Emerging molecular mechanisms of brain tumour oedema

Authors: Papadopoulos, M.C.¹; Saadoun, S.²; Davies, D.C.²; Bell, B.A.³

Source: British Journal of Neurosurgery, Volume 15, Number 2, 1 April 2001 , pp. 101-108(8)

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Abstract:

A common property of brain tumours is their ability to cause oedema in the surrounding brain. Oedema forms as a result of a leaky blood-tumour barrier and persists when the brain fails to clear the excess fluid. It is a significant source of morbidity and mortality. The principal anatomical component of the blood-brain barrier is the endothelial tight junction which opens in glioma microvessels. Multiple tight junction proteins have recently been identified, such as occludin, claudin, ZO-1, ZO-2 and ZO-3. We propose a model to explain tight junction opening in gliomas based on vascular endothelial growth factor secretion and loss of tight junction inducing factor production by tumour cells. The level of expression of the water channel aquaporin-4 in peritumoural astrocytes may determine the rate of oedema fluid clearance. The identification of the molecular mechanisms of brain tumour oedema may allow the design of novel anti-oedema medications.

Keywords: AQUAPORIN; CLAUDIN; GLIOBLASTOMA; OCCLUDIN; VASOGENIC; OEDEMA; ZONULA; OCCLUDENS

Document Type: Review article

DOI: http://dx.doi.org/10.1080/02688690120036775

Affiliations: 1: Department of Neurosurgery, Atkinson Morley's Hospital, London, UK; MPapadopoulos@compuserve.com 2: Department of Anatomy and Developmental Biology, St George's Hospital Medical School, London, UK 3: Department of Neurosurgery, Atkinson Morley's Hospital, London, UK

Publication date: 2001-04-01

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