Nonabsorbable polysaccharide-functionalized polyethylenimine for inhibiting lipid absorption.

Area of Science:

• Biomedical Engineering
• Polymer Chemistry
• Pharmacology

Background:

• Overweight and obesity are global health concerns linked to chronic diseases.
• Effective weight management strategies are crucial for public health.

Purpose of the Study:

• To develop novel oral pharmaceutical agents for weight loss.
• To inhibit the digestion and absorption of dietary lipids in vivo.

Main Methods:

• Synthesis of β-cyclodextrin functionalized cationic branched polyethylenimine.
• Evaluation of lipid absorption inhibition by tuning polymer structure, molecular weight, and side-chain length.
• Assessment of fecal lipid and bile acid excretion, plasma and liver lipid levels in mice.
• Cytotoxicity and histological analyses for safety evaluation.

Main Results:

• The cationic polymer effectively inhibited lipid absorption.
• Significantly increased fecal elimination of bile acids (6.3-fold), triglycerides (4.8-fold), and cholesterol (5.0-fold).
• Reduced plasma and liver lipid levels in mice with no observable toxicity or histological changes.

Conclusions:

• The developed cationic polymer is an effective and safe oral pharmaceutical agent for inhibiting lipid absorption.
• This represents a promising new approach for weight control in patients with overweight and obesity.