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Tissue-specific expression pattern of bovine prion gene: quantification using real-time RT-PCR.

Ales Tichopad1, Michael W Pfaffl, Andrea Didier

  • 1Institute of Physiology, FML Weihenstephan, Technical University of Munich, Weihenstephaner Berg 3, 85354 Freising, Germany.

Molecular and Cellular Probes
|March 12, 2003
PubMed
Summary

This study quantifies bovine prion mRNA using real-time RT-PCR, revealing expression across various tissues. Lymphatic organs show high prion mRNA levels, comparable to the brain, offering insights into prion disease pathogenesis.

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Area of Science:

  • Veterinary Medicine
  • Molecular Biology
  • Neuroscience

Background:

  • Prion mRNA quantification previously relied on imprecise methods like in situ hybridization and Northern Blot analysis.
  • Accurate measurement of prion protein (PrP) mRNA levels is crucial for understanding prion-related diseases.

Purpose of the Study:

  • To quantify bovine PrP mRNA copy numbers across various central nervous system (CNS) and peripheral organs.
  • To establish a precise method for PrP mRNA quantification using real-time RT-PCR.

Main Methods:

  • Isolation of total RNA from nine CNS regions and seven peripheral organs.
  • Application of calibrated, externally standardized real-time RT-PCR (qRT-PCR) using the LightCycler instrument for absolute quantification of PrP mRNA.

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Main Results:

  • Bovine PrP mRNA was successfully quantified in all examined tissues.
  • High PrP mRNA levels were observed in the Neocortex and Cerebellum, consistent with prior studies.
  • Lymphatic organs exhibited prion mRNA expression levels as high as those in the brain, with the kidney showing the lowest expression.

Conclusions:

  • Real-time RT-PCR with LightCycler technology provides a precise method for quantifying PrP mRNA in various bovine tissues.
  • The widespread expression of PrP mRNA, particularly in lymphatic organs, suggests their involvement in prion pathogenesis.
  • This quantification method is a powerful tool for future research into prion diseases.