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D W B, Osipov VY, Takai K. Long range interactions and related carbon-carbon bond reconstruction between interior and surface defects in nanodiamonds. Phys Chem Chem Phys 2021; 23:14592-14600. [PMID: 34164634 DOI: 10.1039/d0cp05914e] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Interactions between interior substitutional nitrogen defects and surface unsaturated dangling bonds in synthetic nanodiamonds of ∼25 nm size were explored experimentally and theoretically. The experimental results demonstrate the disappearance of the specific paramagnetism of nitrogen centers in the smallest nanoparticles isolated after processing large micron diamonds in a ball mill, accompanied by the formation of unsaturated surface dangling bonds and internal defects. First principles modelling confirms the vanishing of the magnetic moments related with nitrogen centers even for distances from the surface defects greater than 1 nm. To understand this effect, we consider a bond reconstruction scheme with the formation of several carbon-carbon double bonds in the area between the interior and surface point defects. The scheme is in agreement with the changes in electron density through the distance between the two defects. The developed approach can be used to describe the interactions between various defects in carbon-based systems.
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Affiliation(s)
- Boukhvalov D W
- College of Science, Institute of Materials Physics and Chemistry, Nanjing Forestry University, Nanjing 210037, P. R. China. and Institute of Physics and Technology, Ural Federal University, Mira 19 Str., 620002, Yekaterinburg, Russia
| | - V Yu Osipov
- Ioffe Institute, Polytechnicheskaya 26, St. Petersburg 194021, Russia
| | - K Takai
- Department of Chemical Science and Technology, Hosei University, 3-7-2, Kajino, Koganei, Tokyo 184-8584, Japan
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Osipov VY, Boukhvalov DW, Takai K. Structure and Magnetic Properties of Superoxide Radical Anion Complexes with Low Binding Energy at the Graphene Edges. RUSS J COORD CHEM+ 2020. [DOI: 10.1134/s107032842011007x] [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: 11/22/2022]
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Takahashi S, Mine T, Kawai H, Takai K, Yoshikawa F, Takada M, Fujita K, Nishibori Y, Maruyama T. Conduction gaps after pulmonary vein isolation due to high contact force ablation in patients with atrial fibrillation. Eur Heart J 2020. [DOI: 10.1093/ehjci/ehaa946.0444] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Background
Catheter ablation for atrial fibrillation (AF) with high contact force (CF) has been reported to lead to the gaps after pulmonary vein isolation (PVI), and the appearance of the gaps depends on the site in the left atrium (LA).
Purpose
The aim of this study is to clarify the relationship between the gaps appearance and high CF.
Methods
In the clinical study, 74 consecutive patients (39 males, age 71±9, 46 with paroxysmal AF) underwent conventional PVI with a point-by-point radiofrequency (RF) ablation using a CF sensing catheter (TactiCath SETM). RF energy (J), number of RF point, Lesion index (LSI), force-time integral (FTI), average CF (g), and the degree of LA depression with high CF were evaluated. In the experimental study (figure), the relationship between the ablation area and the degree of depression with high CF using bovine left ventricular wall.
Results
In the clinical study, the gaps were found in 175 of 1182 sites after first path PVI ablation. The CF in the gap sites was higher than without the gap sites in RPV roof, anterior RSPV and anterior RPV carina (18.9±6.8 vs 15.0±5.7g p=0.0262, 26.4±11.6 vs 19.5±6.0g p=0.0029, 22.7±6.4 vs 19.1±5.5g, p=0.0161). Meanwhile, there were no differences in RF energy, number of RF point, LSI, FTI. High CF (≥30g) showed a depression of 3 mm or more in only RPV roof and anterior RPV (figure). In the experimental study, the ablation range narrowed as the indentation deepened with more than 30g CF (r=0.6417, p=0.0625).
Conclusion
Catheter ablation for AF with high contact force might lead to the gaps in RPV roof and anterior RPV site by the reduction of the ablation area due to depression caused by the pressure.
Extension of each contact force
Funding Acknowledgement
Type of funding source: None
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Affiliation(s)
| | - T Mine
- Hyogo College of Medicine, cardiovascular division, Hyogo, Japan
| | - H Kawai
- Kawasaki Hospital, Kobe, Japan
| | - K Takai
- Kawasaki Hospital, Kobe, Japan
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Tozuka K, Nagai SE, Matsumoto H, Hayashi Y, Kubo K, Tsuboi M, Sato A, Takai K, Wang X, Yamada Y, Inoue K. Abstract P5-12-17: Prognostic and predictive value of serum level of vascular endothelial growth factor-A in metastatic breast cancer patients treated with bevacizumab plus paclitaxel. Cancer Res 2019. [DOI: 10.1158/1538-7445.sabcs18-p5-12-17] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Background
Several studies showed that first-line bevacizumab plus chemotherapy for HER2-negative metastatic breast cancer improves progression-free survival and tumor response rate but not overall survival. MERiDiAN trial evaluated plasma vascular endothelial growth factor-A (VEGF-A) prospectively as a predictive biomarker for bevacizumab efficacy in metastatic breast cancer. However, results of this trial do not support using baseline plasma VEGF-A to identify patients benefitting most from bevacizumab. We measured baseline serum VEGF-A level from stored blood samples of metastatic breast cancer patient with treated bevacizumab plus paclitaxel as fist-line and later line therapy, and evaluated a correlation between serum VEGF-A level and efficacy of bevacizumab and prognosis of breast cancer patients tread with bevacizumab, retrospectively.
Patients and methods
We examined blood samples from 57 metastatic breast cancer patients treated with bevacizumab and paclitaxel, after obtaining written informed consent. And, we evaluated a correlation between baseline serum VEGF-A level and time to treatment failure (TTF) and overall survival (OS). We also compared the serum VEGF-A level of response group (CR and PR) and that of non-response group (SD and PD).
Results
Baseline serum level of VEGF-A ranged from 80 to 2079 pg/ml. Cases of treatment line were as follows: first-line, 22 cases (38.6%); second line, 11 cases (19.3%) and third-line and the later line, 24 cases (42.1%). The cutoff identified by ROC curve analysis that was able to differentiate response group and non-response group in first-line setting was 360pg/ml for serum VEGF-A. And, we separated high serum VGEF-A group and low serum VEGF-A group of patients treated with bevacizumab plus paclitaxel.
In patients treated as first line therapy, median TTF was 4.0 months with high serum VGEF-A group versus 5.0 months with low serum VEGF-A group, and median OS was 12 months with high serum VGEF-A group versus 11months with low serum VEGF-A group. There were no significant differences in both TTF and OS in first line setting. In patients treated as second line and later line therapy, median TTF was 2.8 months with high serum VGEF-A group versus 7.1 months with low serum VEGF-A group, and median OS was 6.4 months with high serum VGEF-A group versus 12.7 months with low serum VEGF-A group. The prognosis of high serum VEGF-A group was significantly worse than that of low serum group in both TTF and OS.
The serum VEGF-A level of response group was tend to be higher than that of non-response group in first line setting, and was lower in second and later line setting. However, there were no significant differences.
Conclusion
In this study, serum VEGF-A cannot be a predictor for efficacy of bevacizumab plus paclitaxel as first line therapy for metastatic breast cancer patients. On the other hand, there was a possibility that high serum level of VEGF-A can be a poor prognostic factor in late line therapy setting of bevacizumab.
Citation Format: Tozuka K, Nagai SE, Matsumoto H, Hayashi Y, Kubo K, Tsuboi M, Sato A, Takai K, Wang X, Yamada Y, Inoue K. Prognostic and predictive value of serum level of vascular endothelial growth factor-A in metastatic breast cancer patients treated with bevacizumab plus paclitaxel [abstract]. In: Proceedings of the 2018 San Antonio Breast Cancer Symposium; 2018 Dec 4-8; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2019;79(4 Suppl):Abstract nr P5-12-17.
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Affiliation(s)
- K Tozuka
- Saitama Cancer Center, Ina, Kita-adachi-gun, Saitama-Ken, Japan
| | - SE Nagai
- Saitama Cancer Center, Ina, Kita-adachi-gun, Saitama-Ken, Japan
| | - H Matsumoto
- Saitama Cancer Center, Ina, Kita-adachi-gun, Saitama-Ken, Japan
| | - Y Hayashi
- Saitama Cancer Center, Ina, Kita-adachi-gun, Saitama-Ken, Japan
| | - K Kubo
- Saitama Cancer Center, Ina, Kita-adachi-gun, Saitama-Ken, Japan
| | - M Tsuboi
- Saitama Cancer Center, Ina, Kita-adachi-gun, Saitama-Ken, Japan
| | - A Sato
- Saitama Cancer Center, Ina, Kita-adachi-gun, Saitama-Ken, Japan
| | - K Takai
- Saitama Cancer Center, Ina, Kita-adachi-gun, Saitama-Ken, Japan
| | - X Wang
- Saitama Cancer Center, Ina, Kita-adachi-gun, Saitama-Ken, Japan
| | - Y Yamada
- Saitama Cancer Center, Ina, Kita-adachi-gun, Saitama-Ken, Japan
| | - K Inoue
- Saitama Cancer Center, Ina, Kita-adachi-gun, Saitama-Ken, Japan
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Vokhmintcev K, Linkov P, Samokhvalov P, Takai K, Baranov A, Fedorov A, Nabiev I. Large-scale Synthesis of Monodisperse PbS Quantum Dots. ACTA ACUST UNITED AC 2018. [DOI: 10.18502/ken.v3i3.2007] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Tozuka K, Nagai SE, Kubo K, Komatsu K, Takai K, Inoue K, Matsumoto H, Hayashi Y, Tsuboi M, Yamada Y, Wang X, Suganuma M. Abstract P2-01-08: Enumeration of heterogeneous circulating tumor cells (CTCs) using size-based method in early, and metastatic, breast cancer patients. Cancer Res 2018. [DOI: 10.1158/1538-7445.sabcs17-p2-01-08] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Background
The detection of circulating tumor cells (CTCs) in peripheral blood is an independent predictor of the efficacy of systemic therapy, and also a prognostic marker for patients with metastatic breast cancer. One of the main methods to detect CTCs is CellSearch system, which uses immune-magnetic separation followed by immunocytochemistry. A microdevice (CTChip from ClearCell system) can capture and enumerate CTCs based on distinctive physiological differences (size and deformability) between cancer cells and blood cells. CTChip thus obtains a larger CTC yield than affinity-based separation, which enriches a particular subgroup of cells expressing EpCAM. In this study, we enumerate CTCs in peripheral blood from early and metastatic breast cancer patients using a size-based method.
Patients and methods
We examined blood samples from a total of 18 early and metastatic breast cancer patients, after obtaining written informed consent. Blood samples were taken in sodium EDTA tubes after discarding the first 1ml of blood from the syringe. Two ml blood samples were applied to CTChip (ClearCell system), and CTCs were eventually trapped in the microwells of the CTChip. Trapped cells were analyzed by immunocytochemistry with monoclonal antibodies specific for leukocytes (CD45) and epithelial cells (CK8/18), along with 4',6-diamidino-2-phenylindole (DAPI) for nuclei: CK8/18-positive, DAPI-positive and CD45-negative cells more than 10 μm in diameter were defined as CTCs. Eight patients were examined using both the CTChip and CellSearch system to compare the yield of CTCs.
Results
Of 18 patients, 6 were de novo stage IV, 6 were recurrent and 6 were early stage breast cancer patients. Of primary tumors, 8 were HER2- and ER and/or PR +, 6 were HER2-and ER- and PR-, 3 were HER2+ and ER and/or PR +, and one was HER2+ and ER- and PR-. Using CTChip, detected CTCs ranged from 3 - 107 cells/2 ml in all cases: 3 - 83 for early stage, 19 - 156 for stage IV and 21 - 146 for recurrent. The number of CTCs found in recurrent patients tended to be higher than in early stage patients. Size-based method using CTChip clearly showed high sensitivity compared with the CellSearch system, which detected CTCs in only 2 cases out of 8. In analysis by immunochemistry, we found CK-negative, CD45-negative and DAPI positive cells with larger diameter (>16 μm) than CK-positive CTCs in most patients, and the numbers were higher in stage IV (8.5 cells of median value) and recurrent (13 cells) patients than in early stage patients (1.5 cells). Our study suggested that CK-negative large cells might be CTCs with epithelial–mesenchymal transition (EMT).
Conclusion
This size-based technology enables us to capture CTCs regardless of EpCAM expression. Enumerated CTCs varied in size and positivity of CK8/18, suggesting the heterogeneity of CTCs. Further research, especially focusing on EMT will be crucial to understand the key mechanism of metastasis and drug resistance.
Citation Format: Tozuka K, Nagai SE, Kubo K, Komatsu K, Takai K, Inoue K, Matsumoto H, Hayashi Y, Tsuboi M, Yamada Y, Wang X, Suganuma M. Enumeration of heterogeneous circulating tumor cells (CTCs) using size-based method in early, and metastatic, breast cancer patients [abstract]. In: Proceedings of the 2017 San Antonio Breast Cancer Symposium; 2017 Dec 5-9; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2018;78(4 Suppl):Abstract nr P2-01-08.
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Affiliation(s)
- K Tozuka
- Saitama Cancer Center, Ina, Kita-adachi-gun, Saitama-ken, Japan; Graduate School of Science and Engineerring, Saitama University, Saitama, Saitama-ken, Japan
| | - SE Nagai
- Saitama Cancer Center, Ina, Kita-adachi-gun, Saitama-ken, Japan; Graduate School of Science and Engineerring, Saitama University, Saitama, Saitama-ken, Japan
| | - K Kubo
- Saitama Cancer Center, Ina, Kita-adachi-gun, Saitama-ken, Japan; Graduate School of Science and Engineerring, Saitama University, Saitama, Saitama-ken, Japan
| | - K Komatsu
- Saitama Cancer Center, Ina, Kita-adachi-gun, Saitama-ken, Japan; Graduate School of Science and Engineerring, Saitama University, Saitama, Saitama-ken, Japan
| | - K Takai
- Saitama Cancer Center, Ina, Kita-adachi-gun, Saitama-ken, Japan; Graduate School of Science and Engineerring, Saitama University, Saitama, Saitama-ken, Japan
| | - K Inoue
- Saitama Cancer Center, Ina, Kita-adachi-gun, Saitama-ken, Japan; Graduate School of Science and Engineerring, Saitama University, Saitama, Saitama-ken, Japan
| | - H Matsumoto
- Saitama Cancer Center, Ina, Kita-adachi-gun, Saitama-ken, Japan; Graduate School of Science and Engineerring, Saitama University, Saitama, Saitama-ken, Japan
| | - Y Hayashi
- Saitama Cancer Center, Ina, Kita-adachi-gun, Saitama-ken, Japan; Graduate School of Science and Engineerring, Saitama University, Saitama, Saitama-ken, Japan
| | - M Tsuboi
- Saitama Cancer Center, Ina, Kita-adachi-gun, Saitama-ken, Japan; Graduate School of Science and Engineerring, Saitama University, Saitama, Saitama-ken, Japan
| | - Y Yamada
- Saitama Cancer Center, Ina, Kita-adachi-gun, Saitama-ken, Japan; Graduate School of Science and Engineerring, Saitama University, Saitama, Saitama-ken, Japan
| | - X Wang
- Saitama Cancer Center, Ina, Kita-adachi-gun, Saitama-ken, Japan; Graduate School of Science and Engineerring, Saitama University, Saitama, Saitama-ken, Japan
| | - M Suganuma
- Saitama Cancer Center, Ina, Kita-adachi-gun, Saitama-ken, Japan; Graduate School of Science and Engineerring, Saitama University, Saitama, Saitama-ken, Japan
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Kubo K, Hamahata A, Tozuka K, Tsuboi M, Hayashi Y, Takai K, Saito T, Sakurai H, Matsumoto H. Abstract P4-13-11: A complication analysis between complete and partial tissue expander coverage using autologous flaps in cases of immediate breast reconstruction. Cancer Res 2018. [DOI: 10.1158/1538-7445.sabcs17-p4-13-11] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Background:
To avoid tissue expander exposure following mastectomy flap necrosis, several methods for covering expander by autologous flap in cases of immediate breast reconstruction have been reported. These methods are classified into two groups, complete or partial expander coverage. Two methods have potential risks of postoperative complications following: insufficient lower pole expansion and cranial migration in complete coverage methods, and lateral migration in partial coverage methods. However, the comparisons of complication rates between these two methods have not been reported. This study aims to compare the incidence of expander exposure following mastectomy flap necrosis and expander migration between two methods.
Methods:
A retrospective review of 93 patients (99 breasts) who underwent immediate expander-based breast reconstruction was performed. Patients were divided into two groups, complete or partial expander coverage by autologous flaps. In both groups, expanders were placed into subpectral position. In partial coverage group, the lateral borders of pectralis major muscles were sutured to the mastectomy skin flaps. If the skin flap was too thin to be sutured, the serratus anterior muscro-fascial flap was dissected and sutured to the lateral border of pectralis major muscle to cover the expander completely. Allograft products were not used in both groups. Demographics, intraoperative findings, and postoperative complications were compared between two groups.
Results:
Of the 99 breasts, 56 underwent complete expander coverage and 43 underwent partial coverage. Mastectomy flap necrosis rate was higher in the complete coverage group (Complete 14.3% versus Partial 0%; p=0.0091), however, there was no incidence of expander exposure in both groups. Lateral migration rate was higher in the partial coverage group (Complete 0% versus Partial 9.3%; p=0.033). There was no difference in cranial migration rate between two groups (Complete 12.5% versus Partial 2.3%; p=0.133).
Conclusions:
The thinness of the mastectomy flaps was considered to provide the higher incidence of mastectomy flap necrosis in the complete coverage group. The complete expander coverage reduced lateral migration rate and prevented expander exposure in cases of mastectomy flap necrosis.
Citation Format: Kubo K, Hamahata A, Tozuka K, Tsuboi M, Hayashi Y, Takai K, Saito T, Sakurai H, Matsumoto H. A complication analysis between complete and partial tissue expander coverage using autologous flaps in cases of immediate breast reconstruction [abstract]. In: Proceedings of the 2017 San Antonio Breast Cancer Symposium; 2017 Dec 5-9; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2018;78(4 Suppl):Abstract nr P4-13-11.
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Affiliation(s)
- K Kubo
- Saitama Cancer Center, 780 Komuro, Ina, Kita-Adachi, Saitama, Japan; Tokyo Women's Medical University, 8-1 Kawada-cho, Shinjuku-ku, Tokyo, Japan
| | - A Hamahata
- Saitama Cancer Center, 780 Komuro, Ina, Kita-Adachi, Saitama, Japan; Tokyo Women's Medical University, 8-1 Kawada-cho, Shinjuku-ku, Tokyo, Japan
| | - K Tozuka
- Saitama Cancer Center, 780 Komuro, Ina, Kita-Adachi, Saitama, Japan; Tokyo Women's Medical University, 8-1 Kawada-cho, Shinjuku-ku, Tokyo, Japan
| | - M Tsuboi
- Saitama Cancer Center, 780 Komuro, Ina, Kita-Adachi, Saitama, Japan; Tokyo Women's Medical University, 8-1 Kawada-cho, Shinjuku-ku, Tokyo, Japan
| | - Y Hayashi
- Saitama Cancer Center, 780 Komuro, Ina, Kita-Adachi, Saitama, Japan; Tokyo Women's Medical University, 8-1 Kawada-cho, Shinjuku-ku, Tokyo, Japan
| | - K Takai
- Saitama Cancer Center, 780 Komuro, Ina, Kita-Adachi, Saitama, Japan; Tokyo Women's Medical University, 8-1 Kawada-cho, Shinjuku-ku, Tokyo, Japan
| | - T Saito
- Saitama Cancer Center, 780 Komuro, Ina, Kita-Adachi, Saitama, Japan; Tokyo Women's Medical University, 8-1 Kawada-cho, Shinjuku-ku, Tokyo, Japan
| | - H Sakurai
- Saitama Cancer Center, 780 Komuro, Ina, Kita-Adachi, Saitama, Japan; Tokyo Women's Medical University, 8-1 Kawada-cho, Shinjuku-ku, Tokyo, Japan
| | - H Matsumoto
- Saitama Cancer Center, 780 Komuro, Ina, Kita-Adachi, Saitama, Japan; Tokyo Women's Medical University, 8-1 Kawada-cho, Shinjuku-ku, Tokyo, Japan
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Kiguchi T, Sato C, Takai K, Nakai Y, Kaneko Y, Matsuki M. CT findings in 11 patients with TAFRO syndrome: a variant of multicentric Castleman's disease. Clin Radiol 2017. [DOI: 10.1016/j.crad.2017.05.007] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Hasegawa E, Sato H, Wada Y, Takai K, Wakamatsu A, Nozawa Y, Nakatsue T, Kuroda T, Suzuki Y, Nakano M, Narita I. Characterization of patients with systemic lupus erythematosus who meet the diagnostic criteria for TAFRO syndrome. Lupus 2017; 27:417-427. [DOI: 10.1177/0961203317725589] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Purpose TAFRO syndrome is a novel disorder manifesting as fever, anasarca, thrombocytopenia, renal insufficiency and organomegaly, and its etiology has not been clarified. The aim of this study was to elucidate similarities and differences between systemic lupus erythematosus (SLE) and TAFRO syndrome. Methods We examined 46 consecutive patients diagnosed with SLE and determined whether they meet the proposed diagnostic criteria for TAFRO syndrome (2015 version). Results Of the 46 patients with SLE, four (8.7%) also met the TAFRO syndrome criteria (TAFRO-like group). All patients in the TAFRO-like group were males, and their mean age was significantly higher than that of the non-TAFRO group (67.5 ± 8.7 vs. 39.3 ± 18.1 years, p = 0.004). C-reactive protein and γ-glutamyl transpeptidase levels were significantly higher, and frequencies of anti-dsDNA and anti-Sm antibodies were significantly lower in the TAFRO-like than non-TAFRO group. Elder cases (onset age ≥ 50 years) met significantly more categories of the diagnostic criteria for TAFRO syndrome than did those with younger cases. Conclusions Several patients with SLE, especially elder cases, showed features similar to those of TAFRO syndrome. Although exclusion of SLE is needed in the diagnostic criteria for TAFRO syndrome, TAFRO syndrome-like SLE should be considered.
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Affiliation(s)
- E Hasegawa
- Division of Clinical Nephrology and Rheumatology, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
| | - H Sato
- Division of Clinical Nephrology and Rheumatology, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
- Health Administration Center, Niigata University, Niigata, Japan
| | - Y Wada
- Division of Clinical Nephrology and Rheumatology, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
| | - K Takai
- Division of Hematology, Niigata City General Hospital, Niigata, Japan
| | - A Wakamatsu
- Division of Clinical Nephrology and Rheumatology, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
| | - Y Nozawa
- Division of Clinical Nephrology and Rheumatology, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
| | - T Nakatsue
- Division of Clinical Nephrology and Rheumatology, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
| | - T Kuroda
- Health Administration Center, Niigata University, Niigata, Japan
| | - Y Suzuki
- Health Administration Center, Niigata University, Niigata, Japan
| | - M Nakano
- Department of Medical Technology, School of Health Sciences, Faculty of Medicine, Niigata University, Niigata, Japan
| | - I Narita
- Health Administration Center, Niigata University, Niigata, Japan
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Kikuchi S, Makita H, Konno U, Shiraishi F, Ijiri A, Takai K, Maeda M, Takahashi Y. Limited reduction of ferrihydrite encrusted by goethite in freshwater sediment. Geobiology 2016; 14:374-389. [PMID: 27027643 DOI: 10.1111/gbi.12181] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/21/2015] [Accepted: 01/18/2016] [Indexed: 06/05/2023]
Abstract
Many physical and chemical processes control the extent of Fe(III) oxyhydroxide reduction by dissimilatory Fe(III)-reducing bacteria. The surface precipitation of secondary Fe minerals on Fe(III) oxyhydroxides limits the extent of microbial Fe(III) reduction, but this phenomenon has not yet been observed in nature. This paper reports the observation of secondary Fe-mineral (goethite) encrustation on ferrihydrite surface within freshwater sediment up to 10 cm deep. The sediment surface was characterized by the predominance of ferrihydrites with biogenic stalks and sheaths. An Fe(II)-oxidizing bacterium (Gallionellaceae) was detected by 16S rRNA gene analysis at sediment depths of 1 and 2 cm. Fe(2+) concentration in the sediment pore water was relatively higher at 2-4 cm depths. The 16S rRNA genes affiliated with dissimilatory Fe(III)-reducing bacteria were detected at 1, 2, and 4 cm depths. The results of the Fe K-edge extended X-ray absorption fine structure (EXAFS) analysis suggested the presence of goethite and siderite at depths below 3 cm. However, the change in the Fe-mineral composition was restricted to sediment depths between 3 and 4 cm, despite the presence of abundant ferrihydrite at depths below 4 cm. An increase in CH4 concentration was observed at deeper than 6 cm. Stable isotopic analysis of CH4 in the pore water indicated that acetoclastic CH4 occurred at depths below 7 cm. Transmission electron microscope observations suggested the presence of goethite and siderite on stalks and sheaths at depths below 3 cm. Results from conversion electron yield EXAFS analysis suggested that goethite dominated at 10 cm depth, thereby indicating that ferrihydrite was encrusted by goethite at this depth. Moreover, the incomplete reduction of ferrihydrite below depths of 4 cm was not due to the lack of organic carbon, but was possibly due to the surface encrustation of goethite on ferrihydrite.
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Affiliation(s)
- S Kikuchi
- Department of Earth and Planetary Systems Science, Graduate School of Science, Hiroshima University, Higashi-Hiroshima, Hiroshima, Japan
- Project Team for Development of New-Generation Research Protocol for Submarine Resources, Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Yokosuka, Japan
| | - H Makita
- Department of Subsurface Geobiological Analysis and Research (d-SUGAR), Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Yokosuka, Japan
| | - U Konno
- Department of Subsurface Geobiological Analysis and Research (d-SUGAR), Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Yokosuka, Japan
| | - F Shiraishi
- Department of Earth and Planetary Systems Science, Graduate School of Science, Hiroshima University, Higashi-Hiroshima, Hiroshima, Japan
| | - A Ijiri
- Kochi Institute for Core Sample Research, Agency for Marine-Earth Science and Technology (JAMSTEC), Nankoku, Kochi, Japan
| | - K Takai
- Department of Subsurface Geobiological Analysis and Research (d-SUGAR), Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Yokosuka, Japan
| | - M Maeda
- Department of Technical Center, Hiroshima University, Higashi-Hiroshima, Japan
| | - Y Takahashi
- Department of Earth and Planetary Systems Science, Graduate School of Science, Hiroshima University, Higashi-Hiroshima, Hiroshima, Japan
- Department of Earth and Planetary Science, The University of Tokyo, Bunkyo-ku, Tokyo, Japan
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Hosono K, Kuwasaki T, Inagawa T, Takai K, Nakashima H, Saito T, Yamamoto N, Takaku H. Properties and Anti-Hiv Activity of Hairpin Antisense Oligonucleotides Containing 2′-Methoxynucleosides with Base-Pairing in the Stem Region at the 3′-End. ACTA ACUST UNITED AC 2016. [DOI: 10.1177/095632029600700205] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
A new type of hairpin antisense oligodeoxyribo-nucleotide, containing 2′-methoxynucleosides with base-pairing in the stem region at the 3′-end, was tested for 3′-exonuclease resistance and anti-HIV activity. An increased resistance to nuclease degradation has been observed by incubation of the hairpin oligo-nucleotides with DNA polymerase and foetal bovine serum. Of particular interest is the hairpin antisense oligonucleotide containing 2′-methoxynucleosides with base-pairing in the stem region at the 3′-end, which has increased nuclease resistance and hybridizes effectively with a complementary RNA. Furthermore, these compounds were assayed for inhibition of virus replication in HIV-1 infected MT-4 cells. In the anti-HIV activity test, the hairpin oligonucleotide phosphorothioate derivatives showed higher anti-HIV activities compared to their linear counterparts.
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Affiliation(s)
- K. Hosono
- Department of Industrial Chemistry, Chiba Institute of Technology, Narashino, Chiba 275, Japan
| | - T. Kuwasaki
- Department of Industrial Chemistry, Chiba Institute of Technology, Narashino, Chiba 275, Japan
| | - T. Inagawa
- Department of Industrial Chemistry, Chiba Institute of Technology, Narashino, Chiba 275, Japan
- Department of Microbiology, Yamanashi Medical University, Nakakoma-gun, Yamanashi, 409-38, Japan
| | - K. Takai
- Department of Industrial Chemistry, Chiba Institute of Technology, Narashino, Chiba 275, Japan
| | - H. Nakashima
- Department of Microbiology, Yamanashi Medical University, Nakakoma-gun, Yamanashi, 409-38, Japan
| | - T. Saito
- Health Science Laboratories, Yamanouchi Pharmaceutical Co. Ltd., Nihonbashi-Honcho, Chuo-ku, Tokyo 103, Japan
| | - N. Yamamoto
- Department of Microbiology, Tokyo Medical and Dental University School of Medicine, Yushima, Bunkyo-ku, Tokyo 113, Japan
| | - H. Takaku
- Department of Industrial Chemistry, Chiba Institute of Technology, Narashino, Chiba 275, Japan
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Kurozumi S, Inoue K, Matsumoto H, Hayashi Y, Tozuka K, Kubo K, Komatsu K, Takai K, Nagai SE, Oba H, Horiguchi J, Takeyoshi I, Kurosumi M. Abstract P4-14-17: Prognostic value of tumor-infiltrating lymphocytes in residual tumors after neoadjuvant chemotherapy concomitant with trastuzumab for HER2-positive breast cancer. Cancer Res 2016. [DOI: 10.1158/1538-7445.sabcs15-p4-14-17] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Background:
Neoadjuvant chemotherapy (NAC) with taxanes, followed by fluorouracil, epirubicin, and cyclophosphamide (FEC), with concurrent trastuzumab is known to achieve a high pCR rate of more than 60% for HER2-positive breast cancer (BC) as well as good prognoses in those obtaining pCR. On the other hand, the prognostic significance of tumor-infiltrating lymphocytes (TILs) has recently been described in triple-negative BC. However, the prognostic and predictive values of TILs in HER2-positive BC remain unclear. In the present study, we examined the grades of TILs in pre-treatment cancer tissues and residual tumors after NAC with trastuzumab, and also investigated its predictive utility for pCR and prognostic power for HER2-positive BC.
Patients and Methods:
A total of 128 Japanese women with HER2-positive BC received either paclitaxel or docetaxel followed by FEC, with concomitant trastuzumab. The proportional grades of stromal (Str)-TILs in pre-treatment biopsy specimens and residual tumors after NAC with trastuzumab were determined as follows: low grade (0-10%), intermediate grade (10-40%), and high grade (40-90%), using the criteria of the International Working Group for TILs in BC. Analysis 1: The relationship between the grades of Str-TILs in pre-treatment tumors and pCR rates was investigated. Relapse-free survival (RFS) and cancer-specific survival (CSS) were analyzed for a correlation with pre-treatment Str-TILs. Analysis 2: Alterations in the grade of Str-TILs were examined in the residual tumors of non-pCR patients, and RFS and CSS were analyzed for a correlation with residual Str-TILs.
Results:
pCR was achieved in 83 out of the 128 patients (pCR rate, 64.8%) who received NAC with trastuzumab, and RFS was significantly better in the pCR group than in the non-pCR group (p = 0.0071). Analysis 1: The patient distribution of the Str-TILs grade in pre-treatment tumors was as follows: high: 24 (18.8%); intermediate: 38 (29.7%); and low: 66 (51.6%). pCR rates correlated with the Str-TILs grade in pre-treatment tumors: 83.3% in the high group, 71.1% in the intermediate group, and 54.5% in the low group (p = 0.026); however, the Str-TILs grade in pre-treatment tumors did not correlate with survival. Analysis 2: In 45 non-pCR patients, the distribution of the Str-TILs grade in residual tumors was as follows: high: 9 (20.0%); intermediate: 8 (17.8%); and low: 28 (62.2%), respectively. In non-pCR patients, the rate of a high Str-TILs grade was greater in residual tumors than in pre-treatment tumors (residual, 20.0%, pre-treatment, 8.9%). RFS was significantly better with a high grade than with a low grade of residual Str-TILs (p = 0.033).
Conclusions:
The status of TILs in pre-treatment tumors predicted responses to NAC concomitant with trastuzumab in HER2-positive BC. The grade of TILs was higher in residual tumors than in pre-treatment tumors, and, among non-pCR patients, the prognosis of patients with a high residual-TILs grade was better prognosis than that of patients with a low residual-TILs grade. We speculate that an examination of TILs in residual tumors after NAC with trastuzumab may be necessary for selecting patients with a good prognosis from non-pCR patients.
Citation Format: Kurozumi S, Inoue K, Matsumoto H, Hayashi Y, Tozuka K, Kubo K, Komatsu K, Takai K, Nagai SE, Oba H, Horiguchi J, Takeyoshi I, Kurosumi M. Prognostic value of tumor-infiltrating lymphocytes in residual tumors after neoadjuvant chemotherapy concomitant with trastuzumab for HER2-positive breast cancer. [abstract]. In: Proceedings of the Thirty-Eighth Annual CTRC-AACR San Antonio Breast Cancer Symposium: 2015 Dec 8-12; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2016;76(4 Suppl):Abstract nr P4-14-17.
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Affiliation(s)
- S Kurozumi
- Division of Breast Surgery, Saitama Cancer Center, Saitama, Japan; Division of Breast Oncology, Saitama Cancer Center, Saitama, Japan; Saitama Cancer Center, Saitama, Japan; Gunma University Graduate School of Medicine, Gunma, Japan
| | - K Inoue
- Division of Breast Surgery, Saitama Cancer Center, Saitama, Japan; Division of Breast Oncology, Saitama Cancer Center, Saitama, Japan; Saitama Cancer Center, Saitama, Japan; Gunma University Graduate School of Medicine, Gunma, Japan
| | - H Matsumoto
- Division of Breast Surgery, Saitama Cancer Center, Saitama, Japan; Division of Breast Oncology, Saitama Cancer Center, Saitama, Japan; Saitama Cancer Center, Saitama, Japan; Gunma University Graduate School of Medicine, Gunma, Japan
| | - Y Hayashi
- Division of Breast Surgery, Saitama Cancer Center, Saitama, Japan; Division of Breast Oncology, Saitama Cancer Center, Saitama, Japan; Saitama Cancer Center, Saitama, Japan; Gunma University Graduate School of Medicine, Gunma, Japan
| | - K Tozuka
- Division of Breast Surgery, Saitama Cancer Center, Saitama, Japan; Division of Breast Oncology, Saitama Cancer Center, Saitama, Japan; Saitama Cancer Center, Saitama, Japan; Gunma University Graduate School of Medicine, Gunma, Japan
| | - K Kubo
- Division of Breast Surgery, Saitama Cancer Center, Saitama, Japan; Division of Breast Oncology, Saitama Cancer Center, Saitama, Japan; Saitama Cancer Center, Saitama, Japan; Gunma University Graduate School of Medicine, Gunma, Japan
| | - K Komatsu
- Division of Breast Surgery, Saitama Cancer Center, Saitama, Japan; Division of Breast Oncology, Saitama Cancer Center, Saitama, Japan; Saitama Cancer Center, Saitama, Japan; Gunma University Graduate School of Medicine, Gunma, Japan
| | - K Takai
- Division of Breast Surgery, Saitama Cancer Center, Saitama, Japan; Division of Breast Oncology, Saitama Cancer Center, Saitama, Japan; Saitama Cancer Center, Saitama, Japan; Gunma University Graduate School of Medicine, Gunma, Japan
| | - SE Nagai
- Division of Breast Surgery, Saitama Cancer Center, Saitama, Japan; Division of Breast Oncology, Saitama Cancer Center, Saitama, Japan; Saitama Cancer Center, Saitama, Japan; Gunma University Graduate School of Medicine, Gunma, Japan
| | - H Oba
- Division of Breast Surgery, Saitama Cancer Center, Saitama, Japan; Division of Breast Oncology, Saitama Cancer Center, Saitama, Japan; Saitama Cancer Center, Saitama, Japan; Gunma University Graduate School of Medicine, Gunma, Japan
| | - J Horiguchi
- Division of Breast Surgery, Saitama Cancer Center, Saitama, Japan; Division of Breast Oncology, Saitama Cancer Center, Saitama, Japan; Saitama Cancer Center, Saitama, Japan; Gunma University Graduate School of Medicine, Gunma, Japan
| | - I Takeyoshi
- Division of Breast Surgery, Saitama Cancer Center, Saitama, Japan; Division of Breast Oncology, Saitama Cancer Center, Saitama, Japan; Saitama Cancer Center, Saitama, Japan; Gunma University Graduate School of Medicine, Gunma, Japan
| | - M Kurosumi
- Division of Breast Surgery, Saitama Cancer Center, Saitama, Japan; Division of Breast Oncology, Saitama Cancer Center, Saitama, Japan; Saitama Cancer Center, Saitama, Japan; Gunma University Graduate School of Medicine, Gunma, Japan
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Bogdanov KV, Osipov VY, Zhukovskaya MV, Jentgens C, Treussart F, Hayashi T, Takai K, Fedorov AV, Baranov AV. Size-dependent Raman and SiV-center luminescence in polycrystalline nanodiamonds produced by shock wave synthesis. RSC Adv 2016. [DOI: 10.1039/c6ra09317e] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
30 × 30 nm TEM image of diamond polycrystal consisting cubic nanodiamonds of different orientation doped by luminescent SiV centers with luminescent intensity depended on mean size of the polycrystals.
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Affiliation(s)
| | - V. Yu. Osipov
- Ioffe Physical-Technical Institute
- Saint-Petersburg 194021
- Russia
| | | | | | - F. Treussart
- Laboratoire Aimé Cotton
- CNRS
- Univ. Paris-Sud
- ENS Cachan
- Université Paris Saclay
| | - T. Hayashi
- Faculty of Engineering
- Shinshu University
- Nagano 380-8553
- Japan
| | - K. Takai
- Department of Chemical Science and Technology
- Hosei University
- Tokyo 184-8584
- Japan
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14
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Hirahara N, Matsubara T, Hayashi H, Takai K, Fujii Y, Tajima Y. Impact of inflammation-based prognostic score on survival after curative thoracoscopic esophagectomy for esophageal cancer. Eur J Surg Oncol 2015; 41:1308-15. [DOI: 10.1016/j.ejso.2015.07.008] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2015] [Revised: 05/09/2015] [Accepted: 07/09/2015] [Indexed: 01/06/2023] Open
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15
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Kikuchi S, Makita H, Takai K, Yamaguchi N, Takahashi Y. Characterization of biogenic iron oxides collected by the newly designed liquid culture method using diffusion chambers. Geobiology 2014; 12:133-145. [PMID: 24382149 DOI: 10.1111/gbi.12073] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/09/2013] [Accepted: 12/04/2013] [Indexed: 06/03/2023]
Abstract
We designed a new culture method for neutrophilic iron-oxidizing bacteria using liquid medium (i) to study the formation and mineralogical characteristics of biogenic iron oxides (BIOS) and (ii) to apply BIOS to various scientific and engineering applications. An iron-oxidizing bacterium, Mariprofundus ferrooxydans PV-1(T) (ATCC, BAA-1020), was cultured using a set of diffusion chambers to prepare a broad anoxic-oxic interface, upon which BIOS formation is typically observed in natural environments. Iron oxide precipitates were generated in parallel with bacterial growth. A scanning electron microscopy analysis indicated that the morphological features of the iron oxide precipitates in the medium (in vitro BIOS) were similar to those of BIOS collected from natural deep-sea hydrothermal environments in the Northwest Eifuku Seamount field in the northern Mariana Arc (in situ BIOS). Further chemical speciation of both the in vitro and in situ BIOS was examined with X-ray absorption fine structure (XAFS). A bulk XAFS analysis showed that the minerals in both BIOS were mainly ferrihydrite and oligomeric stages of amorphous iron oxyhydroxides with edge-sharing octahedral linkages. The amount of in vitro BIOS produced with the diffusion-chamber method was greater than those produced previously with other culture methods, such as gel-stabilized gradient and batch liquid culture methods. The larger yields of BIOS produced with the new culture method will allow us to clarify in the future the mineralization mechanisms during bacterial growth and to examine the physicochemical properties of BIOS, such as their adsorption to and coprecipitation with various elements and substances.
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Affiliation(s)
- S Kikuchi
- Department of Earth and Planetary Systems Science, Graduate School of Science, Hiroshima University, Higashi-Hiroshima, Hiroshima, Japan
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16
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Kader MA, Islam MR, Parveen M, Haniu H, Takai K. Pyrolysis decomposition of tamarind seed for alternative fuel. Bioresour Technol 2013; 149:1-7. [PMID: 24084198 DOI: 10.1016/j.biortech.2013.09.032] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2013] [Revised: 09/05/2013] [Accepted: 09/06/2013] [Indexed: 06/02/2023]
Abstract
The conversion of tamarind seed into bio-oil by pyrolysis has been taken into consideration in the present work. The major components of the system were fixed bed fire-tube heating reactor, liquid condenser and collector. The crushed tamarind seed in particle form was pyrolyzed in an electrically heated fixed bed reactor. The products were liquid, char and gasses. The parameters varied were reactor temperature, running time, gas flow rate and feed particle size. The maximum liquid yield was 45 wt% at 400°C for a feed size of 3200 μm diameter at a gas flow rate of 6l/min with a running time of 30 min. The obtained pyrolysis liquid at these optimum process conditions were analyzed for physical and chemical properties to be used as an alternative fuel. The results show the potential of tamarind seed as an important source of alternative fuel and chemicals as well.
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Affiliation(s)
- M A Kader
- Department of Mechanical Engineering, Rajshahi University of Engineering & Technology, Rajshahi 6204, Bangladesh.
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17
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Lee JH, Takai K, Ota M, Shimizu T, Komori T, Taniguchi M. Isolated neurosarcoidosis in the medulla oblongata involving the fourth ventricle: a case report. Br J Neurosurg 2012; 27:393-5. [PMID: 23167667 DOI: 10.3109/02688697.2012.741736] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
We report a 61-year-old woman with definite diagnosis of isolated neurosarcoidosis in the medulla oblongata involving the fourth ventricle. We could not recognize neurosarcoidosis as one of the differential diagnoses of the lesion before biopsy because the brainstem lesion location and periventricular lesion configuration were quite unusual.
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Affiliation(s)
- J H Lee
- Department of Neurosurgery, Tokyo Metropolitan Neurological Hospital, Tokyo, Japan
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18
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Shimizu J, Takai K, Fujiwara N, Arimitsu N, Ueda Y, Wakisaka S, Yoshikawa H, Kaneko F, Suzuki T, Suzuki N. Excessive CD4+ T cells co-expressing interleukin-17 and interferon-γ in patients with Behçet's disease. Clin Exp Immunol 2012; 168:68-74. [PMID: 22385240 DOI: 10.1111/j.1365-2249.2011.04543.x] [Citation(s) in RCA: 73] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
Excessive T helper type 1 (Th1) cell activity has been reported in Behçet's disease (BD). Recently, association of Th17 cells with certain autoimmune diseases was reported, and we thus investigated circulating Th17 cells in BD. CD4(+) CD45RO(-) (naive) T cells were cultured with Th0-, Th1-, Th2- and Th17-related cytokines and antibodies, and their mRNA was studied by real-time polymerase chain reaction (PCR). When naive CD4(+) T cells were cultured with Th1- and Th17-related cytokines, interferon (IFN)-γ mRNA and interleukin (IL)-17 mRNA were up-regulated, respectively, in BD patients. Naive CD4(+) T cells cultured in a Th17 cell-inducing condition expressed IL-23 receptor (IL-23R) mRNA excessively. IL-17 mRNA expression was induced only when naive CD4(+) T cells were cultured in the presence of IL-23. CD4(+) T cells cultured with Th17 cytokines expressed excessive RAR-related orphan receptor C (RORC) mRNA. Using intracellular cytokine staining, we found that CD45RO(+) (memory) CD4(+) T cells producing IL-17 and IFN-γ simultaneously were increased significantly. Memory CD4(+) T cells producing IFN-γ but not IL-17 decreased profoundly in BD patients. CD4(+) T cells producing IL-17 and IFN-γ simultaneously were found in BD skin lesions. Collectively, we found excessive CD4(+) T cells producing IL-17 and IFN-γ (Th1/Th17) cells in patients with BD, and possible involvement of IL-23/IL-23R pathway for the appearance of excessive Th1/Th17 cells.
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Affiliation(s)
- J Shimizu
- Department of Immunology and Medicine, St Marianna University School of Medicine, Sugao 2-16-1, Kawasaki, Japan
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19
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Shimizu J, Izumi T, Arimitsu N, Fujiwara N, Ueda Y, Wakisaka S, Yoshikawa H, Kaneko F, Suzuki T, Takai K, Suzuki N. Skewed TGFβ/Smad signalling pathway in T cells in patients with Behçet's disease. Clin Exp Rheumatol 2012; 30:S35-S39. [PMID: 22935165] [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] [Received: 11/07/2011] [Accepted: 07/06/2012] [Indexed: 06/01/2023]
Abstract
OBJECTIVES Behçet's disease (BD) is a multi-systemic inflammatory disease, characterised by recurrent oral aphthosis, genital ulcers, skin lesions and uveitis. We have reported excessive Th1 cell activity in patients with BD. More recently, Th17 cells were suggested to associate with several autoimmune diseases. This study was designed to investigate the role of Th17 related cytokines and signalling molecules in patients with BD. METHODS We examined mRNA expressions of Th1 and Th17 related cytokines and related signalling molecules in PBMC of 12 patients with BD and 14 normal controls (NC) using quantitative RT-PCR. We studied expressions of the Th17 related cytokines in other four BD patients' skin lesions by immunofluorescence. RESULTS Major Th17 related cytokines were not detected in unstimulated PBMC in patients with BD. After stimulation, mRNA expressions of TGFβ receptor type 1, IL-12 receptor β2 and suppressor of cytokine signalling protein (SOCS) 1 on PBMC were significantly enhanced in patients with BD, as compared with NC (p<0.05). mRNA expression of RORC, a key transcription factor for Th17 cell differentiation, was comparable between BD and NC. CD4+ T cells infiltrating into BD skin lesion expressed TGFβ1 much more than those infiltrating into non-Behçet's disease erythema nodosum. CONCLUSIONS These findings suggest that TGFβ/Smad signalling pathway of T cells is overactive in patients with BD.
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Affiliation(s)
- J Shimizu
- Department of Immunology and Medicine, St. Marianna University School of Medicine, Kawasaki 216-8511, Japan
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20
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Islam MR, Joardder MUH, Hasan SM, Takai K, Haniu H. Feasibility study for thermal treatment of solid tire wastes in Bangladesh by using pyrolysis technology. Waste Manag 2011; 31:2142-2149. [PMID: 21680169 DOI: 10.1016/j.wasman.2011.04.017] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2010] [Revised: 03/04/2011] [Accepted: 04/21/2011] [Indexed: 05/30/2023]
Abstract
In this study on the basis of lab data and available resources in Bangladesh, feasibility study has been carried out for pyrolysis process converting solid tire wastes into pyrolysis oils, solid char and gases. The process considered for detailed analysis was fixed-bed fire-tube heating pyrolysis reactor system. The comparative techno-economic assessment was carried out in US$ for three different sizes plants: medium commercial scale (144 tons/day), small commercial scale (36 tons/day), pilot scale (3.6 tons/day). The assessment showed that medium commercial scale plant was economically feasible, with the lowest unit production cost than small commercial and pilot scale plants for the production of crude pyrolysis oil that could be used as boiler fuel oil and for the production of upgraded liquid-products.
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Affiliation(s)
- M R Islam
- Department of Mechanical Engineering, Rajshahi University of Engineering and Technology, Rajshahi 6204, Bangladesh.
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21
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Sumanasekera GU, Chen G, Takai K, Joly J, Kobayashi N, Enoki T, Eklund PC. Charge transfer and weak chemisorption of oxygen molecules in nanoporous carbon consisting of a disordered network of nanographene sheets. J Phys Condens Matter 2010; 22:334208. [PMID: 21386498 DOI: 10.1088/0953-8984/22/33/334208] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
The adsorption/desorption processes of oxygen are investigated in nanoporous carbon (activated carbon fiber (ACF)) consisting of a disordered network of nanographene sheets. The heat-induced desorption at 200 °C shows the decomposition of oxygen-including functional groups weakly bonded to nanographene edges. The removal of these oxygen-including negatively charged functional groups brings about a change in the type of majority carriers, from holes to electrons, through charge transfer from the functional groups to the interior of nanographene sheets. The oxygen adsorption brings ACF back to the electronic state with holes being majority carriers. In this process, a large concentration of negatively charged O(2)(δ-) molecules with δ ∼ 0.1 are created through charge transfer from nanographene sheets to the adsorbed oxygen molecules. The changes in the thermoelectric power and the electrical resistance in the oxygen desorption process is steeper than that in the oxygen adsorption process. This suggests the irreversibility between the two processes.
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Affiliation(s)
- G U Sumanasekera
- Department of Physics, Pennsylvania State University, University Park, PA 16802, USA
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22
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Egawa H, Ozawa K, Takada Y, Teramukai S, Mori A, Ogawa K, Kaido T, Fujimoto Y, Kawaguchi Y, Hatano E, Sato H, Ono M, Takai K, Tanaka K, Uemoto S. Coupled regulation of interleukin-12 receptor beta-1 of CD8+ central memory and CCR7-negative memory T cells in an early alloimmunity in liver transplant recipients. Clin Exp Immunol 2010; 160:420-30. [PMID: 20345976 DOI: 10.1111/j.1365-2249.2010.04117.x] [Citation(s) in RCA: 4] [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] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
This study investigated how CD8(+) T cell subsets respond to allo- and infectious immunity after living donor liver transplantation (LDLT). Early alloimmunity: 56 recipients were classified into three types according to the post-transplant course; type I demonstrated uneventful post-transplant course, type II developed severe sepsis leading to multiple organ dysfunction syndrome or retransplantation and type III with acute rejection. In 23 type I recipients, the interleukin (IL)-12 receptor beta-1 (R beta 1)(+) cells of central memory T cells (Il-12R beta 1(+) T(CM)) were increased above the pretransplant level. In 16 type II recipients, IL-12R beta 1(+) T(CM) was decreased markedly below the pretransplant level on postoperative day (POD) 5. In 17 type III recipients, IL-12R beta 1(+) T(CM) was decreased for a more prolonged period until POD 10. Along with down-regulation of IL-12R beta 1(+) T(CM), the IL-12R beta 1(+) cells of CCR7-negative subsets (CNS) as well as perforin, interferon (IFN)-gamma and tumour necrosis factor (TNF)-alpha decreased gradually, resulting in the down-regulation of effectors and cytotoxicity. The down-regulation of IL-12R beta 1(+) T(CM) was suggested to be due to the recruitment of alloantigen-primed T cells into the graft, and then their entry into the secondary lymphoid organ, resulting in graft destruction. Infectious immunity: immunocompetent memory T cells with the capacity to enhance effectors and cytotoxicity were generated in response to post-transplant infection along with both up-regulation of the IL-12R beta 1(+) T(CM) and an increase in the CNS showing the highest level of IL-12R beta 1(+) cells. In conclusion, this work demonstrated that the IL-12R beta 1(+) cells of T(CM) and CNS are regulated in a tightly coupled manner and that expression levels of IL-12R beta 1(+) T(CM) play a crucial role in controlling allo- and infectious immunity.
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Affiliation(s)
- H Egawa
- Department of Surgery, Graduate School of Medicine, Kyoto University, Tokyo, Japan
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Imachi H, Sakai S, Nagai H, Yamaguchi T, Takai K. Methanofollis ethanolicus sp. nov., an ethanol-utilizing methanogen isolated from a lotus field. Int J Syst Evol Microbiol 2009; 59:800-5. [DOI: 10.1099/ijs.0.003731-0] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
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Oya S, Yoshikawa G, Takai K, Tanaka JI, Higashiyama S, Saito N, Kirino T, Kawahara N. Attenuation of Notch signaling promotes the differentiation of neural progenitors into neurons in the hippocampal CA1 region after ischemic injury. Neuroscience 2008; 158:683-92. [PMID: 19017538 DOI: 10.1016/j.neuroscience.2008.10.043] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2008] [Revised: 09/29/2008] [Accepted: 10/28/2008] [Indexed: 12/13/2022]
Abstract
Intercellular signaling via cell-surface Notch receptors controls the cell-fate decision in the developing brain. Recent studies have suggested that the response of endogenous neural stem cells to brain injury in adult mammals might be mediated by Notch signaling. Here, we investigated the role of Notch signaling in ischemic damage in the hippocampal CA1 region after transient global ischemia in rats. In the acute phase of ischemia, Notch1-positive cells increased in number in the posterior periventricle, which is the posterior part of the lateral ventricle, after the i.c.v. administration of epidermal growth factor and fibroblast growth factor-2. In addition, Notch signaling was upregulated in the CA1 region 5 days after ischemia. By contrast, the attenuation of Notch signaling caused by the administration of a gamma-secretase inhibitor in the subacute phase (6-12 days after ischemia) amplified the immature migratory neurons 12 days after ischemia, and resulted in an increased number of newly generated neurons in the CA1 after 28 days. Our results suggest that Notch signaling in the CA1 is activated in parallel with the increase of endogenous neural stem cells stimulated by ischemia, and that the attenuation of Notch signaling could induce more efficient differentiation of neural progenitors toward a neuronal lineage.
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Affiliation(s)
- S Oya
- Department of Neurosurgery, Graduate School of Medicine, University of Tokyo, Tokyo 113-8655, Japan
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Imachi H, Sakai S, Hirayama H, Nakagawa S, Nunoura T, Takai K, Horikoshi K. Exilispira thermophila gen. nov., sp. nov., an anaerobic, thermophilic spirochaete isolated from a deep-sea hydrothermal vent chimney. Int J Syst Evol Microbiol 2008; 58:2258-65. [DOI: 10.1099/ijs.0.65727-0] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
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26
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Stott MB, Saito JA, Crowe MA, Dunfield PF, Hou S, Nakasone E, Daughney CJ, Smirnova AV, Mountain BW, Takai K, Alam M. Culture-independent characterization of a novel microbial community at a hydrothermal vent at Brothers volcano, Kermadec arc, New Zealand. ACTA ACUST UNITED AC 2008. [DOI: 10.1029/2007jb005477] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- M. B. Stott
- GNS Science, Extremophile Research Group; Taupo New Zealand
| | - J. A. Saito
- Department of Microbiology; University of Hawaii; Honolulu Hawaii USA
| | - M. A. Crowe
- GNS Science, Extremophile Research Group; Taupo New Zealand
| | - P. F. Dunfield
- GNS Science, Extremophile Research Group; Taupo New Zealand
| | - S. Hou
- Department of Microbiology; University of Hawaii; Honolulu Hawaii USA
| | - E. Nakasone
- Department of Microbiology; University of Hawaii; Honolulu Hawaii USA
| | - C. J. Daughney
- GNS Science, Extremophile Research Group; Taupo New Zealand
| | - A. V. Smirnova
- GNS Science, Extremophile Research Group; Taupo New Zealand
| | - B. W. Mountain
- GNS Science, Extremophile Research Group; Taupo New Zealand
| | - K. Takai
- Subground Animalcule Retrieval Program; Japan Agency for Marine-Earth Science and Technology; Yokosuka Japan
| | - M. Alam
- Department of Microbiology; University of Hawaii; Honolulu Hawaii USA
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Takai K, Takai Y, Koto M, Mitsuya M, Takeda K, Ogawa Y, Ariga H, Sakayauchi T, Nemoto K, Yamada S. Stereotactic Body Radiotherapy for Lung Cancer Under Active Breathing Control: A Comparison of Lung Toxicity With and Without Active Breathing Control. Int J Radiat Oncol Biol Phys 2007. [DOI: 10.1016/j.ijrobp.2007.07.1711] [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: 11/28/2022]
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Koto M, Takai Y, Jingu K, Nemoto K, Ogawa Y, Takai K, Yamada S. Stereo-Tactic Body Radiotherapy Using Dual KV-XRAY On-Board Imaging System for Stage I Non-Small Cell Lung Cancer. Int J Radiat Oncol Biol Phys 2005. [DOI: 10.1016/j.ijrobp.2005.07.695] [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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29
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Kishi Y, Takai K, Akao J, Isoyama N, Matsumura M, Uchiyama K, Tsuchida M, Suga A, Naito K. Two cases of recurrent IgA nephropathy following kidney transplantation. Transplant Proc 2005; 36:2160-1. [PMID: 15518785 DOI: 10.1016/j.transproceed.2004.08.002] [Citation(s) in RCA: 2] [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: 10/26/2022]
Abstract
Recurrence of immunoglobulin (Ig) A nephropathy following kidney transplantation has been described as occurring in 40% to 60% of cases. Although this type of recurrence was considered a benign condition for a long time, more recent data showed that recurrent transplant IgA nephropathy may be a significant contributor to graft loss. We present 2 cases of recurrent IgA nephropathy following kidney transplantation. In case 1, renal function remained stable with a creatinine level of 1.2 mg/dL at 5 months after diagnosis and 61 months after transplantation. In case 2, the patient lost his graft and returned to regular hemodialysis at 36 months after diagnosis and 125 months after kidney transplantation.
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Affiliation(s)
- Y Kishi
- Department of Urology, Yamaguchi University School of Medicine, Ube, Japan
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Abstract
INTRODUCTION In this study, we examined the in vivo effect of FTY720 on rat thymus and spleen. MATERIALS AND METHODS Inbred male Lewis (RT-I(l)) rats, 5-weeks-old, received FTY720 (0.1, 1, or 10 mg/kg) by intramuscular injection into 1 of 4 limbs daily for 7 days. The rats were humanely killed at 1, 3, 5, or 7 days after starting administration of FTY720. The thymus and spleen were obtained for hematoxylin and eosin (HE) as well as immunoperoxidase staining using the antibodies OX8 (CD8), W3/25 (CD4), and OX6 (major histocompatibility complex class II). RESULTS HE staining revealed marked atrophy in the cortical region of the thymus among rats administered FTY720 at the dose of 10 mg/kg. The atrophy extended to the whole cortex. On day 7 of administration of FTY 720 (10 mg/kg), the medulla of the thymus showed relative expansion due to cells accumulation. Also, the spleens of FTY720-treated rats revealed an obvious reduction in the T-cell-dependent areas around the central artery. In conclusion, the immunosuppressive effect of FTY720 may be due to an inhibitory effect on T-cell emigration from the thymus to the periphery.
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Affiliation(s)
- K Takai
- Department of Urology, Yamaguchi University School of Medicine, Ube, Yamaguchi, Japan.
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Suzuki Y, Inagaki F, Takai K, Nealson KH, Horikoshi K. Microbial diversity in inactive chimney structures from deep-sea hydrothermal systems. Microb Ecol 2004; 47:186-196. [PMID: 14749907 DOI: 10.1007/s00248-003-1014-y] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/13/2003] [Accepted: 04/28/2003] [Indexed: 05/24/2023]
Abstract
Massive chimney structures, which are characteristic of many hydrothermally active zones, harbor diverse microbial communities containing both thermophilic and hyperthermophilic microbes. However, vent chimneys ultimately become hydrothermally inactive, and the changes that occur in the microbial communities upon becoming inactive have not been documented. We thus collected inactive chimneys from two geologically and geographically distinct hydrothermal fields, Iheya North in the western Pacific Ocean and the Kairei field in the Indian Ocean. The chimneys displayed easily distinguishable strata, which were analyzed with regard to both mineralogical and microbiological properties. X-ray diffraction pattern and energy-dispersive spectroscopic analyses revealed that the main mineral components of the chimney substructures from Iheya North and the Kairei field were barite (BaSO4) and chalcopyrite (CuFeS2), respectively. Microbial cell densities in the substructures determined by DAPI counting ranged from 1.7 x 10(7) cells g(-1) to 3.0 x 10(8) cells g(-1). The proportions of archaeal rDNA in the whole microbial rDNA assemblages in all substructures were, at most, a few percent as determined by quantitative fluorogenic PCR. The microbial rDNA clone analysis and whole-cell fluorescence in situ hybridization revealed a community that was decidedly different from any communities previously reported in active chimneys. Curiously, both samples revealed the abundant presence of a group of Bacteria related to a magnetosome-bearing bacterium, " Magnetobacterium bavaricum" of the Nitrospirae division. These results suggest that inactive chimneys provide a distinct microbial habitat.
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Affiliation(s)
- Y Suzuki
- Subground Animalcule Retrieval Project, Frontier Research System for Extremophiles, Japan Marine Science and Technology Center, 237-0061, Yokosuka, Japan.
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Tamura Y, Yoshida M, Suzuki J, Hiratou T, Miyano-Kurosaki N, Takai K, Takaku H. Properties of quadruplex oligonucleotides with anti-HIV-1 activity. Nucleic Acids Symp Ser 2003:181-2. [PMID: 12903328 DOI: 10.1093/nass/44.1.181] [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] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
A phosphorothioate oligonucleotide composed of deoxyguanosine and thymidine was identified as an inhibitor of HIV-1 infection at an early stage of the HIV-1 replication cycle in vitro. The phosphodiester and phosphorothioate chimeric oligonucleotides were found to be potent inhibitors of several steps of HIV-1 infection: the interaction with CD4 and the chemokine receptor, the reverse transcriptase activity, and the integrase activity. To elucidate the mechanism of the anti-HIV-1 function of these oligonucleotides in terms of their structure, we focussed on their G-serial sequences and investigated the characteristics of their solution structures. These oligonucleotides were proved to be able to adopt G-quadruplex structures by UV and CD measurements. We presume that the anti-HIV-1 activities of these oligonucleotides are consequently attributable to G-quadruplex formation.
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Affiliation(s)
- Y Tamura
- High Technology Research Center, Chiba Institute of Technology, 2-17-1 Tsudanuma, Narashino, Chiba 275-0016, Japan
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Abstract
DNA enzymes are RNA-cleaving single stranded DNA molecules. The structure and the catalytic domain of a DNA enzyme were determined by Santro et al. in 1997. In this study, we have designed several types of DNA enzymes (PB2Dz) targeted to the PB2 mRNA translation initiation region of influenza A virus, and examined their cleavage kinetics, nuclease resistance, and a luciferase gene reporter assay. Using a synthetic substrate, these DNA enzymes were shown to have cleavage activity that is dependent on the length of the substrate recognition domain. To confer serum nuclease resistance to the DNA enzymes, we designed a new type of DNA enzyme that has the N3'-P5' phosphoramidate modification (PB2Dz-N) at each terminal. We examined the activity of this DNA enzyme in vivo. The DNA enzymes used in this study inhibited the expression of the PB2-luciferase gene in COS cells. These results suggest that DNA enzymes are potentially useful as gene inactivating agents of influenza A virus.
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Affiliation(s)
- H Takahashi
- Department of Industrial Chemistry, Chiba Institute of Technology, 2-17-1 Tsudanuma, Narashino, Chiba 275-0016, Japan
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Abstract
At the haemodialysis centres of nine hospitals in Japan, microbial contamination of treated water (reverse osmosis method), acid and bicarbonate concentrates, and dialysate was investigated. Among these fluids used in haemodialysis, the dialysate was most frequently contaminated and had the highest concentration of bacteria. Of 40 dialysate samples analysed, 42.5% showed a bacterial count of more than 2000cfu/mL, which was above the Association for the Advancement of Medical Instrumentation (AAMI) standard. However, among the 40 samples from 20 dialysis machines, all six dialysate samples from three dialysis machines that used an ultrafiltration membrane in the circuit before the entrance of the dialysate into the dialyser, showed a bacterial count of < or =10 cfu/mL. In addition, when an ultrafiltration membrane was used in the circuit before the entrance of the dialysate into the dialyser for four dialysis machines showing dialysate samples contaminated with 10(4)-10(5)cfu/mL the bacterial count in dialysate samples from these machines became zero. Because dialysis machines are susceptible to microbial contamination, it is necessary to take measures such as placing an ultrafiltration membrane into the circuit before the entrance of dialysate into the dialyser.
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Affiliation(s)
- S Oie
- Department of Pharmacy, Yamaguchi University Hospital, 1-1-1 Minamikogushi, Ube 755-8505, Japan
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Kagoshima Y, Yokoyama Y, Niimi T, Koyama T, Tsusaka Y, Matsui J, Takai K. Hard X-ray phase-contrast microscope for observing transparent specimens. ACTA ACUST UNITED AC 2003. [DOI: 10.1051/jp4:200300027] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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Tsuchida M, Takai K, Hamawy MM, Knechtle SJ, Naito K. Involvement of linker for activation of T cells in the costimulatory signaling pathways. Transplant Proc 2003; 35:553-4. [PMID: 12591528 DOI: 10.1016/s0041-1345(02)03969-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Affiliation(s)
- M Tsuchida
- Department of Urology, Yamaguchi University School of Medicine, Minami-Kogushi, Ube, Yamaguchi, Japan
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Kishi Y, Fujikawa K, Uchiyama K, Tsuchida M, Takai K, Suga A, Naito K. Laparoscopic fenestrationon on a posttransplant lymphocele: a case report. Transplant Proc 2003; 35:324-6. [PMID: 12591424 DOI: 10.1016/s0041-1345(02)03946-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
- Y Kishi
- Department of Urology, Yamaguchi University School of Medicine, Ube, Japan
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Takai K, Kishi Y, Fujikawa K, Uchiyama K, Tsuchida M, Naito K. Delayed graft function after renal transplantation from a non-heart-beating donors. Transplant Proc 2003; 35:89-91. [PMID: 12591320 DOI: 10.1016/s0041-1345(02)03987-8] [Citation(s) in RCA: 4] [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] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Affiliation(s)
- K Takai
- Department of Urology, Yamaguchi University School of Medicine, Ube, Yamaguchi, Japan
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Kawamura H, Matsumura M, Kishi Y, Fujikawa K, Uchiyama K, Tsuchida M, Konishi M, Takai K, Aoki A, Suga A, Naito K. Double filtration plasmapheresis in an ABO-incompatible renal transplantation: a case report. Transplant Proc 2003; 35:227-9. [PMID: 12591375 DOI: 10.1016/s0041-1345(02)03856-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Affiliation(s)
- H Kawamura
- Department of Urology, Yamaguchi University School of Medicine, Ube, Yamaguchi, Japan
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Suga A, Kishi Y, Fujikawa Y, Uchiyama K, Tsuchida M, Takai K, Naito K. Diabetes mellitus after renal transplantation under tacrolimus-based immunosuppression. Transplant Proc 2003; 35:263-5. [PMID: 12591391 DOI: 10.1016/s0041-1345(02)03807-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- A Suga
- Section of Urology, Yamaguchi Red-Cross Hospital, Yamaguchi, Japan
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Kimura S, Kashima M, Kawa Y, Nakamura F, Nawa Y, Takai K, Mizoguchi M. A case of subcutaneous sparganosis: therapeutic assessment by an indirect immunofluorescence antibody titration using sections of the worm body obtained from the patient. Br J Dermatol 2003; 148:369-71. [PMID: 12588402 DOI: 10.1046/j.1365-2133.2003.05097_6.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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42
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Kagoshima Y, Yokoyama Y, Niimi T, Tsusaka Y, Matsui J, Takai K, Aino M. High-resolution hard X-ray phase-contrast microscope for observing transparent biological specimens. Acta Crystallogr A 2002. [DOI: 10.1107/s0108767302087172] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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43
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Takai K, Nitta K, Utimoto K. Simple and selective method for aldehydes (RCHO) .fwdarw. (E)-haloalkenes (RCH:CHX) conversion by means of a haloform-chromous chloride system. J Am Chem Soc 2002. [DOI: 10.1021/ja00283a046] [Citation(s) in RCA: 632] [Impact Index Per Article: 28.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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44
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Takai K, Tagashira M, Kuroda T, Oshima K, Utimoto K, Nozaki H. Reactions of alkenylchromium reagents prepared from alkenyl trifluoromethanesulfonates (triflates) with chromium(II) chloride under nickel catalysis. J Am Chem Soc 2002; 108:6048-50. [DOI: 10.1021/ja00279a068] [Citation(s) in RCA: 381] [Impact Index Per Article: 17.3] [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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45
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Sugimoto H, Kaneko T, Ishiguchi T, Takai K, Ohta T, Yagi Y, Inoue S, Takeda S, Nakao A. Delayed rupture of a pseudoaneurysm following pancreatoduodenectomy: report of a case. Surg Today 2002; 31:932-5. [PMID: 11759894 DOI: 10.1007/s005950170039] [Citation(s) in RCA: 28] [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: 11/29/2022]
Abstract
We report herein the case of a 63-year-old man in whom delayed rupture of a pseudoaneurysm occurred 120 days following pancreatoduodenectomy. Color Doppler examination indicated a pseudoaneurysm originating from the ligated gastroduodenal artery. Transcatheter arterial embolization was done at the common hepatic artery, proximal and distal to the pseudoaneurysm, with microcoils. The patient had a minor elevation of liver enzymes, which subsequently returned to normal. Due to the absence of any postoperative complications such as pancreatic anastomotic leakage, we assumed that the pseudoaneurysm formation had been caused by a weakness in the arterial wall according to skeletonization resulting from lymphadenectomy and intraoperative radiation therapy. To our knowledge, this case represents the longest interval between pancreatoduodenectomy and rupture of a pseudoaneurysm ever to be reported in the literature.
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Affiliation(s)
- H Sugimoto
- Second Department of Surgery, Nagoya University School of Medicine, Japan
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Kawashima T, Takai K, Aso H, Manabe T, Takizawa K, Kachi-Terajima C, Ishii T, Miyasaka H, Matsuzaka H, Yamashita M, Okamoto H, Kitagawa H, Shiro M, Toriumi K. Syntheses and physical properties of quasi-one-dimensional halogen-bridged Cu(II)(-)Pt(IV) mixed-metal complexes [Cu(chxn)(2)][PtX(2)(chxn)(2)]X(4). Inorg Chem 2001; 40:6651-5. [PMID: 11735475 DOI: 10.1021/ic010341t] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Quasi-one-dimensional halogen-bridged Cu(II)-Pt(IV) mixed-metal complexes of the form [Cu(chxn)(2)][PtX(2)(chxn)(2)]X(4), where chxn = 1R,2R-diaminocyclohexane and X is either Cl or Br, have been synthesized. The crystal structures of these compounds have been determined by single-crystal X-ray diffraction. The Cl-bridged compound crystallizes in the space group I222 with dimensions a = 24.237(1) A, b = 5.103(1) A, c = 6.854(1) A, and V = 847.7(1) A(3) and with Z = 1. The Br-bridged complex crystallizes in the space group I222 with dimensions a = 23.700(8) A, b = 5.344(5) A, c = 6.978(8) A, and V = 883.8(8) A(3) and with Z = 1. These structures are isomorphic to each other and to homometal [Pt(chxn)(2)][PtX(2)(chxn)(2)]X(4) complexes. In these complexes, the planar [Cu(chxn)(2)] and the octahedral [PtX(2)(chxn)(2)] groups are stacked alternatively with the axial bridging halogen ions, forming linear chain structures. The neighboring [Cu(chxn)(2)] and [PtX(2)(chxn)(2)] moieties along the chains are linked by hydrogen bonds between amino hydrogens and the counteranions (X). Moreover, there are hydrogen bonds among the neighboring chains that form a two-dimensional hydrogen-bonded network parallel to the bc plane. Therefore, the Cu(II) and Pt(IV) units are two-dimensionally ordered. The b axes correspond to the Cu(II)-Pt(IV) separations, which are shorter than those of [Pt(chxn)(2)][PtX(2)(chxn)(2)]X(4) due to the smaller ionic radius of the Cu(II) ions. In the XP spectra, the Pt(IV) 4f(7/2) and Pt(IV) 4f(5/2) binding energies in homometal [Pt(chxn)(2)][PtX(2)(chxn)(2)]X(4) are lower than those of [Cu(chxn)(2)][PtX(2)(chxn)(2)]X(4) (X = Cl and Br), indicating that the electron-phonon interaction in Cu(II)-Pt(IV) compounds is stronger than that in Pt(II)-Pt(IV) compounds. In the Raman spectra, nu(Pt(IV)(-)X) of the homometal Pt(II)-Pt(IV) complexes is lower than that of the Cu(II)-Pt(IV) complexes, indicating again that the electron-phonon interaction in Cu(II)-Pt(IV) compounds is stronger than that of Pt(II)-Pt(IV) compounds. The temperature-dependent magnetic susceptibilities of the Cu(II)-Pt(IV) complexes show weak antiferromagnetic interactions between Cu(II) components along the chain axes.
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Affiliation(s)
- T Kawashima
- Graduate School of Human Informatics, Nagoya University, Chikusa-ku, Nagoya 464-8601, Japan
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Affiliation(s)
- K Takai
- Department of Neurosurgery, University of Tokyo School of Medicine, Japan.
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48
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Abstract
A culture-independent molecular analysis of archaeal communities in waters collected from deep South African gold mines was performed by performing a PCR-mediated terminal restriction fragment length polymorphism (T-RFLP) analysis of rRNA genes (rDNA) in conjunction with a sequencing analysis of archaeal rDNA clone libraries. The water samples used represented various environments, including deep fissure water, mine service water, and water from an overlying dolomite aquifer. T-RFLP analysis revealed that the ribotype distribution of archaea varied with the source of water. The archaeal communities in the deep gold mine environments exhibited great phylogenetic diversity; the majority of the members were most closely related to uncultivated species. Some archaeal rDNA clones obtained from mine service water and dolomite aquifer water samples were most closely related to environmental rDNA clones from surface soil (soil clones) and marine environments (marine group I [MGI]). Other clones exhibited intermediate phylogenetic affiliation between soil clones and MGI in the Crenarchaeota. Fissure water samples, derived from active or dormant geothermal environments, yielded archaeal sequences that exhibited novel phylogeny, including a novel lineage of Euryarchaeota. These results suggest that deep South African gold mines harbor novel archaeal communities distinct from those observed in other environments. Based on the phylogenetic analysis of archaeal strains and rDNA clones, including the newly discovered archaeal rDNA clones, the evolutionary relationship and the phylogenetic organization of the domain Archaea are reevaluated.
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Affiliation(s)
- K Takai
- Pacific Northwest National Laboratory, Richland, Washington 99352, USA
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Inagaki F, Takai K, Komatsu T, Kanamatsu T, Fujioka K, Horikoshi K. Archaeology of Archaea: geomicrobiological record of Pleistocene thermal events concealed in a deep-sea subseafloor environment. Extremophiles 2001; 5:385-92. [PMID: 11778839 DOI: 10.1007/s007920100211] [Citation(s) in RCA: 67] [Impact Index Per Article: 2.9] [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: 10/27/2022]
Abstract
A record of the history of the Earth is hidden in the Earth's crust, like the annual rings of an old tree. From very limited records retrieved from deep underground, one can infer the geographical, geological, and biological events that occurred throughout Earth's history. Here we report the discovery of vertically shifted community structures of Archaea in a typical oceanic subseafloor core sample (1410 cm long) recovered from the West Philippine Basin at a depth of 5719 m. Beneath a surface community of ubiquitous deep-sea archaea (marine crenarchaeotic group I; MGI), an unusual archaeal community consisting of extremophilic archaea, such as extreme halophiles and hyperthermophiles, was present. These organisms could not be cultivated, and may be microbial relicts more than 2 million years old. Our discovery of archaeal rDNA in this core sample, probably associated with the past terrestrial volcanic and submarine hydrothermal activities surrounding the West Philippine Basin, serves as potential geomicrobiological evidence reflecting novel records of geologic thermal events in the Pleistocene period concealed in the deep-sea subseafloor.
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Affiliation(s)
- F Inagaki
- Subground Animalcule Retrieval (SUGAR) Project, Frontier Research System for Extremophiles, Japan Marine Science and Technology Center (JAMSTEC), Yokosuka.
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Shiraishi K, Tsuchida M, Wada T, Yoshihiro S, Takai K, Suga A, Kaneda Y, Naito K. 22-Oxacalcitriol upregulates p21(WAF1/Cip1) in human parathyroid glands. A preliminary report. Am J Nephrol 2001; 21:507-11. [PMID: 11799271 DOI: 10.1159/000046658] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
In the era of 22-oxacalcitriol (OCT), newly synthesized 1 alpha,25-dihydroxyvitamin D(3) analogue, against secondary hyperparathyroidism, the indications of parathyroidectomy (PTx) has been restricted. Recent investigations on animal models have revealed the inhibitory effects on PTH secretion after OCT treatment, whereas there has been no evidence about human parathyroid glands. A 38-year-old man with a 19-year history of hemodialysis was performed PTx after the failure of OCT treatment. Expressions of proliferative nuclear cell antigen (PCNA), calcium-sensing receptor (CaSR), vitamin D receptor (VDR), p53 and p21(WAF1/Cip1) were analyzed by Western blotting and immunohistochemistry on resected parathyroid glands. We confirmed up-regulations of CaSR and VDR, which contribute the reduction of serum PTH, by OCT treatment. Concomitant up-regulation of p21(WAF1/Cip1) but not p53, especially in nodular hyperplasia, can be considered to induce cell cycle arrest of the parathyroid cells, but not cytocidal effect of OCT.
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Affiliation(s)
- K Shiraishi
- Department of Urology, Yamaguchi University School of Medicine, Ube, Yamaguchi, Japan.
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