PMID: 9171167May 1, 1997Paper

Cerebellar grafts partially reverse amino acid receptor changes observed in the cerebellum of mice with hereditary ataxia: quantitative autoradiographic studies

Cell Transplantation
K StasiE D Kouvelas

Abstract

We used quantitative autoradiography of [3H]CNQX (200 nM), [3H]muscimol (13 nM), and [3H]flunitrazepam (10 nM) binding to study the distribution of non-NMDA and GABA(A) receptors in the cerebellum of pcd mutant mice with unilateral cerebellar grafts. Nonspecific binding was determined by incubation with 1 mM Glu, 200 microM GABA, or 1 microM clonazepam, respectively. Saturation parameters were defined in wild-type and mutant cerebella. In mutants, non-NMDA receptors were reduced by 38% in the molecular layer and by 47% in the granule cell layer. The reduction of non-NMDA receptors in the pcd cerebellar cortex supports their localization on Purkinje cells. [3H]CNQX binding sites were visualized at higher density in grafts that had migrated to the cerebellar cortex of the hosts (4.1 and 11.0 pmol/mg protein, respectively, at 23 and 37 days after grafting) than in grafts arrested intraparenchymally (2.6 and 6.2 pmol/mg protein, respectively, at 23 and 37 days after grafting). The pattern of expression of non-NMDA receptors in cortical vs. parenchymal grafts suggests a possible regulation of their levels by transacting elements from host parallel fibers. GABA(A) binding levels in the grafts for both ligands used were similar to nor...Continue Reading

Citations

Apr 28, 2007·Journal of Neurogenetics·Kenji AkitaShigeharu Fukuda

❮ Previous
Next ❯

Related Concepts

Related Feeds

Ataxias

Ataxia is a neurological condition characterized by lack of voluntary coordination of muscle movements including loss of coordination, balance, and speech. Discover the latest research on different types of ataxias here.