Behavioral characterization of mouse models for Smith-Magenis syndrome and dup(17)(p11.2p11.2)

Katherine Walz, Corinne Spencer, Krista Kaasik, Cheng C. Lee, James R. Lupski, Richard Paylor

Research output: Contribution to journalArticlepeer-review

58 Scopus citations

Abstract

Contiguous gene syndromes (CGS) refer to a group of disorders associated with chromosomal rearrangements in which the phenotype is thought to result from altered copy number of physically linked dosage-sensitive genes. Smith-Magenis syndrome and [dup(17)(p11.2p11.2)] are CGS associated with a heterozygous deletion or duplication of band p11.2 of chromosome 17, respectively. We previously constructed animal models for these CGSs by engineering rearranged chromosomes carrying a deletion/deficiency [Df(11)17] (Del mutant) or a duplication [Dp(11)17] (Dup mutant) of the syntenic region on mouse chromosome 11. Here we present a behavioral analysis of these models indicating that heterozygous male mice carrying the engineered deletion or the duplication are hypoactive or hyperactive, respectively. In addition, male Dup mutant mice, but not Del mutant mice, have impaired contextual fear conditioning. Circadian rhythm studies revealed period length differences in Del mutant mice, but not Dup mutant mice. These results indicate that some of the behavioral abnormalities are gene dosage sensitive, whereas other behavioral abnormalities are specific to mice carrying the deletion or the duplication and can be observed in a sex preferential manner. Our findings suggest that there is a gene(s) present in this defined genomic interval that is responsible for behavioral abnormalities in the mouse, as has been shown for the human syntenic region.

Original languageEnglish (US)
Pages (from-to)367-378
Number of pages12
JournalHuman molecular genetics
Volume13
Issue number4
DOIs
StatePublished - Feb 15 2004
Externally publishedYes

ASJC Scopus subject areas

  • Molecular Biology
  • Genetics
  • Genetics(clinical)

Fingerprint

Dive into the research topics of 'Behavioral characterization of mouse models for Smith-Magenis syndrome and dup(17)(p11.2p11.2)'. Together they form a unique fingerprint.

Cite this