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ABSTRACT 8

Ⅰ. INTRODUCTION 10

Ⅱ. MATERIALS AND METHODS 16

1. Chemicals and Reagents 16

2. Instruments 17

3. Cell Culture 18

4. Flow cytometry analysis 18

5. Assay of Intracellular H₂O₂ 19

6. PKC activity assay 19

7. Western blotting 20

8. 2-Dimensional analysis and Mass spectrometric analysis 21

Ⅲ. RESULTS 23

1. Generation of ROS by PMA 23

2. Direct Effect of ROS on megakaryocytic differentiation of K562 cells 28

3. Effect of ROS in translocation of PKC to membrane on megakaryocytic differentiation of K562 cells 32

4. Effect of ROS in activation of ERK on megakaryocytic differentiation of K562 cells 35

5. Differentiation pattern of human erythroleukemia K562 cells by glucose oxidase 38

6. Gene expression changes by ROS in megakaryocytic differentiation of K562 cells 41

Ⅳ. DISCUSSION 44

Ⅴ. REFERENCES 54

Ⅵ. 논문개요 70

그림목차

Fig. 1 PMA induces the megakaryocytic differentiation of K562 cells 25

Fig. 2 Generation of ROS by PMA 26

Fig. 3 Inhibition of megakaryocytic differentiation of K562 cells by antioxidants 27

Fig. 4 H₂O₂ induces the megakaryocytic differentiation of K562 cells 30

Fig. 5 Inhibition of H₂O₂-induced megakaryocytic differentiation of K562 cells by antioxidants 31

Fig. 6 Activation of PKC by H₂O₂ on megakaryocytic differentiation of the K562 cells 33

Fig. 7 Inhibition of CD41 expression by PKC inhibitor, GF109203X, on ROS-induced megakaryocytic differentiation of the K562 cells 34

Fig. 8 Activation of ERK activity by H₂O₂ on megakaryocytic differentiation of the K562 cell line 36

Fig. 9 Inhibition of CD41 expression by ERK inhibitor, PD98059, on megakaryocytic differentiation of K562 cells 37

Fig. 10 Differentiation pattern of ROS-induced differentiation of K562 cells 40

Fig. 11 Detection of glucose oxidase-responsive protein in K562 cells 42

Fig. 12 Mass spectrometirc analysis of changed protein spots 43

Fig. 13 Scheme of megakaryocytic differentiation of K562 cells 53