1
|
Matsunaga G, Shibama Y, Okano F, Yagyu J, Takechi M, Kizu K, Hamada K, Murakami H, Moriyama S, Hanada M, Tomarchio V, Di Pietro E, Mizumaki S, Sagawa K, Hayakawa A. Achievement of precise assembly of the JT-60SA superconducting tokamak. Fusion Engineering and Design 2022. [DOI: 10.1016/j.fusengdes.2021.112961] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
2
|
Nakai Y, Nagashima A, Hayakawa A, Osuki T, Jeong JW, Sugiura A, Brown EC, Asano E. Four-dimensional map of the human early visual system. Clin Neurophysiol 2017; 129:188-197. [PMID: 29190524 DOI: 10.1016/j.clinph.2017.10.019] [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] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2017] [Revised: 09/29/2017] [Accepted: 10/06/2017] [Indexed: 11/30/2022]
Abstract
OBJECTIVE We generated a large-scale, four-dimensional map of neuronal modulations elicited by full-field flash stimulation. METHODS We analyzed electrocorticography (ECoG) recordings from 63 patients with focal epilepsy, and delineated the spatial-temporal dynamics of visually-elicited high-gamma70-110 Hz amplitudes on a standard brain template. We then clarified the neuronal events underlying visual evoked potential (VEP) components, by correlating with high-gamma amplitude measures. RESULTS The medial-occipital cortex initially revealed rapid neural activation followed by prolonged suppression, reflected by augmentation of high-gamma activity lasting up to 100 ms followed by attenuation lasting up to 1000 ms, respectively. With a number of covariate factors incorporated into a prediction model, the eccentricity representation independently predicted the magnitude of post-activation suppression, which was more intense in regions representing more parafoveal visual fields compared to those of more peripheral fields. The initial negative component on VEP was sharply contoured and co-occurred with early high-gamma augmentation, whose offset then co-occurred with a large positive VEP peak. A delayed negative VEP peak was blunt and co-occurred with prolonged high-gamma attenuation. CONCLUSIONS Eccentricity-dependent gradient in neural suppression in the medial-occipital region may explain the functional difference between peripheral and parafoveal/central vision. Early negative and positive VEP components may reflect neural activation, whereas a delayed negative VEP peak reflecting neural suppression. SIGNIFICANCE Our observation provides the mechanistic rationale for transient scotoma or mild flash-blindness, characterized by physiological afterimage preferentially formed in central vision following intense but non-injurious light exposure.
Collapse
Affiliation(s)
- Yasuo Nakai
- Department of Pediatrics, Wayne State University, Children's Hospital of Michigan, Detroit Medical Center, Detroit, MI 48201, USA; Department of Neurological Surgery, Wakayama Medical University, Wakayama-shi, Wakayama 6418510, Japan
| | - Akari Nagashima
- Department of Pediatrics, Wayne State University, Children's Hospital of Michigan, Detroit Medical Center, Detroit, MI 48201, USA
| | - Akane Hayakawa
- Department of Pediatrics, Wayne State University, Children's Hospital of Michigan, Detroit Medical Center, Detroit, MI 48201, USA
| | - Takuya Osuki
- Department of Pediatrics, Wayne State University, Children's Hospital of Michigan, Detroit Medical Center, Detroit, MI 48201, USA
| | - Jeong-Won Jeong
- Department of Pediatrics, Wayne State University, Children's Hospital of Michigan, Detroit Medical Center, Detroit, MI 48201, USA; Department of Neurology, Wayne State University, Children's Hospital of Michigan, Detroit Medical Center, Detroit, MI 48201, USA
| | - Ayaka Sugiura
- Department of Pediatrics, Wayne State University, Children's Hospital of Michigan, Detroit Medical Center, Detroit, MI 48201, USA
| | - Erik C Brown
- Department of Neurological Surgery, Oregon Health and Science University, Portland, OR 97239, USA
| | - Eishi Asano
- Department of Pediatrics, Wayne State University, Children's Hospital of Michigan, Detroit Medical Center, Detroit, MI 48201, USA; Department of Neurology, Wayne State University, Children's Hospital of Michigan, Detroit Medical Center, Detroit, MI 48201, USA.
| |
Collapse
|
3
|
Kambara T, Sood S, Alqatan Z, Klingert C, Ratnam D, Hayakawa A, Nakai Y, Luat AF, Agarwal R, Rothermel R, Asano E. Presurgical language mapping using event-related high-gamma activity: The Detroit procedure. Clin Neurophysiol 2017; 129:145-154. [PMID: 29190521 DOI: 10.1016/j.clinph.2017.10.018] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2017] [Revised: 09/25/2017] [Accepted: 10/17/2017] [Indexed: 10/18/2022]
Abstract
A number of investigators have reported that event-related augmentation of high-gamma activity at 70-110 Hz on electrocorticography (ECoG) can localize functionally-important brain regions in children and adults who undergo epilepsy surgery. The advantages of ECoG-based language mapping over the gold-standard stimulation include: (i) lack of stimulation-induced seizures, (ii) better sensitivity of localization of language areas in young children, and (iii) shorter patient participant time. Despite its potential utility, ECoG-based language mapping is far less commonly practiced than stimulation mapping. Here, we have provided video presentations to explain, point-by-point, our own hardware setting and time-frequency analysis procedures. We also have provided standardized auditory stimuli, in multiple languages, ready to be used for ECoG-based language mapping. Finally, we discussed the technical aspects of ECoG-based mapping, including its pitfalls, to facilitate appropriate interpretation of the data.
Collapse
Affiliation(s)
- Toshimune Kambara
- Wayne State University, School of Medicine, Detroit, MI 48201, USA; Department of Pediatrics, Children's Hospital of Michigan, Detroit Medical Center, Detroit, MI 48201, USA; Postdoctoral Fellowship for Research Abroad, Japan Society for the Promotion of Science (JSPS), Chiyoda-ku, Tokyo 1020083, Japan
| | - Sandeep Sood
- Wayne State University, School of Medicine, Detroit, MI 48201, USA; Department of Neurosurgery, Children's Hospital of Michigan, Detroit Medical Center, Detroit, MI 48201, USA
| | - Zahraa Alqatan
- Wayne State University, School of Medicine, Detroit, MI 48201, USA
| | | | - Diksha Ratnam
- Wayne State University, School of Medicine, Detroit, MI 48201, USA
| | - Akane Hayakawa
- Department of Pediatrics, Children's Hospital of Michigan, Detroit Medical Center, Detroit, MI 48201, USA
| | - Yasuo Nakai
- Wayne State University, School of Medicine, Detroit, MI 48201, USA; Department of Pediatrics, Children's Hospital of Michigan, Detroit Medical Center, Detroit, MI 48201, USA
| | - Aimee F Luat
- Wayne State University, School of Medicine, Detroit, MI 48201, USA; Department of Pediatrics, Children's Hospital of Michigan, Detroit Medical Center, Detroit, MI 48201, USA; Department of Neurology, Children's Hospital of Michigan, Detroit Medical Center, Detroit, MI 48201, USA
| | - Rajkumar Agarwal
- Wayne State University, School of Medicine, Detroit, MI 48201, USA; Department of Pediatrics, Children's Hospital of Michigan, Detroit Medical Center, Detroit, MI 48201, USA; Department of Neurology, Children's Hospital of Michigan, Detroit Medical Center, Detroit, MI 48201, USA
| | - Robert Rothermel
- Wayne State University, School of Medicine, Detroit, MI 48201, USA; Department of Psychiatry, Children's Hospital of Michigan, Detroit Medical Center, Detroit, MI 48201, USA
| | - Eishi Asano
- Wayne State University, School of Medicine, Detroit, MI 48201, USA; Department of Pediatrics, Children's Hospital of Michigan, Detroit Medical Center, Detroit, MI 48201, USA; Department of Neurology, Children's Hospital of Michigan, Detroit Medical Center, Detroit, MI 48201, USA.
| |
Collapse
|
4
|
Takahashi K, Imai T, Kobayashi N, Sakamoto K, Kasugai A, Hayakawa A, Mori S, Mohri K. Design Performance of Front Steering-Type Electron Cyclotron Launcher for ITER. Fusion Science and Technology 2017. [DOI: 10.13182/fst05-a594] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- K. Takahashi
- Japan Atomic Energy Research Institute, Naka, Ibaraki 311-0193, Japan
| | - T. Imai
- Japan Atomic Energy Research Institute, Naka, Ibaraki 311-0193, Japan
| | - N. Kobayashi
- Japan Atomic Energy Research Institute, Naka, Ibaraki 311-0193, Japan
| | - K. Sakamoto
- Japan Atomic Energy Research Institute, Naka, Ibaraki 311-0193, Japan
| | - A. Kasugai
- Japan Atomic Energy Research Institute, Naka, Ibaraki 311-0193, Japan
| | - A. Hayakawa
- Toshiba Company, Yokohama, Kanagawa 235-8523, Japan
| | - S. Mori
- Kawasaki Heavy Industry Company, Kotoh, Tokyo 136-8588, Japan
| | - K. Mohri
- Kawasaki Heavy Industry Company, Kotoh, Tokyo 136-8588, Japan
| |
Collapse
|
5
|
Jin G, Onodera S, Saito M, Maruyama Y, Hayakawa A, Sato T, Ota Y, Aritomi D. Vertical distribution of sediment phosphorus in Lake Hachirogata related to the effect of land reclamation on phosphorus accumulation. Environ Technol 2016; 37:486-494. [PMID: 26586450 DOI: 10.1080/09593330.2015.1117043] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The focus of this work is the change in sediment properties and chemical characteristics that occur after land reclamation projects. The results indicate a higher sedimentation rate in Lake Hachirogata after reclamation, with the rate increasing with proximity to the agricultural zone. In the west-side water samples, higher levels of dissolved total nitrogen and dissolved total phosphorus (DTP) were found in both surface and bottom waters. The increase in P (39-80%) was generally greater than that for N (12-16%), regarding the nutrient supply from reclaimed farmland in the western part of the lake. In the eastern part of the lake, the pore-water Cl- profile showed a decreasing vertical gradient in the sediment core. This indicates desalination of the lake water after construction of a sluice gate in 1961. In the western sediment-core sample, a uniform Cl- profile indicates the mixing of lake water and pore water after reclamation. Considering the sedimentation of P in the last 100 years, there is a trend of increasing accumulation of P and P-activities after the reclamation project. This appears to be an impact from change in the lake environment as a result of increased agricultural nutrients, desalination, and residence. A large amount of mobile phosphorus (42-72% of TP in the western core sample) trapped in sediment increases the risk of phosphorus release and intensification of algal blooms. High sediment phosphorus and phosphorus mobility should be considered a source of pollution in the coastal environment.
Collapse
Affiliation(s)
- G Jin
- a Graduate School of Integrated Arts and Sciences, Hiroshima University , C611, 1-7-1, Kagamiyama, Higashi-Hiroshima , Japan
| | - S Onodera
- a Graduate School of Integrated Arts and Sciences, Hiroshima University , C611, 1-7-1, Kagamiyama, Higashi-Hiroshima , Japan
| | - M Saito
- b Graduate School of Environmental and life Science, Okayama University , 3-1-1 Tsushima-naka, Kita-ku, Okayama-shi , Japan
| | - Y Maruyama
- a Graduate School of Integrated Arts and Sciences, Hiroshima University , C611, 1-7-1, Kagamiyama, Higashi-Hiroshima , Japan
| | - A Hayakawa
- c Department of Biological Environment , Akita Prefectural University , 241-438 Kaidobata Nishi, Nakano, Shimoshinjo , Akita-shi , Japan
| | - T Sato
- a Graduate School of Integrated Arts and Sciences, Hiroshima University , C611, 1-7-1, Kagamiyama, Higashi-Hiroshima , Japan
| | - Y Ota
- d Atmosphere and Ocean Research Institute, the University of Tokyo , 5-1-5 Kashiwanoha, Kashiwa , Chiba Japan
| | - D Aritomi
- a Graduate School of Integrated Arts and Sciences, Hiroshima University , C611, 1-7-1, Kagamiyama, Higashi-Hiroshima , Japan
| |
Collapse
|
6
|
Shibanuma K, Arai T, Hasegawa K, Hoshi R, Kamiya K, Kawashima H, Kubo H, Masaki K, Saeki H, Sakurai S, Sakata S, Sakasai A, Sawai H, Shibama Y, Tsuchiya K, Tsukao N, Yagyu J, Yoshida K, Kamada Y, Mizumaki S, Hayakawa A, Takigami H, Barabaschi P, Davis S, Peyrot M, Phillips G. Assembly study for JT-60SA tokamak. Fusion Engineering and Design 2013. [DOI: 10.1016/j.fusengdes.2012.12.011] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
7
|
Shimizu S, Harada T, Nakahara K, Hirata E, Hasegawa M, Hayakawa A, Aizawa S, Katayama Y, Uchiyama M. P24-24 EEG recording with handy sized mobile electroencephalograph in the mountain. Clin Neurophysiol 2010. [DOI: 10.1016/s1388-2457(10)61021-8] [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: 10/18/2022]
|
8
|
Ishikawa M, Kondoh T, Ookawa K, Fujita K, Yamauchi M, Hayakawa A, Nishitani T, Kusama Y. Development of in-vessel components of the microfission chamber for ITER. Rev Sci Instrum 2010; 81:10D308. [PMID: 21033834 PMCID: PMC2973982 DOI: 10.1063/1.3485080] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2010] [Accepted: 07/26/2010] [Indexed: 05/30/2023]
Abstract
Microfission chambers (MFCs) will measure the total neutron source strength in ITER. The MFCs will be installed behind blanket modules in the vacuum vessel (VV). Triaxial mineral insulated (MI) cables will carry signals from the MFCs. The joint connecting triaxial MI cables in the VV must be considered because the MFCs and the MI cables will be installed separately at different times. Vacuum tight triaxial connector of the MI cable has been designed and a prototype has been constructed. Performance tests indicate that the connector can be applied to the ITER environment. A small bending-radius test of the MI cable indicates no observed damage at a curvature radius of 100 mm.
Collapse
Affiliation(s)
- M Ishikawa
- Japan Atomic Energy Agency, 801-1, Mukoyama, Naka 311-0193, Japan.
| | | | | | | | | | | | | | | |
Collapse
|
9
|
Kobayashi N, Ogawa Y, Okutsu H, Hayakawa A. Experimental study of a single tube high RF power amplifier for ICRF heating system. Fusion Engineering and Design 2007. [DOI: 10.1016/j.fusengdes.2005.12.006] [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: 11/26/2022]
|
10
|
Hayakawa A, Shimizu M, Woli KP, Kuramochi K, Hatano R. Evaluating stream water quality through land use analysis in two grassland catchments: impact of wetlands on stream nitrogen concentration. J Environ Qual 2006; 35:617-27. [PMID: 16510707 DOI: 10.2134/jeq2005.0343] [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] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
We evaluated the impacts of natural wetlands and various land uses on stream nitrogen concentration in two grassland-dominated catchments in eastern Hokkaido, Japan. Analyzing land use types in drainage basins, measuring denitrification potential of its soil, and water sampling in all seasons of 2003 were performed. Results showed a highly significant positive correlation between the concentration of stream NO3-N and the proportion of upland area in drainage basins in both catchments. The regression slope, which we assumed to reflect the impact on water quality, was 24% lower for the Akkeshi catchment (0.012 +/- 0.001) than for the Shibetsu catchment (0.016 +/- 0.001). In the Akkeshi catchment, there was a significant negative correlation between the proportion of wetlands in the drainage basins and stream NO3-N concentration. Stream dissolved organic nitrogen (DON) and carbon (DOC) concentrations were significantly higher in the Akkeshi catchment. Upland and urban land uses were strongly linked to increases in in-stream N concentrations in both catchments, whereas wetlands and forests tended to mitigate water quality degradation. The denitrification potential of the soils was highest in wetlands, medium in riparian forests, and lowest in grasslands; and was significant in wetlands and riparian forests in the Akkeshi catchment. The solubility of soil organic carbon (SOC) and soil moisture tended to determine the denitrification potential. These results indicate that the water environment within the catchments, which influences denitrification potential and soil organic matter content, could have caused the difference in stream water quality between the two catchments.
Collapse
Affiliation(s)
- A Hayakawa
- Laboratory of Soil Science, Graduate School of Agriculture, Hokkaido University, Sapporo, 060-8589 Japan.
| | | | | | | | | |
Collapse
|
11
|
Abstract
A small agonistic peptide FRAP-4 (WEWT, Fas reactive peptide-4) that binds to the human Fas molecule was discovered using our computer screening strategy named the Amino acid Complement Wave (ACW) method, which is based on the complementarities of interacting amino acids between comprehensive testing peptides and a target protein surface pocket. In silico docking studies demonstrated the specific interaction of FRAP-4 with the main Fas ligand (FasL) binding domain in the Fas molecule. An octamer of this peptide produced by carboxyl terminal linkages of polylysine branches (MAP), (FRAP-4)8-MAP, effectively induced apoptosis in human ovarian cancer cell line NOS4 cells that was associated with the activation of caspases-8, -9 and -3, and the cleavage of PARP. Alanine substitution of the N-terminal W in FRAP-4 resulted in complete loss of FasL-mimetic action of (FRAP-4)8-MAP, suggesting that the aromatic functionality at the N-terminal position W appears to play an essentially important role in Fas binding ability. These observations indicate that the FasL-mimetic peptide should serve as an excellent starting point for the design of effective compounds with FasL-mimetic activity. Furthermore, the ACW method for the structure-based design of optimized small peptides against receptor molecules such as Fas could open new avenues for the development of peptide mimetic and nonpeptidic organic forms to generate novel effective pharmaceuticals.
Collapse
Affiliation(s)
- A Yoshimori
- Research Institute for Biological Sciences, Tokyo University of Science, 2669 Yamazaki Noda, Chiba, 278-0022, Japan
| | | | | | | | | | | |
Collapse
|
12
|
Takeuchi M, Hayakawa A, Takagi K, Hiramatsu K, Shimizu Y, Matsumoto S, Hiramatsu T, Ito Y, Kume H, Suzuki R, Yamaki K. Theophylline induces apoptosis of the IL-3 activated eosinophils of patients with bronchial asthma. Apoptosis 2003; 4:461-8. [PMID: 14634331 DOI: 10.1023/a:1009656527168] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
In bronchial asthma, eosinophils are upregulated and their survival is suggested to be prolonged by the action of some cytokines such as Interleukin (IL)-3, IL-5 and granulocyte-macrophage colony-stimulating factor (GM-CSF). We find here that the survival of eosinophils in the peripheral blood of patients with asthma is correlated with the serum levels of IL-3 but not of IL-5 and GM-CSF. Interestingly, theophylline is revealed to induce apoptosis of the prolonged survival eosinophils by IL-3, as judged by morphological changes and nucleosomal DNA fragmentation. During the apoptosis, caspase-3 in eosinophils stimulated by IL-3 is activated by theophylline. The substrate of caspase-3, poly (ADP-ribose) polymerase (PARP), is cleaved in the eosinophils after theophylline treatment. These results suggest that theophylline is able to induce apoptosis of the IL-3 activated eosinophils in patients with bronchial asthma, and that its clinical effectiveness may be due to the reduction of inflammatory cells in the airway.
Collapse
Affiliation(s)
- M Takeuchi
- Second Department of Internal Medicine, Nagoya University School of Medicine, Nagoya, Japan
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
13
|
Nara T, Hayakawa A, Ikeuchi A, Katoh N, Kishimoto S. Granulocyte colony-stimulating factor-producing cutaneous angiosarcoma with leukaemoid reaction arising on a burn scar. Br J Dermatol 2003; 149:1273-5. [PMID: 14674908 DOI: 10.1111/j.1365-2133.2003.05684.x] [Citation(s) in RCA: 16] [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: 11/29/2022]
Abstract
We report a 46-year-old man with a giant tumour in a burn scar on his buttock. Pathological examination revealed that the dermis was filled with anastomosing vascular channels and round- or spindle-type atypical cells, which were compatible with the diagnosis of cutaneous angiosarcoma. Based on prominent leucocytosis (up to 113 000 microL-1), we measured serum granulocyte colony-stimulating factor (G-CSF). The highly elevated serum G-CSF of 303 ng L-1 (normal, 6.1-21.5 ng L-1) and positive immunohistochemical staining of the tumour tissue for G-CSF indicated that G-CSF was produced by the cutaneous angiosarcoma. To our knowledge, this is the first reported case of G-CSF-producing cutaneous angiosarcoma.
Collapse
Affiliation(s)
- T Nara
- Department of Dermatology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kawaramachi-Hirokoji, Kamigyo-ku, Kyoto 602-8566, Japan.
| | | | | | | | | |
Collapse
|
14
|
Hayakawa A, Wu J, Kawamoto Y, Zhou YW, Tanuma S, Nakashima I, Suzuki H. Activation of caspase-8 is critical for sensitivity to cytotoxic anti-Fas antibody-induced apoptosis in human ovarian cancer cells. Apoptosis 2002; 7:107-13. [PMID: 11865194 DOI: 10.1023/a:1014302212321] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Two ovarian cancer cell lines named NOS4 and SKOV-3 have been shown to have different sensitivities to a cytotoxic anti-Fas antibody, CH-11. Although both cell lines express Fas molecules on the cell surfaces at the same intensities, apoptosis is induced by CH-11 in NOS4 cells but not in SKOV-3 cells. In this study, the different apoptosis-sensitivities of these cells were assessed. Both cell lines express almost the same levels of FADD, RIP, c-FLIP, FAP-1, Bax, Bcl-2 and Bcl-XL. Evidence of caspase-8, caspase-9 and caspase-3 activation and of cleavage of PARP and Bid was obtained in NOS4 cells but not in SKOV-3 cells. When triggered by FasL protein, DNA fragmentation and caspase-8 activation were observed in SKOV-3 cells, though they were not as clear as in NOS4 cells. All the anti-Fas antibody-mediated signals for apoptosis induction in NOS4 cells were completely blocked by a caspase-8-specific inhibitor, Z-IETD-FMK. These results indicate that the different sensitivities to the anti-Fas antibody are solely dependent on the activation of caspase-8, which could be influenced by yet unknown qualitative or quantitative abnormalities in molecules involved in DISC formation.
Collapse
Affiliation(s)
- A Hayakawa
- Department of Equipment Center for Research and Education, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya 466-8550, Japan
| | | | | | | | | | | | | |
Collapse
|
15
|
Kakegawa T, Hayakawa A, Goto A, Tamura S, Saito H, Kobayashi H. [Mechanism in the cytoplasm accumulation of TOP binding factor]. Jpn J Antibiot 2001; 54 Suppl C:94-6. [PMID: 12575429] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/28/2023]
|
16
|
Yamada S, Kitagawa S, Chikaraishi H, Murai K, Mizuno Y, Saito F, Hayakawa A, Sawamura H, Ise T, Sato Y, Kaneko O, Nakamura Y, Satow T, Motojima O. Stabilization of power system for large-scaled experimental fusion facility. Fusion Engineering and Design 2001. [DOI: 10.1016/s0920-3796(01)00285-x] [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] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
|
17
|
Zhu J, Hayakawa A, Kakegawa T, Kaspar RL. Binding of the La autoantigen to the 5' untranslated region of a chimeric human translation elongation factor 1A reporter mRNA inhibits translation in vitro. Biochim Biophys Acta 2001; 1521:19-29. [PMID: 11690632 DOI: 10.1016/s0167-4781(01)00277-9] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Human translation elongation factor 1A (EF1A) is a member of a large class of mRNAs, including ribosomal proteins and other translation elongation factors, which are coordinately translationally regulated under various conditions. Each of these mRNAs contains a terminal oligopyrimidine tract (TOP) that is required for translational control. A human growth hormone (hGH) expression construct containing the promoter region and 5' untranslated region (UTR) of EF1A linked to the hGH coding region (EF1A/hGH) was translationally repressed following rapamycin treatment in similar fashion to endogenous EF1A in human B lymphocytes. Mutation of two nucleotides in the TOP motif abolished the translational regulation. Gel mobility shift assays showed that both La protein from human B lymphocyte cytoplasmic extracts as well as purified recombinant La protein specifically bind to an in vitro-synthesized RNA containing the 5' UTR of EF1A mRNA. Moreover, extracts prepared from rapamycin-treated cells showed increased binding activity to the EF1A 5' UTR RNA, which correlates with TOP mRNA translational repression. In an in vitro translation system, recombinant La dramatically decreased the expression of EF1A/hGH construct mRNA, but not mRNAs lacking an intact TOP element. These results indicate that TOP mRNA translation may be modulated through La binding to the TOP element.
Collapse
Affiliation(s)
- J Zhu
- Department of Chemistry and Biochemistry, Brigham Young University, Provo, UT 84602, USA
| | | | | | | |
Collapse
|
18
|
Funahashi H, Imai T, Mase T, Sekiya M, Yokoi K, Hayashi H, Shibata A, Hayashi T, Nishikawa M, Suda N, Hibi Y, Mizuno Y, Tsukamura K, Hayakawa A, Tanuma S. Seaweed prevents breast cancer? Jpn J Cancer Res 2001; 92:483-7. [PMID: 11376555 PMCID: PMC5926746 DOI: 10.1111/j.1349-7006.2001.tb01119.x] [Citation(s) in RCA: 78] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022] Open
Abstract
To investigate the chemopreventive effects of seaweed on breast cancer, we have been studying the relationship between iodine and breast cancer. We found earlier that the seaweed, wakame, showed a suppressive effect on the proliferation of DMBA (dimethylbenz(a)anthracene)‐induced rat mammary tumors, possibly via apoptosis induction. In the present study, powdered mekabu was placed in distilled water, and left to stand for 24 h at 4°C. The filtered supernatant was used as mekabu solution. It showed an extremely strong suppressive effect on rat mammary carcinogenesis when used in daily drinking water, without toxicity. In vitro, mekabu solution strongly induced apoptosis in 3 kinds of human breast cancer cells. These effects were stronger than those of a chemothera‐peutic agent widely used to treat human breast cancer. Furthermore, no apoptosis induction was observed in normal human mammary cells. In Japan, mekabu is widely consumed as a safe, inexpensive food. Our results suggest that mekabu has potential for chemoprevention of human breast
Collapse
Affiliation(s)
- H Funahashi
- Department of Surgery II, Nagoya University School of Medicine, Showa-ku, Nagoya 466-8550, Japan.
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
19
|
Hayakawa A, Matsuda Y, Daibata M, Nakamura H, Sano K. Genomic organization, tissue expression, and cellular localization of AF3p21, a fusion partner of MLL in therapy-related leukemia. Genes Chromosomes Cancer 2001; 30:364-74. [PMID: 11241789 DOI: 10.1002/gcc.1102] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
We previously identified the AF3p21 gene, a novel fusion partner of the MLL gene, in a patient who had developed therapy-related leukemia with t(3;11)(p21;q23). The AF3p21 gene encodes a protein consisting of 722 amino acids, which has an SH3 (Src homology 3) domain, a proline-rich domain, and a bipartite nuclear localization signal. The protein's SH3 domain has high homology with that of FYN. Analysis of the DNA from the patient's leukemic cells revealed that intron 6 of the MLL gene was fused at a point upstream of exon 1 in the AF3p21 gene, and that the der(11) chromosome formed an MLL-AF3p21 fusion transcript in leukemic cells, whereas the der(3) chromosome did not form any fusion transcript. The AF3p21 gene on chromosome band 3p21 is 19 kb long and consists of 13 exons. The size of the mRNA of the AF3p21 gene is approximately 3.5 kb. The AF3p21 gene is widely expressed in normal human tissues including the bone marrow, brain, liver, thymus, lung, and skeletal muscle. Western blot and immunocytochemical analyses showed that AF3p21 protein has an apparent molecular weight of 80 kDa and is localized exclusively in the cell nucleus. These results suggest the possibility that AF3p21 protein plays a role in signal transduction in the nucleus.
Collapse
MESH Headings
- Adaptor Proteins, Signal Transducing
- Adult
- Amino Acid Sequence
- Bacterial Proteins
- Base Sequence
- Cell Cycle/genetics
- Chromosomes, Human, Pair 11/genetics
- Chromosomes, Human, Pair 3/genetics
- Fetus
- Gene Expression Regulation, Neoplastic/genetics
- HeLa Cells
- Humans
- In Situ Hybridization, Fluorescence
- Intermediate Filament Proteins/chemistry
- Leukemia, Monocytic, Acute/chemically induced
- Leukemia, Monocytic, Acute/etiology
- Leukemia, Monocytic, Acute/genetics
- Lymphoma
- Molecular Sequence Data
- Molecular Weight
- Muscle Proteins
- Myeloid-Lymphoid Leukemia Protein
- Nuclear Proteins/biosynthesis
- Nuclear Proteins/chemistry
- Nuclear Proteins/genetics
- Oncogene Proteins, Fusion/biosynthesis
- Oncogene Proteins, Fusion/genetics
- Organ Specificity/genetics
- Promoter Regions, Genetic/genetics
- Stomach Neoplasms
- Translocation, Genetic/genetics
- Tumor Cells, Cultured
Collapse
Affiliation(s)
- A Hayakawa
- Department of Pediatrics, Kobe University School of Medicine, Kobe, Japan
| | | | | | | | | |
Collapse
|
20
|
Hayakawa A. [Estrogen progestogen replacement therapy for hyperlipidemia in postmenopausal women]. Nihon Rinsho 2001; 59 Suppl 3:701-6. [PMID: 11347158] [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: 04/16/2023]
Affiliation(s)
- A Hayakawa
- Department of Metabolism, Tokyo Kyosai Hospital
| |
Collapse
|
21
|
Kakegawa T, Hayakawa A, Itaya N, Saito H, Kobayashi H. [Effect of rapamycin on cytoplasmic accumulation of hetero nuclear ribonucleoprotein C-like unwinding protein 2]. Jpn J Antibiot 2001; 54 Suppl A:93-5. [PMID: 11439909] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/20/2023]
|
22
|
Yokoyama I, Liu D, Kato T, Tokoro T, Kobayashi T, Hayashi S, Hayakawa A, Nakao A. Apoptosis of pig endothelial cells following hyperacute rejection. Transplant Proc 2001; 33:762. [PMID: 11267057 DOI: 10.1016/s0041-1345(00)02241-7] [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: 11/30/2022]
Affiliation(s)
- I Yokoyama
- Department of Surgery II, Nagoya University, School of Medicine, Nagoya, Japan
| | | | | | | | | | | | | | | |
Collapse
|
23
|
Wu J, Suzuki H, Zhou YW, Liu W, Yoshihara M, Kato M, Akhand AA, Hayakawa A, Takeuchi K, Hossain K, Kurosawa M, Nakashima I. Cepharanthine activates caspases and induces apoptosis in Jurkat and K562 human leukemia cell lines. J Cell Biochem 2001; 82:200-14. [PMID: 11527146 DOI: 10.1002/jcb.1155] [Citation(s) in RCA: 43] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Cepharanthine (CEP) is a known membrane stabilizer that has been widely used in Japan for the treatment of several disorders such as anticancer therapy-provoked leukopenia. We here report that apoptosis was induced by low concentrations (1-5 microM) of CEP in a human leukemia T cell line, Jurkat, and by slightly higher concentrations (5-10 microM) in a human chronic myelogenous leukemia (CML) cell line K562, which expresses a p210 antiapoptotic Bcr-Abl fusion protein. Induction of apoptosis was confirmed in both Jurkat and K562 cells by DNA fragmentation and typical apoptotic nuclear change, which were preceded by disruption of mitochondrial membrane potential and were induced through a Fas-independent pathway. CEP treatment induced activation of caspase-9 and -3 accompanied by cleavage of PARP, Bid, lamin B1, and DFF45/ICAD in both Jurkat and K562 cells, whereas caspase-8 activation and Akt cleavage were observed only in Jurkat cells. The CEP-induced apoptosis was completely blocked by zVAD-fmk, a broad caspase inhibitor. Interestingly, CEP treatment induced remarkable degradation of the Bcr-Abl protein in K562 cells, and this degradation was prevented partially by zVAD-fmk. When used in combination with a nontoxic concentration of herbimycin A, lower concentrations (2-5 microM) of CEP induced obvious apoptosis in K562 cells with rapid degradation or decrease in the amount of Bcr-Abl and Akt proteins. Our results suggest that CEP, which does not have bone marrow toxicity, may possess therapeutic potential against human leukemias, including CML, which is resistant to anticancer drugs and radiotherapy.
Collapse
Affiliation(s)
- J Wu
- Department of Immunology, Nagoya University Graduate School of Medicine, Japan
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
24
|
Hasegawa D, Sano K, Kosaka Y, Hayakawa A, Kawagoe R, Kawasaki K, Nakamura H. Acute megakaryoblastic leukemia in an infant with a novel t(1;9)(p32;q34). Cancer Genet Cytogenet 2000; 122:59-62. [PMID: 11104035 DOI: 10.1016/s0165-4608(00)00275-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
We report a case of a 14-month-old girl with acute megakaryoblastic leukemia (AMKL). May-Giemsa staining of the bone marrow cells revealed the proliferation of two distinct types of blasts. One type of blasts had cytoplasmic blebs, and the other showed a lymphoblastic morphology without blebs. Both types of blasts were negative for peroxidase and esterase reactions. Electron microscopic platelet peroxidase (PPO) reaction also revealed the presence of two types of blasts. One had irregular-shaped nuclei and positive PPO reaction in the nuclear envelope and rough endoplasmic reticulum but not in the Golgi apparatus. These types of blasts were considered to be megakaryoblasts. The other had an immature phenotype with round nuclei and positive PPO reaction in the nuclear envelope, rough endoplasmic reticulum, and the Golgi apparatus. The origin of this type of blasts could not be defined by their morphology. Surface marker analysis indicated that most of the leukemic cells expressed platelet markers, gpIIb, gpIIb/IIIa, gpIX, and gpIbalpha. Karyotypic analysis of the bone marrow cells of this unique subset of AMKL demonstrated a novel translocation, t(1;9)(p32;q34).
Collapse
Affiliation(s)
- D Hasegawa
- Department of Pediatrics, Kobe University School of Medicine, Japan
| | | | | | | | | | | | | |
Collapse
|
25
|
Muratake H, Hayakawa A, Natsume M. Preparation of benzene, furan, and thiophene analogs of duocarmycin SA employing a newly-devised phenol-forming reaction. Chem Pharm Bull (Tokyo) 2000; 48:1558-66. [PMID: 11045469 DOI: 10.1248/cpb.48.1558] [Citation(s) in RCA: 15] [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] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Five A-ring analogs of duocarmycin SA 9a-e were synthesized in racemic form modifying our second synthetic route toward duocarmycin SA. The problem encountered at the crucial phenol forming step to secure 17a, b from 16a, b under the conventionally used Kuwajima conditions was overcome by devising a more convenient method: simple heating of 16a-c in benzene in the presence of bis(triphenylphosphine)palladium(II) chloride (10 mol%), cesium carbonate (3 eq), and triphenylphosphine (0.3 eq) gave 17a-c in high yields of 86-91%. The intermediates 17a-e were readily led to the A-ring analogs (+/-)-9a-e almost according to the reported route.
Collapse
Affiliation(s)
- H Muratake
- Research Foundation Itsuu Laboratory, Tokyo, Japan
| | | | | |
Collapse
|
26
|
Hayakawa A, Kitamura N. Early endosomal localization of hrs requires a sequence within the proline- and glutamine-rich region but not the FYVE finger. J Biol Chem 2000; 275:29636-42. [PMID: 10889197 DOI: 10.1074/jbc.m002696200] [Citation(s) in RCA: 44] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Hrs is an early endosomal protein that is tyrosine-phosphorylated in cells stimulated with growth factors. Hrs is thought to play a regulatory role in endocytosis of growth factor-receptor complexes through early endosomes. Early endosomal localization of Hrs seems to be essential for Hrs to exert its function in the endocytosis. Hrs has a FYVE finger domain that binds specifically to phosphatidylinositol 3-phosphate in vitro. The FYVE finger is a likely domain that mediates membrane association of endosomal proteins. In this study, we examined whether the FYVE finger participates in early endosomal targeting of Hrs. Hrs with a zinc binding-defective FYVE finger was still localized to early endosomes. In addition, the N-terminal FYVE finger-containing fragment of Hrs showed a cytosolic distribution in mammalian cells. These results indicate that the FYVE finger is not required for the localization of Hrs to early endosomes. Furthermore, by analyzing a series of deletion mutants of Hrs, we identified a sequence of about 100 amino acids within the C-terminal proline- and glutamine-rich region as a domain essential for the targeting of Hrs to early endosomes.
Collapse
Affiliation(s)
- A Hayakawa
- Department of Life Science, Faculty of Bioscience and Biotechnology, Tokyo Institute of Technology, Nagatsuta, Midori-ku, Yokohama 226-8501, Japan
| | | |
Collapse
|
27
|
Liu W, Kato M, Akhand AA, Hayakawa A, Suzuki H, Miyata T, Kurokawa K, Hotta Y, Ishikawa N, Nakashima I. 4-hydroxynonenal induces a cellular redox status-related activation of the caspase cascade for apoptotic cell death. J Cell Sci 2000; 113 ( Pt 4):635-41. [PMID: 10652256 DOI: 10.1242/jcs.113.4.635] [Citation(s) in RCA: 150] [Impact Index Per Article: 6.3] [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: 12/24/2022] Open
Abstract
4-Hydroxynonenal (HNE), a diffusible product of lipid peroxidation, has been suggested to be a key mediator of oxidative stress-induced cell death. In this study, we partially characterized the mechanism of HNE-mediated cytotoxicity. Incubation of human T lymphoma Jurkat cells with 20–50 μM HNE led to cell death accompanied by DNA fragmentation. Western blot analysis showed that HNE-treatment induced time- and dose-dependent activation of caspase-8, caspase-9 and caspase-3. HNE-induced caspase-3 processing was confirmed by a flow cytometric demonstration of increased catalytic activity on the substrate peptide. HNE treatment also led to remarkable cleavage of poly(ADP-ribose) polymerase (PARP), which was prevented by pretreatment of cells with DEVD-FMK as a caspase-3 inhibitor. The HNE-mediated activation of caspases, cleavage of PARP and DNA fragmentation were blocked by antioxidants cysteine, N-acety-L-cysteine and dithiothreitol, but not by two other HNE-reactive amino acids lysine and histidine, or by cystine, the oxidized form of cysteine. HNE rapidly decreased levels of intracellular reduced glutathione (GSH) and its oxidized form GSSG, and these were also attenuated by the reductants. Coincubation of Jurkat cells with a blocking anti-Fas antibody prevented Fas-induced but not HNE-induced activation of caspase-3. HNE also activated caspase-3 in K562 cells that do not express functional Fas. Our results thereby demonstrate that HNE triggers oxidative stress-linked apoptotic cell death through activation of the caspase cascade. The results also suggest a possible mechanism involving a direct scavenge of intracellular GSH by HNE.
Collapse
Affiliation(s)
- W Liu
- Department of Immunology, Nagoya University School of Medicine, Showa-ku, Nagoya 466-8550, Japan
| | | | | | | | | | | | | | | | | | | |
Collapse
|
28
|
Affiliation(s)
- I Yokoyama
- Nagoya University, School of Medicine, Department of Surgery II, Japan
| | | | | | | | | | | | | |
Collapse
|
29
|
Abstract
An 81-year-old Japanese woman visited our hospital because of abdominal discomfort. Physical examination revealed that she had an abdominal mass. A combination of ultrasonography, computed tomography, magnetic resonance imaging (MRI), and hepatic asialoglycoprotein scintigraphy was utilized to make a diagnosis. We found that she had a downward elongated hepatic lobe or Riedel's lobe which did not appear to be common in our district. The prevalence of Riedel's lobe in the Asian population has not been studied. Furthermore, this is the first report that describes the MRI and hepatic asialoglycoprotein scintigraphy features of Riedel's lobe of the liver.
Collapse
Affiliation(s)
- K Yano
- Department of Gastroenterology, Japanese Red Cross, Nagasaki Genbaku Hospital
| | | | | | | | | | | | | | | |
Collapse
|
30
|
Sano K, Hayakawa A, Piao JH, Kosaka Y, Nakamura H. Novel SH3 protein encoded by the AF3p21 gene is fused to the mixed lineage leukemia protein in a therapy-related leukemia with t(3;11) (p21;q23). Blood 2000; 95:1066-8. [PMID: 10648423] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/15/2023] Open
Abstract
The mixed lineage leukemia (MLL) gene located at chromosome band 11q23 is frequently rearranged in patients with therapy-related acute monocytic leukemia who received topoisomerase II inhibitors. We have identified a novel fusion partner of MLL (FAB M5b) in a patient who developed t-AML 9 years after treatment for acute lymphoblastic leukemia (ALL). The leukemic cells had a sole karyotypic abnormality of t(3;11) (p21;q23). Screening of a genomic DNA library, prepared from leukemic cell DNA, identified rearranged clones composed of MLL and a novel gene on chromosome 3p21 (AF3p21). The AF3p21 gene encodes a protein of 722 amino acids, which contains an Src homology 3 (SH3) domain, a proline-rich domain, and a bipartite nuclear localizing signal (NLS). RNA analysis demonstrated that exon 6 of the MLL gene fused to exon 2 of the AF3p21 gene. The resulting chimeric protein consists of AT-hooks, methyltransferase, and transcription repressor domains of MLL in addition to the AF3p21 proline-rich domain and NLS but not the AF3p21 SH3 domain.
Collapse
MESH Headings
- Adaptor Proteins, Signal Transducing
- Adolescent
- Amino Acid Sequence
- Antineoplastic Combined Chemotherapy Protocols/adverse effects
- Antineoplastic Combined Chemotherapy Protocols/therapeutic use
- Base Sequence
- Bone Marrow Transplantation
- Combined Modality Therapy
- Cyclophosphamide/administration & dosage
- Cyclophosphamide/adverse effects
- DNA, Complementary/genetics
- Daunorubicin/administration & dosage
- Daunorubicin/adverse effects
- Etoposide/administration & dosage
- Etoposide/adverse effects
- Female
- Humans
- Leukemia, Monocytic, Acute/chemically induced
- Leukemia, Monocytic, Acute/drug therapy
- Leukemia, Monocytic, Acute/genetics
- Leukemia, Monocytic, Acute/therapy
- Leukemia-Lymphoma, Adult T-Cell/drug therapy
- Molecular Sequence Data
- Muscle Proteins
- Myeloid-Lymphoid Leukemia Protein
- Neoplasms, Second Primary/chemically induced
- Neoplasms, Second Primary/drug therapy
- Neoplasms, Second Primary/genetics
- Neoplasms, Second Primary/therapy
- Nitrosourea Compounds/administration & dosage
- Nitrosourea Compounds/adverse effects
- Nuclear Proteins/genetics
- Oncogene Proteins, Fusion/genetics
- Sequence Alignment
- Sequence Homology, Nucleic Acid
- src Homology Domains/genetics
Collapse
Affiliation(s)
- K Sano
- Department of Pediatrics, Kobe University School of Medicine, Kobe, Japan.
| | | | | | | | | |
Collapse
|
31
|
Hayakawa A, Kojima T, Yokoyama I, Suzuki H, Tajiri H, Nakashima I. A short peptide derived from the antisense homology box of Fas ligand induces apoptosis in anti-Fas antibody-insensitive human ovarian cancer cells. Apoptosis 2000; 5:37-41. [PMID: 11227489 DOI: 10.1023/a:1009633525205] [Citation(s) in RCA: 5] [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: 11/12/2022]
Abstract
We found that a short synthetic peptide corresponding to the "antisense homology box" of Fas ligand induced apoptotic cell death of Fas-expressing human ovarian cancer cell lines. The peptide was deduced from residues 256-265 of human Fas ligand, based on the hypothesis that it should contain a specific binding site to the corresponding Fas. Interestingly, the ovarian cancer cell line NOS4, which was sensitive to anti-Fas antibody induced apoptosis, was not affected by the peptide, whereas another cell line, SKOV-3, which was insensitive to anti-Fas antibody, was killed by the peptide. Thus, this short peptide was shown to have a unique activity to induce apoptosis in human ovarian cancer cells in a manner different from anti-Fas antibody.
Collapse
Affiliation(s)
- A Hayakawa
- Department of Equipment for Research and Education, Nagoya University, School of Medicine, Japan
| | | | | | | | | | | |
Collapse
|
32
|
Sakakibara H, Hayakawa A, Deji A, Gawronski SW, Sugiyama T. His-Asp phosphotransfer possibly involved in the nitrogen signal transduction mediated by cytokinin in maize: molecular cloning of cDNAs for two-component regulatory factors and demonstration of phosphotransfer activity in vitro. Plant Mol Biol 1999; 41:563-73. [PMID: 10608665 DOI: 10.1023/a:1006391304881] [Citation(s) in RCA: 42] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
Implication of His-to-Asp and/or Asp-to-His (His-Asp) phosphorelay has been recently reported in signal transduction pathways initiated by ethylene and cytokinin. These signaling systems are generally composed of sensor His-protein kinases, His-containing phosphotransfer (HPt) domains, and response regulator domains. In this study, we isolated maize cDNAs, designated as ZmRR2 and ZmHP2, which encode a response regulator domain and HPt domain, respectively, and we identified their His-to-Asp phosphotransfer activity in vitro. The putative translated product of ZmRR2 was highly similar to that of ZmRR1 (78% identity), a maize response regulator homologue. The putative translated product of ZmHP2 showed similarity to that of HPt domains from Arabidopsis thaliana (AHP1-AHP3: 44 to 47% identity) and Saccharomyces cerevisiae (Ypdlp: 24% identity). In vitro experiments demonstrated that the putative signaling factors can transfer the phosphoryl group from His-80 of ZmHP2 to Asp-90 of ZmRRs. Treating detached leaves with t-zeatin or supplying inorganic nitrogen to the whole plant induced the accumulation of ZmRR1 and ZmRR2 transcripts. On the other hand, the steady-state transcript level of ZmHP2 was not affected by cytokinin or inorganic nitrogen sources. These results indicate that His-Asp phosphotransfer may be involved in the transduction of nitrogen signals mediated by cytokinin, and that multiple response regulators participate in the signaling pathways.
Collapse
MESH Headings
- Amino Acid Sequence
- Aspartic Acid/metabolism
- Binding Sites
- Blotting, Northern
- Cloning, Molecular
- Cytokinins/pharmacology
- DNA, Complementary/chemistry
- DNA, Complementary/genetics
- Gene Expression Regulation, Plant/drug effects
- Histidine/metabolism
- Molecular Sequence Data
- Nitrogen/metabolism
- Phosphorylation/drug effects
- Plant Leaves/drug effects
- Plant Leaves/genetics
- Plant Proteins/chemistry
- Plant Proteins/genetics
- Plant Proteins/metabolism
- Protein Structure, Tertiary
- RNA, Plant/genetics
- RNA, Plant/metabolism
- Sequence Alignment
- Sequence Analysis, DNA
- Sequence Homology, Amino Acid
- Signal Transduction/drug effects
- Tissue Distribution
- Zea mays/chemistry
- Zea mays/genetics
- Zeatin/pharmacology
Collapse
Affiliation(s)
- H Sakakibara
- Department of Biological Mechanisms and Functions, Graduate School of Bioagricultural Sciences, Nagoya University, Chikusa, Japan
| | | | | | | | | |
Collapse
|
33
|
Hasegawa D, Sano K, Kosaka Y, Hayakawa A, Nakamura H. A case of hemophagocytic lymphohistiocytosis with prolonged remission after syngeneic bone marrow transplantation. Bone Marrow Transplant 1999; 24:425-7. [PMID: 10467334 DOI: 10.1038/sj.bmt.1701917] [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: 11/08/2022]
Abstract
We report a 7-year-old girl with hemophagocytic lymphohistiocytosis who received a syngeneic bone marrow transplant from her twin sister. She presented with high fever and cough. Laboratory findings revealed pancytopenia, elevation of liver enzymes, and hyperferritinemia. Bone marrow examination revealed histiocytic hemophagocytes and lymphoblastoid cells. Southern blot analysis of the bone marrow cells revealed a monoclonal proliferation of EBV-infected lymphocytes. Although she underwent combined chemotherapy according to the HLH-94 protocol, she developed severe pancytopenia. Following myeloablative conditioning with busulfan (16 mg/kg), cyclophosphamide (120 mg/kg), and etoposide (1.5 g/m2), she was transplanted with 6.6 x 10(8)/kg mononuclear cells from the twin sister. She remains in complete remission 23 months after transplantation.
Collapse
Affiliation(s)
- D Hasegawa
- Department of Pediatrics, Kobe University School of Medicine, Kobe, Japan
| | | | | | | | | |
Collapse
|
34
|
Hasegawa D, Sano K, Kosaka Y, Hayakawa A, Kawagoe R, Amo K, Taya K, Hirabayashi N, Nakamura H. [Infantile T cell acute lymphoblastic leukemia complicated by thrombotic microangiopathy and human herpes virus 6 infection after allogeneic peripheral blood stem cell transplantation using CD34-positive cells]. Rinsho Ketsueki 1999; 40:574-80. [PMID: 10483141] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/13/2023]
Abstract
We report on a 19-month-old boy with refractory T-cell acute lymphoblastic leukemia who underwent allogeneic peripheral blood stem cell transplantation using positively selected CD34 cells from his HLA two-loci mismatched mother. The conditioning regimen consisted of busulfan (140 mg/m2/d for 2 days), total body irradiation (12 Gy) and melphalan (210 mg/m2). The patient received cyclosporin A for graft-versus-host disease (GVHD) prophylaxis. The CD34-positive cells were separated using an immunomagnetic cell-separation system (Isolex 50). The number of infused CD34-positive cells was 4.4 x 10(6)/kg. Successful engraftment was confirmed on day 14 by fluorescent in situ hybridization of X chromosomes. The patient experienced severe diarrhea due to thrombotic microangiopathy (TMA) following acute GVHD, and died on day 71 of human herpes virus type 6 pneumonitis. Stem cell transplantation using CD34 positively selected cells from HLA-mismatched related donors may be a useful treatment with low incidence of severe GVHD, but many problems remain to be overcome, including severe viral infections and TMA.
Collapse
Affiliation(s)
- D Hasegawa
- Department of Pediatrics, Kobe University School of Medicine
| | | | | | | | | | | | | | | | | |
Collapse
|
35
|
Hayakawa A, Sano K, Hasegawa D, Kosaka Y, Nakamura H, Ideguchi H, Harano T. [Hereditary hemoglobin H disease in Japanese siblings diagnosed by human parvovirus B19 infection]. Rinsho Ketsueki 1999; 40:536-41. [PMID: 10483135] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/13/2023]
Abstract
Hereditary hemoglobin H (HbH) disease was diagnosed in 2 Japanese sisters who presented with aplastic crisis following acute human parvovirus B19 (HPV B19) infection. The proband, an 8-year-old girl, developed persistent fever and pallor, and samples of her peripheral blood showed hypochromic microcytic anemia. Other laboratory data were consistent with hemolytic anemia. Fever and signs of hypochromic microcytic anemia also developed in her sister 9 days later. Cation exchange HPLC analysis of their hemoglobin revealed abnormal hemoglobin migrating faster than HbF, a finding consistent with HbH. Although they presented neither arthralgia nor skin rash, we concluded that their aplastic crisis was induced by HPV B19, because HPV B19 DNA was detected in samples of their peripheral blood by PCR analysis, and HPV B19 IgM and IgG antibody titers were elevated. A genetic analysis of the alpha-globin gene in both sisters and their parents disclosed that the father was heterozygous for alpha-Thal-2, the mother, heterozygous for alpha-Thal-1, and the proband and her sister, double heterozygous for alpha-Thal-1 and alpha-Thal-2. alpha-Thal-2 is a 3.7 kb-deletion allele.
Collapse
Affiliation(s)
- A Hayakawa
- Department of Pediatrics, Faculty of Medicine, University of Kobe
| | | | | | | | | | | | | |
Collapse
|
36
|
Hayakawa A, Yokoyama I, Tajiri H, Okamoto T, Nakashima I. Protein kinase C-dependent anti-apoptotic mechanism that is associated with high sensitivity to anti-Fas antibody in ovarian cancer cell lines. Cancer Lett 1999; 140:113-9. [PMID: 10403549 DOI: 10.1016/s0304-3835(99)00062-2] [Citation(s) in RCA: 10] [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: 10/18/2022]
Abstract
We compared the sensitivities to apoptosis via anti-Fas antibody of two human ovarian cancer cell lines, NOS4 and SKOV-3, both of which strongly express the Fas antigen on their cell surface. Treatment with anti-Fas antibody induced extensive DNA fragmentation in NOS4 cells but none in SKOV-3 cells. However; both cell lines underwent apoptosis in response to calcium ionophore A23187 or sphingomyelinase, demonstrating that the latter cell line is capable of DNA fragmentation. DNA fragmentation was not induced in either cell line by treatment with PKC activator PMA, however treatment with protein kinase C (PKC) inhibitor H-7 induced extensive DNA fragmentation in NOS4 cells, but again none in SKOV-3 cells. Protein kinase A inhibitor HA1004 treatment did not induce DNA fragmentation in either cell line. Correspondingly, treatment of cells with PMA before anti-Fas antibody or A23187 treatment partially inhibited induction of DNA fragmentation in NOS4 cells but not in SKOV-3 cells. Both NOS4 and SKOV-3 cell lines expressed isozymes of PKC at comparable levels. These results suggest the presence of a PKC-dependent anti-apoptotic mechanism in association with high sensitivity to anti-Fas antibody in these ovarian cancer cell lines.
Collapse
Affiliation(s)
- A Hayakawa
- Equipment Center for Research and Education, Nagoya University School of Medicine, Japan
| | | | | | | | | |
Collapse
|
37
|
Fukuda M, Oka M, Itoh N, Sakamoto T, Mori H, Hayakawa A, Kohno S. Vasospastic angina likely related to cisplatin-containing chemotherapy and thoracic irradiation for lung cancer. Intern Med 1999; 38:436-8. [PMID: 10397083 DOI: 10.2169/internalmedicine.38.436] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Vasospastic angina is rarely observed during cancer treatment. The present report describes two males with lung cancer, aged 73 and 61, who developed vasospastic angina during combination treatment of cisplatin-containing chemotherapy and thoracic irradiation. As both patients have smoked and their ages are typical for patients with coronary artery disease, such events may be incidental. However, oncologists should be aware of the possible development of myocardial ischemia during or following administration of antineoplastic agents, especially in elderly patients with pre-existing coronary risk factors or a history of thoracic radiotherapy.
Collapse
Affiliation(s)
- M Fukuda
- Department of Internal Medicine, Japanese Red Cross Nagasaki Atomic Bomb Hospital
| | | | | | | | | | | | | |
Collapse
|
38
|
Yokoyama I, Negita M, Hayakawa A, Hayashi S, Kobayashi T, Namii Y, Nagasaka T, Takagi H. Cytosolic calcium dynamics and free radical-induced apoptosis of the endothelial cells. Transplant Proc 1999; 31:808-9. [PMID: 10083349 DOI: 10.1016/s0041-1345(98)01780-1] [Citation(s) in RCA: 3] [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: 11/25/2022]
Affiliation(s)
- I Yokoyama
- Department of Surgery II, Nagoya University, School of Medicine, Japan.
| | | | | | | | | | | | | | | |
Collapse
|
39
|
Sakamoto J, Hayakawa A, Uehara T, Noguchi S, Sone N. Cloning of Bacillus stearothermophilus ctaA and heme A synthesis with the CtaA protein produced in Escherichia coli. Biosci Biotechnol Biochem 1999; 63:96-103. [PMID: 10052128 DOI: 10.1271/bbb.63.96] [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] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The Bacillus stearothermophilus ctaA gene, which is required for heme A synthesis, was found upstream of the ctaBCDEF/caaEABCD gene cluster as in B. subtilis and B. firmus. The deduced protein sequence indicate that CtaA is a 35-kDa intrinsic membrane protein with seven hydrophobic segments. Alignment of CtaA sequences showed conserved residues including histidines that may be involved in heme B binding and substrate binding. Expression of ctaA in E. coli resulted in increased formation of a membrane-bound b-type cytochrome, heme A production, and severe growth inhibition. Furthermore, B. stearothermophilus CtaA produced in E. coli was found to catalyze the conversion of heme O to heme A in vitro.
Collapse
Affiliation(s)
- J Sakamoto
- Department of Biochemical Engineering and Science, Kyushu Institute of Technology, Fukuoka, Japan.
| | | | | | | | | |
Collapse
|
40
|
Yokoyama I, Hayakawa A, Hayashi S, Kobayashi T, Negita T, Namii Y, Nagasaka T, Koike C, Tachi Y, Takagi H. Immunosuppressant effect on Fas antigen expression and p53 of an experimental tumor. Transplant Proc 1998; 30:4196. [PMID: 9865346 DOI: 10.1016/s0041-1345(98)01391-8] [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: 11/21/2022]
Affiliation(s)
- I Yokoyama
- Nagoya University School of Medicine, Department of Surgery II, Japan
| | | | | | | | | | | | | | | | | | | |
Collapse
|
41
|
Kato M, Liu W, Yi H, Asai N, Hayakawa A, Kozaki K, Takahashi M, Nakashima I. The herbal medicine Sho-saiko-to inhibits growth and metastasis of malignant melanoma primarily developed in ret-transgenic mice. J Invest Dermatol 1998; 111:640-4. [PMID: 9764846 DOI: 10.1046/j.1523-1747.1998.00341.x] [Citation(s) in RCA: 51] [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: 11/20/2022]
Abstract
Sho-saiko-to is the most popular herbal medicine in Japan. We investigated the anti-tumor and anti-metastatic effects of Sho-saiko-to and its chemically defined ingredients on the primary skin melanoma that developed in a metallothionein-I (MT)/ret transgenic mouse line and on a melanoma cell line (Mel-ret), which was derived from a primary tumor developed in a MT/ret transgenic mouse. In vitro, Sho-saiko-to suppressed the growth of Mel-ret cells more strongly than any single ingredient of Sho-saiko-to, although baicalin as one of several ingredients tested also suppressed it significantly. In vivo, Sho-saiko-to (i) significantly (p < 0.02) prolonged the onset of tumor development (1.5 mo), (ii) definitely retarded the transition to malignancy, (iii) significantly decreased the incidence of distant metastasis to brain (p < 0.002), kidney (p < 0.05), and liver (p < 0.05) at the malignant stage, and (iv) significantly (p < 0.02) prolonged life span (2.6 mo). Moreover, Sho-saiko-to and baicalin down-regulated the matrix metalloproteinase-2 and -9 expression levels, and upregulated their inhibitor expression level in both the primary tumors and Mel-ret cells. In conclusion, Sho-saiko-to displayed anti-tumor and anti-metastatic effects on melanoma with regulation of the balance of matrix metalloproteinase and tissue inhibitor of the matrix metalloproteinase levels.
Collapse
Affiliation(s)
- M Kato
- Department of Immunology, Nagoya University School of Medicine, Aichi, Japan
| | | | | | | | | | | | | | | |
Collapse
|
42
|
Tajiri H, Hayakawa A, Matsumoto Y, Yokoyama I, Yoshida S. Changes in intracellular Ca2+ concentrations related to PDT-induced apoptosis in photosensitized human cancer cells. Cancer Lett 1998; 128:205-10. [PMID: 9683284 DOI: 10.1016/s0304-3835(98)00066-4] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
For photodynamic therapy (PDT), human squamous cell carcinoma cells (HSC-2) were treated with 3 microg/ml of photofrin 24 h prior to irradiating the cultures with the excimer dye laser at a dose of 2 J/cm2. Extensive DNA fragmentation was recognized within 2 h of PDT. The proportion of cells with DNA fragmentation on flow cytometric analysis was significantly increased to 44 and 78% at 1 and 2 h after PDT, respectively, compared to control groups. Confocal laser scanning microscopy revealed a slight change in the intracellular Ca2+ concentration occurring at 30 min after PDT and a subsequent marked increase in the Ca2+ concentration 1-2 h after PDT, but no change was observed in the cells exposed to laser irradiation alone and to photofrin alone and in the cells immediately after PDT. These findings suggest that an increase in the intracellular Ca2+ concentration may play an important role in the induction of PDT-induced apoptosis.
Collapse
Affiliation(s)
- H Tajiri
- Department of Internal Medicine, National Cancer Center Hospital East, Kashiwa, Chiba, Japan.
| | | | | | | | | |
Collapse
|
43
|
Liu W, Kato M, Akhand AA, Hayakawa A, Takemura M, Yoshida S, Suzuki H, Nakashima I. The herbal medicine sho-saiko-to inhibits the growth of malignant melanoma cells by upregulating Fas-mediated apoptosis and arresting cell cycle through downregulation of cyclin dependent kinases. Int J Oncol 1998; 12:1321-6. [PMID: 9592193 DOI: 10.3892/ijo.12.6.1321] [Citation(s) in RCA: 10] [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: 02/07/2023] Open
Abstract
The anti-tumor effect and its mechanism of the herbal medicine sho-saiko-to were investigated on a murine malignant melanoma cell line (Mel-ret). Sho-saiko-to induced apoptotic cell death of Mel-ret cells with a definite increase of cell surface Fas antigen and Fas ligand (FasL). Sho-saiko-to arrested Mel-ret cells in G1 phase by decreasing the expression of cyclin-dependent kinase (cdk) 4 and its homologue cdk6. Kinase activities of cdk4 and cdk6 were identified to be downregulated by sho-saiko-to. Ingredient analysis revealed that baicalin is likely the main active constituent in the upregulation of Fas antigen and Fas ligand, while glycyrrhizin is the main constituent in the inhibition of cdks.
Collapse
Affiliation(s)
- W Liu
- Department of Immunology, Nagoya University School of Medicine, Nagoya 466-8550, Japan
| | | | | | | | | | | | | | | |
Collapse
|
44
|
Wan ZG, Kobayashi H, Hayakawa A, Ishigaki T. A diffusible resistance factor(s) in spontaneous mitomycin resistant mammalian cancer cells. Nagoya J Med Sci 1998; 61:37-45. [PMID: 9664765] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
We developed a Mitomycin C (MMC)-resistant mouse breast cancer cell subline, R-FM3A, from FM3A parent cells(W-FM3A) by continuous exposure to a concentration of 0.01 microgram/ml MMC for over two months. R-FM3A cells were resistant to MMC and decreased in response to the combined effects of ionizing irradiation and MMC. The resistance to MMC and ionizing irradiation was mediated by a cell-free medium, in which R-FM3A cells were cultured for 12 hours without MMC (Re-medium). The cell cycles measured by means of a flow cytometer were not influenced by the Re-medium when W-FM3A cells were treated by MMC. But the cell cycles measured by means of a flow cytometer were influenced by the Re-medium when W-FM3A cells were irradiated at a dose of 4 Gy.
Collapse
Affiliation(s)
- Z G Wan
- Department of Radiology, Nagoya University School of Medicine, Japan
| | | | | | | |
Collapse
|
45
|
Hasegawa D, Kojima S, Tatsumi E, Hayakawa A, Kosaka Y, Nakamura H, Sako M, Osugi Y, Nagata S, Sano K. Elevation of the serum Fas ligand in patients with hemophagocytic syndrome and Diamond-Blackfan anemia. Blood 1998; 91:2793-9. [PMID: 9531589] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Fas ligand (FasL) is a membrane protein that is expressed in activated T cells and natural killer cells. FasL binds to Fas on target cells and induces apoptosis. There exists a soluble form of FasL (sFasL), and sFasL also induces apoptosis of Fas-bearing cells. The serum sFasL concentrations were reported to be elevated in patients with large granular lymphocytic leukemia and natural killer cell lymphoma. In this study, we have measured serum sFasL concentrations in other hematological disorders, including severe aplastic anemia (SAA), hemophagocytic lymphohistiocytosis (HLH), and Diamond-Blackfan anemia (DBA). The serum sFasL concentration of age-matched healthy controls was 0.16 +/- 0.11 ng/mL (mean +/- SD, n = 22). The serum sFasL levels in the patients with HLH and DBA were 3.75 +/- 3.82 (n = 19; P < .0001, HLH v control) and 2.76 +/- 2.43 ng/mL (n = 6; P = .012, DBA v control), respectively. Serum interferon-gamma concentration was elevated in the patients with HLH (1.61 +/- 2.62 ng/mL) but not in those with DBA (below the detectable level). These results suggest that the Fas-FasL system plays a role, at least in part, in the pathophysiology of HLH and DBA.
Collapse
Affiliation(s)
- D Hasegawa
- Department of Pediatrics, Kobe University School of Medicine, Kobe, Japan
| | | | | | | | | | | | | | | | | | | |
Collapse
|
46
|
Itoh S, Ichida T, Yoshida T, Hayakawa A, Uchida M, Tashiro-Itoh T, Matsuda Y, Ishihara K, Asakura H. Autoantibodies against a 210 kDa glycoprotein of the nuclear pore complex as a prognostic marker in patients with primary biliary cirrhosis. J Gastroenterol Hepatol 1998; 13:257-65. [PMID: 9570238 DOI: 10.1111/j.1440-1746.1998.01553.x] [Citation(s) in RCA: 91] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
It has been reported that the presence of anti-nuclear antibody against a 210 kDa glycoprotein of nuclear pore complex (anti-gp210) is highly specific for primary biliary cirrhosis (PBC). The aim of the present study was to investigate the significance of anti-gp210, especially as a prognostic marker. The presence of anti-gp210 was ascertained in 113 patients with PBC and 162 controls by indirect immunofluorescence assay using HepG2 cells and immunoblotting analysis using nuclear extracts from HeLa cells. Anti-gp210 was detected in 25 of the 113 (22.1%) patients. None of the 162 controls was positive for anti-gp210. The appearance and titre of anti-gp210 in the patients with PBC did not vary from the time of diagnosis and through their clinical course. Anti-mitochondrial antibodies (AMA), including antibodies against pyruvate dehydrogenase complex, branched chain alpha-ketoacid dehydrogenase complex and alpha-ketoglutarate dehydrogenase complex, were not detected by enzyme-linked immunosorbent assay in five of the 113 (4.4%) patients with PBC. However, anti-gp210 alone was positive in one of these five patients. The difference in prognosis was statistically significant; patients with PBC positive for anti-gp210 died from hepatic failure more frequently than those who were negative (P < 0.01), although there were no statistically significant differences in the frequency of jaundice and the histological stage at the time of diagnosis between the two groups. We suggest that the presence of anti-gp210 is one of the independent prognostic markers able to predict, at the time of diagnosis, a poor outcome in patients with PBC.
Collapse
Affiliation(s)
- S Itoh
- Third Department of Internal Medicine, Niigata University School of Medicine, Niigata City, Japan
| | | | | | | | | | | | | | | | | |
Collapse
|
47
|
Tachi Y, Kobayashi T, Yokoyama I, Hayashi S, Negita M, Namii Y, Katayama A, Nagasaka T, Mei GL, Hayakawa A, Matsuda H, Muramatsu T, Takagi H. Variability of cytotoxicity to pig cultured cells and its determinant factor in human sera. Transplant Proc 1998; 30:71-3. [PMID: 9474960 DOI: 10.1016/s0041-1345(97)01182-2] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Y Tachi
- Department of Surgery II, Nagoya University School of Medicine, Japan
| | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
48
|
Takada T, Kinkori T, Muramatsu H, Hayakawa A, Torii S, Muramatsu T. Midkine, a retinoic acid-inducible heparin-binding cytokine, is a novel regulator of intracellular calcium in human neutrophils. Biochem Biophys Res Commun 1997; 241:756-61. [PMID: 9434781 DOI: 10.1006/bbrc.1997.7873] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Midkine (MK), which induces chemotaxis of human neutrophils, was found to trigger mobilization of intracellular calcium of these cells. The maximum response was observed 150 sec after exposure to MK, suggesting a complex mechanism in the process. The calcium mobilization was inhibited by herbimycin A, Bordetella pertussis toxin and wortmannin, suggesting that a tyrosine kinase, a G protein-linked receptor and phosphatidyl inositol 3 kinase are involved in the process.
Collapse
Affiliation(s)
- T Takada
- Department of Biochemistry, Nagoya University School of Medicine, Japan
| | | | | | | | | | | |
Collapse
|
49
|
Yokoyama I, Hayashi S, Kobayashi T, Negita M, Namii Y, Katayama A, Nagasaka T, Koike C, Tachi Y, Hayakawa A, Tajiri H, Takagi H. Hepatocyte apoptosis and cytosolic calcium dynamics in ischemic injury. Transplant Proc 1997; 29:3514. [PMID: 9414816 DOI: 10.1016/s0041-1345(97)01001-4] [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: 02/05/2023]
Affiliation(s)
- I Yokoyama
- Department of Surgery II, School of Medicine, Nagoya University, Japan
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
50
|
Abstract
Active cell death induced by ligation of the Fas antigen (Fas-Ag) with its antibody, Fas ligand (Fas-L), has been known to play a major role in cell killing via apoptosis by cytotoxic T lymphocytes (CTL). Thus, in liver transplantation, Fas-Ag expression of hepatocytes and its modification by immunosuppressive agents such as FK 506 or CsA can theoretically influence allograft survival. Mouse hepatocytes (BALB/c) were isolated and cultured with or without FK 506 or CsA, and Fas-Ag expression was determined by flow cytometry. Fas-Ag expression in the control was 17.2 +/- 2.5% after 24 hr of culture. When FK 506 or CsA was added, Fas-Ag expression with FK 506 at a concentration of 0.01-0.1 microg/ml was significantly lower than that with CsA (P < 0.05). When the cells were incubated with apoptosis-inducing anti-Fas-Ag monoclonal antibody, agarose gel electrophoresis of the control cells yielded a typical pattern of DNA fragmentations. The cells with FK 506 at 0.01 microg/ml yielded the least DNA fragmentation. These findings suggested that in the in vivo setting, the hepatocytes of the allograft would have a lower chance of being attacked by CTL in the host treated with FK 506.
Collapse
Affiliation(s)
- I Yokoyama
- Department of Surgery II and Equipment Center for Research and Education, Nagoya University, School of Medicine, Japan
| | | | | | | | | | | |
Collapse
|