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Hasegawa T, Kawakita A, Ueda N, Funahara R, Tachibana A, Kobayashi M, Kondou E, Takeda D, Kojima Y, Sato S, Yanamoto S, Komatsubara H, Umeda M, Kirita T, Kurita H, Shibuya Y, Komori T. Correction to: A multicenter retrospective study of the risk factors associated with medication-related osteonecrosis of the jaw after tooth extraction in patients receiving oral bisphosphonate therapy: can primary wound closure and a drug holiday really prevent MRONJ? Osteoporos Int 2023; 34:1141-1144. [PMID: 37052624 DOI: 10.1007/s00198-023-06745-3] [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: 04/14/2023]
Affiliation(s)
- T Hasegawa
- Department of Oral and Maxillofacial Surgery, Kobe University Graduate School of Medicine, 7-5-1, Kusunoki-Cho, Chuo-Ku, Kobe, 650-0017, Japan.
| | - A Kawakita
- Department of Clinical Oral Oncology, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - N Ueda
- Department of Oral and Maxillofacial Surgery, Nara Medical University, Nara, Japan
| | - R Funahara
- Department of Oral and Maxillofacial Surgery, Kobe University Graduate School of Medicine, 7-5-1, Kusunoki-Cho, Chuo-Ku, Kobe, 650-0017, Japan
| | - A Tachibana
- Department of Oral and Maxillofacial Surgery, Kakogawa Central City Hospital, Kakogawa, Japan
| | - M Kobayashi
- Department of Oral and Maxillofacial Surgery, Shin-Suma General Hospital, Kobe, Japan
| | - E Kondou
- Department of Dentistry and Oral Surgery, Shinshu University School of Medicine, Matsumoto, Japan
| | - D Takeda
- Department of Oral and Maxillofacial Surgery, Kobe Central Hospital, Kobe, Japan
| | - Y Kojima
- Department of Dentistry and Oral Surgery, Kansai Medical University, Hirakata, Japan
| | - S Sato
- Department of Oral Maxillofacial Surgery, Nagoya City University Graduate School of Medical Sciences, Nagoya, Japan
| | - S Yanamoto
- Department of Clinical Oral Oncology, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - H Komatsubara
- Department of Oral and Maxillofacial Surgery, Kobe Central Hospital, Kobe, Japan
| | - M Umeda
- Department of Clinical Oral Oncology, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - T Kirita
- Department of Oral and Maxillofacial Surgery, Nara Medical University, Nara, Japan
| | - H Kurita
- Department of Dentistry and Oral Surgery, Shinshu University School of Medicine, Matsumoto, Japan
| | - Y Shibuya
- Department of Oral Maxillofacial Surgery, Nagoya City University Graduate School of Medical Sciences, Nagoya, Japan
| | - T Komori
- Department of Oral and Maxillofacial Surgery, Kobe University Graduate School of Medicine, 7-5-1, Kusunoki-Cho, Chuo-Ku, Kobe, 650-0017, Japan
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Okimura T, Jiang Z, Komatsubara H, Hirasaka K, Oda T. Therapeutic effects of an orally administered edible seaweed-derived polysaccharide preparation, ascophyllan HS, on a Streptococcus pneumoniae infection mouse model. Int J Biol Macromol 2020; 154:1116-1122. [PMID: 31712141 DOI: 10.1016/j.ijbiomac.2019.11.053] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2019] [Revised: 10/19/2019] [Accepted: 11/07/2019] [Indexed: 12/19/2022]
Abstract
Ascophyllan HS is a commercially available preparation of the edible brown alga Ascophyllum nodosum containing ascophyllan, a sulfated polysaccharide with diverse beneficial biological activities. In this study, the effects of ascophyllan HS were evaluated in a severe intranasal Streptococcus pneumoniae infection mouse model. The control untreated mice started to die on day 7 and 80% had died by day 14 post-infection. Continuous oral administration of ascophyllan HS before and after bacterial infection resulted in a remarkable increase in survival rate, with 90% of the low (167 mg/kg body weight/day) and 100% of the high (500 mg/kg body weight/day) dose ascophyllan HS-treated mice surviving at day 14 post-infection. Histopathological observation of the lungs of the infected mice revealed the induction of typical pneumonia features in the alveolar spaces of the untreated control mice, such as extensive infiltration of inflammatory cells, edema, and fibrin deposition. In contrast, notable levels of lung injuries or alterations were not observed in the ascophyllan HS-treated mice, and only a minor lesion was observed in one mouse. Furthermore, bacterial burdens in the lungs were significantly reduced in the ascophyllan HS-treated mice as compared to the control mice at day 4 post-infection. Significantly higher levels of IL-12 were detected in the serum of ascophyllan HS-treated mice than that of control mice measured at the end of the infection experiment (day 14). These results suggest that orally administered ascophyllan HS exerts a therapeutic effect on S. pneumoniae infection by activating the host defense systems. This is the first report of the therapeutic effect of an orally administered seaweed polysaccharide preparation on S. pneumoniae infection. Our findings suggest that ascophyllan HS has the potential to be developed as nutraceuticals and pharmaceuticals applicable for humans as well as a safe and promising therapeutic agent against S. pneumoniae infection.
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Affiliation(s)
- Takasi Okimura
- Research and Development Division, Hayashikane Sangyo Co., Ltd., Shimonoseki, Yamaguchi 750-8608, Japan
| | - Zedong Jiang
- College of Food and Biological Engineering, Jimei University, Xiamen, Fujian 361021, China
| | | | - Katsuya Hirasaka
- Organization for Marine Science and Technology, Nagasaki University, Nagasaki 852-8521, Japan
| | - Tatsuya Oda
- Graduate School of Fisheries Science and Environmental Studies, Nagasaki University, Nagasaki 852-8521, Japan.
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Hasegawa T, Kawakita A, Ueda N, Funahara R, Tachibana A, Kobayashi M, Kondou E, Takeda D, Kojima Y, Sato S, Yanamoto S, Komatsubara H, Umeda M, Kirita T, Kurita H, Shibuya Y, Komori T. A multicenter retrospective study of the risk factors associated with medication-related osteonecrosis of the jaw after tooth extraction in patients receiving oral bisphosphonate therapy: can primary wound closure and a drug holiday really prevent MRONJ? Osteoporos Int 2017; 28:2465-2473. [PMID: 28451732 DOI: 10.1007/s00198-017-4063-7] [Citation(s) in RCA: 84] [Impact Index Per Article: 12.0] [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: 12/13/2016] [Accepted: 04/18/2017] [Indexed: 11/25/2022]
Abstract
UNLABELLED Root amputation, extraction of a single tooth, bone loss or severe tooth mobility, and an unclosed wound were significantly associated with increased risk of developing medication-related osteonecrosis of the jaw (MRONJ). We recommend a minimally traumatic extraction technique, removal of any bone edges, and mucosal wound closure as standard procedures in patients receiving bisphosphonates. INTRODUCTION Osteonecrosis of the jaws can occur following tooth extraction in patients receiving bisphosphonate drugs. Various strategies for minimizing the risk of MRONJ have been advanced, but no studies have comprehensively analyzed the efficacy of factors such as primary wound closure, demographics, and drug holidays in reducing its incidence. The purpose of this study was to retrospectively investigate the relationships between these various risk factors after tooth extraction in patients receiving oral bisphosphonate therapy. METHODS Risk factors for MRONJ after tooth extraction were evaluated using univariate and multivariate analysis. All patients were investigated with regard to demographics; type and duration of oral bisphosphonate use; whether they underwent a discontinuation of oral bisphosphonates before tooth extraction (drug holiday), and the duration of such discontinuation; and whether any additional surgical procedures (e.g., incision, removal of bone edges, root amputation) were performed. RESULTS We found that root amputation (OR = 6.64), extraction of a single tooth (OR = 3.70), bone loss or severe tooth mobility (OR = 3.60), and an unclosed wound (OR = 2.51) were significantly associated with increased risk of developing MRONJ. CONCLUSIONS We recommend a minimally traumatic extraction technique, removal of any bone edges, and mucosal wound closure as standard procedures in patients receiving bisphosphonates. We find no evidence supporting the efficacy of a pre-extraction short-term drug holiday from oral bisphosphonates in reducing the risk of MRONJ.
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Affiliation(s)
- T Hasegawa
- Department of Oral and Maxillofacial Surgery, Kobe University Graduate School of Medicine, 7-5-1, Kusunoki-cho, Chuo-ku, Kobe, 650-0017, Japan.
| | - A Kawakita
- Department of Clinical Oral Oncology, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - N Ueda
- Department of Oral and Maxillofacial Surgery, Nara Medical University, Nara, Japan
| | - R Funahara
- Department of Oral and Maxillofacial Surgery, Kobe University Graduate School of Medicine, 7-5-1, Kusunoki-cho, Chuo-ku, Kobe, 650-0017, Japan
| | - A Tachibana
- Department of Oral and Maxillofacial Surgery, Kakogawa Central City Hospital, Kakogawa, Japan
| | - M Kobayashi
- Department of Oral and Maxillofacial Surgery, Shin-Suma General Hospital, Kobe, Japan
| | - E Kondou
- Department of Dentistry and Oral Surgery, Shinshu University School of Medicine, Matsumoto, Japan
| | - D Takeda
- Department of Oral and Maxillofacial Surgery, Kobe Central Hospital, Kobe, Japan
| | - Y Kojima
- Department of Dentistry and Oral Surgery, Kansai Medical University, Hirakata, Japan
| | - S Sato
- Department of Oral Maxillofacial Surgery, Nagoya City University Graduate School of Medical Sciences, Nagoya, Japan
| | - S Yanamoto
- Department of Clinical Oral Oncology, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - H Komatsubara
- Department of Oral and Maxillofacial Surgery, Kobe Central Hospital, Kobe, Japan
| | - M Umeda
- Department of Clinical Oral Oncology, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - T Kirita
- Department of Oral and Maxillofacial Surgery, Nara Medical University, Nara, Japan
| | - H Kurita
- Department of Dentistry and Oral Surgery, Shinshu University School of Medicine, Matsumoto, Japan
| | - Y Shibuya
- Department of Oral Maxillofacial Surgery, Nagoya City University Graduate School of Medical Sciences, Nagoya, Japan
| | - T Komori
- Department of Oral and Maxillofacial Surgery, Kobe University Graduate School of Medicine, 7-5-1, Kusunoki-cho, Chuo-ku, Kobe, 650-0017, Japan
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Hasegawa T, Sadakane H, Kobayashi M, Tachibana A, Oko T, Ishida Y, Fujita T, Takenono I, Komatsubara H, Takeuchi J, Ichiki K, Miyai D, Komori T. A multi-centre retrospective study of mandibular fractures: do occlusal support and the mandibular third molar affect mandibular angle and condylar fractures? Int J Oral Maxillofac Surg 2016; 45:1095-9. [PMID: 27134046 DOI: 10.1016/j.ijom.2016.04.004] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2015] [Revised: 12/30/2015] [Accepted: 04/07/2016] [Indexed: 11/17/2022]
Abstract
This retrospective study was performed to investigate the influence of occlusal support and the presence, state, and position of mandibular third molars on the incidence of mandibular angle and condylar fractures. The following variables were investigated: age, sex, cause of fracture, presence and state (impaction, angulation, and the number of roots) of the mandibular third molars, site of the mandibular fracture, presence of occlusal support, duration of intermaxillary fixation, and postoperative complications. Various risk factors for mandibular angle and condylar fractures were investigated by univariate analysis. The risk of mandibular angle fracture was significantly higher in patients with occlusal support and mandibular third molars. The risk of condylar fracture was significantly higher in patients without occlusal support or mandibular third molars. The position and angulation of the mandibular third molars were not significant risk factors in mandibular angle and condylar fractures. This study demonstrated the influence of occlusal support and the presence of mandibular third molars on the incidence of mandibular angle and condylar fractures. The presence of occlusal support may be a more important factor affecting mandibular angle or condylar fractures than the position of the mandibular third molars.
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Affiliation(s)
- T Hasegawa
- Department of Oral and Maxillofacial Surgery, Kobe University Graduate School of Medicine, Kobe, Japan.
| | - H Sadakane
- Department of Oral and Maxillofacial Surgery, Kobe University Graduate School of Medicine, Kobe, Japan
| | - M Kobayashi
- Department of Oral and Maxillofacial Surgery, Shin-Suma General Hospital, Kobe, Japan
| | - A Tachibana
- Department of Oral and Maxillofacial Surgery, Kakogawa East City Hospital, Kakogawa, Japan
| | - T Oko
- Department of Oral and Maxillofacial Surgery, Saiseikai Hyogo-ken Hospital, Kobe, Japan
| | - Y Ishida
- Department of Oral and Maxillofacial Surgery, Hyogo Prefectural Awaji Medical Center, Hyogo, Japan
| | - T Fujita
- Department of Oral and Maxillofacial Surgery, Mitsubishi Kobe Hospital, Kobe, Japan
| | - I Takenono
- Department of Oral and Maxillofacial Surgery, Kawasaki Hospital, Kobe, Japan
| | - H Komatsubara
- Department of Oral and Maxillofacial Surgery, Kobe Central Hospital, Kobe, Japan
| | - J Takeuchi
- Department of Oral and Maxillofacial Surgery, Kita-Harima Medical Center, Ono, Japan
| | - K Ichiki
- Department of Oral and Maxillofacial Surgery, Fujii Masao Memorial Hospital, Kurayoshi, Japan
| | - D Miyai
- Department of Oral and Maxillofacial Surgery, Hirono-Kogen Hospital, Kobe, Japan
| | - T Komori
- Department of Oral and Maxillofacial Surgery, Kobe University Graduate School of Medicine, Kobe, Japan
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Kamishohara M, Komatsubara H, Kakinuma H, Tanaka R, Nakamura Y, Kobayashi H. Is Lymphoid Leukemia Less Susceptible to Busulfan Than Myeloid Leukemia? Comparison of Cytotoxicities of Busulfan, Melphalan, Fludarabine, Clofarabine, Cytosine Arabinoside, and Etoposide in Human Myeloid and Lymphoid Leukemia Cell Lines. Biol Blood Marrow Transplant 2015. [DOI: 10.1016/j.bbmt.2014.11.286] [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: 10/24/2022]
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Umeda M, Komatsubara H, Ojima Y, Minamikawa T, Shibuya Y, Yokoo S, Ishii J, Komori T. A comparison of brachytherapy and surgery for the treatment of stage I–II squamous cell carcinoma of the tongue. Int J Oral Maxillofac Surg 2005; 34:739-44. [PMID: 15921890 DOI: 10.1016/j.ijom.2005.02.015] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2004] [Accepted: 02/14/2005] [Indexed: 11/16/2022]
Abstract
The treatment method for early stage tongue cancer is still controversial in Japan. The aim of this study is to compare the prognosis for patients with early tongue cancer treated with brachytherapy and surgery. A retrospective study was conducted to compare the efficacy of low-dose-rate brachytherapy (LDR), high-dose-rate brachytherapy (HDR), and surgery for early tongue cancer. A total of 180 patients with stage I-II tongue cancer were divided into three treatment groups: LDR (78), HDR (26), and surgery (71). Local recurrence was seen in thirteen patients (17%) of the LDR, nine (35%) of the HDR, and four (6%) of the surgery group. After salvage therapy, final local cure was obtained for 71 patients (91%) of the LDR, 22 (85%) of the HDR, and 71 (100%) of the surgery group. Neck failure was recorded for eight patients in the LDR, six in the HDR, and three in the surgery group. The respective 5-year overall survival rates for the LDR, HDR and surgery groups were 84.0%, 72.9%, 95.4% for stage I, and 72.2%, 51.5%, 93.8% for stage II. These findings show that surgery is the optimal treatment method for patients with stage I-II tongue cancer.
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Affiliation(s)
- M Umeda
- Department of Oral and Maxillofacial Surgery, Kobe University Graduate School of Medicine, 7-5-1 Kusunoki-Cho, Chuo-Ku, Kobe 650-0017, Japan.
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Takano JI, Narita T, Tachibana H, Shimizu T, Komatsubara H, Terao K, Fujimoto K. Entamoeba histolytica and Entamoeba dispar infections in cynomolgus monkeys imported into Japan for research. Parasitol Res 2005; 97:255-7. [PMID: 15991045 DOI: 10.1007/s00436-005-1415-6] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2005] [Accepted: 05/18/2005] [Indexed: 11/26/2022]
Abstract
Three hundred and three stool samples of cynomolgus monkeys (Macaca fascicularis) imported from China and the Philippines were examined for Entamoeba histolytica/Entamoeba dispar infections. Microscopy detected E. histolytica/E. dispar cysts in 41 samples. Positive rates were higher in the monkeys from China (37.5%) than in the monkeys from the Philippines (3.7%). PCR analysis of 25 samples successfully cultured from the cysts demonstrated that 24 were E. dispar, one of the samples from China was E. histolytica. The one sample was also identified as E. histolytica by an antigen detection kit, although the monkey was asymptomatic and serology was negative. To our knowledge, this is the first report of E. histolytica isolation from cynomolgus monkeys based on the discrimination between E. histolytica and E. dispar.
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MESH Headings
- Animals
- Antigens, Protozoan/immunology
- China/epidemiology
- DNA, Protozoan/analysis
- Dysentery, Amebic/diagnosis
- Dysentery, Amebic/epidemiology
- Dysentery, Amebic/veterinary
- Entamoeba histolytica/genetics
- Entamoeba histolytica/immunology
- Entamoeba histolytica/isolation & purification
- Feces/parasitology
- Intestinal Diseases, Parasitic/diagnosis
- Intestinal Diseases, Parasitic/epidemiology
- Intestinal Diseases, Parasitic/veterinary
- Japan
- Macaca fascicularis/parasitology
- Monkey Diseases/diagnosis
- Monkey Diseases/epidemiology
- Monkey Diseases/parasitology
- Parasitic Diseases, Animal/diagnosis
- Parasitic Diseases, Animal/epidemiology
- Philippines/epidemiology
- Polymerase Chain Reaction
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Affiliation(s)
- Jun-ichiro Takano
- The Corporation for Production and Research of Laboratory Primates, 1 Hachimandai, Tsukuba-shi Ibaraki, 305-0843, Japan.
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Yokoo S, Umeda M, Komatsubara H, Shibuya Y, Komori T. Evaluation of T-classifications of upper gingival and hard palate carcinomas--a proposition for new criterion of T4. Oral Oncol 2002; 38:378-82. [PMID: 12076703 DOI: 10.1016/s1368-8375(01)00077-x] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Most carcinomas of upper gingiva and hard palate are classified as T4 stage on the basis of the UICC criteria, since they easily invade the underlying bone tissue. We classified 43 patients with squamous cell carcinoma of the upper gingiva in terms of three criteria: (1) the original T-classification by UICC, (2) the classification by the Japan Society for Head and Neck Cancer (JSHNC), and (3) a new classification in which the maxillary sinus or nasal floor is used as the defining borderline for T4 (MSF classification). Our study demonstrated that the new classification was superior with regard to distribution of patients by T stage, correlation with prognosis and choice of treatment method.
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Affiliation(s)
- S Yokoo
- Department of Oral and Maxillofacial Surgery, Kobe University Graduate School of Medicine, 7-5-2 Kusunoki-Cho, Chuo-ku, Kobe 650-0017, Japan
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Umeda M, Komatsubara H, Nishimatsu N, Oku N, Shibuya Y, Yokoo S, Komori T. Establishment and characterization of a human adenoid cystic carcinoma line of the salivary gland which is serially transplantable and spontaneously metastasises to the lung in nude mice. Oral Oncol 2002; 38:30-4. [PMID: 11755818 DOI: 10.1016/s1368-8375(01)00010-0] [Citation(s) in RCA: 10] [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: 11/30/2022]
Abstract
Adenoid cystic carcinoma (ACC) is a rare malignant tumour of the head and neck occurring in the salivary glands. We established a human ACC line which is serially transplantable in nude mice and designated it as KOA-1. The KOA-1 tumour doubled in 9.3 days and retained the histological characteristics of a solid pattern of ACC even after 22 serial passages. The KOA-1 metastasised to the lung when transplanted subcutaneously into the back. This tumour line may serve as a useful model for exploration of the biological behaviour and treatment of human ACC.
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Affiliation(s)
- M Umeda
- Department of Oral and Maxillofacial Surgery, Kobe University Graduate School of Medicine, 7-5-1 Kusunoki-Cho, Chuo-Ku, Kobe 650-0017, Japan.
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Umeda M, Komatsubara H, Nishimatsu N, Yokoo S, Shibuya Y, Komori T. High-dose rate interstitial brachytherapy for stage I-II tongue cancer. Oral Surg Oral Med Oral Pathol Oral Radiol Endod 2000; 90:667-70. [PMID: 11077395 DOI: 10.1067/moe.2000.110087] [Citation(s) in RCA: 25] [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] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
OBJECTIVE This retrospective clinical study evaluated the usefulness of high-dose rate (HDR) brachytherapy for stage I-II tongue cancer in comparison with traditional low-dose rate (LDR) brachytherapy. MATERIALS AND METHODS Twenty-five patients with stage I-II tongue cancer underwent HDR between 1995 and 1999. The status of local control and late neck metastasis, survival rate, and frequency of osteonecrosis in these patients were examined in comparison with a historical control made up of 71 patients who underwent LDR between 1980 and 1995. RESULTS The local control rate and survival rate were lower in the HDR group than in the LDR group. There were no apparent differences in the frequency of late neck metastasis between the two groups. Osteonecrosis occurred earlier and more frequently in the HDR group. CONCLUSION We would caution the use of HDR brachytherapy until further studies are done in many institutions.
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Affiliation(s)
- M Umeda
- Department of Oral and Maxillofacial Surgery, Kobe University School of Medicine, Japan.
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Arakawa T, Jongsareejit B, Tatsumi Y, Tanaka K, Ikeda K, Komatsubara H, Inoue H, Kawakami B, Oka M, Emi S, Yomo T, Shima Y, Negoro S, Urabe I. Application of N-terminally truncated DNA polymerase from Thermus thermophilus (delta Tth polymerase) to DNA sequencing and polymerase chain reactions: comparative study of delta Tth and wild-type Tth polymerases. DNA Res 1996; 3:87-92. [PMID: 8804860 DOI: 10.1093/dnares/3.2.87] [Citation(s) in RCA: 21] [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: 02/02/2023] Open
Abstract
N-Terminally truncated DNA polymerase from Thermus thermophilus (delta Tth polymerase) lacking 5'-3' exonuclease activity was used for DNA sequencing and polymerase chain reaction (PCR). In contrast to the high background of the sequencing ladder observed with the wild-type Tth polymerase, delta Tth polymerase gave readable sequencing patterns which extend up to more than 500 bases from the primer site on cycle sequencing and automated sequencing. The delta Tth polymerase was used for the standard and mutagenic PCR, and net amplification of the DNA and the mutations accumulated during PCR were analyzed. Under mutagenic PCR, the mutation rates were 7.0 x 10(-4) (Tth) and 8.3 x 10(-4) (delta Tth) per nucleotide per cycle of amplification, which were 4-9 times higher than the rates under standard PCR.
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Affiliation(s)
- T Arakawa
- Tsuruga Institute of Biotechnology, Toyobo Co. Ltd., Fukui, Japan
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Shibata H, Hirotsune S, Okazaki Y, Komatsubara H, Muramatsu M, Takagi N, Ueda T, Shiroishi T, Moriwaki K, Katsuki M. Genetic mapping and systematic screening of mouse endogenously imprinted loci detected with restriction landmark genome scanning method (RLGS). Mamm Genome 1994; 5:797-800. [PMID: 7894162 DOI: 10.1007/bf00292016] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- H Shibata
- Gene Bank, RIKEN Tsukuba Life Science Center, Institute of Physical and Chemical Research (RIKEN), Ibaraki, Japan
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Okuda K, Yamada T, Imoto H, Komatsubara H, Sugimoto O. Antigenic alteration of an anomalous human luteinizing hormone caused by two chorionic gonadotropin-type amino-acid substitutions. Biochem Biophys Res Commun 1994; 200:584-90. [PMID: 8166733 DOI: 10.1006/bbrc.1994.1488] [Citation(s) in RCA: 32] [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: 01/29/2023]
Abstract
We analyzed the nucleotide sequence of the luteinizing hormone beta subunit (LH beta) in a patient with an anomalous LH. This anomalous LH showed abnormal immunogenicity, but normal bioactivity, suggesting that this variance of antigenicity was caused by amino acid substitution(s). In the anomalous LH, two single amino acid substitutions, Trp(TGG) to Arg(CGG) and Ile(ATC) to Thr(ACC), were found at the codon for the 8th and 15th residue of LH beta. These two substituted amino acid residues of the anomalous LH are identical to those of chorionic gonadotropin, but not to those of LH, although the rest of the region showed the normal sequence of human LH beta. Pedigree analysis by direct DNA sequencing revealed that the parents of the patient and the healthy sister were heterozygotes for the mutation and the patient and the healthy brother were homozygotes.
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Affiliation(s)
- K Okuda
- Department of Obstetrics and Gynecology, Osaka Medical College, Japan
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Hirotsune S, Hatada I, Komatsubara H, Nagai H, Kuma K, Kobayakawa K, Kawara T, Nakagawara A, Fujii K, Mukai T. New approach for detection of amplification in cancer DNA using restriction landmark genomic scanning. Cancer Res 1992; 52:3642-7. [PMID: 1617637] [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: 12/27/2022]
Abstract
We developed a new approach for detecting the gene amplification of cancer DNAs with restriction landmark genomic scanning (RLGS). In cancer research, much effort has been made to find the amplified loci of cancer DNAs, because many lines of evidence indicate association between oncogene amplification and carcinogenesis. Conventionally, such gene amplification has been detected by using Southern hybridization with DNA probes. However, only the information of one locus can be obtained by one hybridization procedure, and analysis of many loci throughout the genome is too laborious and time consuming, even if only several candidate genes are investigated. On the other hand, the "in-gel renaturation method" was reported as another alternative for detection of amplified regions. However, even though this method is much improved, it is difficult to detect less than 7-fold amplification, which is often higher than the amplification of many cancer cases. To overcome these limitations and, in addition, to locate the amplified DNA two dimensionally, we applied RLGS for analysis of DNA amplification in cancer tissues, such as breast cancer (infiltrative tubuloadenocarcinoma), neuroblastoma, meningioma (endotheliomatous meningioma), and thyroid cancer (papillary adenocarcinoma). In some cases of breast cancer, several amplified spots located on the same amplicon were detected. In thyroid cancer, in which no amplification has yet been reported, low-grade amplification was also detected. In this report, we demonstrated that RLGS allows us to screen 2000-3000 restriction landmarks distributed on the genome simultaneously, and even low-grade amplification could be detected effectively. Thus, RLGS has proven to be a very useful method in detecting DNA amplification.
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Affiliation(s)
- S Hirotsune
- Department of Bioscience, National Cardiovascular Center Research Institute, Suita, Japan
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Hatada I, Hayashizaki Y, Hirotsune S, Komatsubara H, Mukai T. A genomic scanning method for higher organisms using restriction sites as landmarks. Proc Natl Acad Sci U S A 1991; 88:9523-7. [PMID: 1946366 PMCID: PMC52750 DOI: 10.1073/pnas.88.21.9523] [Citation(s) in RCA: 257] [Impact Index Per Article: 7.8] [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: 12/29/2022] Open
Abstract
We have developed a powerful genomic scanning method, termed "restriction landmark genomic scanning," that is useful for analysis of the genomic DNA of higher organisms using restriction sites as landmarks. Genomic DNA is radioactively labeled at cleavage sites specific for a rare cleaving restriction enzyme and then size-fractionated in one dimension. The fractionated DNA is further digested with another more frequently occurring enzyme and separated in the second dimension. This procedure gives a two-dimensional pattern with thousands of scattered spots corresponding to sites for the first enzyme, indicating that the genome of mammals can be scanned at approximately 1-megabase intervals. The position and intensity of a spot reflect its locus and the copy number of the corresponding restriction site, respectively, based on the nature of the end-labeling system. Therefore, this method is widely applicable to genome mapping or detection of alterations in a genome.
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Affiliation(s)
- I Hatada
- Department of Bioscience, National Cardiovascular Center Research Institute, Osaka, Japan
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Hirata H, Komatsubara H, Blumund W, Rawdon HS, Glockerund R, Kaupp E, Foerster F, Clark GL, Fr�lich PK, Aten AHW, Boerlage LM, Kohlsch�tter V, Good A, Jakober F, Brown DJ, Heyrovsky J, Aumonier FS, Sand HJS, Hackford JE, Lukens HS, Schleicher A, Toussaint L, Lassieur A, Wiechowski S, Rom H, Jilek A, Lukas J, M�ller E, Belasio R, Mellana E, Drossbach P, Ginsberg H, Geith R. Elektroanalyse. Anal Bioanal Chem 1928. [DOI: 10.1007/bf01470201] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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