Cited by 2,438Barrier Structure and Function StudiesAngiogenesis and VEGF in CancerNanoparticle-Based Drug Delivery

Regulation of transport pathways in tumor vessels: Role of tumor type and microenvironment

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Hobbs, Susan K., Monsky, Wayne L., Yuan, Fan, Roberts, W. Gregory, Griffith, Linda, Torchilin, Vladimir P., Jain, Rakesh K.·1998·Proceedings of the National Academy of Sciences

Abstract

Novel anti-neoplastic agents such as gene targeting vectors and encapsulated carriers are quite large (approximately 100–300 nm in diameter). An understanding of the functional size and physiological regulation of transvascular pathways is necessary to optimize delivery of these agents. Here we analyze the functional limits of transvascular transport and its modulation by the microenvironment. One human and five murine tumors including mammary and colorectal carcinomas, hepatoma, glioma, and sarcoma were implanted in the dorsal skin-fold chamber or cranial window, and the pore cutoff size, a functional measure of transvascular gap size, was determined. The microenvironment was modulated: ( i ) spatially, by growing tumors in subcutaneous or cranial locations and ( ii ) temporally, by inducing vascular regression in hormone-dependent tumors. Tumors grown subcutaneously exhibited a characteristic pore cutoff size ranging from 200 nm to 1.2 μm. This pore cutoff size was reduced in tumors grown in the cranium or in regressing tumors after hormone withdrawal. Vessels induced in basic fibroblast growth factor-containing gels had a pore cutoff size of 200 nm. Albumin permeability was independent of pore cutoff size. These results have three major implications for the delivery of therapeutic agents: ( i ) delivery may be less efficient in cranial tumors than in subcutaneous tumors, ( ii ) delivery may be reduced during tumor regression induced by hormonal ablation, and ( iii ) permeability to a molecule is independent of pore cutoff size as long as the diameter of the molecule is much less than the pore diameter.

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Crossref · 10.1073/pnas.95.8.4607

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  • The TRPV4 stimulation system offers a highly tunable system for modeling cancers with variable levels of vascular leakiness.

    “to o ff er a highly tunable system for modeling cancers with variable levels of vascular leakiness. 7”

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Authors
Hobbs, S. K., Monsky, W. L., Yuan, F., Roberts, W. G., Griffith, L., Torchilin, V. P., & Jain, R. K.
Affiliations
Harvard University (US)
Venue
Proceedings of the National Academy of Sciences
Published
1998-04-14
Volume
95
Issue
8
Pages
4607-4612
ISSN
  • 0027-8424 (ISSN-L)
  • 1091-6490
OpenAlex
W1985858988
Cited by
2,438
References
1
Citations by year
2026: 34 · 2025: 42 · 2024: 68 · 2023: 89 · 2022: 100 · 2021: 91 · 2020: 125 · 2019: 108 · 2018: 121 · 2017: 126 · 2016: 150 · 2015: 139 · 2014: 143 · 2013: 185 · 2012: 140
FWCI
14.51
Type
journal article
Language
en
Open access
Locations
  • Proceedings of the National Academy of Sciences (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health
  • National Cancer Institute (R35CA056591, R35-CA-56591)
Topics
  • Life Sciences › Neuroscience › Neurology › Barrier Structure and Function Studies
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Angiogenesis and VEGF in Cancer
  • Physical Sciences › Materials Science › Biomaterials › Nanoparticle-Based Drug Delivery
Keywords
tumor vasculature, tumor microenvironment, albumin permeability, cancer types, intracranial tumors, subcutaneous tumor, tumor regression, hormone withdrawal, basic fibroblast growth factor, gene delivery
MeSH terms
Adenocarcinoma, Animals, Colonic Neoplasms, Humans, Liposomes, Male, Microcirculation, Microspheres, Neoplasms, Experimental, Neovascularization, Pathologic, Orchiectomy, Fibroblast Growth Factor 2, Mice

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