Oleanane Triterpenoids from the Leaves of Gymnema inodorum and Their Insulin Mimetic Activities.
J Nat Prod
; 83(4): 1265-1274, 2020 04 24.
Article
in En
| MEDLINE
| ID: mdl-32237726
ABSTRACT
During an effort to find insulin mimetic compounds, the leaves of Gymnema inodorum were shown to have a stimulatory effect on glucose uptake in 3T3-L1 adipocyte cells. Bioassay-guided fractionation on a 70% ethanol extract of G. inodorum was applied to yield two new (1 and 2) and two known (8 and 9) oleanane triterpenoids with a methyl anthranilate moiety together with five further new oleanane triterpenoids (3-7). The chemical structures of all isolates were determined based on their spectroscopic data, including IR, UV, NMR, and mass spectrometric analysis. The isolated compounds (1-9) were determined for their stimulatory activities on glucose uptake in differentiated 3T3-L1 adipocyte cells using 2-deoxy-2-[(7-nitro-2,1,3-benzoxadiazol-4-yl)amino]-d-glucose (2-NBDG) as a fluorescent-tagged glucose probe. Three compounds (3, 5, and 9) showed stimulatory effects on the uptake of 2-NBDG in 3T3-L1 adipocyte cells. Chemicals with a methyl anthranilate moiety have been considered as crucial contributors of flavor odor in foods, and quantitative analysis showed the content of compound 8 to be 0.90 ± 0.01 mg/g of the total extract. These results suggest that the leaves of G. inodorum have the potential to be used as an antidiabetic functional food or tea.
Full text:
1
Database:
MEDLINE
Main subject:
Oleanolic Acid
/
Triterpenes
/
Deoxyglucose
/
Hypoglycemic Agents
/
Insulin
/
4-Chloro-7-nitrobenzofurazan
Limits:
Animals
Language:
En
Journal:
J Nat Prod
Year:
2020
Type:
Article