Journal
PLANTS-BASEL
Volume 11, Issue 17, Pages -Publisher
MDPI
DOI: 10.3390/plants11172265
Keywords
Nepenthes miranda; anticancer; allantoinase; PC-9 pulmonary adenocarcinoma; B16F10 melanoma; 4T1 mammary carcinoma; antioxidation; antibacterial; dihydroorotase
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The leaf extract of Nepenthes miranda showed potential cytotoxic and enzyme inhibitory effects, indicating its pharmacological potential for medical applications.
Nepenthes are carnivorous pitcher plants that have several ethnobotanical uses, such as curing stomachache and fever. Here, we prepared different extracts from the stem, leaf, and pitcher of Nepenthes miranda to further investigate their pharmacological potential. The leaf extract of N. miranda obtained by 100% acetone (N. miranda-leaf-acetone) was used in this study to analyze the cytotoxic activities, antioxidation capacity, antibacterial activity, and allantoinase (ALLase) inhibitory effect of this plant. The cytotoxic effects of N. miranda-leaf-acetone on the survival, apoptosis, and migration of the cancer cell lines PC-9 pulmonary adenocarcinoma, B16F10 melanoma, and 4T1 mammary carcinoma cells were demonstrated. Based on collective data, the cytotoxic activities of N. miranda-leaf-acetone followed the order: B16F10 > 4T1 > PC-9 cells. In addition, the cytotoxic activities of N. miranda-leaf-acetone were synergistically enhanced when co-acting with the clinical anticancer drug 5-fluorouracil. N. miranda-leaf-acetone could also inhibit the activity of ALLase, a key enzyme in the catabolism pathway for purine degradation. Through gas chromatography-mass spectrometry, the 16 most abundant ingredients in N. miranda-leaf-acetone were identified. The top six compounds in N. miranda-leaf-acetone, namely, plumbagin, lupenone, palmitic acid, stigmast-5-en-3-ol, neophytadiene, and citraconic anhydride, were docked to ALLase, and their docking scores were compared. The docking results suggested plumbagin and stigmast-5-en-3-ol as potential inhibitors of ALLase. Overall, these results may indicate the pharmacological potential of N. miranda for further medical applications.
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