"Spontaneous" FRA16B is a Hot Spot for Sister Chromatid Exchanges

Overview

Journal Hum Genet

Specialty Genetics

Date 1991 Sep 1

PMID 1916761

Citations 2

Authors

T Lukusa

E MEULEPAS

J P Fryns

H Van Den Berghe

J J Cassiman

Affiliations

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Abstract

Six heterozygous carriers of a fragile site at 16q22 were available for the current study. We demonstrated that the observed fragile site was a "BrdUrd-sensitive" fra(16)(q22) or FRA16B, capable of spontaneous expression in some individuals (= "spontaneous" FRA16B). Significant differences either in spontaneous or in ethylmethane sulfonate (EMS)-induced sister chromatid exchange (SCE) frequencies were found between the fragile 16q22 site, whether expressed or not, and its homologous normal site. These data complement our previous findings on FRAXA and provide additional arguments indicating that fragility and SCE are variable cytogenetic expressions of the same DNA structural alteration.

Citing Articles

repeat expansion creates the unstable folate-sensitive fragile site FRA9A.

Mirceta M, Schmidt M, Shum N, Prasolava T, Meikle B, Lanni S NAR Mol Med. 2024; 1(4):ugae019.

PMID: 39669124 PMC: 11632612. DOI: 10.1093/narmme/ugae019.

Fragile sites, chromosomal lesions, tandem repeats, and disease.

Mirceta M, Shum N, Schmidt M, Pearson C Front Genet. 2022; 13:985975.

PMID: 36468036 PMC: 9714581. DOI: 10.3389/fgene.2022.985975.

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