上两期,我们一起学习了如何解析文献中的内皮细胞成管实验图(细胞与分子生物学系列合集),也收到大家的反馈说,能否穿插细胞共性实验,那我们今天就来学习一下验证细胞收缩特性的胶原凝胶收缩实验吧。
胶原凝胶收缩实验就可以实现细胞收缩力的可视化,它的原理可大致分为以下几步:
分析:敲减血管平滑肌细胞(VSMCs)PHB2后减弱其收缩能力。
原文:In addition, Phb2
siRNA-transfected VSMCs exhibited reduced contractility compared with scrambled
siRNA-transfected VSMCs, as evidenced by a collagen gel contraction assay
(siRNA scramble versus siRNA Phb2: 46.3±3.86% versus 71.2±4.35%, P<0.05)
(Figure 3D).
图注:D, Scrambled siRNA (20
nM) or Phb2 siRNA (20 nM) transfected primary rat VSMCs were cultured for 48 h
and then harvested and mixed with ice-cold collagen at a ratio of 1:4 for
another 24 h followed by the evaluation of the size of collagen gel (n=4).
分析:在TGFβ处理的成纤维细胞中,敲低Meox1可以减弱胶原凝胶收缩。
原文:Moreover, Meox1 depletion attenuated
TGFβ-stimulated collagen-gel contraction and EdU incorporation, two functional
hallmarks of myofibroblasts in disease pathogenesis (Fig. 4a and Extended Data
Fig. 11e).
图注:a. Images and
quantification (n=4 per condition) of fibroblasts seeded on compressible
collagen gel matrices in Unstim or TGFβ conditions with a control or a
Meox1-targeting siRNA. Two-way ANOVA followed by Bonferroni correction for TGFβ
siCtrl vs. TGFβ siMeox1. **p-val=0.0082 (24h), **p-val =0.0015 (48h) and ****p-val
=2.21e−5 (72h).
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