Phyto-mediated Synthesis of Silver Nanoparticles with Afrohybanthus travancoricus Leaf Aqueous Extract and Screening of their in vitro Antioxidant, Anti-Inflammatory, and Anti-diabetic Activities

Aim: There are many uses for silver nanoparticles in the field of biomedicine due to their exceptional properties. A major application of silver nanoparticles is the increase of antibiotics that are clinically helpful against microbes and drug-resistant bacteria. However, environmentally friendly methods for their synthesis must be developed. Objectives: Current study, the major objective of this research is concentrated on to suggest an easy and well-organized biosynthesis of silver nanoparticles by confirmed antioxidant, anti-inflammatory and anti-diabetic activities. The ATSNPs (Afrohybanthus travancoricus silver nanoparticles) was biosynthesized with A. travancoricus plant like capping and reducing agent. Materials and Methods: The ATSNPs aqueous extract were mixed by water extract of 1mM AgNO₃ solution led to appearance of greenish brown to dark brown colour indicates the synthesis of SNPs. The silver nanoparticles were characterized by UV-visible spectroscopy, FT-IR, SEM, XRD, and EDX analysis. Antioxidant assay was tested through DPPH and ABTS+ assays, anti-inflammatory assay through albumin denaturation and antidiabetic assay by α-amylase and α-glucosidase activities. Results: A colour change of solution from dark brown to light brown, absorption peak of ATSNPs as 290 to 300 nm in UV-vis spectroscopy. ATSNPs showed 6 intense peaks in FTIR analysis and functional groups like phenols, alcohols, 1° amines, alkynes, aliphatic amines, aromatics, and alkyl halides were identified. In XRD analysis showed 5 intense peaks at 20.8°, 30.3°, 40.1°, 40.9°, 60°. The EDX analysis the presence of Ag at 3 kev and SEM analysis showed the size of ATSNPs ranges between 88 μm – 242 μm. Antioxidant activity was observed the dose dependent manner in both assays. Anti-inflammatory activity of ATSNPs proved maximum inhibition through egg albumin denaturation. Antidiabetic activity exhibits maximum inhibition percentage of α-amylase and α- glucosidase at 10 μg/mL. The lowest IC₅₀ value was noted in α amylase (170 μg/mL) and α glucosidase (134 μg/mL). Conclusion: The obtained results recommended that using ATSNPs, it is likely to represented silver nanoparticles with controlled characteristics and important pharmacological activities.