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Increase in Expression of Adhesion Molecule Receptors on T Helper Cells During Antipsychotic Treatment and Relationship to Blood-Brain Barrier Permeability in Schizophrenia

OBJECTIVE: The authors estimated the expression of adhesion molecule receptors (VLA-4 and LFA-1) on T helper (CD4⁺) and T suppressor/cytotoxic (CD8⁺) lymphocytes in schizophrenic patients before and during antipsychotic treatment and studied the relationship of these subpopulations to CSF measures and blood-brain barrier permeability. METHOD: Blood was drawn from hospitalized patients with schizophrenia before (N=45) and after (N=22) neuroleptic treatment and from an age-matched comparison group (N=41). Lumbar punctures were performed on 32 of the schizophrenic patients. RESULTS: During antipsychotic treatment there were significant increases in the percentages of VLA-4⁺/CD4⁺ and VLA-4⁺/CD8⁺ cells. VLA-4⁺/CD4⁺ and LFA-1⁺/CD4⁺ cells were both closely related to disturbance of the blood-brain barrier. Higher values for VLA-4⁺/CD4⁺ and LFA-1⁺/CD4⁺ cells were found in patients with a disturbed blood-brain barrier. CONCLUSIONS: The findings suggest that adhesion molecules are involved in immunoregulation between the central nervous system and the peripheral immune system in schizophrenia.

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				N. Muller, M. Riedel, C. Scheppach, B. Brandstatter, S. Sokullu, K. Krampe, M. Ulmschneider, R. R. Engel, H.-J. Moller, and M. J. Schwarz Beneficial Antipsychotic Effects of Celecoxib Add-On Therapy Compared to Risperidone Alone in Schizophrenia Am J Psychiatry, June 1, 2002; 159(6): 1029 - 1034. [Abstract] [Full Text] [PDF]

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