Affinity-driven functionalization of magnetic nanoparticles using tryptophan-isatin for potential bio-applications.

Area of Science:

• Biomedical Engineering
• Nanotechnology
• Oncology

Background:

• Glioblastoma multiforme is an aggressive brain tumor with limited treatment options.
• Magnetic nanoparticles (MNPs) offer potential for targeted drug delivery.
• Tryptophan (Trp) and isatin (Isa) possess inherent anticancer properties and blood-brain barrier permeability.

Purpose of the Study:

• To develop biocompatible MNPs functionalized with Trp and Isa for glioblastoma therapy.
• To evaluate the efficacy of Trp-Isa functionalized MNPs as a radiosensitizing agent.
• To explore the molecular pathways involved in glioblastoma targeted by Trp and Isa.

Main Methods:

• Synthesis and characterization of Trp-Isa functionalized MNPs using SEM-EDS, FTIR, XPS, and DLS.
• Assessment of cellular uptake and cytotoxicity in U-87 human glioblastoma cells via MTT assay.
• Evaluation of radiosensitizing effects and molecular pathway analysis using STRING.

Main Results:

• Spherical MNPs of 100-110 nm were successfully synthesized and functionalized.
• Trp-Isa functionalized MNPs showed no significant cytotoxicity at tested concentrations.
• Pretreatment with Trp-Isa MNPs combined with radiotherapy resulted in a 70% reduction in glioblastoma cell viability.

Conclusions:

• Trp-Isa functionalized MNPs demonstrate potential as a dual-action nanoplatform for glioblastoma treatment, combining targeted delivery and radiosensitization.
• This approach highlights the broader applicability of engineered nanoparticles in nanomedicine.
• Further research is warranted to translate these findings into clinical applications for brain tumor therapy.