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The “Domino Theory” of Hunger: The Hypothalamus Is Hot
Charles V. Mobbs Cell Metabolism Volume 5, Issue 1, Pages 1-2 (January 2007) DOI: /j.cmet Copyright © 2007 Elsevier Inc. Terms and Conditions
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Figure 1 The “Domino Theory” of Hunger
Food deprivation reduces the production of leptin by fat. This removes the inhibitory effect of leptin on corticosterone secretion by the adrenal gland (through a mechanism still unresolved), leading to increased corticosterone secretion. The increased corticosterone stimulates the production of type 2 deiodinase in hypothalamic tanycytes, leading to increased local production of T3. T3 diffuses to nearby NPY/AgRP neurons (adjacent, but shown spatially separate here for clarity), where it stimulates UCP2 production. Abrogation of any of these steps attenuates several neuroendocrine responses to fasting. Cell Metabolism 2007 5, 1-2DOI: ( /j.cmet ) Copyright © 2007 Elsevier Inc. Terms and Conditions
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