PMID- 25855302 OWN - NLM STAT- MEDLINE DCOM- 20160225 LR - 20181113 IS - 1432-0991 (Electronic) IS - 0343-8651 (Linking) VI - 71 IP - 1 DP - 2015 Jul TI - Co-spinning of Silver Nanoparticles with Nisin Increases the Antimicrobial Spectrum of PDLLA: PEO Nanofibers. PG - 24-30 LID - 10.1007/s00284-015-0813-y [doi] AB - Silver nanoparticles (AgNPs), synthesized using N,N-dimethylformamide (DMF), were electrospun with nisin in a 50:50 blend of 24 % (w/v) poly(D,L-lactide) (PDLLA) and poly(ethylene oxide) (PEO). Addition of AgNPs decreased the average diameter of the nanofibers [silver nanofibers (SF)] from 588 +/- 191 to 281 +/- 64 nm, or to 288 +/- 63 nm when nisin was co-spun with AgNPs. Nanofibers containing AgNO3 (SF) had a beads-on-string structure, whereas nanofibers with AgNPs and nisin [silver plus nisin nanofibers (SNF)], nanofibers with only nisin [nisin nanofibers (NF)], and nanofibers without AgNPs and nisin [control nanofibers] had a uniform structure. The irregular topography was confirmed by atomic force microscopy. No interactions occurred between silver, nisin, PDLLA, and PEO, as confirmed with Fourier transform infrared spectroscopy. Most of the AgNPs (18 +/- 2.8 ppm) and nisin (78.1 +/- 1.2 microg/ml) were released within the first 2 h. SF and SNF inhibited the growth of gram-positive and gram-negative bacteria, whereas NF failed to inhibit gram-negative bacteria. A wound dressing with broad-spectrum antimicrobial activity may be developed by the incorporation of nanofibers containing a combination of AgNPs and nisin. FAU - Ahire, Jayesh J AU - Ahire JJ AD - Department of Microbiology, University of Stellenbosch, Matieland, Stellenbosch, 7602, South Africa. FAU - Neveling, Deon P AU - Neveling DP FAU - Dicks, Leon M T AU - Dicks LM LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20150409 PL - United States TA - Curr Microbiol JT - Current microbiology JID - 7808448 RN - 0 (Anti-Bacterial Agents) RN - 0 (Epoxy Compounds) RN - 0 (PEO-poly(lactide)) RN - 0 (Polyesters) RN - 1414-45-5 (Nisin) RN - 3M4G523W1G (Silver) SB - IM MH - Anti-Bacterial Agents/*chemistry/*pharmacology MH - Epoxy Compounds/*chemistry/*pharmacology MH - Gram-Negative Bacteria/drug effects MH - Gram-Positive Bacteria/drug effects MH - Microscopy, Atomic Force MH - Microscopy, Electron, Scanning MH - Nanofibers/*chemistry/ultrastructure MH - Nisin/*pharmacology MH - Polyesters/*chemistry/*pharmacology MH - Silver/*pharmacology EDAT- 2015/04/10 06:00 MHDA- 2016/02/26 06:00 CRDT- 2015/04/10 06:00 PHST- 2014/12/01 00:00 [received] PHST- 2015/02/26 00:00 [accepted] PHST- 2015/04/10 06:00 [entrez] PHST- 2015/04/10 06:00 [pubmed] PHST- 2016/02/26 06:00 [medline] AID - 10.1007/s00284-015-0813-y [doi] PST - ppublish SO - Curr Microbiol. 2015 Jul;71(1):24-30. doi: 10.1007/s00284-015-0813-y. Epub 2015 Apr 9.