Colonic Delivery of α-Linolenic Acid by an Advanced Nutrient Delivery System Prolongs Glucagon-Like Peptide-1 Secretion and Inhibits Food Intake in Mice
: Kamakura Remi, Raza Ghulam Shere, Mäkilä Ermei, Riikonen Joakim, Kovalainen Miia, Ueta Yoichi, Lehto Vesa-Pekka, Salonen Jarno, Herzig Karl-Heinz
Publisher: Wiley-VCH Verlag GmbH & Co. KGaA
: 2021
: Molecular Nutrition and Food Research
: Molecular Nutrition and Food Research
: 2100978
: 1613-4133
DOI: https://doi.org/10.1002/mnfr.202100978(external)
: https://research.utu.fi/converis/portal/detail/Publication/68448145(external)
Scope
Nutrients stimulate the secretion of glucagon-like peptide-1 (GLP-1), an incretin hormone, secreted from enteroendocrine L-cells which decreases food intake. Thus, GLP-1 analogs are approved for the treatment of obesity, yet cost and side effects limit their use. L-cells are mainly localized in the distal ileum and colon, which hinders the utilization of nutrients targeting GLP-1 secretion. This study proposes a controlled delivery system for nutrients, inducing a prolonged endogenous GLP-1 release which results in a decrease food intake.
Methods and Resultsα-Linolenic acid (αLA) was loaded into thermally hydrocarbonized porous silicon (THCPSi) particles. In vitro characterization and in vivo effects of αLA loaded particles on GLP-1 secretion and food intake were studied in mice. A total of 40.4 ± 3.2% of loaded αLA is released from particles into biorelevant buffer over 24 h, and αLA loaded THCPSi significantly increased in vitro GLP-1 secretion. Single-dose orally given αLA loaded mesoporous particles increased plasma active GLP-1 levels at 3 and 4 h and significantly reduced the area under the curve of 24 h food intake in mice.
ConclusionsαLA loaded THCPSi particles could be used to endogenously stimulate sustain gastrointestinal hormone release and reduce food intake.