TLR1/TLR2 signaling blocks the suppression of monocytic myeloid-derived suppressor cell by promoting its differentiation into M1-type macrophage
In this study, we found that TLR1/TLR2 expression predicted favorable prognosis of lung cancer patients. In the related mice tumor model, TLR1/TLR2 activation by synthetic bacterial lipoprotein (BLP), a TLR1/2 agonist, greatly inhibited tumor growth and selectively decreased monocytic MDSCs (M-MDSCs). Furthermore, BLP treatment redirected M-MDSC differentiation towards M1 macrophage through JNK pathway, and thus blocked the suppressive activity of M-MDSCs in a TLR2-dependent manner. Therefore, our data demonstrated that TLR2 could be a promising biomarker and a potential immunotherapeutic target for lung cancer.
Source: Molecular Immunology - Category: Allergy & Immunology Source Type: research