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Ayano M, Tsukamoto H, Tanaka A, Nakano S, Ueki N, Ueda S, Hisamoto S, Ota SI, Akahoshi M, Arinobu Y, Niiro H, Horiuchi T, Akashi K. AB0201 Cell Surface Expression of DNAM-1 (CD226) on CD8+ T Cells is Increased in Patients with Systemic Sclerosis. Ann Rheum Dis 2014. [DOI: 10.1136/annrheumdis-2014-eular.3217] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Edderkaoui M, Grippo PJ, Ouhaddi Y, Benhaddou H, Xu S, Pinkerton K, Tsukamoto H, Knudsen B, Gukovskaya AS, Pandol S. Mouse models of pancreatic cancer induced by chronic pancreatitis and smoking. J Clin Oncol 2014. [DOI: 10.1200/jco.2014.32.3_suppl.229] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
229 Background: Chronic pancreatitis (CP) and smoking are two major risk factors for pancreatic cancer (PaCa). Here we developed mouse models of PaCa by exposing mice to CP and/or smoking. Methods: Wild type (WT) and Pdx1-Cre;LSL-Kras transgenic mice were subjected to 7-hourly cerulein injections (50µg/kg) twice a week for 3 weeks to induce CP. Another group of mice was exposed to tobacco smoke (80mg/m3) in chambers for 5days/week during 6 weeks. A third group was exposed to both treatments. Mice were then sacrificed and pancreatic tissue analyzed. Pancreatic lesions, proliferation, fibrosis, inflammation, EMT and stem cell markers were analyzed by immunohistochemistry and Western. Results: CP significantly increased the number and stage of pancreatic neoplastic (PanIN) lesions with fibrosis, stellate cell activation and inflammation in transgenic mice. These changes were significantly less in WT mice. EMT markers (decrease in E-Cadherin and increase in vimentin protein levels) were stimulated by CP in both WT and transgenic mice. Similarly, smoking stimulated PanIN lesion formation, fibrosis and inflammation in transgenic mice, but to a lesser extent than CP model. Expression of EMT and stem cell markers was greater in the smoking model compared to CP. Combination of CP and smoking induced greater stimulation of PanIN lesion formation, fibrosis and inflammation compared to either treatment alone in transgenic mice. Conclusions: The results indicate that both CP and tobacco smoke promote PaCa progression in transgenic mice. The combination of CP and smoking has greater effects than either treatment alone. EMT and stem cell markers developed in WT as well as in transgenic mice with smoking suggesting that smoking has effects independent of Kras on cell transformation.
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Paolasso I, Briani C, Tsukamoto H, Coraci D, Erra C, Franco PD, Granata G, Padua L. 150. Proposal for a multicenter protocol on the role of ultrasound in immune-mediated neuropathies. Clin Neurophysiol 2013. [DOI: 10.1016/j.clinph.2013.06.177] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Gagliardo A, Coraci D, Romano M, Marquez EF, Tsukamoto H, de Franco P, Padua L. 149. Clinical, neurophysiological and ultrasound assessment in post-surgical follow up of nerve injuries: A case report. Clin Neurophysiol 2013. [DOI: 10.1016/j.clinph.2013.06.176] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Tsukamoto H, Coraci D, Paolasso I, Granata G, Padua L. 153. Sonographic evaluation of Neuromas in patients with limb amputation. Clin Neurophysiol 2013. [DOI: 10.1016/j.clinph.2013.06.180] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Franco PD, Coraci D, Tsukamoto H, Paolasso I, Granata G, Padua L. 41. Ultrasound diagnosis of Meralgia Paresthetica: Review of literature and presentation of 8 cases. Clin Neurophysiol 2013. [DOI: 10.1016/j.clinph.2013.06.068] [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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Tsukamoto H, Coraci D, Paolasso I, Granata G, Padua L, Sonoo M. Sonographic evaluation of neuromas in patients with limb amputation. J Neurol Sci 2013. [DOI: 10.1016/j.jns.2013.07.2224] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Tsukamoto H, Stickel F, Seitz H, Rao R, Gangwar R, Samak G, Mir H, Chaudhry K, Manda B, Nagy L, Sood A, Nagy L, Chiang D, Roychowdhury S. S13 * MULTIPLE HITS IN THE PATHOGENESIS OF ALCOHOLIC LIVER DISEASE. Alcohol Alcohol 2013. [DOI: 10.1093/alcalc/agt119] [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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Tsukamoto H, Farrens DL. A constitutively activating mutation alters the dynamics and energetics of a key conformational change in a ligand-free G protein-coupled receptor. J Biol Chem 2013; 288:28207-16. [PMID: 23940032 DOI: 10.1074/jbc.m113.472464] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
G protein-coupled receptors (GPCRs) undergo dynamic transitions between active and inactive conformations. Usually, these conversions are triggered when the receptor detects an external signal, but some so-called constitutively activating mutations, or CAMs, induce a GPCR to bind and activate G proteins in the absence of external stimulation, in ways still not fully understood. Here, we investigated how a CAM alters the structure of a GPCR and the dynamics involved as the receptor transitions between different conformations. Our approach used site-directed fluorescence labeling (SDFL) spectroscopy to compare opsin, the ligand-free form of the GPCR rhodopsin, with opsin containing the CAM M257Y, focusing specifically on key movements that occur in the sixth transmembrane helix (TM6) during GPCR activation. The site-directed fluorescence labeling data indicate opsin is constrained to an inactive conformation both in detergent micelles and lipid membranes, but when it contains the M257Y CAM, opsin is more dynamic and can interact with a G protein mimetic. Further study of these receptors using tryptophan-induced quenching (TrIQ) methods indicates that in detergent, the CAM significantly increases the population of receptors in the active state, but not in lipids. Subsequent Arrhenius analysis of the TrIQ data suggests that, both in detergent and lipids, the CAM lowers the energy barrier for TM6 movement, a key transition required for conversion between the inactive and active conformations. Together, these data suggest that the lowered energy barrier is a primary effect of the CAM on the receptor dynamics and energetics.
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Otsuka K, Miwa Y, Umemura M, Tsukamoto H, Tokunaga T, Furuya H, Yanai R, Isojima S, Wakabayashi K, Yajima N, Kasama T. AB0377 Efficacy of tacrolimus combination therapy during the maintenance phase of systemic lupus erythematosus. Ann Rheum Dis 2013. [DOI: 10.1136/annrheumdis-2013-eular.2699] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Tanaka A, Tsukamoto H, Mitoma H, Ueda N, Ayano M, Ohta SI, Inoue Y, Arinobu Y, Niiro H, Horiuchi T, Akashi K. THU0168 Serum progranulin levels are elevated in patients with systemic lupus erythematosus, reflecting disease activity. Ann Rheum Dis 2013. [DOI: 10.1136/annrheumdis-2012-eular.2133] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Kasama T, Umemura M, Isojima S, Tokunaga T, Tsukamoto H, Yanai R, Furuya H, Miwa Y. SAT0141 Correlation of Serum Macrophage Migration Inhibitory Factor Levels With Response to Tocilizumab Therapy in Patients with Rheumatoid Arthritis. Ann Rheum Dis 2013. [DOI: 10.1136/annrheumdis-2013-eular.1867] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Wakabayashi K, Umemura M, Tokunaga T, Tsukamoto H, Isojima S, Furuya H, Yanai R, Otsuka K, Takahashi R, Yajima N, Miwa Y, Kasama T. SAT0145 Plasma Levels of Fibrin/Fibrinogen Degradation Products are a Useful Indicator of Disease Activity and Nephritis Complications in Antineutrophil Cytoplasmic Antibody-Associated Vasculitis. Ann Rheum Dis 2013. [DOI: 10.1136/annrheumdis-2013-eular.1871] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Miwa Y, Isojima S, Umemura M, Tsukamoto H, Tokunaga T, Furuya H, Yanai R, Otsuka K, Takahashi R, Wakabayashi K, Yajima N, Kasama T, Hosaka M. AB0263 Correlation of cx3cl1 levels with adl, hrqol and depression to biologic agent therapy in patients with rheumatoid arthritis. Ann Rheum Dis 2013. [DOI: 10.1136/annrheumdis-2013-eular.2586] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Tanaka A, Tsukamoto H, Ueda N, Ayano M, Ohta SI, Ueki N, Ueda S, Hisamoto S, Oryoji D, Hirosaki Y, Akahoshi M, Arinobu Y, Niiro H, Horiuchi T, Tada Y, Akashi K. THU0063 Serum Progranulin Levels are Elevated in Dermatomyositis Patients with Acute Interstitial Lung Disease, Reflecting Severity and Prognosis. Ann Rheum Dis 2013. [DOI: 10.1136/annrheumdis-2013-eular.591] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Yanai R, Isojima S, Tsukamoto H, Tokunaga T, Umemura M, Furuya H, Otsuka K, Takahashi R, Wakabayashi K, Yajima N, Miwa Y, Kasama T. THU0441 Potential Fatality Predictors Caused by Pneumocystis Pneumonia (PCP) in Rheumatic Disease. Ann Rheum Dis 2013. [DOI: 10.1136/annrheumdis-2013-eular.969] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Miwa Y, Isojima S, Umemura M, Tsukamoto H, Tokunaga T, Furuya H, Yanai R, Otsuka K, Takahashi R, Wakabayashi K, Yajima N, Kasama T, Hosaka M. AB0200 Switching biologic agents in patients with rheumatoid arthritis: an observational study of 159 patients evaluating efficacy, adl, qol, and depression. Ann Rheum Dis 2013. [DOI: 10.1136/annrheumdis-2013-eular.2523] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Tsukamoto H, Horiuchi T, Miyamoto T, Niiro H, Arinobu Y, Akahoshi M, Ayano M, Tanaka A, Ueda N, Akashi K. FRI0406 Seven-year follow-up of autologous hematopoietic stem cell transplantation for severe systemic sclerosis. Ann Rheum Dis 2013. [DOI: 10.1136/annrheumdis-2013-eular.1533] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Ueda N, Tsukamoto H, Mitoma H, Ayano M, Tanaka A, Ohta SI, Inoue Y, Arinobu Y, Niiro H, Akashi K, Horiuchi T. AB0482 The cytotoxic effects of certolizumab pegol and golimumab mediated by transmembrane tumor necrosis factor α. Ann Rheum Dis 2013. [DOI: 10.1136/annrheumdis-2012-eular.482] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Tsukamoto H, Horiuchi T, Miyamoto T, Niiro H, Arinobu Y, Inoue Y, Ayano M, Tanaka A, Ueda N, Harada M, Akashi K. THU0238 Long-term follow-up of autologous hematopoietic stem cell transplantation for severe systemic sclerosis. Ann Rheum Dis 2013. [DOI: 10.1136/annrheumdis-2012-eular.2203] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Huang B, Takahashi K, Sakata-Goto T, Kiso H, Togo Y, Saito K, Tsukamoto H, Sugai M, Akira S, Shimizu A, Bessho K. Phenotypes of CCAAT/enhancer-binding protein beta deficiency: hyperdontia and elongated coronoid process. Oral Dis 2012; 19:144-50. [PMID: 22849712 DOI: 10.1111/j.1601-0825.2012.01963.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
OBJECTIVES This investigation aimed to conduct a case-control study of mandibular morphology and dental anomalies to propose a relationship between mandibular/dental phenotypes and deficiency of CCAAT/enhancer-binding protein beta (CEBPB). MATERIALS AND METHODS Skulls of CEBPB(-/-), CEBPB(+/-) and CEBPB(+/+) mice were inspected with micro-computed tomography. Mandibular morphology was assessed with a method of Euclidean distance matrix analysis. RESULTS Elongation of the coronoid process was identified in CEBPB(+/-) (P ≤ 0.046) and CEBPB(-/-) 12-month-olds (P ≤ 0.028) but not in 14-day-olds (P ≥ 0.217) and 0-day-olds (P ≥ 0.189) of either genotype. Formation of supernumerary teeth in CEBPB(-/-) adult mice was demonstrated (χ(2) = 6.00, df = 1, P = 0.014). CONCLUSIONS CEBPB deficiency was related to elongation of the coronoid process and formation of supernumerary teeth. The mandibular and dental phenotypes of CEBPB deficiency were unseen by the 14th day after birth. Future investigations into the influence of CEBPB on mandibular and dental development are needed.
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Sakai K, Imamoto Y, Su CY, Tsukamoto H, Yamashita T, Terakita A, Yau KW, Shichida Y. Photochemical nature of parietopsin. Biochemistry 2012; 51:1933-41. [PMID: 22303823 DOI: 10.1021/bi2018283] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Parietopsin is a nonvisual green light-sensitive opsin closely related to vertebrate visual opsins and was originally identified in lizard parietal eye photoreceptor cells. To obtain insight into the functional diversity of opsins, we investigated by UV-visible absorption spectroscopy the molecular properties of parietopsin and its mutants exogenously expressed in cultured cells and compared the properties to those of vertebrate and invertebrate visual opsins. Our mutational analysis revealed that the counterion in parietopsin is the glutamic acid (Glu) in the second extracellular loop, corresponding to Glu181 in bovine rhodopsin. This arrangement is characteristic of invertebrate rather than vertebrate visual opsins. The photosensitivity and the molar extinction coefficient of parietopsin were also lower than those of vertebrate visual opsins, features likewise characteristic of invertebrate visual opsins. On the other hand, irradiation of parietopsin yielded meta-I, meta-II, and meta-III intermediates after batho and lumi intermediates, similar to vertebrate visual opsins. The pH-dependent equilibrium profile between meta-I and meta-II intermediates was, however, similar to that between acid and alkaline metarhodopsins in invertebrate visual opsins. Thus, parietopsin behaves as an "evolutionary intermediate" between invertebrate and vertebrate visual opsins.
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Nagata T, Koyanagi M, Tsukamoto H, Saeki S, Isono K, Shichida Y, Tokunaga F, Kinoshita M, Arikawa K, Terakita A. Depth Perception from Image Defocus in a Jumping Spider. Science 2012; 335:469-71. [DOI: 10.1126/science.1211667] [Citation(s) in RCA: 96] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
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Nakatsuka A, Tsukamoto H, Shimokawa M, Nakayama N, Yoshiasa A. Static disorder of vanadium ion in NaSr 2Mg 2V 3O 12garnet. Acta Crystallogr A 2011. [DOI: 10.1107/s0108767311085461] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
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Tsukamoto H, Hatanaka Y, Hokkoku K, Chiba T, Ito E, Sonoo M, Shimizu T. P5.7 Activity dependent conduction block and distal conduction disturbance after exercise in anti-MAG neuropathy. Clin Neurophysiol 2011. [DOI: 10.1016/s1388-2457(11)60271-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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