Hepatic lipid droplet breakdown through lipolysis during hibernation in Chinese Soft-Shelled Turtle ().

08:00 EDT 29th March 2019 | BioPortfolio

Summary of "Hepatic lipid droplet breakdown through lipolysis during hibernation in Chinese Soft-Shelled Turtle ()."

Hibernation is an adaptive survival strategy in response to cold and foodless winter. To determine the underlying mechanisms of seasonal adaptions, transcriptome sequencing studies have been conducted in bears, ground squirrels and bats. Despite advances in identifying differentially expressed genes involved in metabolism, the precise mechanisms of these physiological adaptions remain unclear. In the present study, we examined liver of Chinese Soft-Shelled Turtle () and found that the contents of lipid droplet (LD) and triglyceride (TG) were significantly decreased during hibernation. Increases in mRNA expression levels of lipolysis-related genes and decreased levels of lipogenesis-related genes during hibernation indicated that LD hydrolysis was stimulated during hibernation. To continuously release fatty acids (FAs) from LD, adipose triglyceride lipase (ATGL) was recruited and accumulated on the surface of LDs via activation of Cyclic Adenosine monophosphate (cAMP)/protein kinase A (PKA) signaling. Meanwhile, increased phosphorylation of the LD-associated protein, perilipin-5, activated the enzyme activity of ATGL via interaction between comparative gene identification-58 (CGI-58) and ATGL. Taken together, our results indicated that ATGL accumulation on the LD surface and its induced enzyme activity during hibernation promoted LD breakdown in the liver of Chinese Soft-Shelled Turtle (), thereby enhancing mitochondrial β-oxidation to maintain energy hemostasis.


Journal Details

This article was published in the following journal.

Name: Aging
ISSN: 1945-4589


DeepDyve research library

PubMed Articles [4923 Associated PubMed Articles listed on BioPortfolio]

Attenuation of Palm Stearin Emulsion Droplet in Vitro Lipolysis with Crystallinity and Gastric Aggregation.

Emulsions with partially crystalline solid (SE) and undercooled-liquid (LE) droplets with equivalent droplet sizes (centering ∼416 nm), surface charges (∼-56 mV), and spherical morphologies were p...

54rElevated lipolysis in adipose tissue by doxorubicin via PPARα activation associated with hepatic steatosis and insulin resistance.

Adipose dysfunction is tightly associated with hepatic insulin resistance and steatosis condition. Doxorubicin would disturb the lipid metabolism both in adipose and liver. Here we projected that doxo...

TFAP2 transcription factors are regulators of lipid droplet biogenesis.

How trafficking pathways and organelle abundance adapt in response to metabolic and physiological changes is still mysterious, although a few transcriptional regulators of organellar biogenesis have b...

Cavin-1 is linked to lipid droplet formation in human hepatic stellate cells.

Quantitative prediction of oral bioavailability of a lipophilic antineoplastic drug bexarotene administered in lipidic formulation using a combined in vitro lipolysis/microsomal metabolism approach.

For performance assessment of the lipid-based drug delivery systems (LBDDS), in vitro lipolysis is commonly applied because traditional dissolution tests do not reflect the complicated in vivo micella...

Clinical Trials [2418 Associated Clinical Trials listed on BioPortfolio]

Digestion of Biopolymer Based Lipid Emulsions

In this randomized, double blind, unbalanced three way crossover trial, four lipid emulsions will be assessed on three study days. The lipid emulsions (LEs) have been engineered so that th...

Long-term, Substantial Weight Loss and Insulin Regulation of Lipolysis

It is not known how much improvement in insulin regulated lipolysis (the breakdown of triglycerides) occurs following substantial, sustained weight loss. Researchers will test the effects ...

Effects of Emulsification and Lipid Droplet Size on Postprandial Metabolic Responses

The aim of this study is to compare the effects of emulsification and lipid droplet size on gastric emptying rate, and to determine if the change in gastric emptying rate can in turn influ...

Potential Association of a Common L-FABP Polymorphism With Lipid-Induced Hepatic Insulin Resistance

The investigators hypothesise that a common A277G polymorphism of the liver fatty acid binding protein (L-FABP) gene, which leads to an amino acid exchange, may be associated with alterati...

Effects of FXR Activation on Hepatic Lipid and Glucose Metabolism

The purpose of this study is to determine whether chenodeoxycholic acid decreases de novo hepatic lipogenesis, hepatic fat content, hepatic triglyceride production and plasma triglyceride ...

Medical and Biotech [MESH] Definitions

A family of vertebrate and insect lipid droplet associated proteins. They consist of a conserved N-terminal PAT domain (an alpha-helical region of about 110 amino acids), an 11-mer repeat region, and lipid-binding hydrophobic regions or 4-helix bundles near their C-termini. Perilipins transiently or constitutively localize to LIPID DROPLETS in ADIPOCYTES and FOAM CELLS, especially in regions adjacent to the PLASMA MEMBRANE and ENDOPLASMIC RECTICULUM. They are critical for lipid droplet synthesis and homeostasis as well as the regulation of lipid metabolism. Genetic variations in perilipins are associated with ATHEROSCLEROSIS; OBESITY; and DIABETES MELLITUS.

Lipid infiltration of the hepatic parenchymal cells resulting in a yellow-colored liver. The abnormal lipid accumulation is usually in the form of TRIGLYCERIDES, either as a single large droplet or multiple small droplets. Fatty liver is caused by an imbalance in the metabolism of FATTY ACIDS.

Conditions characterized by abnormal lipid deposition due to disturbance in lipid metabolism, such as hereditary diseases involving lysosomal enzymes required for lipid breakdown. They are classified either by the enzyme defect or by the type of lipid involved.

Proteins, such as PERILIPINS, that localize to LIPID DROPLETS either transiently or constitutively.

The metabolic process of breaking down LIPIDS to release FREE FATTY ACIDS, the major oxidative fuel for the body. Lipolysis may involve dietary lipids in the DIGESTIVE TRACT, circulating lipids in the BLOOD, and stored lipids in the ADIPOSE TISSUE or the LIVER. A number of enzymes are involved in such lipid hydrolysis, such as LIPASE and LIPOPROTEIN LIPASE from various tissues.

Quick Search


DeepDyve research library

Relevant Topics

Hepatology is the study of liver, gallbladder, biliary tree, and pancreas, and diseases associated with them. This includes viral hepatitis, alcohol damage, cirrhosis and cancer. As modern lifestyles change, with alcoholism and cancer becoming more promi...

DNA sequencing
DNA sequencing is the process of determining the precise order of nucleotides within a DNA molecule. During DNA sequencing, the bases of a small fragment of DNA are sequentially identified from signals emitted as each fragment is re-synthesized from a ...

Within medicine, nutrition (the study of food and the effect of its components on the body) has many different roles. Appropriate nutrition can help prevent certain diseases, or treat others. In critically ill patients, artificial feeding by tubes need t...

Searches Linking to this Article