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The Tumor Microenvironment02:17

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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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Drug delivery methods like oral inhalation, nasal sprays, transdermal patches, eye drops, intravitreal injection,  and rectal administration provide localized effects with reduced toxicity.
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Mapping Physical Tumor Microenvironment and Drug Delivery.

Hadi T Nia1, Lance L Munn1, Rakesh K Jain2

  • 1Edwin L. Steele Laboratories, Department of Radiation Oncology, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts.

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Pancreatic tumors have abnormal physical environments that hinder drug delivery. Measuring tissue elasticity may help improve cancer treatments and patient selection.

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Area of Science:

  • Oncology
  • Biomedical Engineering
  • Cancer Biology

Background:

  • Pancreatic tumors exhibit a complex and abnormal physical microenvironment.
  • This aberrant microenvironment presents significant challenges for effective drug delivery.
  • Tumor-associated stroma plays a critical role in modulating drug penetration and efficacy.

Purpose of the Study:

  • To investigate the role of the physical microenvironment in pancreatic ductal adenocarcinoma (PDAC) drug delivery.
  • To explore tissue elasticity as a potential physical biomarker for assessing drug delivery.
  • To evaluate the utility of elasticity measurements in guiding stroma-targeting therapies and patient stratification.

Main Methods:

  • Utilized advanced imaging techniques to quantify physical properties of the pancreatic tumor microenvironment.
  • Performed mechanical testing to measure tissue elasticity in preclinical models.
  • Correlated elasticity measurements with drug distribution and therapeutic outcomes.

Main Results:

  • Demonstrated a strong correlation between increased tissue elasticity and impaired drug delivery in pancreatic tumors.
  • Identified specific elasticity thresholds associated with poor drug penetration.
  • Showcased the potential of elasticity as a predictive biomarker for treatment response.

Conclusions:

  • The physical properties of the pancreatic tumor microenvironment significantly impact drug delivery efficiency.
  • Tissue elasticity measurements offer a promising approach for assessing drug delivery abnormalities.
  • Elasticity-based biomarkers could facilitate personalized treatment strategies and improve patient stratification for pancreatic cancer.