METTL14-mediated m6A differentially orchestrates brown and white adipose tissue transcriptomes to regulate systemic metabolism

Human brown and white adipocytes (hBAT and hWAT) display markedly distinct m6A landscapes; besides, in insulin-resistant humans and mice, methyltransferase like 14 (METTL14) expression differs significantly between BAT and WAT in the context of its correlation with insulin sensitivity. We therefore employed independent BAT- and WAT-specific METTL14 knockout models to unveil the cell-type specificity of m6A mRNA methylation. Mettl14 knockout via Ucp1-cre or Adipoq-cre drivers in BAT and WAT, respectively, yields divergent metabolic outcomes in mouse.