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Related Concept Videos

The Tumor Microenvironment02:17

The Tumor Microenvironment

8.2K
Every normal cell or tissue is embedded in a complex local environment called stroma, consisting of different cell types, a basal membrane, and blood vessels. As normal cells mutate and develop into cancer cells, their local environment also changes to allow cancer progression. The tumor microenvironment (TME) consists of a complex cellular matrix of stromal cells and the developing tumor. The cross-talk between cancer cells and surrounding stromal cells is critical to disrupt normal tissue...
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The Tumor Microenvironment02:17

The Tumor Microenvironment

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Related Experiment Video

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Microfluidic Device for Recreating a Tumor Microenvironment in Vitro
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Exploring the tumor microenvironment with nanoparticles.

Lei Miao1, Leaf Huang

  • 1Division of Molecular Pharmaceutics and Center of Nanotechnology in Drug Delivery, Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA.

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Summary
This summary is machine-generated.

Nanoparticles (NPs) show promise in cancer treatment, but tumor microenvironment barriers hinder their distribution. Strategies are needed to improve NP delivery and overcome treatment resistance.

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Evaluation of Nanoparticle Uptake in Tumors in Real Time Using Intravital Imaging
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Area of Science:

  • Nanomedicine
  • Oncology
  • Biotechnology

Background:

  • Nanotechnology offers novel approaches for cancer diagnosis and therapy.
  • The enhanced permeability and retention (EPR) effect aids nanoparticle (NP) extravasation into tumors.
  • Tumor microenvironment (TME) factors like abnormal vasculature and dense stroma impede NP distribution.

Purpose of the Study:

  • To review stroma barriers affecting NP extravasation and intratumoral distribution.
  • To discuss the impact of NP distribution on tumor cells and the TME.
  • To propose strategies for enhancing NP delivery and overcoming resistance.

Main Methods:

  • Literature review of recent studies on NP delivery in the TME.
  • Analysis of NP-stroma interactions and their biological consequences.
  • Identification of design considerations for improved NP delivery systems.

Main Results:

  • Abnormal tumor vasculature, high interstitial pressure, and dense stroma limit homogeneous NP distribution.
  • Heterogeneous NP distribution can damage non-tumor cells, affecting tumor-stroma crosstalk.
  • This can paradoxically induce acquired resistance, promoting tumor progression and metastasis.

Conclusions:

  • The TME critically influences NP distribution and therapeutic efficacy.
  • Overcoming stroma barriers is essential for effective NP-based cancer therapies.
  • Combinatorial strategies are proposed to address NP delivery challenges and acquired resistance.