Heat-induced antigen retrieval in fluorescence in situ hybridization: An effective approach enhancing signal intensity in poor-quality FFPE sections

xlomafota13 shared this article with you from Inoreader Heat-induced antigen retrieval in fluorescence <em>in situ</em> hybridization: An effective approach enhancing signal intensity in poor-quality FFPE sections Via Experimental and therapeutic medicine Exp Ther Med. 2021 Dec;22(6):1480. doi: 10.3892/etm.2021.10915. Epub 2021 Oct 25. ABSTRACT Fluorescence in situ hybridization (FISH) serves as an ancillary tool for assessing chromosomal abnormalities and is important in differential diagnoses and treatment decisions. In clinical practice, pathologists encounter unsatisfactory formalin-fixed paraffin-embedded (FFPE) sections exhibiting weak fluorescence signals, mostly due to inappropriate tissue processing or preservation, leading to interpretation difficulties. For the present study, FFPE samples for which conventional FISH failed were collected. Instead of a pretreatment step using a commercial kit, heat-induced antigen retrieval (HIAR) was introduced using either citrate buffer or Tris-EDTA buffer, while the subsequent experimental workflow remained unchanged. After HIAR-assisted FISH, the hybridization efficiency and signal intensity were markedly enhanced and no difference in signal adequacy was observed when comparing the effect of the two AR solutions. The present study demonstrated that HIAR is a reliable tool for FISH, particularly for poor-quality FFPE sections yielding weak or no fluorescence signals in the conventional analysis. PMID:34765021 | PMC:PMC8576618 | DOI:10.3892/etm.2021.10915 View on the web Inoreader. Take back control of your news feed. Follow us on Twitter and Facebook.