期刊
PROCEEDINGS OF THE SOCIETY FOR EXPERIMENTAL BIOLOGY AND MEDICINE
卷 223, 期 2, 页码 175-182出版社
BLACKWELL SCIENCE INC
DOI: 10.1046/j.1525-1373.2000.22324.x
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资金
- NINDS NIH HHS [R01 NS38315] Funding Source: Medline
Using dynamic Magnetic Resonance Imaging (dMRI), blood-brain barrier (BBB) permeability (k(PS rho)) and tissue interstitial leakage space (v(e)) were evaluated in zinc-deficient (ZnDF) male weanling Wistar rats following 3 days exposure to hyperoxia (85% O-2). Temporal monitoring of T1-weighted MR image changes, following a bolus intravenous injection of gadolinium-DTPA, allowed estimation of BBB integrity, Three-day exposure of hyperoxia caused a marginal loss of BBB integrity, reflected in a slight increase in k(PS rho) and v(e), observed in both the animals fed adequate zinc (ZnAL) and pair-fed controls (ZnPF), However, zinc deficiency resulted in a significant increase in both k(PS rho) and v(e), indicating a severely disturbed BBB, In addition MR-visible free water was elevated in ZnDF brains following hyperoxia treatment indicating that a loss of BBB integrity may be associated with neuronal edema. The diminished BBB integrity may be free-radical mediated as the ratio of oxidized to reduced glutathione (GSSG:GSH) was significantly elevated.
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