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Misuda N, Uechi K, Yasuda S, Miyashita H, Yoshimitsu H, Tsuchihashi R, Okawa M, Kinjo J, Ono M. Identification and characterization of organic and glycosidic acids in the crude resin glycoside fraction of Ipomoea alba seeds. Carbohydr Res 2024; 540:109142. [PMID: 38718742 DOI: 10.1016/j.carres.2024.109142] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2024] [Revised: 04/16/2024] [Accepted: 05/02/2024] [Indexed: 05/27/2024]
Abstract
Resin glycosides act as laxatives in crude drugs derived from plants of the Convolvulaceae family. These compounds have exhibited antibacterial, ionophoric, anti-inflammatory, antiviral, and multidrug resistance-modulating properties, as well as cytotoxicity against cancer cells. This study investigated the organic acid, hydroxyl fatty acid, monosaccharide, and glycosidic acid components of the crude resin glycoside fraction obtained from the methanol extract of Ipomoea alba L. (Convolvulaceae) seeds, which was subjected to alkaline and acidic hydrolysis. The alkaline hydrolysis yielded acetic, isobutyric, (E)-2-methylbut-2-enoic, and 2S-methyl-3S-hydroxybutyric acids as organic acid components, along with a glycosidic acid fraction. The acidic hydrolysis of the glycosidic acid fraction resulted in the isolation of 11S-hydroxytetradecanoic and 11S-hydroxyhexadecanoic acids as hydroxyl fatty acid components, as well as d-glucose, d-quinovose, d-fucose, d-xylose, and l-rhamnose as monosaccharide components. In addition, 10 new glycosidic acid methyl esters were isolated from the glycosidic acid fraction treated with trimethylsilyldiazomethane-hexane, along with one known glycosidic acid methyl ester. Of these, eight compounds contained new glycans. Four of these compounds were unusual natural glycosides with four glycosidic linkages to one monosaccharide. Their structures were determined using MS and NMR spectral analyses, which provided valuable insights into the unique glycosidic composition of I. alba seeds.
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Affiliation(s)
- Nodoka Misuda
- School of Agriculture, Tokai University, 871-12 Sugido, Mashiki-cho, Kamimashiki-gun, Kumamoto, 861-2205, Japan
| | - Karin Uechi
- School of Agriculture, Tokai University, 871-12 Sugido, Mashiki-cho, Kamimashiki-gun, Kumamoto, 861-2205, Japan
| | - Shin Yasuda
- School of Agriculture, Tokai University, 871-12 Sugido, Mashiki-cho, Kamimashiki-gun, Kumamoto, 861-2205, Japan
| | - Hiroyuki Miyashita
- Faculty of Pharmaceutical Sciences, Sojo University, 4-22-2 Ikeda, Nishi-ku, Kumamoto, 860-0082, Japan
| | - Hitoshi Yoshimitsu
- Faculty of Pharmaceutical Sciences, Sojo University, 4-22-2 Ikeda, Nishi-ku, Kumamoto, 860-0082, Japan
| | - Ryota Tsuchihashi
- Faculty of Pharmaceutical Sciences, Fukuoka University, 8-19-1 Nanakuma, Jonan-ku, Fukuoka, 814-0180, Japan
| | - Masafumi Okawa
- Faculty of Pharmaceutical Sciences, Fukuoka University, 8-19-1 Nanakuma, Jonan-ku, Fukuoka, 814-0180, Japan
| | - Junei Kinjo
- Faculty of Pharmaceutical Sciences, Fukuoka University, 8-19-1 Nanakuma, Jonan-ku, Fukuoka, 814-0180, Japan
| | - Masateru Ono
- School of Agriculture, Tokai University, 871-12 Sugido, Mashiki-cho, Kamimashiki-gun, Kumamoto, 861-2205, Japan.
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Cruz-Morales S, Castañeda-Gómez J, Rosas-Ramírez D, Fragoso-Serrano M, Figueroa-González G, Lorence A, Pereda-Miranda R. Resin Glycosides from Ipomoea alba Seeds as Potential Chemosensitizers in Breast Carcinoma Cells. JOURNAL OF NATURAL PRODUCTS 2016; 79:3093-3104. [PMID: 28006904 DOI: 10.1021/acs.jnatprod.6b00782] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Multidrug resistance is the expression of one or more efflux pumps, such as P-glycoprotein, and is a major obstacle in cancer therapy. The use of new potent and noncytotoxic efflux pump modulators, coadministered with antineoplastic agents, is an alternative approach for increasing the success rate of therapy regimes with different drug combinations. This report describes the isolation and structure elucidation of six new resin glycosides from moon vine seeds (Ipomoea alba) as potential mammalian multidrug-resistance-modifying agents. Albinosides IV-IX (1-6), along with the known albinosides I-III (7-9), were purified from the CHCl3-soluble extract. Degradative chemical reactions in combination with NMR spectroscopy and mass spectrometry were used for their structural elucidation. Four new glycosidic acids, albinosinic acids D-G (10-13), were released by saponification of natural products 3-6. They were characterized as tetrasaccharides of either convolvulinolic (11S-hydroxytetradecanoic) or jalapinolic (11S-hydroxyhexadecanoic) acids. The potentiation of vinblastine susceptibility in multidrug-resistant human breast carcinoma cells of albinosides 1-6 was evaluated by modulation assays. The noncytotoxic albinosides VII (4) and VIII (5), at a concentration of 25 μg/mL, exerted the strongest potentiation of vinblastine susceptibility, with a reversal factor (RFMCF-7/Vin+) of 201- and >2517-fold, respectively.
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Affiliation(s)
| | - Jhon Castañeda-Gómez
- Grupo Químico de Investigación y Desarrollo Ambiental, Programa de Licenciatura en Ciencias, Facultad de Educación, Universidad Surcolombiana , Neiva, Colombia
| | | | | | - Gabriela Figueroa-González
- Laboratorio de Genómica, Unidad de Investigación Básica, Instituto Nacional de Cancerología , 14080, Mexico City, Mexico
| | - Argelia Lorence
- Arkansas Biosciences Institute and Department of Chemistry and Physics, Arkansas State University , P.O. Box 639, Jonesboro, Arkansas 72467, United States
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Cruz-Morales S, Castañeda-Gómez J, Figueroa-González G, Mendoza-García AD, Lorence A, Pereda-Miranda R. Mammalian multidrug resistance lipopentasaccharide inhibitors from Ipomoea alba seeds. JOURNAL OF NATURAL PRODUCTS 2012; 75:1603-1611. [PMID: 22924480 DOI: 10.1021/np300414d] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
As part of an ongoing project to identify inhibitors of multidrug efflux pumps, three new resin glycosides, albinosides I-III (1-3), were isolated from a CHCl(3)-soluble extract from the seeds of moon vine (Ipomoea alba). Their structures were established through NMR spectroscopy and mass spectrometry as partially acylated branched pentasaccharides derived from three new glycosidic acids, named albinosinic acids A-C (4-6). The same oligosaccharide core formed by two D-quinovose, one D-glucose, and two L-rhamnose units was linked to either convolvulinolic or jalapinolic acid for 1 and 3, respectively. They were partially esterified with (2R,3R)-3-hydroxy-2-methylbutanoic, acetic, or 2-methyl-2-butenoic acid. Compound 2 has two D-quinovose and three L-rhamnose units, linked to convolvulinolic acid, and its esterifying residues were characterized as two units of 2-methyl-2-butenoic acid. The aglycone lactonization site was located at C-2 of the terminal rhamnose unit (Rha) for 1, at C-3 of the terminal rhamnose unit (Rha') for 2, and at C-3 of the second saccharide unit (Glc) for 3. Reversal of multidrug resistance by this class of plant metabolites was also evaluated in vinblastine-resistant human breast carcinoma cells (MCF-7/Vin). The noncytotoxic compound 3 exerted the strongest potentiation effect of vinblastine susceptibility to over 2140-fold, while a moderate activity was observed for 1 (3.1-fold) and 2 (2.6-fold) at a concentration of 25 μg/mL.
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Affiliation(s)
- Sara Cruz-Morales
- Departamento de Farmacia, Facultad de Química, Universidad Nacional Autónoma de México, Ciudad Universitaria, Mexico City, 04510 DF, Mexico
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Rockey WM, Dowd MK, Reilly PJ, French AD. Modeling of deoxy- and dideoxyaldohexopyranosyl ring puckering with MM3(92). Carbohydr Res 2001; 335:261-73. [PMID: 11595220 DOI: 10.1016/s0008-6215(01)00240-3] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Extensive variations of the ring structures of three deoxyaldohexopyranoses, L-fucose, D-quinovose, and L-rhamnose, and four dideoxyaldohexopyranoses, D-digitoxose, abequose, paratose, and tyvelose, were studied by energy minimization with the molecular mechanics algorithm MM3(92). Chair conformers, 4C(1) in D-quinovose and the equivalent 1C(4) in L-fucose and L-rhamnose, overwhelmingly dominate in the three deoxyhexoses; in the D-dideoxyhexoses, 4C(1) is again dominant, but with increased amounts of 1C(4) forms in the alpha anomers of the three 3,6-dideoxyhexoses, abequose, paratose, and tyvelose and in both alpha and beta anomers of the 2,6-dideoxyhexose D-digitoxose. In general, modeled proton-proton coupling constants agreed well with experimental values. Computed anomeric ratios strongly favor the beta configuration except for D-digitoxose, which is almost equally divided between alpha and beta configurations, and L-rhamnose, where the beta configuration is somewhat favored. MM3(92) appears to overstate the prevalence of the equatorial beta anomer in all three deoxyhexoses, as earlier found with fully oxygenated aldohexopyranoses.
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Affiliation(s)
- W M Rockey
- Department of Chemical Engineering, Iowa State University, Ames, IA 50011, USA
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