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Articles by T. Inoue
Total Records ( 3 ) for T. Inoue
  Y Yamauchi , K Nagatoya , A Okuno , N Fujii and T. Inoue

Thrombotic thrombocytopenic purpura (TTP) complicated with myeloperoxidase anti-neutrophil cytoplasmic autoantibody (MPO-ANCA)-associated vasculitis is rare and generally has a serious prognosis. We report a case wherein TTP was successfully treated with repeated plasma exchange (PE) and MPO-ANCA-associated vasculitis with corticosteroids. The renal function consequently improved such that haemodialysis could be discontinued and the patient was discharged without any significant complications.

  T Kakita , K Nagatoya , T Mori , M Kobayashi and T. Inoue

We present the case of a woman with IgA nephropathy and concomitant Fabry’s disease. She was referred to our hospital with proteinuria and haematuria. A renal biopsy showed findings indicating IgA nephropathy under light and immunofluorescence microscopy. Electron microscopy, however, showed laminated inclusion bodies characteristic of Fabry’s disease. The -galactosidase activity in her serum was low, and the diagnosis of Fabry’s disease was confirmed by genetic analysis. Fabry’s disease in a patient with IgA nephropathy is a very rare occurrence, and Fabry’s disease diagnosed only by electron microscopy has not been previously reported.

  T Nakamura , Y Kado , T Yamaguchi , H Matsumura , K Ishikawa and T. Inoue

Peroxiredoxin (Prx) reduces hydrogen peroxide and alkyl peroxides to water and corresponding alcohols, respectively. The reaction is dependent on a peroxidatic cysteine, whose sulphur atom nucleophilically attacks one of the oxygen atoms of the peroxide substrate. In spite of the many structural studies that have been carried out on this reaction, the tertiary structure of the hydrogen peroxide-bound form of Prx has not been elucidated. In this paper, we report the crystal structure of Prx from Aeropyrum pernix K1 in the peroxide-bound form. The conformation of the polypeptide chain is the same as that in the reduced apo-form. The hydrogen peroxide molecule is in close contact with the peroxidatic Cys50 and the neighbouring Thr47 and Arg126 side chain atoms, as well as with the main chain nitrogen atoms of Val49 and Cys50. Bound peroxide was also observed in the mutant C50S, in which the peroxidatic cysteine was replaced by serine. Therefore, the sulphur atom of the peroxidatic cysteine is not essential for peroxide binding, although it enhances the binding affinity. Hydrogen peroxide binds to the protein so that it fills the active site pocket. This study provides insight into the early stage of the Prx reaction.

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