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Targeting Pancreatic Cancer Cells and Stellate Cells Using Designer Nanotherapeutics in vitro.

Chandra Kumar Elechalawar1, Md Nazir Hossen1, Priya Shankarappa2

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International Journal of Nanomedicine
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Researchers developed targeted gold nanoparticles to deliver gemcitabine, improving pancreatic cancer treatment. This system effectively reduced pancreatic cancer cells and pancreatic stellate cells viability in vitro.

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PEGylationdrug deliverygold nanoparticlespancreatic cancer

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Area of Science:

  • Biomedical Engineering
  • Nanotechnology
  • Oncology

Background:

  • Pancreatic cancer (PC) features a dense desmoplastic stroma limiting gemcitabine efficacy.
  • Pancreatic stellate cells (PSCs) and pancreatic cancer cells (PCCs) crosstalk drives desmoplasia.
  • Efficient drug delivery to the tumor microenvironment (TME) is a significant clinical hurdle.

Purpose of the Study:

  • To engineer a targeted drug delivery system for enhanced gemcitabine delivery in pancreatic cancer.
  • To inhibit proliferation of PCCs and PSCs using a novel nanoconjugate.
  • To overcome the limitations of gemcitabine uptake in the PC tumor microenvironment.

Main Methods:

  • Development of gold nanoparticle (AuNP)-based nanoconjugates.
  • Functionalization with anti-EGFR antibody cetuximab (C225) for targeting.
  • Incorporation of gemcitabine (drug) and polyethylene glycol (PEG) for stealth properties.
  • Characterization using UV-Vis spectroscopy, TEM, HPLC, and INAA.

Main Results:

  • Targeted gemcitabine delivery systems with PEGylated nanoconjugates (ACG44P1000) showed enhanced efficacy.
  • Reduced viability in both PCCs and PSCs compared to non-targeted systems.
  • EGFR-targeted pathway confirmed by pre-treatment with cetuximab.

Conclusions:

  • A novel PEGylated targeted nanoconjugate (ACG44P1000) was successfully developed for selective gemcitabine delivery.
  • The nanoconjugate demonstrated superior in vitro efficacy against PCCs and PSCs.
  • Future studies will focus on in vivo evaluation for desmoplasia and tumor growth inhibition.