Modulation of glucose transporter (GLUT4) by vanadate and Trigonella in alloxan-diabetic rats.
Oral administration of vanadate is an effective treatment for diabetes in animal models. However, vanadate exerts these effects at high doses and several toxic effects are produced. Low doses of vanadate are relatively safe but are unable to elicit any antidiabetic effect. The present study explored the prospect of using low doses of vanadate in combination with Trigonella seed powder (TSP) to evaluate their antidiabetic effect in alloxan-diabetic rats. Alloxan-diabetic rats were treated with insulin, vanadate, TSP and vanadate and TSP in combination for 3 weeks. The effect of these antidiabetic compounds was examined on general physiological parameters and distribution of glucose transporter (GLUT4) in skeletal muscle by immunoblotting and immunohistochemistry. Treatment of alloxan-diabetic rats with insulin, vanadate, TSP and vanadate in combination with TSP revived normoglycemia and restored the disturbances in the distribution of GLUT4 in skeletal muscle. TSP treatment was only partially effective in the restoration of diabetic alterations. The treatment of diabetic rats with combined doses of vanadate and TSP was most effective in the normalization of plasma glucose levels and correction of altered GLUT4 distribution.
Mohammad
Sameer
S
School of Life Sciences, Jawaharlal Nehru University, New Delhi 110067, India.
Taha
Asia
A
Bamezai
R N K
RN
Baquer
Najma Zaheer
NZ
D000496:Alloxan; D000818:Animals; D001786:Blood Glucose; D002458:Cell Fractionation; D003921:Diabetes Mellitus, Experimental / Q000188:drug therapy* / Q000378:metabolism; D004305:Dose-Response Relationship, Drug; D004359:Drug Therapy, Combination; D005260:Female; D051275:Glucose Transporter Type 4 / Q000378:metabolism*; D007004:Hypoglycemic Agents / Q000493:pharmacokinetics / Q000627:therapeutic use*; D007328:Insulin / Q000494:pharmacology; D018482:Muscle, Skeletal / Q000187:drug effects / Q000378:metabolism / Q000473:pathology; D010936:Plant Extracts / Q000493:pharmacokinetics / Q000627:therapeutic use; D051381:Rats; D017208:Rats, Wistar; D029910:Trigonella / Q000737:chemistry*; D014638:Vanadates / Q000493:pharmacokinetics / Q000627:therapeutic use*
D001786:Blood Glucose; D051275:Glucose Transporter Type 4; D007004:Hypoglycemic Agents; D007328:Insulin; D010936:Plant Extracts; D014638:Vanadates; D000496:Alloxan