Effects of Ingested Turmeric Oleoresin on Glucose and Lipid Metabolisms in Obese Diabetic Mice: A DNA Microarray Study
| Autor: | Tozo Nishiyama, Hideyuki Kishida, Tanaka Hozumi, Keiko Abe, Aoki Fumiki, Shinji Okada, Tatsumasa Mae, Ichiro Matsumoto, Shin-ichi Honda |
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| Rok vydání: | 2006 |
| Předmět: |
Blood Glucose
Mice Obese Type 2 diabetes Biology law.invention Mice chemistry.chemical_compound Curcuma law medicine Animals Hypoglycemic Agents Plant Oils Ingestion Oleoresin Food science Essential oil Oligonucleotide Array Sequence Analysis Plant Extracts General Chemistry Metabolism Carbohydrate Lipid Metabolism biology.organism_classification medicine.disease Rhizome Diabetes Mellitus Type 2 chemistry Biochemistry Female General Agricultural and Biological Sciences Phytotherapy |
| Zdroj: | Journal of Agricultural and Food Chemistry. 54:9055-9062 |
| ISSN: | 1520-5118 0021-8561 |
| Popis: | Turmeric, the rhizome of Curcuma longa L., has a wide range of effects on human health. Turmeric oleoresin, an extract of turmeric, is often used for flavoring and coloring. Curcuminoids and turmeric essential oil are both contained in turmeric oleoresin, and both of these fractions have hypoglycemic effects. In the present study, we comprehensively assessed the effect of turmeric oleoresin on hepatic gene expression in obese diabetic KK-Ay mice using DNA microarray analysis and quantitative real-time polymerase chain reaction (PCR). Female KK-Ay mice aged 6 weeks (n = 6/group) were fed a high-fat diet containing turmeric oleoresin, curcuminoids, and essential oil for 5 weeks. The same diet without any of these fractions was used as a control diet. Ingestion of turmeric oleoresin and essential oil inhibited the development of increased blood glucose and abdominal fat mass, while curcuminoids only inhibited the increase in blood glucose. DNA microarray analysis indicated that turmeric oleoresin ingestion up-regulated the expression of genes related to glycolysis, beta-oxidation, and cholesterol metabolism in the liver of KK-Ay mice, while expression of gluconeogenesis-related genes was down-regulated. Real-time PCR analysis was conducted to assess the contribution of the curcuminoids and essential oil in turmeric oleoresin to the changes in expression of representative genes selected by DNA microarray analysis. This analysis suggested that curcuminoids regulated turmeric oleoresin ingestion-induced expression of glycolysis-related genes and also that curcuminoids and turmeric essential oil acted synergistically to regulate the peroxisomal beta-oxidation-related gene expression induced by turmeric oleoresin ingestion. These changes in gene expression were considered to be the mechanism by which the turmeric oleoresin affected the control of both blood glucose levels and abdominal adipose tissue masses. All of these results suggest that the use of whole turmeric oleoresin is more effective than the use of either curcuminoids or the essential oil alone. |
| Databáze: | OpenAIRE |
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