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Related Concept Videos

Cholesterol: Significance and Regulation01:29

Cholesterol: Significance and Regulation

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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.
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Related Experiment Video

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LDL Cholesterol Uptake Assay Using Live Cell Imaging Analysis with Cell Health Monitoring
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Myeloid cells regulate plasma LDL-cholesterol levels.

Venetia Bazioti1, Anouk M La Rose, Marit Westerterp

  • 1Section of Molecular Genetics, Department of Pediatrics, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands.

Current Opinion in Lipidology
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Elevated white blood cell counts (leukocytosis) increase cardiovascular risk. Cholesterol buildup in stem cells drives this, potentially offering new therapeutic targets for heart disease.

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LDL Cholesterol Uptake Assay Using Live Cell Imaging Analysis with Cell Health Monitoring
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Area of Science:

  • Cardiovascular Science
  • Hematology
  • Immunology

Background:

  • Leukocytosis, or elevated white blood cell levels, is linked to increased cardiovascular risk.
  • Hematopoietic stem and progenitor cells (HSPCs) generate leukocytes via hematopoiesis, primarily in bone marrow.
  • Cholesterol accumulation in HSPCs boosts hematopoiesis, increasing monocytes that infiltrate atherosclerotic plaques.

Purpose of the Study:

  • To review the relationship between HSPC proliferation, leukocytosis, LDL-cholesterol, and atherogenesis.
  • To explore how cholesterol impacts HSPC function and leukocyte production.
  • To understand the paradoxical association between low LDL-cholesterol and increased cardiovascular risk in certain conditions.

Main Methods:

  • Review of recent scientific literature on hematopoiesis, cholesterol metabolism, and cardiovascular disease.
  • Analysis of studies investigating the role of HSPCs in monocytosis and atherogenesis.
  • Examination of data linking plasma LDL-cholesterol levels to enhanced hematopoiesis.

Main Results:

  • Acute infections can increase cholesterol in HSPCs, promoting myeloid cell expansion (monocytes, neutrophils, macrophages).
  • Enhanced hematopoiesis often correlates with lower plasma LDL-cholesterol, potentially due to increased LDL uptake by myeloid cells.
  • Despite low LDL-cholesterol, individuals with heightened hematopoiesis exhibit elevated cardiovascular risk.

Conclusions:

  • Increased hematopoiesis and monocytosis may accelerate the development of atherosclerosis.
  • Understanding these pathways could reveal novel therapeutic targets for cardiovascular diseases.
  • Further research is needed to elucidate the complex interplay between cholesterol, hematopoiesis, and cardiovascular outcomes.