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Cholesterol: Significance and Regulation01:29

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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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β-adrenoceptors have varied sensitivities towards adrenaline, noradrenaline, and isoprenaline. The order of agonist potency is as follows:
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Antianginal Drugs: Nitrates and β-Blockers01:16

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In cardiovascular health, antianginal drugs combat angina pectoris — a condition marked by chest pain owing to diminished blood flow to the heart.
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β receptors are classified into three subclasses: β1, β2, and β3. β1 receptors are primarily located in the heart and kidneys. When they get activated, they increase heart rate, contractility, and renin release. This process enhances blood pressure and aids in stress management. In contrast, β2 receptors are situated mainly in the lungs, blood vessels, and skeletal muscles. Upon activation, they trigger smooth muscle relaxation, causing bronchodilation and...
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β-adrenergic antagonists, commonly known as β-blockers, block the effects of sympathetic neurotransmitters such as noradrenaline (NA) and adrenaline (ADR). They have several beneficial effects in heart failure treatment. They reduce heart rate, the force of contraction, and cardiac muscle relaxation. They also slow the atrial-ventricular conduction rate and raise the threshold for arrhythmias. The concentration of β-blockers determines their effects on bronchodilation,...
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Updated: Feb 12, 2026

Transport Properties of Ibuprofen Encapsulated in Cyclodextrin Nanosponge Hydrogels: A Proton HR-MAS NMR Spectroscopy Study
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Biofunctionalization of β-cyclodextrin nanosponges using cholesterol.

Parbeen Singh1, Xiaohong Ren2, Tao Guo2

  • 1Center for Drug Delivery System, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China; University of Chinese Academy of Sciences, Beijing 100049, China.

Carbohydrate Polymers
|April 10, 2018
PubMed
Summary
This summary is machine-generated.

Cholesterol modification enhances cyclodextrin nanosponges (CD-NSPs) cellular uptake for improved drug delivery. This cholesterol-grafted beta-cyclodextrin nanosponge (β-CD-NSP) system shows potential as a site-specific therapeutic carrier.

Keywords:
BiofunctionalizationCellular uptakeCholesterolβ-CD nanosponge

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Area of Science:

  • Biomaterials Science
  • Nanotechnology
  • Drug Delivery Systems

Background:

  • Cyclodextrins nanosponges (CD-NSPs) are porous polymers for therapeutic agent delivery.
  • Their limited cellular binding restricts drug delivery applications.
  • Cholesterol is an endogenous molecule crucial for cell interactions.

Purpose of the Study:

  • To functionalize β-cyclodextrin nanosponges (β-CD-NSP) with cholesterol.
  • To enhance the cellular binding and uptake of CD-NSPs for drug delivery.
  • To evaluate the drug adsorption and cellular uptake of the modified nanosponges.

Main Methods:

  • Surface functionalization of β-CD-NSP with cholesterol.
  • Characterization using spectroscopic, microscopic, and thermogravimetric techniques.
  • Cytotoxicity assay and doxorubicin adsorption studies.
  • Confocal laser scanning microscopy (CLSM) for cellular uptake analysis.

Main Results:

  • Successful grafting of cholesterol onto β-CD-NSP confirmed.
  • Synthesized β-CD-NSP demonstrated safety in cytotoxicity assays.
  • Enhanced cellular uptake of cholesterol-modified β-CD-NSP was observed.
  • Doxorubicin adsorption onto the modified nanosponges was evaluated.

Conclusions:

  • Cholesterol modification significantly improves β-CD-NSP cellular uptake.
  • The cholesterol-grafted β-CD-NSP system is a promising candidate for site-specific drug delivery.
  • This approach overcomes the limitations of native CD-NSPs in cellular interactions.