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Wang M, Hosoda T, Jiang J, Shterengas L, Kipshidze G, Stein A, Feng T, Belenky G. External cavity type-I quantum well cascade diode lasers with a tuning range of 440 nm near 3 μm. Opt Lett 2018; 43:4473-4476. [PMID: 30211893 DOI: 10.1364/ol.43.004473] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2018] [Accepted: 08/17/2018] [Indexed: 06/08/2023]
Abstract
A three-stage cascade GaSb-based diode laser heterostructure with an enhanced optical gain spectral bandwidth was designed and fabricated. The gain broadening was achieved by varying the thickness of the type-I quantum wells in different stages of the cascade active region from 10 to 14 nm. The structures were processed into bent ridge gain chips with virtually eliminated feedback from the anti-reflection-coated angled facet. The external cavity devices based on a novel gain chip design demonstrated a record wide tuning range from 2.79 to 3.23 μm in a Littrow cavity configuration at 20°C.
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Feng T, Hosoda T, Shterengas L, Kipshidze G, Stein A, Lu M, Belenky G. Laterally coupled distributed feedback type-I quantum well cascade diode lasers emitting near 3.22 μm. Appl Opt 2017; 56:H74-H80. [PMID: 29091669 DOI: 10.1364/ao.56.000h74] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/2017] [Accepted: 09/19/2017] [Indexed: 06/07/2023]
Abstract
The laterally coupled distributed feedback (LC-DFB) GaSb-based type-I quantum well cascade diode lasers using the second- and the sixth-order gratings to stabilize the output spectrum near 3.22 μm were designed and fabricated. The laser heterostructure contained three cascades. The devices were manufactured using a single dry etching step defining the ∼5-μm-wide ridge with ∼5-μm-wide gratings sections adjacent to the ridge sides. The grating coupling coefficients were estimated to be about 1 cm-1. The stability of the single-frequency operation was ensured by alignment of the DFB mode to the relatively wide gain peak. The 2-mm-long second-order LC-DFB lasers generated above 10 mW of continuous-wave (CW) output power at 20°C in epi-side-up configuration and demonstrated power conversion efficiency above 2%. The sixth-order LC-DFB lasers showed lower efficiency but still generated several milliwatts of CW output power. The devices demonstrated a CW current tuning range of about 3.5 nm at the temperature of 20°C.
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Páll-Gergely B, Otani JU, Hosoda T, Asami T, Harl J. A new species of Camaenidae (Gastropoda, Pulmonata) from Nusa Penida and Lombok Islands, Indonesia: novelty in a well-known fauna. Molluscan Research 2017. [DOI: 10.1080/13235818.2017.1344903] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
| | | | | | - Takahiro Asami
- Department of Biology, Shinshu University, Matsumoto, Japan
| | - Josef Harl
- Department of Biology, Shinshu University, Matsumoto, Japan
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Sawada H, Fujioka S, Hosoda T, Zhang Z, Arikawa Y, Nagatomo H, Nishimura H, Sunahara A, Theobald W, Patel PK, Beg FN. Development of 4.5 keV monochromatic X-ray radiography using the high-energy, picosecond LFEX laser. ACTA ACUST UNITED AC 2016. [DOI: 10.1088/1742-6596/717/1/012112] [Citation(s) in RCA: 4] [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: 11/12/2022]
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Liang R, Shterengas L, Kipshidze G, Hosoda T, Suchalkin S, Belenky G. Novel Cascade Diode Lasers Based on Type-I Quantum Wells. Frontiers in Electronics 2015. [DOI: 10.1142/9789814656917_0009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Affiliation(s)
- Rui Liang
- Department of Electrical and Computer Engineering, Stony Brook University, Stony Brook, NY 11794, USA
| | - Leon Shterengas
- Department of Electrical and Computer Engineering, Stony Brook University, Stony Brook, NY 11794, USA
| | - Gela Kipshidze
- Department of Electrical and Computer Engineering, Stony Brook University, Stony Brook, NY 11794, USA
| | - Takashi Hosoda
- Department of Electrical and Computer Engineering, Stony Brook University, Stony Brook, NY 11794, USA
| | - Sergey Suchalkin
- Department of Electrical and Computer Engineering, Stony Brook University, Stony Brook, NY 11794, USA
| | - Gregory Belenky
- Department of Electrical and Computer Engineering, Stony Brook University, Stony Brook, NY 11794, USA
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Yoneda M, Kagoo T, Hashimoto T, Shiraishi J, Ohashi K, Hosoda T, Yokoyama A, Boku S, Ueno H, Yano T. Granulocyte Colony-Stimulating Factor (G-CSF) -Producing Metastatic Bone Tumors of the Unknown Primary Site. Ann Oncol 2013. [DOI: 10.1093/annonc/mdt460.87] [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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Hoshino M, Sugito K, Kawashima H, Goto S, Kaneda H, Furuya T, Hosoda T, Masuko T, Ohashi K, Inoue M, Ikeda T, Tomita R, Koshinaga T. Prediction of contralateral inguinal hernias in children: a prospective study of 357 unilateral inguinal hernias. Hernia 2013; 18:333-7. [PMID: 23644774 PMCID: PMC4037557 DOI: 10.1007/s10029-013-1099-2] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2012] [Accepted: 04/26/2013] [Indexed: 11/26/2022]
Abstract
Purpose Previously, we established a pre-operative risk scoring system to predict contralateral inguinal hernia in children with unilateral inguinal hernias. The current study aimed to verify the usefulness of our pre-operative scoring system. Methods This was a prospective study of patients undergoing unilateral inguinal hernia repair from 2006 to 2009 at a single institution. Gender, age at initial operation, birth weight, initial operation side, and the pre-operative risk score were recorded. We analyzed the incidence of contralateral inguinal hernia, risk factors, and the usefulness of our pre-operative risk scoring system. The follow-up period was 36 months. We used forward multiple logistic regression analysis to predict contralateral hernia. Results Of the 372 patients who underwent unilateral hernia repair, 357 (96.0 %) were completely followed-up for 36 months, and 23 patients (6.4 %) developed a contralateral hernia. Left-sided hernia (OR = 5.5, 95 %, CI = 1.3–24.3, p = 0.023) was associated with an increased risk of contralateral hernia. The following covariates were not associated with contralateral hernia development: gender (p = 0.702), age (p = 0.215), and birth weight (p = 0.301). The pre-operative risk score (cut-off point = 4.5) of the patients with a contralateral hernia was significantly higher, compared with the patients without a contralateral hernia using the area under the receiver operating characteristic curve (p = 0.024). Conclusions Using multivariate analysis, we confirmed usefulness of our pre-operative scoring system and initial side of the inguinal hernia, together, for the prediction of contralateral inguinal hernia in children.
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Affiliation(s)
- M. Hoshino
- Department of Pediatric Surgery, Nihon University School of Medicine, 30-1, Ohyaguchikami-cho, Itabashi-ku, Tokyo 173-8610 Japan
| | - K. Sugito
- Department of Pediatric Surgery, Nihon University School of Medicine, 30-1, Ohyaguchikami-cho, Itabashi-ku, Tokyo 173-8610 Japan
| | - H. Kawashima
- Department of Pediatric Surgery, Nihon University School of Medicine, 30-1, Ohyaguchikami-cho, Itabashi-ku, Tokyo 173-8610 Japan
| | - S. Goto
- Department of Pediatric Surgery, Nihon University School of Medicine, 30-1, Ohyaguchikami-cho, Itabashi-ku, Tokyo 173-8610 Japan
| | - H. Kaneda
- Department of Pediatric Surgery, Nihon University School of Medicine, 30-1, Ohyaguchikami-cho, Itabashi-ku, Tokyo 173-8610 Japan
| | - T. Furuya
- Department of Pediatric Surgery, Nihon University School of Medicine, 30-1, Ohyaguchikami-cho, Itabashi-ku, Tokyo 173-8610 Japan
| | - T. Hosoda
- Department of Pediatric Surgery, Nihon University School of Medicine, 30-1, Ohyaguchikami-cho, Itabashi-ku, Tokyo 173-8610 Japan
| | - T. Masuko
- Department of Pediatric Surgery, Nihon University School of Medicine, 30-1, Ohyaguchikami-cho, Itabashi-ku, Tokyo 173-8610 Japan
| | - K. Ohashi
- Department of Pediatric Surgery, Nihon University School of Medicine, 30-1, Ohyaguchikami-cho, Itabashi-ku, Tokyo 173-8610 Japan
| | - M. Inoue
- Department of Pediatric Surgery, Nihon University School of Medicine, 30-1, Ohyaguchikami-cho, Itabashi-ku, Tokyo 173-8610 Japan
| | - T. Ikeda
- Department of Pediatric Surgery, Nihon University School of Medicine, 30-1, Ohyaguchikami-cho, Itabashi-ku, Tokyo 173-8610 Japan
| | - R. Tomita
- Department of Pediatric Surgery, Nihon University School of Medicine, 30-1, Ohyaguchikami-cho, Itabashi-ku, Tokyo 173-8610 Japan
| | - T. Koshinaga
- Department of Pediatric Surgery, Nihon University School of Medicine, 30-1, Ohyaguchikami-cho, Itabashi-ku, Tokyo 173-8610 Japan
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Kagoo T, Ohashi K, Hosoda T, Soma S, Yokoyama A, Boku S, Ueno H, Yano T. Spinal Cord Compression: An Unusual Complication of Follicular Lymphoma. Ann Oncol 2012. [DOI: 10.1016/s0923-7534(20)32483-2] [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] Open
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Semyonov OG, Subashiev AV, Shabalov A, Lifshitz N, Chen Z, Hosoda T, Luryi S. Reflectance reduction of InP wafers after high-temperature annealing. Appl Opt 2012; 51:5425-5431. [PMID: 22859031 DOI: 10.1364/ao.51.005425] [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] [Subscribe] [Scholar Register] [Received: 03/15/2012] [Accepted: 05/30/2012] [Indexed: 06/01/2023]
Abstract
Broadband reduction of light reflection from the surface of InP wafers after high-temperature annealing in air has been observed. In the transparency region of the material, the reflection drop is accompanied by increasing transmission of light through the wafer. The spectral position of a deep minimum of the reflection coefficient can be tuned, by varying the temperature and the time of annealing, in a wide spectral range from ultraviolet to infrared. The effect is due to formation of thermal oxide layers on the surfaces of the wafer with optical parameters favorable for antireflection.
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Affiliation(s)
- Oleg G Semyonov
- State University of New York at Stony Brook, Department of Electrical and Computer Engineering, Stony Brook, New York 11794, USA.
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Abstract
This review article addresses the controversy as to whether the adult heart possesses an intrinsic growth reserve. If myocyte renewal takes place in healthy and diseased organs, the reconstitution of the damaged tissue lost upon pathological insults might be achieved by enhancing a natural occurring process. Evidence in support of the old and new view of cardiac biology is critically discussed in an attempt to understand whether the heart is a static or dynamic organ. According to the traditional concept, the heart exerts its function until death of the organism with the same or lesser number of cells that are present at birth. This paradigm was challenged by documentation of the cell cycle activation and nuclear and cellular division in a subset of myocytes. These observations raised the important question of the origin of replicating myocytes. Several theories have been proposed and are presented in this review article. Newly formed myocytes may derive from a pre-existing pool of cells that has maintained the ability to divide. Alternatively, myocytes may be generated by activation and commitment of resident cardiac stem cells or by migration of progenitor cells from distant organs. In all cases, parenchymal cell turnover throughout lifespan results in a heterogeneous population consisting of young, adult, and senescent myocytes. With time, accumulation of old myocytes has detrimental effects on cardiac performance and may cause the development of an aging myopathy.
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Affiliation(s)
- T Hosoda
- Division of Cardiovascular Medicine, Department of Anesthesia and Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115, USA.
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Hosoda T, Sato J, Lin LK, Chen YJ, Harada M, Suzuki H. Phylogenetic history of mustelid fauna in Taiwan inferred from mitochondrial genetic loci. CAN J ZOOL 2011. [DOI: 10.1139/z11-029] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Phylogenetic relationships among species of the family Mustelidae were examined using the combined nucleotide sequences of the three mitochondrial genetic loci (cytochrome b (MT-CYB; 1140 bp), NADH dehydrogenase subunit 2 (MT-ND2; 1044 bp), and displacement loop (MT-DLOOP; 540 bp)), with special emphasis on the phylogenetic history of four Taiwanese mustelid species: Martes flavigula (Boddaert, 1785), Melogale moschata (Gray, 1831), Mustela nivalis L., 1766, and Mustela sibirica Pallas, 1773. Maximum likelihood phylogenetic analysis of the combined sequences of the mitochondrial genetic loci produced a topology largely congruent with that of previous studies at the species level. Analyses of intraspecific genetic variations revealed two Melogale moschata individuals from Taiwan and Vietnam that showed genetic distances comparable with interspecific variations within the mustelid lineages. Furthermore, Mustela nivalis, recently discovered in Taiwan, was not as genetically differentiated from other continental conspecific individuals as a previous morphological survey suggested. Divergence time estimations for the mustelid lineages of Taiwan and the Eurasian continent by the Bayesian relaxed molecular clock approach suggested multiple colonization of Taiwan by mustelids from the continent during the Pleistocene, creating a hierarchical pattern of endemism based on the differential isolation history of the mustelid species in Taiwan.
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Affiliation(s)
- T. Hosoda
- Taikyu High School, 1985 Yuasa-cho, Arida-gun, Wakayama 643-0004, Japan
| | - J.J. Sato
- Laboratory of Animal Cell Technology, Faculty of Life Science and Technology, Fukuyama University, Higashimura-cho, Aza, Sanzo, 985, Fukuyama 729-0292, Japan
| | - L.-K. Lin
- Laboratory of Wildlife Ecology, Department of Biology, Tunghai University, R.O.C, Taichung 407, Taiwan
| | - Y.-J. Chen
- Department of Zoology, National Museum of Natural Science, 1, Kuan Chien RD, Taichung 404, Taiwan
| | - M. Harada
- Laboratory Animal Center, Graduate School of Medicine, Osaka City University, Osaka 545-8585, Japan
| | - H. Suzuki
- Laboratory of Ecology and Genetics, Graduate School of Environmental Earth Science, Hokkaido University, Kita-ku, Sapporo 060-0810, Japan
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Kitano M, Matsuoka M, Hosoda T, Ueshima M, Anpo M. Effect of HF treatment on the activity of TiO2 thin films for photocatalytic water splitting. Res Chem Intermed 2008. [DOI: 10.1163/156856708784795518] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Takashima Y, Nakayama Y, Hashiguchi M, Hosoda T, Yasuda H, Hirao T, Harada A. Syntheses of group 4 transition metal complexes bearing 2-pyridinethiolate ligands and their catalytic activities for ethylene polymerization. POLYMER 2006. [DOI: 10.1016/j.polymer.2006.06.033] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Wakabayashi A, Utsuyama M, Hosoda T, Sato K, Takahashi H, Hirokawa K. Induction of immunological tolerance by oral, but not intravenous and intraportal, administration of ovalbumin and the difference between young and old mice. J Nutr Health Aging 2006; 10:183-91. [PMID: 16622581] [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: 05/08/2023]
Abstract
BACKGROUND Induction of immunological tolerance is dependent on the route of antigenic administration, the dose of an antigen and the age of animals. OBJECTIVES We investigated the effect of age on the tolerance induction in mice by administration of antigen through different routes and at different doses. DESIGN Young and old BDF1 mice were orally, intraportally or intravenously administrated with a low or a high dose of ovalbumin (OVA). Then, delayed-type hypersensitivity (DTH) responses and serum anti-OVA antibody levels were assessed after systemic immunization of OVA with alum after appropriate intervals. RESULTS In the young mice, oral administration of OVA suppressed DTH response and anti-OVA IgG1, IgG2b, IgM and IgE level in a dose-dependent manner. In the old mice, however, the suppression of IgG1 and IgE levels was induced by oral administration of a low dose of OVA, but no suppression by a high dose. On the other hand, intraportal or intravenous injection of OVA did not suppress DTH response and enhanced anti-OVA antibody levels in a dose-dependent manner in both young and old mice. Production of anti-OVA IgG2a antibody after systemic injection of OVA was detected in the mice, which had been treated with intraportal or intravenous injection of OVA, but not detected in the mice, which had been treated with oral administration of OVA. On the contrary, suppression of anti-OVA IgE antibody was observed only in the mice, which had been treated with oral administration of OVA. CONCLUSION The oral administration of OVA, neither intravenous nor intraportal, induced immunological tolerance to OVA. An adequate dose of OVA for the tolerance induction and the suppression of antibody production are different between young and old mice. The suppression of IgE antibody was observed only by oral administration of OVA, much obviously in young mice than in the old. The results also indicated that the antigen processing in the liver did not play a major role in the induction of oral tolerance to OVA.
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Affiliation(s)
- A Wakabayashi
- Department of Microbiology and Immunology, Nippon Medical School, 1-1-5 Sendagi, Bunkyo-ku, Tokyo 113-8602, Japan.
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Hosoda T, Sato JJ, Shimada T, Campbell KL, Suzuki H. Independent nonframeshift deletions in the MC1R gene are not associated with melanistic coat coloration in three mustelid lineages. ACTA ACUST UNITED AC 2005; 96:607-13. [PMID: 16135707 DOI: 10.1093/jhered/esi096] [Citation(s) in RCA: 25] [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: 11/12/2022]
Abstract
Sequence variation within the 5' flanking (about 240 bp) and exon regions (426 bp) of the melanocortin-1 receptor (MC1R) gene was examined to determine the potential role of this protein in the melanistic coat coloration of 17 mustelid species in four genera: Gulo (wolverines), Martes (martens), Mustela (weasels), and Meles (badgers). Members of the genera Mustela and Meles, together with Martes flavigula and Martes pennanti, were shown to have intact gene sequences. However, several "in frame" deletions of the MC1R gene region implicated in melanism of other species were detected within members of the genera Martes and Gulo. For instance, Gulo gulo possessed a 15 bp deletion in the second transmembrane domain coding region, while Martes americana, Martes melampus, Martes zibellina, and Martes martes shared a 45 bp deletion overlapping this area. In addition, Martes foina was found to possess a 10 bp insertion followed closely by a 28 bp deletion immediately downstream of the deletion found in other martens. Notably, none of these indels was associated with a melanistic phenotype. Phylogenetic analysis revealed that each of these nonrandomly distributed deletions arose independently during the evolution of this family. Specific indel-neighboring motifs appear to largely account for the biased and repeated occurrence of deletion events in the Martes/Gulo clade.
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Affiliation(s)
- T Hosoda
- Taikyu High School, 1985 Yuasa-cho, Arida-gun, Wakayama 643-0004, Japan
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Abstract
Leptin can regulate several immune functions. However, the role of leptin on lymphocyte function has not been recognized in vivo. Accordingly, we have investigated the effect of leptin on starvation-induced immune dysfunction using diet-induced obese mice. To induce obesity, C57BL/6J mice were fed a high-fat diet for 14 weeks and control mice were fed a standard diet for the same period. The obese and control groups of mice were then starved for 48 h, and received intraperitoneal injections of recombinant leptin or phosphate-buffered saline four times during starvation. Other control mice in both diet groups were free fed without being starved. Although starvation of the control mice dramatically reduced the weights of the immune organs, cytokine production and increased proliferation of cultured splenocytes, these levels returned to those of the free-feeding groups with exogenous leptin administration. However, these effects of leptin were not observed in obese mice. These findings provide some evidence that leptin can regulate the immune function in vivo. It is also suggested that the action of leptin might not appear in obesity.
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Affiliation(s)
- N Mito
- Japan Women's University, Division of Clinical Nutrition, 2-8-1, Mejirodai, Bunkyo-ku, Tokyo 112-8681, Japan
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Mito N, Hiyoshi T, Hosoda T, Kitada C, Sato K. Effect of obesity and insulin on immunity in non-insulin-dependent diabetes mellitus. Eur J Clin Nutr 2002; 56:347-51. [PMID: 11965511 DOI: 10.1038/sj.ejcn.1601324] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2001] [Revised: 08/27/2001] [Accepted: 09/06/2001] [Indexed: 11/09/2022]
Abstract
OBJECTIVE To understand the effect of obesity and insulin on immune functions in non-insulin-dependent diabetes mellitus (NIDDM). SUBJECT Fourteen obese NIDDM (body mass index (BMI)=30.6+/-1.1), seven non-obese NIDDM (BMI=24.2+/-0.5) and five obese non-NIDDM (BMI=28.3+/-0.67). INTERVENTIONS We first examined the influence of insulin on the proliferation of several human cell lines. Second, we compared several immune functions between obese and non-obese NIDDM, and obese non-NIDDM patients using peripheral blood mononuclear cells. RESULT Insulin decreased proliferation of T-cell lines but not that of other types of cell lines. Furthermore, obesity augmented the production of IL-1beta which could have cytotoxity against islet beta cells in NIDDM. CONCLUSION Our data suggested that the pathophysiology of NIDDM could be affected by the change of immunity due to obesity, and the treatment of obesity in NIDDM may be important from an immunological aspect.
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Affiliation(s)
- N Mito
- Japan Women's University, The Division of Clinical Nutrition, Tokyo, Japan.
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Kurosawa Y, Kato T, Hosoda T, Morita H, Ohshiro H, Nose T. [Study on the effects of walking on functional fitness in aged patients with the hand-arm vibration syndrome]. Nihon Koshu Eisei Zasshi 2001; 48:897-902. [PMID: 11774703] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
Abstract
PURPOSE This article reports the effectiveness of mild walking exercise for maintaining functional fitness in aged patients with the hand-arm vibration syndrome (HAVS). SUBJECTS AND METHODS Fifty-two patients suffering from vibration syndrome, for which they received annual compulsory examination from December 1998 to March 1999 at the San-in Rosai Hospital, were examined. They all were male, with a mean age (standard deviation) of 69.1 (7.3) years, and were randomly allocated to an intervention group (N = 26) and a control group (N = 26). The goal of the intervention was to achieve and maintain at least 30 minutes of walking a day. Functional fitness was assessed by a sitting and standing test, a zigzag walking test, a hand working test with a pegboard for dexterity, and a self-care working test proposed by the Physical Fitness Research Institute, Meiji Life Foundation of Health and Welfare. RESULTS There were no significant differences between the two groups regarding baseline characteristics. The proportions of subjects with regular exercise habits after the intervention were 84.6% (22/26) and 53.8% (14/26) in the intervention and control groups, respectively, the difference being significant. The total scores for functional fitness were improved in the intervention, while decline was noted in the control group. Sitting and standing and self-care working ability were also improved in the intervention group as against the deterioration with age in the control group. CONCLUSIONS Our findings show to some extent that intervention using mild exercise, walking for 30 min, is effective for aged patients with HAVS to maintain and improve functional fitness.
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Affiliation(s)
- Y Kurosawa
- Department of Public Health, Faculty of Medicine, Tottori University
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Hosoda T, Monzen K, Hiroi Y, Oka T, Takimoto E, Yazaki Y, Nagai R, Komuro I. A novel myocyte-specific gene Midori promotes the differentiation of P19CL6 cells into cardiomyocytes. J Biol Chem 2001; 276:35978-89. [PMID: 11418590 DOI: 10.1074/jbc.m100485200] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Although several cardiac-specific transcription factors have been shown to play vital roles in various steps during the heart formation, the precise mechanism of the early stage of cardiogenesis has yet to be elucidated. By differential display technique, we tried to identify molecules that are expressed earlier than cardiac transcription factors such as CSX/NKX2-5 and GATA-4 and are involved in cardiomyocyte differentiation using the P19CL6 cell line, which efficiently differentiates into cardiomyocytes when treated with dimethyl sulfoxide. We isolated a novel gene designated Midori. Its deduced amino acid sequence contained an ATP/GTP-binding site, Ig-like domain, and Kringle-like domain. Northern blot analysis revealed that expression of Midori was restricted to the fetal and adult heart and adult skeletal muscle in mice. In whole mount in situ hybridization, Midori was expressed in cardiac crescent and developing heart but not in somites. The MIDORI protein was localized in the nucleus and overexpression of Midori induced expression of endogenous Midori itself, suggesting that MIDORI may act as a transcriptional regulator. Permanent P19CL6 cell lines overexpressing Midori more efficiently differentiated into cardiomyocytes than did parental cells, whereas those overexpressing the antisense Midori less efficiently differentiated. These results suggest that Midori may promote the differentiation of P19CL6 into cardiomyocytes.
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Affiliation(s)
- T Hosoda
- Department of Cardiovascular Medicine, University of Tokyo Graduate School of Medicine, Tokyo 113-8655, Japan
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Abstract
Accumulating studies have shown that estrogen replacement therapy reduces the risk of Alzheimer's disease. In this study, we clarified that 17beta-estradiol (E2) significantly rescues PC12 neuronal cells from amyloid beta protein (Abeta)-induced cell death. We found that the amino acid residues of 25 to 35 (Abeta25-35) were more cytotoxic than the full length protein (Abeta1-40) and these residues induced DNA fragmentation typical for apopto- sis. In addition, E2 was confirmed to inhibit calcium influx and cytochrome c release induced by Abeta25-35. Since these sequential events cause apoptosis, the protective effect of E2 may be exerted not by the direct interaction with Abeta, but by the blockade of the mitochondrial apoptotic pathway induced by Abeta.
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Affiliation(s)
- T Hosoda
- Department of Obstetrics and Gynecology, Kyoto Prefectural University of Medicine, Kawaramachi-Hirokoji, Kamikyo-ku, Kyoto, 602-8566, Japan
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21
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Takahashi K, Mito N, Hosoda T, Kato C, Sato K. No beneficial effect of vitamin E on selective immunological responses in early stage of collagen-induced murine arthritis. Nutr Res 2001. [DOI: 10.1016/s0271-5317(01)00292-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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22
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Honjo H, Kikuchi N, Hosoda T, Kariya K, Kinoshita Y, Iwasa K, Ohkubo T, Tanaka K, Tamura T, Urabe M, Kawata M. Alzheimer's disease and estrogen. J Steroid Biochem Mol Biol 2001; 76:227-30. [PMID: 11384881 DOI: 10.1016/s0960-0760(00)00152-7] [Citation(s) in RCA: 14] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The preventive effect of estrogen on Alzheimer's disease (AD) has become clear with epidemiological data. Therapeutic effects of estrogen have not yet been established. In this presentation, we report our new basic and clinical data. The estrogen receptor, (ER)alpha, and ERbeta mRNA were investigated in rat brain. Estradiol-17beta (E(2)) treatment following OVX reduced the levels of ERalpha mRNA in the hypothalamus. In the substantia innominata (SI), the number of choline acetyltransferase immunoreacive cells increased significantly in the estrogen treatment rat. The neurons in SI projecting to the forebrain cortex contained ERalpha. Increasing amounts of intracellular calcium, peroxidation, and apoptosis with amyloid beta were suppressed in neuronal cells from rat pheochromocytoma (PC12) cells with E(2). ERalpha cDNA transfected PC 12 cells elaborated more neurite-like processes with E(2). In clinics, we are currently preparing vaginal progesterone tablets, which essentially may concentrate in the endometrium to prevent endometrial cancer, with few general circulation of progesterone inviting less depression. The therapeutic effects of cyclic estrogen, such as its preventive effect, are suggested in these studies, at least on mild AD.
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Affiliation(s)
- H Honjo
- Department of Gynecology, Kyoto Prefectural University of Medicine, Kawaramachi, Hirokoji, Kamikyo-ku 602-8566, Kyoto, Japan
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23
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Abstract
Although decreased T-cell function has been observed in obese human subjects and genetically obese animals, the precise role of immune functions in obesity is still unclear. To investigate immune functions in obesity, we examined the proliferative responses of splenic lymphocytes and their capacity to produce cytokines in the presence or absence of leptin, the protein produced by the obese gene, in diet-induced obese and control mice. For induction of obesity, C57BL/6J mice were fed a high-fat diet for 13 weeks. In mice fed the high-fat diet, body weight, fat pad weight, and tumor necrosis factor (TNF) alpha production by adipocytes were significantly increased relative to mice fed the normal diet. Lipopolysaccharide (LPS) stimulated proliferation of cultured splenocytes from diet-induced obese mice was also increased. However, production of interleukin (IL)-2 by splenic lymphocytes from obese mice was suppressed, whereas interferon (IFN)-gamma and IL-4 production was increased. Exogenous lepitn regulated the cytokine production by cultured splenocytes from control and obese mice, respectively (upregulation of IFN-gamma and downregulation of IL-2 in control mice, and downregulation of IL-4 in obese mice). These results suggest that changes in cytokine production by splenic lymphocytes in obesity are indicative of altered immune functions that might contribute to related complications, although the effect of difference in nutrient intake (macro and micro) may also have contributed to the changes.
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Affiliation(s)
- N Mito
- Department of Food and Nutrition, Japan Women's University, Tokyo
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24
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Hosoda T, Suzuki H, Harada M, Tsuchiya K, Han SH, Zhang Y, Kryukov AP, Lin LK. Evolutionary trends of the mitochondrial lineage differentiation in species of genera Martes and Mustela. Genes Genet Syst 2000; 75:259-67. [PMID: 11245219 DOI: 10.1266/ggs.75.259] [Citation(s) in RCA: 63] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
We compared partial sequences (402 bp) of the mitochondrial cytochrome b gene in 68 individuals of martens (Martes), weasels (Mustela) and their relatives from the Northern Hemisphere to identify the modes of geographic differentiation in each species. We then compared complete sequences (1140 bp) of the gene in 17 species of the family Mustelidae to know the spatial and temporal modes of speciation, constructing linearized trees with transversional substitutions for deeper lineage divergences and with transversions and transitions for younger lineages. Our data suggested that these lineages of Martes and Mustela differentiated in a stepwise fashion with five radiation stages from the generic divergences (stage I) to the intraspecific divergences (stage V), during the last 10 or 20 million years as the fossil evidence suggests. In the lineage of Martes, the first offshoots are of Martes flavigula, M. pennanti, and Gulo gulo (stage II), the second is M. foina (stage III), and the third are M. americana, M. martes, M. melampus, and M. zibellina (stage IV). The divergence of the lineages of Mustela is likely to have taken place concurrently with the radiations of the Martes. These divergence processes are attributable in part to the geographic allocation along the two continents, North America and Eurasia, as well as among peripheral insular domains, such as Taiwan and the Japanese Islands. In addition, the Eurasian continent itself was shown to have been involved in the species diversification in the martens and weasels.
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Affiliation(s)
- T Hosoda
- Gobo Shoko High School, Yukawa, Japan
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25
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Hiroi Y, Chen R, Sawa H, Hosoda T, Kudoh S, Kobayashi Y, Aburatani H, Nagashima K, Nagai R, Yazaki Y, Medof ME, Komuro I. Cloning of murine glycosyl phosphatidylinositol anchor attachment protein, GPAA1. Am J Physiol Cell Physiol 2000; 279:C205-12. [PMID: 10898732 DOI: 10.1152/ajpcell.2000.279.1.c205] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Glycosyl phosphatidylinositols (GPIs) are used to anchor many proteins to the cell surface membrane and are utilized in all eukaryotic cells. GPI anchoring units are attached to proteins via a transamidase reaction mediated by a GPI transamidase complex. We isolated one of the components of this complex, mGPAA1 (murine GPI anchor attachment), by the signal sequence trap method. mGPAA1 cDNA is about 2 kb in length and encodes a putative 621 amino acid protein. The mGPAA1 gene has 12 small exons and 11 small introns. mGPAA1 mRNA is ubiquitously expressed in mammalian cells, and in situ hybridization analysis revealed that it is abundant in the choroid plexus, skeletal muscle, osteoblasts of rib, and occipital bone in mouse embryos. Its expression levels and transamidation efficiency decreased with differentiation of embryonic stem cells. The 3T3 cell lines expressing antisense mGPAA1 failed to express GPI-anchored proteins on the cell surface membrane.
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Affiliation(s)
- Y Hiroi
- Department of Cardiovascular Medicine, University of Tokyo Graduate School of Medicine, Tokyo 113-8655, Japan
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26
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Yamamoto Y, Murata K, Matsuda H, Hosoda T, Tamura K, Furuyama J. Determination of the complete nucleotide sequence and haplotypes in the D-loop region of the mitochondrial genome in the oriental white stork, Ciconia boyciana. Genes Genet Syst 2000; 75:25-32. [PMID: 10846618 DOI: 10.1266/ggs.75.25] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
The complete nucleotide sequence of the mitochondrial genome of the Oriental white stork, Ciconia boyciana, has been determined from captive storks by a novel method incorporating Long PCR and shotgun sequencing. 13 protein-coding genes, two ribosomal RNA genes and 22 transfer RNA genes were identified as in other vertebrate mitochondrial genomes. The position and direction of the NADH6 and tRNA-Glu genes were the same as previously reported for avian mitochondrial genomes. A 71 bp direct repeat and long CAAA repeat sequences were found at the 3' end of the D-loop region, together with SCB-1, SCB-2, SCB-3, and three TAS sequences. Direct sequencing of the PCR fragments in the D-loop region in 26 captive Oriental white storks originating from Japan, China, and Russia revealed nucleotide differences at 18 sites along 1,248 bp, and a total of nine haplotypes have been identified. It was found that one pair of individuals in the Japanese captive breeding program were of the same haplotype, suggesting that they were caught from the same nest. The pair has since been dissolved in consideration of the possibility of inbreeding depression.
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Affiliation(s)
- Y Yamamoto
- Department of Genetics, Hyogo College of Medicine, Japan.
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27
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Hosoda T, Kariya K, Tatsumi H, Kojima H, Katoo C, Okuda T, Tanaka K, Tamura T, Urabe M, Honjo H. Estrogen reduces the elevation of intracellular calcium concentration and cellular peroxidation induced by amyloid β protein. Int J Gynaecol Obstet 2000. [DOI: 10.1016/s0020-7292(00)84645-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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28
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Honio H, Kikuchi N, Kinoshita Y, Hosoda T, Kariya K, Tamura T, Urabe M. Long term effects of hrt on Alzheimer's disease. Int J Gynaecol Obstet 2000. [DOI: 10.1016/s0020-7292(00)86127-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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29
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Kikuchi N, Urabe M, Iwasa K, Okubo T, Tsuchiya H, Hosoda T, Tatsumi H, Honjo H. Atheroprotective effect of estriol and estrone sulfate on human vascular smooth muscle cells. J Steroid Biochem Mol Biol 2000; 72:71-8. [PMID: 10731640 DOI: 10.1016/s0960-0760(99)00149-1] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
In patients with atherosclerosis, fibrosclerotic focuses are induced by multiplication of vascular smooth muscle cells (VSMC), and they are regulated by cytokines and regulators. There have been few reports about the atheroprotective effect of estriol (E(3)). Estrone sulfate (E(1)-S) is the predominant estrogen of conjugated equiline estrogens, which is commonly used in hormone replacement therapy, but it should be hydrolyzed by steroid sulfatase (STS) to enter the cells of target tissues. The purpose of this study was to detect STS in VSMC and to investigate whether E(3) and E(1)-S have atheroprotective effects like E(2). First, we detected the presence of STS mRNA in VSMC by in situ hybridization. We then examined the changes in the expression of mRNAs of cytokines, namely, PDGF-A chain, IL-1, IL-6 and TGF-beta, in VSMC, in the presence and absence of E(3) and estrogens. As a result, the expression of PDGF-A chain, IL-1 and IL-6 mRNAs was suppressed by E(3) (P<0.05 vs control) significantly like E(1)-S and E(2), but that of TGF-beta mRNA was not significantly affected by any estrogen. These results indicate that E(1)-S can be hydrolyzed by STS in VSMC, and that E(3) may regulate the cytokines by suppressing the production of mRNAs. It is suggested that there is a possibility of E(1)-S and E(3) having a direct effect on vessels in atherogenesis.
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MESH Headings
- Arteriosclerosis/enzymology
- Arteriosclerosis/prevention & control
- Arylsulfatases/genetics
- Arylsulfatases/metabolism
- Cell Line
- Estradiol/pharmacology
- Estriol/pharmacology
- Estriol/therapeutic use
- Estrone/analogs & derivatives
- Estrone/metabolism
- Estrone/pharmacology
- Estrone/therapeutic use
- Gene Expression Regulation/drug effects
- Humans
- In Situ Hybridization
- Interleukin-1/genetics
- Interleukin-6/genetics
- Muscle, Smooth, Vascular/cytology
- Muscle, Smooth, Vascular/drug effects
- Muscle, Smooth, Vascular/enzymology
- Muscle, Smooth, Vascular/metabolism
- Platelet-Derived Growth Factor/genetics
- RNA, Messenger/genetics
- RNA, Messenger/metabolism
- Steryl-Sulfatase
- Transforming Growth Factor beta/genetics
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Affiliation(s)
- N Kikuchi
- Department of Obstetrics and Gynecology, Kyoto Prefectural University of Medicine, Kawaramachi-Hirokoji, Kamigyo-ku, Kyoto, Japan.
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30
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Monzen K, Shiojima I, Hiroi Y, Kudoh S, Oka T, Takimoto E, Hayashi D, Hosoda T, Habara-Ohkubo A, Nakaoka T, Fujita T, Yazaki Y, Komuro I. Bone morphogenetic proteins induce cardiomyocyte differentiation through the mitogen-activated protein kinase kinase kinase TAK1 and cardiac transcription factors Csx/Nkx-2.5 and GATA-4. Mol Cell Biol 1999; 19:7096-105. [PMID: 10490646 PMCID: PMC84704 DOI: 10.1128/mcb.19.10.7096] [Citation(s) in RCA: 194] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
Bone morphogenetic proteins (BMPs) have been shown to induce ectopic expression of cardiac transcription factors and beating cardiomyocytes in nonprecardiac mesodermal cells in chicks, suggesting that BMPs are inductive signaling molecules that participate in the development of the heart. However, the precise molecular mechanisms by which BMPs regulate cardiac development are largely unknown. In the present study, we examined the molecular mechanisms by which BMPs induce cardiac differentiation by using the P19CL6 in vitro cardiomyocyte differentiation system, a clonal derivative of P19 embryonic teratocarcinoma cells. We established a permanent P19CL6 cell line, P19CL6noggin, which constitutively overexpresses the BMP antagonist noggin. Although almost all parental P19CL6 cells differentiate into beating cardiomyocytes when treated with 1% dimethyl sulfoxide, P19CL6noggin cells did not differentiate into beating cardiomyocytes nor did they express cardiac transcription factors or contractile protein genes. The failure of differentiation was rescued by overexpression of BMP-2 or addition of BMP protein to the culture media, indicating that BMPs were indispensable for cardiomyocyte differentiation in this system. Overexpression of TAK1, a member of the mitogen-activated protein kinase kinase kinase superfamily which transduces BMP signaling, restored the ability of P19CL6noggin cells to differentiate into cardiomyocytes and concomitantly express cardiac genes, whereas overexpression of the dominant negative form of TAK1 in parental P19CL6 cells inhibited cardiomyocyte differentiation. Overexpression of both cardiac transcription factors Csx/Nkx-2.5 and GATA-4 but not of Csx/Nkx-2.5 or GATA-4 alone also induced differentiation of P19CL6noggin cells into cardiomyocytes. These results suggest that TAK1, Csx/Nkx-2.5, and GATA-4 play a pivotal role in the cardiogenic BMP signaling pathway.
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Affiliation(s)
- K Monzen
- Department of Cardiovascular Medicine, University of Tokyo Graduate School of Medicine, Tokyo 113-8655, Japan
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31
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Wakabayashi A, Utsuyama M, Hosoda T, Sato K, Hirokawa K. Differential age effect of oral administration of an antigen on antibody response: an induction of tolerance in young mice but enhancement of immune response in old mice. Mech Ageing Dev 1999; 109:191-201. [PMID: 10576334 DOI: 10.1016/s0047-6374(99)00036-6] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Sheep red blood cells (SRBC) were orally administered to young (4 months old) and old (22 months old) mice, and its effect on the antibody production after systemic immunization was compared between young and old mice. The results showed that the dose-dependent suppression of antibody response (oral tolerance) was observed in young mice which had been previously treated with oral administration of SRBC. On the contrary, the enhancement of antibody production was observed in old mice which had been treated in the same way. The enhanced level of IgG antibody in old mice was higher than that of young mice. The critical age determining either suppression or enhancement of antibody response after the oral administration of the antigen was present between 6.5 and 10.5 months of age. When the oral administration of the antigen was performed in young (3 months old) and middle-aged mice (12 months old), the oral tolerance for young and the enhanced antibody response for middle-aged mice were observed even at 6 months after the treatment. The analysis by in vitro antibody response using T and B cells prepared from young and old mice showed that age-related alteration of T and B cells is responsible for the suppression and the enhancement of antibody response after oral administration of SRBC, respectively.
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Affiliation(s)
- A Wakabayashi
- Japan Foundation for Aging and Health, Chita-gun, Aichi, Japan
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32
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Hosoda T, Komuro I, Shiojima I, Hiroi Y, Harada M, Murakawa Y, Hirata Y, Yazaki Y. Familial atrial septal defect and atrioventricular conduction disturbance associated with a point mutation in the cardiac homeobox gene CSX/NKX2-5 in a Japanese patient. Jpn Circ J 1999; 63:425-6. [PMID: 10943630 DOI: 10.1253/jcj.63.425] [Citation(s) in RCA: 45] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Atrial septal defect (ASD) is the most common form of congenital cardiac defect in humans. Recently, point mutations in the cardiac homeobox gene CSX/NKX2-5 have been reported to cause the autosomal dominant form of familial ASD. Notably, all the affected patients exhibit atrioventricular conduction disturbance and some of them died suddenly. The first case of familial ASD with a mutation of the CSX/NKX2-5 gene in a Japanese patient is reported here. Identification of CSX/NKX2-5 mutations in ASD patients would be very important because the existence of such mutations may predict sudden cardiac death.
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Affiliation(s)
- T Hosoda
- Department of Cardiovascular Medicine, University of Tokyo Graduate School of Medicine, Japan
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33
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Makino J, Saito Y, Nishiyama Y, Hosoda T, Matsubara H, Nakagawa M, Sakamoto T, Fujiyama Y, Bamba T. [A case of superior mesenteric artery embolism which was effectively treated by aspiration of embolus]. Nihon Shokakibyo Gakkai Zasshi 1999; 96:49-52. [PMID: 10047693] [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] [Subscribe] [Scholar Register] [Indexed: 02/11/2023]
Affiliation(s)
- J Makino
- Department of Gastroenterology, Koka Public Hospital
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34
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Hiroi Y, Komuro I, Matsushita I, Aburatani H, Hosoda T, Nakahori Y, Medof ME, Yazaki Y. Assignment of the human GPAA1 gene, which encodes a product required for the attachment of glycosylphosphatidylinositols to proteins, at 8q24. Genomics 1998; 54:354-5. [PMID: 9828142 DOI: 10.1006/geno.1998.5490] [Citation(s) in RCA: 5] [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: 11/22/2022]
Affiliation(s)
- Y Hiroi
- Department of Medicine III, University of Tokyo School of Medicine, Tokyo, 113-8655, USA
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35
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Hiroi Y, Komuro I, Chen R, Hosoda T, Mizuno T, Kudoh S, Georgescu SP, Medof ME, Yazaki Y. Molecular cloning of human homolog of yeast GAA1 which is required for attachment of glycosylphosphatidylinositols to proteins. FEBS Lett 1998; 421:252-8. [PMID: 9468317 DOI: 10.1016/s0014-5793(97)01576-7] [Citation(s) in RCA: 42] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Anchoring proteins to cell surface membranes by glycosylphosphatidylinositols (GPIs) is important. We have isolated a component of the putative transamidase machinery, hGaa1p (human GPI anchor attachment protein). hGAA1 cDNA is approximately 2 kb in length and codes 621 amino acids. The amino acid sequence of hGaa1p is 25%, identical and 57% homologous to that of yeast Gaa1p. Moreover, Kite-Dolittle hydrophobicity plots of both proteins show marked similarity. hGAA1 gene is expressed ubiquitously and mRNA levels are higher in the undifferentiated state. Overexpression of antisense hGAA1 in human K562 cells significantly reduced the production of a reporter GPI-anchored protein.
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Affiliation(s)
- Y Hiroi
- Department of Medicine III, University of Tokyo School of Medicine, Japan
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36
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Itoh Y, Ogawa A, Murata K, Hosoda T, Mizuno S. Identification of the sex of Oriental white stork, Ciconia boyciana, by the polymerase chain reaction based on its sex chromosome-specific DNA sequences. Genes Genet Syst 1997; 72:51-6. [PMID: 9248046 DOI: 10.1266/ggs.72.51] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
Southern blotting of HindIII-digested genomic DNAs from the female and male Oriental white stork (Ciconia boyciana) with the EE0.6 probe cloned from the W chromosome of chicken (Gallus domesticus) produced a 3.0-kb W chromosome-derived band specific to the female and a 3.5-kb Z chromosome-derived band common to both sexes. These two genomic fragments were cloned and the counterpart sequences to that of EE0.6 in these fragments, XH0.6 and XH0.6RSM (XH0.6-related sequence in the male), respectively, were subcloned. Nucleotide sequences of XH0.6 and XH0.6RSM showed 92% identity. PCR using a set of primer sequences from XH0.6, which differed several nucleotides from those in XH0.6RSM, amplified an about 300-bp genomic sequence only from the female C. boyciana. This method was applied successfully to identify the sex of individual young birds of C. boyciana, an endangered special natural monument in Japan and whose sexes are unidentifiable from their external morphology.
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Affiliation(s)
- Y Itoh
- Department of Applied Biological Chemistry, Faculty of Agriculture, Tohoku University, Sendai, Japan
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37
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Hosoda T, Toba K, Nagase T, Kozaki K, Hosoi T, Ohga E, Katayama H, Sudo E, Matsuse T, Fukuchi Y. [A case of pulmonary infiltration with eosinophilia (PIE) syndrome associated with syndrome of inappropriate secretion of ADH (SIADH) in the elderly patient]. Nihon Ronen Igakkai Zasshi 1995; 32:670-4. [PMID: 8551692 DOI: 10.3143/geriatrics.32.670] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
A 76-year-old woman was admitted to our hospital because of productive cough, fever and anorexia in January 1995. She had suffered from bronchial asthma for 25 years. From 1983, exacerbation of PIE was recorded three times, on which occasions prednisolone and antibiotics were quite effective. On admission, marked leukocytosis (28,000/microliters) and eosinophilia (18,000/microliters) were found. However, plasma IgE level was normal, and specific antigen for eosinophilia was not detected by RAST or the skin allergic reaction test. Chest X-ray film and CT scan revealed extensive bilateral pulmonary infiltration. Increase in eosinophils (33%) was demonstrated in bronchoalveolar lavage. Furthermore, biopsy specimen of the affected lung revealed diffuse infiltration of eosinophils into alveolar septa. On the basis of these findings, the patient was diagnosed as chronic eosinophilic pneumonia (PIE syndrome). Hyponatremia (117 mEq/l) was persistent after the hydration with normal saline. Plasma ADH was not suppressed (2.29 pg/ml) in spite of hypoosmolality of plasma. Laboratory examination showed that renal, adrenal and thyroid function as well as plasma renin activity were normal. Taking these findings together, she was diagnosed as having SIADH. Treatment with prednisolone improved not only the PIE syndrome but also SIADH.
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Affiliation(s)
- T Hosoda
- Department of Geriatrics, Faculty of Medicine, University of Tokyo
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38
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Hosoda S, Hosoda T. [Intestinal tuberculosis]. Nihon Rinsho 1994; Suppl 6:196-8. [PMID: 7837445] [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] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- S Hosoda
- Second Department of Internal Medicine, Shiga University of Medical Science
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39
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Suzuki H, Hosoda T, Sakurai S, Tsuchiya K, Munechika I, Korablev VP. Phylogenetic relationship between the Iriomote cat and the leopard cat, Felis bengalensis, based on the ribosomal DNA. Jpn J Genet 1994; 69:397-406. [PMID: 7946460 DOI: 10.1266/jjg.69.397] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
We analyzed the restriction fragment length polymorphisms in the spacer regions of ribosomal DNA (rDNA), using twelve restriction enzymes, to examine whether the Iriomote cat is related to the leopard cat (Felis bengalensis). A restriction map for each taxon was constructed and the major taxon-specific types of repeating unit (repetypes) were characterized on the basis of the arrangements of restriction sites. The Iriomote cat and the leopard cat share a common repetype but this repetype is different from that of the domestic cat (F. catus) with an estimated sequence divergence of 1.5% and from that of the ocelot (F. paradalis) with an estimated sequence divergence of 2.5%. These results indicate that, phylogenetically, the Iriomote cat is closely related to the leopard cat and that the ancestral population moved from the continent to Iriomote Island quite recently. The rDNA arrays of the leopard cat exhibit considerable intragenomic size-variation, which is thought to have emerged as a result of differences in numbers of repeated DNA segments, whereas the extent of such size-variation is much lower in the rDNA of the Iriomote cat. It appears that, even though migration of the Iriomote cat occurred relatively recently, the population has diverged to some extent from its continental counterpart, perhaps via fixation of preexistent intraspecific variations rather than by generation of new variations.
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Affiliation(s)
- H Suzuki
- Division of Molecular Genetics, Jikei University School of Medicine, Tokyo, Japan
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40
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41
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Obara T, Hosoda T, Tohmatsu J, Sakashita H, Arima T. [HCV subtypes and their clinical significance]. Nihon Rinsho 1993; 51:312-7. [PMID: 7681881] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
We immunologically isolated a clone with a 177-bp DNA fragment, designated as #2-22, that had homology to the NS-5 region of a HCV genome. To classify this HCV isolate, we sequenced several clones (2028 bases in total) from a cDNA library constructed from a #2-22-positive patient's blood. They showed distinct similarity to the HC-J8 genome (type II b), among the known HCV subtypes. Using this #2-22 sequence for PCR, we screened the HCV-positive blood samples from Southern Kyushu, we could identify 27% of them as type II b. In another cDNA library, from a single blood donor, who did not have multiple infections of HCV, we found two clones that might have arisen from an ancestral (or previous or historical) intergenomic recombination. They had reversed orders of similarity to different HCV subtypes, that is, the first 149-bp clone had 94% identical bases with a segment of HC-J8 and 78% with the corresponding sequence of HC-J6, but the second 814-bp clone had 85% identical bases with a segment of HC-J8 and 94% to the corresponding sequence of HC-J6. The importance of subtype analysis is discussed in relation to its clinical application, such as diagnostics development.
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Affiliation(s)
- T Obara
- Second Department of Internal Medicine, Faculty of Medicine, Kagoshima University
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42
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Fujimoto S, Murakami K, Hosoda T, Yamamoto Y, Watanabe K, Morinaka Y, Ohara A. Characterization of cationic acid phosphatase isozyme from rat liver mitochondria. Chem Pharm Bull (Tokyo) 1992; 40:1231-5. [PMID: 1394639 DOI: 10.1248/cpb.40.1231] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Acid phosphatase isozyme was highly purified from rat liver mitochondrial fraction. The enzyme showed an isoelectric point value of above 9.5 on isoelectric focusing, and the apparent molecular weight was estimated to be 32000 by Sephadex G-100 gel filtration or 16000 by sodium dodecyl sulfate-polyacrylamide gel electrophoresis. The enzyme catalyzed the hydrolysis of adenosine 5'-triphosphate, adenosine 5'-diphosphate, thiamine pyrophosphate, inorganic pyrophosphate, and phosphoprotein such as casein and phosvitin, but not of several phosphomonoesters, except for p-nitrophenyl phosphate and o-phosphotyrosine. The enzyme was not inhibited by L-(+)-tartrate, and was significantly activated by Fe2+ and reducing agents such as ascorbic acid, L-cysteine,and dithiothreitol. The enzyme was found to be distributed in various rat tissues including liver, spleen, kidney, small intestine, lung, stomach, brain and heart, but not in skeletal muscle.
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43
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Hosoda T, Bamba T, Hosoda S. [Ileal absorption of various amino acids and dipeptides in rats administered cyclophosphamide--using the short-circuit current method]. Nihon Shokakibyo Gakkai Zasshi 1991; 88:2837-46. [PMID: 1817194] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Transport of amino acids; glycine, L-alanine, L-leucine, L-proline, L-lysine and dipeptides; gly-gly, gly-L-pro, gly-L-leu, L-leu-gly was investigated by measuring the short-circuit current in control rats and the rats 3 days after intraperitoneal injection of cyclophosphamide (CPM) 300 mg/kg. For determining active transport using the short-circuit current method in injured intestinal epithelia the short-circuit current measured should be corrected for the decrease in the mucosal resistance of CPM group. Jmax values for transport of glycine and L-alanine in ileum are significantly decreased in CPM group than in control group. Contrariwise, there are no differences in Jmax values for peptides transport in ileum between two groups. The results indicate that the glycine transport carrier is more sensitive to CPM injury than the peptide transport carrier for glycine-containing dipeptide, suggesting the clinical usefulness of the peptide nutrition during chemotherapy.
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Affiliation(s)
- T Hosoda
- Second Department of Internal Medicine, Shiga University of Medical Science
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44
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Yoshida T, Okabe H, Ochi Y, Hosoda T, Fujiyama Y, Hosoda S. [A case of sarcoidosis with increased CD3+ WT31- CD16+ lymphocytes]. Rinsho Byori 1991; 39:675-7. [PMID: 1831868] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Increase of CD16+ cells in the peripheral blood is not uncommon for sarcoidosis. However, further subclassification of such cells have not been reported yet. Here, we report a case of sarcoidosis developed in 71 year-old female who had abundant CD16+ lymphocytes in the peripheral blood and most of them were revealed to be CD3+ WT31- by analysis using cell sorting. Although exact role of these cells is remained to be solved, they seem to be implicated in the immune disorder of this disease.
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Affiliation(s)
- T Yoshida
- Central Clinical Laboratory, Shiga University of Medical Science, Otsu
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Heiguchi K, Hosoda T, Komatsubara T, Nomura T, Furuno K, Nakatani R, Mitarai S, Kuroyanagi T. Half-lives andQ ? measurements for new nuclei of89Tc and89mTc. ACTA ACUST UNITED AC 1991. [DOI: 10.1007/bf01279110] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [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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46
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Takaue Y, Reading CL, Watanabe T, Kawano Y, Ninomiya T, Iishi Y, Kosaka M, Shimizu E, Ichioka T, Hosoda T. Cell-mediated suppression of human hematopoiesis: evaluation by limiting-dilution analysis of hematopoietic progenitors. Am J Hematol 1989; 32:205-11. [PMID: 2816915 DOI: 10.1002/ajh.2830320309] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
We have used limiting-dilution clonal analysis (LDA) in microwells to study the inhibitory effects of T lymphocytes (T-cells) or natural killer (NK) cells on human marrow progenitor cell growth. In four subjects with normal hematopoiesis, the growth of progenitors showed single-hit kinetics both before and after T-cell removal, indicating that, in the presence of colony-stimulating activity, T-cell have no effect on progenitor growth. In a patient with marrow hypoplasia associated with thymoma, hypogammaglobulinemia, and an increased number of suppressor T-cells (Good's syndrome), the progenitor growth deviated from linearity, demonstrating the presence of cells with suppressor activity. After T-cells were removed from this sample, the progenitor growth showed single-hit kinetics. The suppressive action of E-rosette-positive cells with NK or cytotoxic activities was also suggested in a patient with severe combined immune deficiency and in a patient with T gamma lymphocytosis. Poor progenitor-cell growth in three other patients with aplastic anemia was not significantly altered by T-cell removal. Thus, LDA of human hematopoietic progenitors is useful for evaluating cell-mediated interactions affecting hematopoiesis. This method may facilitate elucidation of mechanisms of myelosuppression in clinical settings.
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Affiliation(s)
- Y Takaue
- Department of Pediatrics, University Hospital of Tokushima, Japan
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47
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Tayama M, Ichioka T, Hosoda T, Miyao M. [Clinical experience with clarithromycin in the pediatric field]. Jpn J Antibiot 1989; 42:388-92. [PMID: 2526251] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Clarithromycin (TE-031, A-56268) was orally administered to 20 children with the following acute bacterial infections; 1 case of acute pharyngitis, 3 cases of acute tonsillitis, 11 cases of acute bronchitis, 1 case of exacerbation of chronic bronchitis, 1 case of acute bronchopneumonia, 2 cases of Mycoplasma pneumonia and 1 case of impetigo. Clinical effectiveness was obtained in 15 out of the 20 cases (75.0%). No clinical side effects and laboratory abnormalities were observed. The above results suggest that TE-031 is a useful antibiotics for treating pediatric patients with various bacterial infections.
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Affiliation(s)
- M Tayama
- Department of Pediatrics, School of Medicine, Tokushima University
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Harada H, Sugawara M, Kusakari H, Shinohara H, Ono Y, Furuno K, Hosoda T, Adachi M, Matsuki S, Kawamura N. High-spin states in 114Sn. Phys Rev C Nucl Phys 1989; 39:132-138. [PMID: 9955168 DOI: 10.1103/physrevc.39.132] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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49
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Enomoto S, Kaminishi T, Hosoda T, Suzuki H. [Equipments and instruments for use in radiological protection. VII. Characteristics and use of radiation protection apparatus (1)]. Radioisotopes 1988; 37:123-32. [PMID: 3393698 DOI: 10.3769/radioisotopes.37.2_123] [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] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- S Enomoto
- Department of Electrical and Electronic Engineering, Toyohashi University of Technology, Toyohashi-shi, Japan
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Hosoda T, Ichioka T, Miyao M. [Pharmacokinetic and clinical experience with flomoxef in bacterial infection in children]. Jpn J Antibiot 1987; 40:1462-8. [PMID: 3430721] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Pharmacokinetic and clinical studies were performed on flomoxef (FMOX, 6315-S), a new oxacephem antibiotic, as follows. 1. Pharmacokinetics Serum concentrations of FMOX were measured in 2 cases given 20 mg/kg bolus injection. In the 2 cases, peak concentrations of the drug were 44.3 and 197 micrograms/ml at 15 minutes, T1/2 (beta) were 0.76 and 0.47 hour and AUC were 44.8 and 169.5 micrograms.hr/ml, respectively. Urinary recovery rates for these cases during 6 hours were 83.1 and 54.9%, respectively. The extremely high peak serum concentration in one case may be attributed to dehydration. 2. Clinical efficacy FMOX was administrated intravenously to 12 patients, 6 with pneumonia, 2 with cellulitis, 1 each with bronchitis, tonsillitis, purulent lymphadenitis and subcutaneous abscess, in doses of 55.0-120.0 mg/kg (average 82.2 mg/kg) t.i.d. for 4-13 days (average 6.2 days). The overall efficacy rate was 100%, with excellent responses in 10 and good in 2. Bacteriological efficacy was excellent; 4 of 5 strains were eradicated and 1 strain was decreased. No clinical side effect was observed. Laboratory abnormality was observed in 1 case with transient eosinophilia. The above results suggested that FMOX would be an useful antibiotic for treating pediatric bacterial infections.
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Affiliation(s)
- T Hosoda
- Department of Pediatrics, School of Medicine, Tokushima University
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