Ayoub Iriny M, Korinek Michal, El-Shazly Mohamed, Wetterauer Bernhard, El-Beshbishy Hesham A, Hwang Tsong-Long, Chen Bing-Hung, Chang Fang-Rong, Wink Michael, Singab Abdel Nasser B, Youssef Fadia S
Department of Pharmacognosy, Faculty of Pharmacy, Ain Shams University, Abbassia 11566, Egypt.
Graduate Institute of Natural Products, College of Pharmacy, Kaohsiung Medical University, Kaohsiung 80708, Taiwan.
Plants (Basel). 2021 May 31;10(6):1118. doi: 10.3390/plants10061118.
This study aims to comprehensively explore the phytoconstituents as well as investigate the different biological activities of (Iridaceae) for the first time. Metabolic profiling of the leaf methanol extract of (CAL) was carried out using HPLC-PDA-ESI-MS/MS. Twenty-nine compounds were annotated belonging to various phytochemical classes including organic acids, cinnamic acid derivatives, flavonoids, isoflavonoids, and fatty acids. Myricetin-3-O-rhamnoside was the major compound identified. GLC/MS analysis of the -hexane fraction (CAL-A) resulted in the identification of 45 compounds with palmitic acid (16.08%) and methyl hexadecanoic acid ester (11.91%) representing the major constituents. CAL-A exhibited a potent anti-allergic activity as evidenced by its potent inhibition of -hexosaminidase release triggered by A23187 and IgE by 72.7% and 48.7%, respectively. Results were comparable to that of dexamethasone (10 nM) in the A23187 degranulation assay showing 80.7% inhibition for -hexosaminidase release. Both the n-hexane (CAL-A) and dichloromethane (CAL-B) fractions exhibited potent anti-inflammatory activity manifested by the significant inhibition of superoxide anion generation and prohibition of elastase release. CAL showed anti-hyperglycemic activity vivo using streptozotocin-induced diabetic rat model by reducing fasting blood glucose levels (FBG) by 53.44% as compared with STZ-treated rats along with a substantial increase in serum insulin by 22.22%. Molecular modeling studies indicated that dicaffeoylquinic acid showed the highest fitting with free binding energies (∆G) of -47.24 and -60.50 Kcal/mol for human -amylase and -glucosidase, respectively confirming its anti-hyperglycemic activity. Thus, leaf extract could serve as an effective antioxidant natural remedy combating inflammation, allergy, and hyperglycemia.
本研究旨在首次全面探索鸢尾科植物的植物成分,并研究其不同的生物活性。使用HPLC-PDA-ESI-MS/MS对鸢尾科植物(CAL)叶片的甲醇提取物进行代谢谱分析。共鉴定出29种属于不同植物化学类别的化合物,包括有机酸、肉桂酸衍生物、黄酮类、异黄酮类和脂肪酸。杨梅素-3-O-鼠李糖苷是鉴定出的主要化合物。对正己烷馏分(CAL-A)进行GLC/MS分析,鉴定出45种化合物,其中棕榈酸(16.08%)和十六烷酸甲酯(11.91%)为主要成分。CAL-A表现出强大的抗过敏活性,分别对A23187和IgE触发的β-己糖胺酶释放有72.7%和48.7%的强效抑制作用,这一结果在A23187脱颗粒试验中与地塞米松(10 nM)相当,地塞米松对β-己糖胺酶释放的抑制率为80.7%。正己烷(CAL-A)和二氯甲烷(CAL-B)馏分均表现出强大的抗炎活性,表现为对超氧阴离子生成的显著抑制和对弹性蛋白酶释放的抑制。在链脲佐菌素诱导的糖尿病大鼠模型中,CAL在体内表现出抗高血糖活性,与链脲佐菌素处理的大鼠相比,空腹血糖水平(FBG)降低了53.44%,同时血清胰岛素大幅增加了22.22%。分子模拟研究表明,二咖啡酰奎宁酸与人类α-淀粉酶和α-葡萄糖苷酶的自由结合能(∆G)分别为-47.24和-60.50 Kcal/mol,拟合度最高,证实了其抗高血糖活性。因此,CAL叶提取物可作为一种有效的抗氧化天然药物,对抗炎症、过敏和高血糖。