Plant Foods for Human Nutrition ( IF 4 ) Pub Date : 2021-09-04 , DOI: 10.1007/s11130-021-00920-9 Xinchuan Zheng 1 , Yongjun Yang 2 , Yongling Lu 2 , Qian Chen 2
Garcinia mangostana L. (mangosteen) is a tropical fruit that has been used for medicinal purposes in Southeast Asia for centuries. With an interest in its applications to treat infection, we sought to investigate the bioactive constituents of mangosteen and identified the phenolic compound procyanidin B2 from the mangosteen pericarp by examining lipopolysaccharide (LPS) binding capacity. The LPS binding and neutralization activities of procyanidin B2 were determined by a combination of biophysical and in silico techniques. The affinity of procyanidin B2 to LPS was 1.61 × 10–5 M. Procyanidin B2 significantly neutralized LPS and selectively inhibited the LPS-induced release of tumor necrosis factor (TNF)-α from RAW264.7 cells in a dose-dependent manner. Binding thermodynamics revealed favorable hydrogen bonding and hydrophobic interactions between procyanidin B2 and LPS. Molecular simulations suggested that hydrogen bonding and hydrophobic interactions were involved in the binding process. These findings have, for the first time, shed light on the anti-inflammatory properties of procyanidin B2 through LPS binding and neutralization and provided a promising lead for the development of antiendotoxin agents.
中文翻译:
山竹 (Garcinia mangostana L.) 果皮中原花青素 B2 的亲和分离和鉴定及其体外 LPS 结合和中和活性
Garcinia mangostana L.(山竹)是一种热带水果,几个世纪以来一直在东南亚用于药用。出于对其治疗感染的应用的兴趣,我们试图研究山竹的生物活性成分,并通过检查脂多糖 (LPS) 结合能力从山竹果皮中鉴定出酚类化合物原花青素 B2。原花青素 B2 的 LPS 结合和中和活性是通过生物物理和计算机技术的组合来确定的。原花青素 B2 对 LPS 的亲和力为 1.61 × 10 –5 M。原花青素 B2 显着中和 LPS 并选择性抑制 LPS 诱导的肿瘤坏死因子 (TNF) -α 的释放以剂量依赖性方式从 RAW264.7 细胞中提取。结合热力学揭示了原花青素 B2 和 LPS 之间有利的氢键和疏水相互作用。分子模拟表明,结合过程涉及氢键和疏水相互作用。这些发现首次揭示了原花青素 B2 通过 LPS 结合和中和的抗炎特性,并为开发抗内毒素剂提供了有希望的线索。