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Saiga M, Hosoya Y, Utsunomiya H, Kuramoto Y, Watanabe S, Tomita K, Aihara Y, Muto M, Hikosaka M, Kawaguchi T, Miyaji T, Yamaguchi T, Zenda S, Goto A, Sakuraba M, Kusano T, Miyabe K, Kuroki T, Yano T, Taminato M, Sekido M, Tsunoda Y, Satake T, Doihara H, Kimata Y. Protocol for a multicentre, prospective, cohort study to investigate patient satisfaction and quality of life after immediate breast reconstruction in Japan: the SAQLA study. BMJ Open 2021; 11:e042099. [PMID: 33589456 PMCID: PMC7887355 DOI: 10.1136/bmjopen-2020-042099] [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] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
INTRODUCTION The aim of breast reconstruction (BR) is to improve patients' health-related quality of life (HRQOL). Therefore, measuring patient-reported outcomes (PROs) would clarify the value and impact of BR on a patient's life and thus would provide evidence-based information to help decision-making. The Satisfaction and Quality of Life After Immediate Breast Reconstruction study aimed to investigate satisfaction and HRQOL in Japanese patients with breast cancer who undergo immediate breast reconstruction (IBR). METHODS AND ANALYSIS This ongoing prospective, observational multicentre study will assess 406 patients who had unilateral breast cancer and underwent mastectomy and IBR, and were recruited from April 2018 to July 2019. All participants were recruited from seven hospitals: Okayama University Hospital, Iwate Medical University Hospital, The Cancer Institute Hospital of Japanese Foundation for Cancer Research, Showa University Hospital, University of Tsukuba Hospital, Osaka University Hospital and Yokohama City University Medical Center. The patients will be followed up for 36 months postoperatively. The primary endpoint of this study will be the time-dependent changes in BREAST-Q satisfaction with breast subscale scores for 12 months after reconstructive surgery, which will be collected via an electronic PRO system. ETHICS AND DISSEMINATION This study will be performed in accordance with the Ethical Guidelines for Medical and Health Research Involving Human Subjects published by Japan's Ministry of Education, Science and Technology and the Ministry of Health, Labour and Welfare, the modified Act on the Protection of Personal Information and the Declaration of Helsinki. This study protocol was approved by the institutional ethics committee at the Okayama University Graduate School of Medicine, Dentistry, on 2 February 2018 (1801-039) and all other participating sites. The findings of this trial will be submitted to an international peer-reviewed journal. TRIAL REGISTRATION NUMBER UMIN000032177.
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Affiliation(s)
- Miho Saiga
- Department of Plastic and Reconstructive Surgery, Okayama University Hospital, Okayama, Japan
| | - Yuko Hosoya
- Department of Plastic and Reconstructive Surgery, Iwate Medical University, Morioka, Japan
| | - Hiroki Utsunomiya
- Department of Surgery and Plastic Surgery, Showa University Koto Toyosu Hospital, Tokyo, Japan
| | - Yukiko Kuramoto
- Department of Plastic and Reconstructive Surgery, Cancer Institute Hospital of Japanese Foundation for Cancer Research, Tokyo, Japan
| | - Satoko Watanabe
- Department of Plastic and Reconstructive Surgery, Okayama University Hospital, Okayama, Japan
| | - Koichi Tomita
- Department of Plastic and Reconstructive Surgery, Graduate School of Medicine, Osaka University, Osaka, Japan
| | - Yukiko Aihara
- Department of Plastic and Reconstructive Surgery, Faculty of Medicine, University of Tsukuba, Tsukuba, Japan
| | - Mayu Muto
- Department of Plastic and Reconstructive Surgery, Yokohama City University Medical Center, Yokohama, Japan
| | - Makoto Hikosaka
- Department of Plastic and Reconstructive Surgery, National Center for Child Health and Development, Tokyo, Japan
| | - Takashi Kawaguchi
- Department of Practical Pharmacy, Tokyo University of Pharmacy and Life Sciences, Tokyo, Japan
| | - Tempei Miyaji
- Department of Clinical Trial Data Management, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Takuhiro Yamaguchi
- Division of Biostatistics, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Sadamoto Zenda
- Division of Radiation Oncology, National Cancer Center Hospital East, Chiba, Japan
| | - Aya Goto
- Department of Plastic and Reconstructive Surgery, Iwate Medical University, Morioka, Japan
| | - Minoru Sakuraba
- Department of Plastic and Reconstructive Surgery, Iwate Medical University, Morioka, Japan
| | | | - Kenta Miyabe
- Department of Plastic and Reconstructive Surgery, Showa University Hospital, Tokyo, Japan
| | - Tomoaki Kuroki
- Department of Plastic and Reconstructive Surgery, Showa University Hospital, Tokyo, Japan
| | - Tomoyuki Yano
- Department of Plastic and Reconstructive Surgery, Cancer Institute Hospital of Japanese Foundation for Cancer Research, Tokyo, Japan
| | - Mifue Taminato
- Department of Plastic and Reconstructive Surgery, Graduate School of Medicine, Osaka University, Osaka, Japan
| | - Mitsuru Sekido
- Department of Plastic and Reconstructive Surgery, Faculty of Medicine, University of Tsukuba, Tsukuba, Japan
| | - Yui Tsunoda
- Department of Plastic and Reconstructive Surgery, Yokohama City University Medical Center, Yokohama, Japan
| | - Toshihiko Satake
- Department of Plastic and Reconstructive Surgery, Toyama University Hospital, Toyama, Japan
| | - Hiroyoshi Doihara
- Department of Breast and Endocrine Surgery, Okayama University Hospital, Okayama, Japan
| | - Yoshihiro Kimata
- Department of Plastic and Reconstructive Surgery, Okayama University Hospital, Okayama, Japan
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Hara T, Hatano M, Saito A, Minatsuki S, Maki H, Amiya E, Hosoya Y, Nagayama K, Sato M, Anraku M, Nakajima J, Komuro I. High Heart Rate and Pulmonary Vascular Resistance Predict Poor Prognosis after Referral for Lung Transplantation in Patients with Pulmonary Arterial Hypertension. J Heart Lung Transplant 2019. [DOI: 10.1016/j.healun.2019.01.1243] [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: 10/27/2022] Open
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Hara T, Hatano M, Saito A, Minatsuki S, Maki H, Amiya E, Hosoya Y, Nagayama K, Sato M, Anraku M, Nakajima J, Komuro I. PROGNOSTIC FACTORS FOR PATIENTS WITH SEVERE PULMONARY ARTERIAL PULMONARY HYPERTENSION DIAGNOSED AS REQUIRING LUNG TRANSPLANTATION. Chest 2019. [DOI: 10.1016/j.chest.2019.02.313] [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: 11/26/2022] Open
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Ko T, Fujita K, Nomura S, Tsuji M, Nitta D, Maki H, Hosoya Y, Amiya E, Hatano M, Ono M, Komuro I. Quantification of DNA Damage in Heart Tissue as a Novel Prediction Tool for Therapeutic Prognosis. J Heart Lung Transplant 2018. [DOI: 10.1016/j.healun.2018.01.578] [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: 11/17/2022] Open
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Ui T, Fujii H, Hosoya Y, Nagase M, Mieno MN, Mori M, Zuiki T, Saito S, Kurashina K, Haruta H, Matsumoto S, Niki T, Lefor A, Yasuda Y. Comparison of preoperative chemotherapy using docetaxel, cisplatin and fluorouracil with cisplatin and fluorouracil in patients with advanced carcinoma of the thoracic esophagus. Dis Esophagus 2014; 28:180-7. [PMID: 24529073 DOI: 10.1111/dote.12187] [Citation(s) in RCA: 17] [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: 12/11/2022]
Abstract
We retrospectively compared preoperative docetaxel, cisplatin, and fluorouracil (DCF) with cisplatin and fluorouracil (CF) in patients with esophageal cancer. The study included patients with advanced thoracic esophageal carcinoma (excluding T4 tumors) receiving preoperative chemotherapy. In the DCF group, five patients received two courses of treatment every 4 weeks, and 33 patients received three courses every 3 weeks. In the CF group, 38 patients received two courses of treatment every 4 weeks. Patients underwent curative surgery 4-5 weeks after completing chemotherapy. Patient demographic characteristics did not differ between the two study groups. The incidence of a grade 3 or 4 hematologic toxicity was significantly higher in the DCF group (33 patients) than in the CF group (five patients; P < 0.001). Curative resection was accomplished in 79% of patients in the DCF group and 66% in the CF group (P = 0.305). There were no in-hospital deaths. The incidence of perioperative complications did not differ between the groups. A grade 2 or 3 histological response was attained in a significantly higher proportion of patients in the DCF group (63%) than in the CF group (5%; P < 0.001). Progression-free survival and overall survival were significantly higher in the DCF group (P = 0.013, hazard ratio 0.473; P = 0.001, hazard ratio 0.344). In conclusion, a grade 3 or 4 hematologic toxicity was common in the DCF group but was managed by supportive therapy. Histological response rate, progression-free survival, and overall survival were significantly higher in the DCF group compared with the CF group.
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Affiliation(s)
- T Ui
- Department of Surgery, Jichi Medical University, Shimotsuke, Tochigi, Japan
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Sasaki N, Murata O, Ninomiya Y, Hosoya Y, Suzuki N, Koizumi R, Nakamura Y, Kobayashi H, Yamauchi K, Sasaki M. SAT0507 Detection of Novel Cerebral Microvessel Lesions in Patients with Neuropsychiatric Systemic Lupus Erythematosus by 7Tesla MRI. Ann Rheum Dis 2013. [DOI: 10.1136/annrheumdis-2013-eular.2231] [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]
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Iwamoto A, Benetello V, Hosoya Y, Puppin-Rontani R, Pascon F. Short-term evaluation on bond strength between resin cement and primary teeth. Dent Mater 2013. [DOI: 10.1016/j.dental.2013.08.157] [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: 12/01/2022]
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Hara H, Daiko H, Kato K, Igaki H, Kadowaki S, Tanaka Y, Hamamoto Y, Matsushita H, Nagase M, Hosoya Y, Tahara M. Final results of feasibility study of neoadjuvant chemotherapy with docetaxel, cisplatin, and fluorouracil (DCF) for clinical stage II/III esophageal squamous cell carcinoma. J Clin Oncol 2011. [DOI: 10.1200/jco.2011.29.15_suppl.4060] [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
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Hosoya Y, Tay F, Ono T, Miyazaki M. Hardness, elasticity and ultrastructure of primary tooth dentin bonded with a self-reinforcing one-step self-etch adhesive. J Dent 2010; 38:214-21. [DOI: 10.1016/j.jdent.2009.10.006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2009] [Revised: 09/12/2009] [Accepted: 10/22/2009] [Indexed: 10/20/2022] Open
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Hosoya Y, Taguchi T, Arita S, Tay FR. Clinical evaluation of polypropylene glycol-based caries detecting dyes for primary and permanent carious dentin. J Dent 2008; 36:1041-7. [PMID: 18938022 DOI: 10.1016/j.jdent.2008.08.010] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2008] [Revised: 08/29/2008] [Accepted: 08/29/2008] [Indexed: 10/21/2022] Open
Abstract
OBJECTIVE The aim of this study was to compare the clinical efficacy of new caries detecting dye Caries Check Blue (CCB) with Caries Check (CC) and Caries Detector (CD) using a laser fluorescence device (DIAGNOdent). METHOD Primary and permanent teeth with dentin caries were stained with polypropylene glycol (MW=300) based new caries detecting dyes CCB, CC, or propylene glycol (MW=76) based CD. In the CCB and CC groups, stained dentin was completely removed. In the CD groups, pink-stained dentin was retained according to the manufacturers' instructions. Cavities before and after caries removal were measured with the DIAGNOdent. Data were analyzed using ANOVA and Fisher's PLSD multiple comparison test at alpha=0.05. Regression analyses were performed between DIAGNOdent readings and scores obtained from the clinical parameters. RESULTS The DIAGNOdent readings after caries removal were: primary-CCB (13.2+/-10.4), primary-CC (14.3+/-16.7), primary-CD (9.0+/-5.2), permanent-CCB (22.7+/-13.4), permanent-CC (10.6+/-6.8) and permanent-CD (9.7+/-9.0). Significant differences were identified between the permanent-CCB and all other groups. Correlation coefficients between DIAGNOdent readings and clinical parameters were low. CONCLUSIONS When dentin stained with Caries Check Blue or Caries Check was completely removed, the DIAGNOdent readings were higher than those recorded when palely-stained pink dentin was retained with the Caries Detector, with significant difference observed for the permanent-CCB group. Caries Check Blue may be used clinically to avoid excessive removal of caries-affected or sound dentin in permanent teeth but not in primary teeth.
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Affiliation(s)
- Y Hosoya
- Nagasaki University Graduate School of Biomedical Sciences, Medical and Dental Sciences, Unit of Translational Medicine, Department of Pediatric Dentistry, 1-7-1, Sakamoto, Nagasaki, 852-8588, Japan.
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Hosoya Y, Hirashima Y, Hyodo M, Haruta H, Kurashina K, Saito S, Zuiki T, Yasuda Y, Nagai H. A new operative technique for the resection of gastric tube cancer by means of lifting the anterior chest wall and videoscope-assisted surgery. Dis Esophagus 2008; 21:275-8. [PMID: 18430112 DOI: 10.1111/j.1442-2050.2007.00711.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [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: 12/11/2022]
Abstract
The prolonged survival of patients receiving surgery for esophageal cancer has led to an increased incidence of adenocarcinoma arising in the gastric tube used for reconstruction (gastric tube cancer). In patients with advanced gastric tube cancer, resection of the gastric tube should be considered, but currently available procedures are very invasive. In patients undergoing curative surgery for gastric tube cancer that has developed after reconstruction through the retrosternal route, the gastric tube is usually resected through a median sternotomy, followed by reconstruction with the colon. However, postoperative complications often occur and treatment outcomes remain poor. We developed a new surgical technique for gastric tube resection without performing a sternotomy in patients with gastric tube cancer who had previously undergone reconstruction through the retrosternal route. Our technique was used to treat two patients. Two Kirschner wires were passed subcutaneously through the anterior chest; the chest was lifted to extend the retrosternal space and secure an adequate surgical field. The stomach was separated from the surrounding tissue under videoscopic guidance. Total resection of the gastric tube was done. The retrosternal space was used to lift the jejunum. Roux-en-Y reconstruction was performed. Neither patient had suture line failure or surgical site infection. Their recovery was uneventful. Our surgical technique has several potential advantages including (i) reduced surgical stress; (ii) the ability to use the retrosternal space for reconstruction after gastric tube resection; and (iii) a reduced risk of serious infections such as osteomyelitis in patients with suture line failure. Our findings require confirmation by additional studies.
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Affiliation(s)
- Y Hosoya
- Department of Surgery, Jichi Medical University, Tochigi, Japan.
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Kashiwa K, Kobayashi S, Kimura H, Honda T, Nohara T, Fujiwara H, Hosoya Y, Arai Y. Reconstruction of a Severe Maxillofacial Deformity After Tumorectomy and Irradiation Using Distraction Osteogenesis and LeFort I Osteotomy Before Vascularized Bone Graft. J Craniofac Surg 2007; 18:1133-7. [PMID: 17912098 DOI: 10.1097/scs.0b013e318157280b] [Citation(s) in RCA: 15] [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] [Indexed: 11/27/2022] Open
Abstract
We present the successful reconstruction of a large mandibular defect with a severe maxillofacial deformity after malignant tumor resection and irradiation. The patient was a 16-year-old boy with a defect in the left mandible, which extended from the mandibular body to the condylar process and hypoplasia of the maxillozygomatic complex on the left side as a result of ablation and radiotherapy of a grown rhabdomyosarcoma in the left infratemporal fossa at the age of 10. We planned a two-stage reconstruction because of his wide mandibular defect and hypoplasia. LeFort I type osteotomy to correct the maxillary declination was combined with mandibular lengthening to decrease the width of the defect in the first stage. New bone formation was confirmed at the distraction site 4 months after surgery, and the second stage was performed. A free latissimus dorsi myocutaneous flap with a vascularized scapula and rib was transferred to reconstruct the ramus of the mandible, zygomatic arch, and soft tissues. This procedure resulted in satisfactory results. In conclusion, the combination of distraction osteogenesis and microsurgical bone transplantation facilitated the straightforward reconstruction of a three-dimensional deformity with huge bony defects. We think that this combined surgical procedure will become a favorable option in the treatment of severe maxillomandibular deformities with bone defects.
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Affiliation(s)
- Katsuhiko Kashiwa
- Department of Plastic and Reconstructive Surgery, Faculty of Medicine, Iwate Medical University, Morioka, Japan.
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Hyodo M, Hosoya Y, Hirashima Y, Haruta H, Kurashina K, Saito S, Yokoyama T, Arai W, Zuiki T, Yasuda Y, Nagai H. Minimum leakage rate (0.5%) of stapled esophagojejunostomy with sacrifice of a small part of the jejunum after total gastrectomy in 390 consecutive patients. Dig Surg 2007; 24:169-72. [PMID: 17476107 DOI: 10.1159/000102100] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
BACKGROUND The development of new surgical instruments and devices has facilitated the performance of esophagojejunostomy after total gastrectomy. However, total prevention of dehiscence of anastomoses remains difficult. We introduced a new procedure for esophagojejunostomy using a circular stapler, requiring sacrifice of only a small part of the jejunum. METHODS The study group comprised 390 consecutive patients who underwent reconstruction by Roux-en-Y esophagojejunostomy, performed with a circular stapler, sacrificing a small part of the jejunum after total gastrectomy. We assessed anastomotic leakage and anastomotic stenosis after surgery. RESULTS Only 2 patients (0.5%) had leakage and 4 (1.0%) had anastomotic stenosis after reconstruction. All the patients were cured by conservative therapy. CONCLUSIONS Esophagojejunostomy performed with a circular stapler after total gastrectomy, with sacrifice of only a small part of the jejunum, is a useful and easy procedure, with a leakage rate of 0.5%.
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Affiliation(s)
- M Hyodo
- Department of Surgery, Jichi Medical University, Shimotsuke, Japan.
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Hosoya Y, Taguchi T, Tay FR. Evaluation of a new caries detecting dye for primary and permanent carious dentin. J Dent 2007; 35:137-43. [PMID: 16945461 DOI: 10.1016/j.jdent.2006.06.004] [Citation(s) in RCA: 16] [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: 04/06/2006] [Revised: 06/04/2006] [Accepted: 06/19/2006] [Indexed: 10/24/2022] Open
Abstract
OBJECTIVE This study evaluated the clinical efficacy of a new caries detecting dye using a laser fluorescence device (DIAGNOdent). METHOD Primary and permanent teeth with dentin caries were stained with Caries Check (CC), containing 1% acid red in polypropylene glycol (MW=300) or Caries Detector (CD), containing 1% acid red in propylene glycol (MW=76). Primary-CC, primary-CD, permanent-CC and permanent-CD groups were prepared. In the CC groups, stained dentin was completely removed. In the CD groups, pink-stained dentin was retained according to the manufacturers' instructions. Cavities before and after caries removal were measured with the DIAGNOdent. Data were analyzed using ANOVA and Fisher's PLSD multiple comparison test at alpha=0.05. Regression analyses were performed between DIAGNOdent readings and scores obtained from the clinical parameters. RESULTS For all groups, there were no significant differences in the DIAGNOdent readings before treatment. The DIAGNOdent readings after caries removal were: primary-CC (16.0+/-17.6), primary-CD (9.6+/-5.2), permanent-CC (11.0+/-7.0) and permanent-CD (7.1+/-3.8). Significant differences were identified between the permanent-CC and primary-CD, and permanent-CC and permanent-CD subgroups but not for the primary subgroups. Correlation coefficients between DIAGNOdent readings and clinical parameters were low. CONCLUSIONS When dentin stained with Caries Check was completely removed, the DIAGNOdent readings were higher than those recorded when palely-stained pink dentin was retained with the Caries Detector, with significant difference observed for the permanent teeth. Caries Check may be used clinically to avoid excessive removal of caries-affected or sound dentin in permanent teeth but not in primary teeth.
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Affiliation(s)
- Y Hosoya
- Nagasaki University Graduate School of Biomedical Sciences, Course of Medical and Dental Sciences, Department of Developmental and Reconstractive Medicine, Division of Pediatric Dentistry, 1-7-1, Sakamoto, Nagasaki 852-8588, Japan.
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Abstract
Biomechanical properties of bonded dentin are important factors for resin restoration. We evaluated the hardness and elastic modulus of bonded sound and caries-affected primary tooth dentin using a one-step adhesive system, and observed the microstructure of the bonded interface. Six sound and six carious primary teeth were used. For sound teeth, flat occlusal dentin surfaces were prepared with a water-cooled high-speed diamond bur. For carious teeth, infected dentin was stained with a caries detector and removed with a water-cooled low-speed round steel bur and hand instruments. The prepared dentin was bonded with One-Up Bond F Plus (Tokuyama Dental Co., Tokyo, Japan). The resin-dentin interface and dentin beneath the interface were measured with a nano-indentation tester and observed with SEM and TEM. For both the carious and sound teeth, there was no significant difference between the hardness of the interfacial dentin and dentin 10-80 microm beneath the interface. However, the Young's modulus of the interfacial dentin was significantly lower than the dentin 40-80 microm (carious teeth) or 50-80 microm (sound teeth) beneath the interface. Both the hardness and Young's modulus of the interfacial dentin were not significantly different between the carious and sound teeth. Compared to the sound dentin, the hybrid layer on the caries-affected dentin was thicker and exhibited more complicated morphologic features. The thickness of the hybrid layers was generally less than 1 microm.
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Affiliation(s)
- Y Hosoya
- Division of Pediatric Dentistry, Department of Developmental and Reconstructive Medicine, Course of Medical and Dental Sciences, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan.
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Abstract
OBJECTIVE Although biomechanical properties of bonded dentin are important for resin restorations, no information for primary teeth has been reported. This study evaluated the hardness and elastic modulus of bonded carious and sound primary tooth dentin using two adhesive systems. METHODS Twelve sound primary molars and 17 carious primary molars were bonded with Clearfil SE Bond (SE: Kuraray) or Single Bond (SB: 3M) and the resin-dentin interface was measured with a nano-indentator and observed with a SEM. Data was statistically analyzed using ANOVA subsequent application of Fisher's PLSD at p<0.01. RESULTS Compared to the dentin beneath the interface, the hardness of the interface dentin was not significantly different (carious-SE, sound-SE and sound-SB groups) or was significantly higher (carious-SB group). Young's modulus of the interface dentin was not significantly different (carious-SE, carious-SB and sound-SB groups) or was significantly lower (sound-SE group) than that for the dentin beneath the interface. In the comparison of the measurement on the interface dentin, the hardness showed no significant differences among all the groups. The Young's modulus of the sound-SE group was significantly lower than that of the carious-SE and sounds-SB groups, but no significant difference was observed between the carious-SB and other groups. CONCLUSIONS Physical properties of bonded primary tooth dentin might differ from that of permanent tooth dentin.
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Affiliation(s)
- Y Hosoya
- Department of Developmental and Reconstructive Medicine, Course of Medical and Dental Sciences, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1, Sakamoto, Nagasaki, 852-8588, Japan.
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Hosoya Y, Shinkawa H, Marshall GW. Influence of Carisolv on resin adhesion for two different adhesive systems to sound human primary dentin and young permanent dentin. J Dent 2005; 33:283-91. [PMID: 15781136 DOI: 10.1016/j.jdent.2004.09.004] [Citation(s) in RCA: 19] [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] [Received: 03/16/2004] [Revised: 09/21/2004] [Accepted: 09/21/2004] [Indexed: 11/26/2022] Open
Abstract
OBJECTIVE This study evaluated the influence of Carisolv (Medi Team) for resin adhesion to sound human primary and young permanent dentin. METHODS The buccal surfaces of 28 primary molars and 64 premolars were used. Two adhesive systems and resin composites were used; SE: Clearfil SE (Kuraray) and Clearfil APX (Kuraray), and SB: Single Bond (3M) and Z250 (3M). Six groups were prepared. Groups 1-2 were primary dentin and Groups 3-6 were permanent dentin. Groups 1 and 3: SE was used. Groups 2 and 4: treated with Carisolv and then primed, SE was used. Group 5: SB was used. Group 6: treated with Carisolv and then etched, SB was used. The microstructural effects of primer or etchant, and Carisolv plus primer or etchant applied to dentin were evaluated by SEM. In addition, the microstructure of the resin-dentin interfaces of each group was studied using SEM. Shear bond strengths (SBS) were tested, and the failed surfaces were observed using SEM. Data was statistically analyzed using ANOVA with subsequent application of Fisher's PLSD at p<0.05. RESULTS The mean SBS (unit: MPa) of Groups 1-6 were: 27.8, 19.2, 21.3, 21.7, 6.7 and 7.6. The SBS of Group 2 was significantly lower than that of Group 1. There was no significant difference of the SBS among Groups 1 and 4, 2, 3 and 4, and 5 and 6. In SE groups, the hybrid layer for primary dentin was thicker than that for permanent dentin. CONCLUSIONS Carisolv treatment before priming significantly decreased the SBS to primary dentin in SE groups, but did not influence the SBS to permanent dentin in both SE and SB groups.
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Affiliation(s)
- Y Hosoya
- Department of Developmental and Reconstructive Medicine, Graduate School of Biomedical Sciences, Nagasaki University, 1-7-1, Sakamoto, Nagasaki, 852-8588 Japan.
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Hosoya Y, Marshall GW. The nano-hardness and elastic modulus of sound deciduous canine dentin and young premolar dentin--preliminary study. J Mater Sci Mater Med 2005; 16:1-8. [PMID: 15754137 DOI: 10.1007/s10856-005-6439-z] [Citation(s) in RCA: 19] [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] [Received: 02/11/2004] [Accepted: 07/20/2004] [Indexed: 05/24/2023]
Abstract
The purpose of this study was to compare the nano-hardness and elastic modulus among deciduous and permanent dentin, buccal and lingual sides, incisal, center and cervical areas, and outer, middle and inner layers. Three premolars and three deciduous canines were bucco lingually (BL) sectioned, and three deciduous canines were mesio-distally (MD) sectioned parallel to the long axis at the center of the tooth. Hardness (H), plastic hardness (PH) and Young's modulus (Y) were measured using a nano-indentation tester. The H, PH and Y values from the deciduous canine dentin were significantly lower than those from the premolar dentin at most sites. For deciduous canine dentin, the H and PH values of the MD sectioned dentin were significantly higher than those of the BL sectioned dentin in many layers of many areas. Generally deciduous canine dentin had H, PH and Y values that decreased from outer toward the inner layers and significant differences were obtained among the layers in many areas. For MD sectioned deciduous canine and BD sectioned premolar dentin, the H, PH and Y values of the cervical area were significantly lower than those of the incisal and center areas in many layers. It is possible that optimum bonding may require different treatments for deciduous and permanent dentin and perhaps also for different intratooth locations.
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Affiliation(s)
- Y Hosoya
- Division of Pediatric Dentistry, Department of Developmental and Reconstructive Medicine, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1, Sakamoto, Nagasaki, 852-8588, Japan.
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Hosoya Y, Yokoyama T, Arai W, Hyodo M, Nishino H, Sugawara Y, Yasuda Y, Nagai H. Tracheoesophageal fistula secondary to chemotherapy for malignant B-cell lymphoma of the thyroid: successful surgical treatment with jejunal interposition and mesenteric patch. Dis Esophagus 2004; 17:266-9. [PMID: 15361103 DOI: 10.1111/j.1442-2050.2004.00401.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
We report a case of tracheoesophageal fistula (TEF) secondary to chemotherapy for primary thyroid lymphoma. A 65-year-old man with a short history of a rapidly enlarging neck mass was diagnosed as having thyroid lymphoma of diffuse, large B-cell type. The TEF occurred during the first course of chemotherapy including cyclophosphamide, doxorubicin, vincristine and prednisolone. After placing a feeding gastrostomy without oral intake, eight cycles of chemotherapy were completed and complete remission was achieved. Although the cervical mass disappeared, TEF and esophageal stenosis persisted. Total thyroidectomy and resection of the stenotic cervical esophagus were carried out followed by interposition of the revascularized jejunum and its mesenteric patch to cover the TEF. This seems to be the first report of a TEF caused by chemotherapy for primary thyroid B-cell lymphoma. A variety of treatments for TEF including simple closure, tracheal resection, colonic bypass and muscle flap have been reported with low success rates. Our procedure using a jejunal mesenteric patch seems to be unique and may be a new treatment strategy for TEF.
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Affiliation(s)
- Y Hosoya
- Department of Surgery Jichi Medical School, Minami-Kawachi, Tochigi, Japan.
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20
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Hosoya Y, Marshall GW. The nano-hardness and elastic modulus of carious and sound primary canine dentin. Oper Dent 2004; 29:142-9. [PMID: 15088724] [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: 04/29/2023]
Abstract
This study measured the nanohardness and elastic modulus- of carious and sound primary canine dentin and compared the values obtained under the lesion and in sound regions of incisal, center and cervical areas, and outer, middle and inner layers. Six extracted or exfoliated primary canines (three with dentin caries on both proximal surfaces and three sound teeth) were mesiodistally sectioned parallel to the long axis of the tooth and polished. The hardness (H), plastic hardness (PH) and Young's modulus (Y) were measured by a nano-indentation tester. Ten indentations at intervals of 10 microm on all regions, areas and layers were made using a load of 1 gf for one second. All indentations were observed using a microscope attached to the tester. All data were statistically analyzed using ANOVA and Scheffe's test at p < 0.05. For sound teeth, the H, PH and Y values of the inner layer were significantly lower than the outer and middle layers in all areas. The H, PH and Y values of the cervical area were significantly lower than the incisal area in almost all of the outer, middle and inner layers. For carious teeth, the H, PH and Y values of the inner layer were significantly lower than the outer and middle layers in the center area. For the center area, the H, PH and Y values under the lesion were significantly lower than sound teeth in the outer and middle layers. Dentin under the lesion, near the pulp and cervical areas showed significantly lower nanohardness and elasticity.
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Affiliation(s)
- Y Hosoya
- Division of Pediatric Dentistry, Department of Developmental and Reconstructive Medicine, Course of Medical and Dental Sciences, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan.
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Hosomi Y, Gemma A, Hosoya Y, Nara M, Okano T, Takenaka K, Yoshimura A, Koizumi K, Shimizu K, Kudoh S. Somatic mutation of the Caspase-5 gene in human lung cancer. Int J Mol Med 2003; 12:443-6. [PMID: 12964016 DOI: 10.3892/ijmm.12.4.443] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
Using cDNA array-based gene expression profiling, we previously found reduced expression of the Caspase-5 gene in highly metastatic subpopulations of a lung cancer cell line. The Caspase-5 gene contained poly(A) repeats in its coding region, an area that has been reported to be mutated in both endometrial and gastrointestinal tumors displaying evidence of microsatellite instability. In order to determine the contribution of Caspase-5 gene inactivation to lung cancer development and progression, the mutational status of the Caspase-5 poly(A) tract in 30 primary lung cancers with distant metastasis and 30 lung cancer cell lines was determined by polymerase chain reaction-single strand conformation polymorphism (PCR-SSCP) analysis and direct sequencing. Three somatic mutations of the Caspase-5 gene were found in two out of 30 lung cancer tissues, although no mutations were found in other genes that also contain small nucleotide repeats, such as hMSH3, hMSH6 and BAX. The results of the present study, combined with our prior cDNA array-based gene expression profiling data, suggest that Caspase-5 might be a suppressor gene of highly metastatic potential in lung cancer.
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Affiliation(s)
- Y Hosomi
- Fourth Department of Internal Medicine, Nippon Medical School, 1-1-5 Sendagi, Bunkyo-ku, Tokyo 113-8602, Japan
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Tagaya N, Mikami H, Kogure H, Kubota K, Hosoya Y, Nagai H. Laparoscopic intragastric stapled resection of gastric submucosal tumors located near the esophagogastric junction. Surg Endosc 2002; 16:177-9. [PMID: 11961634 DOI: 10.1007/s004640080158] [Citation(s) in RCA: 73] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2000] [Accepted: 03/05/2001] [Indexed: 12/11/2022]
Abstract
BACKGROUND Laparoscopic resection cannot be applied easily to tumors located near the esophagogastric junction or the pyloric ring. We evaluated our laparoscopic intragastric surgical technique for gastric submucosal tumors located near the esophagogastric junction and the results of a clinical study. MATERIALS AND METHODS We performed our technique in six patients: one man and five woman with a mean age of 61 years. Using the laparoscopic procedure, after inflation of the stomach, we inserted two or three balloon-type ports into the stomach through the abdominal wall. RESULTS A stapled resection of gastric submucosal tumors using a laparoscopic linear stapler was performed successfully in all the patients. Without exception, stapled resections were successfully performed. The mean operation time was 168 min, and the blood loss was minimal There were no intra- or postoperative complications. The mean postoperative hospital stay was 9.8 days. The mean maximal diameter size of the resected specimens was 2.4 cm. Histopathologic diagnoses were gastrointestinal stromal tumors in five cases and enterogenous cyst in one. There were no recurrences during a mean follow-up period of 27 +/- 11.6 months. CONCLUSION Although we need to evaluate the long-term outcomes, our procedure is considered technically feasible, safe, and useful for the resection of gastric submucosal tumors located near the esophagogastric junction.
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Affiliation(s)
- N Tagaya
- Second Department of Surgery, Dokkyo University School of Medicine, 880 Kitakobayashi, Mibu, Tochigi 321-0293, Japan.
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Uematsu K, Yoshimura A, Gemma A, Mochimaru H, Hosoya Y, Kunugi S, Matsuda K, Seike M, Kurimoto F, Takenaka K, Koizumi K, Fukuda Y, Tanaka S, Chin K, Jablons DM, Kudoh S. Aberrations in the fragile histidine triad (FHIT) gene in idiopathic pulmonary fibrosis. Cancer Res 2001; 61:8527-33. [PMID: 11731438] [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: 02/22/2023]
Abstract
Idiopathic pulmonary fibrosis (IPF) seems to be closely associated with lung carcinogenesis. To identify the genetic characteristics of precancerous IPF lesions in the peripheral lung, we performed PCR-based microsatellite analysis with DNA extracted from microdissected tissues; fluorescent in situ hybridization (FISH) analysis of the fragile histidine triad (FHIT) gene and immunohistochemical analysis of Fhit protein expression in samples of metaplasias and bronchiolar epithelia obtained from patients with IPF. We used four microsatellite markers of the FHIT gene within or flanking the FHIT gene on chromosome 3p for loss of heterozygosity (LOH) analysis. LOH of the FHIT locus was frequently found among the lesions of metaplasias and bronchiolar epithelia in the patients with IPF [62 (52%) of 119 informative lesions]. Fifty-four (73%) of the 74 lesions of metaplasias and bronchiolar epithelia obtained from the IPF patients with lung carcinoma and 8 (17%) of the 46 samples obtained from the IPF patients without lung carcinoma showed LOH at the FHIT gene (P < 0.0001). We confirmed allelic loss in the metaplasias and bronchiolar epithelia of IPF by FISH analysis of the FHIT gene. Additionally, the level of Fhit protein expression in the metaplastic cells of IPF was frequently reduced. Our findings suggest that allelic loss of the FHIT gene may be involved in carcinogenesis in the peripheral lung of patients with IPF.
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Affiliation(s)
- K Uematsu
- The Fourth Department of Medicine, Nippon Medical School, Tokyo 113-8603, Japan
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Ishii M, Inanobe A, Fujita S, Makino Y, Hosoya Y, Kurachi Y. Ca(2+) elevation evoked by membrane depolarization regulates G protein cycle via RGS proteins in the heart. Circ Res 2001; 89:1045-50. [PMID: 11717162 DOI: 10.1161/hh2301.100815] [Citation(s) in RCA: 36] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Regulators of G protein signaling (RGS), which act as GTPase activators, are a family of cytosolic proteins emerging rapidly as an important means of controlling G protein-mediated cell signals. The importance of RGS action has been verified in vitro for various kinds of cell function. Their in situ modes of action in intact cells are, however, poorly understood. Here we show that an increase in intracellular Ca(2+) evoked by membrane depolarization controls the RGS action on G protein activation of muscarinic K(+) (K(G)) channel in the heart. Acetylcholine-induced K(G) current exhibits a slow time-dependent increase during hyperpolarizing voltage steps, referred to as "relaxation." This reflects the relief from the decrease in available K(G) channel number induced by cell depolarization. This phenomenon is abolished when an increase in intracellular Ca(2+) is prevented. It is also abolished when a calmodulin inhibitor or a mutant RGS4 is applied that can bind to calmodulin but that does not accelerate GTPase activity. Therefore, an increase in intracellular Ca(2+) and the resultant formation of Ca(2+)/calmodulin facilitate GTPase activity of RGS and thus decrease the available channel number on depolarization. These results indicate a novel and probably general pathway that Ca(2+)-dependent signaling regulates the G protein cycle via RGS proteins.
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Affiliation(s)
- M Ishii
- Department of Pharmacology II , Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
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Yamamoto H, Sekine Y, Higashizawa T, Kihira K, Kaneko Y, Hosoya Y, Ido K, Saito K, Sugano K. Successful en bloc resection of a large superficial gastric cancer by using sodium hyaluronate and electrocautery incision forceps. Gastrointest Endosc 2001; 54:629-32. [PMID: 11677485 DOI: 10.1067/mge.2001.118643] [Citation(s) in RCA: 91] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
BACKGROUND The advisability of endoscopic mucosal resection (EMR) for treatment of large superficial gastric cancers has been challenged. For more reliable en bloc resection, a new method of EMR was developed that uses a viscous substance, sodium hyaluronate, and two newly designed devices. METHODS A large superficial gastric cancer was treated with this new EMR technique. Sodium hyaluronate was injected into the submucosa and mucosal incisions were made with a needle-knife. The newly developed incision forceps and flat-ended transparent hood were used for submucosal incisions. RESULTS The large cancer was successfully resected endoscopically as a single piece of mucosa 6 cm in diameter without complication. Histopathologic evaluation of the specimen confirmed that the resection was curative. CONCLUSIONS EMR with sodium hyaluronate along with two new devices may be a reliable method for en bloc resection of large superficial gastric lesions.
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Affiliation(s)
- H Yamamoto
- Department of Gastroenterology, Jichi Medical School, Tochigi, Japan
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Gemma A, Takenaka K, Hosoya Y, Matuda K, Seike M, Kurimoto F, Ono Y, Uematsu K, Takeda Y, Hibino S, Yoshimura A, Shibuya M, Kudoh S. Altered expression of several genes in highly metastatic subpopulations of a human pulmonary adenocarcinoma cell line. Eur J Cancer 2001; 37:1554-61. [PMID: 11506965 DOI: 10.1016/s0959-8049(01)00154-x] [Citation(s) in RCA: 64] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Non-small cell lung cancer is associated with approximately 85% mortality due to its high metastatic potential. Therapeutic efforts have failed to produce a significant improvement in prognosis. In this situation, a better understanding of the key factors of metastasis may be useful for designing new molecular targets of therapy. In order to identify these factors, we compared the expression profiles of two subpopulations of an adenocarcinoma cell line with a high metastatic potential, PC9/f9 and PC9/f14, with the parent cell line, PC9, using a cDNA array. The expression of 15 genes was found to be significantly enhanced or reduced in the highly metastatic subpopulations. The expression of matrix metalloproteinase-2 (MMP-2), plasminogen activator inhibitor-1 (PAI-1) and interleukin-1 (IL-1 alpha) were upregulated in the highly metastatic subpopulations, while the expression of carcinoembryonic antigen (CEA), caspase-5, Fas ligand, Prk/FNK, cyclin E, cyclin B1, Ki-67, proliferating cell nuclear antigen (PCNA), Smad4, macrophage proinflammatory human chemokine-3 alpha (MIP-3 alpha)/LARC, Met and CD44 were downregulated. Data from the literature suggest that the altered expression of MMP-2, PAI-1, IL-1 alpha, CEA, caspase-5, Fas ligand, Prk/FNK and Smad4 promotes the highly metastatic phenotype. The differential expression of these genes was confirmed by Northern blot analysis, standard reverse transcription-polymerase chain reaction (RT-PCR) and real-time quantitative RT-PCR. This analysis in subpopulations of a lung cancer cell line indicated that the highly metastatic potential of lung cancer may be induced not by an alteration in the expression of a single gene, but by the accumulation of alterations in the expression of several genes involved in extracellular matrix (ECM) adhesion disruption, ECM degradation, escape from apoptosis, and resistance to transforming growth factor-beta(1) (TGF-beta(1)). Strategies for inhibiting metastasis of pulmonary adenocarcinoma should be designed accordingly.
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Affiliation(s)
- A Gemma
- Fourth Department of Internal Medicine, Nippon Medical School, 1-1-5, Sendagi, Bunkyo-ku, Tokyo 113-8602, Japan.
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Kurimoto F, Gemma A, Hosoya Y, Seike M, Takenaka K, Uematsu K, Yoshimura A, Shibuya M, Kudoh S. Unchanged frequency of loss of heterozygosity and size of the deleted region at 8p21-23 during metastasis of lung cancer. Int J Mol Med 2001; 8:89-93. [PMID: 11408955 DOI: 10.3892/ijmm.8.1.89] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
The genetic mechanisms involved in lung cancer development and progression are beginning to be understood. Many studies have documented frequent loss of heterozygosity (LOH) at specific chromosomal regions in cancer cells; this implies that tumor suppressor genes (TSG) are usually present in those regions. Recently, it has been reported that LOH or chromosomal deletions at chromosome 8p21-23 represent early events frequently occurring in lung cancer. In addition, the size of these chromosome 8 deletions, as well as their frequency, was also reported to increase during lung cancer progression. To determine the spectrum and frequency of alterations of chromosome 8p21-23 in human lung cancer and whether these increase with progression of the tumors, we performed LOH analysis of chromosome 8p and 3p in the genomic DNA from cells from primary and metastatic sites of lung cancer, as well as from normal lung. We studied 35 subjects with primary lung cancer including 30 tumors with distant metastasis. Detection of allelic deletion utilized a PCR-based approach of microsatellite polymorphism analysis, which was performed using the microsatellite markers D8S1130, D8S1106, D8S511, D8S1827, D8S549, D8S261, LPL, D8S258, D8S136, NEFL, D3S1295, D3S1313, D3S1234, D3S1300, D3S1351, D3S1339, and D3S1340. The overall allelic deletion rates were 10 of 28 (35.7%) at 8p and 13 of 33 (39.4%) at 3p. The allelic deletions in the primary cancer and its metastatic sites were in each case identical in both frequency and size of the deleted regions. In our analysis, 8p21-23 deletions were not always associated with 3p deletions in primary lung cancer. These results therefore suggest that allelic deletion at chromosome 8p21-23 is an early and frequent event in the carcinogenesis and development of lung cancer, independent of chromosome 3p deletion. However, a continuing increase in the frequency of LOH at 8p21-23 and in the size of the deleted region rarely occurs during the process of metastasis.
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Affiliation(s)
- F Kurimoto
- Fourth Department of Internal Medicine, Nippon Medical School, Bunkyo-ku, Tokyo 113-8602, Japan
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Gemma A, Hosoya Y, Seike M, Uematsu K, Kurimoto F, Hibino S, Yoshimura A, Shibuya M, Kudoh S, Emi M. Genomic structure of the human MAD2 gene and mutation analysis in human lung and breast cancers. Lung Cancer 2001; 32:289-95. [PMID: 11390010 DOI: 10.1016/s0169-5002(00)00223-3] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
Some of the many human cancers that exhibit chromosomal instability also carry mutations in mitotic checkpoint genes and/or reveal reduced expression of some of those genes, such as hMAD2. To facilitate investigation of alterations of hMAD2, we determined its genomic structure and intronic primers designed to amplify the entire coding region. Since general impairment of the mitotic checkpoint is frequently reported in lung cancers, and reduced expression of hMAD2 has been reported in breast cancers as well, we searched for mutations throughout the coding sequence of this gene in the genomic DNA of 30 primary lung tumors, 30 lung-cancer cell lines and 48 primary breast cancers. Our approach, which involved polymerase chain reaction-single strand conformation polymorphism (PCR-SSCP) analysis and direct sequencing, revealed nucleotide variants in only two of the 108 specimens. One was a cytosine-to-adenine substitution 3 bp upstream of exon 4 that occurred in one lung cancer cell line and one primary breast tumor, a change that did not alter transcriptional sequence. The other was an adenine-to-guanine substitution within exon 4, of the same lung cell line; this change already had been reported as a polymorphism. The results suggested that the hMAD2 gene is not commonly mutated in either lung nor breast cancers. Further studies should focus on other mechanisms that might account for reduced expression of the hMAD2 gene, and/or pursue analyses of other mitotic checkpoint genes for mutations in human cancer. Nevertheless, the genomic structure, the intronic primer sequences, and polymorphisms of the hMAD2 gene presented here will facilitate future studies to determine the full spectrum and frequency of the genetic events that can affect expression of the hMAD2 gene in human tumors.
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Affiliation(s)
- A Gemma
- Fourth Department of Internal Medicine, Nippon Medical School, 1-1-5, Sendagi, Bunkyo-ku, 113-8602, Tokyo, Japan.
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Abstract
OBJECTIVE This study evaluated the influence of Carisolv (Medi Team) for resin adhesion to sound human primary and young permanent dentin. METHOD The buccal surfaces of 64 primary molars and 74 premolars were used. Two adhesive systems and resin composites were used; SD: Super-Bond D Liner DUAL (Sun Medical) and Clearfil Photo Anterior(Kuraray), and FB: Imperva Fluorobond and Lite-Fil IIA (Shofu). Ten groups were prepared. Groups 1-5 were primary dentin and Groups 6-10 were permanent dentin. Groups 1 and 6: Carisolv applied and agitated for 3min, SD was used. Groups 2 and 7: etched with 10-3 solution (Sun Medical) for 10s, SD was used. Groups 3 and 8: treated with Carisolv and then etched, SD was used. Groups 4 and 9: treated with Carisolv, FB was used. Groups 5 and 10: FB was used. The microstructural effects of Carisolv, 10-3 solution and Carisolv plus 10-3 solution applied to dentin were evaluated by SEM. In addition, the microstructure of the resin-dentin interfaces of each group were studied using SEM. Shear bond strengths (SBS) were tested, and the failed surfaces were observed using SEM. Data was statistically analyzed using ANOVA with subsequent application of post hoc Duncan's new multiple range test at p<0.05. RESULTS The effect of Carisolv on primary dentin was stronger than that to permanent dentin. The mean SBS (unit:MPa) of Groups 1-10 were: 5.6, 15.8, 7.6, 17.5, 13.5, 8.1, 16.2, 18.2, 31.4 and 15.5. The SBS of Group 9 (Carisolv treated permanent dentin) was significantly higher than those of other groups. There was no significant difference of SBS among Groups 2, 4, 5, 7, 8 and 10, Groups 3, 5 and 6, and Groups 1, 3 and 6. SIGNIFICANCE Carisolv treatment before etching significantly decreased the SBS to primary dentin in SD groups, but significantly increased the SBS to permanent dentin in FB groups.
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Affiliation(s)
- Y Hosoya
- Department of Pediatric Dentistry, Nagasaki University School of Dentistry, 1-7-1, Sakamoto, 852-8588, Nagasaki, Japan.
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Hosoya Y, Ikeda K, Komatsu T, Yamaki M, Kubota I. Spectral analysis of epicardial 60-lead electrograms in dogs with 4-week-old myocardial infarction. J Electrocardiol 2001; 34:15-24. [PMID: 11239366 DOI: 10.1054/jelc.2001.22026] [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: 11/18/2022]
Abstract
There were few studies on the spectral analysis of multiple-lead epicardial electrograms in chronic myocardial infarction. Spectral analysis of multi-lead epicardial electrograms was performed in 6 sham-operated dogs (N group) and 8 dogs with 4-week-old myocardial infarction (MI group). Four weeks after the ligation of left anterior descending coronary artery, fast Fourier transform was performed on 60-lead epicardial electrograms, and then inverse transform was performed on 5 frequency ranges from 0 to 250 Hz. From the QRS onset to QRS offset, the time integration of unsigned value of reconstructed waveform was calculated and displayed as AQRS maps. On 0-25 Hz AQRS map, there was no significant difference between the 2 groups. In the frequency ranges of 25-250 Hz, MI group had significantly smaller AQRS values than N group solely in the infarct zone. It was shown that high frequency potentials (25-250 Hz) within QRS complex were reduced in the infarct zone.
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Affiliation(s)
- Y Hosoya
- Department of Nursing, Faculty of Health Science, Yamagata School of Health Science,
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Gemma A, Hosoya Y, Uematsu K, Seike M, Kurimoto F, Yoshimura A, Shibuya M, Kudoh S. Mutation analysis of the gene encoding the human mannose 6-phosphate/insulin-like growth factor 2 receptor (M6P/IGF2R) in human cell lines resistant to growth inhibition by transforming growth factor beta(1) (TGF-beta(1)). Lung Cancer 2000; 30:91-8. [PMID: 11086202 DOI: 10.1016/s0169-5002(00)00130-6] [Citation(s) in RCA: 11] [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: 11/15/2022]
Abstract
The mannose 6-phosphate/insulin-like growth factor 2 receptor (M6P/IGF2R) is involved in activating the transforming growth factor beta(1) (TGF-beta(1)), an inhibitor of the cell proliferation, and limiting the insulin-like growth factor 2 mediated-growth stimulation. The M6P/IGF2R gene has been reported to be mutated and deleted in various cancers, and is a candidate tumor suppressor gene. We studied the genomic structure of the M6P/IGF2R gene and designed the intron primers to detect mutations in the M6P/IGF2R gene of genomic DNA samples. The M6P/IGF2R gene consists of 48 exons. The previously reported 23 mutations of the M6P/IGF2R gene in human cancers, liver, breast, and gastrointestinal tumors, are located in five exons, exon 27, 28, 31, 40, 48. Using the intron primers designed in this study, polymerase chain reaction-single strand conformation polymorphism (PCR-SSCP) analysis, and direct sequencing, we performed an initial analysis of the complete coding sequences of the M6P/IGF2R gene in 21 human cell lines resistant to growth inhibition by TGF-beta(1). An adenine-to-guanine transition, resulting in an asparagine-to-serine amino acid substitution, was found in one lung adenocarcinoma cell line at exon 40 where the mutation has been previously reported in human cancers. This is the first report of a mutation of the M6P/IGF2R gene in lung tumor. These results indicated that the mutation in M6P/IGF2R may be involved in human lung cancinogenesis.
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Affiliation(s)
- A Gemma
- Fourth Department of Internal Medicine, Nippon Medical School, Main Hospital, 1-1-5 Sendagi Bunkyo-ku, Tokyo 113-8602, Japan. gemma_akihiko/
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Imai T, Inoue S, Kuzuhara K, Hosoya Y, Honda M, Takasaki E, Yoshida KI, Manaka K, Nishimura Y, Bekku Y, Tomikawa S, Nagao T, Uchida H. Immunosuppressive effect of bactobolamine on in vitro lymphocyte alloactivation: synergism with cyclosporine. Transplant Proc 2000; 32:2060-2. [PMID: 11120066 DOI: 10.1016/s0041-1345(00)01558-x] [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: 11/28/2022]
Affiliation(s)
- T Imai
- Kidney Center, Toranomon Hospital, Tokyo, Japan
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Seike M, Gemma A, Hosoya Y, Hemmi S, Taniguchi Y, Fukuda Y, Yamanaka N, Kudoh S. Increase in the frequency of p16INK4 gene inactivation by hypermethylation in lung cancer during the process of metastasis and its relation to the status of p53. Clin Cancer Res 2000; 6:4307-13. [PMID: 11106248] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/18/2023]
Abstract
The p16INK4 gene, which is a tumor suppressor gene, is frequently altered in lung cancers. Hypermethylation of the promoter region of the p16INK4 gene seems to be the major mechanism through which p16INK4 become inactivated. Hypermethylation of the p16INK4 gene was reported to occur at an early stage in lung cancer. To determine whether the change in p16INK4 methylation status occurs at the late stage in the progression of primary lung cancers, we analyzed the primary and metastatic tumor tissues and normal lung samples from 29 cases of advanced lung cancer with distant metastasis. In each tissue sample, we analyzed the p16INK4 and p15INK4b genes for mutations and the methylation status of both genes using PCR-single strand conformation polymorphism, direct sequencing, and methylation-specific PCR analysis. We also analyzed a subset of the samples for p16INK4 protein expression. Genetic mutations in the coding region of the p16INK4 and p15INK4b genes were not found in any of the examined specimens. The promoter region of the p16INK4 gene was hypermethylated in the tumor samples of the primary or metastatic site of 37.0% (10 of 27) of the subjects. The promoter region of the p16INK4 gene was hypermethylated at both the primary and metastatic sites in two of the 10 cases and at only the metastatic site in 8 cases. By immunohistochemical analysis, we confirmed the presence of p16INK4 protein at the primary site of all cases in which the promoter region of the p16INK4 gene was hypermethylated at only the metastatic site. Interestingly, all 8 cases with a hypermethylated p16INK4 promoter region, at only the metastatic site, did not have p53 mutation. The results of this study indicate that tumor cells in which the p16INK4 gene has been inactivated by hypermethylation of the promoter region could have an advantage in progression and metastasis in non-small cell lung cancers, especially in the tumors with normal p53, and that the frequency of p16INK4 gene inactivation by hypermethylation could vary in clinical course.
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Affiliation(s)
- M Seike
- Fourth Department of Internal Medicine, Nippon Medical School, Tokyo, Japan
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Sagara A, Yamanishi H, Imagawa S, Muroga T, Uda T, Noda T, Takahashi S, Fukumoto K, Yamamoto T, Matsui H, Kohyama A, Hasizume H, Toda S, Shimizu A, Suzuki A, Hosoya Y, Tanaka S, Terai T, Sze DK, Motojima O. Design and development of the Flibe blanket for helical-type fusion reactor FFHR. Fusion Engineering and Design 2000. [DOI: 10.1016/s0920-3796(00)00360-4] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Gemma A, Hosoya Y, Uematsu K, Seike M, Kurimoto F, Yoshimura A, Shibuya M, Kudoh S. Mechanism of resistance to growth inhibition by transforming growth factor b1 (TGF b1) in lung cancer and new molecular targets in therapy. Lung Cancer 2000. [DOI: 10.1016/s0169-5002(00)80701-1] [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]
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Yoshida S, Kashiwamura SI, Hosoya Y, Luo E, Matsuoka H, Ishii A, Fujimura A, Kobayashi E. Direct immunization of malaria DNA vaccine into the liver by gene gun protects against lethal challenge of Plasmodium berghei sporozoite. Biochem Biophys Res Commun 2000; 271:107-15. [PMID: 10777689 DOI: 10.1006/bbrc.2000.2558] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.2] [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: 11/22/2022]
Abstract
The liver is the first target organ for malaria parasites immediately after the bite of an infected mosquito. We studied local immunization of malaria DNA vaccines at the site of the liver using a gene gun as a useful tool for in vivo transfection of foreign genes. A malaria DNA vaccine consisting of the Plasmodium berghei circumsporozoite protein (PbCSP) gene plus the mouse IL-12 gene was bombarded directly by a gene gun into mouse liver once or into the skin twice. A marked protective effect was induced by gene bombardment into the liver (more than 71%) compared with that into the skin (less than 33%). A Th1-type immune response and high production of iNOS were observed in the hepatic lymphocytes from mice bombarded into the liver, resulting in more effective protection compared with those bombarded into the skin. These results provide an important implication on the development of efficient malaria vaccine strategies.
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Affiliation(s)
- S Yoshida
- Department of Medical Zoology, Center for Molecular Medicine, Jichi Medical School, 3311-1 Yakushiji, Minamikawachimachi, Tochigi, Japan.
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Fukumoto S, Tuneoka A, Kamasaki Y, Hosoya Y, Goto G. Transposition of mesial and distal aspects of maxillary first molars: case report. J Clin Pediatr Dent 2000; 23:265-9. [PMID: 10686874] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/15/2023] Open
Abstract
Congenital absence of one or more teeth, hypodontia, is the most common developmental anomaly and is often accompanied by the presence of other tooth anomalies. In this case two Japanese sisters have several congenitally missing primary and permanent teeth and morphological abnormalities of maxillary first molars. One sister has transposition of mesial and distal aspects of a maxillary first molar, whose cusps display a normal shape. Another sister has maxillary first molars, which look like maxillary second molars. Mesio-distally shift of teeth is a very rare anomaly making this particular case important to analyze the teeth formation and development.
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Affiliation(s)
- S Fukumoto
- Department of Pediatric Dentistry, Nagasaki University, School of Dentistry, Japan
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Hosoya Y, Marshall SJ, Watanabe LG, Marshall GW. Microhardness of carious deciduous dentin. Oper Dent 2000; 25:81-9. [PMID: 11203804] [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] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/19/2023]
Abstract
The purpose of this study was to measure the microhardness values of deciduous dentin and to compare the values as a function of position in the caries-affected layers of dentin including transparent, adjacent sound dentin, and dentin regions far from and not related to caries. Seven extracted or exfoliated deciduous anterior teeth that had dentin caries on a proximal surface were sectioned parallel to the long axis of the tooth. Ten sectioned and polished specimens were dehydrated and dried. Microhardness was measured with a Knoop indenter and correlated with wet-SEM micrographs. All data were statistically analyzed using a two-way ANOVA with subsequent Tukey-Kramer multiple comparison tests at p < 0.05. The hardness decreased from the dentinoenamel junction to the pulp chamber wall, except for the region under the caries. The hardness values of the region under the caries were significantly lower than those of other regions except for the inner region. For both the carious and sound sides, the hardness values of the inner region were significantly lower than those of the outer and middle regions. In comparing the hardness among regions in the carious and sound sides, the hardness of the outer, middle, and inner regions on the carious side was significantly lower than those in the sound side.
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Affiliation(s)
- Y Hosoya
- Nagasaki University School of Dentistry, Department of Pediatric Dentistry, 1-7-1, Sakamoto, Nagasaki, 852-8588, Japan
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Hosoya Y, Kawashita Y, Yoshida M, Suefuji C, Marshall GW. Fluoridated light-activated bonding resin adhesion to enamel and dentin: primary vs. permanent. Pediatr Dent 2000; 22:101-6. [PMID: 10769853] [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
PURPOSE This study compared fluoridated bonding resin adhesion to primary enamel (Group 1), primary dentin (Group 2), permanent enamel (Group 3), and permanent dentin (Group 4). METHODS The buccal surfaces of 24 primary molars and 24 premolars were used. The bonding system and resin composite used in this study were Imperva Fluorobond and Lite-Fil IIA (Shofu Inc., Kyoto, Japan). Effects of tooth surface conditioning by FB primer were observed using SEM (N = 2/group). Shear bond strengths (SBS) were tested, and the test surfaces of enamel, dentin, and resin specimens were observed using SEM (N = 10/group). Data was statistically analyzed using one-way ANOVA with subsequent post hoc Duncan's new multiple range test at P < 0.05. RESULTS Effects of tooth surface conditioning by FB primer were appropriate to dentin but low to enamel. Means and standard deviations of the SBS for each group were: Group 1 (16.34, 5.53 MPa), Group 2 (15.06, 7.02 MPa), Group 3 (14.39, 6.52 MPa) and Group 4 (15.45, 5.35 MPa). There was no significant difference of SBS among Groups 1, 2, 3, and 4. CONCLUSION Imperva Fluorobond system gave the same level of bond strength to primary enamel, primary dentin, permanent enamel, and permanent dentin.
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Affiliation(s)
- Y Hosoya
- Department of Pediatric Dentistry, Nagasaki University School of Dentistry, Japan
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Hosoya Y, Fujii T, Nagai H, Shibusawa H, Tsukahara M, Kanazawa K. A case of multiple gastric carcinoids associated with multiple endocrine neoplasia type 1 without hypergastrinemia. Gastrointest Endosc 1999; 50:692-5. [PMID: 10536330 DOI: 10.1016/s0016-5107(99)80023-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Y Hosoya
- Department of Surgery, Jichi Medical School, Tochigi, Japan
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41
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Fujii T, Kawai T, Saito K, Hishima T, Hayashi Y, Imura J, Hironaka M, Hosoya Y, Koike M, Fukayama M. MEN1 gene mutations in sporadic neuroendocrine tumors of foregut derivation. Pathol Int 1999; 49:968-73. [PMID: 10594843 DOI: 10.1046/j.1440-1827.1999.00971.x] [Citation(s) in RCA: 23] [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] [Indexed: 11/20/2022]
Abstract
Foregut-derived neuroendocrine (NE) tumors occur sporadically or in association with multiple endocrine neoplasia type 1 (MEN1) syndrome. Thirty-nine sporadic NE tumors of foregut derivation (six thymic, 21 bronchial, three gastric, and nine pancreatic tumors) as well as two hindgut-derived rectal carcinoids for somatic MEN1 gene mutation were analyzed by direct sequencing analysis. Five tumors showed mutations: nonsense mutations (Q393X and R98X) in thymic and pancreatic NE tumors, respectively, a 4 b.p. deletion (357del4) in a gastric NE carcinoma, and missense mutations (D172Y and S178Y) in pancreatic NE tumors. No mutation was identified in pulmonary or rectal NE tumors. In a patient with a pancreatic NE tumor (D172Y), the corresponding germline DNA showed the same mutation, suggesting that sporadic MEN1 syndrome was masked in this case. Somatic MEN1 gene mutations and deletions may play a crucial role in the tumorigenesis of a subset of foregut-derived NE tumors. Sporadic MEN1 syndrome may occur as a sporadic NE tumor of the pancreas.
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Affiliation(s)
- T Fujii
- Department of Pathology, Jichi Medical School, Minamikawachi, Kawachi, Tochigi, Japan.
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42
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Kitahara S, Umeda H, Yano M, Koga F, Sumi S, Moriguchi H, Hosoya Y, Honda M, Yoshida K. Effects of intravenous administration of high dose-diethylstilbestrol diphosphate on serum hormonal levels in patients with hormone-refractory prostate cancer. Endocr J 1999; 46:659-64. [PMID: 10670751 DOI: 10.1507/endocrj.46.659] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
The objective of this study was to elucidate the mechanism underlying the further suppression of serum testosterone (T) by diethylstilbestrol diphosphate (DES-DP) in patients with prostate cancer refractory to hormonal treatment. These patients received an LHRH agonist with or without a non-steroidal androgen-receptor blocker or a gestagen before DES-DP. We measured serum levels of total and free T, dihydrotestosterone (DHT), estradiol (E2), dehydroepiandrosterone sulfate (DHEA-S), dehydroepiandrosterone (DHEA), androstenedione, cortisol, aldosterone before and during intravenous administration of high doses of DES-DP (500 or 1000 mg/day). DES-DP administration suppressed the serum levels of FSH (p=0.04) and total T (p=0.02), and eliminated free T (p=0.04) and E2 (p=0.04) from serum, while reducing serum DHEA-S to approximately two-thirds of the pretreatment level (p=0.03). In contrast, serum levels of SHBG (p=0.02) and cortisol (p=0.02) were markedly increased after DES-DP administration. The latter had no significant effect on serum levels of LH, DHT, ACTH, 17alpha-hydroxypregnenolone, 17alpha-hydroxyprogesterone, DHEA, androstenedione, or aldosterone. The results suggest that the potent suppression of circulating total T by DES-DP is caused, in part, by the inhibitory effect of DES-DP on serum DHEA-S level. In most patients, high-dose DES-DP treatment completely suppressed the serum level of free T, while possibly elevating serum SHBG and decreasing serum total T. The mechanisms that maintain the serum level of serum DHT during DES-DP treatment require further elucidation.
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Affiliation(s)
- S Kitahara
- Department of Urology, Dokkyo University School of Medicine, Mibu, Tochigi, Japan
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43
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Hosoya Y, Shibusawa H, Nagai H, Ueno I, Sakuma K, Nagashima T, Kobayashi N, Kanazawa K. Preoperative chemotherapy for advanced esophageal cancer and relation with histological effect. Surg Today 1999; 29:689-94. [PMID: 10483740 DOI: 10.1007/bf02482310] [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: 11/24/2022]
Abstract
The results of surgical treatment for advanced esophageal cancer remain extremely poor. Irradiation and chemotherapy are not superior to surgery. Perioperative morbidity and the influence on long-term survival of a combination of surgery and preoperative chemotherapy were investigated in patients with advanced esophageal cancer. Forty-nine patients with advanced esophageal squamous cell carcinoma were subjected to preoperative chemotherapy of cisplatin-5-fluorouracil. Fifty-seven patients were chosen as a historical control group who had not undergone chemotherapy before surgery but had the same histological stages as the chemotherapy group. The response to chemotherapy was assessed by histological studies of surgical specimens. The survival rates noted no significant difference between preoperative chemotherapy plus surgery and a resection alone. However, subclassification according to the grading of chemotherapeutic effectiveness showed that, compared with control, preoperative chemotherapy was beneficial to high responders (P = 0.01), ineffective in low responders (P = 0.61), and detrimental to nonresponders (P = 0.03). Postoperative morbidity was significantly higher in the chemotherapy group than in the control group (P = 0.02). These findings suggest that preoperative chemotherapy is necessary only for high responders and we therefore need to reliably identify non-, low, and high responders before chemotherapy to improve the survival and quality of life of patients with advanced esophageal cancer.
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Affiliation(s)
- Y Hosoya
- Department of Surgery, Jichi Medical School, Tochigi, Japan
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44
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Hosoya Y, Gemma A, Seike M, Kurimoto F, Uematsu K, Hibino S, Yoshimura A, Shibuya M, Kudoh S. Alteration of the PTEN/MMAC1 gene locus in primary lung cancer with distant metastasis. Lung Cancer 1999; 25:87-93. [PMID: 10470842 DOI: 10.1016/s0169-5002(99)00052-5] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The PTEN/MMAC1 gene located at 10q23, has been proposed to be a tumor suppressor gene. To determine the involvement of alteration of the PTEN/MMAC1 gene in carcinogenesis and the progression of primary lung cancers, we analyzed tumor samples of primary and distant metastatic sites and normal lung tissue samples of 30 patients with advanced lung cancer with distant metastasis. The tissues were analyzed for allelic deletion and mutational inactivation of PTEN/MMAC1 by loss of heterozygosity (LOH) analysis, polymerase chain reaction-single strand conformation polymorphism (PCR-SSCP), and direct sequence analysis. LOH of the PTEN/MMAC1 locus was common in each histologic type of primary lung cancer. In this study, the overall allelic deletion rate was 33.3% (7/21). Allelic loss at the primary site and that at the metastatic site of each patient, were identical; in most cases, it seemed that the allelic loss had occurred before metastasis. Sequence analysis of the PTEN/MMAC1 gene revealed a G to C substitution located 8 bp upstream of the coding region of exon 1 and which seems to be a polymorphism, in 4 of the 30 cases. Somatic mutations of the PTEN/MMAC1 gene were not identified in any of the tumors at the primary and metastatic sites. These data indicate that point mutations in the PTEN/MMAC1 gene are probably not an important factor in tumorigenesis and the progression of a major subset of lung cancers. Due to frequent allelic loss at the PTEN/MMAC1 locus occurring at a stage earlier than the metastatic process, alternative mechanisms in which the remaining allele is inactivated such as methylation or homozygous deletion of a small region of the gene that can not be detected by the usual analysis, or alteration of other important tumor suppressor genes lying close to the PTEN/MMAC1 gene on 10q23, may be involved in the tumorigenesis of lung cancers of all histologic subtypes.
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Affiliation(s)
- Y Hosoya
- Fourth Department of Internal Medicine, Nippon Medical School, Tokyo, Japan
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Abstract
OBJECTIVES The purpose of this study was to investigate the influence of light-curing times on the color changes of light-cured resin composites, over specified periods of time. METHODS Silux Plus (3M Dental Products) light-cured resin composite disks (shades: U, Y, DY, L, G, UO, YO), 10 mm in diameter and 1 mm in thickness were prepared with 20, 40, and 120 s of light exposure through a 1 mm thick glass plate. The specimens were stored in artificial saliva at 37 degrees C. Colorimetric values of the specimens immediately after curing and after every 6 months for 5 years were measured backed by a light trap, and a white colored plate using a fast spectrophotometer. The CIE 1976 L*a*b* color system was used for the determination of the color difference. RESULTS For specimens backed by a white colored plate, the delta E*ab of all shades increased for 3 years and 6 months to 5 years, to the time elapsed during all curing times. However, the a*b* values to the time elapsed differed among the shades and light curing times. In the 20 and 120 s curing time groups, the opacity% of all shades increased for 4 or 5 years to the time elapsed. SIGNIFICANCE The modes of color changes of Silux Plus resins differed among the shades and light curing times.
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Affiliation(s)
- Y Hosoya
- Department of Pediatric Dentistry, Nagasaki University School of Dentistry, Japan.
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46
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Hosoya Y, Kitoh Y, Kobayashi E, Okabe R, Fujimura A, Kanazawa K. Combination effects of tamoxifen plus 5-fluorouracil on gastric cancer cell lines in vitro. Cancer Lett 1999; 140:139-43. [PMID: 10403552 DOI: 10.1016/s0304-3835(99)00059-2] [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: 11/22/2022]
Abstract
We tested the effect of tamoxifen alone and tamoxifen plus 5-fluorouracil (5-FU) on proliferation of two different types of gastric cancer cell lines using the WST-1 method. A high dose of tamoxifen suppressed the proliferation of KATOIII cells (poorly differentiated adenocarcinoma), but MKN28 cells (well-differentiated adenocarcinoma) were not affected. The combination of the two drugs resulted in a synergistic anti-proliferative activity on KATOIII cells. On the other hand, in the combination therapy, tamoxifen stimulated MKN28 cells to proliferate in a dose-dependent manner. TGF-beta1 secretion was not changed in KATOIII cells by tamoxifen plus 5-FU treatment but was down-regulated in MKN28 cells. Both cancer cell lines were judged as intracellular estrogen receptor (ER) negative. These data suggest that the anti-proliferative effects of tamoxifen plus 5-FU on KATOIII cells were not dependent on ER expression or TGF-beta1 secretion. On the other hand, their proliferative effects on MKN28 cells might be, in part, caused by the reduced secretion of TGF-beta1.
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Affiliation(s)
- Y Hosoya
- Department of Clinical Pharmacology, Jichi Medical School, Kawachi, Tochigi, Japan
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Abstract
Orexin (ORX)-A and -B are recently identified neuropeptides, which are specifically localized in neurons within and around the lateral hypothalamic area (LHA) and dorsomedial hypothalamic nucleus (DMH), the regions classically implicated in feeding behavior. Here, we report a further study of the distribution of ORX-containing neurons in the adult rat brain to provide a general overview of the ORX neuronal system. Immunohistochemical study using anti-ORX antiserum showed ORX-immunoreactive (ir) neurons specifically localized within the hypothalamus, including the perifornical nucleus, LHA, DMH, and posterior hypothalamic area. ORX-ir axons and their varicose terminals showed a widespread distribution throughout the adult rat brain. ORX-ir nerve terminals were observed throughout the hypothalamus, including the arcuate nucleus and paraventricular hypothalamic nucleus, regions implicated in the regulation of feeding behavior. We also observed strong staining of ORX-ir varicose terminals in areas outside the hypothalamus, including the cerebral cortex, medial groups of the thalamus, circumventricular organs (subfornical organ and area postrema), limbic system (hippocampus, amygdala, and indusium griseum), and brain stem (locus coeruleus and raphe nuclei). These results indicate that the ORX system provides a link between the hypothalamus and other brain regions, and that ORX-containing LHA and DMH neurons play important roles in integrating the complex physiology underlying feeding behavior.
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Affiliation(s)
- T Nambu
- Institute of Basic Medical Sciences, University of Tsukuba, 1-1, Tennohdai, Tsukuba, Tsukuba, Ibaraki 305-8575, Japan
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48
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Ohashi Y, Chijiiwa Y, Suzuki K, Takahashi K, Nanamiya H, Sato T, Hosoya Y, Ochi K, Kawamura F. The lethal effect of a benzamide derivative, 3-methoxybenzamide, can be suppressed by mutations within a cell division gene, ftsZ, in Bacillus subtilis. J Bacteriol 1999; 181:1348-51. [PMID: 9973366 PMCID: PMC93517 DOI: 10.1128/jb.181.4.1348-1351.1999] [Citation(s) in RCA: 65] [Impact Index Per Article: 2.6] [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: 11/20/2022] Open
Abstract
3-Methoxybenzamide (3-MBA), which is known to be an inhibitor of ADP-ribosyltransferase, inhibits cell division in Bacillus subtilis, leading to filamentation and eventually lysis of cells. Our genetic analysis of 3-MBA-resistant mutants indicated that the primary target of the drug is the cell division system involving FtsZ function during both vegetative growth and sporulation.
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Affiliation(s)
- Y Ohashi
- Laboratory of Molecular Genetics, College of Science, Rikkyo (St. Paul's) University, Toshima-ku, Tokyo 171-8501, Japan
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Hosoya Y, Tominaga A. A comparison of five adhesive systems to primary enamel. Pediatr Dent 1999; 21:46-52. [PMID: 10029967] [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: 02/10/2023]
Abstract
PURPOSE This study compared resin adhesion of five adhesive systems to primary enamel. METHODS The labial surfaces of 115 bovine mandibular primary incisors and five different adhesive systems were used. Effects of tooth surface conditioners were observed using SEM. Shear bond strengths were tested, and the test surfaces of enamel and resin specimens were observed using SEM. RESULTS All-Etch, 10-3 solution, and K-etchant were effective tooth surface conditioners. In the nonthermocycled groups, the bond strengths of Superbond D Liner, All Bond 2, and Scotchbond Multi Purpose adhesive systems were significantly higher than those of Ketchant/Clearfil Photo Bond, and Clearfil Liner Bond adhesive systems (P < 0.01). However, in the thermocycled groups, no significant difference was obtained among the adhesive systems for bond strength. No correlation was found between the enamel-resin fracture mode and bond strength for any of the adhesive systems. CONCLUSIONS We disagree with the theory that the use of the latest developed adhesive resin systems significantly enhance bonding of resin to primary enamel.
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Affiliation(s)
- Y Hosoya
- Department of Pediatric Dentistry, Nagasaki University School of Dentistry, Japan
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50
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Hosoya Y, García-Godoy F. Bonding mechanism of Ketac-Molar Aplicap and Fuji IX GP to enamel and dentin. Am J Dent 1998; 11:235-9. [PMID: 10388383] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/13/2023]
Abstract
PURPOSE To evaluate the bonding mechanism to enamel and dentin of two chemically-cured restorative glass ionomer cements (GICs). MATERIALS AND METHODS Buccal surfaces of six caries-free premolars stored in a 1% chloramine solution were ground and then polished with 600 grit SiC paper to expose both enamel and dentin. Ketac-Molar Aplicap (after conditioned with Ketac-Conditioner) or Fuji IX GP (after conditioned with Cavity Conditioner) was applied on the enamel and dentin according to the manufacturers' instructions. Ketac-Molar Aplicap was coated with Ketac-Glaze and Fuji IX GP with GC Fuji Varnish. After 24-hr immersion in water, all teeth were sectioned bucco-lingually in the center of the bonded surface. Bonded interfaces of one of the halves of the sectioned specimens were etched with 35% phosphoric acid gel for 10 s and then soaked in 5% sodium hypochlorite solution for 5 min. All specimens were dehydrated with ethyl alcohol and dried with HMDS. Bonding interfaces were coated with gold-palladium and observed under the SEM. RESULTS For both Ketac-Molar Aplicap and Fuji IX GP, an intimate adaptation between the material and the enamel was observed. Both materials bonded to dentin without gap formation. For both Ketac-Molar Aplicap and Fuji IX GP, neither resin tags nor hybrid layer was observed in any specimen.
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Affiliation(s)
- Y Hosoya
- Department of Pediatric Dentistry, Nagasaki University School of Dentistry, Japan
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