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Hidaka Y, Hagio M, Kashiba I, Ando K, Otani Y, Satoh H, Konishi Y, Tsuzuki N, Hokamura J, Kajisa M, Wada M, Kirino Y, Asanuma T. Partial costectomy for tracheal collapse and stenosis associated with perinatal rib fracture in three Japanese Black calves. J Vet Med Sci 2015; 78:451-5. [PMID: 26522686 PMCID: PMC4829516 DOI: 10.1292/jvms.15-0378] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
2.3-month-old (Case 1), one-month-old (Case 2) and 6-month-old (Case 3), Japanese Black
calves presented with mild to severe wheezing. All calves had histories of dystocia at
birth with breech presentation. Physical examination, thoracic radiography, endoscopy or
computed tomography indicated wheezing associated with tracheal collapse and stenosis
caused by perinatal rib fractures. Partial resection of the fractured first and second
ribs was performed on all calves. The respiration in Cases 1 and 2 immediately improved
after the surgery, while Case 3 required two weeks to improve. Cases 1 and 3 grew up
healthy and were sold at auction, but Case 2 had a recurrence of wheezing at three months
post-discharge and showed growth retarding. Partial costectomy may be an effective
solution for control of respiration, however, further cases are required to discuss the
criteria for surgical management and to obtain favorable postoperative prognosis in calves
with tracheal collapse and stenosis caused by perinatal rib fractures.
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Satoh H, Szabo S. A mutein of human basic fibroblast growth factor TGP-580 accelerates colonic ulcer healing by stimulating angiogenesis in the ulcer bed in rats. JOURNAL OF PHYSIOLOGY AND PHARMACOLOGY : AN OFFICIAL JOURNAL OF THE POLISH PHYSIOLOGICAL SOCIETY 2015; 66:719-729. [PMID: 26579578] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Received: 06/30/2015] [Accepted: 09/30/2015] [Indexed: 06/05/2023]
Abstract
Previously, we reported that TGP-580, a mutein of human basic fibroblast growth factor (bFGF), accelerated the healing of gastric and duodenal ulcers in rats. In the present study, we examined the effect of TGP-580 on the healing of colonic ulcers. In male Sprague Dawley rats, ulcers were induced in the colon 6 cm from the anus by enema of 50 μl of 3% N-ethylmaleimide, a sulfhydryl alkylator. The lesions were examined under a dissecting microscope (x10). The concentration of bFGF in the ulcerated colon was measured by enzyme immunoassay, and both the distribution of bFGF and the density of microvessels in the ulcer bed were examined by immunohistochemical staining. The content of bFGF in the ulcerated colon was markedly increased associated with ulcer healing, and ulcer healing was significantly delayed by intravenous administration of a monoclonal antibody for bFGF (MAb 3H3) once daily for 10 days. In the ulcer bed, many cells such as fibroblasts, vascular endothelial cells and macrophages were positively stained with bFGF antiserum. TGP-580, human bFGF or dexamethasone was given intracolonally twice daily for 10 days, starting the day after ulcer induction. TGP-580 (0.2 - 20 μg/ml, 200 μl/rat) dose-dependently accelerated ulcer healing, and its effect was more than 10 times stronger than that of human bFGF. Density (μm/0.01 mm(2)) of microvessels in the ulcer bed was significantly increased by treatment with TGP-580, and there was a good correlation between the density of microvessels and the decrease of ulcerated area (R(2) = 0.633). On the other hand dexamethasone (20 μg/ml) inhibited angiogenesis in the ulcer bed and delayed ulcer healing. These results suggest that angiogenesis in the ulcer bed plays an important role in ulcer healing, and that bFGF mutein TGP-580 accelerated colonic ulcer healing, at least in part, by stimulating angiogenesis, whereas glucocorticoids may delay the healing by inhibiting angiogenesis.
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Takahashi S, Aizawa K, Nakayama K, Satoh H. Water-soluble chlorophyll-binding proteins from Arabidopsis thaliana and Raphanus sativus target the endoplasmic reticulum body. BMC Res Notes 2015; 8:365. [PMID: 26289422 PMCID: PMC4546050 DOI: 10.1186/s13104-015-1333-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2015] [Accepted: 08/12/2015] [Indexed: 11/18/2022] Open
Abstract
Background Non-photosynthetic chlorophyll (Chl) proteins called water-soluble Chl-binding proteins are distributed in Brassicaceae plants. Brassica oleracea WSCP (BoWSCP) and Lepidium virginicum WSCP (LvWSCP) are highly expressed in leaves and stems, while Arabidopsis thaliana WSCP (AtWSCP) and Raphanus sativus WSCP (RshWSCP) are highly transcribed in floral organs. BoWSCP and LvWSCP exist in the endoplasmic reticulum (ER) body. However, the subcellular localization of AtWSCP and RshWSCP is still unclear. To determine the subcellular localization of these WSCPs, we constructed transgenic plants expressing Venus-fused AtWSCP or RshWSCP. Results Open reading frames corresponding to full-length AtWSCP and RshWSCP were cloned and ligated between the cauliflower mosaic virus 35S promoter and Venus, a gene encoding a yellow fluorescent protein. We introduced the constructs into A. thaliana by the floral dip method. We succeeded in constructing a number of transformants expressing Venus-fused chimeric AtWSCP (AtWSCP::Venus) or RshWSCP (RshWSCP::Venus). We detected fluorescence derived from the chimeric proteins using a fluorescence microscope system. In cotyledons, fluorescence derived from AtWSCP::Venus and RshWSCP::Venus was detected in spindle structures. The spindle structures altered their shape to a globular form under blue light excitation. In true leaves, the number of spindle structures was drastically reduced. These observations indicate that the spindle structure was the ER body. Conclusions AtWSCP and RshWSCP have the potential for ER body targeting like BoWSCP and LvWSCP.
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Takahashi S, Seki Y, Uchida A, Nakayama K, Satoh H. Are tyrosine residues involved in the photoconversion of the water-soluble chlorophyll-binding protein of Chenopodium album? PLANT BIOLOGY (STUTTGART, GERMANY) 2015; 17:632-638. [PMID: 25287526 DOI: 10.1111/plb.12274] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2014] [Accepted: 09/29/2014] [Indexed: 06/03/2023]
Abstract
Non-photosynthetic and hydrophilic chlorophyll (Chl) proteins, called water-soluble Chl-binding proteins (WSCPs), are distributed in various species of Chenopodiaceae, Amaranthaceae, Polygonaceae and Brassicaceae. Based on their photoconvertibility, WSCPs are categorised into two classes: Class I (photoconvertible) and Class II (non-photoconvertible). Chenopodium album WSCP (CaWSCP; Class I) is able to convert the chlorin skeleton of Chl a into a bacteriochlorin-like skeleton under light in the presence of molecular oxygen. Potassium iodide (KI) is a strong inhibitor of the photoconversion. Because KI attacks tyrosine residues in proteins, tyrosine residues in CaWSCP are considered to be important amino acid residues for the photoconversion. Recently, we identified the gene encoding CaWSCP and found that the mature region of CaWSCP contained four tyrosine residues: Tyr13, Tyr14, Tyr87 and Tyr134. To gain insight into the effect of the tyrosine residues on the photoconversion, we constructed 15 mutant proteins (Y13A, Y14A, Y87A, Y134A, Y13-14A, Y13-87A, Y13-134A, Y14-87A, Y14-134A, Y87-134A, Y13-14-87A, Y13-14-134A, Y13-87-134A, Y14-87-134A and Y13-14-87-134A) using site-directed mutagenesis. Amazingly, all the mutant proteins retained not only chlorophyll-binding activity, but also photoconvertibility. Furthermore, we found that KI strongly inhibited the photoconversion of Y13-14-87-134A. These findings indicated that the four tyrosine residues are not essential for the photoconversion.
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Kuroda J, Inoue N, Satoh H, Fukuzawa R, Terakawa T, Hasegawa Y. Neonatal necrotizing fasciitis of the scrotum caused by Streptococcus agalactiae. Pediatr Int 2015; 57:e56-8. [PMID: 25712264 DOI: 10.1111/ped.12563] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/17/2014] [Revised: 10/02/2014] [Accepted: 10/16/2014] [Indexed: 11/29/2022]
Abstract
We herein describe the case of a 27-day-old male infant who was brought to the emergency room for intermittent crying, and swelling of the left scrotum. Based on the clinical findings, necrotizing fasciitis was suspected, and surgical intervention was successfully completed within a few hours of admission. Streptococcus agalactiae type Ia was cultured from the drained abscess, and was considered the causative pathogen. To our knowledge, this is the first report of neonatal necrotizing fasciitis caused by S. agalactiae. Prompt diagnosis and immediate surgical debridement are crucial in the initial management of this disease.
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Matsui Z, Asanuma H, Satoh H, Aoki Y, Sakurabayashi K, Mizuno R, Oya M. MP54-04 THE NEW DIAGNOSTIC APPROACH USING URETERAL JET ANGLE MEASUREMENT IN CHILDREN WITH URINARY TRACT INFECTION. J Urol 2015. [DOI: 10.1016/j.juro.2015.02.2027] [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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Takahashi S, Aizawa K, Nakamura S, Nakayama K, Fujisaki S, Watanabe S, Satoh H. Accumulation of alkaline earth metals by the green macroalga Bryopsis maxima. Biometals 2015; 28:391-400. [DOI: 10.1007/s10534-015-9843-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2015] [Accepted: 03/02/2015] [Indexed: 10/23/2022]
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Bednarczyk D, Takahashi S, Satoh H, Noy D. Assembly of water-soluble chlorophyll-binding proteins with native hydrophobic chlorophylls in water-in-oil emulsions. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 2015; 1847:307-313. [DOI: 10.1016/j.bbabio.2014.12.003] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2014] [Revised: 12/02/2014] [Accepted: 12/04/2014] [Indexed: 11/15/2022]
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Kaneko Y, Torisu S, Kitahara G, Hidaka Y, Satoh H, Asanuma T, Mizutani S, Osawa T, Naganobu K. Laparoscopic cryptorchidectomy in standing bulls. J Vet Med Sci 2015; 77:631-5. [PMID: 25715955 PMCID: PMC4478748 DOI: 10.1292/jvms.14-0587] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Laparoscopic cryptorchidectomy without insufflation was applied in 10 standing bulls aged 3 to 15 months. Nine bulls were preoperatively pointed out intra-abdominal testes by computed tomography. Preoperative fasting for a minimum of 24 hr provided laparoscopic visualization of intra-abdominal area from the kidney to the inguinal region. Surgical procedure was interrupted by intra-abdominal fat and testis size. It took 0.6 to 1.5 hr in 4 animals weighing 98 to 139 kg, 0.8 to 2.8 hr in 4 animals weighing 170 to 187 kg, and 3 and 4 hr in 2 animals weighing 244 and 300 kg to complete the cryptorchidectomy. In conclusion, standing gasless laparoscopic cryptorchidectomy seems to be most suitable for bulls weighing from 100 to 180 kg.
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Tamura T, Kurishima K, Watanabe H, Nakazawa K, Ishikawa H, Satoh H, Hizawa N. Stage IV non-small cell lung cancer patients aged 75 years and older. Eur Geriatr Med 2015. [DOI: 10.1016/j.eurger.2014.10.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Sugiyama K, Tsukaguchi M, Sasahara H, Isogai K, Toyama A, Satoh H, Saito K, Nakagawa Y, Takahashi K, Tanaka S, Onda K, Hirano T. Relationship between the Peripheral Lymphocyte Response to Mycophenolic Acid in vitro and the Level of ATP in Peripheral CD4+ Lymphocytes before and after Renal Transplantation. Drug Res (Stuttg) 2014; 65:629-34. [PMID: 25549254 DOI: 10.1055/s-0034-1395686] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
OBJECTIVE The lymphocyte immunosuppressant sensitivity test has been used to predict the pharmacodynamics of immunosuppressive drugs for the purpose of preventing acute rejection and infection after renal transplantation. On the other hand, measuring the ATP levels in peripheral CD4+ lymphocytes is also able to monitor the risks of rejection and infection in transplant recipients. In the present study, we examined the relationship between the mycophenolic acid pharmacodynamics and the ATP levels in peripheral lymphocytes before and after renal transplantation. METHODS We examined both the pharmacological efficacy of mycophenolic acid and the lymphocyte ATP levels before and 2, 4 and 6 weeks after the operation in 20 renal transplant recipients. The drug's pharmacological efficacy was evaluated by the 50% inhibitory concentration of the drug against the in vitro proliferation of peripheral blood lymphocytes activated by T cell mitogen. The ATP levels in peripheral CD4+ lymphocytes were measured by the Immuknow assay kit. The relationships between the mycophenolic acid pharmacodynamics and ATP levels in peripheral lymphocytes were examined in these recipients. RESULTS The immunosuppressive effects of mycophenolic acid against mitogen-activated lymphocyte proliferation were significantly and positively correlated with the lymphocyte ATP levels, but only at 6 weeks after transplantation. The relationship was not significant before or at 2 or 4 weeks after the operation. CONCLUSION Our present data raised the possibility that evaluating the pharmacological efficacy of mycophenolic acid pre-transplantation and monitoring the ATP level 6 weeks after transplantation can predict the risk of rejection and/or infection in renal transplant recipients.
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Miyazaki K, Sato S, Kodama T, Satoh H, Hizawa N. SIADH developed in a lung adenocarcinoma patient treated with afatinib. Eur Geriatr Med 2014. [DOI: 10.1016/j.eurger.2014.09.009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Takahashi S, Uchida A, Nakayama K, Satoh H. Effect of near-infrared irradiation on photoconversion of the water-soluble chlorophyll-binding protein of Chenopodium album. Biosci Biotechnol Biochem 2014; 79:439-42. [PMID: 25402334 DOI: 10.1080/09168451.2014.980221] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
We investigated the effects of near-infrared irradiation on the photoconversion of Chenopodium album water-soluble chlorophyll-binding protein (CaWSCP) in the presence of sodium hydrosulfite and found a further photoconversion from CP742 to CP763, a novel form of CaWSCP. Interestingly, one-third of the absorption peak at 668 nm was recovered in CP763, but re-irradiation under oxidative conditions eliminated the photo convertibility of CaWSCP.
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Takahashi S, Abe E, Nakayama K, Satoh H. Identification of genes encoding photoconvertible (Class I) water-soluble chlorophyll-binding proteins from Chenopodium ficifolium. Biosci Biotechnol Biochem 2014; 79:205-10. [PMID: 25333387 DOI: 10.1080/09168451.2014.972326] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
Photoconvertible water-soluble chlorophyll-binding proteins, called Class I WSCPs, have been detected in Chenopodiaceae, Amaranthaceae and Polygonaceae plant species. To date, Chenopodium album WSCP (CaWSCP) is the only cloned gene encoding a Class I WSCP. In this study, we identified two cDNAs encoding Chenopodium ficifolium Class I WSCPs, CfWSCP1, and CfWSCP2. Sequence analyses revealed that the open reading frames of CfWSCP1 and CfWSCP2 were 585 and 588 bp, respectively. Furthermore, both CfWSCPs contain cystein2 and cystein30, which are essential for the chlorophyll-binding ability of CaWSCP. Recombinant CfWSCP1 and CfWSCP2, expressed in Escherichia coli as hexa-histidine fusion proteins (CfWSCP1-His and CfWSCP2-His), formed inclusion bodies; however, we were able to solubilize these using a buffer containing 8 M urea and then refold them by dialysis. The refolded CfWSCP1-His and CfWSCP2-His could bind chlorophylls and exhibited photoconvertibility, confirming that the cloned CfWSCPs are further examples of Class I WSCPs.
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Tamura T, Miyazaki K, Yoshida C, Kagohashi K, Satoh H. Acute leukemia secondary to lung cancer in an elderly. Eur Geriatr Med 2014. [DOI: 10.1016/j.eurger.2014.06.032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Furukawa S, Fujiwara K, Ohara G, Kagohashi K, Satoh H. Domperidone-induced hyper-prolactinemia in an elderly who received chemotherapy for lung cancer. Eur Geriatr Med 2014. [DOI: 10.1016/j.eurger.2014.06.030] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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67
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Satoh H, Kagohashi K, Ohara G. Bronchial asthma in a very elderly improved by hange-koboku-to. Eur Geriatr Med 2014. [DOI: 10.1016/j.eurger.2014.06.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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68
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Sugita C, Komura Y, Tanaka K, Kometani K, Satoh H, Sugita M. Molecular characterization of three PRORP proteins in the moss Physcomitrella patens: nuclear PRORP protein is not essential for moss viability. PLoS One 2014; 9:e108962. [PMID: 25272157 PMCID: PMC4201334 DOI: 10.1371/journal.pone.0108962] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2014] [Accepted: 09/05/2014] [Indexed: 12/03/2022] Open
Abstract
RNase P is a ubiquitous endonuclease that removes the 5′ leader sequence from pre-tRNAs in all organisms. In Arabidopsis thaliana, RNA-free proteinaceous RNase Ps (PRORPs) seem to be enzyme(s) for pre-tRNA 5′-end processing in organelles and the nucleus and are thought to have replaced the ribonucleoprotein RNase P variant. However, the evolution and function of plant PRORPs are not fully understood. Here, we identified and characterized three PRORP-like proteins, PpPPR_63, 67, and 104, in the basal land plant, the moss Physcomitrella patens. PpPPR_63 localizes to the nucleus, while PpPPR_67 and PpPPR_104 are found in both the mitochondria and chloroplasts. The three proteins displayed pre-tRNA 5′-end processing activity in vitro. Mutants with knockout (KO) of the PpPPR_63 gene displayed growth retardation of protonemal colonies, indicating that, unlike Arabidopsis nuclear RPORPs, the moss nuclear PpPPR_63 is not essential for viability. In the KO mutant, nuclear-encoded tRNAAsp (GUC) levels were slightly decreased, whereas most nuclear-encoded tRNA levels were not altered. This indicated that most of the cytosolic mature tRNAs were produced normally without proteinaceous RNase P-like PpPPR_63. Single PpPPR_67 or 104 gene KO mutants displayed different phenotypes of protonemal growth and chloroplast tRNAArg (ACG) accumulation. However, the levels of all other tRNAs were not altered in the KO mutants. In addition, in vitro RNase P assays showed that PpPPR_67 and PpPPR_104 efficiently cleaved chloroplast pre-tRNAArg (CCG) and pre-tRNAArg (UCU) but they cleaved pre-tRNAArg (ACG) with different efficiency. This suggests that the two proteins have overlapping function but their substrate specificity is not identical.
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Takahashi S, Seki Y, Uchida A, Nakayama K, Satoh H. Cysteine-2 and Cys30 are essential for chlorophyll-binding activity of the water-soluble chlorophyll-binding protein (WSCP) of Chenopodium album. Biosci Biotechnol Biochem 2014; 78:1825-32. [PMID: 25060234 DOI: 10.1080/09168451.2014.940274] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Chenopodium album has a non-photosynthetic chlorophyll protein known as the water-soluble chlorophyll (Chl)-binding protein (WSCP). The C. album WSCP (CaWSCP) is able to photoconvert the chlorin skeleton of Chl a into a bacteriochlorin-like skeleton. Reducing reagents such as β-mercaptoethanol or dithiothreitol inhibit photoconversion, indicating that S-S bridge(s) in CaWSCP are quite important for it. Recently, we found that the mature region of CaWSCP contains five cysteine residues; Cys2, Cys30, Cys48, Cys63, and Cys144. To identify which cysteine residues are involved in the photoconversion, we generated five mutants (C2S, C30S, C48S, C63S, and C144S) by site-directed mutagenesis. Interestingly, C48S, C63S, and C144S mutants showed the same Chl-binding activity and photoconvertibility as those of the recombinant wild-type CaWSCP-His, while the C2S and C30S mutants completely lost Chl-binding activity. Our findings indicated that the S-S bridge between Cys2 and Cys30 in each CaWSCP subunit is essential for Chl-binding activity.
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Takahashi S, Uchida A, Nakayama K, Satoh H. Three-step photoconversion of only three subunits of the water-soluble chlorophyll-binding protein tetramer from Chenopodium album. Protein J 2014; 33:337-43. [PMID: 24824829 DOI: 10.1007/s10930-014-9565-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Water-soluble chlorophyll (Chl)-binding proteins (WSCPs) have been found in various plants. WSCPs are categorized into two classes based on their photoconvertibility: Class I (photoconvertible) and Class II (non-photoconvertible). Based on their absorption peaks, which occur in the red wavelengths, the pre- and post-photoconverted forms of Chenopodium album WSCP (CaWSCP) are called CP668 and CP742, respectively. Although various biochemical and biophysical properties of CaWSCP have already been characterized, questions remain regarding the structural dynamics of the photoconversion from CP668 to CP742, and the relationship between the photoconversion activity and incident light wavelength. To address how the wavelength of incident light affects the photoconversion, we performed time-course analyses of CaWSCP photoconversion by using light-emitting diodes that emit either white light, or at the discrete wavelengths 670, 645, 525, 470, or 430 nm. The most efficient photoconversion was observed under irradiation at 430 nm. Less efficient photoconversion was observed under irradiation with 670, 645, 470, or 525 nm light, in that order. The relationship between photoconversion activity and wavelength corresponded with the absorption peak intensities of Chls in the CaWSCP complex. The observed time dependence of the A(742)/A(668) ratio during photoconversion of the CaWSCP complex indicated that the photoconversion from CP668 to CP742 occurs in a three-step reaction, and that only three subunits in the complex could be photoconverted.
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Takahashi S, Uchida A, Nakayama K, Satoh H. The C-terminal Extension Peptide of Non-photoconvertible Water-Soluble Chlorophyll-Binding Proteins (Class II WSCPs) Affects Their Solubility and Stability: Comparative Analyses of the Biochemical and Chlorophyll-Binding Properties of Recombinant Brassica, Raphanus and Lepidium WSCPs with or Without Their C-terminal Extension Peptides. Protein J 2014; 33:75-84. [DOI: 10.1007/s10930-013-9539-5] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Derabe Maobe H, Onodera M, Takahashi M, Satoh H, Fukazawa T. Control of algal production in a high rate algal pond: investigation through batch and continuous experiments. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2014; 69:2519-2525. [PMID: 24960016 DOI: 10.2166/wst.2014.174] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
For decades, arid and semi-arid regions in Africa have faced issues related to water availability for drinking, irrigation and livestock purposes. To tackle these issues, a laboratory scale greywater treatment system based on high rate algal pond (HRAP) technology was investigated in order to guide the operation of the pilot plant implemented in the 2iE campus in Ouagadougou (Burkina Faso). Because of the high suspended solids concentration generally found in effluents of this system, the aim of this study is to improve the performance of HRAPs in term of algal productivity and removal. To determine the selection mechanism of self-flocculated algae, three sets of sequencing batch reactors (SBRs) and three sets of continuous flow reactors (CFRs) were operated. Despite operation with the same solids retention time and the similarity of the algal growth rate found in these reactors, the algal productivity was higher in the SBRs owing to the short hydraulic retention time of 10 days in these reactors. By using a volume of CFR with twice the volume of our experimental CFRs, the algal concentration can be controlled during operation under similar physical conditions in both reactors.
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Satoh H, Saito Y, Yabu H. Robust platforms for creating organic–inorganic nanocomposite microspheres: decorating polymer microspheres containing mussel-inspired adhesion layers with inorganic nanoparticles. Chem Commun (Camb) 2014; 50:14786-9. [DOI: 10.1039/c4cc05433d] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel method for creating stable polymer microspheres decorated with inorganic nanoparticles using a mussel-inspired adhesive layer is reported.
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Osawa H, Yamamoto H, Miura Y, Sasao W, Ino Y, Satoh H, Satoh K, Sugano K. Blue Laser Imaging Provides Excellent Endoscopic Images of Upper Gastrointestinal Lesions. ACTA ACUST UNITED AC 2014. [DOI: 10.1016/j.vjgien.2014.01.001] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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75
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Takahashi S, Yanai H, Oka-Takayama Y, Zanma-Sohtome A, Fujiyama K, Uchida A, Nakayama K, Satoh H. Molecular cloning, characterization and analysis of the intracellular localization of a water-soluble chlorophyll-binding protein (WSCP) from Virginia pepperweed (Lepidium virginicum), a unique WSCP that preferentially binds chlorophyll b in vitro. PLANTA 2013; 238:1065-1080. [PMID: 23995835 DOI: 10.1007/s00425-013-1952-7] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/13/2013] [Accepted: 08/21/2013] [Indexed: 06/02/2023]
Abstract
Various plants possess non-photosynthetic, hydrophilic chlorophyll (Chl) proteins called water-soluble Chl-binding proteins (WSCPs). WSCPs are categorized into two classes; Class I (photoconvertible type) and Class II (non-photoconvertible type). Among Class II WSCPs, only Lepidium virginicum WSCP (LvWSCP) exhibits a low Chl a/b ratio compared with that found in the leaf. Although the physicochemical properties of LvWSCP have been characterized, its molecular properties have not yet been documented. Here, we report the characteristics of the LvWSCP gene, the biochemical properties of a recombinant LvWSCP, and the intracellular localization of LvWSCP. The cloned LvWSCP gene possesses a 669-bp open reading frame. Matrix-assisted laser desorption ionization time-of-flight mass spectrometry analysis revealed that the precursor of LvWSCP contains both N- and C-terminal extension peptides. RT-PCR analysis revealed that LvWSCP was transcribed in various tissues, with the levels being higher in developing tissues. A recombinant LvWSCP and hexa-histidine fusion protein (LvWSCP-His) could remove Chls from the thylakoid in aqueous solution and showed an absorption spectrum identical to that of native LvWSCP. Although LvWSCP-His could bind both Chl a and Chl b, it bound almost exclusively to Chl b when reconstituted in 40 % methanol. To clarify the intracellular targeting functions of the N- and C-terminal extension peptides, we constructed transgenic Arabidopsis thaliana lines expressing the Venus protein fused with the LvWSCP N- and/or C-terminal peptides, as well as Venus fused at the C-terminus of LvWSCP. The results showed that the N-terminal peptide functioned in ER body targeting, while the C-terminal sequence did not act as a trailer peptide.
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76
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Rathnayake RMLD, Song Y, Tumendelger A, Oshiki M, Ishii S, Satoh H, Toyoda S, Yoshida N, Okabe S. Source identification of nitrous oxide on autotrophic partial nitrification in a granular sludge reactor. WATER RESEARCH 2013; 47:7078-7086. [PMID: 24200002 DOI: 10.1016/j.watres.2013.07.055] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/01/2013] [Revised: 06/19/2013] [Accepted: 07/04/2013] [Indexed: 06/02/2023]
Abstract
Emission of nitrous oxide (N2O) during biological wastewater treatment is of growing concern since N2O is a major stratospheric ozone-depleting substance and an important greenhouse gas. The emission of N2O from a lab-scale granular sequencing batch reactor (SBR) for partial nitrification (PN) treating synthetic wastewater without organic carbon was therefore determined in this study, because PN process is known to produce more N2O than conventional nitrification processes. The average N2O emission rate from the SBR was 0.32 ± 0.17 mg-N L(-1) h(-1), corresponding to the average emission of N2O of 0.8 ± 0.4% of the incoming nitrogen load (1.5 ± 0.8% of the converted NH4(+)). Analysis of dynamic concentration profiles during one cycle of the SBR operation demonstrated that N2O concentration in off-gas was the highest just after starting aeration whereas N2O concentration in effluent was gradually increased in the initial 40 min of the aeration period and was decreased thereafter. Isotopomer analysis was conducted to identify the main N2O production pathway in the reactor during one cycle. The hydroxylamine (NH2OH) oxidation pathway accounted for 65% of the total N2O production in the initial phase during one cycle, whereas contribution of the NO2(-) reduction pathway to N2O production was comparable with that of the NH2OH oxidation pathway in the latter phase. In addition, spatial distributions of bacteria and their activities in single microbial granules taken from the reactor were determined with microsensors and by in situ hybridization. Partial nitrification occurred mainly in the oxic surface layer of the granules and ammonia-oxidizing bacteria were abundant in this layer. N2O production was also found mainly in the oxic surface layer. Based on these results, although N2O was produced mainly via NH2OH oxidation pathway in the autotrophic partial nitrification reactor, N2O production mechanisms were complex and could involve multiple N2O production pathways.
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77
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Miyazaki K, Morimoto Y, Nishiyama N, Satoh H, Tanaka M, Shinomiya N, Ito K. Preconditioning methods influence tumor property in an orthotopic bladder urothelial carcinoma rat model. Mol Clin Oncol 2013; 2:65-70. [PMID: 24649309 DOI: 10.3892/mco.2013.214] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2013] [Accepted: 09/11/2013] [Indexed: 11/06/2022] Open
Abstract
Urothelial carcinoma (UC) is an extremely common type of cancer that occurs in the bladder. It has a particularly high rate of recurrence. Therefore, preclinical studies using animal models are essential to determine effective forms of treatment. In the present study, in order to establish an orthotopic bladder UC animal model with clinical relevance, the effects of preconditioning methods on properties of the developed tumor were evaluated. The bladder cavity was pretreated with phosphate-buffered saline (PBS), acid-base, trypsin (TRY) or poly (L-lysine) (PLL) and then rat UC cells (AY-27) (4×106 cells) were inoculated. The results demonstrated that, two weeks later, the tumorigenic rate (88%) and tumor count (2.3 per rat) were not significantly different among the preconditioning methods, whereas tumor volume and invasion depth into bladder tissue were significantly different. Average tumor volumes were >50 mm3 in the PBS and acid-base-treated groups and <10 mm3 in the TRY- and PLL-treated groups. The percentage of invasive tumors (T2 or more advanced stage) was ∼75% of total tumors in the PBS- and acid-base-treated groups, whereas the percentages were reduced in the TRY- and PLL-treated groups (58 and 32%, respectively). Non-invasive tumors (Ta or T1) accounted for 54% of tumors in the PLL-treated group, which was 2-5-fold higher than the percentages in the remaining groups. Properties of the developed tumor in the rat orthotopic UC model were different depending on preconditioning methods. Therefore, different animal models suitable for a discrete preclinical examination may be established by using the appropriate preconditioning condition.
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Takahashi S, Yoshikawa M, Kamada A, Ohtsuki T, Uchida A, Nakayama K, Satoh H. The photoconvertible water-soluble chlorophyll-binding protein of Chenopodium album is a member of DUF538, a superfamily that distributes in Embryophyta. JOURNAL OF PLANT PHYSIOLOGY 2013; 170:1549-1552. [PMID: 23820553 DOI: 10.1016/j.jplph.2013.06.001] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2013] [Revised: 06/03/2013] [Accepted: 06/03/2013] [Indexed: 06/02/2023]
Abstract
Various plants possess hydrophilic chlorophyll (Chl) proteins known as water-soluble Chl-binding proteins (WSCPs). WSCPs exist in two forms: Class I and Class II, of which Class I alone exhibits unique photoconvertibility. Although numerous genes encoding Class II WSCPs have been identified and the molecular properties of their recombinant proteins have been well characterized, no Class I WSCP gene has been identified to date. In this study, we cloned the cDNA and a gene encoding the Class I WSCP of Chenopodium album (CaWSCP). Sequence analyses revealed that CaWSCP comprises a single exon corresponding to 585bp of an open reading frame encoding 195 amino acid residues. The CaWSCP protein sequence possesses a signature of DUF538, a protein superfamily of unknown function found almost exclusively in Embryophyta. The recombinant CaWSCP was expressed in Escherichia coli as a hexa-histidine fusion protein (CaWSCP-His) that removes Chls from the thylakoid. Under visible light illumination, the reconstituted CaWSCP-His was successfully photoconverted into a different pigment with an absorption spectrum identical to that of native CaWSCP. Interestingly, while CaWSCP-His could bind both Chl a and Chl b, photoconversion occurred only in CaWSCP-His reconstituted with Chl a.
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Kawase K, Yamada M, Satoh H, Satoh A, Tsujihata M. Alice in Wonderland syndrome: A case report. J Neurol Sci 2013. [DOI: 10.1016/j.jns.2013.07.738] [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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80
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Yuasa T, Mutsukura K, Nakao Y, Ichinose K, Tomita I, Satoh H, Satoh A, Seto M, Ochi M, Tsujihata M. The volume DWI method increases/INS; detectability of small ischemic lesions in patients with transient global amnesia. J Neurol Sci 2013. [DOI: 10.1016/j.jns.2013.07.972] [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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81
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Kubota S, Yamada M, Satoh H, Tsujihata M. A pure form of amorphognosia: A case report. J Neurol Sci 2013. [DOI: 10.1016/j.jns.2013.07.741] [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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82
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Murayama I, Miyano A, Sasaki Y, Hirata T, Ichijo T, Satoh H, Sato S, Furuhama K. Technical note: Use of a simplified equation for estimating glomerular filtration rate in beef cattle. J Anim Sci 2013; 91:5240-6. [PMID: 24045472 DOI: 10.2527/jas.2013-6817] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
This study was performed to clarify whether a formula (Holstein equation) based on a single blood sample and the isotonic, nonionic, iodine contrast medium iodixanol in Holstein dairy cows can apply to the estimation of glomerular filtration rate (GFR) for beef cattle. To verify the application of iodixanol in beef cattle, instead of the standard tracer inulin, both agents were coadministered as a bolus intravenous injection to identical animals at doses of 10 mg of I/kg of BW and 30 mg/kg. Blood was collected 30, 60, 90, and 120 min after the injection, and the GFR was determined by the conventional multisample strategies. The GFR values from iodixanol were well consistent with those from inulin, and no effects of BW, age, or parity on GFR estimates were noted. However, the GFR in cattle weighing less than 300 kg, aged<1 yr old, largely fluctuated, presumably due to the rapid ruminal growth and dynamic changes in renal function at young adult ages. Using clinically healthy cattle and those with renal failure, the GFR values estimated from the Holstein equation were in good agreement with those by the multisample method using iodixanol (r=0.89, P=0.01). The results indicate that the simplified Holstein equation using iodixanol can be used for estimating the GFR of beef cattle in the same dose regimen as Holstein dairy cows, and provides a practical and ethical alternative.
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83
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Imai A, Takahashi S, Nakayama K, Satoh H. The promoter of the carotenoid cleavage dioxygenase 4a-5 gene of Chrysanthemum morifolium (CmCCD4a-5) drives petal-specific transcription of a conjugated gene in the developing flower. JOURNAL OF PLANT PHYSIOLOGY 2013; 170:1295-1299. [PMID: 23643306 DOI: 10.1016/j.jplph.2013.04.001] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2013] [Revised: 04/04/2013] [Accepted: 04/04/2013] [Indexed: 06/02/2023]
Abstract
Carotenoids comprise one of the major groups of pigments in flowers. Because carotenoids are physiologically indispensable pigments for all photosynthetic plants, their catabolism must be discretely regulated in photosynthetic organs and non-photosynthetic organs such as petals or fruits. In the chrysanthemum, carotenoid cleavage dioxygenase 4a (CmCCD4a), which is dominantly expressed in petals, cleaves carotenoid, leading to a white flower. CmCCD4a-5 was recently identified as a new member of the CmCCD4a family, but its detailed expression profile in plant tissues has not yet been established. In this study, we sequenced a 1094-bp region upstream of CmCCD4a-5 and assessed its petal-specific promoter activity. To evaluate the activity of this gene, we constructed two types of transgenic Arabidopsis thaliana that possessed, respectively, a fusion gene of a 1090-bp or 505-bp segment of the upstream region plus the β-d-glucuronidase (GUS) gene (1090bUR::GUS and 505bUR::GUS). GUS activity in the 505bUR::GUS strain was observed mainly in the anthers/pollen in flower buds, whereas GUS activity of the 1090bUR::GUS strain was observed in immature petals of the flower buds. Among the cis-acting elements located between positions -505 and -1090, no elements that have previously been reported to enhance the expression in petals or to suppress it in anthers/pollen were detected by PLACE analysis, indicating the existence of unknown cis-element(s). A semiquantitative reverse transcription-polymerase chain reaction analysis revealed that CmCCD4a-5 transcription was prominent in petals but was undetectable in roots, stems and leaves.
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84
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Nonaka D, Katoh H, Kumazawa A, Saotome M, Urushida T, Satoh H, Hayashi H. Non-secretory renin prevents ischemic injury by modulating mitochondrial function in diabetic heart. Eur Heart J 2013. [DOI: 10.1093/eurheartj/eht309.p3281] [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: 11/12/2022] Open
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85
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Sano M, Satoh H, Suwa K, Nobuhara M, Saitoh T, Saotome M, Urushida T, Katoh H, Hayashi H. Cardiac involvement in systemic sclerosis and the value of Late Gadolinium Enhancement (LGE) in Cardiac Magnetic Resonance (CMR). Eur Heart J 2013. [DOI: 10.1093/eurheartj/eht309.p2999] [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: 11/13/2022] Open
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86
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Saitoh T, Suwa K, Takehara Y, Sano M, Nobuhara M, Saotome M, Urushida T, Katoh H, Satoh H, Hayashi H. Analyses of intra-left atrial vortex and flow dynamics from pulmonary veins to left ventricle using phase-resolved three-dimensional cine contrast Magnetic Resonance Imaging (4D-Flow MRI). Eur Heart J 2013. [DOI: 10.1093/eurheartj/eht309.p2938] [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: 11/14/2022] Open
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87
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Suwa K, Satoh H, Sano M, Saotome M, Katoh H, Wakabayashi Y, Tawarahara K, Takase H, Terada H, Hayashi H. Functional, morphologic and electrocardiographic abnormalities in patients with apical hypertrophic cardiomyopathy and apical aneurysm: estimation with cardiac magnetic resonance. Eur Heart J 2013. [DOI: 10.1093/eurheartj/eht309.p2998] [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: 11/13/2022] Open
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88
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Yamauchi H, Satoh H, Yamashita T, Shinshi Y, Kikuchi K, Sasaki S, Matsui Y. Immunoglobulin G4-Related Disease of the Heart Causing Aortic Regurgitation and Heart Block. Ann Thorac Surg 2013; 95:e151-3. [DOI: 10.1016/j.athoracsur.2012.11.057] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/29/2012] [Revised: 11/08/2012] [Accepted: 11/16/2012] [Indexed: 11/27/2022]
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89
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Bandara WMKRTW, Ikeda M, Satoh H, Sasakawa M, Nakahara Y, Takahashi M, Okabe S. Introduction of a degassing membrane technology into anaerobic wastewater treatment. WATER ENVIRONMENT RESEARCH : A RESEARCH PUBLICATION OF THE WATER ENVIRONMENT FEDERATION 2013; 85:387-390. [PMID: 23789567 DOI: 10.2175/106143013x13596524516707] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
The effectiveness of degasification using a degassing membrane to improve chemical oxygen demand (COD) removal efficiency was investigated using a bench-scale upflow anaerobic sludge blanket (UASB) reactor. Vacuum degasification was able to transfer dissolved gas in the bulk liquid of the UASB reactor inside the membrane. Such a process might provide thermodynamically favorable conditions for the degradation of organic compounds. The COD-removal efficiency improved from 83% during normal operation to 90% during the degassing operation.
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90
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Donoso-Bravo A, Bandara WMKRTW, Satoh H, Ruiz-Filippi G. Explicit temperature-based model for anaerobic digestion: application in domestic wastewater treatment in a UASB reactor. BIORESOURCE TECHNOLOGY 2013; 133:437-442. [PMID: 23454390 DOI: 10.1016/j.biortech.2013.01.174] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2012] [Revised: 01/30/2013] [Accepted: 01/31/2013] [Indexed: 06/01/2023]
Abstract
Temperature is an important environmental variable that can strongly affect the performance of anaerobic reactors working at ambient temperatures. This study presents a mechanistic mathematical model which depends in an explicit way on the operating temperature. The cardinal temperature model function is proposed to describe the temperature dependence of the kinetic parameters and the experimental data from an UASB-degasification system was used to calibrate and validate the model. The performance of the model is compared with the classic Arrhenius approach. The results showed that the temperature-based model of the anaerobic digestion is able to reproduce a long-term reactor operation in terms of biogas production and the concentration of organic matter at fluctuating ambient temperature.
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91
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Asanuma H, Satoh H, Matsui Z, Mizuno R, Masuda A, Kono H, Morita S, Kosaka T, Kikuchi E, Nagata H, Miyajima A, Nakagawa K, Oya M. 649 COLOR DOPPLER SONOGRAPHIC EVALUATION OF URETERIC JET ANGLE IN DETECTING HIGH GRADE VESICOURETERAL REFLUX IN INFANTS AND YOUNG CHILDREN. J Urol 2013. [DOI: 10.1016/j.juro.2013.02.202] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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92
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Michigoshi Y, Katayama R, Yamagishi N, Kato M, Saito J, Satoh H, Furuhama K. Estimation of glomerular filtration rate in rabbits by a single-sample method using iodixanol. Lab Anim 2013; 46:341-4. [PMID: 23097569 DOI: 10.1258/la.2012.011065] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
To estimate the glomerular filtration rate (GFR) in conscious rabbits, a single-sample method using the non-ionic contrast medium iodixanol was compared with a three-sample method using the standard agent inulin. Iodixanol and inulin were co-administered intravenously to male New Zealand White rabbits at 60 mg I/kg and 40 mg/kg, respectively, and blood was collected 30, 60, 90 and 120 min later. Serum iodixanol and inulin concentrations were separately determined by high performance liquid chromatography and colorimetry, respectively. Serum urea nitrogen (UN) and creatinine concentrations were also determined. Based on the data from healthy and cisplatin-treated rabbits, the GFR estimated by iodixanol was well consistent with that by inulin. Further, when the GFR decreased to more than 60% of the reference value, serum creatinine concentrations became elevated. However, serum UN concentrations exhibited wide fluctuations, presumably due to a difference in renal handlings. The single-sample method using iodixanol was considered to be an expedient tool in both clinical and research settings, because the stress due to a multi-sample method was reduced.
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93
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Takahashi S, Ono M, Uchida A, Nakayama K, Satoh H. Molecular cloning and functional expression of a water-soluble chlorophyll-binding protein from Japanese wild radish. JOURNAL OF PLANT PHYSIOLOGY 2013; 170:406-412. [PMID: 23266282 DOI: 10.1016/j.jplph.2012.10.007] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/03/2012] [Revised: 10/29/2012] [Accepted: 10/29/2012] [Indexed: 06/01/2023]
Abstract
Hydrophilic chlorophyll (Chl)-binding proteins have been isolated from various Brassicaceae plants and are categorized into Class II water-soluble Chl-binding proteins (WSCPs). Although the molecular properties of class II WSCPs including Brassica-type (e.g., cauliflower WSCP, Brussels sprouts WSCP and BnD22, a drought- and salinity-stress-induced 22 kDa protein of rapeseed), a Lepidium-type, and an Arabidopsis-type WSCPs have been well characterized, those of Raphanus-type WSCPs are poorly understood. To gain insight into the molecular diversity of Class II WSCPs, we cloned a novel cDNA encoding a Raphanus sativus var. raphanistroides (Japanese wild radish called 'Hamadaikon') WSCP (RshWSCP). Sequence analysis revealed that the open reading frame of the RshWSCP gene consisted of 666 bp encoding 222 aa residues, including 23 residues of a deduced signal peptide. Functional recombinant RshWSCP was expressed in Escherichia coli as a hexa-histidine fusion protein (RshWSCP-His). Although the RshWSCP-His was expressed as a soluble protein in E. coli, the apo-protein was highly unstable and tended to aggregate during a series of purification steps. When the soluble fraction of RshWSCP-His-expressing E. coli was mixed immediately with homogenate of spinach leaves containing thylakoid, RshWSCP-His was able to remove Chl molecules from the thylakoid and formed a stable Chl-WSCP complex with high hydrophilicity. UV-visible absorption spectra of the reconstituted RshWSCP-His revealed that RshWSCP-His is one of the Class IIA WSCP with the highest Chl a/b ratio analyzed thus far. A semi-quantitative reverse transcription-polymerase chain reaction analysis revealed that RshWSCP was transcribed in buds and flowers but not in roots, stems and various leaves.
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Shiraishi M, Suzuki K, Abe T, Kikuchi T, Satoh H, Nakaji S, Sugawara K. Diurnal variation in neutrophil function. Environ Health Prev Med 2012; 1:65-70. [PMID: 21432424 DOI: 10.1007/bf02931192] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/1995] [Accepted: 01/16/1996] [Indexed: 11/25/2022] Open
Abstract
Neutrophil functions, including chemotaxis, reactive oxygen species (ROS)-producing capacity of neutrophils, and serum opsonic activity were investigated in 9 young healthy male volunteers. Venous blood of these volunteers was obtained under standardized conditions at 4-h intervals over a 24-h span. Neutrophil chemotaxis was evaluated by a modified Boyden technique, ROS-producing capacity of neutrophils and serum opsonic activity were measured by a simultaneous multiple measurement system based on luminol-dependent chemiluminescence and indicated by peak height and peak time. ROS-producing capacity of neutrophils and serum opsonic activity were activated in the daytime, and decreased from night to morning. There were negative correlations between the peak time of the luminol-dependent chemiluminescent response, neutrophil number (p<0.01) and segmented neutrophil number (p>0.01). On the other hand, no significant correlations were noted between serum opsonic activity and IgG, IgA, IgM, C3 or C4. In contrast, the peaks of neutrophil chemotaxis were at the wake-up time (6:00a.m.) and in the evening (6:00p.m.). This study indicates that diurnal variation of neutrophil function exists.
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95
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Takanashi JI, Hayashi M, Yuasa S, Satoh H, Terada H. Hypoyelination in I-cell disease; MRI, MR spectroscopy and neuropathological correlation. Brain Dev 2012; 34:780-3. [PMID: 22269149 DOI: 10.1016/j.braindev.2011.12.013] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/14/2011] [Revised: 12/15/2011] [Accepted: 12/28/2011] [Indexed: 10/14/2022]
Abstract
MRI of a female patient with genetically diagnosed I-cell disease at 2weeks, 4 and 8months revealed delayed myelination or hypomyelination with decreased choline on MR spectroscopy. Brain autopsy was performed 2h after death at 14-month-old. Immunoreactivities for myelin basic protein and proteolipid proteins, markers for mature myelin sheath, were reduced in the myelinated fibers and oligodendrocytes in the white matter, indicating the hypomyelination in the central nervous system. I-Cell disease should be added to the list of delayed or hypomyelination conditions, and this neuroimaging finding could be a key for differentiating I-cell disease from the clinically similar disorder of Hurler syndrome characterized by perivascular lacunation.
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96
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Satoh H, Takeuchi K. Management of NSAID/aspirin-induced small intestinal damage by GI-sparing NSAIDs, anti-ulcer drugs and food constituents. Curr Med Chem 2012; 19:82-9. [PMID: 22300080 DOI: 10.2174/092986712803413980] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2011] [Revised: 11/03/2011] [Accepted: 11/08/2011] [Indexed: 11/22/2022]
Abstract
Recent advances in endoscopic techniques such as capsule endoscopy have revealed that aspirin and other nonsteroidal antiinflammatory drugs (NSAIDs) often cause mucosal lesions not only in the upper gastrointestinal tract, but also in the small intestine in humans. Gastric and duodenal lesions caused by NSAIDs can be treated with anti-secretory agents such as proton pump inhibitors or histamine H2-receptor antagonists; however, these drugs are ineffective in treating NSAID-induced lesions in the small intestine. Furthermore, there are few effective agents for the treatment of small intestinal lesions. Therefore, identification of effective therapies for the treatment of NSAID/aspirin-induced small intestinal lesions remains an urgent priority. In the present review, we focus on novel pharmacological treatments to prevent or reduce NSAID-induced intestinal lesions, i.e., 1) GI-sparing NSAIDs (NO- or H2S-NSAIDs, NSAIDs mixed with phosphatidylcholine); 2) anti-ulcer drugs such as mucosal protective agents (misoprostol, rebamipide, teprenone, etc.) and anti-secretory agents (lansoprazole, etc.); 3) antibiotics (metronidazole) and probiotics (Lactobacillus sp.); and 4) food constituents (lactoferrin and soluble dietary fibers). We surveyed data from clinical trials evaluating these novel treatments. Also reviewed herein were the pros and cons of the novel protective methods from the standpoint of safety, efficacy, convenience, and cost.
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97
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Satoh M, Kikuya M, Ohkubo T, Mori T, Metoki H, Hara A, Utsugi MT, Hashimoto T, Hirose T, Obara T, Inoue R, Asayama K, Kanno A, Totsune K, Hoshi H, Satoh H, Imai Y. Aldosterone-to-renin ratio as a predictor of stroke under conditions of high sodium intake: the Ohasama study. Am J Hypertens 2012; 25:777-83. [PMID: 22476023 DOI: 10.1038/ajh.2012.33] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
BACKGROUND Aldosterone is thought to have deleterious effects on the cardiovascular system. The aldosterone-to-renin ratio (ARR) is more reproducible than aldosterone levels alone and could be an index for inappropriate aldosterone secretion or activity. We previously reported the apparent relation between ARR and hypertension in subjects with high sodium intake. This prospective study investigated the risk of ARR for a first stroke in a general population stratified by sodium intake. METHODS We obtained plasma renin activity (PRA) and plasma aldosterone concentrations (PAC) for 883 participants aged ≥ 35 years not receiving antihypertensive treatment in the general population of Ohasama (mean age: 59.0 ± 11.3 years; 65.6% women). RESULTS Over a mean of 10.9 follow-up years, 45 strokes occurred. The median PRA, PAC, and ARR were 1.2 ng/ml/h, 6.4 ng/dl, and 5.3 ng/dl per ng/ml/h, respectively. Using Cox regression, we computed hazard ratios adjusted for sex, age, body mass index (BMI), and systolic blood pressure. No association between logARR and stroke was observed in subjects overall. However, in subjects with high sodium intake (≥ median of 4,058 mg/day (salt equivalent, 10.5 g/day)), each 1 s.d. increase in logARR was associated with an increased hazard ratio for stroke (hazard ratio: 1.49, P = 0.04). No significant association was observed in subjects with low sodium intake (P = 0.7). When we repeated all the analyses using logPRA or logPAC, no significant associations were found. CONCLUSION These results suggest that high ARR, that is, relative aldosterone excess, is a predictor for stroke under conditions of high sodium intake.
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Fujita J, Kawaguchi M, Kokubu F, Ohara G, Ota K, Huang SK, Morishima Y, Ishii Y, Satoh H, Sakamoto T, Hizawa N. Interleukin-33 induces interleukin-17F in bronchial epithelial cells. Allergy 2012; 67:744-50. [PMID: 22540331 DOI: 10.1111/j.1398-9995.2012.02825.x] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/07/2012] [Indexed: 10/28/2022]
Abstract
BACKGROUND IL-33 is clearly expressed in the airway of patients with asthma, but its role in asthma has not yet been fully understood. IL-17F is also involved in the pathogenesis of asthma. However, the regulatory mechanisms of IL-17F expression remain to be defined. To further indentify the role of IL-33 in asthma, we investigated the expression of IL-17F by IL-33 in bronchial epithelial cells and its signaling mechanisms. METHODS Bronchial epithelial cells were stimulated with IL-33. The levels of IL-17F expression were analyzed using real-time PCR and ELISA. Next, the involvement of ST2, MAP kinases, and mitogen- and stress-activated protein kinase1 (MSK1) was determined by Western blot analyses. Various kinase inhibitors and anti-ST2 neutralizing Abs were added to the culture to identify the key signaling events leading to the expression of IL-17F, in conjunction with the use of short interfering RNAs (siRNAs) targeting MSK1. RESULTS IL-33 significantly induced IL-17F gene and protein expression. The receptor for IL-33, ST2, was expressed in bronchial epithelial cells. Among MAP kinases, IL-33 phosphorylated ERK1/2, but not p38MAPK and JNK. It was inhibited by the pretreatment of anti-ST2 neutralizing (blocking) Abs. MEK inhibitor significantly blocked IL-17F production. Moreover, IL-33 phosphorylated MSK1, and MEK inhibitor diminished its phosphorylation. Finally, MSK1 inhibitors and transfection of the siRNAs targeting MSK1 significantly blocked the IL-17F expression. CONCLUSIONS IL-33 induces IL-17F via ST2-ERK1/2-MSK1 signaling pathway in bronchial epithelial cells. These data suggest that the IL-33/IL-17F axis is involved in allergic airway inflammation and may be a novel therapeutic target.
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Satoh M, Terata S, Kikuya M, Ohkubo T, Hashimoto T, Hara A, Hirose T, Obara T, Metoki H, Inoue R, Asayama K, Nakayama M, Kanno A, Totsune K, Hoshi H, Satoh H, Sato H, Imai Y, Palmer S, Germaine W, Iff S, Craig J, Mitchell P, Wang JJ, Strippoli G, Palmer S, Craig J, Navaneethan S, Tonelli M, Pellegrini F, Strippoli G, Stracke S, Ernst F, Robinson D, Schwahn C, John U, Felix SB, Volzke H, Mysula I, Gozhenko A, Susla O, Minutolo R, Gabbai FB, Agarwal R, Bellizzi V, Nappi F, Conte G, De Nicola L, Smith E, Tomlinson L, Ford M, Mcmahon L, Rajkumar C, Holt S, Lee S, Kim I, Lee D, Rhee H, Song S, Seong E, Kwak I, Redal-Baigorri B, Rasmusen K, Goya Heaf J, Sombolos K, Tsakiris D, John B, Vlahakos D, Siamopoulos K, Vargiemezis V, Nikolaidis P, Iatrou C, Dafnis E, Argyropoulos C, Xynos K, Ramona H, Jos D, Guido F, Patrick D, Dominique L, Begona MYK, Antoon DS, Marc VS, Hellberg M, Wiberg EM, Hoglund P, Simonsen O, Clyne N, Manfredini F, Manfredini F, Bolignano D, Rastelli S, Barilla A, Bertoli S, Ciurlino D, Messa P, Fabrizi F, Zuccala A, Rapana R, Fatuzzo P, Rapisarda F, Bonanno G, Lombardi L, De Paola L, Cupisti A, Fuiano G, Lucisano G, Tripepi G, Catizone L, Zoccali C, Mallamaci F, Ishigami T, Ishigami T, Yamamoto R, Nagasawa Y, Isaka Y, Konta T, Iseki K, Moriyama T, Yamagata K, Tsuruya K, Yoshida H, Fujimoto S, Asahi K, Watanabe T, Morales E, Gutierrez E, Forteza A, Bellot R, Sanchez V, Sanz MP, Evangelista A, Cortina J, Praga M, Hung CC, Yang ML, Hwang SJ, Chen HC, Saglimbene VM, Palmer S, Craig J, Pellegrini F, Vecchio M, Ruospo M, De Berardis G, Strippoli G, DI Iorio B, Bellasi A, Pota A, Russo L, Russo D, Nakano C, Nakano C, Hamano T, Fujii N, Obi Y, Matsui I, Mikami S, Inoue K, Shimomura A, Rakugi H, Isaka Y, Yen CY, Wang HH, Hung CC, Hwang SJ, Chen HC, Postorino M, Postorino M, Cutrupi S, Pizzini P, Marino C, D'arrigo G, Tripepi G, Zoccali C, Ghasemi H, Afshar R, Afshar R, Shabpirai H, Davati A, Zerafatjou N, Abdi S, Khorsand Askari M, Almeida E, Lavinas C, Teixeira C, Raimundo M, Nogueira C, Ferreira M, Sampaio A, Henriques I, Teixeira C, Gomes Da Costa A, Leal M, Ekart R, Hojs N, Pecovnik Balon B, Bevc S, Dvorsak B, Stropnik Galuf T, Hojs R, Lin WH, Guo CY, Wang WM, Yang DC, Kuo TH, Liu MF, Wang MC, Hara S, Tanaka K, Tsuji H, Ohmoto Y, Amaka K, Ubara Y, Arase K, Yilmaz MI, Solak Y, Saglam M, Yaman H, Unal HU, Gok M, Cetinkaya H, Biyik Z, Gaipov A, Caglar K, Tonbul HZ, Turk S, Wang HH, Yen CY, Hung CC, Hwang SJ, Chen HC, Krivoshiev S, Krivoshiev S, Koteva A, Kraev Z, Mihaylov G, Shikov P, David R, Jeffrey J, Andrew S, Michael R, Charmot D, Fouda R, Abdelhamid Y, Alsayed D, Salah S, Belal D, Salem M, Ahmed H, Vecchio M, Palmer S, Saglimbene VM, Ruospo M, Gargano L, Pellegrini F, Strippoli G, Tisljar M, Horvatic I, Bozic B, Crnjakovic Palmovic J, Bacalja J, Bulimbasic S, Galesic Ljubanovic D, Galesic K, Choi JS, Kim CS, Park JW, Bae EH, MA SK, Kim SW, Choi JS, Kim CS, Park JW, Bae EH, MA SK, Kim SW. Clinical Nephrology - Epidemiology I. Nephrol Dial Transplant 2012. [DOI: 10.1093/ndt/gfs216] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Asanuma H, Mizuno R, Masuda A, Satoh H, Matsui Z, Kono H, Shinoda K, Kikuchi E, Nagata H, Miyajima A, Nakagawa K, Oya M. Long-term outcomes of children with Xp11.2 translocation renal cell carcinoma. J Clin Oncol 2012. [DOI: 10.1200/jco.2012.30.15_suppl.9569] [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
9569 Background: We aimed to assess the clinico-pathological characteristics and the long-term prognosis of Xp11.2 translocation renal cell carcinoma (Xp-RCC) in children. Methods: A total of 52 Japanese children with renal tumors were presented to our institutions. Of these, 5 (10%) had RCC, and all RCCs were Xp11.2 translocation subtype with positive nuclear transcription factor E3 immunostaining. We retrospectively reviewed the pathological and hospital records of these 5 patients. Results: In the 1 boy and 4 girls with an average age of 9 years 7 months at diagnosis, the most common presenting complains were gross hematuria (60%) and palpable abdominal mass (40%). All patients had unilateral disease and there was no special family or medical history in any children. Computerized tomography revealed characteristic calcification within the tumor in 4 of the 5 patients (80%). In the remaining case, the lesion had high density areas with microcalcification, as confirmed by histopathological study. In 3 patients with regional lymph node metastasis, calcification was also observed in the metastatic lesions. Stage of the disease were stage I in 1 patient, II in 1, IV without and with distant metastasis in 2 and 1, respectively. All patients underwent transabdominal nephrectomy with regional lymphadenectomy. One patient with stage I disease had multiple metastases 15 months after surgery and died of disease in spite of interferon and chemotherapy 4 years postoperatively. Three patients received adjuvant interferon therapy and 2 of them are without evidence of recurrence postoperative 19 and 14 years, respectively. One of them had lymph node and lung metastases 12 years postoperatively. The remaining one patient had multiple lymph node, lung, bone, and dura mater metastases at diagnosis. The latter 2 patients have received targeted therapy (sunitinib, temsirolimus) without their progression for 6 and 12 months, respectively. Conclusions: Calcification within the tumor and/or metastatic lesions is characteristic findings suggestive of Xp-RCC in children. Regional lymphadenectomy or targeted therapy may provide some benefit in selected pediatric patients. Long-term follow-up is essential in pediatric patients with RCC.
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