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Blood-central nervous system barriers in morphine dependence and withdrawal.: Blood-brain barrier in morphine withdrawal stress
Uppsala University, Medicinska vetenskapsområdet, Faculty of Medicine, Department of Medical Cell Biology. Department of Surgical Sciences. Neuroanatomy. (Anaesthesiology)
2004 (English)In: Blood-Spinal Cord and Brain Barriers in Health and Disease, Academic Press, Elsevier, San Diego, USA , 2004, 299-328 p.Chapter in book (Refereed)
Abstract [en]

The status of the blood-CNS barriers during morphine dependence or withdrawal is still unknown. Morphine-withdrawal is associated with profound stress response, immediate early gene expression in the CNS and alterations in neurochemical metabolism. Thus, a possibility exists that stress caused by morphine withdrawal will impair blood-CNS barriers function. Experiments carried out in our laboratory show that spontaneous morphine withdrawal in rats is associated with a selective and specific breakdown of the blood-brain, blood-CSF and blood-spinal cord barriers to Evans blue albumin, radioactive iodine and lanthanum (La3+) tracers. Several brain regions show pronounced structural alterations during morphine dependence and withdrawal. Pharmacological manipulations of nitric oxide (NO), serotonin (5-hydroxytryptamine) or Ca2+ channel during morphine dependence and withdrawal attenuates the blood-CNS barrier dysfunction and structural changes. These observations suggest that morphine dependence and withdrawal is associated with alterations in CNS microfluid environment and brain damage. The functional significance of these findings and the probable mechanisms are discussed.

Place, publisher, year, edition, pages
Academic Press, Elsevier, San Diego, USA , 2004. 299-328 p.
National Category
Clinical Medicine
Identifiers
URN: urn:nbn:se:uu:diva-69737ISBN: 0-12-639011-8 (print)OAI: oai:DiVA.org:uu-69737DiVA: diva2:97648
Note
Chapter-16Available from: 2005-08-17 Created: 2005-08-17

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