Isoform-Specific Quantification of Human Bitter Taste Receptor Transcripts Using Real-Time PCR Analysis

Area of Science:

• Physiology
• Molecular Biology
• Genetics

Background:

• Bitter taste receptors (TAS2Rs) are crucial sensors for bitter compounds in mammals.
• TAS2Rs are found in various tissues, including oral epithelia, airway epithelia, and the gastrointestinal tract, influencing diverse physiological functions.
• Quantifying individual TAS2R isoforms is challenging due to sequence homology, hindering the study of tissue-specific effects.

Purpose of the Study:

• To develop a precise real-time quantitative PCR (qPCR) method for quantifying each human TAS2R isoform.
• To enable differentiation of TAS2R isoform expression levels for better understanding of their specific roles in different tissues.

Main Methods:

• Development of a real-time quantitative PCR (qPCR) assay.
• Utilization of plasmid standards containing each TAS2R isoform for assay validation.
• Testing the assay's ability to quantify gene expression with minimal cross-interference.

Main Results:

• The developed qPCR assay accurately quantifies individual TAS2R isoform gene expression.
• The method demonstrates negligible interference between highly homologous TAS2R isoforms.
• The assay successfully discriminates mRNA expression levels of different TAS2R isoforms in human cell lines and tissues.

Conclusions:

• The established qPCR method provides a reliable tool for quantifying TAS2R isoform mRNA levels.
• This advancement will facilitate a deeper understanding of the molecular mechanisms governing TAS2R signaling pathways.
• The method supports research into the tissue-specific functions of bitter taste receptors.