• Proceedings of the PSK Conference
• /
• 2003.10b
• /
• pp.186.2-186.2
• /
• 2003

PPARs (peroxisome proliferator activated receptors) are member of nuclear hormone receptors superfamily. Activations of PPARs upon binding with ligands modulate glucose metabolite, differentiation of adipocyte, inflammation response, and so on. Thiazolidinedione analog is one of the potential antidiabetic drug that binds and activates PPAR selectively and enhances insulin sensitivity. In an effort to develop novel and effective antidiabetic thiazolidindione analogs, we have synthesized tetrahydroquinoline and para-substituted benzene-linked thiazolidinedione analogs by coupling reaction of the hydrophobic segments with hydroxybenzylthiazolidinedione.

• Proceedings of the PSK Conference
• /
• 2002.10a
• /
• pp.260.2-260.2
• /
• 2002

SPH-2 is a herbal medicine composing oriental prescription. We have studied the antidiabetic effect and mechanism of SPH-2 in insulin-resistant diabetic db/db mice. Mice were grouped and treated for 3 weeks as follows: control group was administrated with tap water orally: treated group was administrated with SPH-2 orally at dose of 500 mg/kg. SPH-2 lowered plasma glucose level by 43% as compared to the diabetic control. Total cholesterol. triglyceride and free fatty acid were all reduced in SPH-2 treated group. (omitted)

• Journal of the Korean Applied Science and Technology
• /
• v.32 no.2
• /
• pp.226-231
• /
• 2015

This study was carried to investigate the antidiabetic effect of ethanol extract in Streptozotocin(STZ)-induced diabetic rats. Diabetes was induced by intravenous injection of STZ at a dose of 45mg/kg dissolved in citrate buffer. The ethanol extract of Forsythia Koreana(F.K) was orally administrated once a day for 7 days at a dose of 1,000mg/kg. The contents of serum glucose, triglyceride(TG), total cholesterol were significantly decreased in F.K treated group compared to the those of STZ-control group. The content of hepatic glycogen and activity of glucokinase(GK) were significantly increased, and activity of glucose-6-phoshatase(G-6-Pase) was significantly decreased in F.K treated group compared to the those of STZ-control group, but activity of glucose-6-phosphate dehydrogenase(G-6-PDH) was not significantly increased, These results indicated that ethanol extract of F.K would have antidiabetic effect in STZ-induced diabetic rats.

• Journal of the Korean Applied Science and Technology
• /
• v.33 no.2
• /
• pp.271-277
• /
• 2016

This study was done to investigate the antidiabetic effect of ethanol extract from Codonopsis lanceolata root in Streptozotocin (STZ)-induced diabetic rats. Diabetes was induced by intravenous injection of STZ at a dose 45mg/kg.b.w. dissolved in citrate buffer(pH4.5). The ethanol extract of Codonopsis lanceolata root was orally administrated once a day for 7 days. The contents of serum glucose, triglyceride(TG) and total cholesterol were significantly decreased(p<0.05) in Codonopsis lanceolata root treated group compared to the those of STZ-control group. Also the content of hepatic glycogen and activities of glucose-phosphate dehydrogenase(G-6-PDH) and glucokinase(GK) were significamtly increased(p<0.05). These results indicated that ethanol extract of Codonopsis lanceolata root would have antidiabetic effect in STZ-induced diabetic rats.

• Journal of the Korean Applied Science and Technology
• /
• v.37 no.4
• /
• pp.682-687
• /
• 2020

This study was performed to investigate the antidiabetic effect of ethanol extract of Phelladrindron Amurense Rupr (P.A) in Streptozotocin(STZ) induced diabetic rats. Diabetes was induced by intravenous injection of STZ at a dose of 45mg/kg,b.w. dissolved in citrate buffer. The ethanol extract of P. A was orally administrated once a day for 7 days at a dose of 1,000mg/kg. The content of serum glucose, was significantly decreased in P.A treated group compared to the those of STZ-control group. The content of hepatic glycogen and activities of glucokinase(GK) and glucose-6-phosphate dehydrogenase(G-6-PDH) were significantly increased(p<0.05), and activity of glucose-6-phoshatase(G-6-Pase) was significantly decreased(p<0.05) in P.A treated group compared to those of STZ-control group, These results indicated that ethanol extract of P.A have antidiabetic effect in STZ-induced diabetic rats.

• Nutrition Research and Practice
• /
• v.7 no.2
• /
• pp.103-108
• /
• 2013

A folk prescription consisting of Alnus hirsuta, Rosa davurica, Acanthopanax senticosus and Panax schinseng has been used in the treatment of diabetes mellitus. The aim of the present investigation was to evaluate the antidiabetic effects of the herb formula extract (HFE) composed of Alnus hirsuta, Rosa davurica, Acanthopanax senticosus and Panax schinseng in the streptozotocin (STZ)-induced diabetic rats. The HFE was mixed in the food supply of the healthy and STZ-induced diabetic male Sprague-Dawley rats, and its effects on the body weight, water and food intake, hyperglycemia, hypolipidemic and islet structure were studied. The treatment of the rats with STZ for 6 weeks resulted in marasmus, polydipsia, polyphagia, hyperglycemia and hypoinsulinemia. In addition, the diabetic rats showed an apparent decrease in the insulin immunoreactivity and the number of ${\beta}$-cells in the pancreas. The addition of the HFE to the rats' food supply significantly lowered the serum glucose and the serum triglycerides level and preserved the normal histological appearance of the pancreatic islets. These results indicate that the HEF have a strong antidiabetic potential along with the significant hypoglycemic and hypolipidemic effects, which may be applicable in the pharmaceutical industry.

• 한국인삼전략화협의회:학술대회논문집
• /
• v.2003 no.09
• /
• pp.77-88
• /
• 2003

"Ginseng (Panax ginseng C.A. Meyer) has been a popular herbal remedy used in eastern Asian cultures for thousands of years, and a number of health claims are made for it. Modern therapeutic claims for ginseng refer to vitality, immune function, cancer, cardiovascular diseases, diabetes and sexual function. These claims are mostly based on uncontrolled or non-randomized studies. Among modern therapeutic claims, however, therapeutic effects for diabetes can reasonably be accepted. Following experiment was done recently in our lab: this study was designed to compare the antidiabetic activities between Ginseng Radix Alba (GRA), Ginseng Radix Rubra (GRR) and Panax Quinquefoli Radix (PQR) in multiple low dose (MLD) streptozotocin (STZ) (20mg/kg i.p injection for 5 days) induced diabetic rats. In the glucose tolerance test, 500mg/kg of each ginseng ethanol extract was admoinistered intraperitoneally 30min before glucose challenge. While GRA failed to lower blood glucose level, GRR and PQR both significantly prevented the hyperglycemia when compared with the control group. In the MLD STZ-induced diabetic rats, 300 mg/kg of each ginseng ethanol extract was administered intraperitoneally for 2 weeks. Plasma glucose and insulin levels were markedly improved in all treatment groups. While GRR showed the highest antidiabetic activity, and GRA and PQR revealed somewhat equipotent antidiabetic activities, but less than that in GRR-treated group as for as blood parameters and diabetic symptoms such as polydipsia are concerned. Blood glucose levels were closely associated with plasma insulin levels, and this result may suggest that ginseng ethanol extracts showed the activity to enhance insulin secretion as well as preventing destruction of pancreatic islet cells. To elucidate the relationship between antidiabetic activity and ginsenoside profiles, seven major ginsenoside were quantified by HPLC. We figured out the fact that protopanaxatriol (PPT) : proptopanaxadiol (PPD) ratio might play an important role in its hypoglycemia effects."

• Korean Journal of Pharmacognosy
• /
• v.44 no.1
• /
• pp.75-82
• /
• 2013

Previous studies have shown that Aloe QDM complex, which is consisted of chromium (Cr), aloesin (ALS) and processed Aloe vera gel (PAG), exert antidiabetic activity in a high fat diet-induced mouse model of type 2 diabetes. In this study we examined the mechanism of the antidiabetic activity of the Aloe QDM complex. Rat myoblast cell line L6 cells were cultured in the presence of Cr, ALS, and PAG alone and in combinations, and then the capability of the cells to uptake glucose was examined using radiolabeled glucose. All of the 3 agents, Cr, ALS and PAG, exerted glucose uptake-enhancing activity in L6 cells. The most potent capability to uptake glucose was observed when L6 cells were cultured with the Aloe QDM complex. The activity of the Aloe QDM complex to enhance glucose uptake was prominent in conditions where existing insulin concentrations are low. We also examined the effects of the Aloe QDM complex on the plasma membrane expression of GLUT4 in L6 cells. The Aloe QDM complex increased the content of GLUT4 in the plasma membrane, while decreasing the content of GLUT4 in the light microsome. Taken together, these results show that the antidiabetic activity of the Aloe QDM complex is at least in part due to the stimulation of glucose uptake into the muscle cells, and this activity of the Aloe QDM complex is mediated through the enhancement of the translocation of GLUT4 into the plasma membrane.

• Journal of Physiology & Pathology in Korean Medicine
• /
• v.21 no.2
• /
• pp.468-473
• /
• 2007

The antidiabetic effect of Amomum xanthioides(A. xanthioides) extract was investigated. Alloxan caused the hyperglycemia and hypoinsulinemia by a selective destruction of pancreatic ${\beta}$-cell. Pretreatment of mouse with A. xanthiodies extract for 2 days prior to alloxan administration completely protected hyperglycemia induced by alloxan. In addition, administration of A. xanthioides extract to alloxan-induced diabetic mouse significantly abolished hyperglycemia, hypoinsulinemia, and, the reduction of size and number of insulin-secreting cells induced by alloxan. Administration of A. xanthioides extract to alloxan-induced diabetic mouse rapidly increased pancreatic Reg gene expression to 7 days, and then decreased. In alloxan-diabetic mouse. Reg gene expression was increased at 3 days after alloxan injection, and sustained until 24 days. The present results indicate that A. xanthioides extract contains potentially effective components exhibiting both protection and treatment of alloxan-induced diabetes. These results suggested that the antidiabetic effect of A. xanthoides extract may be mediated through the regeneration of pancreatic ${\beta}$-cells.

• Advances in Traditional Medicine
• /
• v.5 no.3
• /
• pp.201-208
• /
• 2005

Earlier we have reported the antidiabetic activity of fresh juice of rhizomes of Zingiber officinale (Z. officinale) and its correlation with 5-HT receptor antagonism. Since 6-gingerol the marker compound of Z. officinale is reported to posses 5-HT anatgonistic activity, the present investigation, was undertaken to find out the concentration of 6-gingerol present in methanolic extract of Z. officinale and its different fractions (petroleum ether, toluene and chloroform). We also evaluated these fractions for antidiabetic activity in streptozotocin (STZ)-induced neonatal type 2 diabetic rats. Fasting glucose and insulin levels in non insulin dependent diabetes mellitus (NIDDM) rats were found to be significantly (P < 0.05) higher than control rats and these were significantly decreased by treatment with methanolic extract of Z. officinale and its fractions. The results of oral glucose tolerance test (OGTT) showed that methanolic extract and its fractions significantly (P < 0.05) decreased both STZ-induced increase in $AUC_{glucose}$ and $AUC_{insulin}$ values in NIDDM groups. Treatment with petroleum ether fraction produced a greater reduction in elevated glucose and $AUC_{glucose}$ levels as compared to treatment with other fractions. Treatment with methanolic extract of Z. officinale and its fractions also produced significant reduction in the elevated lipid, serum glutamate oxaloacetate transaminase (SGOT) and serum glutamate pyruvate transaminase (SGPT) levels in NIDDM rats. The effect of petroleum ether fraction on elevated lipid, SGOT and SGPT levels was significantly greater as compared to treatment with other fractions. The concentration of 6-gingerol was found to be maximum in petroleum ether fraction (11.430%) and minimum in chloroform fraction (0.973%). The methanolic extract and toluene fraction was found to contain 3.080% and 2.191 %, 6-gingerol respectively. In conclusion, our data suggest that methonolic extract and its fractions possess significant antidiabetic activity in NIDDM rats. The extent of activity appears to be dependent on the concentration of 6-gingerol present in the extract or its fractions.