Development and optimization of thiolated dendrimer as a viable mucoadhesive excipient for the controlled drug delivery: An acyclovir model formulation

Abstract In the present study we report the development of novel thiolated dendrimers for mucoadhesive drug delivery. The thiolated dendrimers were synthesized by conjugating PAMAM dendrimer (G3.5)with cysteamine at two different molar ratios, i.e. 1:30 (DCys1) and 1:60 (DCys2). The thiolated dendri...

Full description

Saved in:
Bibliographic Details
Published in:Nanomedicine 2013-05, Vol.9 (4), p.514-522
Main Authors: Yandrapu, Sarath K., PhD, Kanujia, Parijat, PhD, Chalasani, Kishore B., PhD, Mangamoori, Lakshminarasu, PhD, Kolapalli, Ramanamurthy V., PhD, Chauhan, Abhay, PhD
Format: Article
Language:English
Subjects:
Acyclovir - administration & dosage
Acyclovir formulations
Adhesives
Antiviral Agents - administration & dosage
Chromatography, High Pressure Liquid
Dendrimers
Dendrimers - administration & dosage
Drug delivery
Drug Delivery Systems
Excipients
Internal Medicine
Models, Chemical
Muco adhesion
Mucous Membrane
Sulfhydryl Compounds - chemistry
Thiol polymers
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Abstract In the present study we report the development of novel thiolated dendrimers for mucoadhesive drug delivery. The thiolated dendrimers were synthesized by conjugating PAMAM dendrimer (G3.5)with cysteamine at two different molar ratios, i.e. 1:30 (DCys1) and 1:60 (DCys2). The thiolated dendrimers were further encapsulated with acyclovir (DCys1Ac and DCys2Ac) and the conjugates were characterized for thiol content, drug loading, drug release, and mucoadhesive behavior. The thiolated dendrimer conjugates showed thiol content of 10.56±0.34 and 68.21±1.84 μM/mg of the conjugate for DCys1 and DCys2, respectively. The acyclovir loading was observed to be highest in dendrimer drug conjugate (DAc) compared to other DCys1Ac and DCys2Ac conjugates. The thiolated dendrimers showed sustained release of acyclovir and showed higher mucoadhesion. The in vitro mucoadhesive activity of DCys2Ac was 1.53 and 2.89 fold higher mucoadhesion compared to DCys1Ac and DAc, respectively. These results demonstrated the usefulness of thiolated dendrimers as a mucoadhesive carrier and represent a novel platform for drug delivery. From the Clinical Editor This study demonstrates the utility of thiolated dendrimers as mucoadhesive carriers as reported in an acyclovir delivery model system.
ISSN:1549-9634
1549-9642
DOI:10.1016/j.nano.2012.10.005