2021
DOI: 10.1002/ajmg.a.62228
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Spread of X‐chromosome inactivation into autosomal regions in patients with unbalanced X‐autosome translocations and its phenotypic effects

Abstract: Patients with unbalanced X-autosome translocations are rare and usually present a skewed X-chromosome inactivation (XCI) pattern, with the derivative chromosome being preferentially inactivated, and with a possible spread of XCI into the autosomal regions attached to it, which can inactivate autosomal genes and affect the patients' phenotype. We describe three patients carrying different unbalanced X-autosome translocations, confirmed by G-banding karyotype and array techniques. We analyzed their XCI pattern a… Show more

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Cited by 4 publications
(2 citation statements)
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References 69 publications
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“…The pseudo dicentric chromosome 45, X, psu dic (X; 18) (p11.2; p11.2) indicated by the C-band karyotype is an unbalanced X-autosome translocation. Some unbalanced X-autosome translocations have been reported to be preferentially inactivated, which could spread X chromosome inactivation (XCI) into the autosomal chromosome regions and inactivate autosomal genes ( Favilla et al, 2021 ). We could not measure the extent of the spreading into the translocated 18.…”
Section: Discussionmentioning
confidence: 99%
“…The pseudo dicentric chromosome 45, X, psu dic (X; 18) (p11.2; p11.2) indicated by the C-band karyotype is an unbalanced X-autosome translocation. Some unbalanced X-autosome translocations have been reported to be preferentially inactivated, which could spread X chromosome inactivation (XCI) into the autosomal chromosome regions and inactivate autosomal genes ( Favilla et al, 2021 ). We could not measure the extent of the spreading into the translocated 18.…”
Section: Discussionmentioning
confidence: 99%
“…[2021] [13], revealed inactivation of the maternal and paternal alleles in the ratio of 71% and 29%, respectively, with the normal allele being preferentially inactive. Her mother presented a skewed XCI towards a different allele (78%:22%) (Fig.…”
Section: Cytogenetic and Molecular Analysismentioning
confidence: 99%