Naoko Kiuchi

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Interleukin-6 (IL-6) induces either differentiation or growth of a variety of cells. Little is known about the molecular basis of this cellular decision. The family of signal transducer and activator of transcription (Stat) proteins are involved in signaling through a variety of cytokine and growth factor receptors, although their biological roles have not(More)
STAT3 (signal transducer and activator of transcription 3) is a key transcription factor mediating the signals for a variety of cytokines, including interleukin-6 (IL-6). The Stat3 gene itself is activated by IL-6 signals. We show that the region of the signal-transducing subunit, gp130, essential for STAT3 activation, is also required for activation of the(More)
To find out glycoproteins involved in the mating reaction ofChlamydomonas reinhardtii, the effect of tunicamycin (TM), a potent inhibitor of glycosylation of proteins, was studied. TM, when present during gametogenesis, blocked the acquisition of agglutinability ofmt + cells. TM also inhibited the recovery of agglutinability ofmt + gamete after trypsin(More)
We have isolated two kinds of cDNA clones encoding glyoxalase I from a human fibrosarcoma HT-1080 cDNA library. One of them is identical to the glyoxalase I cDNA isolated by us, and the other encodes a protein in which alanine at position 111 of the reported sequence for glyoxalase I is replaced by glutamic acid. When the two cDNAs were co-translated in(More)
Two kinds of high molecular mass cytochrome c3 (Hmc) were isolated from Desulfovibrio vulgaris Miyazaki, one from the membrane (mHmc), the other from the soluble fraction (sHmc). Molecular masses of both Hmcs determined by SDS-PAGE are 65 kDa. Each Hmc molecule is composed of a single polypeptide chain and contains 16 hemes. sHmc and mHmc have identical(More)
A transformation system with efficiencies between 6 and 50 stable transformants per micrograms of DNA was developed for Penicillium urticae J1 (ATCC48163) using hygromycin B-resistant plasmids containing or not containing fragments of the P. urticae genome. The tandem repeated integration and/or random integration of vector DNA were observed. Although P.(More)
Assay of the platelet fibrinogen-binding receptor glycoprotein (GP) IIb/IIIa is widely performed using 125I-labeled fibrinogen (125I-fibrinogen). We successfully devised a receptor binding assay system with high selectivity and sensitivity using a stable chemiluminescent acridinium derivative-I-labeled fibrinogen (acridinium-fibrinogen). Human fibrinogen is(More)
The clinical efficacy of a macrolide antibiotic, midecamycin, was studied in 12 adult cases with Mycoplasma pneumoniae pneumonia. The therapeutic effects were excellent or good in 9 cases and fair in 2 cases. On defervescence and disappearance of shadows on chest X-ray the therapeutic effect was satisfactory, but on disappearance of cough therapeutic effect(More)
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