Related Experiment Video

Updated: May 26, 2026

LDL Cholesterol Uptake Assay Using Live Cell Imaging Analysis with Cell Health Monitoring
08:45

LDL Cholesterol Uptake Assay Using Live Cell Imaging Analysis with Cell Health Monitoring

Published on: November 17, 2018

Effect of simvastatin on the expression and regulation mechanism of apolipoprotein M

Liu Yang1, Shuiping Zhao

  • 1Department of Cadres Medical, Xiangya Hospital, Central South University, Changsha 410011, P.R. China.

International Journal of Molecular Medicine
|December 14, 2011
PubMed

Insights

Simvastatin significantly increases apolipoprotein M (ApoM) expression in liver cells and in vivo. This effect is mediated by regulating hepatocyte nuclear factor-1α (HNF-1α) and liver X receptor-α (LXRα).

Area of Science:

  • Biochemistry
  • Molecular Biology
  • Pharmacology

Background:

  • Apolipoprotein M (ApoM) is a plasma protein primarily found in high-density lipoprotein (HDL).
  • Statins are known to influence various HDL-associated apolipoproteins.
  • The effect of statins on ApoM expression remains largely uncharacterized.

Purpose of the Study:

  • To investigate the impact of simvastatin on ApoM expression.
  • To elucidate the molecular mechanisms underlying simvastatin's effect on ApoM.

Main Methods:

  • In vivo studies using mice to assess hepatic ApoM mRNA and protein levels.
  • In vitro experiments with HepG2 cells to evaluate simvastatin's dose-dependent effects on ApoM.
  • Analysis of regulatory factors including hepatocyte nuclear factor-1α (HNF-1α) and liver X receptor-α (LXRα) expression.
  • Pharmacological inhibition/activation of HNF-1α and LXRα pathways.

Main Results:

  • Simvastatin significantly up-regulated ApoM mRNA and protein expression in mouse liver and HepG2 cells.
  • Simvastatin treatment led to increased hepatic HNF-1α mRNA and decreased LXRα mRNA in mice.
  • Inhibition of HNF-1α or activation of LXRα counteracted the simvastatin-induced ApoM up-regulation in HepG2 cells.

Conclusions:

  • Simvastatin demonstrably up-regulates ApoM expression both in vivo and in vitro.
  • The mechanism involves the modulation of HNF-1α and LXRα signaling pathways.
  • ApoM emerges as a novel apolipoprotein whose expression is influenced by simvastatin.

More Related Videos

Cholesterol Efflux Assay07:54

Cholesterol Efflux Assay

Published on: March 6, 2012

Related Concept Videos

Lipid-Lowering Drugs: Statins and Miscellaneous Agents01:20

Lipid-Lowering Drugs: Statins and Miscellaneous Agents

Hyperlipidemia, a medical condition often referred to as high cholesterol, is characterized by abnormally elevated levels of lipids in the bloodstream. When present in excess, these lipids, specifically cholesterol and triglycerides, can lead to serious health complications, often involving cardiovascular diseases. Illnesses like atherosclerosis, heart attacks, and pancreatitis have all been linked to untreated hyperlipidemia. This means controlling and regulating cholesterol and triglyceride...
Cholesterol: Significance and Regulation01:29

Cholesterol: Significance and Regulation

Although not a source of energy, cholesterol plays a significant role as a foundational structure for bile salts, steroid hormones, and vitamin D, as well as being a crucial component of plasma membranes. Approximately 15% of blood cholesterol is derived from our diet, with the remainder synthesized from acetyl CoA by the liver and intestines. Cholesterol is eliminated from the body through its conversion into bile salts, which are eventually discarded in the feces.
Considering cholesterol and...
Pharmacogenomics: Identification of New Drug Targets01:29

Pharmacogenomics: Identification of New Drug Targets

Advances in genomics have profoundly influenced drug discovery by increasing both the speed and accuracy of pharmaceutical development. Pharmacogenomics, which examines how genetic variation influences drug response, facilitates the identification of novel therapeutic targets and enables patient stratification for personalized treatment. These strategies contribute to improved drug efficacy, minimized adverse effects, and more efficient clinical trial design.Mapping genetic differences...
Regulation of Expression at Multiple Steps01:23

Regulation of Expression at Multiple Steps

The gene expression in cells is regulated at different stages: (i) transcription, (ii) RNA processing, (iii) RNA localization, and (iv) translation. Transcriptional regulation is mediated by regulatory proteins such as transcription factors, activators, or repressors—these control gene expression by initiating or inhibiting the transcription of genes. Once a precursor or pre-mRNA is produced, it undergoes post-transcriptional modification, including 5' capping, splicing, and the addition of a...
Regulation of Nuclear Protein Sorting01:45

Regulation 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...
Atherosclerosis III: Management01:26

Atherosclerosis III: Management

Management of atherosclerosis involves an integrated strategy encompassing pharmacological treatment, surgical interventions, lifestyle changes, and nutrition therapy to address the multifactorial nature of the disease.Pharmacological TherapyA cornerstone of atherosclerosis management is the use of pharmacological agents. Statins, such as atorvastatin, are pivotal in inhibiting HMG-CoA reductase, an enzyme that catalyzes an initial step in cholesterol synthesis in the liver. This reduction in...