Catnip-Silver Nanoparticles Show Superior Wound-Healing in Live Tissue Studies

Jim Crocker
13th June, 2024

Catnip-Silver Nanoparticles Show Superior Wound-Healing in Live Tissue Studies

Catnip (Nepeta cataria)

Photographer: Dan Wilder

Key Findings

  • Researchers at Burdur Mehmet Akif Ersoy University successfully synthesized silver nanoparticles (Nc-AgNPs) using Nepeta cataria (catnip) plant extract
  • The Nc-AgNPs showed strong antibacterial properties, effectively inhibiting the growth of various bacterial strains, including E. coli, E. faecalis, and S. aureus
  • In wound-healing tests on rats, the Nc-AgNPs combined with Vaseline significantly accelerated wound closure, achieving a 94% closure rate in 10 days, comparable to commercial treatments
Silver nanoparticles (AgNPs) have gained significant attention in recent years due to their potential applications in medicine, particularly in antimicrobial and wound-healing treatments. A recent study conducted by Burdur Mehmet Akif Ersoy University has explored the biosynthesis of silver nanoparticles using Nepeta cataria (catnip) plant extract and evaluated their properties and effectiveness in various applications[1]. The researchers synthesized silver nanoparticles (Nc-AgNPs) using the extract of Nepeta cataria, a plant known for its medicinal properties. The biosynthesis process was confirmed by observing a strong absorbance peak at a wavelength of 438 nm using a UV-vis spectrophotometer. This indicates the successful formation of Nc-AgNPs. Further analysis using Scanning Electron Microscopy (SEM) and Transmission Electron Microscopy (TEM) revealed that the nanoparticles had a spherical shape, with an average crystallite size of 15.74 nm as determined by X-ray Diffraction (XRD) analysis. The Energy Dispersive Spectroscopy (EDS) spectrum showed a dominant emission energy at 3 keV, characteristic of silver nanoparticles. The antimicrobial properties of Nc-AgNPs were tested against various bacterial strains. The nanoparticles exhibited inhibition zones of 12 nm against gram-negative Escherichia coli, 10 nm against gram-positive Enterococcus faecalis, and 11 nm against Staphylococcus aureus. These results suggest that Nc-AgNPs have strong antibacterial properties, making them potential candidates for treating bacterial infections. Nanoparticles have previously been shown to offer advantages in medical applications due to their ability to form stable interactions with ligands, variability in size and shape, and high carrier capacity[2]. This study builds on these findings by demonstrating the effectiveness of biosynthesized Nc-AgNPs in antimicrobial applications. In addition to their antibacterial properties, the Nc-AgNPs also exhibited high antioxidant activity, with a 63% activity at a concentration of 5000 μg/mL. Antioxidants are crucial in protecting cells from oxidative damage, which is a common issue in wound healing and other medical conditions. The wound-healing properties of Nc-AgNPs were evaluated in vivo using wound models created on Wistar albino male rats. The rats were divided into four groups, and different treatments were applied. After 10 days, the group treated with Nc-AgNPs combined with Vaseline (Group IV) showed the highest wound closure rate at 94%, comparable to the commercial product Silverdin®. Histopathological examination revealed an increase in mature Type 1 collagen in Group IV and the positive control group (Group II), with better collagen maturation compared to the vehicle control group (Group III) and the negative control group (Group I). Immunohistochemical analysis showed complete epithelialization in Group IV and Group II, with distinct cytokeratin expressions, while Group III exhibited mild expressions. The findings of this study align with previous research indicating the potential of nanoparticles in medical applications, particularly in wound healing and antimicrobial treatments[3][4]. The use of a natural plant extract for the biosynthesis of nanoparticles offers an eco-friendly and cost-effective alternative to traditional chemical methods. Moreover, the incorporation of natural cell membranes onto nanoparticles has been shown to enhance their biointerfacing capabilities, further expanding their potential applications[3]. Despite the promising results, it is essential to address the potential toxicity and safety concerns associated with nanoparticle use in biological systems. Previous studies have highlighted the need for thorough evaluation of nanoparticle interactions with mammalian cells to minimize toxicity and ensure safe application[4]. Continued research in this area will be crucial to fully understand and mitigate any adverse effects. In summary, the study conducted by Burdur Mehmet Akif Ersoy University demonstrates the successful biosynthesis of silver nanoparticles using Nepeta cataria plant extract and their potential applications in antimicrobial and wound-healing treatments. The findings build on previous research and highlight the importance of further studies to explore the full potential and safety of nanoparticles in medical applications.

MedicineBiochemAnimal Science

References

Main Study

1) Superior In Vivo Wound-Healing Activity of Biosynthesized Silver Nanoparticles with Nepeta cataria (Catnip) on Excision Wound Model in Rat

Published 12th June, 2024

https://doi.org/10.1007/s12011-024-04268-4

Related Studies

2) Therapeutic Nanoparticles and Their Targeted Delivery Applications.

https://doi.org/10.3390/molecules25092193

3) Cell Membrane Coating Nanotechnology.

https://doi.org/10.1002/adma.201706759

4) Safe Nanoparticles: Are We There Yet?

https://doi.org/10.3390/ijms22010385


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