sue already at 7 d time point in the areas with prominent tissue growth. In both groups, the vessel density decreased during the second week of granulation tissue growth and increased again during the third week. CD34 positive microvessels were abundantly present in both WT and MMP-13 in Wound Granulation Tissue revealed that a section of every granulation tissue sample contained in average 14 and 2 large vessels in WT and Mmp132/2 mouse granulation tissue, respectively. Comparison of gene expression profiles between Mmp132/2 and WT mouse granulation tissue Mmp132/2 mouse granulation tissue in all time points examined. Interestingly, microvessel density was higher in Mmp132/2 mouse granulation tissue at 14 d, reflecting enhanced neovascularization or reduced resolution. The density of the medium sized vessels was similar in WT and Mmp132/2 tissue in all time points examined. A striking difference in vascular pattern was also noted at 21 d, when the Mmp132/2 granulation tissue was characterized by almost total absence of large vessels, likely to represent venules or arterioles, which in contrast, were commonly present in WT mouse granulation tissue . Determination of the total number of large vessels at 21 d time point MMP-13 in Wound Granulation Tissue angiogenesis, were significantly downregulated PubMed ID:http://www.ncbi.nlm.nih.gov/pubmed/22212565 in all time points examined in Mmp132/2 mice. In contrast, Cadm1 which is shown to regulate epidermal wound healing was systematically upregulated in all time points. Pathway analysis of differentially expressed genes in Mmp132/2 and WT mouse granulation tissue To elucidate the biological processes involved in the delayed granulation tissue growth in Mmp132/2 mice, the different gene expression profiles at specific time points were subjected to Ingenuity Pathway Analysis. This analysis of molecular relations was performed based on the genes that differed between the data sets with FC.0.5 and P,0.05. Several of the differentially expressed genes included in the gene lists in with the increased density of microvessels noted in Mmp132/2 granulation tissue at 14 d by IHC. At 14 d, the differentially expressed genes were highly significantly associated with the biofunctions such as migration of cells, immune response, cell death, proliferation of cells and fibrosis in Mmp132/2 granulation tissue compared to WT. Several biofunctions associated with inflammation were significantly MedChemExpress AS-703026 down-regulated in 
Mmp132/2 granulation tissues as compared to WT: cell movement of leukocytes, cell movement of granulocytes, cell movement of neutrophils, inflammatory response, and adhesion of immune cells. The network of molecules involved in the biofunction cell movement of leukocytes in the data set created with IPA included IL-6, MMP-9, and MMP-2 among other inflammation regulatory molecules. In accordance with the marked downregulation of several MMPs in Mmp132/2 tissue, functional analysis predicted the biofunctions proteolysis and metabolism of protein to be significantly downregulated . The network of molecules involved in the biofunction metabolism of protein in the data set also included IL-6, as well as MMP-9, and MMP-2, and MMP-3. In general, the functional analysis of differentially regulated genes at 14 d time point suggests that inflammation is clearly downregulated in Mmp132/2 granulation tissue although tissue ingrowth is not significantly delayed at this time point. Functional analysis of the differentially expressed genes in Mmp132/2 and WT granulation
