Cholesterol Depletion
Cholesterol Depletion - Related Videos
11:07
Macrophage Cholesterol Depletion and Its Effect on the Phagocytosis of Cryptococcus neoformans
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Cited by 22 •
2014
In this article, a protocol for infection of macrophages with Cryptococcus neoformans is described. Also, a method for sterol depletion from the macrophages is explained. These protocols provide a guide to study fungal infections in vitro and examine the role of sterols in such infections.
06:17
Depletion of Specific Cell Populations by Complement Depletion
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Cited by 15 •
2010
To effectively study the function of immune cell populations their purification is often required. Complement depletion is a fast and inexpensive technique for the isolation of immune cell populations with high purity.
01:29
Cholesterol: Significance and Regulation
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2024
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...
08:50
Depletion and Reconstitution of Macrophages in Mice
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Cited by 118 •
2012
Macrophages play a central role in homeostasis and pathology in many tissues. The protocol presented here describes methods for depleting macrophages in vivo, deriving polarized macrophages from bone marrow aspirates, and adoptively transferring macrophages into mice. These techniques allow determination of the role that polarized macrophages play in health and disease.
07:54
Cholesterol Efflux Assay
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Cited by 74 •
2012
The cholesterol assay is designed to quantitate the rate of cholesterol efflux from cultured cells and the capacity of plasma acceptors to accept cholesterol released from cells. The assay consists of labelling cells with cholesterol, equilibration of cholesterol among intracellular pools and release of cholesterol to an extracellular acceptor.
FAQs
Methyl-β-cyclodextrin acts as a cholesterol-capturing agent. It interacts with membrane cholesterol and extracts it from the lipid bilayer, thereby changing the membrane's composition rather than merely blocking a downstream pathway. This direct chemical manipulation lets investigators connect altered cholesterol content with subsequent changes in membrane organization, receptor activity, or vesicle trafficking.
Because cholesterol contributes to membrane organization, removing it can reorganize lipid domains that influence how receptors are positioned or function. The resulting change in receptor activity can therefore arise from a modified membrane environment rather than direct reagent-receptor binding. This distinction helps bioengineers study membrane composition as a regulator of cell signaling.
The extent of removal is critical. Controlled cholesterol depletion can expose how membrane composition affects fluidity, domain organization, signaling, adhesion, mechanics, or trafficking, whereas excessive depletion may compromise membrane integrity and cell viability. Experimental interpretation therefore requires distinguishing a specific response to altered composition from a broad loss of membrane stability.
It provides a perturbation that changes the membrane's lipid composition and physical properties, allowing researchers to observe consequences for membrane remodeling. In bioengineering studies, those consequences can be related to domain organization, vesicle trafficking, and interactions with engineered materials. The approach thus links molecular composition with larger-scale membrane behavior.
A basic workflow is to expose a membrane system to methyl-β-cyclodextrin under conditions chosen to produce controlled cholesterol removal, then examine the resulting membrane or cellular response. The key design choice is the degree of depletion: enough to perturb composition, but not so much that membrane integrity and viability are compromised.
Useful readouts include changes in membrane fluidity, lipid-domain organization, receptor activity, and vesicle trafficking. In bioengineering contexts, investigators can also examine effects on cell signaling, adhesion, mechanics, and interactions with engineered materials. Considering several outcomes together helps determine whether cholesterol primarily affects physical organization, cellular behavior, or both.
Cholesterol depletion can test how membrane composition influences engineered cell systems and material interfaces. By perturbing cells before or during studies of adhesion, mechanics, signaling, or material interaction, researchers can assess the membrane contribution to observed behavior. This supports rational design of cell-based technologies whose performance depends on membrane properties.
Results from controlled depletion studies can guide biomimetic membrane design by showing which behaviors change when cholesterol content is altered. The same reasoning applies to drug-delivery systems and other cell-based technologies: membrane composition becomes a tunable design variable rather than a fixed background feature. Excessive perturbation remains a limitation because it can reduce membrane integrity or viability.