Antigen retrieval on epoxy sections based on tissue infiltration with a moderately increased amount of accelerator to detect immune complex deposits in glomerular tissue.

Abstract:

:We wanted to examine the effect of antigen retrieval on epoxy sections where the tissue had been infiltrated by resin containing moderately increased amounts of accelerator. The concentration of accelerator DMP-30 (Tri(Dimethyl Amino Methyl) Phenol) was varied in the range of 0% to 4% in the infiltration step of the tissue processing. Some of the epoxy sections were fixed in osmium tetroxide, and for others this fixative was avoided. Immunogold labeling was performed on epoxy sections and LR-White sections of renal tissue with IgG-deposits, and the antibody used was anti-IgG. Antigen retrieval was performed by heating the sections in citrate buffer. The amount of immunogold labeling on retrieved sections increased according to the amount of accelerator the non-osmicated epoxy sections were based on in the infiltration steps. For the osmicated epoxy sections these differences were less pronounced. The immunogold labeling of retrieved epoxy sections was up to 70% of LR-White labeling. In addition to breaking fixation bond introduced by the chemical fixation, we believe that the antigen retrieval also breaks bonds between the epoxy resin and the embedded tissue. The combination of increased amount of accelerator in the tissue infiltration and antigen retrieval by heating the sections in citrate buffer is a good method for improving the immunolabeling of epoxy sections.

journal_name

Histol Histopathol

authors

Brorson SH,Andersen T,Haug S,Kristiansen I,Risstubben A,Tchou H,Ulstein J

doi

10.14670/HH-14.151

subject

Has Abstract

pub_date

1999-01-01 00:00:00

pages

151-5

issue

1

eissn

0213-3911

issn

1699-5848

journal_volume

14

pub_type

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