New boron-containing graft copolymers and their poly ethylene imine PEI macrocomplexes were synthesized byamidolysis of poly N-isopropylacrylamide-co-maleic anhydride s [poly NIPA-co-MA s] with ethanolamine ester ofdiphenylboronic acid EAPB , and following complexation of graft copolymers with poly ethylene imine PEI ,respectively. The structure, compositions and properties stimuli-responsive, polyelectrolyte and thermal behavior ofsynthesized copolymers were characterized by FTIR,1H {13C} NMR and UV spectroscopy, viscometry, DSC and TGAanalyses. It was shown that under given conditions pH, temperature and grafting degree , these H-bondingmacrocomplexes with hydrophobic diphenylborate side chain groups in aqueous solutions undergo a reversiblecooperative conformational transition which is provided a promising possibility of adjusting the hydophobic–hydrophilicbalance in the studied graft copolymer systems. Fluorescence measurements indicated that poly[ NIPA-co-MA -gEAPB]/PEI macrocomplex easily transferred to the HELA tumor cells, and showed low cytotoxicity against a normalcell line. Obtained results, especially stimuli-responsive and very high transferable behavior allow use these boroncontaining graft copolymer systems as non-viral vectors in gene- and bioengineering processes and drug deliverysystems, as well as in boron neutron capture therapy
boron-containing graft copolymers poly ethylene imine stimuli-responsivity DNA conjugates
Birincil Dil | İngilizce |
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Bölüm | Research Article |
Yazarlar | |
Yayımlanma Tarihi | 1 Nisan 2008 |
Yayımlandığı Sayı | Yıl 2008 Cilt: 36 Sayı: 2 |
HACETTEPE JOURNAL OF BIOLOGY AND CHEMİSTRY
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