Bioassay-guided isolation of antioxidants and ?-Glucosidase inhibitors from the root of cassia sieberiana D.C. (fabaceae)
Bioassay-guided isolation was used to investigate the antioxidants and α-glucosidase inhibitors from extract of root of Cassia sieberiana. The ethyl acetate fraction demonstrated strong free radical scavenging (DPPH and ABTS+) and potent α-glucosidase inhibition. The subsequent fractionation and pur...
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| Format: | Article |
| Language: | English |
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ACG Publications
2017
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| Online Access: | http://eprints.utm.my/75725/1/HasnahMohdSirat_Bioassay-GuidedIsolationofAntioxidantsanda-Glucosidase.pdf |
| _version_ | 1796862392987025408 |
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| author | Jibril, S. Sirat, H. M. Basar, N. |
| author_facet | Jibril, S. Sirat, H. M. Basar, N. |
| author_sort | Jibril, S. |
| collection | ePrints |
| description | Bioassay-guided isolation was used to investigate the antioxidants and α-glucosidase inhibitors from extract of root of Cassia sieberiana. The ethyl acetate fraction demonstrated strong free radical scavenging (DPPH and ABTS+) and potent α-glucosidase inhibition. The subsequent fractionation and purification of the ethyl acetate fraction using silica gel chromatography and Sephadex LH-20, yielded; islandicin (1), chrysophanol (2), physcion (3), emodin (4), quercetin (5), kaempferol (6), dihydrokaempferol (7), and piceatannol (8). Quercetin (5) showed the most active antioxidant activity with IC50 values of 1.58 mM and 1.30 mM against DPPH and ABTS+ radicals, followed by piceatannol (8) with IC50 values of 3.96 mM and 3.28 mM, which is better than the standard BHT (with IC50 value 8.93 mM) and trolox (with IC50 value 8.25 mM), for DPPH and ABTS+ radicals scavenging activities, respectively. For the α-glucosidase inhibitory assay, quercetin (5) and piceatannol (8) showed higher potency against α-glucosidase with IC50 values of 5.73 μM and 7.37 μM respectively, than standard quercetin with IC50 value of 9.20 μM and acarbose with IC50 value of 14.12 μM. This study presents the first report on the α-glucosidase inhibitors from root of C. sieberiana and all the compounds are isolated from this source for the first time. |
| first_indexed | 2024-03-05T20:10:58Z |
| format | Article |
| id | utm.eprints-75725 |
| institution | Universiti Teknologi Malaysia - ePrints |
| language | English |
| last_indexed | 2024-03-05T20:10:58Z |
| publishDate | 2017 |
| publisher | ACG Publications |
| record_format | dspace |
| spelling | utm.eprints-757252018-04-30T13:12:03Z http://eprints.utm.my/75725/ Bioassay-guided isolation of antioxidants and ?-Glucosidase inhibitors from the root of cassia sieberiana D.C. (fabaceae) Jibril, S. Sirat, H. M. Basar, N. QD Chemistry Bioassay-guided isolation was used to investigate the antioxidants and α-glucosidase inhibitors from extract of root of Cassia sieberiana. The ethyl acetate fraction demonstrated strong free radical scavenging (DPPH and ABTS+) and potent α-glucosidase inhibition. The subsequent fractionation and purification of the ethyl acetate fraction using silica gel chromatography and Sephadex LH-20, yielded; islandicin (1), chrysophanol (2), physcion (3), emodin (4), quercetin (5), kaempferol (6), dihydrokaempferol (7), and piceatannol (8). Quercetin (5) showed the most active antioxidant activity with IC50 values of 1.58 mM and 1.30 mM against DPPH and ABTS+ radicals, followed by piceatannol (8) with IC50 values of 3.96 mM and 3.28 mM, which is better than the standard BHT (with IC50 value 8.93 mM) and trolox (with IC50 value 8.25 mM), for DPPH and ABTS+ radicals scavenging activities, respectively. For the α-glucosidase inhibitory assay, quercetin (5) and piceatannol (8) showed higher potency against α-glucosidase with IC50 values of 5.73 μM and 7.37 μM respectively, than standard quercetin with IC50 value of 9.20 μM and acarbose with IC50 value of 14.12 μM. This study presents the first report on the α-glucosidase inhibitors from root of C. sieberiana and all the compounds are isolated from this source for the first time. ACG Publications 2017 Article PeerReviewed application/pdf en http://eprints.utm.my/75725/1/HasnahMohdSirat_Bioassay-GuidedIsolationofAntioxidantsanda-Glucosidase.pdf Jibril, S. and Sirat, H. M. and Basar, N. (2017) Bioassay-guided isolation of antioxidants and ?-Glucosidase inhibitors from the root of cassia sieberiana D.C. (fabaceae). Records of Natural Products, 11 (4). pp. 406-410. ISSN 1307-6167 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85020407947&partnerID=40&md5=d82667dd644d6e6a0519e8f0108cdbd0 |
| spellingShingle | QD Chemistry Jibril, S. Sirat, H. M. Basar, N. Bioassay-guided isolation of antioxidants and ?-Glucosidase inhibitors from the root of cassia sieberiana D.C. (fabaceae) |
| title | Bioassay-guided isolation of antioxidants and ?-Glucosidase inhibitors from the root of cassia sieberiana D.C. (fabaceae) |
| title_full | Bioassay-guided isolation of antioxidants and ?-Glucosidase inhibitors from the root of cassia sieberiana D.C. (fabaceae) |
| title_fullStr | Bioassay-guided isolation of antioxidants and ?-Glucosidase inhibitors from the root of cassia sieberiana D.C. (fabaceae) |
| title_full_unstemmed | Bioassay-guided isolation of antioxidants and ?-Glucosidase inhibitors from the root of cassia sieberiana D.C. (fabaceae) |
| title_short | Bioassay-guided isolation of antioxidants and ?-Glucosidase inhibitors from the root of cassia sieberiana D.C. (fabaceae) |
| title_sort | bioassay guided isolation of antioxidants and glucosidase inhibitors from the root of cassia sieberiana d c fabaceae |
| topic | QD Chemistry |
| url | http://eprints.utm.my/75725/1/HasnahMohdSirat_Bioassay-GuidedIsolationofAntioxidantsanda-Glucosidase.pdf |
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