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To achieve our goal we incorporated antimicrobial peptides (AMPs) into our medical dressing. AMPs, are stable peptide that have extensive ability in bactericidal effects. Unlike antibiotics, AMPs can puncture the cell membrane to kill the bacteria therefore bypassing bacterial antibiotic drug resistance mechanisms. [1] Besides, the peptides also have ability to help skin recovered. [2]After reading numerous of research articles, we selected two kinds of AMPs: Signiferin and Epinecidin-1 as our reagents.
Signiferin is a peptide came from the skin mucus of Crinia signifera. It demonstrated effectiveness in killing Methicillin-Resistant Staphylococcus aureus (MRSA), and had been kindly proved by the TU-Delft 2013 iGEM team. Epinecidin-1 is a peptide came from the skin mucus of Epinephelus coioides. It has ability to help wound healing and has been proven by animal studies, and was selected as an additional reagent. [3]Combining these two properties, we believe that can alleviate the serious problem of skin injury.
To control the AMPs expression and secretion, the Lac operon was used and treated signal peptide in our system. Helping peptides secret into culture medium.[4][5] After purification of the peptide we will be testing the effectiveness of our synthetic AMPs. We will test macro-dilution of MRSA and in vitro wound healing assay for epithelial cells line (HaCaT) and micro vascular endothelial cells (HMEC-1). After in vitro test we will do in vivo test in mice to see its effectiveness on the wound. Out goal is to create a wound dressing that is effective in inhibiting bacterial growth and assisting wound healing process.
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