北京大学:《分子细胞生物学》课程教学资源(PPT课件讲稿,英文版)Chapter 13 Cell apoptosis

Chapter 13 Cell apoptosis 1. Extracellular cotrol of cell division cell growth, and apoptosis I Mitogens stimulate G1-Cdk and g1/s-Cdk activities
Chapter 13 Cell apoptosis 1. Extracellular cotrol of cell division, cell growth, and apoptosis Mitogens stimulate G1-Cdk and G1/S-Cdk activities

090÷13=959(c8ll PRIZED Horvitz, and Sulston share Physiology or Medicine Nobel (2002) for their discoveries concerning genetic regulation of organ development and programmed cell death
PRIZED Horvitz, and Sulston share Physiology or Medicine Nobel (2002) “for their discoveries concerning genetic regulation of organ development and programmed cell death” 1090 –131= 959(cells)

衰老 机体结构← 细胞增殖 细胞分化 细胞凋亡 细胞信号转导 染色体 (DNA与蛋白质的相互作用)
机体结构 细胞增殖 细胞分化 细胞凋亡 细胞信号转导 染色体 (DNA与蛋白质的相互作用) 衰老


X A Simplified model of (MAP kinas one way that mitogens stimulate cell division CYTOSOL NUCLEUS SCF subunit ouno ncrcgsod increased increased p27 degradation E2F synthesis G Cak activ G./s-cdk act cyclin D-C cyclin E-Cok increased phosphorylation E2F activity ENTHY IN S PHASE
A simplified model of one way that mitogens stimulate cell division

Human cells have a built-in limitation on the number of times they can divide The cell division is cotrolled not only by extracellular mitogens but also by intracellular mechanisms that can limit cell proliferation Cell-cycle arrest excessive Myc production or apoptosis induced by ARF p excessive Mdm2 stimulation of mitogenic stable active p53 pathways 53 DEGRADATION cell-cycle OR apoptosis arrest
Human cells have a built-in limitation on the number of times they can divide The cell division is cotrolled not only by extracellular mitogens but also by intracellular mechanisms that can limit cell proliferation. Cell-cycle arrest or apoptosis induced by excessive stimulation of mitogenic pathways

growth factor th factor Extracellular growth factors receptor stimulate cell growth Activation of cell-surface receptors Pl 3-kinas protein kinase activation Activation of pi 3-kinase active active phosphorylated S6 kinase Activation of elF4E (translation increased mRNA translation initiation factor)and s6 kinase(phosphorylates ribosomal STIMULATION OF CELL GROWTH protein S6) Figure 17-44 One way in which growth factors promote cell growt In this simplified scheme, activation of cell-surface receptors leads to the activation of Pl 3-kinase, which promotes Increasing protein synthesis and cell protein synthesis, at least partly through the activation of elF4E and S6 kinase growth Growth factors also inhibit protein breakdown(not shown) by poorly understood pathway
Extracellular growth factors stimulate cell growth Activation of cell-surface receptors Activation of PI 3-kinase Activation of elF4E (translation initiation factor) and S6 kinase(phosphorylates ribosomal protein S6) Increasing protein synthesis and cell growth

2.Apoptosis, Programmed cell death Biological functions of apoptosis X细胞凋亡是多细胞生物在发育过程中,一种由基因控制 的主动的细胞生理性自杀行为 X In development, homeostasis tumor surveillance and the function of the immune system
2.Apoptosis, Programmed cell death Biological functions of apoptosis In development, homeostasis, tumor surveillance, and the function of the immune system. 细胞凋亡是多细胞生物在发育过程中,一种由基因控制 的主动的细胞生理性自杀行为

apoptotic nerve cells nerve cells nerve 乎甲P学 CELL DEATH MATCHES nerve NUMBER OF cel一 NERVE CELLS axon TO NUMBER OF TARGET CELLS survival factor target cells released by target cells

Morphological and biochemical characteristics of apoptosis Morphologi changes Early Chromosome condensation, cell body shrink Later: Blebbing and Nucleus and cytoplasm fragment- Apoptotic bodies At last: Phagocytosed Mild convolution Nuclear fragmentation compaction and Apoptotic phagocytic segregation Blebbing cell Condensation of Cell fragmentation
Morphological and biochemical characteristics of apoptosis Morphologi changes: Early : Chromosome condensation, cell body shrink Later : Blebbing and Nucleus and cytoplasm fragment— Apoptotic bodies At last: Phagocytosed
按次数下载不扣除下载券;
注册用户24小时内重复下载只扣除一次;
顺序:VIP每日次数-->可用次数-->下载券;
- 北京大学:《分子细胞生物学》课程教学资源(PPT课件讲稿,英文版)Chapter 12 Cell differentiation and Cancer cells.ppt
- 北京大学:《分子细胞生物学》课程教学资源(PPT课件讲稿,英文版)Chapter 11 Cell proliferation and its regulation.ppt
- 北京大学:《分子细胞生物学》课程教学资源(PPT课件讲稿,英文版)Chapter 10 Cytoskeleton System.ppt
- 北京大学:《分子细胞生物学》课程教学资源(教学大纲,共十四章).doc
- 《蛋白质与氨基酸》教学讲义(PPT课件).ppt
- 南京农业大学:《动物生物化学 Animal Biochemistry》精品课程教学资源(PPT课件讲稿)第8章 糖代谢.ppt
- 南京农业大学:《动物生物化学 Animal Biochemistry》精品课程教学资源(PPT课件讲稿)第7章 生物催化剂一酶.ppt
- 南京农业大学:《动物生物化学 Animal Biochemistry》精品课程教学资源(PPT课件讲稿)第6章 生物膜与物质运输.ppt
- 南京农业大学:《动物生物化学 Animal Biochemistry》精品课程教学资源(PPT课件讲稿)第5章 糖类.ppt
- 南京农业大学:《动物生物化学 Animal Biochemistry》精品课程教学资源(PPT课件讲稿)第4章 核酸.ppt
- 南京农业大学:《动物生物化学 Animal Biochemistry》精品课程教学资源(PPT课件讲稿)第3章 蛋白质.ppt
- 南京农业大学:《动物生物化学 Animal Biochemistry》精品课程教学资源(PPT课件讲稿)第2章 生命的化学特征.ppt
- 南京农业大学:《动物生物化学 Animal Biochemistry》精品课程教学资源(PPT课件讲稿)第1章 绪论(主讲:邹思湘).ppt
- 四川农业大学:《生命科学概论》课程教学资源(PPT课件讲稿)人兽共患病.ppt
- 四川农业大学:《生命科学概论》课程教学资源(PPT课件讲稿)展望21世纪的生命科学.ppt
- 四川农业大学:《生命科学概论》课程教学资源(PPT课件讲稿)植物鉴赏与人文精神.ppt
- 《植物与植物生理学》课程PPT教学课件(高职高专)第一章 植物细胞和组织.ppt
- 《植物与植物生理学》课程PPT教学课件(高职高专)第四章 植物的光合作用.ppt
- 《植物与植物生理学》课程PPT教学课件(高职高专)第五章 植物的呼吸作用.ppt
- 《植物与植物生理学》课程PPT教学课件(高职高专)第二章 植物的水分代谢.ppt
- 北京大学:《分子细胞生物学》课程教学资源(PPT课件讲稿,英文版)Chapter 1 Introduction to the cell.ppt
- 北京大学:《分子细胞生物学》课程教学资源(PPT课件讲稿,英文版)第二章 细胞基本知识概要.ppt
- 北京大学:《分子细胞生物学》课程教学资源(PPT课件讲稿,英文版)Chapter 3 Techniques in Cell Biology.ppt
- 北京大学:《分子细胞生物学》课程教学资源(PPT课件讲稿,英文版)Chapter 4 Cell Membrane and Cell Surface.ppt
- 北京大学:《分子细胞生物学》课程教学资源(PPT课件讲稿,英文版)Chapter 5A. The Movement of Substances Across cell membranes.ppt
- 北京大学:《分子细胞生物学》课程教学资源(PPT课件讲稿,英文版)Chapter 6 Cytoplasmic matrix, Endomembrane system.ppt
- 北京大学:《分子细胞生物学》课程教学资源(PPT课件讲稿,英文版)Chapter 7 Energy Generation in Mitochondria and Chloroplasts.ppt
- 北京大学:《分子细胞生物学》课程教学资源(PPT课件讲稿,英文版)Chapter 8 Nucleus and chromosomes.ppt
- 北京大学:《分子细胞生物学》课程教学资源(PPT课件讲稿,英文版)第九章 核糖体(ribosome).ppt
- 北京大学:《分子细胞生物学》课程教学资源(PPT课件讲稿,英文版)细胞生物学参考文献.doc
- 北京大学:《分子细胞生物学》课程教学资源(练习题).doc
- 南京农业大学:《动物生物化学 Animal Biochemistry》精品课程教学资源(PPT课件讲稿)第7章 基因表达的调节.ppt
- 贵州大学:《DNA与基因表达调控》专题七DNA与基因表达调控.ppt
- 信阳农林学院:《动物病理学》绪论.ppt
- 信阳农林学院:《动物病理学》第二章 病因学.ppt
- 信阳农林学院:《动物病理学》第三章 发病学.ppt
- 信阳农林学院:《动物病理学》第一章 疾病学.ppt
- 武汉大学生命科学学院:《分子生物学》英文版 Gene cloning, expression and functional study 基因克隆,表达及功能研究.ppt
- 武汉大学生命科学学院:《分子生物学》英文版 CHAPTER 6 Molecular Biology of the Gene.ppt
- 武汉大学生命科学学院:《分子生物学》英文版 CHAPTER 7 Maintenance of the genome.ppt