Abstract
The antioxidant activity of lemon balm (Melissa officinalis) essential oil (LBEO) on 2,2-diphenyl-1-picrylhydrazyl (DPPH) radicals and its hypoglycaemic effect in db/db mice were investigated. LBEO scavenged 97% of DPPH radicals at a 270-fold dilution. Mice administered LBEO (0015mg/d) for 6 weeks showed significantly reduced blood glucose (65%; P<005) and TAG concentrations, improved glucose tolerance, as assessed by an oral glucose tolerance test, and significantly higher serum insulin levels, compared with the control group. The hypoglycaemic mechanism of LBEO was further explored via gene and protein expression analyses using RT-PCR and Western blotting, respectively. Among all glucose metabolism-related genes studied, hepatic glucokinase and GLUT4, as well as adipocyte GLUT4, PPAR-, PPAR- and SREBP-1c expression, were significantly up-regulated, whereas glucose-6-phosphatase and phosphoenolpyruvate carboxykinase expression was down-regulated in the livers of the LBEO group. The results further suggest that LBEO administered at low concentrations is an efficient hypoglycaemic agent, probably due to enhanced glucose uptake and metabolism in the liver and adipose tissue and the inhibition of gluconeogenesis in the liver.
| Original language | English |
|---|---|
| Pages (from-to) | 180-188 |
| Number of pages | 9 |
| Journal | British Journal of Nutrition |
| Volume | 104 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - 2010 Jul 1 |
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Keywords
- Glucokinase
- GLUT4
- Hyperglycaemic effects
- Lemon balm (Melissa officinalis)
- Sterol regulatory element-binding protein-1c
ASJC Scopus subject areas
- Medicine(all)
- Medicine (miscellaneous)
- Nutrition and Dietetics
Cite this
Anti-diabetic effects of lemon balm (Melissa officinalis) essential oil on glucose- and lipid-regulating enzymes in type 2 diabetic mice. / Chung, Mi J.; Cho, Sung Y.; Bhuiyan, M. J H; Kim, Kyoung Heon; Lee, Sung-Joon.
In: British Journal of Nutrition, Vol. 104, No. 2, 01.07.2010, p. 180-188.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Anti-diabetic effects of lemon balm (Melissa officinalis) essential oil on glucose- and lipid-regulating enzymes in type 2 diabetic mice
AU - Chung, Mi J.
AU - Cho, Sung Y.
AU - Bhuiyan, M. J H
AU - Kim, Kyoung Heon
AU - Lee, Sung-Joon
PY - 2010/7/1
Y1 - 2010/7/1
N2 - The antioxidant activity of lemon balm (Melissa officinalis) essential oil (LBEO) on 2,2-diphenyl-1-picrylhydrazyl (DPPH) radicals and its hypoglycaemic effect in db/db mice were investigated. LBEO scavenged 97% of DPPH radicals at a 270-fold dilution. Mice administered LBEO (0015mg/d) for 6 weeks showed significantly reduced blood glucose (65%; P<005) and TAG concentrations, improved glucose tolerance, as assessed by an oral glucose tolerance test, and significantly higher serum insulin levels, compared with the control group. The hypoglycaemic mechanism of LBEO was further explored via gene and protein expression analyses using RT-PCR and Western blotting, respectively. Among all glucose metabolism-related genes studied, hepatic glucokinase and GLUT4, as well as adipocyte GLUT4, PPAR-, PPAR- and SREBP-1c expression, were significantly up-regulated, whereas glucose-6-phosphatase and phosphoenolpyruvate carboxykinase expression was down-regulated in the livers of the LBEO group. The results further suggest that LBEO administered at low concentrations is an efficient hypoglycaemic agent, probably due to enhanced glucose uptake and metabolism in the liver and adipose tissue and the inhibition of gluconeogenesis in the liver.
AB - The antioxidant activity of lemon balm (Melissa officinalis) essential oil (LBEO) on 2,2-diphenyl-1-picrylhydrazyl (DPPH) radicals and its hypoglycaemic effect in db/db mice were investigated. LBEO scavenged 97% of DPPH radicals at a 270-fold dilution. Mice administered LBEO (0015mg/d) for 6 weeks showed significantly reduced blood glucose (65%; P<005) and TAG concentrations, improved glucose tolerance, as assessed by an oral glucose tolerance test, and significantly higher serum insulin levels, compared with the control group. The hypoglycaemic mechanism of LBEO was further explored via gene and protein expression analyses using RT-PCR and Western blotting, respectively. Among all glucose metabolism-related genes studied, hepatic glucokinase and GLUT4, as well as adipocyte GLUT4, PPAR-, PPAR- and SREBP-1c expression, were significantly up-regulated, whereas glucose-6-phosphatase and phosphoenolpyruvate carboxykinase expression was down-regulated in the livers of the LBEO group. The results further suggest that LBEO administered at low concentrations is an efficient hypoglycaemic agent, probably due to enhanced glucose uptake and metabolism in the liver and adipose tissue and the inhibition of gluconeogenesis in the liver.
KW - Glucokinase
KW - GLUT4
KW - Hyperglycaemic effects
KW - Lemon balm (Melissa officinalis)
KW - Sterol regulatory element-binding protein-1c
UR - http://www.scopus.com/inward/record.url?scp=77955296858&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=77955296858&partnerID=8YFLogxK
U2 - 10.1017/S0007114510001765
DO - 10.1017/S0007114510001765
M3 - Article
C2 - 20487577
AN - SCOPUS:77955296858
VL - 104
SP - 180
EP - 188
JO - British Journal of Nutrition
JF - British Journal of Nutrition
SN - 0007-1145
IS - 2
ER -