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Clinical and molecular cytogenetic analyses of four patients with imbalanced translocations.

Liu HY, Huang J, Li T, Wu D, Wang HD, Wang Y, Wang T, Guo LJ, Guo QN, Huang FF, Wang RL, Wang YT - Mol Cytogenet (2016)

Bottom Line: In addition to the above features, lower limbs dysplasia and both foot eversion were found in patient 1, brachydactylic hand, cerebellar ataxia and congenital heart defects were also found in patient 4.Array-CGH analyses confirmed 23.6 Mb duplication on 10q25.1-q26.3 and 0.9 Mb deletions on 6p25.3, 19.9 Mb duplication on 3p24.3-p26.3 and 0.25 Mb deletion on 20p13 and 12.5 Mb duplication on 3q27.2-q29 and 1.9 Mb deletions on 22q13.2-q13.33 in the four patients, respectively.Parents with balanced translocation are passed the imbalanced chromosome to patient, and the partial monosomy and partial trisomy lead to multiple congenital malformations of four patients.

View Article: PubMed Central - PubMed

Affiliation: Department of Medical Genetics Institute, People's Hospital of Zhengzhou University (Henan Provincial People's Hospital), Zhengzhou, 450003 Henan China.

ABSTRACT

Background: Chromosomal abnormalities that result in genomic imbalances are main causes of congenital and developmental anomalies including intellectual disability and multiple congenital malformations. In this report we describe four patients from three families with imbalanced translocations. Only a small percentage of imbalanced translocation individuals can be born to live, most of them were aborted in embryonic period. It is of great significances to precisely analysis the chromosome variation to study the relationship between genotype and phenotype.

Results: Four patients showed common clinical manifestations including delayed growth, intellectual disability, language barrier and facial dysmorphisms. In addition to the above features, lower limbs dysplasia and both foot eversion were found in patient 1, brachydactylic hand, cerebellar ataxia and congenital heart defects were also found in patient 4. Conventional karyotype analysis revealed abnormal karyotypes 46, XX, der (6) t (6: 10) (p23; q24), 46, XX, der (20) t (3; 20) (p23; p13) and 46, XX, der (22) t (3; 22) (q27; q13.3) in the four patients, respectively. Array-CGH analyses confirmed 23.6 Mb duplication on 10q25.1-q26.3 and 0.9 Mb deletions on 6p25.3, 19.9 Mb duplication on 3p24.3-p26.3 and 0.25 Mb deletion on 20p13 and 12.5 Mb duplication on 3q27.2-q29 and 1.9 Mb deletions on 22q13.2-q13.33 in the four patients, respectively.

Conclusion: Parents with balanced translocation are passed the imbalanced chromosome to patient, and the partial monosomy and partial trisomy lead to multiple congenital malformations of four patients.

No MeSH data available.


Related in: MedlinePlus

Array-CGH analysis showed telomeric rearrangements on two different chromosomes in four patients (a: patient 1; b: patient 2 and 3; c: patient 4). The log ratio was reported (log2 intensity of [Cy5 fluorochrome/Cy3 fluorochrome)] on the X-axis. Expected values were from −0.7 to −1 for a deletion (red color), 0 for normal (black line), and +0.5 to +1 for a duplication (blue color)
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Fig3: Array-CGH analysis showed telomeric rearrangements on two different chromosomes in four patients (a: patient 1; b: patient 2 and 3; c: patient 4). The log ratio was reported (log2 intensity of [Cy5 fluorochrome/Cy3 fluorochrome)] on the X-axis. Expected values were from −0.7 to −1 for a deletion (red color), 0 for normal (black line), and +0.5 to +1 for a duplication (blue color)

Mentions: Array-CGH analysis was performed on lymphocytes DNA of this patient and detected a 23.6 Mb duplication at 10q25.1-q26.3 (chr10:111770926–135404523) and a 0.9 Mb deletion at 6p25.3 (chr6:170426–1106808) (Fig. 3a).Fig. 3


Clinical and molecular cytogenetic analyses of four patients with imbalanced translocations.

Liu HY, Huang J, Li T, Wu D, Wang HD, Wang Y, Wang T, Guo LJ, Guo QN, Huang FF, Wang RL, Wang YT - Mol Cytogenet (2016)

Array-CGH analysis showed telomeric rearrangements on two different chromosomes in four patients (a: patient 1; b: patient 2 and 3; c: patient 4). The log ratio was reported (log2 intensity of [Cy5 fluorochrome/Cy3 fluorochrome)] on the X-axis. Expected values were from −0.7 to −1 for a deletion (red color), 0 for normal (black line), and +0.5 to +1 for a duplication (blue color)
© Copyright Policy - OpenAccess
Related In: Results  -  Collection

License 1 - License 2
Show All Figures
getmorefigures.php?uid=PMC4837590&req=5

Fig3: Array-CGH analysis showed telomeric rearrangements on two different chromosomes in four patients (a: patient 1; b: patient 2 and 3; c: patient 4). The log ratio was reported (log2 intensity of [Cy5 fluorochrome/Cy3 fluorochrome)] on the X-axis. Expected values were from −0.7 to −1 for a deletion (red color), 0 for normal (black line), and +0.5 to +1 for a duplication (blue color)
Mentions: Array-CGH analysis was performed on lymphocytes DNA of this patient and detected a 23.6 Mb duplication at 10q25.1-q26.3 (chr10:111770926–135404523) and a 0.9 Mb deletion at 6p25.3 (chr6:170426–1106808) (Fig. 3a).Fig. 3

Bottom Line: In addition to the above features, lower limbs dysplasia and both foot eversion were found in patient 1, brachydactylic hand, cerebellar ataxia and congenital heart defects were also found in patient 4.Array-CGH analyses confirmed 23.6 Mb duplication on 10q25.1-q26.3 and 0.9 Mb deletions on 6p25.3, 19.9 Mb duplication on 3p24.3-p26.3 and 0.25 Mb deletion on 20p13 and 12.5 Mb duplication on 3q27.2-q29 and 1.9 Mb deletions on 22q13.2-q13.33 in the four patients, respectively.Parents with balanced translocation are passed the imbalanced chromosome to patient, and the partial monosomy and partial trisomy lead to multiple congenital malformations of four patients.

View Article: PubMed Central - PubMed

Affiliation: Department of Medical Genetics Institute, People's Hospital of Zhengzhou University (Henan Provincial People's Hospital), Zhengzhou, 450003 Henan China.

ABSTRACT

Background: Chromosomal abnormalities that result in genomic imbalances are main causes of congenital and developmental anomalies including intellectual disability and multiple congenital malformations. In this report we describe four patients from three families with imbalanced translocations. Only a small percentage of imbalanced translocation individuals can be born to live, most of them were aborted in embryonic period. It is of great significances to precisely analysis the chromosome variation to study the relationship between genotype and phenotype.

Results: Four patients showed common clinical manifestations including delayed growth, intellectual disability, language barrier and facial dysmorphisms. In addition to the above features, lower limbs dysplasia and both foot eversion were found in patient 1, brachydactylic hand, cerebellar ataxia and congenital heart defects were also found in patient 4. Conventional karyotype analysis revealed abnormal karyotypes 46, XX, der (6) t (6: 10) (p23; q24), 46, XX, der (20) t (3; 20) (p23; p13) and 46, XX, der (22) t (3; 22) (q27; q13.3) in the four patients, respectively. Array-CGH analyses confirmed 23.6 Mb duplication on 10q25.1-q26.3 and 0.9 Mb deletions on 6p25.3, 19.9 Mb duplication on 3p24.3-p26.3 and 0.25 Mb deletion on 20p13 and 12.5 Mb duplication on 3q27.2-q29 and 1.9 Mb deletions on 22q13.2-q13.33 in the four patients, respectively.

Conclusion: Parents with balanced translocation are passed the imbalanced chromosome to patient, and the partial monosomy and partial trisomy lead to multiple congenital malformations of four patients.

No MeSH data available.


Related in: MedlinePlus