Cells progress into the cell cycle when they are anchored to the extracellular matrix and stimulated by growth factors.18 To investigate whether cortical branched actin transmits these stimuli, we analysed potentiated cells with increased cortical branched actin, through either RAC1 Q61L expression, ARPIN depletion, or ARPC1B overexpression.
Ultrastructural analysis of elastin matrix within cultures treated with HA oligomers and 400 ng ml−1 of CuNPs suggest that elastin matrix deposition as stimulated by Cu2+ ions proceeds via a fibrillin-mediated assembly process, with enhanced crosslinking occurring via stimulation of lysyl oxidase.
Several matrix dehydrogenases are stimulated by Ca2+.
Cellular hypertrophy and matrix production are stimulated by high glucose concentrations in tissue culture studies.
The synthesis of NP matrix can be stimulated by means of growth factors and/or gene therapy.
Matrix metalloproteinases (MMPs), stimulated by relaxin, convert Big Endothelin to its bioactive form, Endothelin1 32, and are required for relaxin-mediated vasodilation [ 40].
For example, it has been suggested that certain matrix metalloproteases are stimulated by the presence of CHAP (McCarthy et al, 1992; Reuben et al, 2002; Sun et al, 2003; Zeng et al, 2003).
However, we did not find an effect of WNT/β-catenin inhibition on recovery of basal gene expression levels of extracellular matrix components Acan and Col2a1 after the use of IL-1β/TNFα, indicating that the synthesis of new extracellular matrix is not stimulated by small molecule inhibition.
We have modified the diagram shown as Figure 4 in the manuscript to try to make it more clear that extracellular matrix is not stimulated by TNF- α but is a "catalyst" of sorts of DAMPs due to degradation of ECM by TNF- α.
These previously published studies are consistent with our data showing macrophage number was reduced in tamoxifen-treated mammary glands, in vitro macrophage motility suppressed by tamoxifen matrix and macrophage motility stimulated by the addition of exogenous fibronectin and denatured collagen; ECM proteins prominent in control mammary matrix.
