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. 2022 Jun 9;13:898139. doi: 10.3389/fendo.2022.898139

Figure 2.

Figure 2

Hypothalamic estrogen acts on the VMH-AMPK-SNS-BAT axis to regulate thermogenesis. Estrogen represses AMPK signaling in the vlVMH to subsequently stimulate sympathetic activity. In the BAT, β3-AR activation induces lipolysis. The resulting FFA are oxidized in the mitochondria, providing the fuel for heat production by UCP1 activity. E2, estrogen; PVN, paraventricular hypothalamic nucleus; DMH, dorsomedial hypothalamus; LH, lateral hypothalamus; ARH, arcuate hypothalamic nucleus; VMH, ventromedial hypothalamus; dmVMH, dorsomedial VMH; cVMH, central VMH; vlVMH, ventrolateral CMH; IO, inferior olive; RPa, raphe pallidus; FFA, free fatty acid; UCP1, uncoupling protein 1. Adapted from (21), created by (194).