4.8 Article Proceedings Paper

Immobilized keratinase and enrofloxacin loaded on pectin PVA cryogel patches for antimicrobial treatment

期刊

BIORESOURCE TECHNOLOGY
卷 145, 期 -, 页码 280-284

出版社

ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2013.02.063

关键词

PVA cryogels; Keratinase; Enrofloxacin; Controlled release; Wound healing

资金

  1. CONICET (National Council for Science and Technology of Argentine) [PIPs 112-200801-01422, 0214]
  2. National Agency of Scientific and Technological Promotion (ANPCyT)
  3. UNLP (National University of La Plata) [11/X522, 11/545, PRH 5.2]

向作者/读者索取更多资源

A keratinase isolated from Paecilomyces lilacinus (LPS #876) was tested against proteins present in the skin but the high enzyme activity was detected on collagen. Keratinase was physically immobilized onto PVA-pectin cryogels and enzyme release was 20.8 +/- 2.1%, 63.8 +/- 0.2%, 41.5 +/- 3.5% and 26.0 +/- 3.5% in cryogels containing pectins with esterification degrees (DE) 33.0%, 55.0%, 62.7% and 71.7% respectively at 37 degrees C after 3 h incubation. In presence of 0.75 M NaCl, the percentage of enzyme release changed to: 57.5 +/- 1.5, 65.8 +/- 3.8, 57.3 +/- 0.2 and 34.0 +/- 4.0 for the four pectins respectively. In-vitro studies of enrofloxacin release from PVA-pectin cryogels at pH close to the human skin (pH = 5.5) showed 15.0% free antibiotic following first order kinetic at 37 degrees C after 5 h incubation. However, in the presence of keratinase only 6.9% of enrofloxacin was released under the same experimental conditions. (C) 2013 Elsevier Ltd. All rights reserved.

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