微米晶片在细胞生物学上的应用

1、微米晶片在細胞生物學上的應用細胞研究:細胞研究的方向。細胞生長環境。細胞微環境的因素。生物科技的劣勢。演講者:陳俊男 07.27.2005生物技術DNA: agarose 電泳(McDonell, 1977), Southern blot, clone, PCR(1971).RNA: RT-PCR(1988), Northern blot(1994).Protein: SDS page(1960), western blot(1979)Proteomics: 2D Electrophoresis(1970s).Proteomics Processes生物科技的缺點:1.耗時2.費人力3.高成本

2、4.無法在微米尺度細操控細胞,細菌5.無法及時觀徹細胞生理狀況(real time)微米級晶片的新工具- 微流道微流道晶片(lab-On-a Chip)陣列式晶片 晶片的應用55 C.72 C95 C.cBLOOD-ON-A-CHIPC. right pole :Mitotracker Green FM ; left pole :Mitotracker Red CM-H2XRos. entire cell: DNA-binding dye Hoechst 33342. D. 2.5 hrs later E. Blue region: latrunculin = cause the disrup

3、tion of actin filament F. PhalloidinAlexa 594-labelled , and 10 min latter , treatment with latrunculin A.Figure 1Chemotaxis. Figure 2 ElastomericMembranes,(Bovine adrenal capillary endothelial cell)Figure 3. (a) A cell spread on a square 30 um 30 um island; the cell was stimulated with platelet-der

4、ived growth factor (PDGF) and stainedfor F-actin with fluorophore-labeled phalloidin. (b) Cells confined to various shapes (all with areas of 900 um2) were stimulated with PDGF and stained with phalloidin and 4 -6-diamidino-2-phenylindole tovisualize F-actin (green) and nuclei (blue). Images obtaine

5、d by fluorescence microscopy. 18 min of a living fibroblast after stimulation with PDGF. fibroblast, coated with fibronectin, stained with fluoresceinated phalloidin (C) Endothelial cell, coated with fibronectin, stained with fluoresceinated phalloidin (D) skeletal C2C12 myoblast, coated thrombospon

6、din-1, stained with anti-fascin antibodies . A, B) 30 30 m island; C, D) 40 40 m islands. Figure 4. Elastomeric silicone microposts a substrate to cellular contractions. (a) cells adhere to the tips of an array of closely spaced.(b) SEM showing a cell attached to the entire micropost substrate(c) il

7、lustration showing the process for microprinting adhesive proteins on the microposts. (d) Differential interference contrast (top) and immunofluorescence (bottom) micrographs :2 x 2 array of posts printed with fibronectin. (e), cells only attach on the tips. Scale bars indicate 10 m.Figure 5. Bovine

8、 capillary endothelial cells were initially on rectangular patterns using (SAMs) monolayers surrounded by ethylene-glycolterminated (EG-terminated) SAMs. Application of a cathodic voltage pulse (1.2 V for 30 s) released the cells from the constraints of the microislands by desorbing the EG-terminate

9、d SAMs and enabling proteins to adsorb from the culture medium that allowed the attachment and movement of cells. The numbers indicate the time elapsed (in minutes) after the voltage pulse.Figure 6. (a) Agarose is wicked into channels formed by a poly(dimethylsiloxane) stamp sealed against a glass c

10、overslip and allowed to gel before the stamp is peeled off. (b) When cells are seeded onto these substrates containing bowtie-shaped wells, cells attach and culture as either single cells or pairs. (c) The single cell-to-cell contact formed in these pairs can be blocked by fabricating substrates in which the agarose for