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Array Comparative Genomic Hybridization (Array CGH) for Detection of Genomic Copy Number Variants
Published on: February 21, 2015
Array CGH reveals genomic aberrations in human emphysema
Jin Soo Choi1, Woon Jeong Lee, Seung Ho Baik
1Catholic Neuroscience Center, The Catholic University, Seoul, Korea.
Lung
|April 9, 2009
Summary
Genetic factors contribute to emphysema, a major component of chronic obstructive pulmonary disease (COPD). Array comparative genomic hybridization identified specific gene copy number alterations in emphysema patients, highlighting potential genetic targets for disease pathogenesis.
Area of Science:
- Genetics
- Pulmonology
- Molecular Biology
Background:
- Emphysema, a primary component of chronic obstructive pulmonary disease (COPD), is a significant global health concern.
- Epidemiological studies indicate a substantial role for genetic factors in emphysema development.
- Identifying genetic underpinnings is crucial for understanding emphysema pathogenesis.
Purpose of the Study:
- To investigate chromosomal aberrations in emphysema patients using array comparative genomic hybridization (array CGH).
- To identify candidate genes potentially involved in the pathogenesis of emphysema through gene expression profiling.
- To validate array CGH findings using real-time polymerase chain reaction.
Main Methods:
- Analysis of gene expression profiles of chromosomal aberrations in 32 emphysema patients via array CGH.
- Detection and confirmation of copy number gains and losses in specific chromosomal regions.
- Real-time polymerase chain reaction (PCR) for validating identified gene alterations.
Main Results:
- Frequent DNA gains observed at chromosomal regions 1p, 5p, 11p, 12p, 15q, 17p, 18q, 21q, and 22q.
- Frequent DNA losses identified at chromosomal regions 7q and 22q.
- Specific genes with high fold change levels included CYP4B1, JUN, NOTCH2, SDHA, KCNQ1, NINJ2, PCSK6, ABR, CTDP1, RUNX1, and HDAC10. Losses were noted in MUC17, COMT, and GSTT1.
Conclusions:
- Array CGH is an effective tool for identifying gene alterations in emphysema.
- The identified genes (e.g., CYP4B1, JUN, NOTCH2, SDHA, KCNQ1, NINJ2, PCSK6, ABR, CTDP1, RUNX1, HDAC10, MUC17, COMT, GSTT1) represent potential candidate genes in emphysema pathogenesis.
- Further research into these genetic alterations may elucidate emphysema mechanisms and inform therapeutic strategies.
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Emphysema, a major phenotype of chronic obstructive pulmonary disease (COPD), is characterized by irreversible destruction of alveolar walls and permanent enlargement of distal airspaces. Unlike chronic bronchitis, which primarily affects the airways, emphysema predominantly involves the lung parenchyma, where structural damage leads to airflow limitation.PathophysiologyIt most commonly results from prolonged exposure to cigarette smoke and other toxic gases, particularly cigarette smoke.
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GWAS does not require the identification of the target gene involved in...