Biocompatibility Of Nanocomposite Research Articles

Synergistic effects of thermally reduced graphene oxide/zinc oxide composite material on microbial infection for wound healing applications

Infections originating from pathogenic microorganisms can significantly impede the natural wound-healing process. To address this obstacle, innovative bio-active nanomaterials have been developed to enhance antibacterial capabilities. This study focuses on the preparation of nanocomposites from thermally reduced graphene oxide and zinc oxide (TRGO/ZnO). The hydrothermal method was employed to synthesize these nanocomposites, and their physicochemical properties were comprehensively characterized using X-ray diffraction analysis (XRD), High-resolution transmission electron microscopy (HR-TEM), Fourier-transform infrared (FT-IR), Raman spectroscopy, UV-vis, and field-emission scanning electron microscopy (FE-SEM) techniques. Subsequently, the potential of TRGO/ZnO nanocomposites as bio-active materials against wound infection-causing bacteria, including Staphylococcus aureus, Pseudomonas aeruginosa, and Escherichia coli, was evaluated. Furthermore, the investigated samples show disrupted bacterial biofilm formation. A reactive oxygen species (ROS) assay was conducted to investigate the mechanism of nanocomposite inhibition against bacteria and for further in-vivo determination of antimicrobial activity. The MTT assay was performed to ensure the safety and biocompatibility of nanocomposite. The results suggest that TRGO/ZnO nanocomposites have the potential to serve as effective bio-active nanomaterials for combating pathogenic microorganisms present in wounds.

Synthesis of drug conjugated magnetic nanocomposite with enhanced hypoglycemic effects

In the present study, a magnetic nanocomposite (magnetite Fe3O4 and hematite Fe2O3) has been successfully synthesized by the sol-gel method and coated with polyvinyl alcohol (PVA) followed by conjugation of anti-diabetic drug metformin. Detailed structural and microstructural characterization of the nanocomposite (NP) and drug conjugated nanocomposite (NP-DC) are analyzed by the Rietveld refinement of respective XRD patterns, FTIR analysis, UV–Vis spectroscopy, SEM and TEM results. SEM and TEM image analyses reveal the spherical morphology and average size of NP, PVA coated nanoparticles (NP-PVA) and NP-DC samples, indicating a suitable size to be a nanocarrier. The biocompatibility of NP and NP-DC was carried out in NIH/3T3 and J774A. 1 cells. The enhanced activity of the drug, when conjugated with nanocomposite, is confirmed after the treatment of both the pure drug and NP-DC sample on the 18 h fasted normoglycemic and hyperglycemic mice. The blood glucose level of the mice is effectively decreased with the same concentration of the pure drug and NP-DC sample. It proves the increased activity of the NP-DC sample, as only 5 wt% drug is present that shows the same efficiency as the pure drug. This study suggests excellent biocompatibility and cytocompatibility of NP and NP-DC besides the critical property as a hypoglycemic agent. It is the first time approach of conjugating metformin with a magnetic nanocomposite for a significant increment of its hypoglycemic activity, which is very important to reduce the side effect of metformin for its prolonged use.

Insecticidal fungal metabolites fabricated chitosan nanocomposite (IM-CNC) preparation for the enhanced larvicidal activity - An effective strategy for green pesticide against economic important insect pests

In the present study, enhanced pesticidal activity and biocompatibility of chitosan nanocomposite prepared with biocompatible polymer chitosan - insecticidal metabolites derived from potential fungal biopesticidal agent Nomuraea rileyi were studied. Insecticidal metabolites were isolated from the culture filtrate of fungal strain grown in sabouraud maltose yeast extract broth (SMYB) and the collected filtrate was extracted with ethyl acetate followed by purification using G-60 silica gel column. Chitosan nanocomposite was prepared with metabolites thus acquired by ionic gelation method. Synthesized nanocomposite was found to have high stability, uniformly dispersed particles with high loading and entrapment efficiency. Insecticidal activity was studied by determination of cumulative mortality against larval instars of Spodoptera litura and changes in biochemical composition of midgut, hemolymph macromolecules which revealed that the nanocomposite was effective against all the larval stages in terms of high mortality, drastic reduction of midgut and hemolymph macromolecules biochemical composition. Biocompatibility of nanocomposite was carried out by evaluation of developmental toxicity against zebrafish and in vitro hemolysis with peripheral blood cells. Chitosan nanocomposite treatment was not induced any toxic effect on the developmental stages of zebra fish. Hemolysis was also not recorded in the nanocomposite treatment. The observed results imply that insecticidal metabolites fabricated chitosan nanocomposite prepared in our present system is a promising candidates for pest control against economically important insect pests without affecting non-target organisms.

Keratin-chitosan/n-ZnO nanocomposite hydrogel for antimicrobial treatment of burn wound healing: Characterization and biomedical application

In the Present-day medicinally applied wound bandages have many drawbacks for, instance, rigidity, non-porosity, low mechanical potency, also an affinity for bandages to stick onto the injury exterior; additionally, a greater part of the bandages did not secure bactericidal activity. Hydrogel derived injury bandages would be supportive to afford a chill feeling with a humidity atmosphere, in addition, to performing as an obstruction to bacteria. To overcome these drawbacks, we have fabricated porous keratin-chitosan/n-ZnO nanocomposite (KCBZNs) bandages via the inclusion of nano-ZnO into the keratin-chitosan hydrogel. The functional group and surface of as-fabricated bandages were characterized using Fourier transform infrared spectroscopy (FT-IR), X-ray diffractometry (XRD), and scanning electron microscopy with energy-dispersive X-ray spectroscopy (SEM-EDX) and transmission electron microscopy with selected area diffraction (TEM-SAD). Moreover, mechanical, swelling, bactericidal, bio-compatibility of nanocomposite was assessed to exhibit its efficacy for biological applications. The nanocomposite illustrated increased swelling, and bactericidal activity. Bio-compatibility of the nanocomposite has been investigated in normal human fibroblast cells. Also, the in vivo assessments in SD rats exposed that as-fabricated nanocomposite bandages increased the wound curing with assisted for quicker skin cell construction along with collagen development. Hence, the acquired information strongly supports to utilize of this nanocomposite hydrogels for burn wounds.

Biocompatible nanocomposites prepared by impregnating bacterial cellulose nanofibrils into poly(3-hydroxybutyrate)

Bio-nanocomposite was prepared by impregnation of bacterial cellulose into the poly(3-hydroxybutyrate) (PHB). The morphology was examined by field emission scanning electron microscopy, which showed the well-dispersed bacterial cellulose nanofibrils in PHB. The changes in the crystallinity of PHB caused by incorporating the bacterial cellulose were investigated by X-ray diffraction. The result indicates that the bacterial cellulose nanofibrils probably help the PHB molecules to crystallize. An increase in the mechanical properties was observed by impregnating bacterial cellulose as reinforcement into the PHB matrix. The biocompatibility of nanocomposite was preliminarily evaluated by cell-adhesion studies using Chinese Hamster Lung (CHL) fibroblast cells. The cells incubated with nanocomposite scaffold for 48 h were capable of forming cell adhesion and proliferation, which shows much better biocompatibility than pure PHB.