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排序方式: 共有209条查询结果,搜索用时 171 毫秒
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K Yoshida T Sakurada H Kitaoka H Fukazawa N Kaise K Kaise M Yamamoto S Saito K Yoshinaga 《Endocrinologia japonica》1983,30(2):211-217
Monodeiodination of T4 to T3 and rT3 in the intact cells of dog renal tubuli and glomeruli was investigated. The tubuli and glomeruli were obtained by a sieve method. T4 (2 micrograms/ml) was incubated in Tris-HCl buffer, pH 7.5, with renal cells (180 micrograms protein/ml) and 5 mM DTT for 1 h at 37 degrees C and the T3 and rT3 generated during incubation were measured by specific radioimmunoassays. In order of decreasing activity, dog renal cortical tubuli, cortical homogenate, glomeruli and medullary tubuli were capable of converting T4 to T3. Net rT3 production from T4 in cortical tubuli was also greater than that in cortical homogenate. The conversion of T4 to T3 and also to rT3 in cortical tubuli was enzymatic in nature, since the reactions showed dependence on time and protein concentration; instability to heating; temperature and pH optimum. The production of T3 and rT3 from T4 was maximum at pH 6.5 and at pH 9.5, respectively, indicating that two different enzymic systems, a 5- and a 5'-monodeiodinase, might be involved in the deiodination of the tyrosyl and the phenolic ring of T4 in dog kidney. 相似文献
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Tutomu Yasui W. B. Esselen Toshiyuki Fukazawa Yoshio Hashimoto 《Bioscience, biotechnology, and biochemistry》2013,77(8):632-636
Heat penetration data on canned corned beef and luncheon meat are presented. The effects of can size, retort temperature and composition on process requirements and quality are demonstrated and discussed. 相似文献
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Yuka Kobayashi Norikazu Kiguchi Yohji Fukazawa Fumihiro Saika Takehiko Maeda Shiroh Kishioka 《The Journal of biological chemistry》2015,290(20):12603-12613
Peripheral neuroinflammation caused by activated immune cells can provoke neuropathic pain. Herein, we investigate the actions of macrophages and T cells through glucocorticoid-induced tumor neurosis factor receptor ligand (GITRL) and its receptor (GITR) in neuropathic pain. After partial sciatic nerve ligation (PSL) in enhanced green fluorescent protein (eGFP) chimeric mice generated by the transplantation of eGFP+ bone marrow cells, eGFP+ macrophages, and T cells markedly migrated to the injured site after PSL. Administration of agents to deplete macrophages (liposome-clodronate and Clophosome-ATM) or T cells (anti-CD4 antibody and FTY720) could suppress PSL-induced thermal hyperalgesia and tactile allodynia. The expression levels of co-stimulatory molecules GITRL and GITR were increased on infiltrating macrophages and T cells, respectively. The perineural injection of a GITRL neutralizing antibody that could inhibit the function of the GITRL-GITR pathway attenuated PSL-induced neuropathic pain. Additionally, the induction of inflammatory cytokines and the accumulation of GITR+ T cells in the injured SCN were abrogated after macrophage depletion by Clophosome-ATM. In conclusion, GITRL expressed on macrophages drives cytokine release and T cell activation, resulting in neuropathic pain via GITR-dependent actions. The GITRL-GITR pathway might represent a novel target for the treatment of neuropathic pain. 相似文献
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Yoshiyuki Fukuda Yugo Fukazawa Radostin Danev Ryuichi Shigemoto Kuniaki Nagayama 《Journal of structural biology》2009,168(3):476-484
In order to acquire phase-contrast images with adequate contrast, conventional TEM requires large amount of defocus. Increasing the defocus improves the low-frequency components but attenuates the high-frequency ones. On the other hand, Zernike phase-contrast TEM (ZPC-TEM) can recover low-frequency components without losing the high-frequency ones under in-focus conditions. ZPC-TEM however, has another problem, especially in imaging of complex biological specimens such as cells and tissues; strong halos appear around specimen structures, and these halos hinder the interpretation of images. Due to this problem, the application of ZPC-TEM has been restricted to imaging of smaller particles. In order to improve the halo appearance, we fabricated a new quarter-wave thin film phase-plate with a smaller central hole and tested it on vitreous biological specimens. ZPC-TEM with the new plate could successfully visualize, in in-focus images, the intracellular fine features of cultured cells and brain tissues. This result indicates that reduction of the central hole diameter makes ZPC-TEM applicable on size scales ranging from protein particles to tissue sections. The application of ZPC-TEM to vitreous biological specimens will be a powerful method to advance the new field of imaging science for ultrastructures in close-to-physiological state. 相似文献
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Huifang Hao Yutaka Maeda Takuya Fukazawa Tomoki Yamatsuji Munenori Takaoka Xiao-Hong Bao Junji Matsuoka Tatsuo Okui Tsuyoshi Shimo Nagio Takigawa Yasuko Tomono Motowo Nakajima Iris M. Fink-Baldauf Sandra Nelson William Seibel Ruben Papoian Jeffrey A. Whitsett Yoshio Naomoto 《PloS one》2013,8(8)
Midkine (MDK) is a heparin-binding growth factor that is highly expressed in many malignant tumors, including lung cancers. MDK activates the PI3K pathway and induces anti-apoptotic activity, in turn enhancing the survival of tumors. Therefore, the inhibition of MDK is considered a potential strategy for cancer therapy. In the present study, we demonstrate a novel small molecule compound (iMDK) that targets MDK. iMDK inhibited the cell growth of MDK-positive H441 lung adenocarcinoma cells that harbor an oncogenic KRAS mutation and H520 squamous cell lung cancer cells, both of which are types of untreatable lung cancer. However, iMDK did not reduce the cell viability of MDK-negative A549 lung adenocarcinoma cells or normal human lung fibroblast (NHLF) cells indicating its specificity. iMDK suppressed the endogenous expression of MDK but not that of other growth factors such as PTN or VEGF. iMDK suppressed the growth of H441 cells by inhibiting the PI3K pathway and inducing apoptosis. Systemic administration of iMDK significantly inhibited tumor growth in a xenograft mouse model in vivo. Inhibition of MDK with iMDK provides a potential therapeutic approach for the treatment of lung cancers that are driven by MDK. 相似文献