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Comprehensive Spatial Profiling of Species-agnostic Transcriptomes via Stereo-seq
Published on: October 31, 2025
Single-species microarrays and comparative transcriptomics.
Frédéric J J Chain1, Dora Ilieva, Ben J Evans
1Department of Biology, Center for Environmental Genomics, McMaster University, Hamilton, Ontario, Canada.
Plos One
|September 26, 2008
Summary
Using genomic DNA hybridization to select microarray probes for comparative transcriptomics can yield misleading results. Researchers recommend using probes with confirmed sequence identity for accurate cross-species gene expression studies.
Area of Science:
- Comparative genomics
- Transcriptomics
- Bioinformatics
Background:
- Single-species microarrays limit comparative transcriptomics across divergent genomes.
- Methods to extend microarray use to different species are under development.
- Challenges exist in applying expression arrays to interspecies comparisons.
Purpose of the Study:
- To evaluate the reliability of using genomic DNA hybridization for selecting unbiased probes on expression arrays.
- To assess expression divergence between Xenopus laevis, Xenopus borealis, and their F1 hybrids.
- To compare analytical outcomes based on different probe selection strategies.
Main Methods:
- Utilized the Affymetrix Xenopus laevis microarray for expression analysis.
- Compared gene expression data analyzed with probes selected via genomic DNA hybridization versus probes with confirmed sequence identity.
- Investigated expression divergence in Xenopus laevis, X. borealis, and their F1 hybrids.
Main Results:
- Genomic DNA hybridization intensity is an unreliable method for selecting unbiased probes for comparative transcriptomics.
- Using genomic DNA hybridization for probe selection leads to spurious results in expression divergence studies.
- Analysis using probes with confirmed sequence identity yielded substantially different results compared to genomic DNA hybridization methods.
Conclusions:
- Findings impact the experimental design for comparative expression studies using single-species microarrays.
- Highlights limitations of single-species microarrays for polyploid species comparative transcriptomics.
- Improves understanding of divergent gene expression in hybrid clawed frogs.
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