a rapid and highly sensitive method of non radioactive colorimetric in situ hybridization for the detection of mrna on tissue sections快速和高度敏感的非放射性的方法比色检测mrna的原位杂交组织部分.pdfVIP
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a rapid and highly sensitive method of non radioactive colorimetric in situ hybridization for the detection of mrna on tissue sections快速和高度敏感的非放射性的方法比色检测mrna的原位杂交组织部分
A Rapid and Highly Sensitive Method of Non Radioactive
Colorimetric In Situ Hybridization for the Detection of
mRNA on Tissue Sections
1. 1. 2 2
Electra Stylianopoulou , Dimitrios Lykidis , Petros Ypsilantis , Constantinos Simopoulos ,
1 1
George Skavdis , Maria Grigoriou *
1 Department of Molecular Biology and Genetics, Democritus University of Thrace, Alexandroupolis, Greece, 2 School of Medicine, Democritus University of Thrace,
Alexandroupolis, Greece
Abstract
Background: Non Radioactive colorimetric In Situ Hybridization (NoRISH) with hapten labeled probes has been widely used
for the study of gene expression in development, homeostasis and disease. However, improvement in the sensitivity of the
method is still needed to allow for the analysis of genes expressed at low levels.
Methodology/Principal Findings: A stable, non-toxic, zinc-based fixative was tested in NoRISH experiments on sections of
mouse embryos using four probes (Lhx6, Lhx7, ncapg and ret) that have different spatial patterns and expression levels. We
showed that Z7 can successfully replace paraformaldehyde used so far for tissue fixation in NoRISH; the morphology of the
cryosections of Z7-fixed tissues was excellent, and the fixation time required for tissues sized 1 cm was 1 hr instead of 24 hr
for paraformaldehyde. The hybridization signal on the sections of the Z7-treated embryos always appeared earlier than that
of the PFA-fixed embryos. In addition, a 50–60% shorter detection time was observed in specimen of Z7-treated embryos,
reducing significantly the time required to complete the method. Finally and most importantly, the strength of the
hybridization signal on th
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