In vitro and in vivo acute antihyperglycemic effects of five selected indigenous plants from Jordan used in traditional medicine |
| |
Authors: | Kasabri Violet Afifi Fatma U Hamdan Imad |
| |
Institution: | a Department of Biopharmaceutics and Clinical Pharmacy, Jordan b Department of Pharmaceutical Sciences, Jordan |
| |
Abstract: | Ethnopharmacological relevanceAchillea santolina L., Pistacia atlantica Desf, Rheum ribes L., Sarcopoterium spinosum (L.) Spach and Teucrium polium L. have traditionally been used as herbal antidiabetic medicines. However their alleged benefits and mechanisms remain elusive.Aim of the studyThis study aimed to evaluate the effect of water extracts of these plants in in vitro and in vivo experiments.Materials and methodsIn vitro enzymatic starch digestion with aqueous extracts from plants at concentrations of 1, 5, 10, 12.5, 25, 50 and 100 mg/ml was assayed using α-amylase and α-amyloglucosidase. Acarbose was used as control and glucose liberation was determined by glucose oxidase method. Oral starch tolerance test (OSTT) and oral glucose tolerance test (OGTT) were determined for the plant extracts at concentrations 125, 250 and 500 mg/kg b.wt. on Sprague-Dawley rats. Blood glucose levels in rats treated with plant extracts and drugs (acarbose or metformin and glipizide) were measured at −30, 0, 45, 90 and 135 min.ResultsCompared to acarbose (IC50 = 1.2 μg/ml), water extracts of Pistacia atlantica, Rheum ribes and Sarcopoterium spinosum exerted significant dose dependent dual inhibition of α-amylase and α-glucosidase in in vitro enzymatic starch digestion bioassay, with IC50s; 46.98, 58.9 and 49.9 mg/ml, respectively. Comparable in vivo results were obtained for starch-fed rats, exhibiting significant acute postprandial antihyperglycemic efficacies. While Achillea santolina and Teucrium polium extracts lacked any favourable in vitro anti-α-amylase and anti-α-glucosidase effect, other modes of action can possibly explain their substantial acute antihyperglycemic activities in starch-treated rats. Except for Pistacia atlantica extracts, none of the investigated extracts qualified for improving the glucose intolerance in fasted rats on glucose loading.ConclusionsPistacia atlantica, Rheum ribes and Sarcopoterium spinosum can be considered as potential candidates for amelioration/management of type 2 diabetes. |
| |
Keywords: | Medicinal plants Diabetes Acarbose Enzymatic starch digestion OGTT OSTT |
本文献已被 ScienceDirect PubMed 等数据库收录! |
|