Palmitoleic Acid Acts on Adipose-Derived Stromal Cells and Promotes Anti-Hypertrophic and Anti-Inflammatory Effects in Obese Mice

Author(s)

Simao, Jussara J. ; Cruz, Maysa M. ; Abdala, Fernanda M. ; Bolsoni-Lopes, Andressa ; Armelin-Correa, Lucia ; Alonso-Vale, Maria Isabel C.

• Document type: Journal article
• Source: PHARMACEUTICALS; v. 15, n. 10, p. 14-pg., 2022-10-01.

Abstract

Adipose tissue (AT) secretes adipokines, modulators of low-grade chronic inflammation in obesity. Molecules that induce the emergence of new and functional adipocytes in AT can alleviate or prevent inflammatory and metabolic disorders. The objective of this study was to investigate the role of palmitoleic acid (n7) in 3T3-L1 and primary pre-adipocyte differentiation and AT inflammation. C57BL/6j mice were submitted to a control or high-fat diet (HFD) for 8 weeks, and treated with n7 for 4 weeks. Mice consuming a HFD presented an increase in body weight, epididymal (Epi) fat mass, and Epi adipocytes size. N7 treatment attenuated the body weight gain and completely prevented the hypertrophy of Epi adipocytes, but not the increment in Epi mass induced by the HFD, suggesting a greater adipocytes hyperplasia in animals treated with n7. It was agreed that n7 increased 3T3-L1 proliferation and differentiation, as well as the expression of genes involved in adipogenesis, such as Cebpa, Pparg, aP2, Perilipin, and Scl2a4. Furthermore, n7 decreased the inflammatory cytokines Mcp1, Tnfa, Il6, Cxcl10, and Nos2 genes in Epi vascular stromal cells, but not in the whole AT. These findings show that n7 exerts anti-hypertrophic effects in adipocytes which influence the surrounding cells by attenuating the overexpression of pro-inflammatory cytokines triggered by a HFD. (AU)

• FAPESP's process: 19/26240-4 - Signaling pathways affected by fish oil in Adipose tissue-Derived Stem Cells (AdSCs) and adipocytes: correlation with metabolic, endocrine and adipogenic changes that impact its anti-Hypertrophic Obesity properties
• Grantee: Jussara de Jesus Simão
• Support Opportunities: Scholarships in Brazil - Doctorate
• FAPESP's process: 19/13618-9 - Modulation of Ezh2 expression, and other H3K27 modifiers, by NF-kB transcription factors in adipose cells
• Grantee: Maria Isabel Cardoso Alonso-Vale
• Support Opportunities: Regular Research Grants