Silk Biowaste Protein Mediated Silver Nanoparticles Synthesis and Analysis of Anti-Inflammatory, Wound Healing, Antidiabetic, Antioxidant, Tyrosinase Inhibition, and Antibacterial Mechanism of Action.

BACKGROUND

Silk, a natural biowaste protein from silkworm cocoons called sericin, has promising properties as a biomaterial for several biomedical applications, owing to its excellent biocompatibility, biodegradability, hydrophilicity, and reactivity.

PURPOSE

The synthesis of AgNPs using these biowaste protein materials is more efficient, environmentally friendly, and cost-effective.

METHODS

In this study, a novel approach was developed to synthesize silver nanoparticles (Scn-AgNPs) using sericin as a reducing agent and to study their anti-inflammatory, wound healing, antidiabetic, antioxidant, tyrosinase inhibitory, and antibacterial mechanisms of action.

RESULTS

The initial production of Scn-AgNPs was established by a visual color change to brown, followed by UV-visible spectroscopy, which showed a solid absorption band at 422 nm due to surface plasmon resonance. The mean particle size 82.77 nm with a polydispersity index of 0.387, and -30.8 mV zeta potential specifies the strong stability of the nanoparticles. Scn-AgNPs demonstrated promising wound healing potential, with around 67.72% of wound closure rate at 25 µg/mL concentration. Besides, It also displayed significant anti-inflammatory, antioxidant (in terms of DPPH (75.48%), ABTS (95.04%), SOD (73.92%) potential), antidiabetic properties (95.32% of α-amylase inhibition and 94.42% of α-glucosidase inhibition), and tyrosinase inhibition (27.07%) potentials. Furthermore, the Scn-AgNPs also exhibited significant antibacterial potential with the inhibition zones diameter ranging from 13.84 to 16.90 mm against all the three tested bacteria.

CONCLUSION

The results indicated that Scn-AgNPs could be a potential candidate for various applications, including cosmetics for preparing antioxidant rich gels and nano formulations, in the biomedical field as a component of wound dressing, antibacterial dressing, drug carriers and drug delivery systems, and in environmental sectors as antibacterial agents, food packaging, food additives and in vitro/in vivo monitoring. This study highlights the use of sericin bio-waste materials into valuable resources, endorsing sustainability and enhancing the commercial value of silk-based bio-waste materials.