PMID- 27131093 OWN - NLM STAT- MEDLINE DCOM- 20170222 LR - 20170816 IS - 1873-4367 (Electronic) IS - 0927-7765 (Linking) VI - 145 DP - 2016 Sep 1 TI - Solid lipid microparticles for enhanced dermal delivery of tetracycline HCl. PG - 14-20 LID - S0927-7765(16)30291-0 [pii] LID - 10.1016/j.colsurfb.2016.04.034 [doi] AB - Acne vulgaris (commonly called acne) is a most common skin disease during adolescence, afflicting more than 85% of teenagers. Topical tetracycline (Tc) is used for mild inflammatory acne and as an adjunct to systemic treatment in more severe forms. Solid lipid microparticles (SLMs) are useful tool for topical delivery because of their biodegradable, biocompatible and low toxic characteristic accompanying with excellent skin hydration, occlusiveness and controlled release properties. The purpose of this study was to prepare Tc-loaded SLMs were produced by the spray drying technique and characterized by scanning electron microscopy, powder X-ray diffractometry and differential scanning calorimetry. In vitro and ex vivo release characteristics of Tc through SLMs and control formulations (aqueous carbopol gel) were evaluated over 24h using a vertical Franz diffusion cell through cellulose acetate membranes and exercised rat skin, respectively. SLM formulations present high encapsulation values above 97% without significant different among formulations (p<0.05). The sustained release pattern of Tc through SLMs was illustrated by in vitro release study. The ex vivo drug skin permeation study revealed that Tc dermal deposition of optimum SLMs formulation was about 7 times that of the control formulations. The enhanced skin penetration and accumulation of Tc observed for Tc-loaded SLMs may increase the efficiency of acne therapy and decrease the associated Tc side effects. CI - Copyright (c) 2016 Elsevier B.V. All rights reserved. FAU - Rahimpour, Yahya AU - Rahimpour Y AD - Research Center for Pharmaceutical Nanotechnology and Student Research Committee, Tabriz University of Medical Sciences, Tabriz, Iran. FAU - Javadzadeh, Yousef AU - Javadzadeh Y AD - Biotechnology Research Center and Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran. FAU - Hamishehkar, Hamed AU - Hamishehkar H AD - Drug Applied Research Center, Tabriz University of Medical Sciences, Tabriz, Iran. Electronic address: hamishehkarh@tbzmed.ac.ir. LA - eng PT - Journal Article DEP - 20160422 PL - Netherlands TA - Colloids Surf B Biointerfaces JT - Colloids and surfaces. B, Biointerfaces JID - 9315133 RN - 0 (Drug Carriers) RN - 0 (Lipids) RN - 0 (Tetracyclines) SB - IM MH - Administration, Cutaneous MH - Drug Carriers/chemistry MH - Lipids/*chemistry MH - Microscopy, Electron, Scanning MH - Nanoparticles/*chemistry/ultrastructure MH - Skin Absorption MH - Tetracyclines/*chemistry OTO - NOTNLM OT - Acne OT - Dermal drug delivery OT - SLM OT - Skin OT - Solid lipid microparticle OT - Tetracycline EDAT- 2016/05/01 06:00 MHDA- 2017/02/23 06:00 CRDT- 2016/05/01 06:00 PHST- 2015/12/16 00:00 [received] PHST- 2016/04/15 00:00 [revised] PHST- 2016/04/17 00:00 [accepted] PHST- 2016/05/01 06:00 [entrez] PHST- 2016/05/01 06:00 [pubmed] PHST- 2017/02/23 06:00 [medline] AID - S0927-7765(16)30291-0 [pii] AID - 10.1016/j.colsurfb.2016.04.034 [doi] PST - ppublish SO - Colloids Surf B Biointerfaces. 2016 Sep 1;145:14-20. doi: 10.1016/j.colsurfb.2016.04.034. Epub 2016 Apr 22.