51
|
Katoh N, Soda I, Tamamura H, Takahashi S, Inoue T, Onimaru R, Shibuya K, Hayakawa K, Shirato H. A Retrospective Multicenter Study of Stereotactic Body Radiation Therapy Using a Real-Time Tumor-Tracking Radiation Therapy System for Stage I Non-Small Cell Lung Cancer. Int J Radiat Oncol Biol Phys 2013. [DOI: 10.1016/j.ijrobp.2013.06.1340] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
52
|
Sekiguchi A, Ishiyama H, Satoh T, Kawakami S, Komori S, Soda I, Tabata K, Takahashi R, Iwamura M, Hayakawa K. Eight-Year Experience of Iodine-125 Monotherapy for Japanese Men With Localized Prostate Cancer. Int J Radiat Oncol Biol Phys 2013. [DOI: 10.1016/j.ijrobp.2013.06.925] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
53
|
Yogo K, Hayakawa K, Kunieda E. Verification of a Commercial Monte Carlo Electron Dose-Calculation Algorithm Under Clinical Use for Treatment of Breast and Total Scalp Irradiation. Int J Radiat Oncol Biol Phys 2013. [DOI: 10.1016/j.ijrobp.2013.06.1534] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
54
|
Kadariya Y, Tang B, Wang L, Al-Saleem T, Hayakawa K, Slifker MJ, Kruger WD. Germline Mutations in Mtap Cooperate with Myc to Accelerate Tumorigenesis in Mice. PLoS One 2013; 8:e67635. [PMID: 23840755 PMCID: PMC3694069 DOI: 10.1371/journal.pone.0067635] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2013] [Accepted: 05/20/2013] [Indexed: 11/19/2022] Open
Abstract
Objective The gene encoding the methionine salvage pathway methylthioadenosine phosphorylase (MTAP) is a tumor suppressor gene that is frequently inactivated in a wide variety of human cancers. In this study, we have examined if heterozygosity for a null mutation in Mtap (MtaplacZ) could accelerate tumorigenesis development in two different mouse cancer models, Eμ-myc transgenic and Pten+/−. Methods Mtap Eμ-myc and Mtap Pten mice were generated and tumor-free survival was monitored over time. Tumors were also examined for a variety of histological and protein markers. In addition, microarray analysis was performed on the livers of MtaplacZ/+ and Mtap+/+ mice. Results Survival in both models was significantly decreased in MtaplacZ/+ compared to Mtap+/+ mice. In Eµ-myc mice, Mtap mutations accelerated the formation of lymphomas from cells in the early pre-B stage, and these tumors tended to be of higher grade and have higher expression levels of ornithine decarboxylase compared to those observed in control Eµ-myc Mtap+/+ mice. Surprisingly, examination of Mtap status in lymphomas in Eµ-myc MtaplacZ/+ and Eµ-myc Mtap+/+ animals did not reveal significant differences in the frequency of loss of Mtap protein expression, despite having shorter latency times, suggesting that haploinsufficiency of Mtap may be playing a direct role in accelerating tumorigenesis. Consistent with this idea, microarray analysis on liver tissue from age and sex matched Mtap+/+ and MtaplacZ/+ animals found 363 transcripts whose expression changed at least 1.5-fold (P<0.01). Functional categorization of these genes reveals enrichments in several pathways involved in growth control and cancer. Conclusion Our findings show that germline inactivation of a single Mtap allele alters gene expression and enhances lymphomagenesis in Eµ-myc mice.
Collapse
|
55
|
Uemura H, Hayakawa K, Hamada Y, Yamamoto K, Kutsuna S, Ujiie M, Takeshita N, Kato Y, Kanagawa S, Shimada K, Kirikae T, Ohmagari N. P324 Parvimonas micra as a causative organism of spondylodiscitis: A report of 3 cases. Int J Antimicrob Agents 2013. [DOI: 10.1016/s0924-8579(13)70565-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
56
|
Kishida T, Cui FD, Ohgitani E, Gao F, Hayakawa K, Mazda O. High pressure treatment under subfreezing temperature results in drastic inactivation of enveloped and non-enveloped viruses. Biotechnol Lett 2013; 35:1297-301. [DOI: 10.1007/s10529-013-1204-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2013] [Accepted: 03/28/2013] [Indexed: 11/24/2022]
|
57
|
Tanizaki R, Ujiie M, Kato Y, Iwagami M, Hashimoto A, Kutsuna S, Takeshita N, Hayakawa K, Kanagawa S, Kano S, Ohmagari N. First case of Plasmodium knowlesi infection in a Japanese traveller returning from Malaysia. Malar J 2013; 12:128. [PMID: 23587117 PMCID: PMC3637542 DOI: 10.1186/1475-2875-12-128] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2013] [Accepted: 04/08/2013] [Indexed: 11/10/2022] Open
Abstract
This is the first case of Plasmodium knowlesi infection in a Japanese traveller returning from Malaysia. In September 2012, a previously healthy 35-year-old Japanese man presented to National Center for Global Health and Medicine in Tokyo with a two-day history of daily fever, mild headaches and mild arthralgia. Malaria parasites were found in the Giemsa-stained thin blood smear, which showed band forms similar to Plasmodium malariae. Although a nested PCR showed the amplification of the primer of Plasmodium vivax and Plasmodium knowlesi, he was finally diagnosed with P. knowlesi mono-infection by DNA sequencing. He was treated with mefloquine, and recovered without any complications. DNA sequencing of the PCR products is indispensable to confirm P. knowlesi infection, however there is limited access to DNA sequencing procedures in endemic areas. The extent of P. knowlesi transmission in Asia has not been clearly defined. There is limited availability of diagnostic tests and routine surveillance system for reporting an accurate diagnosis in the Asian endemic regions. Thus, reporting accurately diagnosed cases of P. knowlesi infection in travellers would be important for assessing the true nature of this emerging human infection.
Collapse
|
58
|
A. Kato T, Yamauchi Y, Horikawa H, Monji A, Mizoguchi Y, Seki Y, Hayakawa K, Utsumi H, Kanba S. Neurotransmitters, Psychotropic Drugs and Microglia: Clinical Implications for Psychiatry. Curr Med Chem 2013. [DOI: 10.2174/092986713804870800] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
|
59
|
Takeuchi H, Yamakawa R, Nishimatsu T, Takeuchi Y, Hayakawa K, Maruyama N. Design of rapidly disintegrating drug delivery films for oral doses with hydoxypropyl methylcellulose. J Drug Deliv Sci Technol 2013. [DOI: 10.1016/s1773-2247(13)50068-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
60
|
Nakamura S, Asai H, Akita S, Aoyama Y, Kamikubo Y, Sugama Y, Takei H, Nishio T, Maruyama K, Hayakawa K. Development of Fast and High-spatial-resolution 3-dimensional Dosimetry Equipment for Both the Narrow Beam and the Broad Beam in Proton Therapy. Int J Radiat Oncol Biol Phys 2012. [DOI: 10.1016/j.ijrobp.2012.07.351] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
61
|
Yamazaki T, Kodaira T, Ota Y, Akimoto T, Wada H, Hiratsuka J, Nishimura Y, Ishihara S, Nonoshita T, Hayakawa K. Retrospective Analysis of Definitive Radiation Therapy for Neck Node Metastasis From Unknown Primary Tumor: Japanese Radiation Oncology Study Group Study. Int J Radiat Oncol Biol Phys 2012. [DOI: 10.1016/j.ijrobp.2012.07.1373] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
62
|
Kamikubo Y, Takaki R, Asai H, Akita S, Yokosawa J, Nakamura S, Takei H, Maruyama K, Hayakawa K. A New Clinical Dose-Measuring Tool for Electron Beam Therapy Using Plastic Scintillator. Int J Radiat Oncol Biol Phys 2012. [DOI: 10.1016/j.ijrobp.2012.07.2248] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
63
|
Nishimura Y, Harada H, Soejima T, Tsujino K, Hayakawa K, Kozuka T, Tanaka M, Sasaki T, Yamamoto N, Nakagawa K. Phase II Study of Nimotuzumab in Combination With Concurrent Chemoradiation Therapy (CRT) in Patients With Locally Advanced Non-small Cell Lung Cancer (NSCLC). Int J Radiat Oncol Biol Phys 2012. [DOI: 10.1016/j.ijrobp.2012.07.282] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
64
|
Ishiyama H, Satoh T, Kitano M, Tabata K, Kotani S, Masaomi I, Shinji K, Masaki K, Baba S, Hayakawa K. High-dose-rate (HDR) Brachytherapy and Hypofractionated External Beam Radiation Therapy Combined With Long-term Hormonal Therapy for High-risk Prostate Cancer. Int J Radiat Oncol Biol Phys 2012. [DOI: 10.1016/j.ijrobp.2012.07.946] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
65
|
Hardy RR, Carmack CE, Shinton SA, Kemp JD, Hayakawa K. Resolution and characterization of pro-B and pre-pro-B cell stages in normal mouse bone marrow. 1991. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2012; 189:3271-3283. [PMID: 22997230] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
|
66
|
Tachiiri S, Tanaka K, Kosuga T, Yanagawa M, Fukushima H, Hayakawa K. EP-1138 ANALYSIS OF TUMRO COVERAGE IN IMAGE-GUIDED POST-OPERATIVE VAGINAL HDR BRACHYTHERAPY OF CERVICAL CANCER. Radiother Oncol 2012. [DOI: 10.1016/s0167-8140(12)71471-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
|
67
|
Kobayashi R, Shiraishi K, Niibe Y, Hayakawa K, Takemoto M, Kaneyasu Y, Kanazawa S, Nagata Y, Nakagawa K. EP-1009 INTENSIVE LOCAL RADIATION THERAPY FOR BONE-ONLY METASTASIS IN BREAST CANCER: A MULTIINSTITUTIONAL STUDY IN JAPAN. Radiother Oncol 2012. [DOI: 10.1016/s0167-8140(12)71342-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
68
|
Hardy RR, Hayakawa K. Positive and negative selection of natural autoreactive B cells. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2012; 750:227-38. [PMID: 22903678 DOI: 10.1007/978-1-4614-3461-0_17] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Naturally occurring antibodies (NAbs) produced by CD5(+) B-1 B cells include those with specificity for thymocytes (anti-thymocyte autoantibody, ATA). Here we describe a prototypic example, encoded by an unmutated immunoglobulin μ/κ heavy chain/light chain. Studies with ATA-μ ("heavy chain only") transgenic mice demonstrated a critical requirement for self-antigen in the accumulation of B cells with this specificity and for the production of high levels of serum ATA NAb. Furthermore, analysis of B-cell development in ATA-μκ ("heavy and light chain") transgenic mice revealed two distinct responses by B cells to expression of this B-cell receptor (BCR). (1) Most B cells developing from bone marrow of adult mice were blocked at an immature stage in spleen and only escaped apoptosis by editing their BCR to eliminate the ATA specificity. (2) Some B cells differentiated to antibody-forming cells without altering their specificity, produced high levels of serum ATA, and many ATA-secreting plasma cells were observed in spleen. Finally, examination of B-cell development and ATA NAb production in ATA-μκ transgenic mice with levels of Thy-1 autoantigen varying from very low to above physiologic reveals a clear relationship between BCR crosslinking by antigen and B-cell fate. Low levels of Thy-1 autoantigen resulted in diversion of ATA B cells into the marginal zone B-cell compartment, presumably because of reduced BCR signaling. Thus, our studies demonstrate a key positive selection step in the development of NAb-producing B cells and show that most of these cells in adult mice bearing such specificities fail to reach a mature stage. Importantly, because these specificities are isolated from B-1 B cells and, when expressed as transgenes, guide development into the B-1 or marginal zone B-cell pool, we identify these B cells as a major source of natural autoantibodies in mice.
Collapse
|
69
|
Shiraishi K, Niibe Y, Nakagawa K, Takemoto M, Kaneyasu Y, Kanazawa S, Nagata Y, Hayakawa K. Impact of Intensive Local Control with Radiation Therapy for Bone-only Oligo-recurrence on Long-term Results in Breast Cancer: A Multi-institutional Study in Japan. Int J Radiat Oncol Biol Phys 2011. [DOI: 10.1016/j.ijrobp.2011.06.1748] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
|
70
|
Asai H, Watanabe T, Takenaka S, Akita S, Kamikubo Y, Oomori K, Takei H, Hayakawa K, Saitou H, Maruyama K. A New Method For Real-time Confirmation Of Information From The Irradiation Area Of X-ray Therapy. Int J Radiat Oncol Biol Phys 2011. [DOI: 10.1016/j.ijrobp.2011.06.1205] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
71
|
Akita S, Asai H, Tomori S, Kamikubo Y, Yokozawa J, Matsubayashi F, Takahashi T, Takei H, Hayakawa K, Maruyama K. Development Of A New Quality Assurance (QA) Tool For VMAT Using A Plastic Scintillator. Int J Radiat Oncol Biol Phys 2011. [DOI: 10.1016/j.ijrobp.2011.06.1575] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
72
|
Fraser ME, Sun T, Hayakawa K. ADP-Mg 2+bound to the ATP-grasp domain of human ATP-citrate lyase. Acta Crystallogr A 2011. [DOI: 10.1107/s0108767311092750] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
|
73
|
Kiyokawa K, Tai Y, Yanaga H, Inoue Y, Hayakawa K, Hirano M, Shigemori M. Evaluation with three-dimensional computed tomography after anterior skull base reconstruction using two musculopericranial flaps and a grafted bone. Skull Base Surg 2011; 9:221-6. [PMID: 17171093 PMCID: PMC1656732 DOI: 10.1055/s-2008-1058150] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
Postoperative evaluation by three-dimensional (3D) computed tomography (CT) was performed in 15 patients who underwent anterior skull base reconstruction using two musculopericranial flaps and a grafted bone sandwiched between the two flaps. Especially in the case of large bone grafts (4 x 4 cm or more), the graft was positioned with the convex side facing upward into the cranial cavity to avoid creating an intracranial dead space. The extent of the absorption and changes in the contour of the grafted bone were evaluated. Imaging was done at a CT level of 150 using a Proceed 3-D CT scanner (Yokogawa Medical Co., Tokyo, Japan). Donor bone for grafting to the skull base was harvested the cranium in 10 patients and the ilium in 5 others. Patients ranged in age from 7 to 76 years (mean, 47); there were 10 men and 5 women. The grafted bone ranged in size from 1 x 2 cm to 5 x 8 cm (1 x 2 cm to about 4 x 3 cm: 10 patients; 4 x 4 to about 5 x 8 cm: 5 patients).No marked absorption of grafted bone was seen in these 15 patients, and no brain hernia occurred. In patients with large bone grafts (4 x 4 cm to about 5 x 8 cm), a graft that had been positioned with the convex side facing upward into cranial cavity at the time of transplant was subsequently observed to be transformed into a downward convex contour of normal skull base. Fostoperative infection did not occur because of the dead space nor were there any symptom of pressure on the brain because of the upward convexity of the grafted bone.The present reconstructive method is not only a minimum invasive but also a safe and reliable method for anterior skull base surgery.
Collapse
|
74
|
Tomizawa R, Watanabe M, Inoue N, Takemura K, Hidaka Y, Akamizu T, Hayakawa K, Iwatani Y. Association of functional GITR gene polymorphisms related to expression of glucocorticoid-induced tumour necrosis factor-receptor (GITR) molecules with prognosis of autoimmune thyroid disease. Clin Exp Immunol 2011; 165:141-7. [PMID: 21592113 DOI: 10.1111/j.1365-2249.2011.04414.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
Abstract
The glucocorticoid-induced tumour necrosis factor (TNF)-receptor (GITR) affects the functions of regulatory T (T(reg)) and effector T (T(eff)) cells, but the significance of this phenomenon is still unclear. To examine the association of single nucleotide polymorphisms (SNPs) in the GITR gene with the expression of GITR molecules on T cells and with the pathological conditions in patients with autoimmune thyroid disease (AITD), we examined the frequencies of four candidate SNPs in AITD patients and healthy volunteers by restriction enzyme analysis and direct sequence analyses. We also analysed the GITR expression on peripheral T(reg) and T(eff) cells in AITD patients by three-colour flow cytometry. The CC genotype in the rs3753348 C/G SNP was significantly more frequent in patients with mild Hashimoto's disease (HD) than in those with severe HD [P = 0·0117, odds ratio (OR) = 3·13]. The AA genotype in the rs2298213 A/G SNP was significantly more frequent in patients with mild HD than in patients with severe HD (P = 0·010, OR = 4·43). All patients and healthy individuals had the GG genotype in rs60038293 A/G and rs11466696 A/G SNPs. The proportions of GITR(+) cells in T(reg) and T(eff) cells were significantly higher in AITD patients with the CC genotype of the rs3753348 SNP than in those with the GG genotype (P = 0·004 and P = 0·011, respectively). In conclusion, the rs3753348 C/G SNP in the GITR is associated with HD prognosis and expression on T(reg) and T(eff) cells.
Collapse
|
75
|
Matsumoto J, Leredde A, Flechard X, Hayakawa K, Shiromaru H, Rangama J, Zhou CL, Guillous S, Hennecart D, Muranaka T, Mery A, Gervais B, Cassimi A. Asymmetry in multiple-electron capture revealed by radiative charge transfer in Ar dimers. PHYSICAL REVIEW LETTERS 2010; 105:263202. [PMID: 21231656 DOI: 10.1103/physrevlett.105.263202] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/28/2010] [Indexed: 05/30/2023]
Abstract
We measured kinetic energies of the fragment ions of argon dimers multiply ionized by low-energy Ar(9+) collisions. For (Ar2)(4+) dissociation, the asymmetric channel (Ar(3+) + Ar(+)) yield is found unexpectedly higher than the symmetric channel (Ar(2+) + Ar(2+)) yield in contrast with previous observation for covalent molecules or clusters. For the dissociation channel (Ar2)(2+)→Ar(+) + Ar(+), two well-separated peaks were observed, clearly evidencing that the direct Coulombic dissociation and the radiative charge transfer followed by ionic dissociation alternatively occur for the dicationic dimers. The respective intensity of these two peaks provides a direct mean to unravel the respective proportion of one-site and two-site double-electron capture, which are found equal for this collision system.
Collapse
|