High-throughput real-time PCR.

Area of Science:

• Molecular Biology
• Genomics
• Biotechnology

Background:

• Real-time PCR (polymerase chain reaction) is the established standard for gene expression quantification.
• Standard PCR instruments can be adapted for higher throughput using 384-well reaction blocks.
• Microchip arrays offer higher throughput but can be more costly for specific applications.

Purpose of the Study:

• To present a comprehensive protocol for high-throughput real-time PCR using a 384-well format.
• To demonstrate the utility of this method as an alternative to microarrays for gene expression profiling.
• To provide methods for data analysis and visualization comparable to microarray data.

Main Methods:

• Utilizing SYBR green detection chemistry.
• Employing small reaction volumes (5 µL) to reduce costs.
• Configuring real-time PCR instruments with 384-well plates for increased sample capacity.
• Developing data analysis methods for heat map and cluster generation.

Main Results:

• High-throughput real-time PCR in a 384-well format is feasible and cost-effective.
• The associated costs are comparable to microarrays when using SYBR green and small reaction volumes.
• Data can be analyzed and presented in heat maps and clusters, similar to microarray data.
• Successfully profiled the expression of over 200 microRNA precursors.

Conclusions:

• High-throughput real-time PCR is an excellent alternative to microarrays for assaying several hundred genes.
• This method provides a cost-effective and efficient approach for gene expression profiling.
• The protocol and analysis methods enable comprehensive gene expression studies.