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8-Anilino-1-naphthalenesulfonate-Conjugated Carbon-Coated Ferrite Nanodots for Fluoromagnetic Imaging, Smart Drug Delivery, and Biomolecular Sensing

Thirumalai, Anbazhagan, Girigoswami, Koyeli, Prabhu, Alex Daniel, Durgadevi, Pazhani, Kiran, Venkatakrishnan, Girigoswami, Agnishwar·2024·Pharmaceutics
DOI 10.3390/pharmaceutics16111378PMC PMC11597131
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Abstract

Background: Superparamagnetic properties and excitation independence have been incorporated into carbon-decorated manganese ferrite nanodots (MnFe@C) to introduce an economical and safer multimodal agent for use in both T1-T2 MRI and fluorescence-based imaging to replace the conventional highly toxic heavy metal contrast agents. Methods: The surface conjugation of 8-anilino-1-naphthalenesulfonate (ANS) to MnFe@C nanodots (ANS-MnFe@C) enhances both longitudinal and transverse MRI relaxation, improves fluorescence for optical imaging, and increases protein detection sensitivity, showing higher multimodal efficacy in terms of molar relaxivity, radiant efficiencies, and fluorescence sensitivity compared to MnFe@C. Results: The band gap energy was determined using Tauc’s equation to be 3.32 eV, while a 72% quantum yield demonstrated that ANS-MnFe@C was highly fluorescent, with the linear range and association constant calculated using the Stern–Volmer relation. The synthesized ANS-MnFe@C demonstrated excellent selectivity and sensitivity for bovine serum albumin (BSA), with a nanomolar detection limit of 367.09 nM and a broad linear range from 0.015 to 0.225 mM. Conclusions: In conclusion, ANS-MnFe@C holds ease of fabrication, good biocompatibility, as assessed in A375 cells, and an effective pH-sensitive doxorubicin release profile to establish anticancer activity in lung cancer cell line (A549), highlighting its potential as an affordable therapeutic agent for multimodal imaging, drug delivery, and protein sensing.

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Metadata

Authors
Thirumalai, A., Girigoswami, K., Prabhu, A. D., Durgadevi, P., Kiran, V., & Girigoswami, A.
Venue
Pharmaceutics
Publisher
MDPI AG
Published
2024-10-26
Volume
16
Issue
11
Pages
1378
ISSN
1999-4923
DOI
10.3390/pharmaceutics16111378
PMC
PMC11597131
Cited by
40
References
1
Language
en
Licence
creativecommons.org/licenses/by/4.0/ (vor)

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