Lipid Droplets Accumulate in the Hypothalamus of Mice and Humans with and without Metabolic Diseases

C.M. Maya-Monteiro*, F. Correa-da-Silva, S.S. Hofmann, M.K.C. Hesselink, S.E. la Fleur, C.X. Yi*

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

3 Citations (Web of Science)

Abstract

Background: In peripheral tissues, the lipid droplet (LD) organelle links lipid metabolism, inflammation, and insulin resistance. Little is known about the brain LDs. Objectives: We hypothesized that hypothalamic LDs would be altered in metabolic diseases. Methods: We used immunofluorescence labeling of the specific LD protein, PLIN2, as the approach to visualize and quantify LDs. Results: LDs were abundant in the hypothalamic third ventricle wall layer with similar heterogeneous distributions between control mice and humans. The LD content was enhanced by high-fat diet (HFD) in both wild-type and in low-density lipoprotein receptor deficient (Ldlr -/- HFD) mice. Strikingly, we observed a lower LD amount in type 2 diabetes mellitus (T2DM) patients when compared with non-T2DM patients. Conclusions: LDs accumulate in the normal hypothalamus, with similar distributions in human and mouse. Moreover, metabolic diseases differently modify LD content in mouse and human. Our results suggest that hypothalamic LD accumulation is an important target to the study of metabolism.
Original languageEnglish
Pages (from-to)263-272
Number of pages10
JournalNeuroendocrinology
Volume111
Issue number3
DOIs
Publication statusPublished - 1 Feb 2021

Keywords

  • hypothalamus
  • insulin resistance
  • lipid droplet
  • plin2
  • type 2 diabetes mellitus
  • Lipid droplet
  • Insulin resistance
  • PLIN2
  • Type 2 diabetes mellitus
  • Hypothalamus

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