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細(xì)胞信號轉(zhuǎn)導(dǎo)與腫瘤-在線瀏覽

2025-03-10 13:57本頁面
  

【正文】 ntially expressed and activated in different cell types? ? Preexisting coactivators of target proteins? ? Subcellular localization of transducers? ? Optimal level (or a threshold) of phosphorylation/dephosphorylation? 替代通路 ( Alternative Pathways) 信號轉(zhuǎn)導(dǎo)的研究方法與工具 一、蛋白質(zhì)磷酸化狀態(tài)的檢測 免疫印跡 (phosphoprotein specific antibodies) 免疫沉淀 (proteinspecific antibody + phosphoAA antibody 流式細(xì)胞儀分析 Luminex分析 二、信號轉(zhuǎn)導(dǎo)分子過度表達或過度激活 Overexpression by gene transduction Constitutively activated mutants 三、基因轉(zhuǎn)錄活性測定 Electrophoretic mobility shift analysis (EMSA) 2、 Reporter gene expression detection 四、信號轉(zhuǎn)導(dǎo)分子的表達或活性抑制 Antisense RNAi Gene knockout Dominant negative mutants (1) Ligandbinding site (2) Phosphorylation site (3) Docking site (4) Proteinprotein binding site (5) DNA binding site Smallmolecule inhibitors: ., tyrosine kinase inhibitor (TKi) Inhibitory oligopeptides 信號轉(zhuǎn)導(dǎo)在腫瘤發(fā)生發(fā)展中的意義 Signaling molecules involved in cancer development/progression ? Receptors 1) Growth factor receptors: EGFR 2) Hormone receptor: ER, AR 3) Angiogenic receptros: VEGF, PDGF, IGF 4) Death receptors 5) The Integrin system ? Transducers 1) Ras 2) Raf 3) Rho family 4) PI3K/Akt 5) Death transducers 6) STAT3 7) …… ? Transcription factors 1) cMyc 2) cJun and cfos 3) STAT3 4) …… Biological Effects of Signaling Related to Cancer Development/Progression ? Cell immobilization ? Abrogation of apoptosis ? Activation of cell cycle and removal of cell cycle checkpoints ? Angiogenesis ? Cell invasion ? Metastasis ? Drug resistance Phosphorylation targets of PI3K ? Akt ? Forkheadrelated transcription factor 1 (FKHRL1) ? 1433 binding ? FKHRL1 retaining in cytosol ? abrogation of gene activation by FKHRL1 ? Akt ? Bad ? 1433 binding ? Release of Bcl2 and BclX ? Cell survival ? Akt ?GSK3 ?GSK3 catalytic activity turned off ? Permitting activation of cMyc and cyclin D ? PDK1 ? phosphorylation of other kinases (p70 S6kinasse, CISK, PKC) ? Cell growth and survival 信號轉(zhuǎn)導(dǎo)與腫瘤臨床 —— 診斷、預(yù)防與治療 ? Expression level, mutations and antibodies of signaling molecules in cancer diagnosis 1) EGFR: lung, Hamp。 contain the kinase insert IV FGF receptors contain 3 immunoglobulinlike domains as well as the kinase insert。細(xì)胞信號轉(zhuǎn)導(dǎo)與腫瘤 ? 引言:細(xì)胞信號轉(zhuǎn)導(dǎo)與生命過程 —— 問題的提出和理論的產(chǎn)生 ? 細(xì)胞信號轉(zhuǎn)導(dǎo)理論概述 ? 信號轉(zhuǎn)導(dǎo)研究中的重大理論問題及熱點領(lǐng)域 ? 信號轉(zhuǎn)導(dǎo)的研究方法與工具 ? 信號轉(zhuǎn)導(dǎo)理論研究及應(yīng)用舉例:在腫瘤發(fā)生發(fā)展中的信號轉(zhuǎn)導(dǎo)的意義 ? 信號轉(zhuǎn)導(dǎo)與腫瘤臨床:診斷和治療 ? 細(xì)胞信號轉(zhuǎn)導(dǎo)經(jīng)典文獻舉例 引言 信號轉(zhuǎn)導(dǎo)與生命過程 —— 問題的提出和理論的產(chǎn)生 細(xì)胞信號轉(zhuǎn)導(dǎo)理論建立以前的細(xì)胞生物學(xué) ? 細(xì)胞的顯微結(jié)構(gòu)(胞膜、胞漿、胞核) ? 細(xì)胞的生理功能(生存、“活性”、分裂增殖、胞間連接、吞飲、分泌、遷移、死亡 ……) ? 細(xì)胞組分的生物化學(xué)(脂、糖、核酸、蛋白) ? 細(xì)胞的超微結(jié)構(gòu)和亞細(xì)胞結(jié)構(gòu)(脂質(zhì)雙層膜結(jié)構(gòu)、細(xì)胞器 ……) 組織生長需要 細(xì)胞分裂增殖 細(xì)胞 生長因子 病原體侵入 抗感染狀態(tài) 細(xì)胞 抗原 細(xì)胞過度生長 細(xì)胞死亡 細(xì)胞 死亡因子 細(xì)胞骨架蛋 白表達、激活 牽動細(xì)胞移動 (Cell movement) 趨化因子 細(xì)胞粘附 細(xì)胞存活 (Survival) 抗凋亡因子 表達、激活 胞外信號 信號作用 于細(xì)胞 基因表 達改變 細(xì)胞表 型改變 細(xì)胞信號轉(zhuǎn)導(dǎo)理論概述 胞外信號分子 (可溶性分子、細(xì)胞表面分子、組織基質(zhì)分子 ) 靶細(xì)胞跨膜分子 (狹義受體如 EGFR或廣義受體如 Integrin) 靶細(xì)胞受體(胞內(nèi)段)化學(xué)變化(如磷酸化、二聚體形成) 靶細(xì)胞內(nèi)信號轉(zhuǎn)導(dǎo)分子化學(xué)變化與激活 (如磷酸化、去磷酸化、聚體形成) 激活的信號轉(zhuǎn)導(dǎo)分子進入胞核 進入胞核的轉(zhuǎn)導(dǎo)分子作用于基因轉(zhuǎn)錄調(diào)控區(qū) ?基因表達改變 Extracellular Signal Molecules 1. Growth Factors PDGF (PlateletDerived Growth Factor), EGF (Epidermal Growth Factor),
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