Pro-Inflammatory Implications of 2-Hydroxypropyl-β-cyclodextrin Treatment.

Area of Science:

• Biochemistry
• Pharmacology
• Immunology

Background:

• Disturbances in cholesterol metabolism contribute to inflammation and other pathologies.
• Two-hydroxypropyl-β-cyclodextrin (CD) is explored for its cholesterol-lowering properties.
• Concerns exist regarding CD's clinical safety and potential contraindications.

Purpose of the Study:

• To evaluate the inflammatory effects of CD in cholesterol-induced metabolic inflammation.
• To investigate CD's impact both in vivo and in vitro.
• To assess the relationship between CD's cholesterol-depleting and inflammatory actions.

Main Methods:

• Utilized low-density lipoprotein receptor knockout (Ldlr) mice with Npc1 bone marrow transplants, fed a high-fat, high-cholesterol (HFC) diet.
• Administered CD or saline via subcutaneous injection for three weeks.
• Assessed inflammatory markers and gene expression in vivo (liver) and in vitro (macrophages, BMDMs).

Main Results:

• CD improved cholesterol mobilization outside lysosomes in bone marrow-derived macrophages (BMDMs).
• CD administration led to increased hepatic inflammation in vivo and pro-inflammatory cytokine release in vitro.
• The pro-inflammatory effect of CD was time-dependent, with short-term exposure showing no adverse inflammatory response.

Conclusions:

• While CD effectively mobilizes cholesterol, it induces a pro-inflammatory response.
• The inflammatory side effects of CD are dependent on exposure duration.
• Clinical application of CD, especially for metabolic inflammatory diseases, requires careful monitoring due to potential pro-inflammatory risks.