Macromolecular Research, Vol.26, No.7, 581-591, July, 2018
In vivo Acute Cytotoxicity Study of Poly(2-amino ethyl methacrylate-co-methylene bis-acrylamide) Magnetic Composite Synthesized in Supercritical CO2
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With magnetic ferrite nanoparticles (FNPs) gaining interest in biotechnological fields and methacrylates being used as synthetic polymer for therapeutics loading and conjugation, we attempt to make novel magnetic composite by supercritical CO2 assisted entrapment of FNPs into in situ synthesized polymeric mesh of 2-amino ethyl methacrylate (AEMA) cross linked with methylene bis-acrylamide (MBA) at90±1 oC and pressure of 1200 psivia 2,2-azobisisobutyronitrile (AIBN) initiated radical polymerization. Particle thus obtained was characterized by using proton nuclear magnetic resonance (1H NMR), X-ray diffraction (XRD), thermal gravimetric-derivative thermogravimetric-differential thermal analysis (TG-DTGDTA), atomic force microscopy (AFM), and vibrating sample magnetometer (VSM). 1H NMR of Copolymer (without FNPs embedded) demonstrated distinct peaks verifying AEMA moieties flanked by MBA moieties with free amino group. Though the particle showed less saturation magnetization than that of as synthesized FNPs, it still maintained similar magnetic profile. AFM results showed average grain size of polymeric magnetic composites (PMCs) to be 80 nm with less agglomeration. TGA results verify the thermal stability of the compound upto 200 oC. In vivo acute cytotoxicity was profiled by administrating four different concentrations of FNPs, Copolymer and PMCs (FNPs embedded) into Sprague Dawley albino rat intraperitonally for 14 days and measuring various hematological, biochemical and serum enzymatic parameters along with histological examinations. Overall, PMCs showed no significance change in these parameters compared to normal saline administered control which signifies biocompatible nature of the composite. Hence, clean synthesis of FNPs embedded biocompatible amino functional magnetic composite has been achieved which holds potential in number of applications like drug loading, enzyme immobilizations, targeted therapy, etc.
Keywords:poly(AEMA-co-MBA);magnetic composites;supercritical CO2;in situ polymerization;in vivo cytotoxicity
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