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Synthesis of Aptamer-PEI-g-PEG Modified Gold Nanoparticles Loaded with Doxorubicin for Targeted Drug Delivery
Published on: June 23, 2020
Doxorubicin-loaded gold nanoparticles for enhanced anticancer efficacy: in vitro, in vivo, and FTIR-based tissue
Amna H Faid1, Ali Abdelaziem1, Nehal Ali2
1Department of Laser Sciences and Interactions, National Institute of Laser Enhanced Science (NILES), Cairo University, Giza, 12613, Egypt.
Abstract:
The most challenging aspects of cancer treatment are multi-drug resistance (MDR) and damage to normal, non-malignant cells. Doxorubicin (Dox)-loaded gold nanoparticles (Dox@AuNPs) were developed and evaluated for enhanced anticancer activity. The nanocomposites exhibited spherical morphology (13 ± 3 nm) with a loading efficiency of 52%. In vitro, Dox@AuNPs reduced the IC₅₀ by approximately 50% compared to free Dox in MCF-7 cells. In vivo, treatment significantly suppressed tumor growth and increased median survival (62 days) relative to free Dox (52 days). In addition to conventional efficacy evaluation, Fourier transform infrared (FTIR) spectroscopy was applied to analyze biochemical changes in tumor tissues. Distinct alterations in protein, lipid, and nucleic acid-associated bands were observed, with treated tissues showing partial spectral shifts toward normal profiles. These findings suggest that FTIR may provide additional insight into tissue-level biochemical responses following treatment. While further validation and toxicity assessment are required, the results demonstrate that Dox@AuNPs enhance anticancer efficacy and highlight the potential utility of FTIR as a complementary tool for evaluating therapeutic response.
Insights
Doxorubicin-loaded gold nanoparticles effectively combat cancer by reducing drug resistance and normal cell damage. Fourier transform infrared spectroscopy shows promise in assessing treatment effectiveness.
Area of Science:
- Biomedical Engineering
- Nanotechnology
- Cancer Research
Background:
- Multidrug resistance (MDR) and damage to normal cells are significant challenges in cancer therapy.
- Doxorubicin (Dox) is a widely used chemotherapy drug with limitations.
Purpose of the Study:
- To develop and evaluate doxorubicin-loaded gold nanoparticles (Dox@AuNPs) for enhanced anticancer activity.
- To investigate the potential of Fourier transform infrared (FTIR) spectroscopy in assessing therapeutic response.
Main Methods:
- Synthesis and characterization of Dox@AuNPs (spherical morphology, 13±3 nm, 52% loading efficiency).
- In vitro cytotoxicity assessment using MCF-7 cells, comparing Dox@AuNPs to free Dox.
- In vivo efficacy study in tumor-bearing models, evaluating tumor growth and survival rates.
- Biochemical analysis of tumor tissues using FTIR spectroscopy.
Main Results:
- Dox@AuNPs demonstrated a ~50% reduction in IC₅₀ compared to free Dox in vitro.
- In vivo studies showed significant tumor growth suppression and increased median survival (62 days vs. 52 days for free Dox).
- FTIR analysis revealed distinct biochemical changes in tumor tissues, with treated tissues showing shifts towards normal profiles.
Conclusions:
- Dox@AuNPs enhance anticancer efficacy, potentially overcoming MDR and reducing side effects.
- FTIR spectroscopy offers a valuable complementary tool for evaluating tissue-level biochemical responses to cancer therapy.
- Further validation and toxicity studies are warranted for clinical translation.
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