Early Postnatal Ataxia and Abnormal Cerebellar Development in Mice Lacking Xeroderma Pigmentosum Group A and Cockayne Syndrome Group B DNA Repair Genes

Overview

Journal Proc Natl Acad Sci U S A

Specialty Science

Date 2001 Nov 1

PMID 11687625

Citations 39

Authors

M Murai

Y Enokido

N Inamura

M Yoshino

Y Nakatsu

G T van der Horst

J H Hoeijmakers

K Tanaka

H Hatanaka

Affiliations

Soon will be listed here.

Abstract

Xeroderma pigmentosum (XP) and Cockayne syndrome (CS) are rare autosomal recessive disorders associated with a defect in the nucleotide excision repair (NER) pathway required for the removal of DNA damage induced by UV light and distorting chemical adducts. Although progressive neurological dysfunction is one of the hallmarks of CS and of some groups of XP patients, the causative mechanisms are largely unknown. Here we show that mice lacking both the XPA (XP-group A) and CSB (CS-group B) genes in contrast to the single mutants display severe growth retardation, ataxia, and motor dysfunction during early postnatal development. Their cerebella are hypoplastic and showed impaired foliation and stunted Purkinje cell dendrites. Reduced neurogenesis and increased apoptotic cell death occur in the cerebellar external granular layer. These findings suggest that XPA and CSB have additive roles in the mouse nervous system and support a crucial role for these genes in normal brain development.

Citing Articles

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