The application of graphene-based materials in medicine has led to significant technological breakthroughs. The remarkable properties of these carbon materials and their potential for functionalization with various molecules and compounds make them highly attractive for numerous medical applications. To enhance their functionality and applicability, extensive research has been conducted on surface modification of graphene (GN) and its derivatives, including modifications with antimicrobials, metals, polymers, and natural compounds.
Graphene Material | Biomedical Application | Biocompatibility | Microorganism | Main Conclusions | Ref. |
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Doxycycline (Dox)-graphene oxide (GO) immobilized on titanium (TiO2) | Medical devices | Dox-GO/TiO2 did not affect the viability of human fibroblasts (over 80% cell viability). | Escherichia coli Staphylococcus aureus |
Dox-GO/TiO2 reduced the viability of adhered bacteria by over 90%, whereas the GO/TiO2 surface inactivated adhered bacteria by 40%. | [48] |
Antimicrobial peptide (CATH-2)–reduced graphene oxide (rGO) | Medical devices | Functionalized rGO induced low cytotoxicity towards erythrocytes in comparison to rGO alone. | E. coli | Peptide-functionalized rGO exhibited higher antimicrobial activity compared to rGO (13.3- and 21.8-mm inhibition halo). | [49] |
Antimicrobial peptide (ponericin G1)/growth factor (bFGF)/poly(lactide-co-glycolide (PLGA)-GO composite | Wound healing | Produced composite increased cell proliferation compared to PLGA (p < 0.05). | E. coli S. aureus |
Ponericin G1/PLGA-GO reduced bacteria growth compared to PLGA or PLGA-GO composite (p < 0.05). | [8] |
Antimicrobial peptide (OH30)/polyethylene glycol (PEG)-GO | Wound healing | OH30/PEG-GO had high cell viability (over 80%) and low toxicity. | S. aureus | In vitro data demonstrated that OH30 released by the synthesized composite inhibited S. aureus growth by up to 95% after 3 h. In vivo data indicated that, on day 7, the number of S. aureus in wounds containing the composite was 6 times less than OH30 or PEG-GO (p < 0.05). | [50] * |
N-halamine-GO fibrous membrane | NS | NP | E. coli | Synthesized composite exhibited high biocidal activity against E. coli (>90%). | [36] |
Graphene Material | Biomedical Application | Biocompatibility | Microorganism | Main Conclusions | Ref. |
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Silver nanoparticles (AgNPs)-reduced graphene oxide (rGO) | Medical textiles | NP | Escherichia coli | AgNPs-rGO composites exhibited enhanced activity against E. coli (100% inactivation) compared to rGO (82.5% inactivation). | [57] |
AgNPs-graphene oxide (GO) | NE | The viability of human cells was not changed when incubated on nanoplatforms coated with AgNPs-GO. | Salmonella enteritidis | AgNPs-GO nanoplatform significantly inhibited S. enteritidis growth (over 50% cell inactivation). | [55] |
AgNPs-rGO immobilized into polyurethane/cellulose acetate matrix | Wound healing | In vivo data demonstrated that AgNPs-rGO-based film significantly promoted the wound healing process. | Pseudomonas aeruginosa Staphylococcus aureus |
The produced film exhibited an inactivation rate of 100% for Gram-negative bacteria and 95% against Gram-positive bacteria. | [58] * |
AgNPs-GO deposited on nickel-titanium alloy | Medical devices | NP | Streptococcus mutans | AgNPs-GO reduced the number of S. mutans viable cells by up to 5 Log. | [56] |
Gold (Au)-decorated amine-functionalized graphene oxide (NH2-GO) | Implant devices | Au-NH2-GO did not affect the viability of human cells (approximately 100% viability). | Bacillus subtilis E. coli P. aeruginosa S. aureus |
The synthesized material exhibited a higher (5-fold more) antibacterial activity against Gram-positive and Gram-negative bacteria than bare Au or NH2-GO material. | [59] |
Copper oxide (CuO)-GO nanohybrids into bacterial cellulose (BC) matrix | NS | CuO-GO/BC film exhibited excellent biocompatibility towards fibroblast cells (>100%). | B. subtilis E. coli P. aeruginosa S. aureus |
After 3 h, CuO-GO/BC films completely inactivated Gram-positive bacteria while only reducing the viability of Gram-negative bacteria by 20%. | [52] |
CuO-rGO | NS | NP | P. aeruginosa | CuO-rGO composites led to complete bacterial inactivation (7 Log reduction). | [53] |
Copper nanoparticles (CuNPs)-graphene (GN) supported on silicon (Si) wafers | NS | CuNPs-GN/Si showed slight toxicity for human cells (15% reduction in cell viability). | E. coli S. aureus |
In the presence of CuNPs-GN/Si films, S. aureus growth was completely inhibited, and E. coli viability was reduced by 87%. | [54] |
Palladium (Pd)/polypyrrole (PPy)-rGO composite | Tissue engineering | Pd/PPy-rGO (<100 µg/mL) did not substantially affect osteoblast viability (>80%). | B. subtilis E. coli Klebsiella pneumoniae P. aeruginosa |
Pd/PPy-rGO nanocomposite significantly inhibited the biofilm formation of B. subtilis (72%), E. coli (90%), K. pneumoniae (89%), and P. aeruginosa (83%). | [60] |
Cerium oxide (CeO2)-GO | Wound healing | NP | E. coli P. aeruginosa S. aureus Salmonella typhi |
CeO2-GO nanocomposite inhibited E. coli, P. aeruginosa, S. aureus, and S. typhi biofilms by 38, 40, 31, and 35%, respectively. | [61] |
Graphene Material | Biomedical Application | Biocompatibility | Microorganism | Main Conclusions | Ref. |
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Non-natural polymers | |||||
Polyoxyalkyleneamine (POAA)-graphene oxide (GO) | Surface coatings | NP | Bacillus subtilis Escherichia coli |
After 3 h, bacteria exposed to POAA-GO decreased their viability to at least 75%. | [67] |
Poly(ε-caprolactone) (PCL)-GO | Tissue engineering | Human fibroblasts kept their culturability and proliferation for up to 14 days. | E. coli Staphylococcus epidermidis |
PCL-GO composites inactivated S. epidermidis and E. coli adhered cells by 80% after 24 h. | [68] |
PCL-graphene (GN) | Nasal implants | NP | E. coli Staphylococcus aureus |
The efficacy of PCL-GN against S. aureus was about 90%. In contrast, this composite did not exhibit activity against E. coli. | [64] |
Epoxy-rich-GO (er-GO) | Wound dressing | Human cells exposed to er-GO exhibited viability ratios greater than 100%. | E. coli S. aureus |
er-GO composite decreased in vitro E. coli and S. aureus viability by up to 57 and 97%, respectively. In vivo data indicated that E. coli and S. aureus viability was reduced by 47 and 68%, respectively, in presence of er-GO. | [69] * |
Poly(Lactic-co-Glycolic Acid) (PLGA)-graphene nanoplatelets (GNP) | NE | NP | E. coli | At 15 MHz, PLGA-GNP composites reduced E. coli viability by 33%, while at lower frequencies (10 and 5 MHz), these films decreased bacteria viability by up to 60%. | [9] |
Polydimethylsiloxane (PDMS)-GNP | Implantable medical devices | NP | Pseudomonas aeruginosa S. aureus |
The PDMS-GNP reduced the number of total (57%), viable (69%), culturable (55%), and VBNC cells (85%) of S. aureus biofilms. A decrease of 25% in total cells and about 52% in viable, culturable, and VBNC cells was observed for P. aeruginosa biofilms. | [66] |
Natural polymers | |||||
Chitosan (CS)-graphene oxide (GO) | Surface coatings | NP | B. subtilis E. coli |
After 3 h, bacteria exposed to CS-GO composite decreased their viability to less than 10%. | [67] |
CS/poly(vinyl alcohol) (PVA)-GO nanocomposites | Tissue engineering | After 30 days of film implantation, the absence of injuries in the intervened areas with normal healing was observed. | Bacillus cereus S. aureus E. coli Salmonella spp. |
Biocomposites containing 0.75 and 1 wt.% GO completely inhibited pathogen growth. | [70] * |
CS/PVA-GO | Wound healing | CS/PVA-GO hydrogels showed nontoxicity towards pre-osteoblast cells (>70% cell viability). | E. coli S. aureus |
Hydrogels exhibited high antimicrobial activity against E. coli and S. aureus (up to 35 and 32 mm inhibition halo, respectively). | [10] |
CS/polyethylene glycol (PEG)-decorated GO biocomposite | Wound healing | Cell survival on CS/PEG-GO was 95.4%. | E. coli S. aureus |
CS, 1 wt% CS/GO and 1 wt% CS/PEG-GO were able to inactivate S. aureus by 80, 85, and 100% and E. coli by 65, 85, and 95%, respectively. | [42] |
Carboxymethyl Chitosan (CC)-GO-based Sponge | Wound healing | CC/L-cysteine-GO sponge showed a high cell viability rate, as demonstrated by Live/Dead staining. | E. coli S. aureus |
In vivo data indicated that the CC/L-cysteine-GO sponge had a faster wound-healing rate than CC/GO. In vitro tests revealed that the addition of L-cysteine-GO and GO to CC increased sponges’ antimicrobial activity. | [43] * |
Folic acid (FA)/silk fibroin (SF)-GO | Wound healing Tissue engineering |
The viability of fibroblast cells exposed to FA/SF-GO for 24 h was 97%. | P. aeruginosa | After 24 h, FA/SF-GO film reduced biofilm formation by 80% compared to control (polystyrene). | [73] |
Graphene Material | Biomedical Application | Biocompatibility | Microorganism | Main Conclusions | Ref. |
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Hydroxyapatite/Vivianite-GO | NS | Cell viability of osteoblasts in the presence of this composite was 98%. | E. coli S. aureus |
Composite exhibited activity against E. coli and S. aureus after 24 h (14.5 and 13.4 mm inhibition halo, respectively). | [74] |
Usnic acid (UA)-GN | Medical devices | NP | S. aureus Staphylococcus epidermidis |
After 24 h, UA-GN inhibited S. aureus and S. epidermidis biofilms by 3 Log at 25, 50, 100, and 200 µg/mL AU/GO compared to GN films and glass, except for S. aureus growing on 25 µg/mL AU-GN. After 96 h, staphylococcal biofilms were reduced by 5 Log compared to the control (glass). | [75] |
Quercetin-GO | Drug delivery systems | GO-based materials showed a biocompatible behavior at lower concentrations (>70% cell viability). | E. coli S. aureus |
Quercetin/GO composites reduced S. aureus culturability by 1 Log and E. coli culturability by 5 Log. | [76] |
Juglone-GO | Drug delivery systems | Materials showed a biocompatible behavior at lower concentrations (>70% cell viability). | E. coli S. aureus |
Juglone/GO composites reduced S. aureus culturability by 3 Log and E. coli culturability by 5 Log. | [76] |
This entry is adapted from the peer-reviewed paper 10.3390/biom13111571