Quantigene Plex Assay
Quantigene Plex Assay - Related Videos
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FAQs
Each bead population carries target-specific capture probes and a distinct color code. RNA from a cell or tissue lysate binds to the matching probes, while the bead identity links the captured material to a particular gene target. A Luminex-based reader therefore determines both which target is represented and the signal associated with it during the same multiplexed analysis.
Branched DNA creates a larger enzyme-linked detection structure on captured RNA, increasing the chemiluminescent signal without copying the RNA target itself. This distinction allows the assay to measure target-associated signal directly from lysates rather than relying on reverse transcription or PCR. The resulting signal supports quantitative comparison of RNA expression across multiple targets.
The Quantigene Plex Assay measures RNA through probe hybridization and branched DNA signal amplification, so the workflow does not require reverse transcription or PCR. Its analytical design is therefore based on capturing and detecting RNA in lysates rather than first converting or amplifying nucleic acids. This makes multiplexed gene-expression measurements possible within its bead-based format.
Multiplexing places several RNA measurements in a shared analysis, allowing expression patterns to be examined across pathways or biomarker groups rather than as isolated genes. In bioengineering studies, this can reveal coordinated responses associated with engineered cells, tissue models, or material exposure. Comparing related targets together helps connect gene regulation with broader biological responses.
A typical workflow begins with cell or tissue lysates, followed by hybridization of RNA to target-specific probes immobilized on color-coded microspheres. Probe sets and enzyme-linked amplifier molecules then generate chemiluminescent signals. Finally, a Luminex-based reader identifies each bead and measures its associated signal, producing parallel quantitative information for the selected RNA targets.
The reader provides two linked measurements: bead identity and associated chemiluminescent signal. Bead identification indicates which probe-defined RNA target was captured, while signal intensity supplies the quantitative readout for that target. Together, these outputs allow researchers to assess multiple gene-expression measurements in parallel and examine pathway- or biomarker-level patterns.
The method is useful when researchers need parallel gene-expression information from tissue models, engineered cellular systems, or studies of biomaterial interactions. It can also support therapeutic development by measuring selected biomarkers and responses together. These applications connect RNA-level changes with engineered environments, tissue behavior, or treatment-related effects without limiting analysis to a single target.