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. Author manuscript; available in PMC: 2011 Jul 1.
Published in final edited form as: Microvasc Res. 2010 Mar 8;80(1):23–30. doi: 10.1016/j.mvr.2010.03.001

Fig. 1.

Fig. 1

3D collagen matrix physical properties varied with collagen concentration. Fibril density increased linearly with collagen concentration as shown in 3D CRM images of 0.5 (A) and 2.5 (B) mg/ml matrices (scale bar = 10 μm). Shear storage modulus (G′ lines = linear regression trend lines), increased with increasing collagen concentration (p<0.05 between concentrations, n=3–5 for mechanical analyses) and with the addition of ECFCs (2 × 106cells/ml, gray lines, p<0.05 at each concentration except 3.5 mg/ml). Matrix fluid-like behavior, indicated by δ (D), was significantly affected by collagen concentration (* denotes p<0.05 within cell groups) and ECFC addition (p<0.05 at each concentration except 1.5 mg/ml). Matrix Ec (E) similarly increased with collagen concentration (* denotes p<0.05 within cell groups), but did not change significantly with ECFC addition (p>0.05 at all concentrations).