Unknown

Dataset Information

0

Antigen Masking During Fixation and Embedding, Dissected.


ABSTRACT: Antigen masking in routinely processed tissue is a poorly understood process caused by multiple factors. We sought to dissect the effect on antigenicity of each step of processing by using frozen sections as proxies of the whole tissue. An equivalent extent of antigen masking occurs across variable fixation times at room temperature. Most antigens benefit from longer fixation times (>24 hr) for optimal detection after antigen retrieval (AR; for example, Ki-67, bcl-2, ER). The transfer to a graded alcohol series results in an enhanced staining effect, reproduced by treating the sections with detergents, possibly because of a better access of the polymeric immunohistochemical detection system to tissue structures. A second round of masking occurs upon entering the clearing agent, mostly at the paraffin embedding step. This may depend on the non-freezable water removal. AR fully reverses the masking due both to the fixation time and the paraffin embedding. AR itself destroys some epitopes which do not survive routine processing. Processed frozen sections are a tool to investigate fixation and processing requirements for antigens in routine specimens.

SUBMITTER: Scalia CR 

PROVIDER: S-EPMC5256198 | biostudies-literature | 2017 Jan

REPOSITORIES: biostudies-literature

altmetric image

Publications

Antigen Masking During Fixation and Embedding, Dissected.

Scalia Carla Rossana CR   Boi Giovanna G   Bolognesi Maddalena Maria MM   Riva Lorella L   Manzoni Marco M   DeSmedt Linde L   Bosisio Francesca Maria FM   Ronchi Susanna S   Leone Biagio Eugenio BE   Cattoretti Giorgio G  

The journal of histochemistry and cytochemistry : official journal of the Histochemistry Society 20161023 1


Antigen masking in routinely processed tissue is a poorly understood process caused by multiple factors. We sought to dissect the effect on antigenicity of each step of processing by using frozen sections as proxies of the whole tissue. An equivalent extent of antigen masking occurs across variable fixation times at room temperature. Most antigens benefit from longer fixation times (>24 hr) for optimal detection after antigen retrieval (AR; for example, Ki-67, bcl-2, ER). The transfer to a grade  ...[more]

Similar Datasets

| S-EPMC9631987 | biostudies-literature
| S-EPMC5936644 | biostudies-literature
| S-EPMC10963465 | biostudies-literature
| S-EPMC2898805 | biostudies-literature
| S-EPMC4947038 | biostudies-other
| S-EPMC6821889 | biostudies-literature
| S-EPMC6643441 | biostudies-literature
| S-EPMC3369776 | biostudies-literature
| S-EPMC8095589 | biostudies-literature
| S-EPMC6759523 | biostudies-literature