Development of a universal internal positive control.

Area of Science:

• Molecular Biology
• Biotechnology
• Analytical Chemistry

Background:

• Accurate quantification and detection in molecular assays rely on effective quality control measures.
• Existing internal positive controls (IPCs) may present limitations in specificity, adaptability, or synthetic design.

Purpose of the Study:

• To develop and characterize a novel, fully synthetic, exogenous internal positive control (IPC) for molecular amplification assays.
• To assess the specificity, sensitivity to inhibition, and adaptability of the designed IPC.

Main Methods:

• Rational design and synthesis of a novel exogenous internal positive control (IPC).
• Evaluation of IPC amplification efficiency and specificity using qPCR assays.
• Testing IPC cross-reactivity against human and various non-human DNA samples.
• Assessment of IPC sensitivity to common amplification inhibitors.

Main Results:

• The synthetic IPC demonstrated efficient amplification, suitable for use alone or in multiplex (triplex) qPCR reactions.
• No cross-reactivity was observed with human DNA or numerous tested non-human DNA samples, confirming high specificity.
• The IPC was sensitive to inhibition by at least four common amplification inhibitors, indicating its utility as a reaction quality indicator.

Conclusions:

• The developed synthetic exogenous IPC provides a robust and versatile solution for quality control in molecular assays.
• Its design ensures specificity, sensitivity to inhibition, and broad applicability, potentially including qPCR, PCR, and RT-PCR.
• This novel IPC enhances the reliability and accuracy of molecular diagnostic and research applications.