Van Polanen 2021 Physiol Rep

From Bioblast
Publications in the MiPMap
van Polanen N, Zacharewicz E, de Ligt M, Timmers S, Moonen-Kornips E, Schaart G, Hoeks J, Schrauwen P, Hesselink MKC (2021) Resveratrol-induced remodelling of myocellular lipid stores: A study in metabolically compromised humans. Physiol Rep 9:e14692.

Β» PMID: 33476086 Open Access

van Polanen Nynke, Zacharewicz Evelyn, de Ligt Marlies, Timmers Silvie, Moonen-Kornips Esther, Schaart Gert, Hoeks Joris, Schrauwen Patrick, Hesselink Matthijs K C (2021) Physiol Rep

Abstract: In non-athletes, insulin sensitivity correlates negatively with intramyocellular lipid (IMCL) content. In athletes, however, a pattern of benign IMCL storage exists, which is characterized by lipid storage in type I muscle fibres, in small and numerous lipid droplets (LDs) preferable coated with PLIN5, without affecting insulin sensitivity. Administration of resveratrol has been promoted for its beneficial effects on glucose homeostasis. We observed that 30 days of oral resveratrol administration (150 mg/day) in metabolically compromised individuals showed a 33% increase in IMCL (placebo vs. resveratrol; 0.86 Β± 0.090 AU vs. 1.14 Β± 0.11 AU, p = 0.003) without impeding insulin sensitivity. Thus, the aim of the present study was to examine if a resveratrol-mediated increase in IMCL content, in metabolically compromised individuals, changes the LD phenotype towards the phenotype we previously observed in athletes. For this, we studied IMCL, LD number, LD size, subcellular distribution and PLIN5 coating in different fibre types using high-resolution confocal microscopy. As proof of concept, we observed a 2.3-fold increase (p = 0.038) in lipid accumulation after 48 h of resveratrol incubation in cultured human primary muscle cells. In vivo analysis showed that resveratrol-induced increase in IMCL is predominantly in type I muscle fibres (placebo vs. resveratrol; 0.97 Β± 0.16% vs. 1.26 Β± 0.09%; p = 0.030) in both the subsarcolemmal (p = 0.016) and intermyofibrillar region (p = 0.026) and particularly in PLIN5-coated LDs (p = 0.024). These data indicate that administration of resveratrol augments IMCL content in metabolically compromised individuals towards a LD phenotype that mimics an 'athlete like phenotype'. β€’ Keywords: Intramyocellular β€’ Bioblast editor: Plangger M β€’ O2k-Network Lab: NL Maastricht Schrauwen P

Labels: MiParea: Respiration, Pharmacology;toxicology 

Organism: Human  Tissue;cell: Skeletal muscle  Preparation: Permeabilized tissue 

Coupling state: OXPHOS, ET  Pathway: F, N  HRR: Oxygraph-2k 


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