What question did this study set out to answer?

To evaluate whether genomic DNA normalization provides a reliable standard for comparing DNA microarray gene expression data in Mycobacterium tuberculosis across growth phases.

October 15, 2002Nucleic Acids ResearchOpen Access

Genomic DNA standards for gene expression profiling in Mycobacterium tuberculosis

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To evaluate whether genomic DNA normalization provides a reliable standard for comparing DNA microarray gene expression data in Mycobacterium tuberculosis across growth phases.
Extracted RNA from Mycobacterium tuberculosis cultures grown to logarithmic and stationary phases and hybridized the samples to DNA microarrays alongside genomic DNA standards.
Assessed gene expression across putative mycobacterial open reading frames and validated a subset of genes using real-time PCR to compare genomic DNA normalization against RNA normalization.
Genomic DNA normalization produced reproducible expression data for 98% of putative mycobacterial open reading frames, with 5.2% exhibiting significant differential expression between logarithmic and stationary growth phases.
Validation against real-time PCR demonstrated 90% expression concordance under genomic DNA normalization compared to 29% to 68% concordance under traditional RNA normalization.

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Implication

Experimental study reveals improved accuracy using genomic DNA normalization for microarray profiling in Mycobacterium tuberculosis, indicating a reliable standard for microbial transcriptomics.

Cite This Study

Adel M. Talaat (2002) studied this question.

synapsesocial.com/papers/6a8683adbe683fd904a98d1c https://doi.org/10.1093/nar/gnf103

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Implication

Experimental study reveals improved accuracy using genomic DNA normalization for microarray profiling in Mycobacterium tuberculosis, indicating a reliable standard for microbial transcriptomics.

Genomic DNA standards for gene expression profiling in Mycobacterium tuberculosis

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Discussion

Implication

Cite This Study

Genomic DNA standards for gene expression profiling in Mycobacterium tuberculosis

Key Points

Discussion

Implication

Cite This Study

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