Manoj Kumar Yadav, Megumi Ishida, Natalia Gogoleva, Ching-Wei Liao, Filiani Natalia Salim, Maho Kanai, Akihiro Kuno, Takuto Hayashi, Zeynab Javanfekr Shahri, Kaushalya Kulathunga, Omar Samir, Wenxin Lyu, Olivia Olivia, Evaristus C Mbanefo, Satoru Takahashi, Michito Hamada
Transcription factor MAFB regulates various homeostatic functions of macrophages. This study explores the role of MAFB in brown adipose tissue (BAT) thermogenesis using macrophage-specific Mafb-deficient (Mafbf/f ::LysM-Cre) mice. We find that Mafb deficiency in macrophages reduces thermogenesis, energy expenditure, and sympathetic neuron (SN) density in BAT under cold conditions. This phenotype features a proinflammatory environment that is characterized by macrophage/granulocyte accumulation, increases in interleukin-6 (IL-6) production, and IL-6 trans-signaling, which lead to decreases in nerve growth factor (NGF) expression and reduction in SN density in BAT...
March 22, 2024: Cell Reports