Lower Number of Cerebellar Purkinje Neurons in Psychosis is Associated with Reduced Reelin Expression

Overview

Journal Proc Natl Acad Sci U S A

Specialty Science

Date 2010 Feb 13

PMID 20150511

Citations 46

Authors

Ekrem Maloku

Ignacio R Covelo

Ingeborg Hanbauer

Alessandro Guidotti

Bashkim Kadriu

Qiaoyan Hu

John M Davis

Erminio Costa

Affiliations

Soon will be listed here.

Abstract

Reelin is an extracellular matrix protein synthesized in cerebellar granule cells that plays an important role in Purkinje cell positioning during cerebellar development and in modulating adult synaptic function. In the cerebellum of schizophrenia (SZ) and bipolar (BP) disorder patients, there is a marked decrease ( approximately 50%) of reelin expression. In this study we measured Purkinje neuron density in the Purkinje cell layer of cerebella of 13 SZ and 17 BP disorder patients from the McLean 66 Cohort Collection, Harvard Brain Tissue Resource Center. The mean number of Purkinje neurons (linear density, neurons per millimeter) was 20% lower in SZ and BP disorder patients compared with nonpsychiatric subjects (NPS; n = 24). This decrease of Purkinje neuron linear density was unrelated to postmortem interval, pH, drugs of abuse, or to the presence, dose, or duration of antipsychotic medications. A comparative study in the cerebella of heterozygous reeler mice (HRM), in which reelin expression is down-regulated by approximately 50%, showed a significant loss in the number of Purkinje cells in HRM (10-15%) compared with age-matched (3-9 months) wild-type mice. This finding suggests that lack of reelin impairs GABAergic Purkinje neuron expression and/or positioning during cerebellar development.

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