Good news! Could this be a breakthrough regarding antibiotics?
"Researchers say graphene oxide targets and destroys bacteria, including drug-resistant strains, by binding to a molecule absent in human cells, offering a durable alternative to antibiotics."
"Scientists have uncovered how graphene oxide pulls off a remarkable trick: it hunts down and destroys harmful bacteria while leaving human cells completely unharmed. By targeting a molecule found only in bacterial membranes, this ultra-thin carbon-based material acts with laser-like precision—offering a powerful new alternative to traditional antibiotics. Even more exciting, it works against drug-resistant “superbugs,” promotes faster wound healing, and keeps its antibacterial strength even after repeated washing."
"... a joint research team ... has identified the mechanism by which Graphene Oxide (GO) exhibits powerful antibacterial effects against bacteria while remaining harmless to human cells. ...
This study is highly significant as it provides molecular-level proof of graphene's antibacterial action, which had not been clearly understood until now.
The research team confirmed that graphene oxide performs "selective antibacterial action" by attaching to and destroying only the membranes of bacteria ... while leaving human cells untouched. This occurs because the oxygen functional groups on the surface of graphene oxide selectively bind with a specific component (POPG) found only in bacterial cell membranes. ..."
From the abstract:
"Graphene oxide (GO) has attracted research attention as a promising biomedical material principally owing to its biocompatibility as well as excellent antibacterial properties, although the exact mechanism for the apparently conflicting both activities remains controversial yet.
We present controlled physicochemical and biomimetic features of GO that exert antibacterial effects via selective destabilization of the bacterial membrane.
Our model cell study, exploiting artificial vesicular phospholipid assembly along with spectroscopic analyses, finds that surface oxygen functionalities of GO determine antibacterial activity by highly specific interaction with POPG, a phospholipid selectively present in membranes of various bacterial species, including drug-resistant bacteria.
Furthermore, GO-incorporated nanofibers were evaluated in infected wound models in mice and pigs, where they effectively suppressed bacterial growth and accelerated wound healing with minimal inflammation.
These findings highlight the potential use of GO as a safe and sustainable antibacterial to avoid repeated overuse of conventional antibiotics."
KAIST Researchers Unveil Technical Principles Behind Antibacterial Graphene Toothbrushes with 10 Million Units Sold (original news release)
Biocompatible but Antibacterial Mechanism of Graphene Oxide for Sustainable Antibiotics (open access)
Schematic diagram of the selective interaction between graphene oxide and cell membranes
Identification of selective interaction mechanisms at the molecular level through microscopic and chemical analysis of artificial lipid vesicles mimicking cell membranes
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