Id |
Subject |
Object |
Predicate |
Lexical cue |
T1 |
0-194 |
Sentence |
denotes |
Decreased Whole-Body Fat Mass Produced by Chronic Alcohol Consumption is Associated with Activation of S6K1-Mediated Protein Synthesis and Increased Autophagy in Epididymal White Adipose Tissue. |
T2 |
195-206 |
Sentence |
denotes |
BACKGROUND: |
T3 |
207-359 |
Sentence |
denotes |
Chronic alcohol consumption leads to a loss of white adipose tissue (WAT) but the underlying mechanisms for this lipodystrophy are not fully elucidated. |
T4 |
360-583 |
Sentence |
denotes |
This study tested the hypothesis that the reduction in WAT mass in chronic alcohol-fed mice is associated with a decreased protein synthesis specifically related to impaired function of mammalian target of rapamycin (mTOR). |
T5 |
584-592 |
Sentence |
denotes |
METHODS: |
T6 |
593-715 |
Sentence |
denotes |
Adult male mice were provided an alcohol-containing liquid diet for 24 weeks or an isonitrogenous isocaloric control diet. |
T7 |
716-920 |
Sentence |
denotes |
In vivo protein synthesis was determined at this time and thereafter epididymal WAT (eWAT) was excised for analysis of signal transduction pathways central to controling protein synthesis and degradation. |
T8 |
921-929 |
Sentence |
denotes |
RESULTS: |
T9 |
930-1072 |
Sentence |
denotes |
While chronic alcohol feeding decreased whole-body and eWAT mass, this was associated with a discordant increase in protein synthesis in eWAT. |
T10 |
1073-1168 |
Sentence |
denotes |
This increase was not associated with a change in mTOR, 4E-BP1, Akt, or PRAS40 phosphorylation. |
T11 |
1169-1303 |
Sentence |
denotes |
Instead, a selective increase in phosphorylation of S6K1 and its downstream substrates, S6 and eIF4B was detected in alcohol-fed mice. |
T12 |
1304-1433 |
Sentence |
denotes |
Alcohol also increased eEF2K phosphorylation and decreased eEF2 phosphorylation consistent with increased translation elongation. |
T13 |
1434-1619 |
Sentence |
denotes |
Alcohol increased Atg12-5, LC3B-I and -II, and ULK1 S555 phosphorylation, suggesting increased autophagy, while markers of apoptosis (cleaved caspase-3 and -9, and PARP) were unchanged. |
T14 |
1620-1762 |
Sentence |
denotes |
Lipolytic enzymes (ATGL and HSL phosphorylation) were increased and lipogenic regulators (PPARγ and C/EBPα) were decreased in eWAT by alcohol. |
T15 |
1763-1969 |
Sentence |
denotes |
Although alcohol increased TNF-α, IL-6, and IL-1β mRNA, no change in key components of the NLRP3 inflammasome (NLRP3, ACS, and cleaved caspase-1) was detected suggesting alcohol did not increase pyroptosis. |
T16 |
1970-2015 |
Sentence |
denotes |
Plasma insulin did not differ between groups. |
T17 |
2016-2028 |
Sentence |
denotes |
CONCLUSIONS: |
T18 |
2029-2263 |
Sentence |
denotes |
These results demonstrate that the alcohol-induced decrease in whole-body fat mass resulted in part from activation of autophagy in eWAT as protein synthesis was increased and mediated by the specific increase in the activity of S6K1. |