New York University Langone Medical Center, Cancer Institute, New York, NY, USA.
Cancer Cell. 2011 Mar 8;19(3):333-46. doi: 10.1016/j.ccr.2011.01.037.
Matrix metalloproteinase-2 (MMP-2) is a proteolytic enzyme degrading the extracellular matrix and overexpressed by many tumors. Here, we documented the presence of MMP-2-specific CD4(+) T cells in tumor-infiltrating lymphocytes (TILs) from melanoma patients. Strikingly, MMP-2-specific CD4(+) T cells displayed an inflammatory T(H)2 profile, i.e., mainly secreting TNF-α, IL-4, and IL-13 and expressing GATA-3. Furthermore, MMP-2-conditioned dendritic cells (DCs) primed naïve CD4(+) T cells to differentiate into an inflammatory T(H)2 phenotype through OX40L expression and inhibition of IL-12p70 production. MMP-2 degrades the type I IFN receptor, thereby preventing STAT1 phosphorylation, which is necessary for IL-12p35 production. Active MMP-2, therefore, acts as an endogenous type 2 "conditioner" and may play a role in the observed prevalence of detrimental type 2 responses in melanoma.
基质金属蛋白酶-2(MMP-2)是一种蛋白水解酶,可降解细胞外基质,许多肿瘤均过度表达 MMP-2。在此,我们在黑色素瘤患者肿瘤浸润淋巴细胞(TIL)中记录到 MMP-2 特异性 CD4+T 细胞的存在。值得注意的是,MMP-2 特异性 CD4+T 细胞表现出炎症性 T(H)2 表型,即主要分泌 TNF-α、IL-4 和 IL-13,并表达 GATA-3。此外,MMP-2 条件化树突状细胞(DC)通过 OX40L 表达和抑制 IL-12p70 产生,将幼稚 CD4+T 细胞初始化为炎症性 T(H)2 表型。MMP-2 降解 I 型 IFN 受体,从而阻止 STAT1 磷酸化,而 STAT1 磷酸化是 IL-12p35 产生所必需的。因此,活性 MMP-2 作为内源性 2 型“调节剂”,可能在黑色素瘤中观察到的有害 2 型反应的流行中发挥作用。