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Article

Two Separate Cases: Complex Chromosomal Abnormality Involving Three Chromosomes and Small Supernumerary Marker Chromosome in Patients with Impaired Reproductive Function

1
Institute of Cytology and Genetics, The Siberian Branch of the Russian Academy of Sciences, 630090 Novosibirsk, Russia
2
Institute of Chemical Biology and Fundamental Medicine, Siberian Branch of Russian Academy of Sciences, 630090 Novosibirsk, Russia
3
Center of New Medical Technologies, 630090 Novosibirsk, Russia
4
Department of Genetic Technologies, Novosibirsk State University, 630090 Novosibirsk, Russia
*
Author to whom correspondence should be addressed.
Genes 2020, 11(12), 1511; https://doi.org/10.3390/genes11121511
Received: 23 November 2020 / Revised: 14 December 2020 / Accepted: 15 December 2020 / Published: 17 December 2020
(This article belongs to the Special Issue Chromosome-Centric View of the Genome Organization and Evolution)
For medical genetic counseling, estimating the chance of a child being born with chromosome abnormality is crucially important. Cytogenetic diagnostics of parents with a balanced karyotype are a special case. Such chromosome rearrangements cannot be detected with comprehensive chromosome screening. In the current paper, we consider chromosome diagnostics in two cases of chromosome rearrangement in patients with balanced karyotype and provide the results of a detailed analysis of complex chromosomal rearrangement (CCR) involving three chromosomes and a small supernumerary marker chromosome (sSMC) in a patient with impaired reproductive function. The application of fluorescent in situ hybridization, microdissection, and multicolor banding allows for describing analyzed karyotypes in detail. In the case of a CCR, such as the one described here, the probability of gamete formation with a karyotype, showing a balance of chromosome regions, is extremely low. Recommendation for the family in genetic counseling should take into account the obtained result. In the case of an sSMC, it is critically important to identify the original chromosome from which the sSMC has been derived, even if the euchromatin material is absent. Finally, we present our view on the optimal strategy of identifying and describing sSMCs, namely the production of a microdissectional DNA probe from the sSMC combined with a consequent reverse painting. View Full-Text
Keywords: in vitro fertilization (IVF); microdissection; reciprocal translocation; small supernumerary marker chromosomes (sSMC) in humans in vitro fertilization (IVF); microdissection; reciprocal translocation; small supernumerary marker chromosomes (sSMC) in humans
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MDPI and ACS Style

Karamysheva, T.V.; Gayner, T.A.; Muzyka, V.V.; Orishchenko, K.E.; Rubtsov, N.B. Two Separate Cases: Complex Chromosomal Abnormality Involving Three Chromosomes and Small Supernumerary Marker Chromosome in Patients with Impaired Reproductive Function. Genes 2020, 11, 1511. https://doi.org/10.3390/genes11121511

AMA Style

Karamysheva TV, Gayner TA, Muzyka VV, Orishchenko KE, Rubtsov NB. Two Separate Cases: Complex Chromosomal Abnormality Involving Three Chromosomes and Small Supernumerary Marker Chromosome in Patients with Impaired Reproductive Function. Genes. 2020; 11(12):1511. https://doi.org/10.3390/genes11121511

Chicago/Turabian Style

Karamysheva, Tatyana V., Tatyana A. Gayner, Vladimir V. Muzyka, Konstantin E. Orishchenko, and Nikolay B. Rubtsov. 2020. "Two Separate Cases: Complex Chromosomal Abnormality Involving Three Chromosomes and Small Supernumerary Marker Chromosome in Patients with Impaired Reproductive Function" Genes 11, no. 12: 1511. https://doi.org/10.3390/genes11121511

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