Analysis of Specific RNA in Cultured Cells Through Quantitative Integration of Q-PCR and N-SIM Single Cell FISH Images: Application to Hormonal Stimulation of StAR Transcription

Overview

Journal Mol Cell Endocrinol

Specialties Cell Biology
Endocrinology
Molecular Biology

Date 2016 Apr 20

PMID 27091298

Citations 10

Authors

Jinwoo Lee

Yee Hoon Foong

Ibrahim Musaitif

Tiegang Tong

Colin Jefcoate

Affiliations

Soon will be listed here.

Abstract

The steroidogenic acute regulatory protein (StAR) has been proposed to serve as the switch that can turn on/off steroidogenesis. We investigated the events that facilitate dynamic StAR transcription in response to cAMP stimulation in MA-10 Leydig cells, focusing on splicing anomalies at StAR gene loci. We used 3' reverse primers in a single reaction to respectively quantify StAR primary (p-RNA), spliced (sp-RNA/mRNA), and extended 3' untranslated region (UTR) transcripts, which were quantitatively imaged by high-resolution fluorescence in situ hybridization (FISH). This approach delivers spatio-temporal resolution of initiation and splicing at single StAR loci, and transfers individual mRNA molecules to cytoplasmic sites. Gene expression was biphasic, initially showing slow splicing, transitioning to concerted splicing. The alternative 3.5-kb mRNAs were distinguished through the use of extended 3'UTR probes, which exhibited distinctive mitochondrial distribution. Combining quantitative PCR and FISH enables imaging of localization of RNA expression and analysis of RNA processing rates.

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