1
|
Yamagishi Y, Oginosawa Y, Ishii N, Nakamura Y, Yagyu K, Miyamoto T, Ohe H, Kohno R, Kataoka M, Abe H. Unusual atrial pacing induced by type II far-field p-wave sensing in a patient with complete atrioventricular block. Pacing Clin Electrophysiol 2024; 47:433-436. [PMID: 37221929 DOI: 10.1111/pace.14743] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/20/2023] [Revised: 05/13/2023] [Accepted: 05/16/2023] [Indexed: 05/25/2023]
Abstract
An 88-year-old Japanese woman underwent DDD pacemaker (MicroPort KORA 250 DR, V lead: VEGA R52) implantation for complete atrioventricular block. A 12-lead electrocardiogram for a routine examination showed atrial pacing within the intrinsic P wave, followed by inhibition of ventricular pacing. Pacemaker interrogation revealed no abnormalities in the basic parameters; however, ventricular pacing was inhibited by far-field sensing of intrinsic atrial waves before atrial events; type II far-field P-wave sensing. As a result, unusual atrial pacing occurred due to the pause suppression algorithm, which is the one of the functions that prevent atrial fibrillation development.
Collapse
Affiliation(s)
- Yasunobu Yamagishi
- The Second Department of Internal Medicine, University of Occupational and Environmental Health, Kitakyushu, Japan
| | - Yasushi Oginosawa
- The Second Department of Internal Medicine, University of Occupational and Environmental Health, Kitakyushu, Japan
| | - Nozomu Ishii
- The Second Department of Internal Medicine, University of Occupational and Environmental Health, Kitakyushu, Japan
| | - Yuki Nakamura
- The Second Department of Internal Medicine, University of Occupational and Environmental Health, Kitakyushu, Japan
| | - Keishiro Yagyu
- The Second Department of Internal Medicine, University of Occupational and Environmental Health, Kitakyushu, Japan
| | - Taro Miyamoto
- The Second Department of Internal Medicine, University of Occupational and Environmental Health, Kitakyushu, Japan
| | - Hisaharu Ohe
- The Second Department of Internal Medicine, University of Occupational and Environmental Health, Kitakyushu, Japan
| | - Ritsuko Kohno
- Department of Heart Rhythm Management, University of Occupational and Environmental Health, Kitakyushu, Japan
| | - Masaharu Kataoka
- The Second Department of Internal Medicine, University of Occupational and Environmental Health, Kitakyushu, Japan
| | - Haruhiko Abe
- Department of Heart Rhythm Management, University of Occupational and Environmental Health, Kitakyushu, Japan
| |
Collapse
|
2
|
Yamagishi Y, Oginosawa Y, Nakamura Y, Yagyu K, Miyamoto T. Spatiotemporal incremental change of radiofrequency catheter ablation-associated pulmonary vein calcifications. J Arrhythm 2023; 39:956-959. [PMID: 38045463 PMCID: PMC10692840 DOI: 10.1002/joa3.12925] [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: 04/25/2023] [Revised: 07/31/2023] [Accepted: 09/03/2023] [Indexed: 12/05/2023] Open
Abstract
We presented a detailed time course of RFCA-associated PV calcification process. Because RFCA-associated PV calcification may progress over time even with a single ablation, long-term caution should be paid in cases of especially extensive ablation and/or patients with stiff LA syndrome.
Collapse
Affiliation(s)
- Yasunobu Yamagishi
- The Second Department of Internal MedicineUniversity of Occupational and Environmental HealthKitakyushuJapan
| | - Yasushi Oginosawa
- The Second Department of Internal MedicineUniversity of Occupational and Environmental HealthKitakyushuJapan
| | - Yuki Nakamura
- The Second Department of Internal MedicineUniversity of Occupational and Environmental HealthKitakyushuJapan
| | - Keishiro Yagyu
- The Second Department of Internal MedicineUniversity of Occupational and Environmental HealthKitakyushuJapan
| | - Taro Miyamoto
- The Second Department of Internal MedicineUniversity of Occupational and Environmental HealthKitakyushuJapan
| |
Collapse
|
3
|
Yamagishi Y, Oginosawa Y, Fujino Y, Yagyu K, Miyamoto T, Tsukahara K, Ohe H, Kohno R, Kataoka M, Abe H. Relationship between Effective Refractory Period and Inducibility of Atrial Fibrillation from the Superior Vena Cava after Pulmonary Vein Isolation. Int Heart J 2022; 63:498-503. [DOI: 10.1536/ihj.21-803] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Affiliation(s)
- Yasunobu Yamagishi
- Second Department of Internal Medicine, University of Occupational and Environmental Health
| | - Yasushi Oginosawa
- Second Department of Internal Medicine, University of Occupational and Environmental Health
| | - Yoshihisa Fujino
- Department of Environmental Epidemiology, Institute of Industrial Ecological Sciences, University of Occupational and Environmental Health
| | - Keishiro Yagyu
- Second Department of Internal Medicine, University of Occupational and Environmental Health
| | - Taro Miyamoto
- Second Department of Internal Medicine, University of Occupational and Environmental Health
| | - Keita Tsukahara
- Second Department of Internal Medicine, University of Occupational and Environmental Health
| | - Hisaharu Ohe
- Second Department of Internal Medicine, University of Occupational and Environmental Health
| | - Ritsuko Kohno
- Department of Heart Rhythm Management, University of Occupational and Environmental Health
| | - Masaharu Kataoka
- Second Department of Internal Medicine, University of Occupational and Environmental Health
| | - Haruhiko Abe
- Department of Heart Rhythm Management, University of Occupational and Environmental Health
| |
Collapse
|
4
|
Tsukahara K, Oginosawa Y, Fujino Y, Keishiro Y, Miyamoto T, Yamagishi Y, Ohe H, Kohno R, Kataoka M, Abe H. Influence of the right ventricular septum/free-wall boundary (hinge) on differentiation of the ventricular lead implantation site. J Cardiol 2022; 80:332-338. [PMID: 35637122 DOI: 10.1016/j.jjcc.2022.05.005] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/03/2022] [Revised: 04/30/2022] [Accepted: 05/06/2022] [Indexed: 11/28/2022]
Abstract
BACKGROUND The prognosis associated with right ventricular (RV) free-wall pacing is worse than that of septal pacing. Identification of the pacing site using a 12‑lead electrocardiogram (ECG) is controversial and may be influenced by ECG changes within the same septal or free-wall area. The relationship between the diagnostic capabilities of ECG and pacing sites has previously been qualitatively evaluated. However, in this study, this relationship was analyzed quantitatively, and accurate evaluation of the pacing site was determined using computed tomography (CT). METHODS Of 779 consecutive outpatients, 65 who underwent pacemaker implantation and thoracic CT were prospectively included and classified into the following groups according to the lead tip position: free-wall, septal, or septum/free-wall boundary (hinge) group. The hinge was used as an anatomical marker, and the distance from the hinge to the lead tip was measured. Under RV pacing, a 12‑lead ECG was obtained. ECG findings were evaluated using three criteria (including lead I, II, and aVL and precordial leads V5 and V6) previously reported to be useful in differentiating pacing sites. RESULTS The lead tips were anchored at the free-wall in 10 patients, the septal wall in 19 patients, and the hinge in 32 patients. Paced QRS duration correlated with the distance from the hinge to the lead tip for the free-wall and septum (r = 0.47 and - 0.68, respectively). Estimation of the lead tip implantation site using the ECG algorithm was useful; however, the algorithm's accuracy decreased around the hinge. CONCLUSIONS ECG is useful in differentiating pacing sites but is less accurate around the hinge, which may be the reason that the identification of the RV pacing site using ECG remains controversial.
Collapse
Affiliation(s)
- Keita Tsukahara
- The Second Department of Internal Medicine, University of Occupational and Environmental Health, Kitakyushu, Japan
| | - Yasushi Oginosawa
- The Second Department of Internal Medicine, University of Occupational and Environmental Health, Kitakyushu, Japan.
| | - Yoshihisa Fujino
- The Department of Environmental Epidemiology Institute of Industrial Ecological Sciences, University of Occupational and Environmental Health, Kitakyushu, Japan
| | - Yagyu Keishiro
- The Second Department of Internal Medicine, University of Occupational and Environmental Health, Kitakyushu, Japan
| | - Taro Miyamoto
- The Second Department of Internal Medicine, University of Occupational and Environmental Health, Kitakyushu, Japan
| | - Yasunobu Yamagishi
- The Second Department of Internal Medicine, University of Occupational and Environmental Health, Kitakyushu, Japan
| | - Hisaharu Ohe
- The Second Department of Internal Medicine, University of Occupational and Environmental Health, Kitakyushu, Japan
| | - Ritsuko Kohno
- The Department of Heart Rhythm Management, University of Occupational and Environmental Health, Kitakyushu, Japan
| | - Masaharu Kataoka
- The Second Department of Internal Medicine, University of Occupational and Environmental Health, Kitakyushu, Japan
| | - Haruhiko Abe
- The Department of Heart Rhythm Management, University of Occupational and Environmental Health, Kitakyushu, Japan
| |
Collapse
|
5
|
Yamagishi Y, Oginosawa Y, Yagyu K, Miyamoto T, Keita T. “Carryover phenomenon” in subcutaneous implantable cardioverter‐defibrillator: Residual energy caused early shock to subsequent ventricular tachycardia. J Arrhythm 2022; 38:482-485. [PMID: 35785396 PMCID: PMC9237301 DOI: 10.1002/joa3.12715] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2021] [Revised: 02/14/2022] [Accepted: 03/28/2022] [Indexed: 11/12/2022] Open
Affiliation(s)
- Yasunobu Yamagishi
- The Second Department of Internal Medicine University of Occupational and Environmental Health, Japan Kitakyushu Japan
| | - Yasushi Oginosawa
- The Second Department of Internal Medicine University of Occupational and Environmental Health, Japan Kitakyushu Japan
| | - Keishiro Yagyu
- The Second Department of Internal Medicine University of Occupational and Environmental Health, Japan Kitakyushu Japan
| | - Taro Miyamoto
- The Second Department of Internal Medicine University of Occupational and Environmental Health, Japan Kitakyushu Japan
| | - Tsukahara Keita
- The Second Department of Internal Medicine University of Occupational and Environmental Health, Japan Kitakyushu Japan
| |
Collapse
|
6
|
Miyamoto T, Oginosawa Y, Fujino Y, Kuwata K, Yagyu K, Yamagishi Y, Tsukahara K, Ohe H, Kohno R, Kataoka M. Relationship between device displacement distance toward the caudal side during standing and pocket position laterality. Pacing Clin Electrophysiol 2022; 45:297-301. [PMID: 35172014 DOI: 10.1111/pace.14464] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/14/2021] [Revised: 11/23/2021] [Accepted: 01/23/2022] [Indexed: 11/30/2022]
Abstract
BACKGROUND The displacement of cardiac implantable electronic devices (CIEDs) toward the caudal side during standing after CIED implantation could cause lead dislodgement. This study investigated the relationship between supine pocket position and standing CIEDs' displacement distance after the implantation. METHODS After CIED surgeries performed at 2 hospitals between 2012 and 2020, 134 patients underwent postoperative chest x-rays in the supine and standing positions during hospitalization. To measure the displacement distance of CIEDs from the supine to the standing position, we identified the first thoracic vertebrae (Th1) in the supine position using the first rib as an index, drew a horizontal line at the lower edge of the Th1, and calculated the distance from that point to the upper edge of the CIED. The difference between measures for the two positions was compared. At the position of the pocket in the thorax in the supine position, the ratio of the distance between the thorax and the device is defined as the device thorax ratio (DTR). We examined the relationship between DTR and CIED displacement distance. RESULTS In this study, we included 134 patients (53% men; median age, 79 years, body mass index, 22.3 ± 3.4; pacemaker 93%, left implantation 96%). We found that the more lateral the position of the CIED pocket, the more the CIED fell when standing (confidence interval = 0.34-0.60, P < 0.001). CONCLUSIONS The farther the CIED was implanted outside the thorax in the supine position, the more significantly the CIED was displaced in the standing position. This article is protected by copyright. All rights reserved.
Collapse
Affiliation(s)
- Taro Miyamoto
- The Second Department of Internal Medicine, University of Occupational and Environmental Health, Kitakyushu, Fukuoka, Japan
| | - Yasushi Oginosawa
- The Second Department of Internal Medicine, University of Occupational and Environmental Health, Kitakyushu, Fukuoka, Japan
| | - Yoshihisa Fujino
- The Department of Environmental Epidemiology Institute of Industrial Ecological Sciences, University of Occupational and Environmental Health, Kitakyushu, Japan
| | - Koich Kuwata
- Tagawa Shiritsu hospital, Tagawa, Fukuoka, Japan
| | - Keishiro Yagyu
- The Second Department of Internal Medicine, University of Occupational and Environmental Health, Kitakyushu, Fukuoka, Japan
| | - Yasunobu Yamagishi
- The Second Department of Internal Medicine, University of Occupational and Environmental Health, Kitakyushu, Fukuoka, Japan
| | - Keita Tsukahara
- The Second Department of Internal Medicine, University of Occupational and Environmental Health, Kitakyushu, Fukuoka, Japan
| | - Hisaharu Ohe
- The Second Department of Internal Medicine, University of Occupational and Environmental Health, Kitakyushu, Fukuoka, Japan
| | - Ritsuko Kohno
- Department of Heart Rhythm Management, University of Occupational and Environmental Health, Kitakyushu, Fukuoka, Japan
| | - Masaharu Kataoka
- The Second Department of Internal Medicine, University of Occupational and Environmental Health, Kitakyushu, Fukuoka, Japan
| |
Collapse
|
7
|
Yamagishi Y, Oginosawa Y, Fujino Y, Yagyu K, Miyamoto T, Tsukahara K, Ohe H, Kohno R, Abe H. Incidence of out-of-hospital cardiac arrests and survival rates after 1 month among the Japanese working population: a cohort study. BMJ Open 2021; 11:e047932. [PMID: 34872993 PMCID: PMC8650304 DOI: 10.1136/bmjopen-2020-047932] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
Abstract
OBJECTIVES The prevention and improvement of the prognosis of out-of-hospital cardiac arrests (OHCAs) are important issues especially with respect to their social and economic significance in working populations. The age distribution of the working population in Japan is expected to change continually due to its ageing society and extension of retirement; however, few reports have examined the long-term condition of OHCA in the working population, defined by age. The aim of this study was to determine the incidence of OHCAs and the survival rates after 1 month, among the Japanese working population, defined by age, considering the changing age distribution. DESIGN AND SETTING We analysed the All-Japan Utstein registry, a prospective, nationwide, population-based, observational registry (2005-2016). PARTICIPANTS From the registry, 212 961 patients with OHCA from the Japanese working population (defined aged 20-69 years), with only cardiogenic aetiology participated in this study. These patients were further divided into four groups according to the type of citizen bystander (family, friends, work-colleagues and passers-by). PRIMARY AND SECONDARY OUTCOME MEASURES The main outcomes were 1-month survival with favourable neurological outcomes. RESULTS The incidence of OHCAs, in any age group, was almost constant during the 12-year period. The work-colleagues had the best prognosis despite having significantly longer times to initial defibrillations compared with the passers-by (13 vs 12 min, respectively, p<0.001) that was associated independently with 1-month survival with favourable neurological outcomes (adjusted OR: 0.94 (1 min increments), p<0.001). CONCLUSIONS In the 12-year period, the incidence of OHCAs in any age group remained almost constant, whereas the prognosis improved each year. Reducing the time to initial defibrillation may further improve the prognosis of OHCAs with a work-colleague bystander.
Collapse
Affiliation(s)
- Yasunobu Yamagishi
- The Second Department of Internal Medicine, University of Occupational and Environmental Health Japan, Kitakyushu, Fukuoka, Japan
| | - Yasushi Oginosawa
- The Second Department of Internal Medicine, University of Occupational and Environmental Health Japan, Kitakyushu, Fukuoka, Japan
| | - Yoshihisa Fujino
- Department of Environmental Epidemiology, Institute of Industrial Ecological Sciences, University of Occupational and Environmental Health Japan, Kitakyushu, Fukuoka, Japan
| | - Keishiro Yagyu
- The Second Department of Internal Medicine, University of Occupational and Environmental Health Japan, Kitakyushu, Fukuoka, Japan
| | - Taro Miyamoto
- The Second Department of Internal Medicine, University of Occupational and Environmental Health Japan, Kitakyushu, Fukuoka, Japan
| | - Keita Tsukahara
- The Second Department of Internal Medicine, University of Occupational and Environmental Health Japan, Kitakyushu, Fukuoka, Japan
| | - Hisaharu Ohe
- The Second Department of Internal Medicine, University of Occupational and Environmental Health Japan, Kitakyushu, Fukuoka, Japan
| | - Ritsuko Kohno
- Department of Heart Rhythm Management, University of Occupational and Environmental Health Japan, Kitakyushu, Fukuoka, Japan
| | - Haruhiko Abe
- Department of Heart Rhythm Management, University of Occupational and Environmental Health Japan, Kitakyushu, Fukuoka, Japan
| |
Collapse
|
8
|
Yamagishi Y, Oginosawa Y, Miki H, Yagyu K, Miyamoto T, Tsukahara K, Iwataki M, Ohe H, Kohno R, Kataoka M. Large discrepancy in optimal atrioventricular delay between sensed and paced atrial events in a pacemaker patient. Pacing Clin Electrophysiol 2021; 45:435-438. [PMID: 34793604 DOI: 10.1111/pace.14412] [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] [Subscribe] [Scholar Register] [Received: 05/30/2021] [Revised: 10/12/2021] [Accepted: 11/14/2021] [Indexed: 11/28/2022]
Abstract
A 74-year-old man experienced complete atrioventricular (AV) block 2 days after catheter ablation for right atrial (RA) macroreentrant tachycardia. We performed DDD pacemaker implantation with atrial septal pacing because other sites of pacing threshold were not acceptable. The maximum left ventricular outflow tract velocity time integral was 15.8 cm with sensed AV delay (40 ms) and 15.0 cm with paced AV delay (220 ms); however, this exceeded the pacemaker's maximum difference of 100 ms. We herein report the case of a large discrepancy in optimal AV delay intervals between sensed and paced atrial events, requiring consideration of proper pacemaker settings.
Collapse
Affiliation(s)
- Yasunobu Yamagishi
- The Second Department of Internal Medicine, University of Occupational and Environmental Health, Japan, Kitakyushu, Japan
| | - Yasushi Oginosawa
- The Second Department of Internal Medicine, University of Occupational and Environmental Health, Japan, Kitakyushu, Japan
| | - Hajime Miki
- The Second Department of Internal Medicine, University of Occupational and Environmental Health, Japan, Kitakyushu, Japan
| | - Keishiro Yagyu
- The Second Department of Internal Medicine, University of Occupational and Environmental Health, Japan, Kitakyushu, Japan
| | - Taro Miyamoto
- The Second Department of Internal Medicine, University of Occupational and Environmental Health, Japan, Kitakyushu, Japan
| | - Keita Tsukahara
- The Second Department of Internal Medicine, University of Occupational and Environmental Health, Japan, Kitakyushu, Japan
| | - Mai Iwataki
- The Second Department of Internal Medicine, University of Occupational and Environmental Health, Japan, Kitakyushu, Japan
| | - Hisaharu Ohe
- The Second Department of Internal Medicine, University of Occupational and Environmental Health, Japan, Kitakyushu, Japan
| | - Ritsuko Kohno
- Department of Heart Rhythm Management, University of Occupational and Environmental Health, Japan, Kitakyushu, Japan
| | - Masaharu Kataoka
- The Second Department of Internal Medicine, University of Occupational and Environmental Health, Japan, Kitakyushu, Japan
| |
Collapse
|
9
|
Miyamoto T, Oginosawa Y, Yagyu K, Yamagishi Y, Tsukahara K, Ohe H, Kohno R, Abe H, Kataoka M. Accessory pathway ablation during atrial fibrillation in Ebstein anomaly. Pacing Clin Electrophysiol 2021; 45:431-434. [PMID: 34752651 DOI: 10.1111/pace.14404] [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] [Subscribe] [Scholar Register] [Received: 08/18/2021] [Revised: 09/27/2021] [Accepted: 11/05/2021] [Indexed: 12/01/2022]
Abstract
An 84-year-old woman with type B Wolff-Parkinson-White (WPW) with Ebstein anomaly was admitted with heart failure. She had rapid wide QRS tachycardia due to accessory pathway (AP) conduction associated with atrial fibrillation (AF). Since transesophageal echocardiography before catheter ablation showed a left atrial thrombus, ablation was performed using a 3D mapping system under AF. After marking the functional tricuspid anulus with intra-cardiac echocardiography, 3D intra-cardiac electrogram visualization (ripple map) during AF enabled clear identification of location of the AP. After ablation, there was no complication of cerebral infarction, and the heart failure improved.
Collapse
Affiliation(s)
- Taro Miyamoto
- The Second Department of Internal Medicine, University of Occupational and Environmental Health, Kitakyushu, Japan
| | - Yasushi Oginosawa
- The Second Department of Internal Medicine, University of Occupational and Environmental Health, Kitakyushu, Japan
| | - Keishiro Yagyu
- The Second Department of Internal Medicine, University of Occupational and Environmental Health, Kitakyushu, Japan
| | - Yasunobu Yamagishi
- The Second Department of Internal Medicine, University of Occupational and Environmental Health, Kitakyushu, Japan
| | - Keita Tsukahara
- The Second Department of Internal Medicine, University of Occupational and Environmental Health, Kitakyushu, Japan
| | - Hisaharu Ohe
- The Second Department of Internal Medicine, University of Occupational and Environmental Health, Kitakyushu, Japan
| | - Ritsuko Kohno
- Department of Heart Rhythm Management, University of Occupational and Environmental Health, Kitakyushu, Fukuoka, Japan
| | - Haruhiko Abe
- Department of Heart Rhythm Management, University of Occupational and Environmental Health, Kitakyushu, Fukuoka, Japan
| | - Masaharu Kataoka
- The Second Department of Internal Medicine, University of Occupational and Environmental Health, Kitakyushu, Japan
| |
Collapse
|
10
|
Tsukahara K, Oginosawa Y, Yagyu K, Miyamoto T, Yamagishi Y, Ohe H, Kohno R, Kataoka M, Abe H. Adenosine revives catheter-induced mechanical blocks in radiofrequency ablation. J Cardiovasc Electrophysiol 2021; 32:3103-3106. [PMID: 34460986 DOI: 10.1111/jce.15235] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/24/2021] [Revised: 08/03/2021] [Accepted: 08/27/2021] [Indexed: 11/28/2022]
Abstract
Adenosine can hyperpolarize the atrial action potential, which helps rapidly re-establish the membrane potential in ablated sites and unmask "dormant conduction." It has been reported that pharmacological agents, including adenosine, were unable to revive traumatized tissues. We present the first case of the catheter-induced mechanical block ("bump" phenomenon) that was unmasked with adenosine administration in the working myocardium of the superior vena cava. This result may be because, unlike before, we could determine the force of contact between the tip of the ablation catheter and the myocardial tissue. This case suggests the clinical usefulness of adenosine for unmasking bumped sites.
Collapse
Affiliation(s)
- Keita Tsukahara
- The Second Department of Internal Medicine, University of Occupational and Environmental Health, Kitakyushu, Japan
| | - Yasushi Oginosawa
- The Second Department of Internal Medicine, University of Occupational and Environmental Health, Kitakyushu, Japan
| | - Keishiro Yagyu
- The Second Department of Internal Medicine, University of Occupational and Environmental Health, Kitakyushu, Japan
| | - Taro Miyamoto
- The Second Department of Internal Medicine, University of Occupational and Environmental Health, Kitakyushu, Japan
| | - Yasunobu Yamagishi
- The Second Department of Internal Medicine, University of Occupational and Environmental Health, Kitakyushu, Japan
| | - Hisaharu Ohe
- The Second Department of Internal Medicine, University of Occupational and Environmental Health, Kitakyushu, Japan
| | - Ritsuko Kohno
- The Department of Heart Rhythm Management, University of Occupational and Environmental Health, Kitakyushu, Japan
| | - Masaharu Kataoka
- The Second Department of Internal Medicine, University of Occupational and Environmental Health, Kitakyushu, Japan
| | - Haruhiko Abe
- The Department of Heart Rhythm Management, University of Occupational and Environmental Health, Kitakyushu, Japan
| |
Collapse
|
11
|
Tsukahara K, Oginosawa Y, Fujino Y, Honda T, Kikuchi K, Nozoe M, Uchida T, Minamiguchi H, Sonoda K, Ogawa M, Ideguchi T, Kizaki Y, Nakamura T, Oba K, Higa S, Yoshida K, Yagyu K, Miyamoto T, Yamagishi Y, Ohe H, Kohno R, Kataoka M, Otsuji Y, Abe H. RR interval variability in the evaluation of ventricular tachycardia and effects of implantable cardioverter defibrillator therapy. J Arrhythm 2021; 37:1052-1060. [PMID: 34386132 PMCID: PMC8339111 DOI: 10.1002/joa3.12551] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2021] [Revised: 04/13/2021] [Accepted: 04/21/2021] [Indexed: 11/09/2022] Open
Abstract
BACKGROUND An implantable cardioverter defibrillator (ICD) is the most reliable therapeutic device for preventing sudden cardiac death in patients with sustained ventricular tachycardia (VT). Regarding its effectiveness, targeted VT is defined based on the tachyarrhythmia cycle length. However, variations in RR interval variability of VTs may occur. Few studies have reported on VT characteristics and effects of ICD therapy according to the RR interval variability. We aimed to identify the clinical characteristics of VTs and ICD therapy effects according to the RR interval variability. METHODS We analyzed 821 VT episodes in 69 patients with ICDs or cardiac resynchronization therapy defibrillators. VTs were classified as irregular when the difference between two successive beats was >20 ms in at least one of 10 RR intervals; otherwise, they were classified as regular. We evaluated successful termination using anti-tachycardia pacing (ATP)/shock therapy, spontaneous termination, and acceleration between regular and irregular VTs. The RR interval variability reproducibility rates were evaluated. RESULTS Regular VT was significantly more successfully terminated than irregular VT by ATP. No significant difference was found in shock therapy or VT acceleration between the regular and irregular VTs. Spontaneous termination occurred significantly more often in irregular than in regular VT cases. The reproducibility rates of RR interval variability in each episode and in all episodes were 89% and 73%, respectively. CONCLUSIONS ATP therapy showed greater effectiveness for regular than for irregular VT. Spontaneous termination was more common in irregular than in regular VT. RR interval variability of VTs seems to be reproducible.
Collapse
Affiliation(s)
- Keita Tsukahara
- The Second Department of Internal MedicineUniversity of Occupational and Environment HealthKitakyushuJapan
| | - Yasushi Oginosawa
- The Second Department of Internal MedicineUniversity of Occupational and Environment HealthKitakyushuJapan
| | - Yoshihisa Fujino
- The Department of Environmental Epidemiology Institute of Industrial Ecological SciencesUniversity of Occupational and Environmental HealthKitakyushuJapan
| | - Toshihiro Honda
- Division of CardiologyKumamoto Junkankika HospitalKumamotoJapan
| | - Kan Kikuchi
- Division of CardiologyJapan Community Healthcare OrganizationKyushu HospitalKitakyusyuJapan
| | - Masatsugu Nozoe
- Division of CardiologySaiseikai Fukuoka General HospitalFukuokaJapan
| | - Takayuki Uchida
- Department of Cardiovascular SurgeryIizuka HospitalIizukaJapan
| | | | - Koichiro Sonoda
- Department of CardiologySasebo City General HospitalSaseboJapan
| | - Masahiro Ogawa
- Department of CardiologyFukuoka University School of MedicineFukuokaJapan
| | - Takeshi Ideguchi
- Department of Internal Medicine, Circulatory and Body Fluid RegulationFaculty of MedicineUniversity of MiyazakiMiyazakiJapan
| | | | - Toshihiro Nakamura
- Department of CardiologyNational Hospital Organization Kyushu Medical CenterFukuokaJapan
| | - Kageyuki Oba
- Department of CardiologyYuai Medical CenterOkinawaJapan
| | - Satoshi Higa
- Cardiac Electrophysiology and Pacing LaboratoryDivision of Cardiovascular MedicineMakiminato Central HospitalOkinawaJapan
| | - Keiki Yoshida
- Department of CardiologySaga‐ken Medical Centre KoseikanSagaJapan
| | - Keishiro Yagyu
- The Second Department of Internal MedicineUniversity of Occupational and Environment HealthKitakyushuJapan
| | - Taro Miyamoto
- The Second Department of Internal MedicineUniversity of Occupational and Environment HealthKitakyushuJapan
| | - Yasunobu Yamagishi
- The Second Department of Internal MedicineUniversity of Occupational and Environment HealthKitakyushuJapan
| | - Hisaharu Ohe
- The Second Department of Internal MedicineUniversity of Occupational and Environment HealthKitakyushuJapan
| | - Ritsuko Kohno
- Department of Heart Rhythm ManagementUniversity of Occupational and Environment HealthKitakyusyuJapan
| | - Masaharu Kataoka
- The Second Department of Internal MedicineUniversity of Occupational and Environment HealthKitakyushuJapan
| | - Yutaka Otsuji
- The Second Department of Internal MedicineUniversity of Occupational and Environment HealthKitakyushuJapan
| | - Haruhiko Abe
- Department of Heart Rhythm ManagementUniversity of Occupational and Environment HealthKitakyusyuJapan
| |
Collapse
|
12
|
Yamagishi Y, Oginosawa Y, Miyamoto T, Tukahara K, Ohe H, Kohno R, Otsuji Y, Abe H. The features and trends of out-of-hospital cardiac arrests in Japanese working generation: long-term aspects of a prospective, nationwide, population-based registry. Eur Heart J 2020. [DOI: 10.1093/ehjci/ehaa946.3513] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Background
Despite sudden cardiac death (SCD) in working generation is a crucial issue in terms of public health, social and economic significance, the long-term SCD condition in working generation is unclear.
Purpose
This study aimed to clarify the features and long-term trends of SCD in working generation from 2005 through 2016 in Japan, using a prospective, nationwide, population based out-of-hospital cardiac arrest (OHCA) registry.
Methods
We performed data analysis of the nation-wide registry in Japan who experienced OHCA during the 12 years. Working generation was defined as 20 to 69 years and we analyzed only definitive cardiogenic OHCA as an approximation of SCD.
Results
The number of definitive cardiogenic OHCA of working generation during the period was 66,214 and 31% of the events in whole population was working generation. Definitive cardiogenic OHCA in working generation in terms of both number and percentage of the population had been decreased from 6522 (0.07‰) in 2005 to 4910 (0.06‰) in 2016, bystander cardiopulmonary resuscitation (CPR) and usage of automated external defibrillator (AED) ratio increased from 32.7% in 2005 to 49.6% in 2016, and 0.3% in 2005 to 14.7% in 2016 respectively, and the survival rate after one-month improved year by year, from 12.8% in 2005 to 34.0% in 2016 (picture below). Among non-medical bystanders, CPR was most often performed by colleagues in this generation, while AED use rate by colleague was smaller, and the time from witness to initial defibrillation was significantly longer than by passerby. Good prognosis was observed in terms of one-month survival ratio and neurological outcome for those undergoing CPR by colleague and passerby compared with other bystanders. For 12 years, although the degree varies, all non-medical bystander had same tendency; bystander CPR and usage of AED ratio increased, and the survival rate after one-month and neurological outcome improved year by year.
Conclusions
Not only the number but the incidence of cardiogenic OHCA in working generation has been decreased in Japan. The positive prognosis of this generation may be related to CPR by colleagues.
Figure 1. OHCA number & 1-month survival rate
Funding Acknowledgement
Type of funding source: None
Collapse
Affiliation(s)
- Y Yamagishi
- University of Occupational and Environmental Health, The 2nd Department of Internal Medicine, Kitakyushu, Japan
| | - Y Oginosawa
- University of Occupational and Environmental Health, The 2nd Department of Internal Medicine, Kitakyushu, Japan
| | - T Miyamoto
- University of Occupational and Environmental Health, The 2nd Department of Internal Medicine, Kitakyushu, Japan
| | - K Tukahara
- University of Occupational and Environmental Health, The 2nd Department of Internal Medicine, Kitakyushu, Japan
| | - H Ohe
- University of Occupational and Environmental Health, The 2nd Department of Internal Medicine, Kitakyushu, Japan
| | - R Kohno
- University of Occupational and Environmental Health, The Division of Heart Rhythm Management, Kitakyushu, Japan
| | - Y Otsuji
- University of Occupational and Environmental Health, The 2nd Department of Internal Medicine, Kitakyushu, Japan
| | - H Abe
- University of Occupational and Environmental Health, The Division of Heart Rhythm Management, Kitakyushu, Japan
| |
Collapse
|
13
|
Ohe H, Oginosawa Y, Yamagishi Y, Miyamoto T, Tsukahara K, Kohno R, Abe H, Otsuji Y. Rate-dependent pacing failure after pacemaker implantation: Novel insights into the mechanism of using adenosine. J Cardiovasc Electrophysiol 2020; 31:2765-2769. [PMID: 32757423 DOI: 10.1111/jce.14704] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/22/2020] [Revised: 07/21/2020] [Accepted: 07/26/2020] [Indexed: 11/27/2022]
Abstract
An 82-year-old woman received pacemaker implantation for sick sinus syndrome. Two days after the implantation, electrocardiography showed 2:1 atrial pacing failure, followed by a bradycardia-dependent increase in the atrial pacing threshold during a pacemaker examination. However, transient 1:1 atrial pacing capture recovered by adenosine triphosphate (ATP) administration, which was performed to evaluate the bradycardia-dependent pacing failure mechanism. We considered this phenomenon to be caused by Phase 4 depolarization and avoided replacing this atrial lead. Three weeks later, the atrial pacing threshold had improved. We report the potential role of Phase 4 depolarization in a bradycardia-dependent increase in pacing threshold by using ATP.
Collapse
Affiliation(s)
- Hisaharu Ohe
- The Second Department of Internal Medicine, University of Occupational and Environmental Health, Kitakyushu, Japan
| | - Yasushi Oginosawa
- The Second Department of Internal Medicine, University of Occupational and Environmental Health, Kitakyushu, Japan
| | - Yasunobu Yamagishi
- The Second Department of Internal Medicine, University of Occupational and Environmental Health, Kitakyushu, Japan
| | - Taro Miyamoto
- The Second Department of Internal Medicine, University of Occupational and Environmental Health, Kitakyushu, Japan
| | - Keita Tsukahara
- The Second Department of Internal Medicine, University of Occupational and Environmental Health, Kitakyushu, Japan
| | - Ritsuko Kohno
- Department of Heart Rhythm Management, University of Occupational and Environmental Health, Kitakyushu, Japan
| | - Haruhiko Abe
- Department of Heart Rhythm Management, University of Occupational and Environmental Health, Kitakyushu, Japan
| | - Yutaka Otsuji
- The Second Department of Internal Medicine, University of Occupational and Environmental Health, Kitakyushu, Japan
| |
Collapse
|
14
|
Koizumi Y, Sakata M, Shiota A, Hagihara M, Asai N, Yamagishi Y, Mikamo H. The diagnostic ability of plasma Procalcitonin levels in Gram positive bacteremia. J Infect Public Health 2020. [DOI: 10.1016/j.jiph.2020.01.081] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
|
15
|
Tsukahara K, Oginosawa Y, Fujino Y, Ohe H, Yamagishi Y, Iwataki M, Sonoda S, Kohno R, Otsuji Y, Abe H. Prevention of serious air embolism during cryoballoon ablation; risk assessment of air intrusion into the sheath by catheter selection and change in intrathoracic pressure: An ex vivo study. J Cardiovasc Electrophysiol 2019; 30:2944-2949. [PMID: 31588621 DOI: 10.1111/jce.14208] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/25/2019] [Revised: 09/06/2019] [Accepted: 09/23/2019] [Indexed: 11/27/2022]
Abstract
INTRODUCTION One cause of cerebral infarction during cryoballoon ablation is the entry of air into a sheath due to the use of inappropriate catheters. It is known that the left atrial pressure of patients with obstructive sleep apnea syndrome can be negative. However, the effects of catheter selection and negative pressure changes in the sheath on air intrusion are not yet well understood. The aim of this study was to evaluate how catheter selection and negative pressure changes affect air intrusion and to perform countermeasures for air intrusion. METHODS AND RESULTS This experiment used siphon principle to create negative pressure in the sheath. Noncryoablation catheters (not designed exclusively for cryoballoon ablation) and cryoballoon catheters were investigated. Catheters were inserted into the sheath and then removed. Thereafter, the amount of air in the sheath was measured. For catheters producing significantly larger amounts of air intrusion, the catheters were inserted via a long sheath in the sheath (sheath-in-sheath technique) and the same procedures were repeated. We found that the amount of air intrusion through most of the noncryoablation catheters was significantly larger than that through cryoablation catheters. An increase in the magnitude of negative pressure in the sheath resulted in a proportional increase in air intrusion, but the sheath-in-sheath technique significantly reduced air intrusion. CONCLUSION The amount of air intrusion increased when using catheters with complicated tip shapes and thin outer diameters and when the magnitude of negative pressure in the sheath increased. The sheath-in-sheath technique may be an effective countermeasure.
Collapse
Affiliation(s)
- Keita Tsukahara
- The Second Department of Internal Medicine, University of Occupational and Environmental Health, Kitakyusyu, Japan
| | - Yasushi Oginosawa
- The Second Department of Internal Medicine, University of Occupational and Environmental Health, Kitakyusyu, Japan
| | - Yoshihisa Fujino
- The Department of Environmental Epidemiology, Institute of Industrial Ecological Sciences, University of Occupational and Environmental Health, Kitakyusyu, Japan
| | - Hisaharu Ohe
- The Second Department of Internal Medicine, University of Occupational and Environmental Health, Kitakyusyu, Japan
| | - Yasunobu Yamagishi
- The Second Department of Internal Medicine, University of Occupational and Environmental Health, Kitakyusyu, Japan
| | - Mai Iwataki
- The Second Department of Internal Medicine, University of Occupational and Environmental Health, Kitakyusyu, Japan
| | - Shinjo Sonoda
- The Second Department of Internal Medicine, University of Occupational and Environmental Health, Kitakyusyu, Japan
| | - Ritsuko Kohno
- The Division of Heart Rhythm Management, University of Occupational and Environmental Health, Kitakyusyu, Japan
| | - Yutaka Otsuji
- The Second Department of Internal Medicine, University of Occupational and Environmental Health, Kitakyusyu, Japan
| | - Haruhiko Abe
- The Division of Heart Rhythm Management, University of Occupational and Environmental Health, Kitakyusyu, Japan
| |
Collapse
|
16
|
Namkoong H, Asakura T, Ishii M, Yoda S, Masaki K, Sakagami T, Iwasaki E, Yamagishi Y, Kanai T, Betsuyaku T, Hasegawa N. First report of hepatobiliary Mycobacterium avium infection developing obstructive jaundice in a patient with neutralizing anti-interferon-gamma autoantibodies. New Microbes New Infect 2018; 27:4-6. [PMID: 30505452 PMCID: PMC6249401 DOI: 10.1016/j.nmni.2018.10.001] [Citation(s) in RCA: 2] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2018] [Revised: 09/24/2018] [Accepted: 10/12/2018] [Indexed: 11/04/2022] Open
Abstract
This study describes a patient who experienced hepatobiliary Mycobacterium avium infection associated with neutralizing anti–interferon gamma (IFN-γ) autoantibodies during treatment for disseminated M. avium disease. Hepatobiliary M. avium infection should be considered in jaundiced patients with neutralizing anti–IFN-γ autoantibodies, including those receiving antimycobacterial therapy for disseminated M. avium disease.
Collapse
Affiliation(s)
- H Namkoong
- Keio University School of Medicine, Tokyo, Japan.,Eiju General Hospital, Tokyo, Japan
| | - T Asakura
- Keio University School of Medicine, Tokyo, Japan
| | - M Ishii
- Keio University School of Medicine, Tokyo, Japan
| | - S Yoda
- JCHO Saitama Medical Center, Saitama, Japan
| | - K Masaki
- Keio University School of Medicine, Tokyo, Japan
| | - T Sakagami
- Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
| | - E Iwasaki
- Keio University School of Medicine, Tokyo, Japan
| | - Y Yamagishi
- Keio University School of Medicine, Tokyo, Japan
| | - T Kanai
- Keio University School of Medicine, Tokyo, Japan
| | - T Betsuyaku
- Keio University School of Medicine, Tokyo, Japan
| | - N Hasegawa
- Keio University School of Medicine, Tokyo, Japan
| |
Collapse
|
17
|
Sato R, Ikuma M, Takagi K, Asano J, Yamagishi Y, Matsunaga Y, Watanabe H. AB1096 Exposure of Drugs for Autoimmune Disease during Pregnancy and Perinatal Outcomes: an Investigation of the Regulator in Japan. Ann Rheum Dis 2014. [DOI: 10.1136/annrheumdis-2014-eular.4118] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
|
18
|
Yamagishi Y, Nakashima S, Oiso K, Yamada TK. Recovery of nanomolecular electronic states from tunneling spectroscopy: LDOS of low-dimensional phthalocyanine molecular structures on Cu(111). Nanotechnology 2013; 24:395704. [PMID: 24008566 DOI: 10.1088/0957-4484/24/39/395704] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Organic nanomolecules have become one of the most attractive materials for new nanoelectronics devices. Understanding of the electronic density of states around the Fermi energy of low-dimensional molecules is crucial in designing the electronic properties of molecular devices. The low dimensionality of nanomolecules results in new electronic properties owing to their unique symmetry. Scanning tunneling spectroscopy is one of the most effective techniques for studying the electronic states of nanomolecules, particularly near the Fermi energy (±1.5 eV), whereas these molecular electronic states are frequently buried by the tunneling probability background in tunneling spectroscopy, resulting in incorrect determination of the molecular electronic states. Here, we demonstrate how to recover nanomolecular electronic states from dI/dV curves obtained by tunneling spectroscopy. Precise local density of states (LDOS) peaks for low-dimensional nanostructures (monolayer ultrathin films, one-dimensional chains, and single molecules) of phthalocyanine (H2Pc) molecules grown on noble fcc-Cu(111) were obtained.
Collapse
Affiliation(s)
- Y Yamagishi
- Graduate School of Advanced Integration Science, Chiba University, 1-33, Yayoi-cho, Inage-ku, Chiba-shi 263-8522, Chiba, Japan
| | | | | | | |
Collapse
|
19
|
Hamada Y, Kimura M, Kawasumi N, Yamagishi Y, Mikamo H. P25 Population pharmacokinetics of voriconazole in Japanese adult patients. Int J Antimicrob Agents 2013. [DOI: 10.1016/s0924-8579(13)70270-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
20
|
Yamagishi Y, Mikamo H. P108 Antimicrobial susceptibility of Prevotella species. Int J Antimicrob Agents 2013. [DOI: 10.1016/s0924-8579(13)70352-2] [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]
|
21
|
Yamagishi Y, Watari A, Hayata Y, Li X, Kondoh M, Tsutsumi Y, Yagi K. Hepatotoxicity of sub-nanosized platinum particles in mice. Pharmazie 2013; 68:178-182. [PMID: 23556335] [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: 06/02/2023]
Abstract
Nano-sized materials are widely used in consumer products, medical devices and engineered pharmaceuticals. Advances in nanotechnology have resulted in materials smaller than the nanoscale, but the biologic safety of the sub-nanosized materials has not been fully assessed. In this study, we evaluated the toxic effects of sub-nanosized platinum particles (snPt) in the mouse liver. After intravenous administration of snPt (15 mg/kg body weight) into mice, histological analysis revealed acute hepatic injury, and biochemical analysis showed increased levels of serum markers of liver injury and inflammatory cytokines. In contrast, administration of nano-sized platinum particles did not produce these abnormalities. Furthermore, snPt induced cytotoxicity when directly applied to primary hepatocytes. These data suggest that snPt have the potential to induce hepatotoxicity. These findings provide useful information on the further development of sub-nanosized materials.
Collapse
Affiliation(s)
- Y Yamagishi
- Laboratories of Bio-Functional Molecular Chemistry, Graduate School of Pharmaceutical Sciences, Osaka University, Japan
| | | | | | | | | | | | | |
Collapse
|
22
|
Oshima G, Shinoda M, Tanabe M, Ebinuma H, Nishiyama R, Takano K, Yamada S, Miyasho T, Masugi Y, Matsuda S, Suda K, Fukunaga K, Matsubara K, Hibi T, Yagi H, Hayashida T, Yamagishi Y, Obara H, Itano O, Takeuchi H, Kawachi S, Saito H, Hibi T, Maruyama I, Kitagawa Y. Increased plasma levels of high mobility group box 1 in patients with acute liver failure. ACTA ACUST UNITED AC 2012; 48:154-62. [PMID: 22585050 DOI: 10.1159/000338363] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2011] [Accepted: 03/07/2012] [Indexed: 11/19/2022]
Abstract
BACKGROUND High-mobility group box 1 (HMGB1) is a monocyte-derived late-acting inflammatory mediator, which is released in conditions such as shock, tissue injury and endotoxin-induced lethality. In this study, we determined the plasma and hepatic tissue levels of HMGB1 in patients with acute liver failure (ALF). PATIENTS AND METHODS We determined the plasma levels of HMGB1 and aspartate aminotransferase (AST) in 7 healthy volunteers (HVs), 40 patients with liver cirrhosis (LC), 37 patients with chronic hepatitis (CH), 18 patients with severe acute hepatitis (AH), and 14 patients with fulminant hepatitis (FH). The 14 patients with FH were divided into two subgroups depending upon the history of plasma exchange (PE) before their plasma sample collection. The hepatic levels of HMGB1 were measured in tissue samples from 3 patients with FH who underwent living-donor liver transplantation and from 3 healthy living donors. Hepatic tissue samples were also subjected to immunohistochemical examination for HMGB1. RESULTS The plasma levels of HMGB1 (ng/ml) were higher in patients with liver diseases, especially in FH patients with no history of PE, than in HVs (0.3 ± 0.3 in HVs, 4.0 ± 2.0 in LC, 5.2 ± 2.6 in CH, 8.6 ± 4.8 in severe AH, 7.8 ± 2.7 in FH with a history of PE, and 12.5 ± 2.6 in FH with no history of PE, p < 0.05 in each comparison). There was a strong and statistically significant relationship between the mean plasma HMGB1 level and the logarithm of the mean AST level (R = 0.900, p < 0.05). The hepatic tissue levels of HMGB1 (ng/mg tissue protein) were lower in patients with FH than in healthy donors (539 ± 116 in FH vs. 874 ± 81 in healthy donors, p < 0.05). Immunohistochemical staining for HMGB1 was strong and clear in the nuclei of hepatocytes in liver sections from healthy donors, but little staining in either nuclei or cytoplasm was evident in specimens from patients with FH. CONCLUSION We confirmed that plasma HMGB1 levels were increased in patients with ALF. Based on a comparison between HMGB1 contents in normal and ALF livers, it is very likely that HMGB1 is released from injured liver tissue.
Collapse
Affiliation(s)
- G Oshima
- Department of Surgery, Keio University School of Medicine, Tokyo, Japan
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
23
|
Yamagishi Y, Kimura S, Ishizawa K, Kikuchi M, Morikawa H, Kojima T. Visualization of snowdrift around buildings of an Antarctic base through numerical simulation. J Vis (Tokyo) 2011. [DOI: 10.1007/s12650-011-0105-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
24
|
|
25
|
Abstract
PURPOSE To examine whether X-rays induce sister chromatid exchanges (SCE). MATERIALS AND METHODS Peripheral lymphocytes irradiated in vitro or in vivo were cultured and treated with okadaic acid to generate premature chromosome condensation (PCC). When identical spreads were analysed using conventional Giemsa staining and pan-centromeric fluorescence in situ hybridization painting, ring chromosomes were observed. RESULTS In PCC preparations, cells in the late G(2) phase and late M phase were observed. In late M phase cells, 17-20% of ring chromosomes lacked one chromatid (single-chromatid ring), irrespective of dose. Both the distribution patterns of centromeres in rings and intercentromere distances in dicentric rings indicate that a considerable number of single-chromatid rings might be formed by SCE occurring in a chromosome-type ring, thereby joining strands of two rings, followed by a transformation into one ring. These single-chromatid rings were less stable in vivo than chromosome-type rings. CONCLUSION Single-chromatid rings visualized clearly using PCC techniques indicate SCE in the respective rings. Contrary to the conventional SCE-detecting technique, this approach does not require the use of bromodeoxyuridine, which itself leads to SCE. Some of the observed SCE might be secondary products resulting from the repair of radiation-induced DNA damage, while others may be spontaneous.
Collapse
Affiliation(s)
- R Kanda
- Radiation Hazards Research Group National Institute of Radiological Sciences 4-9-1, Anagawa, Inage-ku, Chiba 263-8555 Japan
| | | | | |
Collapse
|
26
|
Yamagishi Y, Nagao H, Suzuki K, Tamura H, Hatakeyama T, Yanaka H, Tuboi S. Erratum: Google Earth as Geoscience Data Browser Project:. Data Sci J 2009. [DOI: 10.2481/dsj.8-s502] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
|
27
|
Yamagishi Y, Nagao H, Suzuki K, Tamura H, Hatakeyama T, Yanaka H, Tuboi S. Google Earth as Geoscience Data Browser Project: Development of a Tool to Convert JAMSTEC Research Vessel Navigation Data to KML. Data Sci J 2009. [DOI: 10.2481/dsj.8.s85] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
|
28
|
Yamagishi Y, Asai K. The olympics and visualization. J Vis (Tokyo) 2008. [DOI: 10.1007/bf03182188] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
29
|
Kuno T, Yamagishi Y, Kawamura T, Nitta K. Deformation mechanism under essential work of fracture process in polycyclo-olefin materials. EXPRESS POLYM LETT 2008. [DOI: 10.3144/expresspolymlett.2008.49] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
|
30
|
|
31
|
Konno M, Okudaira K, Sano T, Kawaguchi Y, Yamagishi Y. Peptides with distorted trans-proline in the counter direction but not the intermediate from transto cisisomerization bind cyclophilin B. Acta Crystallogr A 2002. [DOI: 10.1107/s0108767302088694] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
|
32
|
Notoya M, Wakashima M, Yamagishi Y, Furukawa M. A follow-up study of a congenitally deaf child with a cochlear implant by a multidisciplinary team. Adv Otorhinolaryngol 2002; 57:288-9. [PMID: 11892171 DOI: 10.1159/000059126] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Affiliation(s)
- M Notoya
- Department of Otolaryngology, School of Medicine, Kanazawa University, Kanazawa, Japan.
| | | | | | | |
Collapse
|
33
|
Horie Y, Kajihara M, Yamagishi Y, Kimura H, Tamai H, Kato S, Ishii H. A Japanese herbal medicine, Sho-saiko-to, prevents gut ischemia/reperfusion-induced hepatic microvascular dysfunction in rats. J Gastroenterol Hepatol 2001; 16:1260-6. [PMID: 11903745 DOI: 10.1046/j.1440-1746.2001.02622.x] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
BACKGROUND AND AIM We have reported that gut ischemia/reperfusion (I/R) causes hepatic microvascular dysfunction. Nitric oxide (NO) has been found to be a modulator of the adhesive interactions between leukocytes, platelets, and endothelial cells. Sho-saiko-to (TJ-9), a Japanese herbal medicine, is reported to have protective effects against liver injury and to regulate NO production. The objective of this study was to determine whether TJ-9 affects hepatic microvascular dysfunction elicited by gut I/R, and to investigate the role of NO. METHODS Male Wistar rats were exposed to 30 min of gut ischemia followed by 60 min of reperfusion. Intravital microscopy was used to monitor leukocyte recruitment and the number of non-perfused sinusoids (NPS). Plasma tumor necrosis factor (TNF)-alpha and alanine aminotransferase (ALT) activities were measured. In another set of experiments, TJ-9 (1 g/kg per day intragastrically) was administered to rats for 7 days. In some experiments, dexamethasone (ST) (2 mg/kg per day intravenously) was administered. RESULTS In control rats, gut I/R elicited increases in the number of stationary leukocytes, NPS, and plasma TNF-alpha and ALT activities, and these changes were mitigated by the pretreatment with TJ-9. Pretreatment with an NO synthase inhibitor diminished the protective effects of TJ-9 on the increase in leukostasis in the pericentral region, NPS, and plasma TNF-alpha levels, but not its effect on the increase in leukostasis in the midzonal region, total number of stationary leukocytes, or plasma ALT activities. Pretreatment with TJ-9 increased plasma nitrite/nitrate levels. The responses caused by gut I/R were attenuated by the pretreatment with ST. Pretreatment with an NO synthase inhibitor did not affect the effect of ST. CONCLUSIONS These results suggest that TJ-9 attenuates the gut I/R-induced hepatic microvascular dysfunction and inflammatory responses such as TNF-alpha production in the early phase via enhancement of NO production, and sequential hepatocellular damage via its anti-inflammatory effect like corticosteroid effect.
Collapse
Affiliation(s)
- Y Horie
- Department of Internal Medicine, School of Medicine, Keio University, Tokyo, Japan
| | | | | | | | | | | | | |
Collapse
|
34
|
Yamagishi Y, Ebinuma H, Saito H, Ishii H. [Hepatocellular carcinoma associated with alcoholic liver diseases]. Nihon Rinsho 2001; 59 Suppl 6:450-4. [PMID: 11761992] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
Affiliation(s)
- Y Yamagishi
- Department of Internal Medicine, School of Medicine, Keio University
| | | | | | | |
Collapse
|
35
|
Saito M, Yamagishi Y, Saito S, Edo K. [Medical education for students in compulsory education: the conception of the preparation of three graded textbooks and preliminary evaluation of lectures using these textbooks]. YAKUGAKU ZASSHI 2001; 121:247-52. [PMID: 11265120 DOI: 10.1248/yakushi.121.247] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [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
The school pharmacist in our hospital pharmacy used three graded textbooks about medicine for students at the Sukagawa School for the Health-Impaired (Fukushima Medical University Hospital Branch (H. I. school)). A revised textbook for 4th-6th grade elementary school students containing 12 important items of information about medicine, a new picture textbook for 1st-3rd grade elementary school students, and a new textbook containing practical data for junior high school students were prepared by supplementing original information with illustrations, simplified expression and large type face. Additionally, the pronunciation of Chinese characters was included in the textbook for the 1st-3rd grade elementary school students. In this study, 9 students from H. I. school and 37 students from Koyase junior high school took part in a questionnaire and an examination evaluating the usefulness of the lectures, and these textbooks, in regard to the student's recognition and understanding of medicine. Most students answered that the lectures and textbooks helped them to understand medicine. Furthermore, the results of the examination indicated that the students had a general understanding of medicine. In conclusion, we suggest that it is important for students in compulsory education to learn about medicine, and that according to the preliminary result of questionnaires and examinations, both the lectures and textbooks were useful to help the students to understand more about medicine.
Collapse
Affiliation(s)
- M Saito
- Fukushima Medical University Hospital, 1-Hikarigaoka, Fukushima 960-1295, Japan
| | | | | | | |
Collapse
|
36
|
Nishihara Y, Tsujii E, Yamagishi Y, Sakamoto K, Tsurumi Y, Furukawa S, Ohtsu R, Kino T, Hino M, Yamashita M, Hashimoto S. FR198248, a new anti-influenza agent isolated from Apsergillus terreus No 13830. I. Taxomony, fermentation, isolation, physico-chemical properties and biological activities. J Antibiot (Tokyo) 2001; 54:136-43. [PMID: 11302485 DOI: 10.7164/antibiotics.54.136] [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: 11/21/2022]
Abstract
A novel anti-influenza agent, FR198248, was isolated from the cultured broth of a fungal strain No.13830. The strain was identified as Aspergillus terreus from morphological characteristics. FR198248, a new type of hydroxyl benzaldehyde compound, showed antiinfluenza virus activity in Madin-Darby canine kidney (MDCK) cells in vitro. The mode of action of FR198248 against influenza virus A could be ascribed to an inhibitory effect on the stage of virus adsorption. Furthermore, FR198248 possessed potent in vivo anti-influenza activity in a murine model of respiratory tract infection.
Collapse
Affiliation(s)
- Y Nishihara
- Fermentation Development Laboratories, Fujisawa Pharmaceutical Co., Ltd., Aichi, Japan.
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
37
|
Nishihara Y, Tsujii E, Yamagishi Y, Kino T, Hino M, Yamashita M, Hashimoto S. FR191512, a novel anti-influenza agent isolated from a fungus strain No.17415. II. Biological properties. J Antibiot (Tokyo) 2000; 53:1341-5. [PMID: 11217798 DOI: 10.7164/antibiotics.53.1341] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
FR191512, a novel polyphenolic compound, inhibited the infectivity of influenza A virus in Madin-Darby canine kidney (MDCK) cells in vitro. Furthermore, FR191512 showed good in vivo anti-influenza activity in a mouse model of intranasal infection with influenza A virus. The cytotoxic activity of FR191512 against MDCK cells was very weak.
Collapse
Affiliation(s)
- Y Nishihara
- Fermentation Development Laboratories, Fujisawa Pharmaceutical Co, Ltd, Nishikasugai-gun, Aichi, Japan
| | | | | | | | | | | | | |
Collapse
|
38
|
Horie Y, Kimura H, Kato S, Ohki E, Tamai H, Yamagishi Y, Ishii H. Role of nitric oxide in endotoxin-induced hepatic microvascular dysfunction in rats chronically fed ethanol. Alcohol Clin Exp Res 2000. [PMID: 10888073 DOI: 10.1111/j.1530-0277.2000.tb02064.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
BACKGROUND Nitric oxide (NO) appears to be involved in the pathogenesis of endotoxin-induced liver injury. However, little is known about how NO acts on the hepatic microcirculation, especially in alcohol-fed animals. We examined the roles of NO in endotoxin-induced hepatic microvascular dysfunction in control and ethanol-fed rats. METHODS One lobe of the liver was observed with an intravital microscope. Flow velocity of fluorescein isothiocyanate-labeled erythrocytes in sinusoids was measured with an off-line velocimeter. Portal pressure and mean arterial pressure also were measured. RESULTS After administration of endotoxin to control, the flow velocity decreased after 30 min. Portal pressure increased after 45 min. However, in ethanol-fed rats, both the flow velocity and portal pressure temporarily increased in the early phase. Thereafter, the flow velocity decreased and portal pressure increased. At 30 min after administration of the endotoxin, pretreatment with 10 mg/kg of an NO synthase inhibitor, NG-monomethyl-L-arginine (L-NMMA), enhanced the endotoxin-induced decrease in the velocity of erythrocytes in the midzonal region of both control and ethanol-fed rats. Although 0.5 mg/kg of L-NMMA enhanced the endotoxin-induced reduction of erythrocyte velocity in the midzonal region of ethanol-fed rats, L-NMMA enhanced the endotoxin-induced reduction of erythrocyte velocity in the pericentral region of control rats. At 60 min after the endotoxin administration, L-NMMA did not affect the endotoxin-induced decrease of erythrocyte velocity in either control or ethanol-fed rats. Although 10 mg/kg of L-NMMA increased mean arterial pressure both in control and ethanol-fed rats, 0.5 mg/kg of L-NMMA did not change mean arterial pressure in either control or ethanol-fed rats. CONCLUSIONS These results suggest that NO is involved in endotoxin-induced hepatic microvascular dysfunction, which may contribute to the sequential liver injury, especially in alcohol-fed animals.
Collapse
Affiliation(s)
- Y Horie
- Department of Internal Medicine, School of Medicine, Keio University, Tokyo, Japan
| | | | | | | | | | | | | |
Collapse
|
39
|
Niikura T, Murayama N, Hashimoto Y, Ito Y, Yamagishi Y, Matsuoka M, Takeuchi Y, Aiso S, Nishimoto I. V642I APP-inducible neuronal cells: a model system for investigating Alzheimer's disorders. Biochem Biophys Res Commun 2000; 274:445-54. [PMID: 10913358 DOI: 10.1006/bbrc.2000.3143] [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: 12/30/2022]
Abstract
APP is a precursor of beta amyloid deposited in Alzheimer's disease (AD). Although genetic studies established that mutations in APP cause familial AD (FAD), the mechanism for neuronal death by FAD mutants has not been well understood. We established neuronal cells (F11/EcR/V642I cells) in which V642I APP was inducibly expressed by ecdysone. Treatment with ecdysone, but not vehicle, killed most cells within a few days, with rounding, shrinkage, and detachment as well as nuclear fragmentation. Death was suppressed by Ac-DEVD-CHO and pertussis toxin. Electron microscopic analysis revealed that apoptosis occurred in ecdysone-treated cells. V642I-APP-induced death was suppressed by the anti-AD factors estrogen and apoE2. These data demonstrate not only that expression of this FAD gene causes neuronal apoptosis, but that F11/EcR/V642I cells, the first neuronal cells with inducible FAD gene expression, provide a useful model system in investigating AD disorders.
Collapse
Affiliation(s)
- T Niikura
- Department of Pharmacology and Neurosciences, KEIO University School of Medicine, Shinanomachi, Shinjuku-ku, Tokyo, 160, Japan
| | | | | | | | | | | | | | | | | |
Collapse
|
40
|
Horie Y, Kato S, Ohki E, Tamai H, Yamagishi Y, Ishii H. Hepatic microvascular dysfunction in endotoxemic rats after acute ethanol administration. Alcohol Clin Exp Res 2000; 24:691-8. [PMID: 10832911] [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: 02/16/2023]
Abstract
BACKGROUND A high concentration of ethanol is reported to cause hepatic microvascular dysfunction. However, little is known about the effect of ethanol on hepatic microcirculation in endotoxemic animals. The objective of this study was to determine whether endotoxemia enhances the hepatic microvascular dysfunction induced by acute ethanol administration. METHODS Intravital videomicroscopy was used to monitor leukocyte recruitment, number of nonperfused sinusoids, and flow velocity of erythrocytes (RBC) labeled with fluorescein isothiocyanate (FITC) in the livers of male Wistar rats that were administered ethanol (20%, 3 g/kg; or 40%, 6 g/kg) from a gastric tube. Flow velocity of RBC in sinusoids was measured with an off-line velocimeter. Plasma tumor necrosis factor (TNF)-alpha levels were also measured. In some experiments, rats were injected with 2 mg/kg of lipopolysaccharides (LPS) intraperitoneally at 16 hr before the experiments, and the same protocol was performed. RESULTS Although FITC-RBC velocity was initially increased by both 20% and 40% ethanol in control rats, it was reduced by only 40% ethanol at 60 min. In LPS-treated rats, the FITC-RBC velocity also was increased initially but was reduced at 60 and 30 min by 20% and 40% ethanol, respectively. Only 40% ethanol caused leukostasis in the pericentral region of control rats. In LPS-treated rats, however, leukostasis was noted in the midzonal and pericentral regions of liver after both 20% and 40% ethanol administration. Ethanol increased plasma TNF-alpha levels only in LPS-treated rats. CONCLUSIONS These results suggest that LPS synergistically enhances ethanol-induced hepatic microvascular dysfunction and liver injury, especially in the midzonal region via coagulation, which may be mediated by TNF-alpha.
Collapse
Affiliation(s)
- Y Horie
- Department of Internal Medicine, School of Medicine, Keio University, Tokyo, Japan
| | | | | | | | | | | |
Collapse
|
41
|
Yoshizawa T, Yamagishi Y, Koseki N, Goto J, Yoshida H, Shibasaki F, Shoji S, Kanazawa I. Cell cycle arrest enhances the in vitro cellular toxicity of the truncated Machado-Joseph disease gene product with an expanded polyglutamine stretch. Hum Mol Genet 2000; 9:69-78. [PMID: 10587580 DOI: 10.1093/hmg/9.1.69] [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: 11/14/2022] Open
Abstract
Machado-Joseph disease (MJD) is an inherited neurodegenerative disorder caused by the expansion of the polyglutamine stretch in the MJD gene-encoded protein, ataxin-3. Using a series of deletion constructs expressing ataxin-3 fragments with expanded polyglutamine stretches, we observed aggregate formation and cell death in cultured BHK-21 cells. The cytotoxic effect of N-terminal-truncated ataxin-3 with the expanded polyglutamine tract was enhanced under serum starvation culture, in which cells were arrested in the G(0)/G(1)phase. Coexpression of p21 (waf1/cip1/sdi1), a cyclin-Cdk inhibitor that induced cell cycle arrest in the G(1)phase, also increased the cell death susceptibility produced by the mutant ataxin-3 fragment in BHK-21 cells. The elevated susceptibility to cell death in the G(0)/G(1)phase was confirmed in nerve growth factor-treated, postmitotic neuronal PC12 cells compared with undifferentiated proliferating PC12 cells. These results strongly suggest that the cellular toxicity of truncated ataxin-3 with an expanded polyglutamine stretch is enhanced by cell cycle arrest in the G(0)/G(1)phase. Mutant ataxin-3 may confer a higher susceptibility to cell death on cells in the G(0)/G(1)phase.
Collapse
Affiliation(s)
- T Yoshizawa
- Department of Neurology, Institute of Clinical Medicine, University of Tsukuba, Tsukuba 305-8575, Japan.
| | | | | | | | | | | | | | | |
Collapse
|
42
|
Abstract
Restriction fragment length polymorphism (RFLP) of mitochondrial DNA (mtDNA) was examined in 32 isolates of Phialophora verrucosa (eight isolates from Japan, 10 from China, four from the USA, six from Venezuela and four from Colombia) and in three of Phialophora americana using five restriction enzymes. P. verrucosa isolates were divided into 10 mtDNA types based on RFLP patterns. Phylogeny constructed on sequence divergence of mtDNA indicated that P. verrucosa is a single species and isolates are clustered into three groups. Japan and the USA contained Group A and Group B isolates, China Group B isolates and South America Group B and Group C isolates. RFLP patterns of P. americana mtDNA were identical to those of Type 1 or Type 4 of P. verrucosa mtDNA, suggesting that both are identical. RFLP patterns of P. verrucosa were distinct from those of other dematiaceous fungi including Exophiala jeanselmei, E. moniliae, E. dermatitidis, E. spinifera, Cladophialophora (Cladosporium) carrionii, Fonsecaea pedrosoi, and Hortaea werneckii. These results indicate that RFLP analysis of mtDNA is a useful method for the identification, taxonomy, typing, epidemiology and phylogeny of P. verrucosa.
Collapse
Affiliation(s)
- Y Yamagishi
- Department of Dermatology, Kanazawa Medical University, Uchinada, Japan
| | | | | |
Collapse
|
43
|
Okazaki Y, Katsuta O, Yokoyama M, Wako Y, Yamagishi Y, Tsuchitani M. Gangliocytoma with immature neuronal cell elements in the pituitary of a rat. J Vet Med Sci 1997; 59:833-6. [PMID: 9342712 DOI: 10.1292/jvms.59.833] [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: 02/05/2023] Open
Abstract
A spontaneous pituitary gangliocytoma with abundant, immature neuronal cell elements was found incidentally in a 109-week-old female Fischer 344 rat. The pituitary parenchyma was largely occupied by a tumor nodule with necrotic and hemorrhagic foci and cyst. The tumor was composed of mature ganglion-like (M) cells, small immature ganglion (I) cells and transitional (T) cells, with a fibrillar matrix. The I and T cells were intermingled with the M cells or were arranged in compact clusters, in which the I cells formed perivascular rosette-like structures, sometimes with mitotic figures. Immunohistochemically, all types of tumor cells were positive for neuron-specific enolase, and only the M cells was positive for chromogranin A. This result may be correlated with the degree of cytodifferentiation.
Collapse
Affiliation(s)
- Y Okazaki
- Mitsubishi Chemical Safety Institute Ltd., Ibaraki, Japan
| | | | | | | | | | | |
Collapse
|
44
|
Tanaka H, Tanaka Y, Shinagawa K, Yamagishi Y, Ohtaki K, Asano K. Three types of recombinant human granulocyte colony-stimulating factor have equivalent biological activities in monkeys. Cytokine 1997; 9:360-9. [PMID: 9195136 DOI: 10.1006/cyto.1996.0177] [Citation(s) in RCA: 26] [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: 02/04/2023]
Abstract
Three types of rhG-CSF are commercially available (non-glycosylated: filgrastim, glycosylated: lenograstim and N-terminal mutated: nartograstim). It has been reported that higher in vitro or in vivo efficacy was found in glycosylated or N-terminal mutated rhG-CSF than in non-glycosylated rhG-CSF. We reported that glycosylated or N-terminal mutated rhG-CSF showed equal efficacy to non-glycosylated rhG-CSF in vivo. In this study, we carried out a direct comparison of pharmacokinetics and pharmacological effects of three rhG-CSFs. We used commercially obtained rhG-CSF products whose activities are guaranteed by the manufacturers. Monkeys have been selected as the experimental animals because of their close relationship to humans concerning drug disposition and daily doses were in accordance with the clinical use of rhG-CSFs. Normal cynomolgus monkeys were given 1.5 or 5 micrograms/kg of rhG-CSF either intravenously or subcutaneously for 5 consecutive days. After intravenous injection, the serum concentration-time profiles of nartograstim were almost identical to those of filgrastim at both doses but the concentrations after lenograstim administration decreased faster. Following subcutaneous administration, no marked differences were observed between the three rhG-CSFs, although lenograstim showed lower serum concentrations than both filgrastim and nartograstim. In spite of some small differences in the pharmacokinetics of the three rhG-CSFs, the pharmacodynamics were identical.
Collapse
Affiliation(s)
- H Tanaka
- Pharmaceutical Division, Kirin Brewery Co., Ltd, Tokyo, Japan
| | | | | | | | | | | |
Collapse
|
45
|
Taniyama M, Morita T, Yamagishi Y, Kato A, Bando C, Okawa N, Kaji A. Human lymphotoxin mutein lacks hypotensive activity but has higher in vivo antitumor activity than lymphotoxin or tumor necrosis factor. Proc Natl Acad Sci U S A 1997; 94:3324-9. [PMID: 9096392 PMCID: PMC20368 DOI: 10.1073/pnas.94.7.3324] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [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: 02/04/2023] Open
Abstract
A serious drawback of tumor necrosis factor alpha (TNF) as a clinical antitumor agent is that it also has hypotensive activity. To overcome this problem, derivatives of its sister cytokine lymphotoxin (TNF-beta or LT) were prepared. One of them, mutein 2 (Mut2) has a deletion of amino acids 1-7 but contains substituted amino acids, Met-Phe-Pro at positions 8-10 of the mature human LT. This mutein has no hypotensive activity at the maximum dose (10 mg/kg) tested on rats. In contrast, a much lower dose (1 mg/kg) of TNF and LT caused a significant blood pressure drop. In vivo studies revealed that Mut2 was more effective than TNF or LT against MethA (a mouse tumor line) as judged by the therapeutic ratio [calculated as LD50 (dose that kills 50% of the animals)/ED50 (dose that reduces the tumor size by 50%)]. With five other different mouse tumors and two different human tumors, Mut2 was also effective and the effectiveness was comparable or superior to that of TNF or LT. These results suggest the possibility that this derivative may be usable as a clinical antitumor agent without the serious side effects associated with TNF.
Collapse
Affiliation(s)
- M Taniyama
- Tsumura Central Research Institute, Tsumura and Company, Inashiki-gun, Ibaraki, Japan
| | | | | | | | | | | | | |
Collapse
|
46
|
Torii Y, Hitomi K, Yamagishi Y, Tsukagoshi N. Demonstration of alkaline phosphatase participation in the mineralization of osteoblasts by antisense RNA approach. Cell Biol Int 1996; 20:459-64. [PMID: 8931312 DOI: 10.1006/cbir.1996.0060] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.1] [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: 02/03/2023]
Abstract
MC3T3-E1 cells grown with ascorbic acid express sequentially osteoblastic marker proteins such as alkaline phosphatase (ALPase) and then form a mineralized extracellular matrix (ECM) as a consequence of osteoblastic differentiation. To explore the functional roles of ALPase in the process of osteoblastic maturation, an inducible expression vector for antisense ALPase RNA was constructed and stably transfected into MC3T3-E1 cells. The expression of antisense ALPase RNA in the differentiated MC3T3-E1 transfectants reduced markedly the ALPase activity, which resulted in a significant decrease in the deposition of minerals upon prolonged culture. These findings demonstrated directly that ALPase participated in the mineralization of ECM.
Collapse
Affiliation(s)
- Y Torii
- Department of Applied Biological Sciences, School of Agricultural Sciences, Nagoya University, Japan
| | | | | | | |
Collapse
|
47
|
Okazaki Y, Kurata Y, Makinodan F, Kidachi F, Yokoyama M, Wako Y, Yamagishi Y, Katsuta O, Takechi M, Tsuchitani M. Spontaneous lesions detected in the common cotton-eared marmosets (Callithrix jacchus). J Vet Med Sci 1996; 58:181-90. [PMID: 8777223 DOI: 10.1292/jvms.58.181] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.1] [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: 02/02/2023] Open
Abstract
Spontaneous lesions in the common cotton-eared marmosets (Callithrix jacchus), which were maintained in our laboratory or were purchased from a commercial breeder, were examined histopathologically. There were 39 males and 22 females, between the ages of 7 and 100 months. The most interesting finding noted was extramedullary hematopoiesis, which was observed in the mesenteric lymph nodes, spleen, liver, kidney, adrenal gland, and cerebral choroid plexus. Megakaryocytes were frequently observed in the blood vessels of the alveolar wall of the lung. It is important to distinguish extramedullary hematopoiesis which occurs accidentally from that induced by repeated blood sampling or that resulting from administration of chemicals. Extramedullary hematopoiesis was easily distinguishable from inflammation or hematopoietic neoplasms, because of the various cellular elements present, including megakaryocytes. In the weak and dead animals, enterocolitis was found at a high frequency. Other common findings included thymic involution, prominent vacuolation of liver sinusoidal cells, which were probably Ito-cells, and basophilic changes in the renal tubular epithelium. The liver and the kidney are frequently affected by toxic effects of chemicals. Therefore, it is important to distinguish the toxic changes from the spontaneous ones. Proliferation of apocrine glands in the cervical skin was an interesting finding; however, neither inflammatory change nor cellular atypia was noted in this structure. Although its function is unclear, this structure may be a marmoset-specific tissue.
Collapse
Affiliation(s)
- Y Okazaki
- Mitsubishi Chemical Safety Institute Ltd., Ibaraki, Japan
| | | | | | | | | | | | | | | | | | | |
Collapse
|
48
|
Xu G, Fujita J, Negayama K, Miyawaki H, Yamagishi Y, Hojo S, Takigawa K, Ohnishi T, Okada H, Yamaji Y, Kawanishi K, Takahara J. [Effect of clarithromycin on cytocidal activity against Pseudomonas aeruginosa in mice peritoneal cavity]. Kansenshogaku Zasshi 1996; 70:93-4. [PMID: 8822058 DOI: 10.11150/kansenshogakuzasshi1970.70.93] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
- G Xu
- First Department of Internal Medicine, Kagawa Medical School
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
49
|
Miyawaki H, Fujita J, Takigawa K, Negayama K, Yamagishi Y, Yamaji Y, Ouchi K, Nakazawa T, Kawanishi K, Takahara J. Investigation of nosocomial respiratory infection due to Pseudomonas cepacia by arbitrarily primed polymerase chain reaction. Diagn Microbiol Infect Dis 1995; 23:77-83. [PMID: 8849650 DOI: 10.1016/0732-8893(95)00176-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [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: 02/02/2023]
Abstract
We used DNA fingerprinting by the arbitrarily primed polymerase chain reaction (AP-PCR) technique for an epidemiologic investigation of Pseudomonas cepacia nosocomial isolates obtained from patients attending our hospital. This approach was compared with conventional phenotypic typing and pulsed-field gel electrophoresis (PFGE). The patterns of gel electrophoresis of the products of AP-PCR differed significantly according to differences in the concentration of Mg2+ and in pH. AP-PCR and PFGE was identical in their resolving power, as the two methods generated four different profiles and identified the same group of strains. The AP-PCR method constitutes an easy alternative to the well-established PFGE method.
Collapse
Affiliation(s)
- H Miyawaki
- First Department of Internal Medicine, Kagawa Medical School, Yamaguchi, Japan
| | | | | | | | | | | | | | | | | | | |
Collapse
|
50
|
Katsuta O, Yokoyama M, Okazaki Y, Wako Y, Yamagishi Y, Takechi M, Tsuchitani M. Intraocular leiomyosarcoma in a Fischer 344 rat. Contemp Top Lab Anim Sci 1995; 34:88-90. [PMID: 16457538] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Affiliation(s)
- O Katsuta
- Mitsubishi Chemical Safety Institute Ltd., Kashima-gun, Ibaraki-ken, Japan
| | | | | | | | | | | | | |
Collapse
|