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Ultrasonic radiation induced lipid peroxidation in liposomal membrane
Abstract:
Ultrasonic radiation produced a dose dependent linear increase in lipid peroxidation (MDA formation) in the liposomal membrane. The yield of MDA was significantly inhibited by butylated hydroxytoluene (BHT), the antioxidant, sodium formate, the OH. radical scavenger, and EDTA, the metal ion chelator. Ascorbic acid at low concentration increased the ultrasonic induced MDA formation while high concentrations inhibited lipid peroxidation. A mechanism of ultrasound induced lipid peroxidation is suggested.
Insights
Ultrasonic radiation causes lipid peroxidation in liposomes, measured by malondialdehyde (MDA) formation. Antioxidants and radical scavengers inhibited this effect, suggesting a mechanism involving free radicals.
Area of Science:
- Biochemistry
- Physical Chemistry
- Membrane Science
Background:
- Lipid peroxidation is a key indicator of oxidative stress.
- Liposomes are widely used model systems for studying membrane dynamics and stability.
- Understanding the effects of physical agents like ultrasound on lipid membranes is crucial for various applications.
Purpose of the Study:
- To investigate the impact of ultrasonic radiation on lipid peroxidation in liposomal membranes.
- To identify the reactive species involved in ultrasound-induced lipid peroxidation.
- To explore the protective effects of antioxidants and radical scavengers.
Main Methods:
- Liposomes were exposed to varying doses of ultrasonic radiation.
- Lipid peroxidation was quantified by measuring malondialdehyde (MDA) formation.
- The effects of butylated hydroxytoluene (BHT), sodium formate, EDTA, and ascorbic acid were assessed.
Main Results:
- Ultrasonic radiation induced a dose-dependent, linear increase in MDA formation.
- BHT, sodium formate, and EDTA significantly inhibited MDA formation.
- Ascorbic acid showed a dual effect: low concentrations enhanced MDA formation, while high concentrations inhibited it.
Conclusions:
- Ultrasound-induced lipid peroxidation in liposomes is mediated by free radicals, likely hydroxyl radicals.
- Antioxidants, radical scavengers, and metal ion chelators can mitigate ultrasound-induced membrane damage.
- The concentration-dependent effect of ascorbic acid suggests complex interactions with the radical species generated by ultrasound.