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International Journal of Medicinal Mushrooms
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ISSN Imprimer: 1521-9437
ISSN En ligne: 1940-4344

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International Journal of Medicinal Mushrooms

DOI: 10.1615/IntJMedMushrooms.2017021186
pages 607-617

Antidiabetic Properties of the Tiger's Milk Medicinal Mushroom, Lignosus rhinocerotis (Agaricomycetes), in Streptozotocin-Induced Diabetic Rats

Kar Lin Nyam
Department of Food Science with Nutrition, Faculty of Applied Sciences, UCSI University, Jalan Menara Gading, UCSI Heights (Taman Connaught), Cheras, Kuala Lumpur, Malaysia
Cheng Fhai Chow
Department of Food Science with Nutrition, Faculty of Applied Sciences, UCSI University, Jalan Menara Gading, UCSI Heights (Taman Connaught), Cheras, Kuala Lumpur, Malaysia
Chon Seng Tan
Ligno Biotech Sdn Bhd, Seri Kembangan, Selangor, Malaysia
Szu Ting Ng
Ligno Biotech Sdn Bhd, Seri Kembangan, Selangor, Malaysia

RÉSUMÉ

Diabetes mellitus is a major cause of morbidity and mortality worldwide. Although scientific evidence supporting its therapeutic efficacy is lacking, the use of the tiger's milk mushroom (TGM; Lignosus rhinocerotis), which is native to tropical areas such as Malaysia, Indonesia, and the Philippines, has been found to contain a very large amount of potential antioxidants. In this study, rats were weighed and then intravenously injected with 35 mg/kg streptozotocin (STZ). Rats were left for 1 week before blood glucose concentrations were measured to determine the onset of diabetes before the next procedure was conducted. Rats with blood glucose exceeding 7.0 mmol/L were considered diabetic and were included in the experiment. All groups were fed their respective treatments twice daily for 2 months throughout the experiment. Antidiabetic and antioxidant properties of freeze-dried TGM powder, such as reduced glutathione (GSH), superoxide dismutase (SOD), lipid peroxidation (LPO), and catalase (CAT) activities, were investigated in liver samples. The biological compounds present in the freeze-dried TGM powder was found to exhibit antidiabetic properties by significantly reducing elevated blood glucose concentrations to a normal range (3.0-7.0 mmol/L) in Sprague-Dawley rats with streptozotocin-induced diabetes, and increasing the body weight of the rats. Freeze-dried TGM powder was also found to possess antioxidant activity by significantly increasing GSH, CAT, and SOD activities while reducing LPO (P < 0.05). THis study shows that freeze-dried TGM powder exhibits significant antidiabetic properties and may be a potential supplement in ameliorating diabetic complications.


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