化学
药代动力学
最大值
生物利用度
药理学
口服
神经保护
高效液相色谱法
分布(数学)
体内分布
色谱法
生物化学
体外
医学
数学
数学分析
作者
Yanxia Zhang,Yaming Zhang,Yanming Han,Ye Tian,Pengcheng Wu,Aiyi Xin,Xiaoning Wei,Yanbin Shi,Zhenchang Zhang,Gang Su,Yue Shi,Junxi Liu
标识
DOI:10.1016/j.jpba.2020.113140
摘要
Ligustilide (LIG) is the main active ingredient of Angelica sinensis (Oliv.) Diels and has a neuroprotective effect against ischemic stroke. However, owing to its multi-conjugated unstable structure, the compound has poor drug-forming properties. Therefore, we synthesized highly stable colorless needle crystals (known as ligusticum cycloprolactam, LIGc) through the structural modification of LIG. After a stability experiment was conducted at room temperature for four months, no impurity peaks were found by HPLC-DAD analysis, which indicated that LIGc resolved the stability issues of LIG. LIGc was absorbed and eliminated rapidly after intravenous administration (Cmax = 6.42 ± 1.65 mg/L at a dose of 20 mg/kg) and oral administration (Tmax = 0.5 h, Cmax = 9.89 ± 1.62 mg/L at a dose of 90 mg/kg, t1/2z approximately 2.5 h). The absolute oral bioavailability (F) of LIGc was clearly higher than the F of LIG reported in the literature (F, 83.97 % versus 2.6 %). Linear dose-dependent pharmacokinetics were observed after oral administration, with a higher area under the curve (AUC0-t, 22.31 ± 2.88 mg/L*h) observed at 90 mg/kg than that at 45 mg/kg (AUC0-t, 13.673 ± 0.666 mg/L*h). Tissue distribution results indicated that LIGc easily crossed the blood-brain barrier (BBB) and was distributed widely to the main tissues and organs of rats. We also conducted a preliminary safety assessment of LIGc by means of an acute toxicity test in KM mice. All mice had excellent health status (ig, dosage of 5.0 g/kg), with no histopathological changes observed in the main organs.
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