Prenatal genetic analysis of three fetuses with abnormalities of chromosome 22 / 中华医学遗传学杂志
Chinese Journal of Medical Genetics
; (6): 405-409, 2020.
Article
in Zh
| WPRIM
| ID: wpr-828314
Responsible library:
WPRO
ABSTRACT
OBJECTIVE@#To carry out genetic testing for 3 fetuses with abnormal prenatal screening.@*METHODS@#Fetal ultrasound, karyotype analysis, single nucleotide polymorphism (SNP) array and fluorescence in situ hybridization were performed.@*RESULTS@#Abnormalities of chromosome 22 were found with all 3 fetuses. Fetus 1 harbored a 7.1 Mb deletion in 22q13.2q13.33 region, which involved 54 OMIM genes including SHANK3 and FBLN1. Fetus 2 had a mosaicism karyotype, with 12% of cells harboring a 6.6 Mb deletion in 22q13.31q13.33, covering 48 OMIM genes such as SHANK3 and PPARA, and 5% of cells harboring a 26.1 Mb duplication in 22q11.1q13.2 involving 285 OMIM genes. Fetus 3 carried a tandem duplication of 1.7 Mb in 22q11.1q11.21, which involved 10 OMIM genes including CECR1, CECR2 and ATP6V1E1. No abnormality was found in the three couples by chromosomal karyotyping and SNP array analysis.@*CONCLUSION@#The severity of diseases caused by chromosome 22 abnormalities not only depends on the range of the deletion or duplication, but is also closely related to chromosome structure, gene dose and genetic environment. Combined ultrasonography and various genetic testing techniques in prenatal diagnosis can greatly increase the detection rate of genetic diseases with substantial phenotypic variation.
Full text:
1
Database:
WPRIM
Main subject:
Prenatal Diagnosis
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Transcription Factors
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Chromosomes, Human, Pair 22
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Genetic Testing
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Ultrasonography, Prenatal
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Chromosome Aberrations
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Chromosome Deletion
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In Situ Hybridization, Fluorescence
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Chromosome Disorders
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Diagnosis
Type of study:
Diagnostic_studies
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Prognostic_studies
Limits:
Female
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Humans
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Pregnancy
Language:
Zh
Journal:
Chinese Journal of Medical Genetics
Year:
2020
Document type:
Article