Antihyperglycemic activity and chemical constituents of Eysenhardtia platycarpa.
The methanolic extracts from branches (BEP) and leaves (LEP) of Eysenhardtia platycarpa significantly decreased the blood glucose levels in normal and streptozotocin (STZ)-induced diabetic rats. One new flavone, (1"R)-5,4',1"-trihydroxy-6,7-(3",3"-dimethylchroman)flavone (1), together with the known compounds 5,7-dihydroxy-6-methyl-8-prenylflavanone (3), 5,7-dihydroxy-8-methyl-6-prenylflavanone (4), 5,7-dihydroxy-6-prenylflavanone (5), 5,7-dihydroxy-8-prenylflavanone (6), 3-O-acetyloleanolic acid (7), oleanolic acid, 3beta-acetoxy-11alpha,12alpha-epoxy-oleanan-28,13beta-olide, lupeol, betulinic acid, beta-sitosterol, beta-sitosteryl beta-D-glucopyranoside, beta-sitosteryl palmitate, and 3-O-methyl-myo-inositol were isolated from BEP. Additionally, one new flavanone, (2S)-4'-O-methyl-6-methyl-8-prenylnaringenin (2), as well as the known compounds 3, 4, 6, 4'-O-methyl-8-prenylnaringenin (8), and 5-hydroxy-7-methoxy-8-prenylflavanone (9) were isolated from LEP. 3-O-Acetyloleanolic acid (7), identified as the major constituent of BEP, showed a significant decrease (31 mg/kg of body weight, P < 0.05) in the glucose level of STZ-induced diabetic rats. The obtained results correlate with the traditional use of this species.
Narvaez-Mastache
José M
JM
Instituto de Química de la Universidad Nacional Autónoma de México, Circuito Exterior, Ciudad Universitaria, Coyoacán 04510, México D.F.
Garduño-Ramírez
María Luisa
ML
Alvarez
Laura
L
Delgado
Guillermo
G
D000818:Animals; D001786:Blood Glucose / Q000187:drug effects; D007887:Fabaceae / Q000737:chemistry*; D047309:Flavones / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology; D007004:Hypoglycemic Agents / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology; D008297:Male; D008800:Mexico; D023421:Models, Animal; D015394:Molecular Structure; D018515:Plant Leaves / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry*; D051381:Rats; D017208:Rats, Wistar; D013311:Streptozocin / Q000494:pharmacology*
C516421:(1''R)-5,4',1''-trihydroxy-6,7-(3'',3''-dimethylchroman)flavone; D001786:Blood Glucose; D047309:Flavones; D007004:Hypoglycemic Agents; D013311:Streptozocin