Structure-activity relationship of serotonin derived tocopherol lipids.

Area of Science:

• Biotechnology
• Nanotechnology
• Neuroscience

Background:

• Tocopherol-based lipids are crucial for nucleic acid delivery.
• Targeting specific cell receptors, like serotonin receptors in the central nervous system, remains a challenge.

Purpose of the Study:

• To design and synthesize novel 5-hydroxytryptamine (5-HT) functionalized lipids for targeted gene delivery.
• To evaluate the efficacy of these lipids in delivering nucleic acids into cells expressing serotonin receptors.

Main Methods:

• Synthesized two distinct 5-HT conjugated tocopherol lipids (Lipid A and Lipid B) with different functional moieties (-NH2 or -OH).
• Formulated lipids with co-lipids (DOPE, DOPC) and assessed plasmid DNA delivery via reporter gene expression assays.
• Investigated physicochemical properties and cellular interactions using serotonin-receptor enriched cells and molecular docking.

Main Results:

• Lipid B, particularly when formulated with DOPE, demonstrated significantly enhanced cellular uptake and transfection efficiency compared to Lipid A.
• Molecular docking suggested the hydroxyl moiety and enantiospecificity of Lipid B are critical for serotonin receptor recognition.

Conclusions:

• Tocopherol-conjugated lipids functionalized with 5-HT offer a promising strategy for targeted gene delivery to serotonin receptors.
• Lipid B's structure facilitates efficient interaction and delivery, highlighting its potential for central nervous system applications.