Wildtype and NRP1 knockout macrophages

Obesity gives rise to metabolic complications by mechanisms that are poorly understood. While chronic inflammatory signaling in adipose tissue is typically associated with metabolic deficiencies linked to excessive weight gain, we identified a subset of NRP1-expressing myeloid cells that accumulate in adipose tissue and protect against obesity and metabolic syndrome. Ablation of NRP1 in macrophages compromised lipid uptake in these cells, which reduced substrates for fatty acid β-oxidation and shifted energy metabolism of these macrophages towards a more inflammatory glycolytic metabolism. Conditional deletion of NRP1 in LysM Cre-expressing cells lead to inadequate adipose vascularization, accelerated weight gain and reduced insulin sensitivity even independent of weight gain. Transfer of NRP1+ hematopoietic cells improved glucose homeostasis, resulting in the reversal of a prediabetic phenotype. Our findings suggest a pivotal role for adipose tissue resident NRP1+-expressing macrophages in driving healthy weight gain and maintaining glucose tolerance. 2 samples were analyzed: wildtype macrophages (3 replicates), and NRP1 deficient macrophages (2 replicates) Raw data available only for sample GSM2991368 (Wildtype 3).