Tet2 deficiency enhances Ccl2 and Ccl8 mRNA stability by modifying 5hmC-dependent RNA–protein interactions. (A and B)Ccl2 (A) and Ccl8 (B) mRNA decay in Tet2^+/+ and Tet2^−/− MDMs (n = 6 for each group). (C)Tet2-mediated oxidation of Ccl2 and Ccl8 mRNA 5mC disrupts its binding with Ybx1, Elavl1, and Zfp36. Pull-down assay was performed by incubating C, 5mC, and 5hmC oligos of Ccl2 and Ccl8 mRNA with cell lysate from THP1-derived pMDMs (n = 3 for each group). (D) Effect of Tet2 deficiency on the binding enrichment of Ybx1, Elavl1, and Zfp36 at 3′UTR of Ccl2 and Ccl8 mRNA. Tet2-binding sites were mapped in the mRNA of Ccl2 and Ccl8 by qPCR of Ybx1, Elavl1, and Zfp36 RIP product in THP1-derived pMDMs (n = 3 for each group). (E and F) Effect of enzymatic inactivation of Tet2 via catalytic domain mutation on stabilization of Ccl2 (F) and Ccl8 (G) transcripts (n = 4 for each group). Data are the accumulative results from at least two independent experiments (A, B, D, E, and F) or are representative of at least two independent experiments with similar results (C and D). All data are shown as mean ± SD and were analyzed by two-tailed, unpaired Student’s t test (A, B, and D–F). ***P < 0.001; **P < 0.01; *P < 0.05; P > 0.05 not significant (ns). Source data are available for this figure: SourceData F7.