Abstract
In the context of mRNA biomarker profiling, formalin fixed paraffin embedded (FFPE) samples represent an interesting source for retrospective analysis. However, the implementation in routine analysis of FFPE samples, following legislation demands for validated and accredited methods, often requires critical revision and optimization. In the frame of an official control program the validation study of a molecular test for detection of sex steroids administration in calves, based on quantification of progesterone-Receptor mRNA in bulbo-urethral gland samples, was performed: analyses were made on FFPE tissues sections routinary used for histological investigations and compared with RNAlater tissue preservation.To overcome the limitations of original assays several modifications were tested. Obtained results confirmed how Progesterone-Receptor assay represent a useful tool to study suspected cases of sex steroid illicit administration in veal calves, complementary to histological and/or immune histochemical investigation, overcoming the limitation of field studies, where optimal pre-analytical condition cannot always be guarantee.
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