TY - JOUR

T1 - A spatial analysis of the blood-brain barrier damage in experimental allergic encephalomyelitis

AU - Juhler, M

AU - Blasberg, R G

AU - Fenstermacher, J D

AU - Patlak, C S

AU - Paulson, O B

PY - 1985/12

Y1 - 1985/12

N2 - Experimental allergic encephalomyelitis was induced in young male Lewis rats. Following the development of neurological signs, the local distribution of perivascular inflammatory cellular infiltrates and the local blood-to-tissue transfer constants (K1) of alpha-aminoisobutyric acid (AIB) were determined, and these results were compared. Perivascular infiltrative lesions were generally found near areas of the CNS that normally lack an effective blood-brain barrier (BBB) such as the choroid plexus and the entry zones of the cranial and spinal nerve roots. This distribution pattern indicates that the entry of the causative agent into CNS tissue may be by way of the permeable microvessels of these structures. In tissue around inflamed veins, the mean transfer constant was slightly but significantly increased (2.8 +/- 1.5 microliter g-1 min-1) compared with uninvolved regions (0.9 +/- 0.2 microliter g-1 min-1) and similar areas in control animals (0.9 +/- 0.3 microliter g-1 min-1). Analysis of the autoradiographic method of determining transfer constants suggested that the AIB influx rate in the lesion areas may actually be manyfold larger than measured, that BBB permeability may be greatly increased at such sites, and that the areas of lymphocytic infiltration and increased K values may be virtually identical.

AB - Experimental allergic encephalomyelitis was induced in young male Lewis rats. Following the development of neurological signs, the local distribution of perivascular inflammatory cellular infiltrates and the local blood-to-tissue transfer constants (K1) of alpha-aminoisobutyric acid (AIB) were determined, and these results were compared. Perivascular infiltrative lesions were generally found near areas of the CNS that normally lack an effective blood-brain barrier (BBB) such as the choroid plexus and the entry zones of the cranial and spinal nerve roots. This distribution pattern indicates that the entry of the causative agent into CNS tissue may be by way of the permeable microvessels of these structures. In tissue around inflamed veins, the mean transfer constant was slightly but significantly increased (2.8 +/- 1.5 microliter g-1 min-1) compared with uninvolved regions (0.9 +/- 0.2 microliter g-1 min-1) and similar areas in control animals (0.9 +/- 0.3 microliter g-1 min-1). Analysis of the autoradiographic method of determining transfer constants suggested that the AIB influx rate in the lesion areas may actually be manyfold larger than measured, that BBB permeability may be greatly increased at such sites, and that the areas of lymphocytic infiltration and increased K values may be virtually identical.

KW - Aminoisobutyric Acids/metabolism

KW - Animals

KW - Autoradiography

KW - Biological Transport

KW - Blood-Brain Barrier

KW - Brain/metabolism

KW - Brain Stem/metabolism

KW - Cell Membrane Permeability

KW - Choroid Plexus/metabolism

KW - Encephalomyelitis, Autoimmune, Experimental/metabolism

KW - Male

KW - Rats

KW - Rats, Inbred Lew

KW - Spinal Cord/metabolism

U2 - 10.1038/jcbfm.1985.82

DO - 10.1038/jcbfm.1985.82

M3 - Journal article

C2 - 3877064

VL - 5

SP - 545

EP - 553

JO - Journal of Cerebral Blood Flow and Metabolism

JF - Journal of Cerebral Blood Flow and Metabolism

SN - 0271-678X

IS - 4

ER -