ArticleJournal of materials science. Materials in medicine2020
Tryptophan conjugated magnetic nanoparticles for targeting tumors overexpressing indoleamine 2,3 dioxygenase (IDO) and L-type amino acid transporter.
Article in Journal of materials science. Materials in medicine, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
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Who cites it
4 citing papers in PubMed, 18 citations in OpenAlex.
- Stereoselective design of amino acid bioconjugates: targeting strategies and physicochemical optimization.RSC medicinal chemistry · 2026Review
- Molecular Mechanisms in Metal Oxide Nanoparticle-Tryptophan Interactions.Inorganic chemistry · 2024Article
- The cross-talk between macrophages and tumor cells as a target for cancer treatment.Frontiers in oncology · 2023Review
- 3-Aminopropylsilatrane and Its Derivatives: A Variety of Applications.Molecules (Basel, Switzerland) · 2022Review
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Authors and funding
8 authors at 3 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Tryptophan is an amino acid required by all life forms for protein synthesis and other important metabolic functions. It is metabolized in the body using the kynurenine pathway which involves the enzyme indoleamine 2,3 dioxygenase (IDO) and its transport is regulated through the L-type amino acid transporters (LAT 1). IDO and LAT 1 are found to be overexpressed in many cancers i.e., ovarian, lung colorectal etc. In this study we have used this specific interaction as the basis for designing diagnostic agent based on iron oxide nanoparticles which can specifically target the IDO/LAT 1 over expressing tumors. We have conjugated tryptophan to the surface of super-paramagnetic nanoparticles chemically using 3-aminopropyltrimethoxysilane as a linker. The synthesized tryptophan conjugated magnetic nano-conjugate has been characterized using FTIR, UV-Vis, TEM for its shape size, charge and NMR and Mass for conjugation. The magnetization studies show decrease in the magnetic behavior after conjugation however the desired super-paramagnetic property is still retained as shown by the signature sigmoidal B-H curve. The nano-conjugate shows minimal cytotoxicity over 24 h as shown by the SRB assay in two cell lines A-549, MCF-7. Using 99mTc labeling the biodistribution and the blood kinetics of the magnetic nano-conjugate was evaluated. The study highlights the suitability of the designed magnetic Nano bioconjugate as a potential bimodal diagnostic agent.
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