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Updated: May 10, 2026
Array Comparative Genomic Hybridization (Array CGH) for Detection of Genomic Copy Number Variants
Published on: February 21, 2015
[Application of array-CGH and MLPA for detection of 4 cryptic unbalanced translocations]
Qian Geng1, Weiqing Wu, Fuwei Luo
1Central Laboratory, Shenzhen Maternity and Child Healthcare Hospital, Shenzhen, Guangdong 518048, P.R. China.
Objective:
To use array comparative genomic hybridization (array-CGH) and multiplex ligation-dependent probe amplification (MLPA) to detect unbalanced rearrangements in 4 cases suspected to have chromosome disease but were undetected with conventional karyotype analysis, and to assess the applicability of array-CGH and MLPA for detection of unbalanced translocation.
Methods:
Genomic DNA was extracted with standard procedures. All cases were analyzed by array-CGH and subtelomeric MLPA.
Results:
All of the cases were identified to have unbalanced translocations by array-CGH analysis, among which 3 were consistent with subtelomeric MLPA analysis. For the remaining one, its chromosomal abnormality was not detected by MLPA as the imbalance has occurred outside of target regions.
Conclusion:
Both array-CGH and MLPA techniques can complement conventional karyotyping for detecting unbalanced translocations. The combination features both high resolution and efficiency for clinical use.
