DNA Microarray Test in India – Advanced Gene Expression & Mutation Analysis
Test Overview
- Sample Required: Blood or tissue
- Fasting: Not required
- Turnaround Time: 2-3 weeks
- Base Cost: [Insert Current 2026 Price]
Definition and Clinical Utility
A DNA Microarray Test is a high-throughput genomic technology that simultaneously analyzes thousands of genes to detect mutations, single nucleotide polymorphisms (SNPs), and gene expression patterns. Unlike traditional PCR or qPCR, which target a limited set of genes, microarray technology provides a comprehensive view of the genomic landscape, making it invaluable in hereditary oncology and personalized medicine.
In the context of Genomic & Hereditary Oncology, DNA microarrays are used to identify germline mutations associated with cancer predisposition syndromes, as well as somatic mutations in tumor tissues. This information guides risk assessment, early detection, and targeted therapeutic strategies.
Technical Workflow of DNA Microarray Testing
The process involves several precise steps:
- Sample Collection: DNA or RNA is extracted from the patient's blood or tissue sample.
- cDNA Preparation: RNA is reverse-transcribed into complementary DNA (cDNA) for expression analysis.
- Labeling: The cDNA is labeled with fluorescent markers for detection.
- Hybridization: Labeled cDNA is applied to the microarray chip, where it binds to complementary probes.
- Data Analysis: Fluorescence patterns are scanned and analyzed using specialized bioinformatics software to quantify gene expression or identify genetic variants.
This high-throughput approach enables simultaneous assessment of thousands of genes, offering a comprehensive molecular profile.
Types of DNA Microarray Tests
DNA microarray testing can be categorized into three main types, each serving distinct clinical purposes:
| Type | Purpose | Clinical Utility |
|---|---|---|
| Microarray Mutation Analysis | Detects single nucleotide polymorphisms (SNPs) and genetic mutations using genomic DNA (gDNA). | Identifies germline mutations associated with hereditary cancer syndromes. |
| Microarray Gene Expression Analysis | Measures the activity of genes derived from mRNA in normal vs diseased tissues. | Assesses overexpression or underexpression of oncogenes and tumor suppressors. |
| Comprehensive Genomic Analysis | Detects increases or decreases in chromosomal fragments (copy number variations). | Evaluates chromosomal aberrations linked to cancer progression. |
Clinical Applications in Hereditary Oncology
DNA microarray testing plays a pivotal role in hereditary oncology by:
- Identifying pathogenic variants in genes such as BRCA1, BRCA2, TP53, and MLH1 that predispose to breast, ovarian, colorectal, and other cancers.
- Guiding prophylactic interventions and surveillance strategies for at-risk individuals.
- Informing targeted therapy selection based on tumor gene expression profiles.
- Facilitating pharmacogenomic assessments to optimize drug efficacy and minimize toxicity.
While next-generation sequencing (NGS) has become the gold standard for comprehensive genomic profiling, DNA microarrays remain a cost-effective and robust tool for targeted mutation panels and copy number analysis.
Benefits and Limitations
Benefits
- High-throughput screening of thousands of genes simultaneously.
- Rapid turnaround compared to sequential single-gene testing.
- Comprehensive insights for diagnosis, prognosis, and treatment planning.
- Non-invasive sample collection options (blood, buccal swab).
Limitations
- Cannot detect all types of mutations (e.g., large insertions/deletions, structural variants) as effectively as NGS.
- Requires specialized bioinformatics expertise for accurate interpretation.
- May not cover all clinically relevant genes; targeted panels are limited.
Booking and Sample Collection at DNA Labs India
DNA Labs India offers DNA Microarray Testing across 180+ cities with convenient home sample collection. To book a test:
- Visit our website: www.dnalabsindia.com
- Call your nearest branch or sample collection center.
- Schedule a home sample collection at your preferred time slot.
Why Choose DNA Labs India
- ISO 9001 certified lab ensuring quality and reliability.
- Advanced microarray technology for accurate genetic insights.
- Confidential and secure testing with expert analysis.
- Nationwide coverage with home collection services.