Gachon Institute of Pharmaceutical Science & Department of Pharmacy, College of Pharmacy, Gachon University, Incheon, South Korea.
Department of Research, Sir Ganga Ram Hospital, New Delhi, India.
J Biomol Struct Dyn. 2021 Mar;39(4):1284-1294. doi: 10.1080/07391102.2020.1730971. Epub 2020 Mar 5.
Biomembranes and lipid systems are rich in unsaturated lipid components and are subject to photo-induced lipid peroxidation. The peroxidized lipid products in cellular systems are known to affect the structural organization and function of the biomembrane. We employed molecular dynamics simulations to study the effects of phospholipid peroxidation on membrane properties and the permeability of different reactive species. The results suggest that when the lipids are peroxidized, the peroxide group moves toward the membrane surface, which causes the membrane system to expand laterally and increase in area. The permeability profile revealed that nitrogen species can easily permeate through the native and peroxidized system in comparison to oxygen species, suggesting its importance in plasma-based treatment. Thus, by breaching the energy barrier with lower energy, they can traverse the cell membrane and induce oxidative stress, which leads to apoptosis.Communicated by Ramaswamy H. Sarma.
生物膜和脂质系统富含不饱和脂质成分，容易受到光诱导的脂质过氧化作用的影响。细胞系统中过氧化脂质产物已知会影响生物膜的结构组织和功能。我们采用分子动力学模拟来研究磷脂过氧化作用对膜性质和不同反应性物种通透性的影响。结果表明，当脂质过氧化时，过氧化物基团会向膜表面移动，这导致膜系统横向扩展并增加面积。通透性分析表明，与氧相比，氮更容易透过天然和过氧化系统，这表明其在基于等离子体的治疗中的重要性。因此，通过以较低的能量打破能量壁垒，它们可以穿透细胞膜并引发氧化应激，导致细胞凋亡。通讯作者：Ramaswamy H. Sarma。
