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Ishikura M, Kobori A, Sasaki Y, Murai R, Okada T, Toyota T, Taniguchi T, Kim K, Ehara N, Kinoshita M, Furukawa Y. Importance of the relative epicardial connection locations and right-sided pulmonary vein isolation line for successful pulmonary vein isolation. J Cardiovasc Electrophysiol 2023; 34:841-848. [PMID: 36758950 DOI: 10.1111/jce.15855] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/17/2022] [Revised: 12/21/2022] [Accepted: 02/05/2023] [Indexed: 02/11/2023]
Abstract
INTRODUCTION The presence of an epicardial connection (EC) decreases the success rate of pulmonary vein isolation (PVI); however, the effect of designing isolation lines has not been evaluated. We sought to clarify the effects of designing an anterior line for right-sided PVI considering the presence and location of the EC. METHODS Seventy-four consecutive patients who underwent initial catheter ablation for atrial fibrillation were retrospectively included in this study. The presence of the EC was determined by the left atrial (LA) activation map during right atrial pacing, and patients were divided into EC-positive (n = 23, 31%) and EC-negative (n = 51, 69%) groups. EC-positive patients were further subdivided based on the EC location: on-the-line group, (EC on the PVI line, n = 11); inside-line group (EC on the pulmonary vein [PV] side, n = 10); and outside-line group (EC on the LA side, n = 2). The PVI parameters were compared among the three groups. RESULTS The success rates of the first-pass isolation were comparable between the EC-negative and EC-positive groups (70.6% vs. 60.9%, ns), but the success rate was significantly higher in the on-the-line group than in the inside-line group (91% vs. 20%, p = 0.002). First-pass isolation was successful in both patients in the outside-line group. Additional carina ablation was required only in the inside-line group. CONCLUSIONS The association between the EC site and the right-sided PV anterior isolation line affected the success rate of first-pass isolation. For successful right-sided PVI, it is important to consider the EC site when designing the PVI line.
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Affiliation(s)
- Masahiro Ishikura
- Department of Cardiology, Kobe City Medical Center General Hospital, Kobe, Japan
| | - Atsushi Kobori
- Department of Cardiology, Kobe City Medical Center General Hospital, Kobe, Japan
| | - Yasuhiro Sasaki
- Department of Cardiology, Kobe City Medical Center General Hospital, Kobe, Japan
| | - Ryosuke Murai
- Department of Cardiology, Kobe City Medical Center General Hospital, Kobe, Japan
| | - Taiji Okada
- Department of Cardiology, Kobe City Medical Center General Hospital, Kobe, Japan
| | - Toshiaki Toyota
- Department of Cardiology, Kobe City Medical Center General Hospital, Kobe, Japan
| | - Tomohiko Taniguchi
- Department of Cardiology, Kobe City Medical Center General Hospital, Kobe, Japan
| | - Kitae Kim
- Department of Cardiology, Kobe City Medical Center General Hospital, Kobe, Japan
| | - Natsuhiko Ehara
- Department of Cardiology, Kobe City Medical Center General Hospital, Kobe, Japan
| | - Makoto Kinoshita
- Department of Cardiology, Kobe City Medical Center General Hospital, Kobe, Japan
| | - Yutaka Furukawa
- Department of Cardiology, Kobe City Medical Center General Hospital, Kobe, Japan
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Sasaki Y, Kobori A, Ishikura M, Murai R, Okada T, Toyota T, Taniguchi T, Kim K, Ehara N, Kinoshita M, Furukawa Y. Effectiveness of a manual dragging laser irradiation technique using the first‐generation endoscopic laser balloon ablation system for pulmonary vein isolation. J Arrhythm 2022; 38:327-335. [PMID: 35785395 PMCID: PMC9237312 DOI: 10.1002/joa3.12711] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2022] [Revised: 03/14/2022] [Accepted: 03/28/2022] [Indexed: 11/29/2022] Open
Abstract
Background Although high efficacy of laser balloon (LB) ablation for atrial fibrillation (AF) has been shown, the conventional point‐by‐point technique requires a long procedure time. We investigated the clinical effectiveness of the manual dragging laser technique. Methods We enrolled 51 consecutive patients with paroxysmal AF who underwent pulmonary vein isolation (PVI) using first‐generation LB (LB1) at our institution. The first 25 patients underwent PVI using a point‐by‐point laser irradiation maneuver (point‐by‐point group). The latter 26 patients underwent PVI using a manually dragging laser irradiation maneuver (dragging group). The power and delivery time for the laser energy were selected from a preset protocol with 5.5–12 W and 20–30 s for each application. The dragging irradiation method was performed by manually rotating approximately 1.5°/s during one irradiation application. Results PVI was successful in all cases. The duration of PVI was shorter (66 ± 20 vs. 116 ± 39 min, p < 0.0001), and the number of laser irradiations for the 4PVs were significantly less in the dragging group. There were four recurrent cases (16%) in the point‐by‐point group and 1 (4%) in the dragging group. There was no significant difference in the survival rate free from recurrence after the blanking period between the two groups (log‐rank p = 0.1570). The complications were similar between the groups (4% vs. 4%, ns). Conclusions The manual dragging laser irradiation technique using LB1 could shorten the PVI procedure time while preserving clinical effectiveness.
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Affiliation(s)
- Yasuhiro Sasaki
- Department of Cardiology Kobe City Medical Center General Hospital Kobe Japan
| | - Atsushi Kobori
- Department of Cardiology Kobe City Medical Center General Hospital Kobe Japan
| | - Masahiro Ishikura
- Department of Cardiology Kobe City Medical Center General Hospital Kobe Japan
| | - Ryosuke Murai
- Department of Cardiology Kobe City Medical Center General Hospital Kobe Japan
| | - Taiji Okada
- Department of Cardiology Kobe City Medical Center General Hospital Kobe Japan
| | - Toshiaki Toyota
- Department of Cardiology Kobe City Medical Center General Hospital Kobe Japan
| | - Tomohiko Taniguchi
- Department of Cardiology Kobe City Medical Center General Hospital Kobe Japan
| | - Kitae Kim
- Department of Cardiology Kobe City Medical Center General Hospital Kobe Japan
| | - Natsuhiko Ehara
- Department of Cardiology Kobe City Medical Center General Hospital Kobe Japan
| | - Makoto Kinoshita
- Department of Cardiology Kobe City Medical Center General Hospital Kobe Japan
| | - Yutaka Furukawa
- Department of Cardiology Kobe City Medical Center General Hospital Kobe Japan
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Kobori A, Sasaki Y, Pak M, Ishikura M, Murai R, Okada T, Toyota T, Taniguchi T, Kim K, Ehara N, Kinoshita M, Kihara Y, Furukawa Y. Comparison of Cryoballoon and Contact Force-Sensing Radiofrequency Ablation for Persistent Atrial Fibrillation in Clinical Practice. Circ J 2021; 86:290-298. [PMID: 34565782 DOI: 10.1253/circj.cj-21-0608] [Citation(s) in RCA: 3] [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] [Indexed: 11/09/2022]
Abstract
BACKGROUND Outcomes of cryoballoon ablation for persistent atrial fibrillation (AF) are unclear, especially in Japanese patients, so the effectiveness and safety of cryoballoon ablation in clinical practice were retrospectively compared with those of contact force-sensing radiofrequency (CFRF) ablation including the high-power protocol.Methods and Results:Consecutive patients with persistent AF were reviewed, and 253 and 265 patients who underwent cryoballoon and CFRF ablation, respectively, were enrolled. The primary endpoint was atrial arrhythmia recurrence. The secondary endpoints were periprocedural complications and repeat ablation. The rate of additional left atrial (LA) ablation after pulmonary vein isolation (PVI) was similar between groups (68.8% cryoballoon vs. 74.0% CFRF, P=0.19). Freedom from atrial arrhythmia recurrence was comparable between groups over a follow-up of 25.5±12.5 months (72.3% cryoballoon vs. 69.8% CFRF; adjusted hazard ratio (HR) 0.85, 95% confidence interval (CI) 0.59-1.21, P=0.36). Outcomes were similar in the subgroups of PVI alone and PVI plus additional LA ablation. LA posterior wall isolation, absence of defragmentation, and low creatine clearance, but not catheter selection, were associated with the primary endpoint. Periprocedural complications (adjusted HR 0.73, 95% CI 0.34-1.54, P=0.41) and repeat ablation (adjusted HR 1.11, 95% CI 0.71-1.74, P=0.64) were similar for both procedures. CONCLUSIONS Cryoballoon ablation for persistent AF in Japanese clinical practice had acceptable outcomes comparable to those of advanced CFRF ablation.
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Affiliation(s)
- Atsushi Kobori
- Department of Cardiology, Kobe City Medical Center General Hospital
| | - Yasuhiro Sasaki
- Department of Cardiology, Kobe City Medical Center General Hospital
| | - Misun Pak
- Department of Cardiology, Kobe City Medical Center General Hospital
| | | | - Ryosuke Murai
- Department of Cardiology, Kobe City Medical Center General Hospital
| | - Taiji Okada
- Department of Cardiology, Kobe City Medical Center General Hospital
| | - Toshiaki Toyota
- Department of Cardiology, Kobe City Medical Center General Hospital
| | | | - Kitae Kim
- Department of Cardiology, Kobe City Medical Center General Hospital
| | - Natsuhiko Ehara
- Department of Cardiology, Kobe City Medical Center General Hospital
| | - Makoto Kinoshita
- Department of Cardiology, Kobe City Medical Center General Hospital
| | - Yasuki Kihara
- Department of Cardiology, Kobe City Medical Center General Hospital
| | - Yutaka Furukawa
- Department of Cardiology, Kobe City Medical Center General Hospital
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Ishiguchi H, Shimizu A, Ishikura M, Yoshida M, Imoto K, Sonoyama K, Kawabata T, Sugamori T, Ogawa M, Uchida T, Nakamura T, Morimoto T, Yasuda Y, Tanabe K, Yoshiga Y, Okamura T, Kobayashi S, Yano M, Oda T. Association Between Atrial High-Rate Episodes and Ischemic/Major Bleeding Events in Patients With a Cardiac Implantable Electronic Device - A 10-Year, Single-Center Historical Cohort Study. Circ J 2021; 85:1329-1337. [PMID: 33867407 DOI: 10.1253/circj.cj-20-1269] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [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] [Indexed: 11/09/2022]
Abstract
BACKGROUND An association between atrial high-rate episode (AHRE) and stroke has been reported, although data for the Asian population are limited. This study aimed to investigate the role of AHRE in ischemic and major bleeding events in patients who underwent a cardiac implantable electronic device (CIED) procedure.Methods and Results:This single-center historical cohort study included 710 patients (age: 78±11 years, 374 women) who underwent a CIED-related procedure between October 2009 and September 2019 at Shimane Prefectural Central Hospital (median follow-up period: 4.5 [2.5, 7] years, 3439 person-years). Based on the maximum AHRE burden, patients were divided into: (1) <6 min; (2) ≥6 min to 24-h; and (3) ≥24-h groups. The cumulative incidence of ischemic (ischemic stroke, systemic embolism, and transient ischemic attack) and major bleeding (≥3 Bleeding Academic Research Consortium bleeding criteria) events after the procedure were compared. Uni- and multivariate analyses were performed to identify factors associated with these events. The incidence of both events increased with the rising AHRE burden, being significantly higher in the ≥24-h group than in the <6 min group. Multivariate analysis found age ≥85 years to be the only independent factor associated with both events. CONCLUSIONS Longer AHRE duration is associated with a high number of major bleeding and ischemic events. Monitoring these bleeding risks is mandatory when clinicians are considering anticoagulation therapy for such patients.
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Affiliation(s)
| | | | | | - Masaaki Yoshida
- Division of Cardiology, Shimane Prefectural Central Hospital
| | - Koji Imoto
- Division of Cardiology, Shimane Prefectural Central Hospital
| | | | | | | | | | - Tomoyuki Uchida
- Department of Cardiology, National Hospital Organisation Hamada Medical Center
| | - Tsukasa Nakamura
- Department of Medical Education, Shimane Prefectural Central Hospital
| | - Takeshi Morimoto
- Department of Clinical Epidemiology Center for Clinical Research and Education, Hyogo College of Medicine
| | - Yu Yasuda
- Division of Cardiology, Faculty of Medicine, Shimane University
| | - Kazuaki Tanabe
- Division of Cardiology, Faculty of Medicine, Shimane University
| | - Yasuhiro Yoshiga
- Division of Cardiology, Department of Medicine and Clinical Science, Yamaguchi University Graduate School of Medicine
| | - Takayuki Okamura
- Division of Cardiology, Department of Medicine and Clinical Science, Yamaguchi University Graduate School of Medicine
| | - Shigeki Kobayashi
- Division of Cardiology, Department of Medicine and Clinical Science, Yamaguchi University Graduate School of Medicine
| | - Masafumi Yano
- Division of Cardiology, Department of Medicine and Clinical Science, Yamaguchi University Graduate School of Medicine
| | - Tsuyoshi Oda
- Division of Cardiology, Shimane Prefectural Central Hospital
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Ishikura M, Endo A, Koshino K, Kagawa Y, Tanabe K. Development of Alveolar Hemorrhage in a Patient with Acute Myocardial Infarction Complicated with Essential Thrombocythemia. Am J Case Rep 2021; 22:e928409. [PMID: 33558452 PMCID: PMC7883940 DOI: 10.12659/ajcr.928409] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Patient: Male, 75-year-old Final Diagnosis: Alveolar hemorrhage Symptoms: Hemoptysis Medication:— Clinical Procedure: — Specialty: Cardiology • Hematology
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Affiliation(s)
- Masahiro Ishikura
- Division of Cardiology, Shimane University Faculty of Medicine, Izumo, Shimane, Japan
| | - Akihiro Endo
- Division of Cardiology, Shimane University Faculty of Medicine, Izumo, Shimane, Japan
| | - Kaito Koshino
- Division of Cardiology, Shimane University Faculty of Medicine, Izumo, Shimane, Japan
| | - Yuzo Kagawa
- Division of Cardiology, Shimane University Faculty of Medicine, Izumo, Shimane, Japan
| | - Kazuaki Tanabe
- Division of Cardiology, Shimane University Faculty of Medicine, Izumo, Shimane, Japan
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Ishiguchi H, Yasuda Y, Ishikura M, Yoshida M, Imoto K, Sonoyama K, Kawabata T, Okamura T, Endo A, Kobayashi S, Tanabe K, Yano M, Oda T. Trends Over Time in the Incidences of ST-Segment Elevation Myocardial Infarction and Non-ST-Segment Elevation Myocardial Infarction During the Past Decade in a Rural Japanese High-Aged Population. Circ J 2021; 85:175-184. [DOI: 10.1253/circj.cj-20-0955] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [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: 11/09/2022]
Affiliation(s)
| | - Yu Yasuda
- Division of Cardiology, Faculty of Medicine, Shimane University
| | | | - Masaaki Yoshida
- Division of Cardiology, Shimane Prefectural Central Hospital
| | - Koji Imoto
- Division of Cardiology, Shimane Prefectural Central Hospital
| | | | | | - Takayuki Okamura
- Division of Cardiology, Department of Medicine and Clinical Science, Yamaguchi University Graduate School of Medicine
| | - Akihiro Endo
- Division of Cardiology, Faculty of Medicine, Shimane University
| | - Shigeki Kobayashi
- Division of Cardiology, Department of Medicine and Clinical Science, Yamaguchi University Graduate School of Medicine
| | - Kazuaki Tanabe
- Division of Cardiology, Faculty of Medicine, Shimane University
| | - Masafumi Yano
- Division of Cardiology, Department of Medicine and Clinical Science, Yamaguchi University Graduate School of Medicine
| | - Tsuyoshi Oda
- Division of Cardiology, Shimane Prefectural Central Hospital
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Yasuda Y, Ishiguchi H, Ishikura M, Yoshida M, Imoto K, Sonoyama K, Kawabata T, Okamura T, Endo A, Kobayashi S, Tanabe K, Yano M, Oda T. Incidence and Demographic Trends for Acute Coronary Syndrome in a Non-Epidemic Area During the Coronavirus Disease Pandemic in Japan - A 2-Institutional Observational Study. Circ Rep 2021; 3:95-99. [PMID: 33693295 PMCID: PMC7939951 DOI: 10.1253/circrep.cr-20-0141] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [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] [Indexed: 11/15/2022] Open
Abstract
Background:
We investigated the incidence of acute coronary syndrome (ACS) in a non-epidemic area of coronavirus disease-2019 (COVID-19) in Japan. Methods and Results:
This observational study included consecutive patients admitted for ACS at 2 tertiary hospitals in Izumo City during the pandemic in Japan (n=42, March–July 2020). Although the monthly ACS incidence was comparable, the proportions of delayed admissions and high Killip class (III/IV) were significantly higher in this population than in historical cohorts (n=197, 2015–2019). Conclusions:
Our findings stress the importance of encouraging patients with ACS-related symptoms to visit medical services promptly, especially in non-epidemic areas.
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Affiliation(s)
- Yu Yasuda
- Division of Cardiology, Shimane University Faculty of Medicine Izumo Japan
| | - Hironori Ishiguchi
- Division of Cardiology, Shimane Prefectural Central Hospital Izumo Japan
| | - Masahiro Ishikura
- Division of Cardiology, Shimane Prefectural Central Hospital Izumo Japan
| | - Masaaki Yoshida
- Division of Cardiology, Shimane Prefectural Central Hospital Izumo Japan
| | - Koji Imoto
- Division of Cardiology, Shimane Prefectural Central Hospital Izumo Japan
| | - Kazuhiko Sonoyama
- Division of Cardiology, Shimane Prefectural Central Hospital Izumo Japan
| | - Tetsuya Kawabata
- Division of Cardiology, Shimane Prefectural Central Hospital Izumo Japan
| | - Takayuki Okamura
- Division of Cardiology, Department of Medicine and Clinical Science, Yamaguchi University Graduate School of Medicine Ube Japan
| | - Akihiro Endo
- Division of Cardiology, Shimane University Faculty of Medicine Izumo Japan
| | - Shigeki Kobayashi
- Division of Cardiology, Department of Medicine and Clinical Science, Yamaguchi University Graduate School of Medicine Ube Japan
| | - Kazuaki Tanabe
- Division of Cardiology, Shimane University Faculty of Medicine Izumo Japan
| | - Masafumi Yano
- Division of Cardiology, Department of Medicine and Clinical Science, Yamaguchi University Graduate School of Medicine Ube Japan
| | - Tsuyoshi Oda
- Division of Cardiology, Shimane Prefectural Central Hospital Izumo Japan
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Ishikura M, Endo A, Sakamoto T, Tanabe J, Okazaki K, Ouchi T, Watanabe N, Tanabe K. Clarithromycin-induced Coronary Vasospasms Caused Acute Coronary Syndrome in a 19-year-old Male Patient. Intern Med 2021; 60:281-285. [PMID: 32963159 PMCID: PMC7872808 DOI: 10.2169/internalmedicine.5548-20] [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] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/08/2020] [Accepted: 08/05/2020] [Indexed: 11/06/2022] Open
Abstract
A 19-year-old-man was admitted to our hospital with intermittent chest pain. The day before admission, he had been diagnosed with enteritis and prescribed clarithromycin. He had experienced severe chest pain three times after taking clarithromycin; thus, acute coronary syndrome (ACS) was suspected. Emergent coronary angiography showed normal coronary arteries; however, the result of a subsequent acetylcholine provocation test was positive. We diagnosed him to have ACS caused by coronary vasospasms and suspected clarithromycin-induced Kounis syndrome. Although more common in older patients, Kounis syndrome must be suspected and a thorough medication history should be taken whenever a patient complains of chest pain.
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Affiliation(s)
- Masahiro Ishikura
- Division of Cardiology, Shimane University Faculty of Medicine, Japan
| | - Akihiro Endo
- Division of Cardiology, Shimane University Faculty of Medicine, Japan
| | - Takahiro Sakamoto
- Division of Cardiology, Shimane University Faculty of Medicine, Japan
| | - Junya Tanabe
- Division of Cardiology, Shimane University Faculty of Medicine, Japan
| | - Koichi Okazaki
- Division of Cardiology, Shimane University Faculty of Medicine, Japan
| | - Takeshi Ouchi
- Division of Cardiology, Shimane University Faculty of Medicine, Japan
| | - Nobuhide Watanabe
- Division of Cardiology, Shimane University Faculty of Medicine, Japan
| | - Kazuaki Tanabe
- Division of Cardiology, Shimane University Faculty of Medicine, Japan
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Ishiguchi H, Yoshida M, Ishikura M, Kawabata T, Oda T. Successful ablation of biatrial tachycardia with preserved electrical activation of left atrial appendage by unidirectional connection via Bachmann’s bundle: A case report. Indian Pacing Electrophysiol J 2020; 20:166-169. [PMID: 32305464 PMCID: PMC7384361 DOI: 10.1016/j.ipej.2020.04.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 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: 09/08/2019] [Revised: 02/11/2020] [Accepted: 04/07/2020] [Indexed: 11/14/2022] Open
Abstract
A 57-year-old man underwent his seventh ablation session for atrial tachycardia (AT). His previous ablations involved several regions of the right atrium (RA) and left atrium (LA). The AT was characterized as biatrial tachycardia with a circuit involving the mitral annulus and septal RA. The AT was terminated by ablation through the insertion site of Bachmann’s bundle (BB) in both atria. After 3 months, the patient underwent his eighth ablation session because of AT recurrence. Activation maps showed that the connection from the RA to LA and vice versa was maintained via BB and the coronary sinus, respectively. The ablation target to interrupt the AT circuit was the mitral isthmus (MI), not BB, because BB supplied the electrical activation of the left atrial appendage (LAA) via a unidirectional electrical connection from the RA to LA. Ablation attempts from within the coronary sinus were performed to target the epicardial connection in the MI and led to complete blockage of the connection from the LA to RA. Otherwise, the connection from the RA to LA was preserved via BB. The patient was free of symptoms and anti-arrhythmic drugs at the 4-month follow-up. However, he had a high risk of electrical isolation of the LAA because extensive ablations had been performed; the strategy of targeting the MI contributed to the balance between preserving the electrical activation of the LAA and treating the biatrial tachycardia. Verification of the connective pathway between the two atria might be helpful to determine the optimal target.
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10
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Ishiguchi H, Ishikura M, Yoshida M, Imoto K, Sonoyama K, Kawabata T, Ishihara Y, Yoshiga Y, Shimizu A, Oda T. Incidence and risk factors for cardiac implantable electronic device infection in current clinical settings in a Japanese population: A 20-year single-center observational study. J Cardiol 2020; 76:115-122. [DOI: 10.1016/j.jjcc.2020.01.006] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/29/2019] [Revised: 12/12/2019] [Accepted: 01/04/2020] [Indexed: 10/25/2022]
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Matsuura K, Ishikura M, Yoshida H, Nakayama T, Hasegawa S, Ando S, Horie H, Miyamura T, Kitamura T. Assessment of poliovirus eradication in Japan: genomic analysis of polioviruses isolated from river water and sewage in toyama prefecture. Appl Environ Microbiol 2000; 66:5087-91. [PMID: 11055968 PMCID: PMC92424 DOI: 10.1128/aem.66.11.5087-5091.2000] [Citation(s) in RCA: 33] [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: 11/20/2022] Open
Abstract
Seventy-eight poliovirus strains isolated from river water and sewage in Toyama Prefecture, Japan, during 1993 to 1995 were characterized by the PCR-restriction fragment length polymorphism (RFLP) method and by partially sequencing the VP3 and VP1 regions of the viral genome. Of these isolates, 36 were identified as Sabin vaccine strains, and 42 were identified as vaccine variant strains that had less than 1.4% nucleotide divergence from the Sabin strains, including 7 isolates with patterns different from those of Sabin strains as determined by PCR-RFLP analysis. These findings suggest that wild-type poliovirus was not circulating in Toyama Prefecture.
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Affiliation(s)
- K Matsuura
- Department of Virology, Toyama Institute of Health, Toyama 939-0363, Tokyo, Japan.
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Abstract
A carbocyclic cyclopropane fused nucleoside, 9-(c-4-hydroxymethylbicyclo[3.1.0]hex-r-2-yl)-9H-adenine, has been efficiently synthesized from 2-azabicyclo-[2.2.1]hex-5-en-3-one (ABH) in 6 steps, namely cyclopropanation, -reductive amide cleavage (RAC) reaction and adenine ring construction.
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Affiliation(s)
- Y Yamatoya
- Faculty of Pharmaceutical Sciences, Health Sciences University of Hokkaido, Ishikari-Tobetsu, Japan
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Abstract
The aim of this research was to analyze the phylogenetic relationships of zooxanthellate bivalves belonging to the genera Tridacna, Hippopus, Fragum, and Corculum as well as to the closely related azooxanthellate bivalves belonging to Vasticardium and Fulvia. The small-subunit ribosomal RNA genes (18S rDNAs) from these bivalves were amplified by polymerase chain reaction with universal eukaryotic primers and were then sequenced. The sequence data from each species were analyzed by the neighbor-joining, maximum parsimony, and maximum likelihood methods, and phylogenetic trees were constructed. The results were essentially consistent with the morphological taxonomy of these bivalves. Thus, the zooxanthellate clams branch into two lineages, one composed of the genera Fragum and Corculum in the family Cardiidae, and the other composed of the genera Tridacna and Hippopus in the family Tridacnidae. However, present results indicate that the azooxanthellate clams analyzed (Vasticardium flavum and Fulvia mutica) are more likely to form a clade with the species of Tridacna and Hippopus than with those of Fragum and Corculum. This topology suggests that either the symbiosis with zooxanthellae occurred independently in each of two lineages, Tridacna-Hippopus and Corculum-Fragum, or the symbiosis was established in clams ancestral to the lineages of both the zooxanthellate clams and the azooxanthellate clams Vasticardium and Fulvia, and the latter lost the symbiotic relationship after the symbiotic clam lineages had diverged.
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Affiliation(s)
- T Maruyama
- Marine Biotechnology Institute, Kamaishi Laboratories, Iwate, Japan.
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Yoshida T, Furuya N, Ishikura M, Isobe T, Haino-Fukushima K, Ogawa T, Komano T. Purification and characterization of thin pili of IncI1 plasmids ColIb-P9 and R64: formation of PilV-specific cell aggregates by type IV pili. J Bacteriol 1998; 180:2842-8. [PMID: 9603870 PMCID: PMC107247 DOI: 10.1128/jb.180.11.2842-2848.1998] [Citation(s) in RCA: 53] [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] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Thin pili of the closely related IncI1 plasmids ColIb-P9 and R64 are required only for liquid mating and belong to the type IV family of pili. They were sedimented by ultracentrifugation from culture medium in which Escherichia coli cells harboring ColIb-P9- or R64-derived plasmids had been grown, and then the pili were purified by CsCl density gradient centrifugation. In negatively stained thin pilus samples, long rods with a diameter of 6 nm, characteristic of type IV pili, were observed under an electron microscope. Gel electrophoretic analysis of purified ColIb-P9 thin pili indicated that thin pili consist of two kinds of proteins, pilin and the PilV protein. Pilin was demonstrated to be the product of the pilS gene. Pilin was first synthesized as a 22-kDa prepilin from the pilS gene and subsequently processed to a 19-kDa protein by the function of the pilU product. The N-terminal amino group of the processed protein was shown to be modified. The C-terminal segments of the pilV products vary among six or seven different types, as a result of shufflon DNA rearrangements of the pilV gene. These PilV proteins were revealed to comprise a minor component of thin pili. Formation of PilV-specific cell aggregates by ColIb-P9 and R64 thin pili was demonstrated and may play an important role in liquid mating.
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Affiliation(s)
- T Yoshida
- Department of Biology, Tokyo Metropolitan University, Minamiohsawa, Hachioji, Tokyo 192-0397, Japan
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Abstract
The morula-like cell, a hemocyte packed with many large (about 3 microns in diameter) electron-dense granules, is found only in the hemolymph of giant clams belonging to the Tridacnidae. To clarify the function of the morula-like cell, we investigated its proteins, especially those found in the large granules. Proteins with molecular weights of 64 kDa, 17 kDa and 7.4 kDa were found to be specific to this type of hemocyte. N-terminal amino acid sequence analysis revealed that the 17-kDa and 7.4-kDa proteins were novel proteins rich in aromatic amino acids. Rabbit polyclonal antibody against a synthetic peptide of the 7.4-kDa protein reacted not only with that protein but also with a larger molecular weight (about 16-kDa) protein in the morula-like cell. Examination of the N-terminal amino acid sequences showed that the 16-kDa protein is distinct from the 17-kDa protein, and Western blot analysis suggested that it is a precursor of the 7.4-kDa protein. The zooxanthellate portion of clam mantle and kidney contained proteins immunoreactive to the antibody, but the azooxanthellate portion of the mantle did not contain any immunoreactive protein. These results suggest that the morula-like cells interact with the zooxanthellae.
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Affiliation(s)
- K Nakayama
- Marine Biotechnology Institute, Shimizu Laboratories, Japan
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Nojima T, Nakamura F, Ishikura M, Inoue K, Nagashima K, Kato H. Pleomorphic carcinoma of the pancreas with osteoclast-like giant cells. Int J Pancreatol 1993; 14:275-81. [PMID: 8113629 DOI: 10.1007/bf02784937] [Citation(s) in RCA: 15] [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] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
We studied two cases of pleomorphic carcinoma of the pancreas with osteoclast-like giant cells. The cut surface of both tumors was firm and whitish-tan in color, with extensive hemorrhage and necrosis. Microscopically, these tumors were composed mainly of pleomorphic mononuclear cells and numerous bizarre giant cells, with a spindle-cell sarcomatoid appearance and adenocarcinomatous elements exhibiting varying degrees of differentiation. Multinucleated giant cells resembling osteoclasts were frequently located around sites of necrotic hemorrhage. Immunohistochemically, most tumor cells of sarcomatous areas and some anaplastic giant cells were positive for vimentin and cytokeratin. Both carcinoembryonic antigen and CA 19-9 were detected in tumor cells in one case, forming ducts or glands. These findings suggest that the tumors in these two cases originated from pancreatic-duct cells with mesenchymal differentiation. In contrast, osteoclast-like giant cells in both cases showed strong immunoreactivity with vimentin and with KP1 and PG-M1 (CD68), which are monoclonal antibodies that react with a histiocyte-macrophage-associated antigen; however, there was no reaction with any epithelial markers. Thus, osteoclast-like giant cells are not epithelial in nature, suggesting that their origin of histiocyte-macrophage lineage is possibly induced as a paraneoplastic product.
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Affiliation(s)
- T Nojima
- Department of Pathology, Hokkaido University School of Medicine, Sapporo, Japan
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Matsuura K, Ishikura M, Nakayama T, Hasegawa S, Morita O, Katori K, Uetake H. Ecological studies on reovirus pollution of rivers in Toyama Prefecture. II. Molecular epidemiological study of reoviruses isolated from river water. Microbiol Immunol 1993; 37:305-10. [PMID: 8394499 DOI: 10.1111/j.1348-0421.1993.tb03214.x] [Citation(s) in RCA: 16] [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] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
In order to clarify the source of reovirus pollution in river water, comparative surveys have been carried out between reovirus isolates from river water and those from sewage, human or animal, by making use of the analysis of genomic RNA-migration pattern of reovirus in polyacrylamide gel electrophoresis (electropherotype). The strains of reovirus serotype 1 and 2 isolated from river water were classified into 3 and 9 electropherotypes, respectively, and 8 out of these 12 types were also found among strains isolated from sewage or human. When the monthly distribution of the river isolates classified by electropherotypes was compared with that of the sewage isolates, there were cases in which strains of the same electropherotype were simultaneously isolated from both sources. The electropherotypes of 3 isolates from pig and field rodents were different from those of the other isolates. The electropherotype of an oyster isolate coincided with that of some of the isolates from humans and river water. These results indicate that the major source of reoviruses polluting river water may be the human excretion.
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Ishikura M, Watanabe M, Nakayama T, Matsuura K, Morita O, Uchida T. Seroepidemiology of spotted fever group rickettsiae in small field rodents in Japan. Microbiol Immunol 1992; 36:649-53. [PMID: 1522815 DOI: 10.1111/j.1348-0421.1992.tb02066.x] [Citation(s) in RCA: 4] [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: 12/27/2022]
Abstract
To clarify the geographic distribution of spotted fever group (SFG) rickettsiae in Japan, small field rodents captured in endemic and nonendemic areas were screened for anti-SFG rickettsia antibodies by the immunofluorescence test. Among total 716 specimens tested, 73-75% of rodents were antibody-positive against Rickettsia japonica and/or Rickettsia montana, showing different degree of antibody-positive proportions among each species of the rodents. Interestingly, these profiles were not different in the rodents from each endemic and nonendemic areas, indicating that the SFG rickettsiae are prevailing in the wider areas where patients have not been found yet.
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Terashima S, Shimizu M, Nakayama H, Ishikura M, Ueda Y, Imai K, Suzui A, Morita N. Studies on aldose reductase inhibitors from medicinal plant of "sinfito," Potentilla candicans, and further synthesis of their related compounds. Chem Pharm Bull (Tokyo) 1990; 38:2733-6. [PMID: 2127556 DOI: 10.1248/cpb.38.2733] [Citation(s) in RCA: 28] [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: 12/30/2022]
Abstract
For several years we have screened natural products having aldose reductase (AR) inhibitory activity. 3,3',4-Tri-O-methylellagic acid 4'-sulfate potassium salt (2) was isolated from a Mexican herb "Sinfito" (Potentilla candicans) as a potent AR inhibitory active constituent. 2 was more potent (IC50 = 8.0 x 10(-8)M) than ellagic acid, which is one of the natural inhibitors of AR. So we examined the synthesis of ellagic acid derivatives and found that the sulfate group is one of the important function.
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Kojima H, Nojima T, Nagashima K, Ono Y, Kudo M, Ishikura M. Diabetes insipidus caused by lymphocytic infundibuloneurohypophysitis. Arch Pathol Lab Med 1989; 113:1399-401. [PMID: 2589955] [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: 01/01/2023]
Abstract
Pathologic examination at autopsy of a 74-year-old man with central diabetes insipidus revealed that he had a chronic lymphocytic inflammation limited to the infundibulum, stalk, and posterior lobe of the pituitary gland. No meningitis, sarcoidosis, or granulomas were detected, though there was evidence of chronic pancreatitis. In addition, neuronal loss with gliosis was observed bilaterally in the supraoptic and paraventricular nuclei. The unusual localized inflammatory brain lesion was considered to be responsible for the diabetes insipidus.
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Affiliation(s)
- H Kojima
- Department of Pathology, Hokkaido University School of Medicine, Sapporo, Japan
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Abstract
Reoviruses (reos) were isolated from river water in various areas of Toyama Prefecture. The frequency of reo isolation was higher in the river water, the basin of which has a larger human population. The degree of river contamination with reo paralleled that with the Escherichia coli group of organisms, and reos were frequently isolated from sewage, too. The high antibody-positive (greater than or equal to 1:8 or greater than or equal to 1:10) rates against reos in humans and other animals tested (swine, cattle, and field rodents) indicated their wide-spread infection with reos. These results suggested that the major source of reos present in the river water may be the excretion by humans and other animals, especially the former. Survival experiments in which reos were added into the filtered or centrifuged river water and kept at various temperatures, revealed that reos survived for more than 3 years at 5 C. In the field experiment where reos suspended in cellophane tubes were kept in an agricultural water stream in winter (water temperatures below 10 C), they survived for 6 months until the water temperature rose above 20 C in summer.
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Ishikura M, Watanabe M, Matsuura K, Nakayama T, Morita O, Uetake H, Sakurada N. Epidemiological studies on the background of the endemic occurrence of tsutsugamushi disease in Toyama Prefecture. II. Anti-Rickettsia tsutsugamushi antibody-positive rate in inhabitants of endemic and nonendemic areas. Microbiol Immunol 1987; 31:985-99. [PMID: 3123897 DOI: 10.1111/j.1348-0421.1987.tb01331.x] [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: 01/04/2023]
Abstract
With a view to clarifying the actual state of inapparent infection of tsutsugamushi diseases, inhibitants of endemic and nonendemic areas were screened for anti-Rickettsia tsutsugamushi antibody (anti-Rt antibody) by the indirect immunofluorescence test. The anti-Rt antibody-positive rate in the inhabitants of the endemic area (about 50%) was statistically significantly higher than that in the nonendemic area (14.7%). The antibody titer in the inhabitants of the endemic area was 10-160, and the number of inhibitants showing a high antibody titer was 2-4 times larger than that of the nonendemic area. A total of 257 volunteers in the endemic area were analyzed for the changes in anti-Rt antibody titer over 1.5-2 years on an individual basis. An increase in the antibody titer was found in 20 inhabitants. There was no difference in the anti-Rt antibody-positive rate between male and female in either the endemic or the nonendemic area. The positive rate was also compared as to the distribution by 10 years of age. In the endemic area, there were no significant differences in the positive rate between any pair of 10-year age groups from 30s to 60s, whereas in the nonendemic area, the positive rate in the teen-age group was significantly lower than those in the age groups of 20 years or older. In Yamada district, the numbers of serum samples obtained from each age group were about the same, and the distribution of the positive rates showed a normal distribution. The nurse students having their homes in Toyama Prefecture were plotted on the map as for their anti-Rt antibody and geographical distribution. The results showed that many of them having homes in the endemic area were positive for the antibody, while some antibody-positives were scattered all over Toyama Prefecture.
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Ishikura M, Watanabe M, Morita O, Uetake H. Epidemiological studies on the background of the endemic occurrence of tsutsugamushi disease in Toyama Prefecture. I. Epidemiology of infection with Rickettsia tsutsugamuchi among field rodents in endemic and nonendemic areas. Microbiol Immunol 1985; 29:859-72. [PMID: 3934506 DOI: 10.1111/j.1348-0421.1985.tb00888.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
In order to clarify the epidemiological background of the endemic occurrence of tsutsugamushi disease in Toyama Prefecture, Japan, since 1978, comparative surveys have been carried out between endemic and nonendemic areas. Rickettsia tsutsugamushi (Rt) was isolated at a rate of about 36% (158/439) from field rodents in the endemic area while it was not isolated from any of 280 in nonendemic areas. In all of six stations in the endemic area, a significantly high proportion of rodents were found to be Rt carriers. However, no Rt was isolated from rodents captured from July to September. The organism was isolated from rodents captured in the other months, especially in a high proportion in November when infestation of rodents with Leptotrombidium pallidum was at its peak. When the rodents were examined by indirect immunofluorescence staining, the rate of anti-Rt antibody-positive animals was about 55% (157/287) and about 17% (62/368) in endemic and nonendemic areas, respectively. Larvae of mites collected from the rodents were found to belong to four genera and 11 species. Among them L. pallidum was the only mite that had been known to be a vector of Rt. L. pallidum was found most frequently and in abundance from rodents in the endemic area, whereas it was present in very small numbers in rodents in nonendemic areas. The infestation of rodents with L. pallidum showed a seasonal variation, i.e. two peaks per year, in spring and autumn, and the number of mites detected was markedly greater in November than in spring. Rt was isolated from L. pallidum on rodents captured in the endemic area.
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Mori M, Purvaneckas GE, Ishikura M, Ban Y. New synthesis of pyrrolo-1,4-benzodiazepines by utilizing palladium-catalyzed carbonylation. Chem Pharm Bull (Tokyo) 1984; 32:3840-7. [PMID: 6529791 DOI: 10.1248/cpb.32.3840] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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26
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Azumi N, Shibuya H, Ishikura M. Primary prostatic carcinoid tumor with intracytoplasmic prostatic acid phosphatase and prostate-specific antigen. Am J Surg Pathol 1984; 8:545-50. [PMID: 6204547 DOI: 10.1097/00000478-198407000-00007] [Citation(s) in RCA: 47] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
A case of prostatic carcinoid tumor with lymph node metastases is reported. The patient was a 78-year-old male who died in ventricular fibrillation. At autopsy, a 2 X 2 cm, white, irregular tumor was found in the prostate and there were several enlarged para-aortic lymph nodes. Both specimens contained a characteristic carcinoid tumor. Argyrophil stains revealed strong positivity in the primary as well as in the metastatic tumors. Electron micrographs prepared from formalin-fixed tissue demonstrated numerous membrane-bound dense-core granules. Immunoperoxidase-labeled antibodies against both prostatic acid phosphatase and prostate-specific antigen localized in the tumor cells. The ultrastructural and immunohistochemical results support differentiation of the tumor cells toward both prostatic epithelial cells and endocrine cells. We believe that this is the first reported case of a prostatic carcinoid tumor in which specific prostatic tissue markers have been demonstrated in the tumor cells.
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Shimoyama R, Uehara S, Itagaki Y, Izumiyama S, Hirayama A, Sato T, Ishikura M. [Presence of big plasma glucagon in a woman with porphyria]. Nihon Naika Gakkai Zasshi 1983; 72:611-7. [PMID: 6644144] [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: 01/21/2023]
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28
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Ishikura M. Speech audiometry in the post operative hearing loss. Rev Laryngol Otol Rhinol (Bord) 1981; 102:105-6. [PMID: 7255999] [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: 01/24/2023]
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29
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Ishikura M, Kodama H, Kubota K. [Colicin production by Shigella sonnei. 3. Immuno-serological relationship among various types of colicin]. Nihon Saikingaku Zasshi 1971; 26:543-52. [PMID: 5003679] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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30
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Gyobu Y, Yamazaki S, Ishikura M. [Experimental studies on the contamination of eggs with Arizona. 2. Oral administration of the organisms to chicks and hens]. Nihon Saikingaku Zasshi 1971; 26:294-7. [PMID: 5107265 DOI: 10.3412/jsb.26.294] [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: 01/13/2023]
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31
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Gyobu Y, Yamazaki S, Ishikura M. [Experimental studies on the contamination of eggs with Arizona. 1. Penetration through the egg shell and multiplication of the organisms in egg contents]. Nihon Saikingaku Zasshi 1971; 26:288-93. [PMID: 4938631] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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32
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Ishikura M, Kawai K, Terada Y, Taguchi K, Hirayama Y. [Immunological studies of the palatine tonsil--with special reference to serum immunoglobulins and complement]. Nihon Jibiinkoka Gakkai Kaiho 1970; 73:Suppl:1162-3. [PMID: 4196081] [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: 01/09/2023]
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33
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Kodama H, Ishikura M, Kubota K. [Purification of the skin reactive substance from Tabanus iyoensis Shiraki]. Igaku To Seibutsugaku 1970; 80:125-9. [PMID: 5461924] [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: 01/15/2023]
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34
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Kubota K, Ishikura M, Wada E, Gyobu Y. [Colicin production by Shigella sonnei. I. Basic requirements for production of colicin]. Nihon Saikingaku Zasshi 1969; 24:631-7. [PMID: 4904116] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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35
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Ishikura M, Kodama H, Gyobu Y, Kubota K. [Colicin production by Shigella sonnei. II. Re-evaluation of the Abbott and Shannon method by quantitation]. Nihon Saikingaku Zasshi 1969; 24:638-43. [PMID: 4904117] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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36
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Kunishige N, Ishikura M, Hashimoto K, Fujii K. [Experimental study of bleomycin concentration in the controlled tissue by intraarterial injection. l]. Nihon Jibiinkoka Gakkai Kaiho 1969; 72:456-7. [PMID: 5388813] [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: 01/15/2023]
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