深绿山龙眼中二个新的植物脑苷的结构鉴定

目的 研究深绿山龙眼Helicianilagirica的化学成分。方法 应用硅胶柱色谱法对深绿山龙眼叶子的化学成分进行分离 ,根据理化常数测定和光谱分析鉴定化合物的结构。结果 得到 2个植物脑苷化合物 :HeliciacerebrosidesA(1)和B(2 )。确定了 1的结构 ,并初步推定 2的结构。结论 化合物 1和

New ceramides from the flower of Albizia iulibrissin

A new ceramide and its glycoside were isolated from the flower of Albizia julibrissin. Their structures were established as (25,35,4R,8E)-2-[(2'R)-hydroxyhexadecanoylamino]-8-tetra-cosene-l,3,4-triol(I)and 1-O-β-D-glucopyranosy1-(2S,3S,4R,8E)-2-[(2'R)-hydroxy-hexade-canoylamino]-8-tetracosene-1,3,4-triol (II) on the basis of chemical and spectroscopic studies.

Effect of safflower yellow pigment combined with cerebellin on neurological function in patients with ischemic stroke and its mechanism

Objective: To investigate the effects of safflower yellow pigment combined with cerebellin on neurological function in patients with ischemic stroke and analyze its possible mechanism. Methods: A total of 130 patients with ischemic stroke admitted to my hospital from May 2017 to August 2018 were enrolled. The patients were divided into the control group and the study group according to the random number table method, 65 cases in each group. The control group was treated with cerebroside carnosine. And the study group was treated with safflower yellow pigment on the basis of the control group. The changes of neurological function index, oxidative stress index, vascular endothelial function index and inflammatory factor were compared before and after treatment. Results: There were no significant differences in preoperative neurological parameters, oxidative stress, vascular endothelial function and inflammatory factors between the two groups (P>0.05). After treatment, the neurological function indexes S-100β and NSE were significantly lower in both groups, and NGF levels were significantly increased. The S-100β and NSE levels in the study group were (0.91±0.10) ng/L and (12.91±1.33) ng/L, respectively, which were significantly lower than control group. While the NGF level of the study group was (79.52±8.07) μg/L significantly higher than that of the control group (both P<0.05). The levels of Ox-LDL were significantly reduced and GSH-Px levels were significantly elevated in both groups after treatment. The level of oxidative stress index Ox-LDL was (563.51±57.10) μg/dL, which was significantly lower than that of the control group, and the GSH-Px level was (154.55±16.07) U/L, which was significantly higher than the control group (both P<0.05). The levels of vascular endothelial function NT-proBNP, TXB2 and ET-1 were significantly lower in the two groups after treatment. The NT-proBNP, TXB2 and ET-1 in the study group were (95.91±9.77) pg/mL, (245.69±25.06) pg/mL and (64.26±6.65) ng/L, respectively, which were significantly lower than the control group (both P<0.05). The levels of inflammatory factors MMP-9 and TNF-α were significantly lower in the two groups after treatment. The levels of MMP-9 and TNF-α in the study group were (60.64±6.12) ng/mL and (0.33±0.04) ng/mL, respectively, which were significantly lower than those in the control group (both P<0.05). Conclusion: Safflor yellow combined with cerebellin in the treatment of ischemic stroke has higher clinical efficacy and can significantly improve the neurological function of patients. The possible mechanism is related to the improvement of vascular endothelial function and stress response.

西沙群岛来源真菌Pestalotiopsis sp.中脑苷脂类化合物及其生物活性研究

目的研究中国南海西沙群岛来源真菌Pestalotiopsis sp.ZJ-2009-7-6中的活性次级代谢产物的化学结构及其生物活性。方法利用现代波谱方法,鉴定脑苷脂类化合物cerebroside A(1)和(4E,8E)-N-D-2′-hydroxypalmitoyl-1-O-β-D-glycopyranosyl-9-methyl-4,8-sphingadienine(2)的化学结构;利用抗菌和抗病毒活性模型对其进行生物活性评价。结果化合物1对痢疾志贺氏菌(Shigellad ysenteriae)显示一定的抗菌活性(MIC=50μmol/L);化合物2对单纯疱疹病毒(HSV-1)和肠道病毒71(EV71)有较好的抗病毒活性。结论从西沙群岛来源真菌Pestalotiopsis sp.7-6中分离获得2个具有抗菌和抗病毒活性的脑苷脂类化合物。