Protein detection methods in formalin-fixed paraffin embedded (FFPE) tissue blocks are widely used in research
and clinical setting in order to diagnose or to confirm a diagnosis of various types of diseases. Therefore, multiple
protein extraction methods from FFPE tissue sections have been developed in this regard. However, the yield and
the quality of proteins extracted from FFPE tissues are significantly reduced in blocks stored for longer periods of
time. Regardless the protein extraction method used, tissue sectionsmust be first deparaffinized with xylene, and
then washed in serial dilutions of ethanol in order to remove the toxic organic solvent ‘‘xylene’’ and rehydrate the
tissue. The objective of this study was first to develop a method to deparaffinize FFPE blocks that excludes the use
of toxic solvent ‘‘xylene’’. Second minimize the time required to perform the extraction