Use of multiplex PCR and CE for gene dosage quantification and its biomedical applications for SMN, PMP22, and alpha-globin genes.
Many genetic diseases are caused by the presence of point mutations, small insertions, and deletions in respective genes, and the number of diseases known to be caused by deletions and duplications involving large DNA genomes is increasing. These changes lead to underexpression or overexpression of the gene, according to changes in gene dosage. The methods for the detection of point mutations, small insertions, and deletions are well established, but the detection of larger genomic deletions or duplications is more difficult. Due to the lack of efficient and technically feasible protocols for gene dosage quantification, we describe a diagnostic protocol employing a combination of available methods. The efficient and accurate gene dosage quantification platform is combined with multiplex PCR and CE, and applied to detect dosages of several genes, including SMN, PMP22, and alpha-globin genes. The reliability of this novel methodology shows that it is a relatively speedy and low-cost procedure and a significant tool for genetic diagnosis. Its sensitivity and specificity for identifying deletion and duplication genotypes approach 100%. Moreover, once we establish this powerful system, we will further apply this technique to the rapid detection of trisomy syndromes and microdeletion syndromes, including trisomy 13, Down syndrome, DiGeorge syndrome, and others.
Hung
Chia-Cheng
CC
Institute of Biomedical Engineering, College of Medicine and College of Engineering, National Taiwan University, Taipei, Taiwan.
Chien
Shu-Chin
SC
Lin
Chia-Yun
CY
Chang
Chien-Hui
CH
Chang
Yin-Fei
YF
Jong
Yuh-Jyh
YJ
Hsieh
Sung-Tsang
ST
Hsieh
Wu-Shiun
WS
Liu
Ming S
MS
Lin
Win-Li
WL
Lee
Chien-Nan
CN
Su
Yi-Ning
YN
D001483:Base Sequence; D017362:Cyclic AMP Response Element-Binding Protein / Q000235:genetics*; D004247:DNA / Q000235:genetics / Q000302:isolation & purification; D017931:DNA Primers / Q000235:genetics; D019075:Electrophoresis, Capillary / Q000379:methods*; D018628:Gene Dosage; D023281:Genomics / Q000379:methods; D005914:Globins / Q000235:genetics*; D006801:Humans; D009185:Myelin Proteins / Q000235:genetics*; D009419:Nerve Tissue Proteins / Q000235:genetics*; D016133:Polymerase Chain Reaction / Q000379:methods*; D016601:RNA-Binding Proteins / Q000235:genetics*; D055532:SMN Complex Proteins
D017362:Cyclic AMP Response Element-Binding Protein; D017931:DNA Primers; D009185:Myelin Proteins; D009419:Nerve Tissue Proteins; C073687:PMP22 protein, human; D016601:RNA-Binding Proteins; D055532:SMN Complex Proteins; D005914:Globins; D004247:DNA