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Volume 26, Issue 1
  • ISSN: 1389-2010
  • E-ISSN: 1873-4316

Abstract

Introduction

Active targeting of tumors by nanomaterials favors early diagnosis and the reduction of harsh side effects of chemotherapeuticals.

Methods

We synthesized magnetic nanoparticles (64 nm; -40 mV) suspended in a magnetic fluid (MF) and decorated them with anti-carcinoembryonic antigen (MFCEA; 144 nm; -39 mV). MF and MFCEA nanoparticles were successfully radiolabeled with technetium–99m (99mTc) and intravenously injected in CEA-positive 4T1 tumor-bearing mice to perform biodistribution studies. Both 99mTc-MF and 99mTc-MFCEA had marked uptake by the liver and spleen, and the renal uptake of 99mTc-MFCEA was higher than that observed for 99mTc-MF at 20h. At 1 and 5 hours, the urinary excretion was higher for 99mTc-MF than for 99mTc-MFCEA.

Results

These data suggest that anti-CEA decoration might be responsible for a delay in renal clearance. Regarding the tumor, 99mTc-MFCEA showed tumor uptake nearly two times higher than that observed for 99mTc-MFCEA. Similarly, the target-nontarget ratio was higher with 99mTc-MFCEA when compared to the group that received the 99mTc-MF.

Conclusion

These data validated the ability of active tumor targeting by the as-developed anti-CEA loaded nanoparticles and are very promising results for the future development of a nanodevice for the management of breast cancer and other types of CEA-positive tumors.

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Biodistribution and Tumor Targeted Accumulation of Anti-CEA-loaded Iron Nanoparticles
Current Pharmaceutical Biotechnology 26, 108 (2025); https://doi.org/10.2174/0113892010268872240104114444
/content/journals/cpb/10.2174/0113892010268872240104114444
/content/journals/cpb/10.2174/0113892010268872240104114444
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  • Article Type:     Research Article
Keyword(s): breast cancer; carcinoembryonic antigen; magnetic nanoparticles; nanotechnology; Targeting; theranostic

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