incorporation and release kinetics of alpha-bisabolol from pcl and chitosan/guar gum membranes

incorporation and release kinetics of alpha-bisabolol from pcl and chitosan/guar gum membranes

;F. C. Bombaldi de Souza;R. F. Bombaldi de Souza;Â. M. Moraes
database and network journal Vol. 33 pp. 453-467
256
souzabrazilianincorporation

Abstract

Abstract Alpha-bisabolol, an anti-inflammatory and antioxidant compound extracted from candeia trees (Eremanthus erythropappus), was incorporated into hydrophobic polycaprolactone (PCL) and hydrophilic chitosan/guar gum (Ch-G) membranes aiming at the production of bioactive wound dressings. The incorporation efficiency achieved a maximum of ca. 18% (1 gram of alpha-bisabolol per gram of membrane) for Ch-G membranes. For PCL membranes, all of the active compound added was retained (0.2 gram of alpha-bisabolol per gram of membrane). Alpha-bisabolol release in phosphate-buffered saline was relatively slow in both cases, reaching around 6% and 24% after 120 hours respectively for PCL and Ch-G membranes presenting equivalent initial alpha-bisabolol/membrane mass ratios. Both formulations were capable of releasing alpha-bisabolol in the typically recommended topical dose range (from 1 to 10 grams of alpha-bisabolol per gram of vehicle). The extended release periods observed are advantageous, allowing less frequent dressing changes and contributing to turn the treatment more comfortable for the patient.

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217528
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10.1590/0104-6632.20160333s20150083
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Scimatic Chain (ID: 481)
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