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Infectious pathogen detection arrays: viral detection in cell lines and postmortem brain tissue
Concepcion Conejero-Goldberg1, Ena Wang, Chuli Yi
1Stanley Brain Research Laboratory, Clinical Center, National Institutes of Health, Bethesda, MD, USA. goldbergc@stanleyresearch.org
Biotechniques
|November 30, 2005
Summary
A novel pathogen chip detects viral RNA/DNA in central nervous system disorders. This sensitive and reproducible array-based method identifies a broad spectrum of viruses in a single assay.
Area of Science:
- Neurovirology
- Molecular Diagnostics
- Bioinformatics
Background:
- Central nervous system (CNS) pathologies can be caused by a wide range of viral infections.
- Accurate and rapid detection of viral agents is crucial for diagnosis and treatment of CNS diseases.
- Current diagnostic methods may lack the breadth or sensitivity to identify all potential viral culprits.
Purpose of the Study:
- To develop and validate a novel array-based pathogen chip for the simultaneous detection of diverse viral nucleic acids (RNA/DNA) relevant to CNS pathologies.
- To assess the sensitivity, specificity, and reproducibility of this diagnostic platform.
- To explore its utility in identifying viral infections in clinical samples, including postmortem tissues.
Main Methods:
- Design of a microarray chip with 715 unique 60-mer oligonucleotides targeting approximately 100 pathogens, including viruses, parasites, and bacteria.
- Inclusion of viral genes representing different infection stages for potential staging.
- Sample analysis using cohybridization of Cy5-labeled test samples with Cy3-labeled reference RNA on the pathogen chip.
- Validation using cell lines and viruses to determine detection sensitivity.
Main Results:
- The pathogen chip demonstrated good experimental reproducibility, confirmed by duplicate hybridizations and spots.
- Achieved a viral transcript detection sensitivity of 1 x 10^3 plaque-forming units (pfus) in cell line models.
- The platform successfully detected a broad spectrum of viruses, indicating high sensitivity and specificity.
Conclusions:
- The developed array-based pathogen chip offers a sensitive, specific, and reproducible method for broad-spectrum viral detection in a single assay.
- This technology holds promise for diagnosing viral infections in CNS disorders, including psychiatric conditions and postmortem tissues.
- The platform facilitates comprehensive etiological investigation of neurological diseases with suspected viral origins.