TY - JOUR
T1 - Implementation of a proficiency testing for the assessment of the preanalytical phase of blood samples used for RNA based analysis
AU - Günther, Kalle
AU - Malentacchi, Francesca
AU - Verderio, Paolo
AU - Pizzamiglio, Sara
AU - Ciniselli, Chiara Maura
AU - Tichopad, Ales
AU - Kubista, Mikael
AU - Wyrich, Ralf
AU - Pazzagli, Mario
AU - Gelmini, Stefania
PY - 2012/4/11
Y1 - 2012/4/11
N2 - Background: Although important improvements of downstream molecular in vitro diagnostics assays based on RNA from blood were made, the pre-analytical workflow is still poorly defined. Methods: We performed a multicenter study within the EU-granted SPIDIA project to investigate blood collection and shipping influence on the following RNA quality parameters: yield, purity, integrity, RT-qPCR interference and IL1B, IL8, FOS and GAPDH gene expression. Two models were designed: Exp A. Ten laboratories collected blood from an own donor into two different tubes (with or without stabilizer) and extracted RNA at two different times; Exp B. Blood was drawn from a single donor and shipped to ten laboratories in two different tubes (with or without stabilizer) for RNA extraction. Results: In both models and collection tubes, reliable results were obtained for purity, yield, GAPDH expression, and interferences. A substantial variation in RIN (Exp A) and in transcription levels of IL1B, IL8 and FOS (Exp B) was observed for blood collected in tube without stabilizer tubes. Overall the variability was higher among data obtained from unstabilized blood samples. Conclusions: We defined the experimental setup for a larger ring trial throughout Europe. The chosen downstream analyses verified their potential, serving as adequate markers to test the quality of blood RNA.
AB - Background: Although important improvements of downstream molecular in vitro diagnostics assays based on RNA from blood were made, the pre-analytical workflow is still poorly defined. Methods: We performed a multicenter study within the EU-granted SPIDIA project to investigate blood collection and shipping influence on the following RNA quality parameters: yield, purity, integrity, RT-qPCR interference and IL1B, IL8, FOS and GAPDH gene expression. Two models were designed: Exp A. Ten laboratories collected blood from an own donor into two different tubes (with or without stabilizer) and extracted RNA at two different times; Exp B. Blood was drawn from a single donor and shipped to ten laboratories in two different tubes (with or without stabilizer) for RNA extraction. Results: In both models and collection tubes, reliable results were obtained for purity, yield, GAPDH expression, and interferences. A substantial variation in RIN (Exp A) and in transcription levels of IL1B, IL8 and FOS (Exp B) was observed for blood collected in tube without stabilizer tubes. Overall the variability was higher among data obtained from unstabilized blood samples. Conclusions: We defined the experimental setup for a larger ring trial throughout Europe. The chosen downstream analyses verified their potential, serving as adequate markers to test the quality of blood RNA.
KW - Blood RNA stabilization
KW - Gene expression
KW - Multicenter study
KW - Profiling
KW - Ring trial
KW - Standardization
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U2 - 10.1016/j.cca.2012.01.015
DO - 10.1016/j.cca.2012.01.015
M3 - Article
C2 - 22285774
AN - SCOPUS:84857642626
VL - 413
SP - 779
EP - 786
JO - Clinica Chimica Acta
JF - Clinica Chimica Acta
SN - 0009-8981
IS - 7-8
ER -