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Nguyen A, Imamura T, Chung B, Narang N, Holzhauser L, LaBuhn C, Rodgers D, Ota T, Song T, Costanzo M, Kalantari S, Sarswat N, Raikhelkar J, Kim G, Jeevanandam V, Sayer G, Uriel N. Changes in Metabolic Profiles Following Left Ventricular Assist Device Implantation. J Heart Lung Transplant 2018. [DOI: 10.1016/j.healun.2018.01.1234] [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] Open
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Imamura T, Sumitomo N, Muraji S, Mori H, Iwashita N, Komori A, Osada Y, Nakano M, Oyanagi T, Kojima T, Yoshiba S, Kobayashi T. 221Characteristics of pediatric Brugada syndrome. Europace 2018. [DOI: 10.1093/europace/euy015.070] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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53
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Imamura T, Konno S, Murata M, Inoue M, Matsumoto M, Kobayashi M, Kihara H, Sugimoto H, Fujioka T. High serum osmotic pressure on admission suggests hidden malnutrition in patients with neurological disease. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.1714] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Oishi Y, Imamura T, Shimomura T, Suzuki K. Visual texture agnosia in dementia with lewy bodies and Alzheimer’s disease. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.2171] [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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Ohyagi Y, Ohara M, Igase M, Nakamura N, Imamura T, Yanagihara Y, Kira J, Watanabe A, Fujii N. Glucose intolerance associating with cognitive impairment and brain diabetes as a therapeutic target in alzheimer’s disease. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.233] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Nitta D, Kinugawa K, Imamura T, Iino J, Endo M, Amiya E, Hatano M, Kinoshita O, Nawata K, Ono M, Komuro I. Association of the Number of HLA-DR Mismatches With Early Post-transplant Acute Cellular Rejection Among Heart Transplantation Recipients: A Cohort Study in Japanese Population. Transplant Proc 2017; 49:125-129. [PMID: 28104119 DOI: 10.1016/j.transproceed.2016.11.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
BACKGROUND Although many risk factors are reported about graft rejection after heart transplantation (HTx), the effect of HLA mismatch (MM) still remains unknown, especially in the Japanese population. The aim of the present study was to investigate the influence of HLA MM on graft rejection among HTx recipients in Japan. METHODS We retrospectively investigated the association of the number of HLA MM including class I (A, B) and class II (DR) (for each locus MM: 0 to 2, total MM: 0 to 6) and the incidence of moderate to severe acute cellular rejection (ACR) confirmed by endomyocardial biopsy (International Society for Heart and Lung Transplantation grade ≥ 3A/2R) within 1 year after HTx. RESULTS Between 2007 and 2014, we had 49 HTx cases in our institute. After excluding those with insufficient data and positive donor-specific antigen, finally 35 patients were enrolled. Moderate to severe ACR was observed in 16 (45.7%) patients. The number of HLA-DR MM was significantly associated with the development of ACR (ACR+: 1.50 ± 0.63, ACR-: 1.11 ± 0.46, P = .029). From univariate analysis, DR MM = 2 was the only independent risk factor for ACR episodes (P = .017). The frequency of ACR within 1 year was significantly higher in those with DR MM = 2 (DR MM = 0 to 1: 0.3 ± 0.47, DR MM = 2: 1.17 ± 1.34 times, P = .007). CONCLUSIONS The number of HLA-DR MMs was associated with the development and recurrence of ACR episodes among HTx recipients within 1 year after transplantation in Japanese population.
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Juricek C, Imamura T, Costantini H, Kagan V, Song T, Onsager D, Ota T, Adatya S, Kim G, Sarswat N, Sayer G, Jeevanandam V, Uriel N. Predictors of Hemodynamic Stabilization Following Intra-Aortic Balloon Pump Implantation for Cardiogenic Shock. J Heart Lung Transplant 2017. [DOI: 10.1016/j.healun.2017.01.301] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
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Mehta P, Juricek C, Imamura T, Adatya S, Sarswat N, Kim G, Raikhelkar J, Ota T, Jeevanandam V, Sayer G, Uriel N. Increased Post-Operative Mortality in Patients Undergoing Coronary Artery Bypass Grafting During Left Ventricular Assist Device Implantation. J Heart Lung Transplant 2017. [DOI: 10.1016/j.healun.2017.01.960] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
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Kim G, Rodgers D, Imamura T, Nguyen A, Chung B, Sarswat N, Raikhelkar J, Adatya S, Sayer G, Abbo R, Burkhoff D, Uriel N. Noninvasive Assessment of Lung Fluid Percentage in Patients with Left Ventricular Assist Devices. J Heart Lung Transplant 2017. [DOI: 10.1016/j.healun.2017.01.992] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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Nguyen A, Lourenco L, Bassi N, Imamura T, Sarswat N, Raikhelkar J, Adatya S, Kim G, Murks C, Powers J, Riley T, Jeevanandam V, Sayer G, Uriel N. Increased Risk of Rejection and Mortality in Heart Transplant Patients Receiving Granulocyte-Colony Stimulating Factor. J Heart Lung Transplant 2017. [DOI: 10.1016/j.healun.2017.01.1485] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
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Chung B, Knapp M, Rodgers D, Kim G, Adatya S, Sarswat N, Imamura T, Karrar E, Zhou J, Zhang L, Sayer G, Liao J, Uriel N. Longitudinal Rho-Associated Kinase (ROCK) Activity Correlates with Rejection in Heart Transplant Recipients. J Heart Lung Transplant 2017. [DOI: 10.1016/j.healun.2017.01.522] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
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Imamura T, Rodgers D, Adatya S, Sarswat N, Kim G, Raikhelkar J, Ota T, Jeevanandam V, Sayer G, Burkhoff D, Uriel N. The Ramp Fingerprint: LVAD Patients Have Similar Filling Pressures and Speed Change Responses at Repeat Ramp Tests. J Heart Lung Transplant 2017. [DOI: 10.1016/j.healun.2017.01.990] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
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Konno S, Imamura T, Inoue M, Murata M, Sugimoto H, Fujioka T. Severe ileus and urinary retention in a patient with tuberculous meningitis. Clin Case Rep 2017; 5:290-295. [PMID: 28265393 PMCID: PMC5331253 DOI: 10.1002/ccr3.804] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2016] [Revised: 11/01/2016] [Accepted: 11/23/2016] [Indexed: 11/08/2022] Open
Abstract
An acute ileus and/or urinary retention are recognized as emergent complications requiring appropriate depressurizing treatments. Meningitis should be suspected as a cause of these autonomic disturbances.
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Kimura M, Nawata K, Kinoshita O, Yamauchi H, Itoda Y, Imamura T, Hatano M, Kinugawa K, Ono M. Cerebrovascular Accident Rate Is Different Between Centrifugal and Axial-Flow Pumps, but Survival and Driveline Infection Rates Are Similar. Transplant Proc 2017; 49:121-124. [DOI: 10.1016/j.transproceed.2016.10.012] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Sakaguchi K, Hosono M, Imamura T, Takahara N, Hayashi M, Yakushiji Y, Ishii K, Uto T, Murakami T. Estimation of activity of administered 18F-fluorodeoxyglucose by measurement of the dose equivalent rate on the right temporal region of the head. EJNMMI Phys 2016; 3:28. [PMID: 27844449 PMCID: PMC5108740 DOI: 10.1186/s40658-016-0164-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2016] [Accepted: 11/01/2016] [Indexed: 12/02/2022] Open
Abstract
Background Positron emission tomography (PET) with 18F-fluorodeoxyglucose (FDG) is now a routine procedure for the management of cancer patients. Intravenous administration of FDG is sometimes halted due to troubles. In such cases, estimations of the FDG dosage injected prior to halting administration may be helpful. We have established a method of estimating the activity of FDG to patients on the basis of the dose equivalent rate on the surface of the right temporal region of the head. The correlation of actual administered dosage with independent variables, such as the dose equivalent rate on the right temporal region of the head, age, sex, and body weight, was analyzed using multiple regression analysis to obtain linear, quadratic, and cubic regression equations. Results When entering independent variables, the cubic regression equation could be used to estimate an administered dosage with an accuracy of ±10 % for 62 % of all patients and ±20 % for 90 % of all patients. Conclusions We conclude that this method is useful for estimating the administered dosage from the dose equivalent rate on the temporal region of the head.
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Akahane M, Shimizu T, Kira T, Onishi T, Uchihara Y, Imamura T, Tanaka Y. Culturing bone marrow cells with dexamethasone and ascorbic acid improves osteogenic cell sheet structure. Bone Joint Res 2016; 5:569-576. [PMID: 27881440 PMCID: PMC5131089 DOI: 10.1302/2046-3758.511.bjr-2016-0013.r1] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/21/2016] [Accepted: 09/09/2016] [Indexed: 02/06/2023] Open
Abstract
Objectives To assess the structure and extracellular matrix molecule expression of osteogenic cell sheets created via culture in medium with both dexamethasone (Dex) and ascorbic acid phosphate (AscP) compared either Dex or AscP alone. Methods Osteogenic cell sheets were prepared by culturing rat bone marrow stromal cells in a minimal essential medium (MEM), MEM with AscP, MEM with Dex, and MEM with Dex and AscP (Dex/AscP). The cell number and messenger (m)RNA expression were assessed in vitro, and the appearance of the cell sheets was observed after mechanical retrieval using a scraper. β-tricalcium phosphate (β-TCP) was then wrapped with the cell sheets from the four different groups and subcutaneously implanted into rats. Results After mechanical retrieval, the osteogenic cell sheets from the MEM, MEM with AscP, and MEM with Dex groups appeared to be fragmented or incomplete structures. The cell sheets cultured with Dex/AscP remained intact after mechanical retrieval, without any identifiable tears. Culture with Dex/AscP increased the mRNA and protein expression of extracellular matrix proteins and cell number compared with those of the other three groups. More bridging bone formation was observed after transplantation of the β-TCP scaffold wrapped with cell sheets cultured with Dex/AscP, than in the other groups. Conclusions These results suggest that culture with Dex/AscP improves the mechanical integrity of the osteogenic cell sheets, allowing retrieval of the confluent cells in a single cell sheet structure. This method may be beneficial when applied in cases of difficult tissue reconstruction, such as nonunion, bone defects, and osteonecrosis. Cite this article: M. Akahane, T. Shimizu, T. Kira, T. Onishi, Y. Uchihara, T. Imamura, Y. Tanaka. Culturing bone marrow cells with dexamethasone and ascorbic acid improves osteogenic cell sheet structure. Bone Joint Res 2016;5:569–576. DOI: 10.1302/2046-3758.511.BJR-2016-0013.R1.
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Okajima W, Komatsu S, Ichikawa D, Miyamae M, Ohashi T, Imamura T, Kiuchi J, Taniguchi H, Eigo O. Circulating microRNA profiles in plasma: identification of miR-224 as a novel diagnostic biomarker in hepatocellular carcinoma independent of hepatic function. Eur J Cancer 2016. [DOI: 10.1016/s0959-8049(16)61544-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Imamura T, Komatsu S, Ichikawa D, Miyamae M, Morimura R, Ikoma H, Konishi H, Shiozaki A, Taniguchi H, Otsuji E. Plasma microRNA profiles; down-regulation of plasma miR-107 level contributes to poor outcomes in pancreatic cancer. Eur J Cancer 2016. [DOI: 10.1016/s0959-8049(16)61414-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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69
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Ohashi T, Komatsu S, Ichikawa D, Miyamae M, Okajima W, Imamura T, Kiuchi J, Okamoto K, Tsuda H, Otsuji E. Overexpression of PBK/TOPK relates to tumor malignant potential and poor outcome of gastric carcinoma. Eur J Cancer 2016. [DOI: 10.1016/s0959-8049(16)61052-3] [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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Imamura T, Kiyokawa N, Kato M, Imai C, Okamoto Y, Yano M, Ohki K, Yamashita Y, Kodama Y, Saito A, Mori M, Ishimaru S, Deguchi T, Hashii Y, Shimomura Y, Hori T, Kato K, Goto H, Ogawa C, Koh K, Taki T, Manabe A, Sato A, Kikuta A, Adachi S, Horibe K, Ohara A, Watanabe A, Kawano Y, Ishii E, Shimada H. Characterization of pediatric Philadelphia-negative B-cell precursor acute lymphoblastic leukemia with kinase fusions in Japan. Blood Cancer J 2016; 6:e419. [PMID: 27176795 PMCID: PMC4916297 DOI: 10.1038/bcj.2016.28] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2016] [Accepted: 04/06/2016] [Indexed: 12/11/2022] Open
Abstract
Recent studies revealed that a substantial proportion of patients with high-risk B-cell precursor acute lymphoblastic leukemia (BCP-ALL) harbor fusions involving tyrosine kinase and cytokine receptors, such as ABL1, PDGFRB, JAK2 and CRLF2, which are targeted by tyrosine kinase inhibitors (TKIs). In the present study, transcriptome analysis or multiplex reverse transcriptase–PCR analysis of 373 BCP-ALL patients without recurrent genetic abnormalities identified 29 patients with kinase fusions. Clinically, male predominance (male/female: 22/7), older age at onset (mean age at onset: 8.8 years) and a high white blood cell count at diagnosis (mean: 94 200/μl) reflected the predominance of National Cancer Institute high-risk (NCI-HR) patients (NCI-standard risk/HR: 8/21). Genetic analysis identified three patients with ABL1 rearrangements, eight with PDGFRB rearrangements, two with JAK2 rearrangements, three with IgH-EPOR and one with NCOR1-LYN. Of the 14 patients with CRLF2 rearrangements, two harbored IgH-EPOR and PDGFRB rearrangements. IKZF1 deletion was present in 16 of the 22 patients. The 5-year event-free and overall survival rates were 48.6±9.7% and 73.5±8.6%, respectively. The outcome was not satisfactory without sophisticated minimal residual disease-based stratification. Furthermore, the efficacy of TKIs combined with conventional chemotherapy without allogeneic hematopoietic stem cell transplantation in this cohort should be determined.
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Imamura T, Kinugawa K, Nitta D, Hatano M, Komuro I. Long-Term Adaptive Servo-Ventilator Treatment Prevents Cardiac Death and Improves Clinical Outcome in Patients with Advanced Heart Failure. J Heart Lung Transplant 2016. [DOI: 10.1016/j.healun.2016.01.052] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
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Imamura T, Kinugawa K, Nitta D, Hatano M, Itoda Y, Kimura M, Kinoshita O, Yamauchi H, Nawata K, Ono M. Novel Effect of Everolimus in Heart Transplant Recipients - Attenuation of Myocardial Hypertrophy and Improvement of Diastolic Function. J Heart Lung Transplant 2016. [DOI: 10.1016/j.healun.2016.01.802] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
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Ogami K, Saiki K, Okamoto K, Wakebe T, Manabe Y, Imamura T, Tsurumoto T. Marked lateral deviation of the phrenic nerve due to variant origin and course of the thyrocervical trunk: a cadaveric study. Surg Radiol Anat 2015; 38:485-8. [PMID: 26438272 PMCID: PMC4850181 DOI: 10.1007/s00276-015-1557-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2015] [Accepted: 09/14/2015] [Indexed: 12/03/2022]
Abstract
Phrenic nerve impairment can often lead to serious respiratory disorders under various pathological conditions. During routine dissection of an 88-year-old Japanese male cadaver, a victim of heart failure, we recognized an extremely rare variation of the right thyrocervical trunk arising from the subclavian artery laterally to the anterior scalene muscle. In addition to that, the ipsilateral phrenic nerve was drawn and displaced remarkably laterad by this vessel. We examined all of the branches arising from subclavian arteries, phrenic nerves and diaphragm muscles. The embryological background of this arterial variation is considered. The marked displacement with prolonged strain had a potential to cause phrenic nerve impairment with an atrophic change of the diaphragm muscle. Recently many image diagnostic technologies have been developed and are often used. However, it is still possible that rare variations like this case may be overlooked and can only be recognized by intimate regional examination while keeping these rare variations in mind.
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Imamura T, Konno S, Inoue M, Murata M, Nakazora H, Sugimoto H, Fujioka T. Convulsion and cerebellar ataxia associated with maternally inherited diabetes and deafness: a case report. Clin Case Rep 2015; 3:656-9. [PMID: 26273464 PMCID: PMC4527818 DOI: 10.1002/ccr3.309] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2015] [Revised: 04/25/2015] [Accepted: 05/13/2015] [Indexed: 11/12/2022] Open
Abstract
Convulsion in diabetics is often considered as a result from fluctuation of blood glucose level. However, if a diabetic patient also presents abnormal neurological signs, mitochondrial diseases need to be considered in the differential diagnosis.
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Saitoh M, Endo K, Furuya S, Minami M, Fukasawa A, Imamura T, Miyazawa K. STAT3 integrates cooperative Ras and TGF-β signals that induce Snail expression. Oncogene 2015; 35:1049-57. [PMID: 25961936 DOI: 10.1038/onc.2015.161] [Citation(s) in RCA: 73] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2014] [Revised: 03/04/2015] [Accepted: 03/20/2015] [Indexed: 01/05/2023]
Abstract
The epithelial-mesenchymal transition (EMT) is a crucial morphological event that occurs during the progression of epithelial tumors. EMT can be induced by transforming growth factor β (TGF-β) in certain kinds of cancer cells through the induction of Snail, a key regulator of EMT. We have previously found that TGF-β remarkably induces Snail expression in cooperation with Ras signals; however, the underlying mechanism of this synergism has not yet been determined. Here, we demonstrate that signal transducer and activator of transcription 3 (STAT3) acts as a mediator that synergizes TGF-β and Ras signals. The overexpression of STAT3 enhanced Snail induction, whereas siRNA-mediated knockdown of STAT3 inhibited it. The STAT3-YF mutant, which has Tyr 705 substituted with Phe, did not enhance Snail induction. Several STAT3 mutants lacking transcriptional activity also failed to enhance it; however, the putative STAT3-binding elements in the Snail promoter regions were not required for STAT3-mediated Snail induction. Protein inhibitor of activated STAT3 (PIAS3) inhibited the enhanced Snail promoter activity induced by TGF-β and Ras. The interaction between PIAS3 and STAT3 was reduced by TGF-β in cells harboring oncogenic Ras, whereas TGF-β promoted the binding of PIAS3 to Smad3, a crucial mediator of TGF-β signaling. Therefore, these findings suggest that STAT3 enhances Snail induction when it is dissociated from PIAS3 by TGF-β in cooperation with Ras signals.
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