Effects of tissue stretching or cell shrinkage on penetration depth of macromolecules in a rat fibrosarcoma

Sarah M. McGuire, Fan Yuan

Research output: Contribution to journalConference articlepeer-review


Interstitial penetration is critical for drug delivery in tumor tissues. To experimentally determine the penetration depth of macromolecules at the steady state, rat fibrosarcoma tissues were sectioned into 600μm slices and incubated in solutions of dextrans with molecular weights of 10 kDa, 70 kDa, and 2000 kDa, respectively. After incubation, 10 μm cross-sections were taken and imaged to determine normalized steady-state concentration profiles as a function of molecular size. 10 kDa dextran had a relatively uniform concentration distribution. However, the concentration profile was nonuniform for 70 kDa dextran and the least uniform for 2000 kDa dextran. Stretching or incubation of tissues in 1 M mannitol solution improved the penetration of macromolecules in tissues. These results indicate that creating more interstitial space by either stretching or reducing cell size improves macromolecule distribution in tissues.

Original languageEnglish (US)
Pages (from-to)516-517
Number of pages2
JournalAnnual International Conference of the IEEE Engineering in Medicine and Biology - Proceedings
StatePublished - Dec 1 2002
EventProceedings of the 2002 IEEE Engineering in Medicine and Biology 24th Annual Conference and the 2002 Fall Meeting of the Biomedical Engineering Society (BMES / EMBS) - Houston, TX, United States
Duration: Oct 23 2002Oct 26 2002


  • Drug delivery
  • Interstitial penetration

ASJC Scopus subject areas

  • Signal Processing
  • Biomedical Engineering
  • Computer Vision and Pattern Recognition
  • Health Informatics


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