Comparing the effects of nano-sized sugarcane fiber with cellulose and psyllium on hepatic cellular signaling in mice.
OBJECTIVE
To compare the effects of dietary fibers on hepatic cellular signaling in mice.


METHODS
Mice were randomly divided into four groups (n = 9/group): high-fat diet (HFD) control, cellulose, psyllium, and sugarcane fiber (SCF) groups. All mice were fed a HFD with or without 10% dietary fiber (w/w) for 12 weeks. Body weight, food intake, fasting glucose, and fasting insulin levels were measured. At the end of the study, hepatic fibroblast growth factor (FGF) 21, AMP-activated protein kinase (AMPK) and insulin signaling protein content were determined.


RESULTS
Hepatic FGF21 content was significantly lowered, but βKlotho, fibroblast growth factor receptor 1, fibroblast growth factor receptor 3, and peroxisome proliferator-activated receptor alpha proteins were significantly increased in the SCF group compared with those in the HFD group (P < 0.01). SCF supplementation also significantly enhanced insulin and AMPK signaling, as well as decreased hepatic triglyceride and cholesterol in comparison with the HFD mice. The study has shown that dietary fiber, especially SCF, significantly attenuates lipid accumulation in the liver by enhancing hepatic FGF21, insulin, and AMPK signaling in mice fed a HFD.


CONCLUSIONS
This study suggests that the modulation of gastrointestinal factors by dietary fibers may play a key role in both enhancing hepatic multiple cellular signaling and reducing lipid accumulation.
Nutrition and Diabetes Research Laboratory, Pennington Biomedical Research Center, Louisiana State University System, Baton Rouge, LA 70808, USA. wangzq@pbrc.edu
Zhong Q
ZQ
Wang
Yongmei
Y
Yu
Xian H
XH
Zhang
Z Elizabeth
ZE
Floyd
Anik
A
Boudreau
Kun
K
Lian
William T
WT
Cefalu
D055372:AMP-Activated Protein Kinases / Q000378:metabolism; D000818:Animals; D001835:Body Weight / Q000187:drug effects; D002482:Cellulose / Q000737:chemistry / Q000494:pharmacology*; D004043:Dietary Fiber / Q000494:pharmacology*; D005346:Fibroblast Growth Factors / Q000235:genetics / Q000378:metabolism; D005947:Glucose / Q000378:metabolism; D007328:Insulin / Q000378:metabolism; D050356:Lipid Metabolism; D008099:Liver / Q000187:drug effects* / Q000378:metabolism*; D008297:Male; D051379:Mice; D008810:Mice, Inbred C57BL; D053758:Nanoparticles / Q000008:administration & dosage* / Q000737:chemistry; D019869:Phosphatidylinositol 3-Kinases / Q000378:metabolism; D011620:Psyllium / Q000737:chemistry / Q000494:pharmacology*; D011897:Random Allocation; D031786:Saccharum / Q000737:chemistry*; D015398:Signal Transduction / Q000187:drug effects
D004043:Dietary Fiber; D007328:Insulin; C414620:fibroblast growth factor 21; D005346:Fibroblast Growth Factors; D011620:Psyllium; D002482:Cellulose; C027433:bagasse; D019869:Phosphatidylinositol 3-Kinases; D055372:AMP-Activated Protein Kinases; D005947:Glucose