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2015 ; 5
(ä): 69
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English Wikipedia
Deficiency of myotubularin-related protein 14 influences body weight, metabolism,
and inflammation in an age-dependent manner
#MMPMID26697164
Lv Y
; Xue L
; Cai C
; Liu QH
; Shen J
Cell Biosci
2015[]; 5
(ä): 69
PMID26697164
show ga
BACKGROUND: Myotubularin-related protein 14 (MTMR14) is a novel phosphoinositide
phosphatase with roles in the maintenance of normal muscle performance,
autophagy, and aging in mice. Our initial pilot study demonstrated that MTMR14
knock out (KO) mice gain weight earlier than their wild-type (WT) littermates,
which suggests that this gene may also be involved in metabolism regulation.
RESULTS: The present study evaluated the role of MTMR14 in the development of
aging-associated obesity. We found that aged MTMR14 KO mice fed a normal chow
diet exhibited increased serum triglyceride, total cholesterol, and glucose
levels compared to age-matched WT controls. Lipid accumulation was also increased
in aged KO mice. Several inflammatory cytokines and adipokines were dramatically
dysregulated in the metabolic tissues of aged MTMR14 KO mice compared to control
mice. Circulating inflammatory cytokines were significantly elevated and plasma
adipokine levels were abnormally regulated in aged MTMR14 KO mice. These data
suggest that MTMR14 deficiency caused a late-onset inflammation and metabolic
dysfunction. Further study demonstrated that this exacerbated metabolic
dysfunction and inflammation may be regulated by the phosphoinositide 3
kinase/protein kinase B and extracellular signal-regulated protein kinase
signaling pathways. CONCLUSIONS: Our current research suggests that MTMR14
deletion induces overweight and adult obesity accompanied by chronic inflammation
in an age-dependent manner.