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. 2022 Apr 4;13:857727. doi: 10.3389/fimmu.2022.857727

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Copyright © 2022 Li, Teng, Jiang, Zhang, Luo, Liao and Yang

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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m6A methylation: the m6A writer METTL3 and the reader YTHDF1 are upregulated in TP-infected macrophages. (A) Colorimetric quantification of m6A methylation in RNA from THP-1 cells with or without TP infection. (B, C) Western blot analysis of METTL3, METTL14, and YTHDF1 in THP-1 cells with or without TP infection. GAPDH was used as a control. *P < 0.05, **P < 0.01. (D, E) Immunofluorescence analysis of YTHDF1 or METTL3 in CD68+ macrophages in secondary syphilitic lesions and paired non-lesional skin tissue. Scale bar: 20 μm or 5 μm.