著者

Mika Morikawa Rina Naito Koichi Mita Satoshi Watabe Kazunari Nakaishi Teruki Yoshimura Toshiaki Miura Seiichi Hashida Etsuro Ito

出版者

一般社団法人 日本生物物理学会

雑誌

Biophysics and Physicobiology (ISSN:21894779)

巻号頁・発行日

vol.12, pp.79-86, 2015 (Released:2015-11-12)

参考文献数

38

被引用文献数

1 16

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Adiponectin is a hormone secreted from adipocytes, and it demonstrates antidiabetic, anti-atherosclerotic, anti-obesity and anti-inflammatory effects. However, the patterns of change in urinary adiponectin levels in various diseases remain unknown, because only trace amounts of the hormone are present in urine. In the present study, we applied an ultrasensitive ELISA coupled with thio-NAD cycling to measure urinary adiponectin levels. Spike-and-recovery tests using urine confirmed the reliability of our ultrasensitive ELISA. The limit of detection for adiponectin in urine was 2.3×10–19 moles/assay (1.4 pg/mL). The urinary adiponectin concentration ranged between 0.04 and 5.82 ng/mL in healthy subjects. The pilot study showed that the urinary adiponectin levels, which were corrected by the creatinine concentration, were 0.73±0.50 (ng/mg creatinine, N=6) for healthy subjects, versus 12.02±3.85 (ng/mg creatinine, N=3) for patients with diabetes mellitus (DM). That is, the urinary adiponectin levels were higher (P<0.05) in DM patients than in healthy subjects. Further, these urinary adiponectin levels tended to increase with the progression of DM accompanied with nephropathy. Our method is thus expected to provide a simple, rapid and reasonably priced test for noninvasive monitoring of the progression of DM without the requirement of special tools.

著者

Sumihito Togi Misa Togi Satoshi Nagashima Yuichi Kitai Ryuta Muromoto Jun-ichi Kashiwakura Toshiaki Miura Tadashi Matsuda

出版者

The Pharmaceutical Society of Japan

雑誌

BPB Reports (ISSN:2434432X)

巻号頁・発行日

vol.4, no.2, pp.59-63, 2021 (Released:2021-03-25)

参考文献数

44

被引用文献数

2 4

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The controlled and moderate oxidative stress such as ozone induces both inflammatory and anti-inflammatory response. This balance is important for homeostasis of living organisms. Furthermore, it has been shown that this conflict response is mainly regulated by two transcriptional factors, nuclear transcriptional factor κB (NF-κB) and nuclear factor erythroid 2-related factor 2 (Nrf2). NF-κB is involved in inflammatory responses by regulating expression of cyclooxygenase-2 (COX-2) and various inflammatory cytokines while Nrf2 is involved in anti-inflammatory responses by controlling expression of numerous antioxidant enzymes such as heme oxygenase-1 (HO-1). We here demonstrate the molecular mechanisms of the crosstalk between NF-κB and Nrf2 activation during the moderate oxidative stress induced by ozone. We first confirmed the activation of NF-κB and Nrf2 signaling during the moderate oxidative stress in HeLa cells. Induction of NF-κB-mediated COX-2 mRNA expression was observed at the early phase after stimulation (30-60 min after ozone treatment). However, induction of HO-1 mRNA expression was observed at the late phase of stimulation (6 h after stimulation). To reveal the crosstalk between NF-κB and Nrf2, we tested whether reduction of NF-κB expression affects ozone-induced Nrf2 activation by knocking down of NF-κB in HeLa cells. Importantly, the HO-1 induction by ozone was remarkably decreased by a reduction in NF-κB expression. These results suggest that the moderate oxidative stress by ozone initially induces NF-κB activation, and this NF-κB activation is required for HO-1 induction at the late phase of the moderate stress.

著者

三浦 俊明 Toshiaki Miura

雑誌

人文論究 (ISSN:02866773)

巻号頁・発行日

vol.43, no.3, pp.1-14, 1993-12-20

著者

Eri Yamamoto Jun Kobayashi Keiko Kanamaru Toshiaki Miura Fujio Watanabe Noriyuki Kobayashi Masanobu Hasatani

出版者

公益社団法人 化学工学会

雑誌

JOURNAL OF CHEMICAL ENGINEERING OF JAPAN (ISSN:00219592)

巻号頁・発行日

vol.36, no.3, pp.348-352, 2003 (Released:2003-11-15)

参考文献数

10

被引用文献数

5 6

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A new hydrophilic method for achieving a high-performance adsorbent by impregnating silica into pores of activated carbon has been proposed. In the process, silica-gel was synthesized in the pores of activated carbon after inserting a sodium silicate solution into the pores. Three types of activated carbon were tested to produce hydrophilic activated carbon and to investigate the hydrophilicity by measuring the adsorption isotherms of water vapor and pore structure characteristics. The proposed method worked effectively for adding hydrophilicity to activated carbon, since all of adsorption isotherms of the material treated with this method shifted to a lower region of water vapor pressure than that of the raw material. The shift to a lower relative pressure of adsorption isotherm was maximum when the concentration of sodium silicate solution was 1 mass%.