Glyconanobiotics: Novel carbohydrated nanoparticle antibiotics for MRSA and Bacillus anthracis.

Abstract:

:This report describes the synthesis and evaluation of glycosylated polyacrylate nanoparticles that have covalently-bound antibiotics within their framework. The requisite glycosylated drug monomers were prepared from one of three known antibiotics, an N-sec-butylthio beta-lactam, ciprofloxacin, and a penicillin, by acylation with 3-O-acryloyl-1,2-O-isopropylidene-5,6 bis((chlorosuccinyl)oxy)-d-glucofuranose (7) or 6-O-acetyl-3-O-acryloyl-1,2-O-isopropylidene-5-(chlorosuccinyl)oxy-alpha-d-glucofuranose (10). These acrylated monomers were subjected to emulsion polymerization in a 7:3 (w:w) mixture of butyl acrylate-styrene in the presence of sodium dodecyl sulfate as surfactant (3 weight %) and potassium persulfate as a radical initiator (1 weight %). The resulting nanoparticle emulsions were characterized by dynamic light scattering and found to have similar diameters ( approximately 40 nm) and size distributions to those of our previously studied systems. Microbiological testing showed that the N-sec-butylthio beta-lactam and ciprofloxacin nanoparticles both have powerful in vitro activities against methicillin-resistant Staphylococcus aureus and Bacillus anthracis, while the penicillin-bound nanoparticles have no antimicrobial activity. This indicates the need for matching a suitable antibiotic with the nanoparticle carrier. Overall, the study shows that even relatively large, polar acrylate monomers (MW>1000 amu) can be efficiently incorporated into the nanoparticle matrix by emulsion polymerization, providing opportunities for further advances in nanomedicine.

journal_name

Bioorg Med Chem

authors

Abeylath SC,Turos E,Dickey S,Lim DV

doi

10.1016/j.bmc.2007.11.052

subject

Has Abstract

pub_date

2008-03-01 00:00:00

pages

2412-8

issue

5

eissn

0968-0896

issn

1464-3391

pii

S0968-0896(07)01020-6

journal_volume

16

pub_type

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