MATERIALS AND METHODS: Red tea and clove-mediated ZnO NPs were synthesized using the green synthesis method. The anti-microbial activity was tested against oral pathogens using the agar well diffusion method, while the anti-diabetic activity was estimated using the alpha-amylase inhibitory assay method by using red tea and clovemediated ZnO NPs.
RESULTS: ZnO NPs were successfully synthesized using red tea and clove-formulated extract. The synthesized ZnO NPs using Aspalathus linearis (red tea) and Syzygium aromaticum (clove) mediated ZnO NPs were characterized using UV visible spectrophotometry and SEM (Scanning Electron Microscope) analysis. The green synthesized ZnO NPs show promising anti-microbial activity by exhibiting a 12 mm zone of inhibition against S. aureus, 11 mm in E. faecalis, 9 mm in S. mutans, and 11 mm in C. albicans. In anti-diabetic activity, the green synthesized ZnO NPs showed a maximum inhibition percentage of up to 80% at the maximum concentration of 50 µg/mL.
CONCLUSION: Green synthesized ZnO NPs using red tea and clove showed maximum efficacy in anti-microbial properties which can lead to huge potential use as antibacterial agents. Simultaneously, anti-diabetic activity showed an excellent inhibition percentage which can be a potent therapeutic agent in the field of nanomedicine in diabetes management.
METHODS: We conducted this scoping review to collect evidence related to the antimicrobial potential of diverse natural compounds from Zingiberaceae plants and their synthetic derivatives. We followed the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) Extension for Scoping Reviews guidelines. The literature search was conducted using PubMed, Web of Science and Scopus electronic databases for relevant studies published from 2012 to 2023. A total of 28 scientific studies fulfilled the inclusion criteria. The authors of these studies implemented in vitro and in silico methods to examine the antimicrobial potency and underlying mechanisms of the investigated compounds.
RESULT: The evidence elucidates the antimicrobial activity of natural secondary metabolites from Zingiberaceae species and their synthetic derivatives against a broad panel of gram-positive and gram-negative bacteria, fungi and viruses.
CONCLUSION: To date, researchers have proposed the application of bioactive compounds derived from Zingiberaceae plants and their synthetic analogues as antimicrobial agents. Nevertheless, more investigations are required to ascertain their efficacy and to broaden their commercial applicability.
OBJECTIVE: The mechanisms of bacterial resistance are described in this review and this is followed by an outline of the features and uses of metallic NPs as antibiotic agents to address bacteria that are antibiotic- sensitive and resistant. Additionally, a general impression of metallic NPs as antibiofilm bactericidal agents is presented.
CONCLUSION: Biofilms and bacterial strains that are resistant to antibiotics present a grave public health challenge and this has enhanced the need to develop new bactericidal agents. Therefore, nanomaterials are considered as a potential platform for managing bacterial infections.