Related Experiment Video
Updated: May 25, 2026
09:53
In Vivo Nanovector Delivery of a Heart-specific MicroRNA-sponge
Published on: June 15, 2018
MicroRNAs regulating lipid metabolism in atherogenesis.
K J Rayner1, C Fernandez-Hernando, K J Moore
1Department of Medicine and Cell Biology, New York University School of Medicine, New York, New York, USA.
Thrombosis and Haemostasis
|January 26, 2012
Summary
MicroRNAs regulate lipid metabolism by controlling cholesterol and fatty acid homeostasis. Inhibiting microRNA-33a/b in animal models improved lipoprotein profiles, suggesting therapeutic potential for metabolic diseases.
Area of Science:
- Molecular Biology
- Metabolic Regulation
- Biochemistry
Background:
- MicroRNAs (miRNAs) are key post-transcriptional regulators of gene expression.
- Dysregulation of lipid metabolism is implicated in numerous diseases.
- miRNAs offer novel therapeutic targets for metabolic disorders.
Purpose of the Study:
- To investigate the role of microRNA-33a/b in lipid metabolism.
- To explore the therapeutic potential of miRNA inhibition for dyslipidaemia.
Main Methods:
- Analysis of miRNA gene expression and function.
- Inhibition of specific miRNAs in animal models.
- Assessment of lipid profiles and lipoprotein metabolism.
Main Results:
- MicroRNA-33a/b are embedded within SREBP genes, regulating cholesterol and fatty acid homeostasis.
- Inhibition of miR-33a/b increased high-density lipoprotein (HDL) and decreased very low-density lipoprotein (VLDL) triglycerides in animal models.
- Other miRNAs, like miR-758, also target pathways involved in lipid metabolism.
Conclusions:
- MicroRNA-33a/b are critical regulators of lipid metabolism.
- Inhibition of miR-33a/b demonstrates therapeutic potential for dyslipidaemia and related metabolic diseases.
- miRNA-based therapies represent a promising strategy for treating atherosclerosis.
Related Concept Videos
01:22MicroRNAs
MicroRNA (miRNA) are short, regulatory RNA transcribed from introns—non-coding regions of a gene—or intergenic regions—stretches of DNA present between genes. Several processing steps are required to form biologically active, mature miRNA. The initial transcript, called primary miRNA (pri-mRNA), base-pairs with itself forming a stem-loop structure. Within the nucleus, an endonuclease enzyme, called Drosha, shortens the stem-loop structure into hairpin-shaped pre-miRNA. After the pre-miRNA ends...
01:22MicroRNAs
MicroRNA (miRNA) are short, regulatory RNA transcribed from introns (non-coding regions of a gene) or intergenic regions (stretches of DNA present between genes). Several processing steps are required to form biologically active, mature miRNA. The initial transcript, called primary miRNA (pri-mRNA), base-pairs with itself, forming a stem-loop structure. Within the nucleus, an endonuclease enzyme, called Drosha, shortens the stem-loop structure into hairpin-shaped pre-miRNA. After the pre-miRNA...
01:22MicroRNAs
MicroRNA (miRNA) are short, regulatory RNA transcribed from introns—non-coding regions of a gene—or intergenic regions—stretches of DNA present between genes. Several processing steps are required to form biologically active, mature miRNA. The initial transcript, called primary miRNA (pri-mRNA), base-pairs with itself forming a stem-loop structure. Within the nucleus, an endonuclease enzyme, called Drosha, shortens the stem-loop structure into hairpin-shaped pre-miRNA. After the pre-miRNA ends...
01:45Regulation of Nuclear Protein Sorting
Nuclear protein sorting regulates nucleus composition and gene expression, crucial for determining the fate of a eukaryotic cell. Hence, the entry and exit of molecules across the nuclear envelope is a tightly controlled process. Nuclear protein sorting can be inhibited by one of the following ways: 1) masking cargo signal sequences, 2) modifying the nuclear receptor's affinity for cargo, 3) controlling the nuclear pore size, 4) retaining the cargo during its transit to the cytosol or the...
01:25Lipid Catabolism
Triglycerides serve as crucial long-term energy storage molecules in microorganisms, providing a dense source of metabolic energy. Their breakdown is mediated by lipases, which hydrolyze triglycerides into glycerol and free fatty acids. Each of these components follows distinct metabolic pathways, ultimately contributing to ATP synthesis and cellular energy homeostasis.Glycerol MetabolismGlycerol, released from triglyceride hydrolysis, is phosphorylated by glycerol kinase to form...
01:06Lipid Digestion
Lipids are large molecules that are generally not water-soluble. Since most of the digestive enzymes in the human body are water-based, there are specific steps the body must take to break down lipids and make them available for use.