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Huntington CM, Thomas AGR, McGuffey C, Matsuoka T, Chvykov V, Kalintchenko G, Kneip S, Najmudin Z, Palmer C, Yanovsky V, Maksimchuk A, Drake RP, Katsouleas T, Krushelnick K. Current filamentation instability in laser wakefield accelerators. PHYSICAL REVIEW LETTERS 2011; 106:105001. [PMID: 21469796 DOI: 10.1103/physrevlett.106.105001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2010] [Indexed: 05/30/2023]
Abstract
Experiments using an electron beam produced by laser-wakefield acceleration have shown that varying the overall beam-plasma interaction length results in current filamentation at lengths that exceed the laser depletion length in the plasma. Three-dimensional simulations show this to be a combination of hosing, beam erosion, and filamentation of the decelerated beam. This work suggests the ability to perform scaled experiments of astrophysical instabilities. Additionally, understanding the processes involved with electron beam propagation is essential to the development of wakefield accelerator applications.
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Takahara M, Shiraiwa T, Kaneto H, Yasuda T, Kuroda A, Sakamoto F, Naka T, Miyashita K, Sakamoto K, Matsuoka T, Shimomura I, Matsuhisa M. Improvement of psoriatic arthritis by pioglitazone treatment in a type 2 diabetic patient. Diabetes Res Clin Pract 2010; 90:e9-e10. [PMID: 20816261 DOI: 10.1016/j.diabres.2010.05.020] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/15/2010] [Accepted: 05/20/2010] [Indexed: 11/29/2022]
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Ueta M, Matsuoka T, Yokoi N, Kinoshita S. Prostaglandin E receptor subtype EP3 downregulates TSLP expression in human conjunctival epithelium. Br J Ophthalmol 2010; 95:742-3. [DOI: 10.1136/bjo.2010.188748] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Matsuoka T, Adair JE, Lih FB, Hsi LC, Rubino M, Eling TE, Tomer KB, Yashiro M, Hirakawa K, Olden K, Roberts JD. Elevated dietary linoleic acid increases gastric carcinoma cell invasion and metastasis in mice. Br J Cancer 2010; 103:1182-91. [PMID: 20842125 PMCID: PMC2967057 DOI: 10.1038/sj.bjc.6605881] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
BACKGROUND Dietary (n-6)-polyunsaturated fatty acids influence cancer development, but the mechanisms have not been well characterised in gastric carcinoma. METHODS We used two in vivo models to investigate the effects of these common dietary components on tumour metastasis. In a model of experimental metastasis, immunocompromised mice were fed diets containing linoleic acid (LA) at 2% (LLA), 8% (HLA) or 12% (VHLA) by weight and inoculated intraperitoneally (i.p.) with human gastric carcinoma cells (OCUM-2MD3). To model spontaneous metastasis, OCUM-2MD3 tumours were grafted onto the stomach walls of mice fed with the different diets. In in vitro assays, we investigated invasion and ERK phosphorylation of OCUM-2MD3 cells in the presence or absence of LA. Finally, we tested whether a cyclooxygenase (COX) inhibitor, indomethacin, could block peritoneal metastasis in vivo. RESULTS Both the HLA and VHLA groups showed increased incidence of tumour nodules (LA: 53%; HLA: 89%; VHLA: 100%; P<0.03); the VHLA group also displayed increased numbers of tumour nodules and higher total volume relative to LLA group in experimental metastasis model. Both liver invasion (78%) and metastasis to the peritoneal cavity (67%) were more frequent in VHLA group compared with the LLA group (22% and 11%, respectively; P<0.03) in spontaneous metastasis model. We also found that the invasive ability of these cells is greatly enhanced when exposed to LA in vitro. Linoleic acid also increased invasion of other scirrhous gastric carcinoma cells, OCUM-12, NUGC3 and MKN-45. Linoleic acid effect on OCUM-2MD3 cells seems to be dependent on phosphorylation of ERK. The data suggest that invasion and phosphorylation of ERK were dependent on COX. Indomethacin decreased the number of tumours and total tumour volume in both LLA and VHLA groups. Finally, COX-1, which is known to be an important enzyme in the generation of bioactive metabolites from dietary fatty acids, appears to be responsible for the increased metastatic behaviour of OCUM-2MD3 cells in the mouse model. CONCLUSION Dietary LA stimulates invasion and peritoneal metastasis of gastric carcinoma cells through COX-catalysed metabolism and activation of ERK, steps that compose pathway potentially amenable to therapeutic intervention.
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Matsuoka T, Makino T, Noritake K, Shimomura K, Sanbuissho A. Expression of Sphingosine 1-phosphate receptor S1p1/EDG-1 during rat limb development. Reprod Toxicol 2010. [DOI: 10.1016/j.reprotox.2010.05.069] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Tamaki H, Matsuoka T, Yasuda Y, Hanada S, Kamagata Y, Nakamura K, Sakasegawa SI. A novel laccase with urate oxidation activity from Lysobacter sp. T-15. J Biochem 2010; 148:481-9. [DOI: 10.1093/jb/mvq081] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Matsuoka T, McGuffey C, Cummings PG, Horovitz Y, Dollar F, Chvykov V, Kalintchenko G, Rousseau P, Yanovsky V, Bulanov SS, Thomas AGR, Maksimchuk A, Krushelnick K. Stimulated Raman side scattering in laser wakefield acceleration. PHYSICAL REVIEW LETTERS 2010; 105:034801. [PMID: 20867770 DOI: 10.1103/physrevlett.105.034801] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/11/2010] [Indexed: 05/29/2023]
Abstract
Stimulated Raman side scattering of an ultrashort high power laser pulse is studied in experiments on laser wakefield acceleration. Experiments and simulations reveal that stimulated Raman side scattering occurs at the beginning of the interaction, that it contributes to the evolution of the pulse prior to wakefield formation, and also that it affects the quality of electron beams generated. The relativistic shift of the plasma frequency is measured.
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Litzenberg D, Dollar F, Bulanov S, Brantov A, Bychenkov V, Chvykov V, Kalintchenko G, Matsuoka T, McGuffey C, Yanovsky V, Krushelnick K, Maksimchuk A. SU-GG-T-462: Observation of Quasi-Monoenergetic Laser Accelerated Proton and Carbon Beams. Med Phys 2010. [DOI: 10.1118/1.3468860] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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Matsuoka T, Kobayashi S, Oka K, Sakano H, Kawano K, Katoh T. [Thymic cancer with superior vena cava invasion reconstructed by ready-made Y-graft]. KYOBU GEKA. THE JAPANESE JOURNAL OF THORACIC SURGERY 2010; 63:379-381. [PMID: 20446606] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
A 57-year-old woman was admitted to our hospital with a complaint of left supraclavicular lymph node's swelling in January 2007. Computed tomography (CT) showed the lobulated tumor suspected of superior vena cava (SVC) invasion, located in the anterior mediastinum, 5 x 3 cm in size. The patient underwent thymectomy, resection of SVC, and partial resection of the right upper lobe. SVC was reconstructed by ready-made Y-graft (Hemashied phi 18 x 9 mm). Histopathological diagnosis was thymic cancer, poorly differentiated squamous cell carcinoma. The patient was discharged on 21st postoperative day. Postoperative radiotherapy (RT : 12.6 Gy) was canceled for the side effect. Alternatively, adjuvant chemotherapy [carboplatin (CBDCA) +paclitaxel (PTX)] was administered. Additional RT (50 Gy) was given to the lesion of local recurrence 1 and half year after the operation. The patient was alive without any signs of recurrence after RT. Left side bypass graft was patent at 8 months postoperatively, but was obliterated thereafter. Right side bypass is patent at more than 2 years postoperatively. Ready-made Y-graft can be one of the choices of SVC reconstruction.
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Dong P, Reed SA, Yi SA, Kalmykov S, Shvets G, Downer MC, Matlis NH, Leemans WP, McGuffey C, Bulanov SS, Chvykov V, Kalintchenko G, Krushelnick K, Maksimchuk A, Matsuoka T, Thomas AGR, Yanovsky V. Formation of optical bullets in laser-driven plasma bubble accelerators. PHYSICAL REVIEW LETTERS 2010; 104:134801. [PMID: 20481887 DOI: 10.1103/physrevlett.104.134801] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/03/2009] [Indexed: 05/29/2023]
Abstract
Electron density bubbles--wake structures generated in plasma of density n(e) approximately 10(19) cm(-3) by the light pressure of intense ultrashort laser pulses--are shown to reshape weak copropagating probe pulses into optical "bullets." The bullets are reconstructed using frequency-domain interferometric techniques in order to visualize bubble formation. Bullets are confined in three dimensions to plasma-wavelength size, and exhibit higher intensity, broader spectrum and flatter temporal phase than surrounding probe light, evidence of their compression by the bubble. Bullets observed at 0.8 approximately < n(e) approximately < 1.2x10(19) cm(-3) provide the first observation of bubble formation below the electron capture threshold. At higher n(e), bullets appear with high shot-to-shot stability together with relativistic electrons that vary widely in spectrum, and help relate bubble formation to fast electron generation.
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Kawai S, Ogawa M, Ishibashi K, Kondo Y, Matsuoka T, Homma T, Fukunaka Y, Kida S. Transient mass transfer rate of Cu2+ ion caused by copper electrodeposition with alternating electrolytic current. Electrochim Acta 2010. [DOI: 10.1016/j.electacta.2010.02.039] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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McGuffey C, Thomas AGR, Schumaker W, Matsuoka T, Chvykov V, Dollar FJ, Kalintchenko G, Yanovsky V, Maksimchuk A, Krushelnick K, Bychenkov VY, Glazyrin IV, Karpeev AV. Ionization induced trapping in a laser wakefield accelerator. PHYSICAL REVIEW LETTERS 2010; 104:025004. [PMID: 20366605 DOI: 10.1103/physrevlett.104.025004] [Citation(s) in RCA: 73] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2009] [Indexed: 05/29/2023]
Abstract
Experimental studies of electrons produced in a laser wakefield accelerator indicate trapping initiated by ionization of target gas atoms. Targets composed of helium and controlled amounts of various gases were found to increase the beam charge by as much as an order of magnitude compared to pure helium at the same electron density and decrease the beam divergence from 5.1+/-1.0 to 2.9+/-0.8 mrad. The measurements are supported by particle-in-cell modeling including ionization. This mechanism should allow generation of electron beams with lower emittance and higher charge than in preionized gas.
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Uehara T, Matsuoka T, Sumiyoshi T, Itoh H, Muranaka Y, Matsui M, Suzuki M. PW01-92 - Essential polyunsaturated fatty acids and behavioral and cognitive symptoms in Alzheimer's disease. Eur Psychiatry 2010. [DOI: 10.1016/s0924-9338(10)71491-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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Yashiro M, Shinto O, Nakamura K, Tendo M, Matsuoka T, Matsuzaki T, Kaizaki R, Ohira M, Miwa A, Hirakawa K. Effects of VEGFR-3 phosphorylation inhibitor on lymph node metastasis in an orthotopic diffuse-type gastric carcinoma model. Br J Cancer 2009; 101:1100-6. [PMID: 19738610 PMCID: PMC2768106 DOI: 10.1038/sj.bjc.6605296] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
BACKGROUND Vascular endothelial growth factor receptor-3 (VEGFR-3) signalling mediates lymphangiogenesis and lymphatic invasion; however, the effect of VEGFR-3 inhibition on the lymph node (LN) metastasis remains unclear. The aim of this study is to clarify the benefit of a VEGFR-3 inhibitor Ki23057 for LN metastasis. METHODS Ki23057 was administered orally to gastric cancer models created by orthotopic inoculation of diffuse-type gastric cancer cells, OCUM-2MLN. The effects of Ki23057 on lymphatic vessel invasion, lymphatic vessel density, and VEGFR-3 phosphorylation were examined by immunostaining or immunoblotting. RESULTS Ki23057 inhibited the autophosphorylation of VEGFR-3, with IC50 values of 4.3 nM in the cell-free kinase assay. Murine gastric cancer models created by the orthotopic inoculation of OCUM-2MLN cells showed the diffusely infiltrating growth and frequently developed LN metastasis. The oral administration of Ki23057 significantly (P<0.01) reduced the size of orthotopic tumours and the number of the metastatic LN in gastric cancer models. The degree of lymphatic invasion and lymphangiogenesis was significantly (P<0.05) lower in the gastric tumours treated by Ki23057. Ki23057 inhibited the phosphorylation of VEGFR-3 of lymphatic endothelial cells in gastric tumours. CONCLUSION The inhibition of lymphangiogenesis targeting VEGFR-3 phosphorylation is a therapeutic strategy for inhibiting LN metastasis of diffuse-type gastric cancer.
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Matsushita T, Isobe N, Matsuoka T, Ishizu T, Kawano Y, Yoshiura T, Ohyagi Y, Kira J. Extensive vasogenic edema of anti-aquaporin-4 antibody-related brain lesions. Mult Scler 2009; 15:1113-7. [DOI: 10.1177/1352458509106613] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Objective Using neuroimaging, we analyzed the nature of extensive brain lesions in five anti-aquaporin-4 (AQP4) antibody-positive patients with neuromyelitis optica spectrum disorders. Results Extensive brain lesions involved white matter in three, and basal ganglia and corpus callosum in one each. Four patients showed high diffusivity on apparent diffusion coefficient maps and three demonstrated increased choline/creatine ratios and decreased N-acetyl-aspartate/creatine ratios on 1H-magnetic resonance spectroscopy. These findings suggested that the lesions were vasogenic edema associated with inflammation. Unusual brain symptoms associated with such lesions included recurrent limbic encephalitis, parkinsonism, and coma. Conclusion Anti-AQP4 antibody is considered to be associated with the neuroimaging appearances of vasogenic edema.
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Litzenberg D, Bulanov SS, Chvykov V, Brantov A, Bychenkov V, Kalintchenko G, Matsuoka T, Dollar F, Rousseau P, Reed S, Yanovsky V, Krushelnick K, Maksimchuk A. MO-EE-A2-05: Experimental Implementation of the Directed Coulomb Explosion Regime of Laser-Proton Acceleration. Med Phys 2009. [DOI: 10.1118/1.3182257] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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Okuma T, Matsuoka T, Yamamoto A, Hamamoto S, Nakamura K, Inoue Y. Assessment of early treatment response after CT-guided radiofrequency ablation of unresectable lung tumours by diffusion-weighted MRI: a pilot study. Br J Radiol 2009; 82:989-94. [PMID: 19470575 DOI: 10.1259/bjr/13217618] [Citation(s) in RCA: 66] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
The aim of this study was to evaluate prospectively the early treatment response after CT-guided radiofrequency ablation (RFA) of unresectable lung tumours by MRI including diffusion-weighted imaging (DWI). The study protocol was approved by the ethics committee of our hospital and signed consent was obtained from each patient. We studied 17 patients with 20 lung lesions (13 men and 4 women; mean age, 69+/-9.8 years; mean tumour size, 20.8+/-9.0 mm) who underwent RFA using a LeVeen electrode between November 2006 and January 2008. MRI was performed on a 1.5T unit before and 3 days after ablation. We compared changes in the apparent diffusion coefficient (ADC) on DWI and response evaluation based on subsequent follow-up CT. 14 of the 20 treatment sessions showed no local progression on follow-up CT, whereas 6 treatment sessions showed local progression (range, 3-17 months; mean, 6 months). For the no-progression group, the ADC pre- and post-RFA were 1.15+/-0.31 x 10(-3) mm(2) s(-1) and 1.49+/-0.24 x 10(-3) mm(2) s(-1), respectively, while the respective ADC values for those that showed local progression were 1.05+/-0.27 x 10(-3) mm(2) s(-1) and 1.24+/-0.20 x 10(-3) mm(2) s(-1). The ADC of the ablated lesion was significantly higher than before the procedure (p<0.05). There was a significant difference in the ADC post-RFA between no-progression and local progression groups (p<0.05). Our prospective pilot study showed that the ADC without local progression was significantly higher than with local progression after RFA, suggesting that the ADC can predict the response to RFA for lung tumours.
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Matsushita T, Isobe N, Matsuoka T, Shi N, Kawano Y, Wu XM, Yoshiura T, Nakao Y, Ishizu T, Kira JI. Aquaporin-4 autoimmune syndrome and anti-aquaporin-4 antibody-negative opticospinal multiple sclerosis in Japanese. Mult Scler 2009; 15:834-47. [DOI: 10.1177/1352458509104595] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Background Antibodies to aquaporin-4 (AQP4) are found in a fraction of Japanese opticospinal multiple sclerosis (OSMS) patients. However, it remains unknown whether anti-AQP4 antibody-positive and negative OSMS patients possess an identical disease. Objective The objective of the current study was to clarify immunological differences between the two groups of patients. Methods We studied the serum antibody titers against AQP4 in 191 patients with idiopathic central nervous system demyelinating diseases and clarified their relationships with immunological parameters. Results Anti-AQP4 antibody positivity rate was higher in patients with OSMS (21/58, 36.2%), idiopathic recurrent myelitis (4/17, 23.5%), and recurrent optic neuritis (7/26, 26.9%), than in conventional MS (CMS) patients (6/90, 6.7%) and patients with other diseases (0/87). Anti-AQP4 antibody titer was significantly higher in patients with SS-A/B antibodies than in those without them. Anti-AQP4 antibody-negative OSMS patients showed significantly higher CD4+IFN-γ+IL-4−T cell percentages and intracellular IFN-γ/IL-4 ratios than anti-AQP4 antibody-positive patients, anti-AQP4 antibody-negative CMS patients, and healthy controls, and CD4+IFN-γ+IL-4−T cell percentages were negatively correlated with anti-AQP4 antibody titers. Conclusion Anti-AQP4 antibody-positive patients are immunologically distinct from anti-AQP4 antibody-negative OSMS patients owing to a Th2 shift in the former group in comparison to a Th1 shift in the latter.
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Debessai M, Matsuoka T, Hamlin JJ, Schilling JS, Shimizu K. Pressure-induced superconducting state of europium metal at low temperatures. PHYSICAL REVIEW LETTERS 2009; 102:197002. [PMID: 19518988 DOI: 10.1103/physrevlett.102.197002] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/13/2009] [Indexed: 05/27/2023]
Abstract
Divalent Eu (4f;{7}, J=7/2) possesses a strong local magnetic moment which suppresses superconductivity. Under sufficient pressure it is anticipated that Eu will become trivalent (4f;{6}, J=0) and a weak Van Vleck paramagnet, thus opening the door for a possible superconducting state, in analogy with Am metal (5f;{6}, J=0) which superconducts at 0.79 K. We present ac susceptibility and electrical resistivity measurements on Eu metal for temperatures 1.5-297 K to pressures as high as 142 GPa. At approximately 80 GPa Eu becomes superconducting at T_{c} approximately 1.8 K; T_{c} increases linearly with pressure to 2.75 K at 142 GPa. Eu metal thus becomes the 53rd known elemental superconductor in the periodic table.
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Igai H, Takahashi M, Ohata K, Yamashina A, Matsuoka T, Kameyama K, Nakagawa T, Okumura N. Surgical treatment for non-small cell lung cancer in octogenarians - the usefulness of video-assisted thoracic surgery. Interact Cardiovasc Thorac Surg 2009; 9:274-7. [DOI: 10.1510/icvts.2008.199455] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
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71
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Yamaguchi T, Matsuoka T, Koda S. A theoretical study on the frequency-dependent electric conductivity of electrolyte solutions. II. Effect of hydrodynamic interaction. J Chem Phys 2009; 130:094506. [DOI: 10.1063/1.3085717] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
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Hisano T, Ichikawa M, Matsuoka T, Muraoka K, Hamana M. FORMATION OF A NEW TYPE OF 1:2 ADDUCT FROM THE REACTION OF 2,3-LUTIDINE N-OXIDE WITH PHENYL ISOCYANATE. ORG PREP PROCED INT 2009. [DOI: 10.1080/00304948109356152] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Matsuoka T, Arai Y, Yamakado K, Koyama Y, Anai H, Tanigawa N, Kanazawa S, Inoue T, Murayama S. Abstract No. 11: Phase 1/2 Multi-Center Study of Percutaneous Radiofrequency Ablation for Malignant Lung Tumors (JIVROSG 0203). J Vasc Interv Radiol 2009. [DOI: 10.1016/j.jvir.2008.12.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Matsushita T, Matsuoka T, Isobe N, Kawano Y, Minohara M, Shi N, Nishimura Y, Ochi H, Kira J. Association of theHLA-DPB1*0501allele with anti-aquaporin-4 antibody positivity in Japanese patients with idiopathic central nervous system demyelinating disorders. ACTA ACUST UNITED AC 2009; 73:171-6. [DOI: 10.1111/j.1399-0039.2008.01172.x] [Citation(s) in RCA: 100] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Doi H, Matsushita T, Isobe N, Matsuoka T, Minohara M, Ochi H, Kira JI. Hypercomplementemia at relapse in patients with anti-aquaporin-4 antibody. Mult Scler 2009; 15:304-10. [DOI: 10.1177/1352458508099139] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Objective Because Asian patients with opticospinal multiple sclerosis (OSMS) frequently have anti-aquaporin-4 (AQP4) antibody, complement-mediated disruption of astrocyte foot processes is proposed but not yet proven. We aimed to clarify whether complement consumption occurs at relapse in anti-AQP4 antibody-positive patients. Methods We analyzed serum CH50, C3, C4, and C-reactive protein (CRP) levels and their relation to clinical phases in 118 MS patients with or without anti-AQP4 antibody. Serum CH50 levels were higher in 24 patients with anti-AQP4 antibody than in 39 OSMS and 54 conventional form of MS (CMS) patients without anti-AQP4 antibody at relapse ( Pcorr < 0.05) but not in remission. The frequency of hypercomplementemia at relapse was also higher in anti-AQP4 antibody-positive patients than in anti-AQP4 antibody-negative CMS patients (70.4% vs 29.0%, Pcorr < 0.05). C3 and C4 levels did not differ significantly among the three groups at relapse. In patients with anti-AQP4 antibody, the coexistence of hypercomplementemia and high CRP values was more common at relapse than in the remission phase (36.0% vs 10.5%, P < 0.05). In patients with extensive central nervous system lesions, hypercomplementemia was significantly more common in anti-AQP4 antibody-positive patients than anti-AQP4 antibody-negative ones (88.9% vs 16.7%, P < 0.01). We consider that hypercomplementemia in anti-AQP4 antibody-positive patients may reflect a systemic inflammatory reaction at relapse.
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