Abstract
Artabotrys hexapetalus (L.f.) Bhandari, Annonaceae, is one of Artabotrys species found in Asia, such as Sri Lanka, India, China, Malaysia, Indonesia, and other Southeast Asian countries. This plant is traditionally used as an herbal medicine. This research explored the potential of A. hexapetalus leaf and stem bark ethanol extract to treat type 2 diabetes by inhibiting the activity of α-glucosidase, including its relationship with the antioxidant activity, phenolic content, and flavonoid content. The analysis used α-glucosidase inhibition assay, 2,2-diphenyl-1-picrylhydrazyl free radical inhibition assay, ferric reducing antioxidant power assay, total phenolic content, total flavonoid content, liquid chromatography-tandem mass chromatography, and molecular docking analysis. Results showed that stem bark extract had a moderate α-glucosidase inhibitory activity with an IC50 value of 47.084 ppm. In contrast, the leaf extract had a weak α-glucosidase inhibitory activity with an IC50 value of 104.755 ppm. Random permutation in random forest simulation was used to predict the factors contributing to the α-glucosidase inhibition. For stem bark and leaf extracts, the α-glucosidase inhibition activity was predicted to be influenced by antioxidant activity and phenolic compounds. Comparisons between various analyses were shown to corroborate the random permutation results. Nevertheless, since the major identified active compound that likely played a role in α-glucosidase inhibition in stem bark was from terpene groups, it was predicted that some major compounds with high α-glucosidase inhibitory and antioxidant activities in stem bark were yet-to-be-identified.
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Acknowledgements
The authors would like to thank Bogor Botanical Garden for providing the samples for this research, as well as the Advanced Characterization Laboratories Serpong at National Research and Innovation Institutes and the Pharmaceutical Biology Laboratory and Food Quality Control Laboratory at Pelita Harapan University for providing facilities and technical support for this research.
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This research was financially supported by PUTI Q2 2023 University of Indonesia No. NKB-589/ UN2.RST/HKP.05.00/2023, Pelita Harapan University through internal grant number P-29-FIKes/VIII/2022, and the National Research and Innovation Agency through Degree by Research Scholarship study funding.
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DR performed the experiments and drafted the manuscript; BE designed the experiments and reviewed the article; MH collected the samples and performed LC-MS/MS analyses; YH, MIS, and AK reviewed and did a critical reading of the manuscript. All the authors have read and agreed with the final version of the manuscript.
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Rosa, D., Elya, B., Hanafi, M. et al. Analysis of Artabotrys hexapetalus Stem Bark and Leaf Ethanol Extracts as α-Glucosidase Inhibitors: In Vitro Analysis, LC-MS/MS, Machine Learning, and Molecular Docking. Rev. Bras. Farmacogn. 34, 386–396 (2024). https://doi.org/10.1007/s43450-023-00494-4
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DOI: https://doi.org/10.1007/s43450-023-00494-4