MMP12 and infection: However, in response to infection, male mice exhibited higher expression levels of CDKN1B, and CTNNB1 (KO, 1A3), TCF4 (1A0, 6A2), TAP1, and TAP2, (1A0), CDKN1A, (1A3, 6A2), MARCO, and MMP12 (1A3), CCND1, CDK2, IRF and MYC (6A2) compared to females (Figure 8).