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Mieno Y, Hayashi M, Hirochi M, Ikeda A, Kako H, Ina T, Maeda Y, Maeda S, Inoue T, Souma T, Watanabe T, Horiguchi T, Gotoh Y, Niwa Y, Yamatsuta K, Morikawa S, Sakakibara Y, Okamura T, Uozu S, Goto Y, Isogai S, Fujita S, Fukumoto J, Hosoda N, Imaizumi K. Availability of Home sleep apnea test equipment LS-140 on a comparison with Polysomnography. Fujita Med J 2022; 8:17-24. [PMID: 35233343 PMCID: PMC8874914 DOI: 10.20407/fmj.2020-014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/02/2020] [Accepted: 10/30/2020] [Indexed: 11/18/2022]
Abstract
OBJECTIVE The prevalence of obstructive sleep apnea (OSA) in Japan is 9% among males and 3% among females. Up to 2.5 million patients are estimated to suffer from the disease, but limited number of facilities are capable of carrying out polysomnography (PSG), leaving more than 80% of these individuals are undiagnosed. In recent years, the development of new portable sleep monitoring (PMs) devices has been remarkable. We evaluate the correlation between the results of the LS-140 PMs device (Fukuda Denshi Tech Co. Ltd.), released in 2017, and those of PSG. METHODS We obtained contemporaneous data from the same patients by equipping 58 patients with PMs (LS-140) devices while they underwent PSG. Our primary outcome was Case 2 of the intraclass correlation coefficient (ICC), i.e., the ICC (2.1). And we used a Bland-Altman analysis to compare the apnea-hypopnea index (AHI) given by PSG and the respiratory event index (REI) given by LS-140 and examined the sensitivity and specificity of the REI relative to the AHI in the diagnosis of OSA. We also carried out the same comparison but in terms of the presence or absence of periodic limb movements (PLMs). RESULTS The ICC (2.1) between The REI and the AHI was 0.944, a rather high value (p<0.0001). The mean difference between AHI and REI values was -3.6 (p<0.0001), indicating a negative fixed bias. Sensitivity may decrease in groups with PLMs. CONCLUSION The REI and the AHI are highly correlated, giving LS-140 sufficient diagnostic sensitivity and specificity to screen for OSA.
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Affiliation(s)
- Yuki Mieno
- Department of Respiratory Medicine Ⅰ, Fujita Health University, School of Medicine, Toyoake, Aichi, Japan
| | - Masamichi Hayashi
- Fujita Health University Okazaki Medical Center, Okazaki, Aichi, Japan
| | - Mariko Hirochi
- Department of Respiratory Medicine Ⅰ, Fujita Health University, School of Medicine, Toyoake, Aichi, Japan
| | - Aki Ikeda
- Department of Respiratory Medicine Ⅰ, Fujita Health University, School of Medicine, Toyoake, Aichi, Japan
| | - Hisashi Kako
- Department of Respiratory Medicine Ⅰ, Fujita Health University, School of Medicine, Toyoake, Aichi, Japan
| | - Takuma Ina
- Department of Respiratory Medicine Ⅰ, Fujita Health University, School of Medicine, Toyoake, Aichi, Japan
| | - Yuri Maeda
- Department of Respiratory Medicine Ⅰ, Fujita Health University, School of Medicine, Toyoake, Aichi, Japan
| | - Shingo Maeda
- Department of Respiratory Medicine Ⅰ, Fujita Health University, School of Medicine, Toyoake, Aichi, Japan
| | - Takahiro Inoue
- Department of Respiratory Medicine Ⅰ, Fujita Health University, School of Medicine, Toyoake, Aichi, Japan
| | - Tomohide Souma
- Department of Respiratory Medicine Ⅰ, Fujita Health University, School of Medicine, Toyoake, Aichi, Japan
| | - Toshikazu Watanabe
- Department of Respiratory Medicine Ⅰ, Fujita Health University, School of Medicine, Toyoake, Aichi, Japan
| | - Tomoya Horiguchi
- Department of Respiratory Medicine Ⅰ, Fujita Health University, School of Medicine, Toyoake, Aichi, Japan
| | - Yusuke Gotoh
- Fujita Health University Okazaki Medical Center, Okazaki, Aichi, Japan
| | - Yoshikazu Niwa
- Department of Respiratory Medicine Ⅰ, Fujita Health University, School of Medicine, Toyoake, Aichi, Japan
| | - Kumiko Yamatsuta
- Department of Respiratory Medicine Ⅰ, Fujita Health University, School of Medicine, Toyoake, Aichi, Japan
| | - Sayako Morikawa
- Fujita Health University Okazaki Medical Center, Okazaki, Aichi, Japan
| | - Yosuke Sakakibara
- Department of Respiratory Medicine Ⅰ, Fujita Health University, School of Medicine, Toyoake, Aichi, Japan
| | - Takuya Okamura
- Department of Respiratory Medicine Ⅰ, Fujita Health University, School of Medicine, Toyoake, Aichi, Japan
| | - Sakurako Uozu
- Department of Respiratory Medicine Ⅰ, Fujita Health University, School of Medicine, Toyoake, Aichi, Japan
| | - Yasuhiro Goto
- Department of Respiratory Medicine Ⅰ, Fujita Health University, School of Medicine, Toyoake, Aichi, Japan
| | - Sumito Isogai
- Department of Respiratory Medicine Ⅰ, Fujita Health University, School of Medicine, Toyoake, Aichi, Japan
| | - Shiho Fujita
- Fujita Health University Clinical Laboratory Center, Toyoake, Aichi, Japan
| | - Junichi Fukumoto
- Fujita Health University Clinical Laboratory Center, Toyoake, Aichi, Japan
| | - Nami Hosoda
- Fujita Health University Clinical Laboratory Center, Toyoake, Aichi, Japan
| | - Kazuyoshi Imaizumi
- Department of Respiratory Medicine Ⅰ, Fujita Health University, School of Medicine, Toyoake, Aichi, Japan
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Horiguchi T, Toyama Y, Sakakibara Y, Ikeda A, Kako H, Ina T, Okamura T, Uozu S, Goto Y, Yokoi K, Imaizumi K. Budd-Chiari syndrome caused by latent hepatic metastasis from a thymoma. Respir Med Case Rep 2021; 34:101492. [PMID: 34401316 PMCID: PMC8353463 DOI: 10.1016/j.rmcr.2021.101492] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2021] [Revised: 07/09/2021] [Accepted: 08/02/2021] [Indexed: 10/26/2022] Open
Abstract
A 34-year-old woman visited our hospital because she had had abdominal bloating for 2 months. She had been diagnosed with invasive thymoma (WHO pathological type B2), for which she had undergone chemotherapy and total thymectomy 10 years previously. Six years previously, pleural dissemination was diagnosed and she had undergone right extra-pleural pneumonectomy. On presentation to our hospital, abdominal computed tomography and ultrasound scans revealed abundant ascites and a huge liver lesion, likely a metastasis from her thymoma, obstructing the inferior vena cava. The serum-ascites albumin gradient was high at 1.4 g/dL, which indicated portal hypertension. We diagnosed Budd-Chiari syndrome caused by liver metastasis from a previous thymoma. Steroid therapy resulted in shrinkage of her liver tumor and a marked decrease in her ascites. Although rare, Budd-Chiari syndrome caused by liver metastasis from a thymoma is a possible serious complication of advanced invasive thymoma.
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Affiliation(s)
- Tomoya Horiguchi
- Department of Respiratory Medicine, Fujita Health University School of Medicine, Toyoake, Aichi, Japan
| | - Yoko Toyama
- Department of Respiratory Medicine, Fujita Health University School of Medicine, Toyoake, Aichi, Japan
| | - Yosuke Sakakibara
- Department of Respiratory Medicine, Fujita Health University School of Medicine, Toyoake, Aichi, Japan
| | - Aki Ikeda
- Department of Respiratory Medicine, Fujita Health University School of Medicine, Toyoake, Aichi, Japan
| | - Hisashi Kako
- Department of Respiratory Medicine, Fujita Health University School of Medicine, Toyoake, Aichi, Japan
| | - Takuma Ina
- Department of Respiratory Medicine, Fujita Health University School of Medicine, Toyoake, Aichi, Japan
| | - Takuya Okamura
- Department of Respiratory Medicine, Fujita Health University School of Medicine, Toyoake, Aichi, Japan
| | - Sakurako Uozu
- Department of Respiratory Medicine, Fujita Health University School of Medicine, Toyoake, Aichi, Japan
| | - Yasuhiro Goto
- Department of Respiratory Medicine, Fujita Health University School of Medicine, Toyoake, Aichi, Japan
| | - Kohei Yokoi
- Department of Thoracic Surgery, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Kazuyoshi Imaizumi
- Department of Respiratory Medicine, Fujita Health University School of Medicine, Toyoake, Aichi, Japan
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Akao K, Minezawa T, Yamamoto N, Okamura T, Inoue T, Yamatsuta K, Uozu S, Goto Y, Hayashi M, Isogai S, Kondo M, Imaizumi K. Flow cytometric analysis of lymphocyte profiles in mediastinal lymphadenopathy of sarcoidosis. PLoS One 2018; 13:e0206972. [PMID: 30452447 PMCID: PMC6242308 DOI: 10.1371/journal.pone.0206972] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2018] [Accepted: 10/23/2018] [Indexed: 12/25/2022] Open
Abstract
Lymphocyte profiles in mediastinal lymph nodes may reflect the immune status of patients with sarcoidosis. Endobronchial ultrasound-guided transbronchial needle aspiration (EBUS-TBNA) is useful for the diagnosis of diseases with mediastinal lymphadenopathy including sarcoidosis. The purpose of this study was to determine lymphocyte profiles of lymph nodes in sarcoidosis by analyzing EBUS-TBNA samples. We prepared single cell suspensions from EBUS-TBNA samples of mediastinal lymph nodes from patients with sarcoidosis or lung cancer and analyzed surface markers (CD3, CD4, CD8, CD19, CD25) and FoxP3 expression in the resultant lymphocytes using flow cytometry. We studied 26 patients with sarcoidosis and 16 with lung cancer with mediastinal lymph node metastases. In sarcoidosis, the CD4/CD8 ratio was significantly more elevated in lymph nodes than in bronchoalveolar lavage fluid (P<0.001), although both were strongly correlated. The CD4/CD8 ratio was significantly higher in stage I than in stage II both in the BAL fluid and lymph nodes. When compared with lung cancer lymph node metastasis, the CD4/CD8 ratio was significantly higher in sarcoidosis, whereas the CD3/CD19 ratio was significantly higher in lung cancer. The proportion of regulatory T cells (CD4+, CD25+, FoxP3 high) did not differ between sarcoidosis and lung cancer samples. Lymphocyte profiles in mediastinal lymphadenopathy can be analyzed by flow cytometry of EBUS-TBNA samples. These findings might help elucidate the immunopathology of sarcoidosis.
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Affiliation(s)
- Ken Akao
- Department of Respiratory Medicine, Fujita Health University School of Medicine, Toyoake, Aichi, Japan
| | - Tomoyuki Minezawa
- Department of Respiratory Medicine, Fujita Health University School of Medicine, Toyoake, Aichi, Japan
| | - Naoki Yamamoto
- Regenerative Medicine Support Promotion Facility, Center for Research Promotion and Support, Fujita Health University, Toyoake, Aichi, Japan
| | - Takuya Okamura
- Department of Respiratory Medicine, Fujita Health University School of Medicine, Toyoake, Aichi, Japan
| | - Takahiro Inoue
- Department of Respiratory Medicine, Fujita Health University School of Medicine, Toyoake, Aichi, Japan
| | - Kumiko Yamatsuta
- Department of Respiratory Medicine, Fujita Health University School of Medicine, Toyoake, Aichi, Japan
| | - Sakurako Uozu
- Department of Respiratory Medicine, Fujita Health University School of Medicine, Toyoake, Aichi, Japan
| | - Yasuhiro Goto
- Department of Respiratory Medicine, Fujita Health University School of Medicine, Toyoake, Aichi, Japan
| | - Masamichi Hayashi
- Department of Respiratory Medicine, Fujita Health University School of Medicine, Toyoake, Aichi, Japan
| | - Sumito Isogai
- Department of Respiratory Medicine, Fujita Health University School of Medicine, Toyoake, Aichi, Japan
| | - Masashi Kondo
- Department of Respiratory Medicine, Fujita Health University School of Medicine, Toyoake, Aichi, Japan
| | - Kazuyoshi Imaizumi
- Department of Respiratory Medicine, Fujita Health University School of Medicine, Toyoake, Aichi, Japan
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Abstract
Objective Sleep apnea syndrome is more prevalent among men than women and is frequently accompanied by metabolic syndrome (MetS). However, gender differences in the effect of sleep-disordered breathing (SDB) leading to the risk of MetS remain unclear. The aim of our study was to investigate the clinical characteristics of SDB in women and the differential influence of SDB on MetS between genders. Methods In a single-center retrospective study, we compared the data of 1,809 consecutive SDB patients by gender to clarify the characteristics of sleep disorders in women. We also compared the prevalence of MetS and its related abnormalities by gender. A logistic regression analysis was used to determine the contributory factors for MetS. Results The mean age and proportion of patients over 50 years of age were higher in women than in men. SDB was milder in women than in men according to polysomnography findings. Elevated Hemoglobin A1c levels and hyperlipidemia were less frequent in women than in men. The MetS prevalence was similar in women and men (30.0% vs. 35.2%). A logistic regression analysis showed that the apnea-hypopnea index (AHI) was an independent risk factor for MetS in both genders, but that female gender was independently associated with a decreased prevalence of MetS and its related abnormalities. Conclusion Female SDB patients tend to be older with milder apnea and sleepiness than male SDB patients. A higher AHI is a significant risk factor for MetS in both genders, although female gender is an independent inhibitory factor for developing MetS in SDB patients.
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Affiliation(s)
- Yuki Mieno
- Department of Respiratory Medicine, Fujita Health University, Japan
| | | | | | | | - Shiho Fujita
- Department of Laboratory Medicine, Fujita Health University, Japan
| | - Sumito Isogai
- Department of Respiratory Medicine, Fujita Health University, Japan
| | - Yasuhiro Goto
- Department of Respiratory Medicine, Fujita Health University, Japan
| | - Sakurako Uozu
- Department of Respiratory Medicine, Fujita Health University, Japan
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Uozu S, Imaizumi K, Yamaguchi T, Goto Y, Kawada K, Minezawa T, Okamura T, Akao K, Hayashi M, Isogai S, Okazawa M, Hashimoto N, Hasegawa Y. Feasibility of tissue re-biopsy in non-small cell lung cancers resistant to previous epidermal growth factor receptor tyrosine kinase inhibitor therapies. BMC Pulm Med 2017; 17:175. [PMID: 29212495 PMCID: PMC5719748 DOI: 10.1186/s12890-017-0514-3] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2017] [Accepted: 11/21/2017] [Indexed: 01/04/2023] Open
Abstract
Background When epidermal growth factor receptor (EGFR) gene mutation-positive non-small cell lung cancer (NSCLC) acquires resistance to the initial tyrosine kinase inhibitor (TKI) treatment, reassessing the tumor DNA by re-biopsy is essential for further treatment selection. However, the process of TKI-sensitive tumor re-progression and whether re-biopsy is possible in all cases of acquired resistance to EGFR-TKI remain unclear. Methods We retrospectively analyzed data from 69 consecutive patients with EGFR gene mutation-positive advanced NSCLC who had been treated with EGFR-TKI and exhibited disease relapse after initial disease remission. The relapsing lesions were identified at the time of RECIST-progressive disease (PD) and clinical-PD (when the attending physician judged the patient as clinically relapsing and stopped EGFR-TKI therapy). We determined the potential re-biopsy methods for each relapsing lesion and evaluated their feasibility according to difficulty and invasiveness criteria as follows: category A, accessible by conventional biopsy techniques; category B, difficult (but possible) to biopsy and accessible with invasive methods; and category C, extremely difficult to biopsy or inaccessible without using highly invasive methods, including surgical biopsy. Results The total feasibility rate of re-biopsy (category A or B) was 68% at RECIST-PD and 84% at clinical-PD, and the most common accessible relapsing lesions were primary tumors at RECIST-PD and pleural effusion at clinical-PD. All relapsing lesions at primary sites (categories A and B) were assessed as having the potential for re-biopsy. However, re-biopsy for metastasis was assessed as difficult in a substantial proportion of the study population (42 and 20% category C at RECIST-PD and clinical-PD, respectively). Conclusions Re-biopsy of relapsing disease is feasible in many cases, although it may present difficulties in cases with, e.g., metastatic relapsing lesions. To facilitate treatment strategies in NSCLC patients with relapse after EGFR-TKI therapy, re-biopsy should be standardized with the use of simpler and more reliable methods.
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Affiliation(s)
- Sakurako Uozu
- Department of Respiratory Medicine, Fujita Health University School of Medicine, 1-98 Dengakugakubo, Kutsukake-cho, Toyoake, Aichi, 470-1192, Japan.,Department of Respiratory Medicine, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya, Aichi, 466-8560, Japan
| | - Kazuyoshi Imaizumi
- Department of Respiratory Medicine, Fujita Health University School of Medicine, 1-98 Dengakugakubo, Kutsukake-cho, Toyoake, Aichi, 470-1192, Japan.
| | - Teppei Yamaguchi
- Department of Respiratory Medicine, Fujita Health University School of Medicine, 1-98 Dengakugakubo, Kutsukake-cho, Toyoake, Aichi, 470-1192, Japan
| | - Yasuhiro Goto
- Department of Respiratory Medicine, Fujita Health University School of Medicine, 1-98 Dengakugakubo, Kutsukake-cho, Toyoake, Aichi, 470-1192, Japan
| | - Kenji Kawada
- Department of Clinical Oncology, Fujita Health University Hospital, 1-98 Dengakugakubo, Kutsukake-cho, Toyoake, Aichi, 470-1192, Japan
| | - Tomoyuki Minezawa
- Department of Respiratory Medicine, Fujita Health University School of Medicine, 1-98 Dengakugakubo, Kutsukake-cho, Toyoake, Aichi, 470-1192, Japan
| | - Takuya Okamura
- Department of Respiratory Medicine, Fujita Health University School of Medicine, 1-98 Dengakugakubo, Kutsukake-cho, Toyoake, Aichi, 470-1192, Japan
| | - Ken Akao
- Department of Respiratory Medicine, Fujita Health University School of Medicine, 1-98 Dengakugakubo, Kutsukake-cho, Toyoake, Aichi, 470-1192, Japan
| | - Masamichi Hayashi
- Department of Respiratory Medicine, Fujita Health University School of Medicine, 1-98 Dengakugakubo, Kutsukake-cho, Toyoake, Aichi, 470-1192, Japan
| | - Sumito Isogai
- Department of Respiratory Medicine, Fujita Health University School of Medicine, 1-98 Dengakugakubo, Kutsukake-cho, Toyoake, Aichi, 470-1192, Japan
| | - Mitsushi Okazawa
- Department of Respiratory Medicine, Daiyukai General Hospital, 1-9-9 Sakura, Ichinomiya, Aichi, 491-8551, Japan
| | - Naozumi Hashimoto
- Department of Respiratory Medicine, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya, Aichi, 466-8560, Japan
| | - Yoshinori Hasegawa
- Department of Respiratory Medicine, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya, Aichi, 466-8560, Japan
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Isogai S, Niwa Y, Yatsuya H, Hayashi M, Yamamoto N, Okamura T, Minezawa T, Goto Y, Yamaguchi T, Takeyama T, Sakakibara Y, Morikawa S, Horiguchi T, Gotoh Y, Mieno Y, Uozu S, Nakanishi T, Okazawa M, Sakakibara H, Imaizumi K. Increased airway hyperresponsiveness to adenosine in patients with aspirin intolerant asthma. Allergol Int 2017; 66:360-362. [PMID: 27816384 DOI: 10.1016/j.alit.2016.10.001] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2016] [Revised: 09/16/2016] [Accepted: 09/26/2016] [Indexed: 11/15/2022] Open
Affiliation(s)
- Sumito Isogai
- Department of Respiratory Medicine, Fujita Health University, Aichi, Japan.
| | - Yoshikazu Niwa
- Department of Respiratory Medicine, Fujita Health University, Aichi, Japan
| | - Hiroshi Yatsuya
- Department of Public Health, Fujita Health University, Aichi, Japan
| | - Masamichi Hayashi
- Department of Respiratory Medicine, Fujita Health University, Aichi, Japan
| | - Naoki Yamamoto
- Laboratory of Molecular Biology & Histochemistry, Fujita Health University, Aichi, Japan
| | - Takuya Okamura
- Department of Respiratory Medicine, Fujita Health University, Aichi, Japan
| | - Tomoyuki Minezawa
- Department of Respiratory Medicine, Fujita Health University, Aichi, Japan
| | - Yasuhiro Goto
- Department of Respiratory Medicine, Fujita Health University, Aichi, Japan
| | - Teppei Yamaguchi
- Department of Respiratory Medicine, Fujita Health University, Aichi, Japan
| | - Tomoko Takeyama
- Department of Respiratory Medicine, Fujita Health University, Aichi, Japan
| | - Yosuke Sakakibara
- Department of Respiratory Medicine, Fujita Health University, Aichi, Japan
| | - Sayako Morikawa
- Department of Respiratory Medicine, Fujita Health University, Aichi, Japan
| | - Tomoya Horiguchi
- Department of Respiratory Medicine, Fujita Health University, Aichi, Japan
| | - Yusuke Gotoh
- Department of Respiratory Medicine, Fujita Health University, Aichi, Japan
| | - Yuki Mieno
- Department of Respiratory Medicine, Fujita Health University, Aichi, Japan
| | - Sakurako Uozu
- Department of Respiratory Medicine, Fujita Health University, Aichi, Japan
| | - Toru Nakanishi
- Department of Respiratory Medicine, Fujita Health University, Aichi, Japan
| | - Mitsushi Okazawa
- Department of Respiratory Medicine, Daiyukai General Hospital, Aichi, Japan
| | | | - Kazuyoshi Imaizumi
- Department of Respiratory Medicine, Fujita Health University, Aichi, Japan
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7
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Morikawa S, Okamura T, Minezawa T, Goto Y, Hayashi M, Yamaguchi T, Isogai S, Mieno Y, Yamamoto N, Uozu S, Nakanishi T, Okazawa M, Imaizumi K. A simple method of bronchial occlusion with silicone spigots (Endobronchial Watanabe Spigot; EWS®) using a curette. Ther Adv Respir Dis 2016; 10:518-524. [PMID: 27595645 PMCID: PMC5933595 DOI: 10.1177/1753465816664862] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Background: Bronchial occlusion with an Endobronchial Watanabe Spigot (EWS) has been
shown to be useful in managing prolonged bronchopleural fistulas and
intractable hemoptysis. EWS bronchial occlusion using a curette is less
technically demanding. This retrospective study evaluated the clinical
utility and simplicity of this method. Methods: A total of 18 consecutive patients (15 men, 3 women, aged 47–85 years) who
underwent bronchial occlusion using an EWS from April 2012 to August 2014
were evaluated. The method involves sticking the tip of a curette into an
EWS to the first joint, allowing it to be turned in any direction or at any
angle. The time required to occlude the target bronchus was measured on
routinely recorded digital videos. Other parameters evaluated included
success rates, complications, and clinical outcomes. Results: Of the 18 patients, 11 underwent bronchial occlusion for intractable
pneumothorax, 5 for postoperative bronchopleural fistula, two for
intractable empyema, and one for hemoptysis. Each patient required 1–7 EWSs
(median 4). Target bronchi included the right upper (n =
8), left upper (n = 5), right lower (n =
2), left lower (n = 2), and right middle
(n = 1) bronchi. The success rate of EWS insertion into
the target bronchus was 100%. Time per EWS occlusion ranged from 65–528 sec
(median 158.5 sec). Of the 62 insertions, 36 (58.1%) were completed within 3
min, and 58 (93.5%) within 5 min. Successful outcomes were observed in 15
(83.3%) of the 18 patients. Conclusions: EWS bronchial occlusion using a curette is a simple method for managing
intractable bronchopleural fistulas in daily clinical settings.
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Affiliation(s)
- Sayako Morikawa
- Department of Respiratory Medicine, Fujita Health University, Toyoake, Aichi, Japan
| | - Takuya Okamura
- Department of Respiratory Medicine, Fujita Health University, Toyoake, Aichi, Japan
| | - Tomoyuki Minezawa
- Department of Respiratory Medicine, Fujita Health University, Toyoake, Aichi, Japan
| | - Yasuhiro Goto
- Department of Respiratory Medicine, Fujita Health University, Toyoake, Aichi, Japan
| | - Masamichi Hayashi
- Department of Respiratory Medicine, Fujita Health University, Toyoake, Aichi, Japan
| | - Teppei Yamaguchi
- Department of Respiratory Medicine, Fujita Health University, Toyoake, Aichi, Japan
| | - Sumito Isogai
- Department of Respiratory Medicine, Fujita Health University, Toyoake, Aichi, Japan
| | - Yuki Mieno
- Department of Respiratory Medicine, Fujita Health University, Toyoake, Aichi, Japan
| | - Naoki Yamamoto
- Laboratory of Molecular Biology and Histochemistry, Fujita Health University, Toyoake, Aichi, Japan
| | - Sakurako Uozu
- Department of Respiratory Medicine, Fujita Health University, Toyoake, Aichi, Japan
| | - Toru Nakanishi
- Department of Respiratory Medicine, Fujita Health University, Toyoake, Aichi, Japan
| | - Mitsushi Okazawa
- Department of Respiratory Medicine and Clinical Allergy, Daiyukai General Hospital, Ichinomiya, Aichi, Japan
| | - Kazuyoshi Imaizumi
- Department of Respiratory Medicine, Fujita Health University, 1-98, Dengakugakubo, Kutsukake-cho, Toyoake, Aichi 470-1192, Japan
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8
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Minezawa T, Okamura T, Yatsuya H, Yamamoto N, Morikawa S, Yamaguchi T, Morishita M, Niwa Y, Takeyama T, Mieno Y, Hoshino T, Uozu S, Goto Y, Hayashi M, Isogai S, Matsuo M, Nakanishi T, Hashimoto N, Okazawa M, Imaizumi K. Bronchus sign on thin-section computed tomography is a powerful predictive factor for successful transbronchial biopsy using endobronchial ultrasound with a guide sheath for small peripheral lung lesions: a retrospective observational study. BMC Med Imaging 2015; 15:21. [PMID: 26092497 PMCID: PMC4475307 DOI: 10.1186/s12880-015-0060-5] [Citation(s) in RCA: 70] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2014] [Accepted: 05/19/2015] [Indexed: 11/10/2022] Open
Abstract
Background Recent advances in bronchoscopy, such as transbronchial biopsy (TBB) using endobronchial ultrasonography with a guide sheath (EBUS-GS), have improved the diagnostic yield of small-sized peripheral lung lesions. In some cases, however, it is difficult to obtain adequate biopsy samples for pathological diagnosis. Adequate prediction of the diagnostic accuracy of TBB with EBUS-GS is important before deciding whether bronchoscopy should be performed. Methods We retrospectively reviewed 149 consecutive patients who underwent TBB with EBUS-GS for small-sized peripheral lung lesions (≤30 mm in diameter) from April 2012 to March 2013. We conducted an exploratory analysis to identify clinical factors that can predict an accurate diagnosis by TBB with EBUS-GS. All patients underwent thin-section chest computed tomography (CT) scans (0.5-mm slices), and the CT bronchus sign was evaluated before bronchoscopy in a group discussion. The final diagnoses were pathologically or clinically confirmed in all studied patients (malignant lesions, 110 patients; benign lesions, 39 patients). Results The total diagnostic yield in this study was 72.5 % (95 % confidence interval: 64.8–79.0 %). Lesion size, lesion visibility on chest X-ray, and classification of the CT bronchus sign were factors significantly associated with the definitive biopsy result in the univariate analysis. In the multivariate analysis, only the CT bronchus sign remained as a significant predictive factor for successful bronchoscopic diagnosis. The CT bronchus sign was also significantly associated with the EBUS findings of the lesions. Conclusion Our results suggest that the CT bronchus sign is a powerful predictive factor for successful TBB with EBUS-GS.
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Affiliation(s)
- Tomoyuki Minezawa
- Division of Respiratory Medicine and Clinical Allergy, Department of Internal Medicine, Fujita Health University, 1-98 Dengakugakubo, Kutsukake-cho, Toyoake, Aichi, 470-1192, Japan.
| | - Takuya Okamura
- Division of Respiratory Medicine and Clinical Allergy, Department of Internal Medicine, Fujita Health University, 1-98 Dengakugakubo, Kutsukake-cho, Toyoake, Aichi, 470-1192, Japan.
| | - Hiroshi Yatsuya
- Department of Public Health, Fujita Health University, Toyoake, Aichi, Japan.
| | - Naoki Yamamoto
- Laboratory of Molecular Biology & Histochemistry, Fujita Health University, Toyoake, Aichi, Japan.
| | - Sayako Morikawa
- Division of Respiratory Medicine and Clinical Allergy, Department of Internal Medicine, Fujita Health University, 1-98 Dengakugakubo, Kutsukake-cho, Toyoake, Aichi, 470-1192, Japan.
| | - Teppei Yamaguchi
- Division of Respiratory Medicine and Clinical Allergy, Department of Internal Medicine, Fujita Health University, 1-98 Dengakugakubo, Kutsukake-cho, Toyoake, Aichi, 470-1192, Japan.
| | - Mariko Morishita
- Department of Respiratory Medicine, Nagoya University Graduate School of Medicine, Nagoya, Japan.
| | - Yoshikazu Niwa
- Division of Respiratory Medicine and Clinical Allergy, Department of Internal Medicine, Fujita Health University, 1-98 Dengakugakubo, Kutsukake-cho, Toyoake, Aichi, 470-1192, Japan.
| | - Tomoko Takeyama
- Division of Respiratory Medicine and Clinical Allergy, Department of Internal Medicine, Fujita Health University, 1-98 Dengakugakubo, Kutsukake-cho, Toyoake, Aichi, 470-1192, Japan.
| | - Yuki Mieno
- Division of Respiratory Medicine and Clinical Allergy, Department of Internal Medicine, Fujita Health University, 1-98 Dengakugakubo, Kutsukake-cho, Toyoake, Aichi, 470-1192, Japan.
| | - Tami Hoshino
- Division of Respiratory Medicine and Clinical Allergy, Department of Internal Medicine, Fujita Health University, 1-98 Dengakugakubo, Kutsukake-cho, Toyoake, Aichi, 470-1192, Japan.
| | - Sakurako Uozu
- Division of Respiratory Medicine and Clinical Allergy, Department of Internal Medicine, Fujita Health University, 1-98 Dengakugakubo, Kutsukake-cho, Toyoake, Aichi, 470-1192, Japan.
| | - Yasuhiro Goto
- Division of Respiratory Medicine and Clinical Allergy, Department of Internal Medicine, Fujita Health University, 1-98 Dengakugakubo, Kutsukake-cho, Toyoake, Aichi, 470-1192, Japan.
| | - Masamichi Hayashi
- Division of Respiratory Medicine and Clinical Allergy, Department of Internal Medicine, Fujita Health University, 1-98 Dengakugakubo, Kutsukake-cho, Toyoake, Aichi, 470-1192, Japan.
| | - Sumito Isogai
- Division of Respiratory Medicine and Clinical Allergy, Department of Internal Medicine, Fujita Health University, 1-98 Dengakugakubo, Kutsukake-cho, Toyoake, Aichi, 470-1192, Japan.
| | - Masaki Matsuo
- Department of Respiratory Medicine, Chubu Rosai Hospital, Nagoya, Japan.
| | - Toru Nakanishi
- Division of Respiratory Medicine and Clinical Allergy, Department of Internal Medicine, Fujita Health University, 1-98 Dengakugakubo, Kutsukake-cho, Toyoake, Aichi, 470-1192, Japan.
| | - Naozumi Hashimoto
- Department of Respiratory Medicine, Nagoya University Graduate School of Medicine, Nagoya, Japan.
| | - Mitsushi Okazawa
- Department of Respiratory Medicine, Daiyu-kai Hospital, Ichinomiya, Aichi, Japan.
| | - Kazuyoshi Imaizumi
- Division of Respiratory Medicine and Clinical Allergy, Department of Internal Medicine, Fujita Health University, 1-98 Dengakugakubo, Kutsukake-cho, Toyoake, Aichi, 470-1192, Japan.
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Yamaguchi T, Isogai S, Okamura T, Uozu S, Mieno Y, Hoshino T, Goto Y, Hayashi M, Nakanishi T, Imaizumi K. Pharmacokinetics of gefitinib in a patient with non-small cell lung cancer undergoing continuous ambulatory peritoneal dialysis. Case Rep Oncol 2015; 8:78-82. [PMID: 25848356 PMCID: PMC4361913 DOI: 10.1159/000375485] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
A 72-year-old man undergoing continuous ambulatory peritoneal dialysis (CAPD) for chronic renal failure and who had undergone right upper lobectomy for lung adenocarcinoma (pT2aN0M0) 2 years ago was admitted for recurrence of lung cancer presenting as multiple brain metastases. An epidermal growth factor receptor mutation analysis of his lung cancer revealed a deletion of 15 nucleotides (E746-A750) in exon 19. After whole-brain radiotherapy, we started daily administration of 250 mg gefitinib under the continuation of CAPD and performed a pharmacokinetic analysis. We speculated that the plasma concentration of gefitinib reached the steady state at least by day 16 after the start of gefitinib (626.6 ng/ml at trough level). On day 46, the plasma concentration was 538.4 ng/ml at trough level and the concentration in the peritoneal dialysis fluid was 34.6 ng/ml, suggesting that CAPD appeared to have little effect on the pharmacokinetics of gefitinib. During gefitinib therapy, there were no significant adverse events except for grade 2 diarrhea. Gefitinib could be safely administered to a patient undergoing CAPD.
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Affiliation(s)
- Teppei Yamaguchi
- Division of Respiratory Medicine and Clinical Allergy, Department of Internal Medicine, Fujita Health University, Toyoake, Japan
| | - Sumito Isogai
- Division of Respiratory Medicine and Clinical Allergy, Department of Internal Medicine, Fujita Health University, Toyoake, Japan
| | - Takuya Okamura
- Division of Respiratory Medicine and Clinical Allergy, Department of Internal Medicine, Fujita Health University, Toyoake, Japan
| | - Sakurako Uozu
- Division of Respiratory Medicine and Clinical Allergy, Department of Internal Medicine, Fujita Health University, Toyoake, Japan
| | - Yuki Mieno
- Division of Respiratory Medicine and Clinical Allergy, Department of Internal Medicine, Fujita Health University, Toyoake, Japan
| | - Tami Hoshino
- Division of Respiratory Medicine and Clinical Allergy, Department of Internal Medicine, Fujita Health University, Toyoake, Japan
| | - Yasuhiro Goto
- Division of Respiratory Medicine and Clinical Allergy, Department of Internal Medicine, Fujita Health University, Toyoake, Japan
| | - Masamichi Hayashi
- Division of Respiratory Medicine and Clinical Allergy, Department of Internal Medicine, Fujita Health University, Toyoake, Japan
| | - Toru Nakanishi
- Division of Respiratory Medicine and Clinical Allergy, Department of Internal Medicine, Fujita Health University, Toyoake, Japan
| | - Kazuyoshi Imaizumi
- Division of Respiratory Medicine and Clinical Allergy, Department of Internal Medicine, Fujita Health University, Toyoake, Japan
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10
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Yamaguchi T, Nakanishi T, Hayashi M, Uozu S, Okamura T, Morishita M, Takeyama T, Minezawa T, Morikawa S, Niwa Y, Mieno Y, Kato A, Hoshino T, Isogai S, Okazawa M, Imaizumi K. [Efficacy and safety of cisplatin plus pemetrexed as a first-line treatment for Japanese patients with advanced non-squamous non-small-cell lung cancer -- a retrospective analysis]. Gan To Kagaku Ryoho 2015; 42:183-187. [PMID: 25743136] [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: 06/04/2023]
Abstract
BACKGROUND Cisplatin plus pemetrexed is considered the standard of care for the first-line treatment of patients with advanced non-squamous non-small-cell lung cancer (NSCLC). However, little is known about the efficacy and safety of this regimen in Japanese patients in a daily clinical setting. METHODS We retrospectively analyzed 40 patients who received cisplatin (75 mg/m/(2)) and pemetrexed (500 mg/m(2)) as a first-line treatment for advanced non-squamous NSCLC. RESULTS Recorded Grade 3 or 4 hematological toxicities included neutropenia in 7 cases (17.5%), leukopenia in 5 cases (12.5%), anemia in 1 case (2.5%), thrombocytopenia in 1 case (2.5%), and febrile neutropenia in 1 case (2.5%). Grade 3 or 4 nonhematological toxicities included anorexia in 3 cases (7.5%), infection in 1 case (2.5%), rash in 1 case (2.5%), and increased transaminase expression in 1 case (2.5%). Therefore, the adverse events were mostly mild. There were no treatment related deaths. The overall response rate was 37.5%, median progression free survival was 5.6 months, and median overall survival (OS) was 18.8 months. In an epidermal growth factor receptor (EGFR) mutation status subgroup analysis, the median OS of patients with wild-type EGFR or unknown status (n=28)was 16.8 months. CONCLUSION Cisplatin plus pemetrexed was well tolerated as a first-line treatment and effective in Japanese patients with advanced non-squamous NSCLC.
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Affiliation(s)
- Teppei Yamaguchi
- Division of Respiratory Medicine and Clinical Allergy, Dept. of Internal Medicine, Fujita Health University
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11
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Ogawa T, Imaizumi K, Hashimoto I, Shindo Y, Imai N, Uozu S, Shimokata T, Ito S, Hashimoto N, Sato M, Kondo M, Hasegawa Y. Prospective analysis of efficacy and safety of an individualized-midazolam-dosing protocol for sedation during prolonged bronchoscopy. Respir Investig 2013; 52:153-9. [PMID: 24853014 DOI: 10.1016/j.resinv.2013.09.003] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2013] [Revised: 08/11/2013] [Accepted: 09/19/2013] [Indexed: 01/10/2023]
Abstract
BACKGROUND Newer more advanced techniques in bronchoscopy may require longer procedure times, although a standard protocol for sedation during prolonged bronchoscopy has not yet been defined. METHODS We designed a prospective, non-randomized, single-arm study (UMIN trial number 000003971) using patient questionnaires and vital sign monitoring to assess the efficacy and safety of a standardized midazolam dosing protocol based on gender and age for use during bronchoscopy. The loading dose of midazolam was 0.075mg/kg for men ≤65 years old and women ≤70 and 0.05mg/kg for men ≥66 years and women ≥71 years, with subsequent doses of one-half the loading dose to be administered every 20min. The primary endpoint was tolerability and secondary endpoints included anxiety and recall of procedure, willingness to undergo repeat procedure, and complications. Safety was evaluated in terms of monitored changes in blood pressures, ECG, oxygen saturation, and CO2 content in expiration during the procedure. RESULTS A total of 204 patients were included in the study. Overall, 163 patients (79.9%) reported "no distress" during the procedure, 185 patients (90.7%) reported "no anxiety," and 175 (85.8%) replied that they would accept a repeat procedure, if necessary. The mean minimum oxygen saturation was 90.2% and the mean maximum expiratory CO2 level was 37.7mmHg. There were no serious complications related to the protocol. CONCLUSIONS The midazolam dosing protocol examined in this study was safe and effective. It is simple, and it could easily be translated to routine clinical practice.
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Affiliation(s)
- Tomomi Ogawa
- Department of Respiratory Medicine, Nagoya University Graduate School of Medicine, Nagoya, Japan.
| | - Kazuyoshi Imaizumi
- Division of Respiratory Medicine and Clinical Allergy, Department of Internal Medicine, Fujita Health University, Toyoake, Aichi 470-1192, Japan.
| | - Izumi Hashimoto
- Division of Respiratory Medicine and Clinical Allergy, Department of Internal Medicine, Fujita Health University, Toyoake, Aichi 470-1192, Japan.
| | - Yuichiro Shindo
- Department of Respiratory Medicine, Nagoya University Graduate School of Medicine, Nagoya, Japan.
| | - Naoyuki Imai
- Department of Respiratory Medicine, Nagoya University Graduate School of Medicine, Nagoya, Japan.
| | - Sakurako Uozu
- Division of Respiratory Medicine and Clinical Allergy, Department of Internal Medicine, Fujita Health University, Toyoake, Aichi 470-1192, Japan.
| | - Tomoya Shimokata
- Department of Respiratory Medicine, Nagoya University Graduate School of Medicine, Nagoya, Japan.
| | - Satoru Ito
- Department of Respiratory Medicine, Nagoya University Graduate School of Medicine, Nagoya, Japan.
| | - Naozumi Hashimoto
- Department of Respiratory Medicine, Nagoya University Graduate School of Medicine, Nagoya, Japan.
| | - Mitsuo Sato
- Department of Respiratory Medicine, Nagoya University Graduate School of Medicine, Nagoya, Japan.
| | - Masashi Kondo
- Department of Respiratory Medicine, Nagoya University Graduate School of Medicine, Nagoya, Japan.
| | - Yoshinori Hasegawa
- Department of Respiratory Medicine, Nagoya University Graduate School of Medicine, Nagoya, Japan.
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12
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Yamaguchi T, Imaizumi K, Morikawa S, Minezawa T, Okamura T, Morishita M, Uozu S, Hayashi M, Nakanishi T, Okazawa M. Hydration in Four Hours Around the Cisplatin Infusion May Be Critical for Preventing Cisplatin-Induced Nephrotoxicity. Ann Oncol 2013. [DOI: 10.1093/annonc/mdt460.70] [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: 11/14/2022] Open
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13
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Hong Z, Ueguchi-Tanaka M, Umemura K, Uozu S, Fujioka S, Takatsuto S, Yoshida S, Ashikari M, Kitano H, Matsuoka M. A rice brassinosteroid-deficient mutant, ebisu dwarf (d2), is caused by a loss of function of a new member of cytochrome P450. Plant Cell 2003; 15:2900-10. [PMID: 14615594 PMCID: PMC282825 DOI: 10.1105/tpc.014712] [Citation(s) in RCA: 203] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/13/2003] [Accepted: 09/07/2003] [Indexed: 05/18/2023]
Abstract
We characterized a rice dwarf mutant, ebisu dwarf (d2). It showed the pleiotropic abnormal phenotype similar to that of the rice brassinosteroid (BR)-insensitive mutant, d61. The dwarf phenotype of d2 was rescued by exogenous brassinolide treatment. The accumulation profile of BR intermediates in the d2 mutants confirmed that these plants are deficient in late BR biosynthesis. We cloned the D2 gene by map-based cloning. The D2 gene encoded a novel cytochrome P450 classified in CYP90D that is highly similar to the reported BR synthesis enzymes. Introduction of the wild D2 gene into d2-1 rescued the abnormal phenotype of the mutants. In feeding experiments, 3-dehydro-6-deoxoteasterone, 3-dehydroteasterone, and brassinolide effectively caused the lamina joints of the d2 plants to bend, whereas more upstream compounds did not cause bending. Based on these results, we conclude that D2/CYP90D2 catalyzes the steps from 6-deoxoteasterone to 3-dehydro-6-deoxoteasterone and from teasterone to 3-dehydroteasterone in the late BR biosynthesis pathway.
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Affiliation(s)
- Zhi Hong
- BioScience and Biotechnology Center, Nagoya University, Chikusa, Nagoya 464-8601, Japan
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14
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Hong Z, Ueguchi-Tanaka M, Shimizu-Sato S, Inukai Y, Fujioka S, Shimada Y, Takatsuto S, Agetsuma M, Yoshida S, Watanabe Y, Uozu S, Kitano H, Ashikari M, Matsuoka M. Loss-of-function of a rice brassinosteroid biosynthetic enzyme, C-6 oxidase, prevents the organized arrangement and polar elongation of cells in the leaves and stem. Plant J 2002; 32:495-508. [PMID: 12445121 DOI: 10.1046/j.1365-313x.2002.01438.x] [Citation(s) in RCA: 137] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
Molecular genetic and physiological studies on brassinosteroid (BR)-related mutants of dicot plants have revealed that BRs play important roles in normal plant growth and development. However, little is known about the function of BR in monocots (grasses), except for the phenotypic analysis of a rice mutant partially insensitive to BR signaling. To investigate the function of BR in monocots, we identified and characterized BR-deficient mutants of rice, BR-deficient dwarf1 (brd1). The brd1 mutants showed a range of abnormalities in organ development and growth, the most striking of which were defects in the elongation of the stem and leaves. Light microscopic observations revealed that this abnormality was primarily owing to a failure in the organization and polar elongation of the leaf and stem cells. The accumulation profile of BR compounds in the brd1 mutants suggested that these plants may be deficient in the activity of BR C-6 oxidase. Therefore, we cloned a rice gene, OsDWARF, which has a high sequence similarity to the tomato C-6 oxidase gene, DWARF. Introduction of the wild-type OsDWARF gene into brd1 rescued the abnormal phenotype of the mutants. The OsDWARF gene was expressed at a low level in all of the examined tissues, with preferential expression in the leaf sheath, and the expression was negatively regulated by brassinolide treatment. On the basis of these findings, we discuss the biological function of BRs in rice plants.
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Affiliation(s)
- Zhi Hong
- BioScience Center, Nagoya University, Chikusa, Nagoya 464-8601, Japan
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15
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Uozu S, Tanaka-Ueguchi M, Kitano H, Hattori K, Matsuoka M. Characterization of XET-related genes of rice. Plant Physiol 2000; 122:853-9. [PMID: 10712549 PMCID: PMC58921 DOI: 10.1104/pp.122.3.853] [Citation(s) in RCA: 67] [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] [Subscribe] [Scholar Register] [Received: 08/03/1999] [Accepted: 12/01/1999] [Indexed: 05/18/2023]
Abstract
To elucidate the mechanism of internodal elongation in rice (Oryza sativa L.), we analyzed genes encoding xyloglucan endotransglycosylase (XET), a cell wall-loosening enzyme essential for cell elongation. Four rice XET-related (XTR) genes, OsXTR1, OsXTR2, OsXTR3, and OsXTR4, were isolated and their expression patterns in rice plants determined. The expression of the four XTR genes showed different patterns of organ specificity and responses to several plant hormones. OsXTR1 and OsXTR3 were up-regulated by gibberellin and brassinosteroids, whereas OsXTR2 and OsXTR4 showed no clear response to these hormones. Expression of the four XTR genes was also investigated in elongating internodes at different developmental stages. OsXTR1 and OsXTR3 were preferentially expressed in the elongating zone of internodes, while OsXTR2 and OsXTR4 were expressed in nodes and in the divisional and elongating zones of internodes. In three genetic mutants with abnormal heights, the expression of OsXTR1 and OsXTR3 correlated with the height of the mutants, whereas no such correlation was observed for OsXTR2 and OsXTR4. Based on these observations, we discuss the roles that OsXTR1 and OsXTR3 may play in internodal elongation in rice.
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Affiliation(s)
- S Uozu
- Graduate School of Bioagricultural Science and BioScience Center, Nagoya University, Chikusa, Nagoya 464-8601, Japan.
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16
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Uozu S, Ikehashi H, Ohmido N, Ohtsubo H, Ohtsubo E, Fukui K. Repetitive sequences: cause for variation in genome size and chromosome morphology in the genus Oryza. Plant Mol Biol 1997; 35:791-9. [PMID: 9426599 DOI: 10.1023/a:1005823124989] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
Large variation in genome size as determined by the nuclear DNA content and the mitotic chromosome size among diploid rice species is revealed using flow cytometry and image analyses. Both the total chromosomal length (r = 0.939) and the total chromosomal area (r = 0.927) correlated well with the nuclear DNA content. Among all the species examined, Oryza australiensis (E genome) and O. brachyantha (F genome), respectively, were the largest and smallest in genome size. O. sativa (A genome) involving all the cultivated species showed the intermediate genome size between them. The distribution patterns of genome-specific repetitive DNA sequences were physically determined using fluorescence in situ hybridization (FISH). O. brachyantha had limited sites of the repetitive DNA sequences specific to the F genome. O. australiensis showed overall amplification of genome-specific DNA sequences throughout the chromosomes. The amplification of the repetitive DNA sequences causes the variation in the chromosome morphology and thus the genome size among diploid species in the genus Oryza.
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Affiliation(s)
- S Uozu
- Laboratory of Rice Genetic Engineering, Hokuriku National Agricultural Experiment Station, Joetsu, Japan
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17
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Affiliation(s)
- Sakurako Uozu
- Laboratory of Plant Breeding, Faculty of Agriculture, Kyoto University
| | - Tetsuya Nakazaki
- Laboratory of Plant Breeding, Faculty of Agriculture, Kyoto University
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