Effects on the bones of vanadyl acetylacetonate by oral administration: a comparison study in diabetic rats.
Oral delivery, rather than parenteral administration, would be beneficial for treating diabetic mellitus owing to the need for a long-term regimen. The objectives of this study were to evaluate oral delivery tolerance and the effects on the bone of accumulated vanadium following the long-term administration of vanadyl acetylacetonate (VAC). Normal and diabetic rats were intragastrically administered VAC at a dose of 3 mg vanadium/kg body weight once daily for 35 consecutive days. VAC did not cause any obvious signs of diarrhea, any changes in kidney or liver, or deaths in any group. The phosphate levels in the bone were slightly increased, and the calcium levels in the bone were not obviously changed as compared with those of the rat group not receiving VAC. After administration of VAC, the decreased ultimate strength, trabecular thickness, mineral apposition rate, and plasma osteocalcin in diabetic rats were either improved or normalized, but reduced bone mineral density (BMD) in diabetic rats was not improved. None of the parameters evaluated in normal rats were altered. The results indicate that the oral VAC is tolerated and benefits the diabetic osteopathy of rats, but seems not to influence the bone of normal rats. They also suggest that VAC improves diabetes-related bone disorders, primarily by improving the diabetic state.
Zhang
Shuang-Qing
SQ
School of Pharmaceutical Sciences and State Key Laboratory of Natural and Biomimetic Drugs, Peking University, 38 Xueyuan Road, Beijing 100083, China.
Chen
Guo-Hua
GH
Lu
Wan-Liang
WL
Zhang
Qiang
Q
D000284:Administration, Oral; D000818:Animals; D001696:Biomechanical Phenomena; D001786:Blood Glucose / Q000378:metabolism; D001835:Body Weight / Q000187:drug effects; D015519:Bone Density / Q000187:drug effects; D001842:Bone and Bones / Q000187:drug effects* / Q000378:metabolism; D002118:Calcium / Q000378:metabolism; D003921:Diabetes Mellitus, Experimental / Q000097:blood / Q000378:metabolism / Q000503:physiopathology*; D006885:Hydroxybutyrates / Q000008:administration & dosage / Q000494:pharmacology*; D008297:Male; D010422:Pentanones / Q000008:administration & dosage / Q000494:pharmacology*; D010710:Phosphates / Q000378:metabolism; D051381:Rats; D017207:Rats, Sprague-Dawley
D001786:Blood Glucose; D006885:Hydroxybutyrates; D010422:Pentanones; D010710:Phosphates; C049529:acetyl acetonate; D002118:Calcium
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