MMP9 and neoplasm: Furthermore, tumor donors with the high-expressing MMP-3 5A/5A genotype exhibited higher IPC compared with 6A/5A and 6A/6A donor genotypes, (p = 0.05 and 0.07, respectively) (Figure 4b.ii), although no relationship was demonstrated between MMP-9 genotype and donor IPC (Figure 4c.ii).