TY - JOUR
T1 - Repeated fasting events sensitize enhancers, transcription factor activity and gene expression to support augmented ketogenesis
AU - Korenfeld, Noga
AU - Charni-Natan, Meital
AU - Bruse, Justine
AU - Goldberg, Dana
AU - Marciano-Anaki, Dorin
AU - Rotaro, Dan
AU - Gorbonos, Tali
AU - Radushkevitz-Frishman, Talia
AU - Polizzi, Arnaud
AU - Nasereddin, Abed
AU - Gover, Ofer
AU - Bar-Shimon, Meirav
AU - Fougerat, Anne
AU - Guillou, Hervé
AU - Goldstein, Ido
N1 - Publisher Copyright:
© The Author(s) 2024.
PY - 2025/1/13
Y1 - 2025/1/13
N2 - Mammals withstand frequent and prolonged fasting periods due to hepatic production of glucose and ketone bodies. Because the fasting response is transcriptionally regulated, we asked whether enhancer dynamics impose a transcriptional program during recurrent fasting and whether this generates effects distinct from a single fasting bout. We found that mice undergoing alternate-day fasting (ADF) respond profoundly differently to a following fasting bout compared to mice first experiencing fasting. Hundreds of genes enabling ketogenesis are ‘sensitized’ (i.e. induced more strongly by fasting following ADF). Liver enhancers regulating these genes are also sensitized and harbor increased binding of PPARα, the main ketogenic transcription factor. ADF leads to augmented ketogenesis compared to a single fasting bout in wild-type, but not hepatocyte-specific PPARα-deficient mice. Thus, we found that past fasting events are ‘remembered’ in hepatocytes, sensitizing their enhancers to the next fasting bout and augment ketogenesis. Our findings shed light on transcriptional regulation mediating adaptation to repeated signals.
AB - Mammals withstand frequent and prolonged fasting periods due to hepatic production of glucose and ketone bodies. Because the fasting response is transcriptionally regulated, we asked whether enhancer dynamics impose a transcriptional program during recurrent fasting and whether this generates effects distinct from a single fasting bout. We found that mice undergoing alternate-day fasting (ADF) respond profoundly differently to a following fasting bout compared to mice first experiencing fasting. Hundreds of genes enabling ketogenesis are ‘sensitized’ (i.e. induced more strongly by fasting following ADF). Liver enhancers regulating these genes are also sensitized and harbor increased binding of PPARα, the main ketogenic transcription factor. ADF leads to augmented ketogenesis compared to a single fasting bout in wild-type, but not hepatocyte-specific PPARα-deficient mice. Thus, we found that past fasting events are ‘remembered’ in hepatocytes, sensitizing their enhancers to the next fasting bout and augment ketogenesis. Our findings shed light on transcriptional regulation mediating adaptation to repeated signals.
UR - http://www.scopus.com/inward/record.url?scp=85214794142&partnerID=8YFLogxK
U2 - 10.1093/nar/gkae1161
DO - 10.1093/nar/gkae1161
M3 - Article
C2 - 39673515
AN - SCOPUS:85214794142
SN - 0305-1048
VL - 53
JO - Nucleic Acids Research
JF - Nucleic Acids Research
IS - 1
M1 - gkae1161
ER -