgery, Fukuoka Neurosurgical Hospital, Fukuoka, Japan
| | - Kousuke Takigawa
- Department of Neurosurgery, Fukuoka Neurosurgical Hospital, Fukuoka, Japan
| | - Noriaki Tashiro
- Department of Cerebrovascular Medicine, Fukuoka Neurosurgical Hospital, Fukuoka, Japan
| | - Yoshiya Hashiguchi
- Department of Cerebrovascular Medicine, Fukuoka Neurosurgical Hospital, Fukuoka, Japan
| | - Masahiro Yasaka
- Department of Cerebrovascular Medicine, Fukuoka Neurosurgical Hospital, Fukuoka, Japan
| | - Hiroshi Aikawa
- Department of Neurosurgery, Fukuoka Neurosurgical Hospital, Fukuoka, Japan
| | - Yoshinori Go
- Department of Neurosurgery, Fukuoka Neurosurgical Hospital, Fukuoka, Japan
| | - Kiyoshi Kazekawa
- Department of Neurosurgery, Fukuoka Neurosurgical Hospital, Fukuoka, Japan
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Yoshida S, Kamatani K, Maruyama K, Hama Y, Tashiro N, Hiraoka F, Yano S, Aikawa H, Go Y, Kazekawa K. Treatment strategy for giant thrombosed aneurysm of the basilar artery with associated obstructive hydrocephalus. Surg Neurol Int 2023; 14:23. [PMID: 36751451 PMCID: PMC9899459 DOI: 10.25259/sni_961_2022] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2022] [Accepted: 01/06/2023] [Indexed: 01/22/2023] Open
Abstract
Background There is no established adequate treatment for thrombosed aneurysm of the basilar artery with obstructive hydrocephalus. We conducted coil embolization and peritoneal shunting followed by placement of a stent expected to exert flow diversion (FD) effects to treat 2 patients with giant thrombosed aneurysms of the basilar artery with associated obstructive hydrocephalus, with good results. Methods From April 2019 to March 2021, consecutive two cases of symptomatic hydrocephalus due to giant thrombosed aneurysms in the posterior cranial fossa at our hospital were treated. At first, coil embolization was performed to prevent aneurysm rupture. After coil embolization, ventriculoperitoneal shunting was performed. Finally, stent-assisted coil embolization was performed with flow re-direction endoluminal device (FRED) or low-profile visualized intraluminal support device (LVIS) stent. Results Both patients were discharged after recovering well, with no postoperative hemorrhagic or ischemic complications. Conclusion Staged surgery using a FRED for flow diverter or an LVIS stent expected to have FD effects may offer an effective treatment option.
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Affiliation(s)
- Shinichiro Yoshida
- Corresponding author: Shinichiro Yoshida, Department of Neurosurgery, Fukuoka Neurosurgical Hospital, Fukuoka, Japan.
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Kuwajima T, Kazekawa K, Maruyama K, Yoshida S, Hama Y, Morita H, Ota Y, Tashiro N, Hiraoka F, Kawano H, Yano S, Aikawa H, Go Y, Yoshimura S. Usefulness and Problems of Y-Stent and T-Stent Assisted Coiling for Unruptured Cerebral Aneurysms. J Stroke Cerebrovasc Dis 2022; 31:106668. [PMID: 35986945 DOI: 10.1016/j.jstrokecerebrovasdis.2022.106668] [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: 01/18/2022] [Revised: 06/29/2022] [Accepted: 07/17/2022] [Indexed: 10/15/2022] Open
Abstract
INTRODUCTION We are going to discuss about usefulness and problems of Y-stent and T-stent assisted coiling for unruptured cerebral aneurysms. METHODS A retrospective review was performed to identify patients who were treated using Y-stent or T-stent assisted coiling (Y-SAC, T-SAC) for 25 unruptured cerebral aneurysms from April 2017 to September 2021. Fifteen cases were treated using Y-SAC, 10 were done using T-SAC. Only a case was treated with Low-profile Visualized Intraluminal Support (LVIS; MicroVention TRUMO, Aliso Viejo, California, USA) and Neuroform ATLAS (Striker, Kalamazoo, Michigan, USA), Others were done with two Neuroform ATLAS stents. RESULTS Y-SAC and T-SAC were succeeded in all cases. In two cases that were treated using Y-SAC, ischemic complications were observed. A patient received additional embolization because subarachnoid hemorrhage (SAH) was appeared after discharge. On follow-up imaging, CO (complete occlusion) was confirmed in all cases. CONCLUSION The position of deployment of stents was the most important issue. In particular, the second stent should be deployed as to contact the first stent, as possible. The case that the position of the second stent was shifted, and neck was not covered was observed. In the cases that are treated by using T-SAC, microcatheter must be navigated to distal position as possible. In that point, Y-SAC is more applicable. The familiarization of Y-SAC or T-SAC will expand the indication of endovascular treatment for unruptured cerebral aneurysms.
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Affiliation(s)
- Takuto Kuwajima
- Department of Neurosurgery, Fukuoka Neurosurgical Hospital, Fukuoka Minami-ku, Fukuoka, Japan; Department of Neurosurgery, Saiseikai Noe Hospital, Osaka Joto-ku, Osaka, Japan; Department of Neurosurgery, Hyogo College of Medicine, Nishinomiya, Hyogo, Japan.
| | - Kiyoshi Kazekawa
- Department of Neurosurgery, Fukuoka Neurosurgical Hospital, Fukuoka Minami-ku, Fukuoka, Japan
| | - Kosei Maruyama
- Department of Neurosurgery, Fukuoka Neurosurgical Hospital, Fukuoka Minami-ku, Fukuoka, Japan
| | - Shinichiro Yoshida
- Department of Neurosurgery, Fukuoka Neurosurgical Hospital, Fukuoka Minami-ku, Fukuoka, Japan; Department of Neurosurgery, Hyogo College of Medicine, Nishinomiya, Hyogo, Japan
| | - Yoshiaki Hama
- Department of Neurosurgery, Fukuoka Neurosurgical Hospital, Fukuoka Minami-ku, Fukuoka, Japan
| | - Hiroya Morita
- Department of Neurosurgery, Fukuoka Neurosurgical Hospital, Fukuoka Minami-ku, Fukuoka, Japan
| | - Yuichiro Ota
- Department of Neurosurgery, Fukuoka Neurosurgical Hospital, Fukuoka Minami-ku, Fukuoka, Japan
| | - Noriaki Tashiro
- Department of Neurosurgery, Fukuoka Neurosurgical Hospital, Fukuoka Minami-ku, Fukuoka, Japan
| | - Fumihiro Hiraoka
- Department of Neurosurgery, Fukuoka Neurosurgical Hospital, Fukuoka Minami-ku, Fukuoka, Japan
| | - Hiroto Kawano
- Department of Neurosurgery, Fukuoka Neurosurgical Hospital, Fukuoka Minami-ku, Fukuoka, Japan
| | - Shigetoshi Yano
- Department of Neurosurgery, Fukuoka Neurosurgical Hospital, Fukuoka Minami-ku, Fukuoka, Japan
| | - Hiroshi Aikawa
- Department of Neurosurgery, Fukuoka Neurosurgical Hospital, Fukuoka Minami-ku, Fukuoka, Japan
| | - Yoshinori Go
- Department of Neurosurgery, Fukuoka Neurosurgical Hospital, Fukuoka Minami-ku, Fukuoka, Japan
| | - Shinichi Yoshimura
- Department of Neurosurgery, Hyogo College of Medicine, Nishinomiya, Hyogo, Japan
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Yoshida S, Maruyama K, Kuwajima T, Hama Y, Morita H, Ota Y, Tashiro N, Hiraoka F, Kawano H, Yano S, Aikawa H, Go Y, Kazekawa K. Successful use of an LVIS device to treat unruptured distal aneurysm of the superior cerebellar artery at a vascular bifurcation. Surg Neurol Int 2022; 13:208. [PMID: 35673657 PMCID: PMC9168393 DOI: 10.25259/sni_201_2022] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2022] [Accepted: 03/29/2022] [Indexed: 11/04/2022] Open
Abstract
Background Aneurysms of the distal superior cerebellar artery (SCA) account for only a small proportion of all cerebral aneurysms. Reports of the use of flow diverters (FDs) started to appear in 2013. We obtained good results from placement of a low-profile visualized intraluminal support device (LVIS) to treat unruptured distal aneurysm of the SCA at a vascular bifurcation. Case Description A 65-year-old man presented at our hospital with sudden peripheral facial nerve palsy and suspected subarachnoid hemorrhage. Investigational cerebral angiography revealed an aneurysm at the bifurcation of the caudal and rostral trunks of the SCA. An LVIS was placed with the aim of obtaining flow diversion, and cerebral angiography 6 months after this procedure showed disappearance of aneurysm with preservation of the distal SCA. Conclusion Twelve cases of the use of FDs to treat aneurysms of the SCA have been reported previously. However, none of those reports described FD use to treat an aneurysm at a vascular bifurcation, as in the present case. Our results suggested that LVIS placement with the aim of obtaining flow diversion may be useful for the treatment of aneurysms at such sites.
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Affiliation(s)
- Shinichiro Yoshida
- Department of Neurosurgery, Fukuoka Neurosurgical Hospital, Fukuoka, Japan
| | - Kousei Maruyama
- Department of Neurosurgery, Fukuoka Neurosurgical Hospital, Fukuoka, Japan
| | - Takuto Kuwajima
- Department of Neurosurgery, Fukuoka Neurosurgical Hospital, Fukuoka, Japan
| | - Yoshiaki Hama
- Department of Neurosurgery, Fukuoka Neurosurgical Hospital, Fukuoka, Japan
| | - Hiroya Morita
- Department of Neurosurgery, Fukuoka Neurosurgical Hospital, Fukuoka, Japan
| | - Yuichiro Ota
- Department of Neurosurgery, Fukuoka Neurosurgical Hospital, Fukuoka, Japan
| | - Noriaki Tashiro
- Department of Neurosurgery, Fukuoka Neurosurgical Hospital, Fukuoka, Japan
| | - Fumihiro Hiraoka
- Department of Neurosurgery, Fukuoka Neurosurgical Hospital, Fukuoka, Japan
| | - Hiroto Kawano
- Department of Neurosurgery, Fukuoka Neurosurgical Hospital, Fukuoka, Japan
| | - Shigetoshi Yano
- Department of Neurosurgery, Fukuoka Neurosurgical Hospital, Fukuoka, Japan
| | - Hiroshi Aikawa
- Department of Neurosurgery, Fukuoka Neurosurgical Hospital, Fukuoka, Japan
| | - Yoshinori Go
- Department of Neurosurgery, Go Neurosurgical Clinic, Fukuoka, Japan
| | - Kiyoshi Kazekawa
- Department of Neurosurgery, Fukuoka Neurosurgical Hospital, Fukuoka, Japan
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Yano S, Hiraoka F, Morita H, Kawano H, Kuwajima T, Yoshida SI, Hama Y, Tashiro N, Hamaguchi S, Aikawa H, Go Y, Kazekawa K. Usefulness of endoscope-assisted surgery under exoscopic view in skull base surgery: A technical note. Surg Neurol Int 2022; 13:30. [PMID: 35242396 PMCID: PMC8888302 DOI: 10.25259/sni_965_2021] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2021] [Accepted: 12/29/2021] [Indexed: 11/24/2022] Open
Abstract
Background: The use of the exoscope has been increasing in the field of neurosurgery, as it can set the visual axis freely, enabling the surgeon to operate in a comfortable posture. Although endoscope-assisted surgery for compensation of insufficient surgical field is useful under the microscope, we report that using an endoscope in exoscopic surgery is safer and more useful. Methods: The exoscope used was ORBEYE. All surgical procedures were performed exoscopically from the beginning of the surgery. When endoscopic observation was required during the operation, the endoscope was inserted under observation by an exoscope. The exoscopic screen was 4K-3D and endoscopic screen was 4K-2D, the operation was performed while observing both screens at the same time. The endoscope was held manually or by a mechanical holder. Results: Twenty-two cases, including 14 requiring microvascular decompression (MVD) and eight requiring tumor removal, were performed by endoscopic-assisted exoscopic surgery. The endoscope could be inserted safely because its relationship with the surrounding structure could be observed under the exoscope, and the operator could observe both screens without moving the head. Fourteen of 22 patients required additional endoscopic treatment. Satisfactory two-handed operation was performed in 13 cases. Symptomatology disappeared in all cases of MVD, and sufficient tumor resection was achieved. Conclusion: Exoscopic surgery provides excellent surgical view that is not inferior to conventional microsurgery. As a large space can be secured between the scope and the surgical field, it is safer and easier to manipulate the endoscope under the exoscope.
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Tashiro N, Kawano H, Hiraoka F, Nakamura Y, Fukuda S, Yano S, Aikawa H, Go Y, Kazekawa K, Matsumoto Y. Iatrogenic Middle Meningeal Arteriovenous Fistula During Embolization: Two Case Reports and Literature Review. J Stroke Cerebrovasc Dis 2021; 30:105909. [PMID: 34119750 DOI: 10.1016/j.jstrokecerebrovasdis.2021.105909] [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: 02/07/2021] [Revised: 05/07/2021] [Accepted: 05/19/2021] [Indexed: 11/30/2022] Open
Abstract
Objective Dural arteriovenous fistulae of the middle meningeal artery are rare. There are few reports of complications associated with endovascular therapy. This report describes two cases of iatrogenic middle meningeal arteriovenous fistula due to vascular injury sustained during endovascular treatment. Case description Case 1 was that of a 46-year-old woman. She was treated for an incidentally discovered dural arteriovenous fistula of the cerebellar tentorium by transarterial embolization. During the procedure, a middle meningeal arteriovenous fistula occurred because of vessel laceration by the forced advancement of the distal access catheter (DAC). After the intervention, she developed tinnitus. Follow-up angiography revealed a middle meningeal arteriovenous fistula. The fistula was treated by coil embolization of the affected middle meningeal artery. The second case was that of a 56-year-old woman who developed a middle meningeal arteriovenous fistula from the perforation caused by the microguidewire during tumor embolization. The fistula was treated by occluding the proximal segment of the affected artery with coils. Both patients were discharged without neurological complications after the endovascular procedures. Conclusion Endovascular surgeons should be aware of the possibility of middle meningeal arteriovenous fistula as a potential complication of endovascular procedures.
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Affiliation(s)
- Noriaki Tashiro
- Department of Neurology, Fukuoka Neurosurgical Hospital, 5-3-15 Osa Minami, Fukuoka, Fukuoka 811-1313, Japan
| | - Hiroto Kawano
- Department of Neurosurgery, Fukuoka Neurosurgical Hospital, 5-3-15 Osa Minami, Fukuoka, Fukuoka 811-1313, Japan
| | - Fumihiro Hiraoka
- Department of Neurosurgery, Fukuoka Neurosurgical Hospital, 5-3-15 Osa Minami, Fukuoka, Fukuoka 811-1313, Japan
| | - Yusuke Nakamura
- Department of Neurosurgery, Fukuoka Neurosurgical Hospital, 5-3-15 Osa Minami, Fukuoka, Fukuoka 811-1313, Japan
| | - Shuji Fukuda
- Department of Neurosurgery, Fukuoka Neurosurgical Hospital, 5-3-15 Osa Minami, Fukuoka, Fukuoka 811-1313, Japan
| | - Shigetoshi Yano
- Department of Neurosurgery, Fukuoka Neurosurgical Hospital, 5-3-15 Osa Minami, Fukuoka, Fukuoka 811-1313, Japan
| | - Hiroshi Aikawa
- Department of Neurosurgery, Fukuoka Neurosurgical Hospital, 5-3-15 Osa Minami, Fukuoka, Fukuoka 811-1313, Japan
| | - Yoshinori Go
- Department of Neurosurgery, Go Neurosurgical Clinic, 1150-1 Yamada Nakagawa, Chikushi, Fukuoka 811-1244, Japan
| | - Kiyoshi Kazekawa
- Department of Neurosurgery, Fukuoka Neurosurgical Hospital, 5-3-15 Osa Minami, Fukuoka, Fukuoka 811-1313, Japan
| | - Yoshihisa Matsumoto
- Department of Neurosurgery, St. Mary's Hospital, 422 Tsubukuhonnmachi, Kurume, Fukuoka 8308543, Japan.
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Tashiro N, Kawano H, Hiraoka F, Fukuda S, Nakamura Y, Yano S, Aikawa H, Go Y, Kazekawa K, Matsumoto Y, Yoshimura S. Distal Embolic Protection by Manual Compression of the Vertebral Artery in Subclavian Artery Stenting. J Neuroendovasc Ther 2020; 15:254-259. [PMID: 37501690 PMCID: PMC10370922 DOI: 10.5797/jnet.tn.2020-0013] [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] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/30/2020] [Accepted: 08/12/2020] [Indexed: 07/29/2023]
Abstract
Objective There is no established method for preventing vertebral artery embolization in percutaneous transluminal angioplasty (PTA) for subclavian artery stenosis. We manually compressed the supraclavicular fossa outside the sternocleidomastoid muscle to disrupt vertebral artery blood flow and prevent embolism. We report the usefulness of this procedure. Case Presentations Between April 2017 and July 2018, three patients with severe stenosis of the subclavian artery of 80% or higher were examined. For these patients, subclavian artery stenting was performed. The approach was via the left brachial artery in one patient and right femoral artery in two patients. After crossing the lesion, the vertebral artery was manually compressed and angiography confirmed that blood flow was blocked. In all patients, stent placement was successfully performed and good dilatation was confirmed by angiography. There were no neurological complications and no findings suggestive of acute cerebral infarction were found on magnetic resonance imaging (MRI). Conclusion Prevention of distal embolism by manual compression is simple, does not require multiple catheters, and is useful for subclavian artery stenting.
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Affiliation(s)
- Noriaki Tashiro
- Department of Neurology, Fukuoka Neurosurgical Hospital, Fukuoka, Fukuoka, Japan
| | - Hiroto Kawano
- Department of Neurosurgery, Fukuoka Neurosurgical Hospital, Fukuoka, Fukuoka, Japan
| | - Fumihiro Hiraoka
- Department of Neurosurgery, Fukuoka Neurosurgical Hospital, Fukuoka, Fukuoka, Japan
| | - Shuji Fukuda
- Department of Neurosurgery, Fukuoka Neurosurgical Hospital, Fukuoka, Fukuoka, Japan
| | - Yusuke Nakamura
- Department of Neurosurgery, Fukuoka Neurosurgical Hospital, Fukuoka, Fukuoka, Japan
| | - Shigetoshi Yano
- Department of Neurosurgery, Fukuoka Neurosurgical Hospital, Fukuoka, Fukuoka, Japan
| | - Hiroshi Aikawa
- Department of Neurosurgery, Fukuoka Neurosurgical Hospital, Fukuoka, Fukuoka, Japan
| | - Yoshinori Go
- Go Neurosurgical Clinic, Chikushi-gun, Fukuoka, Japan
| | - Kiyoshi Kazekawa
- Department of Neurosurgery, Fukuoka Neurosurgical Hospital, Fukuoka, Fukuoka, Japan
| | | | - Shinichi Yoshimura
- Department of Neurosurgery, The Hospital of Hyogo College of Medicine, Nishinomiya, Hyogo, Japan
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Kanai K, Yamamoto N, Nogami N, Atagi S, Saka H, Tashiro N, Seto T. 141PD A prospective study of molecular testing status in the EGFR mutation positive NSCLC patients with disease progression during EGFR TKI treatment (REMEDY study). J Thorac Oncol 2018. [DOI: 10.1016/s1556-0864(18)30415-5] [Citation(s) in RCA: 1] [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: 11/25/2022]
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Harada T, Yoshida Y, Kitasato Y, Tsuruta N, Wakamatsu K, Hirota T, Tanaka M, Tashiro N, Ishii H, Shiraishi M, Fujita M, Nagata N, Watanabe K. The thoracic cage becomes flattened in the progression of pleuroparenchymal fibroelastosis. Eur Respir Rev 2014; 23:263-6. [PMID: 24881083 PMCID: PMC9487577 DOI: 10.1183/09059180.00006713] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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Matsumoto T, Fujita M, Hirano R, Tashiro N, Asai Y, Fukuyama S, Morimoto Y, Nakanishi Y, Watanabe K. P11 The role of chronic infection by Pseudomonas aeruginosa in the COPD pathogenesis in CCSP-deficient mice. Int J Antimicrob Agents 2013. [DOI: 10.1016/s0924-8579(13)70256-5] [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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14
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Ieiri I, Yamada S, Seto K, Morita T, Kaneda T, Mamiya K, Tashiro N, Higuchi S, Otsubo K. A CYP2D6 Phenotype-Genotype Mismatch in Japanese Psychiatric Patients. Pharmacopsychiatry 2004; 36:192-6. [PMID: 14571354 DOI: 10.1055/s-2003-43049] [Citation(s) in RCA: 13] [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] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
The aim of the present study was to seek a CYP2D6 genotypic-phenotypic discordance possibility in Japanese patients under psychotropic drug treatment where the CYP2D6 status and pharmacodynamic responses differ from those in Caucasian psychiatric patients. Ninety drug-free, healthy volunteers and 14 patients undergoing psychotropic drug treatment were phenotyped for their individual CYP2D6 activity using dextromethorphan as a probe, and then the metabolic ratio (MR) was calculated. For the genotyping, eight mutant alleles of the CYP2D6 genes were identified. Serum concentrations of two frequently co-medicated psychotropic drugs, biperiden and levomepromazine, were determined by GC/MS. Genotyping revealed no poor metabolizers (PMs) enrolled in our study. Healthy volunteers exhibited an identical phenotype-genotype concordance, whereas 7 of the 14 patients had significantly high (p < 0.05) MRs compared with genotype-matched volunteers. Three of the patients who had the extensive metabolizer (EM) genotype had extremely high MRs and were classified as phenotypic PMs. Five patients plus all of the seven high MR patients were treated with levomepromazine and/or biperiden, respectively. Their mean serum steady-state concentrations were 27.4 and 7.6 ng/ml, respectively. A CYP2D6 phenotype-genotype mismatch (phenocopying) can occur in Japanese psychiatric patients receiving clinical doses of some psychotropic drugs where the prevalence of PMs is low and the pharmacodynamic responses to those drugs are enhanced compared to Caucasian patients.
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Affiliation(s)
- I Ieiri
- Department of Hospital Pharmacy, Faculty of Medicine, Tottori University, Yonago, Japan.
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15
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Tokumasu K, Tashiro N, Ikegami A, Yoneda S, Iho K. Abnormal eye movement and nystagmus in the case of cerebellar lesion. Adv Otorhinolaryngol 2002; 30:210-3. [PMID: 12325187 DOI: 10.1159/000407641] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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16
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Kaname H, Mori Y, Sumida Y, Kojima K, Kubo C, Tashiro N. Changes in the leukocyte distribution and surface expression of adhesion molecules induced by hypothalamic stimulation in the cat. Brain Behav Immun 2002; 16:351-67. [PMID: 12096883 DOI: 10.1006/brbi.2001.0635] [Citation(s) in RCA: 16] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Emotions and the neuroendocrine system are known to affect leukocyte distribution. However, there have so far been few reports on the relationship between hypothalamically induced emotional behavior and the endocrine-immune response. We previously reported changes in the leukocyte distribution and adhesion molecules induced by anteromedial hypothalamus stimulation (AH stimulation), which elicits restlessness behaviors in the cat. In this study, we examined ventromedial hypothalamus stimulation (VMH stimulation), which elicits threat behaviors. In addition, the endocrine responses after VMH stimulation were evaluated. VMH stimulation as well as AH stimulation induced elevations of plasma cortisol and epinephrine levels and granulocytosis and lymphopenia. In contrast, VMH stimulation induced only an elevation of plasma norepinephrine and elicited an opposite pattern of CD62L expression on the leukocyte subpopulations. The different endocrine-immunological reactions between VMH stimulation and AH stimulation were thus associated with different types of behavioral responses.
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Affiliation(s)
- H Kaname
- Department of Neuropsychiatry, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan.
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17
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Koga H, Yuzuriha T, Yao H, Endo K, Hiejima S, Takashima Y, Sadanaga F, Matsumoto T, Uchino A, Ogomori K, Ichimiya A, Uchimura H, Tashiro N. Quantitative MRI findings and cognitive impairment among community dwelling elderly subjects. J Neurol Neurosurg Psychiatry 2002; 72:737-41. [PMID: 12023416 PMCID: PMC1737917 DOI: 10.1136/jnnp.72.6.737] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.0] [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: 11/04/2022]
Abstract
OBJECTIVES To study the factors which influence cognitive impairment among elderly subjects living in a local community, based on both MRI and clinical findings, to further elucidate the causes of dementia, and also to help develop strategies for its prevention. METHODS Cranial MRI and other medical examinations were performed on non-demented elderly subjects who resided in one rural community. A total of 254 subjects aged from 60 to 91 years of age, with a mean age of 73.9 (SD 6.8) were examined. The mini mental state examination (MMSE) was used to identify cognitive impairment. White matter lesions and cerebral atrophy on MR images were measured quantitatively. A multivariate analysis was also performed with the existence of cognitive impairment as the dependent variable, and the MRI findings and clinical observations were used as the independent variables. RESULTS Cognitive impairment was present in 46 subjects (18.1%). They were older, had a lower educational level, and more frequent hypertension compared with those without cognitive impairment. The packed cell volume was lower in the impaired group. In addition, their MRI findings showed significantly larger quantities of white matter lesions and cerebral atrophy, as well as more infarcts. A logistic regression analysis demonstrated a significant relation among such factors as white matter lesions (odds ratio (OR) 1.575, 95% confidence interval (95% CI) 1.123-2.208), cerebral atrophy (OR 0.761, 95%CI 0.587-0.987), and lower education (OR 0.682, 95%CI 0.544-0.855) for subjects with a cognitive impairment. CONCLUSIONS White matter lesions and cerebral atrophy are factors which induce a cognitive impairment in community dwelling elderly subjects without dementia. It is important to carefully watch for any abnormalities in these factors, and to perform cohort studies to check for the above risk factors, to both prevent and make an early diagnosis of dementia.
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Affiliation(s)
- H Koga
- Department of Neuropsychiatry, Faculty of Medicine, Kyushu University Hospital, Maidashi, Fukuoka 812-8582, Japan.
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18
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Hasegawa S, Tashiro N, Matsubara T, Furukawa S, Ra C. A comparison of FcepsilonRI-mediated RANTES release from human platelets between allergic patients and healthy individuals. Int Arch Allergy Immunol 2002; 125 Suppl 1:42-7. [PMID: 11408772 DOI: 10.1159/000053852] [Citation(s) in RCA: 49] [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: 11/19/2022] Open
Abstract
BACKGROUND Recently some studies have suggested that human platelets may play an important role in allergic inflammation through the high affinity IgE receptor (FcepsilonRI), the low affinity IgE receptor (FcepsilonRII/CD23) and the low affinity IgG receptor (FcgammaRIIA/CD32) expressed on the cell surface. We reported that human platelets via the FcepsilonRI induced the release of the chemical mediator serotonin and the chemokine RANTES (regulated upon activation, normal T expressed and presumably secreted), but the biological implication of human platelets in type I allergy has not yet been understood clearly. METHODS We compared the levels of RANTES release from platelets obtained from allergic patients and healthy individuals, stimulated with monoclonal antibody (Ab) to human FcepsilonRI alpha-chain, or human myeloma IgE and anti-human IgE Ab. RESULTS We confirmed that the level of RANTES release from platelets of allergic patients stimulated with human IgE and anti-human IgE was significantly higher than that of healthy individuals. CONCLUSIONS We demonstrated that the surface expression levels of FcepsilonRI on the platelets from allergic patients and healthy individuals were not significantly different, but that the platelets of allergic patients were more activated by the IgE-FcepsilonRI pathway than those of healthy individuals. Taken together, these results suggest a novel and important role for human platelets in perpetuating allergic inflammation through the IgE and FcepsilonRI.
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Affiliation(s)
- S Hasegawa
- Department of Pediatrics, Yamaguchi University School of Medicine, Yamaguchi, Japan
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19
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Kuroki T, Tashiro N. [Clinical and pharmacological studies of the second generation antipsychotics]. Fukuoka Igaku Zasshi 2001; 92:365-9. [PMID: 11813688] [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: 04/17/2023]
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20
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Mohamed S, Kojima K, Fujimaru Y, Mori Y, Kaname H, Sumida Y, Kinukawa N, Tashiro N. Effects of hypothalamically elicited emotional behaviors on the plasma levels of estradiol and IGF-1. Physiol Behav 2001; 74:523-32. [PMID: 11790412 DOI: 10.1016/s0031-9384(01)00603-5] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
We examined changes in the plasma levels of estradiol (E2), insulin-like growth factor-1 (IGF-1), ACTH, cortisol and catecholamines accompanying various kinds of hypothalamically elicited emotional behaviors in female cats. The emotional behaviors consisting of restlessness, threat and searching-biting (S-B) were elicited intermittently for 6 h by electrical stimulation of the anterior hypothalamus (AH), ventromedial hypothalamus (VMH) and lateral hypothalamus (LH), respectively, in awake and free-moving conditions. The blood was sampled three times immediately before, 1 h after and 6 h after the start of stimulation. The plasma levels of ACTH, cortisol and catecholamines significantly increased in both restlessness and threat behaviors, whereas in the S-B behavior, the ACTH level significantly increased, while the cortisol level showed a slight nonsignificant increase. No changes were observed in the plasma catecholamine levels in the S-B behavior. The plasma E2 level significantly increased in threat behavior after 1 and 6 h of stimulation compared to the prestimulation levels, and the level also increased in comparison to the control group after 1 h. In contrast, the restlessness and S-B behaviors had little or no effect on the E2 level. No significant changes were observed in the plasma levels of IGF-1 in all behavior groups. These findings suggest that various hypothalamically elicited emotional behaviors have differential effects on the plasma E2, but not on the IGF-1 levels. Therefore, E2 and IGF-1 are regulated independently of each other.
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Affiliation(s)
- S Mohamed
- Department of Neuropsychiatry, Graduate School of Medical Sciences, Kyushu University, 3-1-1, Fukuoka 812-8582, Maidashi Higashi, Japan.
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21
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Toki S, Kawasaki H, Tashiro N, Housman DE, Graybiel AM. Guanine nucleotide exchange factors CalDAG-GEFI and CalDAG-GEFII are colocalized in striatal projection neurons. J Comp Neurol 2001; 437:398-407. [PMID: 11503142 DOI: 10.1002/cne.1291] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
CalDAG-GEFI and CalDAG-GEFII (identical to RasGRP) are novel, brain-enriched guanine nucleotide exchange factors (GEFs) that can be stimulated by calcium and diacylglycerol and that can activate small GTPases, including Ras and Rap1, molecules increasingly recognized as having signaling functions in neurons. Here, we show that CalDAG-GEFI and CalDAG-GEFII mRNAs, detected by in situ hybridization analysis, have sharply contrasting forebrain-predominant distributions in the mature brain: CalDAG-GEFI is expressed mainly in the striatum and olfactory structures and deep cortical layers, whereas CalDAG-GEFII is expressed widely in the forebrain. Within the striatum, however, the two CalDAG-GEF mRNAs have nearly identical distributions: they are coexpressed in striatal projection neurons that give rise to the direct and indirect pathways of the basal ganglia. Subcellular fractionation analysis of the substantia nigra with monoclonal antibodies against CalDAG-GEFI suggests that CalDAG-GEFI protein is present not only in the cell bodies of striatal projection neurons but also in their axons and axon terminals. These results suggest that the CalDAG-GEFs may be key intracellular regulators whereby calcium and diacylglycerol signals can regulate cellular functions through small GTPases in the basal ganglia circuits.
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Affiliation(s)
- S Toki
- Pharmaceutical Research Institute, Kyowa Hakko Kogyo Company, Ltd., Shizuoka 411-8731, Japan
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22
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Shibata H, Joo A, Fujii Y, Tani A, Makino C, Hirata N, Kikuta R, Ninomiya H, Tashiro N, Fukumaki Y. Association study of polymorphisms in the GluR5 kainate receptor gene (GRIK1) with schizophrenia. Psychiatr Genet 2001; 11:139-44. [PMID: 11702055 DOI: 10.1097/00041444-200109000-00005] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.4] [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
The glutamatergic dysfunction hypothesis suggests genes involved in glutamatergic transmission as candidates for schizophrenia susceptibility genes. We screened single nucleotide polymorphisms (SNPs) in the entire coding sequence of the GluR5 kainate receptor gene, GRIK1, by polymerase chain reaction-single strand conformation polymorphism and direct sequencing. We identified six SNPs including three known ones, 522A/C (174T, synonymous), 1173C/T (391D, synonymous), and 2705C/T (902L/S), as well as three novel ones, 995C/T (332A/V), 2400C/T (800L, synonymous), and 2585A/G (862R/Q). We genotyped Japanese samples of schizophrenia (n = 193-203) and healthy controls (n = 199-215) for three SNPs those were commonly observed in our samples, 522A/C, 1173C/T, and 2705C/T. We observed no significant associations of the SNPs and their haplotypes with schizophrenia. Therefore, we conclude that GRIK1 does not play a major role in schizophrenia pathogenesis in the Japanese population.
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Affiliation(s)
- H Shibata
- Research Centre for Genetic Information, Medical Institute of Bioregulation, Kyushu University, Fukuoka, Japan
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23
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Abstract
Numerous animal studies on the correlation between stress and immunity have been performed but few such studies have been made concerning the relationship between various kinds of stress-related emotional behavior and immunological changes. Electrical stimulation of the hypothalamus in cats elicits various emotional behaviors such as restlessness, defensive attack, defensive retreat and quiet biting attack. We examined changes in the lymphocyte proliferative responses and plasma cortisol level which accompanied such emotional behavior. A significant increase in plasma cortisol was observed in the restlessness, defensive attack and defensive retreat groups, but not in the quiet biting attack or non-response (control) groups. A significant increase in the lymphocyte proliferative responses to phytohemagglutinin (PHA) was observed in the restlessness and defensive attack groups but not in the defensive retreat, quiet biting attack or non-response groups. These results suggest that various kinds of emotional behavior appear to be differentially correlated with the lymphocyte proliferative responses, while also being differentially correlated with the plasma cortisol concentration. Because the changes in lymphocyte responses and plasma cortisol did not always completely correlate with one another, the changes in the lymphocyte responses are not considered to be influenced by plasma cortisol alone.
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Affiliation(s)
- Y Mori
- Department of Neuropsychiatry, Faculty of Medicine, Kyushu University 60, 3-1-1 Maidashi, Higashi-ku, Fukuoka City 812-8582, Japan.
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24
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Shintani M, Ieiri I, Inoue K, Mamiya K, Ninomiya H, Tashiro N, Higuchi S, Otsubo K. Genetic polymorphisms and functional characterization of the 5'-flanking region of the human CYP2C9 gene: in vitro and in vivo studies. Clin Pharmacol Ther 2001; 70:175-82. [PMID: 11503012 DOI: 10.1067/mcp.2001.117367] [Citation(s) in RCA: 64] [Impact Index Per Article: 2.8] [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: 11/22/2022]
Abstract
OBJECTIVE Genetic polymorphisms were identified in the 5'-flanking region of the human CYP2C9 gene, and their effects on the phenotype were evaluated on the basis of the luciferase reporter gene assay and the in vivo pharmacokinetics of phenytoin. METHODS Genetic polymorphisms were screened by polymerase chain reaction-single-strand conformational polymorphism analysis, following sequencing with DNA samples obtained from 50 healthy volunteers and 133 adult epileptic patients. HepG2 hepatoma cells were cotransfected with various sequence patterns of 5'-flanking region-luciferase reporter gene constructs. Pharmacokinetic parameters of phenytoin in relation to the corresponding sequence patterns were estimated by the Bayesian method, and the results were compared with in vitro activities. RESULTS Genetic analysis revealed the existence of 7 single nucleotide polymorphisms (SNPs). Allele frequencies of T-->C transition at position -1912 (T-1912C), C-1886G, C-1566T, G-1538A, C-1189T, G-982A, and A-162G were 0.019, 0.019, 0.077, 0.019, 0.579, 0.019, and 0.003, respectively. Some mutations occurred simultaneously, and a total of 6 sequence patterns (patterns 1-6) were observed. The luciferase reporter gene assay indicated that the presence of mutation(s) resulted in a reduction in luciferase activity of 41.4% (pattern 2) to 86.8% (pattern 5) compared with the activity of the wild-type construct. The calculated intrinsic clearance of phenytoin was also lower (up to a 40% reduction for pattern 2) when a mutation(s) was present. CONCLUSION In addition to the two major mutations in the coding region (CYP2C9*2 and CYP2C9*3 ), mutations in the 5'-flanking region of the human CYP2C9 gene appear to contribute to the large interindividual variability in drug metabolism activity.
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Affiliation(s)
- M Shintani
- Department of Clinical Pharmacokinetics, Division of Pharmaceutical Sciences, Graduate School, Kyushu University, Japan
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25
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Monji A, Utsumi H, Ueda T, Imoto T, Yoshida I, Hashioka S, Tashiro K, Tashiro N. The relationship between the aggregational state of the amyloid-beta peptides and free radical generation by the peptides. J Neurochem 2001; 77:1425-32. [PMID: 11413227 DOI: 10.1046/j.1471-4159.2001.00392.x] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.8] [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: 01/10/2023]
Abstract
In the present study, we investigated whether or not the amyloid-beta protein (Abeta) peptide itself spontaneously generates free radicals using electron spin resonance (ESR) spectroscopy while also monitoring the aggregational state of Abeta and Abeta-induced cytotoxicity. The present results demonstrated a four-line spectrum in the presence of both Abeta40 and Abeta42 with Ntert-butyl-alpha-phenylnitrone (PBN), but not in the presence of PBN alone in phosphate-buffered saline (PBS). The fact that the four-line spectrum obtained for the Abeta/PBN in PBS was completely abolished in the presence of the iron-chelating agent Desferal demonstrated the observed four-line spectrum to be iron-dependent. The present study also revealed that either Abeta40 or Abeta42 with PBN in phosphate buffer (PB) did not produce any definite four-line spectrum. Both a thioflavine-T (Th-T) fluorometric assay and circular dichroism (CD) spectroscopy showed the amyloid fibril formation of Abeta in PBS to be much higher than that of Abeta in PB. Moreover, Abeta-induced cytotoxicity assays showed Abeta incubated in PBS to be more cytotoxic than that incubated in PB. These results thus suggest that Abeta-associated free radical generation is strongly influenced by the aggregational state of the peptides.
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Affiliation(s)
- A Monji
- Department of Neuropsychiatry, Graduate School of Medical Sciences, Graduate School of Pharmaceutical Sciences, Kyushu University, Fukuoka, Japan.
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26
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Monji A, Utsumi H, Yoshida I, Hashioka S, Tashiro K, Tashiro N. The relationship between Abeta-associated free radical generation and Abeta fibril formation revealed by negative stain electron microscopy and thioflavine-T fluorometric assay. Neurosci Lett 2001; 304:65-8. [PMID: 11335056 DOI: 10.1016/s0304-3940(01)01756-6] [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: 11/26/2022]
Abstract
In the present study, we investigated whether or not the Abeta peptide itself spontaneously generates free radicals using electron spin resonance (ESR) spectroscopy while also observing the Abeta fibril formation by negative stain electron microscopy. The present results demonstrated a four-line spectrum in the presence of Abeta(1-40) with N-tert-butyl-alpha-phenylnitrone (PBN) but not in the presence of PBN alone in phosphate-buffered saline. Negative stain electron microscopy has shown that Abeta peptides after 96 h of incubation showed more amyloid-like fibrils than those after 72 h of incubation while the four-line spectrum obtained by ESR spectroscopy attained a maximum intensity after 72 h of incubation and thereafter its intensity immediately decreased during the 4-day incubation period. These results were also supported by a thioflavine-T (Th-T) fluorometric assay. In conclusion, the present results suggest that Abeta-associated free radical generation is correlated with Abeta fibril formation while its generation is only observed transiently during the process of Abeta fibril formation.
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Affiliation(s)
- A Monji
- Department of Neuropsychiatry, Graduate School of Medical Sciences, Kyushu University, 812-8582, Fukuoka, Japan.
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Koga M, Fujiwara M, Ariga S, Isumi H, Tashiro N, Matsubara T, Furukawa S. CD8+ T-lymphocytes infiltrate the myocardium in fulminant herpes virus myocarditis. Pediatr Pathol Mol Med 2001; 20:189-95. [PMID: 11486349] [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: 02/21/2023]
Abstract
We report two cases of fulminant viral myocarditis in previously healthy children. They were caused by herpes simplex virus (HSV)-1 (in a boy aged 3 years) and Epstein-Barr virus (EBV) (in a boy aged 12 months). We obtained the diagnosis of HSV-1 myocarditis by immunohistochemistry and the diagnosis of EBV myocarditis by in situ hybridization. Histologic examination of heart tissue from the two boys revealed mononuclear cell infiltration of the myocardium. Immunohistochemical staining identified these cells as CD8+ T-lymphocytes. CD8+ T-lymphocytes induced by herpes virus infections may play an important role in the damage to heart muscle fibers seen in fulminant myocarditis in previously healthy children. To our knowledge, this is the first report of HSV-1 or EBV myocarditis (at least in children) in which viral infection has been demonstrated in the myocardium.
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Affiliation(s)
- M Koga
- Department of Pediatrics, Yamaguchi University School of Medicine, 1-1-1 Minamikogushi, Ube, Yamaguchi 755-8505, Japan.
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Mitsuyasu H, Hirata N, Sakai Y, Shibata H, Takeda Y, Ninomiya H, Kawasaki H, Tashiro N, Fukumaki Y. Association analysis of polymorphisms in the upstream region of the human dopamine D4 receptor gene (DRD4) with schizophrenia and personality traits. J Hum Genet 2001; 46:26-31. [PMID: 11289715 DOI: 10.1007/s100380170120] [Citation(s) in RCA: 67] [Impact Index Per Article: 2.9] [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: 10/27/2022]
Abstract
The human dopamine D4 receptor (DRD4) is of major interest in molccular studies of schizophrenia and personality traits. We examined the association of schizophrenia and polymorphisms in the upstream region of the DRD4 gene (-768G>A in the negative modulator region; -521C>T, -376C >T, and -291C>T in the cell type-specific promoter region; and -616C>G between the two regions) in 208 schizophrenic patients and 210 normal controls. No significant difference in genotype and allele frequencies was observed between the two groups, indicating that these polymorphisms do not make a major contribution to the pathogenesis of schizophrenia. We also studied the association of polymorphisms in the upstream region and a 48-bp repeat polymorphism in exon III of the DRD4 gene with personality traits in 173 Japanese individuals who completed the temperament and character inventory (TCI). The -768G>A polymorphism was significantly associated with reward dependence (P= 0.044), while no significant association was observed between novelty seeking and polymorphisms in the upstream region or the exon III repeat polymorphism of the DRD4 gene.
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Affiliation(s)
- H Mitsuyasu
- Division of Disease Genes, Institute of Genetic Information, Kyushu University, Fukuoka, Japan
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Abstract
BACKGROUND Postnatal depression occurs in 10-15% of Western women. In Japan, there is a traditional support system for perinatal women and there have been few prospective studies on postnatal depression in terms of cross-cultural studies. METHODS First, a cross-cultural study on postnatal depression was performed. Ninety-eight Japanese women living in England and 88 Japanese women living in Japan were recruited and followed up to 3 months postnatally. The Edinburgh Postnatal Depression Scale (EPDS) and Schedule for Affective Disorder and Schizophrenia were used as a self-report questionnaire and psychiatric diagnostic interview. Diagnoses of depression were made by Research Diagnostic Criteria. Second, a study on 'Satogaeri bunben' (a traditional ritual (support system) for perinatal women in Japan; 'Satogaeri' means returning to the original family town or house and 'bunben' means delivery) was undertaken. Seventy-five mothers were asked to answer the questionnaire 6 months postnatally. The questionnaire was devised by the authors about the choice of Satogaeri bunben and the reasons for the decision. RESULTS The incidence of postnatal depression was 12 and 17% in the English and Japanese groups of mothers, respectively. However, subjects from both groups supressed expression of their depressed mood in answering the EPDS. Satogaeri bunben itself did not lower the incidence of postnatal depression. In the study on Satogaeri bunben, 23 of 75 women did not choose Satogaeri bunben; moreover, seven of these women did not have good support from their own mothers. DISCUSSION Having found that postnatal depression is not uncommon in Japanese women, a screening system should be developed, in particular because Japanese women would not naturally express their emotions, and Satogaeri bunben needs to be reconsidered qualitatively.
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Affiliation(s)
- K Yoshida
- Department of Neuropsychiatry, Graduate School of Medical Science, Kyushu University, Fukuoka, Japan.
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Hadama A, Ieiri I, Morita T, Kimura M, Urae A, Irie S, Kaneda T, Mamiya K, Tashiro N, Higuchi S, Otsubo K. P-hydroxylation of phenobarbital: relationship to (S)-mephenytoin hydroxylation (CYP2C19) polymorphism. Ther Drug Monit 2001; 23:115-8. [PMID: 11294510 DOI: 10.1097/00007691-200104000-00004] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.0] [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
The aim of the current study was to compare the pharmacokinetics of phenobarbital (PB) in extensive metabolizers (EMs) and poor metabolizers (PMs) of S-mephenytoin. Ten healthy volunteers (5 EMs and 5 PMs) were given 30 mg PB daily for 14 days. PB and p-hydroxyphenobarbital (p-OHPB) in serum and urine were measured by high-performance liquid chromatography (HPLC). Urinary excretion (12.5% versus 7.7%) and formation clearance (29.8 versus 21.1 mL/h) of p-OHPB, one of the main metabolites of PB, were significantly lower (p < .05) in PMs than in EMs. However, area under the serum concentration-time curve (153.3 in the EMs versus 122.9 microg x h/mL in the PMs), total (210.8 versus 254.9 mL/h) and renal clearance (53.1 versus 66.1 mL/h) of PB were identical between the two groups. To compare the inducibility of CYP2C19, mephenytoin was also given prior to and on the last day of PB treatment. The urinary level of 4'-hydroxymephenytoin was analyzed by a validated gas chromatograpy/mass spectrometry (GC/MS) method. The mephenytoin hydroxylation index did not change in either EMs (1.42 versus 1.42) or PMs (341.4 versus 403.5), showing that CYP2C19 was not induced by treatment with PB. These results indicated that the p-hydroxylation pathway of PB co-segregates with the CYP2C19 metabolic polymorphism. However, the overall disposition kinetics of PB were not different between EMs and PMs, and therefore polymorphic CYP2C19 seems have no major clinical implications.
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Affiliation(s)
- A Hadama
- Departent of Clinical Pharmacokinetics, Graduate School, Kyushu University, Fukuoka, Japan
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Kawano M, Ichimiya A, Ogomori K, Kuwabara Y, Sasaki M, Yoshida T, Tashiro N. Relationship between both IQ and Mini-Mental State Examination and the regional cerebral glucose metabolism in clinically diagnosed Alzheimer's disease: a PET study. Dement Geriatr Cogn Disord 2001; 12:171-6. [PMID: 11173892 DOI: 10.1159/000051253] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
In order to clarify the hypofunction in which brain areas demonstrate a decline in Intelligence Quotient (IQ), we examined correlations between the IQ and Mini-Mental State Examination (MMSE) and regional cerebral metabolic rate of glucose (rCMRglc) measured using positron emission tomography (PET) in 26 patients with clinically diagnosed Alzheimer's disease (AD). The MMSE scores and full-scale IQ (FSIQ) showed significant correlations with the rCMRglc in the temporal and parietal lobes on both sides and in the left frontal lobe, which were significantly reduced in comparison to those in the normal controls. A multiple regression analysis showed only the MMSE score to predict verbal IQ (VIQ), performance IQ (PIQ) and FSIQ. VIQ was also predicted by the rCMRglc in the left parietal lobe, while PIQ was predicted by the age at onset. The results suggested MMSE to be an index of dementia severity reflected by general intelligence as shown by IQ in AD, and a reduction in the VIQ can thus be used as an index of the left parietal dysfunction, which is not expressed by MMSE.
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Affiliation(s)
- M Kawano
- Department of Neuropsychiatry, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
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Joo A, Shibata H, Ninomiya H, Kawasaki H, Tashiro N, Fukumaki Y. Structure and polymorphisms of the human metabotropic glutamate receptor type 2 gene (GRM2): analysis of association with schizophrenia. Mol Psychiatry 2001; 6:186-92. [PMID: 11317221 DOI: 10.1038/sj.mp.4000841] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/14/2000] [Revised: 10/11/2000] [Accepted: 10/16/2000] [Indexed: 11/08/2022]
Abstract
Metabotropic glutamate receptors (mGluRs) belong to the class of GTP-binding protein coupled receptors and consist of eight different subtypes. The subtype 2 metabotropic glutamate receptor (mGluR2) gene (GRM2) is one of the possible candidate genes for schizophrenia. Phencyclidine (PCP)-induced increase in glutamate efflux and schizophrenia-like behavioral abnormalities were reduced by pretreatment of the mGluRII agonist LY354740 in rats and its effects are mediated via mGluR2. To evaluate involvement of the mGluR2 gene in the pathogenesis of schizophrenia, we isolated the human mGluR2 gene and determined the transcription initiation site, the entire nucleotide sequence and the chromosomal localization. The hmGluR2 gene spans 13 kb with six exons, including one non-coding exon. The gene was mapped to chromosome 3 p12-p11 by Radiation Hybrid Panel analysis. We screened polymorphisms in the coding exons of the mGluR2 gene, using the SSCP procedure. The thirteen polymorphisms identified included ten missense, one silent mutation and two one-base substitutions in the 5'-untranslated region. We genotyped 213 Japanese schizophrenics and 220 controls to study the association of polymorphisms in the mGluR2 gene with schizophrenia. As we found no statistically significant differences in allele frequencies of each polymorphism, these polymorphisms apparently do not play a major role in schizophrenia.
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Affiliation(s)
- A Joo
- Division of Disease Genes, Institute of Genetic Information, Kyushu University, Fukuoka, Japan
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Abstract
A patient had phenytoin intoxication after administration of fluvoxamine, a selective serotonin reuptake inhibitor. The serum concentration of phenytoin increased dramatically from 16.6 to 49.1 microg/mL when fluvoxamine was coadministered, although the daily dosage of phenytoin and other drugs had not changed. During phenytoin and fluvoxamine treatment, ataxia, a typical side effect of phenytoin, was observed. The genotypes of CYP2C9 and 2C19, the enzymes responsible for phenytoin metabolism, were homozygous for the wild-type alleles (CYP2C9*1/*1 and 2C19*1/ *1). The interaction may be a result of inhibition of both CYP2C9 and 2C19 by fluvoxamine.
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Affiliation(s)
- K Mamiya
- Hizen National Hospital, Saga, Japan
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Kojima K, Mohamed S, Fujimaru Y, Mori Y, Kaname H, Sumida Y, Kinukawa N, Tashiro N. Effects of both the emotional behavior and feeding conditions on the circulating plasma volume and plasma glucose levels in cats. Auton Neurosci 2000; 86:58-64. [PMID: 11269925 DOI: 10.1016/s1566-0702(00)00236-8] [Citation(s) in RCA: 8] [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: 10/18/2022]
Abstract
Influence of hypothalamically induced emotional behavior on the circulating plasma volume, plasma levels of glucose, epinephrine (E), norepinephrine (NE), dopamine (DA) and cortisol were examined in awake cats under both fasted and fed conditions. Restlessness was evoked intermittently for 6 h by electrical stimulation of the anteromedial hypothalamus (AMH). Blood was sampled immediately before, 1 h after and 6 h after the start of stimulation. Changes in the plasma volume was calculated by changes of hemoglobin (Hb) and hematocrit (Ht). As the control group, another 7 cats with electrodes implanted but unstimulated were identically treated under both fasted and fed conditions. Both E and glucose levels in restlessness group once markedly increased after 1 h and then tended to decrease after 6 h, whereas NE levels in restlessness group increased after 1 h and further increased after 6 h, whether cats were fasted or fed. DA levels increased under the fasted condition of restlessness. The cortisol level markedly increased in both fasted and fed restlessness groups. The plasma volume in control group increased under the fed condition, while in restlessness group it decreased remarkably and tended to decrease more in a fasted state than in a fed state. These results indicated that AMH induced restlessness elicited marked sympatho-adrenal activation, hyperglycemia and hemoconcentration, whether cats were fasted or fed. Relationship among such responses, and the difference in responses between fasted and fed conditions were also discussed in the paper.
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Affiliation(s)
- K Kojima
- Department of Neuropsychiatry, Graduate School of Medical Sciences, Kyushu University, Fukuoka 812-8582, Japan.
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Takeda T, Morimoto N, Kinukawa N, Nagamine R, Shutou T, Tashiro N. Factors affecting depression and anxiety in female Japanese patients with rheumatoid arthritis. Clin Exp Rheumatol 2000; 18:735-8. [PMID: 11138338] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/18/2023]
Abstract
OBJECTIVE In this study, we attempted to identify which background factors were the most important indicators regarding such psychological problems as depression and anxiety in female rheumatoid arthritis (RA) patients. METHODS Among female RA patients aged 20 and older, who visited the outpatient clinic, and who met the Revised Criteria of the American Rheumatism Association for RA (ARA1987), 101 Class I and II patients were selected as subjects for the present study. Specially designed questionnaires and psychological tests were given to those subjects who had given their written consent for such testing, and a stepwise multiple logistic regression analysis was carried out on the 85 patients who returned all written forms. Those factors affecting psychological problems at a significance level of 5% or less were identified. RESULTS It was shown that among sociodemographic factors, "a decrease in the frequency of going out socially after having RA" and "a higher education" worked as significantly associated variables for depression, while "a decrease in the number of friends after having RA" served as a significantly associated variable for trait anxiety. Significantly associated variables for state anxiety included "a decrease in the frequency of going out socially after having RA" and "a willingness to join an RA study group". CONCLUSION The present study demonstrated that factors related to social interactions were significantly associated with depression and anxiety in Class I and II female RA outpatients.
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Affiliation(s)
- T Takeda
- Department of Neuropsychiatry, Faculty of Medicine, Kyushu University, Fukuoka, Japan
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Affiliation(s)
- T Matsubara
- Department of Pediatrics, Yamaguchi University School of Medicine, Japan.
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37
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Abstract
We manipulated stimulus intensity and number of frequency bands in auditory stimuli in order to investigate the nature of P50 in human auditory evoked potentials. Pure-tone and mixed-tone conditions were examined. For each condition, four stimulus intensities were used: 55, 70, 85 and 100 dB sound pressure level (SPL). The P50s were obtained at Cz using a repetitive stimulus paradigm. P50 amplitudes increased as stimulus intensities increased up to 85 dB; with 100 dB stimulation amplitudes decreased. The number of frequency bands in the stimulus did not affect P50 amplitude. Considered in terms of P50 suppression under a conditioning/testing paradigm, the results suggest that the P50 wave reflects activity of the sensory gating mechanism in humans.
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Affiliation(s)
- H Ninomiya
- Department of Neuropsychiatry, Graduate School of Medical Science, Kyushu University, Fukuoka, Japan.
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Ieiri I, Tainaka H, Morita T, Hadama A, Mamiya K, Hayashibara M, Ninomiya H, Ohmori S, Kitada M, Tashiro N, Higuchi S, Otsubo K. Catalytic activity of three variants (Ile, Leu, and Thr) at amino acid residue 359 in human CYP2C9 gene and simultaneous detection using single-strand conformation polymorphism analysis. Ther Drug Monit 2000; 22:237-44. [PMID: 10850388 DOI: 10.1097/00007691-200006000-00001] [Citation(s) in RCA: 59] [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: 11/26/2022]
Abstract
This study evaluated the catalytic activity of three variants (Ile, Leu, and Thr) at codon 359 of CYP2C9 enzymes expressed in a yeast cDNA expression system, and then established single-strand conformation polymorphism (PCR-SSCP) analysis for simultaneous detection as a screening method. Diclofenac was used for the in vitro experiment, and its hydroxy metabolite (4'-hydroxydiclofenac) was measured by HPLC. To discuss the in vivo effect of the Thr359 variant on the pharmacokinetics of phenytoin, a case report is presented. The efficiency of the SSCP method was evaluated by analyzing DNA samples from a homozygote for Ile359 and a heterozygote for Leu359 or Thr359. To evaluate the interaction between the P450 level and reductase activity, two batches of the Thr359 variant with a different P450:reductase activity ratio (1:4.0 and 1:1.4) were used. The in vitro study revealed that recombinant Ile359, Leu359, and Thr359 (2 batches) possessed a mean Km of 2.0, 16.5 and (3.8 and 2.9) micromol and Vmax of 12.4, 17.9 and (4.4 and 5.1) nmol/min/nmol P450, respectively. Although the magnitude of the change in catalytic efficiency for the Thr359 variant was close to that of the Leu359 variant, the effect of the two variants on diclofenac 4'-hydroxylation appears to be different because Leu359 variant was associated with a high Km, and Thr359 with a low Vmax. No significant differences in the kinetic data were observed between the two Thr359 enzymes, suggesting that low reductase activity in the Thr359 enzyme was not a major determinant in the present in vitro experiment. Estimated pharmacokinetic parameters of phenytoin obtained by the Bayesian method in an epileptic patient who was a heterozygote carrier for Thr359 variant were: Km = 6.45 microg/mL, Vmax = 5.77 mg/kg/d, and Vmax/Km = 0.89 L/kg/day. The Vmax/Km value in this patient was similar to the population mean value (0.90 L/kg/day) in Japanese heterozygotes for the Leu359 variant. Results for PCR-SSCP were in complete agreement with those obtained using established methods. Thus, the PCR-SSCP approach is useful for identifying these three variants of the CYP2C9 gene.
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Affiliation(s)
- I Ieiri
- Department of Hospital Pharmacy, Faculty of Medicine, Tottori University, Yonago, Japan
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Yamashita H, Yoshida K, Nakano H, Tashiro N. Postnatal depression in Japanese women. Detecting the early onset of postnatal depression by closely monitoring the postpartum mood. J Affect Disord 2000; 58:145-54. [PMID: 10781704 DOI: 10.1016/s0165-0327(99)00108-1] [Citation(s) in RCA: 122] [Impact Index Per Article: 5.1] [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: 11/25/2022]
Abstract
OBJECTIVES The terminology and definition of mood disturbance during the early postpartum period has yet to be clearly elucidated among clinical practitioners. Criteria for maternity blues have not been well established, and it may overlap with the beginning of a postnatal depression. The aims of the present study, are firstly to survey the symptomatic features of mood disturbance in the very early postpartum period and secondary, to develop a guideline for detecting and predicting postnatal depression during the same period using a simple screening technique. SUBJECTS AND METHODS Eighty-eight mothers recruited from a maternity ward for the prospective study completed the whole protocol. Two methods were used to survey the symptomatic features of mood disturbance; (1) interview and (2) self-report questionnaires. The interviews were carried out twice. At three weeks postpartum, the Schedule for Affective Disorder and Schizophrenia (SADS)/Research Diagnostic Criteria was administered, together with an interview of the symptoms of "maternity blues". The SADS interview was re-administered at three months postnatally. Two self-report questionnaires addressing mood disturbance were administered: (1) Maternity Blues Scale; (Stein, 1980). (2) Edinburgh Postnatal Depression Scale (EPDS; Cox et al., 1987). The Maternity Blues Scale was administered on the first five consecutive postnatal days. The EPDS was administered on the fifth day, one month and three months postnatally. In addition, the Life Event Scale (Burgha et al., 1985) was also administered at one month postnatally. Obstetric notes were also examined. RESULTS At the first interview, 12 mothers were diagnosed with postnatal depression and 10 of these had their onset within one week. At the second interview three additional mothers were newly diagnosed with depression. In all mothers, depression was detected at one month using the EPDS, with a cut-off of 8/9. The EPDS scores on the fifth postnatal day were also higher in the depressed mothers and could detect early onset of postnatal depression. CONCLUSION The use of the EPDS during the early postnatal days, can be a simple and useful screening instrument for the onset of early postnatal depression.
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Affiliation(s)
- H Yamashita
- Department of Neuropsychiatry, Faculty of Medicine, Kyushu University, Kyushu, Japan
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40
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Ninomiya H, Mamiya K, Matsuo S, Ieiri I, Higuchi S, Tashiro N. Genetic polymorphism of the CYP2C subfamily and excessive serum phenytoin concentration with central nervous system intoxication. Ther Drug Monit 2000; 22:230-2. [PMID: 10774639 DOI: 10.1097/00007691-200004000-00016] [Citation(s) in RCA: 76] [Impact Index Per Article: 3.2] [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: 11/25/2022]
Abstract
The authors report on a Japanese adult male patient with a long history of partial seizures that were poorly controlled by conventional doses of phenytoin and other drugs. His treatment was complicated by toxic symptoms and an excessive serum phenytoin concentration, 32.6 microg/mL at a dose of 187.5 mg/day. Polymerase chain reaction-restriction fragment length polymorphism analysis disclosed heterozygosity involving cytochrome P450 subfamilies 2C9 (*1/*3) and 2C19 (*1/*3). Currently, it is generally accepted that the former mutation is responsible for the CYP2C9 poor metabolizer phenotype. Pharmacokinetic parameters were estimated by a kinetic analysis, MULTI, using 17 observed dose-concentration data sets: a lower Vmax (5.6 mg/kg/day) and a higher Km (11.5 microg/mL) were observed. Although phenytoin is metabolized predominantly by CYP2C9 with a minor contribution of CYP2C19, patients with the Leu359 variant should be monitored closely when treated with a moderate to high daily dose of phenytoin.
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Affiliation(s)
- H Ninomiya
- Department of Neuropsychiatry, Faculty of Medicine, Kyushu University, Fukuoka, Japan
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Mamiya K, Hadama A, Yukawa E, Ieiri I, Otsubo K, Ninomiya H, Tashiro N, Higuchi S. CYP2C19 polymorphism effect on phenobarbitone. Pharmacokinetics in Japanese patients with epilepsy: analysis by population pharmacokinetics. Eur J Clin Pharmacol 2000; 55:821-5. [PMID: 10805060 DOI: 10.1007/s002280050703] [Citation(s) in RCA: 54] [Impact Index Per Article: 2.3] [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: 10/27/2022]
Abstract
OBJECTIVE The aim of this study was to clarify the effect of genetic polymorphisms of CYP2C19 on the pharmacokinetics of phenobarbitone (PB) using a nonlinear mixed-effects model (NONMEM) analysis in Japanese adults with epilepsy. METHODS A total of 144 serum PB concentrations were obtained from 74 subjects treated with both PB and phenytoin but without valproic acid. All patients were classified into three groups by CYP2C19 genotyping: G1, G2 and G3 were homozygous for the wild type of CYP2C19 (*1/*1), heterozygous extensive metabolizers (EMs), (*1/*2 or *1/*3), and poor metabolizers (PMs), (*2/*2, *2/*3), respectively. All data were analyzed using NONMEM to estimate pharmacokinetic parameters of PB with respect to the CYP2C19 genotype. RESULTS Thirty-three patients belonged to G1 (44.6%), 35 to G2 (47.3%), and 6 to G3 (8.1%). The total clearance (CL) of PB significantly decreased by 18.8% in PMs (G3) relative to EMs (G1 and G2). The CL tended to be lower in G2 than in G1. CONCLUSION In this study, we first demonstrated the effect of the CYP2C19 polymorphism on pharmacokinetics of PB by genotyping. The contribution of other metabolic enzymes in the metabolism of PB in humans remains to be elucidated; however, it appears that the disposition of PB is mediated in part by this enzyme. The estimated population clearance values in the three genotype groups can be used to predict the PB dose required to achieve an appropriate serum concentration in an individual patient.
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Affiliation(s)
- K Mamiya
- Department of Clinical Pharmacokinetics, Graduate School of Pharmaceutical Sciences, Kyushu University, Fukuoka, Japan.
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Onitsuka T, Ninomiya H, Sato E, Yamamoto T, Tashiro N. The effect of interstimulus intervals and between-block rests on the auditory evoked potential and magnetic field: is the auditory P50 in humans an overlapping potential? Clin Neurophysiol 2000; 111:237-45. [PMID: 10680558 DOI: 10.1016/s1388-2457(99)00241-2] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.7] [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: 11/15/2022]
Abstract
OBJECTIVE The human auditory P50 may consist of overlapping potentials. To test this hypothesis, we manipulated interstimulus intervals (ISIs) and between-block rests, and recorded the P50, P50m, N100 and the N100m simultaneously. METHODS Subjects were 12 right-handed healthy adults. Four conditions included: (1) 1.5 s/rest, (2) 1.5 s/successive, (3) 0.5 s/rest, and (4) 0.5 s/successive. Auditory stimuli were presented a total of 880 times for each condition. Auditory evoked potentials and magnetic fields were recorded. We examined the P50, N100, P50m, N100m and dipoles of the P50m and the N100m. RESULTS There was no significant effect of the ISI on the P50 amplitudes, but the P50m amplitudes in the 0.5 s ISI conditions were significantly smaller than those in the 1.5 s ISI conditions. The N100 and the N100m amplitudes in the 0.5 s ISI conditions were significantly smaller than those in the 1.5 s ISI conditions. The N100 and the N100m amplitudes in the resting conditions were significantly larger than those in the successive conditions. The P50m dipoles were slightly deeper and more anterior than those of the N100m in primary auditory cortex. CONCLUSIONS Central structures other than supratemporal cortex contribute to the P50 and that the P50 in humans represents overlapping potentials.
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Affiliation(s)
- T Onitsuka
- Department of Neuropsychiatry, Faculty of Medicine, Kyushu University, Fukuoka, Japan
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Imai J, Ieiri I, Mamiya K, Miyahara S, Furuumi H, Nanba E, Yamane M, Fukumaki Y, Ninomiya H, Tashiro N, Otsubo K, Higuchi S. Polymorphism of the cytochrome P450 (CYP) 2C9 gene in Japanese epileptic patients: genetic analysis of the CYP2C9 locus. Pharmacogenetics 2000; 10:85-9. [PMID: 10739176 DOI: 10.1097/00008571-200002000-00011] [Citation(s) in RCA: 96] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Affiliation(s)
- J Imai
- Division of Pharmaceutical Sciences, Kyushu University, Fukuoka, Japan
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Abstract
The efferent connections of the anterior hypothalamic nucleus (AH) were examined using biocytin as anterograde tracer in the cat. The results provide several new findings in addition to confirming earlier observations. In the hypothalamus, the AH projections terminated mainly in the medial regions which are related to the defensive, reproductive and feeding behaviors, and autonomic functions. Moreover, we found dense patches of the AH terminals in the medial preoptic area and ventromedial hypothalamic nucleus, which suggests the existence of modular connections between sub-regions of each nucleus. In addition, the AH projected to regions which may be related to the emotional and autonomic responses, i.e., such regions in the amygdala, midline thalamus, septum, subthalamus, and midbrain. The data suggest that the AH may play an important role in the autonomic functions and behaviors between animals, and thus may play a key role in the defensive behavior elicited in the medial preoptic area and ventromedial hypothalamic nucleus.
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Affiliation(s)
- H Kanemaru
- Department of Anatomy, Faculty of Medicine, Kyushu University, Fukuoka, Japan.
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Monji A, Yoshida I, Tashiro K, Hayashi Y, Matsuda K, Tashiro N. Inhibition of A beta fibril formation and A beta-induced cytotoxicity by senile plaque-associated proteins. Neurosci Lett 2000; 278:81-4. [PMID: 10643806 DOI: 10.1016/s0304-3940(99)00899-x] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [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: 11/28/2022]
Abstract
A beta neurotoxicity is generally believed to require A beta fibril formation. The prevention of A beta fibril formation thus seems to be a promising strategy for the treatment of AD. Recent studies have shown senile plaque-associated proteins such as laminin to have an inhibitory effect on both A beta40 and A beta42 fibril formation in vitro. In the present study, we thus investigated whether or not midkine (MK) and alpha2-macroglobulin (alpha2M), both of which are also senile plaque-associated proteins like laminin, affect A beta fibril formation and A beta-induced cytotoxicity. The present study demonstrated that both MK and alpha2M inhibit both A beta fibril formation and A beta-induced cytotoxicity in PC12 cells. The confirmation of the present results based on in vivo experiments is called for in future studies to clarify whether or not senile plaque-associated proteins such as MK and alpha2M can be a model for therapeutic agents in the treatment of AD.
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Affiliation(s)
- A Monji
- Department of Neuropsychiatry, Faculty of Medicine, Kyushu University, Fukuoka, Japan
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Mori Y, Kaname H, Sumida Y, Tanaka S, Kubo C, Tashiro N, Nomoto K. Changes in the leukocyte distribution and surface expression of adhesion molecules accompanied with hypothalamically induced restlessness in the cat. Neuroimmunomodulation 2000; 7:135-46. [PMID: 10754401 DOI: 10.1159/000026431] [Citation(s) in RCA: 7] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
One type of emotional behavior called restlessness occurs when the anteromedial hypothalamus is stimulated in cats. We examined the changes in the distribution and surface expression of adhesion molecules in leukocytes accompanied with restlessness. Mature female cats were used for this study. The cats were stimulated with 60 Hz sine wave train pulses (20-90 microA, 10 s in duration, at 5-min intervals) for 60 min. Samples of blood were collected from 30 min before stimulation up to several hours after the final stimulation. The number of granulocytes increased just after stimulation, while at the same time the expression of L-selectin decreased. On the other hand, the number of CD4+ and CD8+ T lymphocytes decreased at 1-2 h after the end of the stimulation, while the expression of L-selectin increased. In addition, the expression of LFA-1 and VLA-4 did not change. These data suggest that hypothalamically elicited restlessness is thus accompanied by a leukocyte distribution change, which might be mediated by changes in the expression of L-selectin on leukocytes. Plasma cortisol increased during stimulation in restlessness. However, during in vitro culture experiments, cortisol did not alter the expression of leukocyte L-selectin which thus indicated that cortisol does not directly affect the surface expression of L-selectin. These results thus suggest that hypothalamically induced restlessness is a useful stress model for psychoneuroimmunological studies.
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Affiliation(s)
- Y Mori
- Department of Neuropsychiatry, Faculty of Medicine, Kyushu University, Fukuoka City, Japan.
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Kuroki T, Kawahara T, Yonezawa Y, Tashiro N. Effects of the serotonin2A/2C receptor agonist and antagonist on phencyclidine-induced dopamine release in rat medial prefrontal cortex. Prog Neuropsychopharmacol Biol Psychiatry 1999; 23:1259-75. [PMID: 10581647 DOI: 10.1016/s0278-5846(99)00065-2] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [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: 11/28/2022]
Abstract
1. Systemic administration of PCP (7.5 mg/kg, i.p.) produced a greater increase in extracellular DA levels in the mPFC than in the STR and NAC, as determined by in vivo microdialysis of awake, freely moving rats. Preferential activation by PCP of prefrontal DA neurons may be, at least in part, the basis for the pathophysiology of PCP-induced psychosis as well as schizophrenia. 2. Recent studies suggest a possible involvement of 5-HT2A receptors in the pathophysiology and treatment of schizophrenia. This study was designed to examine whether and how 5-HT2A receptors modulate PCP-induced DA release in the mPFC. 3. The 5-HT2A/2C receptor agonist (+/-)-DOI (2.5 mg/kg, but not 0.75 mg/kg, i.p.), administered 60 min prior to PCP, significantly attenuated the PCP-induced increase in extracellular DA levels. Pretreatment of the 5-HT2A/2C receptor antagonist ritanserin (1.0 and 5.0 mg/kg, i.p.), administered 60 min prior to PCP, did not influence the PCP-induced increase. When administered alone, neither DOI (2.5 mg/kg) nor ritanserin (1.0 mg/kg) affected basal extracellular DA levels in the mPFC. 4. The NMDA receptor antagonist MK-801 (1.0 mg/kg, i.p.) also increased extracellular DA levels in the mPFC, but this effect was unaffected by pretreatment with DOI (2.5 mg/kg). 5. These results suggest that the stimulation of 5-HT2A/2C receptors may inhibit DA release in the mPFC when it is facilitated by PCP. Other than the NMDA receptor-mediated mechanism may also be involved in the neurochemical interaction between 5-HT2A receptors and PCP in the mPFC.
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Affiliation(s)
- T Kuroki
- Department of Psychiatry, Saga Medical School, Japan
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Monji A, Yoshida I, Koga H, Tashiro K, Tashiro N. Brain injury-induced rapid-cycling affective disorder successfully treated with valproate. Psychosomatics 1999; 40:448-9. [PMID: 10479952 DOI: 10.1016/s0033-3182(99)71215-6] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Tashiro K, Monji A, Yoshida I, Hayashi Y, Matsuda K, Tashiro N, Mitsuyama Y. An IKLLI-containing peptide derived from the laminin alpha1 chain mediating heparin-binding, cell adhesion, neurite outgrowth and proliferation, represents a binding site for integrin alpha3beta1 and heparan sulphate proteoglycan. Biochem J 1999; 340 ( Pt 1):119-26. [PMID: 10229666 PMCID: PMC1220229] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/12/2023]
Abstract
We synthesized and characterized several peptides containing the IKLLI sequence in the alpha1 chain of laminin-1. The IKLLI-containing peptides, such as LA4 (CSRNLSEIKLLISRARK), LA5 (EIKLLIS) and LA5L (SEIKLLIS), were found to mediate heparin binding and cell adhesion, while also promoting neurite outgrowth in PC12 cells. Furthermore, peptides LA4 and LA5 also mediated proliferation. However, a scrambled peptide, LA5S (ILEKSLI), did not show any of these activities. Anti-LA4 antibodies inhibited laminin- and LA5-mediated cell adhesion and neurite outgrowth, and anti-(integrin alpha3) and anti-(integrin beta1) antibodies inhibited LA5-mediated cell adhesion and neurite outgrowth. Heparin and heparan sulphate inhibited LA5-mediated heparin binding and PC12 cell adhesion in a dose- dependent manner. The IC50 for inhibition of heparin binding and cell adhesion was observed with 9 microM and 8 microM heparin/heparan sulphate respectively. Furthermore, heparan sulphate proteoglycan also inhibited LA5-mediated PC12 cell adhesion with an IC50 of 100 micrograms/ml. However, chondroitin sulphate (dermatan sulphate) did not inhibit cell adhesion. These data suggest that an IKLLI-containing peptide derived from the laminin alpha1 chain may be an active site of laminin and that its cell adhesion may thus interact with both integrin alpha3beta1 and cell- surface heparan sulphate proteoglycan.
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Affiliation(s)
- K Tashiro
- Department of Psychiatry, Miyazaki Medical College, 5200, Kihara, Kiyotake-cho, Miyazaki-gun, Miyazaki, 889-1692, Japan.
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Monji A, Tashiro K, Yoshida I, Kaname H, Hayashi Y, Matsuda K, Tashiro N. Laminin inhibits both Abeta40 and Abeta42 fibril formation but does not affect Abeta40 or Abeta42-induced cytotoxicity in PC12 cells. Neurosci Lett 1999; 266:85-8. [PMID: 10353333 DOI: 10.1016/s0304-3940(99)00273-6] [Citation(s) in RCA: 14] [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: 11/28/2022]
Abstract
Laminin has recently been reported to inhibit both Abeta40 and Abeta42 fibril formation in vitro. Laminin was thus suggested to be an effective therapeutic agent for Alzheimer's disease. However, some recent reports have shown that Abeta fibril formation may not necessarily be linked to the development of Abeta neurotoxicity. In the present study, we thus investigated whether or not laminin affects Abeta40 and Abeta42-induced neurotoxicity. The findings of the present study by using the 3-[4,5-dimethylthiazol-2-yl]-2,5-diphenyltetrazolium bromide (MTT) dye reduction test showed laminin not to have an inhibitory effect on Abeta40 or Abeta42-induced cytotoxicity in PC12 cells while Abeta fibril formation was inhibited under the conditions used in the present study. The findings of the present study therefore do not support the hypothesis that Abeta fibril formation is absolutely required for the development of Abeta cytotoxicity.
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Affiliation(s)
- A Monji
- Department of Neuropsychiatry, Faculty of Medicine, Kyushu University, Fukuoka, Japan
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