Редактирование: PLIN2

Perilipin-2 (Adipophilin) (Adipose differentiation-related protein) (ADRP) [ADFP]

==Publications==

{{medline-entry
|title=Cardiac overexpression of perilipin 2 induces atrial steatosis, connexin 43 remodeling, and atrial fibrillation in aged mice.
|pubmed-url=https://pubmed.ncbi.nlm.nih.gov/31661297
|abstract=Atrial fibrillation (AF) is prevalent in patients with obesity and diabetes, and such patients often exhibit cardiac steatosis. Since the role of cardiac steatosis per se in the induction of AF has not been elucidated, the present study was designed to explore the relation between cardiac steatosis and AF. Transgenic (Tg) mice with cardiac-specific overexpression of perilipin 2 ([[PLIN2]]) were housed in the laboratory for more than 12 mo before the study. Electron microscopy of the atria of [[PLIN2]]-Tg mice showed accumulation of small lipid droplets around mitochondrial chains, and five- to ninefold greater atrial triacylglycerol (TAG) content compared with wild-type (WT) mice. Electrocardiography showed significantly longer RR intervals in [[PLIN2]]-Tg mice than in WT mice. Transesophageal electrical burst pacing resulted in significantly higher prevalence of sustained (>5 min) AF (69%) in [[PLIN2]]-Tg mice than in WT mice (24%), although it was comparable in younger (4-mo-old) mice. Connexin 43 (Cx43), a gap junction protein, was localized at the intercalated disks in WT atria but was heterogeneously distributed on the lateral side of cardiomyocytes in [[PLIN2]]-Tg atria. Langendorff-perfused hearts using the optical mapping technique showed slower and heterogeneous impulse propagation in [[PLIN2]]-Tg atria compared with WT atria. Cardiac overexpression of hormone-sensitive lipase in [[PLIN2]]-Tg mice resulted in atrial TAG depletion and amelioration of AF susceptibility. The results suggest that [[PLIN2]]-induced steatosis is associated with Cx43 remodeling, impaired conduction propagation, and higher incidence of AF in aged mice. Therapies targeting cardiac steatosis could be potentially beneficial against AF in patients with obesity or diabetes.
|mesh-terms=* Animals
* Atrial Fibrillation
* Connexin 43
* Gene Knock-In Techniques
* Heart Atria
* Isolated Heart Preparation
* Lipid Droplets
* Mice
* Mice, Transgenic
* Microscopy, Electron
* Myocytes, Cardiac
* Perilipin-2
* Sterol Esterase
* Triglycerides
* Voltage-Sensitive Dye Imaging
|keywords=* aging
* cardiac steatosis
* gap junction
* lipid droplets
* lipotoxic arrhythmia
|full-text-url=https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6957375
}}
{{medline-entry
|title=[[HDAC6]] Suppresses Age-Dependent Ectopic Fat Accumulation by Maintaining the Proteostasis of [[PLIN2]] in Drosophila.
|pubmed-url=https://pubmed.ncbi.nlm.nih.gov/28966044
|abstract=Age-dependent ectopic fat accumulation (EFA) in animals contributes to the progression of tissue aging and diseases such as obesity, diabetes, and cancer. However, the primary causes of age-dependent EFA remain largely elusive. Here, we characterize the occurrence of age-dependent EFA in Drosophila and identify [[HDAC6]], a cytosolic histone deacetylase, as a suppressor of EFA. Loss of [[HDAC6]] leads to significant age-dependent EFA, lipid composition imbalance, and reduced animal longevity on a high-fat diet. The EFA and longevity phenotypes are ameliorated by a reduction of the lipid-droplet-resident protein [[PLIN2]]. We show that [[HDAC6]] is associated physically with the chaperone protein dHsc4/Hsc70 to maintain the proteostasis of [[PLIN2]]. These findings indicate that proteostasis collapse serves as an intrinsic cue to cause age-dependent EFA. Our study suggests that manipulation of proteostasis could be an alternative approach to the treatment of age-related metabolic diseases such as obesity and diabetes.
|mesh-terms=* Aging
* Animals
* Autophagy
* Cytosol
* Diet, High-Fat
* Drosophila Proteins
* Drosophila melanogaster
* Fats
* Histone Deacetylase 6
* Histone Deacetylases
* Lipid Droplets
* Longevity
* Perilipin-2
|keywords=* Drosophila
* HDAC6
* Hsc70/dHsc4
* PLIN2
* acetylation
* aging
* autophagy
* chaperone
* fat metabolism
* proteostasis
|full-text-url=https://sci-hub.do/10.1016/j.devcel.2017.09.001
}}
{{medline-entry
|title=Effects of immobilization and aerobic training on proteins related to intramuscular substrate storage and metabolism in young and older men.
|pubmed-url=https://pubmed.ncbi.nlm.nih.gov/26626913
|abstract=Aging and inactivity lead to skeletal muscle metabolic inflexibility, but the underlying molecular mechanisms are not entirely elucidated. Therefore, we investigated how muscle lipid and glycogen stores and major regulatory proteins were affected by short-term immobilization followed by aerobic training in young and older men. 17 young (23 ± 1 years, 24 ± 1 kg m(-2), and 20 ± 2% body fat) and 15 older men (68 ± 1 years; 27 ± 1 kg m(-2), and 29 ± 2% body fat) underwent 2 weeks' one leg immobilization followed by 6 weeks' cycle training. Biopsies were obtained from m. vastus lateralis just before immobilization (at inclusion), after immobilization, and the after 6 weeks' training. The biopsies were analyzed for muscle substrates; muscle perilipin protein (PLIN), glycogen synthase (GS), synaptosomal-associated protein of 23 kDa ([[SNAP23]]) protein content, and muscle 3-hydroxyacyl-CoA dehydrogenase (HAD) activity The older men had higher intramuscular triglyceride (IMTG) (73 %) and Glycogen (16%) levels compared to the young men, and IMTG tended to increase with immobilization. [[PLIN2]] and 3 protein content increased with immobilization in the older men only. The young men had higher GS (74%) protein compared to the older men. Immobilization decreased and training restored HAD activity, GS and [[SNAP23]] protein content in young and older men. Evidence of age-related metabolic inflexibility is presented, seen as body fat and IMTG accumulation. The question arises as to whether IMTG accumulation in the older men is caused by or leading to the increase in [[PLIN2]] and 3 protein content. Training decreased body fat and IMTG levels in both young and older men; hence, training should be prioritized to reduce the detrimental effect of aging on metabolism.
|mesh-terms=* 3-Hydroxyacyl-CoA Dehydrogenase
* Aged
* Carrier Proteins
* Exercise
* Glycogen
* Glycogen Synthase
* Humans
* Immobilization
* Lipid Metabolism
* Male
* Muscle Proteins
* Muscle, Skeletal
* Perilipin-1
* Phosphoproteins
* Qb-SNARE Proteins
* Qc-SNARE Proteins
* Young Adult
|keywords=* Aerobic training
* Aging
* Immobilization
* Intramuscular triglycerides
* Muscle metabolism
* Perilipin protein
|full-text-url=https://sci-hub.do/10.1007/s00421-015-3302-x
}}