A key role of nuclear factor Y in the refeeding response of fatty acid synthase in adipocytes

• Published in: FEBS letters Vol. 591; no. 7; pp. 965 - 978
• Main Authors: Nishi‐Tatsumi, Makiko, Yahagi, Naoya, Takeuchi, Yoshinori, Toya, Naoki, Takarada, Ayako, Murayama, Yuki, Aita, Yuichi, Sawada, Yoshikazu, Piao, Xiaoying, Oya, Yukari, Shikama, Akito, Masuda, Yukari, Kubota, Midori, Izumida, Yoshihiko, Matsuzaka, Takashi, Nakagawa, Yoshimi, Sekiya, Motohiro, Iizuka, Yoko, Kawakami, Yasushi, Kadowaki, Takashi, Yamada, Nobuhiro, Shimano, Hitoshi
• Format: Journal Article
• Language: English
• Published: England 01.04.2017
• Subjects: 3T3-L1 Cells; Adenoviridae - genetics; Adipocytes - cytology; Adipocytes - metabolism; adipose tissue; Adipose Tissue, White - metabolism; Animals; Base Sequence; CCAAT-Binding Factor - genetics; CCAAT-Binding Factor - metabolism; Chromatin Immunoprecipitation; Electrophoretic Mobility Shift Assay; fatty acid; Fatty Acid Synthases - genetics; Fatty Acid Synthases - metabolism; Feeding Behavior; Gene Expression Regulation; Immunoblotting; Liver - metabolism; Luciferases - genetics; Luciferases - metabolism; Male; Mice; Mice, Inbred C57BL; Mice, Inbred ICR; Mutation; Promoter Regions, Genetic - genetics; Protein Binding; Response Elements - genetics; Reverse Transcriptase Polymerase Chain Reaction; transcription; transcription; adipose tissue; fatty acid
• ISSN: 0014-5793; 1873-3468
• DOI: 10.1002/1873-3468.12620

Fatty acid synthase (Fasn) is a key component of energy metabolism that is dynamically induced by food intake. Although extensive studies have revealed a number of transcription factors involved in the fasting/refeeding transition of Fasn expression in hepatocytes, much less evidence is available for adipocytes. Using the in vivo Ad‐luc analytical system, we identified the inverted CCAAT element (ICE) around −100 nucleotides in the Fasn promoter as a critical cis‐element for the refeeding response in adipocytes. Electrophoretic mobility shift assays and chromatin immunoprecipitation show that nuclear factor Y (NF‐Y) binds to ICE specifically in refeeding states. Notably, the NF‐Y binding to ICE is differently regulated between adipocytes and hepatocytes. These findings provide insights into the specific mechanisms controlling energy metabolism in adipocytes.