Global HDO uptake in human glioma xenografts is related to the perfused capillary distribution

Research output: Contribution to journalArticle

Abstract

The aim of this study is to evaluate the existence of a possible relationship between global deuterium-labeled water (HDO) uptake rates and the diffusion geometry of human glioma xenografts in nude mice. HDO diffusion times in the whole extravascular tumor volume were estimated by combining quantitative (1)H-MR diffusion imaging and morphometric analysis of intercapillary distances in two tumor lines with a different perfused vascular architecture. HDO uptake was measured independently using (2)H-magnetic resonance spectroscopy. Time constants of HDO-uptake curves (tau) were compared to estimations of maximum HDO diffusion times (t(difmax)). Tumors with a homogeneously perfused capillary distribution showed a mono-exponential HDO uptake. The t(difmax) was comparable to tau values of HDO uptake curves: t(difmax) varied between 74 and 368 sec and the range of tau values was 115-370 sec. Heterogeneously perfused tumors had a bi-exponential HDO uptake with t(difmax) in between the tau values of the fast and slow uptake phase. These findings indicate that the global HDO uptake is related to the perfused capillary distribution in human glioma xenografts. That HDO uptake rates indeed can depend on the perfused capillary distribution was substantiated in experiments with two-dimensional (2D) models. In these models with a diffusion-limited HDO uptake, HDO uptake curves could be approximated by curves derived from 2D HDO diffusion simulations. Magn Reson Med 42:479-489, 1999.

Details

Authors
  • B P van der Sanden
  • H.J.A. In 't Zandt
  • L Hoofd
  • R A de Graaf
  • K Nicolay
  • P F Rijken
  • A J van der Kogel
  • Arend Heerschap
External organisations
  • Utrecht University
  • Radboud University Medical Center
Research areas and keywords

Keywords

  • Animals, Body Water, Capillary Permeability, Deuterium, Diffusion, Glioma, Humans, Image Processing, Computer-Assisted, Immunohistochemistry, Linear Models, Magnetic Resonance Spectroscopy, Mice, Mice, Inbred BALB C, Mice, Nude, Microscopy, Fluorescence, Transplantation, Heterologous, Tumor Cells, Cultured, Journal Article, Research Support, Non-U.S. Gov't
Original languageEnglish
Pages (from-to)479-89
Number of pages11
JournalMagnetic Resonance in Medicine
Volume42
Issue number3
Publication statusPublished - 1999 Sep
Publication categoryResearch
Peer-reviewedYes
Externally publishedYes