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Kaptoge S, Seshasai SRK, Sun L, Walker M, Bolton T, Spackman S, Ataklte F, Willeit P, Bell S, Burgess S, Pennells L, Altay S, Assmann G, Ben-Shlomo Y, Best LG, Björkelund C, Blazer DG, Brenner H, Brunner EJ, Dagenais GR, Cooper JA, Cooper C, Crespo CJ, Cushman M, D'Agostino RB, Daimon M, Daniels LB, Danker R, Davidson KW, de Jongh RT, Donfrancesco C, Ducimetiere P, Elders PJM, Engström G, Ford I, Gallacher I, Bakker SJL, Goldbourt U, de La Cámara G, Grimsgaard S, Gudnason V, Hansson PO, Imano H, Jukema JW, Kabrhel C, Kauhanen J, Kavousi M, Kiechl S, Knuiman MW, Kromhout D, Krumholz HM, Kuller LH, Laatikainen T, Lowler DA, Meyer HE, Mukamal K, Nietert PJ, Ninomiya T, Nitsch D, Nordestgaard BG, Palmieri L, Price JF, Ridker PM, Sun Q, Rosengren A, Roussel R, Sakurai M, Salomaa V, Schöttker B, Shaw JE, Strandberg TE, Sundström J, Tolonen H, Tverdal A, Verschuren WMM, Völzke H, Wagenknecht L, Wallace RB, Wannamethee SG, Wareham NJ, Wassertheil-Smoller S, Yamagishi K, Yeap BB, Harrison S, Inouye M, Griffin S, Butterworth AS, Wood AM, Thompson SG, Sattar N, Danesh J, Di Angelantonio E, Tipping RW, Russell S, Johansen M, Bancks MP, Mongraw-Chaffin M, Magliano D, Barr ELM, Zimmet PZ, Knuiman MW, Whincup PH, Willeit J, Willeit P, Leitner C, Lawlor DA, Ben-Shlomo Y, Elwood P, Sutherland SE, Hunt KJ, Cushman M, Selmer RM, Haheim LL, Ariansen I, Tybjaer-Hansen A, Frikkle-Schmidt R, Langsted A, Donfrancesco C, Lo Noce C, Balkau B, Bonnet F, Fumeron F, Pablos DL, Ferro CR, Morales TG, Mclachlan S, Guralnik J, Khaw KT, Brenner H, Holleczek B, Stocker H, Nissinen A, Palmieri L, Vartiainen E, Jousilahti P, Harald K, Massaro JM, Pencina M, Lyass A, Susa S, Oizumi T, Kayama T, Chetrit A, Roth J, Orenstein L, Welin L, Svärdsudd K, Lissner L, Hange D, Mehlig K, Salomaa V, Tilvis RS, Dennison E, Cooper C, Westbury L, Norman PE, Almeida OP, Hankey GJ, Hata J, Shibata M, Furuta Y, Bom MT, Rutters F, Muilwijk M, Kraft P, Lindstrom S, Turman C, Kiyama M, Kitamura A, Yamagishi K, Gerber Y, Laatikainen T, Salonen JT, van Schoor LN, van Zutphen EM, Verschuren WMM, Engström G, Melander O, Psaty BM, Blaha M, de Boer IH, Kronmal RA, Sattar N, Rosengren A, Nitsch D, Grandits G, Tverdal A, Shin HC, Albertorio JR, Gillum RF, Hu FB, Cooper JA, Humphries S, Hill- Briggs F, Vrany E, Butler M, Schwartz JE, Kiyama M, Kitamura A, Iso H, Amouyel P, Arveiler D, Ferrieres J, Gansevoort RT, de Boer R, Kieneker L, Crespo CJ, Assmann G, Trompet S, Kearney P, Cantin B, Després JP, Lamarche B, Laughlin G, McEvoy L, Aspelund T, Thorsson B, Sigurdsson G, Tilly M, Ikram MA, Dorr M, Schipf S, Völzke H, Fretts AM, Umans JG, Ali T, Shara N, Davey-Smith G, Can G, Yüksel H, Özkan U, Nakagawa H, Morikawa Y, Ishizaki M, Njølstad I, Wilsgaard T, Mathiesen E, Sundström J, Buring J, Cook N, Arndt V, Rothenbacher D, Manson J, Tinker L, Shipley M, Tabak AG, Kivimaki M, Packard C, Robertson M, Feskens E, Geleijnse M, Kromhout D. Life expectancy associated with different ages at diagnosis of type 2 diabetes in high-income countries: 23 million person-years of observation. Lancet Diabetes Endocrinol 2023; 11:731-742. [PMID: 37708900 PMCID: PMC7615299 DOI: 10.1016/s2213-8587(23)00223-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/15/2022] [Revised: 07/14/2023] [Accepted: 07/14/2023] [Indexed: 09/16/2023]
Abstract
BACKGROUND The prevalence of type 2 diabetes is increasing rapidly, particularly among younger age groups. Estimates suggest that people with diabetes die, on average, 6 years earlier than people without diabetes. We aimed to provide reliable estimates of the associations between age at diagnosis of diabetes and all-cause mortality, cause-specific mortality, and reductions in life expectancy. METHODS For this observational study, we conducted a combined analysis of individual-participant data from 19 high-income countries using two large-scale data sources: the Emerging Risk Factors Collaboration (96 cohorts, median baseline years 1961-2007, median latest follow-up years 1980-2013) and the UK Biobank (median baseline year 2006, median latest follow-up year 2020). We calculated age-adjusted and sex-adjusted hazard ratios (HRs) for all-cause mortality according to age at diagnosis of diabetes using data from 1 515 718 participants, in whom deaths were recorded during 23·1 million person-years of follow-up. We estimated cumulative survival by applying age-specific HRs to age-specific death rates from 2015 for the USA and the EU. FINDINGS For participants with diabetes, we observed a linear dose-response association between earlier age at diagnosis and higher risk of all-cause mortality compared with participants without diabetes. HRs were 2·69 (95% CI 2·43-2·97) when diagnosed at 30-39 years, 2·26 (2·08-2·45) at 40-49 years, 1·84 (1·72-1·97) at 50-59 years, 1·57 (1·47-1·67) at 60-69 years, and 1·39 (1·29-1·51) at 70 years and older. HRs per decade of earlier diagnosis were similar for men and women. Using death rates from the USA, a 50-year-old individual with diabetes died on average 14 years earlier when diagnosed aged 30 years, 10 years earlier when diagnosed aged 40 years, or 6 years earlier when diagnosed aged 50 years than an individual without diabetes. Using EU death rates, the corresponding estimates were 13, 9, or 5 years earlier. INTERPRETATION Every decade of earlier diagnosis of diabetes was associated with about 3-4 years of lower life expectancy, highlighting the need to develop and implement interventions that prevent or delay the onset of diabetes and to intensify the treatment of risk factors among young adults diagnosed with diabetes. FUNDING British Heart Foundation, Medical Research Council, National Institute for Health and Care Research, and Health Data Research UK.
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Maeda K, Yoshida K, Nishizawa T, Otani K, Yamashita Y, Okabe H, Hadano Y, Kayama T, Kurosaka D, Saito M. Inflammation and Bone Metabolism in Rheumatoid Arthritis: Molecular Mechanisms of Joint Destruction and Pharmacological Treatments. Int J Mol Sci 2022; 23:ijms23052871. [PMID: 35270012 PMCID: PMC8911191 DOI: 10.3390/ijms23052871] [Citation(s) in RCA: 38] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2021] [Revised: 02/28/2022] [Accepted: 03/02/2022] [Indexed: 12/31/2022] Open
Abstract
Rheumatoid arthritis (RA) is an inflammatory disease characterized by a variety of symptoms and pathologies often presenting with polyarthritis. The primary symptom in the initial stage is joint swelling due to synovitis. With disease progression, cartilage and bone are affected to cause joint deformities. Advanced osteoarticular destruction and deformation can cause irreversible physical disabilities. Physical disabilities not only deteriorate patients’ quality of life but also have substantial medical economic effects on society. Therefore, prevention of the progression of osteoarticular destruction and deformation is an important task. Recent studies have progressively improved our understanding of the molecular mechanism by which synovitis caused by immune disorders results in activation of osteoclasts; activated osteoclasts in turn cause bone destruction and para-articular osteoporosis. In this paper, we review the mechanisms of bone metabolism under physiological and RA conditions, and we describe the effects of therapeutic intervention against RA on bone.
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Affiliation(s)
- Kazuhiro Maeda
- Department of Orthopaedic Surgery, The Jikei University School of Medicine, 3-25-8 Nishi-Shimbashi, Minato-ku, Tokyo 105-8461, Japan; (T.N.); (Y.Y.); (H.O.); (Y.H.); (T.K.); (M.S.)
- Correspondence: ; Tel.: +81-3-3433-1111
| | - Ken Yoshida
- Division of Rheumatology, Department of Internal Medicine, The Jikei University School of Medicine, 3-25-8 Nishi-Shimbashi, Minato-ku, Tokyo 105-8461, Japan; (K.Y.); (K.O.); (D.K.)
| | - Tetsuro Nishizawa
- Department of Orthopaedic Surgery, The Jikei University School of Medicine, 3-25-8 Nishi-Shimbashi, Minato-ku, Tokyo 105-8461, Japan; (T.N.); (Y.Y.); (H.O.); (Y.H.); (T.K.); (M.S.)
| | - Kazuhiro Otani
- Division of Rheumatology, Department of Internal Medicine, The Jikei University School of Medicine, 3-25-8 Nishi-Shimbashi, Minato-ku, Tokyo 105-8461, Japan; (K.Y.); (K.O.); (D.K.)
| | - Yu Yamashita
- Department of Orthopaedic Surgery, The Jikei University School of Medicine, 3-25-8 Nishi-Shimbashi, Minato-ku, Tokyo 105-8461, Japan; (T.N.); (Y.Y.); (H.O.); (Y.H.); (T.K.); (M.S.)
| | - Hinako Okabe
- Department of Orthopaedic Surgery, The Jikei University School of Medicine, 3-25-8 Nishi-Shimbashi, Minato-ku, Tokyo 105-8461, Japan; (T.N.); (Y.Y.); (H.O.); (Y.H.); (T.K.); (M.S.)
| | - Yuka Hadano
- Department of Orthopaedic Surgery, The Jikei University School of Medicine, 3-25-8 Nishi-Shimbashi, Minato-ku, Tokyo 105-8461, Japan; (T.N.); (Y.Y.); (H.O.); (Y.H.); (T.K.); (M.S.)
| | - Tomohiro Kayama
- Department of Orthopaedic Surgery, The Jikei University School of Medicine, 3-25-8 Nishi-Shimbashi, Minato-ku, Tokyo 105-8461, Japan; (T.N.); (Y.Y.); (H.O.); (Y.H.); (T.K.); (M.S.)
| | - Daitaro Kurosaka
- Division of Rheumatology, Department of Internal Medicine, The Jikei University School of Medicine, 3-25-8 Nishi-Shimbashi, Minato-ku, Tokyo 105-8461, Japan; (K.Y.); (K.O.); (D.K.)
| | - Mitsuru Saito
- Department of Orthopaedic Surgery, The Jikei University School of Medicine, 3-25-8 Nishi-Shimbashi, Minato-ku, Tokyo 105-8461, Japan; (T.N.); (Y.Y.); (H.O.); (Y.H.); (T.K.); (M.S.)
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Kijima E, Kayama T, Saito M, Kurosaka D, Ikeda R, Hayashi H, Kubota D, Hyakutake T, Marumo K. Pre-operative hemoglobin level and use of sedative-hypnotics are independent risk factors for post-operative delirium following total knee arthroplasty. BMC Musculoskelet Disord 2020; 21:279. [PMID: 32359366 PMCID: PMC7196215 DOI: 10.1186/s12891-020-03206-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/24/2019] [Accepted: 03/11/2020] [Indexed: 02/08/2023] Open
Abstract
BACKGROUND Delirium is a well-known complication following surgery, especially with the increasing age of patients undergoing surgery. The increasing demands resulting from a prolonged healthy life expectancy has resulted in more arthroplasties despite their age and existing comorbidities. The purpose of this study is to explore the various risk factors that may contribute to delirium in unilateral and bilateral total knee arthroplasties in the elderly population. METHODS 170 patients who underwent unilateral or bilateral total knee arthroplasties were analyzed retrospectively for delirium. Age, sex, comorbidities, use of sedative-hypnotics, peri-operative blood loss, pre- and post-operative laboratory blood test results were investigated and analyzed. RESULTS The incidence of post-operative delirium was 6.5% (11 out of 170 patients) with a mean age of 79.5 (± 6.9) years, compared to 73.0 (± 9.0) years in the non-delirium group. Higher age, use of sedative-hypnotics, low pre-operative Hb and Ht, low post-operative Hb, Ht and BUN were observed in the delirium group. Multivariate logistic regression analysis identified that the use of sedative-hypnotics and pre-operative Hb level were independent risk factors for post-operative delirium after TKA. The odds ratios for the use of sedative-hypnotics and pre-operative Hb level were 4.6 and 0.53, respectively. Receiver operating characteristic curve analysis showed that pre-operative Hb of less than 11.1 g/dL was a predictor for the development of delirium, with a sensitivity of 54.6% and a specificity of 91.6%. CONCLUSION Patients with a pre-operative Hb level of < 11.1 g/dL or those using sedative-hypnotics are associated with post-operative delirium. Peri-operative management and preventative measures are therefore needed to reduce the risks of post-operative delirium in such patients.
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Affiliation(s)
- Eiji Kijima
- Department of Orthopaedic Surgery, The Jikei University School of Medicine, 3-25-8 Nishi-Shimbashi, Minato-ku, Tokyo, 105-8461, Japan
| | - Tomohiro Kayama
- Department of Orthopaedic Surgery, The Jikei University School of Medicine, 3-25-8 Nishi-Shimbashi, Minato-ku, Tokyo, 105-8461, Japan.
| | - Mitsuru Saito
- Department of Orthopaedic Surgery, The Jikei University School of Medicine, 3-25-8 Nishi-Shimbashi, Minato-ku, Tokyo, 105-8461, Japan
| | - Daisaburo Kurosaka
- Department of Orthopaedic Surgery, The Jikei University School of Medicine, 3-25-8 Nishi-Shimbashi, Minato-ku, Tokyo, 105-8461, Japan
| | - Ryo Ikeda
- Department of Orthopaedic Surgery, The Jikei University School of Medicine, 3-25-8 Nishi-Shimbashi, Minato-ku, Tokyo, 105-8461, Japan
| | - Hiroteru Hayashi
- Department of Orthopaedic Surgery, The Jikei University School of Medicine, 3-25-8 Nishi-Shimbashi, Minato-ku, Tokyo, 105-8461, Japan
| | - Daisuke Kubota
- Department of Orthopaedic Surgery, The Jikei University School of Medicine, 3-25-8 Nishi-Shimbashi, Minato-ku, Tokyo, 105-8461, Japan
| | - Takashi Hyakutake
- Department of Orthopaedic Surgery, The Jikei University School of Medicine, 3-25-8 Nishi-Shimbashi, Minato-ku, Tokyo, 105-8461, Japan
| | - Keishi Marumo
- Department of Orthopaedic Surgery, The Jikei University School of Medicine, 3-25-8 Nishi-Shimbashi, Minato-ku, Tokyo, 105-8461, Japan
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Ryu K, Saito M, Kurosaka D, Kitasato S, Omori T, Hayashi H, Kayama T, Marumo K. Enhancement of tendon-bone interface healing and graft maturation with cylindrical titanium-web (TW) in a miniature swine anterior cruciate ligament reconstruction model: histological and collagen-based analysis. BMC Musculoskelet Disord 2020; 21:198. [PMID: 32234036 PMCID: PMC7110724 DOI: 10.1186/s12891-020-03199-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/30/2019] [Accepted: 03/10/2020] [Indexed: 12/11/2022] Open
Abstract
Background Tendon-bone interface healing and ligamentization of the graft in anterior cruciate ligament (ACL) reconstruction with autografts are important factors affecting treatment outcome. This study aimed to investigate the effectiveness of a cylindrical titanium-web (TW) in tendon-bone interface healing and graft maturation in ACL reconstruction. Methods Fourteen mature female CLAWN miniature swine underwent bilateral ACL reconstructions with patellar tendon (PT) autografts. In one limb, the TW/tendon complex was placed into the proximal side of the tibial tunnel. Only the graft was transplanted into the tunnel in the control limb. The proximal side of the graft was sutured into the stump of the native ACL and the distal end was stapled to the tibia. The animals were euthanized at 4 and 15 weeks postoperatively, for histological and biochemical analyses. Results Microscopic images in TW limbs showed that ingrowth of tendon-like tissue and mineralized bone tissue into the TW connected the bone and the tendon directly. In contrast, fibrous tissue intervened between the bone and tendon in the control limbs. The total amount of collagen cross-links (which defines the strength of collagen fibers) and the maturation of collagen cross-links in TW tendons were significantly higher (p < 0.05) than those of control limbs. There was no significant difference in the ratio of dihydroxy-lysinonorleucine to hydroxy-lysinonorleucine (an indicator of tissue specific collagen maturation) between TW tendons and that of the native PT. Conclusions TW promoted the maturation and formation of collagen cross-links in the grafted tendon while maintaining the cross-links pattern of native tendon collagen, and enabled direct binding of tendon to bone.
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Affiliation(s)
- Keisho Ryu
- Department of Orthopaedic Surgery, The Jikei University School of Medicine, 3-25-8, Nishi-Shimbashi, Tokyo, Minato-ku, 105-8461, Japan.
| | - Mitsuru Saito
- Department of Orthopaedic Surgery, The Jikei University School of Medicine, 3-25-8, Nishi-Shimbashi, Tokyo, Minato-ku, 105-8461, Japan
| | - Daisaburo Kurosaka
- Department of Orthopaedic Surgery, The Jikei University School of Medicine, 3-25-8, Nishi-Shimbashi, Tokyo, Minato-ku, 105-8461, Japan
| | - Seiichiro Kitasato
- Department of Orthopaedic Surgery, The Jikei University School of Medicine, 3-25-8, Nishi-Shimbashi, Tokyo, Minato-ku, 105-8461, Japan
| | - Toshiyuki Omori
- Department of Orthopaedic Surgery, The Jikei University School of Medicine, 3-25-8, Nishi-Shimbashi, Tokyo, Minato-ku, 105-8461, Japan
| | - Hiroteru Hayashi
- Department of Orthopaedic Surgery, The Jikei University School of Medicine, 3-25-8, Nishi-Shimbashi, Tokyo, Minato-ku, 105-8461, Japan
| | - Tomohiro Kayama
- Department of Orthopaedic Surgery, The Jikei University School of Medicine, 3-25-8, Nishi-Shimbashi, Tokyo, Minato-ku, 105-8461, Japan
| | - Keishi Marumo
- Department of Orthopaedic Surgery, The Jikei University School of Medicine, 3-25-8, Nishi-Shimbashi, Tokyo, Minato-ku, 105-8461, Japan
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Hayashi H, Kurosaka D, Saito M, Ikeda R, Kubota D, Kayama T, Hyakutake T, Marumo K. Positioning the femoral bone socket and the tibial bone tunnel using a rectangular retro-dilator in anterior cruciate ligament reconstruction. PLoS One 2019; 14:e0215778. [PMID: 31048889 PMCID: PMC6497238 DOI: 10.1371/journal.pone.0215778] [Citation(s) in RCA: 2] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2019] [Accepted: 04/08/2019] [Indexed: 11/18/2022] Open
Abstract
Purpose The purpose of this study was to evaluate the positions of femoral bone sockets and tibial bone tunnels made with the rectangular retro-dilator (RRD), which we manufactured for anterior cruciate ligament reconstruction (ACLR) with a bone-patella tendon-bone (BPTB) graft which is fixed into the rectangular bone socket and tunnel made at anatomical ACL insertion sites. Methods 42 patients who had undergone ACLR with BPTB using the RRD were evaluated to assess bone socket and tunnel positions by the quadrant method and Magnussen classification using three-dimensional (3-D) CT. Intra-operative complications were also investigated in all patients. Results 3-D CT of the operated knee joints using the RRD showed that the bone socket and tunnel were placed in anatomical positions. In the quadrant method, the mean position of the femoral bone socket aperture was located at 22.0 ± 4.2% along the Blumensaat’s line, and 37.4 ± 7.2% across the posterior condylar rim. The mean positions of the tibial bone tunnel aperture were 37.7 ± 5.2% and 46.1 ± 2.2% antero-posteriorly and medio-laterally, respectively. In addition, according to the Magnussen classification, 39 cases were evaluated as type 1, and almost all were located behind the lateral intercondylar ridge (also known as the resident’s ridge). 3 cases were classified as type 2, which overlapped with the resident’s ridge. A partial fracture of BPTB bone fragment was observed in 2 patients, but no serious complications including neurovascular injury were observed. Conclusion The study indicates that the use of RRD achieves a safe anatomical reconstruction of the ACL.
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Affiliation(s)
- Hiroteru Hayashi
- Department of Orthopaedic Surgery, The Jikei University School of Medicine, Tokyo, Japan
- * E-mail:
| | - Daisaburo Kurosaka
- Department of Orthopaedic Surgery, The Jikei University School of Medicine, Tokyo, Japan
| | - Mitsuru Saito
- Department of Orthopaedic Surgery, The Jikei University School of Medicine, Tokyo, Japan
| | - Ryo Ikeda
- Department of Orthopaedic Surgery, The Jikei University School of Medicine, Tokyo, Japan
| | - Daisuke Kubota
- Department of Orthopaedic Surgery, The Jikei University School of Medicine, Tokyo, Japan
| | - Tomohiro Kayama
- Department of Orthopaedic Surgery, The Jikei University School of Medicine, Tokyo, Japan
| | - Takashi Hyakutake
- Department of Orthopaedic Surgery, The Jikei University School of Medicine, Tokyo, Japan
| | - Keishi Marumo
- Department of Orthopaedic Surgery, The Jikei University School of Medicine, Tokyo, Japan
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Ishida YI, Kayama T, Kibune Y, Nishimoto S, Koike S, Suzuki T, Horiuchi Y, Miyashita M, Itokawa M, Arai M, Ogasawara Y. Identification of an argpyrimidine-modified protein in human red blood cells from schizophrenic patients: A possible biomarker for diseases involving carbonyl stress. Biochem Biophys Res Commun 2017; 493:573-577. [PMID: 28867194 DOI: 10.1016/j.bbrc.2017.08.150] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [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: 08/15/2017] [Accepted: 08/25/2017] [Indexed: 12/14/2022]
Abstract
Argpyrimidine (ARP) is an advanced glycation end product thought to be generated from a reaction between methylglyoxal and arginine residues in proteins. In this study, we observed marked accumulation of an approximately 56 kD protein, reactive to anti-ARP antibodies, in the red blood cells (RBCs) of some patients with refractory schizophrenia. This ARP-modified protein was purified from the blood of schizophrenic patients and identified as selenium binding protein 1 (SBP1) by LC-MS/MS. This is the first report of ARP-modified proteins accumulating in RBCs of patients with diseases involving carbonyl stress. We also observed high accumulation of ARP-modified SBP1 in the RBCs of patients with chronic kidney disease. Therefore, this modified protein may be a novel marker of carbonyl stress.
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Affiliation(s)
- Y I Ishida
- Department of Molecular and Cellular Biochemistry, Meiji Pharmaceutical University, 2-522-1 Noshio, Kiyose, Nishitokyo, Tokyo 204-8588, Japan
| | - T Kayama
- Department of Analytical Biohemistry, Meiji Pharmaceutical University, 2-522-1 Noshio, Kiyose, Nishitokyo, Tokyo 204-8588, Japan
| | - Y Kibune
- Department of Analytical Biohemistry, Meiji Pharmaceutical University, 2-522-1 Noshio, Kiyose, Nishitokyo, Tokyo 204-8588, Japan
| | - S Nishimoto
- Department of Analytical Biohemistry, Meiji Pharmaceutical University, 2-522-1 Noshio, Kiyose, Nishitokyo, Tokyo 204-8588, Japan
| | - S Koike
- Department of Analytical Biohemistry, Meiji Pharmaceutical University, 2-522-1 Noshio, Kiyose, Nishitokyo, Tokyo 204-8588, Japan
| | - T Suzuki
- Department of Analytical Biohemistry, Meiji Pharmaceutical University, 2-522-1 Noshio, Kiyose, Nishitokyo, Tokyo 204-8588, Japan
| | - Y Horiuchi
- Department of Psychiatry and Behavioral Sciences, Tokyo Metropolitan Institute of Medical Science, Kamikitazawa, Setagaya, Tokyo 156-8506, Japan
| | - M Miyashita
- Department of Psychiatry and Behavioral Sciences, Tokyo Metropolitan Institute of Medical Science, Kamikitazawa, Setagaya, Tokyo 156-8506, Japan
| | - M Itokawa
- Department of Psychiatry and Behavioral Sciences, Tokyo Metropolitan Institute of Medical Science, Kamikitazawa, Setagaya, Tokyo 156-8506, Japan
| | - M Arai
- Department of Psychiatry and Behavioral Sciences, Tokyo Metropolitan Institute of Medical Science, Kamikitazawa, Setagaya, Tokyo 156-8506, Japan
| | - Y Ogasawara
- Department of Analytical Biohemistry, Meiji Pharmaceutical University, 2-522-1 Noshio, Kiyose, Nishitokyo, Tokyo 204-8588, Japan.
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Koda N, Sato T, Shinohara M, Ichinose S, Ito Y, Nakamichi R, Kayama T, Kataoka K, Suzuki H, Moriyama K, Asahara H. The transcription factor mohawk homeobox regulates homeostasis of the periodontal ligament. Development 2016; 144:313-320. [PMID: 27993989 DOI: 10.1242/dev.135798] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2016] [Accepted: 11/28/2016] [Indexed: 12/23/2022]
Abstract
The periodontal ligament (PDL), which connects the teeth to the alveolar bone, is essential for periodontal tissue homeostasis. Although the significance of the PDL is recognized, molecular mechanisms underlying PDL function are not well known. We report that mohawk homeobox (Mkx), a tendon-specific transcription factor, regulates PDL homeostasis by preventing its degeneration. Mkx is expressed in the mouse PDL at the age of 10 weeks and expression remained at similar levels at 12 months. In Mkx-/- mice, age-dependent expansion of the PDL at the maxillary first molar (M1) furcation area was observed. Transmission electron microscopy (TEM) revealed that Mkx-/- mice presented collagen fibril degeneration in PDL with age, while the collagen fibril diameter gradually increased in Mkx+/+ mice. PDL cells lost their shape in Mkx-/- mice, suggesting changes in PDL properties. Microarray and quantitative polymerase chain reaction (qPCR) analyses of Mkx-/- PDL revealed an increase in osteogenic gene expression and no change in PDL- and inflammatory-related gene expression. Additionally, COL1A1 and COL1A2 were upregulated in Mkx-overexpressing human PDL fibroblasts, whereas osteogenic genes were downregulated. Our results indicate that Mkx prevents PDL degeneration by regulating osteogenesis.
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Affiliation(s)
- Naoki Koda
- Department of Systems BioMedicine, Tokyo Medical and Dental University (TMDU), 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8510, Japan.,Maxillofacial Orthognathics, Tokyo Medical and Dental University (TMDU), 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8510, Japan
| | - Tempei Sato
- Department of Systems BioMedicine, Tokyo Medical and Dental University (TMDU), 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8510, Japan
| | - Masahiro Shinohara
- Department of Systems BioMedicine, Tokyo Medical and Dental University (TMDU), 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8510, Japan.,JST, PRESTO, 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan
| | - Shizuko Ichinose
- Research Center for Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8510, Japan
| | - Yoshiaki Ito
- Department of Systems BioMedicine, Tokyo Medical and Dental University (TMDU), 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8510, Japan
| | - Ryo Nakamichi
- Department of Systems BioMedicine, Tokyo Medical and Dental University (TMDU), 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8510, Japan
| | - Tomohiro Kayama
- Department of Systems BioMedicine, Tokyo Medical and Dental University (TMDU), 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8510, Japan
| | - Kensuke Kataoka
- Department of Systems BioMedicine, Tokyo Medical and Dental University (TMDU), 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8510, Japan
| | - Hidetsugu Suzuki
- Department of Systems BioMedicine, Tokyo Medical and Dental University (TMDU), 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8510, Japan
| | - Keiji Moriyama
- Maxillofacial Orthognathics, Tokyo Medical and Dental University (TMDU), 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8510, Japan
| | - Hiroshi Asahara
- Department of Systems BioMedicine, Tokyo Medical and Dental University (TMDU), 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8510, Japan .,Department of Molecular and Experimental Medicine, The Scripps Research Institute, 10550 North Torrey Pines Road, MEM-161, La Jolla, CA 92037, USA
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Sako T, Yamaguchi A, Sato K, Goto A, Iwai T, Nayuki T, Nemoto K, Kayama T, Takeuchi T. Development of C⁶⁺ laser ion source and RFQ linac for carbon ion radiotherapy. Rev Sci Instrum 2016; 87:02C109. [PMID: 26932119 DOI: 10.1063/1.4935975] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
A prototype C(6+) injector using a laser ion source has been developed for a compact synchrotron dedicated to carbon ion radiotherapy. The injector consists of a laser ion source and a 4-vane radio-frequency quadrupole (RFQ) linac. Ion beams are extracted from plasma and directly injected into the RFQ. A solenoid guides the low-energy beams into the RFQ. The RFQ is designed to accelerate high-intensity pulsed beams. A structure of monolithic vanes and cavities is adopted to reduce its power consumption. In beam acceleration tests, a solenoidal magnetic field set between the laser ion source and the RFQ helped increase both the peak currents before and after the RFQ by a factor of 4.
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Affiliation(s)
- T Sako
- Toshiba Corporation, Yokohama 235-8522, Japan
| | - A Yamaguchi
- Toshiba Corporation, Yokohama 235-8522, Japan
| | - K Sato
- Toshiba Corporation, Yokohama 235-8522, Japan
| | - A Goto
- Cancer Research Center, Yamagata University Faculty of Medicine, Yamagata 990-9585, Japan
| | - T Iwai
- Cancer Research Center, Yamagata University Faculty of Medicine, Yamagata 990-9585, Japan
| | - T Nayuki
- Cancer Research Center, Yamagata University Faculty of Medicine, Yamagata 990-9585, Japan
| | - K Nemoto
- Cancer Research Center, Yamagata University Faculty of Medicine, Yamagata 990-9585, Japan
| | - T Kayama
- Cancer Research Center, Yamagata University Faculty of Medicine, Yamagata 990-9585, Japan
| | - T Takeuchi
- Accelerator Engineering Corporation, Chiba 263-0043, Japan
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Ito H, Hozawa A, Yamashita H, Kubota I, Nemoto K, Yoshioka T, Kayama T, Murakami M. Employment status among non-retired cancer survivors in Japan. Eur J Cancer Care (Engl) 2015; 24:718-23. [PMID: 25752868 DOI: 10.1111/ecc.12304] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/01/2015] [Indexed: 11/28/2022]
Abstract
Employed cancer patients confront some challenges as they attempt to return to work after treatment. We aimed to identify correlates of return to work for cancer survivors in Japan, with an emphasis on employment status. Participants were 260 patients (aged <65 years) who had received a cancer diagnosis ≥ 1 year previously and who were employed at the time of diagnosis. Participants completed questionnaires at consultations at any Regional Cancer Center Hospitals in Yamagata, Japan between 28 November 2011 and 9 December 2011. Logistic regression analysis was used to identify correlates of return to work. Data cross-tabulation was used to evaluate relationships to workplace and income-changes by employment status. A high proportion of patients (75.8%) had returned to work. Non-regularly employed survivors were less likely to return to work (odds ratio = 5.03; 95% confidence interval, 1.18-21.35). Individuals with poor health, advanced-stage tumours, of advanced age and women were significantly less likely to return to work. Only 52.8% of non-regular employees continued to be employed, and their income decreased by as much as 61.1%. Social and financial support policies should be organised based on more intensive study of employment circumstances.
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Affiliation(s)
- H Ito
- Department of Health Policy Science, Graduate School of Medical Science, Yamagata University, Yamagata, Japan
| | - A Hozawa
- Department of Preventive Medicine and Epidemiology, Tohoku Medical Megabank Organization, Tohoku University, Sendai, Japan
| | - H Yamashita
- Department of Ophthalmology, Faculty of Medicine, Yamagata University, Yamagata, Japan
| | - I Kubota
- Department of Cardiology, Pulmonology, and Nephrology, Faculty of Medicine, Yamagata University, Yamagata, Japan
| | - K Nemoto
- Department of Radiation Oncology, Faculty of Medicine, Yamagata University, Yamagata, Japan
| | - T Yoshioka
- Department of Clinical Oncology, Faculty of Medicine, Yamagata University, Yamagata, Japan
| | - T Kayama
- Department of Neurosurgery, Graduate School of Medical Science, Yamagata University, Yamagata, Japan
| | - M Murakami
- Department of Health Policy Science, Graduate School of Medical Science, Yamagata University, Yamagata, Japan
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Nagahata S, Nagahata M, Obara M, Kondo R, Minagawa N, Sato S, Sato S, Mouri W, Saito S, Kayama T. Wall Enhancement of the Intracranial Aneurysms Revealed by Magnetic Resonance Vessel Wall Imaging Using Three-Dimensional Turbo Spin-Echo Sequence with Motion-Sensitized Driven-Equilibrium: A Sign of Ruptured Aneurysm? Clin Neuroradiol 2014; 26:277-83. [DOI: 10.1007/s00062-014-0353-z] [Citation(s) in RCA: 92] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2014] [Accepted: 10/03/2014] [Indexed: 10/24/2022]
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Matsuda K, Sakurada K, Kokubo Y, Sato S, Nakazato Y, Kayama T. An esophageal neuroendocrine tumor metastatic to the pineal region. Brain Tumor Pathol 2014; 31:192-7. [DOI: 10.1007/s10014-014-0178-0] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2013] [Accepted: 01/22/2014] [Indexed: 11/30/2022]
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Ahmed I, Biswas A, Krishnamurthy S, Julka P, Rath G, Back M, Huang D, Gzell C, Chen J, Kastelan M, Gaur P, Wheeler H, Badiyan SN, Robinson CG, Simpson JR, Tran DD, Rich KM, Dowling JL, Chicoine MR, Leuthardt EC, Kim AH, Huang J, Michaelsen SR, Christensen IJ, Grunnet K, Stockhausen MT, Broholm H, Kosteljanetz M, Poulsen HS, Tieu M, Lovblom E, Macnamara M, Mason W, Rodin D, Tai E, Ubhi K, Laperriere N, Millar BA, Menard C, Perkins B, Chung C, Clarke J, Molinaro A, Phillips J, Butowski N, Chang S, Perry A, Costello J, DeSilva A, Rabbitt J, Prados M, Cohen AL, Anker C, Shrieve D, Hall B, Salzman K, Jensen R, Colman H, Farber O, Weinberg U, Palti Y, Fisher B, Chen H, Macdonald D, Lesser G, Coons S, Brachman D, Ryu S, Werner-Wasik M, Bahary JP, Chakravarti A, Mehta M, Gupta T, Nair V, Epari S, Godasastri J, Moiyadi A, Shetty P, Juvekar S, Jalali R, Herrlinger U, Schafer N, Steinbach J, Weyerbrock A, Hau P, Goldbrunner R, Kohnen R, Urbach H, Stummer W, Glas M, Houillier C, Ghesquieres H, Chabrot C, Soussain C, Ahle G, Choquet S, Faurie P, Bay JO, Vargaftig J, Gaultier C, Nicolas-Virelizier E, Hoang-Xuan K, Iskanderani O, Izar F, Benouaich-Amiel A, Filleron T, Moyal E, Iweha C, Jain S, Melian E, Sethi A, Albain K, Shafer D, Emami B, Kong XT, Green S, Filka E, Green R, Yong W, Nghiemphu P, Cloughesy T, Lai A, Mallick S, Biswas A, Roy S, Purkait S, Gupta S, Julka PK, Rath GK, Marosi C, Thaler J, Ay C, Kaider A, Reitter EM, Haselbock J, Preusser M, Flechl B, Zielinski C, Pabinger I, Miyatake SI, Furuse M, Miyata T, Yoritsune E, Kawabata S, Kuroiwa T, Muragaki Y, Maruyama T, Iseki H, Akimoto J, Ikuta S, Nitta M, Maebayashi K, Saito T, Okada Y, Kaneko S, Matsumura A, Kuroiwa T, Karasawa K, Nakazato Y, Kayama T, Nabors LB, Fink KL, Mikkelsen T, Grujicic D, Tarnawski R, Nam DH, Mazurkiewicz M, Salacz M, Ashby L, Thurzo L, Zagonel V, Depenni R, Perry JR, Henslee-Downey J, Picard M, Reardon DA, Nambudiri N, Nayak L, LaFrankie D, Wen P, Ney D, Carlson J, Damek D, Blatchford P, Gaspar L, Kavanagh B, Waziri A, Lillehei K, Reddy K, Chen C, Rashed I, Melian E, Sethi A, Barton K, Anderson D, Prabhu V, Rusch R, Belongia M, Maheshwari M, Firat S, Schiff D, Desjardins A, Cloughesy T, Mikkelsen T, Glantz M, Chamberlain M, Reardon DA, Wen P, Shapiro W, Gopal S, Judy K, Patel S, Mahapatra A, Shan J, Gupta D, Shih K, Bacha JA, Brown D, Garner WJ, Steino A, Schwart R, Kanekal S, Li M, Lopez L, Burris HA, Soderberg-Naucler C, Rahbar A, Stragliotto G, Song AJ, Kumar AMS, Murphy ES, Tekautz T, Suh JH, Recinos V, Chao ST, Spoor J, Korami K, Kloezeman J, Balvers R, Dirven C, Lamfers M, Leenstra S, Sumrall A, Haggstrom D, Crimaldi A, Symanowski J, Giglio P, Asher A, Burri S, Sunkersett G, Khatib Z, Prajapati CM, Magalona EE, Mariano M, Sih IM, Torcuator R, Taal W, Oosterkamp H, Walenkamp A, Beerenpoot L, Hanse M, Buter J, Honkoop A, Boerman D, de Vos F, Jansen R, van der Berkmortel F, Brandsma D, Enting R, Kros J, Bromberg J, van Heuvel I, Smits M, van der Holt R, Vernhout R, van den Bent M, Weinberg U, Farber O, Palti Y, Wick W, Suarez C, Rodon J, Desjardins A, Forsyth P, Gueorguieva I, Cleverly A, Burkholder T, Desaiah D, Lahn M, Zach L, Guez D, Last D, Daniels D, Nissim O, Grober Y, Hoffmann C, Nass D, Talianski A, Spiegelmann R, Cohen Z, Mardor Y. MEDICAL RADIATION THERAPIES. Neuro Oncol 2013; 15:iii75-iii84. [PMCID: PMC3823894 DOI: 10.1093/neuonc/not179] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/21/2023] Open
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Matsutani M, Ushio Y, Abe H, Yamashita J, Shibui S, Fujimaki T, Takakura K, Nomura K, Tanaka R, Fukui M, Yoshimoto T, Hayakawa T, Nagashima T, Kurisu K, Kayama T. Combined chemotherapy and radiation therapy for central nervous system germ cell tumors: preliminary results of a Phase II study of the Japanese Pediatric Brain Tumor Study Group. Neurosurg Focus 2013; 5:e7. [PMID: 17140188 DOI: 10.3171/foc.1998.5.1.10] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
The authors conducted a multiinstitutional phase II study to establish a postsurgical combined chemotherapy and radiation therapy regimen for patients with primary germ cell tumors of the brain. After surgical debulking of the tumor and histological verification, patients were divided into three therapeutic groups: good prognosis, intermediate prognosis, and poor prognosis. Patients received two kinds of chemotherapy (three courses) prior to receiving radiation therapy: carboplatin-etoposide combination ([CARB-VP]: carboplatin 450 mg/m(2) on Day 1, etoposide 150 mg/m(2) on Days 1-3) or ifosphamide-cisplatin-etoposide combination ([ICE]: ifosphamide 900 mg/m(2), cisplatin 20 mg/m(2), and etoposide 60 mg/m(2) on Days 1-5). Patients in the good prognosis group (those with germinomas) were treated with CARB-VP followed by local radiation therapy (24 Gy). Patients in the intermediate prognosis group received CARB-VP followed by local radiation therapy (50 Gy); they received five additional chemotherapy treatments. Patients in the poor prognosis group received ICE followed by whole craniospinal radiation therapy; they also received five additional chemotherapy treatments. Eighty-two patients were evaluated. For the 56 patients with germinomas, a 93% rate of complete remission after treatment was achieved. The remission rate was 76% for 21 patients in the intermediate prognosis group, and no recurrence was detected during a median follow-up period of 2.6 years. In the group of five patients with poor prognosis, the disease in three patients progressed during chemotherapy or radiation therapy and they died within 6 months. There were no serious complications in the surviving patients. The authors found their treatment protocols to be currently effective for patients with germinomas and those with an intermediate prognosis.
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Affiliation(s)
- M Matsutani
- Departments of Neurosurgery, Saitama Medical School, Moroyama; Japan
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Clarke JL, Ennis MM, Lamborn KR, Prados MD, Puduvalli VK, Penas-Prado M, Gilbert MR, Groves MD, Hess KR, Levin VA, de Groot J, Colman H, Conrad CA, Loghin ME, Hunter K, Yung WK, Chen C, Damek D, Liu A, Gaspar LE, Waziri A, Lillehei K, Kavanagh B, Finlay JL, Haley K, Dhall G, Gardner S, Allen J, Cornelius A, Olshefski R, Garvin J, Pradhan K, Etzl M, Goldman S, Atlas M, Thompson S, Hirt A, Hukin J, Comito M, Bertolone S, Torkildson J, Joyce M, Moertel C, Letterio J, Kennedy G, Walter A, Ji L, Sposto R, Dorris K, Wagner L, Hummel T, Drissi R, Miles L, Leach J, Chow L, Turner R, Gragert MN, Pruitt D, Sutton M, Breneman J, Crone K, Fouladi M, Friday BB, Buckner J, Anderson SK, Giannini C, Kugler J, Mazurczac M, Flynn P, Gross H, Pajon E, Jaeckle K, Galanis E, Badruddoja MA, Pazzi MA, Stea B, Lefferts P, Contreras N, Bishop M, Seeger J, Carmody R, Rance N, Marsella M, Schroeder K, Sanan A, Swinnen LJ, Rankin C, Rushing EJ, Hutchins LF, Damek DM, Barger GR, Norden AD, Lesser G, Hammond SN, Drappatz J, Fadul CE, Batchelor TT, Quant EC, Beroukhim R, Ciampa A, Doherty L, LaFrankie D, Ruland S, Bochacki C, Phan P, Faroh E, McNamara B, David K, Rosenfeld MR, Wen PY, Hammond SN, Norden AD, Drappatz J, Phuphanich S, Reardon D, Wong ET, Plotkin SR, Lesser G, Mintz A, Raizer JJ, Batchelor TT, Quant EC, Beroukhim R, Kaley TJ, Ciampa A, Doherty L, LaFrankie D, Ruland S, Smith KH, Wen PY, Chamberlain MC, Graham C, Mrugala M, Johnston S, Kreisl TN, Smith P, Iwamoto F, Sul J, Butman JA, Fine HA, Westphal M, Heese O, Warmuth-Metz M, Pietsch T, Schlegel U, Tonn JC, Schramm J, Schackert G, Melms A, Mehdorn HM, Seifert V, Geletneky K, Reuter D, Bach F, Khasraw M, Abrey LE, Lassman AB, Hormigo A, Nolan C, Gavrilovic IT, Mellinghoff IK, Reiner AS, DeAngelis L, Omuro AM, Burzynski SR, Weaver RA, Janicki TJ, Burzynski GS, Szymkowski B, Acelar SS, Mechtler LL, O'Connor PC, Kroon HA, Vora T, Kurkure P, Arora B, Gupta T, Dhamankar V, Banavali S, Moiyadi A, Epari S, Merchant N, Jalali R, Moller S, Grunnet K, Hansen S, Schultz H, Holmberg M, Sorensen MM, Poulsen HS, Lassen U, Reardon DA, Vredenburgh JJ, Desjardins A, Janney DE, Peters K, Sampson J, Gururangan S, Friedman HS, Jeyapalan S, Constantinou M, Evans D, Elinzano H, O'Connor B, Puthawala MY, Goldman M, Oyelese A, Cielo D, Dipetrillo T, Safran H, Anan M, Seyed Sadr M, Alshami J, Sabau C, Seyed Sadr E, Siu V, Guiot MC, Samani A, Del Maestro R, Bogdahn U, Stockhammer G, Mahapatra AK, Venkataramana NK, Oliushine VE, Parfenov VE, Poverennova IE, Hau P, Jachimczak P, Heinrichs H, Schlingensiepen KH, Shibui S, Kayama T, Wakabayashi T, Nishikawa R, de Groot M, Aronica E, Vecht CJ, Toering ST, Heimans JJ, Reijneveld JC, Batchelor T, Mulholland P, Neyns B, Nabors LB, Campone M, Wick A, Mason W, Mikkelsen T, Phuphanich S, Ashby LS, DeGroot JF, Gattamaneni HR, Cher LM, Rosenthal MA, Payer F, Xu J, Liu Q, van den Bent M, Nabors B, Fink K, Mikkelsen T, Chan M, Trusheim J, Raval S, Hicking C, Henslee-Downey J, Picard M, Reardon D, Kaley TJ, Wen PY, Schiff D, Karimi S, DeAngelis LM, Nolan CP, Omuro A, Gavrilovic I, Norden A, Drappatz J, Purow BW, Lieberman FS, Hariharan S, Abrey LE, Lassman AB, Perez-Larraya JG, Honnorat J, Chinot O, Catry-Thomas I, Taillandier L, Guillamo JS, Campello C, Monjour A, Tanguy ML, Delattre JY, Franz DN, Krueger DA, Care MM, Holland-Bouley K, Agricola K, Tudor C, Mangeshkar P, Byars AW, Sahmoud T, Alonso-Basanta M, Lustig RA, Dorsey JF, Lai RK, Recht LD, Reardon DA, Paleologos N, Groves M, Rosenfeld MR, Meech S, Davis T, Pavlov D, Marshall MA, Sampson J, Slot M, Peerdeman SM, Beauchesne PD, Faure G, Noel G, Schmitt T, Kerr C, Jadaud E, Martin L, Taillandier L, Carnin C, Desjardins A, Reardon DA, Peters KB, Herndon JE, Kirkpatrick JP, Friedman HS, Vredenburgh JJ, Nayak L, Panageas KS, Deangelis LM, Abrey LE, Lassman AB. Ongoing Clinical Trials. Neuro Oncol 2010. [DOI: 10.1093/neuonc/noq116.s9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Wada M, Nagasawa H, Kawanami T, Kurita K, Daimon M, Kubota I, Kayama T, Kato T. Cystatin C as an index of cerebral small vessel disease: results of a cross-sectional study in community-based Japanese elderly. Eur J Neurol 2009; 17:383-90. [PMID: 19832902 DOI: 10.1111/j.1468-1331.2009.02809.x] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
BACKGROUND AND PURPOSE Recent studies have shown that kidney dysfunction is associated with cerebral small vessel disease (SVD). Although creatinine-based estimating equations have been used as the standard measure for the evaluation of kidney function, the accuracy of these is limited in the elderly because of muscle mass decrease with aging. Cystatin C is a more useful measurement than creatinine-based estimating equations for evaluating kidney function, however, the relationship amongst cystatin C, cognitive dysfunction, and cerebral SVD has not been fully examined in community-based elderly. METHODS We performed a cross-sectional study using MRI to determine the relationship amongst cystatin C, cognitive function, and cerebral SVD in a total of 604 community-based Japanese elderly. RESULTS In this study, subjects with higher cystatin C levels tended to have more lacunas and higher grades of white matter lesions. Although a decline of the Mini-Mental State Examination (MMSE) scores was associated with SVD-related lesions, the relationship between the tertiles of cystatin C and mean MMSE scores was not statistically significant. In the logistic regression analysis, the association between cystatin C and SVD-related lesions was statistically significant, even after adjustment for conventional risk factors and high-sensitivity C-reactive protein. Furthermore, subjects with higher cystatin C levels accompanied with albuminuria had a greater risk for the presence of subclinical cerebral SVD than those with lower cystatin C levels without albuminuria. CONCLUSIONS The present study suggests that there is a close relationship between cystatin C and subclinical cerebral SVD, independently of conventional risk factors, in community-based elderly.
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Affiliation(s)
- M Wada
- Department of Neurology, Hematology, Metabolism, Endocrinology, and Diabetology, Faculty of Medicine, Yamagata University, Iida-Nishi, Yamagata, Japan.
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Tanabe Y, Kawasaki R, Wang JJ, Wong TY, Mitchell P, Daimon M, Oizumi T, Kato T, Kawata S, Kayama T, Yamashita H. Angiotensin-converting enzyme gene and retinal arteriolar narrowing: the Funagata Study. J Hum Hypertens 2009; 23:788-93. [PMID: 19369957 PMCID: PMC2834325 DOI: 10.1038/jhh.2009.27] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The purpose of this study is to determine whether the angiotensin-converting enzyme (ACE) gene polymorphism is associated with retinal arteriolar narrowing, a subclinical marker of chronic hypertension. The Funagata Study examined a population-based sample of Japanese aged 35+ years; 368 participants had both retinal vessel diameter measurements and ACE insertion/deletion (ACE I/D) polymorphism analyses performed. Assessment of retinal vessel diameter and retinal vessel wall signs followed the protocols used in the Blue Mountains Eye Study. ACE gene polymorphisms D/D, I/D and I/I were present in 34 (9.2%), 170 (46.2%) and 164 (44.5%) participants, respectively, distributed in Hardy-Weinberg equilibrium. After multivariable adjustment, retinal arteriolar diameter was significantly narrower in subjects with the D/D genotype compared to subjects with I/D and I/I genotypes (mean difference -6.49 microm, 95% confidence interval (CI): -12.86 microm, -0.11 microm). Our study suggests that the ACE I/D polymorphism may be associated with subclinical structural arteriolar changes related to chronic hypertension.
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Affiliation(s)
- Y Tanabe
- Department of Ophthalmology and Visual Science, Yamagata University, Yamagata, Japan
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Sakamoto Y, Matsunaga S, Okumura K, Kayama T, Yamazaki K, Takahashi N, Tanaka T, Kizaki Y, Motohiro T, Shinjoh H. Comparison between the NOx release–reduction reaction for Pt/Ba/Al2O3 and Pt/K/Al2O3 on a millisecond time scale. Chem Eng Sci 2008. [DOI: 10.1016/j.ces.2007.08.059] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Wakabayashi T, Kayama T, Nishikawa R, Takahashi H, Yoshimine T, Hashimoto N, Aoki T, Kurisu K, Natsume A, Ogura M, Yoshida J. A Multicenter Phase I Trial of Interferon- and Temozolomide Combination Therapy for High-grade Gliomas (INTEGRA Study). Jpn J Clin Oncol 2008; 38:715-8. [DOI: 10.1093/jjco/hyn095] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Kawasaki R, Wang JJ, Wong TY, Kayama T, Yamashita H. Impaired glucose tolerance, but not impaired fasting glucose, is associated with retinopathy in Japanese population: the Funagata study. Diabetes Obes Metab 2008; 10:514-5. [PMID: 18462198 DOI: 10.1111/j.1463-1326.2007.00824.x] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Kawasaki R, Tielsch JM, Wang JJ, Wong TY, Mitchell P, Tano Y, Tominaga M, Oizumi T, Daimon M, Kato T, Kawata S, Kayama T, Yamashita H. The metabolic syndrome and retinal microvascular signs in a Japanese population: the Funagata study. Br J Ophthalmol 2007; 92:161-6. [PMID: 17965107 DOI: 10.1136/bjo.2007.127449] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
AIMS To determine the relationship of metabolic syndrome and its components with retinopathy and other retinal microvascular signs in a Japanese population. METHODS The Funagata study recruited 1961 (53.3% of eligible) Japanese aged 35 or older. The metabolic syndrome was diagnosed primarily using definitions of the International Diabetes Federation. Retinopathy and retinal microvascular signs were assessed from fundus photographs. Retinal arteriolar and venular diameters were measured using a computer-assisted programme. RESULTS Data were available for analysis in 1638 persons for retinopathy and retinal microvascular signs and 921 persons for retinal vessel diameters. Various components of the metabolic syndrome were associated with retinal microvascular signs: a larger waist circumference was associated with wider venular diameter and retinopathy lesions; a higher blood pressure level was associated with focal arteriolar narrowing, arteriovenous nicking, enhanced arteriolar wall reflex and narrower arteriolar diameter; and a higher triglyceride level was associated with enhanced arteriolar wall reflex. Overall, persons with the metabolic syndrome were more likely to have retinopathy (odds ratio 1.64, 95% CI: 1.02 to 2.64) and wider venular diameter 4.69 microm (95% CI: 1.20 to 8.19 microm) than persons without the metabolic syndrome. CONCLUSION We report associations of metabolic syndrome components with retinopathy and wider venular diameter in Japanese adults. These data suggest that metabolic abnormalities, indicated by metabolic syndrome components, are associated with microvascular changes in the retina. There was no synergistic effect of the metabolic syndrome on retinal microvascular changes beyond its individual components.
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Affiliation(s)
- R Kawasaki
- Department of Ophthalmology and Visual Science, Yamagata University Faculty of Medicine, Yamagata, Japan.
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22
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Sakurada K, Sato S, Sonoda Y, Kokubo Y, Saito S, Kayama T. Surgical resection of tumors located in subcortex of language area. Acta Neurochir (Wien) 2007; 149:123-9; discussion 129-30. [PMID: 16990990 DOI: 10.1007/s00701-006-0857-7] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2004] [Accepted: 07/26/2006] [Indexed: 10/24/2022]
Abstract
OBJECT Although functional mapping facilitates the planning of surgery in and around eloquent areas, the resection of tumors adjacent to language areas remains challenging. In this report, we took notice that the language areas (Broca's and Wernicke's) present at the perisylvian fissure. We posit that if there is non-essential language area on the inner surface of the Sylvian fissure, safe tumor resection may be possible even if the tumor is located under the language cortex. METHODS The study population consisted of 5 patients with intrinsic brain tumors (frontal glioma, n = 3; temporal cavernous angioma, n = 1; primary malignant central nervous system lymphoma, n = 1) located in the perisylvian subcortex, in the language-dominant hemisphere. All patients underwent awake surgery and we performed intra-operative bipolar cortical functional language mapping. When the tumor was located under the language area, the Sylvian fissure was opened and the inner surface of the opercular cortex was exposed with the patient asleep, and additional functional mapping of that cortex was performed. This enabled us to remove the tumor from the non-functioning cortex. In our series, 4 of 5 patients had not language function on the inner surface of the operculum. Only one patient, a 52-year-old man with frontal glioblastoma (Case 3) had language function on the inner surface of the frontal operculum. CONCLUSION We suggest that even perisylvian tumors located in the subcortex of the language area may be resectable via the nonfunctioning intrasylvian cortex by a transopercular approach without resultant language dysfunction.
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Affiliation(s)
- K Sakurada
- Department of Neurosurgery, Yamagata University, School of Medicine, Yamagata, Japan
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23
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Abstract
BACKGROUND The incidence of brain tumors in elderly patients is increasing. It has become possible to treat meningiomas in the elderly by several modalities. We developed a successful multimodal strategy to treat these patients. METHODS We registered 35 patients with meningiomas. Symptomatic meningiomas were treated surgically at the time of diagnosis (n=19). Of the 16 asymptomatic meningiomas, 5 were removed at the time of diagnosis. The other asymptomatic meningiomas (n=11) were treated conservatively and when the tumors increased in size, surgical treatment was considered. "Operated" patients with residual or recurrent tumors underwent radiosurgery with a gamma knife. FINDINGS Surgical mortality and morbidity were 4% and 16%, respectively. Of the 25 "operated" patients, 21 (84.0%) had a good Karnofsky scale (> or =80%) at discharge. In all but two of the 11 patients with asymptomatic, conservatively treated meningiomas, the tumors did not increase during the follow-up period. Gamma knife radiosurgery, performed to treat 3 residual and 1 recurrent tumor, resulted in very good tumor control and none of the tumors increased after gamma knife surgery. CONCLUSIONS Meningiomas in elderly patients require a multimodal approach. Our strategy, which includes surgery, radiosurgery, and conservative treatment, resulted in good tumor control and made it possible for patients to pursue their activities of daily life.
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Affiliation(s)
- Y Sonoda
- Department of Neurosurgery, Yamagata University School of Medicine, Yamagata, Japan
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24
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Abstract
Background and Purpose—
No large-scale study has ever compared the clinical and radiological features of lateral medullary infarction (LMI) and medial medullary infarction (MMI). The aim of this study was to investigate them through the use of cooperatively collected cases.
Methods—
Medical information on all patients from 1996 to 2000 with medullary infarction (MI) proven by brain MR images at 35 stroke centers in the Tohoku district, Japan, was collected, and their clinical and radiological features were analyzed.
Results—
A total of 214 cases of MI were registered. They included 167 cases (78%) of LMI, 41 (19%) of MMI, and 6 (3%) of LMI plus MMI. The mean age of onset and the male-to-female ratio were 60.7 years and 2.7:1 in LMI and 65.0 years and 3.6:1 in MMI, respectively. The middle medulla was most frequently affected in LMI, and the upper medulla was most frequently affected in MMI. Dissection of the vertebral artery was observed in 29% of LMI and 21% of MMI. Prognosis, assessed by the Barthel Index, was favorable in both LMI and MMI. Diabetes mellitus was more frequently associated with MMI than with LMI.
Conclusions—
The present study surveyed a large number of MI cases and revealed that (1) the mean age of onset of MMI is higher than that of LMI, (2) the dissection of the vertebral artery is an important cause not only of LMI but also of MMI, and (3) diabetes mellitus is frequently associated with MMI.
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Affiliation(s)
- W Kameda
- Third Department of Internal Medicine, Yamagata University School of Medicine, Yamagata, Japan
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25
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Abstract
The present status of endoscopic transsphenoidal surgery is introduced and reviewed. The difference between endoscopic and microscopic transsphenoidal surgery is explained and also the characteristics of the transnostril approach is mentioned. The advantages of endoscopic surgery are (1) good anatomical orientation with wider view, (2) tumors at the dead angle can be removed under the direct visualization, and (3) the patients can drink, eat and even brush their teeth just after surgery. Short hospital stay and even day-surgery could be possible when a patient is carefully selected. The disadvantages and the limitation of endoscopic surgery have been solved and improved with several new instruments and ideas. Moreover, we have made use of the surgical simulation with the three-dimensional (3-D) CT virtual navigation endoscopic image and the navigation system with the ENT application and the SureTrak of the Stealth Station. There is no need for head fixation with a Mayfield clamp or a C-arm intraoperative fluoroscopic image. This image guidance enabled a correct and smooth approach even in those patients with complicated and abnormal anatomical structures by prior surgery such as for sinusitis. The sellar floor can be safely and correctly opened even in patients with conchal type sphenoid sinus using a navigation system that helps to understand the locations of the cavernous sinus and the internal carotid arteries. The overall result by endoscopic transsphenoidal surgery is as good as or better than that by the traditional microscopic transsphenoidal surgery.
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Affiliation(s)
- A Kuroki
- Department of Neurosurgery, Yamagata University School of Medicine, 2-2-2 Iida-nishi, Yamagata 990-9585, Japan.
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26
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Nagahata H, Kawai K, Higuchi H, Miki W, Kayama T. Prototheca Zopfii? Mastitis in Holstein Dairy Herds and Its Characteristics of Insufficient Elimination from the Udder. Acta Vet Scand 2003. [DOI: 10.1186/1751-0147-44-s1-p19] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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27
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Kimura H, Kurimura M, Wada M, Kawanami T, Kurita K, Suzuki Y, Katagiri T, Daimon M, Kayama T, Kato T. Female preponderance of Parkinson's disease in Japan. Neuroepidemiology 2002; 21:292-6. [PMID: 12411732 DOI: 10.1159/000065527] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
A male preponderance of Parkinson's disease (PD) has been reported in European countries and the USA. To verify this issue in Japanese patients with PD, we examined the age- and gender-specific prevalence of PD in Yamagata Prefecture (population 1,244,040), Japan. The prevalence of PD was 61.3/100,000 men and 91.0/100,000 women, showing that women were significantly more affected by PD than men (p < 0.001). Contrary to the findings in Europe and the USA, the results indicate a female preponderance of PD among the Japanese population.
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Affiliation(s)
- H Kimura
- Third Department of Internal Medicine, Yamagata University School of Medicine, Yamagata, Japan
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28
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Endoh H, Kato N, Fujii S, Suzuki Y, Sato S, Kayama T, Kotake Y, Yoshimura T. Spin trapping agent, phenyl N-tert-butylnitrone, reduces nitric oxide production in the rat brain during experimental meningitis. Free Radic Res 2001; 35:583-91. [PMID: 11767416 DOI: 10.1080/10715760100301591] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.0] [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: 10/24/2022]
Abstract
Phenyl N-tert-butylnitrone (PBN) is a spin trapping agent previously shown to exert a neuroprotective effect in infant rat brain during bacterial meningitis. In the present study, we investigated the effect of systemic PBN administration on nitric oxide (NO) production in a rat model of experimental meningitis induced by lipopolysaccharide (LPS). We assessed the NO concentration in rat brain tissues with an electron paramagnetic resonance (EPR) NO trapping technique. In this model, rats receiving intracisternal LPS administration showed symptoms of meningitis and cerebrospinal fluid (CSF) pleocytosis. The time course study indicated that the concentration of NO in the brain reached the maximum level 8.5 h after injection of LPS, and returned to the control level 24 h after the injection. When various doses of PBN (125-400 mg/kg) were injected intraperitoneally 30 min prior to LPS, NO production in the brain was reduced with increasing PBN dose (250 mg/kg suppressed 80% at 8.5 h after LPS injection), and white blood cells (WBC) in CSF were significantly decreased. We concluded that reduction of NO generation during bacterial meningitis contributes to the neuroprotective effect of PBN in addition to its possible direct scavenging of reactive oxygen intermediate (ROI).
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Affiliation(s)
- H Endoh
- Institute for Life Support Technology, Yamagata Public Corporation for the Development of Industry, 2-2-1 Matsuei, Yamagata 990-2473, Japan
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29
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Kayama T. [Anaplastic (malignant) ependymoma]. Ryoikibetsu Shokogun Shirizu 2001:41-3. [PMID: 11043175] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/18/2023]
Affiliation(s)
- T Kayama
- Department of Neurosurgery, Yamagata University School of Medicine
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30
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Kayama T. [Myxopapillary ependymoma]. Ryoikibetsu Shokogun Shirizu 2001:44-6. [PMID: 11043176] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/18/2023]
Affiliation(s)
- T Kayama
- Department of Neurosurgery, Yamagata University School of Medicine
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31
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Kayama T. [Ependymoma]. Ryoikibetsu Shokogun Shirizu 2001:37-40. [PMID: 11043174] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/18/2023]
Affiliation(s)
- T Kayama
- Department of Neurosurgery, Yamagata University School of Medicine
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32
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Kayama T. [Subependymoma]. Ryoikibetsu Shokogun Shirizu 2001:47-9. [PMID: 11043177] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/18/2023]
Affiliation(s)
- T Kayama
- Department of Neurosurgery, Yamagata University School of Medicine
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33
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Sakurada K, Furukawa T, Kato Y, Kayama T, Huang S, Horii A. RIZ, the retinoblastoma protein interacting zinc finger gene, is mutated in genetically unstable cancers of the pancreas, stomach, and colorectum. Genes Chromosomes Cancer 2001. [PMID: 11135439 DOI: 10.1002/1098-2264(2000)9999:9999<::aid-gcc1080>3.0.co;2-v] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
The retinoblastoma protein interacting zinc finger (RIZ) gene is a candidate tumor suppressor gene on 1p36, a region frequently rearranged in a wide variety of human tumors. As the RIZ gene harbors several microsatellites within its coding region, it is a candidate for an inactivating mutation in microsatellite instability (MSI) mediated carcinogenesis. In this study, we examined mutations of two poly adenine tracts, A(8) and A(9), within the coding region of the RIZ gene, in MSI-high (MSI-H) primary cancers occurring in the pancreas, stomach, and colorectum. Frameshift mutations were found in one (10%) of 10 pancreatic, four (36%) of 11 gastric, and two (25%) of eight colorectal cancers. These results indicate that mutations of the RIZ gene play an important role in the pathogenesis of some MSI-H cancers.
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Affiliation(s)
- K Sakurada
- Department of Molecular Pathology, Tohoku University School of Medicine, Sendai, Japan
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34
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Kayama T, Sato S. [Definition of individual language related area by awake surgery]. No To Shinkei 2001; 53:151-60. [PMID: 11268579] [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)
- T Kayama
- Department of Neurosurgery, Yamagata University School of Medicine, 2-2-2 Iidanishi, Yamagata 990-9585, Japan
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35
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Tsuchiya D, Kayama T, Kuchiki H, Sato S, Saito S. [A case of olfactory neuroblastoma with intracranial extension and distant metastasis]. No To Shinkei 2000; 52:811-6. [PMID: 11064869] [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: 02/18/2023]
Abstract
Olfactory neuroblastoma is a rare tumor originating in the upper nasal cavity. It rarely extends intracranially. We report a clinical case of olfactory neuroblastoma with intracranial extension and distant metastasis. A 35-year-old man complained of nasal stuffiness and bleeding, headache and vomiting. Neurological examination showed anosmia and papilledema. MRI showed a huge mass that occupied the right nasal and paranasal cavities, and extended into the right frontal base. The tumor was removed totally and was histologically diagnosed as olfactory neuroblastoma. About two months after surgery, however, MRI demonstrated a rapid recurrence of the tumor in the nasal and paranasal cavities and the frontal lobe. Metastatic lesions were also seen in the right cervical lymph nodes. Chemotherapy was administered using cisplatin and etoposide. The tumor in the frontal lobe shrunk markedly but the other lesion persisted. Whole brain irradiation and local irradiation of the cervical lymph nodes were performed. The tumors became smaller but did not disappear. MRI demonstrated spinal dissemination. Irradiation of the whole spinal cord was performed. The metastatic lesions disappeared. The patient was discharged without neurological deficits, but died of pneumonia 15 months after surgery. Olfactory neuroblastoma is a slow-growing tumor and is highly radiosensitive, but it rarely extends or develops multiple distant metastases and seldom shows a short survival time, as in our case. A review of the literature documented responses in patients treated with a cisplatin-based drug combination. We recommend systemic control using cisplatin-based chemotherapy in addition to irradiation to prevent local recurrence in cases of advanced or metastatic olfactory neuroblastoma.
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Affiliation(s)
- D Tsuchiya
- Department of Neurosurgery, Yamagata University School of Medicine, Japan
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36
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Mouri W, Kayama T, Sakurada K, Sato S, Saino M, Nakazato Y. [A case of giant skull myofibroma occupying left anterior cranial fossa]. No To Shinkei 2000; 52:821-6. [PMID: 11064871] [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: 02/18/2023]
Abstract
We report a rare case of giant skull myofibroma occupying left anterior cranial fossa. A 53-year-old woman presented with left exophthalmos for 2 years. Neurological examination showed left exophthalmos, disturbance of bilateral visual acuity, and bitemporal hemianopsia. A CT scan revealed an ossifing mass at left anterior cranial fossa. On magnetic resonance images, the tumor showed iso-intensity on T 1-weighted image, heterogeneous high intensity on T 2-weighted image, and was heterogeneously well-enhanced after administration of Gd-DTPA. The tumor was fed mainly by middle meningeal artery. The patient underwent surgery and the tumor was removed totally. Histological diagnosis of the tumor was myofibroma. The patient has been followed every other month by MRI without any adjuvant therapy. There has been no tumor recurrence for 19 months. There is no other myofibroma in her body, therefore the patient was diagnosed as solitary myofibroma of the skull. Our case is the first report of solitary myofibroma of the skull because we could not find any reports on solitary myofibroma of the skull in the past literature.
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Affiliation(s)
- W Mouri
- Department of Neurosurgery, Yamagata University School of Medicine
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37
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Chu GC, Katakura K, Tomita T, Zhang X, Sun D, Sato M, Sasahara M, Kayama T, Ikeda-Saito M, Yoshida T. Histidine 20, the crucial proximal axial heme ligand of bacterial heme oxygenase Hmu O from Corynebacterium diphtheriae. J Biol Chem 2000; 275:17494-500. [PMID: 10751393 DOI: 10.1074/jbc.m000830200] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
The hemin complex of Hmu O, a 24-kDa soluble heme degradation enzyme in Corynebacterium diphtheriae, is coordinated axially to a neutral imidazole of a proximal histidine residue in Hmu O. To identify which of the eight histidines in Hmu O is the proximal heme ligand, we have constructed and expressed the plasmids for eight His --> Ala Hmu O mutants. Reconstituted with hemin, the active site structures and enzymatic activity of these mutants have been examined by EPR, resonance Raman, and optical absorption spectroscopy. EPR of the NO-bound ferrous heme-Hmu O mutant complexes reveals His(20) as the proximal heme ligand in Hmu O, and this is confirmed by resonance Raman results from the ligand-free ferrous heme-H20A. All eight His --> Ala mutants bind hemin stoichiometrically, proving that none of the histidines is essential for hemin-Hmu O formation. However, His(20) is crucial to Hmu O catalysis. Its absence by point mutation has inhibited the conversion of hemin to biliverdin. The ferric heme-H20A complex is pentacoordinate. Resonance Raman of the CO-bound ferrous heme-H20A corroborates this and reveals an Fe-C-O bending mode, delta(Fe-C-O), the first reported for a pentacoordinate CO-bound hemeprotein. The appearance of delta(Fe-C-O) in C. diphtheriae Hmu O H20A but not mammalian HO-1 mutant H25A indicates that the heme environment between the two heme oxygenases is different.
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Affiliation(s)
- G C Chu
- Department of Biochemistry, the Central Laboratory for Research and Education, Yamagata University School of Medicine, Yamagata 990-9585, Japan
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Abstract
KRN8602 (MX2) is a newly developed morpholino anthracycline that crosses the blood-brain barrier where it becomes distributed in brain tissue after intravenous administration. This morpholino anthracycline has been found to be effective against human glioma cells and the intracerebrally transplanted tumors in vivo, We performed a phase II trial using KRN8602 as a single agent in malignant glioma patients who had not received prior adjuvant therapy. The 13 patients (5 glioblastomas, 7 anaplastic astrocytomas and 1 malignant oligodendroglioma) enrolled received at least 1 cycle of KRN8602 at 35 mg/m2/day in 3-4 week intervals by intravenous bolus. Ten of these patients could be evaluated for response, and 13 for toxicity. Three patients (1 glioblastoma and 2 anaplastic astrocytomas) demonstrated a complete response (3/10, 30%). Concerning side effects, myelosuppression was moderately severe, with 30.7% of patients developing grade 3 leukopenia. Severe nausea/vomiting was observed in 69% of the patients, however, cardiotoxicity was not observed. The results indicate that KRN8602 demonstrated modest activity against malignant glioma with relatively severe, but manageable toxicity. Further assessment of the efficacy and toxicity of KRN8602 against malignant glioma may be worthwhile.
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Affiliation(s)
- J I Kuratsu
- Department of Neurosurgery, Faculty of Medicine, Kagoshima University, Japan
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39
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Tsuchiya D, Kayama T, Saito S, Sato S. [Hemifacial spasm due to a compression of the facial nerve by a fusiform aneurysm of the vertebral artery: case report]. No To Shinkei 2000; 52:517-21. [PMID: 10875124] [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: 02/16/2023]
Abstract
We report a rare case of symptomatic hemifacial spasm caused by a fusiform vertebral artery aneurysm and by a branch of the anterior inferior cerebellar artery compressing the facial nerve at the root exit zone (REZ). A 71-year-old female had an 11-year history of right hemifacial spasm. MRIs demonstrated an aneurysm compressing the facial nerve at the REZ. Angiography disclosed a fusiform aneurysm of the right vertebral artery at the origin of the posterior inferior cerebellar artery. After the vertebral aneurysm was clipped distal to the origin of the posterior inferior cerebellar artery, a branch of the right anterior inferior cerebellar artery was also observed compressing the facial nerve at the REZ. Both the clipped aneurysm and the branch of the anterior inferior cerebellar artery were mobilized away from the REZ of the facial nerve, and a prosthesis was inserted between the branch of the anterior inferior cerebellar artery and the brain stem to keep the aneurysm away from its original position. The patient's hemifacial spasm immediately disappeared without any neurological deficits just after the surgery. Hemifacial spasm, especially caused by an aneurysm, is quite rare. In a review of the literature, we found only 4 cases of symptomatic hemifacial spasm caused by an aneurysm of the vertebral artery. This case is the first reported case of hemifacial spasm caused by both a fusiform vertebral artery aneurysm and a branch of the anterior inferior cerebellar artery compressing the facial nerve at the REZ.
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Affiliation(s)
- D Tsuchiya
- Department of Neurosurgery, Yamagata University School of Medicine, Japan
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40
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Kato N, Kayama T, Sakurada K, Saino M, Kuroki A. [Radiation induced glioblastoma: a case report]. No To Shinkei 2000; 52:413-8. [PMID: 10845210] [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: 04/14/2023]
Abstract
We report a surgical case of a 54-year-old woman with a radiation induced glioblastoma. At the age of 34, the patient was diagnosed to have a non-functioning pituitary adenoma. It was partially removed followed by 50 Gy focal irradiation with a 5 x 5 cm lateral opposed field. Twenty years later, she suffered from rapidly increasing symptoms such as aphasia and right hemiparesis. MRI showed a large mass lesion in the left temporal lobe as well as small mass lesions in the brain stem and the right medial temporal lobe. These lesions situated within the irradiated field. Magnetic resonance spectroscopy revealed relatively high lactate signal and decreased N-acetyl aspartate, choline, creatine and phosphocreatine signals. Increased lactate signal meant anaerobic metabolism that suggested the existence of a rapidly growing malignant tumor. Thus, we planned surgical removal of the left temporal lesion with the diagnosis of a radiation induced malignant glioma. The histological examination revealed a glioblastoma with radiation necrosis. MIB-1 staining index was 65%. Postoperatively, her symptoms improved, but she died from pneumonia 1 month after the surgery. An autopsy was obtained. The lesion of the left temporal lobe was found to have continuity to the lesion in the midbrain, the pons and the right temporal lobe as well. High MIB-1 staining index suggested that a radiation induced glioblastoma had high proliferative potential comparing with a de novo and a secondary glioblastoma.
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Affiliation(s)
- N Kato
- Department of Neurosurgery, Yamagata University School of Medicine, Japan
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41
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Affiliation(s)
- K Sakurada
- Department of Neurosurgery, Yamagata University School of Medicine, Yamagata, Japan
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42
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Kuge A, Kayama T, Tsuchiya D, Kawakami K, Saito S, Nakazato Y, Suzuki H. [Suprasellar primary malignant rhabdoid tumor in an adult: a case report]. No Shinkei Geka 2000; 28:351-8. [PMID: 10769834] [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: 02/16/2023]
Abstract
Malignant rhabdoid tumor (MRT), described for the first time in 1978 in the kidney, has rarely been reported in other organs including the brain and has involved adults in only 3 cases. We described a case of MRT in a 32-year-old woman who presented with severe headache, nausea and sudden onset of visual disturbance. MRI showed a well-enhanced mass at the suprasellar region. Subtotal removal of the tumor was performed. However, tumor regrowth occurred after the operation (doubling time, 8.36 days) and spinal dissemination was detected. Therefore, chemotherapy and radiotherapy were administered focusing on the suprasellar lesion and the spinal cord. Pathologically, light micrographs showed rhabdoid cells with large, round, single or double nuclei with one prominent nucleolus and eosinophilic cytoplasmic inclusions. Electron micrographs were made of typical rhabdoid cells displaying bundles of intermediate filaments within the perikaryon. In immunohistochemical studies, EMA, vimentin, cytokeratin and SMA were positive. Pathological findings were consistent with those of MRT. Optimal treatment for this tumor has not been established. Our case may be useful in defining treatment for MRT.
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Affiliation(s)
- A Kuge
- Department of Neurosurgery, Yamagata University School of Medicine, Japan
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Sakurada K, Kayama T, Kawakami K, Saino M, Sato S. [A successfully operated case of choriocarcinoma with recurrent intratumoral hemorrhage]. No Shinkei Geka 2000; 28:67-72. [PMID: 10642996] [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: 02/15/2023]
Abstract
A 12-year-old boy with primary intracranial choriocarcinoma of the pineal region suffered from repeated intratumoral hemorrhage over a short period. Neuroradiological images demonstrated a pineal-region tumor with intratumoral hemorrhage and obstructive hydrocephalus. HCG-beta subunit concentration of his serum and cerebrospinal fluid was abnormally high. After the 24.2Gy irradiation, the tumor was removed almost totally. After the operation, we treated him with additional radiation and chemotherapy using ifosfamide, cisplatin, and etoposide (namely ICE therapy). No recurrence or metastasis has been noted, and he was in good condition during the 22 months since the operation. At present he receives maintenance ICE therapy every 3 months. Choriocarcinoma involves a high possibility of intratumoral fatal hemorrhage, so a radical operation is recommended as soon as possible.
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Affiliation(s)
- K Sakurada
- Department of Neurosurgery, Yamagata University School of Medicine, Japan
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Kuchiki H, Saino M, Nobukuni T, Yasuda J, Maruyama T, Kayama T, Murakami Y, Sekiya T. Detection of amplification of a chromosomal fragment at 6p21 including the cyclin D3 gene in a glioblastoma cell line by arbitrarily primed polymerase chain reaction. Int J Cancer 2000; 85:113-6. [PMID: 10585593 DOI: 10.1002/(sici)1097-0215(20000101)85:1<113::aid-ijc20>3.0.co;2-3] [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: 11/07/2022]
Abstract
DNA from 10 human glioma cell lines was analyzed by arbitrarily primed polymerase chain reaction. By fingerprinting of the DNA fragments obtained, the presence of fragment Qx with an abnormal signal was detected in one of the glioblastoma cell lines, CCF-STTG1. The nucleotide sequence of this fragment of 387 base pairs showed no homology with any known sequences. Southern-blot analysis using Qx as a probe revealed that the abnormal signal was caused by amplification of DNA by about 50-fold. By analysis of radiation hybrid panels, the fragment was shown to be derived from a chromosomal region on 6p21. The cyclin D3 (ccnd3) gene and an EST locus, H40682, both of which were located in this region, were amplified by about 50-fold in this cell line. Two other loci, R75654 and M78872, flanking the Qx, CCND3 and H40682 loci, were not amplified, suggesting that the size of the amplicon was less than 62 cR. Since over-expression of the ccnd3 gene, but not the H40682 locus, was detected in the cell line CCF-STTG1, the increased amounts of cyclin D3 caused by gene amplification could be involved in the development and/or progression of this glioblastoma.
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Affiliation(s)
- H Kuchiki
- Oncogene Division, National Cancer Center Research Institute, Tokyo, Japan
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Takemura S, Sato S, Kuroki A, Saito S, Kayama T. [New ideas for indirect revascularization surgery for moyamoya disease]. No Shinkei Geka 1999; 27:987-92. [PMID: 10565041] [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: 02/14/2023]
Abstract
We had performed indirect revascularization surgery, mainly EMS, for cases with moyamoya disease, because EMS can revascularize a large area including the territory of anterior cerebral artery. However, in our initial cases, we found that three sides in two cases had post-operative ischemic complications. These cases suggested that intracranial hypertension due to pressure exerted by swelling caused by edema in the myoflap after EMS was one of the reasons for these infarctions. For the prevention of intracranial hypertension due to the edema in the myoflap, when we did EDAMS with dural pedicle insertion, we put into practice the new ideas about shaving the boneflaps to half of their original thickness, and prescribed 20% Mannitol after surgery. We tried these new ideas concerning treatment on four sides in three cases with moyamoya disease, and we were able to get good outcomes without any new neurological deficits.
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Affiliation(s)
- S Takemura
- Department of Neurosurgery, Yamagata University School of Medicine, Japan
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Utsunomiya A, Kinouchi H, Kayama T, Yoshimoto T. Distant metastasis of liposarcoma to the dura and skull: a case report. Br J Neurosurg 1999; 13:520-2. [PMID: 10627789] [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]
Abstract
A case of metastatic liposarcoma of both skull and brain originating from the lower extremity is described. A 44-year-old male underwent removal of a myxoid type liposarcoma in his left upper thigh and a second operation for local recurrence. A metastatic liposarcoma was also discovered in the mediastinum and treated by radiotherapy. Six years after the initial onset, he presented with progressive consciousness disturbance, motor aphasia, right hemiparesis and subcutaneous swelling in the left frontal region. Neuroimaging showed a large tumour extending both intracranially and extracranially across the eroded skull. The intracranial portion of the tumour had invaded the frontal lobe. The tumour was subtotally removed. The operative findings suggested that the tumour had metastasized to the dura mater or the skull initially, and invaded the surrounding tissues. The histological appearance was the same as those of the previous tumours.
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Affiliation(s)
- A Utsunomiya
- Department of Neurosurgery, Touhoku University School of Medicine, Sendai, Japan.
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Ohki M, Sato K, Tuchiya D, Sato S, Saito S, Kinjo T, Kayama T, Jokura H, Yoshimoto T. [A case of TSH-secreting pituitary adenoma associated with an unruptured aneurysm: successful treatment by two-stage operation and gamma-knife]. No To Shinkei 1999; 51:895-9. [PMID: 10553592] [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: 02/14/2023]
Abstract
We report a successfully treated case of invasive TSH-secreting pituitary adenoma associated with an unruptured internal carotid artery aneurysm by two-stage operation and gamma-knife radiosurgery. A 64-year-old woman was admitted to our department with a 3-year history of general fatigue and 1-year history of anxiety, palpitation and hyperhydrosis. Endocrinological examination revealed hyperthyroidism with elevated TSH, GH and somatomedin C. Magnetic resonance images demonstrated a tumor in the sella turcica which extended into the left cavernous sinus, furthermore, indicated aneurysm-like flow void at the ventral part of the left internal carotid artery. The aneurysm was confirmed by conventional angiography. Neck clipping of the aneurysm was performed through pterional approach as the first operation. One month later, at the second operation, the pituitary adenoma except for cavernous sinus portion was resected via the transsphenoidal approach. Immunohistological examination revealed positive for TSH and GH. Gamma-knife radiosurgery with a central dose of 33.3 Gy and peripheral dose of 17 Gy was carried out for residual tumor at the cavernous sinus under both MRI and CT guidance. Posttreatment course was uneventful with normalization of thyroid function at 16 months after gamma-knife. Two-stage operation and gamma-knife radiosurgery is effective for TSH-secreting adenoma extending into the cavernous sinus associated with an unruptured aneurysm.
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Affiliation(s)
- M Ohki
- Department of Neurosurgery, Yamagata University School of Medicine, Japan
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Kuroki A, Kayama T, Song J, Saito S. Removal of petrous apex meningioma and microvascular decompression for trigeminal neuralgia through the anterior petrosal approach. Case report. Neurol Med Chir (Tokyo) 1999; 39:447-51. [PMID: 10396120 DOI: 10.2176/nmc.39.447] [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: 11/20/2022] Open
Abstract
A 64-year-old female presented with right trigeminal neuralgia. Computed tomography and magnetic resonance (MR) imaging demonstrated a tumor attached to the right petrous apex. MR imaging also revealed that the trigeminal nerve was compressed and distorted by the tumor. Tumor removal and microvascular decompression (MVD) were performed via the anterior petrosal approach. The trigeminal nerve was distorted by the tumor and the superior cerebellar artery compressed the medial part of the root entry zone of the trigeminal nerve. The surgery resulted in complete relief of the trigeminal neuralgia. Posterior fossa tumors causing ipsilateral trigeminal neuralgia are not rare, and are often removed via the suboccipital retromastoid approach, as MVD for trigeminal neuralgia is usually performed through the retromastoid approach. The advantages of the anterior petrosal approach are shorter access to the lesion and direct exposure without interference from the cranial nerves, and that bleeding from the tumors is easily controlled as the feeding arteries can be managed in the early stage of the surgery. We conclude that the anterior petrosal approach is safe and advantageous for the removal of petrous apex tumor associated with trigeminal neuralgia.
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Affiliation(s)
- A Kuroki
- Department of Neurosurgery, Yamagata University School of Medicine
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Kuchiki H, Yasuda J, Kayama T, Murakami Y, Sekiya T. Detection of DNA abnormalities by arbitrarily primed PCR fingerprinting: amplification of the MDM2 gene in a mediastinum fibrosarcoma. Biochem Biophys Res Commun 1999; 258:271-7. [PMID: 10329377 DOI: 10.1006/bbrc.1999.0636] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Arbitrarily primed PCR (AP-PCR) fingerprinting method is easy and useful for analysis of genetic alterations in anonymous chromosomal regions. We applied this technology to analysis of DNA from human primary cancers and found amplification of a DNA fragment in a mediastinum fibrosarcoma. PCR-based analysis of radiation hybrid panels following cloning and nucleotide sequence determination of the fragment revealed that it was derived from a region of chromosome 12q13-q15. In this region, the MDM2 and IFNG genes were noted as known genes that could be involved in human carcinogenesis. Southern blot analysis of genomic DNA of the tumor revealed the amplification of the MDM2 gene together with the fragment locus, but not the IFNG gene. Our results demonstrated that detection of DNA alterations by AP-PCR fingerprinting without any previous knowledge of the genes and subsequent analysis of radiation hybrid panels could lead to easy identification of candidates for genes involved in carcinogenesis.
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Affiliation(s)
- H Kuchiki
- Oncogene Division, National Cancer Center Research Institute, 1-1, Tsukiji 5-chome, Chuo-ku, Tokyo, 104-0045, Japan
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Abstract
BACKGROUND AND PURPOSE We sought to determine the clinical and neuroradiological features of intracranial vertebrobasilar artery dissection. METHODS The clinical features and MR findings of 31 patients (20 men and 11 women) with intracranial vertebrobasilar artery dissections confirmed by vertebral angiography were analyzed retrospectively. The vertebral angiography revealed the double lumen sign in 11 patients (13 arteries) and the pearl and string sign in 20 patients (28 arteries). RESULTS The patients ranged in age from 25 to 82 years (mean, 54.8 years). Clinical symptoms due to ischemic cerebellar and/or brain stem lesions were common, but in 3 cases the dissections were discovered incidentally while an unrelated disorder was investigated. Headache, which has been emphasized as the only specific clinical sign of vertebrobasilar artery dissection, was found in 55% of the patients. Intramural hematoma on T1-weighted images has been emphasized as a specific MR finding. The positive rate of intramural hematoma was 32%. Double lumen on 3-dimensional (3-D) spoiled gradient-recalled acquisition (SPGR) images after the injection of contrast medium was identified in 87% of the patients. The 3-D SPGR imaging method is considered useful for the screening of vertebrobasilar artery dissection. CONCLUSIONS Intracranial vertebrobasilar artery dissection is probably much more frequent than previously considered. Such patients may present no or only minor symptoms. Neuroradiological screening for posterior circulation requires MR examinations, including contrast-enhanced 3-D SPGR. Angiography may be necessary for the definite diagnosis of intracranial vertebrobasilar artery dissection because the sensitivity of the finding of intramural hematoma is not satisfactory.
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Affiliation(s)
- T Hosoya
- Department of Radiology, Yamagata University School of Medicine, Japan.
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