comprehensive study on the mechanisms of liver regeneration toward clinical molecular targeting therapy

肝再生机制综合研究面向临床分子靶向治疗

基本信息

  • 批准号:
    17390357
  • 负责人:
  • 金额:
    $ 10.72万
  • 依托单位:
  • 依托单位国家:
    日本
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
  • 财政年份:
    2005
  • 资助国家:
    日本
  • 起止时间:
    2005 至 2007
  • 项目状态:
    已结题

项目摘要

Liver regeneration is composed of a series of complicated processes. The present study was designed to investigate the roles of Jak/STAT3 and PDK1/akt-associated pathways in liver regeneration following partial hepatectomy (PH) using liver-specific STAT3-knockout (L-S3KO), Pdk1-knockout (L-Pdk1KO) and Pdk1/STAT3 double KO (L-DKO) mice.1) Proliferation of hepatocytes following PH was markedly suppressed in LS3-KO mice with reduced cyclinD1 transcript. However, liver mass recovered sufficiently following PH in LS3-KO mice almost equal to that of control mice. Cell size following hepatectomy was significantly larger in LS3-KO mice than in control mice. Hepatectomy induced immediate but transient phosphorylation of Akt, p70S6K, mTOR and GSK-3b in LS3-KO mice much more than in control mice. Additionally, adenoviral transfection of dominant negative mutant of Akt to control and LS3-KO mice led to insufficient liver regeneration following hepatectomy.2) 70% PH was lethal in L-Pdk1KO mice with … More no liver regeneration. Liver regeneration was severely impaired equally in L-Pdk1KO and L-DKO mice even after non-lethal 30% PH. Measurement of cell size revealed that cell growth following hepatectomy did not occur at all in L-Pdk1KO mice, though post-PH mitotic response occurred to the same degree to the control liver. In L-Pdk1KO mice, post-PH phosphorylation of Akt, mTOR, p70^<56K> and S6 were also reduced.Re-activation of Akt by introducing 'pif-pocket' mutant of PDK1 in L-Pdk1KO mice lead normal liver regeneration and cell growth in the post-PH liver without affecting cell proliferation. Activation of Pl3-K in the liver of L-Pdk1KO mice increased mitotic cells via STAT3 activation, but did not improve impaired liver regeneration in L-Pdk1KO mice at all. Taken together, these facts indicate that Pl3-K and PDK1/Akt contribute to liver regeneration by regulating cell proliferation and size, respectively. PDK1/Akt-mediated responsive cell growth is essential in normal liver regeneration following PH especially when cell proliferation is impaired. Less
肝脏再生由一系列复杂的过程组成。本研究旨在利用肝脏特异性 STAT3 敲除 (L-S3KO)、Pdk1 敲除 (L-Pdk1KO) 和 Pdk1/STAT3 双 KO (L-DKO) 小鼠,研究部分肝切除 (PH) 后 Jak/STAT3 和 PDK1/akt 相关通路在肝再生中的作用。 1) 肝细胞增殖 在具有减少的 cyclinD1 转录物的 LS3-KO 小鼠中,PH 后的 PH 显着受到抑制。然而,LS3-KO 小鼠的 PH 后肝脏质量充分恢复,几乎与对照小鼠相同。 LS3-KO 小鼠肝切除后的细胞大小明显大于对照小鼠。肝切除术在 LS3-KO 小鼠中诱导的 Akt、p70S6K、mTOR 和 GSK-3b 的立即但短暂的磷酸化程度远高于对照小鼠。此外,将 Akt 显性失活突变体腺病毒转染至对照小鼠和 LS3-KO 小鼠,会导致肝切除术后肝再生不足。2) 70% PH 对于无肝再生的 L-Pdk1KO 小鼠来说是致命的。即使在非致死性 30% PH 后,L-Pdk1KO 和 L-DKO 小鼠的肝再生也同样受到严重损害。细胞大小的测量表明,L-Pdk1KO 小鼠中肝切除后根本没有发生细胞生长,尽管 PH 后有丝分裂反应与对照肝脏发生相同程度的反应。在 L-Pdk1KO 小鼠中,Akt、mTOR、p70^<56K> 和 S6 的 PH 后磷酸化也降低。通过在 L-Pdk1KO 小鼠中引入 PDK1 的“pif-pocket”突变体来重新激活 Akt,可导致 PH 后肝脏中正常的肝再生和细胞生长,而不影响细胞增殖。 L-Pdk1KO 小鼠肝脏中 Pl3-K 的激活通过 STAT3 激活增加了有丝分裂细胞,但根本没有改善 L-Pdk1KO 小鼠受损的肝脏再生。综上所述,这些事实表明 Pl3-K 和 PDK1/Akt 分别通过调节细胞增殖和大小来促进肝再生。 PDK1/Akt 介导的反应性细胞生长对于 PH 后正常肝脏再生至关重要,尤其是当细胞增殖受损时。较少的

项目成果

期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
The significant correlation between surgical stress of hepatectomy and changes in the serum levels of HGF, IL-6 and soluble Fas in the patients with viral hepatitis
病毒性肝炎患者肝切除手术应激与血清HGF、IL-6、可溶性Fas水平变化的显着相关性
  • DOI:
  • 发表时间:
    2008
  • 期刊:
  • 影响因子:
    0
  • 作者:
    Naoto Gotohda;Hiromi Iwagaki;Michitaka Ozaki;Taira Kinoshita;Masaru Konishi;Toshio Nakagohri;Shinichiro Takahashi;Shinya Saito;Takahito Yagi;Noriaki Tanaka
  • 通讯作者:
    Noriaki Tanaka
Small liver graft regenerates through immediate increase of HGF and IL-6-possible involvement of sinusoidal shear stress in small liver graft-.
小肝移植物通过 HGF 和 IL-6 的立即增加而再生——可能涉及小肝移植物中的正弦剪切应力——。
  • DOI:
  • 发表时间:
    2008
  • 期刊:
  • 影响因子:
    0
  • 作者:
    Takanori Oyama;Hiroshi Sadamori;Hiroyoshi Matsukawa;Hiroshi Murata;Yuzou Umeda;Yasuhiro Watanabe;Michitaka Ozaki;Hiromi Iwagaki;Noriaki Tanaka;Takahito Yagi.
  • 通讯作者:
    Takahito Yagi.
Impact of Ischemia-Reperfusion and Hepatic Resection on Tumor Progression.
缺血再灌注和肝切除对肿瘤进展的影响。
  • DOI:
  • 发表时间:
    2007
  • 期刊:
  • 影响因子:
    0
  • 作者:
    Hiroki Suemoto;Katsuhiro Nishioka;Misako Sato;Akira Ooshima;Shunji Itoh;Ikuji Hatamura;Michitaka Ozaki;Attila Braun;Erika Gustafsson;Reinhard Fassler;Michitaka Ozaki and Satoru Todo. Surgical Stress and Tumor Behavior
  • 通讯作者:
    Michitaka Ozaki and Satoru Todo. Surgical Stress and Tumor Behavior
肝障害・再生におけるSTAT3の新たな機能とその役割-分子標的治療への応用とその可能性について-
STAT3在肝损伤和再生中的新功能和作用-在分子靶向治疗中的应用及其潜力-
  • DOI:
  • 发表时间:
    2007
  • 期刊:
  • 影响因子:
    0
  • 作者:
    尾崎倫孝;芳賀早苗;藤堂省
  • 通讯作者:
    藤堂省
Transduction of exogenous Stat3 into dispersed islet induces proliferation of rat pancreatic β-cell.
将外源 Stat3 转导至分散的胰岛可诱导大鼠胰腺 β 细胞增殖。
  • DOI:
  • 发表时间:
    2006
  • 期刊:
  • 影响因子:
    0
  • 作者:
    Tsukiyama S;Matsushita M;Kamachi H;Matsumoto S;Morita T;Kobayashi S;Tamura H;Ozaki M;Todo S.
  • 通讯作者:
    Todo S.
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OZAKI Michitaka其他文献

OZAKI Michitaka的其他文献

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{{ truncateString('OZAKI Michitaka', 18)}}的其他基金

Analysis of regulatory mechanism for liver regeneration by various types of cell death(autophagy and apoptosis)
各类细胞死亡(自噬和凋亡)对肝再生的调控机制分析
  • 批准号:
    23659631
  • 财政年份:
    2011
  • 资助金额:
    $ 10.72万
  • 项目类别:
    Grant-in-Aid for Challenging Exploratory Research
Development of comprehensive methods for diagnosis/therapy by optic bio-imaging
光学生物成像诊断/治疗综合方法的开发
  • 批准号:
    20249060
  • 财政年份:
    2008
  • 资助金额:
    $ 10.72万
  • 项目类别:
    Grant-in-Aid for Scientific Research (A)

相似海外基金

Signal transduction pathway for S-allyl-L-cysteine-induced cell proliferation in primary cultures of adult rat hepatocytes.
成年大鼠肝细胞原代培养物中 S-烯丙基-L-半胱氨酸诱导的细胞增殖的信号转导途径。
  • 批准号:
    20K16011
  • 财政年份:
    2020
  • 资助金额:
    $ 10.72万
  • 项目类别:
    Grant-in-Aid for Early-Career Scientists
Regulation of B-cell proliferation and differentiation by reorganization of receptor-signal transduction machinery.
通过受体信号转导机制的重组来调节 B 细胞增殖和分化。
  • 批准号:
    19390141
  • 财政年份:
    2007
  • 资助金额:
    $ 10.72万
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
Insulin and DGF signal transduction in human granulosa cells: Impact on cell proliferation, survival and cell differentiation in folliculogenesis
人颗粒细胞中的胰岛素和 DGF 信号转导:对卵泡发生中细胞增殖、存活和细胞分化的影响
  • 批准号:
    5378769
  • 财政年份:
    2002
  • 资助金额:
    $ 10.72万
  • 项目类别:
    Research Grants
The signal-transduction mechanisms of the cell proliferation and differentiation in the submandibular gland
颌下腺细胞增殖分化的信号转导机制
  • 批准号:
    13670006
  • 财政年份:
    2001
  • 资助金额:
    $ 10.72万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
Molecular mechanisms of signal transduction regulating cell proliferation, cell differentiation and cell cycle
信号转导调控细胞增殖、细胞分化和细胞周期的分子机制
  • 批准号:
    12219208
  • 财政年份:
    2000
  • 资助金额:
    $ 10.72万
  • 项目类别:
    Grant-in-Aid for Scientific Research on Priority Areas
Signal transduction for cell proliferation, apoptosis and differentiation via receptor-type tyrosine kinase and Shc molecule.
通过受体型酪氨酸激酶和Shc分子进行细胞增殖、凋亡和分化的信号转导。
  • 批准号:
    10680662
  • 财政年份:
    1998
  • 资助金额:
    $ 10.72万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
Effects of cell proliferation, protein synthesis and intra-cellular signal transduction
细胞增殖、蛋白质合成和细胞内信号转导的影响
  • 批准号:
    07670768
  • 财政年份:
    1995
  • 资助金额:
    $ 10.72万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
Signal Transduction Systems for Cell Proliferation, Differentiation and Adhesion with Emphasis upon the Role of GTP-binding Proteins
细胞增殖、分化和粘附的信号转导系统,重点关注 GTP 结合蛋白的作用
  • 批准号:
    04404091
  • 财政年份:
    1992
  • 资助金额:
    $ 10.72万
  • 项目类别:
    Grant-in-Aid for General Scientific Research (A)
The study of the intracellular signal transduction pathway for cell proliferation and differentiation - Modulation by gangliosides.
细胞增殖和分化的细胞内信号转导途径的研究——神经节苷脂的调节。
  • 批准号:
    03670415
  • 财政年份:
    1991
  • 资助金额:
    $ 10.72万
  • 项目类别:
    Grant-in-Aid for General Scientific Research (C)
Glioma cell proliferation mechanism regarding the signal transduction system in vivo.
胶质瘤细胞增殖机制与体内信号转导系统有关。
  • 批准号:
    02454337
  • 财政年份:
    1990
  • 资助金额:
    $ 10.72万
  • 项目类别:
    Grant-in-Aid for General Scientific Research (B)
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