Pathophysiological analyses of leptomeningeal heterotopia using gyrencephalic mammals.

Abstract:

:Leptomeningeal glioneuronal heterotopia (LGH) is a focal malformation of the cerebral cortex and frequently found in patients with thanatophoric dysplasia (TD). The pathophysiological mechanisms underlying LGH formation are still largely unclear because of difficulties in obtaining brain samples from human TD patients. Recently, we established a new animal model for analysing cortical malformations of human TD by utilizing our genetic manipulation technique for gyrencephalic carnivore ferrets. Here we investigated the pathophysiological mechanisms underlying the formation of LGH using our TD ferrets. We found that LGH was formed during corticogenesis in TD ferrets. Interestingly, we rarely found Ki-67-positive and phospho-histone H3-positive cells in LGH, suggesting that LGH formation does not involve cell proliferation. We uncovered that vimentin-positive radial glial fibers and doublecortin-positive migrating neurons were accumulated in LGH. This result may indicate that preferential cell migration into LGH underlies LGH formation. Our findings provide novel mechanistic insights into the pathogenesis of LGH in TD.

journal_name

Hum Mol Genet

journal_title

Human molecular genetics

authors

Matsumoto N,Kobayashi N,Uda N,Hirota M,Kawasaki H

doi

10.1093/hmg/ddy014

subject

Has Abstract

pub_date

2018-03-15 00:00:00

pages

985-991

issue

6

eissn

0964-6906

issn

1460-2083

pii

4793003

journal_volume

27

pub_type

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