TY - JOUR
T1 - The regulation of hepatic Pon1 by a maternal high-fat diet is gender specific and may occur through promoter histone modifications in neonatal rats
AU - Strakovsky, Rita S.
AU - Zhang, Xiyuan
AU - Zhou, Dan
AU - Pan, Yuan Xiang
N1 - Funding Information:
This project was supported by the USDA Cooperative State Research, Education and Extension Service, Hatch project number # ILLU-698-374 and ILLU-698-324W1005, and an NIEHS training grant (T32ES007326).
PY - 2014/2
Y1 - 2014/2
N2 - The antioxidant (AOX) defense system is critical for combating whole-body oxidative stress, and the present study aimed to determine the consequences of a maternal high-fat (HF) diet on neonatal hepatic lipid accumulation, oxidative stress, the expression of AOX genes, as well as epigenetic histone modifications within Pon1, an AOX enzyme. Hepatic thiobarbituric acid reactive substances were significantly increased and nonesterified fatty acids decreased in offspring of HF-fed dams, while triglycerides increased in male but not female HF offspring when compared to controls (C). Pon1, Pon2, Pon3 and Sod2 were significantly increased in offspring of HF-fed dams when compared to C. However, the increase in Pon1 and Pon3 was only significant in male but not female offspring. When compared to C, the hepatic Pon1 promoter of male and female HF offspring had significantly more acetylated histone H4 as well as dimethylated histone H3 at lysine residue 4, which are both involved in transcriptional activation. Trimethylation of histone H3 at lysine residue 9, which is involved in transcriptional repression, was only associated with genes in females. Results from the present study reveal that a maternal HF diet affects hepatic metabolism in the neonate in a gender-specific manner, and these differences, in association with epigenetic modification of histones, may contribute to the known gender differences in oxidative balance.
AB - The antioxidant (AOX) defense system is critical for combating whole-body oxidative stress, and the present study aimed to determine the consequences of a maternal high-fat (HF) diet on neonatal hepatic lipid accumulation, oxidative stress, the expression of AOX genes, as well as epigenetic histone modifications within Pon1, an AOX enzyme. Hepatic thiobarbituric acid reactive substances were significantly increased and nonesterified fatty acids decreased in offspring of HF-fed dams, while triglycerides increased in male but not female HF offspring when compared to controls (C). Pon1, Pon2, Pon3 and Sod2 were significantly increased in offspring of HF-fed dams when compared to C. However, the increase in Pon1 and Pon3 was only significant in male but not female offspring. When compared to C, the hepatic Pon1 promoter of male and female HF offspring had significantly more acetylated histone H4 as well as dimethylated histone H3 at lysine residue 4, which are both involved in transcriptional activation. Trimethylation of histone H3 at lysine residue 9, which is involved in transcriptional repression, was only associated with genes in females. Results from the present study reveal that a maternal HF diet affects hepatic metabolism in the neonate in a gender-specific manner, and these differences, in association with epigenetic modification of histones, may contribute to the known gender differences in oxidative balance.
KW - Developmental programming
KW - Epigenetics
KW - In uterine
KW - Oxidative stress
UR - http://www.scopus.com/inward/record.url?scp=84892547180&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84892547180&partnerID=8YFLogxK
U2 - 10.1016/j.jnutbio.2013.09.016
DO - 10.1016/j.jnutbio.2013.09.016
M3 - Article
C2 - 24445041
AN - SCOPUS:84892547180
SN - 0955-2863
VL - 25
SP - 170
EP - 176
JO - Journal of Nutritional Biochemistry
JF - Journal of Nutritional Biochemistry
IS - 2
ER -