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本論文永久網址
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複製永久網址
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研究生:
許韶容
研究生(外文):
Shao-Jung Shu
論文名稱:
基材軟硬度對上皮細胞及纖維母細胞之黏著力的影響
論文名稱(外文):
Substratum Rigidity Effects on Quantitative Cell Adhesion of Epithelial Cells and Fibroblasts
指導教授:
蘇芳慶
指導教授(外文):
Fong-Chin Su
學位類別:
碩士
校院名稱:
國立成功大學
系所名稱:
醫學工程研究所碩博士班
學門:
工程學門
學類:
綜合工程學類
論文種類:
學術論文
論文出版年:
2007
畢業學年度:
95
語文別:
中文
論文頁數:
69
中文關鍵詞:
纖維母細胞
、
上皮細胞
、
基材軟硬度
、
細胞黏著力
外文關鍵詞:
epithelial cell
、
fibroblast
、
substratum rigidity
、
cell adhesion force
相關次數:
被引用:0
點閱:292
評分:
下載:0
書目收藏:0
細胞黏著是細胞生理重要的功能行為,影響細胞型態、細胞攤附、細胞移動、運動及分化等。黏著行為會受到細胞本身生理調控及外界環境的影響,而區域黏著增加細胞與基材間的黏著能力,也是大部分力量來源,它可調節細胞骨架結構與胞外基質的連結進而改變細胞內張力,甚至觸發訊息傳遞路徑改變細胞功能。
本研究欲探討不同硬度基材與細胞黏著的關係。每種細胞對基材軟硬度的感知或反應皆有不同,目前已知在軟基材上細胞凋亡反應的差異:極性細胞有明顯的凋亡反應,纖維母細胞則不明顯。因此本實驗量化此兩種細胞的細胞黏著,並分析在不同硬度基材上此兩種細胞的面積、黏著力,及黏著應力的表現。實驗中選用極性上皮細胞-LLC-PK1與纖維母細胞-NIH-3T3,在三種不同硬度(1000 Pa、10000 Pa、玻璃基材)並塗佈第一型膠原蛋白的基材上,經過六小時的培養,利用細胞刮取機構量測單顆細胞的細胞黏著力,計算出細胞面積並求得單位面積的細胞黏著力-黏著應力。
實驗結果顯示,種植培養六小時後,隨著基材硬度的增加,細胞面積及細胞黏著力都有增加的趨勢。細胞黏著應力在1000 Pa、10000 Pa及玻璃基材上,3T3的應力大小分別是825.23±215.97、991.97±368.26、1231.86±359.70 Pa;而PK1的大小為911.32±254.79、920.36±173.87、960.83±321.14 Pa。同樣的,黏著應力也會隨基材硬度增加而增加。利用“單因子變異數分析”統計方法分析在三種不同硬度細胞的變異性:兩種細胞在細胞攤附面積與黏著力上都有顯著差異;而黏著應力方面,3T3有顯著差異,PK1則沒有。
另外,利用黏著力量-位移曲線圖,計算曲線下面積,求得細胞與基材分離的刮取能量-功,並計算單位面積的功。在1000 Pa、10000 Pa及玻璃基材上,3T3的做功量與單位面積功分別是3.83±1.24、5.09±1.12、5.55±1.84(10-12J);11.55±4.39、16.66±4.66、12.14±3.74(10-3 J/m2)。PK1的大小為11.37±2.42、16.70±6.56、18.97±7.22(10-12J);23.10±8.75、22.38±12.22、30.65±13.58(10-3 J/m2)。
Cell adhesion plays a critical role in cell physiology functions, which influences morphology, spreading, migration, and differentiation, etc. The adhesion is affected by intracellular regulations and extracellular environment. Most of the adhesion to extracellular matrix is derived from focal adhesions, which enhance adhesion, functioning as structural links between the extracellular matrix and the cytoskeleton that regulates intracellular tension, and direct cell function by triggering signaling pathways.
In this study, the relationship between different substratum rigidity and cell adhesion was investigated. The sensibility and reaction to different substratum rigidity differ from kinds of cells. Several studies have shown that apoptosis would be induced while certain kinds of polarized cells were seeded on soft substrate, but not fibroblasts. To understand effects of the substrate rigidity on cell behaviors, the adhesion force was measured quantitatively between cells and collagen-coated substrates with different rigidity in two types of cells, and also cell spreading area, adhesion force, and adhesion stress were analyzed. In the experiments, the epithelia cell, (LLC-PK1), and fibroblast, (NIH-3T3), were seeded on collagen-coated polyacrylamide substrates with rigidity 1000, 10000Pa and glass surface (control group), respectively. After 6 hours of seeding, the adhesion force was measured by cytodetachment technique, and cell area was also detected. Therefore, the cell adhesion force per unit area, defined as adhesion stress, was figured out.
The results show that the cell spreading area and adhesion force increased with increasing rigidity. The cell adhesion stress at 6 hour seeding was 825.23±215.97, 991.97±368.26, and 1231.86±359.70 Pa on substratum rigidity 1000, 10000Pa, and glass, respectively, for 3T3, and they are 911.32±254.79, 920.36±173.87, and 960.83±321.14 Pa for PK1. Also, the adhesion stress increased with increasing rigidity. The one-way ANOVA analysis shows significant differences in spreading area and adhesion force among three different rigidity substrates for 3T3 and PK1. However, the cell adhesion stress has significant difference in 3T3 but not for pk1 among different substrate.
Besides, the detachment energy (work) was obtained by integrating the area of the adhesion force-distance curve, and the normalized work was also found by dividing cell area. For 3T3, the detachment work and the work per unit area was 3.83±1.24, 5.09±1.12, 5.55±1.84 (10-12J) and 11.55±4.39, 16.66±4.66, 12.14±3.74 (10-3 J/m2) on substratum rigidity 1000, 10000Pa, and glass. For PK1, they are 11.37±2.42, 16.70±6.56, 18.97±7.22 (10-12J) and 23.10±8.75, 22.38±12.22, 30.65±13.58 (10-3 J/m2).
中文摘要 I
Abstract III
誌謝 V
目錄 VI
表目錄 IX
圖目錄 X
第一章 緒論 1
1.1 細胞黏著力 1
1.1.1 細胞與基材之交互作用 1
1.1.2 細胞與基材黏著力之量測 3
1.1.3 生長環境影響細胞黏著力 5
1.2 基材軟硬度 6
1.2.1 基材軟硬度對細胞的影響 6
1.2.2 細胞黏著力與基材軟硬度的關 11
1.3 實驗動機與目的 12
1.3.1 實驗假說 13
第二章 實驗方法 14
2.1 細胞培養 14
2.1.1 小鼠纖維母細胞株(NIH-3T3)培養 14
2.1.2 豬腎前曲小管上皮細胞株(LLC-PK1)培養 15
2.2 基材製備 15
2.3 實驗儀器 19
2.3.1 顯微鏡工作平台(Microscope Working Station) 19
2.3.2 細胞刮取機構 21
2.3.3 溫度控制系統 24
2.4 影像處理與分析 27
2.4.1 細胞貼附面積計算 27
2.4.2 細胞黏著力量原理與計算 28
2.5 統計分析 31
2.6 實驗設計 32
2.7 實驗流程 34
第三章 結果 35
3.1 細胞生長在不同軟硬度基材上的型態表現 35
3.2 不同基材硬度下細胞面積的大小 38
3.3 細胞刮取與機構改良成果 40
3.4 細胞黏著力 42
3.5 細胞黏著應力 44
3.6 細胞黏著力與細胞面積的相關性(correlations) 46
3.7 細胞黏著應力與細胞面積的相關性 48
3.8 計算細胞刮取過程總功(work) 50
第四章 討論 53
4.1 實驗結果的討論 53
4.1.1 標準差的變異性大 53
4.1.2 基材硬度對細胞攤附面積的影響 53
4.1.3 基材硬度對細胞黏著力及黏著應力的影響 54
4.1.4 相關性討論 56
4.1.5 刮取做功量討論 57
4.2 討論細胞黏著與細胞生死 58
4.3 基材結構的穩定性 60
4.4 實驗進行時應注意事項 61
4.4.1 基材製備過程 61
4.4.2 細胞種植 61
4.4.3 進行刮取實驗 61
4.5 實驗限制(limitation)因素 63
4.5.1 探針懸桿限制及探針K值選擇 63
4.5.2 基材軟硬度選擇上的限制 63
4.5.3 儀器限制 63
4.5.4 影像處理及解析度(resolution) 65
第五章 結論 66
第六章 參考文獻 68
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