Pre-formulation of liposomes against Helicobacter pylori: characterization and interaction with the bacteria

Area of Science:

• Pharmaceutical Sciences
• Microbiology
• Biotechnology

Background:

• Helicobacter pylori infection is a significant global health concern.
• Developing effective drug delivery systems is crucial for combating antibiotic resistance and improving treatment outcomes.
• Liposomes offer a versatile platform for targeted antimicrobial delivery.

Purpose of the Study:

• To formulate and characterize targeted liposomes for Helicobacter pylori.
• To evaluate the encapsulation efficiency of ampicillin and metronidazole within liposomes.
• To investigate the interaction of these liposomes with different forms of Helicobacter pylori.

Main Methods:

• Liposome formulation with varying phospholipid compositions (DPPC, Epikuron 170).
• Encapsulation efficiency determination for ampicillin and metronidazole.
• X-ray diffraction for structural analysis of liposomes.
• Assessment of liposome-bacteria interactions via incorporation of fucosylated glycolipids.

Main Results:

• Metronidazole encapsulation significantly decreased in Epikuron 170 liposomes compared to DPPC liposomes.
• Metronidazole incorporation led to disorganization of phospholipid bilayers.
• Liposomes with fucosylated glycolipids demonstrated interaction with both spiral and coccoid Helicobacter pylori forms.

Conclusions:

• Liposome composition influences antimicrobial encapsulation and stability.
• Targeted liposomes incorporating fucosylated glycolipids show potential for binding to Helicobacter pylori in its various forms.
• This targeted liposome formulation presents a promising strategy for Helicobacter pylori eradication.