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Identification of Hypoglycemic Glycolipids from <i>Ipomoea murucoides</i> by Affinity-Directed Fractionation, In Vitro, In Silico and Dynamic Light Scattering Analysis
oleh: Daniel Rosas-Ramírez, Roberto Arreguín-Espinosa, Sonia Escandón-Rivera, Adolfo Andrade-Cetto, Gerardo Mata-Torres, Ricardo Pérez-Solís
Format: | Article |
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Diterbitkan: | MDPI AG 2024-02-01 |
Deskripsi
In the pursuit of identifying the novel resin glycoside modulators glucose-6-phosphatase and <i>α</i>-glucosidase enzymes, associated with blood sugar regulation, methanol-soluble extracts from the flowers of <i>Ipomoea murucoides</i> (cazahuate, Nahuatl), renowned for its abundance of glycolipids, were employed. The methanol-soluble extracts were fractionated by applying the affinity-directed method with glucose-6-phosphatase enzymes from a rat’s liver and <i>α</i>-glucosidase enzymes from its intestines. Mass spectrometry and nuclear magnetic resonance were employed to identify the high-affinity compound as a free ligand following the release from the enzymatic complex. Gel permeation through a spin size-exclusion column allowed the separated high-affinity molecules to bind to glucose-6-phosphatase and <i>α</i>-glucosidase enzymes in solution, which led to the identification of some previously reported resin glycosides in the flowers of cazahuate, where a glycolipid mainly structurally related to murucoidin XIV was observed. In vitro studies demonstrated the modulating properties of resin glycosides on the glucose-6-phosphatase enzyme. Dynamic light scattering revealed conformational variations induced by resin glycosides on <i>α</i>-glucosidase enzyme, causing them to become more compact, akin to observations with the positive control, acarbose. These findings suggest that resin glycosides may serve as a potential source for phytotherapeutic agents with antihyperglycemic properties.