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In Vitro Doxorubicin Delivery Using TPP-Folate-Dendrimer-Functionalized Gold Nanoclusters.

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Summary
This summary is machine-generated.

This study developed targeted gold nanoclusters (AuNCs) for selective doxorubicin delivery to cancer cells, showing reduced side effects. These novel nanocomplexes offer a promising strategy for improved cancer therapy.

Keywords:
PAMAM dendrimerscytotoxicitydeliverydoxorubicinfolic acidgold nanoclustersmitochondriatriphenylphosphonium cation

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Area of Science:

  • Nanotechnology
  • Biomedical Engineering
  • Materials Science

Background:

  • Cancer poses a significant global health challenge, necessitating targeted therapies.
  • Selective chemotherapy delivery is crucial to enhance efficacy and minimize side effects.
  • Folate receptor-expressing cancer cells present a target for specific drug delivery.

Purpose of the Study:

  • To investigate gold nanoclusters (AuNCs) functionalized with poly(amidoamine) dendrimers (PAMAM) and folic acid (FA) for targeted doxorubicin (DOX) delivery.
  • To evaluate the selective toxicity and cellular uptake mechanisms of these functionalized AuNCs in various cancer cell lines.
  • To assess the potential of these nanocomplexes in improving cancer treatment outcomes.

Main Methods:

  • Synthesis and characterization of AuNCs using spectroscopy and microscopy.
  • Functionalization of AuNCs with folic acid (FA) for receptor targeting and triphenylphosphonium cation (TPP+) for mitochondrial localization.
  • Assessment of cytotoxicity, apoptosis, caspase activity, mitochondrial potential, and oxidative stress in cancer (MCF-7, HeLa, Caco-2, MDA-MB-231) and normal (HEK293) cells.

Main Results:

  • Successful synthesis of AuNCs confirmed by spectroscopic and microscopic analyses.
  • High doxorubicin (DOX) loading (>78%) and pH-dependent release (90% at pH 4.5).
  • Selective dose-dependent cytotoxicity observed in cancer cells compared to normal HEK293 cells, with enhanced effects in HeLa and MCF-7 cells.

Conclusions:

  • Folate receptor-mediated uptake and mitochondrial localization of TPP+ nanocomplexes contribute to enhanced cytotoxicity in cancer cells.
  • The developed drug-AuNC nanocomplexes demonstrate potential for targeted cancer therapy with minimized systemic side effects.
  • This approach offers a novel strategy for efficient and selective drug delivery to cancer cells.