Synthesis, characterization and in vitro antibacterial assessments of a novel modified poly[maleic anhydride-alt-acrylic acid]/acriflavine conjugate


KAPLAN CAN H., KARAKUŞ G. , TUZCU N.

POLYMER BULLETIN, cilt.71, ss.2903-2921, 2014 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 71 Konu: 11
  • Basım Tarihi: 2014
  • Doi Numarası: 10.1007/s00289-014-1230-2
  • Dergi Adı: POLYMER BULLETIN
  • Sayfa Sayıları: ss.2903-2921

Özet

Water-soluble maleic anhydride-containing poly[maleic anhydride-alt-acrylic acid] (poly(MA-alt-AA) or MAAA) copolymer was synthesized by freer-adical chain polymerization reaction, in 1,4-dioxane in the presence of benzoyl peroxide, 0.1 %, as the radical initiator at 70 degrees C under a nitrogen atmosphere. The purified copolymer was then modified with an anti-external fungal and anti-cancer active agent, acriflavine (AF). The modification reaction was performed 48 h at 70 degrees C in dimethylformamide organic media, using triethylamine (TEA or Et3N) as the catalyst. The modified or conjugated copolymer/drug couple was named as MAAA/AF. Detailed structural characterization of the copolymer (MAAA) and modified product (MAAA/AF) was carried out by Fourier Transform Infrared (FTIR) and Nuclear Magnetic Resonance (H-1-NMR and C-13-NMR). The obtained FTIR, H-1-NMR, and C-13-NMR spectra confirmed that AF was successfully bound to the MAAA copolymer backbone by ring-opening reaction. Antimicrobial susceptibility of the MAAA, AF, and MAAA/AF was evaluated by Kirby Bauer Disc Diffusion method on Mueller-Hinton Agar using Enterecoccus faecium, Enterohaemorrhagic Escherichia coli (EHEC), Staphylococcus aureus and Listeria monocytogenes. Results obtained indicated that MAAA/AF had antibacterial activity on EHEC and S. aureus at 50, 40, and 30 mu g. A mechanism for MAAA and AF was then also suggested for the conjugation reaction.