Method for multiplex cellular detection of mRNAs using quantum dot fluorescent in situ hybridization.

Abstract:

:The photostability and narrow emission spectra of non-organic quantum dot fluorophores (QDs) make them desirable candidates for fluorescent in situ hybridization (FISH) to study the expression of specific mRNA transcripts. We developed a novel method for direct QD labeling of modified oligonucleotide probes through streptavidin and biotin interactions, as well as protocols for their use in multiple-label FISH. We validated this technique in mouse brainstem sections. The subcellular localization of the vesicular monoamine transporter (Vmat2) mRNA corresponds when using probes labeled with two different QDs in the same hybridization. We developed protocols for combined direct QD FISH and QD immunohistochemical labeling within the same neurons as well as for simultaneous study of the subcellular distribution of multiple mRNA targets. We demonstrated increased sensitivity of FISH using QDs in comparison with organic fluorophores. These techniques gave excellent histological results both for multiplex FISH and combined FISH and immunohistochemistry. This approach can facilitate the ultrasensitive simultaneous study of multiple mRNA and protein markers in tissue culture and histological section.

journal_name

Nucleic Acids Res

journal_title

Nucleic acids research

authors

Chan P,Yuen T,Ruf F,Gonzalez-Maeso J,Sealfon SC

doi

10.1093/nar/gni162

keywords:

subject

Has Abstract

pub_date

2005-10-13 00:00:00

pages

e161

issue

18

eissn

0305-1048

issn

1362-4962

pii

33/18/e161

journal_volume

33

pub_type

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