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. 1989 Oct;26(10):626–630. doi: 10.1136/jmg.26.10.626

Alternate centromere inactivation in a pseudodicentric (15;20)(pter;pter) associated with a progressive neurological disorder.

H Rivera 1, O Zuffardi 1, P Maraschio 1, A Caiulo 1, C Anichini 1, R Scarinci 1, R Vivarelli 1
PMCID: PMC1015713  PMID: 2685311

Abstract

A 13 year old male with a severe progressive neurological disorder was found to have a pseudodicentric chromosome resulting from a telomeric fusion 15p;20p. In lymphocytes, the centromeric constriction of the abnormal chromosome was always that of the chromosome 20, while in fibroblasts both centromeres were alternately constricted. Cd staining was positive only at the active centromere, but a weak anticentromere immunofluorescence was present at the inactive one. We suggest that centromere inactivation results from a modified conformation of the functional DNA sequences preventing normal binding to centromere specific proteins. We also postulate that the patient's disorder, reminiscent of a spongy glioneuronal dystrophy as seen in Alper's and Creutzfeldt-Jakob diseases, may be secondary to the presence of the pathogenic isoform of the prion protein encoded by a gene mapped to 20p12----pter.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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