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Biotechniques ; 72(6): 273-278, 2022 06.
Artigo em Inglês | MEDLINE | ID: mdl-35546498

RESUMO

Samples for histological analyses are often formalin-fixed paraffin-embedded (FFPE) and slide-mounted, which complicates RNA extraction for many downstream molecular applications. Furthermore, when the region of interest is extremely small due to isolation with laser microdissection (LMD), extracting RNA of adequate quality and quantity is difficult. We describe an optimized protocol for maximizing RNA output from FFPE tissue devised to identify and analyze gene expression of human maternal uterine scar tissue obtained from uterotomy scars resulting from prior cesarean deliveries. Gomori trichrome staining allowed for region identification for LMD. Successful RNA isolation, reverse transcription and, importantly, quantitative real-time PCR (qRT-PCR) were performed. This report provides an optimized step-by-step protocol yielding sufficient RNA for qRT-PCR analyses from challenging tissue/LMD-FFPE samples.


Assuntos
Cicatriz , RNA , Cicatriz/genética , Formaldeído , Humanos , Microdissecção e Captura a Laser , Lasers , Inclusão em Parafina/métodos , RNA/genética , Fixação de Tecidos/métodos
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